/* ═══════════════════════════════════════════════════════════════════════════
   EDUPAD - MODERN DESIGN SYSTEM
   A beautiful, functional educational board application
   ═══════════════════════════════════════════════════════════════════════════ */

/* ───────────────────────────────────────────────────────────────────────────
   CSS VARIABLES - Design Tokens
   ─────────────────────────────────────────────────────────────────────────── */
:root {
    /* Typography */
    --font-display: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* Primary Colors - Warm Coral Gradient */
    --color-primary-50: #fff5f5;
    --color-primary-100: #ffe3e3;
    --color-primary-200: #ffc9c9;
    --color-primary-300: #ffa8a8;
    --color-primary-400: #ff8787;
    --color-primary-500: #ff6b6b;
    --color-primary-600: #fa5252;
    --color-primary-700: #f03e3e;
    --color-primary-800: #e03131;
    --color-primary-900: #c92a2a;
    
    /* Secondary Colors - Ocean Blue */
    --color-secondary-50: #e7f5ff;
    --color-secondary-100: #d0ebff;
    --color-secondary-200: #a5d8ff;
    --color-secondary-300: #74c0fc;
    --color-secondary-400: #4dabf7;
    --color-secondary-500: #339af0;
    --color-secondary-600: #228be6;
    --color-secondary-700: #1c7ed6;
    --color-secondary-800: #1971c2;
    --color-secondary-900: #1864ab;
    
    /* Neutral Colors */
    --color-gray-50: #f8f9fa;
    --color-gray-100: #f1f3f5;
    --color-gray-200: #e9ecef;
    --color-gray-300: #dee2e6;
    --color-gray-400: #ced4da;
    --color-gray-500: #adb5bd;
    --color-gray-600: #868e96;
    --color-gray-700: #495057;
    --color-gray-800: #343a40;
    --color-gray-900: #212529;
    
    /* Semantic Colors */
    --color-success: #40c057;
    --color-warning: #fab005;
    --color-danger: #fa5252;
    --color-info: #339af0;
    
    /* Surface Colors */
    --color-surface: #ffffff;
    --color-background: #f8fafc;
    --color-background-alt: #f1f5f9;
    
    /* Shadows */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.08), 0 2px 4px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.1), 0 4px 8px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 24px 48px rgba(0, 0, 0, 0.12), 0 8px 16px rgba(0, 0, 0, 0.06);
    --shadow-glow: 0 0 30px rgba(255, 107, 107, 0.15);
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Spacing */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;
    
    /* Layout */
    --navbar-height: 64px;
    --panel-width: 340px;
    --column-width: 340px;
    --card-height: 220px;
    
    /* Transitions */
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ───────────────────────────────────────────────────────────────────────────
   BASE STYLES
   ─────────────────────────────────────────────────────────────────────────── */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    background: var(--color-background);
    color: var(--color-gray-800);
    line-height: 1.6;
    min-height: 100vh;
    overflow: hidden;
}

a {
    color: var(--color-primary-600);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-700);
}

/* ───────────────────────────────────────────────────────────────────────────
   LOADING SCREEN
   ─────────────────────────────────────────────────────────────────────────── */
.loading-screen {
    position: fixed;
    inset: 0;
    background: linear-gradient(135deg, var(--color-primary-500) 0%, var(--color-secondary-600) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s, visibility 0.5s;
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

.loading-content {
    text-align: center;
    color: white;
}

.loading-logo {
    font-size: 4rem;
    margin-bottom: var(--space-4);
    animation: pulse 2s infinite;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    margin: 0 auto var(--space-4);
    animation: spin 1s linear infinite;
}

.loading-text {
    font-family: var(--font-display);
    font-size: 1.125rem;
    opacity: 0.9;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

/* ───────────────────────────────────────────────────────────────────────────
   AUTH SCREEN
   ─────────────────────────────────────────────────────────────────────────── */
.auth-screen {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9998;
}

.auth-background {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    z-index: -1;
}

.auth-background::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(255, 107, 107, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(51, 154, 240, 0.15) 0%, transparent 50%);
}

.auth-container {
    width: 100%;
    max-width: 420px;
    padding: var(--space-10);
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    animation: slideUp 0.5s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
}

.auth-header {
    text-align: center;
    margin-bottom: var(--space-8);
}

.auth-logo {
    font-size: 3.5rem;
    margin-bottom: var(--space-3);
}

.auth-title {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--space-1);
}

.auth-subtitle {
    color: var(--color-gray-600);
    font-size: 1rem;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.form-group label {
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--color-gray-700);
}

.form-group input {
    padding: var(--space-3) var(--space-4);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: inherit;
    transition: all var(--transition-fast);
    background: var(--color-gray-50);
}

.form-group input:focus {
    outline: none;
    border-color: var(--color-primary-500);
    background: white;
    box-shadow: 0 0 0 4px rgba(255, 107, 107, 0.1);
}

.auth-footer {
    text-align: center;
    margin-top: var(--space-6);
    padding-top: var(--space-6);
    border-top: 1px solid var(--color-gray-200);
    color: var(--color-gray-600);
    font-size: 0.875rem;
}

/* ───────────────────────────────────────────────────────────────────────────
   BUTTONS
   ─────────────────────────────────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary-500) 0%, var(--color-primary-600) 100%);
    color: white;
    box-shadow: 0 2px 8px rgba(255, 107, 107, 0.3);
}

.btn-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--color-primary-600) 0%, var(--color-primary-700) 100%);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(255, 107, 107, 0.4);
}

.btn-secondary {
    background: var(--color-gray-100);
    color: var(--color-gray-700);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--color-gray-200);
}

.btn-ghost {
    background: transparent;
    color: var(--color-gray-700);
}

.btn-ghost:hover:not(:disabled) {
    background: var(--color-gray-100);
}

.btn-danger {
    background: var(--color-danger);
    color: white;
}

.btn-danger:hover:not(:disabled) {
    background: #e03e3e;
}

.btn-block {
    width: 100%;
}

.btn-sm {
    padding: var(--space-2) var(--space-3);
    font-size: 0.8125rem;
}

.btn-icon {
    padding: var(--space-2);
    width: 36px;
    height: 36px;
}

.btn-xs {
    padding: var(--space-1);
    width: 24px;
    height: 24px;
}

.btn-label {
    display: none;
}

@media (min-width: 1024px) {
    .btn-label {
        display: inline;
    }
}

/* ───────────────────────────────────────────────────────────────────────────
   NAVBAR
   ─────────────────────────────────────────────────────────────────────────── */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--navbar-height);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-5);
    z-index: 100;
}

.navbar-start,
.navbar-end {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.navbar-center {
    flex: 1;
    display: flex;
    justify-content: center;
    padding: 0 var(--space-6);
    overflow: hidden;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    text-decoration: none;
}

.brand-icon {
    font-size: 1.75rem;
}

.brand-text {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-gray-900);
}

.btn-add-wall {
    background: var(--color-success);
    color: white;
}

.btn-add-wall:hover {
    background: #2fb344;
}

/* Wall Tabs */
.wall-tabs {
    display: flex;
    gap: var(--space-1);
    background: var(--color-gray-100);
    padding: var(--space-1);
    border-radius: var(--radius-lg);
    max-width: 100%;
    overflow-x: auto;
    scrollbar-width: none;
}

.wall-tabs::-webkit-scrollbar {
    display: none;
}

.wall-tab {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-gray-600);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
    position: relative;
}

.wall-tab:hover {
    background: white;
    color: var(--color-gray-800);
}

.wall-tab.active {
    background: white;
    color: var(--color-primary-600);
    box-shadow: var(--shadow-sm);
}

.wall-tab-actions {
    display: none;
    gap: var(--space-1);
    margin-left: var(--space-1);
}

.wall-tab:hover .wall-tab-actions {
    display: flex;
}

.wall-tab-btn {
    padding: 2px;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    opacity: 0.6;
    transition: all var(--transition-fast);
}

.wall-tab-btn:hover {
    opacity: 1;
    background: var(--color-gray-100);
}

.wall-tab-btn.delete:hover {
    color: var(--color-danger);
}

/* View Toggle */
.view-toggle {
    display: flex;
    background: var(--color-gray-100);
    padding: var(--space-1);
    border-radius: var(--radius-md);
    gap: 2px;
}

.view-btn {
    padding: var(--space-2);
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--color-gray-500);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.view-btn:hover {
    color: var(--color-gray-700);
}

.view-btn.active {
    background: white;
    color: var(--color-primary-600);
    box-shadow: var(--shadow-xs);
}

/* User Menu */
.user-menu {
    position: relative;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--color-primary-400), var(--color-secondary-500));
    border: none;
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.user-avatar:hover {
    transform: scale(1.05);
}

.user-dropdown {
    position: absolute;
    top: calc(100% + var(--space-2));
    right: 0;
    width: 200px;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
    z-index: 200;
}

.user-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-header {
    padding: var(--space-4);
    border-bottom: 1px solid var(--color-gray-100);
}

.dropdown-name {
    display: block;
    font-weight: 600;
    color: var(--color-gray-900);
}

.dropdown-role {
    font-size: 0.75rem;
    color: var(--color-gray-500);
}

.dropdown-divider {
    height: 1px;
    background: var(--color-gray-100);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    width: 100%;
    padding: var(--space-3) var(--space-4);
    background: none;
    border: none;
    font-family: inherit;
    font-size: 0.875rem;
    color: var(--color-gray-700);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.dropdown-item:hover {
    background: var(--color-gray-50);
}

/* ───────────────────────────────────────────────────────────────────────────
   MAIN CONTENT
   ─────────────────────────────────────────────────────────────────────────── */
.main-content {
    display: flex;
    margin-top: var(--navbar-height);
    height: calc(100vh - var(--navbar-height));
    overflow: hidden;
}

/* Admin Panel */
.admin-panel {
    position: fixed;
    top: var(--navbar-height);
    left: 0;
    width: var(--panel-width);
    height: calc(100vh - var(--navbar-height));
    background: white;
    border-right: 1px solid var(--color-gray-200);
    display: flex;
    flex-direction: column;
    z-index: 90;
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
    box-shadow: var(--shadow-lg);
}

.admin-panel.open {
    transform: translateX(0);
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) var(--space-5);
    background: linear-gradient(135deg, var(--color-primary-500), var(--color-primary-600));
    color: white;
}

.panel-title {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
}

.panel-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-4);
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

.panel-section {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.panel-section-grow {
    flex: 1;
    min-height: 200px;
}

.section-title {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-gray-500);
}

.section-actions {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
}

/* Size Controls */
.size-controls {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.size-control {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.size-control label {
    font-size: 0.8125rem;
    color: var(--color-gray-600);
}

.range-wrapper {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.range-wrapper input[type="range"] {
    flex: 1;
    height: 6px;
    -webkit-appearance: none;
    background: var(--color-gray-200);
    border-radius: 3px;
    cursor: pointer;
}

.range-wrapper input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    background: var(--color-primary-500);
    border-radius: 50%;
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.range-wrapper input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.1);
}

.range-value {
    min-width: 50px;
    font-size: 0.75rem;
    color: var(--color-gray-500);
    text-align: right;
}

.size-presets {
    display: flex;
    gap: var(--space-2);
}

.preset-btn {
    flex: 1;
    padding: var(--space-2);
    background: var(--color-gray-100);
    border: 2px solid transparent;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-gray-600);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.preset-btn:hover {
    background: var(--color-gray-200);
}

.preset-btn.active {
    border-color: var(--color-primary-500);
    color: var(--color-primary-600);
    background: var(--color-primary-50);
}

/* Search Box */
.search-box {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    background: var(--color-gray-100);
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    transition: all var(--transition-fast);
}

.search-box:focus-within {
    background: white;
    border-color: var(--color-primary-300);
}

.search-box svg {
    color: var(--color-gray-400);
    flex-shrink: 0;
}

.search-box input {
    flex: 1;
    background: none;
    border: none;
    font-family: inherit;
    font-size: 0.875rem;
    outline: none;
}

/* Resource List */
.resource-list {
    flex: 1;
    overflow-y: auto;
    background: var(--color-gray-50);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-gray-200);
}

.resource-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-8);
    gap: var(--space-3);
    color: var(--color-gray-500);
    font-size: 0.875rem;
}

.spinner-sm {
    width: 24px;
    height: 24px;
    border: 2px solid var(--color-gray-200);
    border-top-color: var(--color-primary-500);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.resource-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3);
    border-bottom: 1px solid var(--color-gray-100);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.resource-item:hover {
    background: white;
}

.resource-item:last-child {
    border-bottom: none;
}

.resource-icon {
    font-size: 1.25rem;
}

.resource-info {
    flex: 1;
    min-width: 0;
}

.resource-name {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-gray-800);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.resource-type {
    font-size: 0.6875rem;
    color: var(--color-gray-500);
}

.resource-add {
    padding: var(--space-1) var(--space-2);
    background: var(--color-success);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    cursor: pointer;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.resource-item:hover .resource-add {
    opacity: 1;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-3);
}

.stat-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--space-3);
    background: var(--color-gray-50);
    border-radius: var(--radius-md);
    text-align: center;
}

.stat-value {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary-600);
}

.stat-label {
    font-size: 0.6875rem;
    color: var(--color-gray-500);
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

/* Panel Overlay */
.panel-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 80;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.panel-overlay.show {
    opacity: 1;
    visibility: visible;
}

/* ───────────────────────────────────────────────────────────────────────────
   WORKSPACE
   ─────────────────────────────────────────────────────────────────────────── */
.workspace {
    flex: 1;
    padding: var(--space-5);
    overflow-x: auto;
    overflow-y: hidden;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    transition: background var(--transition-slow);
    height: calc(100vh - var(--navbar-height));
}

.columns-container {
    display: flex;
    gap: var(--space-5);
    height: 100%;
    align-items: flex-start;
    padding-bottom: var(--space-4);
}

.columns-container.grid-mode {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-5);
    overflow-y: auto;
    align-items: start;
}

/* Column */
.column {
    width: var(--column-width);
    min-width: var(--column-width);
    max-height: calc(100vh - var(--navbar-height) - var(--space-10));
    background: rgba(255, 255, 255, 0.95);
    border-radius: var(--radius-xl);
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.8);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    flex-shrink: 0;
}

.column.drag-over {
    box-shadow: 0 0 0 3px var(--color-primary-400), var(--shadow-lg);
    transform: scale(1.01);
}

/* File drop zone styling */
.column.file-drop-target {
    box-shadow: 0 0 0 3px var(--color-success), var(--shadow-lg);
}

.column.file-drop-target::before {
    content: '📁 Déposez vos fichiers ici';
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(64, 192, 87, 0.9);
    color: white;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-xl);
    z-index: 100;
    pointer-events: none;
}

.grid-mode .column {
    display: contents;
}

.column-header {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-3);
    background: rgba(255, 255, 255, 0.9);
    border-bottom: 1px solid var(--color-gray-100);
    flex-shrink: 0;
    min-width: 0;
    overflow: hidden;
}

.column-title {
    flex: 1;
    min-width: 0;
    background: none;
    border: none;
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-gray-800);
    outline: none;
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast);
    text-overflow: ellipsis;
    overflow: hidden;
    white-space: nowrap;
}

.column-title:hover,
.column-title:focus {
    background: var(--color-gray-100);
}

.column-actions {
    display: flex;
    gap: var(--space-1);
    flex-shrink: 0;
}

.column-btn {
    padding: var(--space-1);
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--color-gray-400);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.8rem;
    line-height: 1;
    flex-shrink: 0;
}

.column-btn:hover {
    background: var(--color-gray-100);
    color: var(--color-gray-600);
}

.column-content {
    flex: 1;
    padding: var(--space-3);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    overflow-y: auto;
    overflow-x: hidden;
    min-height: 100px;
}

/* Scrollbar styling for column content */
.column-content::-webkit-scrollbar {
    width: 6px;
}

.column-content::-webkit-scrollbar-track {
    background: transparent;
    border-radius: 3px;
}

.column-content::-webkit-scrollbar-thumb {
    background: var(--color-gray-300);
    border-radius: 3px;
    transition: background var(--transition-fast);
}

.column-content::-webkit-scrollbar-thumb:hover {
    background: var(--color-gray-400);
}

/* Firefox scrollbar */
.column-content {
    scrollbar-width: thin;
    scrollbar-color: var(--color-gray-300) transparent;
}

.column-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-8);
    text-align: center;
    color: var(--color-gray-400);
    font-size: 0.875rem;
    border: 2px dashed var(--color-gray-200);
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, 0.5);
}

/* ───────────────────────────────────────────────────────────────────────────
   CARDS
   ─────────────────────────────────────────────────────────────────────────── */
.file-card {
    background: white;
    border-radius: var(--radius-lg);
    overflow: visible;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    flex-shrink: 0;
    /* Pour l'effet flip */
    perspective: 1000px;
    /* Animation cascade */
    opacity: 0;
    animation: cardCascade 0.5s ease-out forwards;
    /* Hauteur fixe pour le flip */
    height: calc(var(--card-height) + 90px);
    position: relative;
    /* Transition pour le hover */
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

/* Animation cascade - apparition progressive */
@keyframes cardCascade {
    0% {
        opacity: 0;
        transform: translateY(30px) scale(0.9);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* Délais pour l'effet cascade */
.file-card:nth-child(1) { animation-delay: 0.05s; }
.file-card:nth-child(2) { animation-delay: 0.1s; }
.file-card:nth-child(3) { animation-delay: 0.15s; }
.file-card:nth-child(4) { animation-delay: 0.2s; }
.file-card:nth-child(5) { animation-delay: 0.25s; }
.file-card:nth-child(6) { animation-delay: 0.3s; }
.file-card:nth-child(7) { animation-delay: 0.35s; }
.file-card:nth-child(8) { animation-delay: 0.4s; }
.file-card:nth-child(9) { animation-delay: 0.45s; }
.file-card:nth-child(10) { animation-delay: 0.5s; }
.file-card:nth-child(n+11) { animation-delay: 0.55s; }

/* Effet de rebond au survol - utilise transform au lieu d'animation */
.file-card:hover {
    transform: scale(1.05) translateY(-8px);
    box-shadow: var(--shadow-xl);
    z-index: 10;
}

.file-card.dragging {
    opacity: 0.6;
    transform: rotate(3deg) scale(1.02);
    animation: none;
}

/* Container pour l'effet flip */
.card-inner {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    transform-style: preserve-3d;
}

.file-card.flipped .card-inner {
    transform: rotateY(180deg);
}

/* Face avant et arrière */
.card-front,
.card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.card-front {
    background: white;
    display: flex;
    flex-direction: column;
}

.card-back {
    background: linear-gradient(135deg, var(--color-primary-500), var(--color-secondary-500));
    transform: rotateY(180deg);
    display: flex;
    flex-direction: column;
    padding: var(--space-3);
    color: white;
}

.card-back-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-2);
}

.card-back-title {
    font-weight: 700;
    font-size: 0.875rem;
    line-height: 1.3;
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.card-back-edit-btn {
    width: 24px;
    height: 24px;
    background: rgba(255,255,255,0.2);
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    transition: all var(--transition-fast);
    flex-shrink: 0;
    margin-left: var(--space-2);
}

.card-back-edit-btn:hover {
    background: rgba(255,255,255,0.3);
    transform: scale(1.1);
}

.card-back-comment {
    flex: 1;
    background: rgba(255,255,255,0.15);
    border-radius: var(--radius-md);
    padding: var(--space-2);
    font-size: 0.8125rem;
    line-height: 1.4;
    overflow-y: auto;
    cursor: pointer;
    transition: background var(--transition-fast);
    margin-bottom: var(--space-2);
}

.card-back-comment:hover {
    background: rgba(255,255,255,0.25);
}

.card-back-comment.empty {
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.7);
    font-style: italic;
}

.card-back-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.6875rem;
    opacity: 0.8;
    margin-bottom: var(--space-2);
}

.card-back-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    font-size: 0.8125rem;
}

.card-back-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-2);
    background: rgba(255,255,255,0.15);
    border-radius: var(--radius-sm);
}

.card-back-label {
    opacity: 0.85;
}

.card-back-value {
    font-weight: 600;
}

.card-back-btn {
    padding: var(--space-2) var(--space-3);
    background: white;
    color: var(--color-primary-600);
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.8125rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: center;
}

.card-back-btn:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-md);
}

/* Indicateur de commentaire sur la face avant */
.card-comment-indicator {
    position: absolute;
    bottom: var(--space-2);
    right: var(--space-2);
    background: rgba(255,255,255,0.9);
    width: 24px;
    height: 24px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    box-shadow: var(--shadow-sm);
}

/* Style pour les cartes avec commentaire */
.file-card.has-comment {
    box-shadow: var(--shadow-sm), 0 0 0 2px var(--color-primary-200);
}

/* Textarea pour le commentaire dans le modal */
.comment-textarea {
    resize: vertical;
    min-height: 100px;
}

/* Bouton flip */
.card-flip-btn {
    position: absolute;
    top: var(--space-2);
    right: var(--space-2);
    width: 28px;
    height: 28px;
    background: rgba(255,255,255,0.9);
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    z-index: 5;
    opacity: 0;
    transform: scale(0.8);
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.file-card:hover .card-flip-btn {
    opacity: 1;
    transform: scale(1);
}

.card-flip-btn:hover {
    background: white;
    transform: scale(1.1) rotate(180deg);
}

/* Animation pulse pour les badges */
.card-badge {
    animation: badgePulse 2s ease-in-out infinite;
}

@keyframes badgePulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

/* Animation d'entrée pour les colonnes */
.column {
    animation: columnSlideIn 0.4s ease-out forwards;
    opacity: 0;
}

@keyframes columnSlideIn {
    0% {
        opacity: 0;
        transform: translateX(-20px);
    }
    100% {
        opacity: 1;
        transform: translateX(0);
    }
}

.column:nth-child(1) { animation-delay: 0.1s; }
.column:nth-child(2) { animation-delay: 0.2s; }
.column:nth-child(3) { animation-delay: 0.3s; }
.column:nth-child(4) { animation-delay: 0.4s; }
.column:nth-child(5) { animation-delay: 0.5s; }

.card-thumbnail {
    height: var(--card-height);
    background: var(--color-gray-100);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.file-card:hover .card-thumbnail img {
    transform: scale(1.05);
}

.card-thumbnail-icon {
    font-size: 3rem;
    color: var(--color-gray-400);
}

.card-thumbnail-iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 400%;
    height: 400%;
    transform: scale(0.25);
    transform-origin: 0 0;
    border: none;
    pointer-events: none;
    background: white;
}

.card-body {
    padding: var(--space-3) var(--space-4);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-2);
}

.card-title {
    flex: 1;
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--color-gray-800);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    padding: var(--space-1);
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast);
}

.card-title:hover {
    background: var(--color-gray-100);
}

.card-actions {
    display: flex;
    gap: var(--space-1);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.file-card:hover .card-actions {
    opacity: 1;
}

.card-action-btn {
    padding: var(--space-1);
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--color-gray-400);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.875rem;
}

.card-action-btn:hover {
    background: var(--color-gray-100);
    color: var(--color-gray-600);
}

.card-action-btn.delete:hover {
    background: var(--color-danger);
    color: white;
}

.card-footer {
    padding: var(--space-2) var(--space-4);
    background: var(--color-gray-50);
    font-size: 0.75rem;
    color: var(--color-gray-500);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

/* ───────────────────────────────────────────────────────────────────────────
   EMPTY STATE
   ─────────────────────────────────────────────────────────────────────────── */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--space-12);
    background: rgba(255, 255, 255, 0.9);
    border-radius: var(--radius-xl);
    max-width: 500px;
    margin: auto;
    box-shadow: var(--shadow-lg);
}

.empty-illustration {
    font-size: 5rem;
    margin-bottom: var(--space-4);
    opacity: 0.8;
}

.empty-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-gray-800);
    margin-bottom: var(--space-2);
}

.empty-text {
    color: var(--color-gray-600);
    margin-bottom: var(--space-6);
    max-width: 300px;
}

/* ───────────────────────────────────────────────────────────────────────────
   MODALS
   ─────────────────────────────────────────────────────────────────────────── */
.modal {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal.show {
    opacity: 1;
    visibility: visible;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal-container {
    position: relative;
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    display: flex;
    flex-direction: column;
    margin: var(--space-4);
    transform: scale(0.95) translateY(20px);
    transition: transform var(--transition-normal);
}

.modal.show .modal-container {
    transform: scale(1) translateY(0);
}

.modal-xs { max-width: 360px; }
.modal-sm { max-width: 440px; }
.modal-lg { max-width: 680px; }

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--color-gray-100);
}

.modal-title {
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-gray-900);
}

.modal-body {
    padding: var(--space-5);
    overflow-y: auto;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-5);
    border-top: 1px solid var(--color-gray-100);
    background: var(--color-gray-50);
    border-radius: 0 0 var(--radius-xl) var(--radius-xl);
}

/* Share Modal */
.share-toggle {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-4);
    background: var(--color-gray-50);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-4);
}

.toggle {
    position: relative;
    width: 48px;
    height: 26px;
    flex-shrink: 0;
}

.toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    inset: 0;
    background: var(--color-gray-300);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.toggle-slider::before {
    content: '';
    position: absolute;
    left: 3px;
    top: 3px;
    width: 20px;
    height: 20px;
    background: white;
    border-radius: 50%;
    transition: transform var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.toggle input:checked + .toggle-slider {
    background: var(--color-success);
}

.toggle input:checked + .toggle-slider::before {
    transform: translateX(22px);
}

.toggle-label {
    display: flex;
    flex-direction: column;
}

.toggle-title {
    font-weight: 600;
    color: var(--color-gray-800);
}

.toggle-desc {
    font-size: 0.8125rem;
    color: var(--color-gray-500);
}

/* View Visibility Controls */
.view-visibility-controls {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.view-visibility-item {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-3);
    background: var(--color-gray-50);
    border-radius: var(--radius-md);
}

.share-link-section {
    margin-bottom: var(--space-4);
}

.share-link-section label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-gray-700);
    margin-bottom: var(--space-2);
}

.input-group {
    display: flex;
    gap: var(--space-2);
}

.input-group input {
    flex: 1;
    padding: var(--space-3);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 0.875rem;
    background: var(--color-gray-50);
}

/* File Picker */
.picker-target {
    padding: var(--space-3);
    background: var(--color-gray-100);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-4);
    font-size: 0.875rem;
}

.picker-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: var(--space-3);
    max-height: 400px;
    overflow-y: auto;
}

.picker-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--space-4);
    background: var(--color-gray-50);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: center;
}

.picker-item:hover {
    background: var(--color-gray-100);
}

.picker-item.selected {
    border-color: var(--color-primary-500);
    background: var(--color-primary-50);
}

.picker-icon {
    font-size: 2rem;
    margin-bottom: var(--space-2);
}

.picker-name {
    font-size: 0.75rem;
    word-break: break-word;
    color: var(--color-gray-700);
}

.picker-meta {
    font-size: 0.625rem;
    color: var(--color-gray-500);
    margin-top: var(--space-1);
}

/* Background Modal */
.bg-section {
    margin-bottom: var(--space-5);
}

.bg-section label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-gray-700);
    margin-bottom: var(--space-3);
}

.bg-section input {
    width: 100%;
    padding: var(--space-3);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 0.875rem;
}

.color-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: var(--space-2);
}

.color-option {
    aspect-ratio: 1;
    border-radius: var(--radius-md);
    cursor: pointer;
    border: 3px solid transparent;
    transition: all var(--transition-fast);
    box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.1);
}

.color-option:hover {
    transform: scale(1.1);
}

.color-option.selected {
    border-color: var(--color-primary-500);
    box-shadow: 0 0 0 2px white, 0 0 0 4px var(--color-primary-500);
}

/* Card Options Modal */
.tabs {
    display: flex;
    gap: var(--space-1);
    margin-bottom: var(--space-4);
    border-bottom: 1px solid var(--color-gray-200);
}

.tab {
    padding: var(--space-3) var(--space-4);
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-gray-500);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.tab:hover {
    color: var(--color-gray-700);
}

.tab.active {
    color: var(--color-primary-600);
    border-bottom-color: var(--color-primary-600);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.upload-zone {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-8);
    border: 2px dashed var(--color-gray-300);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-bottom: var(--space-4);
    color: var(--color-gray-500);
}

.upload-zone:hover {
    border-color: var(--color-primary-400);
    background: var(--color-primary-50);
}

.preview-box {
    height: 150px;
    background: var(--color-gray-100);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.preview-box img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.preview-placeholder {
    color: var(--color-gray-400);
    font-size: 0.875rem;
}

.icon-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: var(--space-2);
}

.icon-option {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 48px;
    font-size: 1.5rem;
    background: var(--color-gray-50);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.icon-option:hover {
    background: var(--color-gray-100);
}

.icon-option.selected {
    border-color: var(--color-primary-500);
    background: var(--color-primary-50);
}

/* File Info */
.file-info {
    padding: var(--space-2) var(--space-3);
    background: var(--color-gray-100);
    border-radius: var(--radius-sm);
    font-family: monospace;
    font-size: 0.8125rem;
    color: var(--color-gray-600);
}

/* ───────────────────────────────────────────────────────────────────────────
   TOASTS
   ─────────────────────────────────────────────────────────────────────────── */
.toast-container {
    position: fixed;
    top: calc(var(--navbar-height) + var(--space-4));
    right: var(--space-4);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    z-index: 2000;
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    min-width: 280px;
    max-width: 400px;
    animation: slideInRight 0.3s ease-out;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
}

.toast-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.toast-message {
    flex: 1;
    font-size: 0.875rem;
    color: var(--color-gray-700);
}

.toast.success {
    border-left: 4px solid var(--color-success);
}

.toast.error {
    border-left: 4px solid var(--color-danger);
}

.toast.warning {
    border-left: 4px solid var(--color-warning);
}

.toast.info {
    border-left: 4px solid var(--color-info);
}

/* ───────────────────────────────────────────────────────────────────────────
   RESPONSIVE
   ─────────────────────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
    .navbar {
        padding: 0 var(--space-3);
    }
    
    .brand-text,
    .btn-label {
        display: none !important;
    }
    
    .wall-tabs {
        max-width: 200px;
    }
    
    .admin-panel {
        width: 100%;
    }
    
    .workspace {
        padding: var(--space-3);
    }
    
    .columns-container {
        flex-direction: column;
        align-items: stretch;
    }
    
    .column {
        width: 100%;
        min-width: auto;
        max-width: none;
    }
    
    .modal-container {
        margin: var(--space-2);
        border-radius: var(--radius-lg);
    }
}

@media (min-width: 1280px) {
    .admin-panel {
        position: relative;
        transform: none;
        top: 0;
        box-shadow: none;
        border-right: 1px solid var(--color-gray-200);
    }
    
    .admin-panel:not(.open) {
        width: 0;
        padding: 0;
        overflow: hidden;
        border: none;
    }
    
    .panel-overlay {
        display: none;
    }
}

/* ───────────────────────────────────────────────────────────────────────────
   BADGES SYSTEM
   ─────────────────────────────────────────────────────────────────────────── */

/* ───────────────────────────────────────────────────────────────────────────
   GAMEBOARD VIEW
   ─────────────────────────────────────────────────────────────────────────── */

.gameboard-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--space-6);
    min-height: 100%;
    width: 100%;
}

.gameboard-title {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-gray-800);
    margin-bottom: var(--space-6);
    text-align: center;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
}

.gameboard-path {
    position: relative;
    width: 100%;
    min-height: 600px;
    background: 
        linear-gradient(90deg, var(--color-gray-200) 1px, transparent 1px),
        linear-gradient(var(--color-gray-200) 1px, transparent 1px);
    background-size: 50px 50px;
    border-radius: var(--radius-xl);
    border: 2px dashed var(--color-gray-300);
}

/* SVG pour les lignes de connexion */
.gameboard-connections {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.gameboard-connections line {
    stroke: var(--color-primary-400);
    stroke-width: 4;
    stroke-linecap: round;
    stroke-dasharray: 8 4;
    opacity: 0.6;
}

.gameboard-step {
    position: absolute;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 160px;
    cursor: grab;
    transition: box-shadow var(--transition-fast);
}

.gameboard-step:active {
    cursor: grabbing;
}

.gameboard-step.dragging {
    z-index: 100;
    opacity: 0.9;
    box-shadow: var(--shadow-xl);
}

.gameboard-step:hover {
    z-index: 10;
}

.step-number {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary-500), var(--color-primary-600));
    color: white;
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg), 0 0 0 4px white;
    margin-bottom: var(--space-3);
    position: relative;
    z-index: 2;
}

.gameboard-step.locked .step-number {
    background: linear-gradient(135deg, var(--color-gray-400), var(--color-gray-500));
}

.gameboard-step.completed .step-number {
    background: linear-gradient(135deg, var(--color-success), #059669);
}

.gameboard-step.completed .step-number::after {
    content: '✓';
    position: absolute;
    font-size: 1rem;
}

.step-card {
    width: 100%;
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    cursor: pointer;
    transition: all var(--transition-base);
    border: 3px solid transparent;
}

.step-card:hover {
    box-shadow: var(--shadow-xl);
    border-color: var(--color-primary-300);
}

.gameboard-step.locked .step-card {
    opacity: 0.6;
    filter: grayscale(50%);
    cursor: not-allowed;
}

.gameboard-step.locked .step-card::after {
    content: '🔒';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 2rem;
    z-index: 10;
}

.step-card-thumbnail {
    height: 100px;
    background: var(--color-gray-100);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

.step-card-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.step-card-thumbnail .card-thumbnail-icon {
    font-size: 2.5rem;
}

.step-card-body {
    padding: var(--space-3);
    text-align: center;
}

.step-card-title {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--color-gray-800);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Case vide dans le plateau */
.step-empty {
    width: 100%;
    height: 140px;
    background: var(--color-gray-100);
    border: 3px dashed var(--color-gray-300);
    border-radius: var(--radius-xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    color: var(--color-gray-500);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-base);
}

.step-empty:hover {
    border-color: var(--color-primary-400);
    background: var(--color-primary-50);
    color: var(--color-primary-600);
}

.step-empty-icon {
    font-size: 1.5rem;
}

/* Admin controls for gameboard */
.step-admin-controls {
    display: flex;
    gap: var(--space-1);
    margin-top: var(--space-2);
}

.step-admin-btn {
    padding: var(--space-1) var(--space-2);
    background: var(--color-gray-100);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.step-admin-btn:hover {
    background: var(--color-gray-200);
}

.step-admin-btn.delete:hover {
    background: var(--color-danger);
    color: white;
    border-color: var(--color-danger);
}

/* Gameboard add step button */
.gameboard-add-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 180px;
}

.add-step-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: white;
    border: 3px dashed var(--color-gray-300);
    color: var(--color-gray-400);
    font-size: 1.5rem;
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
}

.add-step-btn:hover {
    border-color: var(--color-primary-400);
    color: var(--color-primary-500);
    background: var(--color-primary-50);
    transform: scale(1.1);
}

/* Drop zone for gameboard steps */
.gameboard-step.drop-target .step-card,
.gameboard-step.drop-target .step-empty {
    border-color: var(--color-primary-500);
    background: var(--color-primary-50);
    box-shadow: 0 0 0 4px var(--color-primary-200);
}

/* Responsive gameboard */
@media (max-width: 768px) {
    .gameboard-step {
        width: 140px;
    }
    
    .step-number {
        width: 40px;
        height: 40px;
        font-size: 1.25rem;
    }
    
    .step-card-thumbnail {
        height: 80px;
    }
}

/* ───────────────────────────────────────────────────────────────────────────
   GAMIFICATION VIEW
   ─────────────────────────────────────────────────────────────────────────── */

.gamification-container {
    padding: var(--space-6);
    min-height: 100%;
}

/* Score Header */
.gamification-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-4) var(--space-6);
    background: linear-gradient(135deg, var(--color-primary-500), var(--color-secondary-500));
    border-radius: var(--radius-xl);
    color: white;
    margin-bottom: var(--space-6);
    box-shadow: var(--shadow-lg);
}

.gamification-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
}

.gamification-score {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.score-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    background: rgba(255,255,255,0.2);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
    font-weight: 600;
}

.score-icon {
    font-size: 1.25rem;
}

.score-value {
    font-size: 1.125rem;
}

/* Cards Grid */
.gamification-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: var(--space-5);
}

/* Base Game Card */
.game-card {
    position: relative;
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: all var(--transition-base);
    cursor: pointer;
}

.game-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

/* Card Type Badge */
.game-card-type {
    position: absolute;
    top: var(--space-2);
    right: var(--space-2);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    z-index: 5;
}

.game-card-type.treasure {
    background: linear-gradient(135deg, #ffd700, #ffaa00);
    color: #8B4513;
}

.game-card-type.mystery {
    background: linear-gradient(135deg, #9333ea, #7c3aed);
    color: white;
}

.game-card-type.puzzle {
    background: linear-gradient(135deg, #06b6d4, #0891b2);
    color: white;
}

.game-card-type.quiz {
    background: linear-gradient(135deg, #f97316, #ea580c);
    color: white;
}

.game-card-type.normal {
    background: var(--color-gray-200);
    color: var(--color-gray-700);
}

/* Treasure Card */
.game-card.treasure {
    background: linear-gradient(135deg, #fef3c7, #fde68a);
    border: 3px solid #fbbf24;
}

.game-card.treasure .game-card-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 180px;
    text-align: center;
}

.treasure-icon {
    font-size: 4rem;
    animation: float 2s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.treasure-label {
    font-weight: 600;
    color: #92400e;
    margin-top: var(--space-2);
}

.game-card.treasure.found {
    background: linear-gradient(135deg, #d1fae5, #a7f3d0);
    border-color: #34d399;
}

.game-card.treasure.found .treasure-icon {
    animation: none;
}

/* Mystery Card (Scratch) */
.game-card.mystery {
    background: linear-gradient(135deg, #ede9fe, #ddd6fe);
    border: 3px solid #8b5cf6;
}

.mystery-scratch-area {
    position: relative;
    height: 180px;
    overflow: hidden;
}

.mystery-content {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
}

.mystery-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #7c3aed, #6d28d9);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
    cursor: crosshair;
    transition: opacity 0.5s ease;
}

.mystery-overlay.scratched {
    opacity: 0;
    pointer-events: none;
}

.mystery-overlay-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-2);
}

.mystery-overlay-text {
    font-size: 0.875rem;
    opacity: 0.9;
}

/* Puzzle Card */
.game-card.puzzle {
    background: linear-gradient(135deg, #e0f2fe, #bae6fd);
    border: 3px solid #38bdf8;
}

.puzzle-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2px;
    height: 180px;
    padding: var(--space-2);
    background: #0e7490;
}

.puzzle-piece {
    background: var(--color-gray-300);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    color: var(--color-gray-600);
    cursor: pointer;
    transition: all var(--transition-fast);
    overflow: hidden;
}

.puzzle-piece.revealed {
    background-size: 300% 300%;
}

.puzzle-piece:hover:not(.revealed) {
    background: var(--color-gray-400);
}

.game-card.puzzle.completed .puzzle-grid {
    gap: 0;
}

/* Quiz Card */
.game-card.quiz {
    background: linear-gradient(135deg, #ffedd5, #fed7aa);
    border: 3px solid #fb923c;
}

.quiz-content {
    padding: var(--space-4);
    min-height: 180px;
    display: flex;
    flex-direction: column;
}

.quiz-question {
    font-weight: 600;
    color: var(--color-gray-800);
    margin-bottom: var(--space-3);
    flex: 1;
}

.quiz-answer-area {
    position: relative;
}

.quiz-answer {
    padding: var(--space-3);
    background: white;
    border-radius: var(--radius-md);
    text-align: center;
    font-weight: 500;
    color: var(--color-success);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.quiz-answer.revealed {
    opacity: 1;
}

.quiz-reveal-btn {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #ea580c, #c2410c);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 600;
    transition: all var(--transition-base);
}

.quiz-reveal-btn:hover {
    transform: scale(1.02);
}

.quiz-reveal-btn.hidden {
    opacity: 0;
    pointer-events: none;
}

/* Normal Card in Gamification */
.game-card.normal .game-card-thumbnail {
    height: 120px;
    background: var(--color-gray-100);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.game-card.normal .game-card-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.game-card.normal .game-card-body {
    padding: var(--space-3);
}

.game-card.normal .game-card-title {
    font-weight: 600;
    color: var(--color-gray-800);
    margin-bottom: var(--space-1);
}

.game-card.normal .game-card-points {
    font-size: 0.75rem;
    color: var(--color-primary-500);
    font-weight: 600;
}

/* Locked Card */
.game-card.locked {
    filter: grayscale(80%);
    opacity: 0.7;
}

.game-card.locked::after {
    content: '🔒';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 2rem;
    z-index: 10;
}

/* Card Footer */
.game-card-footer {
    padding: var(--space-2) var(--space-3);
    background: var(--color-gray-50);
    border-top: 1px solid var(--color-gray-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.game-card-points-badge {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-primary-600);
}

.game-card-status {
    font-size: 0.75rem;
    color: var(--color-gray-500);
}

.game-card-status.completed {
    color: var(--color-success);
}

/* Admin Controls for Game Cards */
.game-card-admin {
    position: absolute;
    top: var(--space-2);
    left: var(--space-2);
    display: flex;
    gap: var(--space-1);
    z-index: 10;
}

.game-card-admin-btn {
    width: 28px;
    height: 28px;
    border-radius: var(--radius-full);
    background: white;
    border: 1px solid var(--color-gray-300);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.game-card-admin-btn:hover {
    background: var(--color-gray-100);
    transform: scale(1.1);
}

/* Gamification Config Modal */
.game-type-selector {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

.game-type-option {
    padding: var(--space-4);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    cursor: pointer;
    text-align: center;
    transition: all var(--transition-fast);
}

.game-type-option:hover {
    border-color: var(--color-primary-300);
    background: var(--color-primary-50);
}

.game-type-option.selected {
    border-color: var(--color-primary-500);
    background: var(--color-primary-50);
}

.game-type-icon {
    font-size: 2rem;
    margin-bottom: var(--space-2);
}

.game-type-label {
    font-weight: 600;
    color: var(--color-gray-700);
}

/* Confetti Animation */
@keyframes confetti-fall {
    0% { transform: translateY(-100%) rotate(0deg); opacity: 1; }
    100% { transform: translateY(100vh) rotate(720deg); opacity: 0; }
}

.confetti {
    position: fixed;
    width: 10px;
    height: 10px;
    top: -10px;
    z-index: 9999;
    animation: confetti-fall 3s linear forwards;
}

/* Badges Container in Admin Panel */
.badges-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.badges-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    min-height: 36px;
    padding: var(--space-2);
    background: var(--color-gray-50);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-gray-200);
}

.badges-hint {
    font-size: 0.75rem;
    color: var(--color-gray-500);
    text-align: center;
    margin: 0;
}

/* Badge Item */
.badge-item {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    cursor: grab;
    transition: all var(--transition-fast);
    user-select: none;
    white-space: nowrap;
}

.badge-item:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

.badge-item:active {
    cursor: grabbing;
}

.badge-item.dragging {
    opacity: 0.8;
    transform: scale(1.1) rotate(5deg);
    box-shadow: var(--shadow-lg);
}

.badge-item .badge-icon {
    font-size: 0.875rem;
}

.badge-item .badge-edit {
    opacity: 0;
    margin-left: var(--space-1);
    padding: 2px;
    background: rgba(255, 255, 255, 0.3);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 0.625rem;
    line-height: 1;
    transition: opacity var(--transition-fast);
}

.badge-item:hover .badge-edit {
    opacity: 1;
}

/* Badges on Cards */
.card-badges {
    position: absolute;
    top: var(--space-2);
    left: var(--space-2);
    right: var(--space-2);
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-1);
    z-index: 5;
}

.card-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    font-weight: 600;
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(4px);
}

.card-badge .badge-remove {
    display: none;
    margin-left: 4px;
    padding: 0;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 0.75rem;
    opacity: 0.7;
    line-height: 1;
}

.card-badge .badge-remove:hover {
    opacity: 1;
}

/* Show remove button only in admin */
.file-card:hover .card-badge .badge-remove {
    display: inline;
}

/* Make card thumbnail relative for badge positioning */
.card-thumbnail {
    position: relative;
}

/* Card drop zone for badges */
.file-card.badge-drop-target {
    outline: 3px dashed var(--color-primary-400);
    outline-offset: -3px;
}

.file-card.badge-drop-target::after {
    content: '🏷️ Déposez le badge';
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.9);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-primary-600);
    border-radius: var(--radius-lg);
    z-index: 10;
}

/* Badge Modal */
.badge-preview-container {
    display: flex;
    justify-content: center;
    padding: var(--space-4);
    margin-bottom: var(--space-4);
    background: var(--color-gray-100);
    border-radius: var(--radius-md);
}

.badge-preview {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
    font-size: 1rem;
    font-weight: 600;
    transition: all var(--transition-fast);
}

.badge-icon-grid {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: var(--space-1);
}

.badge-icon-option {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 36px;
    font-size: 1.25rem;
    background: var(--color-gray-50);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.badge-icon-option:hover {
    background: var(--color-gray-100);
}

.badge-icon-option.selected {
    border-color: var(--color-primary-500);
    background: var(--color-primary-50);
}

.badge-color-grid {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: var(--space-1);
}

.badge-color-option {
    aspect-ratio: 1;
    border-radius: var(--radius-md);
    cursor: pointer;
    border: 3px solid transparent;
    transition: all var(--transition-fast);
}

.badge-color-option:hover {
    transform: scale(1.1);
}

.badge-color-option.selected {
    border-color: var(--color-gray-800);
    box-shadow: 0 0 0 2px white;
}

/* Empty badges state */
.badges-list:empty::after {
    content: 'Aucun badge créé';
    display: block;
    width: 100%;
    text-align: center;
    color: var(--color-gray-400);
    font-size: 0.75rem;
    padding: var(--space-2);
}

/* ───────────────────────────────────────────────────────────────────────────
   RESPONSIVE - MOBILE ADAPTATIONS
   ─────────────────────────────────────────────────────────────────────────── */

/* Tablettes et smartphones */
@media (max-width: 768px) {
    /* Colonnes en affichage vertical sur mobile */
    .columns-container {
        flex-direction: column !important;
        gap: var(--space-4);
        overflow-x: hidden;
        overflow-y: auto;
    }
    
    .column {
        width: 100% !important;
        min-width: unset !important;
        max-width: 100% !important;
    }
    
    /* Public view columns responsive */
    .public-columns {
        flex-direction: column !important;
        gap: var(--space-4);
        padding: var(--space-3);
    }
    
    /* Ajuster la navbar pour mobile */
    .navbar {
        flex-wrap: wrap;
        height: auto;
        min-height: var(--navbar-height);
        padding: var(--space-2) var(--space-3);
    }
    
    .navbar-center {
        order: 3;
        width: 100%;
        margin-top: var(--space-2);
    }
    
    .wall-tabs {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    /* Masquer les labels des boutons sur mobile */
    .btn-label {
        display: none;
    }
    
    /* Panneau d'administration en plein écran sur mobile */
    .admin-panel {
        width: 100%;
        max-width: 100%;
    }
    
    /* Workspace padding réduit sur mobile */
    .workspace {
        padding: var(--space-3);
    }
    
    /* Grille de fichiers plus compacte sur mobile */
    .columns-container.grid-mode {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }
    
    /* Modales en plein écran sur mobile */
    .modal-container {
        width: 95%;
        max-width: 95%;
        max-height: 90vh;
    }
    
    .modal-container.modal-lg {
        width: 95%;
    }
}

/* Smartphones en mode portrait */
@media (max-width: 480px) {
    :root {
        --column-width: 100%;
        --card-height: 180px;
    }
    
    .columns-container.grid-mode {
        grid-template-columns: 1fr;
    }
    
    /* Toggle de vue plus compact */
    .view-toggle {
        gap: var(--space-1);
    }
    
    .view-btn {
        padding: var(--space-2);
    }
    
    /* Stats en une seule colonne */
    .stats-grid {
        grid-template-columns: 1fr;
    }
}

/* ───────────────────────────────────────────────────────────────────────────
   ADD COLUMN BUTTON
   ─────────────────────────────────────────────────────────────────────────── */

/* Bouton d'ajout de colonne */
.add-column-btn {
    min-width: 60px;
    width: 60px;
    height: 100%;
    min-height: 200px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    border: 2px dashed var(--color-gray-300);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
    color: var(--color-gray-500);
    flex-shrink: 0;
}

.add-column-btn:hover {
    background: rgba(255, 255, 255, 0.95);
    border-color: var(--color-primary-400);
    color: var(--color-primary-600);
    transform: scale(1.02);
    box-shadow: var(--shadow-md);
}

.add-column-btn svg {
    width: 32px;
    height: 32px;
}

.add-column-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-align: center;
    writing-mode: vertical-rl;
    text-orientation: mixed;
}

@media (max-width: 768px) {
    .add-column-btn {
        width: 100%;
        height: 80px;
        min-height: 80px;
        flex-direction: row;
    }
    
    .add-column-label {
        writing-mode: horizontal-tb;
        text-orientation: unset;
    }
}


/* ═══════════════════════════════════════════════════════════════════════════
   EDUPAD - AMÉLIORATIONS PREMIUM
   Les 5 meilleures améliorations pour colonnes et cartes
   À ajouter à la fin de votre main.css
   ═══════════════════════════════════════════════════════════════════════════ */

/* ───────────────────────────────────────────────────────────────────────────
   1. HEADER DE COLONNE AMÉLIORÉ AVEC COMPTEUR
   ─────────────────────────────────────────────────────────────────────────── */

.column-header {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-4);
    background: linear-gradient(135deg, rgba(255,255,255,0.95), rgba(248,250,252,0.95));
    border-bottom: 2px solid var(--color-gray-100);
    flex-shrink: 0;
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    min-width: 0;
    overflow: hidden;
}

.column-title-wrapper {
    flex: 1;
    display: flex;
    align-items: center;
    gap: var(--space-2);
    min-width: 0;
}

.column-title {
    flex: 1;
    min-width: 0;
    background: none;
    border: none;
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-gray-900);
    outline: none;
    padding: var(--space-2);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    text-overflow: ellipsis;
    overflow: hidden;
    white-space: nowrap;
}

.column-title:hover,
.column-title:focus {
    background: rgba(0, 0, 0, 0.03);
}

.column-card-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 24px;
    height: 24px;
    padding: 0 var(--space-2);
    background: var(--color-primary-100);
    color: var(--color-primary-700);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    flex-shrink: 0;
    animation: countUp 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.column-card-count.empty {
    background: var(--color-gray-100);
    color: var(--color-gray-500);
}

@keyframes countUp {
    0% { 
        transform: translateY(10px) scale(0.8);
        opacity: 0;
    }
    50% { 
        transform: translateY(-2px) scale(1.1);
        opacity: 1;
    }
    100% { 
        transform: translateY(0) scale(1);
        opacity: 1;
    }
}

/* ───────────────────────────────────────────────────────────────────────────
   2. CARTES AVEC EFFET PARALLAXE
   ─────────────────────────────────────────────────────────────────────────── */

.card-thumbnail {
    position: relative;
    height: var(--card-height);
    overflow: hidden;
    background: var(--color-gray-100);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.card-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.file-card:hover .card-thumbnail img {
    transform: scale(1.1);
}

/* Overlay au survol pour améliorer la lisibilité des éléments superposés */
.card-thumbnail::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, transparent 50%, rgba(0,0,0,0.1));
    opacity: 0;
    transition: opacity var(--transition-normal);
    pointer-events: none;
}

.file-card:hover .card-thumbnail::after {
    opacity: 1;
}

/* ───────────────────────────────────────────────────────────────────────────
   3. QUICK ACTIONS AU SURVOL
   ─────────────────────────────────────────────────────────────────────────── */

.card-quick-actions {
    position: absolute;
    bottom: var(--space-4);
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    display: flex;
    gap: var(--space-1);
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(10px);
    padding: var(--space-1);
    border-radius: var(--radius-full);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 15;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
}

.file-card:hover .card-quick-actions {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.quick-action-btn {
    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: var(--radius-full);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    font-size: 1rem;
}

.quick-action-btn:hover {
    background: white;
    color: var(--color-gray-900);
    transform: scale(1.15);
}

.quick-action-btn:active {
    transform: scale(0.95);
}

/* Tooltips pour les boutons */
.quick-action-btn[data-tooltip]::before {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + var(--space-2));
    left: 50%;
    transform: translateX(-50%);
    padding: var(--space-1) var(--space-2);
    background: rgba(0, 0, 0, 0.9);
    color: white;
    font-size: 0.7rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
    pointer-events: none;
}

.quick-action-btn:hover::before {
    opacity: 1;
    visibility: visible;
}

/* ───────────────────────────────────────────────────────────────────────────
   4. GLASSMORPHISM POUR COLONNES
   ─────────────────────────────────────────────────────────────────────────── */

.column {
    width: var(--column-width);
    min-width: var(--column-width);
    max-height: calc(100vh - var(--navbar-height) - var(--space-10));
    background: rgba(255, 255, 255, 0.75);
    border-radius: var(--radius-xl);
    display: flex;
    flex-direction: column;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.6);
    transition: all var(--transition-normal);
    flex-shrink: 0;
}

.column:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.12);
    border-color: rgba(255, 255, 255, 0.8);
}

/* Amélioration du drag over */
.column.drag-over {
    box-shadow: 0 0 0 3px var(--color-primary-400), 0 12px 48px rgba(99, 102, 241, 0.25);
    transform: scale(1.02);
    background: rgba(255, 255, 255, 0.9);
}

/* ───────────────────────────────────────────────────────────────────────────
   5. INDICATEURS DE TYPE DE FICHIER
   ─────────────────────────────────────────────────────────────────────────── */

.card-type-badge {
    position: absolute;
    top: var(--space-2);
    left: var(--space-2);
    display: flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-2);
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-full);
    color: white;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    z-index: 5;
    opacity: 0;
    transform: translateX(-10px);
    transition: all var(--transition-normal);
}

.file-card:hover .card-type-badge {
    opacity: 1;
    transform: translateX(0);
}

/* Couleurs par type de fichier */
.card-type-badge.type-pdf { 
    background: linear-gradient(135deg, rgba(220, 38, 38, 0.9), rgba(185, 28, 28, 0.9)); 
}

.card-type-badge.type-image { 
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.9), rgba(37, 99, 235, 0.9)); 
}

.card-type-badge.type-video { 
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.9), rgba(124, 58, 237, 0.9)); 
}

.card-type-badge.type-audio { 
    background: linear-gradient(135deg, rgba(34, 197, 94, 0.9), rgba(22, 163, 74, 0.9)); 
}

.card-type-badge.type-html { 
    background: linear-gradient(135deg, rgba(249, 115, 22, 0.9), rgba(234, 88, 12, 0.9)); 
}

.card-type-badge.type-archive { 
    background: linear-gradient(135deg, rgba(168, 85, 247, 0.9), rgba(147, 51, 234, 0.9)); 
}

.card-type-icon {
    font-size: 0.875rem;
}

/* ───────────────────────────────────────────────────────────────────────────
   BONUS: AMÉLIORATIONS SUPPLÉMENTAIRES
   ─────────────────────────────────────────────────────────────────────────── */

/* Amélioration du footer de carte */
.card-footer {
    padding: var(--space-3);
    background: linear-gradient(to bottom, rgba(248, 250, 252, 0.8), rgba(241, 245, 249, 0.9));
    border-top: 1px solid var(--color-gray-100);
    backdrop-filter: blur(10px);
}

.card-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-gray-900);
    margin-bottom: var(--space-1);
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    line-height: 1.4;
    transition: color var(--transition-fast);
}

.file-card:hover .card-title {
    color: var(--color-primary-600);
}

/* Effet de brillance subtil au survol */
.file-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 50%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.4),
        transparent
    );
    transition: left 0.7s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 10;
    pointer-events: none;
    border-radius: var(--radius-lg);
}

.file-card:hover::before {
    left: 100%;
}

/* Amélioration du scroll dans les colonnes */
.column-content::-webkit-scrollbar {
    width: 8px;
}

.column-content::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.03);
    border-radius: 4px;
    margin: var(--space-2) 0;
}

.column-content::-webkit-scrollbar-thumb {
    background: var(--color-gray-300);
    border-radius: 4px;
    transition: background var(--transition-fast);
}

.column-content::-webkit-scrollbar-thumb:hover {
    background: var(--color-gray-400);
}

/* Indicateur de scroll */
.column-content::before {
    content: '';
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
    height: 20px;
    background: linear-gradient(to bottom, rgba(255,255,255,0.9), transparent);
    z-index: 1;
    opacity: 0;
    transition: opacity var(--transition-fast);
    pointer-events: none;
    margin: calc(var(--space-3) * -1) calc(var(--space-3) * -1) 0;
}

.column-content.scrolled::before {
    opacity: 1;
}

/* Animation améliorée pour les cartes */
@keyframes cardEnhancedCascade {
    0% {
        opacity: 0;
        transform: translateY(40px) scale(0.9) rotateX(10deg);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1) rotateX(0deg);
    }
}

.file-card {
    animation: cardEnhancedCascade 0.6s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

/* Badge avec pulse amélioré */
.card-badge {
    animation: badgeEnhancedPulse 3s ease-in-out infinite;
}

@keyframes badgeEnhancedPulse {
    0%, 100% { 
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(99, 102, 241, 0.4);
    }
    50% { 
        transform: scale(1.05);
        box-shadow: 0 0 0 4px rgba(99, 102, 241, 0);
    }
}

/* Amélioration de l'empty state */
.column-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-10) var(--space-4);
    text-align: center;
    color: var(--color-gray-400);
    font-size: 0.875rem;
    border: 2px dashed var(--color-gray-200);
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(5px);
    transition: all var(--transition-normal);
}

.column-empty:hover {
    border-color: var(--color-primary-300);
    color: var(--color-primary-600);
    background: rgba(255, 255, 255, 0.8);
}

/* ───────────────────────────────────────────────────────────────────────────
   RESPONSIVE - Ajustements pour mobile
   ─────────────────────────────────────────────────────────────────────────── */

@media (max-width: 768px) {
    .column-header {
        padding: var(--space-3);
    }
    
    .column-title {
        font-size: 0.9rem;
    }
    
    .card-quick-actions {
        /* Sur mobile, toujours visible en bas */
        opacity: 1;
        visibility: visible;
        transform: translateX(-50%) translateY(0);
        position: relative;
        bottom: 0;
        left: 0;
        transform: none;
        margin-top: var(--space-2);
        width: 100%;
        justify-content: center;
    }
    
    .quick-action-btn {
        width: 40px;
        height: 40px;
    }
}



/* ═══════════════════════════════════════════════════════════════════════════
   EDUPAD - SYSTÈME DE THÈMES
   Thèmes pour colonnes et fonds de tableau
   ═══════════════════════════════════════════════════════════════════════════ */

/* ───────────────────────────────────────────────────────────────────────────
   THÈMES DE COLONNES
   ─────────────────────────────────────────────────────────────────────────── */

/* THÈME PAR DÉFAUT */
.column.theme-default {
    background: rgba(255, 255, 255, 0.75);
    border: 1px solid rgba(255, 255, 255, 0.6);
}

.column.theme-default .column-header {
    background: linear-gradient(135deg, rgba(255,255,255,0.95), rgba(248,250,252,0.95));
    border-bottom: 2px solid var(--color-gray-100);
}

/* THÈME OCÉAN - Bleu apaisant */
.column.theme-ocean {
    background: linear-gradient(135deg, rgba(219, 234, 254, 0.85), rgba(191, 219, 254, 0.85));
    border: 1px solid rgba(96, 165, 250, 0.4);
    box-shadow: 0 8px 32px rgba(59, 130, 246, 0.15);
}

.column.theme-ocean .column-header {
    background: linear-gradient(135deg, rgba(147, 197, 253, 0.9), rgba(59, 130, 246, 0.2));
    border-bottom: 2px solid rgba(59, 130, 246, 0.3);
}

.column.theme-ocean .column-title {
    color: #1e40af;
}

.column.theme-ocean .column-card-count {
    background: rgba(59, 130, 246, 0.2);
    color: #1e40af;
}

/* THÈME FORÊT - Vert naturel */
.column.theme-forest {
    background: linear-gradient(135deg, rgba(220, 252, 231, 0.85), rgba(187, 247, 208, 0.85));
    border: 1px solid rgba(74, 222, 128, 0.4);
    box-shadow: 0 8px 32px rgba(34, 197, 94, 0.15);
}

.column.theme-forest .column-header {
    background: linear-gradient(135deg, rgba(134, 239, 172, 0.9), rgba(34, 197, 94, 0.2));
    border-bottom: 2px solid rgba(34, 197, 94, 0.3);
}

.column.theme-forest .column-title {
    color: #166534;
}

.column.theme-forest .column-card-count {
    background: rgba(34, 197, 94, 0.2);
    color: #166534;
}

/* THÈME COUCHER DE SOLEIL - Orange chaleureux */
.column.theme-sunset {
    background: linear-gradient(135deg, rgba(254, 243, 199, 0.85), rgba(253, 186, 116, 0.85));
    border: 1px solid rgba(251, 146, 60, 0.4);
    box-shadow: 0 8px 32px rgba(249, 115, 22, 0.15);
}

.column.theme-sunset .column-header {
    background: linear-gradient(135deg, rgba(254, 215, 170, 0.9), rgba(249, 115, 22, 0.2));
    border-bottom: 2px solid rgba(249, 115, 22, 0.3);
}

.column.theme-sunset .column-title {
    color: #9a3412;
}

.column.theme-sunset .column-card-count {
    background: rgba(249, 115, 22, 0.2);
    color: #9a3412;
}

/* THÈME LAVANDE - Violet doux */
.column.theme-lavender {
    background: linear-gradient(135deg, rgba(243, 232, 255, 0.85), rgba(233, 213, 255, 0.85));
    border: 1px solid rgba(168, 85, 247, 0.4);
    box-shadow: 0 8px 32px rgba(147, 51, 234, 0.15);
}

.column.theme-lavender .column-header {
    background: linear-gradient(135deg, rgba(216, 180, 254, 0.9), rgba(147, 51, 234, 0.2));
    border-bottom: 2px solid rgba(147, 51, 234, 0.3);
}

.column.theme-lavender .column-title {
    color: #6b21a8;
}

.column.theme-lavender .column-card-count {
    background: rgba(147, 51, 234, 0.2);
    color: #6b21a8;
}

/* THÈME ROSE - Rose romantique */
.column.theme-rose {
    background: linear-gradient(135deg, rgba(252, 231, 243, 0.85), rgba(249, 168, 212, 0.85));
    border: 1px solid rgba(236, 72, 153, 0.4);
    box-shadow: 0 8px 32px rgba(219, 39, 119, 0.15);
}

.column.theme-rose .column-header {
    background: linear-gradient(135deg, rgba(251, 207, 232, 0.9), rgba(219, 39, 119, 0.2));
    border-bottom: 2px solid rgba(219, 39, 119, 0.3);
}

.column.theme-rose .column-title {
    color: #9f1239;
}

.column.theme-rose .column-card-count {
    background: rgba(219, 39, 119, 0.2);
    color: #9f1239;
}

/* THÈME MENTHE - Vert menthe frais */
.column.theme-mint {
    background: linear-gradient(135deg, rgba(204, 251, 241, 0.85), rgba(153, 246, 228, 0.85));
    border: 1px solid rgba(20, 184, 166, 0.4);
    box-shadow: 0 8px 32px rgba(13, 148, 136, 0.15);
}

.column.theme-mint .column-header {
    background: linear-gradient(135deg, rgba(153, 246, 228, 0.9), rgba(13, 148, 136, 0.2));
    border-bottom: 2px solid rgba(13, 148, 136, 0.3);
}

.column.theme-mint .column-title {
    color: #134e4a;
}

.column.theme-mint .column-card-count {
    background: rgba(13, 148, 136, 0.2);
    color: #134e4a;
}

/* THÈME CORAIL - Corail vibrant */
.column.theme-coral {
    background: linear-gradient(135deg, rgba(254, 226, 226, 0.85), rgba(252, 165, 165, 0.85));
    border: 1px solid rgba(248, 113, 113, 0.4);
    box-shadow: 0 8px 32px rgba(239, 68, 68, 0.15);
}

.column.theme-coral .column-header {
    background: linear-gradient(135deg, rgba(254, 202, 202, 0.9), rgba(239, 68, 68, 0.2));
    border-bottom: 2px solid rgba(239, 68, 68, 0.3);
}

.column.theme-coral .column-title {
    color: #991b1b;
}

.column.theme-coral .column-card-count {
    background: rgba(239, 68, 68, 0.2);
    color: #991b1b;
}

/* THÈME PÊCHE - Pêche pastel */
.column.theme-peach {
    background: linear-gradient(135deg, rgba(255, 237, 213, 0.85), rgba(254, 215, 170, 0.85));
    border: 1px solid rgba(251, 191, 36, 0.4);
    box-shadow: 0 8px 32px rgba(245, 158, 11, 0.15);
}

.column.theme-peach .column-header {
    background: linear-gradient(135deg, rgba(254, 215, 170, 0.9), rgba(245, 158, 11, 0.2));
    border-bottom: 2px solid rgba(245, 158, 11, 0.3);
}

.column.theme-peach .column-title {
    color: #92400e;
}

.column.theme-peach .column-card-count {
    background: rgba(245, 158, 11, 0.2);
    color: #92400e;
}

/* THÈME ARDOISE - Gris élégant */
.column.theme-slate {
    background: linear-gradient(135deg, rgba(241, 245, 249, 0.85), rgba(226, 232, 240, 0.85));
    border: 1px solid rgba(148, 163, 184, 0.4);
    box-shadow: 0 8px 32px rgba(100, 116, 139, 0.15);
}

.column.theme-slate .column-header {
    background: linear-gradient(135deg, rgba(226, 232, 240, 0.9), rgba(100, 116, 139, 0.2));
    border-bottom: 2px solid rgba(100, 116, 139, 0.3);
}

.column.theme-slate .column-title {
    color: #1e293b;
}

.column.theme-slate .column-card-count {
    background: rgba(100, 116, 139, 0.2);
    color: #1e293b;
}

/* THÈME INDIGO - Indigo profond */
.column.theme-indigo {
    background: linear-gradient(135deg, rgba(224, 231, 255, 0.85), rgba(199, 210, 254, 0.85));
    border: 1px solid rgba(129, 140, 248, 0.4);
    box-shadow: 0 8px 32px rgba(99, 102, 241, 0.15);
}

.column.theme-indigo .column-header {
    background: linear-gradient(135deg, rgba(199, 210, 254, 0.9), rgba(99, 102, 241, 0.2));
    border-bottom: 2px solid rgba(99, 102, 241, 0.3);
}

.column.theme-indigo .column-title {
    color: #312e81;
}

.column.theme-indigo .column-card-count {
    background: rgba(99, 102, 241, 0.2);
    color: #312e81;
}

/* THÈME SOMBRE - Mode dark élégant */
.column.theme-dark {
    background: linear-gradient(135deg, rgba(30, 30, 40, 0.95), rgba(20, 20, 30, 0.95));
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.column.theme-dark .column-header {
    background: linear-gradient(135deg, rgba(40, 40, 50, 0.95), rgba(30, 30, 40, 0.95));
    border-bottom: 2px solid rgba(255, 255, 255, 0.1);
}

.column.theme-dark .column-title {
    color: rgba(255, 255, 255, 0.95);
}

.column.theme-dark .column-card-count {
    background: rgba(99, 102, 241, 0.3);
    color: rgba(199, 210, 254, 1);
}

.column.theme-dark .column-btn {
    color: rgba(255, 255, 255, 0.5);
}

.column.theme-dark .column-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.9);
}

.column.theme-dark .column-empty {
    background: rgba(40, 40, 50, 0.5);
    border-color: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.5);
}

/* THÈME GRADIENT ARC-EN-CIEL */
.column.theme-rainbow {
    background: linear-gradient(135deg, 
        rgba(254, 202, 202, 0.8) 0%,
        rgba(254, 240, 138, 0.8) 20%,
        rgba(187, 247, 208, 0.8) 40%,
        rgba(186, 230, 253, 0.8) 60%,
        rgba(221, 214, 254, 0.8) 80%,
        rgba(251, 207, 232, 0.8) 100%
    );
    border: 1px solid rgba(255, 255, 255, 0.6);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.column.theme-rainbow .column-header {
    background: rgba(255, 255, 255, 0.95);
    border-bottom: 2px solid rgba(0, 0, 0, 0.05);
}

/* ───────────────────────────────────────────────────────────────────────────
   THÈMES DE FOND DE TABLEAU (WORKSPACE)
   ─────────────────────────────────────────────────────────────────────────── */

/* Fond par défaut */
.workspace.bg-default {
    background: var(--color-background);
}

/* Fond ciel bleu */
.workspace.bg-sky {
    background: linear-gradient(135deg, #e0f2fe 0%, #bae6fd 50%, #7dd3fc 100%);
}

/* Fond coucher de soleil */
.workspace.bg-sunset-gradient {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 25%, #fed7aa 50%, #fb923c 75%, #f97316 100%);
}

/* Fond océan profond */
.workspace.bg-deep-ocean {
    background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 50%, #3b82f6 100%);
}

/* Fond forêt mystique */
.workspace.bg-forest-mist {
    background: linear-gradient(135deg, #064e3b 0%, #047857 50%, #10b981 100%);
}

/* Fond aurore boréale */
.workspace.bg-aurora {
    background: linear-gradient(135deg, #1e1b4b 0%, #4c1d95 25%, #7c3aed 50%, #06b6d4 75%, #10b981 100%);
}

/* Fond crépuscule */
.workspace.bg-twilight {
    background: linear-gradient(135deg, #1e1b4b 0%, #312e81 25%, #4338ca 50%, #7c3aed 75%, #c084fc 100%);
}

/* Fond pastel doux */
.workspace.bg-pastel {
    background: linear-gradient(135deg, #fef3c7 0%, #fed7aa 20%, #fecaca 40%, #fecdd3 60%, #e9d5ff 80%, #ddd6fe 100%);
}

/* Fond monochrome élégant */
.workspace.bg-monochrome {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 50%, #cbd5e1 100%);
}

/* Fond corail vibrant */
.workspace.bg-coral-reef {
    background: linear-gradient(135deg, #fff7ed 0%, #fed7aa 25%, #fb923c 50%, #f97316 75%, #ea580c 100%);
}

/* Fond jardin de roses */
.workspace.bg-rose-garden {
    background: linear-gradient(135deg, #fdf2f8 0%, #fce7f3 25%, #fbcfe8 50%, #f9a8d4 75%, #ec4899 100%);
}

/* Fond menthe fraîche */
.workspace.bg-fresh-mint {
    background: linear-gradient(135deg, #f0fdfa 0%, #ccfbf1 25%, #99f6e4 50%, #5eead4 75%, #14b8a6 100%);
}

/* Fond lavande douce */
.workspace.bg-soft-lavender {
    background: linear-gradient(135deg, #faf5ff 0%, #f3e8ff 25%, #e9d5ff 50%, #d8b4fe 75%, #c084fc 100%);
}

/* Fond nuit étoilée */
.workspace.bg-starry-night {
    background: #0f172a;
    position: relative;
}

.workspace.bg-starry-night::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: 
        radial-gradient(2px 2px at 20px 30px, white, transparent),
        radial-gradient(2px 2px at 60px 70px, white, transparent),
        radial-gradient(1px 1px at 50px 50px, white, transparent),
        radial-gradient(1px 1px at 130px 80px, white, transparent),
        radial-gradient(2px 2px at 90px 10px, white, transparent);
    background-size: 200px 200px;
    background-repeat: repeat;
    opacity: 0.5;
    animation: stars-twinkle 5s ease-in-out infinite;
}

@keyframes stars-twinkle {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 0.8; }
}

/* Fond abstrait géométrique */
.workspace.bg-geometric {
    background-color: #f8fafc;
    background-image: 
        linear-gradient(30deg, #e0f2fe 12%, transparent 12.5%, transparent 87%, #e0f2fe 87.5%, #e0f2fe),
        linear-gradient(150deg, #e0f2fe 12%, transparent 12.5%, transparent 87%, #e0f2fe 87.5%, #e0f2fe),
        linear-gradient(30deg, #e0f2fe 12%, transparent 12.5%, transparent 87%, #e0f2fe 87.5%, #e0f2fe),
        linear-gradient(150deg, #e0f2fe 12%, transparent 12.5%, transparent 87%, #e0f2fe 87.5%, #e0f2fe);
    background-size: 80px 140px;
    background-position: 0 0, 0 0, 40px 70px, 40px 70px, 0 0, 40px 70px;
}

/* Fond vagues océan */
.workspace.bg-ocean-waves {
    background: linear-gradient(135deg, #0ea5e9 0%, #06b6d4 100%);
    position: relative;
}

.workspace.bg-ocean-waves::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 200px;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1200 120'%3E%3Cpath d='M0 0v46.29c47.79 22.2 103.59 32.17 158 28 70.36-5.37 136.33-33.31 206.8-37.5 73.84-4.36 147.54 16.88 218.2 35.26 69.27 18 138.3 24.88 209.4 13.08 36.15-6 69.85-17.84 104.45-29.34C989.49 25 1113-14.29 1200 52.47V0z' fill='%23ffffff' fill-opacity='0.2'/%3E%3C/svg%3E") repeat-x;
    background-size: 1200px 120px;
    animation: waves 10s linear infinite;
}

@keyframes waves {
    0% { background-position: 0 0; }
    100% { background-position: 1200px 0; }
}

/* Fond particules flottantes */
.workspace.bg-particles {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: relative;
    overflow: hidden;
}

/* Fond gradient animé */
.workspace.bg-animated-gradient {
    background: linear-gradient(-45deg, #ee7752, #e73c7e, #23a6d5, #23d5ab);
    background-size: 400% 400%;
    animation: gradient-shift 15s ease infinite;
}

@keyframes gradient-shift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* ───────────────────────────────────────────────────────────────────────────
   MODAL DE SÉLECTION DE THÈME
   ─────────────────────────────────────────────────────────────────────────── */

.theme-selector-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: var(--space-3);
    margin-top: var(--space-3);
}

.theme-option {
    aspect-ratio: 1;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 3px solid transparent;
    position: relative;
    overflow: hidden;
}

.theme-option:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.theme-option.selected {
    border-color: var(--color-primary-500);
    box-shadow: 0 0 0 3px var(--color-primary-100);
}

.theme-option::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0);
    transition: background var(--transition-fast);
}

.theme-option:hover::after {
    background: rgba(0, 0, 0, 0.05);
}

.theme-option-label {
    position: absolute;
    bottom: var(--space-1);
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
    font-size: 0.7rem;
    font-weight: 600;
    white-space: nowrap;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.theme-option:hover .theme-option-label {
    opacity: 1;
}

/* Aperçus des thèmes de colonnes */
.theme-option.theme-preview-default { background: linear-gradient(135deg, rgba(255,255,255,0.95), rgba(248,250,252,0.95)); }
.theme-option.theme-preview-ocean { background: linear-gradient(135deg, rgba(219, 234, 254, 0.95), rgba(191, 219, 254, 0.95)); }
.theme-option.theme-preview-forest { background: linear-gradient(135deg, rgba(220, 252, 231, 0.95), rgba(187, 247, 208, 0.95)); }
.theme-option.theme-preview-sunset { background: linear-gradient(135deg, rgba(254, 243, 199, 0.95), rgba(253, 186, 116, 0.95)); }
.theme-option.theme-preview-lavender { background: linear-gradient(135deg, rgba(243, 232, 255, 0.95), rgba(233, 213, 255, 0.95)); }
.theme-option.theme-preview-rose { background: linear-gradient(135deg, rgba(252, 231, 243, 0.95), rgba(249, 168, 212, 0.95)); }
.theme-option.theme-preview-mint { background: linear-gradient(135deg, rgba(204, 251, 241, 0.95), rgba(153, 246, 228, 0.95)); }
.theme-option.theme-preview-coral { background: linear-gradient(135deg, rgba(254, 226, 226, 0.95), rgba(252, 165, 165, 0.95)); }
.theme-option.theme-preview-peach { background: linear-gradient(135deg, rgba(255, 237, 213, 0.95), rgba(254, 215, 170, 0.95)); }
.theme-option.theme-preview-slate { background: linear-gradient(135deg, rgba(241, 245, 249, 0.95), rgba(226, 232, 240, 0.95)); }
.theme-option.theme-preview-indigo { background: linear-gradient(135deg, rgba(224, 231, 255, 0.95), rgba(199, 210, 254, 0.95)); }
.theme-option.theme-preview-dark { background: linear-gradient(135deg, rgba(30, 30, 40, 0.95), rgba(20, 20, 30, 0.95)); }
.theme-option.theme-preview-rainbow { 
    background: linear-gradient(135deg, 
        rgba(254, 202, 202, 0.8) 0%,
        rgba(254, 240, 138, 0.8) 20%,
        rgba(187, 247, 208, 0.8) 40%,
        rgba(186, 230, 253, 0.8) 60%,
        rgba(221, 214, 254, 0.8) 80%,
        rgba(251, 207, 232, 0.8) 100%
    );
}

/* Aperçus des thèmes de fond */
.bg-preview {
    height: 80px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 3px solid transparent;
    position: relative;
    overflow: hidden;
}

.bg-preview:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-lg);
}

.bg-preview.selected {
    border-color: var(--color-primary-500);
    box-shadow: 0 0 0 3px var(--color-primary-100);
}

/* Styles spécifiques pour les aperçus de fond */
.bg-preview.bg-default { background: var(--color-background); }
.bg-preview.bg-sky { background: linear-gradient(135deg, #e0f2fe 0%, #bae6fd 50%, #7dd3fc 100%); }
.bg-preview.bg-sunset-gradient { background: linear-gradient(135deg, #fef3c7 0%, #fed7aa 25%, #fb923c 75%, #f97316 100%); }
.bg-preview.bg-deep-ocean { background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 50%, #3b82f6 100%); }
.bg-preview.bg-forest-mist { background: linear-gradient(135deg, #064e3b 0%, #047857 50%, #10b981 100%); }
.bg-preview.bg-aurora { background: linear-gradient(135deg, #1e1b4b 0%, #4c1d95 25%, #7c3aed 50%, #06b6d4 75%, #10b981 100%); }
.bg-preview.bg-twilight { background: linear-gradient(135deg, #1e1b4b 0%, #312e81 25%, #4338ca 50%, #7c3aed 75%, #c084fc 100%); }
.bg-preview.bg-pastel { background: linear-gradient(135deg, #fef3c7 0%, #fed7aa 20%, #fecaca 40%, #fecdd3 60%, #e9d5ff 80%, #ddd6fe 100%); }
.bg-preview.bg-monochrome { background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 50%, #cbd5e1 100%); }
.bg-preview.bg-coral-reef { background: linear-gradient(135deg, #fff7ed 0%, #fed7aa 25%, #fb923c 50%, #f97316 75%, #ea580c 100%); }
.bg-preview.bg-rose-garden { background: linear-gradient(135deg, #fdf2f8 0%, #fce7f3 25%, #fbcfe8 50%, #f9a8d4 75%, #ec4899 100%); }
.bg-preview.bg-fresh-mint { background: linear-gradient(135deg, #f0fdfa 0%, #ccfbf1 25%, #99f6e4 50%, #5eead4 75%, #14b8a6 100%); }
.bg-preview.bg-soft-lavender { background: linear-gradient(135deg, #faf5ff 0%, #f3e8ff 25%, #e9d5ff 50%, #d8b4fe 75%, #c084fc 100%); }
.bg-preview.bg-starry-night { background: #0f172a; }
.bg-preview.bg-animated-gradient { 
    background: linear-gradient(-45deg, #ee7752, #e73c7e, #23a6d5, #23d5ab);
    background-size: 400% 400%;
}

.bg-label {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: var(--space-1);
    font-size: 0.75rem;
    font-weight: 600;
    text-align: center;
}
/* ═══════════════════════════════════════════════════════════════════════════
   DRAG & DROP CARD REORDERING STYLES
   ═══════════════════════════════════════════════════════════════════════════ */

/* Carte en cours de drag */
.file-card.dragging {
    opacity: 0.5;
    transform: scale(0.95);
    cursor: grabbing !important;
}

/* Indicateur visuel : drop au-dessus */
.file-card.drop-above {
    position: relative;
}

.file-card.drop-above::before {
    content: '';
    position: absolute;
    top: -4px;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--color-primary-500);
    border-radius: 2px;
    z-index: 10;
    animation: dropIndicator 0.3s ease;
}

/* Indicateur visuel : drop en-dessous */
.file-card.drop-below {
    position: relative;
}

.file-card.drop-below::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--color-primary-500);
    border-radius: 2px;
    z-index: 10;
    animation: dropIndicator 0.3s ease;
}

@keyframes dropIndicator {
    0% {
        opacity: 0;
        transform: scaleX(0.8);
    }
    100% {
        opacity: 1;
        transform: scaleX(1);
    }
}

/* Améliorer le curseur pendant le drag */
.file-card[draggable="true"] {
    cursor: grab;
}

.file-card[draggable="true"]:active {
    cursor: grabbing;
}

/* Transition fluide pour les cartes */
.file-card {
    transition: transform 0.2s ease, opacity 0.2s ease;
}
/* Styles pour le bouton Nouveau lien dans le modal */
.picker-actions {
    margin-bottom: var(--space-4);
    display: flex;
    gap: var(--space-2);
}

.picker-actions .btn {
    flex: 1;
}