/* ============================================
   MathOral - Styles
   App d'entrainement aux oraux de maths prepa
   ============================================ */

/* CSS Variables */
:root {
    --primary: #1a1a2e;
    --primary-light: #2d2d44;
    --accent: #4361ee;
    --accent-hover: #3a56d4;
    --success: #06d6a0;
    --warning: #ffd166;
    --danger: #ef476f;
    --text: #1a1a2e;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --bg: #fafafa;
    --bg-card: #ffffff;
    --border: #e5e7eb;
    --border-light: #f3f4f6;
    --shadow: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1);
    --radius: 8px;
    --radius-lg: 12px;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-serif: 'Source Serif 4', Georgia, serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

/* ============================================
   HEADER
   ============================================ */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0.75rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
}

.logo-icon {
    width: 40px;
    height: 40px;
    color: var(--accent);
}

.logo-icon svg {
    width: 100%;
    height: 100%;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: -0.02em;
}

.logo-subtitle {
    font-size: 0.7rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.header-nav {
    display: flex;
    gap: 0.25rem;
}

.nav-btn {
    padding: 0.5rem 1rem;
    background: transparent;
    border: none;
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s;
}

.nav-btn:hover {
    color: var(--text);
    background: var(--border-light);
}

.nav-btn.active {
    color: var(--accent);
    background: rgba(67, 97, 238, 0.1);
}

.express-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: var(--radius);
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.express-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

/* ============================================
   MAIN CONTENT & VIEWS
   ============================================ */
.main-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

.view {
    display: none;
}

.view.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.view-header {
    margin-bottom: 2rem;
}

.view-header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.view-header p {
    color: var(--text-secondary);
}

/* ============================================
   HOME VIEW
   ============================================ */
.hero {
    text-align: center;
    padding: 3rem 2rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: var(--radius-lg);
    color: white;
    margin-bottom: 2rem;
}

.hero h1 {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 2rem;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
}

.stat-label {
    font-size: 0.8rem;
    opacity: 0.8;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Quick Start */
.quick-start {
    margin-bottom: 2rem;
}

.quick-start h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.quick-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
}

.quick-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    cursor: pointer;
    transition: all 0.2s;
}

.quick-card:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.quick-card.express {
    background: linear-gradient(135deg, var(--accent) 0%, #7c3aed 100%);
    color: white;
    border: none;
}

.quick-card.express .quick-icon {
    background: rgba(255,255,255,0.2);
    color: white;
}

.quick-card.express p {
    opacity: 0.9;
}

.quick-icon {
    width: 48px;
    height: 48px;
    background: var(--border-light);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    color: var(--accent);
}

.quick-icon svg {
    width: 24px;
    height: 24px;
}

.quick-card h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.quick-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Section Grid */
.section-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.section-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
}

.section-card h2 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--primary);
}

/* Exercise List (Home) */
.exercise-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.exercise-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem;
    background: var(--border-light);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s;
}

.exercise-item:hover {
    background: var(--border);
}

.exercise-item-tag {
    padding: 0.25rem 0.5rem;
    background: var(--primary);
    color: white;
    font-size: 0.7rem;
    font-weight: 600;
    border-radius: 4px;
}

.exercise-item-title {
    flex: 1;
    font-size: 0.9rem;
    font-weight: 500;
}

.exercise-item-arrow {
    color: var(--text-light);
}

/* Theme Grid */
.theme-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
}

.theme-card {
    padding: 1rem;
    background: var(--border-light);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s;
    text-align: center;
}

.theme-card:hover {
    background: var(--border);
}

.theme-card-name {
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.theme-card-count {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* ============================================
   EXERCISES VIEW
   ============================================ */
.filters {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.filter-group label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.filter-group select {
    padding: 0.5rem 2rem 0.5rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-family: inherit;
    font-size: 0.875rem;
    background: var(--bg-card);
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2'%3E%3Cpolyline points='6,9 12,15 18,9'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.5rem center;
}

.exercises-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1rem;
}

.exercise-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    cursor: pointer;
    transition: all 0.2s;
}

.exercise-card:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.exercise-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.75rem;
}

.exercise-card-tags {
    display: flex;
    gap: 0.5rem;
}

.tag {
    padding: 0.2rem 0.5rem;
    font-size: 0.7rem;
    font-weight: 600;
    border-radius: 4px;
    text-transform: uppercase;
}

.tag-concours {
    background: var(--primary);
    color: white;
}

.tag-theme {
    background: var(--border-light);
    color: var(--text-secondary);
}

.exercise-card-difficulty {
    display: flex;
    gap: 2px;
}

.difficulty-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--border);
}

.difficulty-dot.filled {
    background: var(--accent);
}

.exercise-card h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.exercise-card-preview {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    font-family: var(--font-serif);
    font-style: italic;
}

.exercise-card-methodes {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.methode-badge {
    padding: 0.2rem 0.5rem;
    background: rgba(67, 97, 238, 0.1);
    color: var(--accent);
    font-size: 0.7rem;
    font-weight: 500;
    border-radius: 4px;
}

/* ============================================
   METHODES VIEW
   ============================================ */
.methodes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 1rem;
}

.methode-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    cursor: pointer;
    transition: all 0.2s;
}

.methode-card:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow-md);
}

.methode-card-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.methode-card-icon {
    width: 48px;
    height: 48px;
    background: rgba(67, 97, 238, 0.1);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.methode-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
}

.methode-card-trigger {
    background: var(--border-light);
    padding: 1rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
}

.methode-card-trigger p {
    font-size: 0.9rem;
    font-family: var(--font-serif);
}

.methode-card-trigger strong {
    color: var(--accent);
}

.methode-card-examples {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* ============================================
   ORAUX VIEW
   ============================================ */
.oraux-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.oral-option {
    background: var(--bg-card);
    border: 2px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
}

.oral-option:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.oral-icon {
    width: 64px;
    height: 64px;
    background: var(--border-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    color: var(--accent);
}

.oral-icon svg {
    width: 32px;
    height: 32px;
}

.oral-option h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.oral-option p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.oral-tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--accent);
    color: white;
    font-size: 0.7rem;
    font-weight: 600;
    border-radius: 20px;
    text-transform: uppercase;
}

.oral-tag.secondary {
    background: var(--success);
}

.oral-tag.warning {
    background: var(--warning);
    color: var(--primary);
}

.oral-history h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.oral-history-list {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
}

.empty-state {
    text-align: center;
    color: var(--text-secondary);
    padding: 2rem;
}

/* ============================================
   CARTE VIEW - Visual Interactive Graph
   ============================================ */
.carte-container {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 1rem;
    min-height: 600px;
    height: calc(100vh - 200px);
}

.carte-sidebar {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1rem;
    overflow-y: auto;
}

.carte-sidebar h3 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border);
}

.notion-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.notion-theme-group {
    margin-bottom: 0.75rem;
}

.notion-theme-header {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.25rem 0.5rem;
    margin-bottom: 0.25rem;
}

.notion-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.6rem;
    border-radius: var(--radius);
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s;
}

.notion-item:hover {
    background: var(--border-light);
}

.notion-item.active {
    background: var(--accent);
    color: white;
}

.notion-item.active .notion-dot {
    background: white !important;
}

.notion-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.carte-main {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 0;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

/* Graph Container */
.carte-graph-container {
    flex: 1;
    position: relative;
    background: linear-gradient(135deg, var(--bg-dark) 0%, #1a1a2e 100%);
    background-image:
        radial-gradient(circle at 1px 1px, var(--border) 1px, transparent 0);
    background-size: 40px 40px;
    min-height: 400px;
}

.carte-svg {
    width: 100%;
    height: 100%;
    cursor: grab;
}

.carte-svg:active {
    cursor: grabbing;
}

/* Graph Controls */
.carte-controls {
    position: absolute;
    top: 1rem;
    right: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    z-index: 10;
}

.carte-control-btn {
    width: 32px;
    height: 32px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-card);
    color: var(--text);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.carte-control-btn:hover {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

/* Graph Links */
.carte-link {
    fill: none;
    stroke: var(--border);
    stroke-width: 2;
    opacity: 0.4;
    transition: all 0.3s;
}

.carte-link.highlighted {
    stroke: var(--accent);
    stroke-width: 3;
    opacity: 1;
}

/* Graph Nodes */
.carte-node {
    cursor: pointer;
    transition: transform 0.2s;
}

.carte-node:hover {
    transform: scale(1.1);
}

.carte-node.selected {
    transform: scale(1.15);
}

.carte-node-circle {
    transition: all 0.3s;
    filter: drop-shadow(0 4px 8px rgba(0,0,0,0.3));
}

.carte-node:hover .carte-node-circle {
    filter: drop-shadow(0 6px 16px rgba(0,0,0,0.4));
}

.carte-node.selected .carte-node-circle {
    filter: drop-shadow(0 0 20px currentColor);
}

.carte-node-ring {
    transition: all 0.3s;
}

.carte-node:hover .carte-node-ring,
.carte-node.selected .carte-node-ring {
    opacity: 0.6;
    r: 40;
}

.carte-node-label {
    fill: var(--text);
    font-size: 11px;
    font-weight: 500;
    pointer-events: none;
}

.carte-node-count {
    fill: white;
    font-size: 14px;
    font-weight: 700;
    pointer-events: none;
}

/* Tooltip */
.carte-tooltip {
    position: absolute;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.5rem 0.75rem;
    font-size: 0.85rem;
    pointer-events: none;
    opacity: 0;
    transform: translateX(-50%) translateY(-100%);
    transition: opacity 0.2s;
    z-index: 100;
    white-space: nowrap;
    box-shadow: var(--shadow);
}

.carte-tooltip.visible {
    opacity: 1;
}

/* Detail Panel */
.carte-detail {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    padding: 1rem 1.5rem;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s, padding 0.3s;
}

.carte-detail.visible {
    max-height: 300px;
    overflow-y: auto;
}

.carte-detail-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    padding-left: 0.75rem;
    border-left: 3px solid var(--accent);
}

.carte-detail-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
    margin: 0;
}

.carte-detail-theme {
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    color: white;
}

.carte-detail-section {
    margin-bottom: 1rem;
}

.carte-detail-section h3 {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.carte-connected-notions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.carte-connected-notion {
    font-size: 0.8rem;
    padding: 0.25rem 0.6rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s;
    border-left-width: 3px;
}

.carte-connected-notion:hover {
    background: var(--border-light);
}

.carte-exercises-list {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.carte-exercise-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.4rem 0.6rem;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s;
}

.carte-exercise-item:hover {
    background: var(--border-light);
}

.carte-exercise-tag {
    font-size: 0.65rem;
    font-weight: 600;
    padding: 0.15rem 0.4rem;
    background: var(--primary);
    color: white;
    border-radius: 3px;
}

.carte-exercise-title {
    flex: 1;
    font-size: 0.85rem;
}

.carte-exercise-diff {
    font-size: 0.7rem;
    color: var(--text-muted);
    letter-spacing: -1px;
}

.carte-more-link {
    font-size: 0.8rem;
    color: var(--accent);
    padding: 0.4rem 0.6rem;
    cursor: pointer;
}

.carte-more-link:hover {
    text-decoration: underline;
}

.carte-methodes-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.carte-methode-item {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.8rem;
    padding: 0.3rem 0.6rem;
    background: var(--border-light);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s;
}

.carte-methode-item:hover {
    background: var(--accent);
    color: white;
}

.carte-methode-icon {
    font-size: 0.7rem;
    opacity: 0.7;
}

.carte-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-secondary);
}

@media (max-width: 768px) {
    .carte-container {
        grid-template-columns: 1fr;
        height: auto;
    }

    .carte-sidebar {
        max-height: 200px;
    }

    .carte-graph-container {
        min-height: 350px;
    }

    .carte-detail.visible {
        max-height: 250px;
    }
}

/* ============================================
   FICHES VIEW - Memo, Erreurs, Questions Jury
   ============================================ */
.fiches-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border);
    padding-bottom: 0.5rem;
}

.fiches-tab {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: transparent;
    border: none;
    border-radius: var(--radius) var(--radius) 0 0;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.fiches-tab:hover {
    color: var(--text);
    background: var(--border-light);
}

.fiches-tab.active {
    color: var(--accent);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-bottom-color: var(--bg-card);
    margin-bottom: -1px;
}

.fiches-content {
    display: none;
}

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

/* Fiches Memo Grid */
.fiches-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1rem;
}

.fiche-card {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all 0.2s;
}

.fiche-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.fiche-card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    font-weight: 700;
    color: white;
    flex-shrink: 0;
}

.fiche-card-content h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.fiche-card-content p {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.fiche-card-theme {
    font-size: 0.75rem;
    font-weight: 500;
}

/* Fiche Modal */
.fiche-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.fiche-modal.active {
    display: flex;
}

.fiche-modal-content {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    max-width: 800px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
}

.fiche-modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 32px;
    height: 32px;
    border: none;
    background: var(--border-light);
    border-radius: 50%;
    font-size: 1.25rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.fiche-modal-close:hover {
    background: var(--danger);
    color: white;
}

.fiche-detail {
    padding: 2rem;
}

.fiche-detail-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
    padding-left: 1rem;
    border-left: 4px solid var(--accent);
}

.fiche-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 700;
    color: white;
}

.fiche-detail-header h2 {
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
}

.fiche-theme {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.fiche-formulas {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.fiche-formula {
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: 1rem;
    padding: 0.75rem 1rem;
    background: var(--bg-dark);
    border-radius: var(--radius);
    align-items: center;
}

.formula-name {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.formula-content {
    font-size: 0.95rem;
}

.fiche-tips {
    background: var(--border-light);
    padding: 1.25rem;
    border-radius: var(--radius);
}

.fiche-tips h3 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--warning);
}

.fiche-tips ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.fiche-tips li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    font-size: 0.9rem;
    border-bottom: 1px solid var(--border);
}

.fiche-tips li:last-child {
    border-bottom: none;
}

.fiche-tips li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--warning);
}

/* Erreurs Section */
.erreurs-filter,
.jury-filter {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.erreurs-filter label,
.jury-filter label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.erreurs-filter select,
.jury-filter select {
    padding: 0.5rem 0.75rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-family: inherit;
    font-size: 0.85rem;
}

.erreurs-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.erreur-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    border-left: 4px solid var(--border);
}

.erreur-card.haute {
    border-left-color: var(--danger);
}

.erreur-card.moyenne {
    border-left-color: var(--warning);
}

.erreur-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.75rem;
}

.erreur-severity {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
}

.erreur-severity.haute {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger);
}

.erreur-severity.moyenne {
    background: rgba(245, 158, 11, 0.2);
    color: var(--warning);
}

.erreur-theme {
    font-size: 0.8rem;
    font-weight: 500;
}

.erreur-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.erreur-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.erreur-exemple {
    background: var(--bg-dark);
    border-radius: var(--radius);
    padding: 1rem;
    margin-bottom: 1rem;
}

.erreur-faux,
.erreur-correct {
    padding: 0.5rem 0;
    font-size: 0.9rem;
}

.erreur-faux {
    border-bottom: 1px solid var(--border);
}

.erreur-label {
    font-weight: 600;
    margin-right: 0.5rem;
}

.erreur-faux .erreur-label {
    color: var(--danger);
}

.erreur-correct .erreur-label {
    color: var(--success);
}

.erreur-conseil {
    font-size: 0.85rem;
    padding: 0.75rem;
    background: rgba(59, 130, 246, 0.1);
    border-radius: var(--radius);
    border-left: 3px solid var(--accent);
}

/* Jury Questions Section */
.jury-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 1rem;
}

.jury-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    transition: all 0.2s;
}

.jury-card:hover {
    border-color: var(--accent);
}

.jury-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.75rem;
}

.jury-type {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    padding: 0.2rem 0.5rem;
    background: var(--border-light);
    border-radius: 4px;
    color: var(--text-secondary);
}

.jury-theme {
    font-size: 0.8rem;
    font-weight: 500;
}

.jury-question {
    font-size: 1.1rem;
    font-weight: 500;
    font-style: italic;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

.jury-details {
    font-size: 0.85rem;
}

.jury-conseil {
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.jury-reponse {
    color: var(--text-muted);
}

.jury-conseil strong,
.jury-reponse strong {
    color: var(--text);
}

@media (max-width: 768px) {
    .fiches-tabs {
        flex-wrap: wrap;
    }

    .fiches-grid {
        grid-template-columns: 1fr;
    }

    .fiche-formula {
        grid-template-columns: 1fr;
        gap: 0.25rem;
    }

    .jury-list {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   EXERCISE DETAIL VIEW
   ============================================ */
.exercise-container {
    max-width: 800px;
    margin: 0 auto;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.breadcrumb button {
    background: none;
    border: none;
    color: var(--accent);
    font-family: inherit;
    font-size: inherit;
    cursor: pointer;
}

.breadcrumb button:hover {
    text-decoration: underline;
}

.exercise-header {
    margin-bottom: 2rem;
}

.exercise-meta {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.exercise-concours {
    padding: 0.25rem 0.75rem;
    background: var(--primary);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 4px;
}

.exercise-year {
    padding: 0.25rem 0.75rem;
    background: var(--border-light);
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 4px;
}

.exercise-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
}

/* Progress */
.exercise-progress {
    margin-bottom: 2rem;
}

.progress-steps {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
}

.progress-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    opacity: 0.4;
    transition: all 0.3s;
}

.progress-step.active {
    opacity: 1;
}

.progress-step.completed {
    opacity: 1;
}

.progress-step.completed .step-number {
    background: var(--success);
    border-color: var(--success);
}

.step-number {
    width: 28px;
    height: 28px;
    border: 2px solid var(--border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 600;
    background: white;
    transition: all 0.3s;
}

.progress-step.active .step-number {
    border-color: var(--accent);
    background: var(--accent);
    color: white;
}

.step-label {
    font-size: 0.7rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.progress-bar {
    height: 4px;
    background: var(--border);
    border-radius: 2px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--accent);
    border-radius: 2px;
    transition: width 0.3s ease;
    width: 0%;
}

/* Exercise Content */
.exercise-content {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    min-height: 300px;
    margin-bottom: 1.5rem;
}

/* Enonce */
.enonce-content {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    line-height: 1.8;
}

.enonce-content .math {
    font-style: normal;
}

/* Reconnaissance */
.reconnaissance-content h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.reconnaissance-content p {
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

.options-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.option-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s;
}

.option-item:hover {
    border-color: var(--accent);
    background: rgba(67, 97, 238, 0.05);
}

.option-item.selected {
    border-color: var(--accent);
    background: rgba(67, 97, 238, 0.1);
}

.option-item.correct {
    border-color: var(--success);
    background: rgba(6, 214, 160, 0.1);
}

.option-item.incorrect {
    border-color: var(--danger);
    background: rgba(239, 71, 111, 0.1);
}

.option-radio {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.option-item.selected .option-radio {
    border-color: var(--accent);
}

.option-item.selected .option-radio::after {
    content: '';
    width: 10px;
    height: 10px;
    background: var(--accent);
    border-radius: 50%;
}

.option-text {
    flex: 1;
    font-size: 0.95rem;
}

.validate-btn {
    padding: 0.75rem 2rem;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: var(--radius);
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.validate-btn:hover {
    background: var(--accent-hover);
}

.validate-btn:disabled {
    background: var(--border);
    cursor: not-allowed;
}

/* Feedback */
.feedback {
    margin-top: 1.5rem;
    padding: 1rem;
    border-radius: var(--radius);
}

.feedback.success {
    background: rgba(6, 214, 160, 0.1);
    border-left: 4px solid var(--success);
}

.feedback.error {
    background: rgba(239, 71, 111, 0.1);
    border-left: 4px solid var(--danger);
}

.feedback h4 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.feedback p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Strategie */
.strategie-content h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.strategie-input {
    width: 100%;
    min-height: 120px;
    padding: 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-family: inherit;
    font-size: 0.95rem;
    resize: vertical;
    margin-bottom: 1rem;
}

.strategie-input:focus {
    outline: none;
    border-color: var(--accent);
}

.strategie-exemple {
    background: var(--border-light);
    padding: 1rem;
    border-radius: var(--radius);
    margin-top: 1rem;
}

.strategie-exemple h4 {
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--accent);
}

.strategie-exemple p {
    font-size: 0.9rem;
    font-family: var(--font-serif);
}

/* Indices */
.indices-content h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.indices-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.indice-item {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.indice-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    background: var(--border-light);
    cursor: pointer;
}

.indice-header h4 {
    font-size: 0.9rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.indice-badge {
    padding: 0.15rem 0.5rem;
    background: var(--warning);
    color: var(--primary);
    font-size: 0.65rem;
    font-weight: 600;
    border-radius: 4px;
}

.indice-toggle {
    padding: 0.25rem 0.75rem;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 4px;
    font-family: inherit;
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
}

.indice-content {
    padding: 1rem;
    display: none;
    font-size: 0.95rem;
    line-height: 1.6;
}

.indice-content.revealed {
    display: block;
}

/* Oral */
.oral-content h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.oral-prompt {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
    padding: 1.5rem;
    border-radius: var(--radius);
    margin-bottom: 1.5rem;
}

.oral-prompt p {
    font-size: 1.1rem;
    font-family: var(--font-serif);
    font-style: italic;
}

.oral-tips {
    background: var(--border-light);
    padding: 1rem;
    border-radius: var(--radius);
}

.oral-tips h4 {
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.oral-tips ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.oral-tips li {
    font-size: 0.9rem;
    color: var(--text-secondary);
    padding-left: 1.25rem;
    position: relative;
}

.oral-tips li::before {
    content: '>';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: bold;
}

/* Debrief */
.debrief-content h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.debrief-section {
    margin-bottom: 1.5rem;
}

.debrief-section h4 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--accent);
}

.debrief-section p, .debrief-section ul {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.debrief-section ul {
    list-style: disc;
    padding-left: 1.5rem;
}

.debrief-section li {
    margin-bottom: 0.25rem;
}

.debrief-links {
    background: var(--border-light);
    padding: 1rem;
    border-radius: var(--radius);
}

.debrief-links h4 {
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.link-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.link-item {
    padding: 0.35rem 0.75rem;
    background: white;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.8rem;
    color: var(--accent);
    cursor: pointer;
    transition: all 0.2s;
}

.link-item:hover {
    border-color: var(--accent);
    background: rgba(67, 97, 238, 0.1);
}

/* Navigation */
.exercise-nav {
    display: flex;
    justify-content: space-between;
}

.nav-prev, .nav-next {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-card);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.nav-prev:hover:not(:disabled), .nav-next:hover:not(:disabled) {
    border-color: var(--accent);
    color: var(--accent);
}

.nav-prev:disabled, .nav-next:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.nav-prev svg, .nav-next svg {
    width: 16px;
    height: 16px;
}

.nav-next {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

.nav-next:hover:not(:disabled) {
    background: var(--accent-hover);
    color: white;
}

/* ============================================
   METHODE DETAIL VIEW
   ============================================ */
.methode-container {
    max-width: 800px;
    margin: 0 auto;
}

.methode-content {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem;
}

.methode-content h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.methode-content .trigger-box {
    background: var(--border-light);
    padding: 1.25rem;
    border-radius: var(--radius);
    margin: 1.5rem 0;
    font-size: 1.1rem;
    font-family: var(--font-serif);
}

.methode-content .trigger-box strong {
    color: var(--accent);
}

.methode-content section {
    margin-bottom: 2rem;
}

.methode-content section h2 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--primary);
}

.methode-content section ul {
    list-style: disc;
    padding-left: 1.5rem;
}

.methode-content section li {
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.methode-content .examples-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 0.75rem;
    margin-top: 0.5rem;
}

.methode-content .example-card {
    padding: 0.75rem;
    background: var(--border-light);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s;
}

.methode-content .example-card:hover {
    background: var(--border);
}

/* ============================================
   EXPRESS MODE
   ============================================ */
.express-container {
    max-width: 700px;
    margin: 0 auto;
}

.express-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 2rem;
    padding: 1rem 1.5rem;
    background: var(--primary);
    color: white;
    border-radius: var(--radius-lg);
}

.express-timer {
    font-size: 2rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
}

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

.express-quit {
    padding: 0.5rem 1rem;
    background: rgba(255,255,255,0.2);
    color: white;
    border: none;
    border-radius: var(--radius);
    font-family: inherit;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s;
}

.express-quit:hover {
    background: rgba(255,255,255,0.3);
}

.express-question {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: center;
    margin-bottom: 1.5rem;
    min-height: 200px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.express-question h3 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.express-question p {
    font-size: 1.25rem;
    font-family: var(--font-serif);
    line-height: 1.6;
}

.express-actions {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
}

.express-option {
    padding: 1rem;
    background: var(--bg-card);
    border: 2px solid var(--border);
    border-radius: var(--radius);
    font-family: inherit;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.2s;
}

.express-option:hover {
    border-color: var(--accent);
}

.express-option.correct {
    border-color: var(--success);
    background: rgba(6, 214, 160, 0.1);
}

.express-option.incorrect {
    border-color: var(--danger);
    background: rgba(239, 71, 111, 0.1);
}

/* ============================================
   MODAL
   ============================================ */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 200;
}

.modal-overlay.active {
    display: block;
}

.modal {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 500px;
    max-height: 80vh;
    overflow: auto;
    z-index: 201;
}

.modal.active {
    display: block;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border);
}

.modal-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
}

.modal-close {
    width: 32px;
    height: 32px;
    background: var(--border-light);
    border: none;
    border-radius: 50%;
    font-size: 1.25rem;
    color: var(--text-secondary);
    cursor: pointer;
}

.modal-close:hover {
    background: var(--border);
}

.modal-content {
    padding: 1.5rem;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 900px) {
    .header-content {
        flex-wrap: wrap;
        gap: 1rem;
    }

    .header-nav {
        order: 3;
        width: 100%;
        justify-content: center;
    }

    .section-grid {
        grid-template-columns: 1fr;
    }

    .carte-container {
        grid-template-columns: 1fr;
    }

    .carte-sidebar {
        order: 2;
    }
}

@media (max-width: 600px) {
    .hero {
        padding: 2rem 1rem;
    }

    .hero h1 {
        font-size: 1.5rem;
    }

    .hero-stats {
        gap: 1.5rem;
    }

    .stat-value {
        font-size: 1.5rem;
    }

    .quick-cards {
        grid-template-columns: 1fr;
    }

    .exercises-grid {
        grid-template-columns: 1fr;
    }

    .methodes-grid {
        grid-template-columns: 1fr;
    }

    .progress-steps {
        display: none;
    }

    .express-actions {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   KATEX OVERRIDES
   ============================================ */
.katex {
    font-size: 1.1em;
}

.katex-display {
    margin: 1rem 0;
    overflow-x: auto;
    overflow-y: hidden;
}

/* ============================================
   PROGRESS STATUS INDICATORS
   ============================================ */

/* Exercise card status badge */
.exercise-card {
    position: relative;
}

.exercise-status-badge {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    font-weight: 600;
    z-index: 2;
}

.exercise-status-badge.completed {
    background: var(--success);
    color: white;
}

.exercise-status-badge.in_progress {
    background: var(--warning);
    color: var(--primary);
}

.exercise-status-badge.started {
    background: var(--border);
    color: var(--text-secondary);
}

/* Exercise card with status */
.exercise-card.status-completed {
    border-color: var(--success);
    background: linear-gradient(135deg, rgba(6, 214, 160, 0.03), transparent);
}

.exercise-card.status-completed::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--success);
    border-radius: var(--radius) var(--radius) 0 0;
}

.exercise-card.status-in_progress {
    border-color: var(--warning);
    background: linear-gradient(135deg, rgba(255, 209, 102, 0.05), transparent);
}

.exercise-card.status-in_progress::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--warning);
    border-radius: var(--radius) var(--radius) 0 0;
}

/* Exercise item in lists (home page) */
.exercise-item {
    position: relative;
}

.exercise-item.status-completed {
    background: linear-gradient(90deg, rgba(6, 214, 160, 0.08), transparent);
}

.exercise-item.status-in_progress {
    background: linear-gradient(90deg, rgba(255, 209, 102, 0.1), transparent);
}

.exercise-item-status {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    border-radius: 50%;
    flex-shrink: 0;
}

.exercise-item.status-completed .exercise-item-status {
    background: var(--success);
    color: white;
}

.exercise-item.status-in_progress .exercise-item-status {
    background: var(--warning);
    color: var(--primary);
}

/* Theme card progress */
.theme-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.theme-card-mastery {
    font-size: 0.85rem;
    font-weight: 600;
}

.theme-card-progress {
    margin-bottom: 0.5rem;
}

.theme-progress-bar {
    height: 6px;
    background: var(--border);
    border-radius: 3px;
    overflow: hidden;
}

.theme-progress-fill {
    height: 100%;
    border-radius: 3px;
    transition: width 0.3s ease;
}

.theme-card-count {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Home stats enhancements */
.stat-card {
    transition: transform 0.2s ease;
}

.stat-card:hover {
    transform: translateY(-2px);
}

/* Empty state */
.empty-state {
    text-align: center;
    padding: 2rem;
    color: var(--text-secondary);
    font-style: italic;
}

/* ============================================
   PROFIL VIEW
   ============================================ */
.profil-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Overview Stats */
.profil-overview {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.profil-stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.profil-stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.profil-stat-card.main {
    background: linear-gradient(135deg, var(--accent), #6366f1);
    border: none;
    color: white;
}

.profil-stat-card.main .profil-stat-icon {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

.profil-stat-card.main .profil-stat-label {
    color: rgba(255, 255, 255, 0.8);
}

.profil-stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
    color: var(--accent);
    flex-shrink: 0;
}

.profil-stat-icon svg {
    width: 24px;
    height: 24px;
}

.profil-stat-icon.streak {
    background: rgba(255, 209, 102, 0.15);
    color: var(--warning);
}

.profil-stat-icon.express {
    background: rgba(99, 102, 241, 0.15);
    color: #6366f1;
}

.profil-stat-icon.best {
    background: rgba(6, 214, 160, 0.15);
    color: var(--success);
}

.profil-stat-info {
    display: flex;
    flex-direction: column;
}

.profil-stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    line-height: 1.2;
}

.profil-stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Profil Sections */
.profil-section {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.profil-section h2 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text);
}

/* Theme Mastery */
.profil-themes {
    display: grid;
    gap: 1rem;
}

.profil-theme-card {
    background: var(--bg);
    border-radius: var(--radius);
    padding: 1rem;
}

.profil-theme-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.profil-theme-name {
    font-weight: 600;
    font-size: 0.95rem;
}

.profil-theme-mastery {
    font-weight: 700;
    font-size: 0.9rem;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
}

.profil-theme-mastery.high {
    background: rgba(6, 214, 160, 0.15);
    color: var(--success);
}

.profil-theme-mastery.medium {
    background: rgba(255, 209, 102, 0.15);
    color: #d97706;
}

.profil-theme-mastery.low {
    background: rgba(239, 71, 111, 0.1);
    color: var(--danger);
}

.profil-theme-progress {
    margin-bottom: 0.5rem;
}

.profil-theme-bar {
    height: 8px;
    background: var(--border);
    border-radius: 4px;
    overflow: hidden;
}

.profil-theme-fill {
    height: 100%;
    border-radius: 4px;
    transition: width 0.5s ease;
}

.profil-theme-details {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.profil-theme-stat {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.profil-theme-stat .stat-completed {
    font-weight: 600;
    color: var(--success);
}

.profil-theme-stat.in-progress {
    color: var(--warning);
}

.profil-theme-stat.express {
    color: #6366f1;
}

/* Express History Chart */
.express-history-chart {
    display: flex;
    align-items: flex-end;
    gap: 0.5rem;
    height: 150px;
    margin-bottom: 1.5rem;
    padding: 0.5rem;
    background: var(--bg);
    border-radius: var(--radius);
}

.express-history-bar {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 100%;
    min-width: 40px;
}

.express-history-bar .bar-fill {
    width: 100%;
    height: var(--height);
    border-radius: 4px 4px 0 0;
    margin-top: auto;
    transition: height 0.3s ease;
}

.express-history-bar .bar-fill.high {
    background: var(--success);
}

.express-history-bar .bar-fill.medium {
    background: var(--warning);
}

.express-history-bar .bar-fill.low {
    background: var(--danger);
}

.express-history-bar .bar-value {
    font-size: 0.7rem;
    font-weight: 600;
    margin-top: 0.25rem;
    color: var(--text);
}

.express-history-bar .bar-date {
    font-size: 0.65rem;
    color: var(--text-muted);
}

.express-history-summary {
    display: flex;
    justify-content: space-around;
    padding: 1rem;
    background: var(--bg);
    border-radius: var(--radius);
}

.summary-stat {
    text-align: center;
}

.summary-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
}

.summary-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Recent Activity */
.recent-activity-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.recent-activity-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background: var(--bg);
    border-radius: var(--radius);
    cursor: pointer;
    transition: background 0.2s ease;
}

.recent-activity-item:hover {
    background: var(--border-light);
}

.recent-status {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    flex-shrink: 0;
}

.recent-status.completed {
    background: var(--success);
    color: white;
}

.recent-status.in_progress {
    background: var(--warning);
    color: var(--primary);
}

.recent-status.started {
    background: var(--border);
    color: var(--text-secondary);
}

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

.recent-title {
    display: block;
    font-weight: 500;
    font-size: 0.9rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.recent-meta {
    display: block;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.recent-date {
    font-size: 0.75rem;
    color: var(--text-muted);
    white-space: nowrap;
}

/* Profil Actions */
.profil-actions {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
}

.profil-reset-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: transparent;
    border: 1px solid var(--danger);
    color: var(--danger);
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.2s ease;
}

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

.profil-reset-btn svg {
    width: 18px;
    height: 18px;
}

/* Responsive */
@media (max-width: 768px) {
    .profil-overview {
        grid-template-columns: 1fr 1fr;
    }

    .express-history-chart {
        height: 120px;
    }

    .express-history-bar {
        min-width: 30px;
    }

    .express-history-summary {
        flex-direction: column;
        gap: 1rem;
    }
}

/* ============================================
   CORRECTION IA MODAL
   ============================================ */

/* Button in exercise nav */
.nav-ia {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: linear-gradient(135deg, #8b5cf6, #6366f1);
    color: white;
    border: none;
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.nav-ia:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.4);
}

.nav-ia svg {
    width: 20px;
    height: 20px;
}

/* Modal overlay and container */
.correction-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.correction-modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.correction-modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.9);
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 700px;
    max-height: 90vh;
    overflow: hidden;
    z-index: 1001;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.correction-modal.active {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, -50%) scale(1);
}

.correction-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border);
    background: linear-gradient(135deg, #8b5cf6, #6366f1);
    color: white;
}

.correction-modal-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.correction-modal-header .modal-close {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: none;
}

.correction-modal-header .modal-close:hover {
    background: rgba(255, 255, 255, 0.3);
}

.correction-modal-body {
    padding: 1.5rem;
    overflow-y: auto;
    flex: 1;
}

/* Intro text */
.correction-intro {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

/* Tabs */
.correction-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.correction-tab {
    padding: 0.6rem 1.25rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.correction-tab:hover {
    background: var(--border-light);
}

.correction-tab.active {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

.correction-tab-content {
    display: none;
}

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

/* LaTeX input */
#correction-latex-input {
    width: 100%;
    min-height: 150px;
    padding: 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-family: 'Fira Code', 'Monaco', monospace;
    font-size: 0.9rem;
    resize: vertical;
    transition: border-color 0.2s ease;
}

#correction-latex-input:focus {
    outline: none;
    border-color: var(--accent);
}

.correction-preview {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--bg);
    border-radius: var(--radius);
    min-height: 60px;
}

.correction-preview h4 {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.preview-empty {
    color: var(--text-muted);
    font-style: italic;
}

/* Image upload */
.image-upload-zone {
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    transition: all 0.2s ease;
}

.image-upload-zone:hover {
    border-color: var(--accent);
}

.upload-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem 2rem;
    cursor: pointer;
    color: var(--text-secondary);
}

.upload-placeholder svg {
    width: 48px;
    height: 48px;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.upload-placeholder p {
    font-size: 0.95rem;
}

.image-preview-container {
    position: relative;
    padding: 1rem;
}

.image-preview-container img {
    max-width: 100%;
    max-height: 300px;
    border-radius: var(--radius);
    display: block;
    margin: 0 auto;
}

.remove-image {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    width: 32px;
    height: 32px;
    background: var(--danger);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.25rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Submit button */
.correction-submit-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    padding: 1rem;
    margin-top: 1.5rem;
    background: linear-gradient(135deg, #8b5cf6, #6366f1);
    color: white;
    border: none;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.correction-submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.4);
}

.correction-submit-btn svg {
    width: 20px;
    height: 20px;
}

/* Loading */
.correction-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem;
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.correction-loading p {
    margin-top: 1rem;
    color: var(--text-secondary);
}

/* Result section */
.correction-result-section {
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Score circle */
.correction-score {
    text-align: center;
    margin-bottom: 2rem;
}

.score-circle {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: var(--bg);
    border: 4px solid var(--border);
    margin-bottom: 0.75rem;
}

.score-circle.success {
    border-color: var(--success);
    background: rgba(6, 214, 160, 0.1);
}

.score-circle.partial {
    border-color: var(--warning);
    background: rgba(255, 209, 102, 0.1);
}

.score-circle.error {
    border-color: var(--danger);
    background: rgba(239, 71, 111, 0.1);
}

.score-value {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1;
}

.score-circle.success .score-value { color: var(--success); }
.score-circle.partial .score-value { color: #d97706; }
.score-circle.error .score-value { color: var(--danger); }

.score-max {
    font-size: 1rem;
    color: var(--text-muted);
}

.score-verdict {
    font-size: 1.25rem;
    font-weight: 600;
}

.score-verdict.success { color: var(--success); }
.score-verdict.partial { color: #d97706; }
.score-verdict.error { color: var(--danger); }

/* Correction details sections */
.correction-section {
    background: var(--bg);
    border-radius: var(--radius);
    padding: 1rem;
    margin-bottom: 1rem;
}

.correction-section h4 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.correction-section.positifs h4 { color: var(--success); }
.correction-section.erreurs h4 { color: var(--danger); }
.correction-section.conseil h4 { color: var(--accent); }
.correction-section.solution h4 { color: #8b5cf6; }

.correction-section ul {
    list-style: none;
    padding: 0;
}

.correction-section ul li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.correction-section.positifs ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: bold;
}

/* Erreur items */
.erreur-item {
    padding: 0.75rem;
    background: rgba(239, 71, 111, 0.05);
    border-left: 3px solid var(--danger);
    border-radius: 0 var(--radius) var(--radius) 0;
    margin-bottom: 0.75rem;
}

.erreur-type {
    display: inline-block;
    padding: 0.2rem 0.5rem;
    background: var(--danger);
    color: white;
    font-size: 0.75rem;
    border-radius: 4px;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
}

.erreur-desc {
    margin: 0.5rem 0;
    color: var(--text);
}

.erreur-fix {
    margin: 0.5rem 0 0;
    color: var(--success);
    font-size: 0.9rem;
}

.solution-content {
    line-height: 1.8;
}

/* Retry button */
.correction-retry-btn {
    display: block;
    width: 100%;
    padding: 0.75rem;
    margin-top: 1.5rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.correction-retry-btn:hover {
    background: var(--border-light);
}

/* Responsive */
@media (max-width: 600px) {
    .correction-modal {
        width: 95%;
        max-height: 95vh;
    }

    .correction-modal-body {
        padding: 1rem;
    }

    .score-circle {
        width: 100px;
        height: 100px;
    }

    .score-value {
        font-size: 2rem;
    }
}