* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg: #f8f9fa;
    --text: #2d3436;
    --text-secondary: #636e72;
    --border: #dfe6e9;
    --card-bg: #ffffff;
    --card-hover: #f1f3f5;
    
    /* Default accent colors (for common parts) */
    --accent: #6c5ce7;
    --accent-light: #a29bfe;
    --accent-dark: #5f3dc4;
    
    /* Level-specific colors */
    --accent-5eme: #0984e3;
    --accent-5eme-light: #74b9ff;
    --accent-5eme-dark: #0652a8;
    
    --accent-4eme: #00b894;
    --accent-4eme-light: #55efc4;
    --accent-4eme-dark: #00896c;
    
    --accent-3eme: #e17055;
    --accent-3eme-light: #fab1a0;
    --accent-3eme-dark: #c0503a;
    
    --shadow-sm: 0 2px 4px rgba(108, 92, 231, 0.08);
    --shadow-md: 0 4px 12px rgba(108, 92, 231, 0.12);
    --shadow-lg: 0 8px 24px rgba(108, 92, 231, 0.16);
    --radius-sm: 12px;
    --radius-md: 16px;
    --radius-lg: 20px;
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2.5rem;
}

.header {
    margin-bottom: 3rem;
    opacity: 0;
    animation: fadeIn 0.8s ease forwards;
}

.header-content {
    border-bottom: 3px solid var(--accent);
    padding-bottom: 1.5rem;
}

.title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 3rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--accent-dark) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    font-weight: 500;
}

.filters-container {
    display: flex;
    gap: 1.25rem;
    flex-wrap: wrap;
    margin-bottom: 2.5rem;
    opacity: 0;
    animation: fadeIn 0.8s ease 0.2s forwards;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    flex: 1;
    min-width: 200px;
}

.filter-group label {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    font-weight: 500;
}

.filter-select,
.search-input {
    padding: 0.9rem 1.2rem;
    border: 2px solid var(--border);
    background: var(--card-bg);
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    outline: none;
    border-radius: var(--radius-sm);
}

.filter-select optgroup {
    font-weight: 600;
    color: var(--accent);
    font-size: 0.9rem;
    padding: 0.5rem 0;
    margin-top: 0.5rem;
}

.filter-select option {
    padding: 0.5rem;
    font-weight: 400;
    color: var(--text);
}

.filter-select:focus,
.search-input:focus {
    border-color: var(--accent);
    background: var(--bg);
    box-shadow: 0 0 0 4px rgba(108, 92, 231, 0.1);
    transform: translateY(-1px);
}

.filter-select:hover,
.search-input:hover {
    border-color: var(--accent-light);
}

.reset-btn {
    padding: 0.9rem 1.8rem;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
    color: white;
    border: none;
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    align-self: flex-end;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
}

.reset-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.reset-btn:active {
    transform: translateY(0);
}

.stats-bar {
    display: flex;
    gap: 2.5rem;
    margin-bottom: 2.5rem;
    padding: 2rem;
    background: linear-gradient(135deg, var(--card-bg) 0%, #fafbfc 100%);
    border: 2px solid var(--border);
    opacity: 0;
    animation: fadeIn 0.8s ease 0.4s forwards;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-dark) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    font-weight: 500;
}

.seances-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: 1.75rem;
    opacity: 0;
    animation: fadeIn 0.8s ease 0.6s forwards;
}

.seance-card {
    background: var(--card-bg);
    border: 2px solid var(--border);
    padding: 1.75rem;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.seance-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 5px;
    height: 100%;
    background: linear-gradient(to bottom, var(--accent-dark), var(--accent-light));
    transform: scaleY(0);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 0 3px 3px 0;
}

.seance-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at top right, rgba(108, 92, 231, 0.05) 0%, transparent 60%);
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
}

.seance-card:hover {
    background: var(--card-hover);
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-light);
}

.seance-card:hover::before {
    transform: scaleY(1);
}

.seance-card:hover::after {
    opacity: 1;
}

.seance-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.25rem;
}

.seance-numero {
    font-size: 0.8rem;
    padding: 0.4rem 0.9rem;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
    color: white;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 600;
    border-radius: var(--radius-sm);
    box-shadow: 0 2px 8px rgba(108, 92, 231, 0.25);
}

.seance-niveau {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 600;
}

.seance-title {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    line-height: 1.4;
    color: var(--text);
}

.seance-sequence {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
    line-height: 1.5;
}

.seance-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    font-size: 0.85rem;
}

.meta-tag {
    padding: 0.4rem 0.75rem;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    font-weight: 500;
    transition: all 0.3s ease;
}

.seance-card:hover .meta-tag {
    background: white;
    border-color: var(--accent-light);
}

/* Level-specific card styling */
.seance-card[data-niveau="5ème"] {
    border-left: 4px solid var(--accent-5eme);
}

.seance-card[data-niveau="5ème"]::before {
    background: linear-gradient(to bottom, var(--accent-5eme-dark), var(--accent-5eme-light));
}

.seance-card[data-niveau="5ème"]::after {
    background: radial-gradient(circle at top right, rgba(9, 132, 227, 0.05) 0%, transparent 60%);
}

.seance-card[data-niveau="5ème"]:hover {
    border-color: var(--accent-5eme-light);
}

.seance-card[data-niveau="5ème"] .seance-numero {
    background: linear-gradient(135deg, var(--accent-5eme) 0%, var(--accent-5eme-light) 100%);
    box-shadow: 0 2px 8px rgba(9, 132, 227, 0.25);
}

.seance-card[data-niveau="4ème"] {
    border-left: 4px solid var(--accent-4eme);
}

.seance-card[data-niveau="4ème"]::before {
    background: linear-gradient(to bottom, var(--accent-4eme-dark), var(--accent-4eme-light));
}

.seance-card[data-niveau="4ème"]::after {
    background: radial-gradient(circle at top right, rgba(0, 184, 148, 0.05) 0%, transparent 60%);
}

.seance-card[data-niveau="4ème"]:hover {
    border-color: var(--accent-4eme-light);
}

.seance-card[data-niveau="4ème"] .seance-numero {
    background: linear-gradient(135deg, var(--accent-4eme) 0%, var(--accent-4eme-light) 100%);
    box-shadow: 0 2px 8px rgba(0, 184, 148, 0.25);
}

.seance-card[data-niveau="3ème"] {
    border-left: 4px solid var(--accent-3eme);
}

.seance-card[data-niveau="3ème"]::before {
    background: linear-gradient(to bottom, var(--accent-3eme-dark), var(--accent-3eme-light));
}

.seance-card[data-niveau="3ème"]::after {
    background: radial-gradient(circle at top right, rgba(225, 112, 85, 0.05) 0%, transparent 60%);
}

.seance-card[data-niveau="3ème"]:hover {
    border-color: var(--accent-3eme-light);
}

.seance-card[data-niveau="3ème"] .seance-numero {
    background: linear-gradient(135deg, var(--accent-3eme) 0%, var(--accent-3eme-light) 100%);
    box-shadow: 0 2px 8px rgba(225, 112, 85, 0.25);
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(45, 52, 54, 0.85);
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.3s ease;
    backdrop-filter: blur(16px);
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
}

.modal-content {
    background: var(--bg);
    max-width: 900px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    padding: 3.5rem;
    position: relative;
    transform: translateY(30px) scale(0.95);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 60px rgba(108, 92, 231, 0.3);
}

.modal.active .modal-content {
    transform: translateY(0) scale(1);
}

.modal-close {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    background: white;
    border: 2px solid var(--border);
    font-size: 1.75rem;
    cursor: pointer;
    color: var(--text);
    line-height: 1;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-sm);
}

.modal-close:hover {
    transform: rotate(90deg);
    background: var(--accent);
    color: white;
    border-color: var(--accent);
    box-shadow: var(--shadow-md);
}

.modal-header {
    margin-bottom: 2.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 3px solid var(--accent);
}

.modal-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 2.25rem;
    margin-bottom: 0.75rem;
    line-height: 1.3;
    color: var(--text);
}

.modal-meta {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.modal-section {
    margin-bottom: 2.5rem;
}

.modal-section h3 {
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
    color: var(--accent);
    font-weight: 600;
}

.modal-section p {
    margin-bottom: 0.75rem;
    line-height: 1.7;
    color: var(--text);
}

.modal-section ul {
    padding-left: 1.75rem;
    line-height: 1.8;
}

/* Custom scrollbar for modal */
.modal-content::-webkit-scrollbar {
    width: 8px;
}

.modal-content::-webkit-scrollbar-track {
    background: var(--border);
    border-radius: 4px;
}

.modal-content::-webkit-scrollbar-thumb {
    background: var(--accent-light);
    border-radius: 4px;
}

.modal-content::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}

.activities-container {
    margin-top: 1rem;
}

.activities-toggle {
    width: 100%;
    padding: 1rem 1.5rem;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-sm);
}

.activities-toggle:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.activities-toggle:active {
    transform: translateY(0);
}

.toggle-icon {
    font-size: 0.9rem;
    transition: transform 0.3s ease;
}

.activities-content {
    margin-top: 1.5rem;
    padding: 1.5rem;
    background: white;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    max-height: 600px;
    overflow-y: auto;
    transition: all 0.4s ease;
}

.activities-content.hidden {
    display: none;
}

.activity-phase {
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border);
}

.activity-phase:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.phase-header {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 1rem;
    padding: 0.75rem 1rem;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-left: 4px solid var(--accent);
    border-radius: var(--radius-sm);
}

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

.phase-content p {
    margin-bottom: 1rem;
    color: var(--text);
}

.phase-content li {
    margin-left: 2rem;
    margin-bottom: 0.5rem;
    color: var(--text);
    list-style-type: disc;
}

.sub-heading {
    font-size: 1rem;
    font-weight: 600;
    color: var(--accent-dark);
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
}

.activities-content::-webkit-scrollbar {
    width: 8px;
}

.activities-content::-webkit-scrollbar-track {
    background: var(--border);
    border-radius: 4px;
}

.activities-content::-webkit-scrollbar-thumb {
    background: var(--accent-light);
    border-radius: 4px;
}

.activities-content::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}

/* Level-specific modal styling */
.modal-content[data-niveau="5ème"] .modal-header {
    border-bottom-color: var(--accent-5eme);
}

.modal-content[data-niveau="5ème"] .modal-section h3 {
    color: var(--accent-5eme);
}

.modal-content[data-niveau="5ème"] .activities-toggle {
    background: linear-gradient(135deg, var(--accent-5eme) 0%, var(--accent-5eme-light) 100%);
    box-shadow: 0 2px 8px rgba(9, 132, 227, 0.25);
}

.modal-content[data-niveau="5ème"] .phase-header {
    color: var(--accent-5eme);
    border-left-color: var(--accent-5eme);
}

.modal-content[data-niveau="5ème"] .sub-heading {
    color: var(--accent-5eme-dark);
}

.modal-content[data-niveau="5ème"] .activities-content::-webkit-scrollbar-thumb {
    background: var(--accent-5eme-light);
}

.modal-content[data-niveau="5ème"] .activities-content::-webkit-scrollbar-thumb:hover {
    background: var(--accent-5eme);
}

.modal-content[data-niveau="4ème"] .modal-header {
    border-bottom-color: var(--accent-4eme);
}

.modal-content[data-niveau="4ème"] .modal-section h3 {
    color: var(--accent-4eme);
}

.modal-content[data-niveau="4ème"] .activities-toggle {
    background: linear-gradient(135deg, var(--accent-4eme) 0%, var(--accent-4eme-light) 100%);
    box-shadow: 0 2px 8px rgba(0, 184, 148, 0.25);
}

.modal-content[data-niveau="4ème"] .phase-header {
    color: var(--accent-4eme);
    border-left-color: var(--accent-4eme);
}

.modal-content[data-niveau="4ème"] .sub-heading {
    color: var(--accent-4eme-dark);
}

.modal-content[data-niveau="4ème"] .activities-content::-webkit-scrollbar-thumb {
    background: var(--accent-4eme-light);
}

.modal-content[data-niveau="4ème"] .activities-content::-webkit-scrollbar-thumb:hover {
    background: var(--accent-4eme);
}

.modal-content[data-niveau="3ème"] .modal-header {
    border-bottom-color: var(--accent-3eme);
}

.modal-content[data-niveau="3ème"] .modal-section h3 {
    color: var(--accent-3eme);
}

.modal-content[data-niveau="3ème"] .activities-toggle {
    background: linear-gradient(135deg, var(--accent-3eme) 0%, var(--accent-3eme-light) 100%);
    box-shadow: 0 2px 8px rgba(225, 112, 85, 0.25);
}

.modal-content[data-niveau="3ème"] .phase-header {
    color: var(--accent-3eme);
    border-left-color: var(--accent-3eme);
}

.modal-content[data-niveau="3ème"] .sub-heading {
    color: var(--accent-3eme-dark);
}

.modal-content[data-niveau="3ème"] .activities-content::-webkit-scrollbar-thumb {
    background: var(--accent-3eme-light);
}

.modal-content[data-niveau="3ème"] .activities-content::-webkit-scrollbar-thumb:hover {
    background: var(--accent-3eme);
}

.activities-content .sentence { margin: 0 0 .5rem 0; line-height: 1.5; }
.activities-content .phase-list { margin: .5rem 0; padding-left: 1.2rem; }
.activities-content .sub-heading { margin: .6rem 0 .2rem; font-weight: 600; }


@keyframes fadeIn {
    to {
        opacity: 1;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 1.5rem;
    }
    
    .title {
        font-size: 2.25rem;
    }
    
    .filters-container {
        flex-direction: column;
    }
    
    .filter-group {
        min-width: 100%;
    }
    
    .seances-grid {
        grid-template-columns: 1fr;
    }
    
    .modal-content {
        padding: 2.5rem 1.75rem;
    }
    
    .modal-title {
        font-size: 1.75rem;
    }
}