/* Variables CSS pour cohérence du design */
/* Palette pastel contrastée pour mode clair forcé */
:root {
    /* Couleurs principales pastel contrastées */
    --color-primary: #5B9BD5;
    --color-primary-dark: #3B7BB5;
    --color-primary-light: #B8D4E8;
    --color-secondary: #A8ABAD;
    --color-success: #7FC97F;
    --color-warning: #F4A261;
    --color-danger: #E07A7A;

    /* Arrière-plans pastel */
    --color-bg: #FBF9F5;
    --color-surface: #FFFFFF;
    --color-surface-hover: #F5F2ED;

    /* Textes contrastés */
    --color-text: #3A3A3A;
    --color-text-light: #787878;

    /* Bordures douces */
    --color-border: #E8DDD0;
    --color-border-light: #F0E8DC;

    /* Ombres douces */
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.08);
    --shadow-md: 0 3px 8px -1px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 16px -3px rgba(0, 0, 0, 0.15);

    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;

    --border-radius: 0.5rem;
    --border-radius-lg: 0.75rem;

    /* Tailles tactiles minimales (WCAG) */
    --touch-target-min: 44px;
}

/* Reset et base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.5;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* En-tête */
.app-header {
    background-color: var(--color-primary);
    color: white;
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 100;
}

.app-header h1 {
    font-size: 1.5rem;
    font-weight: 600;
}

.header-actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* Boutons icône */
.btn-icon {
    background-color: rgba(255, 255, 255, 0.2);
    border: none;
    border-radius: var(--border-radius);
    color: white;
    cursor: pointer;
    min-width: var(--touch-target-min);
    min-height: var(--touch-target-min);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    transition: background-color 0.2s;
}

.btn-icon:hover,
.btn-icon:focus {
    background-color: rgba(255, 255, 255, 0.3);
    outline: none;
}

.btn-icon:active {
    background-color: rgba(255, 255, 255, 0.4);
}

/* Navigation par onglets */
.tabs {
    background-color: var(--color-surface);
    display: flex;
    border-bottom: 2px solid var(--color-border);
    position: sticky;
    top: 64px;
    z-index: 90;
    box-shadow: var(--shadow-sm);
}

.tab {
    flex: 1;
    background-color: transparent;
    border: none;
    padding: var(--spacing-md);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-text-light);
    font-size: 0.875rem;
    font-weight: 500;
    min-height: var(--touch-target-min);
    transition: all 0.2s;
}

.tab .icon {
    font-size: 1.5rem;
}

.tab:hover,
.tab:focus {
    background-color: var(--color-bg);
    outline: none;
}

.tab.active {
    color: var(--color-primary);
    border-bottom: 3px solid var(--color-primary);
}

/* Contenu principal */
.app-main {
    padding: var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
}

.panel {
    display: none;
}

.panel.active {
    display: block;
    animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.panel-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text);
}

.header-buttons {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

/* Boutons */
.btn-primary,
.btn-secondary,
.btn-export {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    min-height: var(--touch-target-min);
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary {
    background-color: var(--color-primary);
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover,
.btn-primary:focus {
    background-color: var(--color-primary-dark);
    box-shadow: var(--shadow-md);
    outline: none;
}

.btn-secondary {
    background-color: var(--color-surface);
    color: var(--color-text);
    border: 2px solid var(--color-border);
}

.btn-secondary:hover,
.btn-secondary:focus {
    background-color: var(--color-bg);
    border-color: var(--color-secondary);
    outline: none;
}

.btn-export {
    background-color: var(--color-surface);
    color: var(--color-text);
    border: 2px solid var(--color-border);
    width: 100%;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.btn-export:hover,
.btn-export:focus {
    background-color: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
    outline: none;
}

/* Barre de recherche */
.search-bar {
    margin-bottom: var(--spacing-lg);
}

.search-bar input {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: 1rem;
    min-height: var(--touch-target-min);
}

.search-bar input:focus {
    outline: none;
    border-color: var(--color-primary);
}

/* Liste des élèves */
.students-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.student-card {
    background-color: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    cursor: pointer;
    transition: all 0.2s;
    min-height: var(--touch-target-min);
}

.student-card:hover,
.student-card:focus {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
    outline: none;
    transform: translateY(-2px);
}

.student-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

.student-card .class {
    color: var(--color-text-light);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-sm);
}

.student-card .level {
    display: inline-block;
    background-color: var(--color-primary);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 600;
}

.student-card .stats {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
    display: flex;
    gap: var(--spacing-md);
    font-size: 0.875rem;
}

.student-card .stat-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

/* État vide */
.empty-state {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--color-text-light);
    font-size: 1.125rem;
}

/* Modals */
.modal {
    border: none;
    border-radius: var(--border-radius-lg);
    padding: 0;
    max-width: 90vw;
    max-height: 90vh;
    box-shadow: var(--shadow-lg);
}

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

.modal-large {
    max-width: 95vw;
    width: 800px;
}

.modal-content {
    display: flex;
    flex-direction: column;
    max-height: 90vh;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    border-bottom: 2px solid var(--color-border);
}

.modal-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
}

.btn-close {
    background-color: transparent;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    min-width: var(--touch-target-min);
    min-height: var(--touch-target-min);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius);
    color: var(--color-text-light);
}

.btn-close:hover,
.btn-close:focus {
    background-color: var(--color-bg);
    color: var(--color-text);
    outline: none;
}

.modal-body {
    padding: var(--spacing-lg);
    overflow-y: auto;
}

.modal-footer {
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
    margin-top: var(--spacing-lg);
}

/* Formulaires */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    color: var(--color-text);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: 1rem;
    min-height: var(--touch-target-min);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-primary);
}

/* Grilles de saisie tactile */
.tracking-section {
    background-color: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.tracking-section h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.level-grid,
.safety-grid,
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.level-btn,
.safety-btn,
.skill-btn {
    background-color: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    min-height: 60px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

.level-btn:hover,
.level-btn:focus,
.safety-btn:hover,
.safety-btn:focus,
.skill-btn:hover,
.skill-btn:focus {
    border-color: var(--color-primary);
    outline: none;
}

.level-btn.selected {
    background-color: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.safety-btn.checked,
.skill-btn.checked {
    background-color: var(--color-success);
    color: white;
    border-color: var(--color-success);
}

.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius);
    cursor: pointer;
    min-height: var(--touch-target-min);
}

.checkbox-item input[type="checkbox"] {
    width: 24px;
    height: 24px;
    cursor: pointer;
}

.checkbox-item label {
    flex: 1;
    cursor: pointer;
    font-size: 1rem;
}

.checkbox-item:hover,
.checkbox-item:focus-within {
    border-color: var(--color-primary);
}

/* Date input */
.input-date {
    padding: var(--spacing-md);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: 1rem;
    min-height: var(--touch-target-min);
}

.session-info {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

/* Statistiques */
.stats-content {
    display: grid;
    gap: var(--spacing-lg);
}

.stat-card {
    background-color: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
}

.stat-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
}

.progress-bar {
    width: 100%;
    height: 20px;
    background-color: var(--color-border);
    border-radius: 10px;
    overflow: hidden;
    margin-top: var(--spacing-sm);
}

.progress-fill {
    height: 100%;
    background-color: var(--color-primary);
    transition: width 0.3s ease;
}

/* Toast notifications */
.toast {
    position: fixed;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--color-text);
    color: white;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.toast.show {
    opacity: 1;
    pointer-events: auto;
}

.toast.success {
    background-color: var(--color-success);
}

.toast.error {
    background-color: var(--color-danger);
}

.toast.warning {
    background-color: var(--color-warning);
}

/* Export options */
.export-options {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

/* Responsive - Tablette 10 pouces optimisée */
@media (min-width: 768px) {
    .students-list {
        grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    }

    .level-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    }
}

/* Contraste élevé pour accessibilité */
@media (prefers-contrast: high) {
    :root {
        --color-border: #000000;
    }

    .btn-primary,
    .tab.active {
        border: 2px solid currentColor;
    }
}

/* Mode clair forcé - Mode sombre désactivé pour meilleure lisibilité */