/* ═══════════════════════════════════════
   Je Speak Anglais — Feuille de style principale
   Design : Mobile-First, Riviera Chic
   ═══════════════════════════════════════ */

/* ─── Variables ─── */
:root {
    --primary: #2563EB;
    --primary-dark: #1D4ED8;
    --primary-light: #DBEAFE;
    --primary-50: #EFF6FF;
    --secondary: #7C3AED;
    --secondary-light: #EDE9FE;
    --success: #059669;
    --success-light: #D1FAE5;
    --danger: #DC2626;
    --danger-light: #FEE2E2;
    --warning: #D97706;
    --warning-light: #FEF3C7;
    --info: #0891B2;
    --info-light: #CFFAFE;
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;
    --white: #FFFFFF;
    --radius-sm: 6px;
    --radius: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 4px 16px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
    --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    --transition: 0.25s ease;
    --navbar-height: 60px;
}

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

body {
    font-family: var(--font);
    background: var(--gray-50);
    color: var(--gray-900);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-dark); }

img { max-width: 100%; height: auto; }

/* ═══════════════════════════════════════
   POPUP NOTIFICATION (remplace les alert JS)
   ═══════════════════════════════════════ */

.popup-notification {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10000;
    padding: 14px 24px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 300px;
    max-width: 90vw;
    box-shadow: var(--shadow-lg);
    animation: popupSlideIn 0.4s ease-out;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
}

.popup-notification.popup-hide {
    animation: popupSlideOut 0.3s ease-in forwards;
}

.popup-success { background: var(--success); color: var(--white); }
.popup-error { background: var(--danger); color: var(--white); }
.popup-warning { background: var(--warning); color: var(--white); }
.popup-info { background: var(--info); color: var(--white); }

.popup-icon { font-size: 1.2rem; flex-shrink: 0; }
.popup-text { flex: 1; }
.popup-close { opacity: 0.7; font-size: 1.1rem; flex-shrink: 0; }
.popup-close:hover { opacity: 1; }

@keyframes popupSlideIn {
    from { opacity: 0; transform: translateX(-50%) translateY(-30px); }
    to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

@keyframes popupSlideOut {
    from { opacity: 1; transform: translateX(-50%) translateY(0); }
    to { opacity: 0; transform: translateX(-50%) translateY(-30px); }
}

/* ═══ POPUP MODAL (remplace confirm/prompt JS) ═══ */

.popup-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 10001;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    backdrop-filter: blur(4px);
    animation: fadeIn 0.2s ease;
}

.popup-modal {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 32px;
    max-width: 420px;
    width: 100%;
    text-align: center;
    box-shadow: var(--shadow-lg);
    animation: modalPop 0.3s ease-out;
}

.popup-modal-icon { font-size: 3rem; margin-bottom: 16px; }
.popup-modal-title { font-size: 1.2rem; font-weight: 700; color: var(--gray-900); margin-bottom: 8px; }
.popup-modal-message { font-size: 0.9rem; color: var(--gray-500); margin-bottom: 24px; line-height: 1.5; }
.popup-modal-actions { display: flex; gap: 10px; justify-content: center; }

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes modalPop {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}

/* ═══════════════════════════════════════
   NAVBAR
   ═══════════════════════════════════════ */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--navbar-height);
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.navbar-container {
    max-width: 1200px;
    margin: 0 auto;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--gray-900);
}

.navbar-logo {
    width: 36px;
    height: 36px;
    border-radius: 8px;
}

.navbar-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary);
}

.navbar-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Language Switch */
.lang-switch {
    display: flex;
    background: var(--gray-100);
    border-radius: 20px;
    padding: 2px;
}

.lang-btn {
    padding: 4px 12px;
    border-radius: 18px;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--gray-500);
    text-decoration: none;
    transition: all var(--transition);
}

.lang-btn.active {
    background: var(--primary);
    color: var(--white);
}

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

.user-menu-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 8px 4px 4px;
    border: none;
    background: var(--gray-100);
    border-radius: 24px;
    cursor: pointer;
    transition: background var(--transition);
}

.user-menu-toggle:hover { background: var(--gray-200); }

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--primary);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.85rem;
}

.user-name-nav {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--gray-700);
    max-width: 100px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.chevron { font-size: 0.7rem; color: var(--gray-400); }

.user-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    min-width: 200px;
    padding: 6px 0;
    display: none;
    z-index: 1001;
    border: 1px solid var(--gray-200);
}

.user-dropdown.show { display: block; animation: fadeIn 0.15s ease; }

.dropdown-item {
    display: block;
    padding: 10px 16px;
    font-size: 0.9rem;
    color: var(--gray-700);
    text-decoration: none;
    transition: background var(--transition);
}

.dropdown-item:hover { background: var(--gray-50); color: var(--gray-900); }
.dropdown-item.text-danger { color: var(--danger); }
.dropdown-item.text-danger:hover { background: var(--danger-light); }
.dropdown-divider { height: 1px; background: var(--gray-200); margin: 4px 0; }

/* ═══════════════════════════════════════
   MAIN CONTENT
   ═══════════════════════════════════════ */

.main-content {
    margin-top: var(--navbar-height);
    min-height: calc(100vh - var(--navbar-height));
    padding: 20px 16px;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

/* ═══════════════════════════════════════
   CARDS
   ═══════════════════════════════════════ */

.card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
    overflow: hidden;
    transition: box-shadow var(--transition);
}

.card:hover { box-shadow: var(--shadow); }

.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-header h2, .card-header h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--gray-900);
}

.card-body { padding: 20px; }
.card-footer { padding: 16px 20px; border-top: 1px solid var(--gray-200); }

/* ═══════════════════════════════════════
   BUTTONS
   ═══════════════════════════════════════ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 22px;
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    line-height: 1.4;
    white-space: nowrap;
}

.btn:active { transform: scale(0.97); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.btn-primary { background: var(--primary); color: var(--white); }
.btn-primary:hover { background: var(--primary-dark); color: var(--white); }

.btn-secondary { background: var(--gray-200); color: var(--gray-700); }
.btn-secondary:hover { background: var(--gray-300); }

.btn-success { background: var(--success); color: var(--white); }
.btn-success:hover { background: #047857; color: var(--white); }

.btn-danger { background: var(--danger); color: var(--white); }
.btn-danger:hover { background: #B91C1C; color: var(--white); }

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

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}
.btn-outline:hover { background: var(--primary); color: var(--white); }

.btn-sm { padding: 6px 14px; font-size: 0.8rem; }
.btn-lg { padding: 14px 32px; font-size: 1rem; }
.btn-block { width: 100%; }
.btn-icon { width: 40px; height: 40px; padding: 0; border-radius: 50%; }
.btn-icon.btn-lg { width: 56px; height: 56px; font-size: 1.3rem; }

/* ═══════════════════════════════════════
   FORMS
   ═══════════════════════════════════════ */

.form-group { margin-bottom: 18px; }

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 6px;
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 0.95rem;
    color: var(--gray-900);
    background: var(--white);
    transition: border-color var(--transition);
    outline: none;
}

.form-control:focus { border-color: var(--primary); }
.form-control::placeholder { color: var(--gray-400); }

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236B7280' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

textarea.form-control { resize: vertical; min-height: 80px; }

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.form-hint {
    font-size: 0.8rem;
    color: var(--gray-400);
    margin-top: 4px;
}

/* ═══════════════════════════════════════
   BADGES
   ═══════════════════════════════════════ */

.badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
}

.badge-success { background: var(--success-light); color: var(--success); }
.badge-warning { background: var(--warning-light); color: var(--warning); }
.badge-danger { background: var(--danger-light); color: var(--danger); }
.badge-info { background: var(--info-light); color: var(--info); }
.badge-primary { background: var(--primary-light); color: var(--primary); }

/* ═══════════════════════════════════════
   TABLE
   ═══════════════════════════════════════ */

.table-responsive { overflow-x: auto; -webkit-overflow-scrolling: touch; }

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.table th, .table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
}

.table th {
    background: var(--gray-50);
    font-weight: 700;
    color: var(--gray-600);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.table tbody tr { transition: background var(--transition); }
.table tbody tr:hover { background: var(--gray-50); }

/* ═══════════════════════════════════════
   AUTH PAGES (Login / Register)
   ═══════════════════════════════════════ */

.auth-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.auth-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 440px;
    overflow: hidden;
}

.auth-header {
    text-align: center;
    padding: 32px 32px 20px;
}

.auth-header img {
    width: 72px;
    height: 72px;
    border-radius: 16px;
    margin-bottom: 16px;
}

.auth-header h1 {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: 4px;
}

.auth-header p {
    color: var(--gray-500);
    font-size: 0.9rem;
}

.auth-body { padding: 0 32px 32px; }

.auth-footer {
    text-align: center;
    padding: 16px 32px;
    background: var(--gray-50);
    border-top: 1px solid var(--gray-200);
    font-size: 0.85rem;
    color: var(--gray-500);
}

.auth-footer a { font-weight: 600; }

/* ═══════════════════════════════════════
   GRID LAYOUT
   ═══════════════════════════════════════ */

.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ═══════════════════════════════════════
   STAT CARDS (Dashboard)
   ═══════════════════════════════════════ */

.stat-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 20px;
    border: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    gap: 16px;
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    flex-shrink: 0;
}

.stat-icon.blue { background: var(--primary-light); }
.stat-icon.green { background: var(--success-light); }
.stat-icon.purple { background: var(--secondary-light); }
.stat-icon.orange { background: var(--warning-light); }

.stat-value { font-size: 1.5rem; font-weight: 800; color: var(--gray-900); line-height: 1.2; }
.stat-label { font-size: 0.8rem; color: var(--gray-500); }

/* ═══════════════════════════════════════
   EMPTY STATE
   ═══════════════════════════════════════ */

.empty-state {
    text-align: center;
    padding: 48px 20px;
    color: var(--gray-400);
}

.empty-state .empty-icon { font-size: 3rem; margin-bottom: 12px; }
.empty-state p { font-size: 0.9rem; }

/* ═══════════════════════════════════════
   UTILITIES
   ═══════════════════════════════════════ */

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--gray-500); }
.text-danger { color: var(--danger); }
.text-success { color: var(--success); }
.text-small { font-size: 0.8rem; }
.font-bold { font-weight: 700; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-wrap { flex-wrap: wrap; }
.hidden { display: none !important; }

/* ═══════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════ */

@media (max-width: 768px) {
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .navbar-title { display: none; }
    .user-name-nav { display: none; }
    .main-content { padding: 16px 12px; }
    .card-body { padding: 16px; }
    
    .table th, .table td {
        padding: 8px 10px;
        font-size: 0.8rem;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 769px) {
    .grid-2-md { grid-template-columns: repeat(2, 1fr); }
}