:root {
    --bg-main: #f8fafc;
    --text-dark: #1e293b;
    --text-muted: #64748b;
    --white: #ffffff;
    --rev-primary: #d97706;
    --rev-dark: #b45309;
    --rev-light: #fef3c7;
    --rev-border: #fde68a;
    --success: #10b981;
    --danger: #ef4444;
    --line: #e2e8f0;
}

* { box-sizing: border-box; }

body {
    font-family: 'Plus Jakarta Sans', system-ui, sans-serif;
    background: var(--bg-main);
    color: var(--text-dark);
    margin: 0;
    padding: 0;
    padding-bottom: 60px;
}

a { color: var(--rev-primary); }

.container {
    max-width: 1080px;
    margin: 40px auto;
    padding: 0 20px;
}
.container.narrow { max-width: 960px; }

/* ---- HEADER (style "header-outil") ---- */
header.app-header {
    background: linear-gradient(135deg, var(--rev-primary) 0%, #f59e0b 100%);
    color: #fff;
    padding: 36px 20px;
    text-align: center;
    border-bottom-left-radius: 30px;
    border-bottom-right-radius: 30px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

header.app-header h1 { font-size: 2rem; font-weight: 800; margin: 0; }

header.app-header > div {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
}

header.app-header a {
    color: #fff;
    text-decoration: none;
    background: rgba(0,0,0,0.2);
    padding: 8px 16px;
    border-radius: 20px;
    font-weight: 700;
    font-size: 0.85rem;
    transition: background 0.2s;
}
header.app-header a:hover { background: rgba(0,0,0,0.32); }
header.app-header a.active { background: rgba(255,255,255,0.92); color: var(--rev-dark); }

/* ---- TEACHER TOPBAR ---- */
header.teacher-topbar {
    background: var(--white);
    border-bottom: 1px solid var(--line);
    position: sticky;
    top: 0;
    z-index: 50;
}
.teacher-topbar-inner {
    max-width: 1080px;
    margin: 0 auto;
    padding: 14px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}
.teacher-brand {
    font-weight: 800;
    font-size: 1.1rem;
    color: var(--text-dark);
    display: flex;
    align-items: center;
    gap: 8px;
}
.teacher-nav {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}
.teacher-nav a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 700;
    font-size: 0.85rem;
    padding: 8px 14px;
    border-radius: 8px;
    transition: background 0.15s, color 0.15s;
}
.teacher-nav a:hover { background: var(--bg-main); color: var(--text-dark); }
.teacher-nav a.active { background: var(--rev-light); color: var(--rev-dark); }
.teacher-nav a.logout { margin-left: 6px; color: var(--text-muted); font-weight: 600; }
.teacher-nav a.logout:hover { color: var(--danger); background: transparent; }

/* ---- TABS (sous-navigation admin) ---- */
.tabs {
    display: flex;
    gap: 4px;
    border-bottom: 1px solid var(--line);
    margin-bottom: 24px;
}
.tab {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 700;
    font-size: 0.88rem;
    padding: 10px 16px;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    transition: color 0.15s, border-color 0.15s;
}
.tab:hover { color: var(--text-dark); }
.tab.active { color: var(--rev-primary); border-bottom-color: var(--rev-primary); }

/* ---- TOGGLE / CHIPS ---- */
.toggle-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    border: 1px solid var(--line);
    cursor: pointer;
    background: #fff;
    color: var(--text-muted);
    transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.toggle-chip:hover { border-color: #cbd5e1; }
.toggle-chip.on { background: var(--rev-light); color: var(--rev-dark); border-color: var(--rev-border); }

/* ---- MODALS ---- */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.5);
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 20px;
}
.modal-overlay.open { display: flex; }
.modal {
    background: #fff;
    border-radius: 16px;
    padding: 24px;
    max-width: 480px;
    width: 100%;
    max-height: 90vh;
    overflow: auto;
    box-shadow: 0 20px 50px rgba(0,0,0,0.2);
}
.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}
.modal-header h2 { margin: 0; }
.modal-close {
    background: none;
    border: none;
    font-size: 1.3rem;
    cursor: pointer;
    color: var(--text-muted);
    line-height: 1;
    padding: 4px;
}
.modal-close:hover { color: var(--text-dark); }
.modal.wide { max-width: 640px; }

.link-btn {
    background: none;
    border: none;
    padding: 0;
    color: var(--rev-primary);
    font-weight: 700;
    font-size: inherit;
    font-family: inherit;
    cursor: pointer;
    text-decoration: none;
}
.link-btn:hover { color: var(--rev-dark); text-decoration: underline; }

/* ---- CARDS ---- */
.card {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 22px;
    margin-bottom: 20px;
    box-shadow: 0 1px 2px rgba(15, 23, 42, 0.03);
}

h2 { margin-top: 0; font-weight: 800; color: var(--text-dark); font-size: 1.15rem; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: middle; }
th { color: var(--text-muted); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; font-weight: 700; }
tbody tr:hover { background: var(--bg-main); }
tbody tr:last-child td { border-bottom: none; }

/* ---- BUTTONS ---- */
.btn {
    display: inline-block;
    background: var(--rev-primary);
    color: #fff;
    border: none;
    padding: 9px 16px;
    border-radius: 8px;
    font-weight: 700;
    cursor: pointer;
    text-decoration: none;
    font-size: 0.85rem;
    font-family: inherit;
    transition: background 0.15s, opacity 0.15s, border-color 0.15s;
    line-height: 1.3;
    border: 1px solid transparent;
}
.btn:hover { background: var(--rev-dark); color: #fff; }
.btn.secondary { background: #fff; color: var(--text-dark); border-color: var(--line); }
.btn.secondary:hover { background: var(--bg-main); border-color: #cbd5e1; }
.btn.danger { background: #fff; color: var(--danger); border-color: #fecaca; }
.btn.danger:hover { background: #fef2f2; border-color: var(--danger); }
.btn.small { padding: 6px 11px; font-size: 0.78rem; border-radius: 7px; }

/* Bouton icône discret (suppression, etc.) */
.icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border: none;
    border-radius: 7px;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.95rem;
    transition: background 0.15s, color 0.15s;
    text-decoration: none;
}
.icon-btn:hover { background: #fee2e2; color: var(--danger); }
.icon-btn.edit:hover { background: var(--rev-light); color: var(--rev-dark); }

/* Champ texte "inline" (édition directe sans ouvrir de formulaire) */
input.inline-edit {
    border: 1.5px solid transparent;
    background: transparent;
    padding: 6px 8px;
    border-radius: 7px;
    font-weight: 700;
    font-size: 0.95rem;
    width: auto;
    min-width: 140px;
    transition: border-color 0.15s, background 0.15s;
}
input.inline-edit:hover { background: #f1f5f9; }
input.inline-edit:focus { border-color: var(--rev-primary); background: #fff; }

/* ---- FORMS ---- */
label { display: block; margin: 12px 0 4px; font-weight: 700; font-size: 0.85rem; color: var(--text-dark); }
input[type=text], input[type=password], input[type=number], input[type=file], textarea, select {
    width: 100%;
    padding: 9px 12px;
    border: 1px solid var(--line);
    border-radius: 8px;
    font-size: 0.95rem;
    font-family: inherit;
    background: #fff;
    color: var(--text-dark);
}
input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--rev-primary);
    box-shadow: 0 0 0 3px var(--rev-light);
}
textarea { min-height: 160px; font-family: monospace; }

.alert {
    padding: 12px 16px;
    border-radius: 10px;
    margin-bottom: 16px;
    font-weight: 600;
    border: 1px solid transparent;
}
.alert.error { background: #fef2f2; color: #991b1b; border-color: #fecaca; }
.alert.success { background: #f0fdf4; color: #166534; border-color: #bbf7d0; }

/* ---- PROGRESS ---- */
.progress-bar {
    height: 10px;
    background: #e2e8f0;
    border-radius: 6px;
    overflow: hidden;
}
.progress-bar > div {
    height: 100%;
    background: var(--rev-primary);
    border-radius: 6px;
    transition: width 0.3s ease;
}
.progress-cell { min-width: 150px; }
.progress-label { display:block; margin-top:4px; font-size:0.82rem; color: var(--text-dark); }
.progress-pct { color: var(--text-muted); }

/* ---- FILTER BAR ---- */
.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    align-items: flex-end;
    padding: 14px;
    margin: 14px 0 18px;
    background: var(--bg-main);
    border: 1px solid var(--line);
    border-radius: 12px;
}
.filter-field { display: flex; flex-direction: column; gap: 4px; }
.filter-field label { font-size: 0.78rem; font-weight: 700; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.04em; }
.filter-field select { margin: 0; }
.filter-field-checkbox { justify-content: center; }
.filter-field-checkbox label {
    display: flex; align-items: center; gap: 6px;
    font-size: 0.85rem; font-weight: 600; text-transform: none; letter-spacing: normal; color: var(--text-dark);
    cursor: pointer;
}
.filter-field-checkbox input { width: auto; margin: 0; }

/* ---- PROGRESS TABLE ---- */
.progress-table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 12px; }
.progress-table { margin: 0; }
.progress-table th, .progress-table td { white-space: nowrap; }
.progress-table .progress-cell { white-space: normal; }
.progress-table thead th { background: var(--bg-main); }
.sticky-col { position: sticky; left: 0; background: var(--white); z-index: 1; }
.progress-table thead th.sticky-col { background: var(--bg-main); }

.student-cell {
    display: flex; align-items: center; gap: 10px;
    background: none; border: none; padding: 4px 0; cursor: pointer; text-align: left; font-family: inherit;
}

/* ---- CHAPTER PROGRESS (fiche élève) ---- */
.chapter-progress { margin-bottom: 14px; }
.chapter-progress-toggle {
    display: flex; justify-content: space-between; align-items: center; gap: 12px;
    width: 100%; background: none; border: none; padding: 0 0 4px; cursor: pointer; font-family: inherit; text-align: left;
}
.chapter-progress-toggle:hover .chapter-progress-name { color: var(--rev-primary); }
.chapter-progress-name { font-weight: 700; }
.chapter-progress-name .chevron { display: inline-block; width: 14px; font-size: 0.7rem; color: var(--text-muted); }
.chapter-detail {
    margin: 10px 0 0 22px;
    padding: 10px 12px;
    background: var(--bg-main);
    border: 1px solid var(--line);
    border-radius: 10px;
}
.detail-table { margin: 0; }
.detail-table th, .detail-table td { padding: 6px 10px; font-size: 0.85rem; }
.detail-table thead th { font-size: 0.68rem; }

/* ---- FLASHCARD ---- */
.flashcard {
    text-align: center;
    padding: 40px 20px;
}
.flashcard .word {
    font-size: 2.4rem;
    font-weight: 800;
    margin-bottom: 24px;
    color: var(--rev-primary);
}
.flashcard input[type=text] {
    text-align: center;
    font-size: 1.2rem;
    max-width: 320px;
    margin: 0 auto 16px;
}
.feedback {
    font-weight: 700;
    margin-top: 12px;
    min-height: 1.4em;
}
.feedback.correct { color: var(--success); }
.feedback.wrong { color: var(--danger); }

/* ---- STATS ---- */
.stats {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}
.stat-box {
    flex: 1;
    min-width: 120px;
    background: #fff;
    border-radius: 14px;
    padding: 14px;
    text-align: center;
    box-shadow: 0 4px 12px rgba(0,0,0,0.04);
}
.stat-box .num { font-size: 1.6rem; font-weight: 800; color: var(--rev-primary); }
.stat-box .label { font-size: 0.8rem; color: var(--text-muted); }

.stat-box.big {
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 22px 14px;
}
.stat-box.big .num { font-size: 2.2rem; }
.stat-box.big .icon { font-size: 1.6rem; }
.stat-box.orange { background: var(--rev-light); border: 1px solid var(--rev-border); }
.stat-box.orange .num { color: var(--rev-dark); }
.stat-box.blue { background: #e0f2fe; border: 1px solid #bae6fd; }
.stat-box.blue .num { color: #0369a1; }
.stat-box.green { background: #d1fae5; border: 1px solid #a7f3d0; }
.stat-box.green .num { color: #047857; }
.stat-box.purple { background: #ede9fe; border: 1px solid #ddd6fe; }
.stat-box.purple .num { color: #6d28d9; }
.stat-box.pink { background: #fce7f3; border: 1px solid #fbcfe8; }
.stat-box.pink .num { color: #be185d; }

/* ---- STUDENT PHOTOS ---- */
.student-photo {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--rev-border);
    vertical-align: middle;
}
.student-photo.large {
    width: 110px;
    height: 110px;
    border-radius: 16px;
}

/* ---- COURSE BADGE ---- */
.badge {
    display: inline-block;
    background: var(--rev-light);
    color: var(--rev-dark);
    border-radius: 20px;
    padding: 3px 12px;
    font-size: 0.78rem;
    font-weight: 700;
}

.toolbar {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    align-items: center;
    margin-bottom: 16px;
}

.admin-link {
    position: fixed;
    bottom: 10px;
    right: 14px;
    font-size: 0.72rem;
    color: var(--text-muted);
    opacity: 0.6;
    text-decoration: none;
}
.admin-link:hover { opacity: 1; }