/* ============================================================
   Formation IA Ezway — Design System
   ============================================================ */

:root {
    --primary: #1976D2;
    --primary-dark: #1565C0;
    --primary-light: #E3F2FD;
    --accent: #FF6B35;
    --success: #4CAF50;
    --warning: #FF9800;
    --danger: #E53935;
    --gray-50: #F6F8FA;
    --gray-100: #ECEFF1;
    --gray-200: #CFD8DC;
    --gray-500: #607D8B;
    --gray-700: #37474F;
    --gray-900: #1A2332;
    --text: #2C3E50;
    --bg: #FAFBFC;
    --code-bg: #2D3748;
    --code-fg: #E2E8F0;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
    --radius: 12px;
    --radius-sm: 8px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
    background: var(--bg);
    color: var(--text);
    margin: 0;
    line-height: 1.6;
    font-size: 16px;
}

/* ============================================================
   NAVBAR
   ============================================================ */

.navbar {
    background: white;
    border-bottom: 1px solid var(--gray-200);
    padding: 16px 32px;
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow-sm);
}

.navbar-brand {
    font-weight: 800;
    font-size: 18px;
    color: var(--primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
}

.navbar-brand::before {
    content: "🎓";
    font-size: 24px;
}

.navbar-links {
    display: flex;
    gap: 24px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.navbar-links a {
    color: var(--gray-700);
    text-decoration: none;
    font-weight: 500;
    font-size: 14px;
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    transition: all 0.2s;
}

.navbar-links a:hover {
    background: var(--primary-light);
    color: var(--primary);
}

.navbar-links a.active {
    background: var(--primary);
    color: white;
}

/* ============================================================
   LAYOUT
   ============================================================ */

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 40px 32px;
}

.hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 60px 32px;
    text-align: center;
    border-radius: var(--radius);
    margin-bottom: 40px;
    box-shadow: var(--shadow-md);
}

.hero h1 {
    font-size: 42px;
    margin: 0 0 12px;
    font-weight: 800;
}

.hero p {
    font-size: 18px;
    opacity: 0.95;
    max-width: 700px;
    margin: 0 auto;
}

.hero .meta {
    margin-top: 24px;
    display: flex;
    gap: 32px;
    justify-content: center;
    flex-wrap: wrap;
    font-size: 14px;
}

.hero .meta-item {
    background: rgba(255,255,255,0.15);
    padding: 8px 16px;
    border-radius: 20px;
    backdrop-filter: blur(10px);
}

/* ============================================================
   TYPOGRAPHY
   ============================================================ */

h1, h2, h3, h4 {
    color: var(--gray-900);
    font-weight: 700;
    line-height: 1.3;
}

h1 { font-size: 36px; margin: 40px 0 16px; }
h2 {
    font-size: 26px;
    margin: 40px 0 16px;
    padding-bottom: 8px;
    border-bottom: 3px solid var(--primary);
    display: inline-block;
}
h3 { font-size: 20px; margin: 28px 0 12px; color: var(--primary); }
h4 { font-size: 17px; margin: 20px 0 8px; }

p { margin: 0 0 16px; }

ul, ol { padding-left: 24px; margin: 0 0 16px; }
li { margin-bottom: 6px; }

a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
}
a:hover { text-decoration: underline; }

strong { font-weight: 700; color: var(--gray-900); }

/* ============================================================
   CARDS
   ============================================================ */

.card {
    background: white;
    border-radius: var(--radius);
    padding: 28px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 24px;
    border: 1px solid var(--gray-100);
}

.card h2:first-child,
.card h3:first-child {
    margin-top: 0;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin: 24px 0;
}

.module-card {
    background: white;
    border-radius: var(--radius);
    padding: 28px;
    box-shadow: var(--shadow-sm);
    border-left: 5px solid var(--primary);
    transition: transform 0.2s, box-shadow 0.2s;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    display: block;
}

.module-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    text-decoration: none;
}

.module-card .icon {
    font-size: 36px;
    margin-bottom: 8px;
}

.module-card .module-num {
    font-size: 12px;
    color: var(--primary);
    font-weight: 700;
    letter-spacing: 1.2px;
    text-transform: uppercase;
}

.module-card h3 {
    margin: 8px 0;
    color: var(--gray-900);
}

.module-card .duration {
    display: inline-block;
    background: var(--primary-light);
    color: var(--primary-dark);
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
    margin-top: 8px;
}

/* ============================================================
   BOXES (info/warning/danger/success)
   ============================================================ */

.box {
    border-radius: var(--radius-sm);
    padding: 16px 20px;
    margin: 20px 0;
    border-left: 4px solid;
    display: flex;
    gap: 12px;
    align-items: flex-start;
}

.box .box-icon {
    font-size: 24px;
    flex-shrink: 0;
    line-height: 1;
}

.box .box-content {
    flex: 1;
}

.box .box-title {
    font-weight: 700;
    margin: 0 0 4px;
}

.box .box-content p:last-child {
    margin: 0;
}

.box.info {
    background: #E3F2FD;
    border-color: #2196F3;
    color: #0D47A1;
}

.box.success {
    background: #E8F5E9;
    border-color: #4CAF50;
    color: #1B5E20;
}

.box.warning {
    background: #FFF3E0;
    border-color: #FF9800;
    color: #E65100;
}

.box.danger {
    background: #FFEBEE;
    border-color: #E53935;
    color: #B71C1C;
}

.box.tip {
    background: #F3E5F5;
    border-color: #9C27B0;
    color: #4A148C;
}

/* ============================================================
   CODE
   ============================================================ */

code {
    background: var(--gray-100);
    color: var(--danger);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: "SF Mono", Monaco, Consolas, monospace;
    font-size: 0.9em;
}

pre {
    background: var(--code-bg);
    color: var(--code-fg);
    padding: 20px;
    border-radius: var(--radius-sm);
    overflow-x: auto;
    font-family: "SF Mono", Monaco, Consolas, monospace;
    font-size: 14px;
    line-height: 1.5;
    margin: 16px 0;
}

pre code {
    background: none;
    color: inherit;
    padding: 0;
    border-radius: 0;
}

/* ============================================================
   TABLES
   ============================================================ */

table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    background: white;
    border-radius: var(--radius-sm);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

th {
    background: var(--primary);
    color: white;
    padding: 14px 16px;
    text-align: left;
    font-weight: 600;
    font-size: 14px;
}

td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--gray-100);
}

tr:last-child td {
    border-bottom: none;
}

tr:hover td {
    background: var(--gray-50);
}

/* ============================================================
   PROMPT EXAMPLES (Good vs Bad)
   ============================================================ */

.prompt-compare {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin: 20px 0;
}

.prompt-bad, .prompt-good {
    padding: 20px;
    border-radius: var(--radius-sm);
    font-family: "SF Mono", Monaco, Consolas, monospace;
    font-size: 14px;
    line-height: 1.5;
    border: 2px solid;
}

.prompt-bad {
    background: #FFEBEE;
    border-color: var(--danger);
    color: #B71C1C;
}

.prompt-bad::before {
    content: "❌ MAUVAIS";
    display: block;
    font-weight: 700;
    margin-bottom: 8px;
    font-size: 12px;
    letter-spacing: 1px;
}

.prompt-good {
    background: #E8F5E9;
    border-color: var(--success);
    color: #1B5E20;
}

.prompt-good::before {
    content: "✅ BON";
    display: block;
    font-weight: 700;
    margin-bottom: 8px;
    font-size: 12px;
    letter-spacing: 1px;
}

@media (max-width: 768px) {
    .prompt-compare { grid-template-columns: 1fr; }
}

/* ============================================================
   PROGRESS BAR
   ============================================================ */

.progress {
    display: flex;
    gap: 8px;
    margin: 32px 0;
}

.progress-step {
    flex: 1;
    padding: 12px;
    background: var(--gray-100);
    border-radius: var(--radius-sm);
    text-align: center;
    font-size: 13px;
    font-weight: 600;
    color: var(--gray-500);
}

.progress-step.active {
    background: var(--primary);
    color: white;
}

.progress-step.done {
    background: var(--success);
    color: white;
}

/* ============================================================
   BADGES
   ============================================================ */

.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.badge-primary { background: var(--primary-light); color: var(--primary-dark); }
.badge-success { background: #E8F5E9; color: #1B5E20; }
.badge-warning { background: #FFF3E0; color: #E65100; }
.badge-danger { background: #FFEBEE; color: #B71C1C; }

/* ============================================================
   EXERCICE BLOCK
   ============================================================ */

.exercise {
    background: linear-gradient(135deg, #FFF8E1 0%, #FFFDE7 100%);
    border: 2px dashed var(--warning);
    border-radius: var(--radius);
    padding: 24px;
    margin: 24px 0;
}

.exercise-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.exercise-header .icon {
    font-size: 28px;
}

.exercise-header h3 {
    margin: 0;
    color: #E65100;
}

.exercise-header .duration {
    margin-left: auto;
    background: var(--warning);
    color: white;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}

/* ============================================================
   FOOTER
   ============================================================ */

.footer {
    text-align: center;
    padding: 40px 32px;
    color: var(--gray-500);
    font-size: 14px;
    border-top: 1px solid var(--gray-100);
    margin-top: 60px;
}

.footer a {
    color: var(--primary);
}

/* ============================================================
   NAV BUTTONS (prev/next module)
   ============================================================ */

.module-nav {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    margin-top: 40px;
}

.module-nav a {
    flex: 1;
    padding: 20px;
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    text-decoration: none;
    color: var(--text);
    transition: all 0.2s;
    border: 1px solid var(--gray-100);
}

.module-nav a:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
    text-decoration: none;
}

.module-nav .nav-label {
    font-size: 12px;
    color: var(--gray-500);
    margin-bottom: 4px;
}

.module-nav .nav-title {
    font-weight: 600;
    color: var(--primary);
}

.module-nav .nav-next {
    text-align: right;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 768px) {
    .navbar { padding: 12px 16px; flex-direction: column; gap: 12px; }
    .navbar-links { flex-wrap: wrap; justify-content: center; }
    .container { padding: 20px 16px; }
    .hero h1 { font-size: 28px; }
    .hero { padding: 40px 20px; }
    .card { padding: 20px; }
    h1 { font-size: 26px; }
    h2 { font-size: 22px; }
}

/* Print friendly */
@media print {
    .navbar, .module-nav, .footer { display: none; }
    .card, .box, .exercise { break-inside: avoid; box-shadow: none; border: 1px solid var(--gray-200); }
    body { background: white; }
}

/* ============================================================
   QUIZ FORM (interactive)
   ============================================================ */

.user-banner {
    background: var(--gray-50);
    padding: 8px 16px;
    text-align: center;
    font-size: 14px;
    border-bottom: 1px solid var(--gray-100);
}

.user-banner .user-name {
    color: var(--primary);
    font-weight: 600;
}

.user-banner a {
    color: var(--gray-500);
    text-decoration: none;
}

.user-banner a:hover {
    text-decoration: underline;
}

.quiz-form {
    background: white;
    padding: 28px;
    border-radius: var(--radius);
    margin: 20px 0;
    box-shadow: var(--shadow-sm);
    border: 2px solid var(--primary-light);
}

.quiz-form h3 {
    margin-top: 0;
    color: var(--primary);
}

.quiz-question {
    margin-bottom: 28px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--gray-100);
}

.quiz-question:last-of-type {
    border-bottom: none;
    margin-bottom: 16px;
}

.quiz-question h4 {
    margin: 0 0 14px;
    color: var(--text);
    font-size: 16px;
}

.quiz-choice {
    display: block;
    padding: 12px 16px;
    margin: 8px 0;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s;
    background: white;
}

.quiz-choice:hover {
    border-color: var(--primary);
    background: var(--primary-light);
}

.quiz-choice input {
    margin-right: 12px;
    cursor: pointer;
}

.quiz-choice.correct {
    border-color: var(--success);
    background: #E8F5E9;
    font-weight: 600;
}

.quiz-choice.correct::after {
    content: " ✅";
}

.quiz-choice.wrong {
    border-color: var(--danger);
    background: #FFEBEE;
    font-weight: 600;
}

.quiz-choice.wrong::after {
    content: " ❌";
}

.quiz-submit {
    background: var(--primary);
    color: white;
    padding: 14px 32px;
    border: none;
    border-radius: var(--radius-sm);
    font-weight: 600;
    cursor: pointer;
    font-size: 16px;
    transition: background 0.2s;
}

.quiz-submit:hover:not(:disabled) {
    background: var(--primary-dark);
}

.quiz-submit:disabled {
    opacity: 0.5;
    cursor: wait;
}

.quiz-result {
    background: var(--primary-light);
    padding: 24px;
    border-radius: var(--radius-sm);
    margin-top: 24px;
    text-align: center;
}

.quiz-score-big {
    font-size: 56px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
}

.module-status {
    display: inline-block;
    margin-left: 8px;
    padding: 3px 10px;
    border-radius: 10px;
    font-size: 11px;
    font-weight: 600;
}

.module-status.done {
    background: #E8F5E9;
    color: #1B5E20;
}

.module-status.in-progress {
    background: #FFF3E0;
    color: #E65100;
}

.module-status.pending {
    background: var(--gray-100);
    color: var(--gray-500);
}