:root {
    --bg-primary: #0a0e17;
    --bg-secondary: #111827;
    --bg-card: #1a2332;
    --bg-card-hover: #1f2b3d;
    --bg-nav: rgba(10, 14, 23, 0.95);
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent: #ff3434;
    --accent-dim: #cc2a2a;
    --accent-glow: rgba(255, 52, 52, 0.15);
    --accent-orange: #f59e0b;
    --accent-cyan: #06b6d4;
    --accent-green: #10b981;
    --accent-purple: #8b5cf6;
    --border: #1e293b;
    --border-light: #334155;
    --gradient-start: #ff3434;
    --gradient-end: #ff6b35;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
    --radius: 12px;
    --radius-sm: 10px;
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
    font-family: 'Inter', -apple-system, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
}

a { color: var(--accent); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent-dim); }

code {
    font-family: 'JetBrains Mono', monospace;
    background: rgba(255, 52, 52, 0.1);
    color: var(--accent);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.85em;
}

pre {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 20px;
    overflow-x: auto;
    margin: 16px 0;
}

pre code {
    background: none;
    padding: 0;
    color: var(--text-primary);
    font-size: 0.85em;
    line-height: 1.8;
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ============ NAVBAR ============ */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: var(--bg-nav);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    padding: 0 24px;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary) !important;
}

.logo-icon {
    background: var(--accent);
    color: #fff;
    padding: 4px 10px;
    border-radius: 6px;
    font-family: 'JetBrains Mono', monospace;
    font-weight: 700;
    font-size: 1.1rem;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    color: var(--text-secondary) !important;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 0.9rem;
    transition: var(--transition);
}

.nav-link:hover, .nav-link.active {
    color: var(--text-primary) !important;
    background: rgba(255, 52, 52, 0.1);
}

.nav-dropdown { position: relative; }
.dropdown-content {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    min-width: 200px;
    padding: 8px;
    box-shadow: var(--shadow);
    z-index: 1001;
}
.nav-dropdown:hover .dropdown-content { display: block; }
.dropdown-content a {
    display: block;
    padding: 8px 16px;
    color: var(--text-secondary) !important;
    border-radius: 6px;
    font-size: 0.9rem;
}
.dropdown-content a:hover {
    background: rgba(255, 52, 52, 0.1);
    color: var(--text-primary) !important;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}
.hamburger span {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* ============ HERO ============ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    padding: 120px 24px 80px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
    z-index: 0;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 50%, rgba(255, 52, 52, 0.08) 0%, transparent 50%),
                radial-gradient(circle at 70% 50%, rgba(255, 107, 53, 0.06) 0%, transparent 50%);
    animation: heroGlow 15s ease-in-out infinite alternate;
}

@keyframes heroGlow {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(10deg); }
}

.hero-content { position: relative; z-index: 1; max-width: 800px; }

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    border-radius: 30px;
    background: rgba(255, 52, 52, 0.1);
    border: 1px solid rgba(255, 52, 52, 0.3);
    color: var(--accent);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 24px;
    letter-spacing: 0.5px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1.15;
    margin-bottom: 20px;
}

.highlight {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 40px;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 48px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.stat { text-align: center; }
.stat-number {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--accent);
    display: block;
}
.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 14px 32px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: #fff;
    box-shadow: 0 4px 20px rgba(255, 52, 52, 0.3);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(255, 52, 52, 0.4);
    color: #fff;
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--border-light);
    color: var(--text-primary);
}
.btn-outline:hover {
    border-color: var(--accent);
    background: rgba(255, 52, 52, 0.05);
    color: var(--text-primary);
}

/* ============ SECTIONS ============ */
.section {
    padding: 80px 0;
}

.section-title {
    font-size: 2.2rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 12px;
}

.section-desc {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 48px;
    font-size: 1.05rem;
}

/* ============ COURSE CARDS ============ */
.course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.course-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.course-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--gradient-start), var(--gradient-end));
    opacity: 0;
    transition: var(--transition);
}

.course-card:hover {
    transform: translateY(-4px);
    border-color: rgba(255, 52, 52, 0.3);
    box-shadow: 0 8px 32px rgba(255, 52, 52, 0.1);
}
.course-card:hover::before { opacity: 1; }

.course-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.course-icon { font-size: 2rem; }

.course-tag {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.course-tag.beginner { background: rgba(16, 185, 129, 0.15); color: var(--accent-green); }
.course-tag.intermediate { background: rgba(245, 158, 11, 0.15); color: var(--accent-orange); }
.course-tag.expert { background: rgba(255, 52, 52, 0.15); color: var(--accent); }

.course-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.course-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ============ LESSON LIST ============ */
.lesson-list {
    list-style: none;
    padding: 0;
}

.lesson-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin-bottom: 8px;
    background: var(--bg-card);
    transition: var(--transition);
    cursor: pointer;
}

.lesson-item:hover {
    border-color: rgba(255, 52, 52, 0.3);
    background: var(--bg-card-hover);
}

.lesson-num {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255, 52, 52, 0.1);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.85rem;
    flex-shrink: 0;
}

.lesson-info { flex: 1; }
.lesson-info h4 { font-size: 1rem; font-weight: 600; }
.lesson-info p { font-size: 0.85rem; color: var(--text-muted); margin-top: 2px; }

.lesson-duration {
    font-size: 0.8rem;
    color: var(--text-muted);
    white-space: nowrap;
}

/* ============ LESSON CONTENT ============ */
.lesson-content {
    display: none;
    padding: 24px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin-top: 8px;
    margin-bottom: 16px;
}

.lesson-content.active { display: block; }

.lesson-content h4 {
    font-size: 1.1rem;
    margin-bottom: 12px;
    color: var(--accent);
}

.lesson-content p {
    color: var(--text-secondary);
    margin-bottom: 12px;
    line-height: 1.7;
}

.lesson-content ul {
    padding-left: 20px;
    margin-bottom: 16px;
}

.lesson-content li {
    color: var(--text-secondary);
    margin-bottom: 6px;
}

/* ============ TERMINAL ============ */
.terminal-container {
    max-width: 900px;
    margin: 0 auto;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.terminal-header {
    background: #1a1a2e;
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    border-bottom: 1px solid var(--border);
}

.terminal-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}
.terminal-dot.red { background: #ff5f56; }
.terminal-dot.yellow { background: #ffbd2e; }
.terminal-dot.green { background: #27c93f; }

.terminal-title {
    flex: 1;
    text-align: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.terminal-body {
    background: #0d1117;
    padding: 20px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    line-height: 1.6;
    min-height: 400px;
    max-height: 500px;
    overflow-y: auto;
}

.terminal-line { margin-bottom: 4px; white-space: pre-wrap; word-break: break-all; }
.terminal-line.output { color: var(--text-secondary); }
.terminal-line.success { color: var(--accent-green); }
.terminal-line.error { color: var(--accent); }
.terminal-line.info { color: var(--accent-cyan); }
.terminal-line.warning { color: var(--accent-orange); }
.terminal-line.accent { color: var(--accent); font-weight: 600; }

.terminal-input-line {
    display: flex;
    align-items: center;
    gap: 0;
}

.terminal-prompt {
    color: var(--accent-green);
    font-weight: 600;
    white-space: nowrap;
}

.terminal-input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    outline: none;
    caret-color: var(--accent);
}

/* ============ QUIZ ============ */
.quiz-section {
    max-width: 800px;
    margin: 0 auto;
}

.quiz-category {
    margin-bottom: 48px;
}

.quiz-category h3 {
    font-size: 1.4rem;
    margin-bottom: 24px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--border);
}

.quiz-question {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 24px;
    margin-bottom: 16px;
}

.quiz-question h4 {
    font-size: 1rem;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.quiz-question h4 .q-num {
    color: var(--accent);
    margin-right: 8px;
}

.quiz-options { display: flex; flex-direction: column; gap: 8px; }

.quiz-option {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.quiz-option:hover {
    border-color: rgba(255, 52, 52, 0.3);
    background: rgba(255, 52, 52, 0.05);
    color: var(--text-primary);
}

.quiz-option.selected {
    border-color: var(--accent);
    background: rgba(255, 52, 52, 0.1);
    color: var(--text-primary);
}

.quiz-option.correct {
    border-color: var(--accent-green);
    background: rgba(16, 185, 129, 0.1);
    color: var(--accent-green);
}

.quiz-option.incorrect {
    border-color: var(--accent);
    background: rgba(255, 52, 52, 0.1);
    color: var(--accent);
}

.quiz-option input[type="radio"] {
    accent-color: var(--accent);
}

.quiz-explanation {
    display: none;
    margin-top: 12px;
    padding: 12px 16px;
    background: rgba(255, 52, 52, 0.05);
    border-left: 3px solid var(--accent);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.quiz-explanation.show { display: block; }

.quiz-results {
    text-align: center;
    padding: 32px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-top: 24px;
    display: none;
}

.quiz-results.show { display: block; }

.quiz-results h3 {
    font-size: 1.6rem;
    margin-bottom: 8px;
}

.quiz-score {
    font-size: 3rem;
    font-weight: 900;
    color: var(--accent);
}

.btn-check {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: #fff;
    padding: 12px 32px;
    border: none;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 24px;
}

.btn-check:hover { transform: translateY(-2px); box-shadow: 0 4px 20px rgba(255, 52, 52, 0.3); }

/* ============ TABS ============ */
.tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 24px;
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    padding: 4px;
    border: 1px solid var(--border);
    flex-wrap: wrap;
}

.tab-btn {
    padding: 10px 20px;
    border: none;
    background: transparent;
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.9rem;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
    font-family: 'Inter', sans-serif;
}

.tab-btn.active {
    background: rgba(255, 52, 52, 0.15);
    color: var(--accent);
}

.tab-btn:hover:not(.active) {
    color: var(--text-primary);
}

/* ============ FOOTER ============ */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 60px 0 24px;
    margin-top: 60px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.footer-col a {
    display: block;
    color: var(--text-muted);
    margin-bottom: 8px;
    font-size: 0.9rem;
}

.footer-col a:hover { color: var(--accent); }

.footer-col p {
    color: var(--text-muted);
    font-size: 0.85rem;
    line-height: 1.6;
}

.footer-bottom {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ============ MODAL ============ */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.modal-overlay.show { display: flex; }

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    max-width: 700px;
    width: 100%;
    max-height: 80vh;
    overflow-y: auto;
    padding: 32px;
    position: relative;
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
}

.modal-close:hover { color: var(--accent); }

/* ============ INFO BOXES ============ */
.info-box {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 24px;
    margin: 24px 0;
}

.info-box h4 {
    color: var(--accent);
    margin-bottom: 12px;
    font-size: 1.1rem;
}

.info-box p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 8px;
}

.info-box ul {
    padding-left: 20px;
}

.info-box li {
    color: var(--text-secondary);
    margin-bottom: 4px;
    font-size: 0.9rem;
}

.warning-box {
    background: rgba(255, 52, 52, 0.05);
    border: 1px solid rgba(255, 52, 52, 0.2);
}

.warning-box h4 { color: var(--accent); }

.success-box {
    background: rgba(16, 185, 129, 0.05);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.success-box h4 { color: var(--accent-green); }

/* ============ SYNTAX TABLE ============ */
.cmd-table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0;
    font-size: 0.9rem;
}

.cmd-table th {
    background: rgba(255, 52, 52, 0.1);
    color: var(--accent);
    text-align: left;
    padding: 10px 16px;
    font-weight: 600;
    border: 1px solid var(--border);
}

.cmd-table td {
    padding: 10px 16px;
    border: 1px solid var(--border);
    color: var(--text-secondary);
}

.cmd-table tr:hover td {
    background: rgba(255, 52, 52, 0.03);
}

.cmd-table code {
    font-size: 0.85rem;
}

/* ============ SCROLLBAR ============ */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ============ RESPONSIVE ============ */
@media (max-width: 768px) {
    .hero-title { font-size: 2.2rem; }
    .hero-stats { gap: 24px; }
    .stat-number { font-size: 1.6rem; }
    .nav-menu {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-nav);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 16px;
        border-bottom: 1px solid var(--border);
    }
    .nav-menu.active { display: flex; }
    .hamburger { display: flex; }
    .footer-grid { grid-template-columns: 1fr; gap: 24px; }
    .tabs { flex-direction: column; }
}


/* ===== BOUTON RETOUR MENU PRINCIPAL (Horizon 5) ===== */
.nav-back {
    display: inline-flex; align-items: center; justify-content: center;
    width: 38px; height: 38px; margin-right: 10px; flex-shrink: 0;
    border-radius: 10px; background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.14); color: #fff;
    text-decoration: none; font-size: 1.3rem; font-weight: 700; line-height: 1;
    transition: background 0.25s, border-color 0.25s, transform 0.25s;
}
.nav-back:hover {
    background: rgba(255,255,255,0.14); border-color: rgba(255,255,255,0.3); transform: translateX(-2px);
}

/* ===== HARMONISATION VISUELLE HORIZON 5 (audit septembre 2026) ===== */
/* Bloc additif : uniformise sans changer l'accent de la formation. */
/* Boutons : paddings et radius unifies */
.btn { padding: 14px 32px; border-radius: 10px; gap: 8px; text-decoration: none; }
/* Contraste : texte blanc sur degrade rouge (3.63:1), ombre porteuse pour la lisibilite, accent inchange. */
.btn-primary { text-shadow: 0 1px 2px rgba(0, 0, 0, 0.45); }
/* Cartes : radius 12px */
.course-card, .module, .modal, .memo-card, .install-card, .quiz-q, .flash-card, .schema-card, .first-steps-box, .coach-zone { border-radius: 12px; }
/* Transitions unifiees a 0.25s */
.btn, .course-card, .nav-link, .dropdown-content a, .nav-back, .quiz-opt, .q-opt, .qs-chip { transition: all 0.25s ease; }
/* Focus clavier visible */
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }
.nav-back:focus-visible { outline: 2px solid #fff; outline-offset: 3px; }
/* Details et summary : curseur pointeur et espacement */
details summary { cursor: pointer; margin: 4px 0; }
/* Composants communs */
.disclaimer { margin-top: 8px; font-size: 0.85em; color: var(--text-secondary); line-height: 1.6; }
.course-section { margin-top: 24px; }
.course-section h4 { margin-bottom: 10px; font-size: 1.1rem; }
.course-section p { margin-bottom: 12px; font-size: 0.95rem; color: var(--text-secondary); }
.course-section ul { margin: 0 0 12px 20px; }
.course-section ul li { margin-bottom: 6px; font-size: 0.93rem; }
.course-code { font-family: 'JetBrains Mono', monospace; font-size: 0.85em; padding: 2px 6px; border-radius: 4px; }
.course-note { border-radius: 8px; padding: 14px 16px; margin: 14px 0; font-size: 0.9rem; }
/* Tableaux : defilement horizontal sur petit ecran */
.table-responsive { overflow-x: auto; }
/* Responsive minimal : hamburger, grilles en 1 colonne, tableaux scrollables */
@media (max-width: 768px) {
    .course-grid, .install-grid, .memo-grid, .level-grid, .courses-grid, .footer-grid { grid-template-columns: 1fr; }
    table.memo, .cmd-table, .exam-table { display: block; width: 100%; overflow-x: auto; }
    .hero { padding: 100px 16px 60px; }
    .section { padding: 60px 16px; }
    .nav-menu.open, .nav-menu.active { display: flex; }
}