/* =====================================================
   COURS NODE.JS - STYLESHEET
   Créé par Antigravity - 2025
   ===================================================== */

:root {
    --primary: #68a063;
    /* Node Green */
    --primary-bright: #83cd29;
    /* Brighter Node Green */
    --secondary: #303030;
    /* Node Dark BG */
    --accent: #ffffff;
    --bg: #222222;
    /* Darkest BG */
    --bg2: #2b2b2b;
    /* Panel BG */
    --card: #303030;
    --text: #f0f0f0;
    --muted: #a0a0a0;
    --border: #444444;

    /* Syntax Highlighting */
    --kw: #c792ea;
    /* Purple */
    --fn: #82aaff;
    /* Blue */
    --str: #c3e88d;
    /* Green */
    --num: #f78c6c;
    /* Orange */
    --c: #546e7a;
    /* Comment Grey */
    --var: #ffcb6b;
    /* Yellow */
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Outfit', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

/* === HEADER === */
header {
    position: sticky;
    top: 0;
    background: rgba(34, 34, 34, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    z-index: 100;
    padding: 16px 0;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary-bright);
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: transparent;
    color: var(--primary-bright);
    border: 2px solid var(--primary-bright);
    border-radius: 6px;
    /* Hexagon-ish or rounded square for Node */
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 700;
}

/* === NAVIGATION REFACTORED === */
.mobile-menu-btn {
    display: none;
    background: transparent;
    border: none;
    cursor: pointer;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 32px;
    height: 32px;
    z-index: 200;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--text);
    transition: all 0.3s ease;
}

/* Menu Ouvert (Animation Burger) */
.mobile-menu-btn.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

nav.nav-menu {
    display: flex;
    gap: 4px;
}

nav.nav-menu a {
    color: var(--muted);
    text-decoration: none;
    padding: 8px 14px;
    border-radius: 8px;
    font-size: 0.85rem;
    transition: all 0.2s;
}

nav.nav-menu a:hover,
nav.nav-menu a.active {
    background: var(--bg2);
    color: var(--primary-bright);
}

nav.nav-menu .quiz-btn {
    border: 1px solid var(--primary);
    color: var(--primary-bright);
}

nav.nav-menu .quiz-btn:hover {
    background: var(--primary);
    color: #fff;
}

/* === RESPONSIVE MENU === */
@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }

    nav.nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 250px;
        height: 100vh;
        background: rgba(30, 30, 30, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        padding: 80px 20px 20px;
        transition: right 0.3s ease;
        border-left: 1px solid var(--border);
        box-shadow: -5px 0 15px rgba(0, 0, 0, 0.5);
    }

    nav.nav-menu.active {
        right: 0;
    }

    nav.nav-menu a {
        font-size: 1.1rem;
        padding: 12px;
        border-bottom: 1px solid var(--border);
        border-radius: 0;
    }
}

/* === HERO === */
.hero {
    padding: 70px 0 50px;
    text-align: center;
    border-bottom: 1px solid var(--border);
    background: radial-gradient(circle at center, rgba(104, 160, 99, 0.1) 0%, transparent 60%);
}

.hero h1 {
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--primary-bright);
    margin-bottom: 16px;
    text-shadow: 0 0 20px rgba(104, 160, 99, 0.3);
}

.hero p {
    color: var(--muted);
    max-width: 600px;
    margin: 0 auto;
    font-size: 1.05rem;
}

/* === INTRO BOX === */
.intro-box {
    background: var(--card);
    border-bottom: 1px solid var(--border);
    padding: 30px 0;
}

.intro-box h3 {
    margin-top: 0;
    color: var(--primary-bright);
}

/* === TOC === */
.toc {
    padding: 35px 0;
    border-bottom: 1px solid var(--border);
}

.toc-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 10px;
}

.toc-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 8px;
    text-decoration: none;
    color: var(--text);
    font-size: 0.88rem;
    transition: all 0.2s;
}

.toc-item:hover {
    border-color: var(--primary);
    transform: translateX(4px);
    background: rgba(104, 160, 99, 0.1);
}

.toc-num {
    width: 26px;
    height: 26px;
    background: rgba(104, 160, 99, 0.15);
    color: var(--primary-bright);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.7rem;
    font-weight: 600;
    flex-shrink: 0;
    border: 1px solid rgba(104, 160, 99, 0.3);
}

/* === SECTIONS === */
section {
    padding: 55px 0;
    border-bottom: 1px solid var(--border);
}

.sec-header {
    display: flex;
    align-items: flex-start;
    gap: 18px;
    margin-bottom: 30px;
}

.sec-num {
    width: 52px;
    height: 52px;
    background: linear-gradient(135deg, var(--primary), #3e6e39);
    color: #fff;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.2rem;
    font-weight: 600;
    flex-shrink: 0;
    box-shadow: 0 4px 15px rgba(104, 160, 99, 0.2);
}

.sec-title {
    font-size: 1.7rem;
    font-weight: 600;
    margin-bottom: 5px;
    color: var(--primary-bright);
}

.sec-sub {
    color: var(--muted);
    font-size: 0.95rem;
}

/* === DETAILS / SUMMARY === */
details {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: 8px;
    margin: 14px 0;
    overflow: hidden;
}

summary {
    padding: 12px 16px;
    cursor: pointer;
    font-weight: 600;
    color: var(--primary-bright);
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: background 0.2s;
}

summary::-webkit-details-marker {
    display: none;
}

summary:hover {
    background: rgba(131, 205, 41, 0.05);
}

summary::after {
    content: '+';
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--muted);
    transition: transform 0.2s;
}

details[open] summary::after {
    transform: rotate(45deg);
}

details[open] summary {
    border-bottom: 1px solid var(--border);
    background: rgba(131, 205, 41, 0.05);
}

.details-content {
    padding: 16px;
    color: var(--muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* === CODE BLOCKS === */
.code {
    background: #1e1e1e;
    /* VS Code dark */
    border: 1px solid var(--border);
    border-radius: 10px;
    margin: 14px 0;
    overflow: hidden;
}

.code-head {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background: #252526;
    border-bottom: 1px solid var(--border);
    font-size: 0.78rem;
    color: var(--muted);
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.dot.r {
    background: #ff5f56;
}

.dot.y {
    background: #ffbd2e;
}

.dot.g {
    background: #27ca40;
}

pre {
    padding: 16px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    line-height: 1.55;
    overflow-x: auto;
    color: #abb2bf;
}

/* Syntax Highlighting */
.kw {
    color: var(--kw);
}

.fn {
    color: var(--fn);
}

.str {
    color: var(--str);
}

.num {
    color: var(--num);
}

.c {
    color: var(--c);
    font-style: italic;
}

.var {
    color: var(--var);
}

/* === DEMOS === */
.demo {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 22px;
    margin: 14px 0;
}

.demo-title {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    color: var(--dim);
    margin-bottom: 14px;
}

.demo-output {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 16px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    min-height: 50px;
    margin-top: 12px;
    color: var(--str);
    /* Terminal green-ish */
}

.demo-btn {
    padding: 10px 20px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    margin-right: 8px;
}

.demo-btn:hover {
    filter: brightness(1.1);
    transform: translateY(-2px);
}

/* === UTILS === */
.grid2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
}

.tip,
.info,
.warning {
    padding: 14px 18px;
    border-radius: 0 10px 10px 0;
    margin: 14px 0;
    font-size: 0.95rem;
}

.tip {
    background: rgba(104, 160, 99, 0.1);
    border-left: 3px solid var(--primary);
}

.tip strong {
    color: var(--primary-bright);
}

.warning {
    background: rgba(247, 140, 108, 0.1);
    border-left: 3px solid var(--num);
}

.warning strong {
    color: var(--num);
}

/* === FOOTER === */
footer {
    padding: 40px 0;
    text-align: center;
    color: var(--dim);
    font-size: 0.85rem;
    border-top: 1px solid var(--border);
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }

    .sec-header {
        flex-direction: column;
    }
}

/* === SCROLLBAR === */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg);
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}