/* =====================================================
   COURS PHP - MAIN STYLESHEET
   Refactored for Design System
   ===================================================== */

@import 'variables.css';

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Outfit', sans-serif;
    background: var(--background);
    color: var(--foreground);
    line-height: 1.7;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

#app-content {
    flex: 1;
    padding: 60px 0;
    width: 100%;
}


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

/* === HEADER === */
header {
    position: sticky;
    top: 0;
    background: color-mix(in srgb, var(--background) 95%, transparent);
    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;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: var(--primary-foreground);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    font-weight: 700;
}

nav {
    display: flex;
    gap: 4px;
}

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

nav a:hover,
nav a.active {
    background: var(--accent);
    color: var(--accent-foreground);
}

/* === HERO === */
.hero {
    padding: 70px 0 50px;
    text-align: center;
    border-bottom: 1px solid var(--border);
    background: radial-gradient(ellipse at top, color-mix(in srgb, var(--primary) 10%, transparent) 0%, transparent 60%);
}

.hero h1 {
    font-size: 2.8rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--foreground), var(--primary), var(--color-accent-base));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 16px;
}

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

/* === 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: var(--radius);
    text-decoration: none;
    color: var(--card-foreground);
    font-size: 0.88rem;
    transition: all 0.2s;
}

.toc-item:hover {
    border-color: var(--primary);
    transform: translateX(4px);
    background: color-mix(in srgb, var(--primary) 10%, transparent);
}

.toc-num {
    width: 26px;
    height: 26px;
    background: var(--primary);
    color: var(--primary-foreground);
    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;
}

/* === 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), var(--primary-light));
    color: var(--primary-foreground);
    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;
}

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

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

h3 {
    font-size: 1.15rem;
    margin: 28px 0 14px;
    color: var(--color-accent-base);
    /* Using specific accent color for titles */
}

p,
li {
    color: var(--muted-foreground);
    margin-bottom: 1rem;
}

ul {
    list-style: none;
    padding-left: 0;
}

li {
    padding-left: 22px;
    position: relative;
    margin-bottom: 0.5rem;
}

li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--primary);
}

/* === CODE BLOCKS === */
.code {
    background: var(--card);
    /* Deep darkness */
    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: var(--secondary);
    border-bottom: 1px solid var(--border);
    font-size: 0.78rem;
    color: var(--muted-foreground);
}

.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: 0.82rem;
    line-height: 1.55;
    overflow-x: auto;
    color: var(--foreground);
}

.kw {
    color: var(--sh-keyword);
}

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

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

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

.c {
    color: var(--sh-comment);
}

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

.prop {
    color: var(--sh-property);
}

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

/* === DEMOS / CARDS === */
.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(--muted-foreground);
    margin-bottom: 14px;
}

.demo-output {
    background: var(--secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 16px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    min-height: 50px;
    color: var(--secondary-foreground);
}

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

/* === REFERENCE CARDS === */
.ref-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 20px;
    color: var(--card-foreground);
    box-shadow: 0 10px 30px color-mix(in srgb, var(--background) 70%, transparent);
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.ref-card:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 16px 40px color-mix(in srgb, var(--background) 60%, transparent);
}

.ref-card h4 {
    margin-bottom: 14px;
    color: var(--foreground);
    font-size: 1rem;
}

.ref-card ul {
    margin: 0;
    padding: 0;
}

.ref-card li {
    color: var(--muted-foreground);
}

.function-item {
    padding: 14px;
    border: 1px dashed color-mix(in srgb, var(--border) 80%, transparent);
    border-radius: 12px;
    background: color-mix(in srgb, var(--secondary) 65%, transparent);
    margin-bottom: 12px;
}

.function-item:last-child {
    margin-bottom: 0;
}

.function-item code {
    color: var(--primary);
    background: color-mix(in srgb, var(--secondary) 75%, transparent);
    padding: 4px 8px;
    border-radius: 6px;
    font-size: 0.85rem;
}

.function-desc {
    color: var(--muted-foreground);
    font-size: 0.92rem;
    margin-top: 8px;
}

.lib-badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.2px;
    margin-left: 8px;
    border: 1px solid transparent;
}

.lib-framework {
    background: color-mix(in srgb, var(--primary) 25%, transparent);
    color: var(--primary);
    border-color: color-mix(in srgb, var(--primary) 45%, transparent);
}

.lib-framework-lib {
    background: color-mix(in srgb, var(--color-accent-base) 18%, transparent);
    color: var(--color-accent-base);
    border-color: color-mix(in srgb, var(--color-accent-base) 40%, transparent);
}

.lib-standalone {
    background: color-mix(in srgb, var(--sh-string) 18%, transparent);
    color: var(--sh-string);
    border-color: color-mix(in srgb, var(--sh-string) 35%, transparent);
}

.lib-service {
    background: color-mix(in srgb, var(--sh-number) 18%, transparent);
    color: var(--sh-number);
    border-color: color-mix(in srgb, var(--sh-number) 35%, transparent);
}

.lib-framework-card {
    border-color: color-mix(in srgb, var(--primary) 55%, transparent);
    box-shadow: 0 12px 30px color-mix(in srgb, var(--primary) 20%, transparent);
}

.lib-framework-lib-card {
    border-color: color-mix(in srgb, var(--color-accent-base) 55%, transparent);
    box-shadow: 0 12px 30px color-mix(in srgb, var(--color-accent-base) 20%, transparent);
}

.lib-standalone-card {
    border-color: color-mix(in srgb, var(--sh-string) 45%, transparent);
}

.lib-service-card {
    border-color: color-mix(in srgb, var(--sh-number) 45%, transparent);
}

.example-toggle {
    background: linear-gradient(135deg, var(--primary), var(--color-accent-base));
    border: 1px solid color-mix(in srgb, var(--primary) 60%, transparent);
    border-radius: 8px;
    padding: 8px 14px;
    color: var(--primary-foreground);
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    margin-top: 12px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
    box-shadow: 0 6px 18px color-mix(in srgb, var(--primary) 35%, transparent);
}

.example-toggle::before {
    content: '▶';
    font-size: 0.7rem;
    transition: transform 0.2s ease;
}

.example-toggle:hover {
    transform: translateY(-1px);
    filter: brightness(1.05);
}

.example-toggle.expanded::before {
    transform: rotate(90deg);
}

.example-content {
    background: var(--secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px;
    margin-top: 12px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.84rem;
    line-height: 1.6;
    color: var(--foreground);
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height 0.25s ease, opacity 0.2s ease;
    border-left: 4px solid var(--color-accent-base);
}

.example-content.is-open {
    opacity: 1;
}

.example-content pre {
    margin: 0;
    padding: 0;
    background: none;
    border: none;
    white-space: pre-wrap;
}

.php-kw { color: var(--sh-keyword); }
.php-fn { color: var(--sh-function); }
.php-str { color: var(--sh-string); }
.php-num { color: var(--sh-number); }
.php-com { color: var(--sh-comment); }
.php-var { color: var(--sh-variable); }
.php-const { color: var(--sh-tag); }

/* === ALERTS === */
.tip {
    background: color-mix(in srgb, var(--sh-string) 10%, transparent);
    border-left: 3px solid var(--sh-string);
    padding: 14px 18px;
    border-radius: 0 10px 10px 0;
    margin: 14px 0;
}

.tip strong {
    color: var(--sh-string);
}

.info {
    background: color-mix(in srgb, var(--primary) 10%, transparent);
    border-left: 3px solid var(--primary);
    padding: 14px 18px;
    border-radius: 0 10px 10px 0;
    margin: 14px 0;
}

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

.warning {
    background: color-mix(in srgb, var(--destructive) 10%, transparent);
    border-left: 3px solid var(--destructive);
    padding: 14px 18px;
    border-radius: 0 10px 10px 0;
    margin: 14px 0;
}

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

/* === TABLES === */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 14px 0;
    font-size: 0.88rem;
}

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

th {
    background: var(--secondary);
    color: var(--primary);
    font-weight: 600;
}

td {
    color: var(--muted-foreground);
}

td code {
    color: var(--primary);
    background: var(--secondary);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.78rem;
}

/* === FOOTER === */
footer {
    padding: 40px 0;
    text-align: center;
    color: var(--muted-foreground);
    font-size: 0.85rem;
    border-top: 1px solid var(--border);
}
/* Navigation Actions */
.nav-actions { display: flex; align-items: center; gap: 10px; }
.btn-back { display: inline-flex; align-items: center; gap: 8px; padding: 8px 16px; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); color: var(--foreground); text-decoration: none; font-size: 0.9rem; font-weight: 500; transition: all 0.2s; }
.btn-back:hover { background: var(--primary); color: var(--primary-foreground); border-color: var(--primary); transform: translateX(-2px); }
.btn-back .icon { font-size: 1.1rem; line-height: 1; }

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

    /* Mobile Menu Button */
    #menu-toggle.mobile-only {
        display: block !important;
        font-size: 1.8rem;
        cursor: pointer;
        z-index: 101;
    }

    /* Mobile Nav Dropdown */
    nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(15, 20, 30, 0.98);
        text-align: center;
        padding: 20px;
        border-bottom: 1px solid var(--border);
        box-shadow: 0 10px 30px rgba(0,0,0,0.5);
        flex-direction: column;
        gap: 15px;
        backdrop-filter: blur(10px);
    }

    nav.open {
        display: flex;
        animation: slideDown 0.3s ease forwards;
    }

    nav a {
        display: block;
        padding: 12px;
        width: 100%;
        font-size: 1.1rem;
        border: 1px solid transparent;
    }

    nav a:hover {
        border-color: var(--primary);
        background: rgba(119, 123, 180, 0.1);
    }

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

    .toc-grid {
        grid-template-columns: 1fr;
    }
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}