/* ========================================
   PlayNexus Docs — Documentation Site
   Dark theme with sidebar navigation
   ======================================== */

:root {
    --bg-primary: #06060d;
    --bg-secondary: #0c0c18;
    --bg-sidebar: #080812;
    --bg-card: rgba(15, 15, 30, 0.6);
    --bg-card-hover: rgba(20, 20, 40, 0.8);
    --bg-input: rgba(15, 15, 30, 0.8);
    --text-primary: #f0f0ff;
    --text-secondary: #8888aa;
    --text-muted: #5a5a7a;
    --blue: #00b4ff;
    --violet: #8b5cf6;
    --cyan: #00e5ff;
    --green: #22c55e;
    --yellow: #eab308;
    --orange: #f97316;
    --red: #ef4444;
    --gradient-primary: linear-gradient(135deg, var(--blue), var(--violet));
    --font-heading: 'Sora', sans-serif;
    --font-body: 'Outfit', sans-serif;
    --font-mono: 'Fira Code', 'Consolas', monospace;
    --radius: 12px;
    --radius-sm: 8px;
    --radius-xs: 5px;
    --radius-full: 999px;
    --sidebar-width: 280px;
    --topbar-height: 60px;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    line-height: 1.6;
}

a { color: inherit; text-decoration: none; }

/* ========================================
   Topbar
   ======================================== */

.topbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    height: var(--topbar-height);
    background: rgba(6, 6, 13, 0.85);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255,255,255,0.04);
}

.topbar-inner {
    max-width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 0 24px;
}

.topbar-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.topbar-logo-img {
    height: 32px;
    width: auto;
}

.topbar-label {
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--cyan);
    background: rgba(0, 229, 255, 0.08);
    padding: 3px 10px;
    border-radius: var(--radius-full);
    border: 1px solid rgba(0, 229, 255, 0.15);
}

.topbar-search {
    flex: 1;
    max-width: 480px;
    position: relative;
    display: flex;
    align-items: center;
}

.topbar-search .search-icon {
    position: absolute;
    left: 12px;
    color: var(--text-muted);
    pointer-events: none;
}

.topbar-search input {
    width: 100%;
    padding: 8px 14px 8px 38px;
    background: var(--bg-input);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: var(--radius-full);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.85rem;
    outline: none;
    transition: all 0.2s;
}

.topbar-search input:focus {
    border-color: rgba(0, 229, 255, 0.3);
    background: rgba(15, 15, 30, 0.95);
    box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.06);
}

.topbar-search input::placeholder { color: var(--text-muted); }

.topbar-links {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-shrink: 0;
}

.topbar-link {
    font-size: 0.85rem;
    color: var(--text-secondary);
    transition: color 0.2s;
}

.topbar-link:hover { color: var(--text-primary); }

.sidebar-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 6px;
}

/* ========================================
   Layout
   ======================================== */

.docs-layout {
    display: flex;
    min-height: 100vh;
    padding-top: var(--topbar-height);
}

/* ========================================
   Sidebar
   ======================================== */

.docs-sidebar {
    width: var(--sidebar-width);
    flex-shrink: 0;
    position: sticky;
    top: var(--topbar-height);
    height: calc(100vh - var(--topbar-height));
    overflow-y: auto;
    background: var(--bg-sidebar);
    border-right: 1px solid rgba(255,255,255,0.04);
    padding: 20px 0;
    scrollbar-width: thin;
    scrollbar-color: rgba(255,255,255,0.08) transparent;
}

.docs-sidebar::-webkit-scrollbar { width: 4px; }
.docs-sidebar::-webkit-scrollbar-track { background: transparent; }
.docs-sidebar::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.08); border-radius: 4px; }

.sidebar-nav { padding: 0 12px; }

.sidebar-group { margin-bottom: 20px; }

.sidebar-group-title {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    font-family: var(--font-heading);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
}

.sidebar-group-icon { font-size: 0.75rem; color: var(--cyan); }

.sidebar-links {
    list-style: none;
    padding: 0;
    margin: 4px 0 0;
}

.sidebar-links li { margin: 0; }

.sidebar-link {
    display: block;
    padding: 7px 12px 7px 20px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: all 0.15s;
    border-left: 2px solid transparent;
}

.sidebar-link:hover {
    color: var(--text-primary);
    background: rgba(255,255,255,0.03);
}

.sidebar-link.active {
    color: var(--cyan);
    background: rgba(0, 229, 255, 0.06);
    border-left-color: var(--cyan);
}

.sidebar-empty {
    padding: 24px 16px;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ========================================
   Main Content
   ======================================== */

.docs-main {
    flex: 1;
    min-width: 0;
    max-width: 900px;
    padding: 32px 48px 80px;
}

/* ========================================
   Hero (Homepage)
   ======================================== */

.docs-hero {
    text-align: center;
    padding: 48px 0 40px;
}

.docs-hero h1 {
    font-family: var(--font-heading);
    font-size: 2.4rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 12px;
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.docs-hero-sub {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 520px;
    margin: 0 auto 28px;
    line-height: 1.6;
}

.docs-hero-search {
    position: relative;
    max-width: 500px;
    margin: 0 auto;
    display: flex;
    align-items: center;
}

.docs-hero-search svg {
    position: absolute;
    left: 16px;
    color: var(--text-muted);
    pointer-events: none;
}

.docs-hero-search input {
    width: 100%;
    padding: 14px 20px 14px 48px;
    background: var(--bg-card);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    outline: none;
    transition: all 0.2s;
}

.docs-hero-search input:focus {
    border-color: rgba(0, 229, 255, 0.3);
    box-shadow: 0 0 0 4px rgba(0, 229, 255, 0.06);
}

.docs-hero-search input::placeholder { color: var(--text-muted); }

/* ========================================
   Category Cards (Homepage)
   ======================================== */

.docs-categories {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.docs-category-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
    background: var(--bg-card);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: var(--radius);
    transition: all 0.2s;
}

.docs-category-card:hover {
    background: var(--bg-card-hover);
    border-color: rgba(0, 229, 255, 0.15);
    transform: translateX(4px);
}

.docs-category-icon {
    font-size: 1.4rem;
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 229, 255, 0.06);
    border-radius: var(--radius-sm);
    flex-shrink: 0;
    color: var(--cyan);
}

.docs-category-info { flex: 1; min-width: 0; }

.docs-category-info h3 {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.docs-category-info p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 4px;
}

.docs-category-count {
    font-size: 0.78rem;
    color: var(--text-muted);
}

.docs-category-arrow {
    color: var(--text-muted);
    flex-shrink: 0;
    transition: transform 0.2s;
}

.docs-category-card:hover .docs-category-arrow {
    color: var(--cyan);
    transform: translateX(4px);
}

/* ========================================
   Breadcrumb
   ======================================== */

.docs-breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 24px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.docs-breadcrumb a {
    color: var(--text-secondary);
    transition: color 0.15s;
}

.docs-breadcrumb a:hover { color: var(--cyan); }

.docs-breadcrumb svg { flex-shrink: 0; opacity: 0.4; }

/* ========================================
   Category Header
   ======================================== */

.docs-category-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 28px;
}

.docs-category-header-icon {
    font-size: 1.6rem;
    color: var(--cyan);
}

.docs-category-header h1 {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 700;
}

.docs-category-header-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* ========================================
   Article List
   ======================================== */

.docs-article-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.docs-article-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 18px 20px;
    background: var(--bg-card);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: var(--radius);
    transition: all 0.2s;
}

.docs-article-card:hover {
    background: var(--bg-card-hover);
    border-color: rgba(0, 229, 255, 0.15);
}

.docs-article-card-info { flex: 1; min-width: 0; }

.docs-article-card-info h3 {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.docs-article-card-info p {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.docs-article-card-cat {
    display: inline-block;
    font-size: 0.75rem;
    color: var(--cyan);
    background: rgba(0, 229, 255, 0.06);
    padding: 2px 8px;
    border-radius: var(--radius-full);
    margin-bottom: 4px;
}

.docs-article-card-meta {
    font-size: 0.78rem;
    color: var(--text-muted);
    flex-shrink: 0;
}

.docs-article-card-arrow {
    color: var(--text-muted);
    flex-shrink: 0;
    transition: transform 0.2s;
}

.docs-article-card:hover .docs-article-card-arrow {
    color: var(--cyan);
    transform: translateX(4px);
}

/* ========================================
   Article Content
   ======================================== */

.doc-article { max-width: 100%; }

.doc-article-header {
    margin-bottom: 32px;
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}

.doc-article-header h1 {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 10px;
}

.doc-article-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.meta-sep { opacity: 0.4; }

/* Article body */
.doc-article-content {
    font-size: 0.95rem;
    line-height: 1.8;
    color: var(--text-primary);
}

.doc-article-content h2 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    margin: 2.5rem 0 1rem;
    padding-bottom: 8px;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}

.doc-article-content h3 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 600;
    margin: 2rem 0 0.8rem;
}

.doc-article-content h4 {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 600;
    margin: 1.5rem 0 0.6rem;
}

.doc-article-content p {
    margin-bottom: 1rem;
}

.doc-article-content a {
    color: var(--cyan);
    text-decoration: underline;
    text-underline-offset: 3px;
    transition: opacity 0.15s;
}

.doc-article-content a:hover { opacity: 0.8; }

.doc-article-content strong { font-weight: 600; }

.doc-article-content ul,
.doc-article-content ol {
    padding-left: 1.5rem;
    margin-bottom: 1rem;
}

.doc-article-content li {
    margin-bottom: 0.4rem;
}

.doc-article-content li::marker {
    color: var(--text-muted);
}

.doc-article-content code {
    font-family: var(--font-mono);
    font-size: 0.85em;
    background: rgba(0, 229, 255, 0.08);
    color: var(--cyan);
    padding: 2px 7px;
    border-radius: 4px;
}

.doc-article-content pre {
    background: var(--bg-secondary);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: var(--radius-sm);
    padding: 18px 20px;
    overflow-x: auto;
    margin: 1.2rem 0;
    scrollbar-width: thin;
    scrollbar-color: rgba(255,255,255,0.08) transparent;
}

.doc-article-content pre code {
    background: none;
    color: var(--text-primary);
    padding: 0;
    font-size: 0.85rem;
    line-height: 1.7;
}

.doc-article-content img {
    max-width: 100%;
    border-radius: var(--radius-sm);
    margin: 1rem 0;
    border: 1px solid rgba(255,255,255,0.06);
}

.doc-article-content blockquote {
    border-left: 3px solid var(--cyan);
    padding: 12px 20px;
    margin: 1.2rem 0;
    background: rgba(0, 229, 255, 0.04);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--text-secondary);
}

.doc-article-content blockquote p:last-child { margin-bottom: 0; }

.doc-article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.2rem 0;
    font-size: 0.9rem;
}

.doc-article-content th,
.doc-article-content td {
    padding: 10px 14px;
    text-align: left;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}

.doc-article-content th {
    font-weight: 600;
    font-family: var(--font-heading);
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-muted);
    background: rgba(255,255,255,0.02);
}

.doc-article-content hr {
    border: none;
    border-top: 1px solid rgba(255,255,255,0.06);
    margin: 2rem 0;
}

/* Callout boxes */
.callout {
    padding: 16px 20px;
    border-radius: var(--radius-sm);
    margin: 1.2rem 0;
    border-left: 3px solid;
}

.callout p:last-child { margin-bottom: 0; }

.callout-info {
    background: rgba(0, 180, 255, 0.06);
    border-left-color: var(--blue);
}

.callout-warning {
    background: rgba(234, 179, 8, 0.06);
    border-left-color: var(--yellow);
}

.callout-danger {
    background: rgba(239, 68, 68, 0.06);
    border-left-color: var(--red);
}

.callout-success {
    background: rgba(34, 197, 94, 0.06);
    border-left-color: var(--green);
}

/* ========================================
   Article Navigation (Prev/Next)
   ======================================== */

.doc-article-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 48px;
    padding-top: 32px;
    border-top: 1px solid rgba(255,255,255,0.06);
}

.doc-nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    background: var(--bg-card);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: var(--radius);
    transition: all 0.2s;
}

.doc-nav-link:hover {
    background: var(--bg-card-hover);
    border-color: rgba(0, 229, 255, 0.15);
}

.doc-nav-next { text-align: right; justify-content: flex-end; }

.doc-nav-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 2px;
}

.doc-nav-title {
    display: block;
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}

.doc-nav-link svg {
    color: var(--text-muted);
    flex-shrink: 0;
}

.doc-nav-link:hover svg { color: var(--cyan); }

/* ========================================
   Search
   ======================================== */

.docs-search-header {
    margin-bottom: 28px;
}

.docs-search-header h1 {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.docs-search-count {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

/* ========================================
   Empty State
   ======================================== */

.docs-empty {
    text-align: center;
    padding: 64px 24px;
    color: var(--text-muted);
}

.docs-empty svg {
    margin-bottom: 16px;
    opacity: 0.3;
}

.docs-empty h3 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.docs-empty p {
    font-size: 0.9rem;
    margin-bottom: 20px;
}

/* ========================================
   Buttons
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(0, 180, 255, 0.2);
}

/* ========================================
   Footer
   ======================================== */

.docs-footer {
    border-top: 1px solid rgba(255,255,255,0.04);
    padding: 24px 48px;
    margin-left: var(--sidebar-width);
}

.docs-footer-inner {
    max-width: 900px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.docs-footer-links {
    display: flex;
    gap: 16px;
}

.docs-footer-links a {
    color: var(--text-muted);
    transition: color 0.15s;
}

.docs-footer-links a:hover { color: var(--text-secondary); }

/* ========================================
   Responsive
   ======================================== */

@media (max-width: 1024px) {
    .docs-main { padding: 24px 32px 60px; }
    .doc-article-nav { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .topbar-search { display: none; }
    .topbar-links { display: none; }
    .sidebar-toggle { display: block; margin-left: auto; }

    .docs-sidebar {
        position: fixed;
        top: var(--topbar-height);
        left: 0;
        bottom: 0;
        z-index: 90;
        transform: translateX(-100%);
        transition: transform 0.25s ease;
        box-shadow: none;
    }

    body.sidebar-open .docs-sidebar {
        transform: translateX(0);
        box-shadow: 4px 0 24px rgba(0,0,0,0.5);
    }

    .docs-main {
        padding: 20px 16px 60px;
    }

    .docs-hero h1 { font-size: 1.8rem; }
    .docs-hero-sub { font-size: 0.95rem; }

    .doc-article-header h1 { font-size: 1.5rem; }
    .doc-article-content h2 { font-size: 1.3rem; }
    .doc-article-content h3 { font-size: 1.1rem; }

    .docs-footer {
        margin-left: 0;
        padding: 20px 16px;
    }

    .docs-footer-inner {
        flex-direction: column;
        gap: 8px;
        text-align: center;
    }
}