/* ==========================================================================
   CODELOOPS DOCS — "Amber Circuit" Theme
   A warm, technical aesthetic for developer documentation
   ========================================================================== */

/* --------------------------------------------------------------------------
   FONTS — Geist & Geist Mono from Vercel
   -------------------------------------------------------------------------- */
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:ital,wght@0,400;0,500;0,600;0,700;1,400&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&display=swap');

/* --------------------------------------------------------------------------
   CSS VARIABLES — Amber Circuit Palette
   -------------------------------------------------------------------------- */
:root {
    /* Core colors */
    --cl-bg-deep: #09090b;
    --cl-bg-surface: #0f0f11;
    --cl-bg-elevated: #18181b;
    --cl-bg-hover: #27272a;
    
    /* Text hierarchy */
    --cl-text-primary: #fafaf9;
    --cl-text-secondary: #a1a1aa;
    --cl-text-muted: #71717a;
    
    /* Accent colors */
    --cl-amber: #f59e0b;
    --cl-amber-dim: #b45309;
    --cl-amber-glow: rgba(245, 158, 11, 0.15);
    --cl-amber-bright: #fbbf24;
    
    --cl-cyan: #06b6d4;
    --cl-cyan-dim: #0891b2;
    
    /* Semantic */
    --cl-border: #27272a;
    --cl-border-subtle: #1f1f23;
    
    /* Gradients */
    --cl-gradient-amber: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    --cl-gradient-surface: linear-gradient(180deg, #18181b 0%, #09090b 100%);
    --cl-gradient-glow: radial-gradient(ellipse at top, rgba(245, 158, 11, 0.08) 0%, transparent 50%);
    
    /* Typography */
    --cl-font-mono: 'JetBrains Mono', ui-monospace, 'Cascadia Code', 'Source Code Pro', Menlo, Consolas, monospace;
    --cl-font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    
    /* Spacing */
    --cl-radius: 8px;
    --cl-radius-lg: 12px;
}

/* --------------------------------------------------------------------------
   THEME OVERRIDES — Coal Theme (default dark)
   -------------------------------------------------------------------------- */
.coal {
    --bg: var(--cl-bg-deep);
    --fg: var(--cl-text-primary);
    
    --sidebar-bg: var(--cl-bg-surface);
    --sidebar-fg: var(--cl-text-secondary);
    --sidebar-non-existant: var(--cl-text-muted);
    --sidebar-active: var(--cl-amber);
    --sidebar-spacer: var(--cl-border);
    
    --scrollbar: var(--cl-text-muted);
    
    --icons: var(--cl-text-muted);
    --icons-hover: var(--cl-amber);
    
    --links: var(--cl-cyan);
    
    --inline-code-color: var(--cl-amber-bright);
    
    --theme-popup-bg: var(--cl-bg-elevated);
    --theme-popup-border: var(--cl-border);
    --theme-hover: var(--cl-bg-hover);
    
    --quote-bg: var(--cl-bg-elevated);
    --quote-border: var(--cl-amber-dim);
    
    --table-border-color: var(--cl-border);
    --table-header-bg: var(--cl-bg-elevated);
    --table-alternate-bg: var(--cl-bg-surface);
    
    --searchbar-border-color: var(--cl-border);
    --searchbar-bg: var(--cl-bg-elevated);
    --searchbar-fg: var(--cl-text-primary);
    --searchbar-shadow-color: transparent;
    --searchresults-header-fg: var(--cl-text-muted);
    --searchresults-border-color: var(--cl-border);
    --searchresults-li-bg: var(--cl-bg-surface);
    --search-mark-bg: var(--cl-amber-dim);
}

/* Also apply to Ayu and Navy for consistency */
.ayu, .navy {
    --bg: var(--cl-bg-deep);
    --fg: var(--cl-text-primary);
    --sidebar-bg: var(--cl-bg-surface);
    --sidebar-fg: var(--cl-text-secondary);
    --sidebar-active: var(--cl-amber);
    --links: var(--cl-cyan);
    --inline-code-color: var(--cl-amber-bright);
}

/* --------------------------------------------------------------------------
   BASE STYLES
   -------------------------------------------------------------------------- */
:root {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--cl-font-sans);
    font-size: 1rem;
    font-weight: 400;
    letter-spacing: -0.01em;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Main content area */
.content main {
    font-size: 1.0625rem; /* 17px - slightly larger for readability */
    line-height: 1.7;
}

/* Subtle ambient glow at top */
.coal #mdbook-page-wrapper::before,
.ayu #mdbook-page-wrapper::before,
.navy #mdbook-page-wrapper::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 400px;
    background: var(--cl-gradient-glow);
    pointer-events: none;
    z-index: -1;
}

/* --------------------------------------------------------------------------
   TYPOGRAPHY
   -------------------------------------------------------------------------- */
.content main h1,
.content main h2,
.content main h3,
.content main h4,
.content main h5,
.content main h6 {
    font-family: var(--cl-font-mono);
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--cl-text-primary);
}

.content main h1 {
    font-size: 2.5rem;
    margin-top: 0;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--cl-border);
    position: relative;
}

/* Amber accent line under h1 */
.coal .content main h1::after,
.ayu .content main h1::after,
.navy .content main h1::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 80px;
    height: 2px;
    background: var(--cl-gradient-amber);
    border-radius: 1px;
}

.content main h2 {
    font-size: 1.75rem;
    margin-top: 2.5rem;
}

.content main h3 {
    font-size: 1.25rem;
    margin-top: 2rem;
}

.content main p {
    font-size: 1.0625rem;
    line-height: 1.75;
    color: var(--cl-text-secondary);
    margin-bottom: 1.25rem;
}

.content main strong {
    color: var(--cl-text-primary);
    font-weight: 600;
}

/* Links with animated underline */
.content main a {
    color: var(--cl-cyan);
    text-decoration: none;
    position: relative;
    transition: color 0.2s ease;
}

.content main a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--cl-cyan);
    transition: width 0.2s ease;
}

.content main a:hover {
    color: var(--cl-cyan);
}

.content main a:hover::after {
    width: 100%;
}

/* --------------------------------------------------------------------------
   SIDEBAR
   -------------------------------------------------------------------------- */
.sidebar {
    font-family: var(--cl-font-sans);
    border-right: 1px solid var(--cl-border-subtle);
}

/* Sidebar header with gradient */
.sidebar .sidebar-scrollbox {
    padding-top: 1rem;
}

.sidebar ol.chapter {
    padding-left: 0;
}

.sidebar ol.chapter li.chapter-item {
    margin: 0;
}

.sidebar ol.chapter li.chapter-item a {
    padding: 0.5rem 1.25rem;
    font-size: 0.9rem;
    font-weight: 450;
    color: var(--cl-text-secondary);
    border-radius: 0;
    display: block;
    transition: all 0.15s ease;
    border-left: 2px solid transparent;
}

.sidebar ol.chapter li.chapter-item a:hover {
    color: var(--cl-text-primary);
    background: var(--cl-amber-glow);
    border-left-color: var(--cl-amber-dim);
}

/* Active sidebar item with glow */
.sidebar ol.chapter li.chapter-item.expanded > a,
.sidebar ol.chapter li.chapter-item a.active {
    color: var(--cl-amber);
    background: var(--cl-amber-glow);
    border-left-color: var(--cl-amber);
    font-weight: 500;
}

/* Section headers */
.sidebar .chapter li.part-title {
    font-family: var(--cl-font-mono);
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--cl-text-muted);
    padding: 1.5rem 1.25rem 0.5rem;
    margin-top: 0.5rem;
}

.sidebar .chapter li.part-title:first-child {
    margin-top: 0;
    padding-top: 0.5rem;
}

/* --------------------------------------------------------------------------
   MENU BAR
   -------------------------------------------------------------------------- */
#mdbook-menu-bar {
    background: var(--cl-bg-surface);
    border-bottom: 1px solid var(--cl-border-subtle);
}

#mdbook-menu-bar .menu-title {
    font-family: var(--cl-font-mono);
    font-weight: 600;
    font-size: 0.95rem;
    letter-spacing: -0.01em;
    color: var(--cl-text-primary);
}

#mdbook-menu-bar .icon-button {
    transition: all 0.15s ease;
    border-radius: var(--cl-radius);
}

#mdbook-menu-bar .icon-button:hover {
    background: var(--cl-amber-glow);
    color: var(--cl-amber);
}

/* --------------------------------------------------------------------------
   CODE BLOCKS — Premium styling
   -------------------------------------------------------------------------- */
.content main pre {
    font-family: var(--cl-font-mono);
    font-size: 0.875rem;
    line-height: 1.6;
    background: var(--cl-bg-surface);
    border: 1px solid var(--cl-border);
    border-radius: var(--cl-radius-lg);
    padding: 1.25rem;
    position: relative;
    overflow-x: auto;
}

/* Gradient top border accent */
.coal .content main pre::before,
.ayu .content main pre::before,
.navy .content main pre::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--cl-amber) 0%, var(--cl-cyan) 100%);
    border-radius: var(--cl-radius-lg) var(--cl-radius-lg) 0 0;
    opacity: 0.7;
}

.content main pre code {
    font-family: inherit;
    background: transparent;
    padding: 0;
    font-size: inherit;
}

/* Inline code */
.content main code {
    font-family: var(--cl-font-mono);
    font-size: 0.875em;
    background: var(--cl-bg-elevated);
    color: var(--cl-amber-bright);
    padding: 0.15em 0.4em;
    border-radius: 4px;
    border: 1px solid var(--cl-border-subtle);
}

/* Copy button styling */
.content main pre .buttons {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    opacity: 0;
    transition: opacity 0.15s ease;
}

.content main pre:hover .buttons {
    opacity: 1;
}

.content main pre .buttons button {
    background: var(--cl-bg-elevated);
    border: 1px solid var(--cl-border);
    border-radius: var(--cl-radius);
    padding: 0.35rem 0.5rem;
    cursor: pointer;
    transition: all 0.15s ease;
}

.content main pre .buttons button:hover {
    background: var(--cl-amber-glow);
    border-color: var(--cl-amber-dim);
}

/* --------------------------------------------------------------------------
   LISTS
   -------------------------------------------------------------------------- */
.content main ul,
.content main ol {
    padding-left: 1.5rem;
}

.content main li {
    font-size: 1.0625rem;
    margin: 0.5rem 0;
    line-height: 1.7;
    color: var(--cl-text-secondary);
}

.content main li::marker {
    color: var(--cl-amber);
}

/* --------------------------------------------------------------------------
   BLOCKQUOTES
   -------------------------------------------------------------------------- */
.content main blockquote {
    border-left: 3px solid var(--cl-amber);
    background: var(--cl-bg-elevated);
    padding: 1rem 1.25rem;
    margin: 1.5rem 0;
    border-radius: 0 var(--cl-radius) var(--cl-radius) 0;
}

.content main blockquote p {
    margin: 0;
    color: var(--cl-text-secondary);
}

/* --------------------------------------------------------------------------
   TABLES
   -------------------------------------------------------------------------- */
.content main table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    font-size: 0.9rem;
}

.content main table th {
    font-family: var(--cl-font-mono);
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--cl-text-muted);
    background: var(--cl-bg-elevated);
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--cl-border);
}

.content main table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--cl-border-subtle);
    color: var(--cl-text-secondary);
}

.content main table tr:hover td {
    background: var(--cl-bg-surface);
}

/* --------------------------------------------------------------------------
   NAVIGATION ARROWS
   -------------------------------------------------------------------------- */
.nav-chapters {
    font-family: var(--cl-font-mono);
    font-weight: 500;
    transition: all 0.2s ease;
}

.nav-chapters:hover {
    color: var(--cl-amber);
}

/* --------------------------------------------------------------------------
   SEARCH
   -------------------------------------------------------------------------- */
#mdbook-searchbar {
    font-family: var(--cl-font-sans);
    border-radius: var(--cl-radius);
    border: 1px solid var(--cl-border);
    background: var(--cl-bg-elevated);
    transition: all 0.15s ease;
}

#mdbook-searchbar:focus {
    border-color: var(--cl-amber-dim);
    box-shadow: 0 0 0 3px var(--cl-amber-glow);
    outline: none;
}

#mdbook-searchresults-outer {
    border-radius: var(--cl-radius-lg);
    border: 1px solid var(--cl-border);
}

#mdbook-searchresults li {
    border-radius: var(--cl-radius);
    margin: 0.25rem;
}

#mdbook-searchresults li:hover {
    background: var(--cl-amber-glow);
}

/* --------------------------------------------------------------------------
   SCROLLBAR — Custom styling
   -------------------------------------------------------------------------- */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

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

::-webkit-scrollbar-thumb:hover {
    background: var(--cl-text-muted);
}

/* Firefox */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--cl-bg-hover) var(--cl-bg-deep);
}

/* --------------------------------------------------------------------------
   THEME POPUP
   -------------------------------------------------------------------------- */
.theme-popup {
    border-radius: var(--cl-radius-lg);
    border: 1px solid var(--cl-border);
    overflow: hidden;
}

.theme-popup button {
    font-family: var(--cl-font-sans);
    padding: 0.5rem 1rem;
    transition: all 0.15s ease;
}

.theme-popup button:hover {
    background: var(--cl-amber-glow);
    color: var(--cl-amber);
}

/* --------------------------------------------------------------------------
   SELECTION
   -------------------------------------------------------------------------- */
::selection {
    background: var(--cl-amber-dim);
    color: var(--cl-text-primary);
}

/* --------------------------------------------------------------------------
   MOBILE RESPONSIVENESS
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
    .content main h1 {
        font-size: 2rem;
    }
    
    .content main h2 {
        font-size: 1.5rem;
    }
    
    .content main pre {
        border-radius: var(--cl-radius);
        padding: 1rem;
        font-size: 0.8rem;
    }
    
    .sidebar ol.chapter li.chapter-item a {
        padding: 0.6rem 1rem;
    }
}

/* --------------------------------------------------------------------------
   PRINT STYLES
   -------------------------------------------------------------------------- */
@media print {
    .coal .content main pre::before,
    .ayu .content main pre::before,
    .navy .content main pre::before {
        display: none;
    }
    
    .coal .content main h1::after,
    .ayu .content main h1::after,
    .navy .content main h1::after {
        display: none;
    }
}

/* --------------------------------------------------------------------------
   SPECIAL ELEMENTS — ASCII Diagram Enhancement
   -------------------------------------------------------------------------- */
.content main pre code:not([class*="language-"]) {
    color: var(--cl-text-muted);
}

/* Make ASCII diagrams more prominent */
.content main pre:has(code:not([class*="language-"])) {
    background: transparent;
    border: 1px dashed var(--cl-border);
}

.coal .content main pre:has(code:not([class*="language-"]))::before,
.ayu .content main pre:has(code:not([class*="language-"]))::before,
.navy .content main pre:has(code:not([class*="language-"]))::before {
    display: none;
}