/* style.css - Professional Monospaced Light/Dark Theme for OBS Backend Tutorial Website */
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@300;400;500;600;700;800&family=Fira+Code:wght@400;500;700&display=swap');

:root {
    /* Primary monospaced typography requested by user */
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    
    /* Default: Light Theme CSS Variables */
    --bg-main: #F8FAFC;
    --bg-card: #FFFFFF;
    --bg-card-hover: #F1F5F9;
    --bg-sidebar: #FFFFFF;
    --border-color: #E2E8F0;
    --border-active: #D97706;
    
    /* Text states */
    --text-primary: #0F172A;
    --text-secondary: #475569;
    --text-muted: #94A3B8;
    
    /* Accents */
    --accent-orange: #D97706;
    --accent-orange-rgb: 217, 119, 6;
    --accent-gold: #B45309;
    --accent-blue: #2563EB;
    --accent-green: #16A34A;
    --accent-red: #DC2626;
    
    /* High contrast dark code theme (consistent across light & dark modes) */
    --code-bg: #0F172A;
    --code-text: #E2E8F0;
    
    --shadow-soft: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-glow: 0 0 15px rgba(217, 119, 6, 0.1);
    
    --sidebar-width: 320px;
    --header-height: 70px;
    --transition-speed: 0.25s;
}

[data-theme="dark"] {
    /* Premium Obsidian Black & Electric Cyan Dark Theme */
    --bg-main: #09090B;
    --bg-card: #18181B;
    --bg-card-hover: #27272A;
    --bg-sidebar: #09090B;
    --border-color: #27272A;
    --border-active: #06B6D4;
    
    /* Text states */
    --text-primary: #FAFAFA;
    --text-secondary: #A1A1AA;
    --text-muted: #52525B;
    
    /* Premium Accents */
    --accent-orange: #06B6D4;
    --accent-orange-rgb: 6, 182, 212;
    --accent-gold: #22D3EE;
    --accent-blue: #3B82F6;
    --accent-green: #10B981;
    --accent-red: #EF4444;
    
    --code-bg: #0C0C0E;
    --code-text: #E4E4E7;
    
    --shadow-soft: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -4px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(6, 182, 212, 0.15);
}

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

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.92rem;
    line-height: 1.65;
    overflow-x: hidden;
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

/* Scrollbars */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: var(--bg-main);
}
::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--accent-orange);
}

/* Header */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    transition: background-color var(--transition-speed), border-color var(--transition-speed);
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    text-decoration: none;
}

.brand-logo {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.brand-logo span {
    color: var(--accent-orange);
}

.brand-badge {
    background: rgba(var(--accent-orange-rgb), 0.1);
    color: var(--accent-orange);
    border: 1px solid rgba(var(--accent-orange-rgb), 0.3);
    padding: 0.2rem 0.5rem;
    font-size: 0.7rem;
    font-weight: 600;
    border-radius: 4px;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

/* Theme Toggle Button */
.theme-toggle-btn {
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 40px;
    height: 40px;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: all 0.2s ease;
}

.theme-toggle-btn:hover {
    border-color: var(--accent-orange);
    background: var(--bg-card-hover);
}

.progress-container {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.progress-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 600;
}

.progress-bar-bg {
    width: 120px;
    height: 6px;
    background: var(--border-color);
    border-radius: 3px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    width: 0%;
    background: var(--accent-orange);
    transition: width 0.4s ease-out;
}

/* App Container */
.app-container {
    display: flex;
    padding-top: var(--header-height);
    min-height: 100vh;
}

/* Sidebar styling */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    position: fixed;
    top: var(--header-height);
    bottom: 0;
    left: 0;
    overflow-y: auto;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    z-index: 90;
    transition: transform var(--transition-speed), background-color var(--transition-speed), border-color var(--transition-speed);
}

.search-box {
    position: relative;
}

.search-input {
    width: 100%;
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.8rem 1rem 0.8rem 2.5rem;
    border-radius: 6px;
    font-family: inherit;
    font-size: 0.8rem;
    transition: all var(--transition-speed);
}

.search-input:focus {
    outline: none;
    border-color: var(--accent-orange);
    box-shadow: var(--shadow-glow);
}

.search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 0.85rem;
    pointer-events: none;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.nav-section-title {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    padding: 0.5rem 0.5rem 0.2rem;
    margin-top: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.7rem 0.8rem;
    border-radius: 4px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.8rem;
    font-weight: 500;
    transition: all 0.2s ease;
    border-left: 2px solid transparent;
}

.nav-item:hover {
    color: var(--text-primary);
    background: var(--bg-card-hover);
}

.nav-item.active {
    color: var(--accent-orange);
    background: rgba(var(--accent-orange-rgb), 0.05);
    border-left-color: var(--accent-orange);
    font-weight: 600;
}

.nav-item-checkbox {
    cursor: pointer;
    width: 14px;
    height: 14px;
    accent-color: var(--accent-orange);
}

/* Main Content Area */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    padding: 3rem 4rem 6rem;
    max-width: 1000px;
    transition: padding var(--transition-speed);
}

/* Sections & Layout */
section {
    display: none;
    animation: fadeIn 0.3s ease-out forwards;
}

section.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Headings */
h1 {
    font-size: 2.2rem;
    font-weight: 800;
    line-height: 1.25;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.subtitle {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    font-weight: 400;
}

h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-top: 3.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

h3 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: var(--accent-orange);
}

p {
    margin-bottom: 1.2rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
}

strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* Info Callout Alerts */
.callout {
    padding: 1.2rem 1.5rem;
    border-radius: 6px;
    margin: 1.5rem 0;
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    font-size: 0.85rem;
    border: 1px solid var(--border-color);
}

.callout-icon {
    font-size: 1.25rem;
    line-height: 1;
}

.callout-content {
    flex: 1;
}

.callout-content strong {
    display: block;
    margin-bottom: 0.3rem;
    font-size: 0.95rem;
}

.callout.tip {
    background: rgba(var(--accent-orange-rgb), 0.04);
    border-left: 3px solid var(--accent-orange);
    color: var(--text-secondary);
}
.callout.tip strong { color: var(--accent-orange); }

.callout.warning {
    background: rgba(220, 38, 38, 0.04);
    border-left: 3px solid var(--accent-red);
    color: var(--text-secondary);
}
.callout.warning strong { color: var(--accent-red); }

.callout.info {
    background: rgba(37, 99, 235, 0.04);
    border-left: 3px solid var(--accent-blue);
    color: var(--text-secondary);
}
.callout.info strong { color: var(--accent-blue); }

.callout.success {
    background: rgba(22, 163, 74, 0.04);
    border-left: 3px solid var(--accent-green);
    color: var(--text-secondary);
}
.callout.success strong { color: var(--accent-green); }

/* Code Blocks Styling */
pre[class*="language-"] {
    background: var(--code-bg) !important;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    margin: 1.2rem 0;
    position: relative;
    padding: 1.2rem 1.5rem !important;
    overflow-x: auto;
}

code[class*="language-"] {
    font-family: var(--font-mono) !important;
    font-size: 0.8rem;
    text-shadow: none !important;
    color: var(--code-text) !important;
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-bottom: none;
    border-top-left-radius: 6px;
    border-top-right-radius: 6px;
    padding: 0.5rem 1.2rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.code-header + pre[class*="language-"] {
    margin-top: 0;
    border-top-left-radius: 0;
    border-top-right-radius: 0;
}

.btn-copy {
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-copy:hover {
    background: var(--accent-orange);
    color: #fff;
    border-color: var(--accent-orange);
}

/* Inline Code Elements */
code:not([class*="language-"]) {
    background: var(--bg-card-hover);
    border: 1px solid var(--border-color);
    color: var(--accent-orange);
    padding: 0.1rem 0.3rem;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
}

/* Tabs Container */
.tabs-container {
    margin: 1.5rem 0;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    overflow: hidden;
    background: var(--bg-card);
}

.tabs-header {
    display: flex;
    background: var(--bg-main);
    border-bottom: 1px solid var(--border-color);
    overflow-x: auto;
}

.tab-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.8rem 1.2rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    border-bottom: 2px solid transparent;
    white-space: nowrap;
}

.tab-btn:hover {
    color: var(--text-primary);
    background: var(--bg-card-hover);
}

.tab-btn.active {
    color: var(--accent-orange);
    border-bottom-color: var(--accent-orange);
}

.tab-content {
    display: none;
    padding: 1rem;
    background: var(--code-bg);
}

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

.tab-content pre[class*="language-"] {
    margin: 0;
    border: none;
    background: transparent !important;
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    font-size: 0.8rem;
}

th, td {
    padding: 0.7rem 0.9rem;
    border: 1px solid var(--border-color);
    text-align: left;
    color: var(--text-primary);
}

th {
    background: var(--bg-card-hover);
    color: var(--text-primary);
    font-weight: 700;
}

th strong {
    color: inherit;
}

tr:nth-child(even) {
    background: var(--bg-card-hover);
}

tr:nth-child(odd) {
    background: var(--bg-card);
}

/* Loyalty Tier Upgrader widget */
.widget-box {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.75rem;
    margin: 2rem 0;
    box-shadow: var(--shadow-soft);
}

.widget-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.widget-desc {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.simulator-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

@media(max-width: 768px) {
    .simulator-layout {
        grid-template-columns: 1fr;
    }
}

.simulator-controls {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.control-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    display: flex;
    justify-content: space-between;
}

.control-value {
    color: var(--accent-orange);
    font-weight: bold;
}

.sim-input-range {
    width: 100%;
    accent-color: var(--accent-orange);
    cursor: pointer;
}

.sim-input-number {
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.5rem 0.75rem;
    border-radius: 4px;
    font-family: inherit;
    font-size: 0.8rem;
}

.sim-input-number:focus {
    outline: none;
    border-color: var(--accent-orange);
}

.simulator-results {
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 1.2rem;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    justify-content: center;
}

.result-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px dashed var(--border-color);
    padding-bottom: 0.5rem;
}

.result-row:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.result-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.result-val {
    font-weight: 600;
    font-size: 0.8rem;
}

.result-val.tier-badge {
    background: var(--accent-orange);
    color: #fff;
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
}

/* Quiz block styling */
.quiz-container {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 1.5rem;
    margin: 2rem 0;
}

.quiz-question {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.quiz-options {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.quiz-option {
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    padding: 0.7rem 0.9rem;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.quiz-option:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
}

.quiz-option.correct {
    background: rgba(22, 163, 74, 0.1) !important;
    border-color: var(--accent-green) !important;
    color: var(--accent-green) !important;
    font-weight: 600;
}

.quiz-option.incorrect {
    background: rgba(220, 38, 38, 0.1) !important;
    border-color: var(--accent-red) !important;
    color: var(--accent-red) !important;
}

.quiz-explanation {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.75rem;
    color: var(--accent-orange);
    display: none;
    animation: fadeIn 0.3s ease;
}

/* Architecture diagrams */
.flow-diagram {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    margin: 2rem 0;
    padding: 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    align-items: center;
}

.flow-step-box {
    width: 100%;
    max-width: 450px;
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 0.8rem 1.2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    cursor: pointer;
    transition: all 0.2s;
}

.flow-step-box:hover, .flow-step-box.active {
    border-color: var(--accent-orange);
    background: var(--bg-card-hover);
}

.flow-step-num {
    background: var(--accent-orange);
    color: #fff;
    width: 24px;
    height: 24px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 0.75rem;
    flex-shrink: 0;
}

.flow-step-text h4 {
    font-size: 0.85rem;
    color: var(--text-primary);
    margin-bottom: 0.1rem;
}

.flow-step-text p {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 0;
}

.flow-arrow {
    color: var(--text-muted);
    font-size: 1rem;
    line-height: 1;
}

.flow-details-panel {
    width: 100%;
    max-width: 450px;
    background: rgba(var(--accent-orange-rgb), 0.03);
    border: 1px solid rgba(var(--accent-orange-rgb), 0.2);
    border-radius: 4px;
    padding: 0.8rem 1rem;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
    display: none;
    animation: fadeIn 0.3s ease;
}

/* Footer */
footer {
    border-top: 1px solid var(--border-color);
    padding: 2.5rem 0;
    text-align: center;
    margin-top: 5rem;
}

.footer-logo {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.4rem;
}

.footer-logo span {
    color: var(--accent-orange);
}

.footer-text {
    font-size: 0.7rem;
    color: var(--text-muted);
}

/* Navigation lists inside markdown */
ul, ol {
    margin-left: 1.5rem;
    margin-bottom: 1.2rem;
    color: var(--text-secondary);
}

li {
    margin-bottom: 0.4rem;
    font-size: 0.85rem;
}

/* Print Overrides */
@media print {
    body {
        background: #fff !important;
        color: #000 !important;
        font-family: monospace;
    }
    .sidebar, header, .bottom-nav-actions, footer {
        display: none !important;
    }
    .main-content {
        margin-left: 0 !important;
        padding: 0 !important;
    }
    section {
        display: block !important;
        page-break-after: always;
    }
}

/* Responsive adjustments */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
        padding: 2rem;
    }
    
    .mobile-menu-btn {
        display: block !important;
    }
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.2rem;
    cursor: pointer;
}

/* Document Switcher tabs */
.doc-switcher {
    display: flex;
    gap: 1.5rem;
    margin-left: 3rem;
    margin-right: auto;
}

.doc-switch-tab {
    text-decoration: none;
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--text-secondary);
    padding: 0.2rem 0;
    font-family: var(--font-mono);
    transition: color var(--transition-speed);
    border-bottom: 2px solid transparent;
}

.doc-switch-tab:hover {
    color: var(--text-primary);
}

.doc-switch-tab.active {
    color: var(--accent-orange);
    border-bottom-color: var(--accent-orange);
}

@media (max-width: 768px) {
    .doc-switcher {
        display: none; /* Hide document tabs on tiny mobile screens to avoid overlap */
    }
}