/* ============================================
   SLASH-ROOT MODERN CSS FRAMEWORK
   Version 2.0
   ============================================ */

:root {
    /* Dark theme colors (default) */
    --primary-bg: #0d1117;
    --secondary-bg: #161b22;
    --tertiary-bg: #21262d;
    --hover-bg: #30363d;
    --border-color: #30363d;
    
    --primary-text: #c9d1d9;
    --secondary-text: #8b949e;
    --heading-text: #f0f6fc;
    
    --primary-color: #00d4ff;
    --accent-color: #ff6b35;
    --accent-primary: #00d4ff;
    --accent-secondary: #ff6b35;
    --accent-hover: #00e5ff;
    
    --success: #238636;
    --warning: #d29922;
    --danger: #da3633;
    
    --code-bg: #161b22;
    --shadow: rgba(1, 4, 9, 0.5);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border radius */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Light theme */
[data-theme="light"] {
    --primary-bg: #ffffff;
    --secondary-bg: #f6f8fa;
    --tertiary-bg: #eaeef2;
    --hover-bg: #dde4ea;
    --border-color: #d0d7de;
    
    --primary-text: #24292f;
    --secondary-text: #57606a;
    --heading-text: #1f2328;
    
    --primary-color: #0969da;
    --accent-color: #d73a49;
    --accent-primary: #0969da;
    --accent-secondary: #d73a49;
    --accent-hover: #0550ae;
    
    --success: #1a7f37;
    --warning: #bf8700;
    --danger: #cf222e;
    
    --code-bg: #f6f8fa;
    --shadow: rgba(31, 35, 40, 0.15);
}

/* ============================================
   BASE STYLES
   ============================================ */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: var(--primary-text);
    background-color: var(--primary-bg);
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1, h2, h3, h4, h5, h6 {
    color: var(--heading-text);
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.1rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--spacing-md);
    color: var(--primary-text);
}

a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

code {
    background-color: var(--code-bg);
    color: var(--accent-primary);
    padding: 0.2em 0.4em;
    border-radius: var(--radius-sm);
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.9em;
}

pre {
    background-color: var(--code-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    overflow-x: auto;
    margin-bottom: var(--spacing-md);
}

pre code {
    background: none;
    padding: 0;
    font-size: 0.875rem;
}

/* ============================================
   HEADER & NAVIGATION
   ============================================ */

.site-header {
    background: linear-gradient(135deg, var(--secondary-bg) 0%, var(--tertiary-bg) 100%);
    border-bottom: 2px solid var(--primary-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 20px var(--shadow);
}

header {
    background: linear-gradient(135deg, var(--secondary-bg) 0%, var(--tertiary-bg) 100%);
    border-bottom: 2px solid var(--primary-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 20px var(--shadow);
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-header .container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 80px;
    flex-wrap: wrap;
    gap: 1rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.logo i {
    font-size: 3.5rem;
    color: var(--accent-primary);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.logo span {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo h1 {
    font-size: 2.5rem;
    margin: 0;
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.main-nav {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.main-nav a {
    color: var(--primary-text);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    transition: all 0.2s;
    text-decoration: none;
}

.main-nav a:hover {
    background-color: var(--hover-bg);
    color: var(--accent-primary);
    text-decoration: none;
}

nav ul {
    list-style: none;
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
}

nav ul li a {
    color: var(--primary-text);
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    text-decoration: none;
}

nav ul li a:hover {
    background-color: var(--hover-bg);
    color: var(--accent-primary);
    text-decoration: none;
}

/* Theme toggle button */
.theme-toggle {
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    color: var(--primary-text);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 1.2rem;
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    background: var(--hover-bg);
    transform: scale(1.05);
}

/* ============================================
   MAIN CONTENT LAYOUT
   ============================================ */

main {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-2xl) var(--spacing-xl);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
    text-align: center;
    padding: var(--spacing-2xl) 0;
    background: linear-gradient(135deg, var(--secondary-bg) 0%, var(--tertiary-bg) 100%);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-2xl);
    border: 1px solid var(--border-color);
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.hero p {
    font-size: 1.2rem;
    color: var(--secondary-text);
    max-width: 800px;
    margin: 0 auto var(--spacing-lg);
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
    margin-top: var(--spacing-xl);
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent-primary);
    display: block;
}

.stat-label {
    color: var(--secondary-text);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ============================================
   SEARCH BAR
   ============================================ */

.search-container {
    margin-bottom: var(--spacing-2xl);
}

.search-wrapper {
    position: relative;
    max-width: 600px;
    margin: 0 auto;
}

.search-input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-md) var(--spacing-md) 3rem;
    background-color: var(--secondary-bg);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    color: var(--primary-text);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.search-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.1);
}

.search-icon {
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--secondary-text);
    font-size: 1.2rem;
}

/* ============================================
   CATEGORY FILTERS
   ============================================ */

.filter-container {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-xl);
    justify-content: center;
}

.filter-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--primary-text);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.9rem;
    font-weight: 500;
}

.filter-btn:hover {
    background-color: var(--hover-bg);
    border-color: var(--accent-primary);
}

.filter-btn.active {
    background-color: var(--accent-primary);
    color: #ffffff;
    border-color: var(--accent-primary);
}

/* ============================================
   CARDS & ARTICLES
   ============================================ */

.guides-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.card {
    background-color: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-normal);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px var(--shadow);
    border-color: var(--accent-primary);
}

.card:hover::before {
    transform: scaleX(1);
}

.card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.card-icon {
    font-size: 2rem;
    color: var(--accent-primary);
}

.card h3 {
    margin: 0;
    font-size: 1.3rem;
}

.card-meta {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    font-size: 0.85rem;
    color: var(--secondary-text);
}

.card-tag {
    background-color: var(--tertiary-bg);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.card-links {
    list-style: none;
}

.card-links li {
    margin-bottom: var(--spacing-sm);
}

.card-links li a {
    color: var(--primary-text);
    display: flex;
    align-items: center;
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.card-links li a::before {
    content: '→';
    margin-right: var(--spacing-sm);
    color: var(--accent-primary);
    font-weight: bold;
}

.card-links li a:hover {
    background-color: var(--tertiary-bg);
    padding-left: var(--spacing-md);
    text-decoration: none;
}

.guide-count {
    display: inline-block;
    background-color: var(--accent-primary);
    color: #ffffff;
    padding: 0.2em 0.6em;
    border-radius: var(--radius-lg);
    font-size: 0.75rem;
    font-weight: 600;
    margin-left: var(--spacing-sm);
}

/* ============================================
   TABLE OF CONTENTS (for guide pages)
   ============================================ */

.toc {
    background-color: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    position: sticky;
    top: 100px;
}

.toc h2 {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-md);
    color: var(--accent-primary);
}

.toc ul {
    list-style: none;
}

.toc li {
    margin-bottom: var(--spacing-sm);
}

.toc li a {
    color: var(--primary-text);
    display: block;
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.toc li a:hover {
    background-color: var(--tertiary-bg);
    color: var(--accent-primary);
    padding-left: var(--spacing-md);
    text-decoration: none;
}

/* ============================================
   COPY BUTTON for code blocks
   ============================================ */

.code-wrapper {
    position: relative;
}

.copy-btn {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background-color: var(--tertiary-bg);
    border: 1px solid var(--border-color);
    color: var(--primary-text);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.85rem;
    transition: all var(--transition-fast);
    opacity: 0;
}

.code-wrapper:hover .copy-btn {
    opacity: 1;
}

.copy-btn:hover {
    background-color: var(--accent-primary);
    color: #ffffff;
}

.copy-btn.copied {
    background-color: var(--success);
    color: #ffffff;
}

/* ============================================
   FOOTER
   ============================================ */

footer {
    background-color: var(--secondary-bg);
    border-top: 1px solid var(--border-color);
    margin-top: var(--spacing-2xl);
    padding: var(--spacing-2xl) var(--spacing-xl);
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
}

.footer-section h3 {
    margin-bottom: var(--spacing-md);
    color: var(--accent-primary);
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: var(--spacing-sm);
}

.footer-bottom {
    max-width: 1400px;
    margin: var(--spacing-xl) auto 0;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--secondary-text);
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.text-center { text-align: center; }
.text-muted { color: var(--secondary-text); }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-md); }
.mb-2 { margin-bottom: var(--spacing-xl); }
.mt-1 { margin-top: var(--spacing-md); }
.mt-2 { margin-top: var(--spacing-xl); }

.badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.badge-success { background-color: var(--success); color: #fff; }
.badge-warning { background-color: var(--warning); color: #fff; }
.badge-info { background-color: var(--accent-primary); color: #fff; }

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 1200px) {
    .guides-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    }
}

@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .guides-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    main {
        padding: var(--spacing-lg) var(--spacing-md);
    }
}

@media (max-width: 480px) {
    h1 { font-size: 1.8rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.2rem; }
    
    .logo h1 {
        font-size: 1.5rem;
    }
    
    .logo i {
        font-size: 2rem;
    }
}

/* ============================================
   ANIMATIONS
   ============================================ */

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.5s ease-out;
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
    header, footer, .search-container, .filter-container, .theme-toggle {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .card {
        break-inside: avoid;
        border: 1px solid #ccc;
    }
}

/* ============================================
   GUIDE PAGE OVERRIDES (spacing, breadcrumbs, back-to-top, footer)
   ============================================ */

/* Breadcrumbs (used on guide pages) */
.breadcrumbs {
    background: var(--secondary-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 0.5rem 0;
}

.breadcrumbs .container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.breadcrumbs a {
    color: var(--accent-primary);
    text-decoration: none;
}

.breadcrumbs a:hover {
    text-decoration: underline;
}

.breadcrumbs span {
    color: var(--secondary-text);
}

/* Reduce top gap on guide pages */
.guide-container {
    margin: 1rem auto !important; /* was 2rem on some inline styles */
}

main.guide-content {
    /* reduce default main padding for guide pages only */
    padding-top: var(--spacing-lg) !important;
    padding-bottom: var(--spacing-xl) !important;
}

/* First heading should not be pushed down */
.guide-content h2:first-child {
    margin-top: 0 !important;
}

/* Back to Top button (ensure proper positioning/visibility) */
.back-to-top {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    width: 48px;
    height: 48px;
    background: var(--accent-primary);
    color: #ffffff;
    border: none;
    border-radius: 50%;
    display: none; /* shown when scrolled */
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    box-shadow: 0 4px 12px var(--shadow);
    z-index: 9999;
}

.back-to-top.visible { display: flex; }

.back-to-top:hover {
    background: var(--accent-hover);
}

/* Footer - compact design with logo and email only */
.site-footer {
    background-color: var(--secondary-bg);
    border-top: 1px solid var(--border-color);
    margin-top: var(--spacing-2xl);
    padding: 1rem 0;
}

.site-footer .container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

/* Remove excessive spacing between lines in old markup */
.site-footer .container p { margin: 0; }

/* Hide the old tagline completely if present */
.site-footer .container p:nth-child(2) { display: none; }

/* Optional: styles for new injected markup */
.footer-compact { display: flex; align-items: center; gap: 1rem; }
.footer-brand { display: inline-flex; align-items: center; gap: 0.5rem; font-weight: 600; color: var(--heading-text); }
.footer-brand i { color: var(--accent-primary); }
.footer-contact a { color: var(--primary-text); text-decoration: none; }
.footer-contact a:hover { color: var(--accent-primary); text-decoration: underline; }