:root {
    --bg-color: #030712;
    --surface-color: #111827;
    --surface-light: #1f2937;
    --border-color: rgba(255, 255, 255, 0.1);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-primary: #3b82f6;
    --accent-secondary: #8b5cf6;
    --accent-gradient: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    --glass-bg: rgba(17, 24, 39, 0.7);
    --glass-border: rgba(255, 255, 255, 0.08);
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;800&family=JetBrains+Mono:wght@400;700&display=swap');

body {
    margin: 0;
    padding: 0;
    font-family: 'Inter', -apple-system, sans-serif;
    color: var(--text-primary);
    background-color: var(--bg-color);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: 800;
    letter-spacing: -0.025em;
    margin: 0;
}

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

a:hover {
    color: var(--accent-primary);
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 32px;
}

/* Header */
header {
    background-color: var(--glass-bg);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

header nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header .logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: #ffffff;
    display: flex;
    align-items: center;
    gap: 8px;
}

header .logo::before {
    content: '>';
    color: var(--accent-primary);
    font-family: 'JetBrains Mono', monospace;
}

header .nav-links {
    display: flex;
    gap: 32px;
}

header .nav-links a {
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.95rem;
}

header .nav-links a:hover {
    color: #ffffff;
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 100px 0;
}

.hero h1 {
    font-size: 5rem;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 24px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.05em;
}

.hero p.tagline {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 48px;
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.8;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition-smooth);
    border: none;
}

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

.btn-primary:hover {
    background-color: var(--accent-primary);
    transform: translateY(-1px);
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.btn-outline:hover {
    border-color: #ffffff;
    background-color: rgba(255, 255, 255, 0.05);
}

.action-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
}

/* Grid & Cards */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    margin: 64px 0;
}

.card {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 32px;
    transition: var(--transition-smooth);
}

.card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
}

.card h3 {
    margin-bottom: 12px;
    font-size: 1.25rem;
}

/* Compiler Interface (IDE style) */
.compiler-container {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    margin-top: 40px;
    display: flex;
    flex-direction: column;
    height: 600px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}

.compiler-header {
    background-color: var(--surface-light);
    padding: 12px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.compiler-body {
    display: flex;
    flex: 1;
    overflow: hidden;
}

.editor-pane {
    flex: 1;
    display: flex;
    background-color: #0d1117;
    position: relative;
    border-right: 1px solid var(--border-color);
}

.line-numbers {
    width: 50px;
    padding: 16px 0;
    text-align: center;
    color: #4b5563;
    font-family: 'JetBrains Mono', monospace;
    font-size: 14px;
    user-select: none;
    border-right: 1px solid rgba(255, 255, 255, 0.05);
    background-color: #0d1117;
}

.editor-wrapper {
    flex: 1;
    position: relative;
}

#code-input {
    width: 100%;
    height: 100%;
    background: transparent;
    border: none;
    color: #e6edf3;
    font-family: 'JetBrains Mono', monospace;
    font-size: 14px;
    padding: 16px;
    resize: none;
    outline: none;
    line-height: 1.5;
    tab-size: 4;
}

.output-pane {
    width: 350px;
    background-color: var(--terminal-bg);
    display: flex;
    flex-direction: column;
}

.output-header {
    background-color: #1a1a1a;
    padding: 8px 16px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

#output-display {
    flex: 1;
    padding: 16px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    color: #10b981;
    overflow-y: auto;
    white-space: pre-wrap;
}

.run-btn {
    background-color: #10b981;
    color: #ffffff;
    border: none;
    padding: 8px 20px;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.run-btn:hover {
    background-color: #059669;
}

.run-btn.loading {
    opacity: 0.7;
    pointer-events: none;
}

/* Footer */
footer {
    padding: 80px 0;
    border-top: 1px solid var(--border-color);
    text-align: center;
    margin-top: 100px;
}

/* Responsive */
@media (max-width: 900px) {
    .compiler-body { flex-direction: column; }
    .output-pane { width: 100%; height: 200px; border-top: 1px solid var(--border-color); }
    .hero h1 { font-size: 3rem; }
}

/* Documentation Layout */
.docs-layout {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 40px;
    padding-top: 40px;
    align-items: start;
}

.docs-sidebar {
    position: sticky;
    top: 100px;
    height: calc(100vh - 140px);
    overflow-y: auto;
    padding-right: 20px;
    border-right: 1px solid var(--border-color);
}

.docs-sidebar::-webkit-scrollbar {
    width: 4px;
}

.docs-sidebar::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 10px;
}

.sidebar-group {
    margin-bottom: 24px;
}

.sidebar-group h4 {
    color: var(--text-secondary);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    margin-bottom: 12px;
}

.sidebar-link {
    display: block;
    padding: 8px 12px;
    color: var(--text-primary);
    font-size: 0.9rem;
    border-radius: 6px;
    margin-bottom: 4px;
    transition: var(--transition-smooth);
}

.sidebar-link:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--accent-primary);
}

.sidebar-link.active {
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent-primary);
    font-weight: 600;
}

.docs-content {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 48px;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

.markdown-body h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.markdown-body h2 {
    font-size: 1.75rem;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    color: var(--accent-primary);
}

.markdown-body p {
    margin-bottom: 1.25rem;
    color: #e2e8f0;
    line-height: 1.8;
}

.markdown-body code {
    font-family: 'JetBrains Mono', monospace;
    background: rgba(255, 255, 255, 0.1);
    padding: 0.2em 0.4em;
    border-radius: 4px;
    font-size: 0.85em;
}

.markdown-body pre {
    background: #0d1117 !important;
    padding: 24px !important;
    border-radius: 12px !important;
    border: 1px solid var(--border-color) !important;
    margin: 1.5rem 0 !important;
    position: relative;
}

/* Prism Overrides */
code[class*="language-"],
pre[class*="language-"] {
    font-family: 'JetBrains Mono', monospace !important;
    font-size: 0.9rem !important;
}

.docs-nav-footer {
    display: flex;
    justify-content: space-between;
    margin-top: 60px;
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
}

.nav-btn {
    display: flex;
    flex-direction: column;
    gap: 4px;
    max-width: 45%;
}

.nav-btn span {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.nav-btn a {
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--accent-primary);
}

.docs-graph-container {
    background: var(--surface-color);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    overflow: hidden;
    margin-bottom: 40px;
}

@media (max-width: 1000px) {
    .docs-layout {
        grid-template-columns: 1fr;
    }
    .docs-sidebar {
        display: none;
    }
}