/* CSS Variables */
:root {
    --bg-primary: #0a0c10;
    --bg-secondary: #161b22;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --accent-blue: #58a6ff;
    --accent-green: #3fb950;
    --border-color: #30363d;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, "Liberation Mono", Menlo, Courier, monospace;
}

/* Reset & Base */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-primary);
    background-image: radial-gradient(circle at 50% 0%, #13171f 0%, #0a0c10 40%);
    background-attachment: fixed;
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

.highlight {
    color: var(--accent-blue);
}

/* Header */
.site-header {
    padding: 24px 0;
    border-bottom: 1px solid transparent;
    /* kept transparent for minimal look, can add color if needed */
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

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

.logo-text {
    font-weight: 600;
    font-size: 1.1rem;
    letter-spacing: -0.02em;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 24px;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.main-nav a {
    color: var(--text-secondary);
}

.main-nav a:hover {
    color: var(--text-primary);
}

.nav-separator {
    color: var(--border-color);
}

.github-link {
    font-family: var(--font-mono);
}

/* Hero */
.hero {
    padding: 120px 0 100px;
}

.hero-title {
    font-size: 4rem;
    line-height: 1.1;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 24px;
    max-width: 900px;
    background: linear-gradient(180deg, #ffffff 0%, #a5b4fc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    font-weight: 400;
    margin-bottom: 48px;
}

.hero-desc {
    max-width: 650px;
    font-size: 1.1rem;
    color: var(--text-secondary);
}

/* Sections */
section {
    padding: 80px 0;
}

.section-header {
    margin-bottom: 48px;
}

.section-header h2 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.section-lead {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Grids */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 40px;
}

/* Cards */
.card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 32px;
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.card:hover {
    border-color: var(--text-secondary);
    transform: translateY(-4px);
    box-shadow: 0 12px 30px -10px rgba(0, 0, 0, 0.4);
}

.philosophy-card h3 {
    font-size: 1.25rem;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.philosophy-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Product Cards */
.product-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 240px;
}

.card-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 24px;
}

.product-card h3 {
    font-size: 1.5rem;
    font-family: var(--font-mono);
}

.product-desc {
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.badge {
    font-size: 0.75rem;
    padding: 4px 8px;
    border-radius: 4px;
    font-family: var(--font-mono);
    text-transform: uppercase;
    font-weight: 500;
}

.badge-open-source {
    background: rgba(63, 185, 80, 0.15);
    color: var(--accent-green);
    border: 1px solid rgba(63, 185, 80, 0.3);
}

.badge-v1 {
    background: rgba(88, 166, 255, 0.15);
    color: var(--accent-blue);
    border: 1px solid rgba(88, 166, 255, 0.3);
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    border: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-primary);
    transition: all 0.2s cubic-bezier(0.3, 0, 0.5, 1);
}

.btn:hover {
    transform: translateY(-1px);
}

.btn-primary:hover {
    border-color: var(--accent-blue);
    background: rgba(88, 166, 255, 0.1);
    color: #58a6ff;
    box-shadow: 0 0 15px rgba(88, 166, 255, 0.2);
}

.btn-secondary:hover {
    border-color: var(--accent-green);
    background: rgba(63, 185, 80, 0.1);
    color: #3fb950;
    box-shadow: 0 0 15px rgba(63, 185, 80, 0.2);
}

.btn-tertiary:hover {
    border-color: var(--text-primary);
    background: rgba(255, 255, 255, 0.1);
}

/* List Styles */
.styled-list {
    list-style: none;
    padding: 0;
}

.styled-list li {
    margin-bottom: 12px;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.styled-list strong {
    color: var(--text-primary);
}

/* Footer */
.site-footer {
    padding: 60px 0;
    border-top: 1px solid var(--border-color);
    margin-top: 80px;
}

.footer-grid {
    display: flex;
    justify-content: space-between;
    margin-bottom: 40px;
}

.footer-logo {
    font-weight: 600;
    margin-bottom: 8px;
    display: block;
}

.copyright {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.footer-col a {
    display: inline-block;
    margin-left: 24px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-col a:first-child {
    margin-left: 0;
}

.footer-legal {
    font-size: 0.8rem;
    color: var(--text-secondary);
    border-top: 1px solid #21262d;
    /* slightly lighter than border-color */
    padding-top: 24px;
}

.footer-legal a {
    color: var(--text-secondary);
}

.separator {
    margin: 0 8px;
    opacity: 0.5;
}

/* Link Text Arrow */
.link-text {
    font-weight: 500;
    font-size: 0.95rem;
    display: inline-flex;
    align-items: center;
}

/* Additions for Refined Content */
.product-tag {
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: -0.01em;
}

.badge-beta {
    background: rgba(139, 148, 158, 0.15);
    color: var(--text-secondary);
    border: 1px solid rgba(139, 148, 158, 0.3);
}

.btn-tertiary {
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.btn-tertiary:hover {
    color: var(--text-primary);
    border-color: var(--text-secondary);
}

/* Responsive */
/* Quick Start Section */
.quickstart {
    background: linear-gradient(180deg, var(--bg-secondary) 0%, rgba(22, 27, 34, 0) 100%);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

/* Subtle glow behind quickstart */
.quickstart::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(88, 166, 255, 0.05) 0%, rgba(0, 0, 0, 0) 70%);
    pointer-events: none;
    z-index: 0;
}

.quickstart-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.quickstart h2 {
    font-size: 2rem;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.quickstart-desc {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.code-block-wrapper {
    position: relative;
    box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.5);
}

.code-block {
    background: #0d1117;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid var(--border-color);
}

.code-lang {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
}

.copy-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 4px 12px;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.copy-btn:hover {
    border-color: var(--text-primary);
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.code-block pre {
    margin: 0;
    padding: 24px;
    overflow-x: auto;
}

.code-block code {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--text-primary);
}

.code-block .comment {
    color: #8b949e;
    font-style: italic;
}

/* Quick Start Tabs */
.quickstart-tabs {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 32px;
    position: relative;
    z-index: 2;
}

.tab-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: 20px;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.tab-btn:hover {
    border-color: var(--text-primary);
    color: var(--text-primary);
}

.tab-btn.active {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--accent-blue);
    color: var(--text-primary);
    box-shadow: 0 0 10px rgba(88, 166, 255, 0.1);
}

.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

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

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Section Darker */
.section-darker {
    background: rgba(0, 0, 0, 0.2);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    padding: 60px 24px;
    border-radius: 8px;
    margin-top: 40px;
}

/* Comment */
/* Metrics Section */
.metrics {
    background: var(--bg-primary);
    padding-top: 100px;
    padding-bottom: 100px;
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 32px;
}

.metric-card {
    text-align: center;
    padding: 32px 24px;
    background: rgba(22, 27, 34, 0.5);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.metric-card:hover {
    transform: translateY(-4px);
    border-color: rgba(88, 166, 255, 0.5);
    background: var(--bg-secondary);
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
}

.metric-value {
    font-size: 3rem;
    font-weight: 700;
    color: var(--accent-blue);
    font-family: var(--font-mono);
    margin-bottom: 8px;
    line-height: 1;
    letter-spacing: -0.03em;
}

.metric-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.metric-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }

    .header-inner {
        flex-direction: column;
        gap: 16px;
    }

    .footer-grid {
        flex-direction: column;
        gap: 24px;
        text-align: center;
    }

    .footer-col a {
        margin: 0 12px;
    }

    .quickstart-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .metrics-grid {
        grid-template-columns: 1fr;
        /* Stack on mobile */
    }

    gap: 24px;
}
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: rgba(22, 27, 34, 0.9);
    border: 1px solid var(--accent-green);
    color: var(--text-primary);
    padding: 12px 24px;
    border-radius: 8px;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    gap: 12px;
    z-index: 1000;
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    pointer-events: none;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.toast-icon {
    color: var(--accent-green);
}