:root {
    --bg-primary: #fafafa;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    --accent-primary: #1d4ed8;
    --accent-secondary: #2563eb;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-tertiary: #94a3b8;
    --border-color: rgba(0, 0, 0, 0.08);
    --glass-bg: rgba(255, 255, 255, 0.84);
    --glass-border: rgba(0, 0, 0, 0.1);
    --navbar-bg: rgba(250, 250, 250, 0.84);
}

[data-theme="dark"] {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a25;
    --accent-primary: #3b82f6;
    --accent-secondary: #60a5fa;
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --text-tertiary: #71717a;
    --border-color: rgba(255, 255, 255, 0.08);
    --glass-bg: rgba(255, 255, 255, 0.04);
    --glass-border: rgba(255, 255, 255, 0.1);
    --navbar-bg: rgba(10, 10, 15, 0.84);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text-primary);
    background:
        radial-gradient(circle at top right, rgba(37, 99, 235, 0.12), transparent 30%),
        radial-gradient(circle at bottom left, rgba(59, 130, 246, 0.08), transparent 28%),
        var(--bg-primary);
    line-height: 1.7;
}

a {
    color: inherit;
}

.page-shell {
    min-height: 100vh;
}

.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(20px);
    background: var(--navbar-bg);
    border-bottom: 1px solid var(--border-color);
}

.navbar-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
}

.logo-icon {
    height: 42px;
    width: auto;
}

.logo-light {
    display: none;
}

[data-theme="dark"] .logo-light {
    display: block;
}

[data-theme="dark"] .logo-dark {
    display: none;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
}

.nav-link:hover {
    color: var(--accent-primary);
}

.theme-toggle {
    border: 1px solid var(--glass-border);
    background: var(--glass-bg);
    color: var(--text-primary);
    width: 40px;
    height: 40px;
    border-radius: 999px;
    cursor: pointer;
    font-size: 1rem;
}

.hero {
    max-width: 1200px;
    margin: 0 auto;
    padding: 5rem 1.5rem 2.5rem;
}

.hero-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 3rem;
    backdrop-filter: blur(16px);
    box-shadow: 0 20px 70px rgba(15, 23, 42, 0.08);
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.45rem 0.9rem;
    border-radius: 999px;
    background: rgba(37, 99, 235, 0.1);
    color: var(--accent-primary);
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.hero h1 {
    margin: 1.25rem 0 1rem;
    font-size: clamp(2.4rem, 5vw, 4rem);
    line-height: 1.1;
    letter-spacing: -0.03em;
}

.hero p {
    max-width: 760px;
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin: 0;
}

.meta-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
    margin-top: 2rem;
}

.meta-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 18px;
    padding: 1.25rem;
}

.meta-label {
    color: var(--text-tertiary);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 0.35rem;
}

.meta-value {
    color: var(--text-primary);
    font-weight: 700;
}

.content-wrap {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem 5rem;
}

.content-layout {
    display: grid;
    grid-template-columns: minmax(0, 250px) minmax(0, 1fr);
    gap: 2rem;
    align-items: start;
}

.toc {
    position: sticky;
    top: 92px;
    padding: 1.5rem;
    border-radius: 20px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(16px);
}

.toc h2 {
    margin: 0 0 1rem;
    font-size: 0.95rem;
}

.toc ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

.toc li + li {
    margin-top: 0.75rem;
}

.toc a {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

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

.policy-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 2rem;
    backdrop-filter: blur(16px);
}

.policy-section + .policy-section {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.policy-section h2 {
    margin: 0 0 0.85rem;
    font-size: 1.5rem;
    line-height: 1.3;
}

.policy-section p {
    margin: 0.75rem 0 0;
    color: var(--text-secondary);
}

.policy-section ul {
    margin: 1rem 0 0;
    padding-left: 1.2rem;
    color: var(--text-secondary);
}

.policy-section li + li {
    margin-top: 0.55rem;
}

.contact-card {
    margin-top: 1.5rem;
    padding: 1.25rem;
    border-radius: 18px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
}

.contact-card p {
    margin: 0.3rem 0;
}

.footer {
    border-top: 1px solid var(--border-color);
    padding: 2rem 1.5rem 3rem;
}

.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    color: var(--text-tertiary);
    font-size: 0.95rem;
}

.footer-links {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.footer-links a {
    text-decoration: none;
}

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

@media (max-width: 900px) {
    .content-layout {
        grid-template-columns: 1fr;
    }

    .toc {
        position: static;
    }

    .meta-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .navbar-inner,
    .hero,
    .content-wrap,
    .footer {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    .hero-card,
    .policy-card {
        padding: 1.5rem;
        border-radius: 20px;
    }

    .footer-inner {
        flex-direction: column;
        text-align: center;
    }
}