@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
    color-scheme: light;
    --bg: #f6f7fb;
    --surface: #ffffff;
    --surface-muted: #f1f1fb;
    --surface-contrast: #eef1ff;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-tertiary: #64748b;
    --border: rgba(99, 102, 241, 0.08);
    --border-strong: rgba(148, 163, 184, 0.35);
    --accent: #6366f1;
    --accent-strong: #4f46e5;
    --accent-soft: rgba(99, 102, 241, 0.10);
    --success: #22c55e;
    --warning: #f59e0b;
    --radius-lg: 18px;
    --radius-md: 12px;
    --radius-sm: 8px;
    --shadow: 0 24px 48px rgba(15, 23, 42, 0.08);
    --shadow-soft: 0 12px 30px rgba(79, 70, 229, 0.10);
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

[data-theme="dark"] {
    color-scheme: dark;
    --bg: #0b1120;
    --surface: #111827;
    --surface-muted: rgba(148, 163, 184, 0.05);
    --surface-contrast: rgba(148, 163, 184, 0.09);
    --text-primary: #e2e8f0;
    --text-secondary: #cbd5f5;
    --text-tertiary: #94a3b8;
    --border: rgba(99, 102, 241, 0.25);
    --border-strong: rgba(148, 163, 184, 0.35);
    --accent: #818cf8;
    --accent-strong: #6366f1;
    --accent-soft: rgba(129, 140, 248, 0.18);
    --success: #34d399;
    --warning: #facc15;
    --shadow: 0 18px 36px rgba(15, 23, 42, 0.55);
    --shadow-soft: 0 18px 40px rgba(99, 102, 241, 0.35);
}

* {
    box-sizing: border-box;
}

html, body {
    height: 100%;
}

body {
    margin: 0;
    font-family: var(--font-family);
    background: radial-gradient(circle at top, rgba(99, 102, 241, 0.16), transparent 45%),
                radial-gradient(circle at 20% 80%, rgba(56, 189, 248, 0.12), transparent 40%),
                var(--bg);
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

a {
    color: inherit;
    text-decoration: none;
}

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

.site-wrapper {
    min-height: 100%;
    display: flex;
    flex-direction: column;
}

.content-wrapper {
    width: min(960px, 92vw);
    margin: 0 auto;
    flex: 1;
    padding: 48px 0 72px;
}

.site-header {
    position: sticky;
    top: 0;
    backdrop-filter: blur(12px);
    background: linear-gradient(180deg, rgba(246, 247, 251, 0.85) 0%, rgba(246, 247, 251, 0.35) 100%);
    border-bottom: 1px solid var(--border);
    z-index: 50;
}

[data-theme="dark"] .site-header {
    background: linear-gradient(180deg, rgba(11, 17, 32, 0.90) 0%, rgba(11, 17, 32, 0.35) 100%);
}

.header-inner {
    width: min(960px, 92vw);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 0;
    gap: 16px;
}

.brand {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.brand-name {
    font-weight: 600;
    font-size: 1.15rem;
    letter-spacing: -0.02em;
}

.brand-subtitle {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.2em;
}

.nav-links {
    display: flex;
    gap: 18px;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.nav-links a {
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    transition: background 0.2s ease, color 0.2s ease;
}

.nav-links a.active,
.nav-links a:focus-visible,
.nav-links a:hover {
    background: var(--accent-soft);
    color: var(--accent-strong);
}

.theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    border: 1px solid var(--border-strong);
    background: var(--surface);
    color: var(--text-secondary);
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.theme-toggle:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-soft);
    color: var(--accent-strong);
    border-color: var(--accent);
}

.hero {
    margin-top: 48px;
    padding: 48px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.14), rgba(14, 165, 233, 0.12));
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}

[data-theme="dark"] .hero {
    background: linear-gradient(135deg, rgba(129, 140, 248, 0.18), rgba(14, 165, 233, 0.14));
}

.hero h1 {
    font-size: clamp(2.1rem, 2.5vw, 2.7rem);
    margin: 0 0 18px;
    letter-spacing: -0.04em;
}

.hero p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 640px;
}

.grid {
    display: grid;
    gap: 24px;
    margin-top: 36px;
}

@media (min-width: 900px) {
    .grid.two-columns {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

.card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 32px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.card h2 {
    margin: 0;
    font-size: 1.45rem;
}

.card p {
    margin: 0;
    color: var(--text-secondary);
    line-height: 1.6;
}

.card ul {
    margin: 0;
    padding-left: 20px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.section-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    background: var(--accent-soft);
    color: var(--accent-strong);
    padding: 6px 12px;
    border-radius: 999px;
}

.muted {
    color: var(--text-tertiary);
    font-size: 0.95rem;
    line-height: 1.6;
}

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

.list-grid {
    display: grid;
    gap: 12px;
}

.list-item {
    padding: 14px 16px;
    border-radius: var(--radius-md);
    background: var(--surface-muted);
    border: 1px solid var(--border);
    color: var(--text-secondary);
}

.highlight {
    color: var(--accent-strong);
    font-weight: 600;
}

.cta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 8px;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 22px;
    border-radius: 999px;
    font-weight: 600;
    font-size: 0.95rem;
    border: none;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.button-primary {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-strong) 100%);
    color: #fff;
    box-shadow: var(--shadow-soft);
}

.button-secondary {
    background: var(--surface);
    color: var(--text-primary);
    border: 1px solid var(--border-strong);
}

.button:hover {
    transform: translateY(-2px);
}

.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    padding: 0;
    margin: 0;
}

.tag-list li {
    list-style: none;
    padding: 8px 14px;
    border-radius: 999px;
    background: var(--surface-muted);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
}

.table th, .table td {
    border-bottom: 1px solid var(--border-strong);
    text-align: left;
    padding: 12px 0;
    color: var(--text-secondary);
}

.table th {
    color: var(--text-primary);
    font-weight: 600;
}

.success-state {
    display: grid;
    justify-items: center;
    gap: 18px;
    text-align: center;
}

.success-icon {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(34, 197, 94, 0.16), rgba(99, 102, 241, 0.12));
    display: grid;
    place-items: center;
    font-size: 36px;
    color: var(--success);
}

.footer {
    margin-top: 48px;
    padding: 32px 0 48px;
    border-top: 1px solid var(--border);
    color: var(--text-tertiary);
    font-size: 0.85rem;
}

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

footer .links {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 12px;
}

@media (max-width: 720px) {
    .hero {
        padding: 32px;
    }
    .card {
        padding: 24px;
    }
    .header-inner {
        flex-direction: column;
        align-items: flex-start;
    }
    .nav-links {
        flex-wrap: wrap;
    }
}