/* DeepCatch docs site — minimal, dark-mode-aware, GitHub-flavored */

:root {
    --bg: #ffffff;
    --bg-alt: #f6f8fa;
    --fg: #1f2328;
    --fg-muted: #57606a;
    --border: #d0d7de;
    --accent: #218bff;
    --accent-hover: #0969da;
    --sponsor: #db61a2;
    --code-bg: #f6f8fa;
    --code-fg: #1f2328;
    --shadow: 0 1px 3px rgba(0,0,0,0.04);
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0d1117;
        --bg-alt: #161b22;
        --fg: #e6edf3;
        --fg-muted: #8b949e;
        --border: #30363d;
        --accent: #58a6ff;
        --accent-hover: #79c0ff;
        --sponsor: #db61a2;
        --code-bg: #161b22;
        --code-fg: #e6edf3;
        --shadow: 0 1px 3px rgba(0,0,0,0.4);
    }
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--fg);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Helvetica, Arial, sans-serif;
    line-height: 1.6;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); text-decoration: underline; }

/* Nav */
nav {
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 10;
    backdrop-filter: blur(8px);
}

.nav-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-weight: 700;
    font-size: 18px;
    color: var(--fg);
}

.nav-links {
    display: flex;
    gap: 24px;
    align-items: center;
}

.nav-links a { color: var(--fg-muted); font-size: 14px; }
.nav-links a:hover { color: var(--fg); text-decoration: none; }

.sponsor-btn {
    background: var(--sponsor);
    color: white !important;
    padding: 6px 14px;
    border-radius: 6px;
    font-weight: 600;
}

.sponsor-btn:hover { opacity: 0.85; text-decoration: none; }

/* Hero */
header {
    background: linear-gradient(180deg, var(--bg) 0%, var(--bg-alt) 100%);
    border-bottom: 1px solid var(--border);
}

.hero {
    max-width: 1100px;
    margin: 0 auto;
    padding: 80px 24px 60px;
    text-align: center;
}

.badge {
    display: inline-block;
    background: var(--bg-alt);
    border: 1px solid var(--border);
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    color: var(--fg-muted);
    margin-bottom: 24px;
}

.hero h1 {
    font-size: 48px;
    line-height: 1.15;
    margin: 0 0 16px;
    letter-spacing: -0.02em;
}

.hero-sub {
    font-size: 20px;
    color: var(--fg-muted);
    margin: 0 0 32px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 48px;
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.15s ease;
    border: 1px solid transparent;
}

.btn-primary {
    background: var(--accent);
    color: white !important;
}

.btn-primary:hover { background: var(--accent-hover); text-decoration: none; }

.btn-secondary {
    background: transparent;
    border-color: var(--border);
    color: var(--fg) !important;
}

.btn-secondary:hover { border-color: var(--fg-muted); text-decoration: none; }

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 40px;
    padding-top: 40px;
    border-top: 1px solid var(--border);
}

.stat-value {
    display: block;
    font-size: 36px;
    font-weight: 700;
    color: var(--accent);
    line-height: 1.1;
}

.stat-label {
    display: block;
    font-size: 13px;
    color: var(--fg-muted);
    margin-top: 4px;
}

/* Sections */
section { padding: 80px 0; }
section.alt-bg { background: var(--bg-alt); }

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

section h2 {
    font-size: 32px;
    margin: 0 0 16px;
    letter-spacing: -0.01em;
}

section > .container > p { color: var(--fg-muted); font-size: 17px; max-width: 720px; }

/* Cards grid */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 32px;
}

.card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 24px;
    box-shadow: var(--shadow);
}

.card h3 { margin: 0 0 8px; font-size: 18px; }
.card p { margin: 0 0 12px; color: var(--fg-muted); font-size: 14px; }
.card pre { margin: 12px 0 0; }

/* Code blocks */
pre {
    background: var(--code-bg);
    color: var(--code-fg);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 16px;
    overflow-x: auto;
    font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Monaco, Consolas, monospace;
    font-size: 13px;
    line-height: 1.5;
}

code {
    font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Monaco, Consolas, monospace;
    background: var(--code-bg);
    padding: 2px 6px;
    border-radius: 3px;
    font-size: 13px;
}

pre code { background: transparent; padding: 0; }

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
}

th, td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th {
    background: var(--bg-alt);
    font-weight: 600;
    font-size: 14px;
}

tbody tr:last-child td { border-bottom: 0; }

/* Footer */
footer {
    border-top: 1px solid var(--border);
    padding: 32px 0;
    text-align: center;
    color: var(--fg-muted);
    font-size: 14px;
}

footer p { margin: 4px 0; }

/* Responsive */
@media (max-width: 720px) {
    .nav-inner { flex-direction: column; gap: 12px; }
    .nav-links { flex-wrap: wrap; justify-content: center; gap: 16px; }
    .hero h1 { font-size: 32px; }
    .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 16px; }
    section { padding: 48px 0; }
    section h2 { font-size: 24px; }
}