:root{--bg:#0b0c10;--fg:#e5ecf4;--muted:#93a1b1;--accent:#5bbad5;--card:#111217;--border:#2b303b}
.theme-light{--bg:#ffffff;--fg:#111217;--muted:#5c6675;--accent:#0b6efb;--card:#f7f8fa;--border:#e5e8ee}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--fg);font:16px/1.6 -apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Inter,Arial,sans-serif}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:1100px;margin:0 auto;padding:0 16px}
.site-header,.site-footer{border-bottom:1px solid var(--border);background:var(--card)}
.site-footer{border-top:1px solid var(--border);border-bottom:none;margin-top:32px;padding:12px 0;color:var(--muted)}
.site-header .container,.site-footer .container{display:flex;align-items:center;justify-content:space-between;padding:12px 0}
.brand{font-weight:700;color:var(--fg)}
.nav a{margin-left:16px;color:var(--muted)}
.btn-ghost{margin-left:12px;background:transparent;border:1px solid var(--border);color:var(--muted);padding:6px 10px;border-radius:6px;cursor:pointer}
.btn-ghost:hover{border-color:var(--accent);color:var(--fg)}
.layout{display:grid;grid-template-columns:260px 1fr;gap:24px;margin-top:20px}
.sidebar{position:sticky;top:12px;align-self:start;background:var(--card);border:1px solid var(--border);padding:12px;border-radius:8px;max-height:80vh;overflow:auto}
.sidebar h3{margin:8px 0 6px;font-size:14px;color:var(--muted)}
.sidebar .cat{margin:8px 0 4px}
.sidebar ul{list-style:none;margin:0 0 10px;padding:0}
.sidebar li{margin:4px 0}
.content{background:var(--card);border:1px solid var(--border);padding:20px;border-radius:8px}
.content h1,h2,h3{scroll-margin-top:80px}
.md-content pre{background:#0f1115;border:1px solid var(--border);padding:12px;border-radius:6px;overflow:auto}
.md-content code{background:#11141a;padding:2px 4px;border-radius:4px}
.muted{color:var(--muted)}
.small{font-size:12px;color:var(--muted)}
.back-to-top{margin-top:20px}

/* Index (card view) */
.index-hero h1{margin:0 0 6px}
.index-hero .muted{margin:0 0 12px}
.search-wrap{margin:12px 0 6px}
.search-input{width:100%;max-width:420px;background:var(--bg);border:1px solid var(--border);color:var(--fg);padding:10px 12px;border-radius:8px;outline:none}
.search-input::placeholder{color:var(--muted)}
.search-input:focus{border-color:var(--accent)}

.tool-section{margin-top:18px}
.section-header{display:flex;align-items:center;gap:10px;margin:10px 0 12px}
.section-icon{display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:8px;border:1px solid var(--border);background:var(--bg);color:var(--muted);font-size:12px;font-weight:700;letter-spacing:.3px}
.section-title{margin:0;font-size:16px}

.card-grid{display:grid;grid-template-columns:repeat(3, minmax(0, 1fr));gap:14px}
.tool-card{display:flex;flex-direction:column;justify-content:space-between;min-height:110px;background:var(--card);border:1px solid var(--border);border-radius:10px;padding:14px;color:var(--fg);text-decoration:none}
.tool-card:hover{border-color:var(--accent);text-decoration:none}
.tool-card-title{margin:0 0 6px;font-size:14px}
.tool-card-summary{margin:0;color:var(--muted);font-size:13px;line-height:1.45}
.badges{margin-top:10px;display:flex;gap:8px;flex-wrap:wrap}
.badge{display:inline-flex;align-items:center;border:1px solid var(--border);background:var(--bg);color:var(--muted);font-size:11px;padding:3px 8px;border-radius:999px}

@media (max-width: 1000px){.card-grid{grid-template-columns:repeat(2, minmax(0, 1fr))}}
@media (max-width: 600px){.card-grid{grid-template-columns:1fr}.search-input{max-width:100%}}
@media (max-width: 900px){.layout{grid-template-columns:1fr}.sidebar{display:none}}