/* hub.itop4u.com — Shared Styles */
:root{--bg:#f8fafc;--text:#0f172a;--muted:#475569;--card:#fff;--orange:#f97316;--orange-2:#fb923c;--border:#e2e8f0;--green:#16a34a;--blue:#2563eb}
*{box-sizing:border-box}html,body{height:100%}body{margin:0;background:var(--bg);color:var(--text);font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Inter,Arial,sans-serif;line-height:1.6}
a{color:inherit;text-decoration:none}
.container{max-width:1120px;margin:0 auto;padding:0 20px}

/* Header */
.header{position:sticky;top:0;background:rgba(255,255,255,.92);backdrop-filter:saturate(180%) blur(8px);border-bottom:1px solid var(--border);z-index:50}
.row{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 0}
.brand{display:flex;align-items:center;gap:10px;font-weight:800}
.nav{display:none;gap:20px;font-size:14px}@media(min-width:768px){.nav{display:flex}}
.nav a:hover{color:var(--orange)}

/* Buttons */
.btn{display:inline-block;border-radius:12px;padding:10px 14px;font-weight:700;font-size:14px;transition:.15s transform,.2s box-shadow,.2s background;cursor:pointer;border:none}
.btn-dark{background:#0f172a;color:#fff}.btn-dark:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(0,0,0,.15)}
.btn-ghost{border:1px solid #cbd5e1;background:transparent}.btn-ghost:hover{border-color:#fb923c;color:#9a3412}
.btn-orange{background:var(--orange);color:#fff}.btn-orange:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(249,115,22,.3)}
.btn-sm{padding:6px 10px;font-size:12px}

/* Chips & Badges */
.chip{font-size:10px;text-transform:uppercase;letter-spacing:.08em;border:1px solid #fed7aa;background:#fff7ed;color:#9a3412;border-radius:999px;padding:4px 8px}
.chip-green{border-color:#bbf7d0;background:#f0fdf4;color:#166534}
.chip-blue{border-color:#bfdbfe;background:#eff6ff;color:#1e40af}
.badge{display:inline-flex;gap:8px;align-items:center;border:1px solid #fed7aa;background:#fff7ed;color:#9a3412;border-radius:999px;padding:6px 10px;font-size:12px;font-weight:700}

/* Cards */
.card{background:var(--card);border:1px solid var(--border);border-radius:20px;padding:24px;box-shadow:0 8px 20px rgba(0,0,0,.04)}
.card:hover{box-shadow:0 12px 28px rgba(0,0,0,.07)}

/* Grid & Layout */
.section{padding:60px 0}
.cards{display:grid;gap:24px}@media(min-width:900px){.cards{grid-template-columns:repeat(2,1fr)}}
.grid-ext{display:grid;gap:32px}@media(min-width:900px){.grid-ext{grid-template-columns:1fr 320px}}

/* Typography */
h1{font-size:clamp(28px,4vw,42px);line-height:1.15;margin:12px 0 0}
h2{font-size:clamp(22px,3vw,32px);margin:0 0 8px}
h3{font-size:20px;margin:0 0 8px}
p.lead{color:var(--muted);font-size:17px;max-width:640px}
.muted{color:#64748b}
.small{font-size:12px;color:#9a3412;text-transform:uppercase;letter-spacing:.06em}

/* Lists */
.bullets{list-style:none;padding-left:0;margin:0}.bullets li{position:relative;padding-left:14px;margin-bottom:4px}.bullets li::before{content:'•';position:absolute;left:0;top:0;color:var(--orange)}

/* Extension detail page */
.ext-meta{background:var(--card);border:1px solid var(--border);border-radius:20px;padding:24px;position:sticky;top:80px}
.ext-meta dl{margin:0;display:grid;gap:12px}
.ext-meta dt{font-size:11px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin-bottom:2px}
.ext-meta dd{margin:0;font-weight:600;font-size:14px}
.ext-content h2{margin-top:32px;padding-top:16px;border-top:1px solid var(--border)}
.ext-content h2:first-child{margin-top:0;padding-top:0;border-top:none}
.ext-content h3{margin-top:20px;color:#334155}
.ext-content table{width:100%;border-collapse:collapse;font-size:14px;margin:12px 0}
.ext-content th,.ext-content td{padding:8px 12px;border:1px solid var(--border);text-align:left}
.ext-content th{background:#f1f5f9;font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.04em}
.ext-content code{background:#f1f5f9;padding:2px 6px;border-radius:6px;font-size:13px;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace}
.ext-content pre{background:#0b1220;color:#e5e7eb;border-radius:12px;padding:16px;overflow:auto;font:13px/1.6 ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;margin:12px 0}
.note{border-left:4px solid var(--orange);background:#fff7ed;padding:12px 16px;border-radius:0 12px 12px 0;margin:12px 0;font-size:14px}

/* TOC */
.toc{position:sticky;top:80px}
.toc-list{list-style:none;padding:0;margin:0;font-size:13px}
.toc-list li{margin-bottom:6px}
.toc-list a{color:var(--muted);transition:color .15s}.toc-list a:hover{color:var(--orange)}
.toc-list .active{color:var(--orange);font-weight:600}

/* Footer */
.footer{border-top:1px solid var(--border);background:#fff;padding:40px 0;color:#334155}

/* Reveal */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease}.reveal.show{opacity:1;transform:none}

/* Form */
.input{width:100%;border:1px solid #cbd5e1;border-radius:12px;padding:10px 12px;font-size:14px;font-family:inherit}
textarea.input{resize:vertical;min-height:120px}
.form-grid{display:grid;gap:12px}@media(min-width:640px){.form-grid{grid-template-columns:1fr 1fr}.form-grid .full{grid-column:1/-1}}
label{font-size:13px;font-weight:600;display:block;margin-bottom:4px}

/* Extension catalog card */
.ext-card{transition:transform .2s,box-shadow .2s}.ext-card:hover{transform:translateY(-4px);box-shadow:0 16px 32px rgba(0,0,0,.08)}
.ext-card-header{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;margin-bottom:12px}
.ext-card-title{font-weight:700;font-size:17px}
.ext-card-desc{color:var(--muted);font-size:14px;margin:0 0 12px}
.ext-card-meta{display:flex;gap:8px;flex-wrap:wrap;margin-top:auto}

/* Gradient bg */
.grad{position:absolute;inset:0;top:-120px;height:220px;background:radial-gradient(ellipse at top,rgba(249,115,22,.25),transparent 60%);filter:blur(40px);z-index:-1}

/* Language toggle */
.en .cs{display:none}.cs .en{display:none}