/* TechFix Hub — modern UI. No frameworks, no webfonts, fast by design. */
:root {
  --ink: #0f172a;
  --body: #334155;
  --muted: #64748b;
  --line: #e2e8f0;
  --paper: #f8fafc;
  --card: #ffffff;
  --brand: #4f46e5;
  --brand-2: #06b6d4;
  --brand-soft: #eef2ff;
  --gold: #f59e0b;
  --radius: 16px;
  --shadow: 0 1px 2px rgba(15, 23, 42, 0.06), 0 8px 24px rgba(15, 23, 42, 0.06);
  --shadow-lift: 0 2px 4px rgba(15, 23, 42, 0.08), 0 16px 32px rgba(15, 23, 42, 0.12);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; margin: 0; color: var(--body); line-height: 1.7; background: var(--paper); -webkit-font-smoothing: antialiased; }
.wrap { max-width: 860px; margin: 0 auto; padding: 0 22px; }
a { color: var(--brand); }
a:hover { color: #3730a3; }

/* Header */
header { background: rgba(15, 23, 42, 0.96); color: #fff; padding: 14px 0; position: sticky; top: 0; z-index: 10; backdrop-filter: blur(8px); box-shadow: 0 1px 0 rgba(255, 255, 255, 0.08); }
header .wrap { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px; }
.logo { color: #fff; text-decoration: none; font-weight: 800; font-size: 1.3rem; letter-spacing: -0.02em; }
.logo span { color: #818cf8; }
nav a { color: #cbd5e1; text-decoration: none; margin-left: 18px; font-weight: 500; }
nav a:hover, nav a[aria-current="page"] { color: #fff; }
.nav-toggle { display: none; background: none; border: 1px solid #475569; color: #fff; border-radius: 10px; padding: 6px 12px; font-size: 1.1rem; cursor: pointer; }
@media (max-width: 640px) {
  .nav-toggle { display: block; }
  #main-nav { display: none; width: 100%; }
  #main-nav.open { display: flex; flex-direction: column; gap: 10px; padding: 8px 0 4px; }
  #main-nav a { margin-left: 0; }
}

/* Hero */
.hero { padding: 56px 0 36px; }
.hero-panel { background: linear-gradient(135deg, #1e1b4b 0%, #4f46e5 55%, #0891b2 100%); border-radius: 24px; padding: 40px 36px; color: #fff; box-shadow: var(--shadow-lift); }
.hero-panel h1 { font-size: 2.7rem; line-height: 1.1; margin: 12px 0; color: #fff; letter-spacing: -0.03em; }
.hero-panel p { font-size: 1.15rem; color: #e0e7ff; max-width: 560px; }
.eyebrow { display: inline-block; background: rgba(255, 255, 255, 0.16); border: 1px solid rgba(255, 255, 255, 0.25); color: #fff; font-size: 0.8rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; padding: 5px 12px; border-radius: 999px; }
.hero-stats { display: flex; gap: 28px; margin-top: 24px; flex-wrap: wrap; }
.hero-stats div b { display: block; font-size: 1.4rem; color: #fff; line-height: 1.2; }
.hero-stats div span { font-size: 0.85rem; color: #c7d2fe; }
.search-label { font-weight: 700; display: block; margin-top: 28px; color: var(--ink); }
#site-search { width: 100%; padding: 14px 16px; border: 1px solid var(--line); border-radius: 12px; font-size: 1rem; margin-top: 8px; background: #fff; box-shadow: var(--shadow); }
#site-search:focus { outline: 2px solid var(--brand); border-color: var(--brand); }
.signup { display: flex; gap: 10px; margin-top: 20px; flex-wrap: wrap; }
.signup input { flex: 1; min-width: 220px; padding: 13px 16px; border: 1px solid var(--line); border-radius: 12px; font-size: 1rem; }
.signup button, .btn { background: linear-gradient(135deg, var(--brand), #7c3aed); color: #fff; border: none; padding: 13px 22px; border-radius: 12px; font-size: 1rem; font-weight: 700; cursor: pointer; text-decoration: none; display: inline-block; box-shadow: 0 6px 16px rgba(79, 70, 229, 0.35); transition: transform 0.15s ease, box-shadow 0.15s ease; }
.signup button:hover, .btn:hover { transform: translateY(-1px); box-shadow: 0 10px 22px rgba(79, 70, 229, 0.4); color: #fff; }
.small { font-size: 0.85rem; color: var(--muted); }

/* Section headings */
h2 { margin-top: 44px; color: var(--ink); letter-spacing: -0.02em; font-size: 1.55rem; }
h2::after { content: ""; display: block; width: 44px; height: 4px; border-radius: 4px; background: linear-gradient(90deg, var(--brand), var(--brand-2)); margin-top: 8px; }

/* Cards */
.cards { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 640px) { .cards { grid-template-columns: 1fr; } }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); transition: transform 0.18s ease, box-shadow 0.18s ease; display: flex; flex-direction: column; }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lift); }
.card-art { font-size: 2.4rem; padding: 22px 22px 8px; color: #fff; }
.art-wifi { background: linear-gradient(135deg, #4f46e5, #06b6d4); }
.art-printer { background: linear-gradient(135deg, #0f766e, #22c55e); }
.art-router { background: linear-gradient(135deg, #b45309, #f59e0b); }
.card-body { padding: 18px 22px 22px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.card h3 { margin: 0; font-size: 1.15rem; line-height: 1.4; }
.card h3 a { color: var(--ink); text-decoration: none; }
.card h3 a:hover { color: var(--brand); }
.card p { margin: 0; color: var(--body); }
.tag { background: var(--brand-soft); color: #4338ca; padding: 3px 10px; border-radius: 999px; font-size: 0.78rem; font-weight: 700; }
.time { color: var(--muted); font-size: 0.85rem; margin-left: 8px; }

/* Article */
.article { padding: 32px 28px 56px; background: #fff; border: 1px solid var(--line); border-radius: 20px; margin-top: 28px; box-shadow: var(--shadow); }
.article h1 { color: var(--ink); letter-spacing: -0.025em; line-height: 1.2; font-size: 2.1rem; }
.crumb { color: var(--muted); font-size: 0.9rem; }
.crumb a { color: var(--brand); text-decoration: none; }
.meta { color: var(--muted); }
.toc { background: var(--paper); border: 1px solid var(--line); border-radius: 14px; padding: 18px 22px; margin: 28px 0; }
.toc a { color: var(--brand); text-decoration: none; }
.toc a:hover { text-decoration: underline; }
pre { background: #0f172a; color: #e2e8f0; padding: 18px; border-radius: 12px; overflow-x: auto; }
code { font-size: 0.95rem; }
table { width: 100%; border-collapse: collapse; margin: 18px 0; border-radius: 12px; overflow: hidden; }
th, td { border: 1px solid var(--line); padding: 12px; text-align: left; }
th { background: #f1f5f9; color: var(--ink); }
.product { background: linear-gradient(135deg, #eef2ff, #ecfeff); border: 1px solid #c7d2fe; border-radius: var(--radius); padding: 24px; margin: 32px 0; }
.product h3 { margin-top: 0; color: var(--ink); }
.disclosure { background: #f1f5f9; border-radius: 14px; padding: 20px 22px; margin-top: 44px; }
.faq details { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 18px 22px; margin-bottom: 12px; box-shadow: var(--shadow); }
.faq summary { font-weight: 700; cursor: pointer; color: var(--ink); }
footer { margin-top: 48px; border-top: 1px solid var(--line); padding: 28px 0; color: var(--muted); }
footer a { color: var(--brand); text-decoration: none; }