:root {
  --bg: #0b0c10;
  --panel: #111218;
  --text: #e7e9ee;
  --muted: #a7aec2;
  --brand: #7c5cff;
  --brand-600: #6a4df0;
  --brand-700: #5a41db;
  --ring: rgba(124, 92, 255, 0.35);
  --card: #151724;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  background: radial-gradient(1200px 600px at 80% -10%, rgba(124,92,255,.08), transparent 50%),
              radial-gradient(800px 400px at 10% -10%, rgba(0,200,255,.06), transparent 50%),
              var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.container {
  max-width: 1120px;
  margin-inline: auto;
  padding: 0 20px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: saturate(1.2) blur(8px);
  background: linear-gradient(to bottom, rgba(11,12,16,.85), rgba(11,12,16,.35));
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; }
.brand { color: #fff; text-decoration: none; font-weight: 700; font-size: 1.15rem; letter-spacing: .2px; }
.nav-list { display: flex; gap: 18px; list-style: none; margin: 0; padding: 0; }
.nav-list a { color: var(--muted); text-decoration: none; padding: 8px 10px; border-radius: 10px; }
.nav-list a:hover { color: #fff; background: rgba(255,255,255,.06); }
.nav-toggle { display: none; }

.hero { padding: 56px 0 18px; }
.hero-inner { display: grid; grid-template-columns: 1.1fr .9fr; align-items: center; gap: 36px; }
.hero-copy h1 { font-size: clamp(2rem, 3.6vw, 3rem); line-height: 1.1; margin: 0 0 12px; }
.hero-copy p { margin: 0 0 20px; color: var(--muted); max-width: 54ch; }
.hero-actions { display: flex; gap: 12px; }
.hero-media img { width: 100%; height: auto; border-radius: 16px; box-shadow: 0 20px 60px rgba(0,0,0,.35); }

.btn { display: inline-flex; align-items: center; justify-content: center; padding: 10px 16px; border-radius: 12px; text-decoration: none; font-weight: 600; border: 1px solid transparent; transition: .2s ease; }
.btn-primary { background: linear-gradient(180deg, var(--brand), var(--brand-700)); color: #fff; box-shadow: 0 8px 24px var(--ring); }
.btn-primary:hover { transform: translateY(-1px); filter: brightness(1.05); }
.btn-secondary { color: #fff; border-color: rgba(255,255,255,.15); background: rgba(255,255,255,.04); }
.btn-secondary:hover { background: rgba(255,255,255,.08); }

.section { padding: 56px 0; }
.section.alt { background: linear-gradient(180deg, rgba(255,255,255,.02), transparent); border-top: 1px solid rgba(255,255,255,.06); border-bottom: 1px solid rgba(255,255,255,.06); }
.section-title { font-size: 1.6rem; margin: 0 0 18px; }

.card-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.card { color: inherit; text-decoration: none; background: var(--card); border: 1px solid rgba(255,255,255,.06); border-radius: 16px; overflow: hidden; transition: transform .15s ease, box-shadow .15s ease; }
.card:hover { transform: translateY(-3px); box-shadow: 0 14px 50px rgba(0,0,0,.35); }
.card figure { margin: 0; display: grid; grid-template-rows: 160px auto; }
.card img { width: 100%; height: 160px; object-fit: cover; }
.card figcaption { padding: 12px 14px; }
.card h3 { margin: 0 0 6px; font-size: 1.05rem; }
.card p { margin: 0; color: var(--muted); font-size: .95rem; }

.tips { display: grid; grid-template-columns: 1.2fr .8fr; gap: 24px; align-items: start; }
.checklist { margin: 10px 0 0; padding-left: 1.1em; }
.checklist li { margin: 8px 0; }

.site-footer { padding: 20px 0 40px; color: var(--muted); }
.footer-inner { display: flex; justify-content: space-between; align-items: center; border-top: 1px solid rgba(255,255,255,.06); padding-top: 20px; }
.footer-links { display: flex; gap: 10px; align-items: center; }
.footer-links a { color: var(--muted); text-decoration: none; }
.footer-links a:hover { color: #fff; }

.to-top { position: fixed; right: 16px; bottom: 16px; padding: 10px 12px; border-radius: 10px; border: 1px solid rgba(255,255,255,.2); background: rgba(0,0,0,.35); color: #fff; display: none; cursor: pointer; }
.to-top.show { display: inline-flex; }

/* Category page */
.page-header { padding: 40px 0 10px; border-bottom: 1px solid rgba(255,255,255,.06); background: linear-gradient(180deg, rgba(255,255,255,.02), transparent); }
.breadcrumbs { color: var(--muted); font-size: .95rem; }
.page-title { margin: 8px 0 0; font-size: 2rem; }
.grid-2 { display: grid; grid-template-columns: 1.1fr .9fr; gap: 26px; }
.card-article { background: var(--card); border: 1px solid rgba(255,255,255,.06); border-radius: 16px; overflow: hidden; }
.card-article img { width: 100%; height: 220px; object-fit: cover; }
.card-article .content { padding: 16px; }
.note { color: var(--muted); font-size: .95rem; }
.callout { background: linear-gradient(180deg, rgba(124,92,255,.12), rgba(124,92,255,.07)); border: 1px solid rgba(124,92,255,.35); border-radius: 14px; padding: 14px 16px; }

@media (max-width: 1024px) {
  .card-grid { grid-template-columns: repeat(3, 1fr); }
  .hero-inner { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .nav-toggle { display: inline-flex; background: none; border: 1px solid rgba(255,255,255,.15); color: #fff; padding: 8px 10px; border-radius: 10px; }
  .nav-list { display: none; position: absolute; right: 20px; top: 54px; background: var(--panel); border: 1px solid rgba(255,255,255,.06); border-radius: 12px; padding: 10px; width: 220px; flex-direction: column; }
  .nav-list.show { display: flex; }
  .card-grid { grid-template-columns: 1fr; }
  .tips { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
}