:root {
  --bg: #0b1020;
  --bg-2: #0e1428;
  --panel: #131a2e;
  --panel-2: #161d34;
  --border: #1e2740;
  --text: #e6e9f2;
  --muted: #9aa3b2;
  --dim: #5f6680;
  --accent: #f6821f;
  --accent-2: #ff9a3c;
  --code-bg: #05080f;
  --radius: 14px;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(246, 130, 31, 0.10), transparent 60%),
    radial-gradient(900px 500px at -10% 10%, rgba(58, 134, 255, 0.08), transparent 55%),
    var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { width: 100%; max-width: 1080px; margin: 0 auto; padding: 0 20px; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 20;
  background: rgba(11, 16, 32, 0.72);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--border);
}
.site-header .row { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.05rem; color: var(--text); }
.brand img { width: 28px; height: 28px; border-radius: 7px; }
.brand span { color: var(--accent); }
.nav { display: flex; align-items: center; gap: 22px; }
.nav a { color: var(--muted); font-size: 0.92rem; }
.nav a:hover { color: var(--text); }
.nav .btn { color: #0b1020; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 16px; border-radius: 10px; font-weight: 600; font-size: 0.92rem;
  border: 1px solid transparent; cursor: pointer; transition: transform .08s ease, background .15s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: linear-gradient(135deg, var(--accent-2), var(--accent)); color: #1a0f00; }
.btn-ghost { background: transparent; border-color: var(--border); color: var(--text); }
.btn-ghost:hover { border-color: var(--accent); }

/* ---------- Hero ---------- */
.hero { padding: 84px 0 56px; text-align: center; }
.hero .tag {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--panel); border: 1px solid var(--border); color: var(--muted);
  padding: 6px 14px; border-radius: 999px; font-size: 0.82rem; margin-bottom: 22px;
}
.hero .tag b { color: var(--accent-2); }
.hero h1 { font-size: clamp(2.1rem, 5vw, 3.4rem); line-height: 1.08; margin: 0 0 16px; letter-spacing: -0.02em; }
.hero h1 .hl { background: linear-gradient(135deg, var(--accent-2), var(--accent)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lead { font-size: 1.15rem; color: var(--muted); max-width: 640px; margin: 0 auto 30px; }
.hero .cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* ---------- Sections ---------- */
section.block { padding: 56px 0; }
.section-head { text-align: center; margin-bottom: 40px; }
.section-head h2 { font-size: clamp(1.5rem, 3vw, 2rem); margin: 0 0 10px; letter-spacing: -0.01em; }
.section-head p { color: var(--muted); margin: 0; }

.grid { display: grid; gap: 16px; }
.cards { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.card {
  background: linear-gradient(180deg, var(--panel-2), var(--panel));
  border: 1px solid var(--border); border-radius: var(--radius); padding: 22px;
  transition: border-color .15s ease, transform .15s ease;
}
.card:hover { border-color: #2b3760; transform: translateY(-2px); }
.card .ico { width: 36px; height: 36px; border-radius: 9px; display: grid; place-items: center; background: rgba(246,130,31,.12); color: var(--accent); margin-bottom: 14px; }
.card h3 { margin: 0 0 6px; font-size: 1.05rem; }
.card p { margin: 0; color: var(--muted); font-size: 0.93rem; }

/* ---------- Steps ---------- */
.steps { counter-reset: step; display: grid; gap: 14px; }
.step { display: grid; grid-template-columns: 44px 1fr; gap: 16px; align-items: start;
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 20px; }
.step .num { counter-increment: step; }
.step .num::before {
  content: counter(step); display: grid; place-items: center;
  width: 36px; height: 36px; border-radius: 9px; font-weight: 700; color: #1a0f00;
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
}
.step h4 { margin: 4px 0 4px; font-size: 1rem; }
.step p { margin: 0; color: var(--muted); font-size: 0.92rem; }

/* ---------- Code ---------- */
.code-wrap { position: relative; }
pre {
  background: var(--code-bg); border: 1px solid var(--border); border-radius: 12px;
  padding: 16px 18px; overflow-x: auto; font-size: 0.86rem; line-height: 1.7; margin: 0;
}
pre code { color: #c9d1e3; font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; }
.k { color: var(--accent-2); }
.s { color: #8bd5ff; }
.c { color: #5f6680; }
.copy {
  position: absolute; top: 8px; right: 8px; background: var(--panel); border: 1px solid var(--border);
  color: var(--muted); border-radius: 7px; padding: 4px 9px; font-size: 0.75rem; cursor: pointer;
}
.copy:hover { color: var(--text); border-color: var(--accent); }
.tabs { display: flex; gap: 6px; margin-bottom: 0; }
.tab {
  background: var(--panel); border: 1px solid var(--border); border-bottom: none;
  color: var(--muted); padding: 8px 14px; border-radius: 9px 9px 0 0; cursor: pointer; font-size: 0.85rem;
}
.tab.active { color: var(--accent-2); background: var(--code-bg); border-color: var(--border); }
.code-panel { display: none; }
.code-panel.active { display: block; }

.note {
  border-left: 3px solid var(--accent); background: rgba(246,130,31,.06);
  border-radius: 0 10px 10px 0; padding: 14px 18px; color: var(--muted); font-size: 0.93rem;
}
.note b { color: var(--text); }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--border); margin-top: 40px; padding: 36px 0; color: var(--dim); font-size: 0.88rem; }
.site-footer .row { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; align-items: center; }
.site-footer a { color: var(--muted); }
.ad-slot { display: block; margin: 0 auto 24px; min-height: 90px; max-width: 970px; }

@media (max-width: 640px) {
  .nav .hide-sm { display: none; }
  .hero { padding: 56px 0 36px; }
}