:root {
  --bg: #0A0E14;
  --bg2: #0D1117;
  --card: #161B22;
  --border: #21262D;
  --border2: #30363D;
  --text: #F0F4F8;
  --muted: #8B949E;
  --blue: #4A9EF5;
  --violet: #8B5CF6;
  --amber: #F59E0B;
  --green: #10B981;
  --red: #F85149;
  --grad: linear-gradient(135deg, #4A9EF5, #8B5CF6);
  --grad-warm: linear-gradient(135deg, #F59E0B, #EF4444);
  --radius: 14px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { width: 100%; max-width: 1100px; margin: 0 auto; padding: 0 24px; }
main { flex: 1; }

/* ---------- header / nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10, 14, 20, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-top: 14px; padding-bottom: 14px; flex-wrap: wrap; }
.logo { display: flex; align-items: center; gap: 9px; font-size: 17px; font-weight: 700; color: var(--text); }
.logo:hover { text-decoration: none; }
    .logo-mark {
      width: 30px; height: 30px; border-radius: 9px;
      background: var(--grad);
      display: inline-flex; align-items: center; justify-content: center;
      font-size: 15px; color: #fff;
    }
    .logo-img {
      width: 30px; height: 30px; border-radius: 9px;
      display: inline-block; object-fit: cover;
      vertical-align: middle; flex-shrink: 0;
    }
.accent { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.nav-links { display: flex; gap: 4px; flex-wrap: wrap; align-items: center; }
.nav-links a {
  color: var(--muted); font-size: 13.5px; font-weight: 500;
  padding: 7px 11px; border-radius: 8px;
}
.nav-links a:hover { color: var(--text); background: var(--card); text-decoration: none; }
.nav-links a.active { color: var(--text); background: var(--card); }
.nav-links a.cta {
  background: var(--grad); color: #fff; font-weight: 600;
}
.nav-links a.cta:hover { opacity: .9; }

/* ---------- buttons ---------- */
.btn {
  display: inline-block; padding: 13px 26px; border-radius: 11px;
  font-size: 15px; font-weight: 600; cursor: pointer; border: none;
  transition: opacity .15s, transform .15s;
}
.btn:hover { opacity: .9; text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--grad); color: #fff; }
.btn-warm { background: var(--grad-warm); color: #fff; }
.btn-ghost { background: var(--card); color: var(--text); border: 1px solid var(--border2); }
.btn-danger { background: transparent; color: var(--red); border: 1px solid rgba(248, 81, 73, .5); }
.btn-danger:hover { background: rgba(248, 81, 73, .1); }
.btn-sm { padding: 8px 16px; font-size: 13px; border-radius: 8px; }
.btn-block { display: block; width: 100%; text-align: center; }
.btn:disabled { opacity: .45; cursor: not-allowed; transform: none; }

/* ---------- hero ---------- */
.hero { padding: 84px 0 64px; text-align: center; position: relative; overflow: hidden; }
.hero::before {
  content: ''; position: absolute; inset: -40% -20% auto;
  height: 520px;
  background: radial-gradient(ellipse at center, rgba(74, 158, 245, .16), transparent 60%),
              radial-gradient(ellipse at 60% 40%, rgba(139, 92, 246, .12), transparent 55%);
  pointer-events: none;
}
.hero > .container { position: relative; }
.hero .badge { margin-bottom: 22px; }
.hero h1 { font-size: clamp(38px, 6vw, 62px); font-weight: 800; letter-spacing: -1.5px; line-height: 1.1; }
.hero p.sub { max-width: 640px; margin: 18px auto 34px; color: var(--muted); font-size: 18px; }
.hero-ctas { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.hero-meta { margin-top: 34px; color: var(--muted); font-size: 13px; }

/* ---------- badges ---------- */
.badge {
  display: inline-block; padding: 5px 14px; border-radius: 30px;
  font-size: 12px; font-weight: 600; letter-spacing: .4px;
  background: rgba(74, 158, 245, .12); color: var(--blue);
  border: 1px solid rgba(74, 158, 245, .35);
}
.badge.plus { background: rgba(245, 158, 11, .12); color: var(--amber); border-color: rgba(245, 158, 11, .4); }
.badge.ok { background: rgba(16, 185, 129, .12); color: var(--green); border-color: rgba(16, 185, 129, .4); }

/* ---------- sections / grids ---------- */
.section { padding: 56px 0; }
.section h2 { font-size: clamp(26px, 4vw, 36px); font-weight: 800; letter-spacing: -.8px; margin-bottom: 10px; }
.section .lead { color: var(--muted); font-size: 16.5px; max-width: 680px; margin-bottom: 34px; }
.grid { display: grid; gap: 18px; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); }

.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
}
.card h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; display: flex; align-items: center; gap: 9px; }
.card p { color: var(--muted); font-size: 14.5px; }
.card .icon {
  width: 34px; height: 34px; border-radius: 9px; flex-shrink: 0;
  background: rgba(74, 158, 245, .12); border: 1px solid rgba(74, 158, 245, .3);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 15px; font-weight: 700; color: var(--blue);
}
.card .icon.warm { background: rgba(245, 158, 11, .12); border-color: rgba(245, 158, 11, .35); color: var(--amber); }
.card .icon.violet { background: rgba(139, 92, 246, .12); border-color: rgba(139, 92, 246, .35); color: var(--violet); }
.card .icon.green { background: rgba(16, 185, 129, .12); border-color: rgba(16, 185, 129, .35); color: var(--green); }
.card ul { margin: 10px 0 0 18px; color: var(--muted); font-size: 14px; }
.card ul li { margin-bottom: 6px; }

/* ---------- stats ---------- */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 16px; }
.stat { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; text-align: center; }
.stat .num { font-size: 30px; font-weight: 800; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat .lbl { color: var(--muted); font-size: 12.5px; text-transform: uppercase; letter-spacing: 1px; margin-top: 4px; }

/* ---------- bands ---------- */
.band {
  background: linear-gradient(135deg, rgba(74, 158, 245, .1), rgba(139, 92, 246, .1));
  border: 1px solid rgba(74, 158, 245, .25);
  border-radius: 18px; padding: 40px; text-align: center;
}
.band h2 { font-size: 28px; font-weight: 800; margin-bottom: 10px; }
.band p { color: var(--muted); max-width: 620px; margin: 0 auto 24px; }

/* ---------- content pages ---------- */
.page { padding: 56px 0 40px; }
.page-head { margin-bottom: 36px; }
.page-head h1 { font-size: clamp(30px, 5vw, 44px); font-weight: 800; letter-spacing: -1.2px; }
.page-head p { color: var(--muted); font-size: 17px; margin-top: 10px; max-width: 720px; }
.prose { max-width: 820px; }
.prose h2 { font-size: 22px; font-weight: 700; margin: 38px 0 14px; color: var(--text); }
.prose h2 .n { color: var(--blue); margin-right: 8px; }
.prose h3 { font-size: 16.5px; font-weight: 700; margin: 24px 0 10px; }
.prose p, .prose li { color: #C9D1D9; font-size: 15px; }
.prose p { margin-bottom: 14px; }
.prose ul, .prose ol { margin: 0 0 16px 22px; }
.prose li { margin-bottom: 8px; }
.prose a { color: var(--blue); }
.highlight {
  background: rgba(74, 158, 245, .07);
  border-left: 3px solid var(--blue);
  padding: 14px 18px; border-radius: 0 10px 10px 0;
  margin: 18px 0;
}
.highlight p { margin: 0; color: var(--text); font-size: 14.5px; }
.warning { border-left-color: var(--red); background: rgba(248, 81, 73, .07); }
.success { border-left-color: var(--green); background: rgba(16, 185, 129, .07); }

code, .mono {
  font-family: 'JetBrains Mono', ui-monospace, 'Cascadia Code', Consolas, monospace;
  font-size: 13.5px;
}
code {
  background: var(--bg2); border: 1px solid var(--border);
  padding: 2px 7px; border-radius: 6px; color: #9ECBFF;
}
pre {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: 10px; padding: 16px 18px; overflow-x: auto; margin: 14px 0;
}
pre code { background: none; border: none; padding: 0; }

/* ---------- tables ---------- */
.tbl-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); }
table.tbl { width: 100%; border-collapse: collapse; background: var(--card); }
.tbl th {
  background: var(--bg2); padding: 12px 16px; text-align: left;
  font-size: 11.5px; color: var(--muted); text-transform: uppercase; letter-spacing: 1px;
}
.tbl td { padding: 12px 16px; border-top: 1px solid var(--border); font-size: 14px; }
.tbl tr:hover td { background: #1C2129; }

/* ---------- forms ---------- */
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .8px; margin-bottom: 7px; font-weight: 600; }
.field input, .field select, .field textarea {
  width: 100%; padding: 12px 15px; background: var(--bg2);
  border: 1px solid var(--border2); border-radius: 10px;
  color: var(--text); font-size: 14.5px; outline: none; font-family: inherit;
}
.field input:focus { border-color: var(--blue); }
.form-error { color: var(--red); font-size: 13.5px; min-height: 20px; margin-top: 6px; }
.form-note { color: var(--muted); font-size: 13px; margin-top: 8px; }

/* ---------- download ---------- */
.dl-card { max-width: 560px; margin: 0 auto; text-align: center; padding: 40px 32px; }
.dl-card .app-icon {
  width: 76px; height: 76px; border-radius: 20px; margin: 0 auto 18px;
  background: var(--grad); display: flex; align-items: center; justify-content: center;
  font-size: 34px; font-weight: 800; color: #fff;
  box-shadow: 0 12px 40px rgba(74, 158, 245, .35);
}
.dl-meta { display: flex; justify-content: center; gap: 26px; margin: 18px 0 26px; flex-wrap: wrap; }
.dl-meta div { text-align: center; }
.dl-meta .v { font-weight: 700; font-size: 15px; }
.dl-meta .k { color: var(--muted); font-size: 11.5px; text-transform: uppercase; letter-spacing: 1px; }
.sha { font-size: 11.5px; color: var(--muted); word-break: break-all; margin-top: 18px; }

/* ---------- steps ---------- */
.steps { counter-reset: s; display: grid; gap: 14px; }
.step {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px 20px 18px 58px; position: relative;
}
.step::before {
  counter-increment: s; content: counter(s);
  position: absolute; left: 18px; top: 18px;
  width: 26px; height: 26px; border-radius: 8px;
  background: var(--grad); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700;
}
.step h4 { font-size: 15px; margin-bottom: 4px; }
.step p { color: var(--muted); font-size: 14px; }

/* ---------- danger zone ---------- */
.danger {
  border: 1px solid rgba(248, 81, 73, .4);
  background: rgba(248, 81, 73, .05);
  border-radius: var(--radius); padding: 28px;
}
.danger h3 { color: var(--red); font-size: 18px; margin-bottom: 8px; }
.check { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; color: #C9D1D9; margin: 16px 0; cursor: pointer; }
.check input { margin-top: 4px; accent-color: var(--red); width: 16px; height: 16px; }

/* ---------- toast ---------- */
.toast {
  position: fixed; bottom: 24px; right: 24px; z-index: 999;
  padding: 13px 22px; border-radius: 11px; font-size: 14px; font-weight: 500;
  transform: translateY(120px); opacity: 0; transition: all .3s;
  box-shadow: 0 10px 34px rgba(0, 0, 0, .5);
}
.toast.show { transform: translateY(0); opacity: 1; }
.toast.success { background: var(--green); color: #fff; }
.toast.error { background: var(--red); color: #fff; }

/* ---------- footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg2);
  margin-top: 64px;
  padding: 44px 0 30px;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 34px; }
.footer-grid h5 { font-size: 12.5px; text-transform: uppercase; letter-spacing: 1.2px; color: var(--muted); margin-bottom: 14px; }
.footer-grid a { display: block; color: #C9D1D9; font-size: 14px; margin-bottom: 9px; }
.footer-grid a:hover { color: var(--blue); }
.footer-brand p { color: var(--muted); font-size: 13.5px; margin-top: 12px; max-width: 320px; }
.footer-bottom {
  border-top: 1px solid var(--border);
  margin-top: 34px; padding-top: 20px;
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  color: var(--muted); font-size: 13px;
}

/* ---------- hidden ---------- */
.hidden { display: none !important; }

/* ---------- responsive ---------- */
@media (max-width: 760px) {
  .footer-grid { grid-template-columns: 1fr; gap: 26px; }
  .hero { padding: 56px 0 44px; }
  .band { padding: 28px 20px; }
  .nav { justify-content: center; }
}