:root {
  --bg: #07080d;
  --bg-2: #0b0d14;
  --panel: rgba(18, 21, 32, 0.72);
  --panel-solid: #12151f;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.16);
  --txt: #e9edf7;
  --muted: #8d97ad;
  --accent: #00e5ff;
  --accent-2: #7c5cff;
  --accent-3: #ff4d8d;
  --ok: #31e0a1;
  --radius: 18px;
  --max: 1180px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--txt);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

code { font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace; }

a { color: inherit; text-decoration: none; }

.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 22px; }

/* background */
.bg-grid {
  position: fixed; inset: 0; z-index: -2;
  background-image: linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 75%);
}
.bg-glow {
  position: fixed; inset: -20% -10% auto -10%; height: 70vh; z-index: -1;
  background: radial-gradient(45% 55% at 50% 0%, rgba(0,229,255,.16), transparent 70%),
              radial-gradient(35% 45% at 80% 10%, rgba(124,92,255,.16), transparent 70%);
  filter: blur(20px);
}

/* nav */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(16px);
  background: rgba(7,8,13,.72);
  border-bottom: 1px solid var(--line);
}
.nav-inner { max-width: var(--max); margin: 0 auto; padding: 12px 22px; display: flex; align-items: center; gap: 18px; }
.brand { display: flex; align-items: center; gap: 11px; font-weight: 700; letter-spacing: .08em; }
.brand-mark {
  width: 34px; height: 34px; border-radius: 11px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #04060c; font-weight: 900; box-shadow: 0 6px 24px rgba(0,229,255,.28);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.05; font-size: 15px; }
.brand-text small { font-size: 10px; letter-spacing: .22em; text-transform: uppercase; color: var(--muted); font-weight: 500; }
.brand.small .brand-mark { width: 28px; height: 28px; border-radius: 9px; font-size: 13px; }
.nav-links { margin-left: auto; display: flex; align-items: center; gap: 22px; font-size: 14.5px; color: var(--muted); }
.nav-links a:hover { color: var(--txt); }
.nav-toggle { display: none; margin-left: auto; background: none; border: 1px solid var(--line-strong); border-radius: 10px; width: 40px; height: 36px; cursor: pointer; }
.nav-toggle span { display: block; width: 18px; height: 2px; margin: 4px auto; background: var(--txt); border-radius: 2px; }

/* buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 20px; border-radius: 12px; border: 1px solid var(--line-strong);
  background: rgba(255,255,255,.04); color: var(--txt); font-weight: 600; font-size: 15px;
  cursor: pointer; transition: transform .15s ease, border-color .15s ease, background .15s ease, box-shadow .15s ease;
}
.btn:hover { transform: translateY(-1px); border-color: rgba(255,255,255,.3); }
.btn:active { transform: translateY(0); }
.btn-sm { padding: 8px 14px; font-size: 13.5px; border-radius: 10px; }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: transparent; color: #05070d; font-weight: 700;
  box-shadow: 0 10px 30px rgba(0,229,255,.22);
}
.btn-ghost { background: transparent; }

/* hero */
.hero { padding: 86px 22px 70px; text-align: center; max-width: 900px; }
.pill {
  display: inline-flex; align-items: center; gap: 9px; padding: 6px 14px; border-radius: 999px;
  border: 1px solid var(--line-strong); background: rgba(255,255,255,.04); color: var(--muted); font-size: 13px;
}
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 12px var(--ok); }
h1 { font-size: clamp(40px, 7vw, 74px); line-height: 1.04; margin: 22px 0 18px; letter-spacing: -.03em; font-weight: 800; }
.grad { background: linear-gradient(100deg, var(--accent), var(--accent-2) 55%, var(--accent-3)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lead { color: var(--muted); font-size: clamp(16px, 2.2vw, 19px); max-width: 720px; margin: 0 auto 30px; }
.hero-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.hero-actions.center { justify-content: center; }
.stat-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-top: 48px; }
.stat { border: 1px solid var(--line); background: var(--panel); border-radius: var(--radius); padding: 18px 12px; backdrop-filter: blur(10px); }
.stat b { display: block; font-size: 20px; letter-spacing: -.01em; }
.stat span { color: var(--muted); font-size: 12.5px; text-transform: uppercase; letter-spacing: .14em; }

/* sections */
.section { padding: 70px 22px; }
.section-head { max-width: 640px; margin-bottom: 34px; }
.section-head h2 { font-size: clamp(26px, 4vw, 38px); margin: 0 0 10px; letter-spacing: -.02em; }
.section-head p { color: var(--muted); margin: 0; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(270px, 1fr)); gap: 16px; }
.grid.three { grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); margin-top: 16px; }
.card {
  border: 1px solid var(--line); background: var(--panel); border-radius: var(--radius);
  padding: 24px; backdrop-filter: blur(10px); transition: transform .18s ease, border-color .18s ease;
}
.card:hover { transform: translateY(-3px); border-color: var(--line-strong); }
.card h3 { margin: 14px 0 8px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); font-size: 14.5px; }
.card.mini p { font-size: 14px; }
.ico {
  width: 42px; height: 42px; border-radius: 12px; display: grid; place-items: center;
  background: linear-gradient(135deg, rgba(0,229,255,.16), rgba(124,92,255,.16));
  border: 1px solid var(--line-strong); color: var(--accent); font-size: 19px;
}

/* install */
.install-card { border: 1px solid var(--line); background: var(--panel); border-radius: var(--radius); padding: 22px; }
.code-row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.code-row code {
  flex: 1 1 320px; background: #05070d; border: 1px solid var(--line); border-radius: 12px;
  padding: 14px 16px; font-size: 13.5px; overflow-x: auto; white-space: nowrap; color: #b8f6ff;
}
.hint { color: var(--muted); font-size: 13.5px; margin: 12px 0 0; }
.tabs { display: flex; gap: 8px; margin: 22px 0 14px; flex-wrap: wrap; }
.tab {
  padding: 9px 16px; border-radius: 10px; border: 1px solid var(--line-strong); background: transparent;
  color: var(--muted); cursor: pointer; font-size: 14px; font-weight: 600;
}
.tab.active { color: #05070d; background: linear-gradient(135deg, var(--accent), var(--accent-2)); border-color: transparent; }
.panel { display: none; border: 1px solid var(--line); background: var(--panel); border-radius: var(--radius); padding: 24px; }
.panel.active { display: block; }
.steps { margin: 0; padding-left: 20px; color: var(--muted); }
.steps li { margin-bottom: 8px; }
.steps strong, .steps em { color: var(--txt); }

/* keys */
.key-card { border: 1px solid var(--line); background: var(--panel); border-radius: var(--radius); padding: 24px; }
.key-head { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; flex-wrap: wrap; }
.badge { padding: 4px 12px; border-radius: 999px; background: rgba(49,224,161,.14); color: var(--ok); font-size: 12.5px; font-weight: 700; letter-spacing: .06em; }
.muted { color: var(--muted); font-size: 14px; }
.field { display: block; margin-bottom: 14px; }
.field span { display: block; font-size: 13px; color: var(--muted); margin-bottom: 7px; }
.field input {
  width: 100%; padding: 13px 15px; border-radius: 12px; border: 1px solid var(--line-strong);
  background: #05070d; color: var(--txt); font-size: 14.5px; font-family: inherit; outline: none;
}
.field input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(0,229,255,.14); }
.key-result { margin-top: 16px; display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.key-result code {
  flex: 1 1 260px; background: rgba(49,224,161,.1); border: 1px solid rgba(49,224,161,.3); color: #9dffd8;
  border-radius: 12px; padding: 13px 15px; font-size: 15px; letter-spacing: .06em;
}
.key-error { margin-top: 14px; color: #ff8a8a; font-size: 14px; }

/* changelog */
.release { border: 1px solid var(--line); background: var(--panel); border-radius: var(--radius); padding: 24px; }
.release h3 { margin: 0 0 4px; font-size: 19px; }
.release .date { color: var(--muted); font-size: 13px; }
.release ul { margin: 16px 0 0; padding-left: 20px; color: var(--muted); }
.release li { margin-bottom: 6px; }

/* faq */
.faq { border: 1px solid var(--line); background: var(--panel); border-radius: 14px; margin-bottom: 10px; padding: 0 20px; }
.faq summary { cursor: pointer; padding: 16px 0; font-weight: 600; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; float: right; color: var(--accent); font-size: 20px; line-height: 1; }
.faq[open] summary::after { content: "–"; }
.faq p { color: var(--muted); margin: 0 0 18px; font-size: 14.5px; }

/* cta + footer */
.cta-inner { text-align: center; border: 1px solid var(--line); background: linear-gradient(180deg, rgba(0,229,255,.07), rgba(124,92,255,.05)); border-radius: 26px; padding: 54px 26px; }
.cta h2 { margin: 0 0 8px; font-size: clamp(26px, 4vw, 38px); }
.cta p { color: var(--muted); margin: 0 0 24px; }
.footer { border-top: 1px solid var(--line); padding-top: 34px; padding-bottom: 46px; }
.footer-inner { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.footer p { margin: 10px 0 0; font-size: 13.5px; max-width: 420px; }
.footer-links { display: flex; gap: 18px; flex-wrap: wrap; color: var(--muted); font-size: 14px; align-items: flex-start; }
.footer-links a:hover { color: var(--txt); }

/* toast */
.toast {
  position: fixed; left: 50%; bottom: 26px; transform: translate(-50%, 140%);
  background: #05070d; border: 1px solid var(--line-strong); color: var(--txt);
  padding: 12px 20px; border-radius: 12px; font-size: 14px; z-index: 99;
  transition: transform .25s cubic-bezier(.2,.9,.3,1.2); box-shadow: 0 20px 50px rgba(0,0,0,.5);
}
.toast.show { transform: translate(-50%, 0); }

/* responsive */
@media (max-width: 860px) {
  .nav-links {
    position: fixed; inset: 58px 0 auto 0; flex-direction: column; align-items: flex-start; gap: 0;
    background: rgba(7,8,13,.97); border-bottom: 1px solid var(--line); padding: 10px 22px 20px; display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 11px 0; width: 100%; }
  .nav-toggle { display: block; }
  .stat-row { grid-template-columns: repeat(2, 1fr); }
  .hero { padding-top: 62px; }
  .section { padding: 54px 22px; }
}

@media (max-width: 520px) {
  .stat-row { grid-template-columns: 1fr 1fr; }
  .code-row code { font-size: 12px; }
  .hero-actions .btn { width: 100%; }
}