:root {
  --bg: #F3F3F6;
  --surface: #FFFFFF;
  --glass: rgba(255,255,255,.72);
  --text: #121218;
  --dim: #55566A;
  --stroke: #DCDCE4;
  --fill: #7C5CFF;
  --ink: #5B3FD6;
  --on-fill: #FFFFFF;
  --btn: #121218;
  --on-btn: #F3F3F6;
  --track: #DCDCE4;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121218;
    --surface: #1B1B23;
    --glass: rgba(40,40,52,.72);
    --text: #EDEDF2;
    --dim: #A3A4B5;
    --stroke: #2E2E3A;
    --fill: #7C5CFF;
    --ink: #B9A8FF;
    --on-fill: #FFFFFF;
    --btn: #EDEDF2;
    --on-btn: #121218;
    --track: #33333F;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 400 17px/1.6 "Sora", system-ui, -apple-system, "Segoe UI", sans-serif; }
a { color: var(--ink); text-decoration: none; }
a:hover { text-decoration: underline; }
.mono, .num { font-family: "DM Mono", ui-monospace, monospace; font-variant-numeric: tabular-nums; }
.mono { letter-spacing: .08em; text-transform: uppercase; font-size: 12px; }
.wrap { max-width: 980px; margin: 0 auto; padding: 0 20px; }
header.top { display: flex; align-items: center; gap: 10px; padding: 22px 0; }
header.top img { width: 30px; height: 30px; border-radius: 8px; }
header.top b { font-family: "DM Mono", ui-monospace, monospace; font-weight: 500; letter-spacing: .2em; font-size: 14px; }
header.top nav { margin-left: auto; display: flex; gap: 18px; font-size: 15px; }
header.top nav a { color: var(--dim); }
.hero { display: grid; grid-template-columns: 1.15fr .85fr; gap: 40px; align-items: center; padding: 40px 0 20px; }
.hero .mono { color: var(--dim); }
.hero h1 { font-weight: 500; font-size: clamp(36px, 6.4vw, 60px); line-height: 1.06; letter-spacing: -.035em; margin: 14px 0 20px; }
.hero p { color: var(--dim); font-size: 18px; max-width: 32em; margin: 0 0 28px; }
.btn { display: inline-flex; align-items: center; gap: 10px; background: var(--btn); color: var(--on-btn); padding: 15px 26px; border-radius: 999px; font-weight: 500; }
.btn:hover { text-decoration: none; opacity: .92; }
.note { color: var(--dim); font-size: 14px !important; margin-top: 14px !important; }
.stage { background: var(--surface); border: .5px solid var(--stroke); border-radius: 28px; padding: 32px 24px; display: flex; flex-direction: column; align-items: center; gap: 22px; }
.menu { display: grid; grid-template-columns: repeat(3, 64px); gap: 14px; }
.k, .ball { width: 64px; height: 64px; border-radius: 50%; display: grid; place-items: center; background: var(--glass); border: .5px solid var(--stroke); box-shadow: 0 6px 18px rgba(18,18,24,.10); font-size: 22px; color: var(--text); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); }
.k.t { font-family: "DM Mono", ui-monospace, monospace; font-size: 10.5px; letter-spacing: .06em; font-weight: 500; }
.k.on { background: var(--fill); color: var(--on-fill); border-color: transparent; }
.ball { position: relative; }
.ball .ring { position: absolute; inset: 3px; border-radius: 50%; background: conic-gradient(var(--fill) 0 168deg, var(--track) 168deg 360deg); -webkit-mask: radial-gradient(farthest-side, transparent calc(100% - 4px), #000 calc(100% - 3px)); mask: radial-gradient(farthest-side, transparent calc(100% - 4px), #000 calc(100% - 3px)); }
.ball b { font-family: "DM Mono", ui-monospace, monospace; font-weight: 500; font-size: 14px; }
.hud { width: 100%; max-width: 260px; display: flex; align-items: center; gap: 10px; }
.hud .mono { color: var(--dim); font-size: 11px; }
.hud .num { font-size: 13px; }
.steps { flex: 1; display: flex; gap: 3px; }
.steps i { flex: 1; height: 8px; border-radius: 2px; background: var(--fill); }
.steps i.off { background: var(--track); }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 12px; margin: 40px 0; }
.card { background: var(--surface); border: .5px solid var(--stroke); border-radius: 18px; padding: 22px; }
.card .mono { color: var(--ink); font-size: 11px; }
.card h3 { font-weight: 500; font-size: 18px; margin: 8px 0 6px; letter-spacing: -.01em; }
.card p { color: var(--dim); margin: 0; font-size: 15px; }
ul.list { padding-left: 1.1em; }
ul.list li { margin: 8px 0; }
ul.list li::marker { color: var(--fill); }
.doc { max-width: 760px; }
.doc h1 { font-weight: 500; font-size: 40px; letter-spacing: -.03em; margin: 30px 0 6px; }
.doc h2 { font-size: 21px; font-weight: 500; margin: 34px 0 8px; letter-spacing: -.01em; }
.doc .meta { color: var(--dim); font-size: 15px; }
footer { border-top: .5px solid var(--stroke); margin-top: 70px; padding: 26px 0 40px; color: var(--dim); font-size: 14px; display: flex; flex-wrap: wrap; gap: 18px; }
footer a { color: var(--dim); }
@media (max-width: 760px) {
  .hero { grid-template-columns: 1fr; gap: 28px; }
  .menu { grid-template-columns: repeat(3, 56px); gap: 12px; }
  .k, .ball { width: 56px; height: 56px; font-size: 20px; }
}