:root {
  --bg: #11151a; --panel: rgba(17, 21, 27, .74); --line: rgba(255, 255, 255, .13);
  --text: #eef2f6; --mut: #9aa6b2; --accent: #ffb81c; --accent2: #ff7a1a; --good: #4ade80; --bad: #ff5d5d; --blue: #5eb4ff;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; overflow: hidden; background: var(--bg); color: var(--text); user-select: none; -webkit-user-select: none; }
canvas#c { position: fixed; inset: 0; width: 100%; height: 100%; display: block; touch-action: none; outline: none; }
[hidden] { display: none !important; }
button { font: inherit; color: inherit; cursor: pointer; }
b { font-weight: 650; }

.hud { position: fixed; inset: 0; pointer-events: none; z-index: 5; }
.hud .panel, .hud button, .hud input, .hud .pointer { pointer-events: auto; }
.panel { background: var(--panel); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border: 1px solid var(--line); border-radius: 14px; padding: 10px 14px; }
.panel h3 { margin: 0 0 8px; font-size: 11px; letter-spacing: .12em; text-transform: uppercase; color: var(--mut); font-weight: 600; }

.topbar { position: absolute; top: 10px; left: 10px; right: 10px; display: flex; align-items: center; gap: 12px; padding: 8px 12px; }
.brand { display: flex; align-items: center; gap: 10px; min-width: 0; }
.brand .logo { width: 36px; height: 36px; border-radius: 10px; display: grid; place-items: center; font-size: 21px; background: linear-gradient(135deg, var(--accent), var(--accent2)); color: #1b1305; flex: none; }
.brand b { display: block; font-size: 15px; letter-spacing: .02em; white-space: nowrap; }
.brand small { color: var(--mut); font-size: 11px; white-space: nowrap; }
.chips { display: flex; gap: 8px; margin: 0 auto; flex-wrap: wrap; justify-content: center; }
.chip { min-width: 74px; padding: 4px 12px; border-radius: 10px; background: rgba(255, 255, 255, .06); text-align: center; }
.chip small { display: block; color: var(--mut); font-size: 10px; text-transform: uppercase; letter-spacing: .08em; }
.chip b { font-size: 17px; font-variant-numeric: tabular-nums; }
.btns { display: flex; gap: 6px; }
.btn { border: 1px solid var(--line); background: rgba(255, 255, 255, .07); border-radius: 10px; padding: 7px 12px; font-size: 13px; transition: background .15s, transform .1s; white-space: nowrap; }
.btn:hover { background: rgba(255, 255, 255, .15); }
.btn:active { transform: scale(.96); }
.btn.on { background: linear-gradient(135deg, var(--accent), var(--accent2)); color: #1b1305; border-color: transparent; font-weight: 650; }
.btn.primary, button.primary { background: linear-gradient(135deg, var(--accent), var(--accent2)); color: #1b1305; border: none; font-weight: 700; padding: 12px 28px; border-radius: 12px; font-size: 16px; box-shadow: 0 6px 24px rgba(255, 150, 20, .35); }
button.primary:hover { filter: brightness(1.08); }

.overlay { position: fixed; inset: 0; z-index: 20; display: grid; place-items: center; background: radial-gradient(circle at 50% 40%, rgba(8, 12, 18, .55), rgba(8, 12, 18, .88)); backdrop-filter: blur(4px); padding: 16px; overflow: auto; }
.card { width: min(640px, 100%); text-align: center; background: rgba(20, 25, 32, .9); border: 1px solid var(--line); border-radius: 22px; padding: 28px 30px; box-shadow: 0 30px 80px rgba(0, 0, 0, .5); }
.card h1 { margin: 6px 0 2px; font-size: 34px; letter-spacing: .01em; }
.card h2 { margin: 6px 0; }
.card .sub { color: var(--accent); font-weight: 600; margin: 0 0 14px; }
.card p { color: #cdd5dd; line-height: 1.5; font-size: 14.5px; }
.card .hint { color: var(--mut); font-size: 12.5px; }
.card .logo.big { width: 66px; height: 66px; font-size: 38px; margin: 0 auto 6px; border-radius: 18px; display: grid; place-items: center; background: linear-gradient(135deg, var(--accent), var(--accent2)); color: #1b1305; }
.keys { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 6px 14px; text-align: left; margin: 14px 0 18px; font-size: 13px; color: #cdd5dd; }
.keys span { white-space: normal; }
kbd { display: inline-block; min-width: 22px; padding: 1px 6px; text-align: center; border-radius: 6px; border: 1px solid rgba(255, 255, 255, .25); border-bottom-width: 2px; background: rgba(255, 255, 255, .08); font: 600 12px ui-monospace, monospace; color: #fff; margin-right: 2px; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 10px; margin: 14px 0 20px; }
.grid div { background: rgba(255, 255, 255, .06); border-radius: 12px; padding: 10px; }
.grid small { display: block; color: var(--mut); font-size: 11px; text-transform: uppercase; letter-spacing: .07em; }
.grid b { font-size: 22px; font-variant-numeric: tabular-nums; }

.bar { height: 8px; border-radius: 6px; background: rgba(255, 255, 255, .1); overflow: hidden; }
.bar i { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--good), var(--accent)); border-radius: 6px; transition: width .2s; }

input[type=range] { -webkit-appearance: none; appearance: none; width: 100%; height: 6px; border-radius: 6px; background: rgba(255, 255, 255, .16); outline: none; }
input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; width: 16px; height: 16px; border-radius: 50%; background: var(--accent); border: 2px solid #1b1305; cursor: pointer; }
input[type=range]::-moz-range-thumb { width: 14px; height: 14px; border-radius: 50%; background: var(--accent); border: 2px solid #1b1305; cursor: pointer; }
label.row { display: block; font-size: 12px; color: var(--mut); margin: 8px 0 4px; }
label.row span { float: right; color: var(--text); font-variant-numeric: tabular-nums; }

#toast { position: absolute; left: 50%; top: 84px; transform: translate(-50%, -10px); padding: 9px 18px; border-radius: 12px; background: rgba(17, 21, 27, .88); border: 1px solid var(--line); opacity: 0; transition: opacity .25s, transform .25s; font-size: 14px; text-align: center; max-width: 90vw; }
#toast.show { opacity: 1; transform: translate(-50%, 0); }
#toast.good { border-color: var(--good); } #toast.bad { border-color: var(--bad); } #toast.warn { border-color: var(--accent); }

@media (max-width: 760px) {
  .brand small { display: none; } .topbar { flex-wrap: wrap; gap: 6px; } .chips { margin: 0; } .chip { min-width: 58px; padding: 3px 8px; } .chip b { font-size: 14px; }
  .card { padding: 20px 16px; } .card h1 { font-size: 26px; }
}