:root {
  --bg: #06070b;
  --panel: #0c0f17;
  --panel-2: #121725;
  --line: #1a2030;
  --line-2: #283149;
  --text: #eceef5;
  --muted: #8a92a8;
  --caller: #b69cff;
  --you: #6fe6ff;
  --perfect: #7dffb2;
  --good: #ffd166;
  --off: #ff9f5a;
  --miss: #ff5f6d;
  --radius: 14px;
  --mono: ui-monospace, "SFMono-Regular", "Cascadia Code", Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  background:
    radial-gradient(800px 480px at 8% -10%, rgba(182, 156, 255, 0.07), transparent 60%),
    radial-gradient(800px 480px at 105% 110%, rgba(111, 230, 255, 0.06), transparent 60%),
    var(--bg);
  color: var(--text);
  font: 15px/1.5 var(--sans);
  -webkit-font-smoothing: antialiased;
}
.mono { font-family: var(--mono); font-variant-numeric: tabular-nums; }
[hidden] { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.app { max-width: 1040px; margin: 0 auto; padding: 20px 16px 28px; display: flex; flex-direction: column; gap: 14px; }

/* header */
.top { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 14px; }
.mark {
  width: 38px; height: 38px; border-radius: 10px; flex: none; position: relative;
  background: #000; border: 1px solid var(--line-2); overflow: hidden;
  box-shadow: 0 0 24px rgba(182, 156, 255, 0.18);
}
.mark i { position: absolute; top: 9px; bottom: 9px; width: 9px; border-radius: 6px; }
.mark i:first-child { left: 8px; background: var(--caller); }
.mark i:last-child { right: 8px; background: var(--you); top: 14px; }
h1 { margin: 0; font-size: 22px; letter-spacing: -0.01em; }
.sub { margin: 2px 0 0; color: var(--muted); font-size: 13px; }

.hud { display: flex; gap: 6px; flex-wrap: wrap; }
.stat {
  display: flex; flex-direction: column; gap: 1px;
  background: var(--panel); border: 1px solid var(--line); border-radius: 10px;
  padding: 6px 12px; min-width: 82px;
}
.label { font-size: 10px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); }
.val { font-size: 15px; font-weight: 600; }

/* stage */
.stage {
  position: relative; overflow: hidden; isolation: isolate;
  height: min(640px, 78vh); min-height: 520px; border-radius: var(--radius);
  border: 1px solid var(--line-2); background: #04050a;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.04);
  touch-action: manipulation; user-select: none; -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
}
#view { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }

/* overlays */
.overlay {
  position: absolute; inset: 0; z-index: 5;
  display: flex; align-items: center; justify-content: center; padding: 16px;
  background: rgba(4, 5, 10, 0.72);
  backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px);
  overflow-y: auto;
  animation: fade 0.18s ease-out;
}
@keyframes fade { from { opacity: 0; } }
.card {
  width: 100%; max-width: 520px; margin: auto;
  background: linear-gradient(180deg, var(--panel-2), var(--panel));
  border: 1px solid var(--line-2); border-radius: var(--radius);
  padding: 22px 22px 20px;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.55);
}
.card--wide { max-width: 780px; }
.kicker { margin: 0 0 4px; font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--caller); }
.card h2 { margin: 0 0 8px; font-size: 26px; letter-spacing: -0.015em; }
.lede { margin: 0 0 14px; color: #c4c9d8; }
.note { margin: 12px 0 0; color: var(--muted); font-size: 13px; }
.row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; margin-top: 14px; }

.btn {
  font: inherit; font-size: 14px; color: var(--text); cursor: pointer;
  background: var(--panel-2); border: 1px solid var(--line-2); border-radius: 10px;
  padding: 9px 14px; display: inline-flex; align-items: center; gap: 8px;
  transition: border-color 0.15s, background 0.15s, transform 0.08s;
}
.btn:hover { border-color: #3a4566; background: #171d2e; }
.btn:active { transform: translateY(1px); }
.btn:focus-visible { outline: 2px solid var(--you); outline-offset: 2px; }
.btn:disabled { opacity: 0.45; cursor: default; }
.btn.primary { background: linear-gradient(180deg, #7ee9ff, #4fcbe6); color: #031018; border-color: transparent; font-weight: 600; }
.btn.primary:hover { background: linear-gradient(180deg, #98eeff, #63d3ea); }
.btn.small { padding: 6px 10px; font-size: 13px; }
kbd {
  font-family: var(--mono); font-size: 11px; padding: 1px 6px; border-radius: 5px;
  background: rgba(255, 255, 255, 0.08); border: 1px solid rgba(255, 255, 255, 0.14);
}
.btn.primary kbd { background: rgba(0, 0, 0, 0.12); border-color: rgba(0, 0, 0, 0.18); }

/* track picker */
.tracks { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.trk {
  text-align: left; font: inherit; color: var(--text); cursor: pointer;
  background: #0a0d15; border: 1px solid var(--line-2); border-radius: 12px; padding: 12px 12px 11px;
  display: flex; flex-direction: column; gap: 6px; position: relative;
  transition: border-color 0.15s, background 0.15s;
}
.trk:hover { border-color: #3a4566; }
.trk:focus-visible { outline: 2px solid var(--you); outline-offset: 2px; }
.trk[aria-checked="true"] { border-color: var(--you); background: linear-gradient(180deg, rgba(111, 230, 255, 0.08), #0a0d15 70%); }
.trk__top { display: flex; align-items: baseline; justify-content: space-between; gap: 6px; }
.trk__name { font-weight: 700; font-size: 17px; }
.trk__tier { font-size: 11px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; padding: 1px 7px; border-radius: 99px; }
.tier-easy { color: var(--perfect); background: rgba(125, 255, 178, 0.1); }
.tier-normal { color: var(--good); background: rgba(255, 209, 102, 0.1); }
.tier-hard { color: var(--miss); background: rgba(255, 95, 109, 0.12); }
.trk__meta { font-family: var(--mono); font-size: 12px; color: var(--muted); }
.trk__ghost { font-size: 12px; color: var(--muted); }
.trk__ghost b { color: var(--caller); font-weight: 600; }
.trk__blurb { font-size: 13px; color: #b7bdcc; line-height: 1.4; }
.trk__best { font-size: 12px; color: var(--muted); margin-top: auto; }
.trk__best b { color: var(--text); }
.trk__key { position: absolute; top: 10px; right: 10px; display: none; }

.seedrow { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-top: 12px; font-size: 13px; }
.seed { color: var(--text); }
.seednote { color: var(--muted); }
.calibnote { color: var(--muted); font-size: 13px; }

/* calibration */
.calmeter {
  position: relative; height: 54px; margin: 6px 0 10px; border-radius: 10px;
  background: #090c14; border: 1px solid var(--line-2); overflow: hidden;
}
.calmeter__zone { position: absolute; top: 0; bottom: 0; left: 42%; right: 42%; background: rgba(125, 255, 178, 0.08); }
.calmeter__mid { position: absolute; top: 0; bottom: 0; left: 50%; width: 2px; margin-left: -1px; background: var(--perfect); opacity: 0.7; }
.calmeter__lab { position: absolute; bottom: 4px; font-size: 10px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.08em; }
.calmeter__lab--l { left: 8px; } .calmeter__lab--r { right: 8px; }
#calDots i {
  position: absolute; top: 12px; width: 4px; height: 22px; margin-left: -2px; border-radius: 2px;
  background: var(--you); box-shadow: 0 0 10px var(--you);
}
#calDots i.wild { background: var(--miss); box-shadow: none; opacity: 0.6; }
.calpulse {
  width: 64px; height: 64px; margin: 4px auto 6px; border-radius: 50%;
  border: 2px solid var(--line-2); display: grid; place-items: center;
  font: 600 18px var(--mono); color: var(--muted);
}
.calpulse.on { animation: pulse 0.22s ease-out; }
.calpulse.on--lead { border-color: var(--caller); color: var(--caller); }
.calpulse.on--go { border-color: var(--you); color: var(--you); }
@keyframes pulse { from { transform: scale(1.18); box-shadow: 0 0 24px currentColor; } }
.calresult { min-height: 22px; margin: 0; text-align: center; color: #c4c9d8; }

/* results */
.result__head { display: flex; gap: 18px; align-items: center; }
.grade {
  flex: none; width: 92px; height: 92px; border-radius: 18px;
  display: grid; place-items: center; font: 800 54px/1 var(--sans);
  background: #090c14; border: 1px solid var(--line-2);
  color: var(--g, var(--you)); text-shadow: 0 0 26px var(--g, var(--you));
  animation: pop 0.5s cubic-bezier(.2, 1.6, .4, 1);
}
@keyframes pop { from { transform: scale(0.4); opacity: 0; } }
.tally { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin: 16px 0 12px; }
.tally div { background: #090c14; border: 1px solid var(--line); border-radius: 10px; padding: 8px 10px; }
.tally dt { font-size: 10px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); }
.tally dd { margin: 2px 0 0; font: 600 18px var(--mono); }
.result__grid { display: grid; grid-template-columns: 1.15fr 1fr; gap: 10px; }
.panel { margin: 0; background: #090c14; border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px; min-width: 0; }
.panel figcaption { display: flex; justify-content: space-between; gap: 8px; align-items: baseline; font-size: 12px; color: #c4c9d8; margin-bottom: 6px; }
#histo { width: 100%; height: auto; display: block; }
.histo__axis { display: flex; justify-content: space-between; font-size: 10px; color: var(--muted); margin-top: 4px; }
.phr { list-style: none; margin: 4px 0 0; padding: 0; display: grid; grid-template-columns: repeat(7, 1fr); gap: 5px; }
.phr li {
  height: 34px; border-radius: 7px; position: relative;
  display: grid; place-items: center; font: 600 11px var(--mono); color: rgba(0, 0, 0, 0.7);
}
.phr li.echo { background: var(--perfect); }
.phr li.part { background: var(--good); }
.phr li.lost { background: var(--miss); }
.legend { margin: 8px 0 0; font-size: 11px; color: var(--muted); display: flex; flex-wrap: wrap; gap: 4px 10px; align-items: center; }
.legend span { white-space: nowrap; }
.sw { display: inline-block; width: 9px; height: 9px; border-radius: 3px; margin-right: 4px; vertical-align: -1px; }
.sw--echo { background: var(--perfect); } .sw--part { background: var(--good); } .sw--lost { background: var(--miss); }

/* footer bar */
.bar { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.hint { margin: 0; color: var(--muted); font-size: 13px; }
.actions { display: flex; gap: 6px; }

@media (max-width: 760px) {
  .tracks { grid-template-columns: 1fr; gap: 8px; }
  .trk { padding: 10px 12px; gap: 3px; }
  .trk__ghost { font-size: 12px; color: var(--muted); }
.trk__ghost b { color: var(--caller); font-weight: 600; }
.trk__blurb { display: none; }
  .lede { font-size: 14px; }
  .result__grid { grid-template-columns: 1fr; }
  .stage { height: 76vh; min-height: 480px; }
  .hud .stat { min-width: 70px; padding: 5px 9px; }
  .card { padding: 18px 16px; }
  .result__head { gap: 12px; }
  .grade { width: 70px; height: 70px; font-size: 40px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001s !important; transition-duration: 0.001s !important; }
}