:root {
  --bg: #10261c;
  --panel: #173428;
  --line: rgba(255, 255, 255, .15);
  --text: #f4efe0;
  --mist: #a9c2b3;
  --amber: #ffb347;
  --good: #7fd18b;
  --bad: #ff8d7a;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; min-height: 100vh; min-height: 100dvh; display: flex; flex-direction: column;
  background: var(--bg) radial-gradient(900px 500px at 50% -10%, #23513c 0%, rgba(35, 81, 60, 0) 65%) no-repeat;
  color: var(--text); font: 16px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
header { display: flex; align-items: center; gap: 10px; padding: max(10px, env(safe-area-inset-top)) 16px 8px; width: 100%; max-width: 560px; margin: 0 auto; }
.brand { display: flex; align-items: center; gap: 10px; margin-right: auto; min-width: 0; }
.logo { width: 38px; height: 38px; flex: none; }
h1 { margin: 0; font-size: 19px; letter-spacing: .2em; text-transform: uppercase; }
.brand p { margin: 0; font-size: 11px; letter-spacing: .16em; text-transform: uppercase; color: var(--mist); }
.hud { font-variant-numeric: tabular-nums; white-space: nowrap; color: var(--mist); font-size: 14px; }
.hud b { font-size: 22px; color: var(--amber); }
.round { width: 38px; height: 38px; flex: none; border-radius: 50%; border: 1px solid var(--line); background: rgba(16, 38, 28, .8); color: var(--text); font-size: 17px; cursor: pointer; }
@media (max-width: 360px) { .brand p, .hud span { display: none; } h1 { font-size: 16px; letter-spacing: .12em; } }

#card { width: 100%; max-width: 560px; margin: 0 auto; padding: 14px 16px max(24px, env(safe-area-inset-bottom)); flex: 1; display: flex; flex-direction: column; }
#card > * { animation: rise .38s cubic-bezier(.2, .7, .2, 1) both; }
#card > :nth-child(2) { animation-delay: .05s; }
#card > :nth-child(3) { animation-delay: .1s; }
#card > :nth-child(n+4) { animation-delay: .15s; }
@keyframes rise { from { opacity: 0; transform: translateY(12px); } }
.eyebrow { margin: 0 0 4px; font-size: 12px; letter-spacing: .18em; text-transform: uppercase; color: var(--amber); }
h2 { margin: 0 0 8px; font-size: 26px; line-height: 1.2; text-wrap: balance; }
p { margin: 0 0 10px; }
.muted { color: var(--mist); font-size: 14px; }
.btn {
  display: block; width: 100%; margin-top: 10px; padding: 14px 18px; border: 0; border-radius: 12px;
  background: var(--amber); color: #241500; font: inherit; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; cursor: pointer;
  transition: transform .12s, filter .12s, opacity .2s;
}
.btn:hover { filter: brightness(1.07); }
.btn:active { transform: scale(.97); }
.btn:disabled { opacity: .4; cursor: default; }
.btn.ghost { background: transparent; color: var(--text); border: 1px solid var(--line); }
.btn:focus-visible, .round:focus-visible, .opt:focus-visible, .play:focus-visible, select:focus-visible, textarea:focus-visible { outline: 3px solid #fff; outline-offset: 2px; }
.link { background: none; border: 0; padding: 0; color: var(--mist); font: inherit; font-size: 14px; text-decoration: underline; cursor: pointer; }

/* ---- listening ---- */
.listen { display: grid; place-items: center; margin: 18px 0 8px; position: relative; height: 190px; }
.play {
  position: relative; z-index: 1; width: 124px; height: 124px; border-radius: 50%; border: 0; cursor: pointer;
  background: var(--amber); color: #241500; font-size: 46px; line-height: 1; box-shadow: 0 10px 30px rgba(0, 0, 0, .35);
  transition: transform .15s;
}
.play:active { transform: scale(.95); }
.ring { position: absolute; width: 124px; height: 124px; border-radius: 50%; border: 2px solid var(--amber); opacity: 0; pointer-events: none; }
.listen.on .ring { animation: wave 1.5s ease-out infinite; }
.listen.on .ring:nth-child(2) { animation-delay: .5s; }
.listen.on .ring:nth-child(3) { animation-delay: 1s; }
@keyframes wave { from { transform: scale(1); opacity: .8; } to { transform: scale(1.75); opacity: 0; } }
.bar { height: 6px; border-radius: 99px; background: rgba(255, 255, 255, .13); overflow: hidden; margin: 0 0 6px; }
.bar i { display: block; height: 100%; width: 0; background: var(--amber); border-radius: 99px; }
.stage { display: flex; justify-content: space-between; font-size: 13px; color: var(--mist); margin-bottom: 14px; }
.stage b { color: var(--amber); }

.opts { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.opt {
  display: flex; flex-direction: column; align-items: center; gap: 4px; padding: 14px 8px; min-height: 96px; justify-content: center;
  border: 1px solid var(--line); border-radius: 14px; background: var(--panel); color: var(--text); font: inherit; font-weight: 600; cursor: pointer;
  transition: transform .12s, border-color .15s, background .15s;
}
.opt .e { font-size: 34px; line-height: 1; }
.opt:hover:not(:disabled) { border-color: var(--amber); transform: translateY(-2px); }
.opt:disabled { cursor: default; }
.opt.wrong { opacity: .38; text-decoration: line-through; }
.opt.right { background: #235a3b; border-color: var(--good); }
.opt.shake { animation: shake .3s; }
@keyframes shake { 25% { transform: translateX(-6px); } 75% { transform: translateX(6px); } }
.notice { min-height: 22px; margin: 10px 0 0; font-size: 14px; color: var(--bad); text-align: center; }

.reveal { text-align: center; margin: 10px 0 6px; }
.reveal .e { display: inline-block; font-size: 84px; line-height: 1.1; animation: pop .55s cubic-bezier(.3, 1.6, .5, 1) both; }
@keyframes pop { from { transform: scale(0) rotate(-20deg); opacity: 0; } }
.reveal h2 { margin: 0; }
.gain { text-align: center; font-size: 15px; }
.gain b { color: var(--amber); font-size: 22px; }
.credit { margin: 10px 0 0; font-size: 12px; color: var(--mist); text-align: center; }
.credit a { color: inherit; }

.big { margin: 2px 0; font-size: 46px; font-weight: 800; line-height: 1; font-variant-numeric: tabular-nums; }
.big small { font-size: 18px; font-weight: 600; color: var(--mist); }
.row5 { margin: 8px 0; font-size: 26px; letter-spacing: 4px; }
.row5 span { display: inline-block; animation: pop .45s cubic-bezier(.3, 1.6, .5, 1) both; }
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 10px 0 0; }
.stats div { padding: 9px 6px; border-radius: 12px; background: rgba(255, 255, 255, .07); text-align: center; }
.stats b { display: block; font-size: 19px; font-variant-numeric: tabular-nums; }
.stats span { font-size: 11px; letter-spacing: .1em; text-transform: uppercase; color: var(--mist); }
.log { list-style: none; margin: 12px 0 0; padding: 0; }
.log li { display: grid; grid-template-columns: auto 1fr auto; gap: 12px; padding: 9px 0; border-top: 1px solid var(--line); align-items: center; }
.log .e { font-size: 28px; }
.log .a { font-weight: 600; }
.log .q { font-size: 13px; color: var(--mist); }
.log .p { color: var(--amber); font-weight: 700; font-variant-numeric: tabular-nums; }
.foot { margin-top: auto; padding-top: 18px; text-align: center; }

dialog { width: min(520px, calc(100vw - 32px)); max-height: 86vh; overflow-y: auto; padding: 24px; border: 1px solid var(--line); border-radius: 18px; background: #173428; color: var(--text); }
dialog::backdrop { background: rgba(5, 14, 10, .75); }
dialog h2 { font-size: 17px; letter-spacing: .12em; text-transform: uppercase; color: var(--amber); margin-top: 6px; }
dialog ul { padding-left: 20px; margin: 0 0 16px; }
dialog li { margin-bottom: 8px; }
dialog p { color: var(--mist); font-size: 14px; }
dialog .more { margin: 14px 0 0; text-align: center; }
#creditList { font-size: 13px; color: var(--mist); }
#creditList a { color: var(--text); }
#feedback label { display: block; margin: 12px 0 6px; font-size: 12px; letter-spacing: .12em; text-transform: uppercase; color: var(--mist); }
#feedback select, #feedback textarea { width: 100%; padding: 12px; border-radius: 12px; border: 1px solid var(--line); background: #1d4433; color: var(--text); font: inherit; resize: vertical; }
#feedback .fine { margin: 10px 0 0; font-size: 13px; }
.status { min-height: 20px; margin: 8px 0 0; font-size: 14px; color: var(--bad); }
.status.ok { color: var(--good); }
.petal { position: fixed; z-index: 9; width: 9px; height: 9px; border-radius: 2px; pointer-events: none; }

@media (prefers-reduced-motion: reduce) {
  #card > *, .reveal .e, .row5 span, .listen.on .ring, .opt.shake { animation: none; }
}