:root {
  color-scheme: dark;
  --bg: #080b15;
  --surface: rgba(18, 24, 43, 0.72);
  --line: rgba(255, 255, 255, 0.1);
  --muted: #8a94ad;
  --text: #f3f6ff;
  --cyan: #53e6ff;
  --violet: #a88bff;
  --green: #66f0bd;
  --red: #ff7291;
}

* { box-sizing: border-box; }

body {
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  background:
    linear-gradient(rgba(255,255,255,.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.018) 1px, transparent 1px),
    var(--bg);
  background-size: 42px 42px;
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button { font: inherit; }
button:focus-visible { outline: 2px solid var(--cyan); outline-offset: 4px; }
.hidden { display: none !important; }

.ambient {
  position: fixed;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  filter: blur(120px);
  opacity: .13;
  pointer-events: none;
}
.ambient-one { background: var(--cyan); top: -160px; left: -120px; }
.ambient-two { background: var(--violet); right: -160px; bottom: -160px; }

.shell { width: min(100% - 36px, 920px); margin: 0 auto; }
.topbar { height: 88px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); }
.brand { color: var(--text); text-decoration: none; display: flex; align-items: center; gap: 12px; font: 500 13px ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .14em; }
.brand-mark { display: grid; place-items: center; width: 33px; height: 33px; border: 1px solid var(--cyan); color: var(--cyan); transform: rotate(45deg); box-shadow: 0 0 20px rgba(83,230,255,.2); }
.brand-mark::first-letter { transform: rotate(-45deg); }
.topbar-actions { display: flex; align-items: center; gap: 12px; }
.daily-timer { display: flex; align-items: center; gap: 9px; height: 39px; padding: 0 13px; border: 1px solid var(--line); border-radius: 999px; background: rgba(255,255,255,.025); }
.daily-timer span { color: var(--muted); font: 500 8px DM Mono, monospace; letter-spacing: .14em; }
.daily-timer strong { min-width: 61px; color: var(--green); font: 500 11px DM Mono, monospace; letter-spacing: .04em; font-variant-numeric: tabular-nums; }
.icon-button { width: 39px; height: 39px; border-radius: 50%; border: 1px solid var(--line); background: rgba(255,255,255,.03); color: var(--cyan); cursor: pointer; }

.hero { padding: 72px 0 50px; text-align: center; }
.eyebrow { margin: 0 0 18px; color: var(--cyan); font: 500 11px DM Mono, monospace; letter-spacing: .23em; }
h1 { margin: 0; font-size: clamp(42px, 7vw, 72px); line-height: .98; letter-spacing: -.055em; }
h1 span { color: transparent; -webkit-text-stroke: 1px rgba(243,246,255,.5); }
.intro { max-width: 570px; margin: 28px auto 38px; color: var(--muted); font-size: 16px; line-height: 1.75; }
.intro strong { color: var(--text); }

.setup-card { max-width: 630px; margin: auto; padding: 28px; border: 1px solid var(--line); border-radius: 18px; background: var(--surface); backdrop-filter: blur(18px); box-shadow: 0 28px 80px rgba(0,0,0,.28); }
.field-label { display: block; margin-bottom: 12px; color: var(--muted); text-align: left; font: 500 10px DM Mono, monospace; letter-spacing: .17em; }
.mode-picker { margin-bottom: 22px; }
.segmented { display: grid; grid-template-columns: repeat(4, 1fr); gap: 7px; }
.mode-options { grid-template-columns: 1fr 1fr; }
.segmented button { padding: 13px 5px; border: 1px solid var(--line); border-radius: 8px; background: rgba(255,255,255,.025); color: var(--muted); font: 500 11px DM Mono, monospace; cursor: pointer; transition: .2s; }
.segmented button:hover { color: var(--text); border-color: rgba(83,230,255,.35); }
.segmented button.active { color: #071015; border-color: var(--cyan); background: var(--cyan); box-shadow: 0 0 24px rgba(83,230,255,.18); }
.pace-picker { margin-top: 22px; }
.pace-heading { display: flex; align-items: center; justify-content: space-between; }
.pace-heading output { color: var(--cyan); font: 500 11px DM Mono, monospace; letter-spacing: .1em; }
.pace-picker input { width: 100%; height: 4px; margin: 8px 0 6px; appearance: none; border-radius: 999px; background: linear-gradient(90deg, var(--cyan) var(--pace-progress, 40%), var(--line) 0); cursor: pointer; }
.pace-picker input::-webkit-slider-thumb { width: 18px; height: 18px; appearance: none; border: 3px solid #0e1424; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 15px rgba(83,230,255,.45); }
.pace-picker input::-moz-range-thumb { width: 13px; height: 13px; border: 3px solid #0e1424; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 15px rgba(83,230,255,.45); }
.pace-scale { display: flex; justify-content: space-between; color: #59637a; font: 500 8px DM Mono, monospace; letter-spacing: .12em; }
.session-facts { display: grid; grid-template-columns: repeat(3, 1fr); margin: 27px 0; border-block: 1px solid var(--line); }
.session-facts div { padding: 19px 10px; display: flex; flex-direction: column; gap: 5px; }
.session-facts div + div { border-left: 1px solid var(--line); }
.session-facts strong { font-size: 20px; }
.session-facts span, .result-grid span { color: var(--muted); font: 500 9px DM Mono, monospace; letter-spacing: .13em; }
.primary-button, .secondary-button, .match-button { border-radius: 8px; cursor: pointer; font: 700 12px DM Mono, monospace; letter-spacing: .1em; }
.primary-button { width: 100%; padding: 17px 20px; border: 0; background: linear-gradient(105deg, var(--cyan), #8ff4dd); color: #061015; box-shadow: 0 10px 34px rgba(83,230,255,.16); }
.primary-button span { float: right; font-size: 17px; line-height: 12px; }
.key-hint { margin: 14px 0 0; color: #657089; font: 400 10px DM Mono, monospace; }
kbd { padding: 2px 6px; border: 1px solid var(--line); border-radius: 4px; color: var(--muted); background: rgba(255,255,255,.04); }
.history-card { max-width: 630px; margin: 16px auto 0; padding: 22px 24px; border: 1px solid var(--line); border-radius: 14px; background: rgba(13,18,32,.62); text-align: left; }
.history-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 20px; }
.history-heading .field-label { margin: 0 0 6px; }
.history-heading strong { color: var(--text); font: 500 12px DM Mono, monospace; letter-spacing: .08em; }
.history-heading > span { color: var(--muted); font: 500 8px DM Mono, monospace; letter-spacing: .12em; }
.history-empty { padding: 24px 0 6px; color: var(--muted); text-align: center; font-size: 12px; }
.history-stats { display: grid; grid-template-columns: repeat(3, 1fr); margin: 20px 0; border-block: 1px solid var(--line); }
.history-stats div { display: flex; flex-direction: column; gap: 6px; padding: 14px 8px; }
.history-stats div + div { border-left: 1px solid var(--line); }
.history-stats span { color: var(--muted); font: 500 8px DM Mono, monospace; letter-spacing: .11em; }
.history-stats strong { font-size: 16px; }
.history-chart { display: flex; align-items: end; gap: 7px; height: 86px; padding-top: 8px; }
.history-bar { position: relative; flex: 1; min-height: 5px; padding: 0; border: 0; border-radius: 4px 4px 2px 2px; background: linear-gradient(180deg, var(--cyan), rgba(83,230,255,.22)); box-shadow: 0 0 12px rgba(83,230,255,.08); cursor: pointer; }
.history-bar.latest { background: linear-gradient(180deg, var(--green), rgba(102,240,189,.25)); }
.history-bar::after { content: attr(data-value); position: absolute; left: 50%; top: -16px; transform: translateX(-50%); color: var(--muted); font: 500 8px DM Mono, monospace; }
.chart-scale { display: flex; justify-content: space-between; margin-top: 6px; color: #59637a; font: 500 7px DM Mono, monospace; letter-spacing: .12em; }
.history-session-detail { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 12px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 7px; background: rgba(255,255,255,.02); }
.history-session-detail strong { font: 500 9px DM Mono, monospace; letter-spacing: .06em; }
.history-session-detail span { color: var(--muted); text-align: right; font: 500 8px DM Mono, monospace; letter-spacing: .05em; }
.history-record { margin-top: 10px; padding: 12px; border: 1px solid var(--line); border-radius: 7px; background: rgba(255,255,255,.015); }
.history-record-heading { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.history-record-heading span, .history-record-heading strong { font: 500 8px DM Mono, monospace; letter-spacing: .08em; }
.history-record-heading span { color: var(--muted); }
.history-record-heading strong { color: var(--text); text-align: right; }
.history-record-list { display: grid; gap: 6px; max-height: 270px; margin-top: 10px; overflow-y: auto; }
.history-record-list .trial-issue { padding: 9px 10px; }
.last-session { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-top: 18px; padding-top: 17px; border-top: 1px solid var(--line); }
.last-session > div { display: flex; flex-direction: column; gap: 5px; }
.last-session > div span { color: var(--muted); font: 500 8px DM Mono, monospace; letter-spacing: .12em; }
.last-session > div strong { font: 500 11px DM Mono, monospace; }
.replay-button { flex: 0 0 auto; padding: 10px 13px; border: 1px solid var(--violet); border-radius: 7px; background: rgba(168,139,255,.07); color: var(--violet); font: 700 9px DM Mono, monospace; letter-spacing: .08em; cursor: pointer; }
.replay-button span { margin-left: 7px; }
.data-transfer { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-top: 18px; padding-top: 17px; border-top: 1px solid var(--line); }
.data-transfer > div:first-child { display: flex; flex-direction: column; gap: 5px; }
.data-transfer > div:first-child span { color: var(--muted); font: 500 8px DM Mono, monospace; letter-spacing: .12em; }
.data-transfer > div:first-child strong { font-size: 11px; }
.data-actions { display: grid; grid-template-columns: repeat(3, minmax(92px, 1fr)); gap: 7px; }
.data-actions button { width: 100%; min-height: 31px; padding: 9px 12px; border: 1px solid var(--line); border-radius: 6px; background: rgba(255,255,255,.025); color: var(--text); font: 700 8px DM Mono, monospace; letter-spacing: .1em; cursor: pointer; }
.data-actions button:hover { border-color: var(--cyan); color: var(--cyan); }
.data-actions .danger-button { border-color: rgba(255,114,145,.3); color: var(--red); }
.data-actions .danger-button:hover { border-color: var(--red); color: #ff9caf; }
.data-status { min-height: 14px; margin: 8px 0 0; color: var(--muted); text-align: right; font-size: 9px; }

.game-panel { max-width: 650px; margin: auto; padding: 54px 0 40px; text-align: center; }
.game-meta { display: grid; grid-template-columns: 1fr 2fr 1fr; align-items: end; margin-bottom: 34px; text-align: left; }
.game-meta > div { display: flex; flex-direction: column; gap: 6px; }
.game-meta span { color: var(--muted); font: 500 9px DM Mono, monospace; letter-spacing: .15em; }
.game-meta strong { display: inline-block; font: 500 14px DM Mono, monospace; color: var(--cyan); }
.game-meta .score-live { position: relative; text-align: right; }
.score-live strong.bump { animation: score-bump .35s ease; }
.score-live em { position: absolute; right: 0; bottom: -16px; color: var(--green); font: 500 9px DM Mono, monospace; font-style: normal; opacity: 0; }
.score-live em.show { animation: score-gain .7s ease; }
@keyframes score-bump { 50% { color: var(--green); transform: scale(1.18); } }
@keyframes score-gain { 0% { opacity: 0; transform: translateY(4px); } 25%,70% { opacity: 1; transform: translateY(0); } 100% { opacity: 0; transform: translateY(-5px); } }
.progress-wrap { padding: 0 24px; text-align: center; }
.progress-track { height: 3px; background: var(--line); }
.progress-track div { width: 0; height: 100%; background: var(--cyan); box-shadow: 0 0 10px var(--cyan); transition: width .2s; }
.grid-wrap { position: relative; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; aspect-ratio: 1; padding: 11px; border: 1px solid var(--line); border-radius: 16px; background: rgba(255,255,255,.018); }
.grid div { border: 1px solid rgba(255,255,255,.075); border-radius: 10px; background: rgba(255,255,255,.025); transition: background .12s, transform .12s, box-shadow .12s; }
.grid div.active { background: radial-gradient(circle at 45% 40%, #c8fbff, var(--cyan) 38%, #1597b7 100%); transform: scale(.94); box-shadow: inset 0 0 22px rgba(255,255,255,.35), 0 0 34px rgba(83,230,255,.35); }
.feedback { position: absolute; inset: 0; display: grid; place-items: center; pointer-events: none; font: 800 22px DM Mono, monospace; letter-spacing: .12em; opacity: 0; }
.feedback.show { animation: feedback .55s ease; }
.feedback.correct { color: var(--green); }
.feedback.wrong { color: var(--red); }
@keyframes feedback { 0%,100% { opacity: 0; transform: scale(.9); } 30%,70% { opacity: 1; transform: scale(1); } }
.match-controls { display: grid; grid-template-columns: 1fr; gap: 10px; margin: 26px auto 0; }
.match-controls.dual { grid-template-columns: repeat(3, 1fr); }
.match-button { width: 100%; margin: 0; padding: 17px; border: 1px solid var(--cyan); color: var(--cyan); background: rgba(83,230,255,.06); }
.match-button.sound-match { color: var(--violet); border-color: var(--violet); background: rgba(168,139,255,.06); }
.match-button.both-match { color: var(--green); border-color: var(--green); background: rgba(102,240,189,.06); }
.match-button:active { transform: translateY(2px); background: rgba(83,230,255,.14); }
.match-button span { float: right; color: var(--muted); font-size: 9px; }
.game-instruction { color: var(--muted); font-size: 12px; }
.audio-cue { display: flex; align-items: center; justify-content: center; gap: 12px; height: 20px; margin-top: 17px; color: var(--violet); font: 500 9px DM Mono, monospace; letter-spacing: .14em; opacity: .55; }
.audio-cue.playing { opacity: 1; }
.sound-wave { height: 16px; display: flex; align-items: center; gap: 3px; }
.sound-wave i { display: block; width: 2px; height: 5px; border-radius: 3px; background: var(--violet); }
.audio-cue.playing .sound-wave i { animation: wave .55s ease-in-out infinite alternate; }
.audio-cue.playing .sound-wave i:nth-child(2), .audio-cue.playing .sound-wave i:nth-child(4) { animation-delay: -.3s; }
.audio-cue.playing .sound-wave i:nth-child(3) { animation-delay: -.15s; }
@keyframes wave { to { height: 16px; } }

.results-panel { max-width: 650px; margin: auto; padding: 60px 0 45px; text-align: center; }
h2 { margin: 0 0 28px; font-size: clamp(34px, 6vw, 52px); letter-spacing: -.04em; }
.score-ring { --score: 0deg; display: grid; place-items: center; width: 165px; aspect-ratio: 1; margin: 0 auto 34px; border-radius: 50%; background: conic-gradient(var(--cyan) var(--score), rgba(255,255,255,.08) 0); }
.score-ring::before { content: ''; grid-area: 1/1; width: 145px; aspect-ratio: 1; border-radius: 50%; background: #0d1220; }
.score-ring div { grid-area: 1/1; z-index: 1; display: flex; flex-direction: column; }
.score-ring strong { font-size: 43px; letter-spacing: -.05em; }
.score-ring span { color: var(--muted); font: 500 9px DM Mono, monospace; letter-spacing: .15em; }
.result-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; overflow: hidden; border: 1px solid var(--line); border-radius: 12px; background: var(--line); }
.result-grid div { padding: 18px 7px; display: flex; flex-direction: column-reverse; gap: 8px; background: #111729; }
.result-grid strong { font-size: 18px; }
.result-breakdown { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 10px; }
.result-breakdown div { display: flex; justify-content: space-between; align-items: center; padding: 13px 16px; border: 1px solid var(--line); border-radius: 8px; background: rgba(255,255,255,.02); }
.result-breakdown span { color: var(--muted); font: 500 9px DM Mono, monospace; letter-spacing: .13em; }
.result-breakdown strong { color: var(--violet); font: 500 13px DM Mono, monospace; }
.improvement-card { display: flex; align-items: center; gap: 14px; margin-top: 14px; padding: 15px 17px; border: 1px solid var(--line); border-radius: 10px; background: rgba(255,255,255,.025); text-align: left; }
.trend-icon { display: grid; place-items: center; flex: 0 0 34px; height: 34px; border-radius: 50%; background: rgba(83,230,255,.1); color: var(--cyan); font-size: 18px; }
.improvement-card.improved .trend-icon { color: var(--green); background: rgba(102,240,189,.1); }
.improvement-card.declined .trend-icon { color: var(--red); background: rgba(255,114,145,.1); }
.improvement-card strong { font-size: 13px; }
.improvement-card p { margin: 3px 0 0; color: var(--muted); font-size: 11px; line-height: 1.4; }
.trial-review { margin-top: 14px; padding: 17px; border: 1px solid var(--line); border-radius: 10px; background: rgba(13,18,32,.7); text-align: left; }
.trial-review-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 14px; }
.trial-review-heading > div { display: flex; flex-direction: column; gap: 4px; }
.trial-review-heading span { color: var(--muted); font: 500 8px DM Mono, monospace; letter-spacing: .12em; }
.trial-review-heading strong { font-size: 13px; }
.trial-review-list { display: grid; gap: 7px; max-height: 245px; margin-top: 14px; overflow-y: auto; }
.trial-issue { display: grid; grid-template-columns: 42px 1fr auto; align-items: center; gap: 11px; padding: 11px 12px; border-radius: 7px; background: rgba(255,255,255,.025); }
.trial-number { display: grid; place-items: center; height: 28px; border-radius: 5px; background: rgba(255,114,145,.1); color: var(--red); font: 500 9px DM Mono, monospace; }
.trial-issue.correct .trial-number { color: var(--green); background: rgba(102,240,189,.1); }
.trial-issue-main { display: flex; flex-direction: column; gap: 3px; }
.trial-issue-main strong { font-size: 11px; }
.trial-issue-main span { color: var(--muted); font-size: 10px; }
.issue-type { color: var(--red); font: 500 8px DM Mono, monospace; letter-spacing: .08em; }
.trial-issue.correct .issue-type { color: var(--green); }
.trial-outcome { display: flex; align-items: flex-end; flex-direction: column; gap: 4px; }
.trial-speed { color: var(--muted); font: 500 8px DM Mono, monospace; font-variant-numeric: tabular-nums; }
.trial-perfect { padding: 17px; border-radius: 7px; background: rgba(102,240,189,.07); color: var(--green); text-align: center; font-size: 12px; }
.trial-record-empty { margin: 0; padding: 13px; border-radius: 7px; background: rgba(255,255,255,.025); color: var(--muted); text-align: center; font-size: 10px; line-height: 1.5; }
.recommendation { min-height: 24px; margin: 24px 0; color: var(--muted); font-size: 14px; }
.result-actions { display: grid; grid-template-columns: 1.5fr 1fr; gap: 10px; }
.secondary-button { padding: 16px; border: 1px solid var(--line); background: transparent; color: var(--text); }

footer { padding: 26px; text-align: center; color: #4f5870; font: 400 9px DM Mono, monospace; letter-spacing: .09em; }

@media (max-width: 580px) {
  .topbar { height: 70px; }
  .brand > span:last-child { display: none; }
  .topbar-actions { gap: 7px; }
  .daily-timer { padding: 0 10px; }
  .hero { padding-top: 46px; }
  .setup-card { padding: 20px; }
  .history-card { padding: 19px; }
  .history-stats span { min-height: 20px; }
  .history-session-detail { align-items: flex-start; flex-direction: column; }
  .history-session-detail span { text-align: left; }
  .last-session { align-items: stretch; flex-direction: column; }
  .replay-button { width: 100%; }
  .data-transfer { align-items: stretch; flex-direction: column; }
  .data-actions { display: grid; grid-template-columns: 1fr 1fr; }
  .data-actions .danger-button { grid-column: 1 / -1; }
  .segmented { grid-template-columns: repeat(2, 1fr); }
  .match-controls.dual { grid-template-columns: 1fr; }
  .game-panel { padding-top: 35px; }
  .game-meta { grid-template-columns: 1fr 1.5fr 1fr; }
  .progress-wrap { padding: 0 10px; }
  .result-grid { grid-template-columns: repeat(2, 1fr); }
  .result-actions { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}