:root {
  color-scheme: dark;
  --ink: #0c1211;
  --panel: #131d1a;
  --panel-2: #192521;
  --line: rgba(230, 239, 231, 0.14);
  --line-strong: rgba(230, 239, 231, 0.28);
  --text: #eef3ed;
  --muted: #94a39a;
  --lime: #d7ff66;
  --lime-dark: #a7d72d;
  --coral: #ff745b;
  --blue: #74c9d5;
  --amber: #ffc85a;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.26);
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  color: var(--text);
  background:
    radial-gradient(circle at 78% -10%, rgba(116, 201, 213, 0.12), transparent 32rem),
    var(--ink);
  font-family: var(--sans);
}
button, input, select { font: inherit; }
button { color: inherit; }
button:focus-visible, input:focus-visible, select:focus-visible, a:focus-visible {
  outline: 3px solid var(--lime);
  outline-offset: 3px;
}
button:disabled { cursor: not-allowed; opacity: 0.34; }
.app-shell { min-height: 100vh; }

.app-header {
  min-height: 88px;
  padding: 18px clamp(18px, 4vw, 64px);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
  border-bottom: 1px solid var(--line);
}
.brand { display: inline-flex; align-items: center; gap: 13px; color: inherit; text-decoration: none; }
.brand > span:last-child { display: grid; gap: 3px; }
.brand strong { font-size: 17px; letter-spacing: 0.08em; }
.brand small { color: var(--muted); font: 700 8px/1 var(--mono); letter-spacing: 0.14em; }
.brand-pulse { width: 42px; height: 32px; display: flex; align-items: flex-end; gap: 4px; }
.brand-pulse i { width: 7px; background: var(--lime); }
.brand-pulse i:nth-child(1) { height: 13px; }
.brand-pulse i:nth-child(2) { height: 29px; }
.brand-pulse i:nth-child(3) { height: 19px; }
.brand-pulse i:nth-child(4) { height: 8px; }
.header-principle { display: flex; align-items: center; gap: 10px; }
.header-principle span { color: var(--muted); font-size: 11px; }
.header-principle b { padding: 8px 12px; border: 1px solid var(--line); font: 700 11px var(--mono); }
.settings-jump { justify-self: end; padding: 10px 14px; border: 1px solid var(--line-strong); background: transparent; cursor: pointer; font-size: 11px; font-weight: 800; }

main { width: min(1540px, 100%); margin: 0 auto; }
.control-deck {
  margin: 38px clamp(18px, 4vw, 64px) 18px;
  display: grid;
  grid-template-columns: minmax(300px, 1fr) minmax(330px, 0.85fr) minmax(220px, 0.55fr);
  border: 1px solid var(--line);
  background: rgba(19, 29, 26, 0.84);
  box-shadow: var(--shadow);
}
.control-deck > div { min-height: 138px; padding: 23px 26px; border-right: 1px solid var(--line); }
.control-deck > div:last-child { border-right: 0; }
.level-control { display: grid; grid-template-columns: 42px 1fr 42px; align-items: center; gap: 17px; }
.level-control > button, .pattern-nav button {
  width: 42px; height: 42px; border: 1px solid var(--line-strong); background: transparent; cursor: pointer; font-size: 18px;
}
.level-control span, .eyebrow, .section-label span, .pattern-nav > span {
  color: var(--lime); font: 800 9px var(--mono); letter-spacing: 0.16em;
}
.level-control h1 { margin: 8px 0 4px; font-size: clamp(25px, 2.5vw, 38px); line-height: 1; letter-spacing: -0.04em; }
.level-control p { margin: 0; color: var(--muted); font-size: 12px; }
.tempo-control { display: grid; grid-template-columns: 90px 1fr; gap: 9px 18px; align-items: center; }
.tempo-readout { grid-row: 1 / 3; display: grid; align-content: center; border-right: 1px solid var(--line); }
.tempo-readout span { color: var(--muted); font: 700 9px var(--mono); letter-spacing: 0.15em; }
.tempo-readout output { margin-top: 4px; font: 800 52px/1 var(--mono); }
input[type="range"] { width: 100%; accent-color: var(--lime); }
.tempo-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 5px; }
.tempo-steps button { padding: 7px; border: 1px solid var(--line); background: transparent; cursor: pointer; font: 800 10px var(--mono); }
.transport-control { display: grid; gap: 8px; }
.start-button { min-height: 68px; padding: 12px 18px; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 12px; border: 0; color: var(--ink); background: var(--lime); cursor: pointer; text-align: left; }
.start-button > span { font-size: 22px; }
.start-button b { font-size: 15px; }
.start-button small { font: 800 8px var(--mono); }
.start-button.running { background: var(--coral); }
.restart-button { padding: 8px; border: 1px solid var(--line); background: transparent; cursor: pointer; font-size: 10px; }

.workspace { margin: 0 clamp(18px, 4vw, 64px); display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 18px; }
.stage-card, .coach-card, .score-card, .settings-card {
  border: 1px solid var(--line); background: var(--panel); box-shadow: var(--shadow);
}
.stage-card { min-width: 0; padding: clamp(22px, 3vw, 38px); position: relative; overflow: hidden; }
.stage-heading { display: flex; align-items: start; justify-content: space-between; gap: 24px; }
.stage-heading h2 { margin: 8px 0 5px; font-size: clamp(27px, 3vw, 43px); letter-spacing: -0.045em; }
.stage-heading p { margin: 0; color: var(--muted); font-size: 12px; }
.pattern-nav { display: grid; grid-template-columns: auto 42px 42px; align-items: center; gap: 6px; }
.pattern-nav > span { margin-right: 7px; color: var(--muted); white-space: nowrap; }

.count-in-display { position: absolute; z-index: 20; inset: 0; display: grid; place-content: center; justify-items: center; background: rgba(12, 18, 17, 0.91); backdrop-filter: blur(5px); }
.count-in-display[hidden], .key-capture[hidden] { display: none; }
.count-in-display span { color: var(--lime); font: 800 11px var(--mono); letter-spacing: 0.2em; }
.count-in-display b { font: 900 clamp(110px, 18vw, 220px)/0.9 var(--mono); }
.beat-rail { margin: 35px 0 12px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.beat-rail > div { height: 42px; padding: 0 13px; display: flex; align-items: center; gap: 9px; border: 1px solid var(--line); transition: 100ms linear; }
.beat-rail span { color: var(--muted); font: 800 12px var(--mono); }
.beat-rail i { height: 3px; flex: 1; background: var(--line); }
.beat-rail .active { color: var(--ink); background: var(--lime); border-color: var(--lime); }
.beat-rail .active span { color: var(--ink); }
.beat-rail .active i { background: var(--ink); }

.measure-grid { display: grid; grid-template-columns: repeat(4, minmax(165px, 1fr)); gap: 8px; }
.beat-grid { min-width: 0; position: relative; display: grid; grid-template-columns: repeat(8, minmax(18px, 1fr)); border: 1px solid var(--line); background: var(--panel-2); }
.beat-grid::before { content: attr(data-beat-label); position: absolute; z-index: 2; left: 7px; top: 7px; color: var(--muted); font: 800 8px var(--mono); pointer-events: none; }
.beat-grid.current { border-color: var(--lime); box-shadow: inset 0 0 0 1px var(--lime); }
.grid-cell { min-width: 0; min-height: 126px; padding: 28px 2px 10px; position: relative; display: grid; grid-template-rows: 23px 1fr 22px; place-items: center; border: 0; border-right: 1px solid var(--line); background: transparent; }
.grid-cell:last-child { border-right: 0; }
.grid-cell:nth-child(5) { border-left: 1px solid var(--line-strong); }
.grid-cell .count { color: var(--muted); font: 700 10px var(--mono); }
.grid-cell .mark { width: 17px; height: 17px; display: grid; place-items: center; border: 2px solid var(--muted); border-radius: 50%; color: transparent; font: 900 10px var(--mono); }
.grid-cell.target .mark { width: 21px; height: 21px; color: var(--ink); border-color: var(--lime); background: var(--lime); }
.grid-cell.guide .mark { border-style: dashed; border-color: var(--blue); }
.grid-cell .pick { color: var(--muted); font-size: 13px; font-weight: 900; }
.grid-cell.active { background: rgba(215, 255, 102, 0.1); }
.grid-cell.active::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 5px; background: var(--lime); }
.grid-cell.active .count { color: var(--text); }
.grid-cell[data-feedback="perfect"] { background: rgba(215, 255, 102, 0.16); }
.grid-cell[data-feedback="early"]::before, .grid-cell[data-feedback="late"]::before, .grid-cell[data-feedback="miss"]::before {
  position: absolute; z-index: 3; right: 2px; top: 2px; font: 900 12px var(--mono);
}
.grid-cell[data-feedback="early"]::before { content: "←"; color: var(--blue); }
.grid-cell[data-feedback="late"]::before { content: "→"; color: var(--amber); }
.grid-cell[data-feedback="miss"]::before { content: "×"; color: var(--coral); }
.grid-cell.hide-picking .pick { visibility: hidden; }
.grid-legend { padding: 12px 2px 0; display: flex; flex-wrap: wrap; align-items: center; gap: 15px; color: var(--muted); font-size: 9px; }
.grid-legend span { display: inline-flex; align-items: center; gap: 6px; }
.grid-legend i { width: 10px; height: 10px; display: inline-block; border: 1px solid var(--muted); border-radius: 50%; }
.grid-legend .legend-target { border-color: var(--lime); background: var(--lime); }
.grid-legend b { color: var(--text); font: 800 11px var(--mono); }
.grid-legend button { margin-left: auto; padding: 6px 0; border: 0; border-bottom: 1px solid var(--line-strong); color: var(--muted); background: transparent; cursor: pointer; font-size: 9px; }

.live-feedback { min-height: 74px; margin-top: 24px; padding: 13px 17px; display: grid; grid-template-columns: 42px 1fr auto; align-items: center; gap: 14px; border: 1px solid var(--line); background: #0e1614; }
.live-feedback > span { width: 40px; height: 40px; display: grid; place-items: center; border: 1px solid var(--line-strong); border-radius: 50%; font: 900 20px var(--mono); }
.live-feedback div { display: grid; gap: 4px; }
.live-feedback div b { font-size: 13px; }
.live-feedback div small { color: var(--muted); font-size: 9px; }
.live-feedback output { font: 800 21px var(--mono); }
.live-feedback[data-tone="perfect"] { border-color: var(--lime); }
.live-feedback[data-tone="perfect"] > span, .live-feedback[data-tone="perfect"] output { color: var(--lime); }
.live-feedback[data-tone="early"] > span, .live-feedback[data-tone="early"] output { color: var(--blue); }
.live-feedback[data-tone="late"] > span, .live-feedback[data-tone="late"] output { color: var(--amber); }
.live-feedback[data-tone="miss"] > span, .live-feedback[data-tone="miss"] output { color: var(--coral); }
.tap-pad { width: 100%; min-height: 72px; margin-top: 10px; display: grid; place-items: center; gap: 2px; border: 1px solid var(--line-strong); background: transparent; cursor: pointer; touch-action: manipulation; }
.tap-pad:active { color: var(--ink); background: var(--lime); transform: translateY(1px); }
.tap-pad span { font: 900 17px var(--mono); letter-spacing: 0.16em; }
.tap-pad small { color: var(--muted); font-size: 8px; }

.side-column { display: grid; align-content: start; gap: 18px; }
.coach-card, .score-card { padding: 25px; }
.section-label { display: flex; align-items: baseline; justify-content: space-between; padding-bottom: 13px; border-bottom: 1px solid var(--line); }
.section-label b { font-size: 13px; }
.coach-card > p { margin: 22px 0; color: #c5d0c9; font-size: 13px; line-height: 1.8; }
.foot-hand { display: grid; gap: 7px; }
.foot-hand > div { padding: 10px; display: grid; grid-template-columns: 30px 1fr; align-items: center; background: #0e1614; }
.foot-hand span { color: var(--lime); font-weight: 900; }
.foot-hand b { overflow: hidden; font: 700 10px var(--mono); white-space: nowrap; text-overflow: ellipsis; }
.coach-card blockquote { margin: 18px 0; padding: 14px 17px; border-left: 4px solid var(--coral); color: var(--text); background: rgba(255, 116, 91, 0.08); font-size: 17px; font-weight: 850; }
.coach-card > small { color: var(--muted); font-size: 10px; line-height: 1.65; }
.score-primary { padding: 18px 0; display: flex; align-items: end; justify-content: space-between; }
.score-primary span { color: var(--muted); font-size: 11px; }
.score-primary b { color: var(--lime); font: 900 45px/1 var(--mono); }
.score-grid { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.score-grid > div { min-height: 66px; padding: 10px; display: grid; align-content: center; gap: 7px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.score-grid span { color: var(--muted); font-size: 8px; }
.score-grid b { font: 800 14px var(--mono); }
.timing-scale { margin-top: 18px; display: grid; grid-template-columns: repeat(3, 1fr); color: var(--muted); font: 700 7px var(--mono); }
.timing-scale span:nth-child(2) { text-align: center; }
.timing-scale span:nth-child(3) { text-align: right; }
.timing-scale > div { grid-column: 1 / 4; height: 17px; position: relative; margin-top: 6px; }
.timing-scale i { position: absolute; left: 0; right: 0; top: 8px; height: 1px; background: linear-gradient(90deg, var(--blue), var(--line-strong) 50%, var(--amber)); }
.timing-scale i::after { content: ""; position: absolute; left: 50%; top: -5px; width: 1px; height: 11px; background: var(--text); }
.timing-scale b { width: 9px; height: 9px; position: absolute; left: 50%; top: 4px; border-radius: 50%; background: var(--lime); transform: translateX(-50%); transition: left 100ms linear; }
.advice { margin: 17px 0 0; padding: 12px; color: var(--muted); background: #0e1614; font-size: 10px; line-height: 1.6; }

.settings-card { margin: 18px clamp(18px, 4vw, 64px); padding: clamp(24px, 3.5vw, 46px); display: grid; grid-template-columns: 0.7fr 1.3fr; gap: clamp(30px, 5vw, 80px); }
.settings-intro h2 { max-width: 520px; margin: 10px 0 16px; font-size: clamp(30px, 4vw, 52px); line-height: 1.05; letter-spacing: -0.05em; }
.settings-intro p { max-width: 500px; color: var(--muted); font-size: 12px; line-height: 1.8; }
.settings-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
fieldset { min-width: 0; margin: 0; padding: 19px; border: 1px solid var(--line); }
fieldset:first-child { grid-column: 1 / 3; }
legend { padding: 0 7px; color: var(--lime); font: 800 9px var(--mono); letter-spacing: 0.12em; }
fieldset > label:not(.toggle-line) { margin-top: 11px; display: grid; grid-template-columns: 96px 1fr auto; align-items: center; gap: 10px; }
fieldset label > span { color: var(--muted); font-size: 10px; }
fieldset select { width: 100%; padding: 9px 25px 9px 9px; border: 1px solid var(--line); color: var(--text); background: var(--panel-2); }
fieldset output { min-width: 36px; font: 700 9px var(--mono); text-align: right; }
.key-list { min-height: 51px; display: flex; flex-wrap: wrap; gap: 7px; align-items: center; }
.key-chip { min-height: 42px; padding: 7px 8px 7px 13px; display: inline-flex; align-items: center; gap: 12px; border: 1px solid var(--line-strong); background: var(--panel-2); }
.key-chip kbd { font: 800 13px var(--mono); }
.key-chip button { width: 24px; height: 24px; border: 0; color: var(--muted); background: transparent; cursor: pointer; }
.key-actions { margin-top: 12px; display: flex; flex-wrap: wrap; gap: 7px; }
.key-actions button { padding: 9px 12px; border: 1px solid var(--line-strong); background: transparent; cursor: pointer; font-size: 9px; }
.key-settings > p { margin: 12px 0 0; color: var(--muted); font-size: 9px; }
.toggle-line { margin-top: 11px; display: flex; align-items: center; gap: 8px; cursor: pointer; }
.toggle-line input { position: absolute; opacity: 0; pointer-events: none; }
.toggle-line > span { width: 32px; height: 18px; position: relative; border: 1px solid var(--line-strong); border-radius: 20px; }
.toggle-line > span::after { content: ""; width: 10px; height: 10px; position: absolute; left: 3px; top: 3px; border-radius: 50%; background: var(--muted); transition: 140ms; }
.toggle-line input:checked + span { border-color: var(--lime); }
.toggle-line input:checked + span::after { left: 17px; background: var(--lime); }
.toggle-line b { font-size: 10px; }

.level-map { margin: 70px clamp(18px, 4vw, 64px); }
.level-map > div:first-child { display: flex; align-items: end; justify-content: space-between; gap: 20px; }
.level-map h2 { margin: 9px 0 24px; font-size: clamp(29px, 4vw, 54px); letter-spacing: -0.05em; }
.level-list { display: grid; grid-template-columns: repeat(8, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.level-item { min-height: 166px; padding: 17px 13px; display: grid; grid-template-rows: auto 1fr auto; gap: 12px; border: 0; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: transparent; cursor: pointer; text-align: left; }
.level-item:hover, .level-item.active { color: var(--ink); background: var(--lime); }
.level-item > span { color: var(--coral); font: 800 14px var(--mono); }
.level-item h3 { margin: 0 0 6px; font-size: 14px; }
.level-item p { margin: 0; color: var(--muted); font-size: 9px; line-height: 1.5; }
.level-item:hover p, .level-item.active p { color: rgba(12, 18, 17, 0.62); }
.level-item > b { font: 700 8px var(--mono); }
footer { min-height: 100px; padding: 25px clamp(18px, 4vw, 64px); display: flex; align-items: center; justify-content: space-between; gap: 20px; border-top: 1px solid var(--line); }
footer p, footer span { color: var(--muted); font-size: 9px; }

.key-capture { position: fixed; z-index: 100; inset: 0; display: grid; place-items: center; padding: 18px; background: rgba(4, 7, 6, 0.9); backdrop-filter: blur(8px); }
.key-capture > div { width: min(480px, 100%); padding: 48px; border: 1px solid var(--lime); background: var(--panel); box-shadow: 16px 16px 0 var(--lime); text-align: center; }
.key-capture span { color: var(--lime); font: 800 9px var(--mono); letter-spacing: 0.18em; }
.key-capture h2 { margin: 17px 0 8px; font-size: 38px; }
.key-capture p { color: var(--muted); font-size: 11px; }
.key-capture button { margin-top: 20px; padding: 10px 25px; border: 1px solid var(--line-strong); background: transparent; cursor: pointer; }
.toast { position: fixed; z-index: 120; left: 50%; bottom: 24px; max-width: calc(100% - 30px); padding: 11px 18px; color: var(--ink); background: var(--lime); box-shadow: var(--shadow); transform: translate(-50%, 20px); opacity: 0; pointer-events: none; transition: 180ms; font-size: 10px; font-weight: 850; }
.toast.show { transform: translate(-50%, 0); opacity: 1; }

@media (max-width: 1180px) {
  .control-deck { grid-template-columns: 1fr 1fr; }
  .control-deck > div:nth-child(2) { border-right: 0; }
  .control-deck > div:last-child { grid-column: 1 / 3; min-height: auto; display: grid; grid-template-columns: 1fr 180px; border-top: 1px solid var(--line); }
  .workspace { grid-template-columns: 1fr; }
  .side-column { grid-template-columns: 1fr 1fr; }
  .measure-grid { grid-template-columns: repeat(2, minmax(240px, 1fr)); }
  .level-list { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 760px) {
  .app-header { grid-template-columns: 1fr auto; }
  .header-principle { display: none; }
  .settings-jump { font-size: 9px; }
  .control-deck { display: block; margin-top: 18px; }
  .control-deck > div { min-height: auto; border-right: 0; border-bottom: 1px solid var(--line); }
  .control-deck > div:last-child { display: grid; grid-template-columns: 1fr 115px; border-bottom: 0; }
  .tempo-control { min-height: 130px !important; }
  .stage-card { padding: 22px 14px; }
  .stage-heading { display: grid; }
  .pattern-nav { grid-template-columns: 1fr 42px 42px; }
  .measure-grid { grid-template-columns: 1fr; }
  .grid-cell { min-height: 91px; padding-top: 24px; }
  .beat-rail { position: sticky; top: 0; z-index: 10; background: var(--panel); }
  .side-column { grid-template-columns: 1fr; }
  .settings-card { display: block; }
  .settings-grid { margin-top: 32px; display: block; }
  fieldset { margin-top: 12px; }
  .level-list { grid-template-columns: repeat(2, 1fr); }
  footer { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 440px) {
  .brand small { display: none; }
  .settings-jump { padding: 8px; }
  .level-control { grid-template-columns: 36px 1fr 36px; padding-left: 14px !important; padding-right: 14px !important; gap: 10px; }
  .level-control > button { width: 36px; height: 36px; }
  .tempo-control { grid-template-columns: 76px 1fr; padding: 18px !important; }
  .tempo-readout output { font-size: 43px; }
  .pattern-nav > span { white-space: normal; }
  .grid-legend button { width: 100%; margin-left: 0; text-align: left; }
  .live-feedback { grid-template-columns: 36px 1fr; }
  .live-feedback > span { width: 34px; height: 34px; }
  .live-feedback output { grid-column: 2; font-size: 17px; }
  .settings-card { padding: 22px 15px; }
  fieldset > label:not(.toggle-line) { grid-template-columns: 82px 1fr auto; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}