@font-face {
  font-family: "Bravura";
  src: url("fonts/Bravura.woff2") format("woff2");
  font-display: block;
}

:root {
  --bg: #14161c;
  --card: #1e212b;
  --paper: #faf8f0;
  --ink: #1b1b20;
  --text: #e8eaf0;
  --muted: #9aa1b0;
  --accent: #5b8def;
  --accent-strong: #3f6fd6;
  --good: #34c26b;
  --bad: #e05555;
  --line: #33384a;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
  -webkit-tap-highlight-color: transparent;
}

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

.screen {
  max-width: 560px;
  margin: 0 auto;
  padding: 16px 16px 48px;
}

/* ---------- Home ---------- */

.home-header {
  text-align: center;
  padding: 24px 0 8px;
}

.home-header h1 {
  margin: 0;
  font-size: 2rem;
  letter-spacing: 0.02em;
}

.tagline {
  color: var(--muted);
  margin: 6px 0 0;
}

.chooser {
  margin-top: 22px;
}

.chooser h2 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin: 0 0 8px;
}

.seg-row {
  display: flex;
  gap: 8px;
}

.seg-btn {
  flex: 1;
  padding: 10px 8px;
  border-radius: 10px;
  background: var(--card);
  border: 1px solid var(--line);
  color: var(--text);
  transition: background 0.15s, border-color 0.15s;
}

.seg-btn:hover {
  border-color: var(--accent);
}

.seg-btn.active {
  background: var(--accent-strong);
  border-color: var(--accent);
  font-weight: 600;
}

.key-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
}

.key-grid .seg-btn {
  flex: none;
}

.hint {
  color: var(--muted);
  font-size: 0.85rem;
  margin: 8px 0 0;
}

.btn-start {
  display: block;
  width: 100%;
  margin-top: 32px;
  padding: 14px;
  border-radius: 12px;
  background: var(--accent-strong);
  border: 1px solid var(--accent);
  color: #fff;
  font-size: 1.1rem;
  font-weight: 600;
}

.btn-start:hover {
  background: var(--accent);
}

.btn-secondary {
  display: block;
  width: 100%;
  margin-top: 12px;
  padding: 12px;
  border-radius: 12px;
  background: var(--card);
  border: 1px solid var(--line);
  font-size: 1rem;
}

/* ---------- Progress strip ---------- */

.progress-strip {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  gap: 6px;
  justify-content: center;
  padding: 12px 0;
  background: var(--bg);
}

.slot {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
  border: 2px solid var(--line);
  color: #fff;
}

.slot.pending {
  background: transparent;
}

.slot.current {
  border-color: var(--accent);
  box-shadow: 0 0 6px rgba(91, 141, 239, 0.6);
}

.slot.correct {
  background: var(--good);
  border-color: var(--good);
}

.slot.wrong {
  background: var(--bad);
  border-color: var(--bad);
}

/* ---------- Practice ---------- */

.practice-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 4px 0 12px;
}

.btn-icon {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--card);
  border: 1px solid var(--line);
  color: var(--muted);
}

.btn-icon:hover {
  color: var(--text);
  border-color: var(--accent);
}

.score {
  font-weight: 600;
  font-size: 1.05rem;
}

.count {
  margin-left: auto;
  color: var(--muted);
}

.staff-card {
  background: var(--paper);
  border-radius: 14px;
  padding: 8px 10px 12px;
  text-align: center;
}

.staff {
  width: 100%;
  max-width: 420px;
  display: block;
  margin: 0 auto;
}

.staff-line {
  stroke: var(--ink);
  stroke-width: 1.4;
}

.smufl {
  fill: var(--ink);
  font-family: "Bravura";
  user-select: none;
}

.btn-replay {
  margin-top: 4px;
  padding: 8px 20px;
  border-radius: 20px;
  background: var(--ink);
  color: var(--paper);
  font-size: 0.95rem;
}

/* ---------- Answers ---------- */

.answers {
  margin-top: 18px;
}

.abc-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
}

.solfege-row {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
}

.btn-answer {
  padding: 12px 4px;
  border-radius: 10px;
  background: var(--card);
  border: 1px solid var(--line);
  color: var(--text);
  font-size: 1rem;
  font-weight: 600;
  transition: background 0.1s, border-color 0.1s;
}

.btn-answer:hover:not(:disabled) {
  border-color: var(--accent);
}

.btn-answer:disabled {
  cursor: default;
  opacity: 0.85;
}

.btn-answer.correct {
  background: var(--good);
  border-color: var(--good);
  color: #fff;
  opacity: 1;
}

.btn-answer.wrong {
  background: var(--bad);
  border-color: var(--bad);
  color: #fff;
  opacity: 1;
}

/* ---------- Keyboard ---------- */

.kbd-wrap {
  overflow-x: auto;
  padding-bottom: 6px;
}

.kbd {
  display: block;
  margin: 0 auto;
  width: 100%;
  max-width: 280px;
  height: 150px;
}

.wkey {
  fill: #fdfdfa;
  stroke: #444;
  stroke-width: 1;
  cursor: pointer;
}

.wkey:hover {
  fill: #e8ecff;
}

.bkey {
  fill: #23252c;
  stroke: #000;
  stroke-width: 1;
  cursor: pointer;
}

.bkey:hover {
  fill: #3a3f52;
}

.key-correct {
  fill: var(--good) !important;
}

.key-wrong {
  fill: var(--bad) !important;
}

.key-disabled {
  pointer-events: none;
}

/* ---------- Summary ---------- */

.summary h1 {
  text-align: center;
  margin: 24px 0 16px;
}

.score-card {
  text-align: center;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 20px;
}

.final-score {
  font-size: 3rem;
  font-weight: 700;
}

.score-sub {
  color: var(--muted);
  margin-top: 4px;
}

.breakdown {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 18px;
}

.result-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border-radius: 10px;
  background: var(--card);
  border: 1px solid var(--line);
}

.result-chip.correct {
  border-color: rgba(52, 194, 107, 0.55);
}

.result-chip.wrong {
  border-color: rgba(224, 85, 85, 0.55);
}

.chip-idx {
  color: var(--muted);
  font-size: 0.8rem;
  width: 18px;
}

.chip-note {
  font-weight: 600;
}

.chip-icon {
  margin-left: auto;
  font-weight: 700;
}

.result-chip.correct .chip-icon {
  color: var(--good);
}

.result-chip.wrong .chip-icon {
  color: var(--bad);
}

.chip-pts {
  color: var(--muted);
  font-size: 0.85rem;
  width: 34px;
  text-align: right;
}

.summary-actions {
  margin-top: 24px;
}