:root {
  color-scheme: dark;
  --bg: #141624;
  --panel: #1c2030;
  --text: #eef0f7;
  --muted: #9da4b8;
  --accent: #79a7ff;
  --guide: #ffc977;
  --wrong: #ff7878;
  --key: #f0ecdf;
  --black: #171717;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.app {
  min-height: 100vh;
  padding: 20px clamp(16px, 4vw, 48px);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

h1 {
  margin: 0;
  font-size: 26px;
}

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

.actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

button {
  min-width: 68px;
  border: 1px solid #3b425c;
  background: #242a3d;
  color: var(--text);
  padding: 8px 10px;
  border-radius: 6px;
  font: inherit;
  cursor: pointer;
}

button:hover {
  border-color: var(--accent);
}

button[aria-pressed="true"] {
  border-color: var(--accent);
  color: var(--accent);
}

.readout {
  min-height: 150px;
  padding-top: 26px;
}

.current {
  min-height: 58px;
  color: var(--accent);
  font-size: clamp(38px, 7vw, 72px);
  font-weight: 800;
}

.pressed-line {
  min-height: 22px;
  color: var(--accent);
  font-size: clamp(14px, 2vw, 18px);
}

.finger-line {
  min-height: 24px;
  margin-top: 4px;
  color: #d8c396;
  font-size: clamp(14px, 2vw, 18px);
}

.item,
.lesson,
.detail,
.next {
  margin-top: 6px;
  color: var(--guide);
  font-size: clamp(14px, 2vw, 18px);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.lesson {
  color: #c9d6f2;
}

.next {
  color: #d8c396;
}

.keyboard-wrap {
  width: min(100%, 1040px);
  margin: 20px auto 0;
}

.keyboard {
  position: relative;
  height: 276px;
}

.white-key,
.black-key,
.thumb-key {
  position: absolute;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: center;
  border: 1px solid #424554;
  user-select: none;
}

.white-key {
  top: 0;
  height: 220px;
  background: var(--key);
  color: #414553;
  border-radius: 4px;
  padding-bottom: 18px;
  z-index: 1;
}

.black-key {
  top: 0;
  height: 138px;
  background: var(--black);
  color: #c5c9d5;
  border-radius: 4px;
  padding-bottom: 12px;
  z-index: 2;
}

.thumb-key {
  background: #252b3d;
  color: #d4d9e8;
  border-radius: 4px;
  padding-bottom: 7px;
  z-index: 0;
}

.note {
  font-size: 20px;
  font-weight: 700;
}

.label {
  margin-top: 10px;
  color: #7c8090;
  font-size: 18px;
}

.guide {
  background: var(--guide);
  color: #3d2a00;
}

.pressed {
  background: #9fbfff;
}

.wrong {
  background: var(--wrong);
}

.wave {
  display: none;
  width: min(100%, 1040px);
  height: 120px;
  margin: 34px auto 0;
  border: 1px solid #35405e;
  border-radius: 6px;
  background: #101525;
}

.wave.visible {
  display: block;
}

@media (max-width: 760px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .keyboard {
    height: 214px;
  }

  .white-key {
    height: 170px;
    padding-bottom: 12px;
  }

  .black-key {
    height: 108px;
  }

  .thumb-key {
    padding-bottom: 5px;
  }

  .note,
  .label {
    font-size: 13px;
  }
}