/* v0.1.0 */
:root {
  --bg: #f7fbf6;
  --panel: #ffffff;
  --ink: #24302f;
  --muted: #657272;
  --line: #d7e4df;
  --primary: #1c8a62;
  --primary-dark: #126845;
  --accent: #ffca3a;
  --danger: #d84949;
  --shadow: 0 8px 20px rgba(36, 48, 47, 0.1);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background: var(--bg);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
select {
  font: inherit;
}

.app-shell {
  width: min(100%, 980px);
  min-height: 100vh;
  margin: 0 auto;
  padding: 14px;
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 10px;
}

.app-header {
  display: grid;
  grid-template-columns: 1fr minmax(180px, 260px);
  gap: 12px;
  align-items: end;
}

h1 {
  margin: 2px 0 4px;
  font-size: clamp(1.45rem, 4vw, 2.15rem);
  line-height: 1.05;
  letter-spacing: 0;
}

.lead,
.practice-text,
.orientation-notice {
  margin: 0;
  color: var(--muted);
}

.orientation-notice {
  display: inline-block;
  padding: 5px 9px;
  border-radius: 6px;
  background: #e7f4ef;
  color: var(--primary-dark);
  font-size: 0.86rem;
  font-weight: 700;
}

.song-picker {
  display: grid;
  gap: 6px;
  font-weight: 700;
}

.song-picker select {
  width: 100%;
  min-height: 48px;
  padding: 8px 12px;
  border: 2px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--ink);
}

main {
  display: grid;
  gap: 10px;
  align-content: start;
}

.control-panel,
.practice-area {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.control-panel {
  padding: 12px;
  display: grid;
  gap: 10px;
}

.play-row {
  display: grid;
  grid-template-columns: minmax(110px, 1fr) minmax(110px, 1fr) minmax(120px, 1.2fr);
  gap: 10px;
  align-items: center;
}

.status {
  margin: 0;
  min-height: 48px;
  padding: 12px;
  border-radius: 8px;
  background: #f1f5f3;
  color: var(--primary-dark);
  font-weight: 800;
  text-align: center;
}

.control-groups {
  display: grid;
  grid-template-columns: 1.4fr 1.1fr 0.8fr;
  gap: 10px;
}

.button-group {
  min-width: 0;
  margin: 0;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.loop-group {
  grid-template-columns: 1fr;
}

legend {
  padding: 0 5px;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 800;
}

.button {
  min-height: 48px;
  border: 2px solid transparent;
  border-radius: 8px;
  padding: 10px 12px;
  background: #eef5f1;
  color: var(--ink);
  font-weight: 800;
  cursor: pointer;
  touch-action: manipulation;
}

.button:active {
  transform: translateY(1px);
}

.button.primary {
  background: var(--primary);
  color: #fff;
}

.button.danger {
  background: #fff0f0;
  color: #a72b2b;
  border-color: #f0b9b9;
}

.button.active,
#loopButton.active {
  background: var(--accent);
  color: #3f3000;
  border-color: #9c7400;
}

.practice-area {
  padding: 12px;
  display: grid;
  gap: 10px;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.step-card {
  min-height: 70px;
  padding: 10px;
  border: 2px solid var(--line);
  border-radius: 8px;
  background: #fbfdfc;
  display: grid;
  place-items: center;
  text-align: center;
}

.step-card strong {
  font-size: 0.86rem;
  color: var(--muted);
}

.step-card span {
  font-size: 1.2rem;
  font-weight: 900;
}

.step-card.active {
  border-color: var(--primary);
  background: #e6f5ee;
}

.practice-text {
  font-size: 0.98rem;
  line-height: 1.45;
}

.ad-space {
  min-height: 44px;
  border: 2px dashed #b9c8c2;
  border-radius: 8px;
  display: grid;
  place-items: center;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.6);
  font-weight: 700;
}

@media (max-height: 430px) and (orientation: landscape) {
  .app-shell {
    padding: 8px;
    gap: 7px;
  }

  .control-panel,
  .practice-area {
    padding: 8px;
  }

  .button {
    min-height: 42px;
    padding: 8px 9px;
  }

  .step-card {
    min-height: 56px;
  }
}

@media (orientation: portrait) and (max-width: 700px) {
  .app-header,
  .play-row,
  .control-groups {
    grid-template-columns: 1fr;
  }

  .orientation-notice {
    display: block;
    padding: 10px;
    background: #ffe49a;
    color: #4a3600;
    text-align: center;
  }

  .steps {
    grid-template-columns: 1fr;
  }
}