:root {
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #f8fafc;
  color: #172033;
  --panel: #ffffff;
  --line: #d8dee8;
  --ink-soft: #617087;
  --good: #16875d;
  --high: #c05621;
  --low: #2f6fc8;
  --accent: #143d59;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.86), rgba(248, 250, 252, 0.96)),
    radial-gradient(circle at top left, rgba(22, 135, 93, 0.16), transparent 34rem);
}

button,
input {
  font: inherit;
}

.app-shell {
  width: min(980px, 100%);
  min-height: 100vh;
  margin: 0 auto;
  padding: clamp(16px, 4vw, 32px);
  display: grid;
  gap: 16px;
  align-content: start;
}

.topbar,
.meter-panel,
.controls-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 12px 32px rgba(23, 32, 51, 0.08);
}

.topbar {
  min-height: 92px;
  padding: 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.eyebrow,
.label {
  display: block;
  margin: 0 0 4px;
  color: var(--ink-soft);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.eyebrow span {
  color: var(--accent);
}

h1 {
  margin: 0;
  font-size: clamp(1.45rem, 5vw, 2.2rem);
  line-height: 1.05;
  letter-spacing: 0;
}

.button-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.primary-button,
.secondary-button {
  min-width: 96px;
  min-height: 48px;
  border-radius: 8px;
  font-weight: 800;
  cursor: pointer;
}

.primary-button {
  border: 0;
  background: var(--accent);
  color: #fff;
}

.secondary-button {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--accent);
}

.primary-button.listening {
  background: #8f2d39;
}

.meter-panel {
  padding: 14px;
}

.status-row,
.summary-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.status-row > div,
.summary-grid > div {
  min-height: 72px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfe;
}

strong {
  display: block;
  overflow-wrap: anywhere;
  font-size: clamp(1.05rem, 4vw, 1.5rem);
  line-height: 1.15;
}

#pitchCanvas {
  width: 100%;
  aspect-ratio: 2 / 1;
  display: block;
  margin: 14px 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
}

.scale-strip {
  display: grid;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  gap: 6px;
}

.swara {
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: grid;
  gap: 2px;
  place-items: center;
  color: var(--ink-soft);
  font-weight: 800;
  background: #f6f8fb;
}

.swara small {
  font-size: 0.7rem;
  font-weight: 700;
  color: inherit;
}

.swara.active {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
}

.controls-panel {
  padding: 14px;
  display: grid;
  gap: 14px;
}

.control {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 12px;
  align-items: center;
  color: var(--ink-soft);
  font-weight: 800;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

.summary-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

@media (max-width: 680px) {
  .app-shell {
    padding: 12px;
  }

  .topbar {
    min-height: 84px;
  }

  .button-row {
    flex-direction: column-reverse;
    align-items: stretch;
  }

  .primary-button,
  .secondary-button {
    min-width: 88px;
  }

  .status-row,
  .summary-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .control {
    grid-template-columns: 1fr auto;
  }

  .control input {
    grid-column: 1 / -1;
  }

  .scale-strip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}