/* Tuner View Layout */
.tuner {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  padding: var(--space-lg);
  user-select: none;
}

/* Header */
.tuner__header {
  padding-bottom: var(--space-sm);
}

.tuner__title {
  font-size: var(--font-size-xs);
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-dim);
}

/* Note display area — top ~40% */
.tuner__note-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 0;
}

.tuner__note-name {
  font-size: var(--font-size-note);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--color-text);
  transition: color var(--transition-fast);
  position: relative;
}

.tuner__note-name .octave {
  font-size: var(--font-size-octave);
  font-weight: 400;
  color: var(--color-text-muted);
  vertical-align: baseline;
  margin-left: 2px;
}

.tuner__note-name.in-tune {
  color: var(--color-in-tune);
}

.tuner__note-name.close {
  color: var(--color-close);
}

.tuner__note-name.off {
  color: var(--color-off);
}

.tuner__note-name.idle {
  color: var(--color-text-dim);
}

/* Needle canvas area */
.tuner__needle-wrap {
  width: 100%;
  max-width: 400px;
  padding: var(--space-sm) 0;
}

.tuner__needle-canvas {
  width: 100%;
  height: 80px;
}

/* Cents readout */
.tuner__cents {
  font-family: var(--font-mono);
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
  min-height: 1.5em;
}

.tuner__cents.sharp {
  color: var(--color-close);
}

.tuner__cents.flat {
  color: var(--color-close);
}

.tuner__cents.in-tune {
  color: var(--color-in-tune);
}

/* Frequency readout */
.tuner__frequency {
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  color: var(--color-text-dim);
  min-height: 1.5em;
}

/* Mic button area */
.tuner__controls {
  padding: var(--space-lg) 0 var(--space-md);
}

.mic-btn {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-full);
  background: var(--color-bg-surface);
  border: 2px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  transition:
    background var(--transition-base),
    border-color var(--transition-base),
    box-shadow var(--transition-base);
  position: relative;
}

.mic-btn:hover {
  background: var(--color-bg-elevated);
  border-color: var(--color-text-dim);
}

.mic-btn:active {
  transform: scale(0.95);
}

.mic-btn svg {
  width: 28px;
  height: 28px;
  fill: var(--color-text-dim);
  transition: fill var(--transition-base);
}

.mic-btn.active {
  background: var(--color-accent-dim);
  border-color: var(--color-accent);
}

.mic-btn.active svg {
  fill: var(--color-accent);
}

.mic-btn.active::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: var(--radius-full);
  border: 2px solid var(--color-accent);
  opacity: 0;
  animation: mic-pulse 2s ease-out infinite;
}

@keyframes mic-pulse {
  0% {
    opacity: 0.6;
    transform: scale(1);
  }
  100% {
    opacity: 0;
    transform: scale(1.3);
  }
}

.mic-btn.error {
  border-color: var(--color-off);
}

.mic-btn.error svg {
  fill: var(--color-off);
}

/* Mic hint text */
.tuner__hint {
  font-size: var(--font-size-xs);
  color: var(--color-text-dim);
  text-align: center;
  margin-top: var(--space-sm);
  transition: opacity var(--transition-base);
}

.tuner__hint.hidden {
  opacity: 0;
}

/* Responsive — larger screens */
@media (min-width: 768px) {
  .tuner__needle-wrap {
    max-width: 500px;
  }

  .tuner__needle-canvas {
    height: 100px;
  }
}