/* ============================================================
   BPM Tap Tool — Styles
   FrequencyDetector.com
   ============================================================ */

/* ── Giant BPM Display ── */
.bpm-hero {
  text-align: center;
  padding: var(--space-xl) var(--space-md);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: rgba(0, 255, 65, 0.02);
  transition: border-color 0.15s, box-shadow 0.15s;
  margin-bottom: var(--space-md);
}

.bpm-hero.pulse {
  border-color: var(--color-primary);
  box-shadow: 0 0 40px rgba(0, 255, 65, 0.3), inset 0 0 25px rgba(0, 255, 65, 0.05);
}

.bpm-hero__value {
  font-family: var(--font-display);
  font-size: clamp(5rem, 20vw, 10rem);
  font-weight: 900;
  color: var(--color-primary);
  line-height: 1;
  letter-spacing: -0.02em;
  text-shadow: 0 0 30px rgba(0, 255, 65, 0.5), 0 0 60px rgba(0, 255, 65, 0.2);
  min-height: 1.1em;
}

.bpm-hero__unit {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.3em;
  margin-top: var(--space-xs);
}

.bpm-hero__marking {
  font-family: var(--font-mono);
  font-size: var(--fs-md);
  color: var(--color-secondary, #ff00ff);
  margin-top: var(--space-sm);
  letter-spacing: 0.05em;
  min-height: 1.5em;
}

/* ── Giant Tap Button ── */
.tap-area {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: var(--space-lg) 0;
  margin-bottom: var(--space-md);
}

.tap-button {
  position: relative;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  border: 3px solid var(--color-primary);
  background: rgba(0, 255, 65, 0.06);
  color: var(--color-primary);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: transform 0.1s, background 0.1s, box-shadow 0.1s;
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  outline: none;
  overflow: hidden;
}

.tap-button:hover {
  background: rgba(0, 255, 65, 0.1);
  box-shadow: 0 0 30px rgba(0, 255, 65, 0.2);
}

.tap-button:active,
.tap-button.tapped {
  transform: scale(0.94);
  background: rgba(0, 255, 65, 0.18);
  box-shadow: 0 0 50px rgba(0, 255, 65, 0.4), inset 0 0 30px rgba(0, 255, 65, 0.1);
}

.tap-button__label {
  font-family: var(--font-display);
  font-size: 2.8rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  pointer-events: none;
}

.tap-button__hint {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  pointer-events: none;
}

/* Pulse ring animation */
.tap-button__ring {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  border: 2px solid var(--color-primary);
  transform: translate(-50%, -50%) scale(1);
  opacity: 0;
  pointer-events: none;
}

.tap-button__ring.animate {
  animation: tap-ring-pulse 0.6s ease-out forwards;
}

@keyframes tap-ring-pulse {
  0% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 0.6;
  }
  100% {
    transform: translate(-50%, -50%) scale(1.6);
    opacity: 0;
  }
}

/* ── Stats Panel ── */
.stats-panel {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  padding: var(--space-md);
  margin-bottom: var(--space-md);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.stat-card {
  text-align: center;
  padding: var(--space-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: rgba(0, 255, 65, 0.02);
}

.stat-card__label {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.stat-card__value {
  display: block;
  font-family: var(--font-display);
  font-size: var(--fs-xl);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
}

/* ── Confidence Bar ── */
.confidence-row {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.confidence-row__label {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.confidence-bar {
  flex: 1;
  height: 8px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  overflow: hidden;
}

.confidence-bar__fill {
  height: 100%;
  width: 0%;
  background: var(--color-primary);
  border-radius: 4px;
  transition: width 0.3s, background 0.3s;
}

.confidence-bar__fill.low {
  background: #ff3c3c;
}

.confidence-bar__fill.medium {
  background: #ffaa00;
}

.confidence-bar__fill.high {
  background: var(--color-primary);
}

.confidence-row__value {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--color-primary);
  min-width: 48px;
  text-align: right;
  font-weight: 700;
}

/* ── Last 8 Intervals ── */
.intervals-section {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-sm) var(--space-md);
  margin-bottom: var(--space-md);
  background: var(--color-surface);
}

.intervals-list {
  display: flex;
  gap: var(--space-xs);
  flex-wrap: wrap;
  margin-top: var(--space-xs);
}

.interval-chip {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  padding: 4px 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: rgba(0, 255, 65, 0.04);
  color: var(--color-text-muted);
}

.interval-chip.latest {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: rgba(0, 255, 65, 0.1);
}

/* ── Actions Row ── */
.actions-row {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
  justify-content: center;
}

.toggle-row {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  cursor: pointer;
  user-select: none;
}

.toggle-row input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--color-primary);
  cursor: pointer;
}

.toggle-row__label {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
}

/* ── Copy success flash ── */
.btn.copied {
  background: var(--color-primary) !important;
  color: var(--color-bg) !important;
  border-color: var(--color-primary) !important;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .bpm-hero__value {
    font-size: clamp(4rem, 18vw, 7rem);
  }

  .bpm-hero {
    padding: var(--space-lg) var(--space-sm);
  }

  .tap-button {
    width: 200px;
    height: 200px;
  }

  .tap-button__label {
    font-size: 2.4rem;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stat-card__value {
    font-size: var(--fs-lg);
  }
}

@media (max-width: 480px) {
  .bpm-hero__value {
    font-size: clamp(3.5rem, 16vw, 5rem);
  }

  .bpm-hero {
    padding: var(--space-md) var(--space-sm);
  }

  .tap-button {
    width: 180px;
    height: 180px;
  }

  .tap-button__label {
    font-size: 2rem;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xs);
  }

  .stat-card {
    padding: var(--space-xs);
  }

  .stat-card__value {
    font-size: var(--fs-md);
  }

  .actions-row {
    flex-direction: column;
    gap: var(--space-sm);
  }

  .confidence-row {
    flex-wrap: wrap;
  }
}

/* ── Large screens: bigger tap button ── */
@media (min-width: 769px) {
  .tap-button {
    width: 240px;
    height: 240px;
  }

  .tap-button__label {
    font-size: 3.2rem;
  }
}