/* ============================================================
   Frequency Drift Monitor — Styles
   FrequencyDetector.com
   ============================================================ */

/* Large Current Frequency Display */
.drift-display-wrap {
  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);
}

.drift-display__value {
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 12vw, 8rem);
  font-weight: 900;
  color: var(--color-primary);
  line-height: 1;
  letter-spacing: -0.02em;
  text-shadow: 0 0 20px rgba(0, 255, 65, 0.4);
}

.drift-display__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);
}

/* Deviation Display — color-coded */
.deviation-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
}

.deviation-box {
  text-align: center;
}

.deviation-value {
  font-family: var(--font-mono);
  font-size: var(--fs-xl);
  font-weight: 700;
  padding: var(--space-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  transition: color 0.3s, border-color 0.3s, background 0.3s;
}

.deviation-value--ok {
  color: #00ff41;
  border-color: rgba(0, 255, 65, 0.3);
  background: rgba(0, 255, 65, 0.05);
}

.deviation-value--warn {
  color: #ffaa00;
  border-color: rgba(255, 170, 0, 0.3);
  background: rgba(255, 170, 0, 0.05);
}

.deviation-value--alert {
  color: #ff4444;
  border-color: rgba(255, 68, 68, 0.3);
  background: rgba(255, 68, 68, 0.05);
}

/* Drift Rate Display */
#drift-rate {
  font-family: var(--font-mono);
  font-size: var(--fs-lg);
  font-weight: 600;
}

/* Alert Indicator */
.alert-indicator {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  font-family: var(--font-mono);
  font-size: var(--fs-md);
  font-weight: 600;
}

.alert-dot {
  display: inline-block;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #555;
  flex-shrink: 0;
  transition: background 0.3s;
}

.alert-indicator--ok .alert-dot {
  background: #00ff41;
  box-shadow: 0 0 8px rgba(0, 255, 65, 0.6);
}

.alert-indicator--alert .alert-dot {
  background: #ff4444;
  box-shadow: 0 0 12px rgba(255, 68, 68, 0.8);
  animation: alert-pulse 0.6s ease infinite alternate;
}

.alert-indicator--ok {
  border-color: rgba(0, 255, 65, 0.3);
  color: #00ff41;
}

.alert-indicator--alert {
  border-color: rgba(255, 68, 68, 0.4);
  color: #ff4444;
}

@keyframes alert-pulse {
  from {
    box-shadow: 0 0 6px rgba(255, 68, 68, 0.5);
    opacity: 0.8;
  }
  to {
    box-shadow: 0 0 18px rgba(255, 68, 68, 1);
    opacity: 1;
  }
}

/* Statistics Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xs);
}

.stats-grid .stat-box:nth-child(4),
.stats-grid .stat-box:nth-child(5) {
  /* 4th and 5th items on second row */
}

/* Input with unit label */
.input-with-unit {
  display: flex;
  align-items: center;
  gap: 6px;
}

.input-number {
  width: 100%;
  padding: 6px 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  outline: none;
  transition: border-color 0.2s;
}

.input-number:focus {
  border-color: var(--color-primary);
}

.input-unit {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  white-space: nowrap;
  flex-shrink: 0;
}

/* Tall chart canvas for Hz vs time (main visualization) */
.viz-canvas-wrap--tall {
  height: 220px;
}

/* Standard canvas wraps (deviation + histogram) */
.viz-canvas-wrap {
  position: relative;
  width: 100%;
  height: 140px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-bg);
}

.viz-canvas-wrap canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

/* File Upload Area */
.file-upload-area {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  text-align: center;
  margin-bottom: var(--space-sm);
  transition: border-color 0.2s, background 0.2s;
  cursor: pointer;
}

.file-upload-area--dragover {
  border-color: var(--color-primary);
  background: rgba(0, 255, 65, 0.05);
}

.file-upload-area__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.file-upload-area__icon {
  font-size: 1.6rem;
}

.file-upload-area__text {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
}

.file-upload-area__label {
  color: var(--color-primary);
  cursor: pointer;
  text-decoration: underline;
}

.file-upload-area__hint {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  opacity: 0.7;
}

.file-upload-area__progress {
  width: 100%;
  height: 4px;
  background: var(--color-bg);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-top: var(--space-xs);
}

.file-upload-area__progress-bar {
  height: 100%;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  transition: width 0.15s linear;
  box-shadow: 0 0 6px rgba(0, 255, 65, 0.5);
}

.file-upload-area__status {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-xs);
}

/* Freeze Badge */
.freeze-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  color: #00e5ff;
  background: rgba(0, 229, 255, 0.12);
  border: 1px solid rgba(0, 229, 255, 0.4);
  border-radius: var(--radius-full);
  padding: 2px 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  animation: freeze-pulse 1s ease infinite alternate;
  vertical-align: middle;
}

@keyframes freeze-pulse {
  from { opacity: 0.7; }
  to { opacity: 1; }
}

/* Responsive */
@media (max-width: 768px) {
  .drift-display__value {
    font-size: 3.5rem;
  }

  .deviation-row {
    grid-template-columns: 1fr;
  }

  .deviation-value {
    font-size: var(--fs-lg);
  }

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

  .viz-canvas-wrap--tall {
    height: 180px;
  }
}