* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg-color: #0a0e14;
  --accent-color: #00d4ff;
  --panel-bg: rgba(10, 14, 20, 0.85);
  --panel-border: rgba(0, 212, 255, 0.3);
  --text-color: #e6e6e6;
  --text-dim: #999999;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg-color);
  color: var(--text-color);
  overflow: hidden;
  width: 100vw;
  height: 100vh;
}

#viewport {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: block;
}

#drop-zone {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-color);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

#drop-zone.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

#drop-zone.drag-over {
  background: rgba(0, 212, 255, 0.05);
}

#drop-content {
  text-align: center;
  padding: 3rem;
  border: 2px dashed var(--panel-border);
  border-radius: 1rem;
  background: var(--panel-bg);
  backdrop-filter: blur(10px);
  transition: border-color 0.2s ease;
}

#drop-zone.drag-over #drop-content {
  border-color: var(--accent-color);
}

#drop-content h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  color: var(--accent-color);
  font-weight: 300;
  letter-spacing: 0.05em;
}

#drop-content p {
  font-size: 1.2rem;
  color: var(--text-dim);
  margin-bottom: 1.5rem;
}

#file-input {
  display: none;
}

.file-button {
  display: inline-block;
  padding: 0.75rem 2rem;
  background: var(--accent-color);
  color: var(--bg-color);
  border-radius: 0.5rem;
  cursor: pointer;
  font-weight: 500;
  transition: background 0.2s ease, transform 0.1s ease;
}

.file-button:hover {
  background: #00b8e0;
  transform: translateY(-2px);
}

.file-button:active {
  transform: translateY(0);
}

.panel {
  position: fixed;
  background: var(--panel-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--panel-border);
  border-radius: 0.5rem;
  padding: 1rem;
  transition: opacity 0.3s ease;
}

.panel.hidden {
  opacity: 0;
  pointer-events: none;
}

#stats-panel {
  top: 1rem;
  right: 1rem;
  min-width: 250px;
  max-width: 300px;
}

#stats-panel h2 {
  font-size: 1.2rem;
  margin-bottom: 0.75rem;
  color: var(--accent-color);
  font-weight: 400;
  border-bottom: 1px solid var(--panel-border);
  padding-bottom: 0.5rem;
}

#stats-content {
  font-family: "SF Mono", "Monaco", "Inconsolata", "Fira Code", monospace;
  font-size: 0.9rem;
  line-height: 1.6;
}

#stats-content .stat-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}

#stats-content .stat-label {
  color: var(--text-dim);
}

#stats-content .stat-value {
  color: var(--text-color);
  font-weight: 500;
}

#stats-content .stat-value.warning {
  color: #ffcc00;
}

#stats-content .stat-value.critical {
  color: #ff3333;
}

#controls-panel {
  top: 1rem;
  left: 1rem;
  min-width: 200px;
}

#controls-panel label {
  display: block;
  font-size: 0.9rem;
  color: var(--text-dim);
  margin-bottom: 0.5rem;
}

#controls-panel select {
  width: 100%;
  padding: 0.5rem;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--panel-border);
  border-radius: 0.25rem;
  color: var(--text-color);
  font-size: 0.9rem;
  cursor: pointer;
  outline: none;
}

#controls-panel select:focus {
  border-color: var(--accent-color);
}

#timeline-panel {
  bottom: 1rem;
  left: 50%;
  transform: translateX(-50%);
  min-width: 600px;
  max-width: 800px;
}

#timeline-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
}

#play-btn {
  width: 2.5rem;
  height: 2.5rem;
  border: none;
  background: var(--accent-color);
  color: var(--bg-color);
  border-radius: 50%;
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s ease;
}

#play-btn:hover {
  background: #00b8e0;
}

#timeline-slider {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  outline: none;
}

#timeline-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  background: var(--accent-color);
  border-radius: 50%;
  cursor: pointer;
  transition: transform 0.1s ease;
}

#timeline-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

#timeline-slider::-moz-range-thumb {
  width: 16px;
  height: 16px;
  background: var(--accent-color);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  transition: transform 0.1s ease;
}

#timeline-slider::-moz-range-thumb:hover {
  transform: scale(1.2);
}

#time-display {
  font-family: "SF Mono", "Monaco", "Inconsolata", "Fira Code", monospace;
  font-size: 0.9rem;
  color: var(--text-color);
  min-width: 100px;
}

#speed-select {
  padding: 0.5rem;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--panel-border);
  border-radius: 0.25rem;
  color: var(--text-color);
  font-size: 0.9rem;
  cursor: pointer;
  outline: none;
}

#speed-select:focus {
  border-color: var(--accent-color);
}

@media (max-width: 768px) {
  #stats-panel {
    max-width: 200px;
    font-size: 0.8rem;
  }

  #timeline-panel {
    min-width: 90%;
    left: 5%;
    transform: none;
  }

  #drop-content h1 {
    font-size: 1.8rem;
  }

  #drop-content p {
    font-size: 1rem;
  }
}