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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: #1a1a2e;
  color: #e0e0e0;
  min-height: 100vh;
  padding: 2rem;
}

#app {
  max-width: 1200px;
  margin: 0 auto;
}

header {
  margin-bottom: 2rem;
}

h1 {
  font-size: 1.8rem;
  color: #fff;
}

h2 {
  font-size: 1.2rem;
  color: #ccc;
  margin-bottom: 0.75rem;
}

.subtitle {
  color: #888;
  margin-top: 0.25rem;
}

.small {
  font-size: 0.85rem;
  color: #888;
}

section {
  margin-bottom: 2rem;
}

/* Drop Zone */
#drop-zone {
  border: 2px dashed #444;
  border-radius: 12px;
  padding: 3rem 2rem;
  text-align: center;
  transition: border-color 0.2s, background 0.2s;
  cursor: pointer;
}

#drop-zone.dragover {
  border-color: #4fc3f7;
  background: rgba(79, 195, 247, 0.05);
}

#drop-zone p {
  margin: 0.5rem 0;
}

.file-btn {
  display: inline-block;
  padding: 0.6rem 1.5rem;
  background: #4fc3f7;
  color: #1a1a2e;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 600;
  transition: background 0.2s;
}

.file-btn:hover {
  background: #81d4fa;
}

/* Progress */
.progress-container {
  margin: 1rem 0;
}

.progress-bar {
  width: 100%;
  height: 8px;
  background: #333;
  border-radius: 4px;
  overflow: hidden;
  margin: 0.5rem 0;
}

.progress-fill {
  height: 100%;
  background: #4fc3f7;
  border-radius: 4px;
  width: 0%;
  transition: width 0.2s;
}

/* File List */
#file-list {
  list-style: none;
}

#file-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  background: #16213e;
  border-radius: 8px;
  margin-bottom: 0.5rem;
}

#file-list .file-info {
  flex: 1;
}

#file-list .file-name {
  font-weight: 600;
}

#file-list .file-size {
  font-size: 0.85rem;
  color: #888;
  margin-left: 0.5rem;
}

#file-list button {
  margin-left: 0.5rem;
}

button {
  padding: 0.4rem 1rem;
  background: #4fc3f7;
  color: #1a1a2e;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.85rem;
  transition: background 0.2s;
}

button:hover {
  background: #81d4fa;
}

button.danger {
  background: #ef5350;
  color: #fff;
}

button.danger:hover {
  background: #f44336;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Waveform */
#waveform-container {
  position: relative;
  background: #0f3460;
  border-radius: 8px;
  overflow-x: auto;
  overflow-y: hidden;
  height: 200px;
}

#waveform-canvas {
  display: block;
  height: 200px;
}

.cursor {
  position: absolute;
  top: 0;
  left: 0;
  width: 2px;
  height: 100%;
  background: #ff6b6b;
  pointer-events: none;
  display: none;
}

#waveform-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 0.75rem;
  flex-wrap: wrap;
}

#time-display {
  font-family: monospace;
  font-size: 0.95rem;
}

.zoom-controls {
  display: flex;
  gap: 0.25rem;
  margin-left: auto;
}

.zoom-controls button {
  padding: 0.3rem 0.6rem;
  font-size: 1rem;
}

/* Log */
#log {
  background: #0a0a1a;
  border-radius: 8px;
  padding: 1rem;
  font-family: monospace;
  font-size: 0.8rem;
  max-height: 200px;
  overflow-y: auto;
  line-height: 1.6;
}

#log .log-entry {
  border-bottom: 1px solid #1a1a2e;
  padding: 2px 0;
}

#log .log-entry.error {
  color: #ef5350;
}

#log .log-entry.warn {
  color: #ffa726;
}

#log .log-entry.success {
  color: #66bb6a;
}