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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  min-height: 100vh;
  padding: 20px;
}

.container {
  max-width: 900px;
  margin: 0 auto;
}

h1 {
  color: #2c3e50;
  text-align: center;
  margin-bottom: 30px;
  font-size: clamp(24px, 5vw, 32px);
}

.controls-section {
  background: white;
  padding: 20px;
  border-radius: 12px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  margin-bottom: 20px;
}

.control-group {
  margin-bottom: 15px;
}

.control-group:last-child {
  margin-bottom: 0;
}

label {
  display: block;
  color: #34495e;
  font-weight: 500;
  margin-bottom: 8px;
  font-size: 14px;
}

select {
  width: 100%;
  padding: 12px;
  border: 2px solid #e0e0e0;
  border-radius: 8px;
  font-size: 14px;
  background: white;
  color: #2c3e50;
  cursor: pointer;
  transition: border-color 0.3s;
}

select:hover {
  border-color: #ff6b35;
}

select:focus {
  outline: none;
  border-color: #ff6b35;
}

.preview-section {
  background: white;
  padding: 20px;
  border-radius: 12px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  margin-bottom: 20px;
}

.preview-title {
  color: #34495e;
  font-weight: 600;
  margin-bottom: 15px;
  font-size: 16px;
}

.video-container {
  position: relative;
  width: 100%;
  background: #000;
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 15px;
}

video {
  width: 100%;
  height: auto;
  display: block;
}

.recording-indicator {
  position: absolute;
  top: 15px;
  left: 15px;
  background: rgba(0, 0, 0, 0.7);
  color: white;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  display: none;
  align-items: center;
  gap: 8px;
}

.recording-indicator.active {
  display: flex;
}

.rec-dot {
  width: 10px;
  height: 10px;
  background: #ff4444;
  border-radius: 50%;
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.3;
  }
}

.button-group {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

button {
  flex: 1;
  min-width: 120px;
  padding: 12px 20px;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

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

.btn-primary {
  background: #ff6b35;
  color: white;
}

.btn-primary:hover:not(:disabled) {
  background: #e55a2b;
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(255, 107, 53, 0.3);
}

.btn-danger {
  background: #e74c3c;
  color: white;
}

.btn-danger:hover:not(:disabled) {
  background: #c0392b;
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(231, 76, 60, 0.3);
}

.btn-secondary {
  background: #3498db;
  color: white;
}

.btn-secondary:hover:not(:disabled) {
  background: #2980b9;
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(52, 152, 219, 0.3);
}

.btn-success {
  background: #27ae60;
  color: white;
}

.btn-success:hover:not(:disabled) {
  background: #229954;
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(39, 174, 96, 0.3);
}

.error-message {
  background: #fee;
  color: #c33;
  padding: 12px;
  border-radius: 8px;
  margin-top: 15px;
  font-size: 14px;
  display: none;
  border-left: 4px solid #c33;
}

.error-message.show {
  display: block;
}

canvas {
  display: none;
}

.playback-section {
  background: white;
  padding: 20px;
  border-radius: 12px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  display: none;
}

.playback-section.show {
  display: block;
}

.log-section {
  background: white;
  padding: 15px;
  border-radius: 8px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  margin-bottom: 20px;
  font-family: "Courier New", monospace;
  font-size: 13px;
  color: #2c3e50;
  max-height: 150px;
  overflow-y: auto;
}

.log-entry {
  padding: 4px 0;
  border-bottom: 1px solid #f0f0f0;
}

.log-entry:last-child {
  border-bottom: none;
}

.log-entry .timestamp {
  color: #7f8c8d;
  margin-right: 8px;
}

@media (max-width: 640px) {
  body {
    padding: 10px;
  }

  .controls-section,
  .preview-section,
  .playback-section {
    padding: 15px;
  }

  button {
    min-width: 100px;
    font-size: 12px;
    padding: 10px 15px;
  }

  .recording-indicator {
    font-size: 12px;
    padding: 6px 10px;
  }
}