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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  min-height: 100vh;
  color: #fff;
  padding: 20px;
}

.container {
  max-width: 400px;
  margin: 0 auto;
  text-align: center;
}

h1 {
  font-size: 2rem;
  margin-bottom: 8px;
  background: linear-gradient(90deg, #ff6b6b, #feca57);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subtitle {
  color: #a0a0a0;
  font-size: 0.95rem;
  margin-bottom: 24px;
}

.preview-container {
  width: 100%;
  aspect-ratio: 4/3;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 16px;
  margin-bottom: 24px;
  display: none;
  overflow: hidden;
  border: 2px solid rgba(255, 255, 255, 0.1);
}

.preview-container.has-image {
  display: block;
}

.preview-container img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.buttons {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
}

.btn {
  flex: 1;
  padding: 16px 20px;
  border: none;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s, opacity 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn:active {
  transform: scale(0.96);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-primary {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #fff;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-send {
  width: 100%;
  padding: 18px;
  background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
  color: #fff;
  font-size: 1.1rem;
}

.btn-send:disabled {
  background: rgba(255, 255, 255, 0.1);
}

.icon {
  font-size: 1.2rem;
}

.status {
  margin-top: 20px;
  padding: 12px;
  border-radius: 8px;
  font-size: 0.9rem;
  display: none;
}

.status.success {
  display: block;
  background: rgba(56, 239, 125, 0.2);
  color: #38ef7d;
}

.status.error {
  display: block;
  background: rgba(255, 107, 107, 0.2);
  color: #ff6b6b;
}

.status.loading {
  display: block;
  background: rgba(102, 126, 234, 0.2);
  color: #667eea;
}

/* Prevent pull-to-refresh on mobile */
body {
  overscroll-behavior: none;
}