:root {
      --primary-color: #124874;
      --accent-color: #CF373D;
    }
    body { background-color: #f6f8fa; font-family: 'Segoe UI', Tahoma, sans-serif; }
    .upload-card {
      max-width: 520px;
      margin: 60px auto;
      padding: 30px;
      background: #fff;
      border-radius: 16px;
      box-shadow: 0 6px 20px rgba(18,72,116,0.15);
      border-top: 6px solid var(--primary-color);
      text-align: center;
    }
    video, canvas {
      width: 100%;
      border-radius: 12px;
      margin-top: 10px;
      display: none;
    }
    button {
      border: none;
      border-radius: 8px;
      padding: 12px;
      color: white;
      font-weight: 500;
      transition: 0.3s;
    }
    #startBtn { width: 100%; background-color: var(--primary-color); margin-top: 10px; }
    #captureBtn { width: 100%; background-color: var(--primary-color); display: none; margin-top: 10px; }
    #retakeBtn { background-color: #6c757d; display: none; width: 48%; }
    #uploadBtn { background-color: var(--accent-color); display: none; width: 48%; }
    .button-row {
      display: flex;
      justify-content: space-between;
      gap: 4%;
      margin-top: 10px;
    }
    button:hover { opacity: 0.9; }
    .info-box {
      text-align: left;
      margin-top: 20px;
      display: none;
    }
    .info-box strong { color: var(--primary-color); }