.upload-container {
      max-width: 680px;
      margin: 2rem auto 4rem;
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-xl);
      padding: 2.5rem;
      box-shadow: var(--shadow-md);
    }
    .dropzone {
      border: 2px dashed var(--primary);
      border-radius: var(--radius-lg);
      padding: 3rem 1.5rem;
      text-align: center;
      background: var(--surface-alt);
      cursor: pointer;
      transition: all 0.2s;
      margin-bottom: 1.5rem;
    }
    .dropzone:hover, .dropzone.dragover {
      background: var(--primary-light);
      border-color: var(--primary);
    }
    .form-group {
      margin-bottom: 1.25rem;
    }
    .form-label {
      display: block;
      font-weight: 600;
      margin-bottom: 0.4rem;
      color: var(--text-main);
      font-size: 0.95rem;
    }
    .form-input, .form-select {
      width: 100%;
      padding: 0.75rem 1rem;
      border: 1.5px solid var(--border);
      border-radius: var(--radius-md);
      font-size: 0.95rem;
      outline: none;
      background: var(--bg-main);
      color: var(--text-main);
    }
    .form-input:focus, .form-select:focus {
      border-color: var(--primary);
    }
    .submit-btn {
      width: 100%;
      padding: 0.85rem;
      background: var(--primary);
      color: #fff;
      font-size: 1.05rem;
      font-weight: 700;
      border: none;
      border-radius: var(--radius-md);
      cursor: pointer;
      transition: all 0.2s;
      margin-top: 0.5rem;
    }
    .submit-btn:hover {
      background: #4338ca;
      transform: translateY(-1px);
    }