body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
      background: #f4f5f7;
      margin: 0;
      padding: 0;
      display: flex;
      min-height: 100vh;
      align-items: center;
      justify-content: center;
    }
    .card {
      background: #ffffff;
      padding: 2rem;
      border-radius: 1rem;
      box-shadow: 0 10px 25px rgba(0,0,0,0.08);
      max-width: 480px;
      width: 100%;
    }
    h1 {
      font-size: 1.5rem;
      margin-top: 0;
      margin-bottom: 0.5rem;
    }
    p {
      margin-top: 0;
      color: #555;
      font-size: 0.95rem;
      margin-bottom: 1.5rem;
    }
    label {
      display: block;
      font-weight: 600;
      margin-bottom: 0.3rem;
    }
    input[type="file"],
    textarea {
      display: block;
      width: 100%;
      margin-bottom: 1rem;
      font-size: 0.95rem;
      font-family: inherit;
      box-sizing: border-box;
    }
    textarea {
      min-height: 70px;
      resize: vertical;
      padding: 0.4rem 0.5rem;
    }
    button {
      border: none;
      border-radius: 999px;
      padding: 0.6rem 1.4rem;
      font-size: 0.95rem;
      font-weight: 600;
      cursor: pointer;
      background: #4caf50;
      color: #fff;
      display: inline-flex;
      align-items: center;
      gap: 0.4rem;
    }
    button[disabled] {
      opacity: 0.6;
      cursor: default;
    }
    .status {
      margin-top: 1rem;
      font-size: 0.9rem;
      min-height: 1.1rem;
    }
    .status.ok {
      color: #2e7d32;
    }
    .status.error {
      color: #c62828;
    }