body {
        min-height: 100vh;
        background: radial-gradient(circle at top left, #1e3a8a 0%, #0f172a 50%, #020617 100%);
        color: #e5e7eb;
        font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
        display: flex;
        flex-direction: column;
      }

      .donation-container {
        flex: 1;
        display: flex;
        align-items: flex-start;
        justify-content: center;
        padding: 40px 15px;
      }

      .donation-card {
        max-width: 900px;
        width: 100%;
        background: rgba(15, 23, 42, 0.9);
        border-radius: 18px;
        border: 1px solid rgba(148, 163, 184, 0.4);
        box-shadow: 0 30px 80px rgba(0,0,0,0.6);
        backdrop-filter: blur(18px);
        padding: 24px 24px 28px;
      }

      .donation-card h1 {
        font-size: 1.8rem;
        margin-bottom: 0.5rem;
      }

      .donation-card .lead-text {
        font-size: 0.95rem;
        color: #9ca3af;
      }

      label.form-label {
        font-weight: 500;
        font-size: 0.9rem;
      }

      .section-title {
        margin-top: 1.6rem;
        margin-bottom: 0.4rem;
        font-weight: 600;
        font-size: 1rem;
        color: #e5e7eb;
      }

      .note-box {
        background: rgba(15, 118, 110, 0.2);
        border-radius: 12px;
        padding: 12px 14px;
        font-size: 0.9rem;
        color: #d1fae5;
        border: 1px solid rgba(45, 212, 191, 0.3);
        margin-top: 1rem;
      }

      .error-summary {
        display: none;
        margin-top: 1rem;
        border-radius: 12px;
        padding: 10px 14px;
        background: rgba(220, 38, 38, 0.1);
        border: 1px solid rgba(248, 113, 113, 0.7);
        color: #fecaca;
        font-size: 0.9rem;
      }

      footer {
        text-align: center;
        padding: 12px;
        font-size: 0.8rem;
        color: #9ca3af;
      }