:root {
      --gold: #FFD700;
      --bg: #000;
      --text: #fff;
      --grey: #1a1a1a;
      --card: #111;
      --border: #333;
    }
    [data-theme="light"] {
      --bg: #fff;
      --text: #001F3F;
      --grey: #f4f4f4;
      --card: #fff;
      --border: #e0e0e0;
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: system-ui, sans-serif;
      background: var(--bg);
      color: var(--text);
      min-height: 100vh;
      display: flex;
      flex-direction: column;
    }
    header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 16px;
      border-bottom: 2px solid var(--gold);
      position: sticky;
      top: 0;
      background: var(--bg);
      z-index: 50;
    }
    header img { height: 32px; }
    .icon-btn {
      background: none;
      border: none;
      font-size: 20px;
      color: var(--text);
      cursor: pointer;
      padding: 6px;
    }
    main {
      flex: 1;
      padding: 20px 16px;
      max-width: 700px;
      margin: 0 auto;
      width: 100%;
    }
    h1 { font-size: 1.5rem; margin-bottom: 8px; }
    .subtitle { font-size: 0.9rem; opacity: 0.75; margin-bottom: 20px; }
    .card {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: 14px;
      padding: 18px;
      margin-bottom: 16px;
    }
    .card h3 { color: var(--gold); margin-bottom: 14px; font-size: 1.05rem; }
    label { display: block; font-size: 0.85rem; margin-bottom: 4px; opacity: 0.85; }
    input, select, textarea {
      width: 100%;
      padding: 12px 14px;
      border-radius: 9px;
      border: 1px solid var(--border);
      background: var(--grey);
      color: var(--text);
      font-size: 15px;
      margin-bottom: 12px;
    }
    textarea { min-height: 80px; resize: vertical; }
    .row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
    @media (max-width: 500px) { .row { grid-template-columns: 1fr; } }
    .payment-option {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 12px;
      border: 1px solid var(--border);
      border-radius: 10px;
      margin-bottom: 8px;
      cursor: pointer;
    }
    .payment-option.selected {
      border-color: var(--gold);
      background: rgba(255,215,0,0.08);
    }
    .payment-option input { width: auto; margin: 0; }
    .summary-row {
      display: flex;
      justify-content: space-between;
      margin-bottom: 8px;
      font-size: 15px;
    }
    .summary-row.total {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--gold);
      border-top: 1px solid var(--border);
      padding-top: 12px;
      margin-top: 12px;
    }
    button[type="submit"] {
      width: 100%;
      padding: 15px;
      background: var(--gold);
      color: #000;
      border: none;
      border-radius: 10px;
      font-weight: 700;
      font-size: 16px;
      cursor: pointer;
    }
    button[type="submit"]:disabled { opacity: 0.6; cursor: not-allowed; }
    .empty { text-align: center; padding: 50px 20px; }
    .empty a {
      display: inline-block;
      margin-top: 16px;
      padding: 12px 24px;
      background: var(--gold);
      color: #000;
      text-decoration: none;
      border-radius: 10px;
      font-weight: 600;
    }
    #bankDetails {
      display: none;
      background: var(--grey);
      border-radius: 10px;
      padding: 14px;
      margin-top: 12px;
      font-size: 14px;
      line-height: 1.6;
    }
    #msg { margin-top: 12px; text-align: center; font-size: 14px; }
    .error { color: #e74c3c; }
    .success { color: #27ae60; }
    footer {
      text-align: center;
      padding: 18px;
      font-size: 13px;
      border-top: 1px solid var(--border);
    }