*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

    :root {
      --cream: #FAF7F2;
      --warm-white: #FDFCFA;
      --dark: #1C1C1A;
      --muted: #6B6860;
      --accent: #C8A96E;
      --accent-light: #EFE5D3;
      --border: #E5E0D8;
    }

    body {
      font-family: 'Calibri', 'Candara', 'Segoe UI', sans-serif;
      background: var(--cream);
      color: var(--dark);
      min-height: 100vh;
      display: flex;
      flex-direction: column;
    }

    nav {
      background: rgba(253,252,250,0.95);
      border-bottom: 1px solid var(--border);
      padding: 0 5vw;
      height: 64px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .nav-logo {
      font-family: 'Calibri', sans-serif;
      font-size: 1.2rem;
      font-weight: 600;
      color: var(--dark);
      text-decoration: none;
    }

    .nav-back {
      font-size: 0.82rem;
      color: var(--muted);
      text-decoration: none;
      letter-spacing: 0.08em;
      display: flex;
      align-items: center;
      gap: 0.4rem;
      transition: color 0.2s;
    }

    .nav-back:hover { color: var(--dark); }

    main {
      flex: 1;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 4rem 5vw;
    }

    .form-card {
      background: var(--warm-white);
      width: 100%;
      max-width: 520px;
      padding: 3.5rem 3rem;
    }

    .plan-badge {
      display: inline-block;
      font-size: 0.7rem;
      letter-spacing: 0.2em;
      text-transform: uppercase;
      color: var(--accent);
      border: 1px solid var(--accent-light);
      padding: 0.35rem 0.9rem;
      margin-bottom: 1.5rem;
    }

    h1 {
      font-size: 1.8rem;
      font-weight: 600;
      line-height: 1.2;
      margin-bottom: 0.5rem;
    }

    .plan-price {
      font-size: 2rem;
      font-weight: 300;
      color: var(--accent);
      margin-bottom: 2rem;
    }

    .divider {
      width: 40px;
      height: 1px;
      background: var(--border);
      margin-bottom: 2rem;
    }

    .form-group {
      margin-bottom: 1.4rem;
    }

    label {
      display: block;
      font-size: 0.78rem;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      color: var(--muted);
      margin-bottom: 0.5rem;
    }

    input, textarea {
      width: 100%;
      padding: 0.85rem 1rem;
      border: 1px solid var(--border);
      background: var(--cream);
      font-family: inherit;
      font-size: 1rem;
      color: var(--dark);
      outline: none;
      transition: border-color 0.2s;
    }

    input:focus, textarea:focus {
      border-color: var(--accent);
    }
    textarea {
      resize: vertical;
      min-height: 90px;
      line-height: 1.6;
    }

    input::placeholder, textarea::placeholder {
      color: #C0BBB3;
    }

    .form-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 1rem;
    }

    .submit-btn {
      width: 100%;
      margin-top: 2rem;
      padding: 1.1rem;
      background: var(--dark);
      color: var(--warm-white);
      border: none;
      font-family: inherit;
      font-size: 0.82rem;
      letter-spacing: 0.18em;
      text-transform: uppercase;
      cursor: pointer;
      transition: background 0.25s;
    }

    .submit-btn:hover { background: #333; }

    .submit-btn:disabled {
      opacity: 0.6;
      cursor: not-allowed;
    }

    .notice {
      margin-top: 1.2rem;
      font-size: 0.8rem;
      color: var(--muted);
      text-align: center;
      line-height: 1.5;
    }

    .cancelled-msg {
      background: #fff3cd;
      border: 1px solid #ffc107;
      padding: 0.8rem 1rem;
      font-size: 0.88rem;
      margin-bottom: 1.5rem;
      color: #856404;
    }

    @media (max-width: 540px) {
      .form-card { padding: 2rem 1.5rem; }
      .form-row { grid-template-columns: 1fr; }
    }

    /* Sits under the submit button: quiet, but the link must be findable. */
    .consent-note {
      margin-top: 1rem;
      font-size: 0.78rem;
      line-height: 1.6;
      color: var(--muted);
      text-align: center;
    }

    .consent-note a { color: var(--dark); }

    /* Under the two optional free-text fields. They are where someone may
       write about their health, so say plainly that they can be left empty. */
    .field-note {
      margin-top: 0.5rem;
      font-size: 0.78rem;
      line-height: 1.6;
      color: var(--muted);
    }