:root {
      --bg: #f3f7f7;
      --ink: #122127;
      --muted: #5d6b70;
      --brand: #0e8f83;
      --brand-strong: #096b62;
      --accent: #ee7f3b;
      --line: rgba(18, 33, 39, 0.1);
      --shadow: 0 20px 45px rgba(9, 41, 49, 0.12);
      --card: #ffffff;
      --danger: #c0392b;
    }

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

    body {
      font-family: 'Manrope', sans-serif;
      color: var(--ink);
      background:
        radial-gradient(circle at 10% 0%, rgba(14, 143, 131, 0.14), transparent 28%),
        radial-gradient(circle at 96% 12%, rgba(238, 127, 59, 0.14), transparent 22%),
        linear-gradient(180deg, #f8fbfb 0%, var(--bg) 75%);
      min-height: 100vh;
      overflow-x: hidden;
    }

    .shell { width: min(1180px, 94%); margin: 0 auto; }

    header {
      position: sticky;
      top: 0;
      z-index: 20;
      backdrop-filter: blur(8px);
      background: rgba(248, 251, 251, 0.82);
      border-bottom: 1px solid var(--line);
    }

    .topbar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      padding: 16px 0;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      text-decoration: none;
      color: var(--ink);
      font-family: 'Sora', sans-serif;
      font-weight: 700;
    }

    .brand-badge {
      width: 34px;
      height: 34px;
      border-radius: 10px;
      display: grid;
      place-items: center;
      background: linear-gradient(145deg, var(--brand), #0fb8a9);
      color: #fff;
      font-weight: 800;
    }

    nav {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 10px;
    }

    nav a {
      text-decoration: none;
      color: var(--ink);
      padding: 9px 13px;
      border-radius: 999px;
      font-size: 0.95rem;
      font-weight: 600;
      transition: background 0.2s ease, color 0.2s ease;
    }

    nav a:hover,
    nav a.active {
      background: rgba(14, 143, 131, 0.13);
      color: var(--brand-strong);
    }

    main { padding: 42px 0 68px; }

    .hero {
      border: 1px solid var(--line);
      border-radius: 24px;
      background: linear-gradient(180deg, #ffffff, #f7fbfb);
      box-shadow: var(--shadow);
      padding: 24px;
      margin-bottom: 18px;
    }

    .pill {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 7px 12px;
      border-radius: 999px;
      border: 1px solid rgba(14, 143, 131, 0.26);
      color: var(--brand-strong);
      background: rgba(14, 143, 131, 0.08);
      font-weight: 700;
      font-size: 0.84rem;
      margin-bottom: 12px;
    }

    h1, h2, h3 { font-family: 'Sora', sans-serif; }

    h1 {
      font-size: clamp(1.8rem, 3vw, 2.35rem);
      margin-bottom: 8px;
    }

    .hero p {
      color: var(--muted);
      line-height: 1.7;
      max-width: 72ch;
    }

    .layout {
      display: grid;
      grid-template-columns: minmax(0, 1.3fr) minmax(320px, 0.9fr);
      gap: 16px;
      align-items: start;
      min-width: 0;
    }

    .panel {
      border: 1px solid var(--line);
      border-radius: 22px;
      background: linear-gradient(180deg, #ffffff, #f7fbfb);
      box-shadow: var(--shadow);
      padding: 22px;
      min-width: 0;
    }

    .panel h2 {
      font-size: 1.2rem;
      margin-bottom: 6px;
    }

    .panel-intro {
      color: var(--muted);
      line-height: 1.6;
      margin-bottom: 18px;
    }

    .step-row {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 10px;
      margin-top: 18px;
    }

    .step {
      border: 1px solid var(--line);
      border-radius: 14px;
      padding: 12px;
      background: #fff;
    }

    .step strong {
      display: block;
      font-size: 0.84rem;
      text-transform: uppercase;
      color: var(--brand-strong);
      margin-bottom: 4px;
      letter-spacing: 0.3px;
    }

    .step span {
      font-size: 0.9rem;
      color: var(--muted);
      line-height: 1.45;
    }

    .grid-2 {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
    }

    .field {
      display: grid;
      gap: 6px;
      margin-bottom: 14px;
    }

    label {
      font-size: 0.9rem;
      font-weight: 700;
      color: #1f3840;
    }

    input, select {
      width: 100%;
      border: 1px solid var(--line);
      border-radius: 11px;
      padding: 12px 13px;
      font-size: 0.95rem;
      font-family: 'Manrope', sans-serif;
      background: #fff;
      outline: none;
      transition: border-color 0.2s ease, box-shadow 0.2s ease;
    }

    input:focus,
    select:focus {
      border-color: rgba(14, 143, 131, 0.55);
      box-shadow: 0 0 0 4px rgba(14, 143, 131, 0.14);
    }

    .helper {
      color: var(--muted);
      font-size: 0.82rem;
      line-height: 1.45;
      margin-top: -4px;
      margin-bottom: 10px;
    }

    .summary {
      position: sticky;
      top: 92px;
      display: grid;
      gap: 14px;
    }

    .summary-card {
      border: 1px solid var(--line);
      border-radius: 22px;
      background: linear-gradient(180deg, #ffffff, #f7fbfb);
      box-shadow: var(--shadow);
      padding: 20px;
      min-width: 0;
    }

    .plan-chip {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      border-radius: 999px;
      padding: 6px 11px;
      font-weight: 800;
      font-size: 0.78rem;
      background: rgba(14, 143, 131, 0.12);
      color: var(--brand-strong);
      margin-bottom: 12px;
    }

    .plan-price {
      display: flex;
      align-items: baseline;
      gap: 8px;
      margin-bottom: 8px;
    }

    .plan-price strong {
      font-family: 'Sora', sans-serif;
      font-size: 2rem;
    }

    .plan-price span,
    .muted {
      color: var(--muted);
    }

    .summary-list {
      list-style: none;
      display: grid;
      gap: 10px;
      margin-top: 14px;
    }

    .summary-list li {
      padding-left: 18px;
      position: relative;
      color: #234047;
      line-height: 1.45;
      font-size: 0.9rem;
    }

    .summary-list li::before {
      content: '✓';
      position: absolute;
      left: 0;
      color: var(--brand);
      font-weight: 800;
    }

    .price-breakdown {
      margin-top: 16px;
      border-top: 1px solid var(--line);
      padding-top: 14px;
      display: grid;
      gap: 10px;
    }

    .price-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 12px;
      font-size: 0.92rem;
    }

    .price-row.total {
      font-size: 1rem;
      font-weight: 800;
      color: #17343c;
    }

    .secure-box {
      border-radius: 16px;
      border: 1px dashed rgba(14, 143, 131, 0.35);
      background: rgba(14, 143, 131, 0.07);
      padding: 14px;
      color: #0f5f55;
      font-size: 0.88rem;
      line-height: 1.5;
    }

    .form-feedback {
      display: none;
      border-radius: 10px;
      padding: 10px 12px;
      margin-bottom: 14px;
      font-size: 0.88rem;
      line-height: 1.45;
    }

    .form-feedback.error {
      display: block;
      color: #8b3a18;
      background: rgba(238, 127, 59, 0.16);
      border: 1px solid rgba(238, 127, 59, 0.38);
    }

    .form-feedback.success {
      display: block;
      color: #0f5f55;
      background: rgba(14, 143, 131, 0.14);
      border: 1px solid rgba(14, 143, 131, 0.38);
    }

    .btn-row {
      display: flex;
      gap: 10px;
      flex-wrap: wrap;
      margin-top: 10px;
    }

    .btn {
      border: 0;
      text-decoration: none;
      padding: 13px 18px;
      border-radius: 11px;
      font-weight: 800;
      font-size: 0.95rem;
      cursor: pointer;
      transition: transform 0.2s ease, box-shadow 0.2s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }

    .btn:hover { transform: translateY(-2px); }

    .btn-main {
      color: #fff;
      background: linear-gradient(135deg, var(--brand), #0cac9c);
      box-shadow: 0 12px 26px rgba(14, 143, 131, 0.25);
      width: 100%;
    }

    .btn-soft {
      color: var(--brand-strong);
      background: rgba(14, 143, 131, 0.1);
      border: 1px solid rgba(14, 143, 131, 0.25);
      width: 100%;
    }

    .reveal-section {
      opacity: 0;
      transform: translateY(16px);
      transition: opacity 0.55s ease, transform 0.55s ease;
    }

    .reveal-section.visible {
      opacity: 1;
      transform: translateY(0);
    }

    @media (max-width: 980px) {
      .layout { grid-template-columns: 1fr; }
      .summary { position: static; }
    }

    @media (max-width: 760px) {
      .topbar { align-items: flex-start; flex-direction: column; }
      nav { width: 100%; flex-wrap: nowrap; overflow-x: auto; -webkit-overflow-scrolling: touch; }
      nav a { white-space: nowrap; flex: 0 0 auto; }
      .grid-2,
      .step-row { grid-template-columns: 1fr; }
      .shell { width: min(100%, calc(100% - 20px)); }
      .hero,
      .panel,
      .summary-card { padding: 16px; }
      .btn-row { flex-direction: column; }
    }

    @media (max-width: 420px) {
      main { padding: 24px 0 40px; }
      .hero,
      .panel,
      .summary-card { padding: 12px; border-radius: 16px; }
      .plan-price strong { font-size: 1.6rem; }
      .price-row {
        align-items: flex-start;
        flex-direction: column;
      }
    }
  
.checkout-title {
  margin-top: 10px;
}

.checkout-subtitle {
  margin-bottom: 8px;
}