/* ============================================================
     TypeNova Purchase Flow — Dark Luxury
     ============================================================ */

  body {
    background:
      radial-gradient(circle at top right, rgba(0,229,200,0.08), transparent 30rem),
      radial-gradient(circle at bottom left, rgba(79,107,255,0.1), transparent 34rem),
      var(--tn-bg);
    min-height: 100vh;
  }

  /* ── Topbar ── */
  .topbar {
    padding: 0 var(--tn-space-8);
    height: 64px;
    border-bottom: 1px solid var(--tn-border-subtle);
    background: rgba(11,16,32,0.85);
    backdrop-filter: blur(16px);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: var(--tn-z-nav);
  }
  .logo {
    display: flex;
    align-items: center;
    gap: var(--tn-space-2);
    font-family: var(--tn-font-heading);
    font-weight: 800;
    font-size: 1.2rem;
    color: var(--tn-text-on-dark);
    text-decoration: none;
  }
  .logo-mark {
    width: 30px; height: 30px;
    background: var(--tn-grad-primary);
    border-radius: var(--tn-radius-sm);
    display: flex; align-items: center; justify-content: center;
    font-size: 0.95rem; font-weight: 900; color: #fff;
  }
  .helper-link {
    color: var(--tn-text-muted);
    font-size: var(--tn-text-sm);
    text-decoration: none;
    transition: color var(--tn-dur-fast);
  }
  .helper-link:hover { color: var(--tn-text-sub); }

  /* ── Main ── */
  main {
    max-width: 960px;
    margin: 48px auto;
    padding: 0 24px;
  }

  /* ── Progress Steps ── */
  .progress {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-bottom: 40px;
  }
  .progress .step {
    padding: 14px 16px;
    border-radius: var(--tn-radius-md);
    background: var(--tn-grad-card);
    border: 1px solid var(--tn-border-subtle);
    font-size: var(--tn-text-sm);
    color: var(--tn-text-muted);
    display: flex;
    align-items: center;
    gap: 10px;
    transition: all var(--tn-dur-normal) var(--tn-ease-out);
  }
  .progress .step .num {
    width: 26px; height: 26px;
    border-radius: 50%;
    background: var(--tn-surface-3);
    color: var(--tn-text-muted);
    display: grid;
    place-items: center;
    font-family: var(--tn-font-mono);
    font-weight: 700;
    font-size: 0.8rem;
    flex-shrink: 0;
  }
  .progress .step.active {
    background: linear-gradient(135deg, rgba(79,107,255,0.15), rgba(79,107,255,0.05));
    border-color: var(--tn-primary);
    color: var(--tn-text-on-dark);
    box-shadow: 0 0 24px rgba(79,107,255,0.15);
  }
  .progress .step.active .num {
    background: var(--tn-grad-primary);
    color: #fff;
  }
  .progress .step.done { border-color: rgba(46,232,154,0.3); }
  .progress .step.done .num {
    background: rgba(46,232,154,0.2);
    color: var(--tn-success);
  }

  /* ── Card ── */
  .card {
    background: var(--tn-grad-card);
    border: 1px solid var(--tn-border);
    border-radius: var(--tn-radius-xl);
    padding: 40px;
    box-shadow: var(--tn-shadow-md);
  }
  h1.step-title {
    font-family: var(--tn-font-heading);
    font-size: var(--tn-text-2xl);
    font-weight: 800;
    color: var(--tn-text-on-dark);
    margin-bottom: 8px;
    letter-spacing: -0.02em;
  }
  p.step-sub {
    color: var(--tn-text-sub);
    margin-bottom: 32px;
    font-size: var(--tn-text-sm);
    line-height: 1.6;
  }

  /* ── Plan Cards ── */
  .plans {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
    margin-bottom: 32px;
  }
  @media (max-width: 980px) { .plans { grid-template-columns: repeat(2, 1fr); } }
  @media (max-width: 720px) { .plans { grid-template-columns: 1fr; } }
  .plan {
    position: relative;
    border: 1.5px solid var(--tn-border-subtle);
    border-radius: var(--tn-radius-lg);
    padding: 22px 20px;
    cursor: pointer;
    transition: all var(--tn-dur-normal) var(--tn-ease-out);
    background: rgba(11,16,32,0.3);
  }
  .plan:hover { border-color: var(--tn-border); background: rgba(79,107,255,0.05); }
  .plan.selected {
    border-color: var(--tn-primary);
    background: rgba(79,107,255,0.1);
    box-shadow: 0 0 20px rgba(79,107,255,0.15);
  }
  .plan.plan-disabled {
    cursor: not-allowed;
    opacity: 0.56;
    background: rgba(11,16,32,0.16);
  }
  .plan.plan-disabled:hover {
    border-color: var(--tn-border-subtle);
    background: rgba(11,16,32,0.16);
  }
  .plan input { position: absolute; opacity: 0; pointer-events: none; }
  .plan .badge {
    position: absolute;
    top: -11px;
    right: 14px;
    background: var(--tn-grad-primary);
    color: white;
    font-family: var(--tn-font-heading);
    font-size: 0.68rem;
    font-weight: 700;
    padding: 4px 12px;
    border-radius: var(--tn-radius-full);
    letter-spacing: 0.05em;
  }
  .plan .pname {
    font-family: var(--tn-font-heading);
    font-weight: 700;
    font-size: var(--tn-text-md);
    color: var(--tn-text-on-dark);
    margin-bottom: 4px;
  }
  .plan .pprice {
    font-family: var(--tn-font-heading);
    font-weight: 900;
    font-size: 1.6rem;
    color: var(--tn-primary-light);
    margin-bottom: 10px;
    letter-spacing: -0.02em;
  }
  .plan .pprice small {
    font-weight: 500;
    font-size: var(--tn-text-sm);
    color: var(--tn-text-muted);
  }
  .plan .pdesc {
    color: var(--tn-text-sub);
    font-size: var(--tn-text-sm);
    line-height: 1.65;
  }

  /* ── Included features ── */
  .included-features {
    border-top: 1px solid var(--tn-border-subtle);
    padding-top: 24px;
  }
  .included-features h3 {
    font-family: var(--tn-font-heading);
    font-size: var(--tn-text-xs);
    font-weight: 700;
    margin-bottom: 14px;
    color: var(--tn-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
  }
  .included-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
  }
  .included-item {
    min-height: 84px;
    padding: 14px 16px;
    border: 1px solid var(--tn-border-subtle);
    border-radius: var(--tn-radius-md);
    background: rgba(11,16,32,0.2);
  }
  .included-k,
  .included-v {
    display: block;
  }
  .included-k {
    font-family: var(--tn-font-heading);
    color: var(--tn-primary-light);
    font-size: var(--tn-text-xs);
    font-weight: 700;
    letter-spacing: 0.06em;
    margin-bottom: 8px;
  }
  .included-v {
    font-size: var(--tn-text-sm);
    color: var(--tn-text-sub);
    line-height: 1.55;
  }
  @media (max-width: 720px) { .included-grid { grid-template-columns: 1fr; } }

  /* ── Total bar ── */
  .total-bar {
    margin-top: 28px;
    padding: 20px 24px;
    background: linear-gradient(135deg, var(--tn-primary) 0%, var(--tn-primary-dark) 100%);
    border-radius: var(--tn-radius-lg);
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 8px 28px rgba(79,107,255,0.4);
  }
  .total-bar .label {
    font-family: var(--tn-font-heading);
    font-size: var(--tn-text-sm);
    opacity: 0.85;
  }
  .total-bar .amount {
    font-family: var(--tn-font-heading);
    font-size: 1.8rem;
    font-weight: 900;
    letter-spacing: -0.03em;
  }
  .total-bar .amount small {
    font-size: var(--tn-text-sm);
    font-weight: 500;
    opacity: 0.8;
  }
  .trial-note {
    margin: 12px 2px 0;
    color: var(--tn-text-muted);
    font-size: var(--tn-text-xs);
    line-height: 1.7;
  }

  /* ── Form ── */
  .field { margin-bottom: 22px; }
  .field label {
    display: block;
    font-family: var(--tn-font-heading);
    font-size: var(--tn-text-xs);
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--tn-text-sub);
    letter-spacing: 0.04em;
  }
  .field input[type=text],
  .field input[type=email],
  .field input[type=password] {
    width: 100%;
    padding: 13px 16px;
    background: rgba(11,16,32,0.5);
    border: 1.5px solid var(--tn-border);
    border-radius: var(--tn-radius-md);
    color: var(--tn-text);
    font-size: var(--tn-text-base);
    font-family: var(--tn-font-body);
    outline: none;
    transition: border-color var(--tn-dur-fast), box-shadow var(--tn-dur-fast);
  }
  .field input::placeholder { color: var(--tn-text-muted); }
  .field input:focus {
    border-color: var(--tn-primary);
    box-shadow: 0 0 0 3px rgba(79,107,255,0.2);
  }
  .field .hint {
    font-size: var(--tn-text-xs);
    color: var(--tn-text-muted);
    margin-top: 6px;
  }
  .field .hint.error { color: var(--tn-danger); }
  .field .hint.ok { color: var(--tn-success); }
  .flow-error {
    display: none;
    margin-bottom: 20px;
    padding: 14px 18px;
    border: 1px solid rgba(255,92,107,0.35);
    border-radius: var(--tn-radius-md);
    background: rgba(255,92,107,0.1);
    color: #FF8A95;
    font-size: var(--tn-text-sm);
    line-height: 1.6;
  }
  .flow-error.show { display: block; }

  .url-preview {
    margin-top: 10px;
    padding: 12px 16px;
    background: rgba(11,16,32,0.4);
    border: 1px solid var(--tn-border-subtle);
    border-radius: var(--tn-radius-md);
    font-family: var(--tn-font-mono);
    font-size: 0.82rem;
    color: var(--tn-primary-light);
  }

  /* ── Themes ── */
  .themes {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
  }
  .theme-card {
    cursor: pointer;
    border: 1.5px solid var(--tn-border-subtle);
    border-radius: var(--tn-radius-md);
    padding: 16px;
    text-align: center;
    transition: all var(--tn-dur-fast);
    background: rgba(11,16,32,0.3);
  }
  .theme-card.selected {
    border-color: var(--tn-primary);
    background: rgba(79,107,255,0.08);
    box-shadow: 0 0 16px rgba(79,107,255,0.15);
  }
  .theme-card input { display: none; }
  .theme-swatch {
    height: 56px;
    border-radius: var(--tn-radius-sm);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
  }
  .theme-standard { background: linear-gradient(135deg, #0B1020 0%, #1A2244 100%); border: 1px solid rgba(79,107,255,0.3); }
  .theme-kids     { background: linear-gradient(135deg, #ffd166 0%, #ef476f 50%, #06d6a0 100%); }
  .theme-senior   { background: linear-gradient(135deg, #1a365d 0%, #2c5282 50%, #2b6cb0 100%); }
  .theme-card .tname {
    font-family: var(--tn-font-heading);
    font-weight: 700;
    font-size: var(--tn-text-sm);
    color: var(--tn-text-on-dark);
  }
  .theme-card .tdesc {
    font-size: var(--tn-text-xs);
    color: var(--tn-text-muted);
    margin-top: 3px;
  }
  .theme-card .trank {
    display: inline-block;
    margin-top: 6px;
    font-size: var(--tn-text-xs);
    font-family: var(--tn-font-mono);
    font-weight: 600;
    color: var(--tn-primary-light);
    background: rgba(79,107,255,0.12);
    border-radius: var(--tn-radius-full);
    padding: 2px 10px;
  }
  .theme-card .tfeatures {
    margin-top: 10px;
    color: var(--tn-text-sub);
    font-size: 0.72rem;
    line-height: 1.6;
  }
  .theme-note {
    margin-top: 12px;
    color: var(--tn-text-muted);
    font-size: var(--tn-text-xs);
    line-height: 1.7;
  }

  /* ── Summary box ── */
  .summary-box {
    background: rgba(11,16,32,0.4);
    border: 1px solid var(--tn-border-subtle);
    border-radius: var(--tn-radius-lg);
    padding: 20px;
    margin-bottom: 24px;
  }
  .summary-box .row {
    display: flex;
    justify-content: space-between;
    padding: 7px 0;
    font-size: var(--tn-text-sm);
    border-bottom: 1px solid var(--tn-border-subtle);
  }
  .summary-box .row:last-child { border-bottom: none; }
  .summary-box .row .k { color: var(--tn-text-muted); }
  .summary-box .row .v { font-weight: 600; color: var(--tn-text-on-dark); }

  /* ── Agree ── */
  .agree {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-top: 20px;
    font-size: var(--tn-text-sm);
    color: var(--tn-text-sub);
  }
  .agree input {
    margin-top: 3px;
    accent-color: var(--tn-primary);
    width: 16px; height: 16px;
  }
  .agree a { color: var(--tn-primary-light); text-decoration: underline; text-underline-offset: 3px; }

  /* ── Buttons ── */
  .actions {
    display: flex;
    justify-content: space-between;
    margin-top: 32px;
    gap: 12px;
  }
  button.btn {
    padding: 14px 28px;
    border-radius: var(--tn-radius-md);
    font-family: var(--tn-font-heading);
    font-weight: 700;
    font-size: var(--tn-text-base);
    cursor: pointer;
    border: none;
    transition: all var(--tn-dur-normal) var(--tn-ease-out);
  }
  button.btn-primary {
    background: var(--tn-grad-primary);
    color: white;
    box-shadow: 0 6px 20px rgba(79,107,255,0.4);
  }
  button.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 10px 28px rgba(79,107,255,0.55);
  }
  button.btn-primary:disabled {
    opacity: 0.35;
    cursor: not-allowed;
    box-shadow: none;
  }
  button.btn-ghost {
    background: transparent;
    color: var(--tn-text-muted);
    border: 1.5px solid var(--tn-border-subtle);
  }
  button.btn-ghost:hover { color: var(--tn-text-sub); border-color: var(--tn-border); }

  .hidden { display: none !important; }

  .spinner {
    display: inline-block;
    width: 16px; height: 16px;
    border: 2.5px solid rgba(255,255,255,0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    vertical-align: middle;
    margin-right: 6px;
  }
  @keyframes spin { to { transform: rotate(360deg); } }

  @media (max-width: 640px) {
    main { margin: 32px auto; }
    .card { padding: 24px 20px; }
    .topbar { padding: 0 var(--tn-space-4); }
    .progress { grid-template-columns: 1fr; }
    .themes { grid-template-columns: 1fr; }
  }