.checkout-page {
    position: relative;
  }
  
  /* ---------- hero ---------- */
  .tc-hero {
    position: relative;
    padding: 150px 0 40px;
    text-align: center;
    overflow: hidden;
  }
  .tc-hero::before {
    content: "";
    position: absolute;
    top: -300px;
    left: 50%;
    transform: translateX(-50%);
    width: 900px;
    height: 620px;
    max-width: 140vw;
    background: radial-gradient(
      closest-side,
      rgba(130, 80, 255, 0.38),
      rgba(255, 80, 170, 0.08) 65%,
      transparent 78%
    );
    filter: blur(30px);
    pointer-events: none;
  }
  .tc-hero .container {
    position: relative;
  }
  .tc-hero__title {
    position: relative;
    display: inline-block;
    margin: 0;
    font-family: var(--font-head);
    font-weight: 500;
    font-size: clamp(2.4rem, 6vw, 4.4rem);
    letter-spacing: -0.03em;
    line-height: 1.1;
  }
  .tc-hero__text {
    background: var(--grad);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
  
  /* ---------- layout ---------- */
  .luxe-container {
    width: 100%;
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 16px 90px;
  }
  .checkout-wrapper {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 410px;
    gap: 1.6rem;
    align-items: start;
  }
  #checkout-main {
    display: grid;
    gap: 1.2rem;
    min-width: 0;
  }
  .checkout-form-col {
    display: grid;
    gap: 1.2rem;
    min-width: 0;
    align-content: start;
  }
  @media (max-width: 991px) {
    .checkout-wrapper {
      grid-template-columns: 1fr;
    }
  }
  
  /* ---------- step indicator ---------- */
  .checkout-steps {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.7rem;
    padding: 0.55rem 1.1rem;
    width: fit-content;
    max-width: 100%;
    border: 1px solid var(--line-2);
    border-radius: 999px;
    background: rgba(120, 90, 255, 0.1);
    backdrop-filter: blur(10px);
    font-size: 0.78rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    color: var(--muted);
  }
  .checkout-steps span {
    transition: color 0.25s;
  }
  .checkout-steps .active {
    padding: 0.2rem 0.85rem;
    border-radius: 999px;
    color: #fff;
    background: var(--grad-v);
    box-shadow: 0 6px 22px -8px rgba(150, 80, 255, 0.8);
  }
  
  /* ---------- sections (cards) ---------- */
  .checkout-section {
    position: relative;
    padding: clamp(1.3rem, 3vw, 2rem);
    border: 1px solid var(--line);
    border-radius: 26px;
    background: linear-gradient(180deg, var(--card-2), var(--card));
    overflow: hidden;
    transition: border-color 0.35s;
  }
  .checkout-section::after {
    content: "";
    position: absolute;
    top: -130px;
    right: -130px;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: radial-gradient(
      closest-side,
      rgba(130, 80, 255, 0.16),
      transparent 70%
    );
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.5s;
  }
  .checkout-section:hover,
  .checkout-section:focus-within {
    border-color: var(--line-2);
  }
  .checkout-section:hover::after,
  .checkout-section:focus-within::after {
    opacity: 1;
  }
  .checkout-section > * {
    position: relative;
    z-index: 1;
  }
  .checkout-title {
    margin: 0 0 1.3rem;
    font-family: var(--font-head);
    font-size: clamp(1.25rem, 2.4vw, 1.6rem);
    font-weight: 500;
    letter-spacing: -0.02em;
    color: #cfc9ff;
  }
  h3.checkout-title {
    font-size: 1.15rem;
  }
  
  /* ---------- form fields ---------- */
  .tc-checkout .form-group {
    margin-bottom: 1rem;
    position: relative;
  }
  .tc-checkout .row {
    --bs-gutter-x: 1rem;
  }
  .tc-checkout label {
    display: block;
    margin-bottom: 0.4rem;
    font-size: 0.86rem;
    font-weight: 500;
    color: #d3d1ff;
  }
  .tc-checkout input[type="text"],
  .tc-checkout input[type="email"],
  .tc-checkout input[type="tel"],
  .tc-checkout input[type="number"],
  .tc-checkout select {
    display: block;
    width: 100%;
    padding: 0.85rem 1.1rem;
    border: 1px solid var(--line-2);
    border-radius: 14px;
    background-color: rgba(140, 100, 255, 0.07);
    color: #fff;
    font-family: var(--font-body);
    font-size: 0.95rem;
    line-height: 1.4;
    outline: 0;
    transition:
      border-color 0.25s,
      background-color 0.25s,
      box-shadow 0.25s;
  }
  .tc-checkout input::placeholder {
    color: #6f6da3;
  }
  .tc-checkout input:hover,
  .tc-checkout select:hover {
    border-color: rgba(190, 140, 255, 0.5);
  }
  .tc-checkout input:focus,
  .tc-checkout select:focus {
    background-color: rgba(140, 100, 255, 0.12);
    border-color: var(--v);
    box-shadow: 0 0 0 0.25rem rgba(143, 92, 255, 0.22);
    color: #fff;
  }
  .tc-checkout select {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    padding-right: 2.6rem;
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%23c9c3ff' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
  }
  .tc-checkout select option {
    background: #0e0e36;
    color: #fff;
  }
  .tc-checkout input:-webkit-autofill {
    caret-color: #000000;
  }
  
  /* validation states (supports common validator class names) */
  .tc-checkout input.error,
  .tc-checkout select.error,
  .tc-checkout .has-error input,
  .tc-checkout .has-error select,
  .tc-checkout .is-invalid {
    border-color: var(--p) !important;
    background-color: rgba(255, 79, 163, 0.07);
  }
  .tc-checkout input.error:focus,
  .tc-checkout select.error:focus {
    box-shadow: 0 0 0 0.25rem rgba(255, 79, 163, 0.2);
  }
  .tc-checkout label.error,
  .tc-checkout .error-message,
  .tc-checkout .error_message,
  .tc-checkout .help-block,
  .tc-checkout .invalid-feedback {
    display: block;
    margin: 0.4rem 0 0;
    font-size: 0.8rem;
    font-weight: 400;
    color: #ff7ab8;
  }
  .tc-checkout .alert,
  .tc-checkout .form-error,
  .tc-checkout #productId-error {
    margin-bottom: 1rem;
    padding: 0.8rem 1.1rem;
    border-radius: 14px;
    border: 1px solid rgba(255, 79, 163, 0.45);
    background: rgba(255, 79, 163, 0.1);
    color: #ffb3d6;
    font-size: 0.9rem;
  }
  
  /* ---------- payment ---------- */
  .payment-icons-strip {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 1.1rem;
    padding: 0.7rem 1rem;
    width: fit-content;
    max-width: 100%;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.92);
  }
  .payment-icons-strip img {
    display: block;
    height: 26px;
    width: auto;
    max-width: 100%;
  }
  .payment-options {
    display: grid;
    gap: 0.8rem;
  }
  .payment-option {
    border: 1px solid var(--line-2);
    border-radius: 18px;
    background: #070722;
    overflow: hidden;
    transition:
      border-color 0.3s,
      box-shadow 0.3s;
  }
  .payment-option:hover {
    border-color: rgba(190, 140, 255, 0.5);
  }
  .payment-option:has(input[type="radio"]:checked) {
    border-color: transparent;
    background:
      linear-gradient(#070722, #070722) padding-box,
      var(--grad) border-box;
    border: 1px solid transparent;
    box-shadow: 0 18px 50px -24px rgba(190, 80, 255, 0.7);
  }
  .tc-checkout .payment-option-header {
    display: flex;
    align-items: center;
    gap: 0.9rem;
    margin: 0;
    padding: 1rem 1.2rem;
    cursor: pointer;
    font-size: 0.95rem;
    color: #fff;
  }
  .payment-option-header img {
    display: block;
    height: 24px;
    width: auto;
  }
  .payment-option-label {
    font-weight: 500;
  }
  .tc-checkout input[type="radio"] {
    appearance: none;
    -webkit-appearance: none;
    flex: none;
    width: 20px;
    height: 20px;
    margin: 0;
    border-radius: 50%;
    border: 2px solid var(--line-2);
    background: var(--card);
    cursor: pointer;
    transition: 0.25s;
    position: relative;
  }
  .tc-checkout input[type="radio"]:hover {
    border-color: rgba(190, 140, 255, 0.8);
  }
  .tc-checkout input[type="radio"]:checked {
    border-color: transparent;
    background: var(--grad);
    box-shadow:
      0 0 0 4px rgba(150, 90, 255, 0.2),
      0 0 16px rgba(190, 80, 255, 0.7);
  }
  .tc-checkout input[type="radio"]:checked::after {
    content: "";
    position: absolute;
    inset: 5px;
    border-radius: 50%;
    background: #fff;
  }
  .card-fields {
    padding: 0.4rem 1.2rem 1.1rem;
    border-top: 1px solid var(--line);
  }
  .card-fields .row {
    padding-top: 1rem;
  }
  .card-fields .form-group:last-child {
    margin-bottom: 0;
  }
  .alternate-payment-providers {
    margin-top: 1rem;
  }
  .alternate-payment-providers:empty {
    display: none;
  }
  
  /* ---------- actions ---------- */
  .checkout-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 0.2rem;
  }
  .return-cart {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.8rem 1.4rem;
    border-radius: 999px;
    border: 1px solid var(--line-2);
    background: rgba(140, 120, 255, 0.07);
    color: var(--text);
    font-size: 0.92rem;
    font-weight: 500;
    backdrop-filter: blur(10px);
    transition: 0.3s;
  }
  .return-cart:hover {
    color: #fff;
    background: rgba(140, 120, 255, 0.18);
    border-color: rgba(190, 140, 255, 0.6);
  }
  .modal-sp-btn.btn,
  .btn-yellow {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    padding: 0.9rem 2.1rem;
    border: 0;
    border-radius: 999px;
    background: var(--grad);
    color: #fff;
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 1rem;
    line-height: 1.3;
    cursor: pointer;
    box-shadow:
      0 10px 40px -8px rgba(190, 80, 255, 0.6),
      inset 0 1px 0 rgba(255, 255, 255, 0.4);
    transition:
      box-shadow 0.3s,
      transform 0.3s;
  }
  .modal-sp-btn.btn:hover,
  .btn-yellow:hover,
  .modal-sp-btn.btn:focus-visible {
    color: #fff;
    transform: translateY(-2px);
    box-shadow:
      0 14px 54px -6px rgba(220, 80, 220, 0.85),
      inset 0 1px 0 rgba(255, 255, 255, 0.45);
  }
  .modal-sp-btn.btn:active {
    transform: translateY(0) scale(0.98);
  }
  .modal-sp-btn.btn:disabled,
  .modal-sp-btn.btn[disabled] {
    opacity: 0.55;
    cursor: not-allowed;
    transform: none;
  }
  .btn-yellow svg {
    margin-right: 0.5rem;
    flex: none;
  }
  @media (max-width: 575px) {
    .checkout-actions {
      flex-direction: column-reverse;
      align-items: stretch;
    }
    .checkout-actions .return-cart,
    .checkout-actions .btn-yellow {
      justify-content: center;
      width: 100%;
    }
  }
  
  /* ---------- order summary ---------- */
  .checkout-summary {
    position: sticky;
    top: 100px;
    padding: clamp(1.3rem, 3vw, 1.8rem);
    border: 1px solid var(--line-2);
    border-radius: 28px;
    background:
      radial-gradient(
        420px 220px at 100% -10%,
        rgba(130, 80, 255, 0.25),
        transparent 70%
      ),
      linear-gradient(180deg, var(--card-2), var(--card));
    box-shadow: 0 30px 90px -40px rgba(130, 80, 255, 0.6);
  }
  @media (max-width: 991px) {
    .checkout-summary {
      position: static;
    }
  }
  .summary-title {
    margin: 0 0 1.2rem;
    font-family: var(--font-head);
    font-size: 1.45rem;
    font-weight: 500;
    letter-spacing: -0.02em;
    color: #cfc9ff;
  }
  .summary-products {
    display: grid;
    gap: 0.7rem;
  }
  .summary-product {
    display: flex;
    align-items: center;
    gap: 0.9rem;
    margin: 0;
    padding: 0.75rem;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: #070722;
    transition:
      border-color 0.3s,
      background 0.3s;
  }
  .summary-product > span {
    margin-left: auto;
    flex: none;
    font-family: var(--font-head);
    font-weight: 500;
    color: #fff;
    white-space: nowrap;
  }
  .product-thumb {
    flex: none;
    width: 58px;
    height: 58px;
    border-radius: 14px;
    overflow: hidden;
    border: 1px solid var(--line-2);
    background: radial-gradient(
      circle at 30% 20%,
      rgba(150, 90, 255, 0.5),
      #0b0b30
    );
    padding: 10px;
  }
  .product-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }
  .product-info {
    min-width: 0;
    flex: 1;
  }
  .product-info h4 {
    margin: 0;
    font-family: var(--font-body);
    font-size: 0.92rem;
    font-weight: 500;
    line-height: 1.4;
    color: #eceaff;
    overflow-wrap: anywhere;
  }
  
  /* cross-sell */
  .summary-crosssell {
    margin-top: 1.1rem;
  }
  .summary-crosssell-title {
    margin: 0 0 0.7rem;
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--muted);
  }
  .summary-crosssell label.summary-product {
    cursor: pointer;
  }
  .summary-crosssell label.summary-product:hover {
    border-color: rgba(190, 140, 255, 0.5);
    background: rgba(140, 100, 255, 0.08);
  }
  .summary-crosssell label.summary-product:has(.crosssell-check:checked) {
    border-color: var(--v);
    background: rgba(140, 100, 255, 0.14);
  }
  .crosssell-check,
  .tc-checkout input[type="checkbox"] {
    appearance: none;
    -webkit-appearance: none;
    flex: none;
    width: 20px;
    height: 20px;
    margin: 0;
    border-radius: 6px;
    border: 2px solid var(--line-2);
    background: var(--card);
    cursor: pointer;
    position: relative;
    transition: 0.25s;
  }
  .crosssell-check:hover,
  .tc-checkout input[type="checkbox"]:hover {
    border-color: rgba(190, 140, 255, 0.8);
  }
  .crosssell-check:checked,
  .tc-checkout input[type="checkbox"]:checked {
    border-color: transparent;
    background: var(--grad);
    box-shadow: 0 0 14px rgba(190, 80, 255, 0.55);
  }
  .crosssell-check:checked::after,
  .tc-checkout input[type="checkbox"]:checked::after {
    content: "";
    position: absolute;
    left: 5px;
    top: 1px;
    width: 5px;
    height: 10px;
    border: solid #fff;
    border-width: 0 2.2px 2.2px 0;
    transform: rotate(45deg);
  }
  .crosssell-check:focus-visible,
  .tc-checkout input[type="checkbox"]:focus-visible,
  .tc-checkout input[type="radio"]:focus-visible {
    outline: 2px solid var(--v);
    outline-offset: 3px;
  }
  
  /* totals */
  .summary-totals {
    margin-top: 1.3rem;
    padding-top: 1.1rem;
    border-top: 1px solid var(--line);
  }
  .summary-line {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.4rem 0;
    font-size: 0.94rem;
    color: var(--muted);
  }
  .summary-line > span:last-child {
    color: #e4e1ff;
  }
  .summary-line .muted {
    color: var(--lav);
  }
  .summary-total {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 0.7rem;
    padding: 1rem 1.1rem;
    border: 1px solid var(--line-2);
    border-radius: 18px;
    background: rgba(120, 90, 255, 0.1);
    font-size: 1rem;
    font-weight: 500;
    color: #fff;
  }
  .final_amount {
    text-align: right;
  }
  .final_amount small {
    display: block;
    font-size: 0.72rem;
    color: var(--muted);
  }
  .final_amount strong {
    font-family: var(--font-head);
    font-size: 1.7rem;
    font-weight: 500;
    letter-spacing: -0.03em;
    background: var(--grad);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
  
  /* terms */
  .terms_cstm {
    margin-top: 0.4rem;
  }
  .checkout-terms {
    padding: 1.1rem 1.1rem 0.4rem;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: #070722;
  }
  .checkout-terms > .d-flex {
    margin-top: 0 !important;
  }
  .checkout-terms .form-check-label {
    margin: 0 0 0.8rem !important;
    font-size: 0.8rem;
    font-weight: 400;
    line-height: 1.7;
    color: var(--muted);
    cursor: pointer;
  }
  .checkout-terms .box {
    display: block;
    font-size: 0.8rem;
    line-height: 1.7;
  }
  .checkout-terms .form-check-input {
    margin-top: 0.2rem;
  }
  .checkout-terms strong {
    color: #eceaff;
    font-weight: 500;
  }
  .checkout-terms a {
    color: var(--lav);
    text-decoration: underline;
    text-decoration-color: rgba(201, 195, 255, 0.35);
    text-underline-offset: 3px;
    transition: 0.25s;
  }
  .checkout-terms a:hover {
    color: var(--p);
    text-decoration-color: var(--p);
  }
  .checkout-checkbox {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    margin-bottom: 1rem;
    color: #d3d1ff;
    font-size: 0.92rem;
  }
  .checkout-checkbox label {
    margin: 0;
    cursor: pointer;
  }
  input.has-error:not([name="agree-checkbox"]) {
    background: transparent  !important;
    border: 1px solid #482d87 !important;
}
  input[type=text]:focus, input[type=search]:focus, input[type=password]:focus, input[type=tel]:focus, input[type=email]:focus, select:focus, textarea:focus {
    background: #0a0a2c !important;
  }
 
  input.no-error:not([type="checkbox"]):not([type="radio"]):not([type="submit"]),
  select.no-error {
    background-color: rgba(140, 100, 255, 0.07)!important;
  }

  select.has-error:not([name="agree-checkbox"]) {
    background-color: rgba(140, 100, 255, 0.07)!important;
  }