/* =========================================================
   Silver Star Vending
   page-checkout-core.css
   Simplified professional checkout styling
   ========================================================= */

   :root {
    --checkout-page-max: 1720px;
    --checkout-content-max: 1560px;
  
    --checkout-bg:
      radial-gradient(circle at 10% 10%, rgba(85, 124, 176, 0.10), transparent 24%),
      radial-gradient(circle at 88% 8%, rgba(24, 66, 120, 0.08), transparent 22%),
      radial-gradient(circle at 50% 100%, rgba(96, 145, 196, 0.07), transparent 30%),
      linear-gradient(180deg, #f8fbff 0%, #f3f7fb 46%, #edf3f8 100%);
  
    --checkout-surface: rgba(255, 255, 255, 0.90);
    --checkout-surface-strong: rgba(255, 255, 255, 0.96);
    --checkout-surface-soft: rgba(247, 250, 254, 0.94);
  
    --checkout-text: #132235;
    --checkout-text-strong: #081524;
    --checkout-text-muted: #5c6b7f;
    --checkout-text-soft: #7c8aa0;
  
    --checkout-border: rgba(28, 71, 122, 0.10);
    --checkout-border-strong: rgba(28, 71, 122, 0.16);
  
    --checkout-primary: #1f4e8a;
    --checkout-primary-strong: #173d6d;
    --checkout-primary-soft: #e9f1fa;
    --checkout-primary-soft-2: #dce8f6;
  
    --checkout-accent: #6a8fb6;
    --checkout-success: #0b8a5a;
    --checkout-danger: #c44e4e;
  
    --checkout-shadow-xs: 0 4px 14px rgba(15, 23, 42, 0.05);
    --checkout-shadow-sm: 0 14px 34px rgba(15, 23, 42, 0.08);
    --checkout-shadow-md: 0 20px 54px rgba(15, 23, 42, 0.10);
    --checkout-shadow-lg: 0 28px 72px rgba(15, 23, 42, 0.12);
  
    --checkout-radius-xs: 12px;
    --checkout-radius-sm: 16px;
    --checkout-radius-md: 22px;
    --checkout-radius-lg: 28px;
    --checkout-radius-xl: 38px;
  
    --checkout-gap-2xs: 0.625rem;
    --checkout-gap-xs: 0.875rem;
    --checkout-gap-sm: 1rem;
    --checkout-gap-md: 1.25rem;
    --checkout-gap-lg: 1.5rem;
    --checkout-gap-xl: 2rem;
    --checkout-gap-2xl: 2.5rem;
    --checkout-gap-3xl: 3rem;
  
    --checkout-input-h: 60px;
    --checkout-btn-h: 58px;
    --checkout-sticky-offset: 112px;
    --checkout-backdrop: blur(16px);
  }
  
  html {
    scroll-behavior: smooth;
  }
  
  body {
    min-height: 100vh;
    color: var(--checkout-text);
    background: var(--checkout-bg);
    overflow-x: clip;
  }
  
  .checkout-page {
    position: relative;
    isolation: isolate;
  }
  
  .checkout-page::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    background:
      linear-gradient(
        180deg,
        rgba(255, 255, 255, 0.34) 0%,
        rgba(255, 255, 255, 0.08) 30%,
        rgba(255, 255, 255, 0) 100%
      );
    z-index: -1;
  }
  
  .checkout-page * {
    min-width: 0;
  }
  
  .checkout-page a,
  .checkout-page button,
  .checkout-page input,
  .checkout-page textarea,
  .checkout-page select {
    font: inherit;
  }
  
  .checkout-page button,
  .checkout-page input,
  .checkout-page textarea,
  .checkout-page select {
    outline: none;
  }
  
  /* =========================================================
     MAIN LAYOUT
     ========================================================= */
  
  .checkout-section {
    position: relative;
    padding: 9.5rem 0 clamp(3rem, 6vw, 6rem);
  }
  
  .checkout-shell {
    width: min(calc(100% - 40px), var(--checkout-content-max));
    margin: 0 auto;
  }
  
  .checkout-section-head {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 1.4rem 1.8rem;
    margin-bottom: 1.5rem;
  }
  
  .checkout-section-head h2 {
    margin: 0.75rem 0 0.65rem;
    color: var(--checkout-text-strong);
    font-size: clamp(2rem, 3vw, 3rem);
    line-height: 1.02;
    letter-spacing: -0.05em;
    text-wrap: balance;
  }
  
  .checkout-section-head p {
    max-width: 72ch;
    margin: 0;
    color: var(--checkout-text-muted);
    line-height: 1.8;
  }
  
  .checkout-head-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 52px;
    padding: 0.9rem 1.15rem;
    border-radius: 999px;
    border: 1px solid rgba(46, 89, 144, 0.12);
    background: rgba(255, 255, 255, 0.80);
    color: var(--checkout-text);
    font-weight: 700;
    white-space: nowrap;
    box-shadow: var(--checkout-shadow-xs);
    transition:
      color 0.2s ease,
      border-color 0.2s ease,
      background-color 0.2s ease,
      transform 0.2s ease,
      box-shadow 0.2s ease;
  }
  
  .checkout-head-link:hover,
  .checkout-head-link:focus-visible {
    color: var(--checkout-primary-strong);
    border-color: rgba(46, 89, 144, 0.20);
    background: rgba(255, 255, 255, 0.96);
    transform: translateY(-1px);
    box-shadow: var(--checkout-shadow-sm);
  }
  
  .checkout-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(350px, 440px);
    gap: clamp(1.25rem, 2vw, 1.8rem);
    align-items: start;
  }
  
  .checkout-main,
  .checkout-sidebar {
    display: grid;
    gap: 1.2rem;
  }
  
  .checkout-sidebar {
    position: sticky;
    top: var(--checkout-sticky-offset);
  }
  
  .checkout-panel,
  .checkout-success {
    position: relative;
    padding: clamp(1.1rem, 1.8vw, 1.55rem);
    border-radius: var(--checkout-radius-lg);
    background: linear-gradient(
      180deg,
      rgba(255, 255, 255, 0.96) 0%,
      rgba(249, 252, 255, 0.92) 100%
    );
    border: 1px solid rgba(46, 89, 144, 0.10);
    box-shadow: var(--checkout-shadow-sm);
    overflow: hidden;
    backdrop-filter: var(--checkout-backdrop);
    -webkit-backdrop-filter: var(--checkout-backdrop);
  }
  
  .checkout-panel::before {
    content: "";
    position: absolute;
    inset: 0 auto auto 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(
      90deg,
      rgba(46, 89, 144, 0.18),
      rgba(46, 89, 144, 0)
    );
    pointer-events: none;
  }
  
  .checkout-panel::after {
    content: "";
    position: absolute;
    inset: auto -12% -24% auto;
    width: 180px;
    height: 180px;
    border-radius: 999px;
    background: radial-gradient(circle, rgba(104, 145, 188, 0.07), transparent 70%);
    pointer-events: none;
    filter: blur(8px);
  }
  
  .checkout-sidebar-card {
    background: linear-gradient(
      180deg,
      rgba(250, 252, 255, 0.97) 0%,
      rgba(243, 248, 253, 0.93) 100%
    );
  }
  
  .checkout-panel-head {
    position: relative;
    margin-bottom: 1rem;
  }
  
  .checkout-panel-head h3 {
    margin: 0.7rem 0 0;
    color: var(--checkout-text-strong);
    font-size: 1.3rem;
    line-height: 1.12;
    letter-spacing: -0.035em;
    text-wrap: balance;
  }
  
  .checkout-mini-label,
  .checkout-panel-kicker,
  .checkout-success-kicker {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    width: fit-content;
    max-width: 100%;
    min-height: 34px;
    padding: 0.48rem 0.9rem;
    border-radius: 999px;
    background: linear-gradient(180deg, #f4f8fc 0%, #e8f0f9 100%);
    border: 1px solid rgba(46, 89, 144, 0.14);
    color: var(--checkout-primary);
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    box-shadow: 0 6px 18px rgba(46, 89, 144, 0.08);
  }
  
  /* =========================================================
     MODE SWITCH
     ========================================================= */
  
  .checkout-mode-panel {
    padding-top: 1.2rem;
    padding-bottom: 1.2rem;
  }
  
  .checkout-mode-switch {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.95rem;
  }
  
  .checkout-mode-btn {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 0.95rem;
    padding: 1rem;
    text-align: left;
    border-radius: var(--checkout-radius-md);
    border: 1px solid rgba(46, 89, 144, 0.10);
    background: linear-gradient(180deg, #ffffff 0%, #f6fafe 100%);
    color: var(--checkout-text);
    box-shadow: var(--checkout-shadow-xs);
    transition:
      border-color 0.2s ease,
      box-shadow 0.2s ease,
      transform 0.2s ease,
      background-color 0.2s ease;
  }
  
  .checkout-mode-btn:hover,
  .checkout-mode-btn:focus-visible {
    border-color: rgba(46, 89, 144, 0.22);
    box-shadow: var(--checkout-shadow-sm);
    transform: translateY(-1px);
  }
  
  .checkout-mode-btn.is-active {
    background: linear-gradient(180deg, #edf4fc 0%, #e1edf9 100%);
    border-color: rgba(31, 78, 138, 0.24);
    box-shadow:
      0 16px 34px rgba(31, 78, 138, 0.12),
      inset 0 0 0 1px rgba(255, 255, 255, 0.64);
  }
  
  .checkout-mode-icon {
    flex: 0 0 auto;
    display: grid;
    place-items: center;
    width: 2.9rem;
    height: 2.9rem;
    border-radius: 16px;
    background: linear-gradient(180deg, #ffffff 0%, #edf4fb 100%);
    border: 1px solid rgba(46, 89, 144, 0.10);
    color: var(--checkout-primary);
    font-size: 1.05rem;
    box-shadow: var(--checkout-shadow-xs);
  }
  
  .checkout-mode-copy {
    min-width: 0;
  }
  
  .checkout-mode-copy strong,
  .checkout-mode-copy small {
    display: block;
  }
  
  .checkout-mode-copy strong {
    color: var(--checkout-text-strong);
    font-size: 1rem;
    line-height: 1.2;
    font-weight: 800;
  }
  
  .checkout-mode-copy small {
    margin-top: 0.28rem;
    color: var(--checkout-text-muted);
    font-size: 0.89rem;
    line-height: 1.55;
  }
  
  .checkout-mode-note {
    margin-top: 1rem;
    padding: 0.9rem 1rem;
    border-radius: 16px;
    background: linear-gradient(
      180deg,
      rgba(247, 251, 255, 0.98) 0%,
      rgba(242, 248, 253, 0.94) 100%
    );
    border: 1px solid rgba(46, 89, 144, 0.08);
    color: var(--checkout-text-muted);
    font-size: 0.95rem;
    line-height: 1.65;
  }
  
  /* =========================================================
     SIMPLE STEP FLOW
     ========================================================= */
  
  /* Hide the chip container entirely for a cleaner flow */
  .checkout-steps-panel {
    display: none !important;
  }
  
  .checkout-form {
    display: grid;
    gap: 1.2rem;
  }
  
  .checkout-step-panel {
    padding-top: 1.25rem;
    padding-bottom: 1.25rem;
  }
  
  .checkout-step-panel[hidden] {
    display: none !important;
  }
  
  .checkout-step-heading {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 0.8rem;
    margin-bottom: 1.2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid rgba(46, 89, 144, 0.08);
  }
  
  .checkout-step-heading > div {
    display: grid;
    gap: 0.45rem;
  }
  
  .checkout-step-heading .checkout-panel-kicker {
    margin-bottom: 0;
  }
  
  .checkout-step-heading h3 {
    margin: 0;
    color: var(--checkout-text-strong);
    font-size: clamp(1.32rem, 2vw, 1.55rem);
    line-height: 1.08;
    letter-spacing: -0.035em;
    text-wrap: balance;
  }
  
  .checkout-step-heading p {
    margin: 0;
    color: var(--checkout-text-muted);
    line-height: 1.72;
    max-width: 70ch;
    background: transparent;
    border: 0;
    padding: 0;
    box-shadow: none;
  }
  
  .checkout-step-panel.is-active {
    box-shadow: 0 18px 46px rgba(15, 23, 42, 0.09);
  }
  
  .checkout-step-panel.is-active::after {
    background: radial-gradient(circle, rgba(31, 78, 138, 0.08), transparent 70%);
  }
  
  .checkout-step-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.95rem;
    margin-top: 1.25rem;
    padding-top: 1rem;
    border-top: 1px solid rgba(46, 89, 144, 0.08);
  }
  
  .checkout-step-actions-submit {
    align-items: stretch;
  }
  
  .checkout-submit-wrap {
    display: grid;
    gap: 0.8rem;
    justify-items: end;
    margin-left: auto;
  }
  
  .checkout-submit-help {
    margin: 0;
    color: var(--checkout-text-muted);
    line-height: 1.7;
    max-width: 42rem;
    text-align: right;
  }
  
  /* =========================================================
     FORM
     ========================================================= */
  
  .checkout-form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.05rem;
  }
  
  .checkout-field {
    display: grid;
    gap: 0.55rem;
    align-content: start;
  }
  
  .checkout-field-full {
    grid-column: 1 / -1;
  }
  
  .checkout-field span {
    color: var(--checkout-text);
    font-size: 0.89rem;
    line-height: 1.35;
    font-weight: 800;
    letter-spacing: 0.01em;
  }
  
  .checkout-field input,
  .checkout-field select,
  .checkout-field textarea {
    width: 100%;
    min-height: var(--checkout-input-h);
    padding: 0.98rem 1rem;
    border-radius: var(--checkout-radius-sm);
    border: 1px solid rgba(46, 89, 144, 0.10);
    background: linear-gradient(180deg, #ffffff 0%, #f7fbff 100%);
    color: var(--checkout-text-strong);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.75);
    transition:
      border-color 0.2s ease,
      box-shadow 0.2s ease,
      background-color 0.2s ease,
      transform 0.2s ease;
  }
  
  .checkout-field textarea {
    min-height: 154px;
    resize: vertical;
    padding-top: 1rem;
    line-height: 1.65;
  }
  
  .checkout-field input::placeholder,
  .checkout-field textarea::placeholder {
    color: #8797ac;
  }
  
  .checkout-field input:hover,
  .checkout-field select:hover,
  .checkout-field textarea:hover {
    border-color: rgba(46, 89, 144, 0.18);
    background: #ffffff;
  }
  
  .checkout-field input:focus,
  .checkout-field select:focus,
  .checkout-field textarea:focus {
    border-color: rgba(31, 78, 138, 0.36);
    background: #ffffff;
    box-shadow: 0 0 0 4px rgba(31, 78, 138, 0.10), 0 6px 20px rgba(31, 78, 138, 0.08);
  }
  
  .checkout-field select {
    appearance: none;
    background-image:
      linear-gradient(45deg, transparent 50%, rgba(31, 78, 138, 0.72) 50%),
      linear-gradient(135deg, rgba(31, 78, 138, 0.72) 50%, transparent 50%);
    background-position:
      calc(100% - 20px) calc(50% - 3px),
      calc(100% - 14px) calc(50% - 3px);
    background-size: 6px 6px, 6px 6px;
    background-repeat: no-repeat;
    padding-right: 2.75rem;
  }
  
  .checkout-field.is-invalid input,
  .checkout-field.is-invalid select,
  .checkout-field.is-invalid textarea {
    border-color: rgba(196, 78, 78, 0.52);
    box-shadow: 0 0 0 4px rgba(196, 78, 78, 0.08);
  }
  
  .checkout-form-error {
    margin-top: 0.2rem;
    padding: 1rem;
    border-radius: var(--checkout-radius-sm);
    background: rgba(255, 241, 241, 0.96);
    border: 1px solid rgba(196, 78, 78, 0.18);
    color: #8d2a2a;
    line-height: 1.6;
    font-weight: 600;
  }
  
  /* =========================================================
     CHOICE CARDS / PAYMENT BOXES
     ========================================================= */
  
  .checkout-choice-grid {
    display: grid;
    gap: 0.95rem;
  }
  
  .checkout-choice-grid + .checkout-choice-grid {
    margin-top: 1rem;
  }
  
  .checkout-choice-grid-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  
  .checkout-choice-card {
    position: relative;
    display: block;
    cursor: pointer;
  }
  
  .checkout-choice-card input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
  }
  
  .checkout-choice-content {
    display: block;
    height: 100%;
    padding: 1.02rem 1rem;
    border-radius: var(--checkout-radius-md);
    border: 1px solid rgba(46, 89, 144, 0.10);
    background: linear-gradient(180deg, #ffffff 0%, #f7fbff 100%);
    box-shadow: var(--checkout-shadow-xs);
    transition:
      border-color 0.2s ease,
      background-color 0.2s ease,
      transform 0.2s ease,
      box-shadow 0.2s ease;
  }
  
  .checkout-choice-card:hover .checkout-choice-content,
  .checkout-choice-card input:focus-visible + .checkout-choice-content {
    transform: translateY(-1px);
    box-shadow: var(--checkout-shadow-sm);
  }
  
  .checkout-choice-content strong,
  .checkout-choice-content small {
    display: block;
  }
  
  .checkout-choice-content strong {
    color: var(--checkout-text-strong);
    font-size: 0.98rem;
    line-height: 1.24;
    font-weight: 800;
  }
  
  .checkout-choice-content small {
    margin-top: 0.38rem;
    color: var(--checkout-text-muted);
    line-height: 1.6;
    font-size: 0.9rem;
  }
  
  .checkout-choice-card input:checked + .checkout-choice-content {
    background: linear-gradient(180deg, #eef5fd 0%, #e3eef9 100%);
    border-color: rgba(31, 78, 138, 0.24);
    box-shadow:
      0 16px 30px rgba(31, 78, 138, 0.10),
      inset 0 0 0 1px rgba(255, 255, 255, 0.60);
  }
  
  .checkout-payment-boxes {
    display: grid;
    gap: 1rem;
    margin-top: 1rem;
  }
  
  .checkout-payment-box {
    padding: 1.05rem;
    border-radius: var(--checkout-radius-md);
    background: linear-gradient(180deg, #fbfdff 0%, #f5f9fd 100%);
    border: 1px solid rgba(46, 89, 144, 0.10);
    box-shadow: var(--checkout-shadow-xs);
  }
  
  .checkout-payment-box-label {
    display: inline-flex;
    margin-bottom: 0.5rem;
    color: var(--checkout-primary);
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.13em;
    text-transform: uppercase;
  }
  
  .checkout-payment-box p {
    margin: 0 0 1rem;
    color: var(--checkout-text-muted);
    line-height: 1.7;
  }
  
  /* =========================================================
     CHECKS / BUTTONS
     ========================================================= */
  
  .checkout-checkboxes,
  .checkout-inline-checks {
    display: grid;
    gap: 0.9rem;
  }
  
  .checkout-checkboxes {
    margin-top: 0.1rem;
  }
  
  .checkout-check {
    display: flex;
    align-items: flex-start;
    gap: 0.85rem;
    padding: 1rem;
    border-radius: var(--checkout-radius-md);
    border: 1px solid rgba(46, 89, 144, 0.10);
    background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
    box-shadow: var(--checkout-shadow-xs);
    transition:
      border-color 0.2s ease,
      box-shadow 0.2s ease,
      background-color 0.2s ease;
  }
  
  .checkout-check:hover {
    border-color: rgba(46, 89, 144, 0.16);
    background: linear-gradient(180deg, #ffffff 0%, #f6fafe 100%);
  }
  
  .checkout-check-inline {
    align-items: center;
  }
  
  .checkout-check input {
    margin-top: 0.15rem;
    accent-color: var(--checkout-primary);
    flex: 0 0 auto;
  }
  
  .checkout-check span {
    color: var(--checkout-text-muted);
    line-height: 1.6;
  }
  
  .checkout-submit-btn,
  .checkout-summary-btn,
  .checkout-support-btn,
  .checkout-success-btn,
  .checkout-nav-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.7rem;
    min-height: var(--checkout-btn-h);
    padding: 0.92rem 1.35rem;
    border-radius: 999px;
    font-weight: 800;
    letter-spacing: -0.01em;
    box-shadow: var(--checkout-shadow-xs);
    transition:
      transform 0.2s ease,
      box-shadow 0.2s ease,
      border-color 0.2s ease,
      background-color 0.2s ease,
      color 0.2s ease,
      opacity 0.2s ease;
  }
  
  .checkout-submit-btn,
  .checkout-nav-btn-primary,
  .checkout-success-btn-primary {
    border: 1px solid rgba(31, 78, 138, 0.16);
    background: linear-gradient(180deg, #2d5f9d 0%, #1f4e8a 100%);
    color: #ffffff;
    box-shadow: 0 18px 34px rgba(31, 78, 138, 0.20);
  }
  
  .checkout-nav-btn-secondary,
  .checkout-summary-btn-secondary,
  .checkout-success-btn-secondary {
    background: linear-gradient(180deg, #ffffff 0%, #f7fbff 100%);
    border: 1px solid rgba(46, 89, 144, 0.12);
    color: var(--checkout-text);
  }
  
  .checkout-summary-btn-ghost {
    background: linear-gradient(180deg, #fbfdff 0%, #f4f8fc 100%);
    border: 1px dashed rgba(46, 89, 144, 0.18);
    color: var(--checkout-text-muted);
  }
  
  .checkout-submit-btn:hover,
  .checkout-submit-btn:focus-visible,
  .checkout-summary-btn:hover,
  .checkout-summary-btn:focus-visible,
  .checkout-support-btn:hover,
  .checkout-support-btn:focus-visible,
  .checkout-success-btn:hover,
  .checkout-success-btn:focus-visible,
  .checkout-nav-btn:hover,
  .checkout-nav-btn:focus-visible {
    transform: translateY(-1px);
    box-shadow: var(--checkout-shadow-sm);
  }
  
  .checkout-submit-btn[disabled] {
    opacity: 0.68;
    cursor: wait;
    transform: none;
  }
  
  .checkout-submit-icon {
    font-size: 1rem;
  }
  
  /* =========================================================
     REVIEW CARDS
     ========================================================= */
  
  .checkout-review-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.95rem;
    margin-bottom: 1rem;
  }
  
  .checkout-review-card {
    display: grid;
    gap: 0.38rem;
    min-height: 132px;
    padding: 1rem;
    border-radius: var(--checkout-radius-md);
    background: linear-gradient(180deg, #ffffff 0%, #f7fbff 100%);
    border: 1px solid rgba(46, 89, 144, 0.10);
    box-shadow: var(--checkout-shadow-xs);
  }
  
  .checkout-review-card small {
    color: var(--checkout-text-soft);
    font-size: 0.76rem;
    font-weight: 800;
    letter-spacing: 0.11em;
    text-transform: uppercase;
  }
  
  .checkout-review-card strong {
    color: var(--checkout-text-strong);
    font-size: 1rem;
    line-height: 1.28;
    word-break: break-word;
  }
  
  .checkout-review-card span {
    color: var(--checkout-text-muted);
    line-height: 1.5;
    word-break: break-word;
  }
  
  /* =========================================================
     SUMMARY
     ========================================================= */
  
  .checkout-summary-list {
    display: grid;
    gap: 0.9rem;
  }
  
  .checkout-summary-empty {
    padding: 1.25rem;
    border-radius: var(--checkout-radius-md);
    background: linear-gradient(180deg, #ffffff 0%, #f6fafe 100%);
    border: 1px dashed rgba(46, 89, 144, 0.18);
  }
  
  .checkout-summary-empty strong {
    display: block;
    margin-bottom: 0.35rem;
    color: var(--checkout-text-strong);
    font-size: 1rem;
  }
  
  .checkout-summary-empty p {
    margin: 0;
    color: var(--checkout-text-muted);
    line-height: 1.65;
  }
  
  .checkout-summary-item {
    display: grid;
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 1rem;
    align-items: start;
    padding: 1rem;
    border-radius: var(--checkout-radius-md);
    background: linear-gradient(180deg, #ffffff 0%, #f7fbff 100%);
    border: 1px solid rgba(46, 89, 144, 0.10);
    box-shadow: var(--checkout-shadow-xs);
  }
  
  .checkout-summary-item-media {
    aspect-ratio: 1 / 1;
    border-radius: 18px;
    overflow: hidden;
    background:
      radial-gradient(circle at 50% 20%, rgba(121, 158, 193, 0.18), transparent 46%),
      linear-gradient(180deg, #f8fbff 0%, #eef5fb 100%);
    border: 1px solid rgba(46, 89, 144, 0.08);
  }
  
  .checkout-summary-item-media img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: 0.45rem;
  }
  
  .checkout-summary-item-copy {
    min-width: 0;
  }
  
  .checkout-summary-item-type {
    display: inline-flex;
    margin-bottom: 0.32rem;
    color: var(--checkout-primary);
    font-size: 0.70rem;
    font-weight: 800;
    letter-spacing: 0.13em;
    text-transform: uppercase;
  }
  
  .checkout-summary-item h4 {
    margin: 0;
    color: var(--checkout-text-strong);
    font-size: 1rem;
    line-height: 1.32;
    letter-spacing: -0.02em;
    text-wrap: balance;
  }
  
  .checkout-summary-item-meta,
  .checkout-summary-item-total {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.75rem;
  }
  
  .checkout-summary-item-meta {
    margin-top: 0.62rem;
    color: var(--checkout-text-muted);
    font-size: 0.9rem;
    flex-wrap: wrap;
  }
  
  .checkout-summary-item-total {
    margin-top: 0.58rem;
    padding-top: 0.58rem;
    border-top: 1px dashed rgba(46, 89, 144, 0.12);
    color: var(--checkout-text);
    font-weight: 700;
  }
  
  .checkout-summary-item-total strong {
    color: var(--checkout-text-strong);
  }
  
  .checkout-summary-totals {
    display: grid;
    gap: 0.75rem;
    margin-top: 1.05rem;
    padding-top: 1rem;
    border-top: 1px solid rgba(46, 89, 144, 0.10);
  }
  
  .checkout-summary-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    color: var(--checkout-text-muted);
  }
  
  .checkout-summary-row strong {
    color: var(--checkout-text-strong);
  }
  
  .checkout-summary-row-total {
    margin-top: 0.15rem;
    padding-top: 0.9rem;
    border-top: 1px dashed rgba(46, 89, 144, 0.14);
    font-size: 1.02rem;
  }
  
  .checkout-summary-actions {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.9rem;
    margin-top: 1.1rem;
  }
  
  /* =========================================================
     SIDEBAR
     ========================================================= */
  
  .checkout-assurance-list {
    display: grid;
    gap: 0.95rem;
    margin: 0;
    padding: 0;
    list-style: none;
  }
  
  .checkout-assurance-list li {
    position: relative;
    padding-left: 1.2rem;
    color: var(--checkout-text-muted);
    line-height: 1.7;
  }
  
  .checkout-assurance-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.72rem;
    width: 0.42rem;
    height: 0.42rem;
    border-radius: 999px;
    background: var(--checkout-primary);
    box-shadow: 0 0 0 6px rgba(31, 78, 138, 0.08);
  }
  
  .checkout-support-actions {
    display: grid;
    gap: 0.85rem;
  }
  
  .checkout-support-btn {
    justify-content: flex-start;
    background: linear-gradient(180deg, #ffffff 0%, #f7fbff 100%);
    border: 1px solid rgba(46, 89, 144, 0.10);
    color: var(--checkout-text);
  }
  
  .checkout-support-copy {
    margin: 1rem 0 0;
    color: var(--checkout-text-muted);
    line-height: 1.7;
  }
  
  /* =========================================================
     SUCCESS
     ========================================================= */
  
  .checkout-success {
    padding: clamp(1.9rem, 4vw, 3rem);
    border-radius: var(--checkout-radius-xl);
    background:
      radial-gradient(circle at top center, rgba(100, 142, 182, 0.12), transparent 40%),
      linear-gradient(180deg, rgba(255, 255, 255, 0.97) 0%, rgba(246, 250, 255, 0.92) 100%);
    border: 1px solid rgba(46, 89, 144, 0.12);
    box-shadow: var(--checkout-shadow-md);
    text-align: center;
  }
  
  .checkout-success-icon {
    display: grid;
    place-items: center;
    width: 78px;
    height: 78px;
    margin: 0 auto 1rem;
    border-radius: 999px;
    background: linear-gradient(180deg, #ebf8f2 0%, #ddf4ea 100%);
    border: 1px solid rgba(11, 138, 90, 0.16);
    color: var(--checkout-success);
    font-size: 1.65rem;
    font-weight: 800;
    box-shadow: 0 14px 30px rgba(11, 138, 90, 0.12);
  }
  
  .checkout-success h2 {
    margin: 0.95rem 0 0.8rem;
    color: var(--checkout-text-strong);
    font-size: clamp(2rem, 4.4vw, 3.2rem);
    line-height: 1.02;
    letter-spacing: -0.05em;
    text-wrap: balance;
  }
  
  .checkout-success p {
    max-width: 58ch;
    margin: 0 auto;
    color: var(--checkout-text-muted);
    line-height: 1.74;
  }
  
  .checkout-success-meta {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 220px));
    justify-content: center;
    gap: 1rem;
    margin-top: 1.55rem;
  }
  
  .checkout-success-card {
    padding: 1rem;
    border-radius: var(--checkout-radius-md);
    background: linear-gradient(180deg, #ffffff 0%, #f7fbff 100%);
    border: 1px solid rgba(46, 89, 144, 0.10);
    box-shadow: var(--checkout-shadow-xs);
  }
  
  .checkout-success-card small,
  .checkout-success-card strong {
    display: block;
  }
  
  .checkout-success-card small {
    margin-bottom: 0.35rem;
    color: var(--checkout-text-soft);
    font-weight: 700;
  }
  
  .checkout-success-card strong {
    color: var(--checkout-text-strong);
    font-size: 1.05rem;
    line-height: 1.25;
  }
  
  .checkout-success-actions {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.9rem;
    margin-top: 1.55rem;
  }
  
  /* =========================================================
     LARGE DESKTOP
     ========================================================= */
  
  @media (min-width: 1600px) {
    :root {
      --checkout-sticky-offset: 130px;
      --checkout-input-h: 64px;
      --checkout-btn-h: 62px;
    }
  
    .checkout-grid {
      grid-template-columns: minmax(0, 1.1fr) minmax(390px, 490px);
      gap: 1.8rem;
    }
  
    .checkout-panel,
    .checkout-success {
      padding-left: 1.75rem;
      padding-right: 1.75rem;
    }
  }
  
  /* =========================================================
     TABLET / SMALL DESKTOP
     ========================================================= */
  
  @media (max-width: 1280px) {
    .checkout-grid {
      grid-template-columns: minmax(0, 1fr) minmax(330px, 410px);
    }
  }
  
  @media (max-width: 1180px) {
    .checkout-grid {
      grid-template-columns: 1fr;
    }
  
    .checkout-sidebar {
      position: static;
      top: auto;
      grid-template-columns: repeat(3, minmax(0, 1fr));
    }
  
    .checkout-summary-panel {
      grid-column: 1 / -1;
    }
  }
  
  @media (max-width: 960px) {
    .checkout-section-head {
      flex-direction: column;
      align-items: flex-start;
    }
  
    .checkout-sidebar {
      grid-template-columns: 1fr;
    }
  
    .checkout-form-grid,
    .checkout-choice-grid-3,
    .checkout-review-grid {
      grid-template-columns: 1fr 1fr;
    }
  
    .checkout-submit-wrap {
      justify-items: stretch;
      margin-left: 0;
      width: 100%;
    }
  
    .checkout-submit-help {
      text-align: left;
      max-width: 100%;
    }
  
    .checkout-step-actions-submit {
      flex-direction: column;
      align-items: stretch;
    }
  
    .checkout-step-actions-submit > .checkout-nav-btn-secondary,
    .checkout-step-actions-submit .checkout-submit-btn {
      width: 100%;
    }
  }
  
  /* =========================================================
     MOBILE
     ========================================================= */
  
  @media (max-width: 720px) {
    :root {
      --checkout-sticky-offset: 88px;
      --checkout-input-h: 58px;
      --checkout-btn-h: 56px;
    }
  
    .checkout-section {
      padding-top: 8.7rem;
      padding-bottom: 2.5rem;
    }
  
    .checkout-shell {
      width: min(calc(100% - 22px), var(--checkout-page-max));
    }
  
    .checkout-panel,
    .checkout-success {
      border-radius: 24px;
    }
  
    .checkout-form-grid,
    .checkout-mode-switch,
    .checkout-summary-actions,
    .checkout-success-meta,
    .checkout-choice-grid-3,
    .checkout-review-grid {
      grid-template-columns: 1fr;
    }
  
    .checkout-step-heading {
      gap: 0.7rem;
      margin-bottom: 1rem;
      padding-bottom: 0.9rem;
    }
  
    .checkout-step-heading h3 {
      font-size: 1.3rem;
    }
  
    .checkout-step-heading p {
      font-size: 0.95rem;
    }
  
    .checkout-step-actions {
      flex-direction: column;
      align-items: stretch;
    }
  
    .checkout-step-actions .checkout-nav-btn,
    .checkout-step-actions .checkout-submit-btn {
      width: 100%;
    }
  
    .checkout-summary-item {
      grid-template-columns: 80px minmax(0, 1fr);
    }
  
    .checkout-success-actions {
      flex-direction: column;
    }
  
    .checkout-success-actions .checkout-success-btn,
    .checkout-head-link {
      width: 100%;
    }
  }
  
  @media (max-width: 560px) {
    .checkout-panel {
      padding: 1rem;
    }
  
    .checkout-section-head p,
    .checkout-submit-help,
    .checkout-support-copy,
    .checkout-success p,
    .checkout-step-heading p {
      font-size: 0.95rem;
    }
  
    .checkout-head-link,
    .checkout-submit-btn,
    .checkout-summary-btn,
    .checkout-support-btn,
    .checkout-nav-btn {
      width: 100%;
    }
  
    .checkout-check {
      padding: 0.95rem;
    }
  
    .checkout-summary-item {
      grid-template-columns: 72px minmax(0, 1fr);
      gap: 0.8rem;
      padding: 0.82rem;
    }
  
    .checkout-summary-item h4 {
      font-size: 0.96rem;
    }
  
    .checkout-success {
      padding: 1.55rem 1rem;
    }
  
    .checkout-choice-content,
    .checkout-mode-btn,
    .checkout-payment-box,
    .checkout-review-card {
      padding: 0.95rem;
    }
  }
  
  @media (max-width: 380px) {
    .checkout-section {
      padding-top: 8.35rem;
    }
  
    .checkout-shell {
      width: min(calc(100% - 16px), var(--checkout-page-max));
    }
  
    .checkout-panel,
    .checkout-success {
      border-radius: 22px;
    }
  
    .checkout-field input,
    .checkout-field select,
    .checkout-field textarea,
    .checkout-submit-btn,
    .checkout-summary-btn,
    .checkout-support-btn,
    .checkout-success-btn,
    .checkout-nav-btn {
      min-height: 54px;
    }
  
    .checkout-step-heading h3 {
      font-size: 1.22rem;
    }
  
    .checkout-step-heading p,
    .checkout-choice-content small,
    .checkout-mode-copy small {
      font-size: 0.9rem;
    }
  }
  
  /* =========================================================
     LANDSCAPE LOW HEIGHT
     ========================================================= */
  
  @media (max-height: 540px) and (orientation: landscape) {
    .checkout-section {
      padding-top: 7.2rem;
    }
  
    .checkout-sidebar {
      position: static;
    }
  
    .checkout-panel,
    .checkout-success {
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
    }
  }
  
  /* =========================================================
     REDUCED MOTION
     ========================================================= */
  
  @media (prefers-reduced-motion: reduce) {
    html {
      scroll-behavior: auto;
    }
  
    .checkout-mode-btn,
    .checkout-submit-btn,
    .checkout-summary-btn,
    .checkout-support-btn,
    .checkout-success-btn,
    .checkout-nav-btn,
    .checkout-choice-content,
    .checkout-field input,
    .checkout-field select,
    .checkout-field textarea,
    .checkout-head-link,
    .checkout-check {
      transition: none;
    }
  }
  
  /* =========================================================
     PRINT
     ========================================================= */
  
  @media print {
    body {
      background: #ffffff;
      color: #000000;
    }
  
    .mobile-header-actions,
    .nav-toggle,
    .drawer-overlay,
    .mobile-drawer,
    .cart-drawer,
    .cart-drawer-backdrop,
    .checkout-steps-panel,
    .checkout-summary-actions,
    .checkout-step-actions,
    .checkout-support-actions,
    .checkout-success-actions,
    .nav-auth-guest,
    .nav-auth-user {
      display: none !important;
    }
  
    .checkout-section {
      padding: 1rem 0;
    }
  
    .checkout-panel,
    .checkout-success {
      background: #ffffff;
      box-shadow: none;
      border: 1px solid #d8dee8;
      backdrop-filter: none;
      -webkit-backdrop-filter: none;
    }
  
    .checkout-grid,
    .checkout-sidebar,
    .checkout-form-grid,
    .checkout-success-meta,
    .checkout-review-grid {
      display: block;
    }
  
    .checkout-sidebar {
      margin-top: 1rem;
    }
  }