/* Page shell */
body {
  margin: 0;
  min-height: 100dvh;
  background: #060d1a;
  color: #FFFFFF;
  font-family: 'Figtree', sans-serif;
  font-size: 16px; /* D-V3-18 */
  line-height: 1.5;
}

.checkout {
  display: grid;
  grid-template-columns: 1fr;
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px max(20px, env(safe-area-inset-right)) max(40px, env(safe-area-inset-bottom)) max(20px, env(safe-area-inset-left));
  gap: 32px;
}

/* MOBILE-first: order summary appears at TOP via <details> */
.checkout__summary--mobile {
  background: #0a1322;
  border-bottom: 1px solid rgba(78,163,227,0.18);
  padding: 16px max(20px, env(safe-area-inset-right)) 16px max(20px, env(safe-area-inset-left));
}
.checkout__summary--mobile summary {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  list-style: none;
  min-height: 44px; /* tap target */
}
.checkout__summary--mobile summary::-webkit-details-marker { display: none; }
.checkout__total-inline {
  margin-left: auto;
  font-weight: 600;
  font-size: 16px;
}
.checkout__summary-toggle {
  font-family: 'Syne', sans-serif;
  color: rgba(255,255,255,0.5);
  transition: transform 200ms;
}
.checkout__summary--mobile[open] .checkout__summary-toggle { transform: rotate(180deg); }
.checkout__summary-body { padding: 12px 0 0; }

/* DESKTOP: hide mobile summary, show desktop summary right rail */
.checkout__summary-col { display: none; }
@media (min-width: 960px) {
  .checkout { grid-template-columns: 1fr 380px; }
  .checkout__summary--mobile { display: none; }
  .checkout__summary-col { display: block; }
  .checkout__summary-sticky {
    position: sticky;
    top: 24px;
    padding: 24px;
    border-left: 1px solid rgba(78,163,227,0.18); /* hairline divider */
    /* The vertical hairline visually separates form from summary */
  }
}

/* Form section: every label is a row */
.checkout__section {
  border: none;
  padding: 24px 0;
  margin: 0;
  border-top: 1px solid rgba(78,163,227,0.18);
}
.checkout__section:first-of-type { border-top: 0; }
.checkout__section legend {
  font-family: 'Syne', sans-serif;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan, #4FA3E3);
  margin-bottom: 16px;
  padding: 0;
}
.checkout__section label:not(.checkbox-row):not(.rail-card) {
  display: block;
  margin-bottom: 12px;
}
.checkout__section label > span {
  display: block;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: rgba(255,255,255,0.6);
  margin-bottom: 6px;
}

/* Inputs: D-V3-18 — font-size:16px prevents iOS auto-zoom; min-height:48px */
input[type="text"], input[type="email"], input[type="tel"] {
  width: 100%;
  padding: 12px 14px;
  font-size: 16px;
  min-height: 48px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(78,163,227,0.3);
  color: #FFFFFF;
  font-family: inherit;
  box-sizing: border-box;
}
input:focus {
  outline: none;
  border-color: var(--cyan, #4FA3E3);
}
input::placeholder { color: rgba(255,255,255,0.35); }

.checkout__row-3 {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 12px;
}
@media (max-width: 480px) {
  .checkout__row-3 { grid-template-columns: 1fr; }
}

/* Checkbox rows — full row tappable, 44px min */
.checkbox-row {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  min-height: 44px;
  padding: 8px 0;
  cursor: pointer;
}
.checkbox-row input[type="checkbox"] {
  width: 20px;
  height: 20px;
  margin-top: 2px;
  accent-color: var(--cyan, #4FA3E3);
}

/* Rail cards (radio) */
.rail-card {
  display: flex;
  gap: 16px;
  padding: 16px;
  border: 1px solid rgba(78,163,227,0.3);
  margin-bottom: 12px;
  cursor: pointer;
  transition: border-color 200ms, background 200ms;
}
.rail-card:has(input:checked) {
  border-color: var(--cyan, #4FA3E3);
  background: rgba(78,163,227,0.06);
}
.rail-card input[type="radio"] {
  margin-top: 4px;
  accent-color: var(--cyan, #4FA3E3);
}
.rail-card__body strong {
  display: block;
  font-family: 'Syne', sans-serif;
  font-size: 14px;
  letter-spacing: 0.04em;
  margin-bottom: 4px;
}
.rail-card__sub {
  display: block;
  font-size: 13px;
  color: rgba(255,255,255,0.6);
  line-height: 1.4;
}

/* Submit button — sticky bottom on mobile (D-V3-18 — keep CTA in thumb zone) */
.checkout__submit {
  width: 100%;
  min-height: 52px;
  margin-top: 24px;
  padding: 16px 20px;
  font-family: 'Syne', sans-serif;
  font-size: 14px;
  letter-spacing: 0.04em;
  background: var(--cyan, #4FA3E3);
  color: #060d1a;
  border: 0;
  cursor: pointer;
  transition: opacity 200ms;
}
.checkout__submit:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}
.checkout__submit-spinner { margin-left: 8px; }
.is-loading { opacity: 0.7; }

@media (max-width: 959px) {
  .checkout__submit {
    position: sticky;
    bottom: 0;
    margin: 24px calc(-1 * max(20px, env(safe-area-inset-left))) 0;
    padding: 16px max(20px, env(safe-area-inset-right)) max(16px, env(safe-area-inset-bottom)) max(20px, env(safe-area-inset-left));
    background: linear-gradient(to top, var(--cyan, #4FA3E3) 80%, rgba(78,163,227,0.6));
    /* Ensure visual contrast through the gradient — keep text on accent */
  }
}

/* Banner */
.checkout__banner {
  margin-bottom: 16px;
  padding: 12px 16px;
  border: 1px solid #d62828;
  background: rgba(214,40,40,0.08);
  color: rgba(255,255,255,0.9);
  font-size: 14px;
  border-radius: 0; /* flat editorial feel */
}

/* Summary */
.summary-line {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid rgba(78,163,227,0.12);
  font-size: 14px;
}
.summary-line__name { color: rgba(255,255,255,0.85); }
.summary-line__qty { color: rgba(255,255,255,0.5); margin-left: 6px; }
.summary-totals {
  margin-top: 12px;
  font-size: 14px;
}
.summary-totals > div {
  display: flex;
  justify-content: space-between;
  padding: 4px 0;
}
.summary-totals__muted { color: rgba(255,255,255,0.55); }
.summary-totals__final {
  font-weight: 600;
  font-size: 16px;
  margin-top: 8px;
}
.summary-ruo {
  margin-top: 12px;
  font-size: 12px;
  font-style: italic;
  color: rgba(255,255,255,0.5);
}

/* Section label utility */
.section-label {
  font-family: 'Syne', sans-serif;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan, #4FA3E3);
}

.checkout__title {
  font-family: 'CaeciliaSans', serif;
  font-style: italic;
  font-size: 32px;
  margin: 12px 0 0;
  line-height: 1.1;
}

.hairline {
  border: none;
  border-top: 1px solid rgba(78,163,227,0.18);
  margin: 12px 0;
}

.mono-plex {
  font-family: 'IBM Plex Mono', 'Courier New', monospace;
  font-weight: 500;
  letter-spacing: 0.04em;
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px; padding: 0;
  margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

.rail-card--disabled { opacity: 0.45; cursor: not-allowed; }
.rail-card--disabled input[type="radio"] { cursor: not-allowed; }

/* ─── Branding polish (V3 checkout) ─────────────────────────────────────── */

/* Brand header — top of page, above mobile summary */
.checkout__brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  padding: 28px max(20px, env(safe-area-inset-right)) 22px max(20px, env(safe-area-inset-left));
  text-align: center;
  border-bottom: 1px solid rgba(78,163,227,0.18);
}
.checkout__brand-link {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  color: inherit;
}
.checkout__logo {
  height: 56px;
  width: auto;
  object-fit: contain;
  display: block;
  flex-shrink: 0;
}
.checkout__wordmark {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 0.95;
  text-align: left;
}
.checkout__wordmark-top {
  font-family: 'CaeciliaSans', 'PMNCaeciliaSans', serif;
  font-style: italic;
  font-weight: 800;
  font-size: 22px;
  color: #FFFFFF;
  letter-spacing: 0.005em;
}
.checkout__wordmark-bot {
  font-family: 'Syne', sans-serif;
  font-weight: 600;
  font-size: 11px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--cyan, #4FA3E3);
  margin-top: 4px;
}
.checkout__hero-sub {
  font-family: 'Figtree', sans-serif;
  font-style: italic;
  font-size: 13px;
  color: rgba(255,255,255,0.7);
  margin: 0;
  letter-spacing: 0.01em;
  max-width: 480px;
  line-height: 1.45;
}
@media (min-width: 960px) {
  .checkout__brand {
    padding: 36px 24px 28px;
    gap: 16px;
  }
  .checkout__logo { height: 68px; }
  .checkout__wordmark-top { font-size: 26px; }
  .checkout__wordmark-bot { font-size: 12px; }
  .checkout__hero-sub { font-size: 14px; }
}

/* Step indicator */
.checkout__steps {
  margin-bottom: 24px;
}
.checkout__steps ol {
  display: flex;
  list-style: none;
  padding: 0;
  margin: 0;
  gap: 24px;
  border-bottom: 1px solid rgba(78,163,227,0.18);
}
.checkout__steps li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 0 0 12px;
  font-family: 'Syne', sans-serif;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
  position: relative;
}
.checkout__steps .step-num {
  font-family: 'IBM Plex Mono', 'Courier New', monospace;
  font-weight: 500;
  font-size: 10px;
  color: rgba(255,255,255,0.35);
}
.checkout__steps li.is-current {
  color: var(--cyan, #4FA3E3);
}
.checkout__steps li.is-current::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 1px;
  background: var(--cyan, #4FA3E3);
}
.checkout__steps li.is-current .step-num {
  color: var(--cyan, #4FA3E3);
}

/* Right-rail summary heading: Caecilia italic voice */
.checkout__summary-heading {
  font-family: 'CaeciliaSans', serif;
  font-style: italic;
  font-size: 24px;
  font-weight: 400;
  color: #FFFFFF;
  margin: 0 0 16px;
  padding: 0;
  letter-spacing: 0;
  text-transform: none;
}

/* Form column: 1px border-top + border-bottom framing on desktop */
@media (min-width: 960px) {
  .checkout__form-col {
    padding-top: 24px;
    padding-bottom: 24px;
    border-top: 1px solid rgba(78,163,227,0.18);
    border-bottom: 1px solid rgba(78,163,227,0.18);
  }
}

/* Place-order hover: inset glow + micro-scale on desktop */
@media (hover: hover) and (pointer: fine) {
  .checkout__submit:hover:not(:disabled) {
    box-shadow: inset 0 0 0 1px rgba(255,255,255,0.4);
    transform: scale(1.005);
    transition: transform 200ms ease, box-shadow 200ms ease;
  }
}
@media (prefers-reduced-motion: reduce) {
  .checkout__submit:hover:not(:disabled) {
    transform: none;
  }
}