/* ====================================================================
   RESONIC STUDIO — cart.css
   Headless Shopify cart UI: nav Cart tab + count badge, slide-in
   drawer + overlay, line-item rows, qty stepper, subtotal, checkout,
   and the /shop product grid. Reuses styles.css tokens only — no new
   colors, no new deps. Linked on every page that loads cart.js.
   ==================================================================== */

/* ============ Nav Cart tab + count badge ============ */
/* Inherits .nav__link (font, letter-spacing, underline-sweep, hover).
   Only adds badge anchoring. Injected into .nav__links by cart.js
   (renderNavTab) on page navs, and rendered by app.jsx on the home nav. */
.nav__cart {
  position: relative;
  display: inline-flex;
  align-items: center;
}
.nav__cart-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 16px;
  margin-left: 6px;
  padding: 1px 6px;
  background: var(--akane);
  color: var(--bone);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.04em;
  line-height: 1.4;
  border-radius: 999px;
  font-weight: 500;
  /* The underline-sweep pseudo from .nav__link draws under the whole
     anchor; the badge sits above it. */
  position: relative;
  z-index: 1;
}
.nav__cart-count[hidden] { display: none; }

/* ============ Overlay ============ */
.cart-overlay {
  position: fixed;
  inset: 0;
  z-index: 110;
  background: rgba(20, 17, 13, 0.32);
  opacity: 0;
  pointer-events: none;
  transition: opacity .28s var(--ease-out);
}
.cart-overlay.is-open {
  opacity: 1;
  pointer-events: auto;
}

/* ============ Drawer ============ */
.cart-drawer {
  position: fixed;
  top: 0;
  right: 0;
  height: 100%;
  width: min(420px, 92vw);
  z-index: 120;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform .32s cubic-bezier(.22, 1, .36, 1);
  background: rgba(239, 231, 214, 0.92);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  border-left: 0.5px solid var(--rule-soft);
  box-shadow: -30px 0 60px -30px rgba(20, 17, 13, 0.32);
  color: var(--sumi);
}
.cart-drawer.is-open { transform: translateX(0); }

/* --- Head --- */
.cart-drawer__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 24px var(--s-24);
  border-bottom: 0.5px solid var(--rule-soft);
  flex-shrink: 0;
}
.cart-drawer__title {
  font-family: var(--display);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: -0.012em;
  color: var(--sumi);
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 12px;
}
.cart-drawer__title-jp {
  font-family: var(--jp);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--akane);
}
.cart-drawer__close {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--sumi);
  border-bottom: 1px solid var(--rule);
  padding: 4px 0;
  transition: color .25s ease, border-color .25s ease;
  flex-shrink: 0;
}
.cart-drawer__close:hover { color: var(--akane); border-color: var(--akane); }

/* --- Lines (scroll region) --- */
.cart-lines {
  flex: 1 1 auto;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 8px var(--s-24);
  display: flex;
  flex-direction: column;
}

.cart-line {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 0.5px solid var(--rule-soft);
  align-items: start;
}
.cart-line:last-child { border-bottom: 0; }
.cart-line__img {
  width: 64px;
  height: 64px;
  object-fit: cover;
  background: var(--bone-2);
  border: 0.5px solid var(--rule-soft);
}
.cart-line__img--placeholder {
  display: block;
  width: 64px;
  height: 64px;
  background: var(--bone-2);
  border: 0.5px solid var(--rule-soft);
}
.cart-line__body {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.cart-line__title {
  font-family: var(--display);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: -0.008em;
  line-height: 1.2;
  color: var(--sumi);
  margin: 0;
}
.cart-line__variant {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--pencil);
}
.cart-line__price {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--sumi);
}
.cart-line__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 4px;
}

/* --- Qty stepper (− value +) --- */
.cart-line__qty {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--rule);
  background: rgba(244, 238, 224, 0.4);
}
.cart-line__qty button {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1;
  color: var(--sumi);
  transition: background .2s ease, color .2s ease;
}
.cart-line__qty button:hover { background: var(--akane); color: var(--bone); }
.cart-line__qty button:disabled { opacity: .4; cursor: default; }
.cart-line__qty button:disabled:hover { background: transparent; color: var(--sumi); }
.cart-line__qty-val {
  min-width: 30px;
  text-align: center;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--sumi);
  font-variant-numeric: lining-nums tabular-nums;
}

.cart-line__remove {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--pencil);
  border-bottom: 1px solid transparent;
  padding: 2px 0;
  transition: color .25s ease, border-color .25s ease;
}
.cart-line__remove:hover { color: var(--akane); border-color: var(--akane); }

/* --- Foot (subtotal + checkout) --- */
.cart-drawer__foot {
  flex-shrink: 0;
  padding: var(--s-24);
  border-top: 0.5px solid var(--rule-soft);
  display: flex;
  flex-direction: column;
  gap: 16px;
  background: rgba(244, 238, 224, 0.35);
}
.cart-drawer__subtotal {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--pencil);
}
.cart-drawer__subtotal-val {
  font-family: var(--display);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: -0.012em;
  text-transform: none;
  color: var(--sumi);
  font-variant-numeric: lining-nums;
}
.cart-drawer__note {
  font-family: var(--serif);
  font-style: italic;
  font-size: 12px;
  line-height: 1.5;
  color: var(--sumi-soft);
  margin: 0;
}
/* Checkout uses .btn-primary (full-width inside drawer) */
.cart-drawer__foot .btn-primary {
  width: 100%;
  justify-content: center;
  padding: 18px 28px;
}
/* Continue shopping uses .btn-quiet, centered */
.cart-drawer__foot .btn-quiet {
  align-self: center;
  border-bottom-color: transparent;
}
.cart-drawer__foot .btn-quiet:hover { border-bottom-color: var(--akane); }

/* ============ Drawer states (empty / loading / error / not-configured) ============ */
.cart-empty,
.cart-msg {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  text-align: center;
  padding: 40px var(--s-24);
}
.cart-msg__text {
  font-family: var(--serif);
  font-style: italic;
  font-size: 17px;
  line-height: 1.5;
  color: var(--sumi-soft);
  max-width: 26ch;
  margin: 0;
}
.cart-msg__icon {
  font-family: var(--jp);
  font-size: 34px;
  color: var(--akane);
  opacity: 0.5;
  line-height: 1;
}
.cart-msg__sub {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--pencil);
}
/* Loading line shown inline within .cart-lines while rehydrating */
.cart-loading {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--pencil);
  padding: 28px 0;
  text-align: center;
}
.cart-error {
  font-family: var(--serif);
  font-style: italic;
  font-size: 14px;
  color: var(--akane-deep);
  background: var(--akane-quiet);
  padding: 12px 16px;
  margin: 12px 0;
  text-align: center;
}

/* ====================================================================
   /shop — premade keyboards product grid
   Mirrors the gallery/works card conventions for editorial consistency.
   ==================================================================== */
.shop {
  position: relative;
  z-index: 2;
  padding: clamp(120px, 16vh, 180px) var(--gutter) clamp(96px, 13vh, 160px);
}

/* --- Header --- */
.shop__head {
  max-width: var(--max);
  margin: 0 auto 64px;
  border-bottom: 0.5px solid var(--rule);
  padding-bottom: 28px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.shop__title {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(40px, 5.4vw, 72px);
  line-height: 1;
  letter-spacing: -0.025em;
  margin: 0;
}
.shop__title-jp {
  font-family: var(--jp);
  font-size: 18px;
  letter-spacing: 0.14em;
  color: var(--akane);
  margin: 0;
}
.shop__sub {
  font-family: var(--serif);
  font-style: italic;
  font-size: 17px;
  line-height: 1.55;
  color: var(--sumi-soft);
  max-width: 46ch;
  margin: 0;
}

/* --- Grid --- */
.shop__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(36px, 4vw, 56px) clamp(20px, 2.4vw, 32px);
  max-width: var(--max);
  margin: 0 auto;
}

/* --- Product card --- */
.shop-card {
  display: flex;
  flex-direction: column;
  position: relative;
}
.shop-card__media {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--bone-2);
  margin-bottom: var(--s-16);
}
.shop-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: saturate(0.9) brightness(0.98);
  transition: transform 1s var(--ease-out), filter .6s ease;
}
.shop-card:hover .shop-card__media img {
  transform: scale(1.04);
  filter: saturate(1.05) brightness(1);
}
.shop-card__media--placeholder {
  display: grid;
  place-items: center;
}
.shop-card__media--placeholder::after {
  content: "工房";
  font-family: var(--jp);
  font-size: 32px;
  color: var(--pencil);
  opacity: 0.4;
}
/* Sold-out ribbon (top-left) */
.shop-card__flag {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 2;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--bone);
  background: rgba(20, 17, 13, 0.7);
  padding: 6px 10px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-left: 1.5px solid var(--akane);
  font-weight: 500;
}

.shop-card__body {
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1 1 auto;
}
.shop-card__name {
  font-family: var(--display);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: -0.012em;
  line-height: 1.05;
  margin: 0;
}
.shop-card__desc {
  font-family: var(--serif);
  font-size: 14px;
  line-height: 1.55;
  color: var(--sumi-soft);
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.shop-card__price {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--sumi);
  font-variant-numeric: lining-nums;
}

/* Variant selector (only when variants.length > 1) */
.shop-card__variants {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 4px 0 2px;
}
.shop-card__variant {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--sumi);
  padding: 7px 12px;
  border: 1px solid var(--rule);
  background: rgba(244, 238, 224, 0.4);
  transition: border-color .25s ease, color .25s ease, background .25s ease;
}
.shop-card__variant:hover { border-color: var(--akane); color: var(--akane); }
.shop-card__variant.is-active {
  border-color: var(--akane);
  background: var(--akane);
  color: var(--bone);
}
.shop-card__variant:disabled {
  opacity: .45;
  cursor: default;
  text-decoration: line-through;
}
.shop-card__variant:disabled:hover { border-color: var(--rule); color: var(--sumi); }

/* Add-to-cart row */
.shop-card__foot {
  margin-top: auto;
  padding-top: 14px;
}
/* Reuse .btn-primary but make it full-width within the card */
.shop-card__add.btn-primary {
  width: 100%;
  justify-content: center;
  padding: 16px 24px;
}
.shop-card__add.btn-primary:disabled,
.shop-card__add[disabled] {
  background: var(--bone-2);
  color: var(--pencil);
  box-shadow: none;
  cursor: default;
  pointer-events: none;
}
.shop-card__add[disabled]::after { content: none; }

/* --- Shop-level states --- */
.shop-state {
  max-width: var(--max);
  margin: 0 auto;
  min-height: 40vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  text-align: center;
}
.shop-state__text {
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(20px, 2.4vw, 28px);
  line-height: 1.4;
  color: var(--sumi-soft);
  max-width: 28ch;
  margin: 0;
}
.shop-state__sub {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--pencil);
}

/* Skeleton (loading) cards */
.shop-skeleton {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.shop-skeleton__media {
  aspect-ratio: 4 / 3;
  background: linear-gradient(100deg, var(--bone-2) 30%, var(--bone-soft) 50%, var(--bone-2) 70%);
  background-size: 200% 100%;
  animation: shopShimmer 1.4s ease-in-out infinite;
}
.shop-skeleton__line {
  height: 14px;
  width: 70%;
  background: var(--bone-2);
}
.shop-skeleton__line--short { width: 40%; }
@keyframes shopShimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ============ Responsive ============ */
@media (max-width: 1000px) {
  .shop__grid { grid-template-columns: repeat(2, 1fr); gap: 36px 18px; }
}
@media (max-width: 720px) {
  .cart-drawer { width: 100vw; }
  .cart-drawer__head { padding: 20px 18px; }
  .cart-lines { padding: 8px 18px; }
  .cart-drawer__foot { padding: 18px; }
}
@media (max-width: 540px) {
  .shop__grid { grid-template-columns: 1fr; gap: 40px; }
}

/* ============ Reduced motion ============ */
@media (prefers-reduced-motion: reduce) {
  .cart-overlay,
  .cart-drawer,
  .shop-card__media img,
  .cart-line__qty button,
  .cart-line__remove,
  .cart-drawer__close { transition: none !important; }
  .shop-skeleton__media { animation: none !important; }
}