/* ============================================================
   AETHER — design system + components
   Mobile-first, dark by default, WCAG-AA contrast, fluid motion.
   ============================================================ */

:root {
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --serif: Georgia, "Times New Roman", serif;

  --maxw: 1180px;
  --radius: 14px;
  --radius-sm: 10px;
  --radius-lg: 22px;
  --gap: clamp(1rem, 3vw, 2rem);

  --shadow-1: 0 1px 2px rgba(0,0,0,.18), 0 4px 16px rgba(0,0,0,.16);
  --shadow-2: 0 8px 40px rgba(0,0,0,.34);
  --ease: cubic-bezier(.4, .0, .2, 1);
  --t-fast: .16s;
  --t: .26s;
}

/* ---- Dark theme (default) ---- */
[data-theme="dark"] {
  --bg: #070a10;
  --bg-grad-1: #0c1018;
  --bg-grad-2: #070a10;
  --surface: #11151d;
  --surface-2: #161c27;
  --surface-3: #1d2532;
  --border: #262e3c;
  --border-strong: #36404f;
  --text: #eef2f8;
  --text-muted: #9fadc0;
  --text-dim: #717f92;
  --accent: #57cdf2;
  --accent-strong: #7ad9f6;
  --accent-ink: #04141c;
  --success: #59d99b;
  --danger: #ff7a85;
  --warn: #ffce6b;
  --star: #ffc861;
}

/* ---- Light theme ---- */
[data-theme="light"] {
  --bg: #f4f6fa;
  --bg-grad-1: #ffffff;
  --bg-grad-2: #e9edf4;
  --surface: #ffffff;
  --surface-2: #f3f5f9;
  --surface-3: #e9edf3;
  --border: #dde3ec;
  --border-strong: #c5cedb;
  --text: #0f1626;
  --text-muted: #51607a;
  --text-dim: #76839a;
  --accent: #0a7ea4;
  --accent-strong: #0c93bf;
  --accent-ink: #ffffff;
  --success: #128a5a;
  --danger: #c0303d;
  --warn: #9a6b00;
  --star: #e0a92e;
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.no-scroll { overflow: hidden; }

h1, h2, h3, h4 { line-height: 1.15; margin: 0 0 .4em; font-weight: 650; letter-spacing: -0.01em; }
h1 { font-size: clamp(1.8rem, 4.5vw, 2.9rem); }
h2 { font-size: clamp(1.4rem, 3.2vw, 2.1rem); }
p { margin: 0 0 1rem; }
a { color: inherit; text-decoration: none; }
img, svg, canvas { display: block; max-width: 100%; }
button { font: inherit; cursor: pointer; }

.wrap { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: clamp(1rem, 4vw, 2rem); }

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

.skip-link {
  position: fixed; top: -60px; left: 12px; z-index: 200;
  background: var(--accent); color: var(--accent-ink);
  padding: .6rem 1rem; border-radius: var(--radius-sm); font-weight: 600;
  transition: top var(--t) var(--ease);
}
.skip-link:focus { top: 12px; }

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

.muted { color: var(--text-muted); }

/* ============ Buttons ============ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  border: 1px solid transparent; border-radius: 999px;
  padding: .72rem 1.4rem; font-weight: 600; font-size: .95rem;
  transition: transform var(--t-fast) var(--ease), background var(--t) var(--ease),
              box-shadow var(--t) var(--ease), border-color var(--t) var(--ease), opacity var(--t);
}
.btn:active { transform: translateY(1px) scale(.99); }
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { background: var(--accent-strong); box-shadow: 0 6px 22px -8px var(--accent); }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--border-strong); }
.btn-ghost:hover { background: var(--surface-2); }
.btn-soft { background: var(--surface-3); color: var(--text); }
.btn-soft:hover { background: var(--border); }
.btn-lg { padding: .95rem 1.8rem; font-size: 1.02rem; }
.btn-block { width: 100%; }
.btn:disabled, .btn[aria-disabled="true"], .is-disabled { opacity: .45; pointer-events: none; }

.icon-btn {
  display: inline-grid; place-items: center;
  width: 42px; height: 42px; border-radius: 12px;
  background: transparent; border: 1px solid transparent; color: var(--text);
  transition: background var(--t), border-color var(--t);
  position: relative;
}
.icon-btn:hover { background: var(--surface-2); }
.icon-btn svg { width: 22px; height: 22px; }

/* ============ Header ============ */
.site-header {
  position: sticky; top: 0; z-index: 60;
  backdrop-filter: saturate(1.4) blur(14px);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; gap: 1rem; min-height: 64px; }
.brand { display: inline-flex; align-items: center; gap: .55rem; font-weight: 800; letter-spacing: .14em; color: var(--text); }
.brand-mark { width: 28px; height: 28px; color: var(--accent); }
.brand-text { font-size: .98rem; }
.main-nav { display: none; gap: 1.4rem; margin-left: 1rem; }
.main-nav a { color: var(--text-muted); font-weight: 500; font-size: .95rem; transition: color var(--t); }
.main-nav a:hover { color: var(--text); }
.header-controls { display: flex; align-items: center; gap: .4rem; margin-left: auto; }

.segmented {
  display: inline-flex; background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 999px; padding: 3px;
}
.segmented button {
  border: 0; background: transparent; color: var(--text-muted);
  padding: .3rem .65rem; border-radius: 999px; font-weight: 600; font-size: .85rem;
  transition: background var(--t), color var(--t);
}
.segmented button[aria-pressed="true"] { background: var(--accent); color: var(--accent-ink); }

.ic-moon { display: none; }
[data-theme="dark"] .ic-sun { display: none; }
[data-theme="dark"] .ic-moon { display: block; }

.cart-btn { position: relative; }
.cart-count {
  position: absolute; top: 2px; right: 2px;
  min-width: 18px; height: 18px; padding: 0 4px;
  background: var(--accent); color: var(--accent-ink);
  border-radius: 999px; font-size: .7rem; font-weight: 700;
  display: grid; place-items: center;
}

/* ============ Configurator ============ */
.configurator { padding-top: clamp(1.5rem, 4vw, 3rem); padding-bottom: clamp(2rem, 5vw, 4rem); }
.breadcrumb ol { list-style: none; display: flex; flex-wrap: wrap; gap: .4rem; padding: 0; margin: 0 0 1.2rem; font-size: .85rem; color: var(--text-dim); }
.breadcrumb li:not(:last-child)::after { content: "/"; margin-left: .5rem; color: var(--text-dim); }
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--text); }

.cfg-layout { display: grid; gap: clamp(1.5rem, 4vw, 3rem); }

/* Viewer */
.viewer { position: sticky; top: 80px; }
.viewer-stage {
  position: relative; border-radius: var(--radius-lg);
  background: radial-gradient(120% 120% at 50% 20%, var(--bg-grad-1), var(--bg-grad-2));
  border: 1px solid var(--border); overflow: hidden;
  aspect-ratio: 1 / 1; box-shadow: var(--shadow-2);
}
#glcanvas { width: 100%; height: 100%; cursor: grab; touch-action: none; }
#glcanvas.grabbing { cursor: grabbing; }
.viewer-fallback { position: absolute; inset: 0; display: grid; place-items: center; }
.viewer-fallback img { width: 100%; height: 100%; object-fit: cover; }
.viewer-hint {
  position: absolute; bottom: 12px; left: 50%; transform: translateX(-50%);
  margin: 0; font-size: .78rem; color: var(--text-muted);
  background: color-mix(in srgb, var(--bg) 70%, transparent);
  padding: .35rem .8rem; border-radius: 999px; border: 1px solid var(--border);
  pointer-events: none;
}
.viewer-controls { display: flex; align-items: center; gap: 1rem; margin-top: 1rem; flex-wrap: wrap; }
.gallery { display: flex; gap: .5rem; }
.thumb {
  width: 54px; height: 54px; border-radius: 12px; padding: 4px;
  background: var(--surface-2); border: 1px solid var(--border);
  transition: border-color var(--t), transform var(--t-fast);
}
.thumb:hover { transform: translateY(-2px); }
.thumb.is-active { border-color: var(--accent); }
.thumb svg { width: 100%; height: 100%; }
.thumb .t-band { fill: #243049; }
.thumb .t-case { fill: #b7bcc2; }
.thumb .t-screen { fill: #0b0d12; }

.light-control { display: flex; align-items: center; gap: .6rem; font-size: .82rem; color: var(--text-muted); margin-left: auto; }
.light-control input[type="range"] { width: 120px; accent-color: var(--accent); }

/* Config panel */
.pill {
  display: inline-block; font-size: .72rem; font-weight: 700; letter-spacing: .06em;
  text-transform: uppercase; color: var(--accent);
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  padding: .3rem .7rem; border-radius: 999px; margin-bottom: .9rem;
}
.cfg-title { margin-bottom: .15rem; }
.cfg-tagline { color: var(--text-muted); font-size: 1.05rem; margin-bottom: .8rem; }
.cfg-rating { display: flex; align-items: center; gap: .5rem; font-size: .88rem; color: var(--text-muted); margin-bottom: 1rem; }
.cfg-rating .stars { color: var(--star); letter-spacing: 2px; }
.cfg-desc { color: var(--text-muted); margin-bottom: 1.3rem; }

.cfg-price-block { display: flex; align-items: baseline; gap: .7rem; flex-wrap: wrap; margin-bottom: 1.6rem; }
.cfg-price { font-size: 2rem; font-weight: 750; letter-spacing: -.02em; }
.cfg-compare { color: var(--text-dim); text-decoration: line-through; font-size: 1.1rem; }
.cfg-save { color: var(--success); font-weight: 700; background: color-mix(in srgb, var(--success) 16%, transparent); padding: .15rem .55rem; border-radius: 999px; font-size: .85rem; }

/* Option groups */
.opt-groups { display: grid; gap: 1.3rem; }
.opt-group { border: 0; padding: 0; margin: 0; min-width: 0; }
.opt-legend { display: flex; justify-content: space-between; align-items: baseline; width: 100%; padding: 0; font-size: .8rem; text-transform: uppercase; letter-spacing: .07em; color: var(--text-dim); font-weight: 700; margin-bottom: .6rem; }
.opt-value { color: var(--text); text-transform: none; letter-spacing: 0; font-weight: 600; font-size: .9rem; }
.opt-list { display: flex; flex-wrap: wrap; gap: .55rem; }

.opt-btn {
  display: inline-flex; align-items: center; gap: .5rem;
  background: var(--surface-2); border: 1.5px solid var(--border);
  border-radius: 12px; padding: .55rem .8rem; color: var(--text);
  transition: border-color var(--t), background var(--t), transform var(--t-fast);
}
.opt-btn:hover { transform: translateY(-1px); border-color: var(--border-strong); }
.opt-btn.is-selected { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 10%, var(--surface-2)); }
.opt-btn.is-unavailable { opacity: .4; }
.opt-btn.is-unavailable::after { content: "✕"; color: var(--danger); font-size: .75rem; }
.opt-swatch { width: 22px; height: 22px; border-radius: 50%; border: 1px solid rgba(255,255,255,.18); box-shadow: inset 0 0 6px rgba(0,0,0,.4); }
.opt-tag { display: grid; place-items: center; min-width: 22px; height: 22px; font-size: .8rem; font-weight: 700; color: var(--text-muted); }
.opt-label { font-size: .9rem; font-weight: 550; }
.opt-delta { font-size: .8rem; color: var(--text-muted); }

.opt-size .opt-btn, .opt-finish .opt-btn { padding: .5rem 1rem; }

/* Engraving */
.engraving { margin-top: 1.4rem; }
.engraving label { display: block; font-size: .8rem; text-transform: uppercase; letter-spacing: .07em; color: var(--text-dim); font-weight: 700; margin-bottom: .5rem; }
.engraving input, .search input, .fit-input-row input, .coupon input, #asstInput, .co-field input, .co-field select {
  width: 100%; background: var(--surface-2); border: 1.5px solid var(--border);
  border-radius: 12px; padding: .7rem .9rem; color: var(--text); font-size: .95rem;
  transition: border-color var(--t), background var(--t);
}
.engraving input:focus, .search input:focus, .fit-input-row input:focus, .coupon input:focus,
#asstInput:focus, .co-field input:focus, .co-field select:focus {
  outline: none; border-color: var(--accent); background: var(--surface);
}
.engraving-hint { font-size: .8rem; color: var(--text-muted); margin: .5rem 0 0; }

.cfg-stock { font-size: .9rem; font-weight: 600; margin: 1.3rem 0; display: flex; align-items: center; gap: .45rem; }
.cfg-stock::before { content: ""; width: 9px; height: 9px; border-radius: 50%; background: var(--text-dim); }
.cfg-stock.is-in { color: var(--success); } .cfg-stock.is-in::before { background: var(--success); }
.cfg-stock.is-low { color: var(--warn); } .cfg-stock.is-low::before { background: var(--warn); }
.cfg-stock.is-out { color: var(--danger); } .cfg-stock.is-out::before { background: var(--danger); }

.cfg-actions { display: flex; gap: .8rem; flex-wrap: wrap; }
.cfg-actions .btn-primary { flex: 1 1 auto; }
#addToCartBtn.is-added { background: var(--success); }

.trust-row { list-style: none; display: flex; flex-wrap: wrap; gap: 1rem; padding: 1.4rem 0 0; margin: 0; font-size: .82rem; color: var(--text-muted); }

/* ============ Fit finder ============ */
.fit { padding-block: clamp(1rem, 3vw, 2rem); }
.fit-card {
  background: linear-gradient(135deg, var(--surface), var(--surface-2));
  border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: clamp(1.3rem, 4vw, 2.2rem); display: grid; gap: 1.4rem;
}
.fit-form label { display: block; font-size: .85rem; color: var(--text-muted); margin-bottom: .5rem; }
.fit-input-row { display: flex; gap: .6rem; flex-wrap: wrap; }
.fit-input-row input { max-width: 160px; }
.fit-result { margin: .9rem 0 0; font-size: .92rem; font-weight: 550; }
.fit-result.is-ok { color: var(--success); }
.fit-result.is-error { color: var(--danger); }

/* ============ Bundle ============ */
.bundle { padding-block: clamp(1.5rem, 4vw, 3rem); }
.bundle-card { display: grid; gap: 1.5rem; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: clamp(1.3rem, 4vw, 2rem); }
.bundle-items { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }
.bundle-item { display: flex; align-items: center; gap: .8rem; }
.bundle-thumb { width: 60px; height: 60px; border-radius: 14px; background: var(--surface-2); display: grid; place-items: center; border: 1px solid var(--border); }
.bundle-thumb svg { width: 40px; height: 40px; color: var(--text-muted); }
.bundle-meta { display: flex; flex-direction: column; }
.bundle-name { font-weight: 600; font-size: .92rem; }
.bundle-price { color: var(--text-muted); font-size: .85rem; }
.bundle-plus { font-size: 1.4rem; color: var(--text-dim); font-weight: 300; }
.bundle-aside { display: flex; flex-direction: column; gap: .3rem; }
.bundle-combined-label { margin: 0; font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; color: var(--text-dim); }
.bundle-combined { margin: 0; font-size: 1.6rem; font-weight: 750; display: flex; align-items: baseline; gap: .6rem; }
.bundle-was { color: var(--text-dim); font-size: 1rem; font-weight: 400; }
.bundle-saved { color: var(--success); font-weight: 650; font-size: .9rem; margin: 0 0 .6rem; }

/* ============ Features ============ */
.features { padding-block: clamp(2rem, 5vw, 3.5rem); }
.feature-grid { display: grid; grid-template-columns: 1fr; gap: 1rem; }
.feature { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.4rem; transition: transform var(--t), border-color var(--t); }
.feature:hover { transform: translateY(-3px); border-color: var(--border-strong); }
.feature h3 { font-size: 1.05rem; margin-bottom: .3rem; }
.feature p { color: var(--text-muted); font-size: .9rem; margin: 0; }

/* ============ Shop / catalog ============ */
.shop { padding-block: clamp(2rem, 5vw, 3.5rem); }
.shop-head { display: flex; flex-direction: column; gap: 1rem; margin-bottom: 1.2rem; }
.search { width: 100%; }
.search input { max-width: 420px; }
.cat-filters { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: 1.4rem; }
.filter-chip {
  background: var(--surface-2); border: 1px solid var(--border); color: var(--text-muted);
  padding: .4rem .9rem; border-radius: 999px; font-size: .85rem; font-weight: 550;
  transition: background var(--t), color var(--t), border-color var(--t);
}
.filter-chip:hover { color: var(--text); }
.filter-chip.is-active { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }

.catalog-grid { display: grid; grid-template-columns: 1fr; gap: 1.1rem; }
.product-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg);
  overflow: hidden; display: flex; flex-direction: column;
  transition: transform var(--t), border-color var(--t), box-shadow var(--t);
}
.product-card:hover { transform: translateY(-4px); border-color: var(--border-strong); box-shadow: var(--shadow-2); }
.product-media { position: relative; aspect-ratio: 16 / 11; display: grid; place-items: center; background: radial-gradient(120% 120% at 50% 25%, var(--surface-2), var(--surface)); border-bottom: 1px solid var(--border); }
.product-media svg { width: 56%; height: 56%; color: var(--text-muted); }
.product-badge { position: absolute; top: 12px; left: 12px; font-size: .7rem; font-weight: 700; background: var(--accent); color: var(--accent-ink); padding: .25rem .6rem; border-radius: 999px; }
.product-body { padding: 1.1rem 1.2rem 1.3rem; display: flex; flex-direction: column; gap: .35rem; flex: 1; }
.product-cat { font-size: .72rem; text-transform: uppercase; letter-spacing: .06em; color: var(--text-dim); font-weight: 700; }
.product-name { font-size: 1.1rem; margin: 0; }
.product-tagline { color: var(--text-muted); font-size: .88rem; margin: 0; flex: 1; }
.product-rating { display: flex; align-items: center; gap: .35rem; font-size: .82rem; color: var(--text-muted); }
.rating-num { font-weight: 600; color: var(--text); }
.star { color: var(--star); }
.star-empty { color: var(--border-strong); }
.star-half { background: linear-gradient(90deg, var(--star) 50%, var(--border-strong) 50%); -webkit-background-clip: text; background-clip: text; color: transparent; }
.product-price-row { display: flex; align-items: baseline; gap: .5rem; margin-top: .3rem; }
.product-price { font-size: 1.15rem; font-weight: 700; }
.product-was { text-decoration: line-through; color: var(--text-dim); font-size: .9rem; }
.product-action { margin-top: .7rem; }
.catalog-empty { color: var(--text-muted); padding: 2rem 0; text-align: center; }

/* ============ Reviews ============ */
.reviews { padding-block: clamp(2rem, 5vw, 3.5rem); }
.review-list { display: grid; grid-template-columns: 1fr; gap: 1.1rem; }
.review { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.4rem; margin: 0; }
.review-stars { color: var(--star); letter-spacing: 2px; margin-bottom: .6rem; }
.review-text { font-family: var(--serif); font-size: 1.02rem; line-height: 1.5; margin: 0 0 .9rem; }
.review-by { font-size: .85rem; color: var(--text-muted); font-weight: 600; }
.review-by span { color: var(--text-dim); font-weight: 400; }

/* ============ Footer ============ */
.site-footer { border-top: 1px solid var(--border); margin-top: 2rem; padding-block: 2rem; }
.footer-inner { display: flex; flex-direction: column; gap: .4rem; }
.footer-inner .brand-text { letter-spacing: .14em; font-weight: 800; }
.footer-inner p { color: var(--text-muted); font-size: .85rem; margin: 0; }

/* ============ Overlay ============ */
.overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,.5); z-index: 90;
  opacity: 0; visibility: hidden; transition: opacity var(--t), visibility var(--t);
  backdrop-filter: blur(2px);
}
.overlay.is-open { opacity: 1; visibility: visible; }

/* ============ Cart drawer ============ */
.cart-drawer {
  position: fixed; top: 0; right: 0; z-index: 100;
  width: min(420px, 100vw); height: 100dvh;
  background: var(--bg); border-left: 1px solid var(--border);
  display: flex; flex-direction: column;
  transform: translateX(100%); transition: transform var(--t) var(--ease);
  box-shadow: var(--shadow-2);
}
.cart-drawer.is-open { transform: translateX(0); }
.cart-header { display: flex; align-items: center; justify-content: space-between; padding: 1.1rem 1.2rem; border-bottom: 1px solid var(--border); }
.cart-header h2 { margin: 0; font-size: 1.15rem; }

.cart-free { padding: .9rem 1.2rem; border-bottom: 1px solid var(--border); }
.cart-free-msg { margin: 0 0 .5rem; font-size: .82rem; color: var(--text-muted); }
.cart-free-track { height: 6px; background: var(--surface-3); border-radius: 999px; overflow: hidden; }
.cart-free-fill { height: 100%; width: 0; background: linear-gradient(90deg, var(--accent), var(--accent-strong)); border-radius: 999px; transition: width var(--t) var(--ease); }

.cart-body { flex: 1; overflow-y: auto; padding: .6rem 1.2rem; }
.cart-items { display: flex; flex-direction: column; gap: .9rem; padding: .6rem 0; }
.cart-line { display: grid; grid-template-columns: 56px 1fr auto; gap: .8rem; padding-bottom: .9rem; border-bottom: 1px solid var(--border); }
.cart-thumb { width: 56px; height: 56px; border-radius: 12px; background: var(--surface-2); display: grid; place-items: center; border: 1px solid var(--border); color: var(--text-muted); }
.cart-thumb svg { width: 38px; height: 38px; }
.cart-line-body { min-width: 0; }
.cart-line-name { font-size: .95rem; margin: 0 0 .15rem; }
.cart-line-config, .cart-line-engraved { font-size: .76rem; color: var(--text-muted); margin: 0 0 .15rem; }
.cart-line-engraved { font-style: italic; }
.cart-break-badge { display: inline-block; font-size: .7rem; color: var(--success); background: color-mix(in srgb, var(--success) 15%, transparent); padding: .1rem .45rem; border-radius: 999px; margin: .2rem 0; }
.cart-line-controls { display: flex; align-items: center; gap: .8rem; margin-top: .4rem; }
.qty-stepper { display: inline-flex; align-items: center; border: 1px solid var(--border); border-radius: 999px; overflow: hidden; }
.qty-btn { width: 30px; height: 30px; border: 0; background: var(--surface-2); color: var(--text); font-size: 1rem; line-height: 1; transition: background var(--t); }
.qty-btn:hover { background: var(--surface-3); }
.qty-val { min-width: 28px; text-align: center; font-size: .9rem; font-weight: 600; }
.cart-remove { background: none; border: 0; color: var(--text-dim); font-size: .8rem; text-decoration: underline; padding: 0; }
.cart-remove:hover { color: var(--danger); }
.cart-line-price { text-align: right; }
.cart-line-total { font-weight: 650; font-size: .95rem; display: block; }
.cart-line-was { font-size: .78rem; color: var(--text-dim); text-decoration: line-through; }

.cart-empty { text-align: center; padding: 3rem 1rem; color: var(--text-muted); }

.cart-foot { border-top: 1px solid var(--border); padding: 1rem 1.2rem 1.3rem; background: var(--surface); }
.coupon { display: flex; gap: .5rem; }
.coupon input { flex: 1; }
.coupon-msg { font-size: .8rem; margin: .5rem 0 0; min-height: 1em; }
.coupon-msg.is-ok { color: var(--success); }
.coupon-msg.is-bad { color: var(--danger); }
.coupon-remove { background: none; border: 0; color: var(--text-dim); text-decoration: underline; font-size: .78rem; padding: 0; margin-top: .5rem; }

.cart-summary { margin: 1rem 0; }
.summary-rows, .summary-row { display: block; }
.summary-row { display: flex; justify-content: space-between; font-size: .88rem; color: var(--text-muted); padding: .22rem 0; }
.summary-row.is-save { color: var(--success); }
.summary-total { display: flex; justify-content: space-between; align-items: baseline; margin-top: .7rem; padding-top: .7rem; border-top: 1px solid var(--border); font-weight: 700; }
.summary-total-val { font-size: 1.35rem; }

/* ============ Assistant ============ */
.assistant-fab {
  position: fixed; right: 18px; bottom: 18px; z-index: 95;
  display: inline-flex; align-items: center; gap: .5rem;
  background: var(--accent); color: var(--accent-ink);
  border: 0; border-radius: 999px; padding: .8rem 1.2rem; font-weight: 700;
  box-shadow: 0 10px 30px -8px var(--accent);
  transition: transform var(--t-fast), box-shadow var(--t);
}
.assistant-fab:hover { transform: translateY(-2px); }
.assistant-fab svg { width: 22px; height: 22px; }

.assistant-panel {
  position: fixed; right: 18px; bottom: 18px; z-index: 110;
  width: min(400px, calc(100vw - 24px)); height: min(640px, calc(100dvh - 36px));
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius-lg);
  display: flex; flex-direction: column; overflow: hidden;
  transform: translateY(20px) scale(.97); opacity: 0; visibility: hidden;
  transform-origin: bottom right; transition: opacity var(--t), transform var(--t) var(--ease), visibility var(--t);
  box-shadow: var(--shadow-2);
}
.assistant-panel.is-open { opacity: 1; visibility: visible; transform: translateY(0) scale(1); }
.asst-header { display: flex; justify-content: space-between; gap: 1rem; padding: 1rem 1.1rem; border-bottom: 1px solid var(--border); background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 12%, var(--surface)), var(--surface)); }
.asst-header h2 { margin: 0; font-size: 1.05rem; }
.asst-sub { margin: .2rem 0 0; font-size: .78rem; color: var(--text-muted); }
.asst-messages { flex: 1; overflow-y: auto; padding: 1rem; display: flex; flex-direction: column; gap: .8rem; }
.asst-msg { max-width: 92%; }
.asst-you { align-self: flex-end; text-align: right; }
.asst-me { align-self: flex-start; }
.asst-who { font-size: .68rem; text-transform: uppercase; letter-spacing: .06em; color: var(--text-dim); font-weight: 700; }
.asst-text { margin: .25rem 0 0; padding: .6rem .85rem; border-radius: 14px; font-size: .9rem; line-height: 1.45; }
.asst-me .asst-text { background: var(--surface-2); border: 1px solid var(--border); border-bottom-left-radius: 4px; }
.asst-you .asst-text { background: var(--accent); color: var(--accent-ink); border-bottom-right-radius: 4px; display: inline-block; }

.asst-plan { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: .8rem; display: flex; flex-direction: column; gap: .5rem; }
.asst-step { display: flex; align-items: center; gap: .6rem; font-size: .86rem; color: var(--text-muted); }
.asst-step.is-done { color: var(--text); }
.asst-step.is-cancelled { opacity: .5; text-decoration: line-through; }
.asst-spin { width: 16px; height: 16px; border-radius: 50%; border: 2px solid var(--border-strong); border-top-color: var(--accent); animation: spin .7s linear infinite; flex: none; }
.asst-step.is-done .asst-spin { border: 0; }
.asst-step.is-done .asst-spin::before { content: "✓"; color: var(--success); font-weight: 700; }
@keyframes spin { to { transform: rotate(360deg); } }
.asst-stop { align-self: flex-start; background: var(--surface-3); border: 1px solid var(--border); color: var(--text-muted); border-radius: 999px; padding: .25rem .7rem; font-size: .76rem; }
.asst-plan-foot { display: flex; flex-wrap: wrap; gap: .5rem; align-items: center; margin-top: .4rem; padding-top: .6rem; border-top: 1px solid var(--border); }
.asst-summary { width: 100%; margin: 0 0 .2rem; font-size: .84rem; font-weight: 600; }
.asst-action { background: var(--accent); color: var(--accent-ink); border: 0; border-radius: 999px; padding: .35rem .9rem; font-size: .8rem; font-weight: 600; }
.asst-action-ghost { background: var(--surface-3); color: var(--text); border: 1px solid var(--border); }
.asst-action:disabled { opacity: .6; }

.asst-suggest { display: flex; gap: .45rem; overflow-x: auto; padding: .6rem 1rem; border-top: 1px solid var(--border); }
.asst-chip { white-space: nowrap; background: var(--surface-2); border: 1px solid var(--border); color: var(--text); border-radius: 999px; padding: .4rem .8rem; font-size: .8rem; transition: background var(--t); }
.asst-chip:hover { background: var(--surface-3); }
.asst-form { display: flex; gap: .5rem; padding: .8rem 1rem 1rem; border-top: 1px solid var(--border); }
.asst-form input { flex: 1; }

/* ============ Checkout ============ */
.checkout { padding-block: clamp(1.5rem, 4vw, 3rem); }
.co-back { color: var(--text-muted); margin-left: auto; font-size: .9rem; }
.co-back:hover { color: var(--text); }
.co-title { margin-bottom: 1.4rem; }
.co-indicator { list-style: none; display: flex; flex-wrap: wrap; gap: .6rem 1.2rem; padding: 0; margin: 0 0 2rem; }
.co-step { display: flex; align-items: center; gap: .5rem; font-size: .85rem; color: var(--text-dim); }
.co-step-num { width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center; background: var(--surface-2); border: 1px solid var(--border); font-size: .8rem; font-weight: 700; }
.co-step.is-active { color: var(--text); }
.co-step.is-active .co-step-num { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.co-step.is-done .co-step-num { background: var(--success); color: #04140c; border-color: var(--success); }

.co-layout { display: grid; gap: 1.6rem; align-items: start; }
.co-main { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: clamp(1.2rem, 4vw, 2rem); }
.co-main:focus { outline: none; }
.co-h { font-size: 1.3rem; margin-bottom: 1.2rem; }

.co-lines { display: flex; flex-direction: column; gap: 1rem; }
.co-line { display: grid; grid-template-columns: 64px 1fr auto; gap: 1rem; padding-bottom: 1rem; border-bottom: 1px solid var(--border); }
.co-line-thumb { width: 64px; height: 64px; border-radius: 12px; background: var(--surface-2); display: grid; place-items: center; border: 1px solid var(--border); color: var(--text-muted); }
.co-line-thumb svg { width: 42px; height: 42px; }
.co-line-body h3 { font-size: 1rem; margin: 0 0 .25rem; }
.co-line-config { font-size: .8rem; color: var(--text-muted); margin: 0 0 .2rem; }
.co-line-qty { display: flex; align-items: center; gap: .6rem; margin-top: .5rem; }
.co-line-qty span { min-width: 22px; text-align: center; font-weight: 600; }
.co-line-remove { background: none; border: 0; color: var(--text-dim); text-decoration: underline; font-size: .8rem; }
.co-line-remove:hover { color: var(--danger); }
.co-line-price { font-weight: 650; }

.co-form { display: flex; flex-direction: column; gap: 1.4rem; }
.co-fieldset { border: 0; padding: 0; margin: 0; display: flex; flex-direction: column; gap: .9rem; }
.co-fieldset legend { font-size: .78rem; text-transform: uppercase; letter-spacing: .07em; color: var(--text-dim); font-weight: 700; padding: 0; margin-bottom: .3rem; }
.co-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: .9rem; }
.co-field { display: flex; flex-direction: column; gap: .35rem; }
.co-field label { font-size: .82rem; color: var(--text-muted); font-weight: 550; }
.co-field input.is-invalid, .co-field select.is-invalid { border-color: var(--danger); }
.co-err { font-size: .76rem; color: var(--danger); min-height: 1em; }

.co-options { display: grid; gap: .7rem; }
.co-radio { display: flex; align-items: center; gap: .8rem; border: 1.5px solid var(--border); border-radius: 14px; padding: .9rem 1rem; cursor: pointer; transition: border-color var(--t), background var(--t); }
.co-radio:hover { border-color: var(--border-strong); }
.co-radio:has(input:checked) { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 8%, var(--surface)); }
.co-radio input { accent-color: var(--accent); width: 18px; height: 18px; }
.co-radio-body { display: flex; flex-direction: column; flex: 1; }
.co-radio-title { font-weight: 600; }
.co-radio-desc { font-size: .82rem; color: var(--text-muted); }
.co-radio-price { font-weight: 650; }
.co-note { font-size: .8rem; color: var(--text-muted); }

.co-confirm-grid { display: grid; gap: 1rem; grid-template-columns: 1fr; }
.co-confirm-block { background: var(--surface-2); border: 1px solid var(--border); border-radius: 14px; padding: 1.1rem; }
.co-confirm-block h3 { font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; color: var(--text-dim); margin: 0 0 .4rem; }
.co-confirm-block h3:not(:first-child) { margin-top: 1rem; }
.co-confirm-block p { margin: 0; font-size: .92rem; line-height: 1.5; }
.co-edit { background: none; border: 0; color: var(--accent); text-decoration: underline; font-size: .82rem; padding: 0; margin-top: .8rem; }

.co-nav { display: flex; justify-content: space-between; gap: 1rem; margin-top: 1.8rem; }
.co-nav .btn-primary { min-width: 160px; }

/* Order summary aside */
.co-aside { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 1.3rem; position: sticky; top: 84px; }
.co-sum-title { font-size: 1.05rem; margin: 0; }
.co-sum-count { font-size: .82rem; color: var(--text-muted); margin: .2rem 0 1rem; }
.co-sum-lines { display: flex; flex-direction: column; gap: .8rem; margin-bottom: 1rem; }
.co-sum-line { display: grid; grid-template-columns: 40px 1fr auto; gap: .7rem; align-items: center; }
.co-sum-thumb { width: 40px; height: 40px; border-radius: 10px; background: var(--surface-2); display: grid; place-items: center; border: 1px solid var(--border); color: var(--text-muted); }
.co-sum-thumb svg { width: 26px; height: 26px; }
.co-sum-info { display: flex; flex-direction: column; min-width: 0; }
.co-sum-name { font-size: .85rem; font-weight: 600; }
.co-sum-config { font-size: .72rem; color: var(--text-muted); }
.co-sum-price { font-size: .85rem; font-weight: 600; }
.co-sum-rows { border-top: 1px solid var(--border); padding-top: .8rem; }
.co-sum-row { display: flex; justify-content: space-between; font-size: .85rem; color: var(--text-muted); padding: .2rem 0; }
.co-sum-row.is-save { color: var(--success); }
.co-sum-total { display: flex; justify-content: space-between; font-weight: 750; font-size: 1.2rem; margin-top: .7rem; padding-top: .7rem; border-top: 1px solid var(--border); }

/* Confirmation */
.co-done { text-align: center; max-width: 560px; margin-inline: auto; }
.co-done-badge { width: 64px; height: 64px; border-radius: 50%; background: var(--success); color: #04140c; display: grid; place-items: center; font-size: 2rem; font-weight: 700; margin: 0 auto 1.2rem; animation: pop .5s var(--ease); }
@keyframes pop { 0% { transform: scale(0); } 70% { transform: scale(1.12); } 100% { transform: scale(1); } }
.co-done-title { font-size: clamp(1.5rem, 4vw, 2.1rem); }
.co-done-sub { color: var(--text-muted); }
.co-done-meta { display: grid; gap: 1rem; grid-template-columns: 1fr; margin: 1.6rem 0; text-align: left; background: var(--surface-2); border: 1px solid var(--border); border-radius: 14px; padding: 1.2rem; }
.co-done-meta dt { font-size: .76rem; text-transform: uppercase; letter-spacing: .06em; color: var(--text-dim); }
.co-done-meta dd { margin: .2rem 0 0; font-weight: 600; }
.co-order-no { font-family: ui-monospace, "SF Mono", Menlo, monospace; color: var(--accent); }
.co-done-summary { text-align: left; background: var(--surface-2); border: 1px solid var(--border); border-radius: 14px; padding: 1.2rem; margin-bottom: 1.6rem; }
.co-layout.is-confirmed { grid-template-columns: 1fr; }
.co-empty { text-align: center; padding: 3rem 1rem; display: flex; flex-direction: column; gap: 1.2rem; align-items: center; }

/* ============ Responsive ============ */
@media (min-width: 600px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .catalog-grid { grid-template-columns: repeat(2, 1fr); }
  .review-list { grid-template-columns: repeat(2, 1fr); }
  .bundle-card { grid-template-columns: 1fr auto; align-items: center; }
  .fit-card { grid-template-columns: 1fr 1fr; align-items: center; }
  .co-confirm-grid { grid-template-columns: 1fr 1fr; }
  .co-done-meta { grid-template-columns: repeat(3, 1fr); }
  .shop-head { flex-direction: row; align-items: center; justify-content: space-between; }
}

@media (min-width: 880px) {
  .main-nav { display: flex; }
  .cfg-layout { grid-template-columns: 1.05fr 1fr; align-items: start; }
  .feature-grid { grid-template-columns: repeat(4, 1fr); }
  .catalog-grid { grid-template-columns: repeat(3, 1fr); }
  .review-list { grid-template-columns: repeat(3, 1fr); }
  .co-layout { grid-template-columns: 1.6fr 1fr; }
  .co-layout.is-confirmed { grid-template-columns: 1fr; }
  .fab-label { display: inline; }
}

@media (max-width: 879px) {
  .viewer { position: static; }
}

@media (max-width: 520px) {
  .fab-label { display: none; }
  .assistant-fab { padding: .9rem; }
  .header-controls { gap: .25rem; }
  .header-inner { flex-wrap: wrap; row-gap: .4rem; padding-block: .5rem; }
  .segmented button { padding: .3rem .5rem; }
  .icon-btn { width: 38px; height: 38px; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
}