:root {
  --bg: #ffffff;
  --surface: #ffffff;
  --soft: #f6f6f3;
  --text: #111111;
  --muted: #707070;
  --subtle: #909090;
  --line: #e7e7e2;
  --line-strong: #d6d6cf;
  --dark: #111111;
  --inverse: #ffffff;
  --accent: #b8181e;
  --max: 1240px;
  --radius-sm: 12px;
  --radius-md: 18px;
  --radius-lg: 28px;
  --shadow-sm: 0 8px 26px rgba(17, 17, 17, .05);
  --shadow-md: 0 20px 55px rgba(17, 17, 17, .09);
  --transition: 180ms ease;
}

html[data-theme="dark"] {
  --bg: #0d0e10;
  --surface: #141518;
  --soft: #181a1e;
  --text: #f4f4f1;
  --muted: #a6a8ac;
  --subtle: #81848a;
  --line: #292c31;
  --line-strong: #383b41;
  --dark: #f5f5f2;
  --inverse: #101114;
  --shadow-sm: 0 8px 26px rgba(0, 0, 0, .22);
  --shadow-md: 0 22px 70px rgba(0, 0, 0, .35);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--bg); }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
  transition: background-color .25s ease, color .25s ease;
}
a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; }
button { cursor: pointer; }
img { display: block; max-width: 100%; }

.site-header {
  position: sticky;
  top: 14px;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 14px;
  width: min(var(--max), 94vw);
  min-height: 68px;
  margin: 14px auto 0;
  padding: 10px 14px 10px 18px;
  background: color-mix(in srgb, var(--surface) 90%, transparent);
  backdrop-filter: blur(18px);
  border: 1px solid color-mix(in srgb, var(--line) 88%, transparent);
  border-radius: 20px;
  box-shadow: var(--shadow-sm);
}
.logo {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  line-height: 0;
}
.logo img {
  width: 148px;
  height: 48px;
  object-fit: contain;
  object-position: center;
  border-radius: 10px;
  background: #fff;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  font-size: .86rem;
}
.main-nav a {
  position: relative;
  padding: 10px 12px;
  color: var(--muted);
  border-radius: 10px;
  transition: background var(--transition), color var(--transition);
}
.main-nav a:hover,
.main-nav a.active {
  background: var(--soft);
  color: var(--text);
}
.main-nav a::after { display: none !important; }
.cart-count {
  display: inline-grid;
  place-items: center;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  margin-left: 3px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-size: .67rem;
}
.menu-toggle,
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  min-height: 40px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  color: var(--text);
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}
.menu-toggle:hover,
.theme-toggle:hover { transform: translateY(-1px); border-color: var(--line-strong); }
.menu-toggle { display: none; }
.theme-toggle { margin-left: 0; font-size: .74rem; white-space: nowrap; }
.theme-icon { font-size: .95rem; line-height: 1; }

.section {
  width: min(var(--max), 92vw);
  margin: 0 auto;
  padding: 100px 0;
}
.section-border { border-top: 1px solid var(--line); }
.section-soft {
  width: 100%;
  padding-left: max(4vw, calc((100% - var(--max))/2));
  padding-right: max(4vw, calc((100% - var(--max))/2));
  background: var(--soft);
}
.hero {
  min-height: 650px;
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 6vw;
  align-items: center;
}
.hero h1 {
  max-width: 720px;
  margin: 12px 0 22px;
  font-size: clamp(3.3rem, 7vw, 6.7rem);
  line-height: .93;
  letter-spacing: -.075em;
}
.hero-text { max-width: 540px; margin: 0 0 34px; color: var(--muted); font-size: 1.08rem; }
.eyebrow { margin: 0; color: var(--subtle); font-size: .68rem; font-weight: 800; letter-spacing: .18em; }
.hero-visual {
  min-height: 450px;
  display: grid;
  place-items: center;
  padding: 28px;
  background: linear-gradient(145deg, var(--soft), var(--surface));
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}
.hero-logo-card {
  width: min(100%, 430px);
  padding: 18px;
  background: #fff;
  border: 1px solid #ececea;
  border-radius: 24px;
  box-shadow: 0 18px 44px rgba(0,0,0,.08);
}
.hero-logo-card img { width: 100%; height: auto; border-radius: 14px; }
.hero-logo-caption {
  margin: 14px 4px 2px;
  color: #555;
  text-align: center;
  font-size: .72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .14em;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 14px;
  transition: transform var(--transition), background var(--transition), border-color var(--transition), color var(--transition), box-shadow var(--transition);
}
.button:hover { transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.button-dark { background: var(--dark); color: var(--inverse); }
.button-outline { background: var(--surface); color: var(--text); border-color: var(--line-strong); }
.button-wide { width: 100%; }

.benefits { display: grid; grid-template-columns: repeat(4,1fr); gap: 18px; }
.benefit {
  min-height: 175px;
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}
.number { color: var(--subtle); font-size: .7rem; font-weight: 700; }
.benefit h2, .steps h3 { margin: 17px 0 8px; font-size: 1rem; letter-spacing: -.02em; }
.benefit p, .steps p { margin: 0; color: var(--muted); font-size: .88rem; }

.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 34px; }
.section-heading h2,
.page-intro h1,
.info-section h2 {
  margin: 8px 0 0;
  font-size: clamp(2.2rem, 4vw, 4rem);
  letter-spacing: -.06em;
  line-height: 1;
}
.text-link { font-size: .82rem; color: var(--text); border-bottom: 1px solid var(--text); padding-bottom: 4px; }
.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.product-card {
  min-width: 0;
  padding: 9px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.product-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--line-strong); }
.product-image-wrap { position: relative; overflow: hidden; background: var(--soft); aspect-ratio: 1 / 1.08; border-radius: 14px; }
.product-image-wrap img { width: 100%; height: 100%; object-fit: cover; transition: transform .45s ease; }
.product-card:hover .product-image-wrap img { transform: scale(1.025); }
.product-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 7px 9px;
  background: rgba(255,255,255,.92);
  color: #222;
  border: 1px solid rgba(17,17,17,.08);
  border-radius: 999px;
  font-size: .62rem;
  text-transform: uppercase;
  letter-spacing: .08em;
}
.product-info { padding: 13px 4px 4px; }
.product-brand { margin: 0 0 2px; color: var(--subtle); font-size: .64rem; text-transform: uppercase; letter-spacing: .13em; }
.product-name { margin: 0; font-size: .95rem; font-weight: 650; letter-spacing: -.015em; }
.price-row { display: flex; align-items: baseline; gap: 8px; margin-top: 8px; }
.price { font-size: .91rem; font-weight: 800; }
.old-price { color: var(--subtle); font-size: .78rem; text-decoration: line-through; }
.stock-line { margin: 7px 0 0; color: var(--muted); font-size: .7rem; }
.card-action { margin-top: 12px; width: 100%; min-height: 42px; }

.category-grid { display: grid; grid-template-columns: repeat(5,1fr); gap: 12px; }
.category-card {
  min-height: 210px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}
.category-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-sm); background: var(--bg); }
.category-card span { color: var(--subtle); font-size: .68rem; }
.category-card strong { font-size: 1.25rem; letter-spacing: -.04em; }
.category-card em { font-size: .74rem; font-style: normal; color: var(--muted); }

.steps { display: grid; grid-template-columns: repeat(4,1fr); gap: 12px; }
.steps article {
  min-height: 210px;
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
}
.steps article > span { color: var(--subtle); font-size: .68rem; font-weight: 700; }

.info-section { max-width: none; width: 100%; padding-left: max(4vw, calc((100% - var(--max))/2)); padding-right: max(4vw, calc((100% - var(--max))/2)); }
.narrow-content { max-width: 720px; }
.narrow-content > p:not(.eyebrow) { color: var(--muted); }
.clean-list { padding: 0; margin: 28px 0; list-style: none; border-top: 1px solid var(--line); }
.clean-list li { padding: 13px 0; border-bottom: 1px solid var(--line); }
.muted { color: var(--subtle); font-size: .8rem; }

.faq-list { max-width: 900px; border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { padding: 20px 0; cursor: pointer; font-weight: 650; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; float: right; color: var(--subtle); }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { margin: 0 0 20px; color: var(--muted); }

.site-footer { margin-top: 40px; padding: 70px 4vw 25px; background: #111214; color: #fff; }
.footer-main { max-width: var(--max); margin: auto; display: grid; grid-template-columns: 1fr 1fr; gap: 60px; padding-bottom: 55px; }
.logo-footer { padding: 8px; background: #fff; border-radius: 14px; }
.logo-footer img { width: 168px; height: auto; border-radius: 9px; }
.footer-main p { max-width: 330px; color: #aaa; font-size: .84rem; }
.footer-links { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; }
.footer-links div { display: flex; flex-direction: column; gap: 10px; }
.footer-links strong { margin-bottom: 5px; font-size: .72rem; color: #777; text-transform: uppercase; letter-spacing: .1em; }
.footer-links a { color: #ccc; font-size: .82rem; }
.footer-links a:hover { color: #fff; }
.footer-legal { max-width: var(--max); margin: auto; padding: 25px 0; border-top: 1px solid #333; border-bottom: 1px solid #333; color: #888; font-size: .71rem; }
.footer-legal p { margin: 5px 0; }
.footer-bottom { max-width: var(--max); margin: auto; padding-top: 22px; display: flex; justify-content: space-between; gap: 20px; color: #666; font-size: .69rem; }

.page-intro { padding-bottom: 55px; }
.page-intro p:last-child { color: var(--muted); }
.shop-section { padding-top: 25px; }
.shop-toolbar { display: grid; grid-template-columns: 1fr 230px; gap: 20px; margin-bottom: 20px; }
.search-box, .sort-box { display: flex; flex-direction: column; gap: 8px; font-size: .68rem; color: var(--subtle); text-transform: uppercase; letter-spacing: .1em; }
input, select {
  width: 100%;
  min-height: 48px;
  padding: 0 14px;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: 13px;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}
input:focus, select:focus { border-color: var(--text); box-shadow: 0 0 0 4px color-mix(in srgb, var(--text) 8%, transparent); }
.filter-row { display: flex; flex-wrap: wrap; gap: 8px; padding-bottom: 22px; border-bottom: 1px solid var(--line); }
.filter-button { padding: 9px 14px; border: 1px solid var(--line-strong); border-radius: 999px; background: var(--surface); color: var(--text); font-size: .76rem; transition: background var(--transition), color var(--transition), border-color var(--transition); }
.filter-button.active { background: var(--dark); border-color: var(--dark); color: var(--inverse); }
.results-count { margin: 20px 0; color: var(--subtle); font-size: .74rem; }
.empty-state { padding: 80px 20px; text-align: center; border: 1px dashed var(--line-strong); border-radius: var(--radius-lg); background: var(--surface); }
.empty-state h2 { margin: 0 0 8px; letter-spacing: -.03em; }
.empty-state p { color: var(--muted); }
.hidden { display: none !important; }

.product-detail { display: grid; grid-template-columns: 1.1fr .9fr; gap: 7vw; padding-top: 70px; }
.gallery { min-width: 0; }
.main-product-image { width: 100%; aspect-ratio: 1 / 1; object-fit: cover; background: var(--soft); border-radius: var(--radius-lg); border: 1px solid var(--line); }
.thumbnails { display: grid; grid-template-columns: repeat(4,1fr); gap: 10px; margin-top: 10px; }
.thumb { padding: 0; border: 1px solid var(--line); background: var(--soft); aspect-ratio: 1; overflow: hidden; border-radius: 13px; }
.thumb.active { border-color: var(--text); }
.thumb img { width: 100%; height: 100%; object-fit: cover; }
.product-copy { align-self: center; }
.product-copy h1 { margin: 8px 0 16px; font-size: clamp(2.4rem, 5vw, 5rem); line-height: .95; letter-spacing: -.06em; }
.product-copy .description { color: var(--muted); max-width: 560px; }
.detail-price { margin: 20px 0; font-size: 1.2rem; font-weight: 800; }
.detail-price .old-price { margin-left: 8px; }
.product-meta { margin: 26px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.meta-row { display: flex; justify-content: space-between; gap: 20px; padding: 13px 0; border-bottom: 1px solid var(--line); font-size: .8rem; }
.meta-row:last-child { border-bottom: 0; }
.meta-row span:first-child { color: var(--subtle); }
.option-group { margin: 18px 0; }
.option-group legend { margin-bottom: 9px; font-size: .7rem; font-weight: 750; text-transform: uppercase; letter-spacing: .08em; }
.option-buttons { display: flex; flex-wrap: wrap; gap: 7px; }
.option-button { min-width: 45px; min-height: 40px; padding: 0 10px; border: 1px solid var(--line-strong); border-radius: 11px; background: var(--surface); color: var(--text); }
.option-button.selected { border-color: var(--dark); background: var(--dark); color: var(--inverse); }
.quantity-control { display: flex; width: max-content; align-items: center; border: 1px solid var(--line-strong); border-radius: 11px; overflow: hidden; }
.quantity-control button { width: 40px; height: 42px; border: 0; background: var(--surface); color: var(--text); }
.quantity-control span { min-width: 42px; text-align: center; }
.detail-add { width: 100%; margin-top: 18px; }
.out-of-stock { padding: 13px; background: var(--soft); color: var(--muted); font-size: .8rem; border-radius: 12px; }

.cart-layout, .checkout-layout { display: grid; grid-template-columns: 1fr 340px; gap: 50px; align-items: start; padding-top: 25px; }
.cart-item { display: grid; grid-template-columns: 110px 1fr auto; gap: 18px; align-items: center; padding: 18px 0; border-top: 1px solid var(--line); }
.cart-item-image { width: 110px; aspect-ratio: 1; object-fit: cover; background: var(--soft); border-radius: 15px; border: 1px solid var(--line); }
.cart-item h2 { margin: 0; font-size: 1rem; }
.cart-item p { margin: 3px 0; color: var(--subtle); font-size: .74rem; }
.cart-actions { display: flex; align-items: center; gap: 12px; margin-top: 10px; }
.small-quantity { display: flex; border: 1px solid var(--line-strong); border-radius: 10px; overflow: hidden; }
.small-quantity button { width: 30px; border: 0; background: var(--surface); color: var(--text); }
.small-quantity span { width: 32px; text-align: center; padding: 5px 0; font-size: .78rem; }
.remove-button { border: 0; padding: 5px 0; background: transparent; color: var(--subtle); font-size: .72rem; text-decoration: underline; }
.cart-item-total { font-weight: 800; font-size: .88rem; }
.summary-card {
  padding: 25px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 100px;
}
.summary-card h2 { margin-top: 0; font-size: 1rem; }
.summary-line { display: flex; justify-content: space-between; gap: 15px; padding: 11px 0; border-bottom: 1px solid var(--line); font-size: .8rem; }
.summary-total { display: flex; justify-content: space-between; margin: 20px 0; font-weight: 850; }
.empty-cart { padding: 70px 20px; border-top: 1px solid var(--line); text-align: center; }

.checkout-form { min-width: 0; }
.form-section { margin-bottom: 25px; }
.form-section h2 { margin: 0 0 22px; font-size: 1.2rem; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-grid label { display: flex; flex-direction: column; gap: 7px; font-size: .7rem; color: var(--subtle); text-transform: uppercase; letter-spacing: .08em; }
.form-grid .full { grid-column: 1 / -1; }
.form-message { min-height: 24px; color: var(--muted); font-size: .82rem; }

.toast { position: fixed; right: 20px; bottom: 20px; z-index: 50; max-width: 320px; padding: 13px 16px; background: var(--dark); color: var(--inverse); border: 1px solid var(--line); border-radius: 13px; box-shadow: var(--shadow-md); font-size: .8rem; opacity: 0; transform: translateY(12px); pointer-events: none; transition: opacity .2s ease, transform .2s ease; }
.toast.show { opacity: 1; transform: translateY(0); }
.error-state { padding: 70px 0; text-align: center; }
.error-state p { color: var(--muted); }

html[data-theme="dark"] .site-footer { background: #090a0c; }
html[data-theme="dark"] .product-badge { background: rgba(255,255,255,.94); color: #151515; }
html[data-theme="dark"] .hero-logo-card { box-shadow: 0 18px 50px rgba(0,0,0,.32); }

@media (max-width: 980px) {
  .main-nav { gap: 2px; }
  .main-nav a { padding-left: 9px; padding-right: 9px; }
  .hero { min-height: auto; grid-template-columns: 1fr; padding-top: 70px; }
  .hero-visual { min-height: 370px; }
  .benefits, .product-grid { grid-template-columns: repeat(2,1fr); }
  .category-grid { grid-template-columns: repeat(3,1fr); }
  .steps { grid-template-columns: repeat(2,1fr); }
  .product-detail { grid-template-columns: 1fr; gap: 45px; }
  .cart-layout, .checkout-layout { grid-template-columns: 1fr; }
  .summary-card { position: static; }
}

@media (max-width: 720px) {
  .site-header { top: 8px; width: 92vw; min-height: 62px; margin-top: 8px; padding: 8px 9px 8px 12px; }
  .logo img { width: 122px; height: 42px; }
  .menu-toggle { display: inline-flex; margin-left: auto; }
  .theme-toggle { min-width: 40px; padding: 0 10px; }
  .theme-toggle [data-theme-label] { display: none; }
  .main-nav {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 3px;
    padding: 8px;
    margin: 0;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 17px;
    box-shadow: var(--shadow-md);
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 13px; }
  .section { padding: 70px 0; width: 90vw; }
  .section-soft { width: 100%; padding-left: 5vw; padding-right: 5vw; }
  .hero { padding-top: 52px; }
  .hero h1 { font-size: clamp(3rem, 15vw, 5rem); }
  .hero-visual { min-height: 280px; padding: 18px; }
  .benefits, .product-grid, .category-grid { grid-template-columns: repeat(2,1fr); }
  .benefits { gap: 12px; }
  .benefit { min-height: 0; padding: 18px; }
  .category-card { min-height: 165px; padding: 15px; }
  .category-card strong { font-size: 1rem; }
  .steps { gap: 12px; }
  .steps article { min-height: 175px; padding: 18px; }
  .section-heading { align-items: start; flex-direction: column; }
  .shop-toolbar { grid-template-columns: 1fr; }
  .cart-item { grid-template-columns: 78px 1fr; }
  .cart-item-image { width: 78px; }
  .cart-item-total { grid-column: 2; }
  .form-grid { grid-template-columns: 1fr; }
  .form-grid .full { grid-column: auto; }
  .footer-main { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; }
}

@media (max-width: 480px) {
  .product-grid, .benefits, .category-grid { grid-template-columns: 1fr; }
  .product-card { padding: 8px; }
  .hero-logo-card { padding: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
}