:root {
  --color-bg: #eef1f4;
  --color-surface: #ffffff;
  --color-ink: #171a1f;
  --color-muted: #5a616c;
  --color-line: #cfd5dd;
  --color-accent: #1f4b63;
  --color-accent-ink: #f5f9fc;
  --color-hero-a: #d7e0e8;
  --color-hero-b: #b7c6b8;
  --font-display: "Trebuchet MS", "Gill Sans", "Lucida Grande", sans-serif;
  --font-body: "Segoe UI", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --radius: 0.35rem;
  --shadow-soft: 0 16px 36px rgba(23, 26, 31, 0.08);
  --content-width: 68rem;
  --header-height: 4.25rem;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--color-ink);
  background:
    radial-gradient(circle at 12% 0%, rgba(31, 75, 99, 0.1), transparent 34%),
    linear-gradient(180deg, #f5f7fa 0%, var(--color-bg) 45%, #e6eaef 100%);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

.skip-link {
  position: absolute;
  left: var(--space-2);
  top: -3rem;
  z-index: 1000;
  padding: 0.65rem 1rem;
  border-radius: var(--radius);
  background: var(--color-ink);
  color: var(--color-surface);
  text-decoration: none;
}

.skip-link:focus {
  top: var(--space-2);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  background: rgba(245, 247, 250, 0.9);
  border-bottom: 1px solid rgba(207, 213, 221, 0.95);
}

.site-header__inner,
.site-footer__inner,
.hero,
.catalog-region,
.about,
.checkout-cart {
  width: min(100% - 2rem, var(--content-width));
  margin-inline: auto;
}

.site-header__inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--space-2);
  min-height: var(--header-height);
}

.site-mark {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.2rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.site-mark__link {
  text-decoration: none;
}

.site-nav {
  justify-self: center;
}

.site-nav__list {
  display: flex;
  gap: var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav__list a {
  text-decoration: none;
  color: var(--color-muted);
}

.site-nav__list a:hover,
.site-nav__list a:focus-visible {
  color: var(--color-ink);
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  min-height: 2.5rem;
  padding: 0.45rem 0.85rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-surface);
  color: var(--color-ink);
  font: inherit;
  cursor: pointer;
}

.header-commerce {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  justify-self: end;
}

.commerce-status,
.cart-summary {
  margin: 0;
  font-size: 0.925rem;
}

.commerce-status {
  color: var(--color-muted);
}

.cart-summary {
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-surface);
}

.cart-summary__label {
  color: var(--color-muted);
}

.site-main {
  padding-block: var(--space-4) var(--space-5);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: var(--space-4);
  align-items: center;
  padding: var(--space-4);
  border: 1px solid rgba(207, 213, 221, 0.95);
  border-radius: calc(var(--radius) + 0.35rem);
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.96), rgba(236, 241, 246, 0.92));
  box-shadow: var(--shadow-soft);
}

.hero__copy h1 {
  margin: 0 0 var(--space-2);
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
}

.hero__subhead {
  margin: 0 0 var(--space-3);
  max-width: 34rem;
  color: var(--color-muted);
  font-size: 1.05rem;
}

.hero__actions {
  margin: 0;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.85rem;
  padding: 0.7rem 1.25rem;
  border-radius: var(--radius);
  text-decoration: none;
  transition: transform 160ms ease, background-color 160ms ease;
}

.button--primary {
  background: var(--color-accent);
  color: var(--color-accent-ink);
}

.button--primary:hover,
.button--primary:focus-visible {
  transform: translateY(-1px);
  background: #183c50;
}

.hero__visual {
  min-height: 18rem;
}

.hero__frame {
  height: 100%;
  min-height: 18rem;
  border-radius: calc(var(--radius) + 0.2rem);
  background:
    linear-gradient(160deg, rgba(255, 255, 255, 0.4), transparent 45%),
    linear-gradient(28deg, var(--color-hero-a), #c8d3dc 46%, var(--color-hero-b));
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.35);
}

.catalog-region,
.about,
.checkout-cart {
  margin-top: var(--space-5);
}

.section-intro {
  max-width: 40rem;
}

.section-intro h2,
.checkout-cart__title {
  margin: 0 0 var(--space-1);
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 2.5vw, 2rem);
  letter-spacing: -0.01em;
}

.section-intro p,
.checkout-cart__note {
  margin: 0;
  color: var(--color-muted);
}

.catalog {
  min-height: 12rem;
  margin-top: var(--space-3);
  padding: var(--space-4);
  border: 1px dashed var(--color-line);
  border-radius: calc(var(--radius) + 0.2rem);
  background: rgba(255, 255, 255, 0.58);
}

.checkout-cart {
  padding: var(--space-3);
  border: 1px solid var(--color-line);
  border-radius: calc(var(--radius) + 0.2rem);
  background: var(--color-surface);
}

.site-footer {
  border-top: 1px solid var(--color-line);
  background: rgba(255, 255, 255, 0.72);
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
  padding-block: var(--space-3);
}

.site-footer__mark {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.site-footer__note {
  margin: 0;
  color: var(--color-muted);
}

@media (max-width: 840px) {
  .site-header__inner {
    grid-template-columns: 1fr auto auto;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    justify-self: end;
  }

  .site-nav__list {
    position: fixed;
    inset: var(--header-height) 0 auto 0;
    display: none;
    flex-direction: column;
    gap: 0;
    padding: var(--space-2);
    background: rgba(245, 247, 250, 0.98);
    border-bottom: 1px solid var(--color-line);
    box-shadow: var(--shadow-soft);
  }

  .site-nav.is-open .site-nav__list {
    display: flex;
  }

  .site-nav__list a {
    display: block;
    padding: 0.9rem var(--space-2);
  }

  .hero {
    grid-template-columns: 1fr;
    padding: var(--space-3);
  }

  .hero__visual,
  .hero__frame {
    min-height: 14rem;
  }
}

@media (max-width: 560px) {
  .header-commerce {
    gap: 0.55rem;
  }

  .commerce-status {
    display: none;
  }

  .site-footer__inner {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .button,
  .button--primary:hover,
  .button--primary:focus-visible {
    transition: none;
    transform: none;
  }
}