:root {
  color-scheme: light;
  --bg: #f6f7f2;
  --panel: #ffffff;
  --ink: #171a1f;
  --muted: #606975;
  --line: #dfe3da;
  --accent: #0f766e;
  --accent-dark: #0b4f4a;
  --warm: #f2b705;
  --shadow: 0 18px 50px rgba(23, 26, 31, 0.11);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

a {
  color: var(--accent-dark);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

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

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(20px, 5vw, 72px);
  background: rgba(246, 247, 242, 0.92);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: var(--ink);
  color: #fff;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.95rem;
}

.nav a {
  color: var(--muted);
  font-weight: 650;
  text-decoration: none;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 520px);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
  min-height: calc(100vh - 72px);
  padding: clamp(44px, 7vw, 92px) clamp(20px, 5vw, 72px);
  border-bottom: 1px solid var(--line);
}

.hero-copy {
  max-width: 760px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent-dark);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  max-width: 900px;
  font-size: clamp(2.55rem, 6vw, 5.8rem);
  line-height: 0.98;
  letter-spacing: 0;
}

h2 {
  margin: 0;
  font-size: clamp(1.8rem, 3vw, 3rem);
  line-height: 1.08;
  letter-spacing: 0;
}

h3 {
  margin: 0 0 8px;
  font-size: 1.08rem;
  line-height: 1.25;
}

.lead {
  max-width: 680px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: clamp(1.06rem, 1.6vw, 1.28rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 18px;
  border-radius: 8px;
  font-weight: 800;
  text-decoration: none;
}

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

.button.secondary {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
}

.hero-product {
  display: block;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  overflow: hidden;
  text-decoration: none;
}

.hero-product img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: contain;
  padding: clamp(14px, 3vw, 30px);
}

.intro,
.categories,
.benefits,
.seo-text,
.faq {
  padding: clamp(52px, 7vw, 92px) clamp(20px, 5vw, 72px);
}

.intro {
  display: grid;
  grid-template-columns: minmax(240px, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(28px, 5vw, 72px);
  border-bottom: 1px solid var(--line);
}

.intro p,
.seo-text p,
.faq p {
  margin-top: 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.section-heading {
  max-width: 780px;
  margin-bottom: 28px;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.category-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.category-card a {
  display: block;
  color: var(--ink);
  text-decoration: none;
}

.category-card img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: contain;
  background: #f9faf7;
  padding: 14px;
}

.category-name {
  display: block;
  min-height: 58px;
  padding: 16px 16px 0;
  font-size: 1.08rem;
  font-weight: 850;
  line-height: 1.25;
}

.category-card p {
  margin: 8px 16px 18px;
  color: var(--muted);
  font-size: 0.96rem;
}

.benefits {
  background: #171a1f;
  color: #fff;
}

.benefits .eyebrow {
  color: var(--warm);
}

.benefit-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.benefit-list div {
  border-top: 1px solid rgba(255, 255, 255, 0.28);
  padding-top: 18px;
}

.benefit-list p {
  margin: 0;
  color: rgba(255, 255, 255, 0.76);
}

.seo-text {
  max-width: 1050px;
}

.seo-text h2 {
  margin-bottom: 18px;
}

.faq {
  border-top: 1px solid var(--line);
}

details {
  max-width: 900px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  margin-top: 12px;
  padding: 16px 18px;
}

summary {
  cursor: pointer;
  font-weight: 800;
}

details p {
  margin: 12px 0 0;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 24px clamp(20px, 5vw, 72px);
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.site-footer p {
  margin: 0;
}

@media (max-width: 980px) {
  .hero,
  .intro {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero-product {
    max-width: 560px;
  }

  .category-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .benefit-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .site-header,
  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav {
    gap: 12px;
  }

  .category-grid {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .button {
    width: 100%;
  }
}