:root {
  --ink: #161616;
  --muted: #626262;
  --line: #ded9cf;
  --paper: #f7f3eb;
  --panel: #fffaf1;
  --red: #d13b35;
  --blue: #246b8f;
  --green: #2f8061;
  --gold: #c99b45;
  --shadow: 0 22px 70px rgba(41, 34, 24, .16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(90deg, rgba(0, 0, 0, .035) 1px, transparent 1px),
    linear-gradient(0deg, rgba(0, 0, 0, .025) 1px, transparent 1px),
    var(--paper);
  background-size: 44px 44px;
  font-family: "Kanit", system-ui, sans-serif;
}

a {
  color: inherit;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px clamp(18px, 4vw, 56px);
  background: rgba(247, 243, 235, .86);
  border-bottom: 1px solid rgba(22, 22, 22, .09);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font: 800 16px "Manrope", sans-serif;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  color: white;
  background: var(--ink);
  border-radius: 50%;
  font-size: 12px;
  letter-spacing: 0;
}

.nav {
  display: flex;
  gap: 22px;
  color: var(--muted);
  font-size: 14px;
}

.nav a {
  text-decoration: none;
}

.hero {
  display: grid;
  grid-template-columns: minmax(320px, .78fr) minmax(360px, 1.22fr);
  align-items: center;
  min-height: calc(100vh - 72px);
  padding: clamp(42px, 7vw, 78px) clamp(18px, 4vw, 56px) 54px;
  gap: clamp(24px, 4vw, 56px);
  border-bottom: 1px solid var(--line);
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--red);
  font: 800 12px "Manrope", sans-serif;
  letter-spacing: .08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 850px;
  margin-bottom: 22px;
  font-size: clamp(44px, 6vw, 88px);
  line-height: .98;
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.05;
}

h3 {
  margin-bottom: 10px;
  font-size: 22px;
}

.lead,
.section p,
.feature p,
.product p,
.checklist span {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.8;
}

.lead {
  max-width: 680px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border: 1px solid var(--ink);
  border-radius: 999px;
  font-weight: 700;
  text-decoration: none;
}

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

.button.secondary {
  background: rgba(255, 255, 255, .42);
}

.hero-media {
  overflow: hidden;
  border: 1px solid rgba(22, 22, 22, .12);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
}

.hero-media img {
  display: block;
  width: 100%;
  height: auto;
}

.section {
  padding: clamp(54px, 8vw, 104px) clamp(18px, 5vw, 76px);
}

.story {
  display: grid;
  grid-template-columns: minmax(250px, .8fr) minmax(0, 1.2fr);
  gap: 40px;
  border-bottom: 1px solid var(--line);
}

.angle {
  display: grid;
  grid-template-columns: minmax(260px, .78fr) minmax(0, 1.22fr);
  gap: 38px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.angle-copy {
  display: grid;
  gap: 18px;
}

.angle-copy p {
  margin-bottom: 0;
}

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

.feature,
.product,
.checklist div {
  background: rgba(255, 250, 241, .74);
  border: 1px solid rgba(22, 22, 22, .1);
  border-radius: 8px;
}

.feature {
  padding: 26px;
}

.feature span {
  color: var(--blue);
  font: 800 13px "Manrope", sans-serif;
}

.feature.accent {
  border-color: rgba(209, 59, 53, .38);
  background: rgba(255, 244, 238, .86);
}

.specs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  padding-top: 0;
  background: var(--line);
}

.spec-card {
  display: grid;
  gap: 8px;
  padding: 28px;
  background: var(--paper);
}

.spec-card strong {
  font: 800 clamp(26px, 3vw, 42px) "Manrope", sans-serif;
}

.spec-card span {
  color: var(--muted);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 28px;
}

.notice {
  margin-top: 16px;
  padding: 14px 16px;
  color: #3c3427;
  background: rgba(201, 155, 69, .16);
  border: 1px solid rgba(201, 155, 69, .34);
  border-radius: 8px;
  font-weight: 600;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.product {
  display: flex;
  min-height: 100%;
  flex-direction: column;
  overflow: hidden;
  padding: 0;
}

.product-visual {
  position: relative;
  display: block;
  aspect-ratio: 4 / 3;
  margin-bottom: 18px;
  background:
    linear-gradient(135deg, rgba(209, 59, 53, .08), rgba(36, 107, 143, .1)),
    #fff;
  border-bottom: 1px solid rgba(22, 22, 22, .08);
}

.product-visual img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.product h3 {
  padding: 0 18px;
  font-size: 22px;
}

.product p {
  padding: 0 18px;
}

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: auto 18px 16px;
  padding-top: 12px;
}

.meta span {
  padding: 5px 10px;
  color: #28231a;
  background: rgba(201, 155, 69, .18);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
}

.buy {
  width: calc(100% - 36px);
  margin: 0 18px 10px;
}

.seller-note {
  display: block;
  margin: 0 18px 18px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}

.guide {
  display: grid;
  grid-template-columns: minmax(270px, .82fr) minmax(0, 1.18fr);
  gap: 32px;
  background: #151515;
  color: white;
}

.guide-copy p {
  color: rgba(255, 255, 255, .7);
}

.checklist {
  display: grid;
  gap: 12px;
}

.checklist div {
  display: grid;
  gap: 4px;
  padding: 20px;
  color: var(--ink);
  background: rgba(255, 255, 255, .92);
}

.checklist strong {
  font-size: 18px;
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 28px clamp(18px, 5vw, 76px);
  color: rgba(255, 255, 255, .72);
  background: #0e0e0e;
}

.footer p {
  margin: 0;
}

.footer a {
  color: white;
  white-space: nowrap;
}

@media (max-width: 900px) {
  .hero,
  .story,
  .angle,
  .guide {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: 0;
  }

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

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

  .nav {
    width: 100%;
    justify-content: space-between;
    gap: 10px;
  }

  h1 {
    font-size: 42px;
  }

  .modes,
  .specs,
  .product-grid {
    grid-template-columns: 1fr;
  }

  .footer {
    flex-direction: column;
  }
}