:root {
  --ink: #151716;
  --muted: #5b6460;
  --line: #d8ded9;
  --paper: #f6f7f2;
  --white: #ffffff;
  --green: #1f6b4d;
  --green-dark: #103f31;
  --gold: #d69c35;
  --red: #b74435;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 0 clamp(18px, 5vw, 64px);
  border-bottom: 1px solid rgba(21, 23, 22, 0.1);
  background: rgba(246, 247, 242, 0.88);
  backdrop-filter: blur(18px);
}

.brand,
nav {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0;
}

.brand-mark {
  width: 18px;
  height: 18px;
  border: 4px solid var(--green);
  transform: rotate(45deg);
}

nav {
  gap: clamp(12px, 3vw, 30px);
  color: var(--muted);
  font-size: 0.94rem;
  font-weight: 700;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 1.1fr);
  gap: clamp(28px, 5vw, 70px);
  align-items: center;
  min-height: calc(100svh - 72px);
  padding: clamp(34px, 6vw, 80px) clamp(18px, 5vw, 64px) 36px;
}

.hero-copy {
  max-width: 660px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--green);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 18px;
  font-size: clamp(3.1rem, 8vw, 8.8rem);
  line-height: 0.88;
  letter-spacing: 0;
  text-transform: uppercase;
}

h2 {
  margin-bottom: 14px;
  font-size: clamp(1.75rem, 4vw, 3.8rem);
  line-height: 0.96;
  letter-spacing: 0;
  text-transform: uppercase;
}

.lede {
  max-width: 540px;
  color: var(--muted);
  font-size: clamp(1rem, 1.8vw, 1.24rem);
  line-height: 1.55;
}

.price {
  margin: 0 0 18px;
  color: var(--green-dark);
  font-size: clamp(2rem, 4vw, 3.4rem);
  font-weight: 900;
  line-height: 1;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border: 1px solid var(--ink);
  border-radius: 6px;
  font-weight: 850;
}

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

.button.ghost {
  border-color: var(--green);
  color: var(--green-dark);
  background: rgba(31, 107, 77, 0.08);
}

.button.dark {
  color: var(--white);
  background: var(--green-dark);
  border-color: var(--green-dark);
}

.product-stage {
  position: relative;
  min-height: min(620px, 70svh);
  overflow: hidden;
  border-radius: 24px;
  background:
    linear-gradient(120deg, rgba(255, 255, 255, 0.75), rgba(214, 156, 53, 0.2)),
    #dfe5dd;
  box-shadow: 0 28px 70px rgba(21, 23, 22, 0.16);
}

.product-stage::before {
  content: "";
  position: absolute;
  inset: auto 7% 11% 7%;
  height: 18%;
  background: rgba(21, 23, 22, 0.14);
  filter: blur(24px);
}

.product-stage img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border-radius: inherit;
  object-fit: cover;
  object-position: center;
}

.speed-plate {
  position: absolute;
  right: clamp(14px, 4vw, 34px);
  bottom: clamp(14px, 4vw, 34px);
  display: grid;
  grid-template-columns: auto auto;
  align-items: end;
  min-width: min(260px, calc(100% - 28px));
  padding: 20px;
  border-radius: 8px;
  color: var(--white);
  background: var(--red);
  box-shadow: 0 18px 36px rgba(183, 68, 53, 0.3);
}

.speed-plate span {
  grid-column: 1 / -1;
  font-size: 0.75rem;
  font-weight: 900;
  text-transform: uppercase;
}

.speed-plate strong {
  font-size: clamp(4rem, 10vw, 7rem);
  line-height: 0.78;
}

.speed-plate em {
  padding: 0 0 8px 8px;
  font-size: 1.4rem;
  font-style: normal;
  font-weight: 900;
  text-transform: uppercase;
}

.build-band,
.specs,
.cta-band {
  padding: clamp(38px, 7vw, 86px) clamp(18px, 5vw, 64px);
}

.build-band {
  background: var(--white);
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 28px;
}

.section-heading h2 {
  margin-bottom: 0;
}

.option-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.option {
  min-height: 150px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcf8;
}

.option.active {
  border-color: rgba(31, 107, 77, 0.34);
  box-shadow: inset 0 0 0 2px rgba(31, 107, 77, 0.16);
}

.price-option {
  background: rgba(214, 156, 53, 0.12);
}

.option-label,
.spec-list span {
  display: block;
  margin-bottom: 18px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

.option strong {
  font-size: clamp(1.5rem, 2.2vw, 2.2rem);
  line-height: 1;
}

.specs {
  display: grid;
  grid-template-columns: minmax(0, 0.75fr) minmax(320px, 1fr);
  gap: clamp(28px, 5vw, 70px);
  align-items: start;
}

.spec-panel p {
  max-width: 560px;
  color: var(--muted);
  line-height: 1.65;
}

.spec-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
  background: var(--white);
}

.spec-list div {
  min-height: 134px;
  padding: 20px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.spec-list strong {
  font-size: clamp(1.22rem, 2vw, 1.8rem);
}

.cta-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  color: var(--white);
  background: var(--ink);
}

.cta-band .eyebrow {
  color: var(--gold);
}

.cta-band h2 {
  margin-bottom: 0;
}

@media (max-width: 820px) {
  .site-header {
    min-height: 64px;
    padding-top: 0;
    padding-bottom: 0;
  }

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

  .hero {
    min-height: auto;
    padding-top: 24px;
  }

  .product-stage {
    order: -1;
    min-height: 360px;
  }

  .option-grid,
  .spec-list {
    grid-template-columns: 1fr;
  }

  .section-heading,
  .cta-band {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 520px) {
  .site-header {
    gap: 12px;
  }

  nav {
    gap: 14px;
    font-size: 0.86rem;
  }

  h1 {
    font-size: 2.86rem;
    line-height: 0.92;
  }

  .button {
    width: 100%;
  }

  .product-stage {
    min-height: 320px;
  }

  .speed-plate {
    min-width: 190px;
    padding: 16px;
  }

  .speed-plate strong {
    font-size: 4.2rem;
  }
}