:root {
  --ink: #1d2430;
  --muted: #5e6a78;
  --paper: #ffffff;
  --canvas: #f5f7f8;
  --line: #d5dde5;
  --accent: #146c63;
  --accent-dark: #0c4f49;
  --soft: #eef2f5;
}

* {
  box-sizing: border-box;
}

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

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4.25rem;
  padding: 0 2rem;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
}

.brand,
nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.brand {
  font-weight: 850;
  text-decoration: none;
}

.brand-copy {
  display: grid;
  gap: 0.1rem;
  line-height: 1;
}

.brand-subtitle {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 0.5rem;
  color: #ffffff;
  background: var(--accent);
}

nav a {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 750;
  text-decoration: none;
}

nav a:hover {
  color: var(--accent-dark);
}

.hero {
  position: relative;
  display: grid;
  min-height: min(46rem, calc(100vh - 4.25rem));
  overflow: hidden;
}

.hero img,
.hero-overlay,
.hero-content {
  grid-area: 1 / 1;
}

.hero img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  background: linear-gradient(90deg, rgba(8, 31, 29, 0.92), rgba(8, 31, 29, 0.62), rgba(8, 31, 29, 0.1));
}

.hero-content {
  align-self: center;
  width: min(42rem, calc(100% - 2rem));
  margin-left: clamp(1rem, 7vw, 7rem);
  color: #ffffff;
}

.eyebrow {
  margin: 0 0 0.5rem;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 850;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #8ee0d5;
}

.hero h1 {
  max-width: 48rem;
  margin: 0;
  font-size: clamp(3rem, 6vw, 5.7rem);
  line-height: 0.95;
}

.hero p {
  max-width: 34rem;
  margin: 1.25rem 0 0;
  color: rgba(255, 255, 255, 0.9);
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  line-height: 1.45;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

.primary-link,
.secondary-link,
.download-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.8rem;
  border-radius: 0.5rem;
  padding: 0 1.1rem;
  font-weight: 850;
  text-decoration: none;
}

.primary-link {
  color: var(--accent-dark);
  background: #ffffff;
}

.secondary-link {
  border: 1px solid rgba(255, 255, 255, 0.55);
  color: #ffffff;
  background: rgba(255, 255, 255, 0.12);
}

.section {
  width: min(70rem, calc(100% - 2rem));
  margin: 0 auto;
  padding: 4rem 0;
}

.section-heading {
  margin-bottom: 1.25rem;
}

.section h2 {
  margin: 0;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  line-height: 1.1;
}

.value-grid,
.download-grid,
.install-grid,
.verify-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.value-grid article,
.download-card,
.notice-card,
.install-grid article,
.verify-grid > div {
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  padding: 1.25rem;
  background: var(--paper);
}

.value-grid article {
  background: linear-gradient(180deg, #ffffff, #f8fbfb);
}

h3 {
  margin: 0;
  font-size: 1.1rem;
}

.value-grid p,
.download-card p,
.notice-card p,
.install-grid p,
.verify-grid p {
  margin: 0.75rem 0 0;
  color: var(--muted);
  line-height: 1.5;
}

.notice-card {
  margin-top: 1rem;
  border-color: rgba(20, 108, 99, 0.26);
  background: #f8fbfb;
}

.notice-card code {
  display: block;
  margin-top: 1rem;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  padding: 0.85rem;
  color: var(--ink);
  background: #ffffff;
  font: 0.9rem ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

.comparison-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1rem;
}

.comparison-strip span {
  border: 1px solid var(--line);
  border-radius: 999rem;
  padding: 0.55rem 0.8rem;
  color: var(--accent-dark);
  background: var(--soft);
  font-size: 0.88rem;
  font-weight: 800;
}

.download-button {
  width: 100%;
  margin-top: 1.25rem;
  color: #ffffff;
  background: var(--accent);
}

.download-button--secondary {
  color: var(--accent-dark);
  background: var(--soft);
}

.download-button--disabled {
  color: var(--muted);
  background: var(--soft);
}

.step-number {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  margin-bottom: 1rem;
  border-radius: 999rem;
  color: #ffffff;
  background: var(--accent);
  font-weight: 850;
}

.verify-grid a {
  display: inline-block;
  margin-top: 1rem;
  color: var(--accent-dark);
  font-weight: 800;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.5rem 2rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  background: var(--paper);
  font-size: 0.9rem;
}

@media (max-width: 48rem) {
  .site-header,
  footer {
    align-items: flex-start;
    flex-direction: column;
  }

  nav {
    flex-wrap: wrap;
  }

  .hero {
    min-height: 40rem;
  }

  .hero-overlay {
    background: rgba(8, 31, 29, 0.76);
  }

  .value-grid,
  .download-grid,
  .install-grid,
  .verify-grid {
    grid-template-columns: 1fr;
  }
}