:root {
  color-scheme: light;
  --ink: #16252c;
  --muted: #5b6970;
  --line: #dbe2e5;
  --paper: #f7f5ef;
  --white: #ffffff;
  --blue: #153246;
  --green: #2e7a66;
  --green-dark: #1f5b4b;
  --amber: #c7903e;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--ink);
  background: var(--paper);
}

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

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(18px, 4vw, 52px);
  background: rgba(247, 245, 239, 0.93);
  border-bottom: 1px solid rgba(22, 37, 44, 0.12);
  backdrop-filter: blur(14px);
}

.brand {
  font-weight: 800;
  text-decoration: none;
  color: var(--blue);
}

nav {
  display: flex;
  gap: clamp(12px, 3vw, 28px);
  color: var(--muted);
  font-size: 0.95rem;
}

nav a {
  text-decoration: none;
}

.hero {
  min-height: calc(100svh - 68px);
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(260px, 0.75fr);
  align-items: center;
  gap: clamp(28px, 6vw, 88px);
  padding: clamp(36px, 7vw, 88px) clamp(18px, 5vw, 72px);
}

.hero h1,
.resource-hero h1 {
  margin: 0;
  max-width: 10ch;
  color: var(--blue);
  font-size: clamp(3rem, 8vw, 6.8rem);
  line-height: 0.93;
  letter-spacing: 0;
}

.subtitle {
  margin: 20px 0 0;
  color: var(--green-dark);
  font-size: clamp(1.25rem, 2.6vw, 2.05rem);
  line-height: 1.16;
  font-weight: 700;
}

.lede {
  max-width: 740px;
  margin: 24px 0 0;
  color: #314049;
  font-size: clamp(1.02rem, 1.6vw, 1.24rem);
  line-height: 1.55;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--amber);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 18px;
  border: 1px solid var(--blue);
  border-radius: 6px;
  font-weight: 800;
  text-decoration: none;
  line-height: 1.1;
}

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

.button.secondary {
  background: transparent;
  color: var(--blue);
}

.button.full {
  width: 100%;
}

.book-stage {
  justify-self: center;
  width: min(390px, 78vw);
}

.book-stage img {
  border-radius: 4px;
  box-shadow: 0 28px 80px rgba(19, 34, 43, 0.28), 10px 10px 0 rgba(46, 122, 102, 0.18);
}

.band {
  padding: clamp(46px, 8vw, 92px) clamp(18px, 5vw, 72px);
}

.band.dark {
  color: var(--white);
  background: var(--blue);
}

.section-copy {
  max-width: 820px;
}

.section-copy h2,
.split h2,
.download-item h2 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.8rem);
  line-height: 1.04;
  letter-spacing: 0;
}

.section-copy p:not(.eyebrow),
.split p,
.download-item p {
  color: inherit;
  opacity: 0.84;
  font-size: 1.05rem;
  line-height: 1.55;
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: 46px;
  background: rgba(255, 255, 255, 0.22);
}

.tool-grid article {
  min-height: 190px;
  padding: clamp(22px, 3vw, 32px);
  background: var(--blue);
}

.tool-grid h3 {
  margin: 0 0 12px;
  font-size: 1.25rem;
}

.visual-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  background: var(--ink);
}

.visual-strip img {
  width: 100%;
  height: 26vw;
  min-height: 220px;
  max-height: 360px;
  object-fit: cover;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 360px);
  gap: clamp(28px, 6vw, 76px);
  padding: clamp(48px, 8vw, 96px) clamp(18px, 5vw, 72px);
  align-items: start;
}

.launch-panel {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.launch-panel h3 {
  margin: 0 0 10px;
}

.resource-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 220px;
  gap: clamp(28px, 6vw, 72px);
  align-items: center;
  padding: clamp(44px, 7vw, 86px) clamp(18px, 5vw, 72px);
}

.resource-hero .qr {
  width: 220px;
  border: 10px solid var(--white);
  box-shadow: 0 18px 44px rgba(19, 34, 43, 0.16);
}

.download-list {
  display: grid;
  gap: 1px;
  padding: 1px clamp(18px, 5vw, 72px) clamp(48px, 8vw, 92px);
}

.download-item {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: clamp(22px, 5vw, 48px);
  align-items: center;
  padding: clamp(24px, 5vw, 48px);
  background: var(--white);
}

.download-item img {
  width: 180px;
  border: 1px solid var(--line);
  border-radius: 4px;
}

.download-item h2 {
  font-size: clamp(1.6rem, 3vw, 2.6rem);
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 24px clamp(18px, 5vw, 72px);
  color: var(--paper);
  background: var(--ink);
}

footer p {
  margin: 0;
}

@media (max-width: 820px) {
  .site-header,
  footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero,
  .split,
  .resource-hero,
  .download-item {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero h1,
  .resource-hero h1 {
    max-width: 11ch;
  }

  .book-stage {
    justify-self: start;
    width: min(320px, 80vw);
  }

  .tool-grid,
  .visual-strip {
    grid-template-columns: 1fr;
  }

  .visual-strip img {
    height: 280px;
  }

  .resource-hero .qr {
    width: 180px;
  }
}