:root {
  color-scheme: light;
  --bg: #f8f5ff;
  --surface: #ffffff;
  --text: #20172e;
  --muted: #62576f;
  --line: #dfd5f2;
  --accent: #9b5de5;
  --accent-dark: #6f2dbd;
  --accent-soft: #efe6ff;
  --warm: #7c3aed;
}

* {
  box-sizing: border-box;
}

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

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

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 22px 0;
}

.brand {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--muted);
  font-size: 14px;
}

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

main {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 72px;
}

.intro {
  min-height: 360px;
  display: flex;
  align-items: center;
  border-block: 1px solid var(--line);
  background:
    linear-gradient(90deg, rgba(248, 245, 255, 0.96), rgba(248, 245, 255, 0.72)),
    url("assets/eva-cli-architecture.svg") right center / min(640px, 64vw) auto no-repeat;
}

.intro-copy {
  max-width: 680px;
  padding: 64px 0;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--warm);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
  letter-spacing: 0;
  line-height: 1.12;
}

h1 {
  font-size: 56px;
}

h2 {
  font-size: 30px;
}

.lead {
  max-width: 620px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 18px;
}

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

.primary-action,
.secondary-action {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 8px;
  font-weight: 700;
}

.primary-action {
  background: var(--accent);
  color: #ffffff;
  box-shadow: 0 10px 24px rgba(111, 45, 189, 0.18);
}

.secondary-action {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.82);
  color: var(--accent-dark);
}

.primary-action:hover {
  background: var(--accent-dark);
}

.secondary-action:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.architecture,
.doc-grid {
  padding-top: 56px;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 20px;
}

.diagram {
  margin: 0;
  padding: 20px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 14px 34px rgba(111, 45, 189, 0.08);
}

.diagram img {
  display: block;
  width: 100%;
  min-width: 760px;
  height: auto;
}

.links-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.doc-link {
  min-height: 124px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  transition:
    border-color 160ms ease,
    box-shadow 160ms ease,
    transform 160ms ease;
}

.doc-link:hover {
  border-color: var(--accent);
  box-shadow: 0 12px 28px rgba(111, 45, 189, 0.1);
  transform: translateY(-2px);
}

.doc-link span {
  display: block;
  font-weight: 800;
}

.doc-link small {
  display: block;
  margin-top: 10px;
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 780px) {
  .site-header,
  .section-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .site-nav {
    flex-wrap: wrap;
  }

  .intro {
    min-height: 0;
    background:
      linear-gradient(180deg, rgba(248, 245, 255, 0.98), rgba(248, 245, 255, 0.9)),
      url("assets/eva-cli-architecture.svg") center bottom / 720px auto no-repeat;
  }

  .intro-copy {
    padding: 48px 0 180px;
  }

  h1 {
    font-size: 42px;
  }

  h2 {
    font-size: 26px;
  }

  .lead {
    font-size: 16px;
  }

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