/* AWSBlogHub AI landing page. Static, no build step.
   Design system: solid markers = exists today, dashed markers = planned. */

:root {
  --navy: #232F3E;
  --navy-deep: #18212D;
  --navy-line: #3A4A5E;
  --orange: #FF9900;
  --orange-hover: #FFAD33;
  --orange-ink: #A64F00;   /* orange dark enough for text on white */
  --white: #FFFFFF;
  --gray-50: #F4F5F7;
  --gray-200: #D9DEE4;
  --gray-600: #5A6675;
  --on-navy-muted: #B9C3CF;

  --font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

*, *::before, *::after { box-sizing: border-box; }

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--navy);
  background: var(--white);
}

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

a {
  color: inherit;
  text-decoration-color: var(--orange-ink);
  text-decoration-thickness: 2px;
  text-underline-offset: 0.2em;
}
a:hover { text-decoration-color: var(--navy); }
.on-dark a { text-decoration-color: var(--orange); }
.on-dark a:hover { text-decoration-color: var(--white); }

:focus-visible {
  outline: 3px solid var(--orange-ink);
  outline-offset: 3px;
}
.on-dark :focus-visible,
.site-header :focus-visible { outline-color: var(--orange); }

.container {
  width: min(1120px, 100% - 2.5rem);
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  left: 0.75rem;
  top: -4rem;
  z-index: 10;
  padding: 0.6rem 1rem;
  background: var(--orange);
  color: var(--navy);
  font-weight: 700;
  border-radius: 6px;
}
.skip-link:focus { top: 0.75rem; }

/* Header */
.site-header {
  background: var(--navy);
  color: var(--white);
  border-bottom: 1px solid var(--navy-line);
}
.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  padding-block: 0.9rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 800;
  font-size: 1.125rem;
  letter-spacing: -0.01em;
  text-decoration: none;
}
.brand:hover { text-decoration: none; }
.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem 1.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.nav-list a {
  display: inline-block;
  padding: 0.65rem 0;
  text-decoration: none;
  color: var(--on-navy-muted);
  font-weight: 600;
}
.nav-list a:hover { color: var(--white); }
.nav-list .nav-github {
  padding: 0.55rem 0.9rem;
  border: 1.5px solid var(--navy-line);
  border-radius: 6px;
  color: var(--white);
}
.nav-list .nav-github:hover { border-color: var(--orange); }

/* Hero */
.hero {
  background: var(--navy);
  color: var(--white);
  padding-block: clamp(3rem, 8vw, 6rem);
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2.5rem;
  align-items: center;
}
.hero h1 {
  max-width: 18ch;
  margin-bottom: 1.25rem;
  font-size: clamp(2.1rem, 5.2vw, 3.6rem);
  line-height: 1.08;
  font-weight: 800;
  letter-spacing: -0.03em;
}
.lead {
  max-width: 58ch;
  margin-bottom: 2rem;
  font-size: 1.125rem;
  color: var(--on-navy-muted);
}

.actions { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.7rem 1.25rem;
  border: 2px solid transparent;
  border-radius: 6px;
  font-weight: 700;
  text-decoration: none;
}
.btn-primary { background: var(--orange); color: var(--navy); }
.btn-primary:hover { background: var(--orange-hover); }
.btn-secondary { border-color: #6B7C93; color: var(--white); }
.btn-secondary:hover { border-color: var(--white); }
.btn-dark { background: var(--navy); color: var(--white); }
.btn-dark:hover { background: var(--navy-deep); }
.btn-outline { border-color: var(--navy); color: var(--navy); }
.btn-outline:hover { background: var(--white); }

/* Status ledger in the hero */
.ledger {
  padding: 1.5rem;
  background: var(--navy-deep);
  border: 1px solid var(--navy-line);
  border-radius: 10px;
}
.ledger h2 { margin-bottom: 0.5rem; font-size: 1.125rem; font-weight: 700; }
.ledger ul { margin: 0; padding: 0; list-style: none; }
.ledger li {
  display: grid;
  grid-template-columns: 6.25rem 1fr;
  gap: 0.75rem;
  align-items: start;
  padding: 0.8rem 0;
  border-top: 1px solid var(--navy-line);
}
.ledger-note {
  margin: 0.75rem 0 0;
  font-size: 0.9375rem;
  color: var(--on-navy-muted);
}
.ledger .tag-planned { color: var(--on-navy-muted); }

/* Tags: solid = available, dashed = planned */
.tag {
  display: inline-block;
  justify-self: start;
  min-width: 5.75rem;
  padding: 0.1rem 0.6rem;
  border: 2px solid var(--orange);
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 700;
  line-height: 1.5;
  text-align: center;
}
.tag-built { background: var(--orange); color: var(--navy); }
.tag-planned { border: 2px dashed currentColor; color: var(--gray-600); background: transparent; }

/* Sections */
.section { padding-block: clamp(3rem, 7vw, 5.5rem); }
.band { background: var(--gray-50); }
.section h2 {
  margin-bottom: 0.75rem;
  font-size: clamp(1.6rem, 3.4vw, 2.3rem);
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.section-intro { max-width: 62ch; color: var(--gray-600); font-size: 1.0625rem; }

/* Feature rows */
.rows {
  margin: 2.25rem 0 0;
  padding: 0;
  list-style: none;
  border-bottom: 1px solid var(--gray-200);
}
.rows li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.5rem 2rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--gray-200);
}
.rows h3 { margin: 0; font-size: 1.125rem; font-weight: 700; line-height: 1.3; }
.rows p { margin: 0; color: var(--gray-600); max-width: 60ch; }

.subhead { margin: 3rem 0 1.25rem; font-size: 1.25rem; font-weight: 700; }
.usecases {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.25rem 3rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.usecases li { padding-left: 1rem; border-left: 4px solid var(--orange); max-width: 52ch; }
.usecases strong { display: block; }

/* Status panels */
.status-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: 1.5rem; margin-top: 2.25rem; }
.panel { padding: 1.5rem; background: var(--white); border-radius: 10px; }
.panel-built { border: 2px solid var(--navy); }
.panel-planned { border: 2px dashed var(--gray-600); }
.panel h3 { margin-bottom: 0.75rem; font-size: 1.25rem; font-weight: 700; }
.panel ul { margin: 0; padding-left: 1.25rem; }
.panel li + li { margin-top: 0.5rem; }

/* Roadmap */
.phases {
  display: grid;
  gap: 2rem;
  margin: 2.5rem 0 0;
  padding: 0;
  list-style: none;
}
.phase {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.75rem 2.5rem;
  padding-left: 1.25rem;
  border-left: 4px dashed var(--gray-200);
}
.phase-now { border-left: 4px solid var(--orange); }
.phase h3 { margin-bottom: 0; font-size: 1.5rem; font-weight: 800; letter-spacing: -0.01em; }
.phase-title { margin: 0; color: var(--gray-600); font-weight: 600; }
.phase ul { margin: 0; padding-left: 1.25rem; max-width: 60ch; }
.phase li + li { margin-top: 0.4rem; }

/* Contribute */
.contribute-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: 2.5rem; }
.plain-list { margin: 0 0 1.75rem; padding-left: 1.25rem; max-width: 56ch; }
.plain-list li + li { margin-top: 0.4rem; }
.preview h3 { margin-bottom: 0.5rem; font-size: 1.25rem; font-weight: 700; }
.preview p { color: var(--gray-600); }
pre {
  margin: 1rem 0;
  padding: 1rem 1.25rem;
  overflow-x: auto;
  background: var(--navy);
  color: #E8EDF3;
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1.7;
}
code { font-family: var(--font-mono); font-size: 0.92em; }
p code { padding: 0.1rem 0.35rem; background: var(--white); border: 1px solid var(--gray-200); border-radius: 4px; }

/* Footer */
.site-footer {
  background: var(--navy-deep);
  color: var(--on-navy-muted);
  padding-block: 2.5rem;
}
.footer-inner p { margin-bottom: 1rem; }
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  margin: 0 0 1.5rem;
  padding: 0;
  list-style: none;
}
.footer-links a, .footer-inner a { color: var(--white); }
.disclaimer { max-width: 70ch; margin: 0; font-size: 0.875rem; }

/* Wider screens */
@media (min-width: 800px) {
  .rows li { grid-template-columns: minmax(0, 1fr) minmax(0, 1.7fr) auto; align-items: start; }
  .usecases { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .status-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .phase { grid-template-columns: 14rem minmax(0, 1fr); }
}

@media (min-width: 920px) {
  .hero-grid { grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.9fr); gap: 4rem; }
  .contribute-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 4rem; }
}

@media (max-width: 420px) {
  .ledger li { grid-template-columns: 1fr; gap: 0.35rem; }
  .btn { width: 100%; }
}