/* ASIMOV AI — Insights hub. Mobile-first; brand tokens per project CLAUDE.md. */
:root {
  --color-navy: #0f1b33;
  --color-navy-deep: #0a1226;
  --color-amber: #f5a623;
  --color-white: #ffffff;
  --color-muted: #a8b0c0;
  --color-faint: #6b7488;
  --color-line: rgba(255, 255, 255, 0.08);
  --font-heading: "Geist", system-ui, sans-serif;
  --font-body: "Hanken Grotesk", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
  --text-base: clamp(1.0625rem, 1rem + 0.3vw, 1.1875rem);
  --space-section: clamp(2.5rem, 2rem + 3vw, 5rem);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--color-navy);
  color: var(--color-white);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 18, 38, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-line);
}

.site-header .inner {
  max-width: 72rem;
  margin: 0 auto;
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  font-family: var(--font-heading);
  font-weight: 800;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-amber);
  text-decoration: none;
  font-size: 0.95rem;
}

.site-header nav {
  display: flex;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.site-header nav a {
  color: var(--color-muted);
  text-decoration: none;
}

.site-header nav a:hover,
.site-header nav a:focus-visible {
  color: var(--color-white);
}

main {
  max-width: 44rem;
  margin: 0 auto;
  padding: var(--space-section) 1.25rem;
}

.kicker {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-amber);
  margin: 0 0 1rem;
}

h1 {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 1.3rem + 2.4vw, 2.75rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0 0 1rem;
}

h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.25rem, 1.1rem + 0.9vw, 1.6rem);
  line-height: 1.25;
  margin: 2.5rem 0 0.75rem;
}

.byline {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-faint);
  letter-spacing: 0.06em;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--color-line);
  padding-bottom: 1.5rem;
}

p,
li {
  color: var(--color-muted);
}

article > p:first-of-type {
  color: var(--color-white);
  font-size: 1.1em;
}

strong {
  color: var(--color-white);
}

a {
  color: var(--color-amber);
  text-decoration-color: rgba(245, 166, 35, 0.4);
  text-underline-offset: 3px;
}

a:hover,
a:focus-visible {
  text-decoration-color: var(--color-amber);
}

blockquote {
  margin: 1.5rem 0;
  padding: 0.25rem 0 0.25rem 1.25rem;
  border-left: 3px solid var(--color-amber);
  color: var(--color-white);
}

.sources {
  margin-top: var(--space-section);
  border-top: 1px solid var(--color-line);
  padding-top: 1.5rem;
}

.sources h2 {
  margin-top: 0;
  font-size: 1rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-faint);
}

.sources ol {
  padding-left: 1.25rem;
}

.sources li {
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
  overflow-wrap: anywhere;
}

.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin: 1.5rem 0;
}

.card {
  border: 1px solid var(--color-line);
  border-radius: 6px;
  padding: 1.25rem;
  background: rgba(255, 255, 255, 0.02);
}

.card h3 {
  font-family: var(--font-heading);
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
  line-height: 1.3;
}

.card h3 a {
  color: var(--color-white);
  text-decoration: none;
}

.card h3 a:hover {
  color: var(--color-amber);
}

.card p {
  margin: 0;
  font-size: 0.9rem;
}

.card .tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-amber);
  margin-bottom: 0.6rem;
}

.card.upcoming {
  opacity: 0.65;
}

.card.upcoming .tag {
  color: var(--color-faint);
}

.cta {
  margin-top: var(--space-section);
  border: 1px solid var(--color-line);
  border-radius: 6px;
  padding: 1.5rem;
  background: rgba(245, 166, 35, 0.05);
}

.cta p {
  margin: 0 0 1rem;
}

.cta a.button {
  display: inline-block;
  background: var(--color-amber);
  color: var(--color-navy);
  font-weight: 700;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.8rem 1.4rem;
  border-radius: 4px;
  text-decoration: none;
}

.site-footer {
  border-top: 1px solid var(--color-line);
  margin-top: var(--space-section);
}

.site-footer .inner {
  max-width: 72rem;
  margin: 0 auto;
  padding: 2rem 1.25rem;
  font-size: 0.75rem;
  color: var(--color-faint);
  line-height: 1.6;
}

@media (min-width: 640px) {
  .card-grid {
    grid-template-columns: 1fr 1fr;
  }
}