/* Page scaffolding: header, footer, containers, hero, sections. */

.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

/* header */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  border-bottom: 1px solid var(--border);
  background: var(--header-bg);
  backdrop-filter: saturate(1.4) blur(14px);
  -webkit-backdrop-filter: saturate(1.4) blur(14px);
}

@media (prefers-reduced-transparency: reduce) {
  .site-header {
    background: var(--bg);
    backdrop-filter: none;
  }
}

.site-header-inner {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  min-height: 4rem;
  padding-block: var(--space-2);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  text-decoration: none;
  color: var(--text);
}

.brand:hover {
  color: var(--text);
}

/* Small rotated square: a nod to the homepage cube. */
.brand-mark {
  width: 0.7rem;
  height: 0.7rem;
  border: 2px solid var(--accent);
  border-radius: 2px;
  transform: rotate(45deg);
  transition: transform 0.4s var(--ease-out), background-color 0.2s ease;
}

.brand:hover .brand-mark {
  transform: rotate(135deg);
  background: var(--accent);
}

.site-nav {
  display: flex;
  gap: var(--space-1);
  flex-wrap: wrap;
  margin-inline-start: auto;
}

.site-nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 500;
  padding: 0.35rem 0.7rem;
  border-radius: var(--radius);
  transition: color 0.2s ease, background-color 0.2s ease;
}

.site-nav a:hover {
  color: var(--text);
  background: var(--bg-inset);
}

.site-nav a[aria-current="page"] {
  color: var(--accent);
  background: var(--accent-soft);
}

.site-controls {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* footer */
.site-footer {
  border-top: 1px solid var(--border);
  margin-top: var(--space-7);
  color: var(--text-muted);
  font-size: var(--text-sm);
}

.site-footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  padding-block: var(--space-4) var(--space-5);
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

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

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

/* hero */
.hero {
  padding-block: var(--space-6) var(--space-5);
}

.hero-kicker {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: var(--space-4);
}

.hero h1 {
  font-size: var(--text-3xl);
  font-weight: 650;
  max-width: 15ch;
  line-height: 1.02;
  letter-spacing: -0.045em;
  margin-bottom: var(--space-4);
}

.hero .lead {
  max-width: 34rem;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-top: var(--space-5);
}

@media (prefers-reduced-motion: no-preference) {
  .hero-copy > * {
    animation: hero-in 0.9s var(--ease-out) both;
  }
  .hero-copy > :nth-child(2) { animation-delay: 0.08s; }
  .hero-copy > :nth-child(3) { animation-delay: 0.16s; }
  .hero-copy > :nth-child(4) { animation-delay: 0.24s; }
}

@keyframes hero-in {
  from {
    opacity: 0;
    transform: translateY(14px);
    filter: blur(6px);
  }
  to {
    opacity: 1;
    transform: none;
    filter: none;
  }
}

/* generic sections + page headers */
.section {
  padding-block: var(--space-6);
}

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-bottom: var(--space-4);
}

.page,
.page-list {
  max-width: var(--prose);
  margin-inline: auto;
  padding: var(--space-6) var(--space-4) 0;
}

.page-header {
  margin-bottom: var(--space-5);
}

.page-header h1 {
  margin-bottom: var(--space-3);
}

.lead {
  font-size: var(--text-lg);
  line-height: 1.55;
  color: var(--text-muted);
  text-wrap: pretty;
}

.prose {
  max-width: 68ch;
}

.prose > * + * {
  margin-top: var(--space-3);
}

.prose h2 {
  margin-top: var(--space-6);
  font-size: 1.45rem;
}

.prose h3 {
  margin-top: var(--space-5);
}

.prose ul,
.prose ol {
  padding-inline-start: 1.3em;
}

.prose li + li {
  margin-top: var(--space-2);
}

.prose li::marker {
  color: var(--accent);
}

.prose strong {
  font-weight: 600;
}

.prose pre {
  margin-block: var(--space-4);
}

/* card grids */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(17rem, 1fr));
  gap: var(--space-3);
  list-style: none;
  padding: 0;
  margin-top: var(--space-4);
}

/* Scroll reveal: CSS-only, progressive (browsers without view timelines
   simply show the content). */
@media (prefers-reduced-motion: no-preference) {
  @supports (animation-timeline: view()) {
    .reveal {
      animation: reveal-up linear both;
      animation-timeline: view();
      animation-range: entry 0% entry 40%;
    }
  }
}

@keyframes reveal-up {
  from {
    opacity: 0;
    transform: translateY(1.5rem);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 48rem) {
  .container {
    padding-inline: var(--space-3);
  }

  .site-nav {
    order: 3;
    flex-basis: 100%;
    margin-inline: calc(var(--space-2) * -1) 0;
    flex-wrap: nowrap;
    overflow-x: auto;
    scrollbar-width: none;
  }

  .site-controls {
    margin-inline-start: auto;
  }

  .hero {
    padding-top: var(--space-5);
  }

  .section {
    padding-block: var(--space-5);
  }

  .page,
  .page-list {
    padding: var(--space-5) var(--space-3) 0;
  }
}

/* Page headers that double as a .section (projects, resources): the next
   section brings its own top padding. */
.page-header.section {
  padding-bottom: 0;
}