:root {
  --bg: #e8edf2;
  --bg-elevated: #f4f7fa;
  --ink: #121820;
  --muted: #5a6573;
  --line: rgba(18, 24, 32, 0.12);
  --accent: #c2410c;
  --accent-soft: rgba(194, 65, 12, 0.12);
  --focus: #0e7490;
  --font-display: "Outfit", system-ui, sans-serif;
  --font-body: "Source Serif 4", Georgia, serif;
  --measure: 42rem;
  --site-width: 68rem;
  --radius: 0.35rem;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background: var(--bg);
  font-family: var(--font-body);
  font-size: 1.125rem;
  line-height: 1.7;
  font-optical-sizing: auto;
  -webkit-font-smoothing: antialiased;
}

.site-backdrop {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(ellipse 80% 50% at 10% -10%, rgba(14, 116, 144, 0.14), transparent 55%),
    radial-gradient(ellipse 60% 40% at 100% 0%, rgba(194, 65, 12, 0.1), transparent 50%),
    linear-gradient(180deg, #dfe6ee 0%, var(--bg) 38%, #eef2f6 100%);
}

.site-backdrop::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.35;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.55), transparent 70%);
}

a {
  color: var(--accent);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
  transition: color 160ms var(--ease);
}

a:hover {
  color: var(--ink);
}

a:focus-visible,
.btn:focus-visible,
.site-nav a:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(12px);
  background: rgba(232, 237, 242, 0.82);
  border-bottom: 1px solid var(--line);
}

.site-header__inner,
.site-footer__inner,
.site-main {
  width: min(100% - 2rem, var(--site-width));
  margin-inline: auto;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 3.75rem;
}

.site-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
}

.site-logo__mark {
  display: block;
  width: 1.75rem;
  height: 1.75rem;
  flex-shrink: 0;
}

.site-logo:hover {
  color: var(--accent);
}

.site-logo:hover .site-logo__mark {
  filter: invert(28%) sepia(84%) saturate(2148%) hue-rotate(4deg) brightness(92%) contrast(92%);
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.1rem;
}

.site-nav a {
  font-family: var(--font-display);
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--muted);
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--ink);
}

.site-main {
  padding: 2.5rem 0 4.5rem;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 1.5rem 0 2rem;
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
}

.site-footer__copy {
  margin: 0;
  font-family: var(--font-display);
  font-size: 0.875rem;
  color: var(--muted);
}

.site-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem 1.15rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-footer__links a {
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--muted);
  text-decoration: none;
}

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

/* Home hero — brand first */
.hero {
  max-width: 40rem;
  padding: 2.5rem 0 3.25rem;
}

.hero__mark {
  display: block;
  width: 4.5rem;
  height: 4.5rem;
  margin: 0 0 1.25rem;
}

.hero__brand {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 7vw, 4.4rem);
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: -0.045em;
  color: var(--ink);
}

.hero__title {
  margin: 0 0 1rem;
  max-width: 22ch;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3vw, 1.75rem);
  font-weight: 500;
  line-height: 1.35;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.hero__lede {
  margin: 0 0 1.75rem;
  max-width: 36ch;
  color: var(--muted);
  font-size: 1.1rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0.55rem 1.15rem;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  transition: transform 180ms var(--ease), background 180ms var(--ease), color 180ms var(--ease), border-color 180ms var(--ease);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn--primary {
  background: var(--ink);
  color: #f8fafc;
}

.btn--primary:hover {
  background: var(--accent);
  color: #fff7ed;
}

.btn--ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--ink);
}

.btn--ghost:hover {
  border-color: var(--ink);
  color: var(--ink);
}

.section-title {
  margin: 0 0 1.25rem;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--muted);
}

.posts-section {
  max-width: var(--measure);
  padding-top: 0.5rem;
  border-top: 1px solid var(--line);
}

.post-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.post-list__item + .post-list__item {
  border-top: 1px solid var(--line);
}

.post-list__link {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  align-items: baseline;
  padding: 1.1rem 0;
  color: inherit;
  text-decoration: none;
}

.post-list__title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.35;
  transition: color 160ms var(--ease);
}

.post-list__date {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--muted);
  white-space: nowrap;
}

.post-list__link:hover .post-list__title {
  color: var(--accent);
}

.home-extra {
  max-width: var(--measure);
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
}

.page-content,
.post {
  max-width: var(--measure);
}

.page-header,
.post-header {
  margin-bottom: 2rem;
}

.page-header h1,
.post-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.035em;
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--muted);
}

.post-meta__sep {
  width: 0.35rem;
  height: 0.35rem;
  border-radius: 50%;
  background: var(--muted);
  opacity: 0.55;
}

.post-nav {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}

.post-nav a {
  font-family: var(--font-display);
  font-weight: 600;
  text-decoration: none;
}

.post-nav a:hover {
  text-decoration: underline;
}

/* Prose */
.prose > *:first-child {
  margin-top: 0;
}

.prose h1,
.prose h2,
.prose h3,
.prose h4 {
  font-family: var(--font-display);
  line-height: 1.25;
  letter-spacing: -0.025em;
  color: var(--ink);
}

.prose h1 {
  font-size: clamp(1.9rem, 4vw, 2.4rem);
}

.prose h2 {
  margin-top: 2.4rem;
  font-size: 1.45rem;
}

.prose h3 {
  margin-top: 1.8rem;
  font-size: 1.2rem;
}

.prose p,
.prose ul,
.prose ol {
  margin: 0 0 1.15rem;
}

.prose li + li {
  margin-top: 0.35rem;
}

.prose code {
  padding: 0.12em 0.35em;
  border-radius: 0.25rem;
  background: var(--accent-soft);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88em;
}

.prose pre {
  overflow-x: auto;
  margin: 0 0 1.35rem;
  padding: 1rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-elevated);
}

.prose pre code {
  padding: 0;
  background: none;
  font-size: 0.86rem;
  line-height: 1.55;
}

.prose img {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
}

.prose blockquote {
  margin: 0 0 1.25rem;
  padding: 0.15rem 0 0.15rem 1rem;
  border-left: 3px solid var(--accent);
  color: var(--muted);
}

.prose hr {
  margin: 2.5rem 0;
  border: 0;
  border-top: 1px solid var(--line);
}

/* Motion */
@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(0.85rem);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.reveal {
  animation: rise-in 700ms var(--ease) both;
}

.reveal--delay {
  animation-delay: 120ms;
}

.reveal--delay-2 {
  animation-delay: 220ms;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .reveal,
  .reveal--delay,
  .reveal--delay-2,
  .btn {
    animation: none;
    transition: none;
  }

  .btn:hover {
    transform: none;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 1.05rem;
  }

  .site-main {
    padding-top: 1.75rem;
  }

  .hero {
    padding-top: 1.25rem;
    padding-bottom: 2.25rem;
  }

  .post-list__link {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }
}