@font-face {
  font-family: "Source Han Serif Local";
  src: url("./fonts/source-han-serif/SOURCEHANSERIFCN-REGULAR.OTF")
    format("opentype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Source Han Serif Local";
  src: url("./fonts/source-han-serif/SOURCEHANSERIFCN-SEMIBOLD.OTF")
    format("opentype");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Source Han Serif Local";
  src: url("./fonts/source-han-serif/SOURCEHANSERIFCN-BOLD.OTF")
    format("opentype");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Source Serif 4 Local";
  src: url("./fonts/source-serif-4/SourceSerif4-Regular.ttf")
    format("truetype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Source Serif 4 Local";
  src: url("./fonts/source-serif-4/SourceSerif4-Medium.ttf")
    format("truetype");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Source Serif 4 Local";
  src: url("./fonts/source-serif-4/SourceSerif4-SemiBold.ttf")
    format("truetype");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "JetBrains Mono Local";
  src: url("./fonts/jetbrains-mono/JETBRAINSMONO-REGULAR.TTF")
    format("truetype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "JetBrains Mono Local";
  src: url("./fonts/jetbrains-mono/JETBRAINSMONO-MEDIUM.TTF")
    format("truetype");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "JetBrains Mono Local";
  src: url("./fonts/jetbrains-mono/JETBRAINSMONO-SEMIBOLD.TTF")
    format("truetype");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "JetBrains Mono Local";
  src: url("./fonts/jetbrains-mono/JETBRAINSMONO-BOLD.TTF")
    format("truetype");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

:root {
  --paper: #f7f8f5;
  --paper-deep: #eef1ec;
  --ink: #1a1d21;
  --muted: #59616b;
  --border: rgba(26, 29, 33, 0.14);
  --accent: #2e607d;
  --accent-soft: rgba(46, 96, 125, 0.09);
  --shadow: 0 18px 42px rgba(23, 31, 38, 0.06);
  --font-body: "Source Serif 4 Local", "Source Han Serif Local",
    "Source Han Serif SC", "Noto Serif SC", "Iowan Old Style",
    "Palatino Linotype", "Book Antiqua", serif;
  --font-display: "Avenir Next Condensed", "Franklin Gothic Medium",
    "Helvetica Neue", sans-serif;
  --font-mono: "JetBrains Mono Local", "SFMono-Regular", "JetBrains Mono",
    "Menlo", monospace;
  --content-width: min(70rem, calc(100vw - 2.4rem));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-body);
  background: var(--paper);
  line-height: 1.72;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  background-image: linear-gradient(
    rgba(26, 29, 33, 0.024) 1px,
    transparent 1px
  );
  background-size: 100% 2.1rem;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.25), transparent 92%);
}

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

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

.page-shell {
  width: var(--content-width);
  margin: 0 auto;
  padding-bottom: 5rem;
}

.site-header {
  padding: 1.25rem 0 0.75rem;
}

.site-header__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
  padding: 0.7rem 0 1rem;
  border-bottom: 1px solid var(--border);
}

.site-brand {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 0.95rem;
}

.home-layout {
  padding-top: 2.5rem;
}

.hero {
  max-width: 48rem;
  padding: 0.4rem 0 2.5rem;
  animation: rise-in 0.7s ease-out both;
}

.hero__eyebrow,
.section-heading p,
.post-article__kicker {
  margin: 0 0 0.55rem;
  color: var(--accent);
  font-family: var(--font-display);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero h1,
.featured-post h2,
.post-card h3,
.post-article h1,
.post-article h2,
.section-heading h2 {
  margin: 0;
  line-height: 1.1;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.hero h1 {
  max-width: 12ch;
  font-size: clamp(2.35rem, 5.4vw, 4.1rem);
}

.hero__lede {
  max-width: 44rem;
  margin: 1.4rem 0 0;
  color: var(--muted);
  font-size: 1.06rem;
}

.featured-post {
  margin: 0 0 3rem;
  padding: 1.35rem 1.55rem 1.65rem;
  border: 1px solid rgba(46, 96, 125, 0.18);
  background: var(--accent-soft);
  box-shadow: var(--shadow);
  animation: rise-in 0.82s ease-out both;
}

.featured-post__meta,
.post-card__meta {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
  color: var(--muted);
  font-family: var(--font-display);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.featured-post h2 {
  margin-top: 0.85rem;
  font-size: clamp(1.65rem, 3.1vw, 2.35rem);
}

.featured-post p {
  max-width: 44rem;
  margin-bottom: 0;
  font-size: 1rem;
}

.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(18rem, 0.9fr);
  gap: 2.4rem;
}

.section-heading {
  margin-bottom: 1.4rem;
}

.section-heading h2 {
  font-size: 1.65rem;
}

.post-list,
.sidebar-panel,
.post-article,
.post-footer-nav {
  animation: rise-in 0.9s ease-out both;
}

.post-card {
  padding: 0 0 1.5rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.post-card h3 {
  margin-top: 0.75rem;
  font-size: 1.4rem;
}

.post-card p {
  margin-bottom: 0;
  color: var(--muted);
}

.sidebar {
  display: grid;
  gap: 1.4rem;
  align-content: start;
}

.sidebar-panel {
  padding: 1.25rem 1.15rem;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.56);
}

.note-list,
.archive-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.note-list li,
.archive-list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.8rem;
  padding: 0.75rem 0;
  border-top: 1px solid var(--border);
}

.note-list li:first-child,
.archive-list li:first-child {
  border-top: 0;
  padding-top: 0;
}

.note-list span,
.archive-list span {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.86rem;
}

.about-panel p {
  margin: 0;
  color: var(--muted);
}

.archive-list li {
  grid-template-columns: 1fr auto;
  align-items: center;
}

.post-layout {
  max-width: 52rem;
  margin: 0 auto;
  padding-top: 2rem;
}

.post-article__header {
  padding: 2rem 0 2.2rem;
  border-bottom: 1px solid var(--border);
}

.post-article h1 {
  max-width: 12ch;
  font-size: clamp(2.2rem, 4.8vw, 3.5rem);
}

.post-article__lede {
  margin: 1.5rem 0 0;
  max-width: 38rem;
  color: var(--muted);
  font-size: 1.05rem;
}

.post-article__body {
  padding-top: 2rem;
  font-size: 1rem;
}

.post-article__body h2 {
  margin: 2.6rem 0 0.8rem;
  font-size: 1.7rem;
}

.post-article__body blockquote {
  margin: 2rem 0;
  padding: 1rem 1.2rem;
  border-left: 3px solid var(--accent);
  background: rgba(255, 255, 255, 0.62);
  color: var(--muted);
  font-size: 1.04rem;
}

.post-footer-nav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 2.6rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(14px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 860px) {
  .content-grid {
    grid-template-columns: 1fr;
  }

  .hero h1,
  .post-article h1 {
    max-width: none;
  }

  .post-footer-nav {
    flex-direction: column;
  }
}

@media (max-width: 640px) {
  .page-shell {
    width: min(100vw - 1.4rem, 100%);
  }

  .site-header__inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero {
    padding-top: 0.2rem;
  }

  .hero__lede,
  .featured-post p,
  .post-article__lede,
  .post-article__body {
    font-size: 1rem;
  }

  .featured-post,
  .sidebar-panel {
    padding: 1rem;
  }
}