:root {
  --ink: #172033;
  --ink-soft: #526071;
  --navy: #0f2742;
  --teal: #087f7a;
  --teal-dark: #056560;
  --paper: #f7f8f5;
  --surface: #ffffff;
  --line: #dce3e4;
  --line-strong: #c8d3d5;
  --code: #101827;
  --shadow: 0 18px 50px rgba(15, 39, 66, 0.08);
  --radius: 16px;
  --shell: 1160px;
  --reading: 760px;
}

* { box-sizing: border-box; }

html {
  color-scheme: light;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img, svg, video, iframe { max-width: 100%; }
img { height: auto; }

a {
  color: var(--teal-dark);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

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

:focus-visible {
  outline: 3px solid rgba(8, 127, 122, 0.32);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  left: 1rem;
  top: 1rem;
  transform: translateY(-180%);
  background: var(--navy);
  color: #fff;
  padding: 0.65rem 0.9rem;
  border-radius: 8px;
}

.skip-link:focus { transform: none; }

.site-shell {
  width: min(calc(100% - 40px), var(--shell));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  background: rgba(247, 248, 245, 0.94);
  border-bottom: 1px solid rgba(200, 211, 213, 0.9);
  backdrop-filter: blur(14px);
}

.header-inner {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  color: var(--navy);
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 11px;
  background: var(--navy);
  color: #fff;
  font-weight: 750;
  letter-spacing: -0.04em;
}

.brand-copy { line-height: 1.18; }
.brand-name { display: block; font-size: 0.98rem; font-weight: 720; }
.brand-tagline { display: block; margin-top: 0.2rem; color: var(--ink-soft); font-size: 0.72rem; letter-spacing: 0.04em; text-transform: uppercase; }

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.site-nav a {
  padding: 0.55rem 0.72rem;
  border-radius: 8px;
  color: var(--ink-soft);
  font-size: 0.92rem;
  font-weight: 650;
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  background: #e7efed;
  color: var(--navy);
}

main { min-height: calc(100vh - 184px); }

.hero {
  padding: clamp(4rem, 9vw, 7.5rem) 0 clamp(3.5rem, 7vw, 6rem);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(circle at 78% 20%, rgba(8, 127, 122, 0.1), transparent 32%),
    linear-gradient(180deg, #fbfcfa, var(--paper));
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(250px, 0.65fr);
  gap: clamp(2.5rem, 8vw, 7rem);
  align-items: end;
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--teal-dark);
  font-size: 0.78rem;
  font-weight: 760;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.hero h1,
.page-intro h1,
.post-header h1 {
  margin: 0;
  color: var(--navy);
  font-size: clamp(2.5rem, 6vw, 5.25rem);
  font-weight: 735;
  letter-spacing: -0.055em;
  line-height: 1.02;
}

.hero h1 { max-width: 820px; }

.hero-lede {
  max-width: 740px;
  margin: 1.6rem 0 0;
  color: var(--ink-soft);
  font-size: clamp(1.08rem, 2vw, 1.3rem);
  line-height: 1.55;
}

.hero-note {
  padding-left: 1.25rem;
  border-left: 2px solid var(--teal);
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.hero-note strong { display: block; margin-bottom: 0.3rem; color: var(--ink); }

.section { padding: clamp(3rem, 7vw, 5.5rem) 0; }

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.section-heading h2 {
  margin: 0;
  color: var(--navy);
  font-size: clamp(1.7rem, 4vw, 2.5rem);
  letter-spacing: -0.035em;
  line-height: 1.15;
}

.section-heading p { max-width: 560px; margin: 0.45rem 0 0; color: var(--ink-soft); }

.text-link { white-space: nowrap; font-size: 0.94rem; font-weight: 700; text-decoration: none; }
.text-link::after { content: " \2192"; }

.post-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line-strong);
}

.post-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 2rem;
  padding: 1.7rem 0;
  border-bottom: 1px solid var(--line);
}

.post-row h2 {
  margin: 0.35rem 0 0.5rem;
  font-size: clamp(1.18rem, 2.6vw, 1.55rem);
  letter-spacing: -0.025em;
  line-height: 1.25;
}

.post-row h2 a { color: var(--navy); text-decoration: none; }
.post-row h2 a:hover { color: var(--teal-dark); }
.post-row p { max-width: 780px; margin: 0; color: var(--ink-soft); font-size: 0.95rem; line-height: 1.55; }
.post-row__arrow { align-self: center; color: var(--teal); font-size: 1.35rem; text-decoration: none; }

.topic-links,
.post-topics {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.topic-link,
.post-topics a {
  display: inline-flex;
  align-items: center;
  min-height: 27px;
  padding: 0.18rem 0.55rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--ink-soft);
  background: rgba(255, 255, 255, 0.6);
  font-size: 0.73rem;
  font-weight: 680;
  line-height: 1.25;
  text-decoration: none;
}

.topic-link:hover,
.post-topics a:hover { border-color: var(--teal); color: var(--teal-dark); }

.topic-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.topic-strip .topic-link { padding: 0.48rem 0.75rem; background: var(--surface); }
.topic-count { margin-left: 0.4rem; color: #74808b; font-variant-numeric: tabular-nums; }

.page-shell,
.article-shell { padding: clamp(3.5rem, 7vw, 6rem) 0; }

.page-intro {
  max-width: 850px;
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.page-intro h1 { font-size: clamp(2.5rem, 6vw, 4.6rem); }
.page-intro .lede { max-width: 720px; margin: 1.25rem 0 0; color: var(--ink-soft); font-size: 1.12rem; }

.filter-panel {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) minmax(210px, 0.5fr) auto;
  gap: 0.8rem;
  align-items: end;
  margin-bottom: 1.25rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
}

.field label { display: block; margin: 0 0 0.35rem; color: var(--ink-soft); font-size: 0.74rem; font-weight: 720; letter-spacing: 0.06em; text-transform: uppercase; }
.field input,
.field select {
  width: 100%;
  min-height: 44px;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  font: inherit;
  font-size: 0.92rem;
}

.filter-count { padding-bottom: 0.63rem; color: var(--ink-soft); font-size: 0.9rem; white-space: nowrap; }
.empty-state { display: none; padding: 3rem 0; color: var(--ink-soft); text-align: center; }

.theme-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-bottom: 4rem;
}

.theme-card {
  padding: 1.35rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 8px 25px rgba(15, 39, 66, 0.035);
}

.theme-card h2 { margin: 0 0 0.45rem; font-size: 1.2rem; line-height: 1.3; }
.theme-card h2 a { color: var(--navy); text-decoration: none; }
.theme-card p { margin: 0; color: var(--ink-soft); font-size: 0.92rem; line-height: 1.55; }

.topic-directory {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.65rem;
}

.topic-directory a {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.72rem 0.8rem;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  font-size: 0.9rem;
  text-decoration: none;
}

.topic-directory a:hover { color: var(--teal-dark); border-color: var(--teal); }

.post-header {
  max-width: 920px;
  margin: 0 auto clamp(2.5rem, 6vw, 4.5rem);
}

.post-header h1 { margin-top: 1rem; font-size: clamp(2.25rem, 5vw, 4.1rem); }
.post-byline { margin: 1.35rem 0 0; color: var(--ink-soft); font-size: 0.9rem; }

.article-content {
  max-width: var(--reading);
  margin-inline: auto;
  font-family: ui-serif, Georgia, Cambria, "Times New Roman", serif;
  font-size: clamp(1.05rem, 1.5vw, 1.15rem);
  line-height: 1.78;
}

.article-content > :first-child { margin-top: 0; }
.article-content p { margin: 0 0 1.35em; }
.article-content h2,
.article-content h3,
.article-content h4 {
  color: var(--navy);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: -0.035em;
  line-height: 1.2;
}

.article-content h2 { margin: 2.2em 0 0.7em; font-size: clamp(1.65rem, 4vw, 2.3rem); }
.article-content h3 { margin: 1.8em 0 0.65em; font-size: clamp(1.35rem, 3vw, 1.75rem); }
.article-content h4 { margin: 1.6em 0 0.55em; font-size: 1.2rem; }
.article-content a { overflow-wrap: anywhere; }
.article-content figure { margin: 2rem 0; }
.article-content figcaption { margin-top: 0.5rem; color: var(--ink-soft); font-family: Inter, sans-serif; font-size: 0.8rem; text-align: center; }
.article-content img { border-radius: 8px; }
.article-content blockquote {
  margin: 2rem 0;
  padding: 0.2rem 0 0.2rem 1.25rem;
  border-left: 3px solid var(--teal);
  color: #3e4a59;
}

.article-content pre,
.article-content code,
.article-content kbd { font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace; }
.article-content :not(pre) > code { padding: 0.15em 0.35em; border-radius: 5px; background: #e9eeec; font-size: 0.86em; }
.article-content pre {
  max-width: 100%;
  overflow-x: auto;
  margin: 1.7rem 0;
  padding: 1rem;
  border-radius: 10px;
  background: var(--code);
  color: #e8edf5;
  font-size: 0.84rem;
  line-height: 1.6;
  white-space: pre;
}

.article-content table { display: block; width: 100%; overflow-x: auto; margin: 1.7rem 0; border-collapse: collapse; font-family: Inter, sans-serif; font-size: 0.88rem; }
.article-content th,
.article-content td { padding: 0.6rem 0.7rem; border: 1px solid var(--line-strong); text-align: left; vertical-align: top; }
.article-content th { background: #e9eeec; color: var(--navy); }
.article-content ul,
.article-content ol { padding-left: 1.4em; }
.article-content iframe { width: 100%; border: 0; }
.article-content .aligncenter { display: block; margin-inline: auto; text-align: center; }
.article-content .alignleft { float: left; margin: 0.4rem 1.5rem 1rem 0; }
.article-content .alignright { float: right; margin: 0.4rem 0 1rem 1.5rem; }

.about-content { max-width: 820px; }
.about-content p:first-child { color: var(--navy); font-size: 1.3rem; line-height: 1.55; }
.about-content p:last-child { margin-top: 2rem; font-family: Inter, sans-serif; font-weight: 700; }

.post-navigation {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  max-width: 920px;
  margin: 4.5rem auto 0;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
}

.post-navigation a { padding: 1rem; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); text-decoration: none; }
.post-navigation a:last-child { text-align: right; }
.post-navigation small { display: block; color: var(--ink-soft); font-size: 0.72rem; font-weight: 720; letter-spacing: 0.08em; text-transform: uppercase; }
.post-navigation span { display: block; margin-top: 0.3rem; color: var(--navy); font-size: 0.92rem; font-weight: 700; line-height: 1.35; }

.site-footer { padding: 1.8rem 0; border-top: 1px solid var(--line); color: var(--ink-soft); font-size: 0.82rem; }
.footer-inner { display: flex; justify-content: space-between; gap: 1rem; }
.site-footer a { color: inherit; }

@media (max-width: 760px) {
  .site-shell { width: min(calc(100% - 28px), var(--shell)); }
  .header-inner { min-height: 68px; gap: 1rem; }
  .brand-mark { width: 38px; height: 38px; }
  .brand-tagline { display: none; }
  .site-nav { gap: 0; }
  .site-nav a { padding: 0.45rem 0.48rem; font-size: 0.82rem; }
  .hero-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .hero-note { max-width: 520px; }
  .section-heading { align-items: start; flex-direction: column; }
  .post-row { grid-template-columns: 1fr; gap: 0.5rem; }
  .post-row__arrow { display: none; }
  .filter-panel { grid-template-columns: 1fr; }
  .filter-count { padding: 0; }
  .theme-grid,
  .topic-directory { grid-template-columns: 1fr; }
  .post-navigation { grid-template-columns: 1fr; }
  .post-navigation a:last-child { text-align: left; }
  .footer-inner { flex-direction: column; }
}

@media (max-width: 520px) {
  .brand-copy { display: none; }
  .site-nav a { font-size: 0.78rem; }
  .hero h1 { font-size: 2.6rem; }
  .article-content .alignleft,
  .article-content .alignright { float: none; display: block; margin: 1.5rem auto; }
}

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