:root {
  color-scheme: light;
  --ink: #17233d;
  --paper: #f5f7fb;
  --surface: #ffffff;
  --cobalt: #2d5bce;
  --mint: #1f8a70;
  --coral: #d9574e;
  --graphite: #526078;
  --line: #ccd5e6;
  --mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--paper);
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(rgba(45, 91, 206, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(45, 91, 206, 0.045) 1px, transparent 1px),
    var(--paper);
  background-size: 48px 48px;
  font-family: "Inter", "Segoe UI", Arial, sans-serif;
}

a {
  color: inherit;
}

.skip-link {
  position: fixed;
  z-index: 10;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.65rem 0.8rem;
  color: #ffffff;
  background: var(--ink);
  transform: translateY(-180%);
}

.skip-link:focus {
  transform: translateY(0);
}

/* ── header (matches the landing) ── */

.site-header {
  display: flex;
  width: min(100% - 3rem, 1160px);
  align-items: center;
  justify-content: space-between;
  margin: 0 auto;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--line);
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-size: 1.05rem;
  font-weight: 750;
  letter-spacing: -0.025em;
  text-decoration: none;
}

.wordmark__mark {
  width: 2rem;
  height: 2rem;
  overflow: visible;
}

.wordmark__mark path {
  fill: none;
  stroke: var(--cobalt);
  stroke-linecap: square;
  stroke-width: 2;
}

.wordmark__mark circle {
  fill: var(--surface);
  stroke: var(--cobalt);
  stroke-width: 2;
}

.site-nav {
  display: inline-flex;
  gap: 1.4rem;
}

.site-nav a {
  color: var(--graphite);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-decoration: none;
  text-transform: uppercase;
}

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

/* ── article ── */

.post {
  width: min(100% - 3rem, 760px);
  margin: 0 auto;
  padding: clamp(2.5rem, 7vh, 4.5rem) 0 4rem;
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--mint);
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.post h1 {
  margin: 0 0 1.5rem;
  font-family: "Inter", "Segoe UI", Arial, sans-serif;
  font-size: clamp(1.9rem, 4.5vw, 2.7rem);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.14;
}

.post__subtitle {
  margin: -0.75rem 0 1.5rem;
  color: var(--graphite);
  font-size: clamp(1.02rem, 2vw, 1.18rem);
  font-weight: 500;
  letter-spacing: -0.012em;
  line-height: 1.45;
}

.post .post__subtitle a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.post .post__subtitle a:hover {
  color: var(--cobalt);
}

.post__meta {
  margin: 0 0 0.4rem;
  color: var(--graphite);
  font-size: 0.95rem;
  line-height: 1.6;
}

.post__meta--affil {
  font-size: 0.85rem;
}

.post__date {
  margin: 1rem 0 0;
  color: var(--graphite);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.post__rule {
  height: 1px;
  margin: 2rem 0;
  border: 0;
  background: var(--line);
}

.post h2 {
  margin: 3rem 0 1rem;
  padding-top: 2.1rem;
  border-top: 1px solid var(--line);
  font-family: "Inter", "Segoe UI", Arial, sans-serif;
  font-size: clamp(1.35rem, 2.6vw, 1.65rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.22;
}

.post h3 {
  margin: 2.4rem 0 0.8rem;
  font-size: 1.08rem;
  font-weight: 750;
  letter-spacing: -0.012em;
}

.post p,
.post li {
  font-size: 1rem;
  letter-spacing: 0.002em;
  line-height: 1.75;
}

.post p {
  margin: 1rem 0;
}

.post ul {
  padding-left: 1.3rem;
}

.post li {
  margin: 0.45rem 0;
}

.post a {
  color: var(--cobalt);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.post strong {
  font-weight: 750;
}

/* ── summary callout ── */

.callout {
  margin: 2rem 0;
  padding: 1.5rem 1.75rem;
  border: 1px solid var(--line);
  border-left: 3px solid var(--cobalt);
  background: var(--surface);
}

.callout p,
.callout li {
  font-size: 0.97rem;
}

.callout p:first-child {
  margin-top: 0;
}

.callout p:last-child {
  margin-bottom: 0;
}

.callout__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  margin-top: 1.25rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--line);
}

.callout__links a {
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.post blockquote {
  margin: 1.5rem 0;
  padding: 0.2rem 0 0.2rem 1.25rem;
  border-left: 3px solid var(--mint);
  color: var(--graphite);
}

.post blockquote strong {
  color: var(--ink);
}

.post p code,
.post li code {
  padding: 0.1rem 0.35rem;
  border: 1px solid var(--line);
  background: var(--surface);
  font-family: var(--mono);
  font-size: 0.82em;
}

/* ── blogs index cards ── */

.card-list {
  display: grid;
  gap: 1.25rem;
  margin: 2.25rem 0;
}

.card {
  display: flex;
  gap: 1.4rem;
  align-items: center;
  padding: 1.25rem;
  border: 1px solid var(--line);
  background: var(--surface);
  text-decoration: none;
  color: inherit;
  transition: border-color 150ms ease, transform 150ms ease;
}

.card:hover {
  border-color: var(--cobalt);
  transform: translateY(-2px);
}

.card:hover .card__title {
  color: var(--cobalt);
}

.card__thumb {
  width: 184px;
  height: 108px;
  flex: none;
  object-fit: cover;
  border: 1px solid var(--line);
  background: var(--surface);
}

.card__thumb--contain {
  object-fit: contain;
  border: 0;
}

.card__body {
  display: block;
  min-width: 0;
}

.card__date {
  display: block;
  margin-bottom: 0.4rem;
  color: var(--graphite);
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.card__title {
  display: block;
  color: var(--ink);
  font-size: 1.08rem;
  font-weight: 750;
  letter-spacing: -0.015em;
  line-height: 1.35;
}

.card__excerpt {
  display: block;
  margin-top: 0.45rem;
  color: var(--graphite);
  font-size: 0.93rem;
  line-height: 1.6;
}

@media (max-width: 620px) {
  .card {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ── figures ── */

.post figure {
  margin: 2rem 0;
}

.post figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  background: var(--surface);
}

.post figcaption {
  margin-top: 0.75rem;
  color: var(--graphite);
  font-size: 0.87rem;
  line-height: 1.6;
}

.post .figure--overview {
  margin: 2.5rem 0 0.5rem;
}

.post .figure--overview img {
  width: min(100%, 240px);
  margin: 0 auto;
  border: 0;
  background: transparent;
}

/* ── tables ── */

.table-wrap {
  margin: 1.75rem 0;
  overflow-x: auto;
}

.post table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
  border: 1px solid var(--line);
  font-size: 0.95rem;
}

.post th,
.post td {
  padding: 0.6rem 0.9rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
}

.post thead th {
  background: var(--paper);
}

.post th {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--graphite);
}

.post td + td,
.post th + th {
  border-left: 1px solid var(--line);
  font-variant-numeric: tabular-nums;
}

.post tr:last-child td {
  border-bottom: 0;
}

.table-note {
  margin-top: 0.7rem;
  color: var(--graphite);
  font-size: 0.88rem;
  line-height: 1.55;
}

/* ── code ── */

.post pre {
  margin: 1.75rem 0;
  padding: 1.1rem 1.3rem;
  overflow-x: auto;
  border: 1px solid var(--line);
  background: var(--surface);
}

.post code {
  font-family: var(--mono);
  font-size: 0.83rem;
  line-height: 1.55;
}

/* ── footer ── */

.site-footer {
  width: min(100% - 3rem, 1160px);
  margin: 0 auto;
  padding: 1.5rem 0 2.25rem;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  align-items: center;
  justify-content: space-between;
}

.site-footer p {
  margin: 0;
  color: var(--graphite);
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.site-footer nav {
  display: inline-flex;
  gap: 1.4rem;
}

.site-footer a {
  color: var(--graphite);
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.07em;
  text-decoration: none;
  text-transform: uppercase;
}

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

@media (max-width: 760px) {
  .site-header,
  .post,
  .site-footer {
    width: min(100% - 2rem, 1160px);
  }

  .site-nav {
    gap: 1rem;
  }
}

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

.wordmark strong {
  font-weight: 860;
}

.card__new {
  display: inline-block;
  margin-left: 0.6rem;
  padding: 0.22rem 0.55rem;
  border: 1px solid var(--coral);
  color: var(--coral);
  font-weight: 700;
  letter-spacing: 0.05em;
}