/* AI Engineering Digest — editorial, ink-on-newsprint, dark */
:root {
  --bg: #12110f;
  --paper: #1a1815;
  --ink: #ece6da;
  --ink-soft: #c9c1b2;
  --muted: #8a8274;
  --faint: #5c564c;
  --rule: #2c2924;
  --rule-strong: #3f3a32;
  --accent: #c96f3c;
  --accent-hover: #e08a56;
  --vendor-bg: #2a2414;
  --vendor-ink: #d4b056;
  --vendor-edge: #5a4a1e;
  --link: #d8b48a;
  --focus: #e8c9a0;
  --max: 40rem;
}

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

html {
  font-size: 18px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, "Times New Roman", serif;
  line-height: 1.55;
  font-feature-settings: "kern", "liga", "onum";
}

a {
  color: var(--link);
  text-underline-offset: 0.15em;
  text-decoration-thickness: 1px;
}

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

a:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

.wrap {
  max-width: calc(var(--max) + 2.5rem);
  margin: 0 auto;
  padding: 0 1.25rem 4rem;
}

/* Masthead */
.masthead {
  padding: 1.75rem 0 1.25rem;
  border-bottom: 1px solid var(--rule-strong);
}

.brand-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.wordmark {
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
  font-family: ui-sans-serif, "Helvetica Neue", Helvetica, Arial, sans-serif;
}

.nav {
  display: flex;
  gap: 1.1rem;
  font-family: ui-sans-serif, "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
}

.nav a {
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

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

.issue-head {
  padding: 2.1rem 0 1.6rem;
}

.kicker {
  margin: 0 0 0.55rem;
  font-family: ui-sans-serif, "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 7vw, 2.85rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.08;
}

.subtitle {
  margin: 0.65rem 0 0;
  color: var(--ink-soft);
  font-size: 1.05rem;
  font-style: italic;
}

.dateline {
  margin: 1.15rem 0 0;
  padding-top: 0.85rem;
  border-top: 1px solid var(--rule);
  font-family: ui-sans-serif, "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

.window {
  display: block;
  margin-top: 0.35rem;
  letter-spacing: 0.02em;
  text-transform: none;
  font-size: 0.8rem;
}

.subscribe {
  margin: 0 0 2rem;
  padding: 0.85rem 1rem;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-left: 3px solid var(--accent);
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.subscribe a { font-style: italic; }

/* Sections */
.section {
  margin: 0 0 2.4rem;
  padding-top: 0.4rem;
}

.section + .section {
  border-top: 1px solid var(--rule-strong);
  padding-top: 1.8rem;
}

.section-label {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  margin: 0 0 1.15rem;
}

.section-num {
  font-family: ui-sans-serif, "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  color: var(--accent);
  flex: none;
}

.section h2 {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: -0.015em;
}

/* Items */
.item {
  margin: 0 0 1.45rem;
}

.item h3 {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.3;
}

.item h3 a {
  color: var(--ink);
  text-decoration: none;
  background-image: linear-gradient(to right, var(--rule-strong), var(--rule-strong));
  background-position: 0 100%;
  background-repeat: no-repeat;
  background-size: 100% 1px;
}

.item h3 a:hover { color: var(--accent-hover); }

.item p {
  margin: 0 0 0.45rem;
  color: var(--ink-soft);
  font-size: 0.98rem;
}

.item .aside {
  color: var(--muted);
  font-size: 0.9rem;
  font-style: italic;
}

.meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 0.7rem;
  margin: 0.15rem 0 0;
  font-family: ui-sans-serif, "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 0.72rem;
  color: var(--faint);
  letter-spacing: 0.02em;
}

.meta time { color: var(--muted); }

.sources {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.85rem;
}

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

.sources a:hover { color: var(--link); }

.sources a::after {
  content: " ↗";
  font-size: 0.85em;
  opacity: 0.7;
}

.vendor {
  display: inline-block;
  margin: 0 0.15em;
  padding: 0.05em 0.38em 0.08em;
  border: 1px solid var(--vendor-edge);
  background: var(--vendor-bg);
  color: var(--vendor-ink);
  font-family: ui-sans-serif, "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 0.62rem;
  font-style: normal;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  vertical-align: 0.12em;
  line-height: 1.4;
}

code, .cmd {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.82em;
  color: #e4d3b4;
  background: #241f1a;
  padding: 0.08em 0.32em;
  border-radius: 3px;
}

.note {
  margin-top: 2.2rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--rule-strong);
  color: var(--muted);
  font-size: 0.88rem;
}

.note h2 {
  margin: 0 0 0.5rem;
  font-size: 0.95rem;
  color: var(--ink-soft);
}

footer {
  margin-top: 2.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
  color: var(--faint);
  font-family: ui-sans-serif, "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
}

/* Archive list */
.issue-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.issue-list li {
  border-bottom: 1px solid var(--rule);
}

.issue-list a {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.95rem 0;
  color: var(--ink);
  text-decoration: none;
}

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

.issue-list .when {
  color: var(--muted);
  font-family: ui-sans-serif, "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 0.78rem;
  flex: none;
}

/* About */
.prose p { color: var(--ink-soft); }
.prose ul {
  color: var(--ink-soft);
  padding-left: 1.15rem;
}
.prose li { margin: 0.35rem 0; }

@media (max-width: 40rem) {
  html { font-size: 17px; }
  .wrap { padding: 0 1rem 3.5rem; }
  .item h3 { font-size: 1.02rem; }
}