/* =============================================================
   Swiss / Neo-grotesk theme — func25.dev
   Hi-contrast, hard grid, hairline rules, one accent.
   ============================================================= */

:root {
  --ink: #111111;
  --paper: #ffffff;
  --dim: #6b6b6b;
  --faint: #9a9a9a;
  --rule: #111111;
  --hair: #d8d8d8;
  --accent: #ff2d2d;
  --code-bg: #f6f8fa;   /* GitHub code background */

  --font-sans: "Helvetica Neue", Helvetica, Arial, "Liberation Sans", sans-serif;
  --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", "Menlo", monospace;

  --maxw: 1180px;
  --readw: 680px;
  --gut: clamp(18px, 4vw, 40px);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

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

body {
  font-family: var(--font-sans);
  background: var(--paper);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "kern" 1;
}

a { color: var(--ink); text-decoration: none; }
a:hover { color: var(--accent); }

img { max-width: 100%; height: auto; display: block; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--gut); }

/* small uppercase label used everywhere */
.label {
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--dim);
}
.accent { color: var(--accent); }
.tnum { font-variant-numeric: tabular-nums; }

/* =============================================================
   Header
   ============================================================= */
.site-header {
  border-bottom: 2px solid var(--rule);
  position: sticky;
  top: 0;
  background: var(--paper);
  z-index: 50;
}
.nav {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 16px 0 14px;
  gap: 18px;
}
.site-logo {
  font-weight: 700;
  font-size: 19px;
  letter-spacing: -.02em;
  line-height: 1;
}
.site-logo small {
  display: block;
  font-weight: 400;
  font-size: 10px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--dim);
  margin-top: 4px;
}
.nav-links {
  display: flex;
  align-items: baseline;
  gap: 22px;
}
.nav-link {
  font-size: 12px;
  letter-spacing: .1em;
  text-transform: uppercase;
  font-weight: 500;
}
.nav-toggle { display: none; }

@media (max-width: 640px) {
  .nav { flex-wrap: wrap; }
  .nav-links { gap: 16px; width: 100%; flex-wrap: wrap; padding-top: 6px; }
}

/* =============================================================
   Home
   ============================================================= */
.hero {
  border-bottom: 1px solid var(--rule);
  padding: clamp(36px, 7vw, 72px) 0 clamp(28px, 5vw, 48px);
}
.hero .idx {
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 14px;
}
.hero h1 {
  font-size: clamp(38px, 8vw, 88px);
  font-weight: 700;
  letter-spacing: -.035em;
  line-height: .96;
  max-width: 16ch;
}
.hero .intro {
  margin-top: 22px;
  max-width: 56ch;
  font-size: clamp(16px, 2.2vw, 19px);
  color: var(--ink);
  line-height: 1.45;
}

/* index / post list — flex row with optional thumbnail */
.post-index { border-bottom: 2px solid var(--rule); }
.post-row {
  position: relative;
  overflow: hidden;
  display: flex;
  gap: 24px;
  align-items: flex-start;
  padding: 24px 0;
  border-top: 1px solid var(--hair);
}
.post-row:first-child { border-top: none; }
.post-row:hover { background: #fafafa; }
/* content sits above the arcane sigil layer */
.post-row > .no, .post-row > .body, .post-row > .thumb { position: relative; z-index: 2; }

/* ── Arcane rune-circle: faint rotating sigil behind the row on hover ── */
.row-sigil {
  position: absolute;
  left: 66%; top: 50%;
  width: 360px; height: 360px;
  transform: translate(-50%, -50%);
  z-index: 1;
  pointer-events: none;
  opacity: 0;
  color: var(--accent);
  transition: opacity .7s ease;
}
.row-sigil * { transform-box: fill-box; transform-origin: center; }
.row-sigil .rs-draw {
  fill: none; stroke: currentColor; stroke-width: .9;
  stroke-dasharray: 1; stroke-dashoffset: 1; pathLength: 1;
  transition: stroke-dashoffset 1.2s ease;
}
.row-sigil .rs-rune { font: 700 9px/1 var(--font-mono); fill: currentColor; opacity: 0; }
.post-row:hover .row-sigil { opacity: .2; }
.post-row:hover .rs-draw { stroke-dashoffset: 0; }
.post-row:hover .rs-rune { opacity: .8; transition: opacity .6s .7s; }
.post-row:hover .rs-spin  { animation: rs-spin 26s linear infinite; will-change: transform; }
.post-row:hover .rs-spinr { animation: rs-spin 38s linear infinite reverse; will-change: transform; }
@keyframes rs-spin { to { transform: rotate(360deg); } }
.post-row:hover h3 { text-shadow: 0 0 16px rgba(255, 45, 45, .22); }
@media (prefers-reduced-motion: reduce) {
  .post-row:hover .rs-spin, .post-row:hover .rs-spinr { animation: none; }
}
@media (max-width: 560px) { .row-sigil { left: 50%; } }
.post-row .no {
  flex: 0 0 36px;
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  line-height: 1.7;
}
.post-row .body { flex: 1 1 auto; min-width: 0; }
.post-row .body h2 {
  font-size: clamp(20px, 3vw, 27px);
  font-weight: 700;
  letter-spacing: -.02em;
  line-height: 1.1;
}
.post-row .body p {
  color: var(--dim);
  font-size: 15px;
  margin-top: 6px;
  max-width: 60ch;
}
.post-row .row-meta {
  margin-top: 12px;
  font-size: 12px;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--dim);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 12px;
}
.post-row .row-meta .tag { color: var(--ink); }
.post-row .row-meta .tag::before { content: "/ "; color: var(--faint); }
.post-row .thumb { flex: 0 0 180px; }
.post-row .thumb img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  display: block;
  border: 1px solid var(--hair);
}

/* mid widths: keep the horizontal layout, just a slightly smaller thumb */
@media (max-width: 720px) {
  .post-row { gap: 18px; }
  .post-row .thumb { flex: 0 0 150px; }
}

/* phones only: stack into a card with the image on top */
@media (max-width: 560px) {
  .post-row { flex-direction: column; gap: 10px; }
  .post-row .no { flex: none; line-height: 1.4; }
  .post-row .thumb { flex: none; width: 100%; order: -1; }
  .post-row .thumb img { aspect-ratio: 16 / 9; }
}

/* =============================================================
   List / taxonomy headers
   ============================================================= */
.section-head {
  border-bottom: 2px solid var(--rule);
  padding: clamp(30px,6vw,56px) 0 18px;
}
.section-head h1 {
  font-size: clamp(32px, 7vw, 64px);
  font-weight: 700;
  letter-spacing: -.03em;
  line-height: .98;
}
.section-head p { color: var(--dim); margin-top: 10px; max-width: 56ch; }

/* =============================================================
   Article
   ============================================================= */
.article { padding-bottom: 60px; }
.article-header {
  border-bottom: 2px solid var(--rule);
  padding: clamp(34px,6vw,64px) 0 22px;
}
.article-header .idx {
  font-size: 12px; letter-spacing: .12em; text-transform: uppercase;
  font-weight: 700; color: var(--accent); margin-bottom: 14px;
}
.article-title {
  font-size: clamp(30px, 6vw, 58px);
  font-weight: 700;
  letter-spacing: -.03em;
  line-height: 1.0;
  max-width: 20ch;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin-top: 22px;
  font-size: 12px;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--dim);
}
.article-meta .sep { color: var(--faint); }
.article-meta .tag { color: var(--ink); }

.article-featured-image {
  max-width: var(--readw);
  margin: 32px 0 0;
  border: 1px solid var(--hair);
}
.article-featured-image img { width: 100%; height: auto; display: block; }

.article-content {
  max-width: var(--readw);
  margin: 36px 0 0;
  font-size: 17.5px;
  line-height: 1.72;
}
.article-content > * + * { margin-top: 1.2em; }
.article-content h2 {
  font-size: 26px; font-weight: 700; letter-spacing: -.02em;
  margin-top: 1.9em; padding-top: .6em; border-top: 1px solid var(--hair);
  line-height: 1.15;
}
.article-content h3 { font-size: 20px; font-weight: 700; margin-top: 1.6em; }
.article-content p { }
.article-content a { text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; text-decoration-color: var(--accent); }
.article-content ul, .article-content ol { padding-left: 1.3em; }
.article-content li + li { margin-top: .4em; }
.article-content blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 18px;
  color: var(--dim);
  font-size: 18px;
}
.article-content img { margin: 1.6em 0; border: 1px solid var(--hair); }
.article-content .post-figure { margin: 1.6em 0; }
.article-content .post-figure img { margin: 0; }
.article-content .post-figure figcaption {
  margin-top: 8px;
  font-size: 13px;
  color: var(--dim);
  letter-spacing: .02em;
}
.article-content hr { border: none; border-top: 2px solid var(--rule); margin: 2em 0; }

.article-content code {
  font-family: var(--font-mono);
  font-size: .86em;
  background: var(--code-bg);
  padding: .12em .35em;
}
.article-content pre {
  font-family: var(--font-mono);
  background: var(--code-bg);
  border-left: 3px solid var(--ink);
  padding: 16px 18px;
  overflow-x: auto;
  font-size: 14px;
  line-height: 1.55;
}
.article-content pre code { background: none; padding: 0; font-size: inherit; }

.article-footer {
  max-width: var(--readw);
  margin-top: 44px;
  padding-top: 22px;
  border-top: 2px solid var(--rule);
}

/* =============================================================
   Newsletter block
   ============================================================= */
.newsletter {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 2px solid var(--rule);
  border-bottom: 2px solid var(--rule);
}
.newsletter > div { padding: clamp(24px,4vw,40px) 0; }
.newsletter > div:first-child { padding-right: var(--gut); }
.newsletter > div:last-child { padding-left: var(--gut); border-left: 1px solid var(--rule); }
.newsletter h2 {
  font-size: clamp(24px,4vw,40px); font-weight: 700; letter-spacing: -.025em; line-height: 1;
}
.newsletter p { color: var(--dim); margin-top: 10px; max-width: 40ch; }
.newsletter form { display: flex; flex-direction: column; gap: 10px; max-width: 360px; }
.newsletter input {
  border: 1px solid var(--ink);
  padding: 13px 14px;
  font-family: inherit;
  font-size: 15px;
  width: 100%;
  background: var(--paper);
}
.newsletter input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.newsletter button {
  background: var(--ink);
  color: var(--paper);
  border: none;
  padding: 13px 0;
  font-family: inherit;
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  font-weight: 700;
  cursor: pointer;
}
.newsletter button:hover { background: var(--accent); }
@media (max-width: 640px) {
  .newsletter { grid-template-columns: 1fr; }
  .newsletter > div:last-child { border-left: none; border-top: 1px solid var(--rule); padding-left: 0; }
  .newsletter > div:first-child { padding-right: 0; }
}

/* Newsletter form states (Swiss form -> Worker -> MailerLite) */
.nl-hp { position: absolute !important; left: -9999px !important; width: 1px; height: 1px; opacity: 0; }
.nl-msg { font-size: 13px; margin-top: 4px; min-height: 1em; }
.nl-msg.is-ok { color: #1a7f37; }
.nl-msg.is-err { color: var(--accent); }
.nl-form button[disabled] { opacity: .6; cursor: progress; }

/* =============================================================
   About / prose pages
   ============================================================= */
.page { padding-bottom: 60px; }
.page-content {
  max-width: var(--readw);
  margin-top: 36px;
  font-size: 17.5px;
  line-height: 1.72;
}
.page-content > * + * { margin-top: 1.1em; }
.page-content h2 { font-size: 22px; font-weight: 700; margin-top: 1.6em; }
.page-content a { text-decoration: underline; text-underline-offset: 3px; text-decoration-color: var(--accent); }
.page-content ul { padding-left: 1.3em; }

/* =============================================================
   Pagination
   ============================================================= */
.pagination {
  display: flex; justify-content: space-between; align-items: center;
  padding: 26px 0; font-size: 12px; letter-spacing: .1em; text-transform: uppercase; font-weight: 600;
}
.pagination a:hover { color: var(--accent); }
.pagination .disabled { color: var(--faint); }

/* =============================================================
   Footer
   ============================================================= */
.site-footer {
  border-top: 2px solid var(--rule);
  margin-top: 60px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 24px;
  padding: 36px 0 48px;
}
.footer-grid .brand { font-weight: 700; font-size: 18px; letter-spacing: -.02em; }
.footer-grid p { color: var(--dim); font-size: 13px; margin-top: 8px; max-width: 38ch; }
.footer-col h4 { font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--dim); margin-bottom: 10px; }
.footer-col a { display: block; font-size: 14px; padding: 3px 0; }
.footer-legal {
  border-top: 1px solid var(--hair);
  padding: 14px 0 30px;
  font-size: 11px;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--faint);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px;
}
@media (max-width: 640px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid .brand { grid-column: 1 / -1; }
}