/* ============================================================
   constans.dev — production styles
   Plain CSS, monospace + terracotta, light/dark via prefers-color-scheme.
   ============================================================ */

@font-face {
  font-family: "JetBrains Mono";
  src: url("/fonts/JetBrainsMono-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("/fonts/JetBrainsMono-Medium.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("/fonts/JetBrainsMono-SemiBold.woff2") format("woff2");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("/fonts/JetBrainsMono-Bold.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

:root {
  --bg: #fafaf7;
  --bg-2: #f1f0eb;
  --fg: #1a1a18;
  --fg-2: #4a4a47;
  --fg-3: #8a8a85;
  --rule: #d5d3cc;
  --rule-strong: #a8a59c;
  --accent: #d97757;

  --font-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --measure: 60ch;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16161a;
    --bg-2: #1f1f24;
    --fg: #f4f3ef;
    --fg-2: #c4c2ba;
    --fg-3: #7a7872;
    --rule: #2e2e34;
    --rule-strong: #4a4a52;
    --accent: #e08a6a;
  }
}

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

body {
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.6;
  background: var(--bg);
  color: var(--fg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--fg);
  text-decoration: none;
  border-bottom: 1px dotted var(--rule-strong);
  transition: color 120ms, border-color 120ms;
}
a:hover { color: var(--accent); border-bottom-color: var(--accent); }
a.naked { border-bottom: 0; }
a.naked:hover { color: var(--accent); }

/* Accent period (the design signature) */
.dot { color: var(--accent); }

::selection { background: var(--accent); color: var(--bg); }

/* Tag pill — used in project meta, paper meta, blog meta, etc. */
.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.02em;
  color: var(--fg-2);
  background: var(--bg-2);
  border: 1px solid var(--rule);
  padding: 1px 7px;
  border-radius: 3px;
  margin-right: 4px;
}

/* Page shell */
.page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 4vh clamp(1.25rem, 4vw, 3rem) 6vh;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Top nav: small mono links, unobtrusive */
header.top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 2rem;
  padding-bottom: 2rem;
  margin-bottom: 4vh;
  border-bottom: 1px solid var(--rule);
  flex-wrap: wrap;
}
header.top .id {
  font-size: 0.85rem;
  letter-spacing: -0.01em;
  color: var(--fg);
}
header.top .id a { border: 0; }
header.top nav {
  display: flex;
  gap: 1.5rem;
  font-size: 0.78rem;
  color: var(--fg-3);
}
header.top nav a {
  border-bottom: 0;
  color: var(--fg-2);
}
header.top nav a:hover { color: var(--accent); }
header.top nav a[aria-current="page"] { color: var(--accent); }
header.top nav a[aria-current="page"]::before { content: "→ "; }

/* Main content area */
main { flex: 1; }

/* Footer */
footer.site {
  margin-top: 6vh;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  font-size: 0.74rem;
  color: var(--fg-3);
}
footer.site a { color: var(--fg-2); border-bottom: 0; }
footer.site a:hover { color: var(--accent); }
footer.site .lf, footer.site .rt { display: flex; gap: 1rem; flex-wrap: wrap; }
footer.site .sep { color: var(--rule-strong); }

/* ============================================================
   Home page (hero-only)
   ============================================================ */
.home {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 3rem;
  align-items: end;
  padding: clamp(2rem, 8vh, 6rem) 0 clamp(2rem, 6vh, 4rem);
  border-bottom: 2px solid var(--fg);
}
.home .name-block h1 {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(2.6rem, 7.2vw, 5.5rem);
  line-height: 0.95;
  letter-spacing: -0.04em;
  color: var(--fg);
}
.home .name-block h1 .l1,
.home .name-block h1 .l2 { display: block; }
/* Kern "Constans." to match the width of "J. Michael" (10ch vs 9ch) */
.home .name-block h1 .l2 { letter-spacing: calc(1ch / 8 - 0.04em); }

.home .side {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding-bottom: 0.5rem;
}
.home .lede {
  margin: 0;
  font-size: clamp(0.95rem, 1.05vw, 1.1rem);
  line-height: 1.55;
  color: var(--fg-2);
  text-wrap: balance;
  max-width: 38ch;
}
.home .socials {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}
.home .socials a {
  font-size: 0.78rem;
  color: var(--fg-2);
  border: 1px solid var(--rule-strong);
  border-bottom: 1px solid var(--rule-strong);
  padding: 0.35rem 0.75rem;
  border-radius: 2px;
}
.home .socials a:hover { color: var(--accent); border-color: var(--accent); }

/* Below the rule: tiny way-finding to subpages */
.home-nav {
  padding: 2.5rem 0 0;
  display: flex;
  gap: 2.5rem;
  flex-wrap: wrap;
}
.home-nav a {
  font-size: 0.92rem;
  color: var(--fg-2);
  border-bottom: 0;
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
}
.home-nav a::before {
  content: "→";
  color: var(--accent);
  transition: transform 150ms;
}
.home-nav a:hover { color: var(--accent); }
.home-nav a:hover::before { transform: translateX(2px); }
.home-nav a .ctx {
  color: var(--fg-3);
  font-size: 0.78rem;
  margin-left: 0.4rem;
}

@media (max-width: 720px) {
  .home { grid-template-columns: 1fr; gap: 2rem; align-items: start; }
  .home-nav { gap: 1rem; flex-direction: column; }
  .home .side { padding-bottom: 0; }
  header.top { gap: 1rem; }
  header.top nav { gap: 0.9rem; font-size: 0.72rem; }
}

/* ============================================================
   Generic subpage chrome (page title, prose)
   ============================================================ */
.page-title {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(2rem, 5vw, 3.5rem);
  letter-spacing: -0.03em;
  line-height: 1;
  margin: 1rem 0 0.5rem;
  color: var(--fg);
}
.page-title .dot { color: var(--accent); }
.page-sub {
  font-size: 0.78rem;
  color: var(--fg-3);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 3rem;
}
.page-content {
    max-width: 65;
    line-height: 1.6;
}

/* ============================================================
   /projects — project entries
   ============================================================ */
.proj-list {
  display: flex;
  flex-direction: column;
}
.proj-entry {
  display: grid;
  grid-template-columns: 1fr 220px;
  gap: 2rem;
  padding: 2rem 0;
  border-top: 1px solid var(--rule);
}
.proj-entry:last-child { border-bottom: 1px solid var(--rule); }
.proj-entry h2 {
  margin: 0 0 0.5rem;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.4rem;
  letter-spacing: -0.02em;
}
.proj-entry h2 a { border: 0; }
.proj-entry h2 a::after { content: " ↗"; color: var(--fg-3); font-size: 0.85em; }
.proj-entry h2 a:hover::after { color: var(--accent); }
.proj-entry p { margin: 0 0 1rem; color: var(--fg-2); font-size: 0.92rem; line-height: 1.65; max-width: 56ch; }
.proj-entry .meta {
  font-size: 0.72rem;
  color: var(--fg-3);
  letter-spacing: 0.04em;
}
.proj-entry .meta .tag {
  background: var(--bg-2);
  border: 1px solid var(--rule);
  padding: 1px 7px;
  border-radius: 3px;
  margin-right: 4px;
  color: var(--fg-2);
}
.proj-entry .thumb {
  background:
    repeating-linear-gradient(45deg, var(--bg-2) 0 10px, var(--rule) 10px 11px);
  border: 1px solid var(--rule);
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--fg-3);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
@media (max-width: 720px) {
  .proj-entry { grid-template-columns: 1fr; gap: 1rem; }
}

/* ============================================================
   /blog — post index
   ============================================================ */
.post-index { display: flex; flex-direction: column; }
.post-row {
  display: grid;
  grid-template-columns: 7rem 1fr;
  gap: 1.5rem;
  padding: 1.25rem 0;
  border-top: 1px solid var(--rule);
  align-items: baseline;
  color: inherit;
  border-bottom: 0;
}
.post-row:last-child { border-bottom: 1px solid var(--rule); }
.post-row .date { font-size: 0.78rem; color: var(--fg-3); letter-spacing: 0.04em; }
.post-row .title { font-size: 1.05rem; letter-spacing: -0.01em; }
.post-row:hover .title { color: var(--accent); }
.post-row p.excerpt { margin: 0.35rem 0 0; color: var(--fg-2); font-size: 0.88rem; max-width: 64ch; }

/* ============================================================
   /papers — index + detail
   ============================================================ */

/* shared action button used on paper pages */
.act-row {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin: 1.25rem 0;
}
.act {
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--fg);
  border: 1px solid var(--rule-strong);
  padding: 0.5rem 0.9rem;
  border-radius: 3px;
  background: var(--bg);
  text-decoration: none;
}
.act:hover { color: var(--accent); border-color: var(--accent); }
.act.primary {
  background: var(--fg);
  color: var(--bg);
  border-color: var(--fg);
}
.act.primary:hover { background: var(--accent); border-color: var(--accent); color: var(--bg); }
.act .arr { color: var(--fg-3); }
.act.primary .arr { color: color-mix(in oklab, var(--bg) 70%, transparent); }
.act:hover .arr { color: var(--accent); }
.act.primary:hover .arr { color: var(--bg); }

/* Single paper detail */
.paper {
  max-width: 68ch;
  margin: 0 auto;
}
.paper .paper-head {
  padding: 1rem 0 2rem;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 2rem;
}
.paper .paper-kicker {
  font-size: 0.72rem; color: var(--fg-3);
  letter-spacing: 0.12em; text-transform: uppercase;
  margin: 0 0 0.75rem;
}
.paper .paper-head h1 {
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.6rem, 3.6vw, 2.4rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
  text-wrap: balance;
}
.paper .paper-meta {
  display: flex; flex-wrap: wrap; gap: 0.4rem 1.25rem;
  font-size: 0.78rem; color: var(--fg-2);
  margin: 0;
}
.paper .paper-meta .l { color: var(--fg-3); margin-right: 0.4rem; text-transform: uppercase; letter-spacing: 0.08em; font-size: 0.7rem; }
.paper .abstract h2 {
  font-family: var(--font-mono); font-weight: 600;
  font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--fg-3); margin: 0 0 0.75rem;
}
.paper .abstract p {
  margin: 0 0 1rem;
  font-size: 1rem; line-height: 1.7; color: var(--fg);
}
.paper details.bib {
  margin-top: 2rem;
  border-top: 1px solid var(--rule);
  padding-top: 1rem;
}
.paper details.bib summary {
  cursor: pointer;
  font-size: 0.78rem; color: var(--fg-2);
  letter-spacing: 0.04em;
  list-style: none;
}
.paper details.bib summary::-webkit-details-marker { display: none; }
.paper details.bib summary::before {
  content: "▸ "; color: var(--accent);
}
.paper details.bib[open] summary::before { content: "▾ "; }
.paper details.bib pre {
  margin: 0.75rem 0 0;
  background: var(--bg-2);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 0.9rem 1rem;
  font-size: 0.78rem;
  overflow-x: auto;
}

/* ============================================================
   /blog/[post] — single post template
   ============================================================ */
.post {
  max-width: 68ch;
  margin: 0 auto;
}
.post header.post-head {
  padding: 1rem 0 3rem;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 2.5rem;
}
.post header.post-head .post-date {
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-3);
  margin: 0 0 0.75rem;
}
.post header.post-head h1 {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
  text-wrap: balance;
}
.post .post-body {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--fg);
}
.post .post-body p { margin: 0 0 1.25rem; }
.post .post-body p:first-child::first-letter { color: var(--accent); }
.post .post-body blockquote {
  margin: 1.5rem 0;
  padding: 0.25rem 0 0.25rem 1.5rem;
  border-left: 2px solid var(--accent);
  color: var(--fg-2);
  font-style: normal;
}
.post .post-body blockquote p:last-child { margin-bottom: 0; }
.post .post-body h2 {
  font-size: 1.2rem;
  margin: 2rem 0 0.75rem;
  letter-spacing: -0.01em;
}
.post .post-body code {
  background: var(--bg-2);
  border: 1px solid var(--rule);
  padding: 0 4px;
  border-radius: 3px;
  font-size: 0.9em;
}
.post .post-body pre {
  background: var(--bg-2);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 1rem;
  overflow-x: auto;
  font-size: 0.85rem;
}
.post .post-foot {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
  display: flex;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--fg-3);
}
.post .post-foot a { border-bottom: 0; color: var(--fg-2); }
.post .post-foot a:hover { color: var(--accent); }

/* ============================================================
   /writing — mixed feed (papers + notes) + kind badge
   ============================================================ */
.w-mixed { display: flex; flex-direction: column; }
.w-mixed .row {
  display: grid;
  grid-template-columns: 5.5rem 1fr;
  gap: 1.5rem;
  padding: 1rem 0;
  border-top: 1px solid var(--rule);
  color: inherit;
  border-bottom: 0;
  align-items: baseline;
}
.w-mixed .row:last-child { border-bottom: 1px solid var(--rule); }
.w-mixed .row .date {
  font-size: 0.78rem;
  color: var(--fg-3);
  letter-spacing: 0.04em;
}
.w-mixed .row .title { font-size: 1rem; line-height: 1.35; }
.feed-link { margin-top: 2rem; color: var(--fg-3); font-size: 0.78rem; }
.w-mixed .row:hover .title { color: var(--accent); }
.w-mixed .row p {
  margin: 0.35rem 0 0;
  color: var(--fg-2);
  font-size: 0.88rem;
  max-width: 64ch;
  line-height: 1.55;
}

/* Kind badge ([note] / [paper]) */
.kind {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  padding: 1px 7px;
  border-radius: 3px;
  border: 1px solid var(--rule);
  background: var(--bg-2);
  color: var(--fg-2);
  vertical-align: 1px;
  margin-right: 0.5rem;
}
.kind.paper {
  border-color: var(--accent);
  color: var(--accent);
  background: transparent;
}

/* ============================================================
   Single note / paper layout with sticky side meta
   ============================================================ */
.post-sidekick {
  display: grid;
  grid-template-columns: 11rem 1fr;
  gap: 3rem;
  max-width: 980px;
  margin: 0 auto;
}
.post-sidekick aside.meta {
  position: sticky;
  top: 2rem;
  align-self: start;
  font-size: 0.78rem;
  color: var(--fg-3);
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  padding-top: 0.5rem;
}
.post-sidekick aside.meta .row {
  /* Override .w-mixed .row grid that might cascade — sidebar rows are simple flex */
  display: block;
  padding: 0;
  border: 0;
  grid-template-columns: none;
}
.post-sidekick aside.meta .row .l {
  display: block;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.68rem;
  color: var(--fg-3);
}
.post-sidekick aside.meta .row .v { color: var(--fg-2); font-size: 0.85rem; }
.post-sidekick aside.meta .row .v a { color: var(--fg-2); border-bottom-style: dotted; }
.post-sidekick aside.meta .row .v a:hover { color: var(--accent); }
.post-sidekick aside.meta .row .v-accent { color: var(--accent); }
.post-sidekick aside.meta .row-pdf { margin-top: 0.5rem; }
.act-sm { font-size: 0.78rem; padding: 0.4rem 0.8rem; }
.post-sidekick .post { margin: 0; max-width: 60ch; }
.post-sidekick .post header.post-head h1 { margin-top: 0.5rem; }
.post-sidekick .paper { margin: 0; max-width: 60ch; }

@media (max-width: 760px) {
  .post-sidekick { grid-template-columns: 1fr; gap: 1rem; }
  .post-sidekick aside.meta {
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 1rem;
  }
}


/* ============================================================
   /projects — case-study cards (the v2 variant we shipped)
   ============================================================ */
.proj-cases { display: flex; flex-direction: column; gap: 3rem; }
.case .case-thumb {
  background: repeating-linear-gradient(45deg, var(--bg-2) 0 12px, var(--rule) 12px 13px);
  border: 1px solid var(--rule);
  aspect-ratio: 21 / 9;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--fg-3);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
  overflow: hidden;
}
.case .case-thumb:has(img) {
  background: none;
  aspect-ratio: auto;
    padding: 0;
    width: 100%;
    max-width: 400px;
}
.case .case-thumb img {
  display: block;
  width: 100%;
  height: auto;
}
.case .case-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.72rem;
  color: var(--fg-3);
  letter-spacing: 0.04em;
  margin-bottom: 0.5rem;
}
.case h2 {
  margin: 0 0 0.75rem;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  letter-spacing: -0.03em;
  line-height: 1.05;
}
.case h2 a { border: 0; }
.case h2 a::after { content: " ↗"; color: var(--fg-3); font-size: 0.7em; }
.case h2 a:hover::after { color: var(--accent); }
.case p.body {
  margin: 0 0 0.5rem;
  color: var(--fg-2);
  max-width: 64ch;
  font-size: 0.95rem;
  line-height: 1.65;
}
.case .case-tags {
  font-size: 0.72rem;
  color: var(--fg-3);
  margin-top: 0.5rem;
}

/* ============================================================
   /publickey — PGP fingerprint + key block
   ============================================================ */
.pgp-fingerprint {
  color: var(--fg-2);
  font-size: 0.9rem;
  margin: 0 0 1.5rem;
  word-wrap: break-word;
}
.pgp-fingerprint-label {
  display: inline-block;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-3);
  margin-right: 0.6rem;
}
.pgp-fingerprint code {
  font-family: var(--font-mono);
  background: var(--bg-2);
  border: 1px solid var(--rule);
  padding: 0.15rem 0.4rem;
  border-radius: 3px;
  font-size: 0.85rem;
}
.pgp-key {
  background: var(--bg-2);
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 1.25rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--fg-2);
  margin: 0 0 1.5rem;
}

/* Question mark with accent dot — overlays the glyph's own dot.
   JetBrains Mono 700 metrics: the '?' dot is a 0.17em × 0.13em ellipse
   sitting on the baseline. With line-height: 1 the baseline lands
   0.14em from the inline-block's bottom edge. Defaults add a hair
   of margin so anti-aliased edges of the underlying dot don't peek.

   --qm-x: horizontal nudge (positive = right). Per-instance tweak
   for the rare case where rendering needs a half-pixel correction. */
.qm {
  position: relative;
  display: inline-block;
  line-height: 1;            /* predictable coord system */
  vertical-align: baseline;
}
.qm::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: var(--qm-bottom, 0.13em);
  width:  var(--qm-w, 0.18em);
  height: var(--qm-h, 0.14em);
  background: var(--accent);
  border-radius: 50%;
  transform: translateX(calc(-50% + var(--qm-x, 0em)));
  pointer-events: none;
}