/* =====================================================================
   SIGNAL — alxjrvs.github.io
   Futura display · smooth serif body · rationed red · light + dark
   All system fonts. No webfont load.
   ===================================================================== */

/* ---- tokens: light is the base ---- */
:root {
  --paper:   #ece8dd;
  --ink:     #16150f;
  --mute:    #6a675c;
  --red:     #dd2f1c;
  --hair:    rgba(22, 21, 15, .16);
  --hair-soft: rgba(22, 21, 15, .09);
  --code-bg: rgba(22, 21, 15, .06);
  --sel:     rgba(221, 47, 28, .18);

  --grot:  "Futura", "Century Gothic", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --serif: "Iowan Old Style", "Charter", "Palatino Linotype", Palatino, Georgia, serif;
  --mono:  "Menlo", "SF Mono", ui-monospace, SFMono-Regular, monospace;

  --measure: 66ch;
  --edge: clamp(20px, 5vw, 64px);
}

/* no-JS fallback: honor the OS theme */
@media (prefers-color-scheme: dark) {
  :root {
    --paper:   #17160f;
    --ink:     #ece8dd;
    --mute:    #928f81;
    --red:     #e6543f;
    --hair:    rgba(236, 232, 221, .16);
    --hair-soft: rgba(236, 232, 221, .08);
    --code-bg: rgba(236, 232, 221, .07);
    --sel:     rgba(230, 84, 63, .26);
  }
}

/* explicit toggle wins over the media query, both directions */
:root[data-theme="light"] {
  --paper: #ece8dd; --ink: #16150f; --mute: #6a675c; --red: #dd2f1c;
  --hair: rgba(22,21,15,.16); --hair-soft: rgba(22,21,15,.09);
  --code-bg: rgba(22,21,15,.06); --sel: rgba(221,47,28,.18);
}
:root[data-theme="dark"] {
  --paper: #17160f; --ink: #ece8dd; --mute: #928f81; --red: #e6543f;
  --hair: rgba(236,232,221,.16); --hair-soft: rgba(236,232,221,.08);
  --code-bg: rgba(236,232,221,.07); --sel: rgba(230,84,63,.26);
}

/* ---- reset-ish ---- */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
::selection { background: var(--sel); }
img { max-width: 100%; height: auto; }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--red); outline-offset: 3px; }

.skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--red); color: #fff; padding: 8px 12px;
  font-family: var(--mono); font-size: 12px; z-index: 50;
}
.skip:focus { left: 8px; top: 8px; }

/* ---- shared layout shell ---- */
.shell { max-width: 1140px; margin: 0 auto; padding: 0 var(--edge); }
.reading { max-width: var(--measure); }

/* the red square, the one recurring mark */
.sq {
  display: inline-block; width: .62em; height: .62em;
  background: var(--red); vertical-align: baseline;
}

/* =====================================================================
   MASTHEAD
   ===================================================================== */
.masthead {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; flex-wrap: wrap;
  padding: 22px 0 18px;
  border-bottom: 1.5px solid var(--ink);
}
.brand {
  font-family: var(--grot); font-weight: 700; font-size: 18px;
  letter-spacing: -.02em; text-transform: lowercase; text-decoration: none;
  color: var(--ink);
}
.nav {
  display: flex; align-items: center; gap: 18px; flex-wrap: wrap;
  font-family: var(--grot); font-weight: 700; font-size: 11px;
  letter-spacing: .16em; text-transform: uppercase;
}
.nav a {
  text-decoration: none; color: var(--ink);
  padding-bottom: 2px; border-bottom: 2px solid transparent;
}
.nav a:hover { color: var(--red); border-color: var(--red); }
.nav a[aria-current="page"] { border-color: var(--ink); }

/* theme toggle — the red square that flips */
.toggle {
  display: inline-flex; align-items: center; gap: 7px;
  background: none; border: 0; cursor: pointer; padding: 4px 0;
  font-family: var(--mono); font-size: 10px; letter-spacing: .12em;
  text-transform: uppercase; color: var(--mute);
}
.toggle .knob { width: 13px; height: 13px; background: var(--red); flex: none; }
.toggle:hover { color: var(--red); }
.toggle .lbl::before { content: "dark"; }
:root[data-theme="dark"] .toggle .lbl::before { content: "light"; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .toggle .lbl::before { content: "light"; }
}

/* =====================================================================
   FOOTER / COLOPHON LINE
   ===================================================================== */
.footer {
  margin-top: clamp(48px, 9vw, 104px);
  padding: 20px 0 40px;
  border-top: 1.5px solid var(--ink);
  display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap;
  font-family: var(--mono); font-size: 11px; letter-spacing: .04em;
  color: var(--mute);
}
.footer a { color: var(--mute); text-decoration: none; }
.footer a:hover { color: var(--red); }

/* =====================================================================
   HOME / LANDING
   ===================================================================== */
.hero { padding: clamp(40px, 9vw, 104px) 0 clamp(30px, 6vw, 64px); }
.wordmark {
  font-family: var(--grot); font-weight: 700;
  font-size: clamp(58px, 13vw, 132px); letter-spacing: -.035em;
  line-height: .82; text-transform: lowercase; margin: 0;
}
.hero .rule { height: 7px; width: min(38%, 280px); background: var(--red); margin: 18px 0 16px; }
.hero .tagline {
  font-family: var(--serif); font-size: clamp(18px, 2.4vw, 23px);
  line-height: 1.4; max-width: 34ch; margin: 0;
}
.hero .tagline em { font-style: normal; color: var(--red); }
/* the dice that ends the sentence — a die face as the full stop, click to roll */
.die-btn {
  appearance: none; -webkit-appearance: none; background: none; border: 0;
  padding: 0; margin: 0 0 0 .04em; line-height: 0; cursor: pointer;
  vertical-align: baseline; color: inherit;
}
.die-btn:focus-visible { outline: 2px solid var(--red); outline-offset: 3px; }
.die { width: .23em; height: .23em; vertical-align: baseline; transform-origin: center; transition: transform .15s ease; }
.die .die-face { fill: var(--red); }
.die .die-pips circle { fill: var(--paper); }
.die-btn:hover .die { transform: rotate(14deg) scale(1.25); }
.die-btn.rolling .die { animation: dieroll .42s linear infinite; }
@keyframes dieroll { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) {
  .die { transition: none; }
  .die-btn:hover .die, .die-btn.rolling .die { animation: none; transform: none; }
}

.columns {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(24px, 5vw, 56px);
  padding: clamp(20px, 4vw, 40px) 0;
}
@media (max-width: 620px) { .columns { grid-template-columns: 1fr; } }
.col h2 {
  font-family: var(--mono); font-weight: 400; font-size: 10.5px;
  letter-spacing: .18em; text-transform: uppercase; color: var(--mute);
  margin: 0 0 12px;
}
.linklist { list-style: none; margin: 0; padding: 0; }
.linklist li { border-top: 1px solid var(--hair-soft); }
.linklist li:last-child { border-bottom: 1px solid var(--hair-soft); }
.linklist a {
  display: flex; align-items: baseline; gap: 11px;
  padding: 10px 0; text-decoration: none; color: var(--ink);
  font-family: var(--grot); font-weight: 500; font-size: 16px;
}
.linklist a .t { flex: 1; }
.linklist a .d { font-family: var(--mono); font-size: 11px; color: var(--mute); font-variant-numeric: tabular-nums; }
.linklist a:hover { color: var(--red); }
.linklist a:hover .bul { visibility: visible; }
.linklist .bul { width: 8px; height: 8px; background: var(--red); flex: none; transform: translateY(-1px); visibility: hidden; }
.linklist.always .bul { visibility: visible; }
.empty { font-family: var(--serif); font-style: italic; font-size: 16px; color: var(--mute); margin: 10px 0 0; }
.empty--page { margin-top: clamp(20px, 4vw, 36px); }

/* =====================================================================
   PAGE HEADERS (writing, work, colophon)
   ===================================================================== */
.pagehead { padding: clamp(36px, 7vw, 72px) 0 8px; }
.eyebrow {
  font-family: var(--mono); font-size: 11px; letter-spacing: .18em;
  text-transform: uppercase; color: var(--mute); margin: 0 0 6px;
}
.pagehead h1 {
  font-family: var(--grot); font-weight: 700;
  font-size: clamp(34px, 6vw, 58px); letter-spacing: -.03em;
  text-transform: lowercase; line-height: .92; margin: 0;
}

/* post archive list */
.archive { list-style: none; margin: clamp(20px,4vw,36px) 0 0; padding: 0; }
.archive li { border-top: 1px solid var(--hair-soft); }
.archive li:last-child { border-bottom: 1px solid var(--hair-soft); }
.archive a {
  display: flex; align-items: baseline; gap: 13px; padding: 13px 0;
  text-decoration: none; color: var(--ink);
}
.archive .bul { width: 9px; height: 9px; background: var(--red); flex: none; transform: translateY(-2px); }
.archive .t { flex: 1; font-family: var(--grot); font-weight: 500; font-size: clamp(16px, 2.4vw, 19px); letter-spacing: -.01em; }
.archive .d { font-family: var(--mono); font-size: 11px; color: var(--mute); font-variant-numeric: tabular-nums; }
.archive a:hover .t { color: var(--red); }

/* work cards */
.projects { list-style: none; margin: clamp(20px,4vw,36px) 0 0; padding: 0; }
.projects li { border-top: 1px solid var(--hair-soft); padding: 16px 0; }
.projects li:last-child { border-bottom: 1px solid var(--hair-soft); }
.projects .pname {
  font-family: var(--grot); font-weight: 700; font-size: 19px; letter-spacing: -.01em;
  text-decoration: none; color: var(--ink); display: inline-flex; align-items: baseline; gap: 9px;
}
.projects .pname:hover { color: var(--red); }
.projects .pblurb { font-family: var(--serif); font-size: 16px; color: var(--mute); margin: 4px 0 0; max-width: 52ch; }

/* work index — grouped by org/topic */
.workgroup { margin: clamp(30px, 5vw, 56px) 0 0; }
.workgroup-name {
  font-family: var(--mono); font-weight: 400; font-size: 11px;
  letter-spacing: .18em; text-transform: uppercase; color: var(--red);
  margin: 0; padding-bottom: 9px; border-bottom: 1.5px solid var(--ink);
}
.workgroup-blurb { font-family: var(--serif); font-size: 15px; color: var(--mute); margin: 11px 0 0; max-width: 58ch; }
.workgroup .projects { margin-top: 6px; }

/* work index — grid of site cards */
.workgrid {
  list-style: none; margin: clamp(14px, 2.5vw, 22px) 0 0; padding: 0;
  display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 258px), 1fr));
  gap: clamp(16px, 2.2vw, 24px);
}
.workcard-link {
  display: flex; flex-direction: column; height: 100%;
  text-decoration: none; color: var(--ink);
  border: 1px solid var(--hair); background: var(--code-bg);
}
.workcard-link:hover { border-color: var(--red); }
.workcard-thumb {
  display: block; aspect-ratio: 16 / 10; overflow: hidden;
  border-bottom: 1px solid var(--hair); background: var(--paper);
}
.workcard-thumb img { width: 100%; height: 100%; object-fit: cover; object-position: top left; display: block; }
.workcard-thumb--none { display: flex; align-items: center; justify-content: center; background: var(--code-bg); }
.workcard-thumb--none .sq { width: 14px; height: 14px; }
.workcard-body { display: block; padding: 13px 15px 15px; }
.workcard-name {
  display: block; font-family: var(--grot); font-weight: 700; font-size: 16px;
  letter-spacing: -.01em; color: var(--ink);
}
.workcard-link:hover .workcard-name { color: var(--red); }
.workcard-blurb { display: block; font-family: var(--serif); font-size: 14px; line-height: 1.4; color: var(--mute); margin: 5px 0 0; }

/* site detail page */
.backlink { color: var(--mute); text-decoration: none; }
.backlink:hover { color: var(--red); }
.lede {
  font-family: var(--serif); font-size: clamp(18px, 2.2vw, 22px);
  line-height: 1.5; color: var(--ink); max-width: 60ch;
  margin: clamp(16px, 3vw, 24px) 0 0;
}
.site-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: clamp(18px, 3vw, 26px) 0 0; }
.btn {
  font-family: var(--grot); font-weight: 700; font-size: 14px; letter-spacing: -.01em;
  text-decoration: none; color: var(--ink);
  border: 1.5px solid var(--ink); padding: 9px 16px;
  display: inline-flex; align-items: center; gap: 8px;
}
.btn:hover { color: var(--red); border-color: var(--red); }
.btn--primary { background: var(--red); color: #fff; border-color: var(--red); }
.btn--primary:hover { color: #fff; filter: brightness(1.08); }
.site-shot {
  display: block; margin: clamp(24px, 4vw, 40px) 0 0;
  border: 1px solid var(--hair); overflow: hidden;
}
.site-shot:hover { border-color: var(--red); }
.site-shot img { width: 100%; height: auto; display: block; }

/* =====================================================================
   POST
   ===================================================================== */
.post { padding: clamp(36px, 7vw, 72px) 0 0; }
.post .kicker { font-family: var(--mono); font-size: 11px; letter-spacing: .12em; text-transform: uppercase; color: var(--mute); margin: 0 0 12px; }
.post h1 {
  font-family: var(--grot); font-weight: 700;
  font-size: clamp(32px, 5.2vw, 52px); letter-spacing: -.03em; line-height: 1.0;
  margin: 0 0 10px; text-wrap: balance;
}
.post .byline { font-family: var(--mono); font-size: 12px; letter-spacing: .04em; color: var(--red); margin: 0 0 clamp(24px,4vw,38px); }
.post .byline .sep { color: var(--mute); }

.prose { max-width: var(--measure); }
.prose > * + * { margin-top: 1.05em; }
.prose p, .prose li { font-family: var(--serif); font-size: 18px; line-height: 1.62; }
.prose h2 { font-family: var(--grot); font-weight: 700; font-size: 24px; letter-spacing: -.02em; margin-top: 1.8em; }
.prose h3 { font-family: var(--grot); font-weight: 700; font-size: 18px; letter-spacing: -.01em; text-transform: uppercase; margin-top: 1.6em; }
.prose a { color: var(--ink); text-decoration: none; box-shadow: inset 0 -2px 0 var(--red); }
.prose a:hover { color: var(--red); }
.prose blockquote {
  margin: 1.4em 0; padding: 2px 0 2px 18px; border-left: 3px solid var(--red);
  font-style: italic; color: var(--mute);
}
.prose code { font-family: var(--mono); font-size: .82em; background: var(--code-bg); padding: .12em .4em; }
.prose pre {
  font-family: var(--mono); font-size: 13px; line-height: 1.55;
  background: var(--code-bg); border-left: 3px solid var(--red);
  padding: 14px 16px; overflow-x: auto;
}
.prose pre code { background: none; padding: 0; font-size: inherit; }
.prose ul, .prose ol { padding-left: 1.2em; }
.prose hr { border: 0; border-top: 1px solid var(--hair); margin: 2.2em 0; }
.prose img { border: 1px solid var(--hair); }

.fin { display: inline-block; width: 12px; height: 12px; background: var(--red); margin-top: 1.4em; }

.postnav { margin-top: clamp(40px, 7vw, 72px); padding-top: 18px; border-top: 1px solid var(--hair); }
.postnav a { font-family: var(--grot); font-weight: 700; font-size: 12px; letter-spacing: .12em; text-transform: uppercase; text-decoration: none; color: var(--ink); display: inline-flex; align-items: center; gap: 9px; }
.postnav a:hover { color: var(--red); }

/* =====================================================================
   404
   ===================================================================== */
.notfound { padding: clamp(60px, 14vw, 160px) 0; }
.notfound .code { font-family: var(--grot); font-weight: 700; font-size: clamp(80px, 20vw, 220px); letter-spacing: -.05em; line-height: .8; margin: 0; }
.notfound .msg { font-family: var(--serif); font-size: 20px; margin: 16px 0 0; }
.notfound .msg a { color: var(--red); text-decoration: none; box-shadow: inset 0 -2px 0 var(--red); }

@media (prefers-reduced-motion: no-preference) {
  .nav a, .toggle, .linklist a, .archive .t, .projects .pname { transition: color .12s ease, border-color .12s ease; }
}