/* ==========================================================================
   Critical Code Studies — umbrella site
   Shares the "workbench charcoal" family language of the reading sites
   (SHRDLU, Spacewar!, ELIZA) but takes amber as its own accent: the colour
   of the critic's pen, the annotation laid over the machine's green voice.
   ========================================================================== */

:root {
  --bg:        #11131a;          /* workbench charcoal */
  --bg-2:      #171a23;
  --panel:     rgba(231, 228, 218, 0.035);
  --panel-2:   rgba(231, 228, 218, 0.055);
  --line:      rgba(231, 228, 218, 0.18);
  --line-soft: rgba(231, 228, 218, 0.10);
  --ink:       #e7e4da;          /* body text, warm white */
  --ink-dim:   #989b93;
  --bright:    #faf8f2;          /* headings */

  /* the readings' machine voices, used as small family signals */
  --green:     #6fdc8c;          /* SHRDLU / symbolic AI */
  --vector:    #5ad1c4;          /* Spacewar! / the vector tube */
  --eliza:     #c79be0;          /* ELIZA / the talking cure */

  /* the umbrella accent: amber, the annotation / marginalia ink */
  --amber:     #f2ab3c;
  --beam:      #f2ab3c;          /* default link / accent */
  --beam-deep: #d98e20;
  --mark:      rgba(242, 171, 60, 0.16);   /* highlight wash */
  --glow:      0 0 6px rgba(242, 171, 60, 0.45), 0 0 14px rgba(242, 171, 60, 0.2);
  --glow-soft: 0 0 5px rgba(250, 248, 242, 0.25);

  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Code", Menlo, Consolas, monospace;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --wrap: 960px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    linear-gradient(rgba(231,228,218,0.022) 1px, transparent 1px) 0 0 / 100% 2.4rem,
    radial-gradient(ellipse 120% 80% at 50% -10%, var(--bg-2) 0%, var(--bg) 62%) fixed;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.66;
  letter-spacing: 0.1px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

body::after {
  content: "";
  position: fixed; inset: 0; pointer-events: none; z-index: 9000;
  background: radial-gradient(ellipse 92% 78% at 50% 42%, transparent 58%, rgba(0,0,0,0.5) 100%);
}

.wrap { width: min(var(--wrap), 92vw); margin: 0 auto; }
section[id], [id]:target { scroll-margin-top: 92px; }

/* ---------- links ---------- */
a { color: var(--beam); text-decoration: none; }
a:hover { color: var(--bright); text-shadow: var(--glow); }
.content a { border-bottom: 1px solid var(--line); }
.content a:hover { border-bottom-color: var(--beam); }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 8000;
  backdrop-filter: blur(3px);
  background: linear-gradient(to bottom, rgba(17,19,26,0.94), rgba(17,19,26,0.62));
  border-bottom: 1px solid var(--line-soft);
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 0; gap: 1rem; position: relative;
}
.brand { display: flex; align-items: center; gap: 0.7rem; border: 0 !important; }
.brand svg { width: 30px; height: 30px; }
.brand .brand-mark { filter: drop-shadow(0 0 3px rgba(242,171,60,0.5)); }
.brand-block { display: flex; flex-direction: column; align-items: flex-start; gap: 0.28rem; line-height: 1.05; }
.brand-name { font-family: var(--mono); font-weight: 700; font-size: 0.92rem; letter-spacing: 0.5px; color: var(--bright); }
.brand-name .slash { color: var(--beam); }
.brand-tagline { font-family: var(--mono); font-size: 0.6rem; letter-spacing: 1px; color: var(--ink-dim); text-transform: uppercase; }

.nav-toggle {
  display: inline-flex; align-items: center; gap: 0.5rem;
  background: none; border: 1px solid var(--line); color: var(--beam);
  font-family: var(--mono); font-size: 0.7rem; letter-spacing: 1.5px; text-transform: uppercase;
  padding: 7px 13px; border-radius: 3px; cursor: pointer;
}
.nav-toggle:hover { border-color: var(--beam); color: var(--bright); text-shadow: var(--glow); }
.nav-toggle .bars { font-size: 0.95rem; line-height: 1; }

/* ---------- nav ---------- */
.site-nav {
  position: absolute; top: calc(100% + 7px); right: 0;
  display: none; flex-direction: column;
  min-width: 240px; max-width: min(320px, 90vw); padding: 0.4rem 0;
  background: rgba(20,23,31,0.985); border: 1px solid var(--line); border-radius: 4px;
  box-shadow: 0 12px 32px rgba(0,0,0,0.6);
  font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.8px; text-transform: uppercase;
}
.site-nav.open { display: flex; }
.nav-group { position: static; display: flex; flex-direction: column; }
.nav-top {
  background: none; border: 0; cursor: pointer; text-align: left;
  font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.8px; text-transform: uppercase;
  color: var(--ink-dim); padding: 0.6rem 1.2rem; text-decoration: none;
  display: flex; align-items: center; justify-content: space-between; gap: 0.4rem; width: 100%;
}
.nav-top:hover, .nav-top:focus-visible { color: var(--beam); text-shadow: var(--glow); background: rgba(242,171,60,0.08); outline: none; }
.nav-direct { border-top: 1px solid var(--line-soft); }
.nav-top .caret { font-size: 0.7em; opacity: 0.7; transition: transform 0.15s ease; }
.nav-top[aria-expanded="true"] .caret { transform: rotate(180deg); }
.nav-menu { display: none; flex-direction: column; background: rgba(242,171,60,0.045); }
.nav-menu.open { display: flex; }
.nav-menu a { color: var(--ink-dim); border: 0; padding: 0.5rem 1.2rem 0.5rem 2rem; text-decoration: none; }
.nav-menu a:hover { color: var(--beam); text-shadow: var(--glow); background: rgba(242,171,60,0.08); }

@media (min-width: 880px) {
  .nav-toggle { display: none; }
  .site-nav {
    position: static; display: flex; flex-direction: row; align-items: center;
    min-width: 0; max-width: none; padding: 0; background: none; border: 0; box-shadow: none;
    gap: 0.2rem;
  }
  .nav-group { position: relative; }
  .nav-top { padding: 0.5rem 0.85rem; width: auto; white-space: nowrap; }
  .nav-direct { border-top: 0; }
  .nav-menu {
    position: absolute; top: calc(100% + 6px); right: 0; min-width: 210px;
    background: rgba(20,23,31,0.99); border: 1px solid var(--line); border-radius: 4px;
    box-shadow: 0 12px 30px rgba(0,0,0,0.6); padding: 0.3rem 0;
  }
  .nav-menu a { padding: 0.5rem 1.1rem; }
}

/* ---------- hero ---------- */
.hero { position: relative; background: #0a0c11; overflow: hidden; border-bottom: 1px solid var(--line-soft); }
.hero-code {
  position: absolute; inset: 0; z-index: 0; overflow: hidden; pointer-events: none;
  -webkit-mask-image: linear-gradient(115deg, #000 0, #000 42%, transparent 78%);
          mask-image: linear-gradient(115deg, #000 0, #000 42%, transparent 78%);
}
.hero-code-inner {
  margin: 0; padding: 1.4rem 2rem; font-family: var(--mono);
  font-size: 15px; line-height: 1.7; color: rgba(242,171,60,0.055); white-space: pre;
  animation: code-scroll 900s linear infinite;
}
@keyframes code-scroll { from { transform: translateY(0); } to { transform: translateY(-50%); } }
@media (prefers-reduced-motion: reduce) { .hero-code-inner { animation: none; } }

.hero-inner { position: relative; z-index: 2; padding: clamp(3.5rem, 11vh, 7rem) 0 clamp(3rem, 9vh, 6rem); }
.hero .kicker {
  display: inline-block; font-family: var(--mono); font-size: 0.66rem; letter-spacing: 3px;
  text-transform: uppercase; color: var(--beam); margin-bottom: 1.1rem;
}
.hero h1 {
  margin: 0; font-family: var(--mono); font-weight: 700;
  font-size: clamp(2.1rem, 6.2vw, 4rem); line-height: 1.04; letter-spacing: -0.5px; color: var(--bright);
}
.hero h1 .slash { color: var(--beam); text-shadow: var(--glow); }
.hero .tagline {
  margin: 1.3rem 0 0; max-width: 30em; font-size: clamp(1.05rem, 2.4vw, 1.3rem);
  color: var(--ink); line-height: 1.55;
}
.hero .tagline em { color: var(--bright); font-style: italic; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.8rem; margin-top: 2rem; }

.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: var(--mono); font-size: 0.74rem; letter-spacing: 1.5px; text-transform: uppercase;
  padding: 0.8rem 1.3rem; border-radius: 4px; border: 1px solid var(--line);
  color: var(--ink); background: var(--panel); cursor: pointer; transition: all 0.18s ease;
}
.btn:hover { border-color: var(--beam); color: var(--bright); text-shadow: var(--glow); background: rgba(242,171,60,0.07); }
.btn-primary { border-color: var(--beam); color: var(--bright); }
.btn-primary:hover { background: rgba(242,171,60,0.13); box-shadow: var(--glow); }

/* ---------- annotated-code motif ---------- */
.codecard {
  position: relative; margin-top: 2.6rem; max-width: 640px;
  font-family: var(--mono); font-size: 0.82rem; line-height: 1.9;
  background: rgba(5,6,10,0.7); border: 1px solid var(--line);
  border-radius: 6px; padding: 1.1rem 1.3rem;
  box-shadow: inset 0 0 30px rgba(0,0,0,0.55), 0 8px 26px rgba(0,0,0,0.4);
}
.codecard .cc-bar { display: flex; gap: 0.4rem; margin-bottom: 0.9rem; }
.codecard .cc-bar i { width: 9px; height: 9px; border-radius: 50%; background: var(--line); display: inline-block; }
.codecard pre { margin: 0; white-space: pre-wrap; color: var(--ink-dim); }
.codecard .mark { background: var(--mark); color: var(--bright); border-bottom: 1px solid var(--beam); padding: 0 2px; }
.codecard .note {
  display: block; margin: 0.15rem 0 0.6rem 0; padding-left: 1.3rem;
  font-family: var(--serif); font-style: italic; font-size: 0.92rem; line-height: 1.5;
  color: var(--amber); position: relative;
}
.codecard .note::before { content: "→"; position: absolute; left: 0; color: var(--beam); font-style: normal; }

/* syntax tokens for the real source snippet */
.codecard .src { font-size: 1.02rem; line-height: 1.7; letter-spacing: 0.3px; color: var(--ink); }
.tok-ln  { color: var(--ink-dim); }                    /* line number */
.tok-kw  { color: var(--green); font-weight: 700; }    /* BASIC keyword */
.tok-fn  { color: var(--vector); }                     /* built-in function */
.tok-num { color: var(--amber); }                      /* numeric literal */
.tok-op  { color: var(--ink-dim); }                    /* operators, punctuation */
.tok-com { color: var(--ink-dim); font-style: italic; }/* comment */
.codecard figcaption {
  margin: 0.9rem 0 0; font-family: var(--serif); font-size: 0.9rem; line-height: 1.5;
  color: var(--ink-dim); border-top: 1px solid var(--line-soft); padding-top: 0.7rem;
}
.codecard figcaption strong { color: var(--ink); font-weight: 600; }
.tok-str { color: var(--eliza); }                      /* string literal ($...$) */
.tok-lbl { color: var(--green); }                      /* assembly label */

/* ---------- code deck: slide across the readings' source ---------- */
.codedeck {
  position: relative; margin-top: 2.6rem; max-width: 640px;
  background: rgba(5,6,10,0.7); border: 1px solid var(--line);
  border-radius: 6px; padding: 0.95rem 0 0;
  box-shadow: inset 0 0 30px rgba(0,0,0,0.55), 0 8px 26px rgba(0,0,0,0.4);
}
.codedeck .cc-bar { display: flex; align-items: center; gap: 0.7rem; margin: 0 1.3rem 0.9rem; }
.cd-tabs { display: flex; gap: 0.35rem; margin-left: auto; flex-wrap: wrap; }
.cd-tab {
  font-family: var(--mono); font-size: 0.58rem; letter-spacing: 1px; text-transform: uppercase;
  color: var(--ink-dim); background: transparent; border: 1px solid var(--line-soft);
  border-radius: 3px; padding: 0.28rem 0.55rem; cursor: pointer; transition: all 0.18s ease;
}
.cd-tab:hover { color: var(--ink); border-color: var(--line); }
.cd-tab.is-on { color: var(--beam); border-color: var(--beam); }
.codedeck-view { overflow: hidden; cursor: pointer; }
.codedeck-track { white-space: nowrap; font-size: 0; transition: transform 0.5s cubic-bezier(0.5, 0, 0.2, 1); }
@media (prefers-reduced-motion: reduce) { .codedeck-track { transition: none; } }
.codeslide { display: inline-block; width: 100%; margin: 0; vertical-align: top; white-space: normal; font-size: 1rem; padding: 0 1.3rem 1.2rem; }
.codeslide pre.src { margin: 0; white-space: pre; overflow-x: auto; font-size: 0.86rem; line-height: 1.7; color: var(--ink); }
.codeslide figcaption {
  margin: 0.85rem 0 0; font-family: var(--serif); font-size: 0.88rem; line-height: 1.5;
  color: var(--ink-dim); border-top: 1px solid var(--line-soft); padding-top: 0.7rem;
}
.codeslide figcaption strong { color: var(--ink); font-weight: 600; }
.codeslide figcaption .prov { display: block; margin-top: 0.3rem; font-family: var(--mono); font-size: 0.6rem; letter-spacing: 0.5px; text-transform: uppercase; color: var(--ink-dim); }

/* ---------- sections ---------- */
main { padding: clamp(3rem, 8vh, 5rem) 0; }
.section { margin-bottom: clamp(3rem, 8vh, 5rem); }
.section:last-child { margin-bottom: 0; }
.kicker { display: block; font-family: var(--mono); font-size: 0.66rem; letter-spacing: 2.5px; text-transform: uppercase; color: var(--beam); margin-bottom: 0.7rem; }
h2 { font-family: var(--serif); font-weight: 600; font-size: clamp(1.6rem, 4vw, 2.3rem); line-height: 1.15; color: var(--bright); margin: 0 0 1rem; }
h3 { font-family: var(--serif); font-size: 1.25rem; color: var(--bright); margin: 0 0 0.5rem; }
.content p { margin: 0 0 1.1rem; max-width: 40em; }
.lede p { font-size: 1.18rem; color: var(--ink); max-width: 38em; }
.muted { color: var(--ink-dim); }
.divider { border: 0; border-top: 1px solid var(--line-soft); margin: clamp(2.5rem,6vh,4rem) 0; }

/* ---------- readings grid ---------- */
.readings { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1.2rem; margin-top: 1.8rem; }
.reading {
  position: relative; display: flex; flex-direction: column; gap: 0.7rem;
  padding: 1.5rem 1.4rem 1.4rem; border: 1px solid var(--line); border-radius: 8px;
  background: var(--panel); text-decoration: none; color: var(--ink);
  transition: border-color 0.2s ease, transform 0.2s ease, background 0.2s ease; overflow: hidden;
}
.reading::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: var(--accent, var(--beam));
  opacity: 0.85;
}
.reading:hover { border-color: var(--accent, var(--beam)); transform: translateY(-3px); background: var(--panel-2); }
.reading .r-year { font-family: var(--mono); font-size: 0.62rem; letter-spacing: 2px; color: var(--ink-dim); text-transform: uppercase; }
.reading .r-title { font-family: var(--mono); font-weight: 700; font-size: 1.3rem; letter-spacing: 0.5px; color: var(--accent, var(--bright)); }
.reading .r-desc { font-size: 0.95rem; color: var(--ink-dim); line-height: 1.55; margin: 0; flex: 1; }
.reading .r-status {
  font-family: var(--mono); font-size: 0.6rem; letter-spacing: 1.5px; text-transform: uppercase;
  color: var(--ink-dim); display: inline-flex; align-items: center; gap: 0.45rem;
}
.reading .r-status .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--ink-dim); }
.reading.live .r-status { color: var(--accent); }
.reading.live .r-status .dot { background: var(--accent); box-shadow: 0 0 7px var(--accent); }

.reading[aria-disabled="true"] { cursor: default; }
.reading[aria-disabled="true"]:hover { transform: none; }

/* ---------- method list ---------- */
.method { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1.3rem 2rem; margin-top: 1.6rem; }
.method .m { margin: 0; }
.method .m .n { font-family: var(--mono); font-size: 0.7rem; letter-spacing: 1px; color: var(--beam); }
.method .m h3 { font-size: 1.1rem; margin: 0.4rem 0 0.4rem; }
.method .m p { font-size: 0.95rem; color: var(--ink-dim); margin: 0; line-height: 1.6; }

/* ---------- pull quote ---------- */
.pull {
  border-left: 2px solid var(--beam); padding: 0.4rem 0 0.4rem 1.4rem; margin: 2rem 0;
  font-family: var(--serif); font-style: italic; font-size: 1.2rem; color: var(--bright); max-width: 34em;
}
.pull cite { display: block; margin-top: 0.7rem; font-style: normal; font-family: var(--mono); font-size: 0.7rem; letter-spacing: 1px; color: var(--ink-dim); text-transform: uppercase; }

/* ---------- team ---------- */
.team { display: flex; flex-direction: column; gap: 1.5rem; margin-top: 1.8rem; }
.member { display: flex; align-items: center; gap: 1.3rem; margin: 0; }
.member .portrait {
  position: relative; width: 84px; height: 84px; flex: 0 0 auto; margin: 0;
  border-radius: 50%; overflow: hidden; border: 1px solid var(--line);
  background: var(--panel); box-shadow: inset 0 0 18px rgba(0,0,0,0.45);
  transition: border-color .2s ease, box-shadow .2s ease;
}
.member:hover .portrait { border-color: var(--beam); box-shadow: var(--glow); }
.member .portrait img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; filter: grayscale(0.3) contrast(1.03); }
.member .portrait .initials { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; font-family: var(--mono); font-size: 1.3rem; letter-spacing: 1px; color: var(--ink-dim); }
.member .body { min-width: 0; }
.member h3 { margin: 0 0 0.35rem; font-size: 1.1rem; }
.member .meta { font-size: 0.86rem; color: var(--ink-dim); margin: 0; line-height: 1.6; }
.member .meta .role { font-family: var(--mono); font-size: 0.6rem; letter-spacing: 1.5px; text-transform: uppercase; color: var(--beam); }
.member .meta .sep { color: var(--line); margin: 0 0.55rem; }

/* ---------- working-group threads ---------- */
.wg { margin-top: 1.6rem; padding: 1.6rem 1.6rem 1.4rem; border: 1px solid var(--line); border-radius: 10px; background: var(--panel); }
.wg-head { display: flex; align-items: baseline; gap: 0.7rem 1rem; flex-wrap: wrap; margin-bottom: 0.3rem; }
.wg-head .live-tag { font-family: var(--mono); font-size: 0.58rem; letter-spacing: 1.5px; text-transform: uppercase; color: var(--beam); border: 1px solid var(--beam); border-radius: 3px; padding: 0.15rem 0.45rem; display: inline-flex; align-items: center; gap: 0.4rem; }
.wg-head .live-tag .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--beam); box-shadow: 0 0 7px var(--beam); animation: wg-pulse 2.2s ease-in-out infinite; }
@keyframes wg-pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.35; } }
@media (prefers-reduced-motion: reduce) { .wg-head .live-tag .dot { animation: none; } }
.threads { list-style: none; padding: 0; margin: 1.2rem 0 0; }
.threads li { border-top: 1px solid var(--line-soft); }
.threads li:first-child { border-top: 0; }
.threads a { display: block; padding: 0.85rem 0; border: 0; }
.threads a:hover { text-shadow: none; }
.threads a:hover .t-title { color: var(--bright); text-shadow: var(--glow); }
.threads .t-title { display: block; font-family: var(--serif); font-size: 1.06rem; color: var(--ink); line-height: 1.4; }
.threads .t-meta { display: block; margin-top: 0.2rem; font-family: var(--mono); font-size: 0.64rem; letter-spacing: 1px; text-transform: uppercase; color: var(--ink-dim); }
.threads .t-meta .who { color: var(--beam); }

/* ---------- bibliography ---------- */
.bib { list-style: none; padding: 0; margin: 1.6rem 0 0; }
.bib li { padding: 0.85rem 0; border-top: 1px solid var(--line-soft); font-size: 0.98rem; line-height: 1.55; }
.bib li:first-child { border-top: 0; }
.bib .b-meta { font-family: var(--mono); font-size: 0.65rem; letter-spacing: 1px; text-transform: uppercase; color: var(--ink-dim); display: block; margin-top: 0.25rem; }

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--line-soft); margin-top: clamp(3rem,8vh,5rem); padding: 2.4rem 0; }
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 1rem 2rem; align-items: baseline; justify-content: space-between; }
.site-footer .micro { font-size: 0.82rem; color: var(--ink-dim); margin: 0; max-width: 46em; line-height: 1.6; }
.site-footer a { color: var(--beam); }
.footer-nav { font-family: var(--mono); font-size: 0.68rem; letter-spacing: 1px; text-transform: uppercase; display: flex; gap: 1.1rem; flex-wrap: wrap; }
.footer-nav a { color: var(--ink-dim); }
.footer-nav a:hover { color: var(--beam); }

/* ---------- misc ---------- */
.kicker-tag { font-family: var(--mono); font-size: 0.6rem; letter-spacing: 1.5px; text-transform: uppercase; color: var(--ink-dim); border: 1px solid var(--line); border-radius: 3px; padding: 0.2rem 0.5rem; }
.lede .kicker { color: var(--beam); }