/* ============================================================
   zaynesember.com — site styles
   Direction B: dark charcoal sidebar index
   Roboto body · Roboto Mono accents · soft violet
   ============================================================ */

:root {
  --bg: oklch(12% 0.012 295);
  --bg-rail: oklch(9.5% 0.012 295);
  --bg-raised: oklch(16% 0.014 295);
  --line: oklch(25% 0.014 295);
  --text: oklch(93% 0.005 295);
  --muted: oklch(67% 0.012 295);
  --accent: #a78bfa;
  --r: 10px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Roboto', sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
p { margin: 0; }
p + p { margin-top: 18px; }

::selection { background: color-mix(in oklab, var(--accent) 35%, transparent); }

/* ---------- inline text links ---------- */
.tlink {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: color-mix(in oklab, var(--accent) 40%, transparent);
  text-underline-offset: 3px;
  transition: text-decoration-color .15s;
}
.tlink:hover { text-decoration-color: var(--accent); }

/* ---------- shell ---------- */
.shell {
  display: grid;
  grid-template-columns: 300px 1fr;
  min-height: 100vh;
}

/* ---------- rail ---------- */
.rail {
  border-right: 1px solid var(--line);
  background: var(--bg-rail);
  padding: 48px 36px;
  display: flex;
  flex-direction: column;
  gap: 48px;
  position: sticky;
  top: 0;
  height: 100vh;
}
.rail-name {
  display: block;
  font-weight: 300;
  font-size: 30px;
  line-height: 1.15;
  color: var(--text);
}
.rail-name span { display: block; }
.rail-tag {
  margin-top: 14px;
  font-family: 'Roboto Mono', monospace;
  font-size: 12px;
  line-height: 1.7;
  color: var(--muted);
  letter-spacing: .03em;
}
.rail-nav { display: flex; flex-direction: column; gap: 4px; }
/* 00: the easter egg — invisible until you hover the nav */
.rail-nav a.secret { opacity: 0; transition: opacity .35s, background .15s, color .15s; }
.rail-nav:hover a.secret, .rail-nav a.secret:focus-visible { opacity: .55; }
.rail-nav a.secret:hover, .rail-nav a.secret.active { opacity: 1; }
/* no hover available (touch) — leave it faintly visible instead */
@media (hover: none) {
  .rail-nav a.secret { opacity: .3; }
}
.rail-nav a {
  display: flex;
  gap: 14px;
  align-items: baseline;
  font-family: 'Roboto Mono', monospace;
  font-size: 14px;
  letter-spacing: .04em;
  color: var(--muted);
  padding: 9px 12px;
  border-radius: calc(var(--r) * .7);
  transition: background .15s, color .15s;
}
.rail-nav a .n { font-size: 11px; color: var(--accent); }
.rail-nav a:hover { background: color-mix(in oklab, var(--bg-raised) 70%, transparent); color: var(--text); }
.rail-nav a.active { background: var(--bg-raised); color: var(--text); }
.rail-nav a.dim { opacity: .55; }
.rail-nav a.dim:hover, .rail-nav a.dim.active { opacity: 1; }
.rail-foot { margin-top: auto; display: flex; flex-direction: column; gap: 8px; }
.rail-foot a {
  font-family: 'Roboto Mono', monospace;
  font-size: 12px;
  color: var(--muted);
  letter-spacing: .04em;
  width: fit-content;
}
.rail-foot a:hover { color: var(--accent); }
.rail-copy {
  font-family: 'Roboto Mono', monospace;
  font-size: 11px;
  color: color-mix(in oklab, var(--muted) 60%, transparent);
  letter-spacing: .04em;
  margin-top: 14px;
}

/* ---------- main ---------- */
.main { padding: 64px 72px; max-width: 1120px; }

.sec-label {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: 'Roboto Mono', monospace;
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent);
}
.sec-label::after { content: ''; height: 1px; flex: 1; background: var(--line); }

.page-head { margin-bottom: 44px; }
.page-head h1 { margin: 14px 0 0; font-weight: 300; font-size: 40px; line-height: 1.2; }
.page-head .sub { margin-top: 8px; color: var(--muted); max-width: 560px; }

/* ---------- about ---------- */
.about-hero {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 64px;
  align-items: start;
  margin-top: 34px;
}
.bio { color: color-mix(in oklab, var(--text) 88%, var(--muted)); max-width: 640px; }

.now-card {
  margin-top: 44px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--bg-raised);
  padding: 22px 26px;
  display: flex;
  gap: 22px;
  align-items: baseline;
  max-width: 640px;
}
.now-card .k {
  font-family: 'Roboto Mono', monospace;
  font-size: 11.5px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent);
  white-space: nowrap;
  min-width: 88px;
}
.now-card .v { font-size: 15.5px; color: var(--text); }
.now-card .rows { display: flex; flex-direction: column; gap: 12px; flex: 1; }
.now-card .row-item {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: baseline;
  gap: 4px 18px;
}
.now-card .d {
  font-family: 'Roboto Mono', monospace;
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--muted);
  white-space: nowrap;
}
.now-card + .now-card { margin-top: 12px; }
.past-card { background: transparent; }
.past-card .k { color: var(--muted); }
.past-card .v { color: color-mix(in oklab, var(--text) 75%, var(--muted)); }

.headshot-col { display: flex; flex-direction: column; gap: 20px; }
.headshot {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--r);
  filter: saturate(.92);
}
.headshot-caption {
  margin-top: 10px;
  font-family: 'Roboto Mono', monospace;
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--muted);
}

/* ---------- list rows (projects / research / blog) ---------- */
.row-list { display: flex; flex-direction: column; }
.row {
  display: grid;
  grid-template-columns: 130px 1fr 240px;
  gap: 36px;
  padding: 30px 0;
  border-top: 1px solid var(--line);
  align-items: start;
}
.row:last-child { border-bottom: 1px solid var(--line); }
.row .tag {
  font-family: 'Roboto Mono', monospace;
  font-size: 11.5px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--accent);
  padding-top: 5px;
}
.row h2 { margin: 0 0 8px; font-weight: 500; font-size: 20px; line-height: 1.4; }
.row h2 a:hover { color: var(--accent); }
.row .desc {
  color: color-mix(in oklab, var(--text) 80%, var(--muted));
  font-size: 15.5px;
  max-width: 560px;
}
.row .links, .paper .links { display: flex; gap: 16px; margin-top: 12px; flex-wrap: wrap; }
.paper .links { margin-top: 20px; }
.row .links a, .paper .links a {
  font-family: 'Roboto Mono', monospace;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
  padding-bottom: 1px;
  transition: color .15s, border-color .15s;
}
.row .links a:hover, .paper .links a:hover { color: var(--accent); border-bottom-color: var(--accent); }

.thumb {
  display: block;
  width: 100%;
  border-radius: calc(var(--r) * .8);
  border: 1px solid var(--line);
  overflow: hidden;
  background: var(--bg-raised);
}
.thumb img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  object-position: top left;
}
a.thumb { transition: border-color .15s; }
a.thumb:hover { border-color: var(--accent); }

/* meta line for blog rows */
.row .meta {
  font-family: 'Roboto Mono', monospace;
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--muted);
  margin-bottom: 6px;
}

/* ---------- research ---------- */
.paper { padding: 36px 0; border-top: 1px solid var(--line); }
.paper:last-child { border-bottom: 1px solid var(--line); }
.paper .tag {
  font-family: 'Roboto Mono', monospace;
  font-size: 11.5px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--accent);
}
.paper h2 { margin: 10px 0 4px; font-weight: 500; font-size: 22px; line-height: 1.4; max-width: 760px; }
.paper .byline { font-family: 'Roboto Mono', monospace; font-size: 12.5px; color: var(--muted); letter-spacing: .04em; }
.paper .abstract {
  margin-top: 18px;
  color: color-mix(in oklab, var(--text) 80%, var(--muted));
  font-size: 15.5px;
  max-width: 720px;
}
.paper .figs {
  margin-top: 26px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  max-width: 760px;
}
.paper .figs .thumb img { aspect-ratio: auto; object-fit: contain; background: white; }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .shell { grid-template-columns: 1fr; }
  .rail {
    position: static;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--line);
    padding: 32px 24px;
    gap: 28px;
  }
  .rail-nav { flex-direction: row; flex-wrap: wrap; }
  .rail-foot { margin-top: 0; flex-direction: row; flex-wrap: wrap; gap: 16px; }
  .rail-copy { display: none; }
  .main { padding: 40px 24px; }
  .about-hero { grid-template-columns: 1fr; gap: 36px; }
  .headshot-col { max-width: 320px; }
  .row { grid-template-columns: 1fr; gap: 16px; }
  .row .tag { padding-top: 0; }
  .row .thumb, .row a.thumb { max-width: 360px; }
  .paper .figs { grid-template-columns: 1fr; }
}