/* ─────────────────────────────────────────────────────────────
   Solomon B. Pobee — research portfolio
   Plain CSS, no build step. Single dark theme by design.
   ───────────────────────────────────────────────────────────── */

:root{
  --bg:#07100e;
  --bg-soft:#0c1513;
  --surface:rgba(255,255,255,.025);
  --surface-strong:rgba(255,255,255,.055);
  --text:#f5f3ed;
  --muted:#aaa9a3;
  --dim:#c4c3bd;
  --border:rgba(245,243,237,.16);
  --border-soft:rgba(245,243,237,.09);
  --accent:#8bff43;
  --accent-ink:#081007;
  --max:1200px;
  --sans:"DM Sans",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --serif:"Instrument Serif",Georgia,"Times New Roman",serif;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Consolas,monospace;
  color-scheme:dark;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto;}}

body{
  margin:0;
  background:
    radial-gradient(circle at 82% 8%, rgba(139,255,67,.045), transparent 22rem),
    linear-gradient(rgba(255,255,255,.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.018) 1px, transparent 1px),
    var(--bg);
  background-size:auto, 56px 56px, 56px 56px, auto;
  color:var(--text);
  font-family:var(--sans);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
body.menu-open{overflow:hidden;}
a{color:inherit;text-decoration:none;}
img{display:block;max-width:100%;}
button,a{-webkit-tap-highlight-color:transparent;}
button{font-family:inherit;}
[hidden]{display:none !important;}

/* overflow-x:clip, not hidden — `hidden` makes this a scroll container and
   the sticky header would stop sticking to the viewport. */
.shell{min-height:100vh;overflow-x:clip;}
.site-header,.pad,.site-footer{width:min(calc(100% - 48px),var(--max));margin-inline:auto;}

.skip{
  position:absolute;left:-9999px;top:0;z-index:90;
  background:var(--accent);color:var(--accent-ink);
  padding:10px 16px;border-radius:0 0 8px 0;font-size:.9375rem;font-weight:700;
}
.skip:focus{left:0;}

/* ═══════════ header ═══════════ */
.site-header{
  position:sticky;top:0;z-index:50;
  min-height:92px;
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
  border-bottom:1px solid var(--border-soft);
  background:rgba(7,16,14,.86);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  padding-top:env(safe-area-inset-top,0px);
}
.brand{display:inline-flex;align-items:center;gap:13px;}
.brand-text{display:flex;flex-direction:column;line-height:1.2;min-width:0;}
.brand-text strong{
  font-size:1.02rem;font-weight:700;letter-spacing:-.025em;color:var(--text);
  white-space:nowrap;transition:color 180ms ease;
}
.brand-text em{
  font-style:normal;font-size:.875rem;font-weight:500;color:var(--muted);
  margin-top:3px;letter-spacing:.01em;white-space:nowrap;
}
.brand:hover .brand-text strong,
.brand:focus-visible .brand-text strong{color:var(--accent);}
.logo-mark{
  width:44px;height:44px;display:block;border-radius:12px;
  transition:transform 200ms ease,box-shadow 200ms ease;
}
.brand:hover .logo-mark,.brand:focus-visible .logo-mark{
  transform:translateY(-1px);
  box-shadow:0 6px 20px rgba(56,189,248,.28);
}
.logo-mark-sm{width:34px;height:34px;border-radius:9px;}

.site-nav{display:flex;gap:34px;align-items:center;}
.site-nav a{
  position:relative;color:var(--muted);font-size:.9688rem;
  transition:color 180ms ease;padding-block:4px;
}
.site-nav a:hover,.site-nav a:focus-visible{color:var(--text);}
.site-nav a[aria-current="page"]{color:var(--text);}
.site-nav a[aria-current="page"]::after{
  content:"";position:absolute;left:0;right:0;bottom:-13px;height:2px;background:var(--accent);
}

.header-note{
  justify-self:end;margin:0;
  display:flex;align-items:flex-start;gap:12px;
  color:#d6d4ce;font-family:var(--serif);font-size:.98rem;line-height:1.1;font-style:italic;
}
.status-dot{
  width:8px;height:8px;margin-top:4px;flex:0 0 auto;border-radius:999px;
  background:var(--accent);box-shadow:0 0 18px rgba(139,255,67,.7);
}
@media (prefers-reduced-motion:no-preference){
  .status-dot{animation:pulse 2.6s ease-in-out infinite;}
  @keyframes pulse{0%,100%{opacity:1;transform:scale(1);}50%{opacity:.5;transform:scale(.86);}}
}

.menu-toggle{display:none;}
/* the mobile menu is hidden at every width; the media query below reveals it
   only when body.menu-open is set on a narrow viewport */
.drawer{display:none;}
.scrim{
  position:fixed;inset:0;z-index:40;background:rgba(3,8,7,.6);
  -webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);
}

/* ═══════════ shared type ═══════════ */
.eyebrow,.kicker{
  margin:0;color:#babbb4;font-size:.875rem;letter-spacing:.30em;font-weight:600;
  text-transform:uppercase;
}
.eyebrow span{margin:0 10px;color:#676d67;}
.accent-line{display:block;width:34px;height:2px;background:var(--accent);}

.pad{padding-block:64px;}

/* The opening block of an interior page: more room above the eyebrow and a
   real gap between the title and its lead, so the head can breathe. */
main > .pad:first-child:not(.hero){padding-block:92px 52px;}
main > .pad:first-child:not(.hero) h1{margin-bottom:26px;}
main > .pad:first-child:not(.hero) .eyebrow{margin-bottom:6px;}
@media (max-width:640px){
  main > .pad:first-child:not(.hero){padding-block:56px 36px;}
  main > .pad:first-child:not(.hero) h1{margin-bottom:20px;}
}

h1{margin:14px 0 10px;font-size:clamp(3rem,7vw,6rem);line-height:.96;letter-spacing:-.065em;}
h2{margin:0;font-size:1.5rem;letter-spacing:-.03em;}
h3{margin:0;font-size:1.2rem;letter-spacing:-.02em;}
p{margin:0 0 16px;}
p:last-child{margin-bottom:0;}
.lead{
  max-width:820px;margin:0;color:#cbc9c2;font-family:var(--serif);
  font-size:clamp(1.65rem,3vw,2.55rem);line-height:1.22;
}
.body-copy p{color:var(--dim);font-size:1.03rem;line-height:1.75;max-width:62ch;}
.body-copy strong{color:var(--text);}

/* ═══════════ home hero ═══════════ */
.hero{
  position:relative;padding-top:66px;padding-bottom:62px;
  display:grid;grid-template-columns:minmax(0,1.12fr) minmax(320px,.88fr);
  gap:62px;align-items:center;
}
.hero::after{
  content:"";position:absolute;width:560px;height:560px;right:110px;top:10px;
  border:1px solid rgba(139,255,67,.07);border-radius:50%;pointer-events:none;
}
.hero-copy{position:relative;z-index:1;}
.hero-statement{
  margin:0;max-width:780px;font-family:var(--serif);
  font-size:clamp(2.1rem,4vw,3.7rem);line-height:1.02;color:#dedbd3;
}
.hero-summary{max-width:640px;margin:26px 0 0;color:var(--dim);font-size:1.05rem;line-height:1.7;}
.hero-actions{display:flex;gap:14px;margin-top:30px;flex-wrap:wrap;}

.button{
  display:inline-flex;align-items:center;justify-content:center;gap:24px;
  min-height:52px;padding:0 22px;border-radius:10px;font-size:.9688rem;font-weight:600;
  transition:transform 180ms ease,border-color 180ms ease,background 180ms ease;
}
.button:hover,.button:focus-visible{transform:translateY(-2px);}
.button-primary{background:var(--accent);color:var(--accent-ink);}
.button-secondary{border:1px solid var(--border);background:rgba(255,255,255,.015);}
.button-secondary:hover{border-color:rgba(245,243,237,.35);}

.portrait-panel{
  position:relative;min-height:470px;border:1px solid var(--border);border-radius:18px;
  overflow:hidden;background:#101716;z-index:1;display:flex;
}
.portrait-photo{
  position:absolute;inset:0;width:100%;height:100%;
  object-fit:cover;object-position:50% 16%;
}
/* keeps the overlay words legible over the lower half of the photo */
.portrait-panel::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(7,16,14,.34) 0%,rgba(7,16,14,0) 32%,rgba(7,16,14,.55) 100%);
}
.portrait-copy{
  position:absolute;z-index:2;right:30px;top:44px;text-align:right;
  color:rgba(245,243,237,.62);font-family:var(--serif);font-size:1.25rem;font-style:italic;line-height:1.12;
}
.portrait-copy p{margin:0 0 7px;}
.portrait-copy span{display:block;width:48px;height:2px;margin:16px 0 0 auto;background:var(--accent);}

/* focus strip */
.focus-strip{border-top:1px solid var(--border);padding-block:34px 48px;}
.focus-list{margin-top:18px;display:grid;grid-template-columns:repeat(3,1fr);}
.focus-list p{margin:0;font-family:var(--serif);font-size:clamp(1.3rem,2vw,1.7rem);padding-right:44px;}
.focus-list p + p{border-left:1px solid var(--border);padding-left:44px;}

/* ═══════════ section heading ═══════════ */
.section-heading{display:flex;justify-content:space-between;align-items:center;gap:30px;flex-wrap:wrap;}
.section-heading > a{font-size:.9375rem;color:#dddcd5;}
.section-heading > a span{color:var(--accent);}
.section-heading > a:hover{color:var(--accent);}

/* ═══════════ project cards ═══════════ */
.projects{border-top:1px solid var(--border);padding-block:38px 72px;}
.project-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:26px;margin-top:28px;}
.project-card{
  border:1px solid var(--border);border-radius:15px;overflow:hidden;
  background:linear-gradient(180deg,rgba(255,255,255,.025),rgba(255,255,255,.012));
  transition:transform 220ms ease,border-color 220ms ease;
  display:flex;flex-direction:column;
}
.project-card:hover{transform:translateY(-4px);border-color:rgba(245,243,237,.28);}
.project-art{background:#0d1614;border-bottom:1px solid var(--border-soft);}
.project-art svg{width:100%;height:auto;display:block;}
.project-body{padding:24px 26px 26px;display:flex;flex-direction:column;flex:1;}
.project-meta{margin:0 0 10px;color:#8e928d;font-size:.875rem;letter-spacing:.15em;text-transform:uppercase;}
.project-body h2,.project-body h3{margin:0 0 10px;font-size:1.3rem;letter-spacing:-.025em;}
.project-body p{margin:0;color:var(--muted);line-height:1.65;}
.project-body .go{margin-top:auto;padding-top:22px;display:inline-flex;gap:10px;align-items:center;color:#e7e7df;font-size:.9375rem;}
.project-body .go span{color:var(--accent);}
.project-body .go:hover{color:var(--accent);}

/* ═══════════ repositories ═══════════ */
/* ═══════════ repositories ═══════════
   Each repo reads as a small code window: a mono path line, the description,
   then a meta row, with a bar in the language's own colour along the base. */
.repos{
  margin-top:26px;border-top:none;
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;
}
.repo{
  position:relative;display:flex;flex-direction:column;
  padding:16px 18px 20px;border:1px solid var(--border);border-radius:14px;
  background:linear-gradient(180deg,rgba(255,255,255,.028),rgba(255,255,255,.012));
  overflow:hidden;transition:transform 200ms ease,border-color 200ms ease;
}
.repo::before{
  content:"";position:absolute;left:0;right:0;bottom:0;height:3px;
  background:var(--lang,var(--accent));opacity:.55;
  transition:opacity 200ms ease,height 200ms ease;
}
.repo:hover,.repo:focus-visible{transform:translateY(-3px);border-color:rgba(139,255,67,.42);}
.repo:hover::before,.repo:focus-visible::before{opacity:1;height:5px;}
.repo-name{
  font-family:var(--mono);font-size:.9375rem;font-weight:500;letter-spacing:-.01em;
  color:var(--text);word-break:break-word;transition:color 180ms ease;
}
.repo-name::before{content:"~/ ";color:var(--accent);opacity:.65;}
.repo-name em{font-style:normal;color:#7f847e;}
.repo:hover .repo-name,.repo:focus-visible .repo-name{color:var(--accent);}
.repo-desc{
  margin:10px 0 0;color:var(--muted);font-size:.9375rem;line-height:1.6;max-width:none;flex:1;
}
.repo-meta{
  display:flex;align-items:center;gap:8px 16px;flex-wrap:wrap;margin-top:16px;
  font-family:var(--mono);font-size:.8438rem;color:#7f847e;
}
.repo-lang{display:inline-flex;align-items:center;gap:7px;color:var(--dim);}
.repo-lang i{width:9px;height:9px;border-radius:50%;display:block;flex:none;background:var(--lang,var(--accent));}
.repo-role{
  border:1px solid var(--border);border-radius:999px;padding:2px 9px;
  letter-spacing:.09em;text-transform:uppercase;font-size:.8438rem;color:var(--dim);
}
@media (max-width:980px){ .repos{grid-template-columns:1fr;} }


/* ═══════════ detail cards (research) ═══════════ */
.detail-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin-top:30px;}
.detail-card{
  min-height:230px;padding:28px;border:1px solid var(--border);border-radius:14px;
  background:rgba(255,255,255,.018);transition:border-color 200ms ease;
  display:flex;flex-direction:column;
}
.detail-card:hover{border-color:rgba(139,255,67,.35);}
.detail-card > .n{display:inline-block;color:var(--accent);font-size:.875rem;letter-spacing:.18em;font-family:var(--mono);}
.detail-card h3{margin:36px 0 10px;font-family:var(--serif);font-size:1.9rem;font-weight:400;letter-spacing:0;}
.detail-card p{margin:0;color:var(--muted);line-height:1.7;}

.research-question{border-top:1px solid var(--border);padding-block:70px 78px;}
.research-question > p:last-child{
  max-width:1000px;margin:22px 0 0;font-family:var(--serif);
  font-size:clamp(2.2rem,5vw,4.6rem);line-height:1.02;
}

/* two-column split */
.split{
  display:grid;grid-template-columns:.9fr 1.1fr;gap:80px;
  border-top:1px solid var(--border);padding-block:62px;
}
.split-intro h2{margin:18px 0 0;font-family:var(--serif);font-size:clamp(2rem,3.6vw,3.4rem);font-weight:400;letter-spacing:0;line-height:1.05;}

/* values */
.values-grid{
  display:grid;grid-template-columns:repeat(3,1fr);margin-top:30px;
  border-top:1px solid var(--border);border-bottom:1px solid var(--border);
}
.value{padding:34px 30px 40px 0;}
.value + .value{border-left:1px solid var(--border);padding-left:30px;}
.value h3{margin:0 0 12px;font-family:var(--serif);font-size:1.9rem;font-weight:400;letter-spacing:0;}
.value p{margin:0;color:var(--muted);line-height:1.7;}

/* ═══════════ publications ═══════════ */
.filters{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:30px;}
.chip{
  font-size:.875rem;font-weight:600;padding:8px 15px;border-radius:999px;
  border:1px solid var(--border);background:rgba(255,255,255,.015);color:var(--muted);cursor:pointer;
  transition:background 180ms ease,color 180ms ease,border-color 180ms ease;
}
.chip:hover{border-color:rgba(139,255,67,.5);color:var(--text);}
.chip[aria-pressed="true"]{background:var(--accent);color:var(--accent-ink);border-color:var(--accent);}
.count{font-family:var(--mono);font-size:.875rem;color:#7f847e;margin-left:auto;}

/* The live filter count and the static reviewing credential, stacked at the
   end of the filter row. They are different kinds of fact — one changes when
   you filter, one never does — so they read better on separate lines than
   side by side. */
.counts{margin-left:auto;display:flex;flex-direction:column;align-items:flex-end;gap:2px;}
.counts .count{margin-left:0;}
.count-note{color:#6b706a;}
@media (max-width:640px){
  .counts{margin-left:0;margin-top:4px;align-items:flex-start;}
}

.pubs{margin-top:26px;border-bottom:1px solid var(--border);}
.pub{
  display:grid;grid-template-columns:110px minmax(0,1fr);gap:28px;
  padding-block:28px;border-top:1px solid var(--border);
}
.pub-kind{font-family:var(--mono);font-size:.8438rem;letter-spacing:.16em;text-transform:uppercase;color:#7f847e;padding-top:7px;}
.pub-title{
  display:inline-block;font-family:var(--serif);font-size:1.62rem;line-height:1.14;letter-spacing:0;
  border-bottom:1px solid transparent;transition:color 180ms ease,border-color 180ms ease;
}
.pub-title:hover,.pub-title:focus-visible{color:var(--accent);border-bottom-color:rgba(139,255,67,.5);}
.pub-authors{margin:12px 0 0;color:var(--dim);font-size:.9688rem;line-height:1.6;}
.pub-authors strong{color:var(--text);font-weight:600;}
.pub-venue{margin:6px 0 12px;font-family:var(--mono);font-size:.875rem;color:#7f847e;letter-spacing:.02em;}
.pub-desc{margin:0;color:var(--muted);line-height:1.7;max-width:62ch;}

/* venue groups */
.pub-group{margin-top:40px;}
.pub-group:first-of-type{margin-top:26px;}
.group-head{
  display:flex;align-items:baseline;gap:14px;flex-wrap:wrap;margin:0 0 4px;
  font-family:var(--serif);font-weight:400;font-size:1.75rem;letter-spacing:0;color:var(--text);
}
.group-count{
  font-family:var(--mono);font-size:.8438rem;letter-spacing:.16em;color:#7f847e;
  border:1px solid var(--border);border-radius:999px;padding:2px 9px;
}
.pub-group .pubs{margin-top:12px;}

.cite-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px;}
.btn-s{
  display:inline-flex;align-items:center;gap:9px;
  font-size:.875rem;font-weight:600;padding:9px 15px;border-radius:8px;
  border:1px solid var(--border);background:rgba(255,255,255,.015);color:#dddcd5;cursor:pointer;
  transition:border-color 180ms ease,color 180ms ease,background 180ms ease;
}
.btn-s:hover,.btn-s:focus-visible{border-color:rgba(245,243,237,.35);color:var(--text);}
.btn-go{border-color:rgba(139,255,67,.45);}
.btn-go span{color:var(--accent);}
.btn-go:hover,.btn-go:focus-visible{background:var(--accent);color:var(--accent-ink);border-color:var(--accent);}
.btn-go:hover span,.btn-go:focus-visible span{color:var(--accent-ink);}

.cite-panel{margin-top:14px;border:1px solid var(--border);border-radius:10px;background:rgba(0,0,0,.25);}
.cite-panel pre{
  margin:0;padding:18px 20px;overflow-x:auto;
  font-family:var(--mono);font-size:.875rem;line-height:1.7;color:#b9beb6;
}
.cite-panel .copy-wrap{padding:0 20px 18px;}
.empty{
  margin-top:24px;padding:26px;border:1px dashed var(--border);border-radius:12px;
  color:var(--muted);text-align:center;font-size:.95rem;
}

.note{margin-top:28px;color:var(--muted);font-size:.9375rem;}
.note a{border-bottom:1px solid var(--border);}
.note a:hover{color:var(--accent);border-bottom-color:var(--accent);}

/* ═══════════ cv ═══════════ */
.cv-row{
  display:grid;grid-template-columns:200px 1fr;gap:44px;
  padding:34px 0;border-bottom:1px solid var(--border);
}
.cv-row:first-of-type{border-top:1px solid var(--border);}
.cv-row h3{margin:0 0 9px;font-size:1.22rem;}
.cv-row p{margin:0;color:var(--dim);font-size:1rem;line-height:1.7;}
.cv-row a.text-link{border-bottom:1px solid var(--accent);}
.cv-row a.text-link:hover{color:var(--accent);}

.slot{border:1px dashed var(--border);border-radius:12px;background:rgba(255,255,255,.015);padding:20px 22px;}
.slot .tag{
  display:inline-block;margin-bottom:8px;color:var(--accent);
  font-family:var(--mono);font-size:.8438rem;letter-spacing:.18em;text-transform:uppercase;
}
.slot p{margin:0;color:var(--muted);font-size:.94rem;line-height:1.65;}
.sub{
  margin:38px 0 12px;font-family:var(--mono);font-size:.8438rem;letter-spacing:.18em;
  text-transform:uppercase;color:#7f847e;
}

/* ═══════════ contact ═══════════ */
.mail-wrap{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-top:22px;}
.mail-big{
  font-family:var(--serif);font-size:clamp(1.9rem,4.6vw,3.2rem);line-height:1.1;
  border-bottom:2px solid var(--accent);padding-bottom:4px;overflow-wrap:anywhere;
  transition:color 180ms ease;
}
.mail-big:hover,.mail-big:focus-visible{color:var(--accent);}
.links{list-style:none;margin:40px 0 0;padding:0;border-top:1px solid var(--border);}
.links li{border-bottom:1px solid var(--border-soft);}
.links a{display:flex;align-items:baseline;justify-content:space-between;gap:18px;padding-block:16px;font-size:1rem;font-weight:500;transition:color 180ms ease;}
.links .h{font-family:var(--mono);font-size:.8438rem;color:#7f847e;text-align:right;overflow-wrap:anywhere;}
.links a:hover,.links a:focus-visible{color:var(--accent);}
.links a:hover .h{color:var(--accent);}

/* ═══════════ pager + footer ═══════════ */
.pager{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:64px;padding-top:32px;border-top:1px solid var(--border);}
.pg{
  display:flex;flex-direction:column;gap:5px;padding:20px 22px;
  border:1px solid var(--border);border-radius:12px;background:rgba(255,255,255,.015);
  transition:border-color 180ms ease,transform 180ms ease;
}
.pg:hover,.pg:focus-visible{border-color:rgba(139,255,67,.4);transform:translateY(-2px);}
.pg span{font-family:var(--mono);font-size:.8438rem;letter-spacing:.18em;text-transform:uppercase;color:#7f847e;}
.pg strong{font-family:var(--serif);font-size:1.35rem;font-weight:400;letter-spacing:0;}
.pg.next{text-align:right;align-items:flex-end;grid-column:2;}

.site-footer{
  min-height:114px;border-top:1px solid var(--border);
  display:grid;grid-template-columns:1fr auto auto;align-items:center;gap:30px;
  color:#c8c7c0;font-size:.9375rem;
  padding-block:28px calc(32px + env(safe-area-inset-bottom,0px));
}
.footer-brand{display:flex;align-items:center;gap:18px;}
.footer-divider{width:1px;height:22px;background:var(--border);}
.footer-links{display:flex;gap:20px;align-items:center;flex-wrap:wrap;}
.footer-links a{color:#c8c7c0;transition:color 180ms ease;}
.footer-links a:hover{color:var(--accent);}
.footer-tagline{margin:0;font-family:var(--serif);font-style:italic;color:#aeada8;}

/* ═══════════ palette / toast / totop ═══════════ */
.palette{
  position:fixed;inset:0;z-index:70;display:flex;align-items:flex-start;justify-content:center;
  padding:11vh 16px 16px;background:rgba(3,8,7,.66);
  -webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);
}
.palette-box{
  width:min(560px,100%);background:#0d1614;border:1px solid var(--border);
  border-radius:14px;box-shadow:0 30px 70px rgba(0,0,0,.6);overflow:hidden;
}
.palette input{
  width:100%;border:none;border-bottom:1px solid var(--border);background:transparent;color:var(--text);
  font-family:inherit;font-size:1rem;padding:18px 20px;outline:none;
}
.palette input::placeholder{color:#6d726c;}
.palette ul{list-style:none;margin:0;padding:8px;max-height:44vh;overflow-y:auto;}
.palette li button{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:12px;
  background:transparent;border:none;color:var(--text);font-size:.94rem;font-weight:500;
  text-align:left;padding:11px 13px;border-radius:9px;cursor:pointer;
}
.palette li.sel button,.palette li button:hover{background:var(--surface-strong);}
.palette .kind{font-family:var(--mono);font-size:.8438rem;color:#7f847e;text-transform:uppercase;letter-spacing:.14em;flex:none;}
.palette-foot{border-top:1px solid var(--border);padding:10px 16px;font-family:var(--mono);font-size:.8438rem;color:#6d726c;display:flex;gap:18px;flex-wrap:wrap;}

.toast{
  position:fixed;left:50%;bottom:calc(28px + env(safe-area-inset-bottom,0px));z-index:80;
  background:var(--accent);color:var(--accent-ink);font-size:.9375rem;font-weight:700;
  padding:11px 20px;border-radius:999px;box-shadow:0 16px 40px rgba(0,0,0,.5);
  opacity:0;transform:translateX(-50%) translateY(10px);pointer-events:none;
  transition:opacity .2s ease,transform .2s ease;
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0);}

.totop{
  position:fixed;right:24px;bottom:calc(24px + env(safe-area-inset-bottom,0px));z-index:45;
  width:44px;height:44px;border-radius:50%;background:#0d1614;color:var(--text);
  border:1px solid var(--border);cursor:pointer;display:flex;align-items:center;justify-content:center;
  opacity:0;pointer-events:none;transition:opacity .22s ease,border-color .18s ease;
}
.totop.show{opacity:1;pointer-events:auto;}
.totop:hover{color:var(--accent);border-color:rgba(139,255,67,.4);}
.totop svg{width:17px;height:17px;}

:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:2px;}

@media (prefers-reduced-motion:no-preference){
  .enter-1,.enter-2,.enter-3{animation:rise 620ms cubic-bezier(.2,.7,.3,1) backwards;}
  .enter-2{animation-delay:80ms;}
  .enter-3{animation-delay:160ms;}
  @keyframes rise{from{opacity:0;transform:translateY(16px);}to{opacity:1;transform:none;}}
}

/* ═══════════ responsive ═══════════ */
@media (max-width:980px){
  .site-header{grid-template-columns:1fr auto;min-height:78px;}
  .header-note{display:none;}
  .site-nav{display:none;}
  .menu-toggle{
    display:inline-flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;
    width:44px;height:44px;justify-self:end;border:1px solid var(--border);border-radius:10px;
    background:rgba(255,255,255,.02);cursor:pointer;transition:border-color 180ms ease;
  }
  .menu-toggle:hover,.menu-toggle:focus-visible{border-color:rgba(139,255,67,.5);}
  .menu-toggle i{display:block;width:18px;height:1.5px;border-radius:2px;background:var(--text);transition:transform 220ms ease,opacity 160ms ease;}
  .menu-toggle[aria-expanded="true"] i:nth-child(1){transform:translateY(5.5px) rotate(45deg);}
  .menu-toggle[aria-expanded="true"] i:nth-child(2){opacity:0;}
  .menu-toggle[aria-expanded="true"] i:nth-child(3){transform:translateY(-5.5px) rotate(-45deg);}

  /* menu drops below the bar; the page stays visible behind it */
  .drawer{
    display:none;position:absolute;top:100%;left:0;right:0;
    background:#0a1311;border-top:1px solid var(--border-soft);border-bottom:1px solid var(--border);
    box-shadow:0 24px 50px rgba(0,0,0,.55);
    padding:10px 24px calc(22px + env(safe-area-inset-bottom,0px));
    max-height:min(74vh,540px);overflow-y:auto;overscroll-behavior:contain;
    flex-direction:column;gap:16px;
  }
  body.menu-open .drawer{display:flex;}
  @media (prefers-reduced-motion:no-preference){
    body.menu-open .drawer{animation:dropIn 220ms cubic-bezier(.2,.7,.3,1);}
    @keyframes dropIn{from{opacity:0;transform:translateY(-10px);}to{opacity:1;transform:none;}}
  }
  .drawer .site-nav{display:flex;flex-direction:column;gap:0;}
  .drawer .site-nav a{
    font-size:1.15rem;color:var(--text);padding:14px 0;border-bottom:1px solid var(--border-soft);
  }
  .drawer .site-nav a:last-child{border-bottom:none;}
  .drawer .site-nav a[aria-current="page"]{color:var(--accent);}
  .drawer .site-nav a[aria-current="page"]::after{display:none;}
  .drawer-note{
    margin:0;display:flex;gap:11px;align-items:flex-start;padding-top:14px;
    border-top:1px solid var(--border-soft);
    font-family:var(--serif);font-style:italic;font-size:1rem;color:#c9c8c2;
  }
  .drawer-mail{font-size:.95rem;border-bottom:1px solid var(--border);padding-bottom:2px;}

  .hero{grid-template-columns:1fr;padding-top:48px;gap:44px;}
  .hero::after{right:-250px;top:260px;}
  .portrait-panel{min-height:420px;}
  .split{grid-template-columns:1fr;gap:34px;}
  .detail-grid,.project-grid{grid-template-columns:1fr;}
  .values-grid{grid-template-columns:1fr;}
  .value{padding:28px 0;}
  .value + .value{border-left:0;border-top:1px solid var(--border);padding-left:0;}
  .site-footer{grid-template-columns:1fr;}
}

@media (max-width:640px){
  .site-header,.pad,.site-footer{width:min(calc(100% - 32px),var(--max));}
  .brand{gap:11px;}
  .logo-mark{width:38px;height:38px;border-radius:10px;}
  .brand-text strong{font-size:.95rem;}
  .brand-text em{font-size:.8438rem;}
  .drawer{padding-inline:16px;}
  .pad{padding-block:46px;}
  .focus-list{grid-template-columns:1fr;}
  .focus-list p{padding:14px 0;}
  .focus-list p + p{border-left:0;border-top:1px solid var(--border);padding-left:0;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .button{width:100%;justify-content:space-between;}
  .portrait-panel{min-height:330px;}
  .portrait-copy{right:22px;top:26px;font-size:1.05rem;}
  .pub{grid-template-columns:1fr;gap:10px;}
  .pub-kind{padding-top:0;}
  .count{margin-left:0;width:100%;}
  .cv-row{grid-template-columns:1fr;gap:12px;}
  .pager{grid-template-columns:1fr;}
  .pg.next{grid-column:1;text-align:left;align-items:flex-start;}
}

/* very narrow phones: the qualifier line is the first thing to go */
@media (max-width:380px){
  .brand-text em{display:none;}
}

@media print{
  .site-header,.drawer,.scrim,.totop,.toast,.palette,.filters,.cite-row,.cite-panel,
  .slot,.skip,.empty,.pager,.hero-actions,.portrait-panel,.site-footer{display:none !important;}
  body{background:#fff;color:#000;}
  .shell{overflow:visible;}
  .hero{grid-template-columns:1fr;}
  a{color:#000;}
}

/* ═══════════ reveal on scroll ═══════════
   Nothing starts hidden in the stylesheet itself. The `js-reveal` class is
   added by a small script in <head>, so with JavaScript off — or if that
   script fails — every block renders normally and stays readable to people,
   crawlers and link previews. */
.js-reveal :is(.hero-copy, .portrait-panel, .focus-strip > .kicker, .focus-list, .section-heading, .project-card, .pub-group, .repo, .detail-card, .value, .cv-row, .split > div, .research-question > *, .slot, .inprogress, .pager, .links, .mail-wrap, .filters){
  opacity:0;
  transform:translateY(18px);
}
.js-reveal :is(.hero-copy, .portrait-panel, .focus-strip > .kicker, .focus-list, .section-heading, .project-card, .pub-group, .repo, .detail-card, .value, .cv-row, .split > div, .research-question > *, .slot, .inprogress, .pager, .links, .mail-wrap, .filters).is-in{
  opacity:1;
  transform:none;
  transition:opacity 620ms ease, transform 620ms cubic-bezier(.2,.7,.3,1);
}
@media (prefers-reduced-motion:reduce){
  .js-reveal :is(.hero-copy, .portrait-panel, .focus-strip > .kicker, .focus-list, .section-heading, .project-card, .pub-group, .repo, .detail-card, .value, .cv-row, .split > div, .research-question > *, .slot, .inprogress, .pager, .links, .mail-wrap, .filters),
  .js-reveal :is(.hero-copy, .portrait-panel, .focus-strip > .kicker, .focus-list, .section-heading, .project-card, .pub-group, .repo, .detail-card, .value, .cv-row, .split > div, .research-question > *, .slot, .inprogress, .pager, .links, .mail-wrap, .filters).is-in{opacity:1;transform:none;transition:none;}
}
@media print{
  .js-reveal :is(.hero-copy, .portrait-panel, .focus-strip > .kicker, .focus-list, .section-heading, .project-card, .pub-group, .repo, .detail-card, .value, .cv-row, .split > div, .research-question > *, .slot, .inprogress, .pager, .links, .mail-wrap, .filters){opacity:1 !important;transform:none !important;}
}

/* ═══════════ leetcode panel ═══════════ */
.lc{
  margin-top:34px;padding:24px 26px 22px;
  border:1px solid var(--border);border-radius:16px;
  background:linear-gradient(180deg,rgba(255,255,255,.028),rgba(255,255,255,.01));
}
.lc-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;}
.lc-k{
  margin:0 0 6px;font-family:var(--mono);font-size:.8438rem;letter-spacing:.18em;
  text-transform:uppercase;color:var(--accent);
}
.lc-total{margin:0;font-family:var(--serif);font-size:1.7rem;line-height:1.1;color:var(--text);}
.lc-total strong{font-weight:400;font-size:2.4rem;color:var(--accent);}
.lc-total em{font-style:italic;color:var(--muted);font-size:1.25rem;}
.lc-tiers{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;margin-top:26px;}
.lc-tier-k{
  margin:0 0 12px;font-family:var(--mono);font-size:.8438rem;letter-spacing:.15em;
  text-transform:uppercase;color:#7f847e;
}
.lc-tags{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:11px;}
.lc-tags li{position:relative;display:flex;justify-content:space-between;gap:12px;align-items:baseline;padding-bottom:9px;}
.lc-tags li::before,.lc-tags li::after{content:"";position:absolute;left:0;bottom:0;height:3px;border-radius:2px;}
.lc-tags li::before{right:0;background:var(--border-soft);}
.lc-tags li::after{width:calc(var(--n) / var(--max) * 100%);background:var(--accent);opacity:.8;}
.lc-tags span{font-size:.9375rem;color:var(--dim);}
.lc-tags b{font-family:var(--mono);font-size:.875rem;font-weight:500;color:var(--accent);}
.lc-note{margin:22px 0 0;font-size:.875rem;color:#7f847e;}
@media (max-width:860px){ .lc-tiers{grid-template-columns:1fr;gap:22px;} .lc{padding:20px;} }