/* Mallory — Yale's official brand sans-serif (self-hosted from Yale's webfont CDN).
   Used for the "Zhang Lab" wordmark; matches the logo font on yale.edu sites. */
@font-face{font-family:"Mallory";src:url("fonts/Mallory/Mallory-Book.woff2") format("woff2");font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:"Mallory";src:url("fonts/Mallory/Mallory-Medium.woff2") format("woff2");font-weight:500;font-style:normal;font-display:swap}
@font-face{font-family:"Mallory";src:url("fonts/Mallory/Mallory-Bold.woff2") format("woff2");font-weight:700;font-style:normal;font-display:swap}
@font-face{font-family:"Yale";src:url("fonts/Yale/Yale2024-Roman.woff2") format("woff2");font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:"Yale";src:url("fonts/Yale/Yale2024-Italic.woff2") format("woff2");font-weight:400;font-style:italic;font-display:swap}
@font-face{font-family:"Yale";src:url("fonts/Yale/Yale2024-Bold.woff2") format("woff2");font-weight:700;font-style:normal;font-display:swap}
@font-face{font-family:"Yale";src:url("fonts/Yale/Yale2024-BoldItalic.woff2") format("woff2");font-weight:700;font-style:italic;font-display:swap}

:root{
  --yale:#00356b;
  --yale-light:#286dc0;
  --ink:#15202b;
  --muted:#5a6472;
  --bg:#ffffff;
  --soft:#f4f6f9;
  --line:#e3e8ef;
  --accent:#bd5319;
  --brand-text:#00356b;   /* headings/wordmark; flips light in dark mode (--yale stays for dark hero/footer bg) */
}
/* DARK MODE — the nav toggle is hidden; dark mode is a hidden feature you
   turn on from the terminal (` then `theme dark`). */
html.dark{
  --ink:#e6edf3;
  --muted:#9aa7b4;
  --bg:#0f141a;
  --soft:#161d26;
  --line:#283139;
  --yale-light:#7fb3e8;
  --accent:#e3884a;
  --brand-text:#9cc4ee;
}
html{color-scheme:light dark}
html.dark{color-scheme:dark}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Helvetica Neue",Arial,sans-serif;color:var(--ink);line-height:1.65;background:var(--bg)}
h1,h2,h3,.brand{font-family:"Yale",Georgia,"Times New Roman",serif;letter-spacing:0}
a{color:var(--yale-light);text-decoration:none}
a:hover{text-decoration:underline}

header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.93);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
html.dark header{background:rgba(15,20,26,.92)}
nav{max-width:1080px;margin:0 auto;display:flex;align-items:center;gap:18px;padding:14px 24px}
.brand{display:flex;align-items:center;margin-right:auto;font-family:"Yale",Georgia,"Times New Roman",serif;font-weight:700;color:var(--brand-text);font-size:1.6rem;letter-spacing:0}
.brand:hover{text-decoration:none}
.navlinks{display:flex;gap:24px;font-size:.92rem;font-weight:600}
.navlinks a{color:var(--ink)}
.navlinks a:hover{color:var(--yale-light);text-decoration:none}
.navlinks a.active{color:var(--yale-light)}
.theme-toggle{background:none;border:0;cursor:pointer;font-size:1.2rem;line-height:1;color:var(--brand-text);padding:4px 6px;border-radius:6px}
.theme-toggle:hover{background:var(--soft)}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:6px}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--brand-text);border-radius:2px;transition:transform .2s,opacity .2s}
header.nav-open .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
header.nav-open .nav-toggle span:nth-child(2){opacity:0}
header.nav-open .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

.hero{background:linear-gradient(135deg,var(--yale) 0%,#0a2c54 100%);color:#fff;padding:96px 0 84px;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(40,109,192,.45),transparent 70%);z-index:1}
.hero-canvas{position:absolute;inset:0;z-index:0;pointer-events:none}
.hero-inner{max-width:1080px;margin:0 auto;position:relative;z-index:2;padding:0 24px}
.eyebrow{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.eyebrow .sep{width:1px;height:18px;background:rgba(255,255,255,.4)}
.eyebrow a{font-family:"Yale",Georgia,"Times New Roman",serif;font-size:1.02rem;color:#fff;opacity:.85}
.eyebrow a:hover{text-decoration:none;opacity:1}
.hero h1{font-size:3.1rem;line-height:1.08;margin:14px 0 20px;max-width:820px;font-weight:800;letter-spacing:-.025em}
.hero p{font-size:1.2rem;max-width:660px;opacity:.93}
.cta{margin-top:32px;display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 24px;border-radius:8px;font-weight:700;font-size:.92rem}
.btn-primary{background:#fff;color:var(--yale)}
.btn-ghost{border:1.5px solid rgba(255,255,255,.5);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12);text-decoration:none}
.btn-primary:hover{text-decoration:none}

section{max-width:1080px;margin:0 auto;padding:90px 24px}
.section-label{color:var(--accent);font-weight:700;letter-spacing:.14em;text-transform:uppercase;font-size:.75rem;margin-bottom:14px}
h2{font-size:2.1rem;color:var(--brand-text);margin-bottom:22px;font-weight:800;letter-spacing:-.02em}
.lead{font-size:1.12rem;line-height:1.7;color:var(--muted);max-width:720px}
.lead + .lead{margin-top:16px}

.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;margin-top:34px}
.card{border:1px solid var(--line);border-radius:14px;padding:26px;background:var(--bg);transition:.2s}
.card:hover{box-shadow:0 8px 30px rgba(0,53,107,.10);transform:translateY(-3px)}
.card .ic{width:48px;height:48px;border-radius:11px;background:var(--soft);display:grid;place-items:center;font-size:1.45rem;margin-bottom:14px}
.card h3{color:var(--brand-text);font-size:1.14rem;margin-bottom:8px}
.card p{color:var(--muted);font-size:.95rem}

/* full-bleed research banner: photo background with the title on top */
.research-banner{position:relative;background:#08152b url("research_figures/optical-table.jpg") center/cover no-repeat;border-bottom:1px solid var(--line)}
.research-banner::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(4,14,30,.82) 0%,rgba(4,14,30,.45) 55%,rgba(4,14,30,.22) 100%)}
.research-banner-inner{position:relative;z-index:1;max-width:1080px;margin:0 auto;padding:78px 24px;min-height:140px;color:#fff;display:flex;flex-direction:column;justify-content:center}
.research-banner h2{color:#fff;margin:0;font-size:clamp(1.7rem,4.4vw,2.7rem);line-height:1.15}

/* interactive ytterbium level diagram (levels.js) */
#level-diagram{position:relative;margin-top:26px;background:linear-gradient(180deg,#fbf9f4 0%,var(--soft) 100%);border:1px solid var(--line);border-radius:18px;padding:22px 28px 18px;box-shadow:0 1px 0 rgba(255,255,255,.6) inset,0 18px 36px -28px rgba(0,53,107,.22)}
.lvl-lasers{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:14px}
.lvl-lasers::before{content:"Lasers";font:700 .7rem "Mallory","Helvetica Neue",Arial,sans-serif;letter-spacing:.18em;text-transform:uppercase;color:var(--muted);margin-right:4px}
.lvl-laser{--lc:#888;display:inline-flex;align-items:center;gap:7px;border:1.5px solid var(--lc);color:var(--lc);background:#fff;border-radius:999px;padding:6px 14px 6px 11px;font:600 .82rem "Mallory","Helvetica Neue",Arial,sans-serif;cursor:pointer;transition:background .18s,color .18s,box-shadow .18s,transform .18s}
.lvl-laser::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--lc);opacity:.4;transition:opacity .18s,box-shadow .18s}
.lvl-laser:hover{transform:translateY(-1px)}
.lvl-laser.on{background:var(--lc);color:#fff;box-shadow:0 0 0 3px rgba(0,0,0,.04),0 10px 22px -10px var(--lc);transform:translateY(-1px)}
.lvl-laser.on::before{background:#fff;opacity:1;box-shadow:0 0 8px rgba(255,255,255,.85)}
.lvl-svg{width:100%;height:auto;display:block;touch-action:none}
.lvl-grid{stroke:var(--line);stroke-width:1;stroke-dasharray:2 5;opacity:.5}
.lvl-tick-lbl{fill:var(--muted);font:600 9px "Helvetica Neue",Arial,sans-serif;letter-spacing:.04em;opacity:.85}
.lvl-line{stroke:var(--brand-text);stroke-width:2.6;stroke-linecap:round;transition:stroke .2s,stroke-width .2s}
.lvl-line.meta{stroke:var(--yale);stroke-width:3.4}
.lvl-line.occupied{stroke:var(--accent);stroke-width:4}
.lvl-line.hot{stroke:var(--accent);stroke-width:4.8}
.lvl-meta-dot{fill:var(--yale);opacity:.75}
.lvl-lbl{fill:var(--ink);font:600 14px "Mallory","Helvetica Neue",Arial,sans-serif;pointer-events:none}
.lvl-lbl.meta{fill:var(--yale);font-weight:700}
.lvl-head{fill:var(--brand-text);font:800 15px "Mallory","Helvetica Neue",Arial,sans-serif;letter-spacing:.05em}
.lvl-cfg{fill:var(--muted);font:500 10.5px "Mallory","Helvetica Neue",Arial,sans-serif;letter-spacing:.03em}
.lvl-axis{stroke:var(--line);stroke-width:1.5}
.lvl-axis-head{fill:var(--line)}
.lvl-axis-lbl{fill:var(--muted);font:700 10px "Mallory","Helvetica Neue",Arial,sans-serif;letter-spacing:.22em;text-transform:uppercase}
.lvl-atom{fill:var(--accent);cursor:grab;filter:drop-shadow(0 1px 2px rgba(0,0,0,.18)) drop-shadow(0 0 10px rgba(189,83,25,.55))}
.lvl-atom:active{cursor:grabbing}
.lvl-atom.excited{animation:lvlPulse 1.15s ease-in-out infinite}
@keyframes lvlPulse{0%,100%{filter:drop-shadow(0 1px 2px rgba(0,0,0,.18)) drop-shadow(0 0 11px rgba(238,150,80,.75)) drop-shadow(0 0 2px rgba(255,210,160,.8))}50%{filter:drop-shadow(0 1px 2px rgba(0,0,0,.18)) drop-shadow(0 0 22px rgba(255,180,100,.95)) drop-shadow(0 0 4px rgba(255,225,170,.95))}}
.lvl-photon{fill:none;stroke-width:2.2;stroke-linecap:round;opacity:.95;transition:opacity 1s;filter:drop-shadow(0 0 4px currentColor)}
.lvl-photon.laser{stroke-width:2.8;stroke-linecap:butt;filter:drop-shadow(0 0 6px currentColor) drop-shadow(0 0 2px currentColor)}
.lvl-wl{font:700 11.5px "Mallory","Helvetica Neue",Arial,sans-serif;transition:opacity 1s;letter-spacing:.02em}
.lvl-status{margin-top:14px;font:500 .9rem "Mallory","Helvetica Neue",Arial,sans-serif;color:var(--muted);min-height:1.4em;display:flex;align-items:center;gap:10px}
.lvl-status::before{content:"";display:inline-block;width:9px;height:9px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px rgba(189,83,25,.18);transition:background .2s,box-shadow .2s;flex:0 0 auto}
.lvl-status.stable::before{background:var(--yale-light);box-shadow:0 0 0 4px rgba(40,109,192,.18)}
.lvl-status.dark::before{background:#9aa3ad;box-shadow:0 0 0 4px rgba(154,163,173,.18)}
.lvl-hit{cursor:help}
.lvl-line.peek{stroke:var(--yale-light);stroke-width:4.4}
/* hover tooltip — physics of the hovered state */
.lvl-tip{position:absolute;z-index:6;pointer-events:none;min-width:190px;max-width:248px;background:var(--bg);border:1px solid var(--line);border-radius:12px;box-shadow:0 12px 32px -12px rgba(0,53,107,.4);padding:11px 13px;font:500 .8rem "Mallory","Helvetica Neue",Arial,sans-serif;color:var(--ink)}
.lvl-tip-h{font-weight:700;font-size:.95rem;margin-bottom:7px;color:var(--brand-text)}
.lvl-tip-h b{font-weight:800}
.lvl-tip-row{display:flex;justify-content:space-between;gap:14px;padding:1.5px 0;color:var(--muted)}
.lvl-tip-row span:last-child{color:var(--ink);font-weight:600;font-variant-numeric:tabular-nums}
.lvl-tip-br{margin-top:8px;border-top:1px solid var(--line);padding-top:7px}
.lvl-tip-cap{font:700 .62rem "Mallory","Helvetica Neue",Arial,sans-serif;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin-bottom:5px}
.lvl-tip-ch{display:flex;align-items:baseline;gap:8px;padding:2px 0}
.lvl-tip-to{font-weight:600}
.lvl-tip-p{margin-left:auto;font-weight:700;font-variant-numeric:tabular-nums}
.lvl-tip-wl{font-weight:600;font-variant-numeric:tabular-nums}
.lvl-tip-meta{margin-top:5px;color:var(--muted);line-height:1.45}

/* interactive defect-free array assembly (assembly.js) */
#array-demo{margin-top:26px;background:linear-gradient(180deg,#fbf9f4 0%,var(--soft) 100%);border:1px solid var(--line);border-radius:18px;padding:22px 28px 18px;box-shadow:0 1px 0 rgba(255,255,255,.6) inset,0 18px 36px -28px rgba(0,53,107,.22)}
.arr-controls{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:14px}
.arr-sep{font:700 .7rem "Mallory","Helvetica Neue",Arial,sans-serif;letter-spacing:.18em;text-transform:uppercase;color:var(--muted);margin:0 4px 0 8px}
.arr-btn{border:1.5px solid var(--line);background:#fff;color:var(--ink);border-radius:999px;padding:6px 14px;font:600 .82rem "Mallory","Helvetica Neue",Arial,sans-serif;cursor:pointer;transition:background .18s,color .18s,border-color .18s,box-shadow .18s,transform .18s}
.arr-btn:hover:not(:disabled){transform:translateY(-1px);border-color:var(--brand-text)}
.arr-btn:disabled{opacity:.45;cursor:not-allowed}
.arr-btn.sel{background:var(--yale);color:#fff;border-color:var(--yale);box-shadow:0 0 0 3px rgba(0,0,0,.04),0 10px 22px -10px var(--yale)}
.arr-btn.mode.sel{background:var(--yale-light);border-color:var(--yale-light);box-shadow:0 0 0 3px rgba(0,0,0,.04),0 10px 22px -10px var(--yale-light)}
.arr-btn.primary{background:var(--accent);color:#fff;border-color:var(--accent);box-shadow:0 0 0 3px rgba(0,0,0,.04),0 10px 22px -10px var(--accent);margin-left:auto}
.arr-btn.primary:hover:not(:disabled){background:#a4471a;border-color:#a4471a}
.arr-svg{width:100%;height:auto;display:block;background:radial-gradient(ellipse at center,#fff 0%,var(--soft) 100%);border-radius:10px}
.arr-trap{fill:none;stroke:var(--line);stroke-width:1.2;stroke-dasharray:2 3;opacity:.7}
.arr-tgt{fill:none;stroke:var(--yale-light);stroke-width:1.6;opacity:.55;stroke-dasharray:3 3}
.arr-tgt.defect{stroke:#d04a3a;stroke-width:2.4;opacity:1;stroke-dasharray:none;animation:arrDefect 1.2s ease-in-out infinite}
@keyframes arrDefect{0%,100%{opacity:.7}50%{opacity:1}}
.arr-beam{stroke:var(--accent);stroke-width:1.2;stroke-dasharray:5 4;opacity:.55;animation:arrBeamIn .25s ease-out}
.arr-beam.moved{opacity:.3;stroke-dasharray:2 4}
@keyframes arrBeamIn{from{opacity:0}to{opacity:.55}}
.arr-atom{fill:var(--accent);filter:drop-shadow(0 1px 2px rgba(0,0,0,.18)) drop-shadow(0 0 6px rgba(189,83,25,.55));transition:opacity .35s,filter .35s}
.arr-atom.evaporate{animation:arrEvap .68s ease-out forwards}
@keyframes arrEvap{0%{opacity:1}60%{opacity:.25;filter:drop-shadow(0 0 12px rgba(189,83,25,.45))}100%{opacity:0;filter:none}}
.arr-status{margin-top:14px;font:500 .9rem "Mallory","Helvetica Neue",Arial,sans-serif;color:var(--muted);min-height:1.4em;display:flex;align-items:center;gap:10px}
.arr-status::before{content:"";display:inline-block;width:9px;height:9px;border-radius:50%;background:#9aa3ad;box-shadow:0 0 0 4px rgba(154,163,173,.18);flex:0 0 auto;transition:background .2s,box-shadow .2s}
.arr-status.idle::before{background:var(--yale-light);box-shadow:0 0 0 4px rgba(40,109,192,.18)}
.arr-status.running::before{background:var(--accent);box-shadow:0 0 0 4px rgba(189,83,25,.18);animation:arrPulse 1s ease-in-out infinite}
.arr-status.ok::before{background:#15a86e;box-shadow:0 0 0 4px rgba(21,168,110,.18)}
.arr-status.fail::before{background:#d04a3a;box-shadow:0 0 0 4px rgba(208,74,58,.18)}
@keyframes arrPulse{0%,100%{box-shadow:0 0 0 4px rgba(189,83,25,.18)}50%{box-shadow:0 0 0 7px rgba(189,83,25,.10)}}

.news-band{background:var(--soft)}
.news-item{display:flex;gap:20px;padding:20px 0;border-bottom:1px solid var(--line)}
.news-item .date{flex:0 0 96px;color:var(--accent);font-weight:700;font-size:.85rem;padding-top:2px}
.news-item .txt{flex:1;min-width:0}
.news-item .txt p{font-size:.97rem}
.news-item .news-img{flex:0 0 160px;width:160px;height:100px;object-fit:cover;border-radius:10px;align-self:flex-start}

.people-band{background:var(--soft)}
.pi{display:grid;grid-template-columns:160px 1fr;gap:32px;align-items:start;margin-top:28px}
.pi-photo{position:relative;width:160px;height:160px;border-radius:50%;background:linear-gradient(135deg,var(--yale-light),var(--yale));color:#fff;display:grid;place-items:center;font-size:2.4rem;font-weight:800;overflow:hidden}
.pi h3{font-size:1.3rem;color:var(--brand-text)}
.pi .title{color:var(--accent);font-weight:600;margin-bottom:12px}
.pi p{color:var(--muted);font-size:.97rem;margin-bottom:10px}
.pi .edu{font-size:.88rem;color:var(--muted);margin-top:6px}

/* team headshot cards (postdocs / grads / undergrads) */
.role-head{color:var(--brand-text);margin:36px 0 16px;font-size:1.15rem}
.people-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:24px}
.person{border:1px solid var(--line);border-radius:14px;padding:24px 18px;text-align:center;transition:.2s}
.person:hover{box-shadow:0 8px 30px rgba(0,53,107,.10);transform:translateY(-3px)}
.person-photo{position:relative;width:120px;height:120px;border-radius:50%;margin:0 auto 14px;background:linear-gradient(135deg,var(--yale-light),var(--yale));color:#fff;display:grid;place-items:center;font-size:2rem;font-weight:800;overflow:hidden}
.pi-photo img,.person-photo img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:50% 22%;display:block}
/* when a real photo is present, drop the gradient so no blue ring bleeds at the edge */
.pi-photo:has(img),.person-photo:has(img){background:none}
.person h3{color:var(--brand-text);font-size:1.05rem}
.person .role{color:var(--accent);font-weight:600;font-size:.9rem;margin:2px 0 8px}
.person .edu{font-size:.85rem;color:var(--muted);margin-top:4px;word-break:break-word}

/* alumni (retired members), grouped by former role */
.alum-group{margin-top:12px}
.alum-cat{color:var(--accent);font-weight:700;font-size:.95rem;margin:14px 0 4px}
.alum-list{list-style:none;margin:0;padding:0}
.alum-list li{padding:7px 0;border-bottom:1px solid var(--line);color:var(--ink);font-size:.97rem}
.alum-next{color:var(--muted)}

.join{border:1.5px dashed var(--yale-light);border-radius:14px;padding:30px;background:var(--bg);margin-top:24px}
.join h3{color:var(--brand-text);font-size:1.25rem;margin-bottom:10px}
.join p{color:var(--muted);margin-bottom:14px}
.join ul{margin:0 0 12px 20px;color:var(--ink)}
.join li{margin-bottom:6px}

.pub-year{display:grid;grid-template-columns:64px 1fr;gap:18px;margin-top:18px}
.yr-head{font-weight:800;color:var(--accent);font-size:1.05rem;padding-top:18px;position:sticky;top:64px;height:fit-content}
.pub-list{min-width:0}
.pub{padding:18px 0;border-bottom:1px solid var(--line)}
.pub .title{font-weight:600;color:var(--ink)}
.pub .authors{color:var(--muted);font-size:.9rem;margin:3px 0}
.pub .authors b{color:var(--ink)}
.pub .venue{font-style:italic;color:var(--muted);font-size:.9rem}
.pub .coverage{font-size:.85rem;color:var(--muted);margin-top:5px}
.badges{margin-top:5px;display:flex;flex-wrap:wrap;gap:16px;font-size:.85rem}
.badge{color:var(--yale-light);font-weight:400}
.badge:hover{text-decoration:underline}
.morelink{margin-top:22px;font-size:.95rem}

/* reading list (reading.html) */
.read-group{margin-top:36px}
.read-topic{color:var(--accent);font-size:.78rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;margin:0 0 8px;padding-bottom:8px;border-bottom:1px solid var(--line)}
.read-list{min-width:0}
.read-item{padding:16px 0;border-bottom:1px solid var(--line)}
.read-item:last-child{border-bottom:none}
.read-item .title{font-weight:600;color:var(--ink)}
.read-item .authors{color:var(--muted);font-size:.9rem;margin:3px 0}
.read-item .venue{font-style:italic;color:var(--muted);font-size:.9rem}
.read-item .note{color:var(--ink);font-size:.95rem;margin-top:6px;line-height:1.55;padding-left:12px;border-left:2px solid var(--line)}

.contact{display:grid;grid-template-columns:1fr 1fr;gap:30px;margin-top:24px}
.contact .box{background:var(--soft);border-radius:12px;padding:26px}
.contact h4{color:var(--brand-text);margin-bottom:8px}
.contact p{color:var(--muted);font-size:.95rem}

footer{background:var(--yale);color:#cdd9e8;padding:42px 24px;font-size:.9rem}
.foot-inner{max-width:1080px;margin:0 auto;display:flex;justify-content:space-between;flex-wrap:wrap;gap:20px}
.foot-inner strong{color:#fff}

/* scroll-reveal (added by partials.js; only when motion is allowed).
   Uses an animation, NOT a transition: transitions are skipped when the
   reveal fires before the element's hidden state was ever painted (a common
   race during page load), while an animation always plays from its keyframes. */
.reveal{opacity:0;transform:translateY(18px)}
.reveal.in{opacity:1;transform:none;animation:revealIn .6s ease}
@keyframes revealIn{from{opacity:0;transform:translateY(18px)}}

@media(max-width:820px){
  .nav-toggle{display:flex}
  .navlinks{display:none;position:absolute;top:100%;left:0;right:0;flex-direction:column;gap:0;background:var(--bg);border-bottom:1px solid var(--line);padding:6px 0;box-shadow:0 12px 24px rgba(0,0,0,.12)}
  header.nav-open .navlinks{display:flex}
  .navlinks a{padding:12px 24px}
  .hero h1{font-size:2.1rem}
  .grid{grid-template-columns:1fr}
  .pi{grid-template-columns:1fr}
  .pi-photo{width:120px;height:120px}
  .contact{grid-template-columns:1fr}
  .pub-year{grid-template-columns:1fr;gap:0}
  .yr-head{position:static;padding:24px 0 0}
  .news-item{flex-wrap:wrap}
  .news-item .news-img{flex-basis:100%;width:100%;height:180px;order:3}
}

/* easter-egg terminal (terminal.js — currently NOT loaded on any page;
   to re-enable, add <script src="terminal.js"></script> back before </body>) */
.term-overlay{position:fixed;inset:0;z-index:1000;display:none;background:rgba(6,11,20,.5);backdrop-filter:blur(2px)}
.term-overlay.open{display:block}
.term{position:absolute;left:50%;top:7%;transform:translateX(-50%);width:min(760px,92vw);height:64vh;display:flex;flex-direction:column;overflow:hidden;background:#0c1220;border:1px solid #20304a;border-radius:11px;box-shadow:0 24px 70px rgba(0,0,0,.55);font-family:Menlo,Monaco,"SFMono-Regular",Consolas,"Liberation Mono",monospace;font-size:.85rem;color:#cfe3ff}
.term-bar{display:flex;align-items:center;gap:7px;padding:9px 13px;background:#0a0f1a;border-bottom:1px solid #1a2740;color:#8aa3c8;font-size:.78rem}
.term-dot{width:11px;height:11px;border-radius:50%;display:inline-block}
.term-body{flex:1;overflow:auto;padding:12px 15px;line-height:1.55}
.term-line{white-space:pre-wrap;word-break:break-word;margin:1px 0}
.term-line b{color:#eaf2ff}
.term .muted{color:#7790ad}
.term-prompt{color:#e0875a;font-weight:700}
.term-cite{white-space:pre;overflow:auto;background:#0a1322;border:1px solid #1a2740;border-radius:7px;padding:9px 11px;margin:6px 0;color:#bfe0c8;cursor:pointer}
.term-cite:hover{border-color:#2c4a6e}
.term-in{display:flex;gap:8px;align-items:center;padding:9px 15px;border-top:1px solid #1a2740}
.term-input{flex:1;background:none;border:0;outline:0;color:#eaf2ff;font:inherit}
.term a{color:#7fb3e8}
.term-anim{white-space:pre;overflow:hidden;line-height:1.15;margin:4px 0}
.term-anim.green{color:#5cff8f}