/* Kingsford Onyina — clean academic theme (basic sans, green accent, expandable abstracts) */

:root{
  --bg:#ffffff;
  --fg:#1c1c1c;
  --muted:#63666a;
  --line:#e4e4e4;
  --accent:#15654f;        /* deep green */
  --accent-hover:#0f4c3b;
  --accent-soft:#eef5f2;
  --page:#eef1f2;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --maxw:1000px;
}
html[data-theme="dark"]{
  --bg:#14171a;
  --fg:#e6e6e6;
  --muted:#9aa0a6;
  --line:#2a2e33;
  --accent:#5cc0a0;
  --accent-hover:#7ad3b3;
  --accent-soft:#172420;
  --page:#0e1013;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;background:var(--page);color:var(--fg);
  font-family:var(--sans);font-size:17px;line-height:1.7;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;
  transition:background .2s ease,color .2s ease;
}
a{color:var(--accent);text-decoration:none;}
a:hover{color:var(--accent-hover);text-decoration:underline;text-underline-offset:2px;}
a:focus-visible,button:focus-visible{outline:2px solid currentColor;outline-offset:2px;border-radius:3px;}

/* Header */
.site-header{border-bottom:1px solid var(--line);background:var(--bg);position:sticky;top:0;z-index:20;}
.site-header .bar{display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap;padding:15px 32px;max-width:var(--maxw);margin:0 auto;}
.brand{font-weight:700;font-size:1.1rem;color:var(--fg);}
.brand:hover{color:var(--accent);text-decoration:none;}
.nav{display:flex;align-items:center;gap:22px;flex-wrap:wrap;}
.nav a{color:var(--muted);font-size:.95rem;}
.nav a:hover{color:var(--fg);text-decoration:none;}
.nav a.active{color:var(--accent);font-weight:600;}
.toggle{background:none;border:1px solid var(--line);border-radius:5px;cursor:pointer;font-size:1rem;line-height:1;padding:5px 9px;color:var(--fg);}
.toggle:hover{border-color:var(--accent);}

/* Layout + headings */
main{max-width:var(--maxw);margin:0 auto;padding:2.6rem 32px 3.6rem;background:var(--bg);box-shadow:0 1px 4px rgba(0,0,0,.05);}
.prose{max-width:74ch;}
h1{font-size:2.1rem;font-weight:700;letter-spacing:-.01em;margin:0 0 1rem;color:var(--fg);}
h2{font-size:1.35rem;font-weight:700;margin:2.6rem 0 1rem;padding-bottom:.35rem;border-bottom:2px solid var(--accent);color:var(--fg);}
h3{font-size:1.08rem;font-weight:600;margin:1.2rem 0 .5rem;color:var(--fg);}
p{margin:0 0 1.05rem;}
.muted{color:var(--muted);}

/* Homepage header */
.profile{display:flex;gap:2.2rem;align-items:flex-start;flex-wrap:wrap;margin:0 0 1.5rem;}
.profile__side{flex:0 0 180px;text-align:center;}
.profile .avatar{width:170px;height:170px;border-radius:50%;object-fit:cover;border:1px solid var(--line);}
.profile .pname{font-size:1.5rem;font-weight:700;margin:1rem 0 .15rem;color:var(--fg);}
.profile .prole{font-weight:500;margin:.2rem 0 .1rem;color:var(--fg);}
.profile .porg{color:var(--muted);margin:0 0 .8rem;font-size:.95rem;}
.socials{display:flex;flex-wrap:wrap;justify-content:center;gap:14px;}
.socials a{color:var(--muted);font-size:1.15rem;line-height:1;}
.socials a:hover{color:var(--accent);text-decoration:none;}
.profile__main{flex:1 1 340px;}
.profile__main .pm-h{font-size:1.55rem;font-weight:700;margin:.1rem 0 .8rem;color:var(--fg);}
.profile__main p{color:var(--fg);}
.btn-cv{display:inline-block;background:var(--accent);border:1px solid var(--accent);color:#fff;padding:.5rem 1.1rem;border-radius:5px;font-size:.92rem;font-weight:500;margin:.3rem 0 .2rem;}
.btn-cv:hover{background:var(--accent-hover);border-color:var(--accent-hover);color:#fff;text-decoration:none;}

/* Interests / Education */
.facts{display:flex;flex-wrap:wrap;gap:2.5rem;margin-top:1.6rem;padding-top:1.2rem;border-top:1px solid var(--line);}
.facts > div{flex:1 1 240px;}
.facts h4{font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin:0 0 .6rem;}
.facts ul{list-style:none;padding:0;margin:0;}
.facts .interest-list li{padding:.2rem 0;color:var(--fg);}
.facts .edu li{padding:.3rem 0;}
.facts .edu b{display:block;color:var(--fg);font-weight:600;font-size:.98rem;}
.facts .edu span{color:var(--muted);font-size:.9rem;}

/* Updates — icon timeline with scroll-in animation */
.news{list-style:none;padding:0;margin:.6rem 0 0;position:relative;}
.news::before{content:"";position:absolute;left:18px;top:16px;bottom:16px;width:2px;background:var(--line);}
.news li{position:relative;display:flex;gap:1rem;padding:0 0 1.6rem;}
.news li:last-child{padding-bottom:0;}
.up-icon{position:relative;z-index:1;flex:0 0 auto;width:38px;height:38px;border-radius:50%;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;font-size:.95rem;box-shadow:0 0 0 4px var(--bg);transition:transform .18s ease,box-shadow .18s ease;}
.news li:hover .up-icon{transform:scale(1.08);box-shadow:0 0 0 4px var(--accent-soft);}
.up-body{padding-top:.25rem;min-width:0;}
.news .date{display:block;color:var(--accent);font-weight:600;font-size:.78rem;text-transform:uppercase;letter-spacing:.04em;margin-bottom:.15rem;}
.news .what{margin:0;}
@keyframes newsIn{from{opacity:0;transform:translateY(14px);}to{opacity:1;transform:none;}}
.news.animate li{animation:newsIn .55s cubic-bezier(.2,.7,.3,1) both;}
.news.animate li:nth-child(1){animation-delay:.04s;}
.news.animate li:nth-child(2){animation-delay:.12s;}
.news.animate li:nth-child(3){animation-delay:.2s;}
.news.animate li:nth-child(4){animation-delay:.28s;}
.news.animate li:nth-child(5){animation-delay:.36s;}
.news.animate li:nth-child(6){animation-delay:.44s;}
@media (prefers-reduced-motion: reduce){.news.animate li{animation:none;}}

/* Research interests list */
.interests{list-style:none;padding:0;margin:.3rem 0 0;}
.interest{padding:.6rem 0;border-top:1px solid var(--line);}
.interest:first-child{border-top:0;}
.interest .emoji{margin-right:.5rem;}
.interest b{font-weight:600;}
.interest .d{color:var(--muted);}

/* Publications */
.abstract-controls{display:flex;align-items:center;justify-content:flex-end;gap:.6rem;margin:.2rem 0 1.2rem;}
.pub{padding:1.1rem 0;border-top:1px solid var(--line);}
.pub:first-of-type{border-top:0;}
.pub .t{font-weight:600;font-size:1.06rem;margin:0 0 .3rem;line-height:1.4;}
.pub .t a{color:var(--fg);}
.pub .t a:hover{color:var(--accent);}
.pub .meta{color:var(--muted);font-size:.94rem;margin:0 0 .5rem;}
.pub-actions{display:flex;flex-wrap:wrap;gap:.5rem .6rem;align-items:center;margin:0 0 .2rem;}
.abstract-toggle{font-family:inherit;font-size:.82rem;font-weight:600;color:var(--accent);background:var(--accent-soft);border:1px solid var(--accent);border-radius:999px;padding:.22rem .8rem;cursor:pointer;transition:background .15s ease,color .15s ease;}
.abstract-toggle:hover{background:var(--accent);color:#fff;}
.switch-label{font-size:.85rem;font-weight:600;color:var(--muted);}
.switch{position:relative;width:44px;height:24px;border-radius:999px;background:var(--line);border:0;cursor:pointer;padding:0;flex:0 0 auto;transition:background .2s ease;}
.switch .switch-knob{position:absolute;top:3px;left:3px;width:18px;height:18px;border-radius:50%;background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.3);transition:left .2s ease;}
.switch[aria-checked="true"]{background:var(--accent);}
.switch[aria-checked="true"] .switch-knob{left:23px;}
.pub-link{font-size:.85rem;font-weight:600;padding:.22rem .2rem;}
.badge{display:inline-block;font-size:.72rem;font-weight:700;letter-spacing:.07em;text-transform:uppercase;color:#fff;background:var(--accent);padding:.2rem .6rem;border-radius:4px;margin-bottom:.5rem;}
.abstract{display:none;margin:.6rem 0 .2rem;padding:.2rem 0 .2rem 1rem;border-left:2px solid var(--accent);font-size:.96rem;line-height:1.65;color:var(--fg);max-width:90ch;}
.abstract.is-open{display:block;}
.pub--featured .abstract{display:block;}
.more{font-size:.95rem;}

/* Work in progress / under review */
.wip{list-style:none;padding:0;margin:.3rem 0 0;}
.wip li{padding:.6rem 0;border-top:1px solid var(--line);}
.wip li:first-child{border-top:0;}
.wip b{font-weight:600;color:var(--fg);}
.wip .st{color:var(--muted);font-size:.92rem;}

/* Teaching / CV */
.courses,.cv-list{list-style:none;padding:0;margin:0 0 .5rem;}
.courses li{padding:.4rem 0;border-top:1px solid var(--line);}
.courses li:first-child{border-top:0;}
.course{font-weight:600;color:var(--fg);}
.term{color:var(--muted);font-weight:400;font-size:.93rem;}
.cv-list li{padding:.5rem 0;border-top:1px solid var(--line);}
.cv-list li:first-child{border-top:0;}
.inst{color:var(--muted);}
.btn{display:inline-block;background:var(--accent);border:1px solid var(--accent);color:#fff;padding:.5rem 1.1rem;border-radius:5px;font-size:.92rem;font-weight:500;margin:.3rem 0 .5rem;}
.btn:hover{background:var(--accent-hover);border-color:var(--accent-hover);color:#fff;text-decoration:none;}

/* Contact */
.contact-panel{padding-top:.4rem;}
.contact-panel p{margin:0 0 .7rem;}
.contact-panel p:last-child{margin-bottom:0;}

/* QuantBridge */
.qb-hero{margin:0 0 1rem;}
.qb-hero h1{margin:0 0 .6rem;}
.qb-hero p{max-width:74ch;margin:0 0 1rem;}
.qb-deadline{display:inline-block;font-weight:600;font-size:.9rem;color:var(--accent);background:var(--accent-soft);border:1px solid var(--accent);border-radius:999px;padding:.35rem .9rem;}
.qb-stats{display:flex;flex-wrap:wrap;gap:2.5rem;margin:0 0 1.6rem;padding:1.1rem 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.stat .n{font-size:1.7rem;font-weight:700;color:var(--accent);line-height:1;}
.stat .l{color:var(--muted);font-size:.88rem;margin-top:.25rem;}
.phase{font-weight:700;color:var(--fg);font-size:.85rem;text-transform:uppercase;letter-spacing:.05em;margin:1.8rem 0 .8rem;}
.session{padding:.9rem 0;border-top:1px solid var(--line);}
.session h3{margin:0 0 .3rem;font-size:1.05rem;}
.session h3 .m{margin-right:.4rem;}
.session .when{color:var(--muted);font-size:.92rem;margin:0 0 .2rem;}
.session .facil{font-size:.92rem;margin:0;}
.callout{border-left:3px solid var(--accent);background:var(--accent-soft);padding:1rem 1.2rem;border-radius:0 6px 6px 0;margin:1rem 0 1.4rem;}
.callout h3{margin:0 0 .3rem;color:var(--accent);}
.callout p{margin:0;}

/* Videos */
.videos{display:grid;grid-template-columns:repeat(3,1fr);gap:1.2rem;margin-top:.3rem;}
.video{margin:0;}
.video .frame{position:relative;padding-top:56.25%;border:1px solid var(--line);border-radius:6px;overflow:hidden;}
.video .frame iframe{position:absolute;inset:0;width:100%;height:100%;border:0;}
.video figcaption{color:var(--muted);font-size:.9rem;margin-top:.5rem;}

footer{max-width:var(--maxw);margin:0 auto;padding:1.6rem 32px 3rem;border-top:1px solid var(--line);color:var(--muted);font-size:.9rem;}

/* Home two-column layout (Academic CV style) */
.home-grid{display:grid;grid-template-columns:290px 1fr;gap:3rem;align-items:start;}
.sidebar{position:sticky;top:86px;}
.sidebar .avatar{display:block;width:160px;height:160px;border-radius:50%;object-fit:cover;border:1px solid var(--line);margin:0 auto;}
.sidebar .pname{font-size:1.4rem;font-weight:700;text-align:center;margin:1rem 0 .1rem;color:var(--fg);}
.sidebar .prole{text-align:center;font-weight:500;margin:.2rem 0 .1rem;}
.sidebar .porg{text-align:center;color:var(--muted);font-size:.93rem;margin:0 0 .9rem;}
.sidebar .socials{justify-content:center;margin-bottom:1.1rem;}
.sidebar .btn-cv{display:block;text-align:center;}
.side-h{font-size:.76rem;font-weight:700;text-transform:uppercase;letter-spacing:.07em;color:var(--muted);margin:1.6rem 0 .7rem;padding-bottom:.3rem;border-bottom:1px solid var(--line);}
.edu-list{list-style:none;padding:0;margin:0;}
.edu-list li{margin:0 0 .8rem;}
.edu-list .deg{display:block;font-weight:600;font-size:.95rem;color:var(--fg);}
.edu-list .sch{color:var(--muted);font-size:.9rem;}
.edu-list .yr{color:var(--accent);font-size:.82rem;font-weight:600;}
.tags{display:flex;flex-wrap:wrap;gap:.45rem;}
.tag{font-size:.82rem;background:var(--accent-soft);color:var(--accent);border:1px solid var(--line);border-radius:999px;padding:.25rem .75rem;}
.home-main > h2:first-child{margin-top:0;}

/* Green biography hero + page-title banner (HugoBlox academic-cv style) */
.hero-green,.page-hero{
  width:100%;color:#fff;
  background:
    radial-gradient(135% 135% at 88% -25%, rgba(255,255,255,.13) 0%, rgba(255,255,255,0) 42%),
    radial-gradient(120% 120% at 8% 115%, rgba(0,0,0,.18) 0%, rgba(0,0,0,0) 45%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cpath d='M0 0 L70 140 L140 0 Z' fill='%23ffffff' fill-opacity='0.018'/%3E%3Cpath d='M70 140 L140 0 L140 140 Z' fill='%23ffffff' fill-opacity='0.035'/%3E%3Cpath d='M0 0 L0 140 L70 140 Z' fill='%23ffffff' fill-opacity='0.012'/%3E%3Cpath d='M0 140 L70 140 L0 70 Z' fill='%23ffffff' fill-opacity='0.03'/%3E%3C/svg%3E"),
    linear-gradient(135deg,#1e6a4d 0%,#0f3d2d 55%,#092a1f 100%);
}
.page-hero-inner{max-width:1080px;margin:0 auto;padding:2.1rem 32px;}
.page-hero h1{color:#fff;margin:0;font-size:2rem;}
.page-hero p{color:rgba(255,255,255,.85);margin:.45rem 0 0;max-width:72ch;}
.hero-inner{max-width:1120px;margin:0 auto;padding:2.8rem 32px;display:grid;grid-template-columns:250px 1fr;gap:2.8rem;align-items:start;}
.hero-left{text-align:center;}
.hero-left .avatar{width:200px;height:200px;border-radius:50%;object-fit:cover;border:4px solid rgba(255,255,255,.85);box-shadow:0 8px 22px rgba(0,0,0,.3);}
.hero-left .pname{font-size:1.45rem;font-weight:800;margin:1rem 0 .1rem;color:#fff;letter-spacing:-.01em;}
.hero-left .prole{font-weight:600;margin:.5rem 0 .05rem;color:#fff;}
.hero-left .pfield{font-weight:500;font-size:.98rem;color:rgba(255,255,255,.92);margin:.05rem 0 .15rem;}
.hero-left .porg{color:rgba(255,255,255,.78);font-size:.9rem;margin:.05rem 0 1rem;}
.hero-left .socials{display:grid;grid-template-columns:repeat(4,auto);justify-content:center;gap:14px 20px;}
.hero-left .socials a{color:#fff;font-size:1.2rem;}
.hero-left .socials a:hover{color:rgba(255,255,255,.72);text-decoration:none;}
.hero-right h2{color:#fff;border:0;padding:0;margin:.2rem 0 .8rem;font-size:1.7rem;}
.hero-right > p{color:rgba(255,255,255,.92);max-width:64ch;}
/* "On the job market" status badge with pulsing dot */
.jobmarket{display:inline-flex;align-items:center;gap:.55rem;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.28);color:#fff;font-size:.8rem;font-weight:600;padding:.34rem .8rem;border-radius:999px;margin:.1rem 0 1rem;}
.jm-dot{position:relative;width:9px;height:9px;border-radius:50%;background:#ffd166;flex:0 0 auto;}
.jm-dot::after{content:"";position:absolute;inset:0;border-radius:50%;background:#ffd166;animation:jmPing 1.9s cubic-bezier(0,0,.2,1) infinite;}
@keyframes jmPing{0%{transform:scale(1);opacity:.75;}80%,100%{transform:scale(2.8);opacity:0;}}
@media (prefers-reduced-motion: reduce){.jm-dot::after{animation:none;}}
.hero-cv{display:inline-flex;align-items:center;gap:.5rem;background:rgba(0,0,0,.22);border:1px solid rgba(255,255,255,.32);color:#fff;padding:.55rem 1.15rem;border-radius:7px;font-weight:600;font-size:.92rem;margin:.3rem 0 .2rem;}
.hero-cv:hover{background:rgba(0,0,0,.36);color:#fff;text-decoration:none;}
.hero-actions{display:flex;flex-wrap:wrap;gap:.7rem;margin:.5rem 0 .2rem;}
.hero-actions .hero-cv{margin:0;}
.hero-right p a{color:#fff;text-decoration:underline;text-underline-offset:2px;}
.hero-right p a:hover{color:rgba(255,255,255,.8);}
.hero-facts{display:grid;grid-template-columns:1fr 1fr;gap:2.2rem;margin-top:1.8rem;}
.hero-facts h4{color:#fff;font-size:1.15rem;font-weight:700;margin:0 0 .8rem;}
.hero-facts .interest-list{margin:0;padding-left:1.15rem;}
.hero-facts .interest-list li{color:#fff;margin:.3rem 0;}
.area-chips{display:flex;flex-direction:column;gap:.5rem;}
.area-chip{position:relative;display:block;background:rgba(255,255,255,.06);border-left:3px solid #ffd166;border-radius:0 8px 8px 0;padding:.55rem .9rem;color:#fff;font-size:.93rem;font-weight:500;overflow:hidden;transition:background .18s ease,padding-left .18s ease,border-color .18s ease;}
.area-chip::before{content:"";position:absolute;left:0;top:0;bottom:0;width:0;background:rgba(255,209,102,.16);transition:width .25s ease;z-index:0;}
.area-chip:hover::before{width:100%;}
.area-chip:hover{padding-left:1.15rem;border-left-color:#ffe08a;}
.area-chip span,.area-chip{position:relative;}
.area-chip > *{position:relative;z-index:1;}
.hero-edu{list-style:none;padding:0;margin:0;}
.hero-edu li{display:flex;gap:.65rem;margin:0 0 .8rem;}
.hero-edu .cap{color:rgba(255,255,255,.8);margin-top:.2rem;flex:0 0 auto;}
.hero-edu .deg{display:block;color:#fff;font-weight:600;font-size:.98rem;}
.hero-edu .sch{color:rgba(255,255,255,.75);font-size:.9rem;}

@media(max-width:820px){
  .site-header .bar,main,footer{padding-left:20px;padding-right:20px;}
  .videos{grid-template-columns:1fr;}
  .profile__side{flex-basis:auto;width:100%;}
  .home-grid{grid-template-columns:1fr;gap:2rem;}
  .sidebar{position:static;}
  .hero-inner{grid-template-columns:1fr;gap:1.6rem;padding:2rem 20px;}
  .hero-facts{grid-template-columns:1fr;gap:1.4rem;}
  .page-hero-inner{padding:1.7rem 20px;}
}
@media(max-width:600px){
  h1{font-size:1.85rem;}
}