/* ============================================================
   Eliasse TIAO — Portfolio design system
   Palette: Paper #FBFAF7 · Ink #14171C · Indigo #26418F
            Ochre #B4690E · Slate #5C6470 · Line #E4E1D8
   Type:    Fraunces (display) · Public Sans (body) · IBM Plex Mono (data)
   Signature: the "interval band" — P10/P50/P90 stripes
   ============================================================ */

:root{
  --paper:#FBFAF7;
  --ink:#0A0C0F;
  --indigo:#26418F;
  --indigo-soft:rgba(38,65,143,.12);
  --indigo-mid:rgba(38,65,143,.42);
  --indigo-bg:rgba(38,65,143,.06);
  --ochre:#B4690E;
  --ochre-soft:rgba(180,105,14,.12);
  --slate:#5C6470;
  --line:#E4E1D8;
  --card:#FFFFFF;
  --display:'Fraunces',serif;
  --body:'Public Sans',sans-serif;
  --mono:'IBM Plex Mono',monospace;
  --max:1080px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--paper);color:var(--ink);font-family:var(--body);font-size:16.5px;line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:var(--indigo);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:3px}
:focus-visible{outline:2px solid var(--indigo);outline-offset:3px;border-radius:2px}
img{max-width:100%}

/* ---------- Signature: interval band ---------- */
.band{display:flex;height:6px;width:88px;border-radius:3px;overflow:hidden;margin:1.1rem 0 0}
.band i{display:block;height:100%}
.band .p10{width:22%;background:var(--indigo-soft)}
.band .p50{width:56%;background:var(--indigo)}
.band .p90{width:22%;background:var(--indigo-mid)}
.band.wide{width:150px;height:8px}

/* ---------- Layout ---------- */
.wrap{max-width:var(--max);margin:0 auto;padding:0 28px}
main{min-height:70vh}
section{padding:3.4rem 0}
section+section{border-top:1px solid var(--line)}

/* ---------- Nav ---------- */
header.site{border-bottom:1px solid var(--line);background:var(--paper);position:sticky;top:0;z-index:50;backdrop-filter:blur(8px);background:rgba(251,250,247,.95)}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px;gap:1rem}
.brand{font-family:var(--display);font-weight:600;font-size:1.15rem;color:var(--ink);letter-spacing:.01em}
.brand:hover{text-decoration:none}
.nav ul{display:flex;gap:1.4rem;list-style:none;flex-wrap:wrap}
.nav a.link{font-size:.86rem;color:var(--slate);letter-spacing:.02em;padding:.35rem 0;position:relative}
.nav a.link:hover{color:var(--ink);text-decoration:none}
.nav a.link[aria-current="page"]{color:var(--ink)}
.nav a.link[aria-current="page"]::after{content:"";position:absolute;left:0;right:0;bottom:-4px;height:4px;border-radius:2px;
  background:linear-gradient(90deg,var(--indigo-soft) 0 22%,var(--indigo) 22% 78%,var(--indigo-mid) 78% 100%)}

/* ---------- Type ---------- */
h1,h2,h3{font-family:var(--display);font-weight:600;line-height:1.12;letter-spacing:-.01em}
h1{font-size:clamp(2.3rem,5.4vw,3.6rem)}
h2{font-size:clamp(1.55rem,3vw,2.1rem)}
h3{font-size:1.12rem}
.kicker{font-family:var(--mono);font-size:.74rem;letter-spacing:.14em;text-transform:uppercase;color:var(--ochre)}
.lede{font-size:1.12rem;color:var(--slate);max-width:62ch;margin-top:1.1rem}
.muted{color:var(--slate)}
.mono{font-family:var(--mono);font-size:.8rem}

/* ---------- Buttons ---------- */
.btns{display:flex;gap:.8rem;flex-wrap:wrap;margin-top:1.8rem}
.btn{display:inline-flex;align-items:center;gap:.45rem;padding:.68rem 1.25rem;border-radius:6px;
  font-family:var(--body);font-weight:600;font-size:.92rem;border:1.5px solid transparent;transition:transform .15s,box-shadow .15s}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-solid{background:var(--indigo);color:#fff}
.btn-solid:hover{box-shadow:0 6px 18px rgba(38,65,143,.28)}
.btn-line{border-color:var(--ink);color:var(--ink)}
.btn-line:hover{background:var(--ink);color:var(--paper)}
.btn-quiet{color:var(--indigo);padding-left:.2rem}

/* ---------- Chips / tags ---------- */
.chips{display:flex;gap:.55rem;flex-wrap:wrap;margin-top:1.4rem}
.chip{font-family:var(--mono);font-size:.74rem;color:var(--ink);background:var(--card);
  border:1px solid var(--line);border-radius:20px;padding:.34rem .8rem}
.chip strong{color:var(--indigo);font-weight:600}
.tags{display:flex;gap:.4rem;flex-wrap:wrap;margin-top:.9rem}
.tag{font-family:var(--mono);font-size:.68rem;color:var(--indigo);background:var(--indigo-soft);
  border-radius:4px;padding:.18rem .5rem}

/* ---------- Status badges ---------- */
.badge{font-family:var(--mono);font-size:.68rem;font-weight:600;letter-spacing:.06em;
  border-radius:4px;padding:.22rem .55rem;white-space:nowrap}
.badge.pub{background:var(--ochre-soft);color:var(--ochre)}
.badge.acc{background:var(--indigo-soft);color:var(--indigo)}
.badge.rev{background:#EFEFEA;color:var(--slate)}

/* ---------- Hero stats bar (proof) ---------- */
.proof-bar{display:flex;gap:1rem;justify-content:space-between;align-items:stretch;background:var(--indigo);border-radius:12px;padding:1.4rem 1.6rem;margin:2rem 0 2.2rem;flex-wrap:wrap}
.proof-item{display:flex;flex-direction:column;align-items:center;gap:.25rem;color:var(--paper);flex:1;min-width:90px}
.proof-stat{font-family:var(--display);font-size:1.65rem;font-weight:600;color:#FFFFFF;letter-spacing:-.01em}
.proof-label{font-family:var(--mono);font-size:.68rem;letter-spacing:.05em;text-transform:uppercase;color:rgba(255,255,255,.8)}

/* ---------- CTA primary ---------- */
.cta-primary{margin:2.2rem 0 1.6rem}
.cta-primary .btn{width:100%;text-align:center;padding:.9rem 1.5rem;font-size:1.05rem}

.btns-secondary{display:flex;gap:.8rem;flex-wrap:wrap;margin-top:1.2rem}

/* ---------- Cards ---------- */
.grid{display:grid;gap:1.3rem;margin-top:2rem}
.grid.cols-3{grid-template-columns:repeat(3,1fr)}
.grid.cols-2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--card);border:2px solid var(--line);border-radius:10px;padding:1.6rem;
  transition:transform .22s cubic-bezier(.34,.1,.68,.55),box-shadow .22s,border-color .22s}
.card:hover{transform:translateY(-6px);box-shadow:0 20px 40px rgba(38,65,143,.15);border-color:var(--indigo)}
.card h3{margin-bottom:.35rem}
.card .sub{font-family:var(--mono);font-size:.72rem;color:var(--slate);margin-bottom:.7rem}
.card p{font-size:.93rem;color:var(--slate)}
.card .impact{font-size:.95rem;color:var(--ink);font-weight:600;margin:.6rem 0 .2rem}

/* Spotlight cards (top projects) */
.card-spotlight{border-width:2.5px;border-color:var(--indigo);background:linear-gradient(135deg,rgba(251,250,247,1) 0%,rgba(38,65,143,.04) 100%)}
.card-spotlight:hover{box-shadow:0 24px 48px rgba(38,65,143,.18)}

/* ---------- Publication rows ---------- */
.pub{background:var(--card);border:2px solid var(--line);border-radius:10px;padding:1.8rem;margin-top:1.2rem;
  transition:transform .22s,box-shadow .22s,border-color .22s}
.pub:hover{transform:translateY(-4px);box-shadow:0 16px 36px rgba(38,65,143,.1);border-color:var(--indigo-soft)}
.pub h3{font-size:1.08rem;line-height:1.35;margin:.8rem 0 .45rem}
.pub-header{display:flex;justify-content:space-between;gap:1rem;align-items:flex-start;margin-bottom:.5rem;flex-wrap:wrap}
.pub-header .venue{font-family:var(--mono);font-size:.72rem;color:var(--slate);margin-bottom:0}
.pub .authors{font-size:.85rem;color:var(--slate);margin:.35rem 0 .6rem}
.pub .authors b{color:var(--ink);font-weight:600}
.pub-impact{background:var(--indigo-bg);border-left:3px solid var(--indigo);padding:.9rem 1.1rem;border-radius:6px;margin:.8rem 0}
.pub-impact p{font-size:.92rem;color:var(--ink);margin:0}
.pub p.abs{font-size:.92rem;color:var(--slate);margin:.8rem 0}
.pub .links{margin-top:.9rem;display:flex;gap:1.2rem;flex-wrap:wrap;font-size:.86rem}

.pub-pub{border-color:var(--ochre-soft)}
.pub-pub:hover{border-color:var(--ochre);box-shadow:0 16px 36px rgba(180,105,14,.08)}
.pub-acc{border-color:var(--indigo-soft)}
.pub-acc:hover{border-color:var(--indigo);box-shadow:0 16px 36px rgba(38,65,143,.12)}
.pub-rev{border-color:#E8E5DC}
.pub-rev:hover{border-color:var(--slate);box-shadow:0 16px 36px rgba(92,100,112,.08)}

.card-award{border:2px solid var(--line)}
.card-award:hover{border-color:var(--ochre);box-shadow:0 16px 40px rgba(180,105,14,.12)}
.card-award .sub{color:var(--ochre);font-weight:600}
.award-detail{font-family:var(--mono);font-size:.73rem;color:var(--slate);margin:.5rem 0 .6rem;text-transform:uppercase;letter-spacing:.02em}

/* ---------- Timeline ---------- */
.tl{position:relative;margin-top:2rem;padding-left:1.6rem}
.tl::before{content:"";position:absolute;left:5px;top:6px;bottom:6px;width:2px;
  background:linear-gradient(180deg,var(--indigo),var(--indigo-mid) 70%,transparent)}
.tl-item{position:relative;padding:0 0 2.2rem 1.2rem}
.tl-item::before{content:"";position:absolute;left:-1.6rem;top:.42rem;width:12px;height:12px;border-radius:50%;
  background:var(--paper);border:3px solid var(--indigo)}
.tl-item.gold::before{border-color:var(--ochre)}
.tl-date{font-family:var(--mono);font-size:.74rem;color:var(--ochre)}
.tl-role{font-family:var(--display);font-weight:600;font-size:1.08rem;margin:.15rem 0 .05rem}
.tl-org{font-size:.9rem;color:var(--slate);margin-bottom:.5rem}
.tl-item ul{list-style:none}
.tl-item li{font-size:.92rem;color:var(--slate);padding:.14rem 0 .14rem 1rem;position:relative}
.tl-item li::before{content:"—";position:absolute;left:0;color:var(--indigo-mid)}

.tl-impact{font-size:.95rem;color:var(--ochre);font-weight:600;margin:.3rem 0 .6rem;display:flex;align-items:baseline;gap:.4rem}

.tl-sig{font-size:.93rem;color:var(--ink);font-weight:500;margin:.4rem 0 .7rem;padding:.7rem .9rem;background:var(--indigo-bg);border-radius:6px;border-left:3px solid var(--indigo)}

/* ---------- Skill groups ---------- */
.skillgroup{margin-top:1.6rem}
.skillgroup h3{font-size:.95rem;margin-bottom:.5rem}
.skillgroup .tags{margin-top:.2rem}

/* ---------- Definition rows (contact) ---------- */
.deflist{margin-top:1.6rem;display:grid;gap:.9rem}
.defrow{display:grid;grid-template-columns:160px 1fr;gap:1rem;padding:.9rem 0;border-bottom:1px solid var(--line)}
.defrow dt{font-family:var(--mono);font-size:.76rem;letter-spacing:.06em;text-transform:uppercase;color:var(--slate);padding-top:.15rem}
.defrow dd{font-size:1rem}
.defrow dd .note{display:block;font-size:.82rem;color:var(--slate)}

/* ---------- Callout ---------- */
.callout{background:var(--card);border:1px solid var(--line);border-left:4px solid var(--ochre);
  border-radius:8px;padding:1.2rem 1.4rem;margin-top:2rem;font-size:.95rem;color:var(--slate)}
.callout b{color:var(--ink)}

/* ---------- Footer ---------- */
footer.site{border-top:1px solid var(--line);margin-top:3rem;padding:2.2rem 0}
.foot{display:flex;justify-content:space-between;align-items:center;gap:1rem;flex-wrap:wrap}
.foot .links{display:flex;gap:1.2rem;flex-wrap:wrap;font-size:.86rem}
.foot small{color:var(--slate);font-size:.8rem}

/* ---------- Reveal (motion-safe only) ---------- */
@media (prefers-reduced-motion: no-preference){
  .reveal{opacity:0;transform:translateY(16px);transition:opacity .55s ease,transform .55s ease}
  .reveal.in{opacity:1;transform:none}
}

/* ---------- Responsive ---------- */
@media(max-width:900px){
  .grid.cols-3{grid-template-columns:1fr 1fr}
  .proof-bar{flex-direction:row;gap:.8rem}
  .proof-item{min-width:70px}
  .proof-stat{font-size:1.4rem}
}
@media(max-width:660px){
  body{font-size:15.5px}
  .grid.cols-3,.grid.cols-2{grid-template-columns:1fr}
  .nav{height:auto;padding:.8rem 0;flex-direction:column;align-items:flex-start;gap:.5rem}
  .defrow{grid-template-columns:1fr;gap:.15rem}
  .proof-bar{gap:.6rem;padding:1.1rem 1.2rem;flex-wrap:wrap}
  .proof-item{flex:1 1 45%}
  .proof-stat{font-size:1.2rem}
  .proof-label{font-size:.62rem}
  .cta-primary .btn{font-size:.95rem;padding:.8rem 1.2rem}
  section{padding:2.6rem 0}
}