/* =====================================================================
   Stewart Lab — shared styles for every page.
   COLORS live in :root below. Change a hex here and the whole site updates.
   ===================================================================== */
:root{
  --plum:        #2B1B3D;
  --purple:      #6E3FA3;
  --purple-soft: #8B5CC7;
  --teal:        #0E9C92;
  --teal-bright: #1FB8AE;
  --bg:          #FBFAFD;
  --panel:       #F3EEF8;
  --panel-teal:  #E6F5F3;
  --text:        #3C3548;
  --muted:       #756E83;
  --line:        #E6DFEE;
  --maxw: 1080px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{margin:0; background:var(--bg); color:var(--text);
  font-family:"Inter",system-ui,sans-serif; font-size:17px; line-height:1.65;
  -webkit-font-smoothing:antialiased;}
h1,h2,h3{font-family:"Fraunces",Georgia,serif; color:var(--plum); font-weight:600; line-height:1.12; margin:0;}
a{color:var(--purple); text-decoration:none;}
a:hover{text-decoration:underline;}
em{font-style:italic;}
strong{color:var(--plum);}
.wrap{max-width:var(--maxw); margin:0 auto; padding:0 28px;}
.eyebrow{font-family:"Space Mono",monospace; font-size:12.5px; letter-spacing:.14em;
  text-transform:uppercase; color:var(--teal); margin:0 0 14px;}

/* ---------- nav ---------- */
header{position:sticky; top:0; z-index:50; background:rgba(251,250,253,.88);
  backdrop-filter:saturate(140%) blur(8px); border-bottom:1px solid var(--line);}
.nav{display:flex; align-items:center; justify-content:space-between; height:66px;}
.brand{display:flex; align-items:center; gap:11px; font-family:"Fraunces",serif;
  font-weight:600; font-size:19px; color:var(--plum);}
.brand:hover{text-decoration:none;}
.mark{width:26px; height:26px; flex:0 0 auto;}
.menu{display:flex; gap:24px; list-style:none; margin:0; padding:0;}
.menu a{color:var(--plum); font-size:15px; font-weight:500; padding:4px 0; border-bottom:2px solid transparent;}
.menu a:hover{color:var(--purple); text-decoration:none;}
.menu a.active{color:var(--purple); border-bottom-color:var(--teal-bright);}
.navtoggle{display:none; background:none; border:0; cursor:pointer; padding:8px;}
.navtoggle span{display:block; width:22px; height:2px; background:var(--plum); margin:4px 0;}

/* ---------- buttons ---------- */
.btn{display:inline-block; font-weight:600; font-size:15px; padding:13px 22px; border-radius:999px;
  transition:transform .15s ease, box-shadow .15s ease, border-color .15s ease, color .15s ease;}
.btn-primary{background:var(--purple); color:#fff;}
.btn-primary:hover{text-decoration:none; transform:translateY(-2px); box-shadow:0 8px 22px rgba(110,63,163,.28);}
.btn-ghost{color:var(--plum); border:1.5px solid var(--line);}
.btn-ghost:hover{text-decoration:none; border-color:var(--teal); color:var(--teal);}

/* ---------- hero (home) ---------- */
.hero{padding:78px 0 60px; overflow:hidden;}
.hero-grid{display:grid; grid-template-columns:1.05fr .95fr; gap:46px; align-items:center;}
.hero h1{font-size:clamp(40px,5.8vw,68px); letter-spacing:-.01em;}
.hero h1 .accent{color:var(--purple);}
.hero .lead{font-size:20px; max-width:36ch; margin:22px 0 30px;}
.cta-row{display:flex; gap:14px; flex-wrap:wrap;}
.ribbon-art{width:100%; height:auto; filter:drop-shadow(0 14px 30px rgba(43,27,61,.12));}

/* ---------- subhero (interior pages) ---------- */
.subhero{padding:64px 0 26px;}
.subhero .bar{width:64px; height:4px; border-radius:3px;
  background:linear-gradient(90deg,var(--purple),var(--teal-bright)); margin-bottom:22px;}
.subhero h1{font-size:clamp(34px,5vw,52px); letter-spacing:-.01em; max-width:18ch;}
.subhero p{font-size:20px; color:var(--muted); max-width:60ch; margin:18px 0 0;}

/* ---------- sections ---------- */
.section{padding:50px 0;}
.section-head{max-width:62ch; margin-bottom:32px;}
.section-head h2{font-size:clamp(26px,3.6vw,38px);}
.section-head p{color:var(--muted); margin:14px 0 0;}
.prose p{max-width:64ch;}
.prose p + p{margin-top:18px;}
.pull{font-family:"Fraunces",serif; font-size:clamp(23px,3vw,32px); color:var(--plum);
  border-left:4px solid var(--teal-bright); padding-left:22px; margin:34px 0; max-width:26ch; line-height:1.25;}

/* ---------- quick links (home) ---------- */
.quick{display:grid; grid-template-columns:repeat(3,1fr); gap:22px;}
.qcard{display:block; background:#fff; border:1px solid var(--line); border-radius:16px; padding:26px 24px;
  color:var(--text); transition:transform .18s ease, box-shadow .18s ease;}
.qcard:hover{text-decoration:none; transform:translateY(-3px); box-shadow:0 14px 34px rgba(43,27,61,.09);}
.qcard h3{font-size:21px; margin:0 0 8px;}
.qcard p{margin:0; font-size:15.5px; color:var(--muted);}
.qcard .go{display:inline-block; margin-top:14px; font-family:"Space Mono",monospace; font-size:13px; color:var(--purple);}

/* ---------- approach rows ---------- */
.approach{display:grid; grid-template-columns:1fr 1fr; gap:56px; align-items:center; margin-top:54px;}
.approach:first-of-type{margin-top:0;}
.approach.flip .copy{order:2;}
.approach .label{font-family:"Space Mono",monospace; font-size:13px; color:var(--teal); letter-spacing:.1em;}
.approach h3{font-size:26px; margin:8px 0 14px;}
.approach p{margin:0;}
.approach p + p{margin-top:14px;}

/* ---------- image slot ---------- */
.ph{position:relative; margin:0; width:100%; aspect-ratio:4/3; border-radius:16px; overflow:hidden;
  background:linear-gradient(135deg,var(--panel),var(--panel-teal));
  border:1.5px dashed var(--purple-soft); display:flex; align-items:center; justify-content:center;}
.ph.tall{aspect-ratio:3/4;}
.ph img{position:absolute; inset:0; width:100%; height:100%; object-fit:cover;}
.ph .ph-label{font-family:"Space Mono",monospace; font-size:12.5px; color:var(--purple);
  text-align:center; padding:0 16px; line-height:1.5;}
.ph .ph-label b{display:block; color:var(--plum); margin-bottom:4px; font-weight:700;}

/* ---------- techniques ---------- */
.tech{background:var(--panel); border-radius:20px; padding:40px 36px;}
.tags{display:flex; flex-wrap:wrap; gap:10px; margin-top:12px;}
.tag{font-family:"Space Mono",monospace; font-size:13px; background:#fff; border:1px solid var(--line);
  color:var(--plum); padding:7px 13px; border-radius:8px;}

/* ---------- people ---------- */
.people-grid{display:grid; grid-template-columns:280px 1fr; gap:48px; align-items:start;}
.bio h2{font-size:26px; margin:0 0 4px;}
.bio .role{font-family:"Space Mono",monospace; font-size:12.5px; color:var(--teal);
  text-transform:uppercase; letter-spacing:.08em; margin:0 0 16px;}

/* ---------- lists / publications ---------- */
.list{list-style:none; margin:0; padding:0;}
.list li{padding:18px 0; border-bottom:1px solid var(--line);}
.list li:last-child{border-bottom:0;}
.list .where{font-family:"Space Mono",monospace; font-size:12px; color:var(--teal);
  text-transform:uppercase; letter-spacing:.08em;}
.list .what{display:block; color:var(--plum); font-weight:500; margin-top:3px; font-size:17px;}

.pub{padding:30px 0; border-bottom:1px solid var(--line);}
.pub:last-child{border-bottom:0;}
.pub .venue{font-family:"Space Mono",monospace; font-size:12px; color:var(--teal);
  text-transform:uppercase; letter-spacing:.08em;}
.pub h2{font-size:24px; margin:8px 0 6px; max-width:40ch;}
.pub .cite{font-size:14.5px; color:var(--muted); margin:0 0 16px;}
.pub .plain{display:grid; grid-template-columns:repeat(3,1fr); gap:18px; margin:0 0 16px;}
.pub .plain h4{font-family:"Space Mono",monospace; font-size:12px; letter-spacing:.06em; text-transform:uppercase;
  color:var(--purple); margin:0 0 6px;}
.pub .plain p{margin:0; font-size:15.5px;}

/* ---------- join band ---------- */
.join{background:linear-gradient(120deg,var(--plum),var(--purple)); border-radius:22px; color:#fff;
  padding:52px 44px; display:flex; align-items:center; justify-content:space-between; gap:30px; flex-wrap:wrap;}
.join h2{color:#fff; font-size:clamp(26px,3.4vw,36px); max-width:18ch;}
.join p{color:#E9DDF5; margin:10px 0 0; max-width:46ch;}
.join .btn-primary{background:var(--teal-bright); color:var(--plum);}
.join .btn-primary:hover{box-shadow:0 8px 22px rgba(31,184,174,.35);}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--line); padding:46px 0 60px; margin-top:30px;}
.foot-grid{display:flex; justify-content:space-between; gap:30px; flex-wrap:wrap;}
footer .brand{margin-bottom:10px;}
.muted{color:var(--muted); font-size:15px;}
.foot-links{list-style:none; margin:0; padding:0; display:flex; gap:22px; flex-wrap:wrap;}
.foot-links a{color:var(--plum); font-size:15px;}

/* ---------- reveal ---------- */
.reveal{opacity:0; transform:translateY(16px); transition:opacity .6s ease, transform .6s ease;}
.reveal.in{opacity:1; transform:none;}

/* ---------- photo gallery ---------- */
.gallery{display:grid; grid-template-columns:repeat(auto-fill,minmax(240px,1fr)); gap:22px;}
.shot{margin:0;}
.shot-btn{display:block; width:100%; padding:0; border:0; background:none; cursor:zoom-in;
  border-radius:14px; overflow:hidden; line-height:0;}
.shot-btn img{width:100%; aspect-ratio:4/3; object-fit:cover; display:block; transition:transform .35s ease;}
.shot-btn:hover img{transform:scale(1.04);}
.shot-btn:focus-visible{outline:3px solid var(--teal-bright); outline-offset:2px;}
.shot figcaption{font-size:14px; color:var(--muted); margin-top:11px; line-height:1.45;}

/* ---------- lightbox ---------- */
.lightbox{position:fixed; inset:0; z-index:100; display:none; align-items:center; justify-content:center;
  background:rgba(20,12,28,.93); padding:28px;}
.lightbox.open{display:flex;}
.lb-figure{margin:0; max-width:1100px; width:100%; text-align:center;}
.lb-figure img{max-width:100%; max-height:78vh; border-radius:12px; box-shadow:0 20px 60px rgba(0,0,0,.5);}
.lb-figure figcaption{color:#EDE7F3; font-size:15.5px; line-height:1.5; margin:16px auto 0; max-width:62ch;}
.lb-close,.lb-prev,.lb-next{position:absolute; background:rgba(255,255,255,.13); color:#fff; border:0;
  cursor:pointer; border-radius:999px; width:48px; height:48px; font-size:26px; line-height:1;
  display:flex; align-items:center; justify-content:center; transition:background .15s ease;}
.lb-close:hover,.lb-prev:hover,.lb-next:hover{background:rgba(255,255,255,.28);}
.lb-close:focus-visible,.lb-prev:focus-visible,.lb-next:focus-visible{outline:2px solid var(--teal-bright); outline-offset:2px;}
.lb-close{top:20px; right:20px;}
.lb-prev{left:20px; top:50%; transform:translateY(-50%);}
.lb-next{right:20px; top:50%; transform:translateY(-50%);}
@media(max-width:560px){ .lb-prev{left:10px;} .lb-next{right:10px;} .lb-close{top:12px; right:12px;} }

/* ---------- responsive ---------- */
@media(max-width:840px){
  .hero-grid{grid-template-columns:1fr; gap:30px;}
  .ribbon-art{max-width:440px;}
  .quick{grid-template-columns:1fr;}
  .approach,.approach.flip{grid-template-columns:1fr; gap:30px;}
  .approach.flip .copy{order:0;}
  .people-grid{grid-template-columns:1fr; gap:30px;}
  .pub .plain{grid-template-columns:1fr; gap:12px;}
  .menu{display:none; position:absolute; top:66px; left:0; right:0; background:var(--bg);
    flex-direction:column; gap:0; padding:8px 0; border-bottom:1px solid var(--line);}
  .menu.open{display:flex;}
  .menu li{padding:0 28px;}
  .menu a{display:block; padding:12px 0; border-bottom:0;}
  .navtoggle{display:block;}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .reveal{opacity:1; transform:none; transition:none;}
  .shot-btn img{transition:none;}
}