/* ISARS 2026 SEOUL — poster identity (ivory · wine · bronze · gold) */
:root{
  --bg:#f6f1e9; --paper:#fffdf8; --ink:#2b2118; --bronze:#8a6a45;
  --wine:#8f2433; --wine-soft:#a8394a; --gold:#c2a04e; --smoke:#9a8b75;
  --border:#e3d9c8; --panel-bg:#f8efd9; --session-bg:#fffdf8; --shadow:rgba(43,33,24,.10);
  --indiv-bd:#a2ad88; --break:#4e6b3f; --event:#fbfaf7; --event-bd:#e2d7c9;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{background:var(--bg);color:var(--ink);font-family:'Inter','Noto Sans KR',sans-serif;
  font-size:15px;line-height:1.55;-webkit-font-smoothing:antialiased;}
a{color:inherit;text-decoration:none;}

/* ===== HEADER ===== */
header{background:linear-gradient(135deg,#2b2118,#3a2a1c);color:#f6f1e9;text-align:center;
  padding:46px 20px 38px;position:relative;}
header.compact{padding:28px 20px 24px;}
.hd-eyebrow{font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--gold);margin-bottom:24px;}
header h1{font-family:'Cinzel',serif;font-weight:600;letter-spacing:.14em;
  font-size:clamp(26px,4.2vw,42px);color:#ffffff;text-transform:uppercase;line-height:1.06;}
header.compact h1{font-size:clamp(20px,2.9vw,32px);}
.hd-theme{font-family:'Bodoni Moda','EB Garamond',serif;font-weight:600;font-style:normal;
  font-size:clamp(19px,3vw,31px);line-height:1.12;color:var(--gold);margin-top:12px;letter-spacing:-.007em;}
header.compact .hd-theme{font-size:clamp(14px,2.1vw,22px);margin-top:6px;}
.hd-tagline{font-family:'EB Garamond',serif;font-style:italic;font-size:clamp(14px,1.8vw,17px);color:var(--gold);margin-top:12px;}
.hd-meta{font-size:13px;color:#cbbfa8;margin-top:14px;letter-spacing:.02em;}
header.compact .hd-tagline,header.compact .hd-meta{margin-top:6px;}

/* ===== NAV ===== */
nav{position:sticky;top:0;z-index:50;background:rgba(246,241,233,.94);
  backdrop-filter:blur(6px);border-bottom:1px solid var(--border);box-shadow:0 1px 0 var(--gold);}
.nav-inner{max-width:1180px;margin:0 auto;display:flex;gap:4px;flex-wrap:wrap;justify-content:center;padding:8px 16px;}
nav a{font-size:13px;font-weight:500;color:var(--bronze);padding:7px 15px;border-radius:18px;transition:.18s;}
nav a:hover{background:var(--panel-bg);color:var(--wine);}
nav a.cur{background:var(--wine);color:#fff;}

/* ===== SEARCH ===== */
.search-wrap{position:relative;max-width:760px;margin:20px auto 0;padding:0 20px;}
.search-input{width:100%;font-family:'Inter','Noto Sans KR',sans-serif;font-size:15px;
  padding:13px 18px;border:1.5px solid var(--border);border-radius:26px;background:var(--paper);
  color:var(--ink);box-shadow:0 2px 10px var(--shadow);outline:none;transition:.18s;}
.search-input:focus{border-color:var(--wine);box-shadow:0 4px 16px rgba(143,36,51,.14);}
.search-input::placeholder{color:var(--smoke);}
.search-results{display:none;position:absolute;left:20px;right:20px;top:54px;z-index:60;
  background:var(--paper);border:1px solid var(--border);border-radius:14px;
  box-shadow:0 16px 40px rgba(43,33,24,.18);max-height:60vh;overflow-y:auto;}
.search-results.open{display:block;}
.sr{display:block;padding:11px 18px;border-bottom:1px solid var(--border);transition:.12s;}
.sr:last-child{border-bottom:none;}
.sr:hover{background:rgba(143,36,51,.06);}
.sr-n{display:block;font-weight:600;font-size:14px;color:var(--ink);}
.sr-t{display:block;font-family:'EB Garamond',serif;font-size:13.5px;color:var(--ink);margin:1px 0 2px;}
.sr-m{display:block;font-size:11.5px;color:var(--bronze);letter-spacing:.01em;}
.sr-none{padding:16px 18px;color:var(--smoke);font-size:13px;}

/* ===== LAYOUT WRAP ===== */
.intro,.ov-day,.day-hero,.slot-group,.plenary-list,.sec-h,.tt-wrap{max-width:1180px;margin-left:auto;margin-right:auto;}
.intro{padding:22px 20px 6px;color:var(--bronze);}
.sec-h{font-family:'EB Garamond',serif;font-size:20px;color:var(--wine);font-weight:600;
  padding:26px 20px 6px;letter-spacing:.01em;}

/* ===== OVERVIEW ===== */
.ov-day{padding:18px 20px 34px;}
.ov-dayhd a{display:flex;align-items:baseline;gap:16px;padding:10px 0 14px;border-bottom:2px solid var(--wine);}
.ov-num{font-family:'Cinzel',serif;font-size:38px;font-weight:700;color:var(--wine);}
.ov-wd{font-family:'EB Garamond',serif;font-size:28px;font-weight:600;color:var(--ink);}
.ov-sub{font-size:14px;letter-spacing:.06em;text-transform:uppercase;color:var(--bronze);margin-left:auto;}
.ov-dayhd a:hover .ov-wd{color:var(--wine);}

/* ===== DAY HERO ===== */
.day-hero{display:flex;align-items:center;gap:18px;padding:24px 20px 4px;}
.day-num-big{font-family:'Cinzel',serif;font-size:54px;font-weight:700;color:var(--wine);line-height:1;}
.day-hero h2{font-family:'EB Garamond',serif;font-size:26px;font-weight:600;color:var(--ink);}
.day-date{font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--bronze);margin-top:3px;}

/* ===== TIMETABLE (room × time grid) ===== */
.ttg-wrap{overflow-x:auto;padding:4px 20px;max-width:1180px;margin:0 auto;}
.ttg{display:grid;gap:1px;background:var(--border);border:1px solid var(--border);
  border-radius:10px;overflow:hidden;min-width:680px;}
.ttg-hd{background:var(--wine);color:#fff;font-size:15px;font-weight:600;letter-spacing:.06em;
  text-transform:uppercase;text-align:center;padding:11px 8px;}
.ttg-hdtime{letter-spacing:.04em;}
.ttg-time{background:#f7f1e6;color:var(--wine);font-size:15px;font-weight:700;line-height:1.25;
  display:flex;align-items:center;justify-content:center;text-align:center;padding:8px 4px;
  font-variant-numeric:tabular-nums;}
.ttg-cell{background:#f7f1e6;padding:11px 13px;display:flex;flex-direction:column;gap:4px;transition:.12s;}
.ttg-cell.panel{background:var(--panel-bg);box-shadow:inset 3px 0 0 var(--gold);}
.ttg-cell:hover{box-shadow:inset 0 0 0 2px var(--wine);}
.ttg-title{font-family:'EB Garamond','Noto Serif KR',serif;font-size:16px;font-weight:600;line-height:1.3;color:var(--ink);}
.ttg-count{font-size:13px;font-weight:500;color:var(--smoke);}
.ttg-empty{background:#fbf9f3;}
.ttg-plen{background:var(--event);display:flex;align-items:center;justify-content:center;text-align:center;
  font-size:16px;font-weight:500;color:#5a524a;letter-spacing:-.01em;padding:9px 12px;}
.ttg-plen.brk{color:var(--break);font-weight:700;}
.ttg-plen.click{cursor:pointer;}
.ttg-plen.click::after{content:"\203A";margin-left:7px;color:var(--gold);font-weight:700;}
.ttg-plen.click:hover{box-shadow:inset 0 0 0 2px var(--gold);}

/* ===== SLOT GROUP + CARDS ===== */
.slot-group{padding:6px 20px 18px;}
.slot-header{display:flex;align-items:center;gap:12px;padding:14px 0 10px;border-top:1px solid var(--border);}
.slot-badge{font-size:12px;letter-spacing:.14em;text-transform:uppercase;background:var(--wine);
  color:#fff;padding:.28em .8em;border-radius:3px;white-space:nowrap;}
.slot-time{font-size:16px;color:var(--bronze);font-weight:600;}
.slot-venue{font-size:13px;color:var(--smoke);margin-left:auto;letter-spacing:.06em;text-transform:uppercase;}
.rooms-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:14px;}
.session-card{background:var(--session-bg);border:1px solid var(--border);border-radius:8px;overflow:hidden;
  box-shadow:0 3px 10px var(--shadow);}
.panel-card{background:var(--panel-bg);border-color:#dcc78f;}
.card-header{padding:12px 14px 8px;display:flex;align-items:flex-start;gap:8px;border-bottom:1px solid var(--border);}
.card-type-dot{width:9px;height:9px;border-radius:50%;background:var(--indiv-bd);margin-top:5px;flex:none;}
.panel-card .card-type-dot{background:var(--gold);}
.card-title{font-family:'EB Garamond','Noto Serif KR',serif;font-weight:600;font-size:18px;line-height:1.28;flex:1;}
.card-room{font-size:13px;font-weight:600;color:#fff;background:var(--bronze);padding:.2em .5em;
  border-radius:3px;white-space:nowrap;}
.card-type-label{font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--smoke);padding:7px 14px 2px;}
.presenter-list{padding:4px 8px 10px;}
.pitem{padding:7px 8px;border-radius:6px;cursor:pointer;transition:.15s;}
.pitem:hover{background:rgba(143,36,51,.07);}
.pname{font-weight:600;font-size:16px;color:var(--ink);}
.ptitle{font-size:15px;color:var(--bronze);line-height:1.35;margin-top:1px;}

/* ===== PLENARY ===== */
.plenary-list{padding:8px 20px;}
.plenary-item{display:flex;gap:14px;align-items:baseline;padding:8px 12px;border-bottom:1px solid var(--border);}
.plenary-item.click{cursor:pointer;}
.plenary-item.click::after{content:"›";margin-left:auto;color:var(--smoke);font-weight:700;}
.plenary-item.click:hover{background:rgba(143,36,51,.05);}
.plenary-time{font-size:15px;font-weight:600;color:var(--bronze);min-width:108px;font-variant-numeric:tabular-nums;}
.plenary-desc{font-size:16px;color:var(--ink);}

/* ===== MODAL ===== */
.modal-overlay{display:none;position:fixed;inset:0;background:rgba(43,33,24,.46);
  backdrop-filter:blur(4px);z-index:100;justify-content:center;align-items:flex-start;overflow-y:auto;padding:48px 18px;}
.modal-overlay.open{display:flex;}
.modal{background:var(--paper);border-radius:16px;max-width:680px;width:100%;padding:32px 34px;
  position:relative;box-shadow:0 24px 60px rgba(43,33,24,.28);}
.modal-close{position:absolute;top:16px;right:18px;border:none;background:none;font-size:20px;cursor:pointer;color:var(--bronze);}
.modal-eyebrow{font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--bronze);margin-bottom:6px;}
.modal h3{font-family:'EB Garamond','Noto Serif KR',serif;font-size:24px;color:var(--wine);font-weight:600;}
.modal-meta{font-size:12.5px;color:var(--smoke);margin:4px 0 14px;}
.m-prestitle{font-family:'EB Garamond',serif;font-size:16px;font-style:italic;color:var(--ink);margin-bottom:4px;}
.m-affil{font-size:12.5px;color:var(--bronze);margin-bottom:12px;}
.m-abstract{font-size:13.5px;line-height:1.7;color:#3a3028;background:#f7f2e9;
  border-left:3px solid var(--wine);border-radius:0 6px 6px 0;padding:14px 16px;white-space:pre-wrap;}

footer{text-align:center;padding:30px 20px;color:var(--smoke);font-size:12px;border-top:1px solid var(--border);margin-top:30px;}
@media(max-width:600px){.day-hero{gap:12px;}.day-num-big{font-size:40px;}.ov-sub{display:none;}}

/* ===== ZOOM badge (remote presentations) ===== */
.zoom-badge{display:inline-block;font-family:'Inter',sans-serif;font-size:9px;font-weight:700;
  letter-spacing:.09em;text-transform:uppercase;background:#4a6d8c;color:#fff;
  padding:.18em .5em;border-radius:3px;margin-left:7px;vertical-align:middle;line-height:1;}
.modal h3 .zoom-badge{font-size:11px;vertical-align:middle;}