:root{
  --paper:#F5F8FC; --card:#FFFFFF; --ink:#15233B; --ink-soft:#41506A; --muted:#6B788C;
  --line:#D6E1EE; --line-soft:#E8F1FA;
  --vnu-blue:#005BAA; --vnu-blue-deep:#003A73; --vnu-blue-soft:#2E80C2;
  --gold:#E8A317; --gold-deep:#B97F0C;
  --nus:#005BAA; --smu:#003A73; --ntu:#2E80C2; --travel:#005BAA;
  --shadow:0 1px 2px rgba(0,58,115,.06), 0 12px 30px -18px rgba(0,58,115,.30);
  --shadow-strong:rgba(0,58,115,0.26);
  --r:14px;
}
*{box-sizing:border-box}
html,body{margin:0}
body{
  font-family:"Be Vietnam Pro",system-ui,-apple-system,sans-serif;
  background:var(--paper); color:var(--ink);
  -webkit-font-smoothing:antialiased; line-height:1.5;
  padding:0 0 80px;
}
.mono{font-family:"JetBrains Mono",ui-monospace,monospace;font-feature-settings:"tnum"}
.wrap{max-width:880px;margin:0 auto;padding:0 18px}

/* ---------- Header ---------- */
header.top{
  padding:34px 0 22px; border-bottom:1px solid var(--line);
  background:
    radial-gradient(900px 500px at 12% -8%, rgba(0,91,170,.10), transparent 60%),
    radial-gradient(900px 500px at 95% 8%, rgba(46,128,194,.10), transparent 55%),
    var(--paper);
}
.eyebrow{font-family:"JetBrains Mono",monospace;font-size:11.5px;letter-spacing:.22em;
  text-transform:uppercase;color:var(--muted);margin:0 0 10px}
h1{font-size:clamp(26px,5vw,40px);line-height:1.05;font-weight:800;letter-spacing:-.02em;margin:0}
.sub{font-size:15.5px;color:var(--muted);margin:9px 0 0;font-weight:500}
.meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.tag{font-family:"JetBrains Mono",monospace;font-size:11.5px;letter-spacing:.04em;
  background:var(--card);border:1px solid var(--line);border-radius:999px;
  padding:6px 12px;color:var(--ink)}
.tag b{color:var(--vnu-blue)}

/* ---------- Picker ---------- */
.picker{position:sticky;top:0;z-index:30;background:var(--paper);
  padding:16px 0 14px;border-bottom:1px solid var(--line)}
.picker .wrap{position:relative}
.field-label{font-size:12.5px;font-weight:600;color:var(--muted);
  text-transform:uppercase;letter-spacing:.08em;margin:0 0 8px}
.combo{position:relative}
#search{
  width:100%;font:inherit;font-size:16px;font-weight:500;
  background:var(--card);border:1.5px solid var(--line);border-radius:12px;
  padding:14px 44px 14px 16px;color:var(--ink);box-shadow:var(--shadow);
  transition:border-color .15s ease;
}
#search::placeholder{color:#9AA7B2;font-weight:400}
#search:focus{outline:none;border-color:var(--vnu-blue)}
.chev{position:absolute;right:15px;top:50%;transform:translateY(-50%);
  pointer-events:none;color:var(--muted);transition:transform .2s}
.combo.open .chev{transform:translateY(-50%) rotate(180deg)}
.clear-btn{position:absolute;right:38px;top:50%;transform:translateY(-50%);
  background:none;border:0;font-size:20px;line-height:1;color:var(--muted);
  cursor:pointer;padding:4px 6px;border-radius:6px;display:none;
  transition:color .15s,background .15s}
.clear-btn:hover{color:var(--ink);background:var(--line-soft)}
.clear-btn.visible{display:block}
.panel{
  position:absolute;left:0;right:0;top:calc(100% + 8px);
  background:var(--card);border:1px solid var(--line);border-radius:12px;
  box-shadow:0 18px 50px -20px rgba(26,39,51,.45);
  max-height:min(58vh,460px);overflow:auto;display:none;padding:6px}
.combo.open .panel{display:block}
.grp{font-family:"JetBrains Mono",monospace;font-size:10.5px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--muted);padding:12px 12px 6px}
.opt{display:flex;align-items:baseline;gap:10px;width:100%;text-align:left;
  background:none;border:0;border-radius:8px;padding:9px 12px;cursor:pointer;
  font:inherit;color:var(--ink)}
.opt:hover,.opt.active{background:var(--line-soft)}
.opt .num{font-family:"JetBrains Mono",monospace;font-size:11px;color:var(--muted);min-width:22px}
.opt .nm{font-weight:600;font-size:14.5px}
.opt .rl{font-size:12px;color:var(--muted);margin-left:auto;white-space:nowrap;
  overflow:hidden;text-overflow:ellipsis;max-width:42%}
.nohit{padding:18px 14px;color:var(--muted);font-size:14px}

/* ---------- Person header ---------- */
#result{padding-top:26px}
.person{background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  padding:20px 22px 18px;box-shadow:var(--shadow);margin-bottom:22px}
.person .pn{display:flex;align-items:baseline;gap:12px;flex-wrap:wrap}
.person h2{font-size:clamp(21px,4.2vw,28px);font-weight:800;letter-spacing:-.02em;margin:0}
.pills{display:flex;flex-wrap:wrap;gap:7px;margin-top:12px}
.pill{font-size:12.5px;border:1px solid var(--line);border-radius:999px;padding:5px 11px;
  color:var(--muted);text-decoration:none;display:inline-flex;align-items:center;gap:6px}
.pill.grp-pill{background:var(--vnu-blue);color:#fff;border-color:var(--vnu-blue);font-weight:600}
a.pill:hover{border-color:var(--vnu-blue);color:var(--vnu-blue)}

/* ---------- Travel cards ---------- */
.travel{display:flex;align-items:center;gap:16px;background:var(--card);
  border:1px dashed var(--line);border-left:4px solid var(--travel);
  border-radius:12px;padding:15px 18px;margin-bottom:16px}
.travel .ic{font-size:20px}
.travel .tx{font-size:15px}
.travel .tx b{display:block;font-family:"JetBrains Mono",monospace;font-size:12px;
  letter-spacing:.08em;color:var(--travel);text-transform:uppercase;margin-bottom:2px;font-weight:700}

/* ---------- Day ticket ---------- */
.ticket{display:flex;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow);margin-bottom:20px}
.rail{flex:0 0 62px;display:flex;flex-direction:column;align-items:center;
  justify-content:space-between;padding:18px 0;color:#fff;position:relative}
.rail .code{writing-mode:vertical-rl;transform:rotate(180deg);
  font-family:"JetBrains Mono",monospace;font-weight:700;letter-spacing:.22em;font-size:16px}
.rail .dn{font-family:"JetBrains Mono",monospace;font-size:12px;opacity:.85}
.rail::after{content:"";position:absolute;right:-1px;top:0;bottom:0;width:2px;
  background-image:radial-gradient(circle,var(--card) 1.6px,transparent 1.7px);
  background-size:2px 9px;background-repeat:repeat-y}
.nus .rail{background:var(--nus)} .smu .rail{background:var(--smu)} .ntu .rail{background:var(--ntu)}
.body{flex:1;min-width:0;padding:20px 22px 14px}
.dhead{display:flex;justify-content:space-between;align-items:center;gap:12px;
  flex-wrap:wrap;padding-bottom:14px;border-bottom:1px solid var(--line-soft);margin-bottom:0;
  cursor:pointer;user-select:none}
.dhead .wd{font-weight:800;font-size:20px}
.dhead .org-name{font-size:13px;color:var(--muted);margin-top:2px}
.dhead .org-logo{width:auto;object-fit:contain}
.dhead .org-logo-nus{height:36px}
.dhead .org-logo-smu{height:42px}
.dhead .org-logo-ntu{height:48px}
.dhead .toggle{transition:transform .2s;flex-shrink:0}
.dhead-text{flex:1;min-width:0}
.dhead-right{display:flex;align-items:center;gap:14px;flex-shrink:0}
.ticket.collapsed .toggle{transform:rotate(-90deg)}
.ticket-body{overflow:hidden;transition:max-height .3s ease}
.ticket.collapsed .ticket-body{display:none}
.dhead .org{font-family:"JetBrains Mono",monospace;font-size:12px;font-weight:700;
  letter-spacing:.06em;padding:5px 11px;border-radius:6px;color:#fff}
.nus .org{background:var(--nus)} .smu .org{background:var(--smu)} .ntu .org{background:var(--ntu)}
.dloc{font-size:14px;color:var(--muted);margin:10px 0 6px;display:flex;gap:7px;align-items:flex-start}

.sess{display:flex;gap:16px;padding:16px 0;border-top:1px solid var(--line-soft)}
.sess:first-of-type{border-top:0}
.sess .time{flex:0 0 84px;font-family:"JetBrains Mono",monospace;font-size:13.5px;
  font-weight:500;color:var(--ink);padding-top:1px;white-space:nowrap}
.sess .time.tba{color:#9AA7B2}
.sess .c{flex:1;min-width:0}
.sess .t{font-weight:600;font-size:16.5px;line-height:1.35}
.sess .d{font-size:14px;color:var(--muted);margin-top:4px}
.sess .where{font-size:13px;color:var(--muted);margin-top:7px;display:flex;gap:5px;align-items:flex-start}
.gp{display:inline-block;font-family:"JetBrains Mono",monospace;font-size:11px;font-weight:700;
  letter-spacing:.05em;padding:3px 9px;border-radius:999px;margin-top:8px;
  background:var(--line-soft);color:var(--muted)}
.nus .gp{background:rgba(0,91,170,.10);color:var(--nus)}
.smu .gp{background:rgba(0,58,115,.10);color:var(--smu)}
.ntu .gp{background:rgba(46,128,194,.10);color:var(--ntu)}
.noday{font-size:14px;color:var(--muted);padding:8px 0 16px}

.svg-ic{width:16px;height:16px;flex:0 0 auto;margin-top:1px}

@media (max-width:560px){
  .rail{flex-basis:50px}
  .sess{flex-direction:column;gap:4px}
  .sess .time{flex-basis:auto}
  .opt .rl{display:none}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}
:focus-visible{outline:2.5px solid var(--vnu-blue);outline-offset:2px;border-radius:4px}

/* ---------- Admin bar ---------- */
.admin-bar{padding:14px 0 2px}
.admin-btn{
  font:inherit;font-size:12.5px;font-weight:600;letter-spacing:.03em;
  background:none;border:1.5px solid var(--line);border-radius:8px;
  padding:7px 15px;color:var(--muted);cursor:pointer;
  display:inline-flex;align-items:center;gap:6px;
  transition:border-color .15s,color .15s,background .15s;
}
.admin-btn:hover{border-color:var(--vnu-blue);color:var(--vnu-blue);background:var(--line-soft)}

/* ---------- Admin overlay ---------- */
.admin-overlay{
  position:fixed;inset:0;z-index:200;
  display:flex;flex-direction:column;
  background:var(--paper);
}
.admin-overlay[hidden]{display:none}

/* Auth screen */
.admin-auth{
  flex:1;display:flex;align-items:center;justify-content:center;
  background:rgba(15,27,50,.55);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);
}
.admin-auth[hidden]{display:none}
.auth-card{
  background:var(--card);border:1px solid var(--line);border-radius:18px;
  padding:36px 40px;width:min(400px,92vw);
  box-shadow:0 32px 80px -24px rgba(0,58,115,.45);
}
.auth-card-logo{
  width:8px;height:40px;background:var(--vnu-blue);border-radius:4px;
  display:inline-block;margin-bottom:20px;
}
.auth-card h2{margin:0 0 6px;font-size:22px;font-weight:800;letter-spacing:-.02em;color:var(--ink)}
.auth-card p{margin:0 0 22px;color:var(--muted);font-size:14px}
.auth-card input{
  width:100%;font:inherit;font-size:15px;font-weight:500;
  border:1.5px solid var(--line);border-radius:10px;
  padding:12px 15px;color:var(--ink);background:var(--paper);
  transition:border-color .15s,box-shadow .15s;
}
.auth-card input:focus{outline:none;border-color:var(--vnu-blue);box-shadow:0 0 0 3px rgba(0,91,170,.12)}
.auth-err{margin-top:9px;font-size:13px;color:#B91C1C;font-weight:600;display:flex;align-items:center;gap:5px}
.auth-err[hidden]{display:none}
.auth-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:22px}
.auth-cancel{
  font:inherit;font-size:14px;font-weight:600;border-radius:8px;
  padding:10px 20px;cursor:pointer;border:1.5px solid var(--line);
  background:none;color:var(--muted);transition:background .15s,color .15s;
}
.auth-cancel:hover{background:var(--line-soft);color:var(--ink)}
.auth-ok{
  font:inherit;font-size:14px;font-weight:700;border-radius:8px;
  padding:10px 24px;cursor:pointer;border:none;
  background:var(--vnu-blue);color:#fff;
  box-shadow:0 2px 8px rgba(0,91,170,.30);
  transition:background .15s,box-shadow .15s;
}
.auth-ok:hover{background:var(--vnu-blue-deep);box-shadow:0 4px 14px rgba(0,58,115,.35)}

/* Overview screen */
.admin-view{flex:1;display:flex;flex-direction:column;min-height:0}
.admin-view[hidden]{display:none}
.admin-topbar{
  display:flex;align-items:center;justify-content:space-between;
  padding:13px 20px;border-bottom:1px solid var(--line);
  background:var(--card);flex-shrink:0;
  box-shadow:0 1px 0 var(--line);
}
.admin-topbar-left{display:flex;align-items:center;gap:12px}
.admin-topbar-accent{width:4px;height:24px;background:var(--vnu-blue);border-radius:2px}
.admin-title{font-weight:800;font-size:15px;letter-spacing:-.01em;color:var(--ink)}
.admin-title span{font-weight:400;color:var(--muted);font-size:13px;margin-left:6px}
.admin-close{
  font:inherit;font-size:13px;font-weight:600;background:none;
  border:1.5px solid var(--line);border-radius:8px;padding:7px 16px;
  cursor:pointer;color:var(--muted);transition:color .15s,border-color .15s,background .15s;
}
.admin-close:hover{color:var(--ink);border-color:var(--ink);background:var(--line-soft)}
.admin-scroll{flex:1;overflow:auto}

/* Overview table */
.ov-table{border-collapse:collapse;font-size:12.5px;white-space:nowrap;width:100%}
.ov-table th,.ov-table td{
  border:1px solid var(--line);padding:7px 11px;
  text-align:center;vertical-align:middle;
}

/* all thead cells are sticky (top set dynamically by JS) */
.ov-table thead th{position:sticky;z-index:3}

/* day header */
.th-day{
  color:#fff;font-size:13px;font-weight:700;letter-spacing:.01em;
  border-color:rgba(255,255,255,.2)!important;
}
.th-day-org-label{
  font-family:"JetBrains Mono",monospace;font-size:10px;font-weight:700;
  letter-spacing:.14em;opacity:.75;display:block;margin-bottom:2px;text-transform:uppercase;
}
.th-day-nus{background:var(--nus)}
.th-day-smu{background:var(--smu)}
.th-day-ntu{background:var(--ntu)}

/* session sub-headers */
.th-time{
  background:#EBF3FC;font-family:"JetBrains Mono",monospace;
  font-size:13px;color:var(--ink-soft);font-weight:600;
  white-space:nowrap;padding:8px 12px;
}
.th-title{
  background:var(--line-soft);font-size:13px;font-weight:700;color:var(--ink);
  width:120px;min-width:120px;max-width:120px;
  white-space:normal;line-height:1.4;padding:9px 12px;
}

/* total count row (thead row 4) */
.th-total-count{
  background:var(--vnu-blue-deep);color:var(--gold);
  font-family:"JetBrains Mono",monospace;font-size:13px;font-weight:800;
  border-color:rgba(255,255,255,.15)!important;letter-spacing:.02em;
}
.th-total-meta{
  background:var(--vnu-blue-deep)!important;color:#fff!important;
  font-weight:700;font-size:13px;border-color:rgba(255,255,255,.15)!important;
}

/* meta columns — sticky left AND sticky top (corner pinning) */
.th-meta{
  position:sticky;z-index:5!important;
  background:var(--card);text-align:left;
}
.th-stt{left:0;width:44px;min-width:44px;text-align:center}
.th-name{left:44px;min-width:175px;border-right:2px solid var(--line)!important}

/* "Tổng tham dự" label spans the two meta cols — handled via rowspan + no content */
/* (row 4 meta cells are provided by rowspan=4 from row 1) */

/* data cells */
.td-stt{
  position:sticky;left:0;z-index:2;background:var(--card);
  width:44px;min-width:44px;
  font-family:"JetBrains Mono",monospace;font-size:11.5px;color:var(--muted);
  text-align:center;
}
.td-name{
  position:sticky;left:44px;z-index:2;background:var(--card);
  text-align:left;font-weight:500;color:var(--ink);min-width:175px;
  white-space:normal;line-height:1.4;border-right:2px solid var(--line)!important;
}
.td-cell{color:var(--muted);font-size:11px}
.td-cell.tick{color:var(--vnu-blue);font-size:15px;font-weight:800}
.td-cell.tick span{display:block;line-height:1}

/* hover */
.ov-table tbody tr:hover .td-stt,
.ov-table tbody tr:hover .td-name{background:#EBF3FC}
.ov-table tbody tr:hover .td-cell{background:#F4F8FD}