/* Bố cục: thanh đầu dính + bảng điều khiển + 3 chế độ xem (phòng trống / theo tòa / tra cứu). Màu theo trạng thái phòng: xanh lá trống, xanh dương có lớp. */
:root{
  --bg:#F2F4F7; --surface:#FFFFFF; --ink:#18212C; --muted:#5B6878; --line:#DCE2E9; --soft:#E9EDF2;
  --accent:#A3171C; --accent-ink:#FFFFFF; --accent-soft:#F8E4E4;
  --free:#1C7A4B; --free-bg:#E1F3E9; --busy:#2C5BA6; --busy-bg:#E2EAF8; --busy-bar:#3B6DC0; --warn:#8A4B06; --warn-bg:#FFEFD3; --exam:#B4541A; --exam-bg:#FDEBDD;
  --shadow:0 1px 2px rgba(20,30,45,.06),0 4px 14px rgba(20,30,45,.05);
  --f-body:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --f-mono:"JetBrains Mono",ui-monospace,Menlo,Consolas,monospace;
  --r:12px;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --bg:#0F141A; --surface:#171E27; --ink:#E7ECF1; --muted:#97A4B3; --line:#2A3441; --soft:#1F2833;
  --accent:#F0625B; --accent-ink:#1A0B0B; --accent-soft:#3A1E1F;
  --free:#56C990; --free-bg:#173126; --busy:#8EB1F2; --busy-bg:#1C2A42; --busy-bar:#4F7DD0; --warn:#F3B35B; --warn-bg:#3A2C14; --exam:#E8894F; --exam-bg:#3A2418;
  --shadow:0 1px 2px rgba(0,0,0,.3); color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#0F141A; --surface:#171E27; --ink:#E7ECF1; --muted:#97A4B3; --line:#2A3441; --soft:#1F2833;
  --accent:#F0625B; --accent-ink:#1A0B0B; --accent-soft:#3A1E1F;
  --free:#56C990; --free-bg:#173126; --busy:#8EB1F2; --busy-bg:#1C2A42; --busy-bar:#4F7DD0; --warn:#F3B35B; --warn-bg:#3A2C14; --exam:#E8894F; --exam-bg:#3A2418;
  --shadow:0 1px 2px rgba(0,0,0,.3); color-scheme:dark}
*{box-sizing:border-box}
body{background:var(--bg);color:var(--ink);font-family:var(--f-body);font-size:15px;line-height:1.5;-webkit-font-smoothing:antialiased}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:10;background:var(--accent)}
.wrap{max-width:1080px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
button,input,select{font:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.mono{font-family:var(--f-mono);font-variant-numeric:tabular-nums}

header.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:5;background:var(--accent);color:var(--accent-ink)}
header.top .wrap{display:flex;align-items:center;gap:12px;padding-block:12px}
.logo{flex:none;display:block;border-radius:11px;line-height:0;box-shadow:0 0 0 1px rgba(255,255,255,.35)}
.byline{display:inline-flex;align-items:center;gap:5px;font-weight:700;font-size:12.5px!important;opacity:1!important}
.tick-ok{flex:none}
.brand{display:flex;flex-direction:column;line-height:1.15;min-width:0;flex:1}
.brand span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.brand b{font-weight:800;font-size:18px;letter-spacing:-.01em}
.brand span{font-size:12px;opacity:.85}
.today{margin-left:auto;font-size:13px;font-weight:600;background:rgba(255,255,255,.16);padding:6px 10px;border-radius:999px;white-space:nowrap}
:root[data-theme="dark"] .today{background:rgba(0,0,0,.18)}

.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);padding:14px;margin-top:14px;display:grid;gap:12px}
.row{display:flex;flex-wrap:wrap;gap:10px;align-items:flex-end}
.field{display:flex;flex-direction:column;gap:4px;min-width:0}
.field label{font-size:11px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.ctl{height:40px;border:1px solid var(--line);background:var(--bg);border-radius:10px;padding:0 10px;min-width:0}
.ctl:hover{border-color:var(--muted)}
.datebox{display:flex;gap:6px;align-items:center}
.iconbtn{height:40px;width:40px;border:1px solid var(--line);background:var(--bg);border-radius:10px;font-size:18px;line-height:1}
.chipbtn{white-space:nowrap;height:40px;border:1px solid var(--line);background:var(--bg);border-radius:10px;padding:0 12px;font-weight:600;font-size:14px}
.chipbtn:hover,.iconbtn:hover{border-color:var(--muted)}
.ctx{font-size:13px;color:var(--muted)}
.ctxrow{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap}
.report{font-size:13px;font-weight:700;color:var(--accent);text-decoration:none;border:1px solid var(--accent);border-radius:999px;padding:4px 12px;white-space:nowrap}
.report:hover{background:var(--accent-soft)}
.caveat{font-size:12.5px;color:var(--muted);background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:8px 12px;margin:0 0 12px}
.ctx b{color:var(--ink)}

.tabs{display:flex;gap:4px;background:var(--soft);padding:4px;border-radius:12px;margin-top:14px;overflow-x:auto}
.tabs button{flex:1;min-width:max-content;border:0;background:transparent;padding:9px 14px;border-radius:9px;font-weight:600;color:var(--muted);font-size:14px}
.tabs button[aria-selected="true"]{background:var(--surface);color:var(--ink);box-shadow:var(--shadow)}

.chips{display:flex;gap:6px;flex-wrap:wrap}
.chip{border:1px solid var(--line);background:var(--surface);border-radius:999px;padding:5px 12px;font-size:13px;font-weight:600;color:var(--muted)}
.chip[aria-pressed="true"]{background:var(--ink);color:var(--surface);border-color:var(--ink)}
.chip small{font-weight:500;opacity:.7;margin-left:4px}

main{padding-block:14px 40px}
.notice{border-radius:var(--r);padding:12px 14px;background:var(--warn-bg);color:var(--warn);font-weight:600;font-size:14px;display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.notice button{border:1px solid currentColor;background:transparent;border-radius:8px;padding:4px 10px;font-weight:600;color:inherit}
.sumline{display:flex;align-items:baseline;justify-content:space-between;gap:10px;flex-wrap:wrap;margin:4px 0 12px}
.sumline h2{margin:0;font-size:20px;font-weight:800;letter-spacing:-.01em;text-wrap:balance}
.sumline h2 em{font-style:normal;color:var(--free)}
.seg{display:flex;gap:2px;background:var(--soft);padding:3px;border-radius:9px}
.seg button{border:0;background:transparent;border-radius:7px;padding:5px 10px;font-size:13px;font-weight:600;color:var(--muted)}
.seg button[aria-pressed="true"]{background:var(--surface);color:var(--ink)}

.group{margin-top:18px}
.group h3{margin:0 0 8px;font-size:13px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:var(--muted);display:flex;gap:8px;align-items:baseline}
.group h3 span{font-weight:500;letter-spacing:0;text-transform:none}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:8px}
.room{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:10px 12px;display:grid;gap:2px;text-align:left;width:100%}
.room:hover{border-color:var(--free)}
.room .code{font-family:var(--f-mono);font-weight:700;font-size:16px;display:flex;justify-content:space-between;gap:8px}
.room .code small{font-family:var(--f-body);font-weight:500;font-size:12px;color:var(--muted)}
.room .span{color:var(--free);font-weight:600;font-size:14px}
.room .next{color:var(--muted);font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

/* timeline */
.tl{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);overflow-x:auto;margin-top:12px}
.tl-in{min-width:860px;position:relative}
.tl-row{display:grid;grid-template-columns:118px 1fr;border-top:1px solid var(--line);min-height:40px}
.tl-row:first-child{border-top:0}
.tl-name{position:sticky;left:0;background:var(--surface);z-index:2;padding:8px 10px;font-family:var(--f-mono);font-weight:700;font-size:13px;border-right:1px solid var(--line);display:flex;flex-direction:column;justify-content:center}
.tl-name small{font-family:var(--f-body);font-weight:500;font-size:11px;color:var(--muted)}
.tl-track{position:relative;background:var(--free-bg)}
.tl-head .tl-track{background:transparent;height:28px}
.tl-head .tl-name{font-family:var(--f-body);font-size:11px;color:var(--muted);font-weight:700;letter-spacing:.05em;text-transform:uppercase}
.tick{position:absolute;top:0;bottom:0;border-left:1px dashed var(--line)}
.tick-l{position:absolute;top:6px;transform:translateX(-50%);font-size:11px;color:var(--muted);font-family:var(--f-mono)}
.band{position:absolute;top:0;bottom:0;background:rgba(163,23,28,.08);border-left:2px solid var(--accent);border-right:2px solid var(--accent);pointer-events:none;z-index:1}
.nowline{position:absolute;top:0;bottom:0;width:2px;background:var(--accent);z-index:3;pointer-events:none}
.bar{position:absolute;top:5px;bottom:5px;background:var(--busy-bar);color:#fff;border-radius:6px;font-size:11.5px;font-weight:600;padding:3px 6px;overflow:hidden;white-space:nowrap;text-overflow:ellipsis;border:1px solid rgba(255,255,255,.35);text-align:left;line-height:1.2;z-index:2}
.bar.ov{background:repeating-linear-gradient(45deg,var(--busy-bar),var(--busy-bar) 6px,#6c8fd2 6px,#6c8fd2 12px)}
.bar.ex{background:var(--warn)}
.bar:hover{filter:brightness(1.1)}
.detail{margin-top:10px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:12px 14px;font-size:14px}
.detail[hidden]{display:none}
.legend{display:flex;gap:14px;flex-wrap:wrap;font-size:12px;color:var(--muted);margin-top:10px}
.legend i{display:inline-block;width:12px;height:12px;border-radius:3px;vertical-align:-2px;margin-right:5px}

/* tra cứu */
.search{position:relative}
.search input{width:100%;height:46px;font-size:16px;padding:0 14px;border-radius:12px;border:1px solid var(--line);background:var(--surface)}
.hint{font-size:13px;color:var(--muted);margin-top:8px}
.week{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:8px;margin-top:12px}
.day{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:10px;min-width:0}
.day.is-on{border-color:var(--accent)}
.day h4{margin:0 0 6px;font-size:13px;display:flex;justify-content:space-between}
.day h4 span{color:var(--muted);font-weight:500}
.sess{border-left:3px solid var(--busy-bar);padding:3px 0 3px 8px;margin:6px 0;font-size:12.5px;line-height:1.35}
.sess b{font-family:var(--f-mono);font-size:12px}
.sess div{color:var(--muted)}
.free-note{font-size:12.5px;color:var(--free);font-weight:600}
.res{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:12px;margin-top:8px}
.res h4{margin:0;font-size:15px}
.res .meta{color:var(--muted);font-size:13px}
.res ul{margin:8px 0 0;padding:0;list-style:none;display:grid;gap:4px;font-size:13.5px}
.res li{display:flex;gap:10px;flex-wrap:wrap}
.res li b{font-family:var(--f-mono)}
.tag{display:inline-block;font-size:11px;font-weight:700;padding:1px 7px;border-radius:999px;background:var(--busy-bg);color:var(--busy)}
.empty{padding:30px 14px;text-align:center;color:var(--muted);background:var(--surface);border:1px dashed var(--line);border-radius:var(--r)}
footer{color:var(--muted);font-size:12.5px;border-top:1px solid var(--line);padding-block:16px 28px}
footer p{margin:4px 0;max-width:70ch}
@media (max-width:720px){
  .week{grid-template-columns:1fr}
  .brand b{font-size:16px}
  .today{display:none}
  .datebox{width:100%}
  .datebox .ctl{flex:1}
  .field.grow{flex:1 1 140px}
  .ctl{width:100%}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}

.acct{flex:none;border:1px solid rgba(255,255,255,.6);background:transparent;color:var(--accent-ink);border-radius:999px;padding:6px 12px;font-weight:700;font-size:13px;white-space:nowrap;max-width:46vw;overflow:hidden;text-overflow:ellipsis}
.acct:hover{background:rgba(255,255,255,.14)}
.modal{position:fixed;inset:0;background:rgba(10,15,22,.55);z-index:20;display:grid;place-items:center;padding:16px}
.modal-in{background:var(--surface);color:var(--ink);border-radius:14px;padding:18px;width:min(420px,100%);display:grid;gap:10px;box-shadow:var(--shadow)}
.modal-in h3{margin:0;font-size:18px}
.modal-in p{margin:0}
.lgrow{display:flex;gap:8px;margin-top:10px;flex-wrap:wrap}
.chipbtn.primary{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
.lgmsg{font-size:13px;color:var(--accent);min-height:1em}
.box{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:14px;margin-top:12px;display:grid;gap:10px}
.box h3{margin:0;font-size:16px;display:flex;justify-content:space-between;gap:8px;flex-wrap:wrap;align-items:baseline}
.stars{color:#E8A317;letter-spacing:1px;font-size:15px}
.starpick button{border:0;background:transparent;font-size:26px;line-height:1;color:var(--line);padding:0 2px;cursor:pointer}
.starpick button.on{color:#E8A317}
.tagpick{display:flex;gap:6px;flex-wrap:wrap}
.rv{border-top:1px solid var(--line);padding-top:8px;font-size:14px}
.rv:first-of-type{border-top:0;padding-top:0}
.rv .meta{font-size:12px;color:var(--muted)}
.rv .tg{display:inline-block;font-size:11.5px;background:var(--soft);border-radius:999px;padding:1px 8px;margin:2px 4px 0 0;color:var(--muted)}
textarea.ctl{height:auto;min-height:70px;padding:8px 10px;width:100%;resize:vertical}
.fav[aria-pressed="true"]{background:#E8A317;border-color:#E8A317;color:#1a1200}

.acct.admin{background:linear-gradient(135deg,#F7D774,#E8A317);color:#3a2600;border-color:#F7D774;box-shadow:0 0 0 2px rgba(247,215,116,.35)}
.rv.pinned{background:var(--warn-bg);border-radius:10px;padding:8px 10px;border-top:0}
.rv.hid{opacity:.5}
.rv .pin{font-size:11px;font-weight:800;color:var(--warn);text-transform:uppercase;letter-spacing:.05em}
.admbadge{color:#B07A00;font-weight:800}
.rv.adm{border-left:3px solid #E8A317;padding-left:10px}
.rv .who{font-family:var(--f-mono);color:var(--accent)}
.admrow{display:flex;gap:6px;margin-top:6px}
/* mùa đông */
header.top{overflow:hidden}
#snow{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;z-index:0}
header.top .wrap{position:relative;z-index:1}
.winter body,body.winter{background-image:radial-gradient(circle at 10% 0,rgba(140,180,230,.16),transparent 40%),radial-gradient(circle at 90% 10%,rgba(140,180,230,.12),transparent 35%)}

/* ===== bản 11/2026: gọn hơn, ảnh, kiểm duyệt ===== */
.logo img{border-radius:11px;display:block}
.brand b{font-size:17px}
.byline{font-size:12px!important;opacity:.92!important;font-weight:600}
.strip{display:flex;align-items:center;gap:10px;margin-top:10px;padding:8px 12px;border-radius:10px;font-size:13.5px;border:1px solid var(--line);background:var(--surface)}
.strip>span{flex:1;min-width:0}
.strip.exam{background:var(--exam-bg);border-color:transparent;color:var(--ink)}
.strip.exam b{color:var(--exam)}
.strip.season{color:#244B7A;background:#EEF4FB;border-color:#D9E6F5}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]) .strip.season{background:#172437;color:#A9C8F0;border-color:#24364f}}
:root[data-theme="dark"] .strip.season{background:#172437;color:#A9C8F0;border-color:#24364f}
.strip svg{flex:none}
.caveat{background:transparent;border:0;padding:0;margin:-4px 0 10px}
.exm-t{color:var(--exam);font-weight:700}
.bar.exm{background:var(--exam)}
.sess.exm{border-left-color:var(--exam);background:var(--exam-bg);border-radius:0 6px 6px 0}
.res.exm-box{border-color:var(--exam);border-left-width:4px}
.res.exm-box h4{color:var(--exam)}
.lnk{cursor:pointer;text-decoration:underline dotted;text-underline-offset:3px}
.room .span small{font-family:var(--f-body);font-weight:500}
.group{content-visibility:auto;contain-intrinsic-size:auto 220px}
.tl-row{content-visibility:auto;contain-intrinsic-size:auto 40px}
.tl-head{content-visibility:visible}
.report{padding:3px 10px;font-size:12.5px}
footer .contact a{color:inherit;font-weight:700}
.toast{position:fixed;left:50%;bottom:calc(18px + env(safe-area-inset-bottom,0px));transform:translateX(-50%);background:var(--ink);color:var(--surface);padding:10px 16px;border-radius:999px;font-size:14px;font-weight:600;z-index:40;max-width:calc(100% - 32px);box-shadow:0 6px 20px rgba(0,0,0,.25)}
body.noscroll{overflow:hidden}
.modal{overscroll-behavior:contain}
.modal-in{max-height:calc(100dvh - 32px);overflow:auto}
.modal-in.wide{width:min(760px,100%)}
.mhead{display:flex;justify-content:space-between;align-items:center;gap:8px}
.acct.adm-open{position:relative;border-color:#F7D774;color:#FFE9A8}
.badge{position:absolute;top:-6px;right:-6px;background:#FFD23F;color:#3a2600;border-radius:999px;font-size:11px;min-width:18px;height:18px;line-height:18px;padding:0 5px;text-align:center}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(105px,1fr));gap:8px}
.stat{background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:8px 10px;display:grid}
.stat b{font-size:22px;font-weight:800;font-variant-numeric:tabular-nums}
.stat span{font-size:12px;color:var(--muted)}
.stat.live b{color:var(--free)}
.stat.live b::before{content:"";display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--free);margin-right:6px;vertical-align:4px;animation:pulse 1.6s infinite}
.stat.warn b{color:var(--accent)}
@keyframes pulse{50%{opacity:.25}}
#admBody{display:grid;gap:8px}
.acard{display:flex;gap:12px;align-items:flex-start;border:1px solid var(--line);border-radius:10px;padding:10px}
.acard.hid{opacity:.7}
.ainfo{display:grid;gap:3px;min-width:0;font-size:14px}
.chip.danger{color:var(--accent);border-color:var(--accent)}
.roombox{gap:12px}
.rvhead{display:flex;justify-content:space-between;align-items:baseline;gap:8px;flex-wrap:wrap;border-top:1px solid var(--line);padding-top:12px}
.rvhead h3{margin:0;font-size:16px}
.rvf{border:1px solid var(--line);border-radius:10px;padding:10px 12px;background:var(--bg)}
.rvf summary{cursor:pointer;font-weight:700;font-size:14px}
.rvf[open] summary{margin-bottom:8px}
.rvf>*+*{margin-top:8px}
.cnt{text-align:right;margin-top:2px!important;font-size:11.5px}
.rv{display:grid;gap:4px}
.rvtop{display:flex;gap:8px;align-items:baseline;flex-wrap:wrap}
.rv .cm{margin:0;white-space:pre-wrap;overflow-wrap:anywhere}
.tgs{display:flex;flex-wrap:wrap}
.phs{display:flex;gap:6px;flex-wrap:wrap}
.phs:empty{display:none}
.ph{position:relative;border:1px solid var(--line);border-radius:8px;padding:0;background:var(--soft);overflow:hidden;line-height:0;width:84px;height:84px;flex:none}
.ph img{width:100%;height:100%;object-fit:cover}
.ph.big{width:120px;height:120px}
.ph.phh{outline:2px dashed var(--accent)}
.ph i{position:absolute;left:4px;top:4px;background:var(--accent);color:#fff;font-style:normal;font-size:10px;line-height:1.4;padding:0 5px;border-radius:4px}
.ph .x{position:absolute;top:3px;right:3px;width:22px;height:22px;border-radius:50%;border:0;background:rgba(0,0,0,.65);color:#fff;font-size:15px;line-height:22px;padding:0}
.addph{cursor:pointer;display:inline-block}
.addph[hidden]{display:none}
.viewer-in{width:min(960px,100%);display:grid;gap:10px;justify-items:center}
.viewer-in img{max-width:100%;max-height:calc(100dvh - 140px);border-radius:10px;background:#111;object-fit:contain}
.vbar{display:flex;gap:8px}
.vrep{background:var(--surface);color:var(--ink);border-radius:12px;padding:12px;width:min(520px,100%);display:grid;gap:8px}
.vrep p{margin:0}
.skel{height:56px;border-radius:10px;background:linear-gradient(90deg,var(--soft),var(--bg),var(--soft));background-size:200% 100%;animation:sk 1.2s infinite}
@keyframes sk{to{background-position:-200% 0}}
@media (max-width:720px){
  .acct{padding:6px 10px;font-size:12.5px;max-width:34vw}
  .acct.adm-open{font-size:0;padding:6px 10px}
  .acct.adm-open::before{content:"♛";font-size:14px}
  .strip{font-size:13px}
  .acard{flex-direction:column}
  .tabs button{padding:9px 8px}
}
@media (prefers-reduced-motion:reduce){.stat.live b::before,.skel{animation:none}}
.panel{grid-template-columns:minmax(0,1fr)}
.datebox .ctl{min-width:0}
textarea{font:inherit;color:inherit}
.badge{position:static;display:inline-block;margin-left:6px;vertical-align:1px}
.day.free-day h4{margin:0}
@media (max-width:720px){
  .panel{padding:12px}
  .datebox .chipbtn{padding:0 10px}
  .brand b{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  header.top .wrap{gap:8px}
  .acct{max-width:30vw}
  .acct.adm-open .badge{font-size:11px}
  .hide-sm{display:none}
  .week{gap:6px}
  .day{padding:8px 10px}
  .day.free-day{display:flex;justify-content:space-between;align-items:center;gap:8px}
  .day.free-day h4{flex:1;justify-content:flex-start;gap:8px}
}
@media (max-width:720px){
  .brand b{font-size:15.5px}
  .acct{max-width:24vw;padding:6px 9px}
  .stats{grid-template-columns:repeat(3,minmax(0,1fr))}
  .stat b{font-size:19px}
  .acard{flex-direction:row}
  .ph.big{width:88px;height:88px}
}
.chip,.seg button{white-space:nowrap}.admrow{flex-wrap:wrap}
/* "Tôi đang ngồi đây" */
.ppl{display:inline-block;font-family:var(--f-body);font-size:11px;font-weight:700;color:var(--free);background:var(--free-bg);border-radius:999px;padding:0 7px;margin-right:6px;line-height:18px}
.ppl[hidden]{display:none}
.ppl::before,.livedot{content:"";display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--free);margin-right:4px;vertical-align:1px;animation:pulse 1.6s infinite}
.livedot{flex:none;width:9px;height:9px;margin:0}
.livedot.off{background:var(--line);animation:none}
.seatline{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:14px}
.seatline>span{flex:1;min-width:0}
.chip.primary-chip{background:var(--free);border-color:var(--free);color:#fff}
.chip.on{background:var(--free-bg);border-color:var(--free);color:var(--free)}
.strip.seat{background:var(--free-bg);border-color:transparent}
.strip.seat b{color:var(--free)}
@media (prefers-reduced-motion:reduce){.ppl::before,.livedot{animation:none}}
.flabel{font-size:11px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}.rv .nm{color:var(--ink);font-weight:700}
.inapp{background:var(--warn-bg);color:var(--ink);border-radius:10px;padding:10px 12px;font-size:13px;display:grid;gap:8px;justify-items:start}.inapp b{color:var(--warn)}

/* ===== bản 10/11/2026: tiêu đề in hoa + ô "Tôi đang ngồi đây" ===== */
.brand{gap:2px}
.brand b{text-transform:uppercase;font-weight:800;font-size:19px;letter-spacing:.04em;line-height:1.1}
.byline{text-transform:uppercase;font-size:10.5px!important;font-weight:600;letter-spacing:.09em;opacity:.88!important}
.byline .tick-ok{width:11px;height:11px}
@media (max-width:720px){.brand b{font-size:16px;letter-spacing:.03em}.byline{font-size:9.5px!important;letter-spacing:.07em}}
@media (max-width:380px){.brand b{font-size:14.5px;letter-spacing:.02em}}
.seatcard{margin:10px 0 4px;padding:10px 12px;border-radius:10px;background:var(--free-bg);border:1px solid transparent}
.seatcard:empty{display:none}
.seatcard .seatline{font-size:14px}
.chip.primary-chip[disabled]{opacity:.45;cursor:not-allowed}
.seatwhy{margin:6px 0 0;font-size:12.5px;color:var(--muted)}

/* tra cứu: tách phòng & lớp / lịch thi */
.findseg{margin-top:14px}
.findseg button{flex:1;padding:9px 10px;font-size:14px;white-space:normal;line-height:1.25}
.findseg button[aria-pressed="true"]{color:var(--accent);box-shadow:var(--shadow)}
.findseg+.search{margin-top:10px}
.lnk.nolnk{cursor:default;text-decoration:none}
/* chân trang: chữ trải hết bề ngang khung (trước bị giới hạn 70 ký tự/dòng nên hở bên phải) */
footer p{max-width:none}

/* ===== bản 1.6 (11/2026): online, menu ⋮, đánh giá gần đây, lịch sử cập nhật ===== */
.acctbox{flex:none;display:flex;flex-direction:column;align-items:flex-end;gap:3px;min-width:0}
.acctbox .acct{max-width:46vw}
.online{display:inline-flex;align-items:center;gap:5px;font-size:11px;font-weight:600;line-height:1;white-space:nowrap;opacity:.95;font-variant-numeric:tabular-nums}
.online i{width:7px;height:7px;border-radius:50%;background:#7CF0A9;box-shadow:0 0 0 2px rgba(124,240,169,.25);animation:pulse 1.6s infinite}
.kebab{flex:none;position:relative;width:36px;height:36px;margin-right:-6px;border:0;border-radius:10px;background:transparent;color:var(--accent-ink);display:grid;place-items:center;padding:0}
.kebab:hover,.kebab[aria-expanded="true"]{background:rgba(255,255,255,.16)}
.kebab .dot,.kebab.new::after{position:absolute;top:3px;right:1px;width:8px;height:8px;border-radius:50%;background:#FFD23F;box-shadow:0 0 0 2px var(--accent)}
.kebab.new::after{content:"";background:#7CF0A9}
.kebab .dot[hidden]{display:none}
.menu{position:fixed;z-index:15;width:min(260px,calc(100vw - 16px));background:var(--surface);color:var(--ink);border:1px solid var(--line);border-radius:12px;box-shadow:0 10px 30px rgba(10,15,22,.18);padding:6px;display:grid;gap:2px}
.menu[hidden]{display:none}
.menu a,.menu button{display:flex;justify-content:space-between;align-items:center;gap:10px;width:100%;text-align:left;border:0;background:transparent;border-radius:8px;padding:10px 12px;font-size:14.5px;font-weight:600;color:var(--ink);text-decoration:none;min-height:42px}
.menu a:hover,.menu button:hover,.menu a:focus-visible,.menu button:focus-visible{background:var(--soft)}
.menu a[aria-current="page"]{color:var(--accent);background:var(--accent-soft)}
.menu small{font-size:11.5px;font-weight:600;color:var(--muted)}
.menu .newtag{color:#fff;background:var(--free);border-radius:999px;padding:1px 7px;font-size:10.5px}
.menu .newtag[hidden]{display:none}
.menu .madm{color:#B07A00;border-top:1px solid var(--line);border-radius:0 0 8px 8px;margin-top:2px;justify-content:flex-start}
.menu .madm[hidden]{display:none}
.menu .badge{margin-left:auto}
/* trang riêng (không thuộc 3 thẻ): ẩn ô chọn ngày giờ, thẻ, dải thông báo */
body[class*="pg-"] .panel,body[class*="pg-"] .tabs,body[class*="pg-"] #examBar,body[class*="pg-"] #season{display:none!important}
.rvpage-head{display:flex;justify-content:space-between;align-items:baseline;gap:10px;flex-wrap:wrap;margin-top:8px}
.rvpage-head h2{margin:0;font-size:22px;font-weight:800;letter-spacing:-.01em}
.back{font-size:13.5px;font-weight:700;color:var(--accent);text-decoration:none;white-space:nowrap}
.back:hover{text-decoration:underline}
.rvpage-sub{margin:4px 0 12px}
.rvmode{width:max-content;max-width:100%;margin-bottom:10px}
.rvfeed{display:grid;gap:10px;grid-template-columns:repeat(auto-fill,minmax(min(100%,340px),1fr));align-items:start}
.rvfeed .skel{height:120px}
.rvc{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:12px 14px;display:grid;gap:6px;min-width:0;font-size:14px;content-visibility:auto;contain-intrinsic-size:auto 150px}
.rvc.hid{opacity:.6;border-style:dashed}
.rvc-top{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.rvroom{font-weight:700;font-size:15.5px;color:var(--ink);text-decoration:none;border-bottom:2px solid var(--accent-soft)}
a.rvroom:hover{color:var(--accent);border-color:var(--accent)}
.rvc .pin{font-size:11px;font-weight:800;color:var(--warn);text-transform:uppercase;letter-spacing:.05em}
.rvc .cm{margin:0;white-space:pre-wrap;overflow-wrap:anywhere}
.rvc .tg{display:inline-block;font-size:11.5px;background:var(--soft);border-radius:999px;padding:1px 8px;margin:0 4px 0 0;color:var(--muted)}
.rvc-by{font-size:12.5px;color:var(--muted);overflow-wrap:anywhere}
.rvc-by .nm{color:var(--ink)}
.rvwho{color:inherit;text-decoration:none}
.rvwho:hover .nm,.rvwho:hover .admbadge{text-decoration:underline}
.rvc .admline{font-size:12px;color:var(--muted);overflow-wrap:anywhere}
.rvc .admline .who{font-family:var(--f-mono);color:var(--accent)}
.warn-t{color:var(--accent)}
.phwrap{display:inline-flex;flex-direction:column;gap:4px;align-items:center}
.phact{display:flex;gap:4px;align-items:center;flex-wrap:wrap;justify-content:center;max-width:120px}
.phact .chip{padding:2px 8px;font-size:12px}
.phrep{font-size:11px;color:var(--accent)}
.rvmore{display:flex;justify-content:center;margin:16px 0 4px}
.rvmorebtn{min-width:160px}
.rvend{text-align:center}
.stat.go{font:inherit;color:inherit;text-align:left;cursor:pointer;border-color:var(--accent)}
.stat.go:hover{background:var(--accent-soft)}
.rv.flash{animation:flash 2.2s ease-out}
.rv.flash{border-radius:6px}
@keyframes flash{0%,40%{background:var(--warn-bg);box-shadow:0 0 0 8px var(--warn-bg)}100%{background:transparent;box-shadow:0 0 0 8px transparent}}
.log{list-style:none;margin:12px 0 0;padding:0;display:grid;gap:10px}
.log>li{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:12px 14px}
.log h3{margin:0 0 4px;font-size:15px;display:flex;align-items:center;gap:8px}
.log ul{margin:0;padding-left:20px;display:grid;gap:2px;font-size:14px}
@media (max-width:720px){
  .acctbox .acct{max-width:30vw}
  .online{font-size:10.5px}
  .rvpage-head h2{font-size:19px}
}
@media (max-width:380px){.acctbox .acct{max-width:27vw}.online{font-size:10px;gap:4px}.kebab{width:30px;margin-right:-4px}header.top .wrap{gap:7px}}
@media (prefers-reduced-motion:reduce){.online i,.rv.flash{animation:none}}
/* thanh "Web vừa được cập nhật" (nằm trong dòng chảy trang, không che nội dung) */
.strip.upd{background:var(--free-bg);border-color:transparent;font-weight:600}
.strip.upd[hidden]{display:none}
.xbtn{flex:none;width:30px;height:30px;border:0;border-radius:8px;background:transparent;color:var(--muted);font-size:20px;line-height:1;padding:0}
.xbtn:hover{background:var(--soft);color:var(--ink)}
.logpin{display:grid;gap:2px;margin-top:12px;padding:12px 14px;border-radius:var(--r);border:1px solid var(--accent);background:var(--accent-soft);color:var(--ink);text-decoration:none}
.logpin b{color:var(--accent);font-size:15px}
.logpin span{font-size:13px;color:var(--muted)}
.logpin:hover{filter:brightness(.98)}

/* ===== bản 1.7: đăng nhập tên + mật khẩu, xác thực sinh viên ===== */
.acctsub{display:flex;align-items:center;justify-content:flex-end;gap:6px;min-height:13px;max-width:100%}
.vbadge{border:0;background:rgba(255,255,255,.18);color:var(--accent-ink);border-radius:999px;padding:1px 7px;font-size:10.5px;font-weight:700;line-height:1.35;white-space:nowrap;cursor:pointer}
.vbadge.ok{background:#E3F7EC;color:#146C3F}
.vbadge.no{background:rgba(0,0,0,.18);color:#fff;box-shadow:inset 0 0 0 1px rgba(255,255,255,.45)}
.vbadge[hidden]{display:none}
@media (max-width:720px){.acctsub{flex-direction:column;align-items:flex-end;gap:2px}.vbadge{font-size:10px;padding:0 6px}}
.lgtabs{margin:2px 0 4px}
.lgtabs button{flex:1;padding:7px 10px;font-size:14px}
#lgForm{display:grid;gap:6px}
.pwbox{display:flex;gap:6px;align-items:center}
.pwbox .ctl{flex:1;width:100%}
.eye{flex:none;height:40px;min-width:52px;border:1px solid var(--line);background:var(--bg);border-radius:10px;font-size:13px;font-weight:600;color:var(--muted)}
.eye[aria-pressed="true"]{color:var(--ink)}
.linkbtn{border:0;background:transparent;color:var(--accent);font-size:13px;font-weight:600;padding:2px 0;text-decoration:underline;text-underline-offset:3px;justify-self:start;cursor:pointer}
.cap:empty{display:none}
.cap{min-height:65px}
.vb{display:inline-block;border-radius:999px;padding:1px 8px;font-size:12px;font-weight:700}
.vb.ok{background:var(--free-bg);color:var(--free)}
.vb.no{background:var(--warn-bg);color:var(--warn)}
.vok{font-style:normal;display:inline-grid;place-items:center;width:15px;height:15px;margin-left:4px;border-radius:50%;background:var(--free);color:#fff;font-size:10px;font-weight:800;vertical-align:1px;line-height:1}
.chip.locked,.chipbtn.locked{opacity:.5;cursor:pointer;filter:grayscale(.3)}
.chip.primary-chip.locked[aria-disabled="true"]{opacity:.45}
.lockbox{display:flex;gap:8px;align-items:center;flex-wrap:wrap;border:1px dashed var(--line);border-radius:10px;padding:10px 12px;background:var(--bg)}
.vcode{display:flex;align-items:center;gap:10px;flex-wrap:wrap;background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:10px 12px}
.vcode span{font-size:12.5px;color:var(--muted)}
.vcode b{font-size:20px;letter-spacing:.04em}
.vsteps{margin:0;padding-left:20px;display:grid;gap:8px;font-size:14px}
.vsteps a{color:var(--accent);font-weight:700;overflow-wrap:anywhere}
.vtpl{display:block;margin-top:4px;font-family:var(--f-mono);overflow-wrap:anywhere}
.acinfo{display:grid;grid-template-columns:auto 1fr;gap:6px 12px;margin:0;font-size:14px;align-items:center}
.acinfo dt{color:var(--muted);font-size:12.5px}
.acinfo dd{margin:0;min-width:0;overflow-wrap:anywhere}
#acPwBox{display:grid;gap:6px}
#acPwBox[open]{gap:8px}
.vpanel{display:grid;gap:10px}
.vpanel h4{margin:6px 0 0;font-size:15px}
.vrow{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.vrow .ctl{flex:1 1 180px;min-width:0}
.tmppw{border:1px solid var(--free);background:var(--free-bg);border-radius:10px;padding:10px 12px;display:grid;gap:6px;font-size:14px}
.tmppw #arPw{font-size:18px;letter-spacing:.03em}
.okmsg{color:var(--free);font-weight:700;font-size:14px;margin:0}
.linkbtn[data-seat]{font-size:12.5px}
/* ===== 1.8: mục Phòng học (tất cả phòng, bộ lọc trạng thái, tìm tên phòng, dòng "Bây giờ") ===== */
#phCtl{display:grid;gap:10px;margin:0 0 6px}
.phbar{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.phbar .chips{flex:1 1 auto;min-width:0}
.phq{flex:0 1 260px;min-width:0;width:100%}
.phq input{height:38px;font-size:15px;border-radius:10px;color:var(--ink)}
.phcount{margin:0;font-size:13px;color:var(--muted)}
.phcount b{color:var(--ink)}
.chip.st-free[aria-pressed="true"]{background:var(--free);border-color:var(--free);color:#fff}
.chip.st-busy[aria-pressed="true"]{background:var(--busy-bar);border-color:var(--busy-bar);color:#fff}
.chip.st-sit[aria-pressed="true"]{background:var(--free-bg);border-color:var(--free);color:var(--free)}
.phgrp{margin-top:16px}
.phgrp h3{margin:0 0 8px;font-size:13px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:var(--muted);display:flex;gap:8px;align-items:baseline}
.phgrp h3 span{font-weight:500;letter-spacing:0;text-transform:none}
a.room{color:var(--ink);text-decoration:none;align-content:start;min-width:0;content-visibility:auto;contain-intrinsic-size:auto 118px}
a.room:hover{border-color:var(--muted)}
a.room .code{flex-wrap:wrap;column-gap:8px;row-gap:0}
.room .sl{display:flex;align-items:center;gap:6px;font-size:13px;min-width:0;line-height:1.5}
.room .sl .mono{font-size:12.5px;font-weight:600;white-space:nowrap}
.room .sl small{color:var(--muted);font-size:12px;white-space:nowrap}
.room .sl .nm{color:var(--muted);font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0}
.room .st{font-style:normal;flex:none;font-size:11px;font-weight:700;padding:0 7px;border-radius:999px;line-height:18px}
.room .st.f{background:var(--free-bg);color:var(--free)}
.room .st.b{background:var(--busy-bg);color:var(--busy)}
.room .st.e{background:var(--exam-bg);color:var(--exam)}
.room .nowln{font-size:12px;color:var(--muted);border-top:1px dashed var(--line);margin-top:4px;padding-top:4px;overflow-wrap:anywhere}
.room .nowln .nw{font-weight:700}
.room .nowln .nw.f,.room .nowln .nppl{color:var(--free);font-weight:700}
.room .nowln .nw.b{color:var(--busy)}
@media (max-width:520px){.phq{flex-basis:100%}}
#admWarn{display:grid;gap:6px;margin:0 0 10px;font-size:13px}
#admWarn[hidden]{display:none}
#vfManual{margin-top:12px}
#vfManual .vsteps{margin:8px 0}
#vfS1 .ctx{margin-top:6px}
/* Quản trị · tài khoản (1.8) */
#admTabs{flex-wrap:wrap}
.ulist{display:grid;gap:6px}
.urow{display:grid;grid-template-columns:1fr auto;gap:2px 10px;text-align:left;width:100%;border:1px solid var(--line);border-radius:10px;padding:9px 12px;background:var(--surface);color:var(--ink);font:inherit;cursor:pointer;min-width:0}
.urow:hover{border-color:var(--muted)}
.urow .u1,.urow .u2,.urow .u3{grid-column:1;min-width:0;overflow-wrap:anywhere}
.urow .u2{display:flex;flex-wrap:wrap;gap:4px 6px;align-items:center;font-size:13px}
.urow .u3{font-size:12px}
.urow .go{grid-column:2;grid-row:1/4;align-self:center;font-size:20px;color:var(--muted)}
.urow .who,.usec .who,.ulog .who{font-family:var(--f-mono);color:var(--accent);font-size:13px;overflow-wrap:anywhere}
.ucard{border:1px solid var(--line);border-radius:10px;padding:10px 12px;background:var(--bg);display:grid;gap:8px}
.ucard .uname{font-size:18px}
.ucard .u1{overflow-wrap:anywhere}
.usec{border-top:1px solid var(--line);padding-top:10px;display:grid;gap:6px;min-width:0}
.usec h4{margin:0;font-size:15px}
.usec p{margin:0;overflow-wrap:anywhere}
.usec select.ctl{flex:0 0 auto}
.urv{display:grid;gap:6px}
.urv .ainfo{overflow-wrap:anywhere}
.ulog{list-style:none;margin:0;padding:0;display:grid;gap:6px;font-size:13px}
.ulog li{border-bottom:1px dashed var(--line);padding-bottom:6px;overflow-wrap:anywhere}
.udanger{border-color:var(--accent)}
.udanger summary{color:var(--accent)}
.urv a{color:var(--accent);font-weight:700}
.usec .chip:disabled,.udanger .chip:disabled{opacity:.45;cursor:not-allowed}
/* ===== 1.9 Nhạc nền: nút loa nổi góc dưới phải (music.js). Tên lớp riêng: bgm-*, mu-* ===== */
.bgm{position:fixed;right:max(16px,env(safe-area-inset-right,0px));bottom:calc(16px + env(safe-area-inset-bottom,0px));z-index:14;display:flex;align-items:flex-end;gap:8px}
.bgm[hidden]{display:none}
.bgm-btn{width:48px;height:48px;border-radius:50%;border:1px solid var(--line);background:var(--surface);color:var(--muted);display:grid;place-items:center;box-shadow:0 4px 16px rgba(10,15,22,.18);padding:0;position:relative}
.bgm-btn:hover{border-color:var(--muted);color:var(--ink)}
.bgm.on .bgm-btn{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.bgm.live .bgm-btn::after{content:"";position:absolute;inset:-4px;border-radius:50%;border:2px solid var(--accent);opacity:.5;animation:bgmRing 2s ease-out infinite}
.bgm.wait .bgm-btn{animation:bgmNudge 1.4s ease-in-out infinite}
@keyframes bgmRing{0%{transform:scale(.92);opacity:.55}100%{transform:scale(1.25);opacity:0}}
@keyframes bgmNudge{50%{transform:scale(1.08)}}
.bgm-more{width:34px;height:34px;margin-bottom:7px;border-radius:50%;border:1px solid var(--line);background:var(--surface);color:var(--ink);display:grid;place-items:center;padding:0;box-shadow:0 2px 10px rgba(10,15,22,.14)}
.bgm-more[hidden]{display:none}
.bgm-more[aria-expanded="true"] svg{transform:rotate(180deg)}
.bgm-pop{position:absolute;right:0;bottom:58px;width:min(280px,calc(100vw - 32px));background:var(--surface);color:var(--ink);border:1px solid var(--line);border-radius:12px;box-shadow:0 10px 30px rgba(10,15,22,.2);padding:12px;display:grid;gap:10px}
.bgm-pop[hidden]{display:none}
.bgm-now{display:flex;gap:10px;align-items:center;min-width:0}
.bgm-now>div{min-width:0;display:grid}
.bgm-now b{font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.bgm-now small{font-size:12px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.bgm-eq{flex:none;display:flex;gap:2px;align-items:flex-end;height:16px;width:14px}
.bgm-eq i{flex:1;background:var(--accent);height:100%;border-radius:1px;transform:scaleY(.3);transform-origin:bottom}
.bgm.live .bgm-eq i{animation:bgmEq .9s ease-in-out infinite alternate}
.bgm.live .bgm-eq i:nth-child(2){animation-delay:-.3s}.bgm.live .bgm-eq i:nth-child(3){animation-delay:-.6s}
@keyframes bgmEq{from{transform:scaleY(.25)}to{transform:scaleY(1)}}
.bgm-vol{display:grid;gap:4px;font-size:12px;font-weight:700;color:var(--muted)}
.bgm-vol input{width:100%;accent-color:var(--accent)}
.bgm-row{display:flex;gap:8px;flex-wrap:wrap}
.bgm-ios{margin:0;font-size:12px}
body.has-bgm footer{padding-bottom:64px}
@media (prefers-reduced-motion:reduce){.bgm.live .bgm-btn::after,.bgm.wait .bgm-btn,.bgm.live .bgm-eq i{animation:none}}
@media print{.bgm{display:none}}
/* Quản trị → Nhạc nền */
.mu-sw{display:flex;gap:8px;align-items:center;flex-wrap:wrap;font-weight:600;font-size:14px}
.mu-sw input{width:18px;height:18px;accent-color:var(--accent)}
.mu-up{display:grid;gap:8px}
.mu-up input[type=file]{font-size:13px;max-width:100%}
.mu-list{display:grid;gap:8px}
.mu-item .ainfo{display:grid;gap:4px;min-width:0;width:100%}
.mu-head{overflow-wrap:anywhere}
.mu-edit{display:grid;gap:6px;margin-top:4px}
.mu-edit[hidden]{display:none}
.mupanel input[type=range]{accent-color:var(--accent);max-width:160px}
.tag.on{background:var(--free-bg);color:var(--free)}
.mu-item .chip:disabled{opacity:.4;cursor:not-allowed}