/* ===== Diễn tập thực chiến — giao diện cyber ===== */
:root{
  --bg:#040a16; --bg2:#071326; --panel:rgba(9,24,46,.86); --panel2:rgba(6,17,34,.9);
  --line:#16345a; --line2:#1f4d80; --cy:#3fd4ff; --cy2:#2a9bd8; --txt:#cfe6ff; --mut:#7f9cc0;
  --gold:#ffd24a; --gold2:#e0a81e; --ok:#2ee59d; --bad:#ff4d6d; --warn:#ffb020; --pur:#a57bff;
  --r:10px; --glow:0 0 0 1px rgba(63,212,255,.08),0 0 22px rgba(63,212,255,.12);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--txt);font:14px/1.55 'JetBrains Mono',Consolas,monospace;min-height:100vh;
  background-image:radial-gradient(ellipse at 50% -10%,rgba(40,120,220,.28),transparent 60%),radial-gradient(ellipse at 80% 110%,rgba(20,90,180,.18),transparent 55%)}
#bg{position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.22}
a{color:var(--cy);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{margin:0;font-weight:800;color:var(--cy);text-shadow:0 0 12px rgba(63,212,255,.45)}
small,.mut{color:var(--mut)}

/* ---- header ---- */
.top{position:sticky;top:0;z-index:30;display:flex;align-items:center;gap:14px;padding:8px 22px;background:rgba(2,6,14,.94);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:8px;color:#fff;font-weight:800;font-size:15px;white-space:nowrap}
.brand:hover{text-decoration:none}
.brand-logo{width:30px;height:26px;object-fit:contain}
.caret{font-style:normal;color:var(--cy);animation:blink 1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}
.top nav{margin-left:auto;display:flex;align-items:center;gap:4px;flex-wrap:wrap}
.top nav a,.top nav .who{color:#dbe9ff;padding:6px 10px;border-radius:8px;font-size:13px;display:flex;align-items:center;gap:6px}
.top nav a:hover{background:rgba(63,212,255,.1);text-decoration:none}
.top nav a.on{color:var(--cy);box-shadow:inset 0 -2px 0 var(--cy)}
.top nav .pill{border:1px solid var(--cy);border-radius:20px;padding:5px 14px;color:var(--cy);margin-left:6px}
.burger{display:none;margin-left:auto;background:none;border:1px solid var(--line2);color:var(--cy);font-size:18px;border-radius:8px;padding:2px 10px;cursor:pointer}

.marquee{position:relative;z-index:2;overflow:hidden;background:linear-gradient(90deg,#06142a,#0a2248,#06142a);border-bottom:1px solid var(--line);
  font-weight:800;letter-spacing:2px;color:var(--cy);text-shadow:0 0 10px var(--cy);font-size:13px;white-space:nowrap}
.mq-track{display:inline-flex;gap:30px;padding:7px 0;animation:mq 40s linear infinite}
@keyframes mq{to{transform:translateX(-50%)}}

.wrap{position:relative;z-index:2;max-width:1040px;margin:0 auto;padding:26px 18px 40px}
.wrap.narrow{max-width:760px}
.foot{position:relative;z-index:2;text-align:center;color:#3f5c80;font-size:12px;padding:20px 10px 30px}

/* ---- panel ---- */
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:18px 20px;box-shadow:var(--glow);margin-bottom:16px;backdrop-filter:blur(3px)}
.card.hl{border-color:var(--line2);box-shadow:0 0 0 1px rgba(63,212,255,.2),0 0 30px rgba(63,212,255,.18)}
.card-h{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px}
.card-h h3{font-size:15px}
.grid2{display:grid;grid-template-columns:1.55fr 1fr;gap:16px}
.grid2 > *{min-width:0}
.row{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:12px}
.flex{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.sp{flex:1}

/* ---- form ---- */
label{display:block;font-weight:600;font-size:13px;margin:10px 0 5px;color:#dbe9ff}
label .mut{font-weight:400}
input[type=text],input[type=password],input[type=number],input[type=datetime-local],select,textarea{
  width:100%;background:#01050c;border:1px solid var(--line);color:#e8f3ff;border-radius:8px;padding:10px 12px;font:inherit;outline:none;transition:.15s}
input:focus,select:focus,textarea:focus{border-color:var(--cy);box-shadow:0 0 0 2px rgba(63,212,255,.18),0 0 18px rgba(63,212,255,.25)}
textarea{min-height:90px;resize:vertical}
.inp-ic{position:relative}
.inp-ic > span{position:absolute;left:11px;top:50%;transform:translateY(-50%);opacity:.7}
.inp-ic input{padding-left:34px}
.inp-ic .eye{left:auto;right:10px;cursor:pointer;opacity:.6}
.chk{display:flex;gap:8px;align-items:center;font-weight:400}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;background:rgba(63,212,255,.08);border:1px solid var(--cy2);color:var(--cy);
  border-radius:8px;padding:9px 16px;font:700 12px 'JetBrains Mono',monospace;letter-spacing:1px;text-transform:uppercase;cursor:pointer;transition:.15s;white-space:nowrap}
.btn:hover{background:rgba(63,212,255,.2);box-shadow:0 0 16px rgba(63,212,255,.35);text-decoration:none}
.btn.pri{background:linear-gradient(180deg,#43d7ff,#1fa6e0);color:#021528;border-color:#6fe1ff}
.btn.pri:hover{box-shadow:0 0 22px rgba(63,212,255,.6)}
.btn.bad{border-color:#8c2a3d;color:#ff7890;background:rgba(255,77,109,.08)}
.btn.bad:hover{background:rgba(255,77,109,.2)}
.btn.gold{border-color:var(--gold2);color:var(--gold);background:rgba(255,210,74,.08)}
.btn.sm{padding:5px 10px;font-size:11px}
.btn.block{width:100%;padding:12px}
.btn:disabled{opacity:.45;cursor:not-allowed;box-shadow:none}
.alert{border:1px solid;border-radius:8px;padding:10px 14px;margin-bottom:14px}
.alert.ok{border-color:#1d7a55;background:rgba(46,229,157,.08);color:#9ff5cf}
.alert.err{border-color:#8c2a3d;background:rgba(255,77,109,.08);color:#ffb3c0}
.alert.warn{border-color:#8a6212;background:rgba(255,176,32,.08);color:#ffd48a}
.tag{display:inline-flex;align-items:center;gap:4px;font-size:11px;padding:1px 8px;border-radius:12px;background:rgba(255,210,74,.14);color:var(--gold);border:1px solid rgba(255,210,74,.35);white-space:nowrap}
.tag.cy{background:rgba(63,212,255,.1);color:var(--cy);border-color:rgba(63,212,255,.3)}
.tag.red{background:rgba(255,77,109,.12);color:#ff7890;border-color:rgba(255,77,109,.35)}
.tag.ok{background:rgba(46,229,157,.1);color:var(--ok);border-color:rgba(46,229,157,.35)}
.live-dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--bad);box-shadow:0 0 8px var(--bad);animation:pulse 1.2s infinite}
@keyframes pulse{50%{opacity:.3}}

/* ---- avatar ---- */
.av{--c:#2f7bff;display:inline-grid;place-items:center;width:30px;height:30px;border-radius:50%;flex:none;font-weight:800;font-size:13px;color:#fff;
  background:radial-gradient(circle at 35% 30%,color-mix(in srgb,var(--c) 60%,#fff),var(--c) 60%,color-mix(in srgb,var(--c) 60%,#000));box-shadow:0 0 10px color-mix(in srgb,var(--c) 50%,transparent)}
.av.sm{width:22px;height:22px;font-size:11px}
.av.md{width:44px;height:44px;font-size:18px}
.av.lg{width:78px;height:78px;font-size:32px;border:3px solid rgba(255,255,255,.2)}

/* ---- countdown ---- */
.cd{background:#020814;border:1px solid var(--line2);border-radius:10px;padding:8px 16px;text-align:center;min-width:150px}
.cd small{display:block;font-size:10px;letter-spacing:2px;color:#9fc6ef;font-weight:700}
.cd-t{display:block;font-size:30px;font-weight:800;color:var(--cy);text-shadow:0 0 14px var(--cy);letter-spacing:2px;line-height:1.2}
.cd-bar{display:block;height:4px;background:#0b2240;border-radius:3px;margin:4px 0;overflow:hidden}
.cd-bar i{display:block;height:100%;width:100%;background:linear-gradient(90deg,var(--ok),var(--cy));transition:width 1s linear}
.cd-sub{font-size:10px;color:var(--mut);font-style:normal}
.cd.low .cd-t{color:var(--bad);text-shadow:0 0 14px var(--bad);animation:pulse 1s infinite}
.cd.low .cd-bar i{background:var(--bad)}

/* ---- login ---- */
.login{display:grid;grid-template-columns:1.1fr .9fr;gap:34px;align-items:start;padding-top:10px}
.login .hero-logo{width:118px;height:96px;object-fit:contain;filter:drop-shadow(0 0 16px rgba(255,210,74,.5))}
.login .org{color:var(--gold);font-weight:800;letter-spacing:2px;margin:12px 0 4px}
.login h1{font-size:clamp(30px,4.5vw,46px);line-height:1.25;color:var(--cy)}
.login .dept{color:var(--cy);font-weight:800;letter-spacing:2px;font-size:13px;margin:10px 0 16px}
.steps{list-style:none;padding:0;margin:16px 0 0;display:grid;gap:8px}
.steps li{display:flex;gap:12px;align-items:flex-start;background:var(--panel2);border:1px solid var(--line);border-radius:8px;padding:10px 12px}
.steps b.n{flex:none;width:26px;height:26px;border-radius:50%;display:grid;place-items:center;background:var(--cy);color:#021528}
.tabs{display:flex;gap:6px;background:#020814;border:1px solid var(--line);border-radius:10px;padding:4px;margin-bottom:14px}
.tabs a,.tabs button{flex:1;text-align:center;padding:8px;border-radius:7px;color:#bcd6f5;background:none;border:0;font:inherit;cursor:pointer}
.tabs .on{background:linear-gradient(180deg,#43d7ff,#1fa6e0);color:#021528;font-weight:800}
.tabs a:hover{text-decoration:none}

/* ---- board ---- */
.hero{display:flex;gap:18px;align-items:center}
.hero .hero-logo{width:92px;height:74px;object-fit:contain;flex:none;filter:drop-shadow(0 0 12px rgba(255,210,74,.5))}
.hero .org{color:var(--gold);font-weight:800;letter-spacing:1px;font-size:12px}
.hero h1{font-size:24px}
.hero .dept{color:var(--cy);font-weight:800;letter-spacing:1.5px;font-size:14px;margin:2px 0 8px}
.chips{display:flex;gap:8px;flex-wrap:wrap}
.chip{font-size:11px;padding:3px 10px;border-radius:14px;background:#06162c;border:1px solid var(--line)}
.chip.live{color:#ff8da0;border-color:#6b2437}
.ctrl{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.ctrl .lab{color:var(--cy);font-weight:700;margin-right:6px}
.podium{display:grid;grid-template-columns:1fr 1.15fr 1fr;gap:12px;align-items:end;margin-bottom:16px}
.pod{display:flex;align-items:center;gap:12px;padding:14px;border-radius:12px;background:var(--panel);border:1px solid var(--line);transition:.3s}
.pod .info{flex:1;min-width:0}
.pod .info b{display:block;font-size:15px;color:#fff;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.pod .info small{font-size:11px}
.pod .rk{font-size:10px;letter-spacing:1px;color:var(--mut)}
.pod .pts{text-align:right}
.pod .pts b{display:block;font-size:28px;font-weight:800;line-height:1}
.pod .pts small{font-size:10px}
.pod.p1{border:2px solid var(--gold);box-shadow:0 0 26px rgba(255,210,74,.35);padding:20px 14px;background:linear-gradient(180deg,rgba(255,210,74,.12),var(--panel))}
.pod.p1 .pts b{color:var(--gold);text-shadow:0 0 12px var(--gold)}
.pod.p1 .rk{color:#021528;background:var(--gold);padding:0 6px;border-radius:4px;font-weight:800;display:inline-block}
.pod.p2{border-color:#b9c7d8;box-shadow:0 0 16px rgba(185,199,216,.2)}
.pod.p3{border-color:#c77c3a;box-shadow:0 0 16px rgba(199,124,58,.2)}
.pod.empty{opacity:.55}
.pod.empty .av{background:#1a2a44;box-shadow:none}
.bars{display:grid;gap:10px}
.bar-row{display:grid;grid-template-columns:30px 30px minmax(90px,1fr) 2fr 34px;gap:10px;align-items:center}
.bar-row .medal{text-align:center;font-weight:800;color:var(--mut)}
.bar-row .nm{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-weight:600}
.bar-row .bar{height:12px;background:#07172d;border-radius:6px;overflow:hidden}
.bar-row .bar i{display:block;height:100%;width:0;border-radius:6px;background:linear-gradient(90deg,#1b6fd6,#3fd4ff);box-shadow:0 0 12px rgba(63,212,255,.5);transition:width .8s cubic-bezier(.2,.8,.2,1)}
.bar-row .sc{text-align:right;font-weight:800;font-size:16px}
.bar-row.me{background:rgba(255,210,74,.07);border-radius:8px;outline:1px solid rgba(255,210,74,.35)}
.feed{display:grid;gap:8px;max-height:520px;overflow:auto;padding-right:4px}
.fi{border:1px solid #1d5a4a;border-left:3px solid var(--ok);border-radius:8px;padding:8px 10px;background:rgba(46,229,157,.05);animation:slidein .5s}
.fi .t{display:flex;align-items:center;gap:6px;font-weight:700;font-size:12px}
.fi .t time{margin-left:auto;color:var(--mut);font-weight:400;font-size:11px}
.fi .q{font-size:11px;color:#bcd6f5;margin:4px 0}
.fi .a{display:flex;justify-content:space-between;align-items:center;font-size:12px;color:var(--ok);background:rgba(46,229,157,.08);padding:3px 8px;border-radius:5px}
@keyframes slidein{from{opacity:0;transform:translateX(20px)}}
table.tb{width:100%;border-collapse:collapse;font-size:13px}
.tb th{text-align:left;color:var(--cy);font-weight:700;padding:9px 8px;background:#06142a;border-bottom:1px solid var(--line2);font-size:12px}
.tb td{padding:9px 8px;border-bottom:1px solid #0e2440;vertical-align:middle}
.tb tr:hover td{background:rgba(63,212,255,.04)}
.tbl-wrap{overflow-x:auto}
details.more > summary{cursor:pointer;color:var(--cy);font-weight:700;padding:4px 0;list-style:none}
details.more > summary::before{content:'▸ ';}
details.more[open] > summary::before{content:'▾ ';}

/* ---- team page ---- */
.team-hero{display:flex;gap:18px;align-items:center;padding:22px;border-radius:14px;border:1px solid var(--line2);
  background:linear-gradient(120deg,color-mix(in srgb,var(--tc) 22%,transparent),rgba(9,24,46,.9) 55%);box-shadow:0 0 30px color-mix(in srgb,var(--tc) 25%,transparent);margin-bottom:16px}
.team-hero .who2{flex:1;min-width:0}
.team-hero .kicker{font-size:11px;letter-spacing:2px;color:var(--mut)}
.team-hero h1{font-size:30px;color:#fff;text-shadow:0 0 14px color-mix(in srgb,var(--tc) 70%,transparent)}
.big-box{background:#020814;border:1px solid var(--line2);border-radius:10px;padding:8px 14px;text-align:center;min-width:86px}
.big-box b{display:block;font-size:30px;font-weight:800;line-height:1.1;color:#fff}
.big-box small{font-size:10px}
.tiles{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:16px}
.tile{display:flex;gap:12px;align-items:center;background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:14px}
.tile .ic{font-size:22px}
.tile b{display:block;font-size:22px;color:#fff;line-height:1}
.tile small{font-size:11px}
.prog{height:8px;background:#07172d;border-radius:5px;overflow:hidden;margin-top:10px}
.prog i{display:block;height:100%;background:linear-gradient(90deg,var(--cy2),var(--cy));box-shadow:0 0 10px var(--cy)}
.exam-item{display:flex;gap:12px;align-items:center;border:1px solid var(--line);border-left:3px solid var(--gold);border-radius:8px;padding:12px;background:var(--panel2);margin-bottom:8px}
.exam-item .sp b{color:#fff}
.exam-item .pts{text-align:right}
.exam-item .pts b{font-size:20px;color:#fff}
.rank-list{display:grid;gap:6px}
.rank-list .it{display:flex;align-items:center;gap:8px;padding:7px 10px;border-radius:8px;background:var(--panel2);border:1px solid transparent}
.rank-list .it.me{border-color:var(--gold);box-shadow:0 0 12px rgba(255,210,74,.25)}
.rank-list .it b{margin-left:auto}

/* ---- exam ---- */
.exam-head{display:flex;gap:14px;align-items:center}
.exam-head h2{font-size:18px}
.score-now{display:flex;align-items:center;gap:6px;font-weight:800}
.score-now b{font-size:22px;color:var(--ok);text-shadow:0 0 10px var(--ok)}
.qcard{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:16px 18px;margin-bottom:12px;transition:.2s}
.qcard.ok{border-color:#1d7a55}
.qcard.no{border-color:#7a2436}
.qcard .qt{font-weight:700;margin-bottom:10px;white-space:pre-wrap}
.qcard .qt .n{color:#fff}
.ans-row{display:flex;gap:8px}
.ans-row input{flex:1}
.opts{display:grid;gap:8px;margin-bottom:10px}
.opt{display:flex;gap:10px;align-items:center;padding:9px 12px;border:1px solid var(--line);border-radius:8px;background:#020814;cursor:pointer;transition:.12s}
.opt:hover{border-color:var(--cy2)}
.opt input{accent-color:var(--cy)}
.opt .k{font-weight:800;color:var(--cy)}
.opt.sel{border-color:var(--cy);background:rgba(63,212,255,.08)}
.st{font-size:12px;margin-top:8px;display:flex;gap:6px;align-items:center}
.st.ok{color:var(--ok)}
.st.no{color:#ff7890}
.st.wait{color:var(--mut)}
.exam-foot{display:flex;justify-content:center;align-items:center;gap:16px;background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:14px;position:sticky;bottom:10px}
.lock{padding:40px 20px;text-align:center}
.lock .big{font-size:48px}

/* ---- admin ---- */
.atabs{display:flex;gap:4px;flex-wrap:wrap;border-bottom:1px solid var(--line);margin:14px 0 18px}
.atabs a{padding:9px 14px;color:#bcd6f5;border-bottom:2px solid transparent}
.atabs a.on{color:var(--cy);border-bottom-color:var(--cy);background:rgba(63,212,255,.06)}
.atabs a:hover{text-decoration:none;color:#fff}
.drop{border:2px dashed var(--line2);border-radius:12px;padding:30px;text-align:center;cursor:pointer;transition:.2s;background:rgba(3,12,26,.6)}
.drop:hover,.drop.over{border-color:var(--cy);background:rgba(63,212,255,.06)}
.drop .ic{font-size:40px}
.drop .fmts{display:flex;gap:6px;justify-content:center;margin-top:8px;flex-wrap:wrap}
.drop .fmts span{font-size:11px;border:1px solid var(--line);border-radius:6px;padding:2px 8px;color:var(--mut)}
.drop .files{margin-top:8px;color:var(--gold)}
.qlist .qi{border:1px solid var(--line);border-radius:8px;padding:10px 12px;margin-bottom:8px;background:var(--panel2)}
.qlist .qi .ansv{margin-top:6px;padding:5px 10px;border-radius:6px;background:rgba(46,229,157,.1);color:var(--ok);font-size:13px}
.qlist .qi .opt-l{font-size:13px;color:#bcd6f5}
.qlist .qi .opt-l.c{color:var(--ok);font-weight:700}
code,pre{font-family:inherit;background:#020814;border:1px solid var(--line);border-radius:6px}
pre{padding:10px;white-space:pre-wrap;font-size:12px}
code{padding:1px 5px}

/* ---- celebration ---- */
#celebrate{position:fixed;inset:0;z-index:100;display:none;place-items:center;text-align:center;overflow:hidden;
  background:radial-gradient(circle at 50% 45%,#ffb347 0%,#e36b00 45%,#6b2a00 100%)}
#celebrate.on{display:grid;animation:cin .35s ease-out}
@keyframes cin{from{opacity:0;transform:scale(1.08)}}
#celebrate canvas{position:absolute;inset:0}
#celebrate .inner{position:relative;z-index:2}
#celebrate .roar{font-size:clamp(40px,8vw,84px);font-weight:800;color:#fff;letter-spacing:4px;text-shadow:0 6px 0 #a33d00,0 0 30px rgba(255,255,255,.6);animation:shake .4s infinite}
#celebrate .mascot{font-size:clamp(120px,22vw,220px);line-height:1;animation:bounce .8s ease-in-out infinite;filter:drop-shadow(0 12px 18px rgba(0,0,0,.4))}
#celebrate .crown{font-size:44px;margin-top:-10px}
#celebrate .tname{font-size:clamp(40px,8vw,80px);font-weight:800;color:#ffe9b0;letter-spacing:6px;text-shadow:0 5px 0 #8a3200,0 0 30px #ffd24a}
#celebrate .tsub{font-size:clamp(16px,2.6vw,26px);font-weight:800;color:#fff4d6;letter-spacing:4px}
@keyframes bounce{50%{transform:translateY(-18px) scale(1.04)}}
@keyframes shake{25%{transform:rotate(-2deg)}75%{transform:rotate(2deg)}}

#toast{position:fixed;right:18px;bottom:18px;z-index:90;display:grid;gap:8px}
#toast div{background:#06142a;border:1px solid var(--cy2);color:#dff;padding:10px 14px;border-radius:8px;box-shadow:0 0 20px rgba(63,212,255,.3);animation:slidein .3s}
#toast div.err{border-color:var(--bad);color:#ffc0cb}

.modal{position:fixed;inset:0;z-index:80;background:rgba(0,0,0,.7);display:none;place-items:center;padding:16px}
.modal.on{display:grid}
.modal .card{max-width:460px;width:100%}
.emo-grid{display:grid;grid-template-columns:repeat(8,1fr);gap:6px}
.emo-grid button{font-size:20px;background:#020814;border:1px solid var(--line);border-radius:8px;padding:6px;cursor:pointer;color:#fff;font-family:inherit}
.emo-grid button.on,.emo-grid button:hover{border-color:var(--cy)}
.colors{display:flex;gap:6px;flex-wrap:wrap;margin-top:8px}
.colors button{width:28px;height:28px;border-radius:50%;border:2px solid transparent;cursor:pointer}
.colors button.on{border-color:#fff}

/* ---- responsive ---- */
@media (max-width:860px){
  .grid2,.login{grid-template-columns:1fr}
  .tiles{grid-template-columns:repeat(2,1fr)}
  .podium{grid-template-columns:1fr}
  .podium .p1{order:-1}
  .hero{flex-wrap:wrap}
  .team-hero{flex-wrap:wrap}
}
@media (max-width:640px){
  .top{flex-wrap:wrap;padding:8px 14px}
  .burger{display:block}
  .top nav{display:none;width:100%}
  body.navopen .top nav{display:flex;flex-direction:column;align-items:stretch}
  .wrap{padding:18px 12px 30px}
  .bar-row{grid-template-columns:24px 26px 1fr 40px}
  .bar-row .bar{grid-column:1/-1;order:5}
  .exam-head{flex-wrap:wrap}
  .ans-row{flex-direction:column}
}

/* =====================================================================
   GIAO DIỆN "HACKER CNTT" — NỀN XANH DƯƠNG, CHỮ TRẮNG
   (mạch điện tử + lưới + tia quét + mưa mã nhị phân)
   ===================================================================== */
:root{
  --bg:#062a6e; --bg2:#08358a; --panel:rgba(3,24,74,.74); --panel2:rgba(2,18,58,.8);
  --line:rgba(120,190,255,.28); --line2:rgba(140,210,255,.6); --cy:#8fe6ff; --cy2:#4cc3ff;
  --txt:#ffffff; --mut:#b9d4f5;
  --glow:0 0 0 1px rgba(143,230,255,.12),0 0 26px rgba(76,195,255,.22);
}
body{background:linear-gradient(160deg,#0b3f9c 0%,#062a6e 42%,#031a4c 100%) fixed;color:#fff}
body::before{content:'';position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.2;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><g fill='none' stroke='%23a8e2ff' stroke-width='1.3' stroke-linecap='round'><path d='M0 24h46l12 12h52l10-10h80'/><path d='M110 36v44l12 12h78'/><path d='M24 0v58l12 12v50l-10 10H0'/><path d='M70 200v-46l-12-12H14'/><path d='M150 0v30l-12 12v56l12 12h50'/><path d='M200 150h-58l-12 12v38'/><path d='M46 104h36l12-12h16'/><path d='M94 200v-30l14-14h30'/><path d='M180 60v20'/></g><g fill='%23a8e2ff'><circle cx='110' cy='36' r='3.5'/><circle cx='24' cy='58' r='3.5'/><circle cx='122' cy='92' r='3'/><circle cx='58' cy='142' r='3'/><circle cx='138' cy='42' r='3'/><circle cx='142' cy='162' r='3'/><circle cx='110' cy='92' r='2.5'/><circle cx='138' cy='156' r='3'/><circle cx='180' cy='60' r='3'/><circle cx='180' cy='80' r='3'/></g><g fill='none' stroke='%23a8e2ff'><rect x='76' y='118' width='28' height='20' rx='2'/><rect x='160' y='112' width='20' height='28' rx='2'/></g></svg>");
  background-size:200px 200px}
body::after{content:'';position:fixed;inset:0;z-index:0;pointer-events:none;
  background:
    linear-gradient(180deg,transparent 0%,rgba(150,225,255,.10) 49%,rgba(190,240,255,.28) 50%,rgba(150,225,255,.10) 51%,transparent 100%) 0 -100vh/100% 60vh no-repeat,
    repeating-linear-gradient(0deg,rgba(160,215,255,.07) 0 1px,transparent 1px 40px),
    repeating-linear-gradient(90deg,rgba(160,215,255,.07) 0 1px,transparent 1px 40px),
    radial-gradient(ellipse at 50% 0%,rgba(120,200,255,.25),transparent 60%),
    radial-gradient(ellipse at 50% 120%,rgba(0,8,30,.7),transparent 60%);
  animation:scanbar 7s linear infinite}
@keyframes scanbar{from{background-position:0 -60vh,0 0,0 0,0 0,0 0}to{background-position:0 160vh,0 0,0 0,0 0,0 0}}
#bg{opacity:.4}

h1,h2,h3{color:#fff;text-shadow:0 0 6px rgba(143,230,255,.8),0 0 22px rgba(76,195,255,.55)}
a{color:#bff0ff}
small,.mut{color:var(--mut)}
.top{background:rgba(2,18,58,.92);border-bottom:1px solid var(--line2);box-shadow:0 2px 20px rgba(0,10,40,.5)}
.top nav a,.top nav .who{color:#fff}
.top nav a.on{color:#fff;box-shadow:inset 0 -2px 0 var(--cy);text-shadow:0 0 10px var(--cy)}
.top nav .pill{color:#fff;border-color:var(--cy);background:rgba(76,195,255,.15)}
.marquee{background:linear-gradient(90deg,#03245f,#0a4cb8,#03245f);color:#fff;text-shadow:0 0 10px rgba(143,230,255,.9);border-bottom:1px solid var(--line2)}
.card{background:var(--panel);border-color:var(--line2);backdrop-filter:blur(4px)}
.card.hl{box-shadow:0 0 0 1px rgba(143,230,255,.35),0 0 34px rgba(76,195,255,.3)}
.hero .dept,.login .dept{color:#fff;text-shadow:0 0 12px rgba(143,230,255,.8)}
.login h1{color:#fff}
.chip{background:rgba(2,18,58,.8);border-color:var(--line2);color:#fff}
.cd{background:rgba(1,12,40,.85);border-color:var(--line2)}
.cd small{color:#d6ecff}
.cd-t{color:#fff;text-shadow:0 0 10px var(--cy),0 0 24px var(--cy2)}
input[type=text],input[type=password],input[type=number],input[type=datetime-local],select,textarea{background:rgba(0,10,36,.78);border-color:var(--line2);color:#fff}
input::placeholder,textarea::placeholder{color:#8fb3dc}
label{color:#fff}
.btn{color:#fff;border-color:var(--cy);background:rgba(76,195,255,.14)}
.btn.pri{background:linear-gradient(180deg,#9aeaff,#39b8f5);color:#021a44;border-color:#c9f3ff}
.tabs{background:rgba(1,12,40,.8);border-color:var(--line2)}
.tabs a,.tabs button{color:#fff}
.tabs .on{background:linear-gradient(180deg,#9aeaff,#39b8f5);color:#021a44}
.steps li{background:var(--panel2);border-color:var(--line)}
.steps b.n{background:#fff;color:#062a6e}
.pod{background:var(--panel)}
.pod .info b,.bar-row .nm,.tile b,.big-box b{color:#fff}
.bar-row .bar{background:rgba(1,12,40,.7)}
.bar-row .bar i{background:linear-gradient(90deg,#4cc3ff,#ffffff);box-shadow:0 0 14px rgba(143,230,255,.7)}
.tb th{background:rgba(2,24,72,.9);color:#fff;border-bottom-color:var(--line2)}
.tb td{border-bottom-color:var(--line)}
.fi{background:rgba(46,229,157,.08)}
.fi .q{color:#e3f1ff}
.atabs a{color:#dcecff}
.atabs a.on{color:#fff;border-bottom-color:var(--cy)}
.opt{background:rgba(0,10,36,.7);color:#fff}
.opt .k{color:var(--cy)}
.qcard,.exam-foot,.tile,.exam-item,.rank-list .it{background:var(--panel)}
.foot{color:#a9c9ee}
#toast div{background:#062a6e;border-color:var(--cy)}

/* ===== Logo có 2 vòng hiệu ứng xoay ===== */
.logo-orb{position:relative;display:inline-grid;place-items:center;flex:none;width:120px;height:120px}
.logo-orb > img{position:relative;z-index:1;width:70%!important;height:auto!important;object-fit:contain;filter:drop-shadow(0 0 10px rgba(255,210,74,.55))}
.logo-orb .ring{position:absolute;border-radius:50%;pointer-events:none}
/* vòng ngoài: các cung xanh sáng, quay thuận */
.logo-orb .r1{inset:0;
  background:conic-gradient(from 0deg,#8fe6ff 0 70deg,transparent 70deg 95deg,#8fe6ff 95deg 150deg,transparent 150deg 180deg,#8fe6ff 180deg 250deg,transparent 250deg 275deg,#8fe6ff 275deg 330deg,transparent 330deg 360deg);
  -webkit-mask:radial-gradient(farthest-side,transparent calc(100% - 3px),#000 calc(100% - 3px));
          mask:radial-gradient(farthest-side,transparent calc(100% - 3px),#000 calc(100% - 3px));
  filter:drop-shadow(0 0 6px #4cc3ff) drop-shadow(0 0 12px #4cc3ff);animation:orbspin 6s linear infinite}
/* vòng trong: vạch đứt vàng kiểu la bàn, quay ngược */
.logo-orb .r2{inset:9%;
  background:repeating-conic-gradient(#ffd24a 0 4deg,transparent 4deg 12deg);
  -webkit-mask:radial-gradient(farthest-side,transparent calc(100% - 4px),#000 calc(100% - 4px));
          mask:radial-gradient(farthest-side,transparent calc(100% - 4px),#000 calc(100% - 4px));
  filter:drop-shadow(0 0 4px rgba(255,210,74,.9));opacity:.9;animation:orbspin 10s linear infinite reverse}
.logo-orb::after{content:'';position:absolute;inset:14%;border-radius:50%;background:radial-gradient(circle,rgba(76,195,255,.28),transparent 70%);animation:orbpulse 2.4s ease-in-out infinite}
@keyframes orbspin{to{transform:rotate(360deg)}}
@keyframes orbpulse{50%{transform:scale(1.12);opacity:.5}}
.orb-hero-logo{width:122px;height:122px}
.login .orb-hero-logo{width:150px;height:150px}
.orb-brand-logo{width:40px;height:40px;margin:-6px 0}
.orb-brand-logo .r1{-webkit-mask:radial-gradient(farthest-side,transparent calc(100% - 2px),#000 calc(100% - 2px));mask:radial-gradient(farthest-side,transparent calc(100% - 2px),#000 calc(100% - 2px))}
.orb-brand-logo .r2{inset:12%;-webkit-mask:radial-gradient(farthest-side,transparent calc(100% - 2px),#000 calc(100% - 2px));mask:radial-gradient(farthest-side,transparent calc(100% - 2px),#000 calc(100% - 2px))}
.orb-brand-logo > img{width:64%!important}

/* ===== Top 3: nhãn HẠNG to rõ + huy chương + hiệu ứng cúp ===== */
.pod{position:relative;overflow:visible;border-top-width:3px}
.pod.p1{border-color:#ffd24a;border-top-color:#ffe680}
.pod.p2{border-color:#c9d6e6;border-top-color:#ffffff}
.pod.p3{border-color:#e0904a;border-top-color:#ffb870}
.pod .rk{display:block;white-space:nowrap;font-size:16px;font-weight:800;letter-spacing:1.5px;margin-bottom:4px;line-height:1.3;background:none;padding:0;box-shadow:none}
.pod.p1 .rk{font-size:18px;color:#ffd24a;background:none;padding:0;border-radius:0;text-shadow:0 0 10px rgba(255,210,74,.7)}
.pod.p2 .rk{color:#e9f1fb;text-shadow:0 0 8px rgba(214,226,240,.5)}
.pod.p3 .rk{color:#ffa45c;text-shadow:0 0 8px rgba(255,150,70,.5)}
.pod.empty .rk{color:#cfe0f5}
.pod .rk .crown{display:inline-block;animation:crownb 1.6s ease-in-out infinite}
@keyframes crownb{50%{transform:translateY(-3px) rotate(-8deg)}}
.pod .info b{font-size:17px}
.pod.p1 .info b{font-size:19px}
/* huy chương số trên ảnh đại diện */
.avw{position:relative;display:inline-grid;flex:none}
.pod .av.md{width:52px;height:52px;font-size:20px}
.pod.p1 .av.md{width:60px;height:60px;font-size:24px}
.medal-b{position:absolute;right:-4px;bottom:-4px;width:22px;height:22px;border-radius:50%;display:grid;place-items:center;font-size:12px;font-weight:800;border:2px solid #0a1f4d}
.medal-b.m1{background:radial-gradient(circle at 35% 30%,#fff3b0,#ffc21a 60%,#b37a00);color:#3a2400;box-shadow:0 0 10px rgba(255,200,40,.8)}
.medal-b.m2{background:radial-gradient(circle at 35% 30%,#ffffff,#c9d6e6 60%,#7d8ea3);color:#1b2635}
.medal-b.m3{background:radial-gradient(circle at 35% 30%,#ffd2a8,#d9843f 60%,#8a4a17);color:#2a1200}
.pod.empty .medal-b{display:none}
/* cúp vàng phát sáng ở Hạng 1 */
.cup{position:relative;display:grid;place-items:center;width:56px;height:56px;flex:none;margin-right:6px}
.cup::before{content:'';position:absolute;inset:4px;border-radius:50%;background:radial-gradient(circle,rgba(255,215,80,.55),rgba(255,180,0,.12) 55%,transparent 72%);animation:cupglow 1.8s ease-in-out infinite}
.cup-i{position:relative;display:block;width:48px;height:50px;background:url(img/cup.webp) center/contain no-repeat;
  filter:drop-shadow(0 0 5px rgba(255,210,74,.85)) drop-shadow(0 0 14px rgba(255,170,0,.45)) drop-shadow(0 3px 2px rgba(0,0,0,.5));animation:cupfloat 2.4s ease-in-out infinite}
.cup-i::after{content:'';position:absolute;inset:0;
  background:linear-gradient(105deg,transparent 42%,rgba(255,255,255,.9) 50%,transparent 58%) 0 0/300% 100% no-repeat;
  -webkit-mask:url(img/cup.webp) center/contain no-repeat;mask:url(img/cup.webp) center/contain no-repeat;animation:cupshine 2.8s ease-in-out infinite}
@keyframes cupshine{0%,50%{background-position:100% 0}100%{background-position:0 0}}
.spk{position:absolute;font-style:normal;color:#fff6c8;text-shadow:0 0 6px #ffd24a,0 0 12px #ffb300;font-size:12px;opacity:0;animation:twinkle 1.8s ease-in-out infinite}
.spk.k1{top:2px;left:6px}
.spk.k2{top:10px;right:2px;font-size:9px;animation-delay:.6s}
.spk.k3{bottom:8px;left:2px;font-size:10px;animation-delay:1.2s}
@keyframes cupglow{50%{transform:scale(1.18);opacity:.55}}
@keyframes cupfloat{0%,100%{transform:translateY(0) rotate(-3deg)}50%{transform:translateY(-4px) rotate(3deg)}}
@keyframes twinkle{0%,100%{opacity:0;transform:scale(.4) rotate(0)}50%{opacity:1;transform:scale(1.2) rotate(90deg)}}
@media (max-width:640px){.pod .rk{font-size:14px}.pod.p1 .rk{font-size:16px}.cup{width:46px;height:46px}.cup-i{width:40px;height:42px}}

/* ===== Logo dạng huy hiệu tròn viền vàng phát sáng (theo ảnh mẫu) ===== */
.logo-orb::before{content:'';position:absolute;inset:15%;border-radius:50%;z-index:0;
  background:radial-gradient(circle at 50% 38%,#12306e 0%,#0a1c46 55%,#050f2a 100%);
  border:3px solid #e6b422;
  box-shadow:0 0 0 2px rgba(255,226,122,.35),0 0 14px rgba(255,200,60,.75),0 0 30px rgba(255,180,0,.35),inset 0 0 16px rgba(255,210,74,.35);
  animation:medglow 2.6s ease-in-out infinite}
@keyframes medglow{50%{box-shadow:0 0 0 2px rgba(255,226,122,.55),0 0 22px rgba(255,200,60,.95),0 0 44px rgba(255,180,0,.5),inset 0 0 20px rgba(255,210,74,.5)}}
.logo-orb > img{width:58%!important;z-index:1}
.logo-orb .r2{inset:6%}
.logo-orb::after{inset:18%;z-index:0}
.orb-brand-logo::before{border-width:1.5px;inset:13%;box-shadow:0 0 8px rgba(255,200,60,.7)}
.orb-brand-logo > img{width:58%!important}

/* ===== Top 3 gọn lại ===== */
.podium{gap:10px;margin-bottom:12px}
.pod{padding:9px 12px;gap:10px}
.pod.p1{padding:11px 12px}
.pod .rk{font-size:14px;margin-bottom:1px;line-height:1.2}
.pod.p1 .rk{font-size:15px}
.pod .info b{font-size:15px}
.pod.p1 .info b{font-size:16px}
.pod .info small{font-size:10.5px}
.pod .av.md{width:42px;height:42px;font-size:17px}
.pod.p1 .av.md{width:46px;height:46px;font-size:19px}
.medal-b{width:18px;height:18px;font-size:10px;right:-3px;bottom:-3px}
.pod .pts b{font-size:24px}
.cup{width:44px;height:44px;margin-right:4px}
.cup-i{width:38px;height:40px}
.spk.k1{top:0;left:2px}

/* ===== Cách 4 dòng giữa Top 3 và khối Điểm các đội ===== */
.podium + .grid2{margin-top:calc(4 * 1.55em)}

/* ===== Top 3 hẹp lại, căn giữa ===== */
.top3-h,#podium{max-width:860px;margin-left:auto;margin-right:auto}
@media (min-width:861px){#podium{grid-template-columns:1fr 1.12fr 1fr}}

/* ===== Bảng điểm: xếp ngang (Điểm các đội trên, Giải đúng thành hàng ngang dưới) ===== */
.board-grid{grid-template-columns:1fr;gap:16px}
.feed-row{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(230px,1fr);gap:10px;max-height:none;overflow-x:auto;overflow-y:hidden;padding:0 0 6px}
.feed-row .fi{min-width:0;display:flex;flex-direction:column}
.feed-row .fi .q{flex:1}
.feed-row::-webkit-scrollbar{height:8px}
.feed-row::-webkit-scrollbar-thumb{background:rgba(143,230,255,.35);border-radius:4px}
@media (min-width:641px){.board-grid .bar-row{grid-template-columns:30px 30px minmax(120px,220px) 1fr 40px}}

/* ===== Giải đúng đầu tiên: 2 hàng x 4 thẻ ===== */
.feed-row{grid-auto-flow:row;grid-auto-columns:auto;grid-template-columns:repeat(4,minmax(0,1fr));overflow:visible;padding:0}
.feed-row .fi:nth-child(n+9){display:none}
@media (max-width:980px){.feed-row{grid-template-columns:repeat(2,minmax(0,1fr))}.feed-row .fi:nth-child(n+5){display:none}}
@media (max-width:560px){.feed-row{grid-template-columns:1fr}}

/* ===== TRANG CHỦ CỐ ĐỊNH — dữ liệu thêm vào không làm thay đổi bố cục ===== */
/* Top 3: chiều cao cố định, chữ dài tự cắt */
.pod{height:86px;min-width:0}
.pod.p1{height:96px}
.pod .info{min-width:0;overflow:hidden}
.pod .info b,.pod .info small{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.pod .pts{flex:none;min-width:44px}
/* Điểm các đội: khung cao đúng 8 dòng, nhiều hơn thì cuộn bên trong */
#bars{height:calc(8 * 30px + 7 * 10px);overflow-y:auto;overflow-x:hidden;align-content:start;scrollbar-width:thin;scrollbar-color:rgba(143,230,255,.35) transparent}
#bars .bar-row{height:30px}
#bars .nm{min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
/* Giải đúng đầu tiên: 8 ô kích thước cố định */
.feed-row .fi{height:124px;overflow:hidden}
.feed-row .fi .t{white-space:nowrap;overflow:hidden;min-width:0}
.feed-row .fi .t .tn{overflow:hidden;text-overflow:ellipsis;min-width:0}
.feed-row .fi .t time{flex:none}
.feed-row .fi .q{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;height:2.9em;line-height:1.45}
.feed-row .fi .a{min-width:0;gap:6px}
.feed-row .fi .a .av-t{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0}
.feed-row .fi .a .tag{flex:none}
.feed-row .fi.empty{opacity:.35;border-style:dashed;border-left-style:solid;animation:none}
.feed-row .fi.empty .av{background:rgba(255,255,255,.15);box-shadow:none}
/* chip thống kê không xuống dòng lung tung */
.hero .chips{flex-wrap:nowrap;overflow:hidden}
@media (max-width:860px){.hero .chips{flex-wrap:wrap}}

/* ===== Điểm các đội: cố định 10 dòng (Top 10) ===== */
#bars{height:calc(10 * 30px + 9 * 10px);overflow:hidden}

/* ===== Điểm các đội: Top 10 chia 2 cột (1–5 | 6–10) ===== */
#bars{display:grid;grid-auto-flow:column;grid-template-rows:repeat(5,30px);grid-template-columns:repeat(2,minmax(0,1fr));column-gap:44px;row-gap:10px;height:calc(5 * 30px + 4 * 10px)}
@media (min-width:641px){.board-grid #bars .bar-row{grid-template-columns:30px 30px minmax(90px,180px) 1fr 34px}}
@media (max-width:760px){#bars{grid-auto-flow:row;grid-template-rows:none;grid-template-columns:1fr;height:calc(10 * 30px + 9 * 10px)}}

/* ===== Căn giữa tiêu đề Bảng điểm ===== */
.hero > .sp{text-align:center}
.hero .chips{justify-content:center}
.hero h1{text-transform:uppercase;letter-spacing:1.5px}
.hero .org,.hero .dept{text-align:left}

/* ===== Khung đầu Bảng điểm: bố cục 3 phần cân đối ===== */
.hero3{display:grid;grid-template-columns:1fr auto 1fr;grid-template-areas:"left title right" "left chips right";align-items:center;column-gap:18px;row-gap:10px}
.h-left{grid-area:left;display:flex;align-items:center;gap:12px;justify-self:start;min-width:0}
.h-org{min-width:0}
.h-org .org{color:var(--gold);font-weight:800;letter-spacing:1px;font-size:12px}
.h-org .dept{color:#fff;font-weight:800;letter-spacing:1px;font-size:12px;margin-top:4px;text-shadow:0 0 12px rgba(143,230,255,.8);max-width:230px}
.h-title{grid-area:title;align-self:end;margin:0;text-align:center;font-size:28px;text-transform:uppercase;letter-spacing:2px;white-space:nowrap}
.h-chips{grid-area:chips;align-self:start;justify-content:center;flex-wrap:wrap}
.h-right{grid-area:right;justify-self:end}
.hero3 .orb-hero-logo{width:112px;height:112px}
@media (max-width:980px){
  .hero3{grid-template-columns:1fr;grid-template-areas:"left" "title" "chips" "right";justify-items:center;text-align:center}
  .h-left,.h-right{justify-self:center}
  .h-title{white-space:normal;font-size:22px}
}
@media (min-width:981px){
  .hero3{grid-template-areas:"left title right" "chips chips chips"}
  .h-title{align-self:center}
  .h-org .org{white-space:nowrap}
  .h-org .dept{max-width:210px}
}
@media (min-width:981px){
  .hero3 .orb-hero-logo{width:100px;height:100px}
  .h-org .org,.h-org .dept{white-space:nowrap;max-width:none;letter-spacing:.8px}
}
@media (min-width:981px){
  .hero3{column-gap:28px}
  .h-title{font-size:25px;letter-spacing:1.5px}
  .hero3 .orb-hero-logo{width:96px;height:96px}
  .h-left{gap:10px}
}
@media (min-width:981px){
  .hero3{grid-template-columns:auto 1fr auto;column-gap:24px}
  .h-title{justify-self:center;font-size:26px;letter-spacing:2px}
}

/* ===== Chữ 3D phối màu — khung đầu Bảng điểm ===== */
.h-title{text-shadow:none}
.h-title .cup-e{display:inline-block;filter:drop-shadow(0 3px 0 #6b4200) drop-shadow(0 0 8px rgba(255,210,74,.7))}
.t3d{position:relative;display:inline-block;font-weight:800;
  background:linear-gradient(180deg,#ffffff 0%,#e4fbff 30%,#8fe6ff 55%,#3fa9ff 78%,#1a6fe0 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  filter:drop-shadow(0 0 10px rgba(76,195,255,.55))}
/* lớp đổ khối 3D nằm phía sau chữ */
.t3d::before{content:attr(data-t);position:absolute;left:0;top:0;z-index:-1;color:#0a2a6b;
  -webkit-text-fill-color:#0a2a6b;
  text-shadow:1px 1px 0 #0c3480,2px 2px 0 #0b2f76,3px 3px 0 #0a2a6b,4px 4px 0 #082461,5px 5px 0 #061d52,6px 6px 8px rgba(0,0,0,.55)}
.t3d-gold{display:inline-block;background:linear-gradient(180deg,#fff6c4 0%,#ffd24a 45%,#e0a000 70%,#fff0a0 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  filter:drop-shadow(1px 1px 0 #8a5200) drop-shadow(2px 2px 0 #6b3f00) drop-shadow(0 0 6px rgba(255,200,60,.45))}
.h-org .dept.t3d-silver{color:#f4f9ff;
  text-shadow:1px 1px 0 #7fb2e6,2px 2px 0 #2c5ea8,3px 3px 0 #0f3478,0 0 12px rgba(143,230,255,.55)}
.t3d::before{content:none}
.t3d{filter:drop-shadow(1px 1px 0 #1d5fc0) drop-shadow(1px 1px 0 #164fa6) drop-shadow(1px 1px 0 #10408c) drop-shadow(1px 1px 0 #0b3274) drop-shadow(1px 1px 0 #08265c) drop-shadow(2px 3px 3px rgba(0,0,0,.6)) drop-shadow(0 0 12px rgba(76,195,255,.45))}

/* ===== Bảng có khung cuộn cố định + tiêu đề ghim ===== */
.scroll-box{max-height:540px;overflow:auto;border:1px solid var(--line);border-radius:8px;scrollbar-width:thin;scrollbar-color:rgba(143,230,255,.4) transparent}
.scroll-box thead th{position:sticky;top:0;z-index:2;background:#07245e;box-shadow:0 1px 0 var(--line2)}
.scroll-box::-webkit-scrollbar{width:10px;height:10px}
.scroll-box::-webkit-scrollbar-thumb{background:rgba(143,230,255,.35);border-radius:5px}
.tb td{vertical-align:middle}

/* ===== Đầu trang Quản trị ===== */
.adm-head{display:flex;align-items:center;gap:18px;padding:18px 22px;position:relative;overflow:hidden}
.adm-head::after{content:'';position:absolute;right:-60px;top:-60px;width:220px;height:220px;border-radius:50%;
  background:radial-gradient(circle,rgba(76,195,255,.25),transparent 70%);pointer-events:none}
.adm-shield{width:62px;height:62px;flex:none;display:grid;place-items:center;font-size:32px;border-radius:16px;
  background:linear-gradient(145deg,#1a5fd0,#0a2a6b);border:1px solid rgba(143,230,255,.6);
  box-shadow:0 0 0 3px rgba(76,195,255,.15),0 0 22px rgba(76,195,255,.55),inset 0 0 12px rgba(143,230,255,.35);animation:admglow 2.8s ease-in-out infinite}
@keyframes admglow{50%{box-shadow:0 0 0 5px rgba(76,195,255,.1),0 0 34px rgba(76,195,255,.8),inset 0 0 16px rgba(143,230,255,.5)}}
.adm-titles{flex:1;min-width:0}
.adm-title{font-size:26px;text-transform:uppercase;letter-spacing:2px;text-shadow:none;margin:0}
.adm-sub{color:#cfe6ff;font-size:13px;margin-top:4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.adm-stats{display:flex;gap:10px;position:relative;z-index:1}
.adm-stats div{min-width:74px;text-align:center;padding:8px 10px;border-radius:10px;background:rgba(1,12,40,.7);border:1px solid var(--line2)}
.adm-stats b{display:block;font-size:22px;color:#fff;text-shadow:0 0 10px rgba(143,230,255,.7);line-height:1.1}
.adm-stats small{font-size:11px;color:#b9d4f5}
.adm-tabs{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:10px;margin:0 0 20px}
.adm-tab{--ac:#4cc3ff;display:flex;align-items:center;gap:10px;padding:12px;border-radius:12px;color:#fff;
  background:linear-gradient(160deg,rgba(255,255,255,.05),rgba(2,18,58,.85));border:1px solid rgba(143,190,255,.25);
  border-top:3px solid var(--ac);transition:transform .18s,box-shadow .18s,border-color .18s;min-width:0}
.adm-tab:hover{text-decoration:none;transform:translateY(-3px);box-shadow:0 8px 22px rgba(0,0,0,.35),0 0 16px color-mix(in srgb,var(--ac) 45%,transparent)}
.adm-tab .ic{width:40px;height:40px;flex:none;display:grid;place-items:center;font-size:20px;border-radius:50%;
  background:radial-gradient(circle at 35% 30%,color-mix(in srgb,var(--ac) 55%,#fff),var(--ac) 55%,color-mix(in srgb,var(--ac) 50%,#000));
  box-shadow:0 0 12px color-mix(in srgb,var(--ac) 60%,transparent),inset 0 -3px 6px rgba(0,0,0,.25)}
.adm-tab .tx{min-width:0;display:flex;flex-direction:column}
.adm-tab b{font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.adm-tab small{font-size:11px;color:#b9d4f5;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.adm-tab.on{border-color:var(--ac);background:linear-gradient(160deg,color-mix(in srgb,var(--ac) 28%,transparent),rgba(2,18,58,.9));
  box-shadow:0 0 0 1px var(--ac),0 0 24px color-mix(in srgb,var(--ac) 55%,transparent)}
.adm-tab.on small{color:#fff}
@media (max-width:1100px){.adm-tabs{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media (max-width:760px){.adm-head{flex-wrap:wrap}.adm-stats{width:100%;justify-content:space-between}.adm-stats div{flex:1;min-width:0}.adm-tabs{grid-template-columns:repeat(2,minmax(0,1fr))}.adm-title{font-size:20px}}
@media (min-width:1101px){
  .adm-tab{flex-direction:column;text-align:center;gap:8px;padding:14px 8px 12px}
  .adm-tab .ic{width:46px;height:46px;font-size:22px}
  .adm-tab .tx{align-items:center;width:100%}
  .adm-tab b{font-size:14px}
}

/* ===== Gợi ý câu hỏi ===== */
.hint-box{margin-top:14px;padding:12px;border:1px dashed rgba(255,210,74,.45);border-radius:10px;background:rgba(255,210,74,.05)}
.hint-row{display:flex;gap:8px;align-items:center;margin-top:8px}
.hint-row .hn{flex:none;width:64px;font-weight:700;color:var(--gold);font-size:12px}
.hint-row input[type=text]{flex:1;min-width:0}
.hint-row .hp{flex:none;display:flex;align-items:center;gap:4px;color:#ffb3c0;font-weight:700}
.hint-row .hp input{width:74px;text-align:center}
.hint-l{font-size:13px;margin-top:5px;color:#ffe9a8}
@media (max-width:640px){.hint-row{flex-wrap:wrap}.hint-row .hn{width:100%}}
.hints{display:flex;flex-direction:column;gap:6px;margin-top:10px}
.hint-btn{align-self:flex-start;display:inline-flex;align-items:center;gap:8px;padding:6px 12px;border-radius:8px;cursor:pointer;
  background:rgba(255,210,74,.1);border:1px dashed rgba(255,210,74,.6);color:#ffe9a8;font:700 12px 'JetBrains Mono',monospace;transition:.15s}
.hint-btn:hover:not(:disabled){background:rgba(255,210,74,.2);box-shadow:0 0 12px rgba(255,210,74,.35)}
.hint-btn:disabled{opacity:.4;cursor:not-allowed}
.hint.open{padding:8px 12px;border-radius:8px;background:rgba(255,210,74,.08);border-left:3px solid var(--gold);font-size:13px;color:#fff}
.hint.open .hl{color:var(--gold);font-weight:700;margin-right:6px}
.pen-note{display:block;font-size:11px;color:#ffb3c0;font-weight:400}

/* ===== Khối "Cho tất cả đội thi lại" ===== */
.retake{display:flex;align-items:center;gap:16px;border-color:rgba(255,77,109,.55);
  background:linear-gradient(120deg,rgba(255,77,109,.14),var(--panel) 55%);box-shadow:0 0 22px rgba(255,77,109,.18)}
.retake-ic{width:52px;height:52px;flex:none;display:grid;place-items:center;font-size:26px;border-radius:14px;
  background:radial-gradient(circle at 35% 30%,#ff9aae,#e0314f 60%,#8a1428);box-shadow:0 0 16px rgba(255,77,109,.6)}
.retake h3{color:#fff;margin-bottom:2px}
.retake p{margin:0;font-size:12px}
.retake .btn.bad{background:linear-gradient(180deg,#ff6b85,#d62848);color:#fff;border-color:#ff9aae}
@media (max-width:760px){.retake{flex-wrap:wrap}.retake form{width:100%}.retake select{flex:1}}

/* ===== Xác thực mật khẩu ===== */
.sudo-card{text-align:center}
.sudo-card form{text-align:left}
.sudo-ic,.pm-ic{width:64px;height:64px;margin:0 auto 10px;display:grid;place-items:center;font-size:30px;border-radius:18px;
  background:radial-gradient(circle at 35% 30%,#ffe9a0,#ffb300 60%,#8a5a00);box-shadow:0 0 22px rgba(255,190,40,.6)}
.pass-modal{max-width:420px;text-align:center}
.pass-modal label,.pass-modal .inp-ic{text-align:left}
.pm-msg{white-space:pre-line;color:#ffd0d8;margin:6px 0 4px}
.adm-sudo{display:flex;align-items:center;gap:8px;margin-top:8px;flex-wrap:wrap}

/* ===== Khung xác nhận (chốt đáp án, mở gợi ý) ===== */
.confirm-modal{max-width:440px;text-align:center;animation:cmIn .18s ease-out}
@keyframes cmIn{from{transform:scale(.92);opacity:0}}
.cm-ic{width:64px;height:64px;margin:0 auto 8px;display:grid;place-items:center;font-size:32px;border-radius:50%;
  background:radial-gradient(circle at 35% 30%,#bff3ff,#3fb4ff 60%,#0b4fa8);box-shadow:0 0 22px rgba(76,195,255,.6)}
.confirm-modal.danger .cm-ic{background:radial-gradient(circle at 35% 30%,#fff2b0,#ffb300 60%,#8a5a00);box-shadow:0 0 22px rgba(255,190,40,.6)}
.cm-title{font-size:18px;margin-bottom:10px}
.cm-lines{display:grid;gap:6px;text-align:left;margin:4px 0 10px}
.cm-row{display:flex;gap:10px;align-items:baseline;padding:8px 12px;border-radius:8px;background:rgba(1,12,40,.7);border:1px solid var(--line)}
.cm-k{flex:none;width:110px;color:var(--mut);font-size:12px}
.cm-v{color:#fff;font-size:15px;word-break:break-word}
.cm-note{color:#ffe9a8;font-size:13px;margin:4px 0 12px}
.cm-btns{display:flex;gap:10px;justify-content:center}
.cm-btns .btn{min-width:130px;padding:11px 16px}
.confirm-modal.danger .cm-ok{background:linear-gradient(180deg,#ffd76a,#e0a000);color:#2a1600;border-color:#fff0a0}
.pen-note[hidden]{display:none!important}

/* ===== Chân trang: chữ nổi 3D ===== */
.foot{padding:26px 10px 34px}
.foot3d{display:inline-flex;align-items:center;gap:10px;font-weight:800;letter-spacing:1.5px;position:relative}
.foot3d::before,.foot3d::after{content:'';width:70px;height:2px;border-radius:2px;background:linear-gradient(90deg,transparent,#8fe6ff);box-shadow:0 0 8px #4cc3ff}
.foot3d::after{background:linear-gradient(90deg,#8fe6ff,transparent)}
.f-lb{font-size:14px;color:#e6f4ff;text-transform:uppercase;
  text-shadow:1px 1px 0 #7fb2e6,2px 2px 0 #2c5ea8,3px 3px 0 #0f3478,0 0 10px rgba(143,230,255,.5)}
.f-nm{position:relative;display:inline-block;font-size:19px;
  background:linear-gradient(180deg,#fffbe0 0%,#ffe27a 35%,#ffc21a 60%,#e09400 80%,#fff0a0 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  filter:drop-shadow(1px 1px 0 #b87400) drop-shadow(1px 1px 0 #946000) drop-shadow(1px 1px 0 #6b4200) drop-shadow(1px 1px 0 #4a2d00) drop-shadow(2px 3px 3px rgba(0,0,0,.6)) drop-shadow(0 0 10px rgba(255,200,60,.45))}
/* ánh sáng lướt qua tên */
.f-nm::after{content:attr(data-t);position:absolute;left:0;top:0;
  background:linear-gradient(105deg,transparent 40%,rgba(255,255,255,.95) 50%,transparent 60%) 0 0/250% 100% no-repeat;
  -webkit-background-clip:text;background-clip:text;color:transparent;animation:ftShine 4s ease-in-out infinite}
@keyframes ftShine{0%,55%{background-position:120% 0}100%{background-position:-60% 0}}
@media (max-width:640px){.foot3d::before,.foot3d::after{width:28px}.f-lb{font-size:12px}.f-nm{font-size:16px}}
.f-nm::after{content:none}
.f-nm{background:
    linear-gradient(105deg,transparent 42%,rgba(255,255,255,.95) 50%,transparent 58%) 120% 0/250% 100% no-repeat,
    linear-gradient(180deg,#fffbe0 0%,#ffe27a 35%,#ffc21a 60%,#e09400 80%,#fff0a0 100%) 0 0/100% 100%;
  -webkit-background-clip:text;background-clip:text;color:transparent;animation:ftShine2 4s ease-in-out infinite}
@keyframes ftShine2{0%,55%{background-position:120% 0,0 0}100%{background-position:-60% 0,0 0}}

/* ===== Trang đăng nhập (bố cục mới) ===== */
.login2{display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center;min-height:calc(100vh - 230px);padding:10px 0}
.lg-brand{display:flex;align-items:center;gap:14px}
.lg-brand .org{font-size:15px;letter-spacing:2px;font-weight:800}
.lg-brand .dept{font-size:13px;letter-spacing:1.5px;font-weight:800;margin-top:6px}
.login2 .orb-hero-logo{width:120px;height:120px}
.lg-title{font-size:clamp(34px,4.6vw,56px);line-height:1.15;margin:18px 0 20px;text-transform:uppercase;letter-spacing:2px;text-shadow:none}
.lg-row{display:flex;gap:16px;align-items:stretch;flex-wrap:wrap}
.lg-row .cd{display:flex;flex-direction:column;justify-content:center;min-width:170px}
.lg-steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:8px;flex:1;min-width:260px}
.lg-steps li{display:flex;gap:10px;align-items:center;padding:9px 12px;border-radius:10px;background:var(--panel2);border:1px solid var(--line);font-size:12.5px}
.lg-steps li > b{flex:none;width:24px;height:24px;border-radius:50%;display:grid;place-items:center;font-size:12px;background:#fff;color:#062a6e}
.lg-card{position:relative;padding:26px 26px 22px;border-radius:18px;background:linear-gradient(160deg,rgba(20,70,160,.55),rgba(3,20,60,.92) 60%);
  border:1px solid rgba(143,230,255,.55);box-shadow:0 0 0 1px rgba(143,230,255,.15),0 20px 50px rgba(0,0,0,.45),0 0 40px rgba(76,195,255,.28);backdrop-filter:blur(6px)}
.lg-card::before{content:'';position:absolute;left:24px;right:24px;top:-1px;height:2px;border-radius:2px;background:linear-gradient(90deg,transparent,#8fe6ff,#ffd24a,#8fe6ff,transparent);box-shadow:0 0 12px #4cc3ff}
.lg-card-head{display:flex;gap:14px;align-items:center;margin-bottom:16px}
.lg-lock{width:54px;height:54px;flex:none;display:grid;place-items:center;font-size:26px;border-radius:14px;
  background:linear-gradient(145deg,#1a5fd0,#0a2a6b);border:1px solid rgba(143,230,255,.6);box-shadow:0 0 18px rgba(76,195,255,.5)}
.lg-card-head h2{font-size:21px;margin:0}
.lg-card-head p{margin:4px 0 0;font-size:12.5px}
.lg-card .tabs{margin-bottom:6px}
.lg-card label{margin-top:14px}
.lg-card .inp-ic input{height:48px;font-size:15px;border-radius:10px;padding-left:40px}
.lg-card .inp-ic > span:first-child{left:14px;font-size:16px}
.lg-card .inp-ic .eye{right:14px;opacity:.75;font-size:16px}
.lg-btn{margin-top:20px;height:50px;font-size:15px;letter-spacing:3px;border-radius:10px}
.lg-board{display:block;text-align:center;margin-top:16px;font-weight:700}
/* ô nhập khi trình duyệt tự điền: giữ nền tối, chữ trắng */
input:-webkit-autofill,input:-webkit-autofill:hover,input:-webkit-autofill:focus{
  -webkit-text-fill-color:#fff;caret-color:#fff;-webkit-box-shadow:0 0 0 1000px #031a4c inset;box-shadow:0 0 0 1000px #031a4c inset;transition:background-color 9999s}
@media (max-width:900px){.login2{grid-template-columns:1fr;gap:22px;min-height:0}.lg-title{margin:12px 0 14px}.lg-steps{grid-template-columns:1fr}}
@media (max-width:900px){
  .login2{display:flex;flex-direction:column;align-items:stretch}
  .lg-left{display:contents}
  .lg-brand{order:1}.lg-title{order:2;font-size:30px}.lg-card{order:3}.lg-row{order:4}
  .lg-card-head h2{font-size:18px}
}

/* ===== Căn giữa 2 dòng đơn vị với nhau (đăng nhập + bảng điểm) ===== */
.lg-brand > div:last-child,.h-org{display:flex;flex-direction:column;align-items:center;text-align:center}
.hero .h-org .org,.hero .h-org .dept{text-align:center}
.lg-or{display:flex;align-items:center;gap:10px;margin:16px 0 12px;color:var(--mut);font-size:12px}
.lg-or::before,.lg-or::after{content:'';flex:1;height:1px;background:var(--line2)}
.lg-view{height:48px;font-size:14px;letter-spacing:1.5px;border-radius:10px;flex-direction:column;gap:0;line-height:1.2;
  background:linear-gradient(180deg,rgba(255,210,74,.25),rgba(255,160,0,.12));border-color:#ffd24a;color:#ffe9a8}
.lg-view small{font-size:10px;letter-spacing:.5px;text-transform:none;color:#ffe9a8;opacity:.85}
.lg-view:hover{box-shadow:0 0 18px rgba(255,210,74,.45)}
.wait-start{display:flex;flex-direction:column;align-items:center;gap:6px;margin:14px auto 0;padding:16px 22px;max-width:420px;border-radius:12px;
  border:1px dashed rgba(255,210,74,.6);background:rgba(255,210,74,.08)}
.wait-start .ws-ic{font-size:34px;animation:htroph 1.6s ease-in-out infinite}
.wait-start b{color:#ffe9a8;font-size:16px}
.wait-start small{color:#cfe6ff;text-align:center}
.wait-btn{border-color:rgba(255,210,74,.6);color:#ffe9a8;background:rgba(255,210,74,.08)}

/* ===== Nút nhạc thi đấu ===== */
#musicToggle{position:fixed;left:10px;bottom:46px;z-index:60;background:rgba(2,8,20,.85);border:1px solid #ffd24a;color:#ffe9a8;border-radius:8px;
  padding:5px 10px;font:12px 'JetBrains Mono',monospace;cursor:pointer;box-shadow:0 0 10px rgba(255,210,74,.3)}
#musicToggle.off{border-color:#1f4d80;color:#9fb8d8;box-shadow:none}
body.tv #musicToggle{bottom:calc(6.4vh + 36px);left:1vw}
@media (max-width:900px),(max-height:520px){body.tv #musicToggle{bottom:92px}}

/* ===== Trang đội: khung xếp hạng cố định chiều cao ===== */
.rank-list{height:calc(8 * 42px + 7 * 6px);overflow-y:auto;align-content:start;padding-right:4px;scrollbar-width:thin;scrollbar-color:rgba(143,230,255,.4) transparent}
.rank-list .it{height:42px;flex:none}
.rank-list .it{white-space:nowrap;overflow:hidden}
.grid2 > section.card,.grid2 > aside{align-self:start}
.f-credit{display:block;margin-top:8px;font-size:10.5px;color:#8fb3dc;letter-spacing:.3px}

/* ===== Quản trị › Nhạc nền ===== */
.music-tb audio{height:32px;width:220px;vertical-align:middle}
.music-tb tr.mu-off td{opacity:.5}
.music-tb input[type=checkbox]{width:18px;height:18px;accent-color:#2ee59d}

/* ===== Trang đội: 2 cột cân đối ===== */
.team-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);grid-template-areas:"exams rank" "feed rank";gap:16px;align-items:stretch}
.team-grid > .card{margin:0}
.tg-exams{grid-area:exams}
.tg-feed{grid-area:feed;display:flex;flex-direction:column;min-height:0}
.tg-feed-list{flex:1;max-height:none;min-height:120px;overflow-y:auto}
.tg-rank{grid-area:rank;display:flex;flex-direction:column;min-height:0}
.tg-rank .rank-list{flex:1;height:auto;min-height:calc(6 * 42px + 5 * 6px);max-height:calc(12 * 42px + 11 * 6px)}
@media (max-width:860px){.team-grid{grid-template-columns:1fr;grid-template-areas:"exams" "rank" "feed"}.tg-rank .rank-list{height:calc(8 * 42px + 7 * 6px);flex:none}}
.team-grid{grid-template-rows:auto 1fr}
.tg-exams{align-self:start}
.tg-feed-list{display:flex;flex-direction:column;gap:8px;align-content:start}
.tg-feed-list .fi{flex:none;margin:0}

/* ===== Lượt chốt từng câu ===== */
.tag.gold{color:#ffd24a;border-color:rgba(255,210,74,.55);background:rgba(255,210,74,.1)}
.tries-tag{color:#9fd0ff;border-color:rgba(120,180,255,.5);background:rgba(47,123,255,.12)}
.tries-tag.red{color:#ff8a8a;border-color:rgba(255,90,90,.6);background:rgba(255,60,60,.12)}
.qcard.out:not(.ok){opacity:.82;border-color:rgba(255,90,90,.45)}
.out-note{margin-top:8px;padding:8px 12px;border-radius:10px;font-size:12.5px;color:#ffc2c2;background:rgba(255,60,60,.1);border:1px dashed rgba(255,90,90,.5)}
.out-note[hidden]{display:none!important}

.tries-form{display:grid;grid-template-columns:1.2fr 2fr 1.3fr .7fr 1fr;gap:12px;align-items:end}
.tries-form label{margin-top:0}
@media (max-width:900px){.tries-form{grid-template-columns:1fr}}

/* đường dẫn quản trị bí mật */
.secret-url{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin:10px 0;padding:10px 12px;border-radius:10px;background:rgba(255,210,74,.08);border:1px dashed rgba(255,210,74,.6)}
.secret-url code{flex:1;min-width:0;word-break:break-all;color:#ffe08a;font-size:13px}

/* ===== Trang thống kê ===== */
.st-head{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.st-title{margin:0;font-size:clamp(20px,2.4vw,30px)}
.seg{display:inline-flex;border:1px solid var(--line2,#1f4a8f);border-radius:12px;overflow:hidden;background:rgba(3,20,50,.6)}
.seg button{background:none;border:0;color:#9fb6d9;padding:9px 16px;font:inherit;font-weight:700;cursor:pointer}
.seg button.on{background:linear-gradient(180deg,#2f7bff,#1747a8);color:#fff;box-shadow:inset 0 1px 0 rgba(255,255,255,.3)}
.st-tiles{display:grid;grid-template-columns:repeat(8,minmax(0,1fr));gap:10px;margin:14px 0}
.st-tiles .tile{margin:0;padding:12px}
.st-tiles .tile b{font-size:22px}
@media (max-width:1200px){.st-tiles{grid-template-columns:repeat(4,minmax(0,1fr))}}
@media (max-width:600px){.st-tiles{grid-template-columns:repeat(2,minmax(0,1fr))}}
.st-grid{display:grid;grid-template-columns:minmax(0,1.7fr) minmax(0,1fr);gap:16px;align-items:start}
.st-grid > .card,.st-side > .card{margin:0}
.st-side{display:grid;gap:16px}
@media (max-width:900px){.st-grid{grid-template-columns:1fr}}
.st-grid + .card{margin-top:16px}
.st-bars.all{max-height:640px;overflow-y:auto;padding-right:4px}
.st-hi{display:grid;gap:10px}
.st-hi .hi{display:flex;gap:10px;align-items:center;padding:8px 10px;border-radius:10px;background:rgba(47,123,255,.08);border:1px solid rgba(76,195,255,.18)}
.st-hi .hi > span{font-size:22px}
.st-hi small{color:#8fa6c8;font-size:11.5px}
#stSearch{max-width:220px;margin:0}
.st-tbl-wrap{max-height:560px}
.st-tb th[data-k]{cursor:pointer;user-select:none;white-space:nowrap}
.st-tb th[data-k]::after{content:attr(data-dir);margin-left:4px;color:#4cc3ff;font-size:10px}
.st-tb td.rk{font-weight:800;text-align:center}
.st-tb td.ok{color:#2ee59d;font-weight:700}.st-tb td.bad{color:#ff8a8a;font-weight:700}
.st-tb b.sc{font-size:16px;color:#ffe08a}
.st-tb tr.me td{background:rgba(255,210,74,.08)}
.accb{position:relative;min-width:90px;height:18px;border-radius:9px;background:rgba(255,255,255,.06);overflow:hidden}
.accb i{position:absolute;inset:0 auto 0 0;background:linear-gradient(90deg,#1f8f6a,#2ee59d)}
.accb span{position:relative;display:block;text-align:center;font-size:11px;line-height:18px;font-weight:700;text-shadow:0 1px 2px #000}
/* SVG chart */
.dtc{display:block;overflow:visible}
.dtc text{font-family:inherit;fill:#b9cbe6;font-size:12px}
.dtc .lb{fill:#e8f0ff;font-weight:600}
.dtc .rk{font-size:13px;font-weight:800;fill:#9fb6d9}
.dtc .val{fill:#ffe08a;font-weight:800;font-size:13px}
.dtc .track{fill:rgba(255,255,255,.04)}
.dtc .me-bg{fill:rgba(255,210,74,.10);stroke:rgba(255,210,74,.45)}
.dtc .bar{transform-box:fill-box;transform-origin:left;animation:dtcGrow .8s cubic-bezier(.2,.8,.2,1) both}
.dtc .zero{stroke:#ff8a8a;stroke-dasharray:3 3}
.dtc .grid{stroke:rgba(120,170,255,.12)}
.dtc .ax{fill:#7f95b8;font-size:11px}
.dtc .ln{fill:none;stroke-width:2.6;stroke-linejoin:round;stroke-dasharray:4000;stroke-dashoffset:4000;animation:dtcDraw 1.6s ease-out forwards;filter:drop-shadow(0 0 4px rgba(0,0,0,.6))}
.dtc .dot{stroke:#061430;stroke-width:2}
.dtc .col{transform-box:fill-box;transform-origin:bottom;animation:dtcUp .7s cubic-bezier(.2,.8,.2,1) both}
.dtc .cv{fill:#e8f0ff;font-size:11px;font-weight:700}
.dtc .grp{fill:#4cc3ff;font-size:11px;font-weight:700}
.dtc .dn-bg{fill:none;stroke:rgba(255,255,255,.06)}
.dtc .dn{transition:stroke-dasharray .6s}
.dtc .dn-big{fill:#fff;font-size:28px;font-weight:800}
.dtc .dn-sm{fill:#8fa6c8;font-size:11px}
@keyframes dtcGrow{from{transform:scaleX(0)}}
@keyframes dtcUp{from{transform:scaleY(0)}}
@keyframes dtcDraw{to{stroke-dashoffset:0}}
.dtc-donut{display:flex;align-items:center;gap:16px;flex-wrap:wrap;justify-content:center}
.dtc-legend{display:flex;flex-wrap:wrap;gap:6px 14px;margin-top:8px;font-size:12px;color:#c9d8ef}
.dtc-legend.col{flex-direction:column;margin:0}
.dtc-legend i{display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:6px;vertical-align:-1px}
.dtc-legend b{color:#ffe08a;margin-left:4px}
.dtc-empty{padding:30px 10px;text-align:center}
.dtc .zero0{stroke:rgba(255,255,255,.28)}
.st-tiles .tile{flex-direction:column;align-items:center;text-align:center;gap:4px}
.st-tiles .tile .ic{font-size:20px}
.st-tiles .tile small{white-space:nowrap}
/* tự cập nhật / đổi cỡ màn hình: không chạy lại hiệu ứng mọc cột */
.st-still .dtc .bar,.st-still .dtc .col,.st-still .dtc .ln{animation:none;stroke-dashoffset:0}
@media (max-width:600px){.st-tiles .tile{flex-direction:row;text-align:left;padding:10px;gap:10px}.st-tiles .tile b{font-size:19px}}

/* ===== Sao lưu & phục hồi ===== */
.bk-grid{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:16px;align-items:stretch;margin-bottom:16px}
.bk-grid > .card{margin:0}
@media (max-width:900px){.bk-grid{grid-template-columns:1fr}}
.bk-tb tr.bad td{opacity:.6}

/* ===== Xác thực 2 lớp ===== */
.totp-card{max-width:900px}
.totp-setup{display:flex;gap:22px;align-items:flex-start;flex-wrap:wrap}
.qr-box{background:#fff;padding:8px;border-radius:12px;box-shadow:0 0 24px rgba(76,195,255,.35);line-height:0}
.totp-steps{margin:0 0 12px;padding-left:20px;display:grid;gap:8px}
.totp-key{display:inline-block;margin-top:4px;padding:6px 10px;border-radius:8px;background:rgba(255,210,74,.1);border:1px dashed rgba(255,210,74,.6);color:#ffe08a;font-size:14px;letter-spacing:1px;word-break:break-all}
.bk-codes{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:6px;margin:10px 0}
.bk-codes code{text-align:center;padding:6px;border-radius:6px;background:rgba(0,0,0,.35);font-size:14px;letter-spacing:1px;color:#fff}
@media (max-width:600px){.bk-codes{grid-template-columns:repeat(2,minmax(0,1fr))}}
.force2fa{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-top:14px;padding:10px 12px;border-radius:10px;background:rgba(47,123,255,.08);border:1px solid rgba(76,195,255,.25)}
.twofa{text-align:center}
.twofa-ic{font-size:44px;line-height:1;margin:4px 0 6px}
.twofa-code{font-size:28px!important;letter-spacing:10px;text-align:center;margin:6px 0 12px;font-weight:800}
.totp-nag{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.totp-nag .btn{margin-left:auto}

/* ===== Tab An ninh ===== */
.sec-score{display:flex;gap:26px;align-items:flex-start;flex-wrap:wrap}
.sc-ring{--p:0;--c:#2ee59d;width:150px;height:150px;border-radius:50%;flex:none;display:grid;place-content:center;text-align:center;
  background:radial-gradient(closest-side,#061430 78%,transparent 80% 100%),conic-gradient(var(--c) calc(var(--p) * 1%),rgba(255,255,255,.08) 0)}
.sc-ring b{font-size:44px;line-height:1;color:var(--c)}
.sc-ring small{color:#8fa6c8;font-size:12px}
.sec-list{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 18px}
.sec-list li{display:flex;gap:8px;align-items:flex-start;padding:6px 8px;border-radius:8px;background:rgba(255,255,255,.03)}
.sec-list li.no{background:rgba(255,176,32,.08)}
.sec-list small{display:block;color:#ffcf80;font-size:11.5px}
@media (max-width:900px){.sec-list{grid-template-columns:1fr}}
.integ-list{display:flex;flex-wrap:wrap;gap:4px 8px;margin-top:4px}
.integ-list code{font-size:11.5px}

/* ===== Bảng điều khiển giờ thi — nút 3D ===== */
.ctrl3d{display:flex;align-items:center;gap:14px;flex-wrap:wrap;padding:14px 18px;
  background:linear-gradient(180deg,rgba(18,52,120,.55),rgba(4,16,44,.85));border:1px solid rgba(76,195,255,.35);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.12),0 10px 28px rgba(0,0,0,.45),0 0 22px rgba(47,123,255,.18)}
.c3-lab{display:flex;align-items:center;gap:10px;margin-right:4px}
.c3-ic{font-size:26px;filter:drop-shadow(0 0 6px rgba(76,195,255,.6))}
.c3-lab b{display:block;font-size:13px;letter-spacing:2px;color:#fff;text-shadow:0 1px 0 #1b4d9a,0 2px 0 #0f2f63,0 0 10px rgba(76,195,255,.6)}
.c3-lab small{color:#8fb3e0;font-size:11px}
.c3-grp{display:flex;align-items:center;gap:6px;padding:6px;border-radius:14px;background:rgba(0,8,26,.55);
  box-shadow:inset 0 2px 6px rgba(0,0,0,.6),inset 0 -1px 0 rgba(255,255,255,.06)}
.c3-cap{font-size:10px;letter-spacing:1.5px;text-transform:uppercase;color:#7fa0cc;padding:0 6px 0 4px}
/* nút nổi khối */
.k3{--t:#2f7bff;--b:#1747a8;--d:#0c2a66;--g:rgba(47,123,255,.55);
  position:relative;display:inline-flex;align-items:center;justify-content:center;gap:6px;min-width:58px;
  padding:9px 16px 10px;border:0;border-radius:11px;cursor:pointer;font:inherit;font-size:13px;font-weight:800;letter-spacing:.6px;
  color:#fff;text-decoration:none;text-shadow:0 1px 0 rgba(0,0,0,.45);
  background:linear-gradient(180deg,color-mix(in srgb,var(--t) 70%,#fff) 0%,var(--t) 45%,var(--b) 100%);
  box-shadow:0 5px 0 var(--d),0 9px 14px rgba(0,0,0,.45),inset 0 1px 0 rgba(255,255,255,.5),0 0 14px var(--g);
  transform:translateY(-2px);transition:transform .08s,box-shadow .08s,filter .15s}
.k3:hover{filter:brightness(1.12);box-shadow:0 5px 0 var(--d),0 10px 18px rgba(0,0,0,.5),inset 0 1px 0 rgba(255,255,255,.55),0 0 22px var(--g)}
.k3:active{transform:translateY(3px);box-shadow:0 0 0 var(--d),0 3px 6px rgba(0,0,0,.5),inset 0 2px 4px rgba(0,0,0,.35)}
.k3:disabled{filter:grayscale(.6) brightness(.7);cursor:not-allowed}
.k3-main{--t:#ffb020;--b:#c46f00;--d:#7a4200;--g:rgba(255,176,32,.5);font-size:14px;padding:10px 20px 11px;color:#1d1200;text-shadow:0 1px 0 rgba(255,255,255,.4)}
.k3-plus{--t:#1fc98a;--b:#0d8a5c;--d:#07573a;--g:rgba(46,229,157,.45)}
.k3-minus{--t:#3d86ff;--b:#1d4fb8;--d:#0f2f73;--g:rgba(61,134,255,.45)}
.k3-stop{--t:#ff4d5e;--b:#c2182c;--d:#7a0d19;--g:rgba(255,77,94,.55);padding:10px 20px 11px}
.k3-link{--t:#3b4d78;--b:#26345a;--d:#141d36;--g:rgba(120,160,255,.25);margin-left:auto;font-weight:700}
@media (max-width:760px){.k3-link{margin-left:0}.ctrl3d{gap:10px}.c3-lab{width:100%}}

/* ===== Tự động sao lưu suốt cuộc thi ===== */
.ab-steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}
.ab-steps > div{display:flex;flex-direction:column;align-items:center;text-align:center;gap:2px;padding:10px 6px;border-radius:12px;
  background:rgba(47,123,255,.08);border:1px solid rgba(76,195,255,.25)}
.ab-steps b{font-size:24px;line-height:1}
.ab-steps span{font-weight:700;color:#fff;font-size:13px}
.ab-steps small{color:#8fb3e0;font-size:11px}
@media (max-width:700px){.ab-steps{grid-template-columns:repeat(2,minmax(0,1fr))}}

/* Thuộc tính hidden luôn thắng mọi kiểu hiển thị (tránh nhãn/khung bị hiện nhầm) */
[hidden]{display:none!important}

/* ===== Đóng băng bảng điểm ===== */
.frz-alert{background:linear-gradient(90deg,rgba(76,195,255,.18),rgba(47,123,255,.08));border:1px solid rgba(143,230,255,.55);color:#dff4ff;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.frz-alert .btn{margin-left:auto}
.frz-panel,.frz-page{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:8px;padding:30px 16px;border-radius:14px;
  background:radial-gradient(circle at 50% 30%,rgba(143,230,255,.18),rgba(4,16,44,.6) 70%);border:1px dashed rgba(143,230,255,.55)}
.frz-panel b,.frz-page h2{color:#e6f8ff;letter-spacing:1px;text-shadow:0 0 12px rgba(143,230,255,.7)}
.frz-panel small{color:#9fc4ee}
.frz-ic{font-size:54px;line-height:1;filter:drop-shadow(0 0 14px rgba(143,230,255,.9));animation:frzPulse 2.4s ease-in-out infinite}
@keyframes frzPulse{50%{transform:scale(1.08);filter:drop-shadow(0 0 22px rgba(143,230,255,1))}}
.big-box.frz{background:rgba(143,230,255,.1);border-color:rgba(143,230,255,.5)}
.frz-mini{font-size:16px}

.frz-wall .frz-panel{padding:40px 16px}
.fz-teams{display:flex;flex-wrap:wrap;justify-content:center;gap:8px 10px;margin-top:10px}
.fz-tm{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:999px;font-weight:700;color:#fff;background:rgba(4,20,56,.7);border:1px solid rgba(160,235,255,.35)}

/* ===== Nhật ký hoạt động ===== */
.log-filter{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.log-filter select,.log-filter input{width:auto;margin:0}
.log-filter input[type=search]{flex:1;min-width:220px}
.log-wrap{max-height:620px}
.log-tb td{vertical-align:top;font-size:12.5px}
.log-tb .lt-detail{max-width:520px;word-break:break-word}
.log-tb .lt-who{font-weight:700;font-size:12px}
.log-tb tr.lt-admin td:first-child{border-left:3px solid #ffd24a}
.log-tb tr.lt-team td:first-child{border-left:3px solid #4cc3ff}
.log-tb tr.lt-system td:first-child{border-left:3px solid #2ee59d}
.log-tb tr.lt-guest td:first-child{border-left:3px solid #8fa6c8}
.log-tb tr.lt-bad td{background:rgba(255,90,90,.08)}
.log-pager{justify-content:center;margin-top:10px}

.dev-tb td{vertical-align:middle;font-size:12.5px}
.dev-tb tr.me td{background:rgba(46,229,157,.07)}

/* ===== Ảnh đại diện (đội tải lên) ===== */
.av.has-img{background:none!important;padding:0;overflow:hidden}
.av.has-img img{width:100%;height:100%;object-fit:cover;display:block;border-radius:50%}
.av-upload{margin:4px 0 8px;padding:10px;border:1px dashed var(--line2,#1f4a8f);border-radius:10px;background:rgba(47,123,255,.06)}
.av-or{display:flex;align-items:center;gap:10px;color:var(--mut);font-size:12px;margin:4px 0 8px}
.av-or::before,.av-or::after{content:"";flex:1;height:1px;background:var(--line)}

/* ===== Ảnh tập thể của đội ===== */
.team-photo{margin:0;cursor:pointer;border-radius:12px;overflow:hidden;position:relative;max-width:380px}
.team-photo img{display:block;width:100%;max-height:260px;object-fit:cover}
.team-photo figcaption{position:absolute;left:0;right:0;bottom:0;padding:10px 14px;font-weight:700;color:#fff;
  background:linear-gradient(0deg,rgba(2,8,24,.85),transparent)}
.team-photo.empty{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;text-align:center;
  min-height:140px;max-width:380px;border:1px dashed var(--line2,#1f4a8f);background:rgba(47,123,255,.06);color:#9fb6d9}
.team-photo.empty .tp-ic{font-size:40px;line-height:1}
.modal.lightbox{display:none;align-items:center;justify-content:center;cursor:zoom-out;background:rgba(0,0,0,.9);z-index:100}
.modal.lightbox.on{display:flex}
.modal.lightbox img{max-width:94vw;max-height:92vh;border-radius:10px;box-shadow:0 0 40px rgba(0,0,0,.7)}

/* ảnh tập thể ở góc trên bên trái khu đầu trang */
.team-hero{position:relative;flex-wrap:wrap}
.hero-photo{order:-1;flex:none;width:104px;height:66px;border-radius:12px;overflow:hidden;cursor:pointer;position:relative;
  border:2px solid rgba(255,255,255,.25);box-shadow:0 4px 14px rgba(0,0,0,.4)}
.hero-photo img{width:100%;height:100%;object-fit:cover;display:block}
.hero-photo .hp-zoom{position:absolute;right:4px;bottom:3px;font-size:12px;background:rgba(2,8,24,.7);border-radius:6px;padding:1px 5px}
.hero-photo:hover{border-color:var(--cy,#4cc3ff)}
@media (max-width:640px){.hero-photo{width:120px;height:76px}}