@font-face{font-family:'Montserrat';font-style:normal;font-weight:400 800;font-display:swap;src:url(/fonts/montserrat-cyrillic-ext.woff2) format('woff2');unicode-range:U+0460-052F, U+1C80-1C8A, U+20B4, U+2DE0-2DFF, U+A640-A69F, U+FE2E-FE2F}
@font-face{font-family:'Montserrat';font-style:normal;font-weight:400 800;font-display:swap;src:url(/fonts/montserrat-cyrillic.woff2) format('woff2');unicode-range:U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116}
@font-face{font-family:'Montserrat';font-style:normal;font-weight:400 800;font-display:swap;src:url(/fonts/montserrat-latin-ext.woff2) format('woff2');unicode-range:U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF}
@font-face{font-family:'Montserrat';font-style:normal;font-weight:400 800;font-display:swap;src:url(/fonts/montserrat-latin.woff2) format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD}
:root{
  --ink:#0f2740;--muted:#5a7085;--blue:#1a4f8a;--blue2:#2d6cb5;--sky:#e8f2fc;--sky2:#f3f8fe;
  --pur:#6b4bb5;--pur2:#8b6fd1;--mint:#e9f4fb;--line:#d5e3f0;--ok:#0d8a6a;--warn:#c47a12;--bad:#c0392b;
  --card:#ffffff;--shadow:0 8px 32px #0f274018;--r:16px;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;font:15px/1.6 "Montserrat","Segoe UI",system-ui,Arial,sans-serif;color:var(--ink);background:#f4f8fc;min-height:100vh}
body::before{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.55;
  background:
    radial-gradient(ellipse 80% 50% at 10% 0%,#c9dbf8aa,transparent 55%),
    radial-gradient(ellipse 60% 40% at 90% 10%,#d8cef5aa,transparent 50%),
    radial-gradient(ellipse 50% 40% at 50% 100%,#cfe8f5aa,transparent 50%),
    url("data:image/svg+xml,%3Csvg%20xmlns='http://www.w3.org/2000/svg'%20width='480'%20height='480'%20viewBox='0%200%20480%20480'%3E%3Cdefs%3E%3Cpattern%20id='g'%20width='24'%20height='24'%20patternUnits='userSpaceOnUse'%3E%3Cpath%20d='M24%200H0V24'%20fill='none'%20stroke='#1a4f8a'%20stroke-opacity='.05'/%3E%3C/pattern%3E%3C/defs%3E%3Crect%20width='480'%20height='480'%20fill='url(#g)'/%3E%3Cg%20fill='none'%20stroke='#1a4f8a'%20stroke-opacity='.13'%20stroke-width='1.4'%3E%3Cpath%20d='M0%20240H480M240%200V480'%20stroke-opacity='.08'/%3E%3Cpath%20d='M60%20120L130%2020L200%20120Z'/%3E%3Ccircle%20cx='380'%20cy='90'%20r='46'/%3E%3Ccircle%20cx='380'%20cy='90'%20r='3'%20fill='#1a4f8a'%20fill-opacity='.15'/%3E%3Cpath%20d='M300%20300h70v70h-70zM300%20300l30-28h70l-30%2028M370%20370l30-28v-70'%20stroke='#6b4bb5'%20stroke-opacity='.14'/%3E%3Cpath%20d='M80%20330l40-22%2040%2022v46l-40%2022-40-22z'%20stroke='#6b4bb5'%20stroke-opacity='.13'/%3E%3Cpath%20d='M200%20440l30-52%2060%200%2030%2052-30%2052'%20stroke-opacity='.1'/%3E%3Cpath%20d='M20%20460Q120%20380%20200%20430T420%20440'%20stroke='#2d9cdb'%20stroke-opacity='.12'/%3E%3Cellipse%20cx='250'%20cy='180'%20rx='34'%20ry='14'%20stroke-opacity='.1'/%3E%3C/g%3E%3Cg%20fill='#1a4f8a'%20fill-opacity='.12'%20font-family='serif'%20font-size='15'%3E%3Ctext%20x='220'%20y='70'%3Ey=kx%2Bb%3C/text%3E%3Ctext%20x='40'%20y='220'%3E%26#960%3Br%26#178%3B%3C/text%3E%3Ctext%20x='400'%20y='220'%3E%26#8721%3B%3C/text%3E%3Ctext%20x='160'%20y='300'%3Ea%26#178%3B%2Bb%26#178%3B=c%26#178%3B%3C/text%3E%3C/g%3E%3C/svg%3E") repeat;
}
a{color:var(--blue2);text-decoration:none}a:hover{text-decoration:underline}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}
header.app{background:linear-gradient(120deg,#0b2d55 0%,#1a4f8a 45%,#4a3d8f 100%);color:#fff;padding:0 20px;position:sticky;top:0;z-index:40;box-shadow:0 4px 20px #0b2d5540}
header.app .bar{max-width:1200px;margin:0 auto;display:flex;align-items:center;gap:14px;min-height:62px;flex-wrap:wrap;padding:10px 0}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;letter-spacing:.2px;cursor:pointer;user-select:none}
.logo .mark{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,#7eb6ff,#b39dff);display:grid;place-items:center;font-size:18px;box-shadow:0 0 0 2px #ffffff33}
.logo span.sub{display:block;font-size:11px;font-weight:500;opacity:.8;margin-top:1px}
nav.top{display:flex;gap:4px;flex-wrap:wrap;flex:1}
nav.top button{background:transparent;border:0;color:#d7e6f8;padding:8px 12px;border-radius:10px;cursor:pointer;font:inherit;font-weight:600;font-size:13.5px}
nav.top button:hover,nav.top button.active{background:#ffffff22;color:#fff}
.userbox{display:flex;align-items:center;gap:8px;margin-left:auto}
.userbox .chip{background:#ffffff1a;border:1px solid #ffffff33;border-radius:20px;padding:5px 12px;font-size:12.5px;font-weight:600}
main{max-width:1200px;margin:22px auto;padding:0 16px 80px}
.page{display:none;animation:fade .25s ease}.page.active{display:block}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:22px;margin:0 0 16px;box-shadow:var(--shadow)}
.card h2{margin:0 0 10px;font-size:22px}.card h3{margin:0 0 10px;font-size:17px}
.hero{background:linear-gradient(120deg,#e4eefc,#ebe6fa 60%,#e8f5f2);padding:32px;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;right:-40px;top:-40px;width:180px;height:180px;border-radius:50%;background:radial-gradient(circle,#6b4bb533,transparent 70%)}
.hero h2{font-size:28px;line-height:1.25;margin:8px 0 10px;max-width:640px}
.pill{display:inline-block;background:#d9e8fb;color:#1a4f8a;border-radius:30px;padding:4px 12px;font-weight:700;font-size:11.5px;letter-spacing:.3px}
.pill.pur{background:#ebe4fb;color:#5a3a9e}.pill.ok{background:#d7f3ea;color:#0a6e54}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px}
.grid3{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:14px}
.two{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.metric{padding:18px;border-radius:14px;background:linear-gradient(145deg,var(--sky),#fff);border:1px solid var(--line)}
.metric b{font-size:26px;display:block;color:var(--blue)}.metric small{color:var(--muted);font-size:12.5px}
.muted{color:var(--muted)}.ok{color:var(--ok)}.bad{color:var(--bad)}.warn{color:var(--warn)}
label{display:block;font-weight:650;margin:12px 0 5px;font-size:13.5px}
input,select,textarea{width:100%;padding:11px 12px;border:1px solid #c5d5e6;border-radius:10px;font:inherit;background:#fff;color:var(--ink)}
textarea{min-height:90px;resize:vertical}input:focus,select:focus,textarea:focus,button:focus-visible{outline:3px solid #7eb6ff88}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
button, .btn{font:inherit;cursor:pointer;border-radius:11px;padding:11px 16px;font-weight:700;border:0;display:inline-flex;align-items:center;gap:7px;transition:transform .12s,box-shadow .12s}
button:active{transform:scale(.98)}
.primary{background:linear-gradient(135deg,var(--blue),var(--pur));color:#fff;box-shadow:0 4px 14px #1a4f8a33}
.primary:hover{box-shadow:0 6px 18px #1a4f8a44}
.secondary{background:#eaf1fa;color:var(--blue);border:1px solid #c5d5e6}
.ghost{background:transparent;color:var(--blue);border:1px solid transparent}
.ghost:hover{background:#eaf1fa}
.danger{background:#fdeceb;color:var(--bad);border:1px solid #f5c6c2}
.sm{padding:7px 12px;font-size:13px;border-radius:9px}
.icon{width:18px;height:18px;flex:0 0 auto}
.notice,.info,.okbox{padding:13px 14px;border-radius:10px;margin:10px 0;border-left:4px solid}
.notice{background:#fff8e8;border-color:#d69a29}.info{background:#eaf3ff;border-color:#4b96c8}.okbox{background:#e7f7f1;border-color:#0d8a6a}
.tablewrap{overflow:auto;max-height:480px;border:1px solid var(--line);border-radius:12px}
table{width:100%;border-collapse:collapse;min-width:640px}th,td{padding:10px 11px;text-align:left;border-bottom:1px solid var(--line);font-size:13.5px}
th{background:#eef4fb;position:sticky;top:0;z-index:1}tr:hover{background:#f7fafd}
.tabs{display:flex;gap:6px;flex-wrap:wrap;margin:0 0 16px}
.tabs button{background:#eaf1fa;color:var(--muted);border:1px solid transparent;padding:9px 14px}
.tabs button.active{background:#fff;color:var(--blue);border-color:var(--line);box-shadow:var(--shadow)}
.side{display:grid;grid-template-columns:240px 1fr;gap:16px}
.side nav{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:10px;box-shadow:var(--shadow);height:fit-content;position:sticky;top:80px}
.side nav button{display:flex;width:100%;align-items:center;gap:10px;background:transparent;border:0;padding:10px 12px;border-radius:10px;color:var(--ink);font-weight:600;text-align:left}
.side nav button.active,.side nav button:hover{background:var(--sky);color:var(--blue)}
.badge{display:inline-flex;align-items:center;gap:4px;background:#ebe4fb;color:#5a3a9e;border-radius:20px;padding:2px 9px;font-size:11.5px;font-weight:700}
.badge.ok{background:#d7f3ea;color:#0a6e54}.badge.warn{background:#fff0d6;color:#9a5b00}.badge.bad{background:#fdeceb;color:#a5281b}
.qcard{border:1px solid var(--line);border-radius:14px;padding:16px;margin:0 0 12px;background:#fbfdff}
.qcard .head{display:flex;justify-content:space-between;gap:8px;margin-bottom:8px;align-items:flex-start}
.opt{display:flex;gap:8px;align-items:flex-start;padding:8px 10px;border-radius:10px;border:1px solid transparent;cursor:pointer;margin:4px 0}
.opt:hover{background:var(--sky)}.opt input{width:auto;margin-top:3px}
.progress{height:10px;background:#e3ebf5;border-radius:20px;overflow:hidden}.progress>i{display:block;height:100%;background:linear-gradient(90deg,var(--blue2),var(--pur));border-radius:20px;transition:width .4s}
.ach{display:flex;gap:12px;align-items:center;padding:12px;border-radius:12px;border:1px solid var(--line);background:#fff}
.ach.off{opacity:.45;filter:grayscale(.6)}.ach .ic{width:42px;height:42px;border-radius:12px;background:linear-gradient(135deg,#7eb6ff,#b39dff);display:grid;place-items:center;color:#fff;font-size:20px}
.chartwrap{height:280px;position:relative}
.lab-wrap{display:grid;grid-template-columns:1fr 280px;gap:14px}
canvas.plot{width:100%;height:360px;background:#0b1f36;border-radius:14px;cursor:crosshair;touch-action:none}
.foot{font-size:12px;color:#6a7f93}.hidden{display:none!important}
.modal-bg{position:fixed;inset:0;background:#0b2d5588;z-index:80;display:flex;align-items:center;justify-content:center;padding:16px}
.modal{background:#fff;border-radius:18px;max-width:560px;width:100%;max-height:90vh;overflow:auto;padding:24px;box-shadow:0 20px 60px #0004}
.modal h3{margin:0 0 12px}
.empty{text-align:center;padding:36px 16px;color:var(--muted)}
.auth-wrap{max-width:440px;margin:40px auto}
.auth-wrap .card{padding:28px}
.split{display:grid;grid-template-columns:1.2fr .8fr;gap:16px}
.toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%);background:#0f2740;color:#fff;padding:11px 18px;border-radius:12px;z-index:99;box-shadow:0 8px 24px #0004;font-weight:600;max-width:90vw}
.steps{padding-left:18px;margin:8px 0}.steps li{margin:6px 0}
@media(max-width:900px){.side{grid-template-columns:1fr}.side nav{position:static;display:flex;overflow:auto;gap:4px;padding:8px}.side nav button{white-space:nowrap;width:auto}.lab-wrap,.split,.two{grid-template-columns:1fr}nav.top{order:3;width:100%}.userbox{margin-left:0}}
@media(max-width:560px){.hero h2{font-size:22px}.metric b{font-size:22px}header.app .bar{gap:8px}}
.recommend{padding:16px;border:1px solid #d5e3f0;border-radius:14px;background:#fbfdff;margin:12px 0}.recommend h4{margin:0 0 8px;color:var(--pur)}.recommend p{margin:6px 0}
#page-research .rpage{display:none}#page-research .rpage.active{display:block}
code{background:#eef3fa;padding:1px 6px;border-radius:6px}
.side>*{min-width:0}#pane{min-width:0}
@media(max-width:900px){header.app{position:relative}}
@media(max-width:900px){nav.top{order:3;flex:1 1 100%;flex-wrap:nowrap;overflow-x:auto}nav.top button{white-space:nowrap;padding:7px 10px}.userbox{margin-left:auto}.userbox .chip{max-width:150px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}header.app .bar{min-height:auto}}
@media(max-width:560px){.logo span.sub{display:none}.logo{font-size:16px}}
/* порталдар */
a.btn{text-decoration:none}a.portal-card{display:block;color:inherit;text-decoration:none;transition:transform .15s,box-shadow .15s}a.portal-card:hover{transform:translateY(-3px);box-shadow:0 14px 40px #0f274025;text-decoration:none}
.portal-card .pc-ic,.auth-head .pc-ic{font-size:34px;width:60px;height:60px;border-radius:16px;display:grid;place-items:center;margin-bottom:10px}
.portal-card.st .pc-ic,.auth-st .pc-ic{background:linear-gradient(135deg,#d6f3ee,#e6ddff)}.portal-card.tc .pc-ic,.auth-tc .pc-ic{background:linear-gradient(135deg,#d9e8fb,#c7d6ef)}
.portal-card.st{border-top:5px solid #8b6fd1}.portal-card.tc{border-top:5px solid #1a4f8a}
.auth-head{display:flex;gap:14px;align-items:center;margin-bottom:14px}.auth-head .pc-ic{margin:0}
.auth-st{border-top:5px solid #8b6fd1}.auth-tc{border-top:5px solid #0b2d55}
body.portal-student header.app{background:linear-gradient(120deg,#3b2a7a 0%,#6b4bb5 50%,#1f8a9a 100%)}
body.portal-student .primary{background:linear-gradient(135deg,#6b4bb5,#1f8a9a)}
body.portal-student .side nav button.active{background:#efe9fb;color:#5a3a9e}
body.portal-teacher header.app{background:linear-gradient(120deg,#071c36 0%,#0b2d55 55%,#1a4f8a 100%)}
.mt{display:none}
body.portal-model header.app{background:linear-gradient(120deg,#0b2d55 0%,#1f6f8b 55%,#6b4bb5 100%)}

/* v3: бүйірлік панель */
.side{grid-template-columns:260px 1fr;align-items:start}
.side nav{position:sticky;top:76px;max-height:calc(100vh - 92px);overflow:auto;padding:12px;display:flex;flex-direction:column;gap:2px}
.side-head{display:flex;gap:10px;align-items:center;padding:6px 8px 12px;border-bottom:1px solid var(--line);margin-bottom:8px}
.side-head .pc-ic{font-size:26px;width:44px;height:44px;display:grid;place-items:center;border-radius:12px;background:var(--sky)}
.side-head b{display:block}.side-head small{color:#6a7f93;display:block;max-width:160px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.side-x,.hamb,.drawer-bg{display:none}
.panel-st nav button.active{background:linear-gradient(90deg,#efe9fb,#e6f6f8);color:#4a2f9a}
.panel-tc nav button.active{background:linear-gradient(90deg,#e4eef9,#eef3fb);color:#0b2d55}
.side nav button.active{box-shadow:inset 3px 0 0 var(--pur)}
.hamb{align-items:center;gap:8px;width:100%;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:10px 14px;font-weight:700;margin-bottom:12px;box-shadow:var(--shadow);color:var(--ink)}
@media(max-width:900px){
 .side{display:block}
 .hamb{display:flex}
 .side nav{position:fixed!important;top:0;left:0;bottom:0;width:min(82vw,300px);max-height:none;z-index:80;border-radius:0 16px 16px 0;transform:translateX(-105%);transition:transform .25s;display:flex!important;flex-direction:column;overflow:auto}
 .side nav button{width:100%!important;white-space:normal!important}
 .side.open nav{transform:none}
 .side.open .drawer-bg{display:block;position:fixed;inset:0;background:#0b2d5566;z-index:70}
 .side-x{display:inline-flex;margin-left:auto}
}
.auth-title{margin:14px 0 4px}.rolepick{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:8px 0}
.rolepick button{padding:14px;border:2px solid var(--line);border-radius:12px;background:#fff;font-weight:700}
.rolepick button.active{border-color:var(--pur);background:#f3effc;color:#4a2f9a}
.mono{font-family:ui-monospace,Consolas,monospace;letter-spacing:.5px}
.model-embed{padding:0;overflow:hidden}.model-embed iframe{width:100%;border:0;min-height:700px;display:block}
html.embed header.app,html.embed .site-foot{display:none!important}html.embed body{background:transparent}
body.logged nav.top{display:none}
@media print{header.app,.side nav,.hamb{display:none}}
#paneWrap,#pane{min-width:0}
@media(min-width:901px){.side-x{display:none!important}}
.topic{border:1px solid var(--line);border-radius:12px;padding:10px 14px;margin:8px 0;background:#fff}
.topic summary{cursor:pointer;font-weight:600}.topic[open]{background:#f7fbff}
.question{font-size:19px;font-weight:700;margin:12px 0;text-align:center}
.opts{display:grid;grid-template-columns:1fr 1fr;gap:10px}@media(max-width:560px){.opts{grid-template-columns:1fr}}
.option-btn{padding:14px;border:2px solid var(--line);border-radius:12px;background:#fff;font-weight:600;font-size:16px;color:var(--ink)}
.option-btn:hover{border-color:var(--blue2)}.option-btn.sel{border-color:var(--pur);background:#f3effc}
.game-card{text-align:center;cursor:pointer;font:inherit;color:inherit}.game-card:hover{transform:translateY(-2px);border-color:var(--pur)}
.g-ic{font-size:36px;font-weight:800;color:var(--pur)}.dbi-big{font-size:56px;font-weight:800;text-align:center;color:var(--pur)}
.game-area{text-align:center;padding:10px}
td.ok,.ok{color:var(--ok)}td.bad,.bad{color:var(--bad)}
.two{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}.grid3{grid-template-columns:repeat(auto-fill,minmax(min(100%,220px),1fr))}
@media(max-width:900px){.two{grid-template-columns:minmax(0,1fr)}}
.two>*,.grid>*,.grid3>*{min-width:0}
button.game-card{display:block;width:100%}
.steps5{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px}
.step{display:flex;gap:10px;align-items:center;text-decoration:none;color:var(--ink);padding:14px}
.step b{width:34px;height:34px;flex:none;border-radius:50%;display:grid;place-items:center;background:var(--sky);color:var(--blue)}
.step.done b{background:var(--ok);color:#fff}ul.clean{padding-left:18px;line-height:1.9}
.card>table{min-width:0}