:root{
  --bg:#F0F8FF; --card:#FFFFFF; --ink:#292C55; --muted:#5B6080; --line:#E3E7F3; --soft:#EEF1F8;
  --blue:#3B45FF; --blue-ink:#2B34D6; --blue-soft:#EDEFFF;
  --red:#E22442; --red-ink:#B0122E; --red-soft:#FFE5E9; --pink:#FF3E58;
  --green:#146B48; --green-soft:#E3F6EE; --green-line:#2FA878;
  --amber:#8A4B00; --amber-soft:#FFF1DC; --teal:#0E6370; --teal-soft:#DDF3F5;
  --r-lg:26px; --r-md:18px; --r-sm:12px;
  --shadow:0 2px 12px rgba(41,44,85,.07);
}
*{box-sizing:border-box}
html,body{margin:0}
body{background:var(--bg);color:var(--ink);font-family:Onest,'Segoe UI',system-ui,-apple-system,sans-serif;font-size:16px;line-height:1.45}
a{color:var(--blue)} a:hover{color:var(--ink)}
h1,h2,h3,.mont{font-family:Montserrat,Onest,sans-serif;letter-spacing:-.01em}
h1{font-size:32px;margin:0;font-weight:700}
h2{font-size:21px;margin:0;font-weight:700}
h3{font-size:17px;margin:0;font-weight:700}
p{margin:0}
.layout{display:flex;flex-wrap:wrap;min-height:100vh;align-items:stretch}
.side{flex:0 0 250px;background:#fff;border-right:1px solid var(--line);padding:24px 18px;display:flex;flex-direction:column;gap:22px}
.side .logo img{width:180px;height:auto;display:block}
.side .logo span{display:block;font-size:13px;color:var(--muted);margin:6px 0 0 4px}
.nav{display:flex;flex-direction:column;gap:4px}
.nav a{display:flex;align-items:center;gap:12px;min-height:44px;padding:0 14px;border-radius:14px;text-decoration:none;color:var(--ink);font-weight:500;font-size:15px}
.nav a .dot{width:8px;height:8px;border-radius:50%;background:#C9D2EA;flex:0 0 auto}
.nav a.on{background:var(--blue-soft);color:var(--blue)} .nav a.on .dot{background:var(--blue)}
.nav a:hover{background:#F5F6FF}
.badge{margin-left:auto;min-width:22px;height:22px;padding:0 6px;border-radius:11px;background:var(--pink);color:#fff;font-size:12px;font-weight:700;display:inline-flex;align-items:center;justify-content:center}
.me{margin-top:auto;display:flex;flex-direction:column;gap:8px;padding:14px;border-radius:18px;background:var(--bg)}
.me b{font-size:15px} .me small{font-size:13px;color:var(--muted)}
.me .links{display:flex;gap:12px;font-size:13px}
.main{flex:999 1 560px;min-width:0;padding:30px clamp(16px,3vw,44px) 60px;display:flex;flex-direction:column;gap:20px;max-width:1240px}
.head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:14px}
.head .sub{font-size:15px;color:var(--muted);margin-top:6px}
.card{background:var(--card);border-radius:var(--r-lg);box-shadow:var(--shadow);padding:22px 24px}
.card.tight{padding:16px 18px}
.card.dark{background:var(--ink);color:#fff}
.card.dark .muted{color:rgba(255,255,255,.75)}
.grid{display:grid;gap:18px}
.g2{grid-template-columns:repeat(auto-fit,minmax(320px,1fr))}
.g3{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.g4{grid-template-columns:repeat(auto-fit,minmax(180px,1fr))}
.row{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.col{display:flex;flex-direction:column;gap:10px}
.between{justify-content:space-between}
.muted{color:var(--muted)} .small{font-size:13px} .tiny{font-size:12px}
.big{font-family:Montserrat,sans-serif;font-weight:700;font-size:34px;line-height:1}
.stat{display:flex;flex-direction:column;gap:6px}
.chip{display:inline-flex;align-items:center;gap:6px;padding:4px 11px;border-radius:999px;font-size:13px;font-weight:700;white-space:nowrap;background:var(--soft);color:var(--ink)}
.chip.blue{background:var(--blue-soft);color:var(--blue-ink)} .chip.red{background:var(--red-soft);color:var(--red-ink)}
.chip.green{background:var(--green-soft);color:var(--green)} .chip.amber{background:var(--amber-soft);color:var(--amber)}
.chip.teal{background:var(--teal-soft);color:var(--teal)} .chip.navy{background:#E6E8F2;color:var(--ink)}
.chip.pink{background:var(--pink);color:#fff} .chip.gray{background:var(--soft);color:var(--muted)}
.chip.solid{background:var(--ink);color:#fff} .chip.solidblue{background:var(--blue);color:#fff} .chip.solidred{background:var(--pink);color:#fff}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 18px;border-radius:999px;border:0;background:var(--blue);color:#fff;font:inherit;font-size:15px;font-weight:700;cursor:pointer;text-decoration:none;white-space:nowrap}
.btn:hover{color:#fff;filter:brightness(.95)}
.btn.red{background:var(--red)} .btn.dark{background:var(--ink)} .btn.green{background:var(--green)}
.btn.ghost{background:#fff;color:var(--ink);border:2px solid #C9D2EA} .btn.ghost:hover{color:var(--ink);border-color:var(--blue)}
.btn.sm{min-height:36px;padding:0 14px;font-size:14px}
.btn.wide{width:100%}
.btn[disabled]{opacity:.5;cursor:not-allowed}
.linkbtn{background:none;border:0;padding:0;font:inherit;color:var(--blue);cursor:pointer;text-decoration:underline}
input[type=text],input[type=password],input[type=date],input[type=time],input[type=number],input[type=tel],input[type=url],select,textarea{font:inherit;font-size:15px;color:var(--ink);background:#fff;border:2px solid #D5DBEE;border-radius:14px;padding:10px 14px;min-height:46px;width:100%}
textarea{min-height:120px;resize:vertical;line-height:1.5}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--blue)}
label.f{display:flex;flex-direction:column;gap:6px;font-size:14px;font-weight:600}
label.f small{font-weight:400;color:var(--muted)}
.form{display:grid;gap:14px}
.form .two{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:12px}
.flash{padding:12px 16px;border-radius:14px;font-weight:600;font-size:15px}
.flash.ok{background:var(--green-soft);color:var(--green)} .flash.error{background:var(--red-soft);color:var(--red-ink)}
.creds{border-radius:18px;padding:16px 18px;background:var(--amber-soft);color:#4A2B00;display:flex;flex-direction:column;gap:6px}
.creds code{font-size:17px;font-weight:700;background:#fff;padding:2px 8px;border-radius:8px}
table.t{width:100%;border-collapse:collapse;font-size:15px}
table.t th{text-align:left;font-size:12px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);padding:8px 10px}
table.t td{padding:12px 10px;border-top:1px solid var(--soft);vertical-align:middle}
table.t tr.dim td{opacity:.55}
.scroll{overflow-x:auto}
.tabs{display:flex;flex-wrap:wrap;gap:6px;padding:4px;border-radius:999px;background:rgba(41,44,85,.07)}
.tabs a{min-height:40px;padding:0 16px;border-radius:999px;display:inline-flex;align-items:center;text-decoration:none;color:var(--ink);font-weight:600;font-size:14px}
.tabs a.on{background:var(--blue);color:#fff}
.tile{position:relative;overflow:hidden;display:flex;flex-direction:column;gap:10px;padding:22px 24px 20px 32px;border-radius:24px;background:#fff;box-shadow:var(--shadow);text-decoration:none;color:var(--ink);border:2px solid transparent}
.tile:hover{border-color:#C9CEFF;color:var(--ink)}
.tile::before{content:'';position:absolute;left:0;top:0;bottom:0;width:9px;background:var(--red)}
.tile.late{border-color:var(--pink)}
.tile .ttl{font-family:Montserrat,sans-serif;font-weight:700;font-size:21px;line-height:1.2}
.bar{height:8px;border-radius:4px;background:var(--soft);overflow:hidden}
.bar>span{display:block;height:100%;border-radius:4px;background:var(--red)}
.bar.blue>span{background:var(--blue)}
.list-row{display:flex;align-items:center;gap:14px;padding:12px 0;border-top:1px solid var(--soft)}
.list-row:first-child{border-top:0}
.timebox{flex:0 0 auto;min-width:64px;font-family:Montserrat,sans-serif;font-weight:700;font-size:18px}
.empty{padding:28px;text-align:center;color:var(--muted)}
details.les{border-radius:14px}
details.les>summary{list-style:none;cursor:pointer;display:grid;grid-template-columns:40px minmax(0,1fr) 90px 150px;gap:12px;align-items:center;padding:10px 10px;border-radius:14px}
details.les>summary::-webkit-details-marker{display:none}
details.les[open]>summary,details.les>summary:hover{background:#F5F6FF}
.num{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:10px;background:#F0F2F8;font-family:Montserrat,sans-serif;font-weight:800;font-size:13px}
details.les[open] .num{background:var(--blue);color:#fff}
.files{display:flex;flex-wrap:wrap;gap:8px}
.file{display:inline-flex;align-items:center;gap:8px;padding:9px 12px;border-radius:12px;background:var(--bg);color:var(--ink);text-decoration:none;font-size:14px;font-weight:600}
.file:hover{background:var(--blue-soft);color:var(--ink)}
.file .pdf{padding:3px 6px;border-radius:6px;background:var(--blue);color:#fff;font-size:10px;font-weight:800}
.file.hw .pdf{background:var(--red)} .file.cheat .pdf{background:var(--ink)} .file.extra .pdf{background:var(--green)} .file.key .pdf{background:var(--amber)}
.file.main{border:2px solid var(--red);background:#FFF5F7}
/* homework */
.hw-wrap{display:flex;flex-wrap:wrap;gap:22px;align-items:flex-start}
.hw-main{flex:999 1 520px;min-width:0;display:flex;flex-direction:column;gap:14px}
.hw-side{flex:1 1 300px;max-width:370px;position:sticky;top:20px;display:flex;flex-direction:column;gap:16px}
.task{border-radius:24px;border:2px solid #C9D2EA;background:#fff;box-shadow:0 2px 10px rgba(41,44,85,.05);padding:20px 24px;display:flex;flex-direction:column;gap:14px;scroll-margin-top:20px}
.task.filled{border-color:var(--blue)} .task.ok{border-color:var(--green-line)} .task.bad{border-color:var(--pink)} .task.wait{border-color:#FFB020}
.task .num-pill{padding:6px 14px;border-radius:10px;background:var(--ink);color:#fff;font-family:Montserrat,sans-serif;font-weight:700;font-size:15px}
.task .instr{font-size:18px;line-height:1.4;font-weight:700}
.task .body{padding:14px 18px;border-radius:16px;border:1.5px solid var(--line);background:#FAFBFF;font-size:18px;line-height:1.65;display:flex;flex-direction:column;gap:6px}
.task .body pre{margin:0;font-family:'PT Mono',Menlo,Consolas,monospace;font-size:14px;line-height:1.5;white-space:pre;overflow-x:auto}
.shared{border-radius:20px;background:#fff;border:2px dashed #C9D2EA;padding:18px 22px;display:flex;flex-direction:column;gap:8px;font-size:17px;line-height:1.65}
.shared .lbl{font-size:12px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.ans{display:flex;flex-wrap:wrap;align-items:center;gap:12px}
.ans input[type=text]{width:220px;font-size:20px;font-weight:700;letter-spacing:.08em}
.ans input.ok{border-color:var(--green-line);background:var(--green-soft)} .ans input.bad{border-color:var(--pink);background:var(--red-soft)}
.expl{border-top:1px solid var(--soft);padding-top:12px;font-size:15px;line-height:1.5;color:var(--muted)}
.expl b{color:var(--ink)}
.drop{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;min-height:96px;border-radius:18px;border:2px dashed #B9C0FF;background:#F5F6FF;color:var(--blue-ink);cursor:pointer;text-align:center;padding:12px}
.drop input{display:none}
.thumbs{display:flex;flex-wrap:wrap;gap:10px}
.thumb{position:relative;display:flex;flex-direction:column;gap:4px;width:120px;font-size:12px}
.thumb img{width:120px;height:120px;object-fit:cover;border-radius:12px;border:1px solid var(--line);background:#fff}
.thumb .pdfbox{width:120px;height:120px;border-radius:12px;background:var(--red-soft);color:var(--red-ink);display:flex;align-items:center;justify-content:center;font-weight:800}
.crit{display:grid;grid-template-columns:repeat(auto-fill,minmax(92px,1fr));gap:8px}
.crit label{display:flex;flex-direction:column;gap:4px;font-size:13px;font-weight:700}
.crit select{min-height:40px;padding:6px 10px}
.verdict{display:flex;gap:8px;flex-wrap:wrap}
.verdict label{display:inline-flex;align-items:center;gap:8px;padding:8px 14px;border-radius:999px;border:2px solid #D5DBEE;font-weight:700;cursor:pointer}
.verdict input:checked+span{color:var(--blue)}
.key{border-radius:16px;background:var(--amber-soft);color:#4A2B00;padding:12px 16px;font-size:15px;line-height:1.5}
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}
.login{width:100%;max-width:420px}
@media (max-width:760px){
  .side{flex:1 1 100%;flex-direction:row;flex-wrap:wrap;align-items:center;gap:10px;padding:12px 14px;border-right:0;border-bottom:1px solid var(--line)}
  .side .logo img{width:140px}.side .logo span{display:none}
  .nav{flex-direction:row;flex-wrap:wrap;width:100%;gap:4px}
  .nav a{min-height:38px;padding:0 10px;font-size:14px}.nav a .dot{display:none}
  .me{margin:0;flex-direction:row;flex-wrap:wrap;align-items:center;padding:8px 12px;width:100%}
  .main{padding:18px 14px 50px}
  h1{font-size:26px}
  .hw-side{position:static;max-width:none}
  details.les>summary{grid-template-columns:36px minmax(0,1fr);}
  details.les>summary .hide-m{display:none}
  .task{padding:16px}
  .task .body{font-size:17px;padding:12px}
}
.side .logo{text-decoration:none}
.hw-side .files{flex-direction:column}
.hw-side .file{width:100%}
/* большие мониторы: всё крупнее и на всю ширину */
.main{max-width:none}
:root{--z:1}
body{zoom:var(--z)}
.layout,.login-wrap{min-height:calc(100vh / var(--z))}
@media (min-width:1500px){ :root{--z:1.12} .side{flex-basis:270px} }
@media (min-width:1800px){ :root{--z:1.25} }
@media (min-width:2300px){ :root{--z:1.4} }