/* ───────── Шрифты (локально) ───────── */
@font-face{font-family:"Manrope";font-weight:400;font-display:swap;src:url(../vendor/fonts/manrope-cyrillic-400-normal.woff2) format("woff2");unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:"Manrope";font-weight:400;font-display:swap;src:url(../vendor/fonts/manrope-latin-400-normal.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Manrope";font-weight:500;font-display:swap;src:url(../vendor/fonts/manrope-cyrillic-500-normal.woff2) format("woff2");unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:"Manrope";font-weight:500;font-display:swap;src:url(../vendor/fonts/manrope-latin-500-normal.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Manrope";font-weight:600;font-display:swap;src:url(../vendor/fonts/manrope-cyrillic-600-normal.woff2) format("woff2");unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:"Manrope";font-weight:600;font-display:swap;src:url(../vendor/fonts/manrope-latin-600-normal.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Manrope";font-weight:700;font-display:swap;src:url(../vendor/fonts/manrope-cyrillic-700-normal.woff2) format("woff2");unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:"Manrope";font-weight:700;font-display:swap;src:url(../vendor/fonts/manrope-latin-700-normal.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Manrope";font-weight:800;font-display:swap;src:url(../vendor/fonts/manrope-cyrillic-800-normal.woff2) format("woff2");unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:"Manrope";font-weight:800;font-display:swap;src:url(../vendor/fonts/manrope-latin-800-normal.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"JetBrains Mono";font-weight:400;font-display:swap;src:url(../vendor/fonts/jetbrains-mono-cyrillic-400-normal.woff2) format("woff2");unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:"JetBrains Mono";font-weight:400;font-display:swap;src:url(../vendor/fonts/jetbrains-mono-latin-400-normal.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"JetBrains Mono";font-weight:600;font-display:swap;src:url(../vendor/fonts/jetbrains-mono-cyrillic-600-normal.woff2) format("woff2");unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:"JetBrains Mono";font-weight:600;font-display:swap;src:url(../vendor/fonts/jetbrains-mono-latin-600-normal.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}

/* ───────── Токены ───────── */
:root{
  --bg:#211722;
  --bg-soft:#281c2a;
  --panel:#2f2233;
  --panel-2:#392a3e;
  --panel-3:#443347;
  --line:rgba(255,255,255,.09);
  --line-2:rgba(255,255,255,.16);
  --text:#f7eef2;
  --muted:#bda9b6;
  --dim:#907c8a;
  --ruby:#e11d5a;
  --ruby-2:#ff4f86;
  --ruby-deep:#a8123f;
  --ruby-soft:rgba(225,29,90,.16);
  --ruby-glow:rgba(225,29,90,.38);
  --ok:#43d39e;
  --ok-soft:rgba(67,211,158,.14);
  --warn:#f7c04a;
  --warn-soft:rgba(247,192,74,.14);
  --bad:#ff8068;
  --bad-soft:rgba(255,128,104,.14);
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 10px 30px rgba(8,2,10,.35);
  --font:"Manrope",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html,body{margin:0;min-height:100%}
body{
  font-family:var(--font);font-size:15px;line-height:1.55;color:var(--text);
  background:
    radial-gradient(900px 520px at 8% -8%,rgba(225,29,90,.20),transparent 60%),
    radial-gradient(700px 480px at 100% 0%,rgba(168,18,63,.16),transparent 60%),
    var(--bg);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--ruby-2);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{margin:0 0 .5em;line-height:1.2;letter-spacing:-.01em}
h1{font-size:28px;font-weight:800}
h2{font-size:20px;font-weight:700}
h3{font-size:16px;font-weight:700}
p{margin:0 0 .8em}
code,pre,kbd{font-family:var(--mono)}
::selection{background:var(--ruby);color:#fff}
.muted{color:var(--muted)}.dim{color:var(--dim)}.small{font-size:13px}.tiny{font-size:12px}
.nowrap{white-space:nowrap}.right{text-align:right}.center{text-align:center}
.hidden{display:none!important}
.mt{margin-top:16px}.mt-s{margin-top:8px}.mt-l{margin-top:28px}.mb{margin-bottom:16px}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.row.nowrap{flex-wrap:nowrap}
.spread{justify-content:space-between}
.grow{flex:1;min-width:0}
.gap-s{gap:6px}.gap-l{gap:18px}
.stack>*+*{margin-top:12px}

/* ───────── Каркас ───────── */
.shell{display:grid;grid-template-columns:268px 1fr;min-height:100vh}
.sidebar{
  position:sticky;top:0;height:100vh;padding:22px 16px 18px;display:flex;flex-direction:column;gap:6px;
  background:linear-gradient(180deg,rgba(40,28,42,.92),rgba(31,22,33,.96));
  border-right:1px solid var(--line);backdrop-filter:blur(10px);
}
.brand{display:flex;align-items:center;gap:12px;padding:4px 10px 18px}
.brand-mark{width:40px;height:40px;flex:none;filter:drop-shadow(0 6px 14px var(--ruby-glow))}
.brand-name{font-weight:800;font-size:20px;letter-spacing:-.02em;line-height:1.05}
.brand-sub{font-size:12px;color:var(--muted)}
.nav{display:flex;flex-direction:column;gap:3px}
.nav-label{font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--dim);padding:14px 12px 6px}
.nav a{
  display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:12px;color:var(--muted);font-weight:600;text-decoration:none;
  transition:background .15s,color .15s;
}
.nav a svg{width:19px;height:19px;flex:none;opacity:.9}
.nav a:hover{background:rgba(255,255,255,.05);color:var(--text)}
.nav a.active{background:linear-gradient(90deg,rgba(225,29,90,.28),rgba(225,29,90,.08));color:#fff;box-shadow:inset 3px 0 0 var(--ruby)}
.nav .count{margin-left:auto;background:var(--ruby);color:#fff;border-radius:99px;font-size:12px;padding:0 8px;line-height:20px;font-weight:700}
.side-foot{margin-top:auto;padding:12px;border:1px solid var(--line);border-radius:14px;background:rgba(255,255,255,.03)}
.side-foot .who{font-weight:700;line-height:1.2}
.main{padding:34px 40px 70px;min-width:0}
.page{max-width:1180px;margin:0 auto}
.page-head{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;flex-wrap:wrap;margin-bottom:26px}
.page-head p{margin:4px 0 0;color:var(--muted)}
.crumbs{font-size:13px;color:var(--dim);margin-bottom:10px}
.crumbs a{color:var(--muted)}
.topbar{display:none}

@media (max-width:900px){
  .shell{grid-template-columns:1fr}
  .sidebar{position:fixed;inset:0 auto 0 0;width:276px;z-index:50;transform:translateX(-102%);transition:transform .22s;box-shadow:var(--shadow)}
  .sidebar.open{transform:none}
  .scrim{position:fixed;inset:0;background:rgba(10,4,12,.6);z-index:40}
  .topbar{display:flex;align-items:center;gap:12px;padding:12px 16px;position:sticky;top:0;z-index:30;background:rgba(33,23,34,.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
  .main{padding:22px 16px 60px}
  h1{font-size:23px}
}

/* ───────── Кнопки и формы ───────── */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid var(--line-2);background:var(--panel-2);color:var(--text);
  font:inherit;font-weight:700;padding:10px 18px;border-radius:12px;cursor:pointer;transition:transform .08s,background .15s,box-shadow .15s,border-color .15s;text-decoration:none;white-space:nowrap;
}
.btn:hover{background:var(--panel-3);text-decoration:none}
.btn:active{transform:translateY(1px)}
.btn svg{width:17px;height:17px}
.btn-primary{background:linear-gradient(180deg,var(--ruby-2),var(--ruby) 55%,var(--ruby-deep));border-color:rgba(255,255,255,.18);color:#fff;box-shadow:0 8px 22px var(--ruby-glow), inset 0 1px 0 rgba(255,255,255,.25)}
.btn-primary:hover{background:linear-gradient(180deg,#ff6597,var(--ruby-2) 50%,var(--ruby));box-shadow:0 10px 28px var(--ruby-glow), inset 0 1px 0 rgba(255,255,255,.3)}
.btn-ghost{background:transparent}
.btn-danger{background:var(--bad-soft);border-color:rgba(255,128,104,.35);color:var(--bad)}
.btn-danger:hover{background:rgba(255,128,104,.24)}
.btn-ok{background:var(--ok-soft);border-color:rgba(67,211,158,.4);color:var(--ok)}
.btn-ok:hover{background:rgba(67,211,158,.24)}
.btn-sm{padding:6px 12px;font-size:13px;border-radius:10px}
.btn-icon{padding:8px;border-radius:10px}
.btn[disabled]{opacity:.5;pointer-events:none}
.field{display:block;margin-bottom:14px}
.field>span,.label{display:block;font-size:12.5px;font-weight:700;color:var(--muted);margin-bottom:6px;letter-spacing:.02em}
.input,.select,.textarea{
  width:100%;background:rgba(0,0,0,.22);border:1px solid var(--line-2);color:var(--text);border-radius:12px;padding:10px 14px;font:inherit;outline:none;
  transition:border-color .15s,box-shadow .15s;
}
.input:focus,.select:focus,.textarea:focus{border-color:var(--ruby-2);box-shadow:0 0 0 3px var(--ruby-soft)}
.input::placeholder,.textarea::placeholder{color:var(--dim)}
.textarea{resize:vertical;min-height:90px}
.textarea.mono,.input.mono{font-family:var(--mono);font-size:13.5px}
.select{appearance:none;padding-right:34px;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none' stroke='%23bda9b6' stroke-width='2'%3E%3Cpath d='m1 1 5 5 5-5'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 13px center}
.select option{background:#2f2233}
.check{display:flex;align-items:center;gap:10px;cursor:pointer;user-select:none}
.check input{accent-color:var(--ruby);width:17px;height:17px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 16px}
@media (max-width:640px){.form-grid{grid-template-columns:1fr}}
.switch{position:relative;width:42px;height:24px;flex:none;display:inline-block}
.switch input{opacity:0;width:0;height:0}
.switch i{position:absolute;inset:0;border-radius:99px;background:var(--panel-3);border:1px solid var(--line-2);transition:.18s;cursor:pointer}
.switch i::after{content:"";position:absolute;width:18px;height:18px;left:2px;top:2px;border-radius:50%;background:#d8c7d1;transition:.18s}
.switch input:checked+i{background:var(--ruby);border-color:var(--ruby-2)}
.switch input:checked+i::after{transform:translateX(18px);background:#fff}

/* ───────── Карточки, значки ───────── */
.card{background:linear-gradient(180deg,rgba(255,255,255,.035),rgba(255,255,255,.015)),var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:0 1px 0 rgba(255,255,255,.04) inset}
.card.flat{box-shadow:none}
.card.tight{padding:14px 16px}
.card.glow{border-color:rgba(225,29,90,.35);box-shadow:0 14px 40px rgba(225,29,90,.12)}
.card-title{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}
.card-title h2,.card-title h3{margin:0}
.grid{display:grid;gap:18px}
.grid.c2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid.c3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid.c4{grid-template-columns:repeat(4,minmax(0,1fr))}
.grid.auto{grid-template-columns:repeat(auto-fill,minmax(290px,1fr))}
@media (max-width:1000px){.grid.c4{grid-template-columns:repeat(2,minmax(0,1fr))}.grid.c3{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:700px){.grid.c2,.grid.c3,.grid.c4{grid-template-columns:1fr}}
.badge{display:inline-flex;align-items:center;gap:6px;padding:2px 10px;border-radius:99px;font-size:12px;font-weight:700;background:var(--panel-3);color:var(--muted);border:1px solid var(--line)}
.badge.ruby{background:var(--ruby-soft);color:#ff9bb9;border-color:rgba(225,29,90,.4)}
.badge.ok{background:var(--ok-soft);color:var(--ok);border-color:rgba(67,211,158,.35)}
.badge.warn{background:var(--warn-soft);color:var(--warn);border-color:rgba(247,192,74,.35)}
.badge.bad{background:var(--bad-soft);color:var(--bad);border-color:rgba(255,128,104,.35)}
.chip{display:inline-block;padding:1px 9px;border-radius:8px;font-size:12px;font-weight:600;background:rgba(255,255,255,.07);color:var(--muted);margin:0 4px 4px 0}
.progress{height:8px;border-radius:99px;background:rgba(0,0,0,.28);overflow:hidden;border:1px solid var(--line)}
.progress>i{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,var(--ruby-deep),var(--ruby),var(--ruby-2));box-shadow:0 0 12px var(--ruby-glow);transition:width .5s}
.progress.ok>i{background:linear-gradient(90deg,#2aa57b,var(--ok))}
.empty{text-align:center;color:var(--muted);padding:44px 20px;border:1px dashed var(--line-2);border-radius:var(--radius)}
.empty b{display:block;color:var(--text);font-size:17px;margin-bottom:4px}
.stat{padding:18px 20px}
.stat .num{font-size:34px;font-weight:800;letter-spacing:-.03em;line-height:1.05}
.stat .lbl{color:var(--muted);font-size:13px;margin-top:4px}
.stat .num em{font-style:normal;color:var(--ruby-2)}
.dots{display:inline-flex;gap:3px;vertical-align:middle}
.dots i{width:7px;height:7px;border-radius:50%;background:var(--panel-3)}
.dots i.on{background:var(--ruby-2);box-shadow:0 0 8px var(--ruby-glow)}

/* ───────── Курсы ───────── */
.course-card{display:flex;flex-direction:column;gap:12px;position:relative;overflow:hidden;color:inherit;text-decoration:none;transition:transform .15s,border-color .15s,box-shadow .15s}
.course-card:hover{transform:translateY(-3px);border-color:rgba(225,29,90,.5);box-shadow:0 18px 40px rgba(0,0,0,.35);text-decoration:none}
.course-card::before{content:"";position:absolute;right:-60px;top:-60px;width:180px;height:180px;border-radius:50%;background:radial-gradient(circle,var(--ruby-glow),transparent 70%);opacity:.55}
.course-ico{width:46px;height:46px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(145deg,var(--ruby-2),var(--ruby-deep));box-shadow:0 8px 20px var(--ruby-glow);font-weight:800;font-size:16px;color:#fff}
.course-card h3{font-size:18px;margin:0}
.course-card p{color:var(--muted);margin:0;font-size:14px}
.row-link{display:flex;align-items:center;gap:16px;padding:16px 18px;border-radius:14px;border:1px solid var(--line);background:rgba(255,255,255,.02);color:inherit;text-decoration:none;transition:.15s}
.row-link:hover{background:rgba(255,255,255,.05);border-color:rgba(225,29,90,.4);text-decoration:none}
.row-link .ico{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;background:var(--ruby-soft);color:var(--ruby-2);flex:none}
.row-link .ico svg{width:20px;height:20px}
.row-link .meta{width:170px;flex:none}
@media (max-width:640px){.row-link .meta{display:none}}

/* ───────── Навигатор задач ───────── */
.tiles{display:flex;flex-wrap:wrap;gap:8px}
.tile{
  min-width:42px;height:42px;padding:0 10px;display:inline-grid;place-items:center;border-radius:12px;font-weight:800;font-size:15px;
  background:var(--panel-2);border:1px solid var(--line-2);color:var(--muted);text-decoration:none;position:relative;transition:.12s;
}
.tile:hover{border-color:var(--ruby-2);color:#fff;text-decoration:none;transform:translateY(-1px)}
.tile.solved{background:var(--ok-soft);border-color:rgba(67,211,158,.5);color:var(--ok)}
.tile.wrong{background:var(--bad-soft);border-color:rgba(255,128,104,.5);color:var(--bad)}
.tile.pending{background:var(--warn-soft);border-color:rgba(247,192,74,.5);color:var(--warn)}
.tile.current{outline:2px solid var(--ruby-2);outline-offset:2px;color:#fff;box-shadow:0 0 16px var(--ruby-glow)}
.tile small{position:absolute;right:3px;top:1px;font-size:9px;opacity:.8}

/* ───────── Задача ───────── */
.solver{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);gap:20px;align-items:start}
.solver.wide{grid-template-columns:1fr}
@media (max-width:1000px){.solver{grid-template-columns:1fr}}
.statement{font-size:16.5px;line-height:1.7}
.md p{margin:0 0 .85em}.md p:last-child{margin-bottom:0}
.md img{max-width:100%;border-radius:12px;border:1px solid var(--line);margin:6px 0;background:#fff}
.md ul,.md ol{padding-left:24px;margin:0 0 .85em}
.md li{margin:.15em 0}
.md img.fx{display:inline;background:none;border:0;border-radius:0;margin:0 .12em;vertical-align:-.32em;max-width:none;filter:invert(1) brightness(1.15)}
.md code{background:rgba(0,0,0,.3);padding:1px 6px;border-radius:6px;font-size:.9em;color:#ffb3cb}
.md pre{background:rgba(0,0,0,.35);border:1px solid var(--line);border-radius:12px;padding:12px 14px;overflow:auto}
.md pre code{background:none;padding:0;color:var(--text)}
.md table{border-collapse:collapse;margin:6px 0 14px;display:block;overflow:auto;max-width:100%}
.md th,.md td{border:1px solid var(--line-2);padding:6px 12px}
.md th{background:rgba(255,255,255,.06)}
.md h2,.md h3,.md h4{margin:1em 0 .4em}
.md .katex{font-size:1.08em}
.md .math-block{margin:.6em 0;overflow-x:auto;overflow-y:hidden}
.md strong{color:#fff}
.math-block .katex-display{margin:.4em 0}
.callout{border-radius:14px;padding:14px 16px;border:1px solid var(--line-2);background:rgba(255,255,255,.04)}
.callout.ok{background:var(--ok-soft);border-color:rgba(67,211,158,.4)}
.callout.bad{background:var(--bad-soft);border-color:rgba(255,128,104,.4)}
.callout.warn{background:var(--warn-soft);border-color:rgba(247,192,74,.4)}
.callout.ruby{background:var(--ruby-soft);border-color:rgba(225,29,90,.4)}
.callout b.t{display:block;margin-bottom:2px}
.answer-row{display:flex;gap:10px}
.answer-row .input{font-size:17px;font-weight:600}
.hist{display:flex;flex-direction:column;gap:6px;margin-top:14px}
.hist-item{display:flex;align-items:center;gap:10px;padding:8px 12px;border-radius:10px;background:rgba(0,0,0,.2);font-size:13.5px}
.hist-item .dot{width:9px;height:9px;border-radius:50%;flex:none}
.hist-item.ok .dot{background:var(--ok)}.hist-item.bad .dot{background:var(--bad)}.hist-item.wait .dot{background:var(--warn)}
.hist-item code{background:none;font-family:var(--mono);color:var(--text)}
.sol-lock{display:flex;gap:10px;align-items:center;color:var(--dim);font-size:13.5px}
details.fold{border:1px solid var(--line);border-radius:14px;background:rgba(255,255,255,.025);overflow:hidden}
details.fold>summary{padding:12px 16px;cursor:pointer;font-weight:700;list-style:none;display:flex;align-items:center;gap:10px}
details.fold>summary::-webkit-details-marker{display:none}
details.fold>summary::after{content:"▾";margin-left:auto;color:var(--dim);transition:transform .15s}
details.fold[open]>summary::after{transform:rotate(180deg)}
details.fold>div{padding:0 16px 16px}
.attach-prev{display:flex;gap:10px;flex-wrap:wrap;margin-top:10px}
.attach-prev img{height:90px;border-radius:10px;border:1px solid var(--line-2)}
.example{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:8px}
.example pre{margin:0;padding:8px 10px;background:rgba(0,0,0,.3);border-radius:10px;font-size:13px;white-space:pre-wrap}
.example .t{font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--dim);margin-bottom:3px}

/* ───────── Редактор и консоль ───────── */
.ide{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.62fr);gap:16px}
@media (max-width:1100px){.ide{grid-template-columns:1fr}}
.editor-wrap{border:1px solid var(--line-2);border-radius:14px;overflow:hidden;background:#1d1420}
.editor-bar{display:flex;align-items:center;gap:8px;padding:8px 12px;background:rgba(255,255,255,.04);border-bottom:1px solid var(--line);flex-wrap:wrap}
.editor-bar .file{font-family:var(--mono);font-size:12.5px;color:var(--muted);margin-right:auto}
.editor-bar .file i{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--ruby);margin-right:8px;box-shadow:0 0 8px var(--ruby-glow)}
.CodeMirror{height:auto;min-height:260px;font-family:var(--mono);font-size:14px;line-height:1.6;background:transparent;color:#f3e6ee}
.CodeMirror-scroll{min-height:260px;max-height:560px}
.CodeMirror-gutters{background:rgba(0,0,0,.18);border-right:1px solid var(--line)}
.CodeMirror-linenumber{color:#7d6a77}
.CodeMirror-cursor{border-left:2px solid var(--ruby-2)}
.CodeMirror-activeline-background,.CodeMirror-focused .CodeMirror-activeline-background{background:rgba(255,255,255,.04)}
.CodeMirror-selected{background:rgba(225,29,90,.28)!important}
.CodeMirror-matchingbracket{color:#fff!important;background:rgba(225,29,90,.4);border-radius:3px}
.cm-s-ruby .cm-keyword{color:#ff6b9d;font-weight:600}
.cm-s-ruby .cm-builtin{color:#ffb86b}
.cm-s-ruby .cm-def{color:#7fd6ff}
.cm-s-ruby .cm-variable{color:#f3e6ee}
.cm-s-ruby .cm-variable-2{color:#d9c2ff}
.cm-s-ruby .cm-number{color:#9be28c}
.cm-s-ruby .cm-string,.cm-s-ruby .cm-string-2{color:#ffd58a}
.cm-s-ruby .cm-comment{color:#8b7585;font-style:italic}
.cm-s-ruby .cm-operator{color:#ff9bb9}
.cm-s-ruby .cm-atom{color:#ff9bb9}
.cm-s-ruby .cm-meta{color:#ffb86b}
.console{background:#18101a;border:1px solid var(--line-2);border-radius:14px;overflow:hidden;display:flex;flex-direction:column}
.console-tabs{display:flex;border-bottom:1px solid var(--line);background:rgba(255,255,255,.03)}
.console-tabs button{flex:1;background:none;border:0;color:var(--muted);font:inherit;font-weight:700;padding:10px;cursor:pointer;border-bottom:2px solid transparent}
.console-tabs button.on{color:#fff;border-bottom-color:var(--ruby-2);background:rgba(225,29,90,.08)}
.console textarea,.console pre{margin:0;border:0;background:transparent;color:var(--text);font-family:var(--mono);font-size:13.5px;line-height:1.55;padding:12px 14px;width:100%;min-height:200px;max-height:380px;overflow:auto;resize:vertical;outline:none;white-space:pre-wrap;word-break:break-word}
.console pre .err{color:var(--bad)}
.console pre .info{color:var(--dim)}
.py-status{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;color:var(--muted)}
.py-status i{width:8px;height:8px;border-radius:50%;background:var(--warn);animation:pulse 1.1s infinite}
.py-status.ready i{background:var(--ok);animation:none}
.py-status.fail i{background:var(--bad);animation:none}
@keyframes pulse{50%{opacity:.25}}
.tests{display:flex;flex-direction:column;gap:8px}
.test{border:1px solid var(--line);border-radius:12px;background:rgba(0,0,0,.2);overflow:hidden}
.test>summary{display:flex;gap:10px;align-items:center;padding:9px 12px;cursor:pointer;list-style:none}
.test>summary::-webkit-details-marker{display:none}
.test .mark{width:22px;height:22px;border-radius:50%;display:grid;place-items:center;font-size:13px;font-weight:800;flex:none;background:var(--panel-3)}
.test.ok .mark{background:var(--ok-soft);color:var(--ok)}
.test.bad .mark{background:var(--bad-soft);color:var(--bad)}
.test .body{padding:0 12px 12px;display:grid;gap:8px;grid-template-columns:repeat(3,1fr)}
@media (max-width:700px){.test .body{grid-template-columns:1fr}}
.test pre{margin:0;padding:8px 10px;background:rgba(0,0,0,.3);border-radius:8px;font-size:12.5px;white-space:pre-wrap;word-break:break-word}
.test .t{font-size:11px;color:var(--dim);letter-spacing:.08em;text-transform:uppercase;margin-bottom:2px}

/* ───────── Таблицы ───────── */
.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:14px;background:rgba(255,255,255,.02)}
table.t{width:100%;border-collapse:collapse;font-size:14px}
table.t th{text-align:left;font-size:11.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--dim);padding:12px 14px;border-bottom:1px solid var(--line);white-space:nowrap;background:rgba(255,255,255,.025)}
table.t td{padding:12px 14px;border-bottom:1px solid var(--line);vertical-align:middle}
table.t tr:last-child td{border-bottom:0}
table.t tbody tr.click{cursor:pointer}
table.t tbody tr.click:hover{background:rgba(225,29,90,.07)}
.cred{font-family:var(--mono);background:rgba(0,0,0,.3);padding:2px 8px;border-radius:7px;font-size:13px;user-select:all}
.avatar{width:36px;height:36px;border-radius:50%;display:inline-grid;place-items:center;font-weight:800;font-size:14px;background:linear-gradient(145deg,var(--ruby-2),var(--ruby-deep));color:#fff;flex:none}
.toolbar{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:16px}
.toolbar .input{max-width:320px}

/* ───────── Модалки, тосты ───────── */
.overlay{position:fixed;inset:0;z-index:100;background:rgba(14,6,16,.72);backdrop-filter:blur(4px);display:grid;place-items:center;padding:20px;overflow:auto;animation:fade .15s}
@keyframes fade{from{opacity:0}}
.modal{width:min(560px,100%);background:var(--panel);border:1px solid var(--line-2);border-radius:20px;box-shadow:0 30px 80px rgba(0,0,0,.55);animation:pop .18s;max-height:calc(100vh - 40px);display:flex;flex-direction:column}
.modal.wide{width:min(1060px,100%)}
@keyframes pop{from{transform:translateY(10px) scale(.98);opacity:0}}
.modal-head{padding:20px 24px 4px;display:flex;justify-content:space-between;align-items:center;gap:12px}
.modal-head h2{margin:0}
.modal-body{padding:14px 24px 6px;overflow:auto}
.modal-foot{padding:14px 24px 22px;display:flex;gap:10px;justify-content:flex-end;flex-wrap:wrap}
.toasts{position:fixed;right:20px;bottom:20px;z-index:200;display:flex;flex-direction:column;gap:10px}
.toast{background:var(--panel-2);border:1px solid var(--line-2);border-left:4px solid var(--ruby);padding:12px 18px;border-radius:12px;box-shadow:var(--shadow);animation:pop .2s;max-width:380px;font-weight:600}
.toast.ok{border-left-color:var(--ok)}.toast.bad{border-left-color:var(--bad)}
.tabs{display:inline-flex;background:rgba(0,0,0,.25);border:1px solid var(--line);border-radius:12px;padding:4px;gap:2px;flex-wrap:wrap}
.tabs button{background:none;border:0;color:var(--muted);font:inherit;font-weight:700;padding:7px 16px;border-radius:9px;cursor:pointer}
.tabs button.on{background:var(--ruby);color:#fff;box-shadow:0 4px 14px var(--ruby-glow)}

/* ───────── Вход ───────── */
.login-wrap{min-height:100vh;display:grid;place-items:center;padding:24px}
.login-card{width:min(430px,100%);padding:36px 34px 32px;position:relative}
.login-card .brand{justify-content:center;padding-bottom:6px}
.login-card .brand-mark{width:64px;height:64px}
.login-card h1{text-align:center;font-size:26px;margin:10px 0 2px}
.login-card .sub{text-align:center;color:var(--muted);margin-bottom:24px}
.login-glow{position:absolute;inset:-1px;border-radius:var(--radius);pointer-events:none;box-shadow:0 0 80px rgba(225,29,90,.18)}

/* ───────── Разное ───────── */
.bars{display:flex;align-items:flex-end;gap:8px;height:130px;padding-top:10px}
.bars .b{flex:1;display:flex;flex-direction:column;justify-content:flex-end;align-items:center;gap:6px;height:100%}
.bars .b i{width:100%;max-width:34px;border-radius:7px 7px 3px 3px;background:linear-gradient(180deg,var(--ruby-2),var(--ruby-deep));min-height:3px;position:relative}
.bars .b i.ok{background:linear-gradient(180deg,#5fe6b5,#2aa57b);position:absolute;bottom:0;left:0;right:0;border-radius:3px}
.bars .b span{font-size:11px;color:var(--dim)}
.bars .b .bar{position:relative;width:100%;max-width:34px;display:flex;flex-direction:column;justify-content:flex-end}
.import-task{display:grid;grid-template-columns:34px 1fr;gap:12px;padding:16px;border:1px solid var(--line);border-radius:14px;background:rgba(255,255,255,.025)}
.import-task.off{opacity:.45}
.import-task .num{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;background:var(--ruby-soft);color:var(--ruby-2);font-weight:800}
.drop{border:2px dashed var(--line-2);border-radius:18px;padding:46px 20px;text-align:center;color:var(--muted);transition:.15s;cursor:pointer}
.drop:hover,.drop.over{border-color:var(--ruby-2);background:var(--ruby-soft);color:#fff}
.drop svg{width:44px;height:44px;color:var(--ruby-2);margin-bottom:8px}
.test-row{display:grid;grid-template-columns:1fr 1fr auto auto;gap:8px;margin-bottom:8px;align-items:start}
@media (max-width:700px){.test-row{grid-template-columns:1fr 1fr}}
.reorder{display:inline-flex;flex-direction:column}
.reorder button{border:0;background:none;color:var(--dim);cursor:pointer;padding:0 6px;line-height:1;font-size:11px}
.reorder button:hover{color:var(--ruby-2)}
.kv{display:grid;grid-template-columns:130px 1fr;gap:6px 14px;font-size:14px}
.kv dt{color:var(--dim)}.kv dd{margin:0}
.split{display:grid;grid-template-columns:1fr 1fr;gap:18px}
@media (max-width:900px){.split{grid-template-columns:1fr}}
.preview{background:rgba(0,0,0,.2);border:1px solid var(--line);border-radius:12px;padding:14px 16px;min-height:90px}
.spinner{width:22px;height:22px;border-radius:50%;border:3px solid var(--panel-3);border-top-color:var(--ruby-2);animation:spin .8s linear infinite;display:inline-block;vertical-align:middle}
@keyframes spin{to{transform:rotate(360deg)}}
.loading{padding:60px;text-align:center;color:var(--muted)}
hr.sep{border:0;border-top:1px solid var(--line);margin:18px 0}
@media print{
  body{background:#fff;color:#000}
  .sidebar,.topbar,.no-print,.toasts{display:none!important}
  .shell{display:block}.main{padding:0}
  .card{background:#fff;border:1px solid #bbb;color:#000;box-shadow:none}
  .cred{background:#eee;color:#000}
  .muted,.dim{color:#444}
}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-thumb{background:rgba(255,255,255,.14);border-radius:10px;border:2px solid transparent;background-clip:content-box}
::-webkit-scrollbar-thumb:hover{background:rgba(255,255,255,.24);background-clip:content-box;border:2px solid transparent}

.files{display:flex;flex-wrap:wrap;gap:10px}
.file-chip{display:inline-flex;align-items:center;gap:10px;padding:9px 14px;border-radius:12px;background:var(--ruby-soft);border:1px solid rgba(225,29,90,.4);color:#fff;font-weight:700;text-decoration:none}
.file-chip:hover{background:rgba(225,29,90,.28);text-decoration:none}
.file-chip svg{width:18px;height:18px;color:var(--ruby-2)}

/* ───────── Тренажёр ЕГЭ ───────── */
.tr-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(310px,1fr));gap:12px}
.tr-type{display:flex;gap:14px;align-items:center;text-align:left;font:inherit;color:inherit;cursor:pointer;padding:14px 16px;border-radius:var(--radius);
  background:linear-gradient(180deg,rgba(255,255,255,.035),rgba(255,255,255,.015)),var(--panel);border:1px solid var(--line);transition:.15s}
.tr-type:hover{border-color:var(--ruby-2);transform:translateY(-2px);box-shadow:0 8px 24px var(--ruby-soft)}
.tr-no{min-width:54px;height:54px;border-radius:14px;display:grid;place-items:center;font-weight:800;font-size:20px;color:#fff;
  background:linear-gradient(135deg,var(--ruby),var(--ruby-deep));box-shadow:0 4px 14px var(--ruby-glow);padding:0 8px;white-space:nowrap}
.tr-body{flex:1;min-width:0}.tr-title{font-weight:700;line-height:1.3;margin-bottom:2px}
.tr-chips{display:flex;gap:6px;flex-wrap:wrap;margin-top:8px}
.tr-go{color:var(--ruby-2);width:22px;opacity:.6}.tr-type:hover .tr-go{opacity:1}
.tr-variant{display:flex;gap:24px;align-items:center;justify-content:space-between;flex-wrap:wrap;
  background:linear-gradient(135deg,rgba(225,29,90,.22),rgba(255,255,255,.02)),var(--panel);border-color:rgba(255,79,134,.35)}
.tr-variant-text{flex:1;min-width:260px}
.tr-active{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.tr-top{display:flex;gap:14px;align-items:center;flex-wrap:wrap;position:sticky;top:8px;z-index:20;backdrop-filter:blur(8px)}
.tr-timer{font-family:var(--mono);font-weight:700;font-size:18px;padding:4px 12px;border-radius:10px;background:rgba(0,0,0,.25);border:1px solid var(--line)}
.tile.filled{background:var(--ruby-soft);border-color:rgba(255,79,134,.55);color:#fff}
.tr-score{display:flex;gap:26px;align-items:center;flex-wrap:wrap}
.tr-ring{--c:var(--ruby-2);width:112px;height:112px;border-radius:50%;display:grid;place-items:center;
  background:conic-gradient(var(--c) calc(var(--p)*1%),rgba(255,255,255,.1) 0)}
.tr-ring>div{width:88px;height:88px;border-radius:50%;background:var(--panel);display:grid;place-items:center;font-size:24px}
.tr-score.ok .tr-ring{--c:var(--ok)}.tr-score.warn .tr-ring{--c:var(--warn)}.tr-score.bad .tr-ring{--c:var(--bad)}
.tr-big{font-size:38px;font-weight:800;letter-spacing:-.03em;line-height:1.1}
.tr-res.solved{border-left:3px solid var(--ok)}.tr-res.wrong{border-left:3px solid var(--bad)}.tr-res.pending{border-left:3px solid var(--warn)}
.tr-ans{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:14px}
@media (max-width:640px){.tr-ans{grid-template-columns:1fr}}
.tr-val{font-family:var(--mono);font-size:15px;padding:9px 12px;border-radius:10px;margin-top:4px;background:rgba(0,0,0,.22);border:1px solid var(--line);white-space:pre-wrap;word-break:break-all}
.tr-val.ok{border-color:rgba(67,211,158,.45);color:var(--ok)}.tr-val.bad{border-color:rgba(255,128,104,.45);color:var(--bad)}
.pyfiles{display:flex;gap:8px;align-items:center;flex-wrap:wrap;padding:10px 12px;border-bottom:1px solid var(--line);background:rgba(255,255,255,.025)}
.file-chip.on{border-color:rgba(67,211,158,.45);color:var(--ok)}
.file-chip small{opacity:.7;margin-left:4px}.file-chip button{background:none;border:0;color:inherit;cursor:pointer;margin-left:6px;font-size:12px}

table.prog th.c,table.prog td.c{text-align:center;padding:6px 4px;min-width:34px}
.cell{width:30px;height:30px;border-radius:8px;border:1px solid var(--line-2);background:var(--panel-2);color:var(--dim);font:inherit;font-weight:800;cursor:pointer}
.cell:hover{border-color:var(--ruby-2);color:#fff}
.cell.solved{background:var(--ok-soft);border-color:rgba(67,211,158,.5);color:var(--ok)}
.cell.wrong{background:var(--bad-soft);border-color:rgba(255,128,104,.5);color:var(--bad)}
.cell.pending{background:var(--warn-soft);border-color:rgba(247,192,74,.5);color:var(--warn)}
.cell.draft{color:var(--ruby-2);border-color:rgba(255,79,134,.45)}
.cm-readonly .CodeMirror{height:auto;max-height:340px;border-radius:12px}
.course-tabs button{display:inline-flex;align-items:center;gap:8px}
.course-tabs button svg{width:16px;height:16px}

/* ───── Теория (справочник) ───── */
.theory .illo{position:relative;border-radius:16px;background:linear-gradient(160deg,var(--panel-2),var(--panel));border:1px solid var(--line);height:170px;display:grid;place-items:center;margin-bottom:18px;overflow:hidden}
.theory .illo svg{position:relative;width:84%;max-width:380px;height:auto;display:block}
.theory .illo .ax{stroke:rgba(255,255,255,.35);stroke-width:1.5;fill:none}
.theory .illo .d{stroke:#f7eef2;stroke-width:2.4;fill:none;stroke-linejoin:round;stroke-linecap:round}
.theory .illo .g{stroke:var(--ruby-2);stroke-width:2.8;fill:none;stroke-linejoin:round;stroke-linecap:round}
.theory .illo .t{stroke:var(--ok);stroke-width:2.4;fill:none;stroke-linejoin:round;stroke-linecap:round}
.theory .illo .fg{fill:var(--ruby-2)}.theory .illo .ft{fill:var(--ok)}.theory .illo .fd{fill:#f7eef2}
.theory .illo .fdim{fill:rgba(255,79,134,.18)}.theory .illo .ftim{fill:rgba(67,211,158,.16)}
.theory .illo .dash{stroke-dasharray:5 5}
.theory .illo text{fill:var(--muted);font-style:italic;font-size:13px}
.theory .card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:20px 22px;margin:0 0 14px;overflow:hidden}
.theory .card>h4{font-size:1.05rem;margin:0 0 10px;display:flex;align-items:center;gap:.6em;color:var(--text)}
.theory .card>h4::before{content:"";width:8px;height:8px;border-radius:2px;background:var(--ruby);transform:rotate(45deg);flex:none}
.theory .card p{margin:.5em 0;color:var(--muted)}
.theory .frow{display:flex;flex-wrap:wrap;gap:12px;margin:12px 0}
.theory .fbox{flex:1 1 230px;min-width:0;background:var(--bg-soft);border:1px solid var(--line);border-left:3px solid var(--ok);border-radius:12px;padding:14px 16px}
.theory .fbox.gold{border-left-color:var(--ruby-2)}
.theory .fbox .lbl{display:block;font-size:.72rem;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:var(--muted);margin-bottom:8px}
.theory .fcenter{padding:14px 16px;background:var(--bg-soft);border:1px dashed var(--line-2);border-radius:12px;margin:12px 0}
.theory .note{background:var(--ok-soft);border:1px solid rgba(67,211,158,.3);border-radius:12px;padding:12px 16px;margin:14px 0;font-size:.95rem;color:var(--text);display:flex;gap:.7em}
.theory .note svg{flex:none;width:20px;height:20px;color:var(--ok);margin-top:2px}
.theory .note.warn{background:var(--ruby-soft);border-color:rgba(255,79,134,.35)}
.theory .note.warn svg{color:var(--ruby-2)}
.theory ul.clean{list-style:none;padding:0;margin:10px 0}
.theory ul.clean li{position:relative;padding:.3em 0 .3em 1.5em;color:var(--muted)}
.theory ul.clean li::before{content:"";position:absolute;left:.1em;top:.95em;width:7px;height:7px;border-radius:50%;border:2px solid var(--ruby-2)}
.theory .tw{overflow-x:auto;margin:14px 0}
.theory table.mtab{width:max-content;min-width:min(100%,340px);border-collapse:collapse;background:var(--bg-soft);border-radius:12px;overflow:hidden;border:1px solid var(--line)}
.theory table.mtab th,.theory table.mtab td{padding:9px 13px;text-align:center;border:1px solid var(--line)}
.theory table.mtab th{background:var(--ruby-deep);color:#fff;font-weight:700;font-size:.9rem}
.theory table.mtab td:first-child{font-weight:700;background:rgba(255,255,255,.04)}
.theory .eq{display:block;text-align:center;font-size:1.18rem;line-height:2;margin:6px 0;padding:4px 2px;overflow-x:auto;overflow-y:hidden;color:var(--text)}
.theory .m{white-space:nowrap}
.theory math{font-size:1.12em;font-family:'Cambria Math','STIX Two Math','Latin Modern Math',serif}
.theory .eq math{font-size:1.2em}
.theory b{color:var(--text)}