@font-face{font-family:Manrope;font-weight:600;src:url(../static/fonts/manrope-cyrillic-600-normal.woff2) format('woff2');unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116;font-display:swap}
@font-face{font-family:Manrope;font-weight:600;src:url(../static/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+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;font-display:swap}
@font-face{font-family:Manrope;font-weight:800;src:url(../static/fonts/manrope-cyrillic-800-normal.woff2) format('woff2');unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116;font-display:swap}
@font-face{font-family:Manrope;font-weight:800;src:url(../static/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+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;font-display:swap}
@font-face{font-family:Unbounded;font-weight:700;src:url(../static/fonts/unbounded-cyrillic-700-normal.woff2) format('woff2');unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116;font-display:swap}
@font-face{font-family:Unbounded;font-weight:700;src:url(../static/fonts/unbounded-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+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;font-display:swap}

:root{--bg:#050B16;--panel:#0d1a2b;--panel2:#10213a;--line:#25405f;--text:#EEF3F8;--muted:#A9B8C8;--teal:#7FD1C7;--yellow:#FFD166;--violet:#B39DDB;--pink:#E6A4C4;--green:#9BD27E;--red:#E76F51;--r:18px}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:116px}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;background:var(--bg);color:var(--text);font:600 18px/1.55 Manrope,system-ui,sans-serif;background-image:radial-gradient(circle at 12% 0,rgba(64,170,160,.18),transparent 45%),radial-gradient(circle at 100% 30%,rgba(120,90,200,.14),transparent 45%);background-repeat:no-repeat}
a{color:var(--teal)}
a:focus-visible,button:focus-visible{outline:3px solid var(--yellow);outline-offset:2px}
.wrap{max-width:1040px;margin:0 auto;padding:0 18px}
.skip{position:absolute;left:-999px;top:0;background:var(--yellow);color:#06151A;padding:10px 14px;z-index:20}
.skip:focus{left:8px;top:8px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

.top{position:sticky;top:0;z-index:10;background:rgba(5,11,22,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.top-in{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:56px;flex-wrap:wrap;padding-top:4px;padding-bottom:4px}
.brand{font:700 15px/1.2 Unbounded,sans-serif;color:var(--text);text-decoration:none;display:flex;align-items:center;gap:10px}
.brand-dot{width:14px;height:14px;border-radius:50%;background:var(--teal);box-shadow:0 0 0 4px rgba(127,209,199,.25)}
.top-nav{display:flex;gap:4px}
.top-nav a{color:var(--muted);text-decoration:none;font-weight:800;font-size:16px;padding:10px 12px;border-radius:999px;min-height:44px;display:inline-flex;align-items:center}
.top-nav a[aria-current=page]{color:#06151A;background:var(--teal)}

.hero{padding:34px 0 22px}
.kicker{margin:0 0 10px;font:800 13px/1.2 Manrope;letter-spacing:.14em;text-transform:uppercase;color:var(--teal)}
h1{margin:0 0 8px;font:700 clamp(34px,9vw,56px)/1.08 Unbounded,sans-serif}
.sub{margin:0 0 14px;font:700 20px/1.3 Manrope;color:var(--yellow)}
.lead{margin:0;max-width:44ch;font-size:19px;color:var(--text)}

.toc{position:sticky;top:56px;z-index:9;background:rgba(5,11,22,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.toc-in{display:flex;gap:8px;overflow-x:auto;padding-top:8px;padding-bottom:8px;scrollbar-width:thin}
.toc a{flex:none;color:var(--text);text-decoration:none;font-weight:800;font-size:15px;padding:9px 14px;border:1px solid var(--line);border-radius:999px;min-height:40px;display:inline-flex;align-items:center;white-space:nowrap}
.toc a:hover{border-color:var(--teal)}

.content{padding-bottom:20px}
.sec{padding:34px 0 8px}
.sec+.sec{border-top:1px solid rgba(37,64,95,.6)}
h2{margin:0 0 14px;font:700 clamp(22px,6vw,30px)/1.2 Unbounded,sans-serif}
h3{margin:0 0 10px;font:700 18px/1.3 Unbounded,sans-serif}
.prose{max-width:62ch}
.prose p{margin:0 0 14px}
.prose p.key{padding:14px 16px;border-left:5px solid var(--yellow);background:var(--panel);border-radius:0 var(--r) var(--r) 0}
.src{margin:14px 0 0;font-size:15px;line-height:1.5;color:var(--muted)}
.src a{color:var(--muted)}

/* схемы */
.sch{margin:22px -18px 8px;padding:0 0 14px;background:var(--panel);border-block:1px solid var(--line)}
.sch-title{padding:14px 18px 10px;margin:0;font-size:16px;color:var(--teal)}
.sch-frame{width:100%;line-height:0;background:var(--bg)}
.sch-frame>div{max-width:100%}
.sch-ctl{display:grid;grid-template-columns:1fr 1fr 1fr 1.25fr;gap:6px;padding:12px 10px 0}
.sch-ctl button,.btn,.q-again{font:800 14px/1.1 Manrope;color:var(--text);background:var(--panel2);border:2px solid var(--line);border-radius:14px;min-height:48px;padding:8px 6px;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;text-align:center}
.sch-ctl button:hover:not(:disabled){border-color:var(--teal)}
.sch-ctl button:disabled{opacity:.4;cursor:default}
.sch-ctl .sch-next{background:var(--teal);border-color:var(--teal);color:#06151A}
.sch-ctl .sch-next:disabled{background:var(--panel2);border-color:var(--line);color:var(--text)}
.sch-dots{display:flex;align-items:center;gap:2px;flex-wrap:wrap;padding:8px 12px 0}
.sch-count{margin-right:8px;font-weight:800;font-size:15px;color:var(--muted)}
.sch-dot{width:32px;height:32px;padding:0;background:none;border:0;cursor:pointer;position:relative}
.sch-dot::after{content:"";position:absolute;inset:9px;border-radius:50%;background:var(--line)}
.sch-dot.on::after{background:var(--yellow);inset:6px}
.sch-cap{padding:12px 18px 0}
.sch-text{margin:0;padding:12px 14px;font-size:18px;line-height:1.5;color:var(--text);border-left:5px solid var(--teal);background:rgba(16,31,50,.9);border-radius:0 14px 14px 0}
.sch-text b{color:var(--yellow)}
.scheme-fallback{color:var(--muted)}

/* таблица */
.tbl-wrap{overflow-x:auto;margin:10px 0 4px}
.cmp{border-collapse:collapse;width:100%;min-width:300px;font-size:17px}
.cmp th,.cmp td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
.cmp thead th{background:var(--panel2);color:var(--yellow);font-weight:800}
.cmp tbody th{background:var(--panel);font-weight:800;color:var(--teal)}
.cmp td{background:rgba(13,26,43,.6)}

/* блоки теории */
.blk{margin:0 0 26px}
.blk h3{color:var(--yellow);font-size:17px}
.analogy{padding:12px 14px;border-left:5px solid var(--violet);background:var(--panel);border-radius:0 var(--r) var(--r) 0}
.analogy span{font-weight:800;color:var(--violet)}
.srcs{margin:8px 0 0;font-size:15px;color:var(--muted)}
.srcs summary{cursor:pointer;min-height:40px;display:flex;align-items:center;font-weight:800;color:var(--muted)}
.srcs ul{margin:4px 0 0;padding-left:18px;line-height:1.5}
.srcs li{margin-bottom:6px}
.srcs a{color:var(--teal)}
.mnemo-line{margin:12px 0 4px;padding:12px 14px;border:2px solid var(--violet);border-radius:var(--r);background:var(--panel);font-weight:800}
.mnemo-line span{display:block;font:800 13px/1.2 Manrope;letter-spacing:.1em;text-transform:uppercase;color:var(--violet);margin-bottom:4px}

/* мнемоника */
.mnemo{margin:20px 0 4px;padding:16px;border:2px solid var(--violet);border-radius:var(--r);background:var(--panel)}
.pairs{list-style:none;margin:0 0 12px;padding:0;display:grid;gap:10px}
.pairs li{display:grid;gap:2px;padding:10px 12px;border-radius:12px;background:var(--panel2)}
.pair-label{font:800 13px/1.2 Manrope;letter-spacing:.1em;text-transform:uppercase;color:var(--violet)}
.mnemo p{margin:0}

/* квиз */
.quiz{max-width:640px}
.q-text{font:800 20px/1.4 Manrope;margin:0 0 14px}
.q-opts{display:grid;gap:10px}
.q-opt{display:flex;align-items:center;gap:12px;text-align:left;font:700 18px/1.35 Manrope;color:var(--text);background:var(--panel);border:2px solid var(--line);border-radius:14px;padding:12px 14px;min-height:56px;cursor:pointer}
.q-opt:hover:not(:disabled){border-color:var(--teal)}
.q-letter{flex:none;width:34px;height:34px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;background:var(--panel2);color:var(--teal);font-weight:800}
.q-opt.right{border-color:var(--green);background:rgba(155,210,126,.16)}
.q-opt.wrong{border-color:var(--red);background:rgba(231,111,81,.14)}
.q-opt:disabled{cursor:default}
.q-opt:disabled:not(.right):not(.wrong){opacity:.55}
.q-result{margin-top:14px;padding:14px 16px;border-radius:var(--r);background:var(--panel);border:1px solid var(--line)}
.q-result p{margin:0 0 10px}
.q-verdict{font:800 19px/1.3 Manrope}
.q-verdict.ok{color:var(--green)}.q-verdict.bad{color:var(--red)}
.q-again{margin-top:4px;padding:8px 18px}

/* термины */
.tg{margin:18px 0 8px;color:var(--teal)}
.terms{margin:0;display:grid;gap:8px;grid-template-columns:1fr}
.terms>div{padding:10px 14px;border-radius:12px;background:var(--panel)}
.terms dt{font-weight:800;color:var(--yellow)}
.terms dd{margin:2px 0 0;font-size:17px}

.btn{padding:10px 20px;background:var(--teal);color:#06151A;border-color:var(--teal)}

/* переход к следующей теме */
.next{padding:34px 0 40px}
.next-kicker{margin:0 0 10px;font:800 13px/1 Manrope;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.next-card,.card{display:grid;gap:6px;text-decoration:none;color:var(--text);background:var(--panel);border:2px solid var(--line);border-radius:var(--r);padding:18px;position:relative}
.next-card:hover,.card:hover{border-color:var(--teal)}
.next-title,.card-title{font:700 22px/1.2 Unbounded,sans-serif}
.next-text,.card-text{color:var(--muted)}
.next-go{position:absolute;right:18px;top:16px;font-size:28px;color:var(--teal)}
.card-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:4px}
.card-tags span{font-size:14px;font-weight:800;color:var(--teal);border:1px solid var(--line);border-radius:999px;padding:3px 10px}
.card.soon{opacity:.8;border-style:dashed}
.path{list-style:none;margin:0;padding:0;display:grid;gap:6px;max-width:640px}
.path-arrow{display:block;text-align:center;color:var(--teal);font-size:26px;line-height:1.1;margin-bottom:6px}

.foot{border-top:1px solid var(--line);padding:18px 0 30px;color:var(--muted);font-size:15px}
.foot p{margin:0}

@media (min-width:640px){
 .terms{grid-template-columns:1fr 1fr}
 .pairs{grid-template-columns:repeat(3,1fr)}
 .sch{margin-inline:0;border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
 .sch-ctl button{font-size:16px}
 .sch-ctl{gap:8px;padding:12px 12px 0}
}
@media (min-width:980px){
 body{font-size:19px}
 .sch-grid{display:grid;grid-template-columns:minmax(0,1.7fr) minmax(280px,1fr);align-items:start}
 .sch-cap{padding:14px 18px 0 6px}
 .sch-stage{padding-bottom:4px}
 .sch-frame{border-bottom-right-radius:0}
 .prose p{font-size:19px}
 .sch-text{font-size:18px}
}