/* X.Global · прототип. Структура от кабинета, который понравился Анастасии,
   логотип, шрифты, цвета и скругления от дизайнера X.Global (14.10.2026). */
@font-face{font-family:"Factor A";src:url(/assets/fonts/FactorALight-Regular.ttf) format("truetype");font-weight:300;font-display:swap}
@font-face{font-family:"Factor A";src:url(/assets/fonts/FactorA-Regular.ttf) format("truetype");font-weight:400;font-display:swap}
@font-face{font-family:"Factor A";src:url(/assets/fonts/FactorAMedium-Regular.ttf) format("truetype");font-weight:500;font-display:swap}
@font-face{font-family:"Factor A";src:url(/assets/fonts/FactorA-Bold.ttf) format("truetype");font-weight:600 800;font-display:swap}
@font-face{font-family:"Ouvality";src:url(/assets/fonts/Ouvality.otf) format("opentype");font-display:swap}
/* Caveat только для имитации почерка; self-host, кириллица + латиница */
@font-face{font-family:"Caveat";src:url(/assets/fonts/caveat-cyrillic-500-normal.woff2) format("woff2");font-weight:500;font-display:swap;unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:"Caveat";src:url(/assets/fonts/caveat-latin-500-normal.woff2) format("woff2");font-weight:500;font-display:swap;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}
@font-face{font-family:"Caveat";src:url(/assets/fonts/caveat-cyrillic-600-normal.woff2) format("woff2");font-weight:600;font-display:swap;unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:"Caveat";src:url(/assets/fonts/caveat-latin-600-normal.woff2) format("woff2");font-weight:600;font-display:swap;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}
@font-face{font-family:"Caveat";src:url(/assets/fonts/caveat-cyrillic-700-normal.woff2) format("woff2");font-weight:700;font-display:swap;unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:"Caveat";src:url(/assets/fonts/caveat-latin-700-normal.woff2) format("woff2");font-weight:700;font-display:swap;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{
  color-scheme:light;
  /* палитра дизайнера X.Global (14.10.2026): #E0DACE #D7C1AA #92AAD0 #535B44 #170E05 #FFFFFF, остальное оттенки */
  --bg:#E0DACE;--paper:#FFFFFF;--ink:#170E05;--ink-2:#463D33;--muted:#7A7064;--line:#D3CBBE;
  --accent:#4D6796;--accent-d:#33476E;--accent-l:#92AAD0;--accent-s:#E9EEF6;
  --petal:#E9EEF6;--lav:#E4E6DE;--butter:#F3ECE6;--sage:#E4E6DE;--sky:#E9EEF6;--peach:#EBE0D5;
  --olive:#535B44;--beige:#D7C1AA;
  --ok:#2e7d4f;--ok-bg:#e9f5ed;--ok-line:#bfe0cb;--bad:#c0392b;--bad-bg:#fdecea;
  --pen:#2b3a8f;--dot:rgba(23,14,5,.07);
  --tape-a:rgba(146,170,208,.85);--tape-b:rgba(255,255,255,.7);
  --hud:linear-gradient(120deg,#170E05,#3A402F 55%,#535B44);
  --shadow:0 10px 30px rgba(23,14,5,.07);
  --r:40px;--r-in:22px;
  /* Factor A основной, Ouvality акцентный (рукописный), Caveat только имитация почерка ученика */
  --f-display:"Factor A",-apple-system,BlinkMacSystemFont,"SF Pro Display","Segoe UI",Roboto,Arial,sans-serif;
  --f-hand:"Ouvality","Caveat",cursive;
  --f-pen:"Caveat","Segoe Print",cursive;
  --f-body:"Factor A",-apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",Roboto,Arial,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{font-family:var(--f-body);color:var(--ink);font-size:16px;line-height:1.55;min-height:100vh;
  background:var(--bg) radial-gradient(circle at 1.5px 1.5px,var(--dot) 1.4px,transparent 1.9px) 0 0/22px 22px;}
a{color:inherit;text-decoration:none}
button,input,textarea{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
.wrap{max-width:1010px;margin:0 auto;padding:22px 16px 110px}
.wrap.narrow{max-width:660px}

/* типографика */
.kicker{font-family:var(--f-hand);font-weight:400;font-size:28px;line-height:1;color:var(--accent)}
h1,.h1{font-family:var(--f-display);font-weight:700;font-size:clamp(38px,7vw,60px);line-height:1.05;letter-spacing:-.01em}
h1 em,.h1 em{font-family:var(--f-hand);font-style:normal;font-weight:400;font-size:1.15em;color:var(--accent)}
h2,.h2{font-family:var(--f-display);font-weight:700;font-size:clamp(26px,4.4vw,34px);line-height:1.12}
h3,.h3{font-family:var(--f-display);font-weight:700;font-size:22px;line-height:1.25}
.muted{color:var(--muted)}
.lead{color:var(--ink-2)}
.small{font-size:13.5px}

/* шапка */
.top{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:26px}
.brand{display:flex;align-items:center}
.brand img{display:block;height:56px;width:auto}
@media (max-width:600px){.brand img{height:46px}}
.helpbtn,.chipbtn{display:inline-flex;align-items:center;gap:6px;background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 14px;font-size:14px;font-weight:800;color:var(--accent-d)}
.back{font-weight:700;color:var(--accent-d);font-size:15px}

/* карточки */
.pin{position:relative;display:block;background:var(--paper);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);padding:26px 28px}
.c-petal{background:var(--petal)}.c-sky{background:var(--sky)}.c-lav{background:var(--lav)}
.c-sage{background:var(--sage)}.c-butter{background:var(--butter)}.c-peach{background:var(--peach)}
.tape::before{content:"";position:absolute;top:-12px;left:50%;width:96px;height:24px;transform:translateX(-50%) rotate(-2.5deg);
  background:repeating-linear-gradient(-45deg,var(--tape-a) 0 7px,var(--tape-b) 7px 14px);border-radius:2px;opacity:.95}
.tape.tape-l::before{left:18%;transform:translateX(-50%) rotate(3deg)}
a.pin{transition:transform .18s ease,box-shadow .18s ease}
a.pin:hover{transform:translateY(-2px) rotate(-.3deg);box-shadow:0 16px 36px rgba(23,14,5,.12)}

/* кнопки */
.btn{display:inline-flex;align-items:center;gap:8px;background:var(--accent);color:#fff;font-weight:800;border-radius:999px;padding:13px 22px;box-shadow:0 8px 20px -8px var(--accent);transition:transform .15s}
.btn:hover{transform:translateY(-1px)}
.btn.ghost{background:#fff;color:var(--accent-d);border:1px solid var(--line);box-shadow:none}
.btn.sm{padding:8px 15px;font-size:14px}
.btn.ok{background:var(--ok);box-shadow:0 8px 20px -8px var(--ok)}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{display:inline-flex;align-items:center;gap:6px;background:#fff;border:1px solid var(--line);border-radius:999px;padding:5px 13px;font-size:14px;font-weight:700}
.tag{display:inline-block;font-size:11px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;border-radius:999px;padding:4px 10px;background:var(--accent-s);color:var(--accent-d)}
.tag.ok{background:var(--ok-bg);color:var(--ok)}
.tag.wait{background:var(--butter);color:#8a6a10}
.tag.lav{background:var(--lav);color:var(--olive)}

/* статусы */
.checked-line{display:flex;align-items:center;gap:8px;background:var(--ok-bg);color:var(--ok);border:1px solid var(--ok-line);border-radius:var(--r-in);padding:11px 15px;font-weight:700;font-size:15px}
.verdict{border-radius:14px;padding:9px 14px;font-weight:600;font-size:15px;margin-top:10px}
.verdict.ok{background:var(--ok-bg);color:var(--ok)}
.verdict.bad{background:var(--bad-bg);color:var(--bad)}
.verdict small{display:block;font-weight:500;color:var(--ink-2);margin-top:2px}
.teacher-note{background:var(--lav);border-radius:14px;padding:10px 14px;margin-top:12px;font-size:14.5px}
.teacher-note b{display:block;font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--olive);margin-bottom:2px}

/* плашка с баллами */
.hud{display:flex;align-items:center;gap:14px;background:var(--hud);color:#fff;border-radius:var(--r);padding:12px 14px 12px 16px;box-shadow:0 14px 30px -12px var(--accent-d)}
.hud .flower{width:36px;height:36px;border-radius:50%;background:rgba(255,255,255,.18);display:grid;place-items:center;font-size:18px;flex:none}
.hud .n{font-family:var(--f-display);font-weight:700;font-size:21px;line-height:1}
.hud .s{font-size:12.5px;opacity:.85}
.hud .bar{height:5px;width:140px;border-radius:9px;background:rgba(255,255,255,.25);margin:5px 0 3px;overflow:hidden}
.hud .bar i{display:block;height:100%;width:40%;background:var(--beige);border-radius:9px}
.hud .sp{flex:1}
.hud a{display:inline-flex;gap:6px;align-items:center;font-weight:800;font-size:14px;border-radius:999px;padding:8px 14px;background:rgba(255,255,255,.16)}
.hud a.w{background:#fff;color:var(--accent-d)}
.hud a{white-space:nowrap}

/* поля ответа */
.field{width:100%;border:1.5px dashed var(--accent-l);background:#fff;border-radius:14px;padding:11px 14px;font-size:16px;outline:none;transition:border-color .15s}
.field:focus{border-color:var(--accent);border-style:solid}
.field.ok{border:1.5px solid #8fcfa8;background:var(--ok-bg)}
.field.bad{border:1.5px solid #f0a59c;background:var(--bad-bg)}
.opts{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:8px;margin-top:10px}
/* формулы не ловят нажатия: блоки дробей KaTeX выходят за свои границы, и тап по варианту «x²» уходил в соседний «x⁴/4» */
.katex,.katex *{pointer-events:none}
.opt{border:1.5px solid var(--line);background:#fff;border-radius:14px;padding:11px 12px;text-align:center;font-size:17px;transition:all .15s}
.opt:hover{border-color:var(--accent-l)}
.opt.sel.ok{border-color:#8fcfa8;background:var(--ok-bg)}
.opt.sel.bad{border-color:#f0a59c;background:var(--bad-bg)}

/* чернила */
.inkbox{position:relative;border:1.5px dashed var(--accent-l);border-radius:var(--r-in);background:#fff linear-gradient(transparent 31px,rgba(77,103,150,.09) 32px) 0 8px/100% 32px;overflow:hidden}
.inkbox canvas{display:block;width:100%;height:100%;touch-action:none}
.inkbox .hint{position:absolute;left:14px;top:10px;font-family:var(--f-pen);font-size:20px;color:var(--muted);pointer-events:none;transition:opacity .3s}
.inkbox.has-ink .hint{opacity:0}
.inktools{display:flex;gap:6px;flex-wrap:wrap;margin-top:8px}
.inktools button{border:1px solid var(--line);background:#fff;border-radius:999px;padding:6px 12px;font-size:13.5px;font-weight:700}
.inktools button.on{background:var(--accent);color:#fff;border-color:var(--accent)}

/* прототип: навигация */
.proto{position:fixed;left:50%;bottom:14px;transform:translateX(-50%);z-index:50;display:flex;align-items:center;gap:4px;background:rgba(23,14,5,.92);color:#fff;border-radius:999px;padding:5px;font-size:13px;font-weight:700;box-shadow:0 10px 30px rgba(0,0,0,.25);max-width:calc(100vw - 20px);overflow-x:auto;scrollbar-width:none}
.proto::-webkit-scrollbar{display:none}
.proto span{padding:0 8px 0 10px;opacity:.6;white-space:nowrap;font-family:var(--f-hand);font-size:20px}
.proto a,.proto button{white-space:nowrap;border-radius:999px;padding:7px 12px;color:#fff;opacity:.85}
.proto a.on{background:#fff;color:var(--ink);opacity:1}
.proto button{background:rgba(255,255,255,.12)}

/* анимация входа */
@keyframes rise{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.rise>*{animation:rise .5s ease both}
.rise>*:nth-child(2){animation-delay:.05s}.rise>*:nth-child(3){animation-delay:.1s}.rise>*:nth-child(4){animation-delay:.15s}
.rise>*:nth-child(5){animation-delay:.2s}.rise>*:nth-child(6){animation-delay:.25s}.rise>*:nth-child(7){animation-delay:.3s}
@keyframes blink{0%,100%{box-shadow:var(--shadow)}30%,70%{box-shadow:0 0 0 4px var(--accent),var(--shadow)}}
.blink{animation:blink .7s ease 3}
@media (prefers-reduced-motion:reduce){.rise>*,.blink{animation:none}}

/* иконки дизайнера X.Global */
.ico{display:inline-block;width:1.15em;height:1.15em;vertical-align:-.2em;flex:none;background:center/contain no-repeat}
.ico.info{background-image:url(/assets/icons/info.svg)}.ico.question{background-image:url(/assets/icons/question.svg)}
.ico.important{background-image:url(/assets/icons/important.svg)}.ico.formulas{background-image:url(/assets/icons/formulas.svg)}
.ico.flask{background-image:url(/assets/icons/flask.svg)}

/* ---- платформа: общие элементы ---- */
.top-right{display:flex;align-items:center;gap:8px;flex-wrap:wrap;justify-content:flex-end}
.cond-img{display:block;max-width:100%;border-radius:var(--r-in);margin:10px 0;border:1px solid var(--line)}
#x-toast{position:fixed;left:50%;bottom:22px;transform:translateX(-50%);z-index:200;display:flex;flex-direction:column;gap:8px;align-items:center;pointer-events:none;width:max-content;max-width:calc(100vw - 32px)}
.x-toast{background:var(--ink);color:#fff;border-radius:var(--r-in);padding:11px 18px;font-weight:600;font-size:15px;box-shadow:0 12px 30px rgba(23,14,5,.25);transition:opacity .4s,transform .4s}
.x-toast.ok{background:var(--ok)}.x-toast.bad{background:var(--bad)}
.x-toast.out{opacity:0;transform:translateY(8px)}
.x-modal-back{position:fixed;inset:0;z-index:150;background:rgba(23,14,5,.38);display:flex;align-items:flex-start;justify-content:center;padding:6vh 16px;overflow-y:auto}
.x-modal{width:100%;max-width:560px;position:relative}
.x-modal-x{position:absolute;top:16px;right:18px;width:36px;height:36px;border-radius:50%;background:var(--bg);font-size:16px}
.consent-text{max-height:46vh;overflow:auto;background:var(--bg);border-radius:var(--r-in);padding:14px 16px;margin:12px 0;font-size:14.5px;color:var(--ink-2)}
.consent-check{display:flex;gap:10px;align-items:center;margin:12px 0 16px;font-weight:600}
.consent-check input{width:20px;height:20px;accent-color:var(--accent)}
.btn[disabled]{opacity:.45;pointer-events:none}
.empty{color:var(--muted);text-align:center;padding:26px 10px}
.skeleton{opacity:.5}
input.field,select.field,textarea.field{border-style:solid;border-color:var(--line)}
textarea.field{resize:vertical;min-height:90px;line-height:1.45}
label.lbl-f{display:block;font-size:13px;font-weight:700;color:var(--ink-2);margin:10px 0 4px}
/* акцент без рукописного шрифта: коды групп, даты, латиница (у Ouvality неполная латиница и цифры читаются плохо) */
h1 em.code,.h1 em.code{font-family:var(--f-display);font-style:normal;font-weight:700;font-size:1em}
.kicker .kick-code{font-family:var(--f-body);font-weight:700;font-size:.62em;letter-spacing:.02em}