:root{--navy:#13294b;--blue:#1d4e89;--sky:#e8f0fb;--yel:#f2b705;--yel2:#fff6d6;--red:#d62828;--ink:#1c2533;--mut:#5b6676;--line:#dde3ea;--bg:#f4f6f8;--card:#fff;--r:10px}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.65 "Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;overflow-wrap:break-word}
a{color:var(--blue);text-underline-offset:3px}
a:hover{color:var(--red)}
img{max-width:100%;height:auto}
.wrap{max-width:1200px;margin:0 auto;padding:0 16px}
/* шапка: тёмная полоса с дорожной разметкой, не закреплена */
.hd{background:var(--navy);color:#fff;position:relative}
.hd::after{content:"";display:block;height:6px;background:repeating-linear-gradient(90deg,var(--yel) 0 38px,transparent 38px 62px),#24395c}
.hd-in{display:flex;align-items:center;gap:18px;min-height:68px;flex-wrap:wrap}
.logo{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;font-weight:800;font-size:22px;letter-spacing:.2px}
.logo:hover{color:#fff}
.logo small{display:block;font-weight:500;font-size:12.5px;color:#b9c6da;letter-spacing:0}
.mn{display:flex;gap:4px;margin-left:auto;flex-wrap:wrap}
.mn a{color:#e6ecf5;text-decoration:none;padding:8px 11px;border-radius:7px;font-size:15px;font-weight:600}
.mn a:hover,.mn a.on{background:#24406b;color:#fff}
.srch{position:relative;flex:0 1 250px}
.srch input{width:100%;padding:8px 12px;border-radius:7px;border:1px solid #3a5480;background:#1b3560;color:#fff;font:inherit;font-size:15px}
.srch input::placeholder{color:#a9b8cf}
.sugg{position:absolute;left:0;right:0;top:100%;margin-top:4px;background:#fff;border:1px solid var(--line);border-radius:8px;box-shadow:0 10px 28px rgba(0,0,0,.18);z-index:20;max-height:360px;overflow:auto;display:none}
.sugg a{display:block;padding:8px 12px;color:var(--ink);text-decoration:none;font-size:14.5px;line-height:1.35;border-bottom:1px solid #eef1f5}
.sugg a:hover,.sugg a.act{background:var(--sky)}
.sugg small{display:block;color:var(--mut);font-size:12.5px}
.burger{display:none;margin-left:auto;width:44px;height:40px;border:1px solid #3a5480;border-radius:8px;background:transparent;cursor:pointer;position:relative}
.burger span,.burger span::before,.burger span::after{position:absolute;left:11px;width:20px;height:2px;background:#fff;content:"";transition:.2s}
.burger span{top:19px}.burger span::before{top:-6px;left:0}.burger span::after{top:6px;left:0}
.hd.open .burger span{background:transparent}.hd.open .burger span::before{transform:translateY(6px) rotate(45deg)}.hd.open .burger span::after{transform:translateY(-6px) rotate(-45deg)}
/* крошки */
.bc{font-size:14px;color:var(--mut);margin:16px 0 6px;line-height:1.5}
.bc a{color:var(--mut)}
.bc i{font-style:normal;margin:0 7px;color:#9aa5b4}
.bc i::before{content:"\203A"}
/* раскладка */
.lay{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:26px;align-items:start;margin-bottom:30px}
.art,.box,.panel{background:var(--card);border:1px solid var(--line);border-radius:var(--r)}
.art{padding:28px 34px;min-width:0}
h1{font-size:34px;line-height:1.2;margin:0 0 14px;color:var(--navy)}
.art h2{font-size:26px;line-height:1.28;margin:34px 0 12px;color:var(--navy);padding-top:4px;border-top:2px solid #eef2f7}
.art h3{font-size:21px;line-height:1.3;margin:26px 0 10px;color:#1d3557}
.art h4{font-size:18px;margin:20px 0 8px}
.art p{margin:0 0 14px}
.lead{font-size:18.5px;color:#2b3646}
.lead p{margin:0 0 12px}
.art ul,.art ol{padding-left:24px;margin:0 0 16px}
.art li{margin-bottom:6px}
.src{display:inline-block;font-size:13.5px;color:var(--mut);background:#eef2f7;border-radius:6px;padding:3px 10px;margin:0 0 14px}
.note{margin:18px 0;padding:14px 18px;border-left:4px solid var(--yel);background:var(--yel2);border-radius:0 8px 8px 0}
.note p:last-child{margin:0}
figure{margin:20px auto;text-align:center;max-width:min(100%,860px)}
figure img{width:auto;max-width:100%;height:auto;border-radius:8px;border:1px solid var(--line);background:#fff}
figcaption{font-size:14px;color:var(--mut);margin-top:6px}
.fig-main img{max-width:min(100%,820px)}
.ab img{display:inline-block;vertical-align:middle;max-width:100%;height:auto}
.tw{overflow-x:auto;margin:0 0 18px;-webkit-overflow-scrolling:touch;border:1px solid var(--line);border-radius:8px}
.tw table{border-collapse:collapse;width:100%;font-size:15px;min-width:420px}
.tw th,.tw td{border:1px solid var(--line);padding:7px 10px;text-align:left;vertical-align:top}
.tw tr:first-child th,.tw thead th{background:#edf2f9;color:var(--navy)}
.tw tbody tr:nth-child(even) td{background:#fafbfd}
.toc{margin:18px 0 22px;border:1px solid var(--line);border-radius:8px;background:#f8fafc}
.toc summary{cursor:pointer;padding:11px 16px;font-weight:700;color:var(--navy)}
.toc ol{margin:0;padding:0 18px 14px 38px}
.toc li{margin:4px 0}
.toc a{text-decoration:none}
/* боковая колонка */
.aside{display:grid;gap:16px;min-width:0}
.box{padding:18px 20px}
.box b{display:block;color:var(--navy);font-size:17px;margin-bottom:8px}
.box ul{list-style:none;margin:0;padding:0}
.box li{padding:6px 0;border-bottom:1px dashed #e2e7ee;font-size:15px;line-height:1.4}
.box li:last-child{border:0}
.box a{text-decoration:none}
.box.tool{background:linear-gradient(135deg,#13294b,#1d4e89);color:#fff;border:0}
.box.tool b{color:var(--yel)}
.box.tool a{color:#fff;text-decoration:underline}
/* навигация по главам */
.chn{margin:26px 0 0;padding:16px 18px;border-radius:8px;background:var(--sky)}
.chn p{margin:0 0 8px}
.chn .pn{display:flex;gap:12px;flex-wrap:wrap;justify-content:space-between;font-size:15px}
.chn .pn a{max-width:48%}
.chn ol{margin:8px 0 0;padding-left:22px;font-size:15px}
.chn li.cur{font-weight:700}
/* карточки */
.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;text-decoration:none;color:var(--ink);transition:box-shadow .2s,transform .2s;min-width:0}
.card:hover{box-shadow:0 10px 26px rgba(19,41,75,.13);transform:translateY(-2px);color:var(--ink)}
.card img{width:100%;height:auto;aspect-ratio:12/5;object-fit:cover;display:block;background:#e7ecf3;border:0;border-radius:0}
.card-b{padding:12px 16px 16px;display:flex;flex-direction:column;gap:5px}
.card-c{font-size:12.5px;font-weight:700;color:var(--blue);text-transform:uppercase;letter-spacing:.4px}
.card-t{font-weight:700;font-size:17px;line-height:1.3;color:var(--navy)}
.card-d{font-size:14.5px;color:var(--mut);line-height:1.45}
.sec{margin:34px 0}
.sec>h2{font-size:26px;color:var(--navy);margin:0 0 14px;display:flex;align-items:center;gap:10px}
.sec>h2::before{content:"";width:18px;height:6px;background:var(--yel);border-radius:2px;flex:none}
/* главная */
.hero{background:linear-gradient(120deg,#13294b 0%,#1d4e89 70%,#2a6db8 100%);color:#fff;border-radius:14px;padding:34px 34px 30px;margin:22px 0 0;position:relative;overflow:hidden}
.hero h1{color:#fff;font-size:36px;max-width:780px}
.hero p{max-width:760px;color:#dbe5f3;font-size:18px;margin:0 0 18px}
.hero::after{content:"";position:absolute;left:0;right:0;bottom:0;height:8px;background:repeating-linear-gradient(90deg,var(--yel) 0 44px,transparent 44px 72px)}
.tiles{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
.tile{display:block;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.22);border-radius:10px;padding:13px 14px;color:#fff;text-decoration:none;font-weight:700;line-height:1.3}
.tile small{display:block;font-weight:400;color:#c9d6e8;font-size:13.5px;margin-top:4px}
.tile:hover{background:rgba(255,255,255,.2);color:#fff}
.rubs{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.rub{display:flex;gap:14px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:16px;text-decoration:none;color:var(--ink);min-width:0}
.rub:hover{border-color:var(--blue);color:var(--ink)}
.rub svg{flex:none;width:44px;height:44px}
.rub b{display:block;color:var(--navy);font-size:17px;line-height:1.3}
.rub span{display:block;font-size:14px;color:var(--mut);line-height:1.45;margin-top:3px}
.lst{list-style:none;margin:0;padding:0;columns:2;column-gap:30px}
.lst li{break-inside:avoid;padding:7px 0;border-bottom:1px solid #e6ebf1;line-height:1.4}
.lst a{text-decoration:none;font-weight:600}
.lst small{display:block;color:var(--mut);font-size:13.5px;font-weight:400}
.panel{padding:22px 26px}
.pg{display:flex;flex-wrap:wrap;gap:6px;margin:22px 0}
.pg a,.pg span{min-width:40px;text-align:center;padding:7px 10px;border-radius:7px;border:1px solid var(--line);background:#fff;text-decoration:none}
.pg span{background:var(--navy);color:#fff;border-color:var(--navy)}
/* faq и тест */
.faq details{border:1px solid var(--line);border-radius:8px;margin:0 0 10px;background:#fbfcfe}
.faq summary{cursor:pointer;padding:12px 16px;font-weight:700;color:var(--navy)}
.faq details p{margin:0;padding:0 16px 14px}
.quiz{margin-top:30px;padding:18px 20px;border-radius:10px;background:var(--yel2);border:1px solid #f1df9c}
.quiz h2{border:0!important;margin-top:0!important}
.qz{margin:0 0 14px}
.qz-q{font-weight:700;margin:0 0 8px}
.qz button{display:block;width:100%;text-align:left;margin:0 0 6px;padding:9px 12px;border:1px solid #e3d59f;border-radius:7px;background:#fff;font:inherit;font-size:15.5px;cursor:pointer;color:var(--ink)}
.qz button.ok{background:#dcf5e3;border-color:#3e9b5c}
.qz button.no{background:#fde2e2;border-color:var(--red)}
.qz-w{display:none;font-size:14.5px;color:#4a4a4a;margin:4px 0 0}
.qz.done .qz-w{display:block}
/* инструменты */
.tool-w{margin:22px 0;padding:20px;border:2px solid var(--navy);border-radius:12px;background:#fff}
.tool-w h3{margin:0 0 4px!important;color:var(--navy)}
.tool-w .sub{color:var(--mut);font-size:14.5px;margin:0 0 14px}
.tg{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:12px;margin-bottom:14px}
.tg label{display:flex;flex-direction:column;gap:4px;font-size:14px;font-weight:600;color:#334}
.tg input,.tg select{font:inherit;font-size:16px;padding:8px 10px;border:1px solid #c5cfdb;border-radius:7px;background:#fff;width:100%;min-width:0}
.tbtn{display:inline-block;padding:10px 18px;border:0;border-radius:8px;background:var(--yel);color:var(--navy);font:inherit;font-weight:800;cursor:pointer}
.tbtn:hover{background:#ffc928}
.tres{margin-top:14px;padding:14px 16px;border-radius:8px;background:var(--sky);font-size:16px}
.tres b{color:var(--navy)}
.tres .big{font-size:26px;font-weight:800;color:var(--navy);display:block;line-height:1.2}
.lay-svg{display:block;width:100%;max-width:640px;height:auto;margin:10px 0 0}
.inc-pick{display:flex;flex-wrap:wrap;gap:6px;margin:0 0 12px}
.inc-pick button{padding:7px 12px;border-radius:7px;border:1px solid #c5cfdb;background:#fff;font:inherit;font-weight:700;cursor:pointer;color:var(--navy)}
.inc-pick button.on{background:var(--navy);color:#fff;border-color:var(--navy)}
.inc-t td.s{background:#fde9c4;font-weight:700}
.inc-t td.b{background:#d9e8fb;font-weight:700}
.inc-t td.r{outline:2px solid var(--red);outline-offset:-2px}
.tool-n{font-size:14px;color:var(--mut)}
/* подвал */
.ft{background:var(--navy);color:#cfd9e8;margin-top:40px;font-size:15px}
.ft::before{content:"";display:block;height:6px;background:repeating-linear-gradient(90deg,var(--yel) 0 38px,transparent 38px 62px),#24395c}
.ft-in{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:28px;padding:30px 16px}
.ft a{color:#fff}
.ft ul{list-style:none;margin:0;padding:0}
.ft li{margin:0 0 6px}
.ft-h{color:var(--yel);font-weight:800;margin-bottom:8px}
.ft-c{border-top:1px solid #2b4470;padding:14px 16px 20px;font-size:13.5px;color:#9fb0c8}
.e404{text-align:center;padding:40px 20px}
.e404 .code{font-size:96px;font-weight:900;color:var(--navy);line-height:1}
.e404 .sign{display:inline-block;margin:8px 0 18px;padding:10px 22px;border:4px solid var(--red);border-radius:50px;font-weight:800;color:var(--red)}
@media (max-width:1020px){.lay{grid-template-columns:1fr}.cards{grid-template-columns:repeat(2,minmax(0,1fr))}.rubs{grid-template-columns:repeat(2,minmax(0,1fr))}.tiles{grid-template-columns:repeat(2,minmax(0,1fr))}.srch{flex-basis:200px}}
@media (max-width:860px){.burger{display:block}.mn{display:none;width:100%;flex-direction:column;padding:0 0 12px}.hd.open .mn{display:flex}.srch{order:3;flex:1 1 100%;margin-bottom:12px}.hd-in{gap:10px;padding-top:10px}}
@media (max-width:640px){body{font-size:16.5px}h1,.hero h1{font-size:26px}.art{padding:18px 16px}.art h2{font-size:22px}.art h3{font-size:19px}.cards,.rubs,.tiles{grid-template-columns:1fr}.lst{columns:1}.ft-in{grid-template-columns:1fr}.hero{padding:24px 18px 26px}.panel{padding:18px 16px}.chn .pn a{max-width:100%}.lead{font-size:17px}.e404 .code{font-size:70px}}