*{box-sizing:border-box}
body{margin:0;font-family:"Open Sans",Arial,sans-serif;color:#2b2d33;background:#f4f6f9;line-height:1.65;font-size:17px}
a{color:#0252a8}
.s-wrap{max-width:1140px;margin:0 auto;padding:0 20px}
.s-header{background:#fff;box-shadow:0 1px 0 #e3e6ea;position:sticky;top:0;z-index:10}
.s-header__in{display:flex;align-items:center;gap:24px;min-height:64px;flex-wrap:wrap}
.s-logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:#0252a8;font-size:18px;font-weight:600}
.s-logo img{width:40px;height:auto}
.s-nav{display:flex;gap:20px;margin-left:auto}
.s-nav a{text-decoration:none;color:#2b2d33;font-weight:600;font-size:15px}
.s-nav a:hover{color:#0252a8}
.s-phone{color:#BF6B6B;font-size:16px;font-style:italic}
.s-hero{background:linear-gradient(135deg,#0b2f5c,#0252a8 60%,#2b9fd8);color:#fff;padding:64px 0 56px;text-align:center}
.s-hero h1{font-size:44px;margin:0 0 16px;line-height:1.2}
.s-hero p{max-width:760px;margin:0 auto 28px;font-size:19px;opacity:.95}
.s-cta__btns{display:flex;gap:12px;flex-wrap:wrap;justify-content:center}
.s-btn{display:inline-block;padding:14px 26px;border-radius:6px;text-decoration:none;font-weight:700;font-size:16px;text-align:center}
.s-btn--red{background:#e2353b;color:#fff}.s-btn--red:hover{background:#c92a30}
.s-btn--blue{background:#2b9fd8;color:#fff}.s-btn--blue:hover{background:#1f86bb}
.s-btn--ghost{border:2px solid #fff;color:#fff}
.s-btn--full{display:block;margin-top:16px}
.s-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:20px;margin:40px 0}
.s-card{background:#fff;border-radius:10px;padding:24px;text-decoration:none;color:#2b2d33;box-shadow:0 2px 10px rgba(0,0,0,.06);display:flex;flex-direction:column;gap:8px;transition:transform .15s}
.s-card:hover{transform:translateY(-3px)}
.s-card__n{color:#e2353b;font-weight:700;font-size:13px;text-transform:uppercase;letter-spacing:.05em}
.s-card__t{font-size:20px;font-weight:700;color:#0252a8;line-height:1.3}
.s-card__d{font-size:15px;color:#5b5f69}
.s-grid{display:grid;grid-template-columns:1fr 300px;gap:32px;padding-top:32px;padding-bottom:48px}
.s-article{background:#fff;border-radius:10px;padding:36px 44px;box-shadow:0 2px 10px rgba(0,0,0,.06);min-width:0}
.s-article h1{font-size:34px;line-height:1.25;margin:6px 0 16px;color:#0b2f5c}
.s-article h2{font-size:25px;margin:34px 0 12px;color:#0b2f5c}
.s-article h3{font-size:20px;margin:24px 0 8px}
.s-crumbs{font-size:14px;color:#7a7f8a}.s-crumbs a{color:#7a7f8a}
.s-kicker{color:#e2353b;font-weight:700;font-size:14px;margin:18px 0 0}
.s-lead{font-size:19px;color:#454a55}
.s-tip{background:#eef7fd;border-left:4px solid #2b9fd8;padding:14px 18px;border-radius:4px;margin:20px 0}
.s-warn{background:#fff4f4;border-left:4px solid #e2353b;padding:14px 18px;border-radius:4px;margin:20px 0}
.s-article table{border-collapse:collapse;width:100%;margin:16px 0;font-size:15px}
.s-article th,.s-article td{border:1px solid #e3e6ea;padding:10px;text-align:left;vertical-align:top}
.s-article th{background:#f4f6f9}
.s-cta{background:linear-gradient(135deg,#0b2f5c,#0252a8);color:#fff;border-radius:10px;padding:28px;margin:36px 0;text-align:center}
.s-cta p{font-size:19px;margin:0 0 18px}
.s-faq details{border:1px solid #e3e6ea;border-radius:6px;padding:12px 16px;margin:8px 0}
.s-faq summary{font-weight:600;cursor:pointer}
.s-pager{display:flex;justify-content:space-between;gap:16px;margin-top:32px;font-size:15px}
.s-side__box{background:#fff;border-radius:10px;padding:22px;box-shadow:0 2px 10px rgba(0,0,0,.06);position:sticky;top:84px}
.s-side__title{font-weight:700;margin:0 0 8px;color:#0b2f5c}
.s-side ol{list-style:none;margin:0;padding:0;font-size:14px}
.s-side li{padding:6px 0;border-bottom:1px solid #f0f1f3}
.s-side li a{text-decoration:none;color:#2b2d33}.s-side li.cur a{color:#e2353b;font-weight:700}
.s-footer{background:#0b2f5c;color:#c8d3e3;padding:28px 0;font-size:14px;text-align:center}
.s-footer a{color:#fff}
@media (max-width:900px){.s-grid{grid-template-columns:1fr}.s-side{order:2}.s-article{padding:24px 20px}.s-hero h1{font-size:32px}.s-article h1{font-size:27px}.s-nav{margin-left:0;width:100%;gap:14px;font-size:14px}.s-header{position:static}.s-header__in{padding:10px 20px;gap:10px 18px}.s-pager{flex-direction:column}}
.s-nav__cta{background:#e2353b;color:#fff!important;padding:8px 16px;border-radius:6px}
.s-practice{background:#fff8e6;border:1px solid #f3dca0;border-radius:10px;padding:8px 24px 18px;margin:32px 0}
.s-practice h2{margin-top:16px}
.s-quiz{margin:32px 0}
.s-q{border:1px solid #e3e6ea;border-radius:8px;padding:14px 18px;margin:12px 0}
.s-q__t{font-weight:600;margin:0 0 10px}
.s-q__o{display:block;width:100%;text-align:left;background:#f4f6f9;border:1px solid #dde1e6;border-radius:6px;padding:10px 14px;margin:6px 0;font:inherit;font-size:16px;cursor:pointer}
.s-q__o:hover{background:#eaf1fb}
.s-q__o.ok{background:#e3f6e8;border-color:#3aa55b}
.s-q__o.bad{background:#fde8e8;border-color:#e2353b}
.s-q__r{margin:6px 0 0;font-size:15px;color:#454a55}
.s-done{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin:24px 0}
.s-done__btn{border:0;cursor:pointer;font-family:inherit}.s-done__btn:disabled{background:#3aa55b;cursor:default}
.s-prog{margin:0 0 12px}.s-prog__bar{height:8px;background:#e3e6ea;border-radius:4px;overflow:hidden}
.s-prog__bar i{display:block;height:100%;width:0;background:#3aa55b;transition:width .3s}
.s-prog__txt{font-size:13px;color:#5b5f69}
.s-prog--index{max-width:520px;margin:32px auto 0;text-align:center}
.s-how{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:28px 0 0}
.s-how div{background:#fff;border-radius:10px;padding:18px;box-shadow:0 2px 10px rgba(0,0,0,.06);display:flex;flex-direction:column}
.s-how span{font-size:15px;color:#5b5f69}
.s-side li.is-done a::after{content:" ✓";color:#3aa55b;font-weight:700}
.s-card.is-done .s-card__n::after{content:" · пройден ✓";color:#3aa55b}
@media (max-width:900px){.s-how{grid-template-columns:1fr}.s-practice{padding:4px 16px 14px}}