/* Школа Сеченова — секция «Нейросеть, которая учит вместе с вами» (#ai), 28.09.2026.
   Отдельный файл, подключается после landing-refresh.css. Всё под .lai-section,
   токены — из landing-refresh (--lr-*). Паттерны по мотивам 21st.dev: вертикальный
   переключатель фич (hirael/feature-11), bento-карточки со скриншотом, бейджи-пилюли.
   Контракт: без JS все панели видны списком; скрытие неактивных панелей включает
   landing-ai.js классом .lai-js на #laiShow. */

.lai-section{--lai-ink:var(--lr-ink,#142e2a);--lai-muted:#5c6f60;--lai-green:var(--lr-green,#176454);--lai-accent:var(--lr-accent,#0d9488);--lai-paper:var(--lr-paper,#fffefa);--lai-line:var(--lr-line,#dfe7df);--lai-soft:#eef5ef;--lai-shadow:0 4px 8px -4px #153e2910,0 18px 44px -24px #153e2926;--lai-violet:#9c85c8}
.lai-section *{box-sizing:border-box}
.lai-section .sl-icon{width:1.2em;height:1.2em;flex:none;fill:currentColor;overflow:visible}

/* Шапка секции */
.lai-head{max-width:860px}
.lai-eyebrow{display:inline-flex;align-items:center;gap:9px;padding:7px 14px 7px 10px;border-radius:999px;background:#f3f0fa;border:1px solid #e3dcf2;color:#4f3f7a;font-size:11px;font-weight:800;letter-spacing:1.2px;text-transform:uppercase;margin-bottom:20px}
.lai-eyebrow .sl-icon{width:20px;height:20px;--sl-accent:var(--lai-violet)}
.lai-facts{list-style:none;margin:-10px 0 34px;padding:0;display:flex;flex-wrap:wrap;gap:8px}
.lai-facts li{display:inline-flex;align-items:center;gap:8px;padding:8px 13px;border-radius:999px;background:#fffefa;border:1px solid var(--lai-line);font-size:12px;font-weight:600;color:#3d5446;line-height:1.3}
.lai-facts .sl-icon{width:19px;height:19px;color:#35584a}

/* Блок 1: переключатель */
.lai-show{border:1px solid #e3e9dd;border-radius:28px;background:linear-gradient(180deg,#f6f8f1 0%,#fbfcf7 100%);padding:14px;box-shadow:0 2px 0 #ffffffa0 inset}
.lai-tabs{position:relative;display:flex;gap:6px;padding:4px;border-radius:18px;background:#eef2e8;border:1px solid #e2e8db;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch}
.lai-tabs::-webkit-scrollbar{display:none}
.lai-tab{flex:1 0 auto;display:flex;align-items:center;gap:10px;min-height:52px;padding:8px 14px 8px 9px;border-radius:14px;color:#3d5446;text-decoration:none;transition:background .2s ease,box-shadow .2s ease,color .2s ease;position:relative}
.lai-tab:hover{background:#f8faf4;color:var(--lai-ink)}
.lai-tab[aria-selected=true]{background:#fffefa;color:var(--lai-ink);box-shadow:0 1px 2px #1b381f14,0 6px 16px -10px #1b381f40}
.lai-tab-ic{width:36px;height:36px;border-radius:11px;display:flex;align-items:center;justify-content:center;background:#e4ece0;transition:background .2s}
.lai-tab[aria-selected=true] .lai-tab-ic{background:#dcefe6}
.lai-tab-ic .sl-icon{width:23px;height:23px;color:#2f5443}
.lai-tab-txt{display:flex;flex-direction:column;line-height:1.25;white-space:nowrap}
.lai-tab-txt b{font-size:13px;font-weight:750;letter-spacing:-.2px}
.lai-tab-txt small{font-size:11px;color:#6f8072;font-weight:500;margin-top:2px}
.lai-tab:focus-visible{outline:3px solid #127866;outline-offset:2px}

.lai-panels{position:relative}
.lai-panel{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.08fr);gap:44px;align-items:center;padding:38px 30px 30px}
.lai-panel+.lai-panel{border-top:1px solid #e3e9dd}
.lai-js .lai-panel+.lai-panel{border-top:0}
.lai-js .lai-panel[hidden]{display:none}
.lai-js .lai-panel.is-enter{animation:laiIn .35s ease both}
@keyframes laiIn{from{opacity:.001;transform:translateY(8px)}to{opacity:1;transform:none}}
.lai-panel:focus{outline:none}
.lai-panel h3{font-size:27px;line-height:1.2;letter-spacing:-1px;font-weight:700;margin:0 0 14px;color:var(--lai-ink);text-wrap:balance}
.lai-lead{font-size:14px;line-height:1.8;color:var(--lai-muted);margin:0 0 20px}
.lai-list{list-style:none;margin:0 0 20px;padding:0;display:grid;gap:10px}
.lai-list li{display:flex;gap:10px;align-items:flex-start;font-size:13px;line-height:1.6;color:#2f4638}
.lai-list .sl-icon{width:19px;height:19px;margin-top:1px;color:#2d6a52;--sl-accent:#7fb89c}
.lai-limit{display:flex;gap:10px;align-items:flex-start;margin:0 0 24px;padding:12px 14px;border-radius:14px;background:#fffefa;border:1px dashed #cfdcc8;font-size:12px;line-height:1.65;color:#48604f}
.lai-limit .sl-icon{width:19px;height:19px;margin-top:1px;color:#6b5a2e;--sl-accent:#dca734}
.lai-ctas,.lai-final{display:flex;flex-wrap:wrap;gap:10px}
.lai-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:12px 20px;border-radius:13px;font-size:13px;font-weight:700;text-decoration:none;white-space:nowrap;transition:background .2s,box-shadow .2s,transform .2s}
.lai-btn-primary{background:var(--lai-green);color:#fff;box-shadow:0 3px 0 #104735,0 8px 16px -12px #0a5038}
.lai-btn-primary:hover{background:#124d40;color:#fff}
.lai-btn-ghost{background:#ffffffc0;border:1px solid #ccd9cf;color:var(--lai-ink)}
.lai-btn-ghost:hover{background:#f0f4e8;color:var(--lai-ink)}
.lai-btn-arrow{width:18px;height:18px;--sl-accent:currentColor;transition:transform .2s}
.lai-btn:hover .lai-btn-arrow{transform:translateX(3px)}
.lai-btn:active{transform:translateY(1px)}

/* Медиа: окно браузера, «телефон», пары скриншотов */
.lai-media{margin:0;min-width:0;position:relative}
.lai-media figcaption{margin-top:14px;font-size:11px;line-height:1.5;color:#6f8072;text-align:center}
.lai-shot{display:block;width:100%;height:auto;background:#fff}
.lai-window{border:1px solid #d6dfcf;border-radius:18px;overflow:hidden;background:#fff;box-shadow:0 5px 0 #ffffff8a,0 27px 60px -30px #3d583b66}
.lai-window-bar{display:flex;align-items:center;gap:6px;padding:11px 14px;background:#fcfdf8;border-bottom:1px solid #ebeee5}
.lai-window-bar i{width:7px;height:7px;border-radius:50%;background:#cfd9ca}
.lai-window-bar span{margin-left:8px;font-size:10px;color:#8e998b;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.lai-media-phone{display:flex;flex-direction:column;align-items:center}
.lai-media-phone .lai-shot{width:min(100%,340px);border-radius:26px;border:1px solid #d6dfcf;box-shadow:0 5px 0 #ffffff8a,0 30px 70px -30px #3d583b77}
.lai-media-duo{padding-bottom:0}
.lai-duo-main .lai-shot{border-radius:22px}
.lai-media-duo:not(.lai-media-duo--wide) .lai-duo-main{width:min(100%,320px);margin-left:auto;margin-right:8%}
.lai-media-duo:not(.lai-media-duo--wide) .lai-duo-main .lai-shot{border:1px solid #d6dfcf;box-shadow:0 30px 70px -30px #3d583b77}
.lai-duo-float{position:absolute;left:0;bottom:64px;width:62%;transform:rotate(-2deg)}
.lai-duo-float .lai-shot{border-radius:16px;border:1px solid #cfe4de;box-shadow:0 22px 48px -22px #1f4a3a66}
.lai-media-duo--wide .lai-duo-main .lai-shot-crop{max-height:460px;object-fit:cover;object-position:top}
.lai-media-duo--wide .lai-duo-float{left:auto;right:-14px;bottom:36px;width:60%;transform:rotate(1.5deg)}

/* Блок 2: bento */
.lai-more-head{margin:64px 0 22px;max-width:720px}
.lai-more-head h3{font-size:24px;letter-spacing:-.8px;line-height:1.25;margin:0 0 8px;color:var(--lai-ink)}
.lai-more-head p{font-size:13px;line-height:1.7;color:var(--lai-muted);margin:0}
.lai-bento{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:16px}
.lai-card{position:relative;display:flex;flex-direction:column;border:1px solid #e0e6db;border-radius:22px;background:#fffefa;overflow:hidden;min-width:0;transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease}
.lai-card:hover{transform:translateY(-3px);border-color:#baceb0;box-shadow:var(--lai-shadow)}
.lai-card-body{padding:24px 24px 18px;display:flex;flex-direction:column;gap:10px;flex:1}
.lai-card-top{display:flex;align-items:center;justify-content:space-between;gap:10px}
.lai-card-ic{width:44px;height:44px;border-radius:14px;display:flex;align-items:center;justify-content:center;background:#ffffffb0;border:1px solid #e3e9dd}
.lai-card-ic .sl-icon{width:27px;height:27px;color:#2f5443}
.lai-pill{display:inline-flex;align-items:center;padding:5px 11px;border-radius:999px;font-size:10px;font-weight:800;letter-spacing:.4px;background:#eef2e8;color:#3d5446;border:1px solid #dfe6d8;white-space:nowrap}
.lai-pill--warm{background:#fdf1e3;color:#8a5317;border-color:#f3dcc0}
.lai-pill--green{background:#e3f3ea;color:#1f6a4b;border-color:#cbe6d7}
.lai-card h4{font-size:18px;line-height:1.3;letter-spacing:-.5px;margin:4px 0 0;color:var(--lai-ink);font-weight:750}
.lai-card p{font-size:12px;line-height:1.8;color:#596d54;margin:0}
.lai-card-link{margin-top:auto;padding-top:6px;display:inline-flex;align-items:center;gap:7px;min-height:44px;font-size:12px;font-weight:750;color:var(--lai-green);text-decoration:none;align-self:flex-start}
.lai-card-link .sl-icon{width:17px;height:17px;--sl-accent:currentColor;transition:transform .2s}
.lai-card:hover .lai-card-link .sl-icon{transform:translateX(3px)}
.lai-card-shot{padding:0 18px;margin-top:2px}
.lai-card-shot .lai-shot{border-radius:14px 14px 0 0;border:1px solid #dfe6d8;border-bottom:0;box-shadow:0 -10px 30px -22px #1f4a3a55;max-height:230px;object-fit:cover;object-position:top}
.lai-card--autopilot{grid-column:span 4;background:#eef2f8}
.lai-card--examdoc{grid-column:span 2;background:#fcf4e7}
.lai-card--cr{grid-column:span 4;background:#eef5f3}
.lai-card--research{grid-column:span 2;background:#f4f1f8}
.lai-card--connect{grid-column:span 6;flex-direction:row;background:#f0f5e8}
.lai-card--connect .lai-card-body{flex:1 1 44%;padding:28px}
.lai-card--connect .lai-card-shot{flex:1 1 56%;padding:24px 24px 0 0;align-self:flex-end}
.lai-card--autopilot .lai-card-shot .lai-shot{border-color:#2a3456}

/* Блок 3: лимиты */
.lai-limits{margin-top:64px;border:1px solid #e3e9dd;border-radius:26px;background:#fffefa;padding:30px}
.lai-limits-head{max-width:720px;margin-bottom:22px}
.lai-limits-head h3{font-size:24px;letter-spacing:-.8px;margin:0 0 8px;color:var(--lai-ink)}
.lai-limits-head p{font-size:13px;line-height:1.7;color:var(--lai-muted);margin:0}
.lai-limits-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.lai-tier{border:1px solid #e3e9dd;border-radius:18px;padding:20px 20px 16px;background:#f8f9f3}
.lai-tier.is-mid{background:#f0f5e8}
.lai-tier.is-top{background:#f3f7ec;border-color:#99b57c;box-shadow:0 0 0 1px #99b57c}
.lai-tier h4{font-size:15px;margin:0 0 12px;color:var(--lai-ink);letter-spacing:-.3px}
.lai-tier ul{list-style:none;margin:0;padding:0;display:grid;gap:9px}
.lai-tier li{display:flex;gap:9px;align-items:flex-start;font-size:12px;line-height:1.6;color:#3f5446}
.lai-tier .sl-icon{width:17px;height:17px;margin-top:2px;color:#2d6a52;--sl-accent:#7fb89c}
.lai-limits-note{display:flex;gap:10px;align-items:flex-start;margin:16px 0 0;font-size:12px;line-height:1.7;color:#5f7054}
.lai-limits-note .sl-icon{width:18px;height:18px;margin-top:2px;color:#4c7862}
.lai-final{margin-top:28px}
.lai-disclaimer{margin:16px 0 0;font-size:11px;line-height:1.7;color:#6c7a66;max-width:760px}

/* Ссылка на секцию из «Что внутри платформы» */
.lai-jump{display:inline-flex;align-items:center;gap:8px;margin:-18px 0 26px;padding:8px 14px 8px 10px;border-radius:999px;background:#f3f0fa;border:1px solid #e3dcf2;color:#4f3f7a;font-size:12px;font-weight:700;text-decoration:none;min-height:40px}
.lai-jump .sl-icon{width:19px;height:19px;--sl-accent:var(--lai-violet,#9c85c8)}
.lai-jump .lai-jump-arrow{width:16px;height:16px;--sl-accent:currentColor;transition:transform .2s}
.lai-jump:hover{background:#ece6f8;color:#3e3066}
.lai-jump:hover .lai-jump-arrow{transform:translateY(2px)}

/* Пункт «Нейросеть» в шапке: на 800–1000px шапке не хватает ширины (бургер там ещё не включён) */
@media(max-width:1000px){.landing-refresh .top-bar .nav-link[href="#ai"]{display:none}}

/* Адаптив */
@media(max-width:1100px){
  .lai-panel{gap:30px;padding:32px 20px 24px}
  .lai-panel h3{font-size:24px}
}
@media(max-width:900px){
  .lai-panel{grid-template-columns:1fr;gap:28px}
  .lai-media{max-width:560px;width:100%;margin:0 auto}
  .lai-bento{grid-template-columns:repeat(2,minmax(0,1fr))}
  .lai-card--autopilot,.lai-card--cr,.lai-card--connect{grid-column:span 2}
  .lai-card--examdoc,.lai-card--research{grid-column:span 1}
  .lai-limits-grid{grid-template-columns:1fr}
}
@media(max-width:640px){
  .lai-show{padding:8px;border-radius:22px}
  .lai-tab{padding:7px 12px 7px 7px;min-height:48px}
  .lai-tab-ic{width:32px;height:32px}
  .lai-tab-txt small{display:none}
  .lai-panel{padding:24px 10px 18px}
  .lai-panel h3{font-size:21px;letter-spacing:-.6px}
  .lai-lead{font-size:13px}
  .lai-duo-float{position:relative;left:auto;right:auto;bottom:auto;width:100%;transform:none;margin-top:-40px}
  .lai-media-duo--wide .lai-duo-float{width:100%;right:auto;margin-top:12px;transform:none}
  .lai-media-duo:not(.lai-media-duo--wide) .lai-duo-main{margin:0 auto;width:min(100%,300px)}
  .lai-media-duo:not(.lai-media-duo--wide) .lai-duo-float{width:94%;margin:-50px auto 0}
  .lai-media-duo--wide .lai-duo-main .lai-shot-crop{max-height:380px}
  .lai-bento{grid-template-columns:1fr;gap:12px}
  .lai-card--autopilot,.lai-card--cr,.lai-card--connect,.lai-card--examdoc,.lai-card--research{grid-column:auto}
  .lai-card--connect{flex-direction:column}
  .lai-card--connect .lai-card-body{padding:22px 20px 16px}
  .lai-card--connect .lai-card-shot{padding:0 16px;align-self:stretch}
  .lai-card-body{padding:22px 20px 14px}
  .lai-card-shot{padding:0 14px}
  .lai-more-head,.lai-limits{margin-top:48px}
  .lai-more-head h3,.lai-limits-head h3{font-size:21px}
  .lai-limits{padding:20px 16px;border-radius:22px}
  .lai-ctas .lai-btn,.lai-final .lai-btn{flex:1 1 100%}
  .lai-facts li{font-size:11px;padding:7px 11px}
}
@media(prefers-reduced-motion:reduce){
  .lai-section *,.lai-section *::before,.lai-section *::after{animation:none!important;transition:none!important}
}