/* ============================================================
   Cases2 — второй сайт кейсов cases2.<домен> (layouts/cases2).
   Стиль — тот же «командный центр» (cases.css: токены, шапка, герой,
   карточки, форма); здесь — компоненты другой архитектуры страниц:
   меню-витрина разделов, разделы-полосы с мозаикой, ленты работ подвидов,
   этапы пакета «Ход строительства», группы работ по проектам.
   Всё под .c2 (класс body вместе с .cs).
   ============================================================ */

/* ============ MEGA MENU ============ */
.c2 .c2-mega{position:static;}
.c2 .cs-header__inner{position:relative;}
.c2 .c2-mega__panel{position:absolute;top:calc(100% + 4px);left:0;right:0;padding:28px;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px 36px;}
.c2 .c2-mega__head{display:flex;align-items:baseline;gap:10px;font-size:15px;font-weight:500;color:var(--fg);padding-bottom:12px;margin-bottom:10px;border-bottom:1px solid var(--line);}
.c2 .c2-mega__head .index::before{display:none;}
.c2 .c2-mega__head:hover,.c2 .c2-mega__head[aria-current="page"]{color:var(--accent);}
.c2 .c2-mega__count{margin-left:auto;font-size:11px;color:var(--mute);}
.c2 .c2-mega ul{position:static;min-width:0;padding:0;display:flex;flex-direction:column;gap:2px;background:none;border:0;box-shadow:none;backdrop-filter:none;-webkit-backdrop-filter:none;}
.c2 .c2-mega ul a{display:block;padding:6px 0;font-size:13px;color:var(--dim);border-radius:0;}
.c2 .c2-mega ul a:hover{color:var(--fg);background:none;}
@media(max-width:900px){
  .c2 .c2-mega__panel{position:static;padding:12px 0 0;grid-template-columns:1fr 1fr;gap:20px;background:none;border:0;box-shadow:none;backdrop-filter:none;-webkit-backdrop-filter:none;}
  .c2 .c2-mega ul{display:none;}
  .c2 .c2-mega__head{font-size:14px;margin:0;padding-bottom:8px;}
}

/* ============ HERO TOC (оглавление разделов на главной) ============ */
.c2 .c2-toc{margin:0;padding:0;list-style:none;border-top:1px solid var(--line-dash);}
.c2 .c2-toc a{display:flex;align-items:baseline;gap:12px;padding:10px 0;border-bottom:1px solid var(--line);font-size:14px;transition:color .2s;}
.c2 .c2-toc a > span:first-child{font-size:11px;color:var(--mute);}
.c2 .c2-toc a:hover{color:var(--accent);}
.c2 .c2-toc__count{margin-left:auto;font-size:12px;color:var(--mute);}

/* ============ BAND (раздел на главной) ============ */
.c2 .c2-band{padding:clamp(56px,7vw,104px) 0;border-top:1px solid var(--line);}
.c2 .c2-band__grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:40px;align-items:center;}
.c2 .c2-band__info{grid-column:1 / span 5;display:flex;flex-direction:column;align-items:flex-start;gap:20px;}
.c2 .c2-mosaic{grid-column:6 / span 7;}
.c2 .c2-band--flip .c2-band__info{grid-column:8 / span 5;grid-row:1;}
.c2 .c2-band--flip .c2-mosaic{grid-column:1 / span 7;grid-row:1;}
.c2 .c2-band__title{font-size:clamp(40px,5vw,76px);font-weight:300;letter-spacing:-.035em;}
.c2 .c2-band__title a:hover{color:var(--accent);}
.c2 .c2-band__stats{display:flex;gap:32px;}
.c2 .c2-band__stats > span{display:flex;align-items:baseline;gap:8px;}
.c2 .c2-band__stats .num{font-size:clamp(32px,3vw,44px);font-weight:300;}
.c2 .c2-chips{display:flex;flex-wrap:wrap;gap:6px;margin:0;padding:0;list-style:none;}
.c2 .c2-chips .tag{height:30px;padding:0 12px;font-size:13px;gap:8px;}
.c2 .c2-chips .tag span{font-size:11px;color:var(--mute);}

/* Мозаика: крупный кадр 2×2 и четыре малых; меньше работ — меньше сетка */
.c2 .c2-mosaic{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));grid-auto-rows:clamp(120px,11vw,170px);gap:10px;}
.c2 .c2-mosaic > :first-child{grid-column:span 2;grid-row:span 2;}
.c2 .c2-mosaic[data-tiles="1"]{grid-template-columns:1fr;}
.c2 .c2-mosaic[data-tiles="1"] > :first-child{grid-column:auto;}
.c2 .c2-mosaic[data-tiles="2"] > :nth-child(2),.c2 .c2-mosaic[data-tiles="3"] > :nth-child(3){grid-column:span 2;}
.c2 .c2-mosaic[data-tiles="2"] > :nth-child(2){grid-row:span 2;}
.c2 .c2-tile{position:relative;display:block;border-radius:14px;overflow:hidden;background:var(--s1);isolation:isolate;}
.c2 .c2-tile picture,.c2 .c2-tile img{width:100%;height:100%;}
.c2 .c2-tile img{object-fit:cover;filter:saturate(.85) brightness(.9);transition:transform .8s var(--ease),filter .4s;}
.c2 .c2-tile:hover img{transform:scale(1.04);filter:saturate(1) brightness(1);}
.c2 .c2-tile::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 55%,rgba(13,13,13,.7));pointer-events:none;}
.c2 .c2-tile__caption{position:absolute;left:12px;right:12px;bottom:10px;z-index:1;font-size:12px;color:#d8d8d8;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
@media(max-width:1000px){
  .c2 .c2-band__info,.c2 .c2-mosaic,.c2 .c2-band--flip .c2-band__info,.c2 .c2-band--flip .c2-mosaic{grid-column:1 / -1;grid-row:auto;}
  .c2 .c2-band__grid{gap:28px;}
}
@media(max-width:640px){
  .c2 .c2-mosaic{grid-template-columns:repeat(2,minmax(0,1fr));grid-auto-rows:120px;}
  .c2 .c2-mosaic > :nth-child(n+6){display:none;}
}

/* ============ PACKAGE STEPS ============ */
.c2 .c2-steps{margin:0;padding:0;list-style:none;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border-top:1px solid var(--line-dash);}
.c2 .c2-step{position:relative;padding:24px 24px 28px 0;display:flex;flex-direction:column;gap:14px;}
.c2 .c2-step + .c2-step{padding-left:24px;border-left:1px solid var(--line);}
.c2 .c2-step::before{content:"";position:absolute;top:-3px;left:0;width:5px;height:5px;background:var(--accent);}
.c2 .c2-step + .c2-step::before{left:24px;}
.c2 .c2-step__index{font-size:11px;letter-spacing:.06em;color:var(--mute);}
.c2 .c2-step__title{font-size:clamp(22px,2vw,30px);font-weight:300;}
.c2 .c2-step__title a:hover{color:var(--accent);}
.c2 .c2-step__lead{font-size:14px;color:var(--dim);}
.c2 .c2-step__count{margin-top:auto;display:flex;align-items:baseline;gap:8px;}
.c2 .c2-step__count .num{font-size:36px;}
.c2 .c2-package{border-top:1px solid var(--line);background:radial-gradient(ellipse 60% 50% at 100% 0%,rgba(12,180,206,.06),transparent 70%);}
@media(max-width:900px){
  .c2 .c2-steps{grid-template-columns:repeat(2,minmax(0,1fr));}
  .c2 .c2-step:nth-child(3){padding-left:0;border-left:0;}
  .c2 .c2-step:nth-child(3)::before{left:0;}
  .c2 .c2-step:nth-child(n+3){border-top:1px solid var(--line);}
}
@media(max-width:480px){
  .c2 .c2-steps{grid-template-columns:minmax(0,1fr);}
  .c2 .c2-step + .c2-step{padding-left:0;border-left:0;border-top:1px solid var(--line);}
  .c2 .c2-step + .c2-step::before{left:0;}
}

/* ============ SUBNAV (липкая лента якорей) ============ */
.c2 .c2-subnav{position:sticky;top:68px;z-index:40;background:rgba(13,13,13,.86);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.c2 .c2-subnav ul{display:flex;gap:4px;overflow-x:auto;scrollbar-width:none;padding:10px 0;}
.c2 .c2-subnav ul::-webkit-scrollbar{display:none;}
.c2 .c2-subnav a{flex:0 0 auto;display:inline-flex;align-items:center;gap:8px;height:34px;padding:0 14px;border-radius:999px;font-size:13px;color:var(--dim);white-space:nowrap;transition:color .2s,background .2s;}
.c2 .c2-subnav a:hover{color:var(--fg);background:rgba(255,255,255,.05);}
.c2 .c2-subnav a span{font-size:11px;opacity:.6;}
.c2 [id^="sub-"],.c2 [id^="group-"]{scroll-margin-top:140px;}

/* ============ ROW (подвид на странице раздела) ============ */
.c2 .c2-row + .c2-row{margin-top:clamp(56px,6vw,88px);}
.c2 .c2-row__head{display:grid;grid-template-columns:72px minmax(0,1fr) auto;gap:24px;align-items:end;padding-bottom:20px;margin-bottom:24px;border-bottom:1px solid var(--line);}
.c2 .c2-row__head .index{align-self:start;margin-top:12px;}
.c2 .c2-row__title{font-size:clamp(26px,2.8vw,40px);font-weight:300;}
.c2 .c2-row__title a:hover{color:var(--accent);}
.c2 .c2-row__lead{margin-top:10px;font-size:14px;color:var(--dim);max-width:60ch;}
.c2 .c2-row__all{display:flex;flex-direction:column;align-items:flex-end;gap:6px;}
.c2 .c2-row__all .num{font-size:clamp(32px,3vw,44px);}
.c2 .c2-row__all:hover .label{color:var(--accent);}
@media(max-width:640px){
  .c2 .c2-row__head{grid-template-columns:minmax(0,1fr) auto;row-gap:12px;}
  .c2 .c2-row__head > div{grid-column:1 / -1;grid-row:2;}
  .c2 .c2-row__all{grid-column:2;grid-row:1;}
}

/* Лента работ с прокруткой вбок */
.c2 .c2-rail{display:grid;grid-auto-flow:column;grid-auto-columns:clamp(260px,30%,420px);gap:12px;overflow-x:auto;scroll-snap-type:x proximity;padding-bottom:8px;scrollbar-width:thin;scrollbar-color:var(--s3) transparent;}
.c2 .c2-rail > *{scroll-snap-align:start;}
@media(max-width:640px){.c2 .c2-rail{grid-auto-columns:82%;}}

/* ============ GROUP (работы по проектам) ============ */
.c2 .c2-group{display:grid;grid-template-columns:minmax(0,3fr) minmax(0,9fr);gap:32px;padding:32px 0;border-top:1px solid var(--line);}
.c2 .c2-group__aside{position:sticky;top:96px;align-self:start;display:flex;flex-direction:column;gap:12px;}
.c2 .c2-group__title{font-size:clamp(22px,2.2vw,30px);font-weight:300;}
.c2 .c2-group__title a:hover{color:var(--accent);}
.c2 .c2-group__count{display:flex;align-items:baseline;gap:8px;}
.c2 .c2-group__count .num{font-size:36px;}
.c2 .c2-group__link{font-size:13px;color:var(--dim);}
.c2 .c2-group__link:hover{color:var(--accent);}
@media(max-width:900px){
  .c2 .c2-group{grid-template-columns:minmax(0,1fr);gap:20px;}
  .c2 .c2-group__aside{position:static;}
}

/* Мозаика-«кирпичи»: кадры в своих пропорциях */
.c2 .c2-masonry{columns:3 260px;column-gap:12px;}
.c2 .c2-masonry > .work{break-inside:avoid;margin-bottom:12px !important;}
.c2 .c2-masonry .work__media{aspect-ratio:auto;}
.c2 .c2-masonry .work__media img{height:auto;}
.c2 .c2-masonry .work__media:has(.work__play),.c2 .c2-masonry .work__media[target="_blank"]{aspect-ratio:16/10;}
.c2 .c2-masonry .work__media:has(.work__play) img,.c2 .c2-masonry .work__media[target="_blank"] img{height:100%;}

/* ============ FOOTER ============ */
.c2 .c2-footer{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:36px;}
.c2 .c2-footer__brand{grid-column:1 / span 4;}
.c2 .c2-footer__map{grid-column:5 / -1;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:32px 24px;}
.c2 .c2-footer__head{display:block;color:var(--fg);font-size:13px;letter-spacing:.02em;}
.c2 .c2-footer__head:hover{color:var(--accent);}
.c2 .c2-footer .cs-footer__list{font-size:13px;gap:8px;}
@media(max-width:900px){
  .c2 .c2-footer{grid-template-columns:minmax(0,1fr);}
  .c2 .c2-footer__brand,.c2 .c2-footer__map{grid-column:1 / -1;}
  .c2 .c2-footer__map{grid-template-columns:repeat(2,minmax(0,1fr));}
}