/* большой.сити — дизайн-система
   Палитра: ночное стекло башен + латунная подсветка окон + бетонно-серая бумага.
   Типографика: Unbounded (дисплей) / Manrope (текст) / IBM Plex Mono (метки, данные). */

:root{
  --night:#171E2E;
  --night-2:#232E4A;
  --ink:#181C27;
  --paper:#F2F3F1;
  --card:#FFFFFF;
  --brass:#B98330;
  --brass-bright:#D9A64E;
  --steel:#66707F;
  --line:#D9DCD6;
  --line-dark:#33405C;
  --maxw:1120px;
  --r:6px;
  --f-disp:'Unbounded',system-ui,sans-serif;
  --f-body:'Manrope','Segoe UI',system-ui,sans-serif;
  --f-mono:'IBM Plex Mono','SF Mono',Consolas,monospace;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}
body{font-family:var(--f-body);font-size:17px;line-height:1.65;color:var(--ink);background:var(--paper)}
img{max-width:100%;display:block}
a{color:inherit}
:focus-visible{outline:2px solid var(--brass);outline-offset:2px}

/* ---------- типографика ---------- */
h1,h2,h3{font-family:var(--f-disp);font-weight:500;line-height:1.18;letter-spacing:-.01em}
h1{font-size:clamp(1.7rem,4.4vw,3rem)}
h2{font-size:clamp(1.3rem,2.6vw,1.9rem)}
h3{font-size:1.08rem;line-height:1.35}
.eyebrow{font-family:var(--f-mono);font-size:.72rem;letter-spacing:.18em;text-transform:uppercase;color:var(--brass);display:flex;align-items:center;gap:.7rem;margin-bottom:1rem}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--brass)}
.lead{font-size:1.12rem;line-height:1.6;color:#39404E}
.mono{font-family:var(--f-mono)}

/* ---------- шапка ---------- */
.top{position:sticky;top:0;z-index:50;background:rgba(23,30,46,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--line-dark)}
.top-in{max-width:var(--maxw);margin:0 auto;padding:0 20px;display:flex;align-items:center;justify-content:space-between;height:60px}
.logo{display:flex;align-items:baseline;gap:2px;text-decoration:none;font-family:var(--f-disp);font-weight:700;font-size:1.02rem;color:#fff}
.logo b{color:var(--brass-bright);font-weight:700}
.logo span{font-family:var(--f-mono);font-size:.62rem;letter-spacing:.22em;color:#8B94A8;margin-left:10px;text-transform:uppercase}
nav.main{display:flex;gap:4px}
nav.main a{font-family:var(--f-mono);font-size:.78rem;letter-spacing:.06em;color:#C3C9D6;text-decoration:none;padding:8px 11px;border-radius:4px}
nav.main a:hover{color:#fff;background:rgba(255,255,255,.06)}
nav.main a[aria-current]{color:var(--brass-bright)}
.burger{display:none;background:none;border:1px solid var(--line-dark);color:#fff;border-radius:4px;padding:7px 10px;font-family:var(--f-mono);font-size:.75rem;cursor:pointer}

/* ---------- герой ---------- */
.hero{position:relative;background:linear-gradient(160deg,var(--night) 30%,var(--night-2) 100%);color:#EDF0F5;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background-image:
  linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
  linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:56px 56px;pointer-events:none}
.hero-in{position:relative;max-width:var(--maxw);margin:0 auto;padding:64px 20px 0}
.hero .eyebrow{color:var(--brass-bright)}
.hero .eyebrow::before{background:var(--brass-bright)}
.hero h1{color:#fff;max-width:17ch}
.hero .lead{color:#B9C1D2;max-width:56ch;margin-top:1.2rem}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:1.8rem}
.skyline{display:block;width:100%;max-width:var(--maxw);margin:2.6rem auto 0;padding:0 20px}
.hero.slim .hero-in{padding-bottom:56px}

/* кнопки */
.btn{display:inline-block;font-family:var(--f-mono);font-size:.82rem;letter-spacing:.05em;text-decoration:none;padding:12px 20px;border-radius:4px;border:1px solid transparent}
.btn-brass{background:var(--brass);color:#141414;border-color:var(--brass)}
.btn-brass:hover{background:var(--brass-bright)}
.btn-ghost{color:#E7EAF1;border-color:#46536F}
.btn-ghost:hover{border-color:#8B94A8}

/* ---------- чертёжный штамп (сигнатурный блок цифр) ---------- */
.stamp{max-width:var(--maxw);margin:-1px auto 0;padding:0 20px}
.stamp-in{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line-dark);background:rgba(13,18,30,.55)}
.stamp-cell{padding:16px 18px 14px;border-left:1px solid var(--line-dark)}
.stamp-cell:first-child{border-left:0}
.stamp-cell .v{font-family:var(--f-disp);font-weight:500;font-size:clamp(1.15rem,2.4vw,1.7rem);color:#fff}
.stamp-cell .v em{font-style:normal;color:var(--brass-bright)}
.stamp-cell .k{font-family:var(--f-mono);font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;color:#828CA1;margin-top:5px}
.hero-bottom{height:56px}

/* ---------- секции ---------- */
.section{max-width:var(--maxw);margin:0 auto;padding:64px 20px 8px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:26px}
.section-head .more{font-family:var(--f-mono);font-size:.78rem;color:var(--brass);text-decoration:none;white-space:nowrap;padding-bottom:4px;border-bottom:1px solid transparent}
.section-head .more:hover{border-color:var(--brass)}
.section p+p{margin-top:1em}
.cols-2{display:grid;grid-template-columns:1fr 1fr;gap:36px}

/* ---------- карточки ---------- */
.grid{display:grid;gap:18px}
.grid.c3{grid-template-columns:repeat(3,1fr)}
.grid.c2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;text-decoration:none;display:flex;flex-direction:column;transition:border-color .15s}
.card:hover{border-color:var(--brass)}
.card .media{aspect-ratio:3/2;background:linear-gradient(150deg,#222B41,#2E3A5C);position:relative;overflow:hidden}
.card .media img{width:100%;height:100%;object-fit:cover}
.card-body{padding:16px 18px 18px;flex:1;display:flex;flex-direction:column;gap:8px}
.card h3{color:var(--ink)}
.card .desc{font-size:.92rem;color:#4A5262;line-height:1.5}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.chip{font-family:var(--f-mono);font-size:.66rem;letter-spacing:.08em;text-transform:uppercase;color:var(--steel);border:1px solid var(--line);border-radius:3px;padding:3px 7px}
.chip.b{color:var(--brass);border-color:#E3CDA4}
.card .foot{margin-top:auto;font-family:var(--f-mono);font-size:.72rem;color:var(--brass);padding-top:6px}

/* ---------- хлебные крошки ---------- */
.crumbs{max-width:var(--maxw);margin:0 auto;padding:18px 20px 0;font-family:var(--f-mono);font-size:.72rem;color:var(--steel)}
.crumbs a{color:var(--steel);text-decoration:none}
.crumbs a:hover{color:var(--brass)}
.crumbs span{color:#9AA2AF;margin:0 6px}

/* ---------- статья / прозa ---------- */
.prose{max-width:760px;margin:0 auto;padding:28px 20px 64px}
.prose h1{margin-bottom:.6em}
.prose .meta{font-family:var(--f-mono);font-size:.74rem;color:var(--steel);margin-bottom:2em;letter-spacing:.06em}
.prose h2{margin:1.7em 0 .6em}
.prose h3{margin:1.4em 0 .5em;font-family:var(--f-body);font-weight:800;font-size:1.05rem}
.prose p+p{margin-top:1em}
.prose ul,.prose ol{margin:1em 0 1em 1.3em}
.prose li{margin:.35em 0}
.prose li::marker{color:var(--brass)}
.prose a{color:var(--brass);text-decoration-color:#E0C89B}
.prose a:hover{color:#8F6620}
.prose blockquote{border-left:3px solid var(--brass);padding:6px 0 6px 18px;color:#454C5A;margin:1.4em 0;font-size:1.03rem}
.prose .note{font-size:.85rem;color:var(--steel);border-top:1px solid var(--line);margin-top:2.6em;padding-top:1em}
.prose img{border-radius:var(--r);border:1px solid var(--line);margin:1.6em 0}

/* ---------- таблицы (чертёжный стиль) ---------- */
.tbl{width:100%;border-collapse:collapse;font-size:.92rem;margin:1.4em 0;background:var(--card)}
.tbl th{font-family:var(--f-mono);font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;color:var(--steel);text-align:left;font-weight:500}
.tbl th,.tbl td{border:1px solid var(--line);padding:10px 12px;vertical-align:top}
.tbl tr:hover td{background:#FAFAF8}
.tbl a{color:var(--brass);text-decoration:none}
.tbl a:hover{text-decoration:underline}

/* спецификация объекта */
.spec{display:grid;grid-template-columns:200px 1fr;border:1px solid var(--line);background:var(--card);margin:1.6em 0}
.spec>div{padding:10px 14px;border-top:1px solid var(--line);font-size:.94rem}
.spec>div:nth-child(-n+2){border-top:0}
.spec .k{font-family:var(--f-mono);font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;color:var(--steel);background:#F7F8F6;display:flex;align-items:center}

/* ---------- FAQ ---------- */
.faq details{border:1px solid var(--line);background:var(--card);border-radius:var(--r);margin:10px 0;padding:0 18px}
.faq summary{cursor:pointer;font-weight:800;padding:14px 0;list-style:none;display:flex;justify-content:space-between;gap:14px}
.faq summary::after{content:"+";font-family:var(--f-mono);color:var(--brass);font-size:1.1rem}
.faq details[open] summary::after{content:"–"}
.faq details>p{padding-bottom:16px;color:#3C4452}

/* ---------- баннер-дисклеймер ---------- */
.disclaim{max-width:var(--maxw);margin:48px auto 0;padding:0 20px}
.disclaim-in{border:1px dashed #C9CDC6;border-radius:var(--r);padding:14px 18px;font-size:.82rem;color:var(--steel);font-family:var(--f-mono);line-height:1.55}

/* ---------- подвал ---------- */
footer{background:var(--night);color:#A9B1C2;margin-top:72px;border-top:3px solid var(--brass)}
.foot-in{max-width:var(--maxw);margin:0 auto;padding:44px 20px 26px;display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:28px}
.foot-in h4{font-family:var(--f-mono);font-size:.68rem;letter-spacing:.16em;text-transform:uppercase;color:#7C86A0;margin-bottom:12px;font-weight:500}
.foot-in a{display:block;color:#C6CCDA;text-decoration:none;font-size:.88rem;padding:3px 0}
.foot-in a:hover{color:var(--brass-bright)}
.foot-brand p{font-size:.85rem;max-width:34ch;margin-top:10px;color:#8B94A8}
.foot-legal{border-top:1px solid var(--line-dark);margin-top:8px}
.foot-legal-in{max-width:var(--maxw);margin:0 auto;padding:16px 20px;font-family:var(--f-mono);font-size:.7rem;color:#6E7891;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}

/* ---------- страница 404 ---------- */
.err{min-height:52vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:60px 20px}
.err .code{font-family:var(--f-disp);font-size:5rem;color:var(--brass)}

/* ---------- адаптив ---------- */
@media(max-width:920px){
  .grid.c3{grid-template-columns:repeat(2,1fr)}
  .stamp-in{grid-template-columns:repeat(2,1fr)}
  .stamp-cell:nth-child(3){border-left:0}
  .stamp-cell{border-top:1px solid var(--line-dark)}
  .stamp-cell:nth-child(-n+2){border-top:0}
  .foot-in{grid-template-columns:1fr 1fr}
  .cols-2{grid-template-columns:1fr}
}
@media(max-width:680px){
  body{font-size:16px}
  nav.main{display:none;position:absolute;top:60px;left:0;right:0;background:var(--night);flex-direction:column;padding:10px 14px 16px;border-bottom:1px solid var(--line-dark)}
  nav.main.open{display:flex}
  .burger{display:block}
  .grid.c3,.grid.c2{grid-template-columns:1fr}
  .spec{grid-template-columns:1fr}
  .spec .k{border-top:1px solid var(--line)}
  .spec>div:nth-child(2){border-top:0}
  .section{padding-top:48px}
}