/* =========================================================================
   МС-КОНСТРАКШН — design system
   Warm white minimalism · Unbounded + Onest · monochrome + clay micro-accent
   Deliberately the opposite of «СК Билд» (dark graphite / Cormorant / champagne)
   ========================================================================= */

:root{
  /* palette */
  --bg:#F4F2ED;
  --bg-2:#ECE9E1;
  --paper:#FFFFFF;
  --ink:#1A1510;
  --ink-2:#5A5248;
  --ink-3:#8B8479;
  --muted:#9E978B;
  --line:rgba(26,21,16,.11);
  --line-2:rgba(26,21,16,.20);
  --deep:#15110C;
  --deep-2:#211A13;
  --on-deep:#EDE9E1;
  --on-deep-dim:rgba(237,233,225,.56);
  --clay:#9C5A38;            /* single accent, used sparingly */

  /* type */
  --font-display:'Unbounded',system-ui,-apple-system,sans-serif;
  --font-text:'Onest',system-ui,-apple-system,sans-serif;

  /* layout */
  --container:1340px;
  --gutter:clamp(20px,5vw,72px);
  --section:clamp(76px,11vw,154px);
  --head-h:74px;
  --radius:14px;
  --radius-lg:22px;

  --ease:cubic-bezier(.22,.61,.36,1);
  --ease-out:cubic-bezier(.16,1,.3,1);
}

/* ---------- reset ---------- */
*{margin:0;padding:0;box-sizing:border-box}
*{-webkit-tap-highlight-color:transparent}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--head-h) + 16px);-webkit-text-size-adjust:100%}
body{
  font-family:var(--font-text);background:var(--bg) url('../img/grain.svg');color:var(--ink);
  font-weight:400;line-height:1.65;overflow-x:hidden;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer}
input,textarea,select{font:inherit;color:inherit}
::selection{background:var(--ink);color:var(--bg)}

/* ---------- layout primitives ---------- */
.container{width:100%;max-width:var(--container);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-block:var(--section)}
.section--tight{padding-block:clamp(54px,7vw,96px)}
.divider{height:1px;background:var(--line);border:0}

/* ---------- type utilities ---------- */
.eyebrow{
  font-family:var(--font-text);font-size:11px;font-weight:500;
  letter-spacing:.24em;text-transform:uppercase;color:var(--muted);
  display:inline-flex;align-items:center;gap:10px;
}
.eyebrow::before{content:"";width:24px;height:1px;background:var(--line-2)}
.eyebrow--plain::before{display:none}

.display{
  font-family:var(--font-display);font-weight:200;letter-spacing:-.015em;
  line-height:1.02;color:var(--ink);
}
.h2{
  font-family:var(--font-display);font-weight:200;
  font-size:clamp(28px,4.6vw,60px);line-height:1.04;letter-spacing:-.015em;
}
.lead{font-size:clamp(16px,1.5vw,19px);line-height:1.6;color:var(--ink-2);font-weight:400}
.muted{color:var(--muted)}

/* ---------- buttons & links ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  font-size:13.5px;font-weight:500;letter-spacing:.01em;
  padding:14px 26px;border-radius:100px;border:1px solid transparent;
  transition:background .25s var(--ease),color .25s,border-color .25s,transform .25s var(--ease);
  white-space:nowrap;
}
.btn:active{transform:scale(.97)}
.btn--primary{background:var(--ink);color:var(--bg)}
.btn--primary:hover{background:#000}
.btn--ghost{border-color:var(--line-2);color:var(--ink)}
.btn--ghost:hover{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.btn--light{border-color:rgba(237,233,225,.35);color:var(--on-deep)}
.btn--light:hover{background:var(--on-deep);color:var(--deep)}
.btn--block{display:flex;width:100%}

.link-arrow{
  display:inline-flex;align-items:center;gap:9px;font-size:14px;font-weight:500;
  color:var(--ink);position:relative;
}
.link-arrow svg{transition:transform .3s var(--ease)}
.link-arrow::after{content:"";position:absolute;left:0;bottom:-3px;width:100%;height:1px;
  background:currentColor;transform:scaleX(0);transform-origin:left;transition:transform .35s var(--ease)}
.link-arrow:hover::after{transform:scaleX(1)}
.link-arrow:hover svg{transform:translateX(4px)}

/* =========================================================================
   HEADER
   ========================================================================= */
.site-header{position:fixed;inset:14px 14px auto 14px;z-index:120}
.site-header__inner{
  max-width:var(--container);margin-inline:auto;
  display:flex;align-items:center;gap:24px;
  padding:11px 12px 11px 24px;
  background:rgba(244,242,237,.66);
  -webkit-backdrop-filter:blur(18px) saturate(1.2);backdrop-filter:blur(18px) saturate(1.2);
  border:1px solid rgba(255,255,255,.5);border-radius:18px;
  box-shadow:0 8px 34px rgba(40,30,18,.10);
  transition:background .3s,box-shadow .3s,border-color .3s;
}
.is-scrolled .site-header__inner{background:rgba(244,242,237,.9);box-shadow:0 10px 30px rgba(40,30,18,.14)}

.brand{display:flex;align-items:baseline;gap:9px;color:var(--ink)}
.brand__mark{font-family:var(--font-display);font-weight:500;font-size:18px;letter-spacing:-.02em}
.brand__tag{font-size:9px;letter-spacing:.26em;text-transform:uppercase;color:var(--ink-3)}

.nav{display:flex;align-items:center;gap:28px;margin-left:8px}
.nav__link{font-size:14px;color:var(--ink-2);transition:color .2s;position:relative}
.nav__link:hover,.nav__link[aria-current="page"]{color:var(--ink)}
.nav__link[aria-current="page"]::after{content:"";position:absolute;left:0;right:0;bottom:-7px;height:1px;background:var(--ink)}

.header-actions{margin-left:auto;display:flex;align-items:center;gap:18px}
.header-phone{font-size:14px;font-weight:500;color:var(--ink);white-space:nowrap}
.header-phone:hover{color:var(--clay)}

.burger{display:none;width:42px;height:42px;border:1px solid var(--line-2);border-radius:12px;
  align-items:center;justify-content:center;flex-direction:column;gap:5px}
.burger span{width:17px;height:1.5px;background:var(--ink);transition:.3s var(--ease)}
.is-menu-open .burger span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.is-menu-open .burger span:nth-child(2){opacity:0}
.is-menu-open .burger span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}

/* mobile menu */
.mobile-menu{position:fixed;inset:0;z-index:110;background:var(--bg);
  padding:calc(var(--head-h) + 40px) var(--gutter) 40px;
  display:flex;flex-direction:column;
  opacity:0;visibility:hidden;transform:translateY(-8px);
  transition:opacity .4s var(--ease),transform .4s var(--ease),visibility .4s}
.is-menu-open .mobile-menu{opacity:1;visibility:visible;transform:none}
.mobile-menu__link{font-family:var(--font-display);font-weight:200;font-size:clamp(30px,9vw,46px);
  letter-spacing:-.01em;padding:14px 0;border-bottom:1px solid var(--line)}
.mobile-menu__foot{margin-top:auto;display:flex;flex-direction:column;gap:14px;padding-top:30px}
.mobile-menu__foot a{font-size:16px;color:var(--ink-2)}

/* =========================================================================
   HERO
   ========================================================================= */
.hero{position:relative;min-height:100svh;display:flex;flex-direction:column;justify-content:flex-end;
  overflow:hidden;color:var(--on-deep)}
.hero__media{position:absolute;inset:0;z-index:-2;
  /* swap this for a real render: background-image:url(...) */
  background:
    radial-gradient(120% 80% at 72% 26%,rgba(255,247,235,.5),rgba(255,247,235,0) 52%),
    linear-gradient(176deg,#9A958E 0%,#ABA49B 24%,#B7AEA2 46%,#9C8F80 70%,#6A5F54 100%);
  background-size:cover}
.hero__skyline{position:absolute;left:0;right:0;bottom:30%;width:100%;height:24%;z-index:-1;opacity:.4;
  color:#4E443A}
.hero__scrim{position:absolute;inset:0;z-index:-1;
  background:linear-gradient(0deg,rgba(12,8,4,.85) 0%,rgba(12,8,4,.36) 34%,rgba(12,8,4,0) 62%),linear-gradient(105deg,rgba(12,8,4,.62) 0%,rgba(12,8,4,.16) 40%,rgba(12,8,4,0) 66%)}
.hero__inner{width:100%;max-width:var(--container);margin-inline:auto;padding:0 var(--gutter) clamp(40px,7vw,80px)}
.hero__eyebrow{color:rgba(237,233,225,.82);margin-bottom:24px}
.hero__eyebrow::before{background:rgba(237,233,225,.4)}
.hero__title{font-family:var(--font-display);font-weight:200;
  font-size:clamp(40px,8.4vw,108px);line-height:.98;letter-spacing:-.02em;
  text-shadow:0 2px 40px rgba(15,9,4,.28);max-width:16ch}
.hero__text{margin-top:clamp(22px,3vw,32px);max-width:46ch;font-size:clamp(15px,1.5vw,18px);
  line-height:1.6;color:rgba(237,233,225,.86)}
.hero__actions{margin-top:clamp(28px,3.5vw,40px);display:flex;align-items:center;gap:22px;flex-wrap:wrap}
.hero__foot{border-top:1px solid rgba(237,233,225,.16);margin-top:clamp(34px,5vw,54px);padding-top:18px;
  display:flex;align-items:center;justify-content:space-between;gap:16px}
.hero__index{font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:rgba(237,233,225,.66)}
.hero__index b{font-family:var(--font-display);font-weight:400;color:var(--on-deep)}
.hero__scroll{display:inline-flex;align-items:center;gap:10px;font-size:12px;letter-spacing:.14em;
  text-transform:uppercase;color:rgba(237,233,225,.7)}
.hero__scroll i{width:30px;height:30px;border:1px solid rgba(237,233,225,.4);border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;animation:bob 2.4s var(--ease) infinite}
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(4px)}}

/* =========================================================================
   MANIFESTO
   ========================================================================= */
.manifesto__grid{display:grid;grid-template-columns:minmax(0,.34fr) minmax(0,1fr);gap:clamp(28px,5vw,72px)}
.manifesto__label{font-size:13px;line-height:1.7;color:var(--ink-2)}
.manifesto__label .eyebrow{margin-bottom:18px}
.manifesto__text{font-family:var(--font-display);font-weight:200;
  font-size:clamp(23px,2.9vw,40px);line-height:1.22;letter-spacing:-.01em;color:var(--ink)}
.manifesto__text em{font-style:normal;color:var(--ink-3)}
.manifesto__note{margin-top:clamp(28px,3vw,40px);display:flex;gap:34px;flex-wrap:wrap;
  font-size:14px;color:var(--ink-2)}
.manifesto__note span b{font-family:var(--font-display);font-weight:400;color:var(--ink)}

/* =========================================================================
   SECTION HEAD
   ========================================================================= */
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;
  flex-wrap:wrap;margin-bottom:clamp(40px,5vw,66px)}
.sec-head__l{display:flex;flex-direction:column;gap:18px}
.sec-head__idx{font-size:12px;letter-spacing:.2em;color:var(--muted)}
.sec-head__title{font-family:var(--font-display);font-weight:200;
  font-size:clamp(28px,4.4vw,58px);line-height:1.02;letter-spacing:-.015em}

/* =========================================================================
   OBJECTS
   ========================================================================= */
.objects__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(18px,2vw,28px)}
.object-card{display:flex;flex-direction:column;group:card}
.object-card__media{position:relative;aspect-ratio:4/5;border-radius:var(--radius);overflow:hidden;
  background:linear-gradient(150deg,#CFC8BC,#A89C8C);border:1px solid var(--line)}
.object-card__media::after{content:attr(data-tag);position:absolute;left:14px;bottom:14px;
  font-size:11px;letter-spacing:.04em;color:rgba(255,255,255,.92);
  background:rgba(20,15,10,.34);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
  padding:6px 12px;border-radius:100px}
.object-card__img{width:100%;height:100%;object-fit:cover;transition:transform .7s var(--ease)}
.object-card:hover .object-card__img{transform:scale(1.05)}
.object-card__meta{display:flex;gap:14px;margin-top:18px;font-size:12px;letter-spacing:.04em;
  text-transform:uppercase;color:var(--muted)}
.object-card__meta span{position:relative;padding-right:14px}
.object-card__meta span:not(:last-child)::after{content:"";position:absolute;right:0;top:50%;
  width:4px;height:4px;border-radius:50%;background:var(--line-2);transform:translateY(-50%)}
.object-card__title{font-family:var(--font-display);font-weight:300;font-size:21px;line-height:1.1;
  margin-top:10px;letter-spacing:-.01em}
.object-card__desc{margin-top:8px;font-size:14px;color:var(--ink-2);line-height:1.55}

/* =========================================================================
   COMPETENCIES — editorial index
   ========================================================================= */
.compe__list{border-top:1px solid var(--line)}
.compe-row{display:grid;grid-template-columns:64px minmax(0,.5fr) minmax(0,1fr) auto;
  align-items:center;gap:24px;padding:clamp(22px,2.6vw,34px) 0;border-bottom:1px solid var(--line);
  transition:padding-left .4s var(--ease),background .4s}
.compe-row:hover{padding-left:14px}
.compe-row__num{font-family:var(--font-display);font-weight:300;font-size:14px;color:var(--muted)}
.compe-row__title{font-family:var(--font-display);font-weight:300;
  font-size:clamp(20px,2.4vw,30px);letter-spacing:-.01em;line-height:1.08}
.compe-row__desc{font-size:14.5px;color:var(--ink-2);line-height:1.55}
.compe-row__arrow{width:44px;height:44px;border-radius:50%;border:1px solid var(--line-2);
  display:flex;align-items:center;justify-content:center;color:var(--ink);
  transition:background .3s,color .3s,transform .3s var(--ease)}
.compe-row:hover .compe-row__arrow{background:var(--ink);color:var(--bg);transform:rotate(-45deg)}

/* =========================================================================
   PROCESS
   ========================================================================= */
.process__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);
  border:1px solid var(--line)}
.pstep{background:var(--bg);padding:clamp(26px,2.4vw,38px) clamp(22px,1.8vw,30px);
  display:flex;flex-direction:column;gap:16px;min-height:230px}
.pstep__num{font-family:var(--font-display);font-weight:300;font-size:13px;color:var(--clay);letter-spacing:.1em}
.pstep__title{font-family:var(--font-display);font-weight:300;font-size:21px;line-height:1.1;letter-spacing:-.01em}
.pstep__desc{font-size:14px;color:var(--ink-2);line-height:1.55;margin-top:auto}

/* =========================================================================
   STATS
   ========================================================================= */
.stats{background:var(--bg-2)}
.stats__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(24px,3vw,48px)}
.stat__num{font-family:var(--font-display);font-weight:200;font-size:clamp(40px,6vw,82px);
  line-height:1;letter-spacing:-.02em}
.stat__num small{font-size:.42em;font-weight:300;color:var(--ink-3);margin-left:4px}
.stat__label{margin-top:14px;font-size:13px;color:var(--ink-2);max-width:22ch}

/* =========================================================================
   CTA
   ========================================================================= */
.cta__grid{max-width:780px}
.cta__title{font-family:var(--font-display);font-weight:200;
  font-size:clamp(30px,4.4vw,58px);line-height:1.04;letter-spacing:-.015em}
.cta__text{margin-top:22px;max-width:42ch}
.cta__contacts{margin-top:30px;display:flex;flex-direction:column;gap:6px}
.cta__contacts a{font-family:var(--font-display);font-weight:300;font-size:clamp(20px,2vw,26px)}

.lead-form{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:clamp(24px,3vw,38px)}
.field{margin-bottom:14px}
.field label{display:block;font-size:12px;letter-spacing:.06em;text-transform:uppercase;
  color:var(--muted);margin-bottom:8px}
.field input,.field textarea{width:100%;background:var(--bg);border:1px solid var(--line);
  border-radius:11px;padding:14px 16px;font-size:15px;transition:border-color .25s,background .25s}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--clay);background:var(--paper)}
.field textarea{resize:vertical;min-height:88px}
.field--hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.lead-form__note{margin-top:14px;font-size:12px;color:var(--muted);line-height:1.5}
.lead-form__note a{text-decoration:underline;text-underline-offset:2px}
.form-status{margin-top:12px;font-size:14px;min-height:1em}
.form-status[data-state="ok"]{color:#3B7A4A}
.form-status[data-state="err"]{color:#B4452F}

/* =========================================================================
   FOOTER
   ========================================================================= */
.site-footer{background:var(--deep);color:var(--on-deep)}
.footer__top{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:clamp(40px,5vw,80px);
  padding-block:clamp(56px,7vw,96px) clamp(40px,5vw,64px)}
.footer__brand-mark{font-family:var(--font-display);font-weight:200;
  font-size:clamp(44px,8vw,104px);line-height:.9;letter-spacing:-.02em}
.footer__tagline{margin-top:24px;max-width:36ch;color:var(--on-deep-dim);font-size:15px;line-height:1.6}
.footer__cols{display:grid;grid-template-columns:repeat(2,1fr);gap:clamp(28px,3vw,48px)}
.footer__col h4{font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:var(--on-deep-dim);
  font-weight:500;margin-bottom:16px}
.footer__col ul{list-style:none;display:flex;flex-direction:column;gap:11px}
.footer__col a{color:rgba(237,233,225,.82);font-size:15px;transition:color .2s}
.footer__col a:hover{color:var(--on-deep)}
.footer__bottom{border-top:1px solid rgba(237,233,225,.12);padding-block:26px;
  display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
  font-size:13px;color:var(--on-deep-dim)}
.footer__bottom a{color:var(--on-deep-dim)}
.footer__bottom a:hover{color:var(--on-deep)}

/* =========================================================================
   REVEAL (progressive enhancement)
   ========================================================================= */
.js .reveal{opacity:0;transform:translateY(22px);
  transition:opacity .8s var(--ease-out),transform .8s var(--ease-out)}
.js .reveal.is-visible{opacity:1;transform:none}
.js .reveal[data-d="1"]{transition-delay:.08s}
.js .reveal[data-d="2"]{transition-delay:.16s}
.js .reveal[data-d="3"]{transition-delay:.24s}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition-duration:.01ms!important;scroll-behavior:auto}
  .js .reveal{opacity:1;transform:none}
}

/* =========================================================================
   RESPONSIVE
   ========================================================================= */
@media (max-width:1080px){
  .objects__grid{grid-template-columns:repeat(2,1fr)}
  .process__grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:860px){
  .nav,.header-phone,.header-actions .btn{display:none}
  .burger{display:flex}
  .manifesto__grid{grid-template-columns:1fr;gap:28px}
  .cta__grid{grid-template-columns:1fr}
  .footer__top{grid-template-columns:1fr;gap:40px}
  .stats__grid{grid-template-columns:repeat(2,1fr);gap:34px 24px}
  .compe-row{grid-template-columns:44px 1fr;gap:8px 16px}
  .compe-row__desc{grid-column:2;margin-top:4px}
  .compe-row__arrow{display:none}
}
@media (max-width:560px){
  .objects__grid{grid-template-columns:1fr}
  .process__grid{grid-template-columns:1fr}
  .stats__grid{grid-template-columns:1fr;gap:28px}
  .hero__foot{flex-direction:column;align-items:flex-start;gap:14px}
  .footer__cols{grid-template-columns:1fr}
}