/* ROOF.DSGN — Architectural Green Motion
   Brand DNA borrowed from FloorDSGN (pine, discipline, 28px radius, pill buttons),
   own subject: pergolas / ZIP / glass enclosures. */

:root{
  --pine:#131B16;
  --pine-2:#0E140F;
  --pine-soft:#1B2620;
  --concrete:#F3F0EA;
  --surface:#F5F5F7;
  --aluminum:#8B8E88;
  --glass:#C8D8D5;
  --amber:#E9BF65;
  --amber-deep:#D9A93F;
  --wa:#128C7E;
  --ink:#151515;
  --line:rgba(19,27,22,.12);
  --line-dark:rgba(255,255,255,.16);
  --r:28px;
  --r-sm:18px;
  --pill:980px;
  --wrap:1180px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-body:'Assistant', system-ui, -apple-system, sans-serif;
  --font-head:'Assistant','Montserrat', system-ui, sans-serif;
}
html[lang="ru"]{
  --font-body:'Montserrat', system-ui, -apple-system, sans-serif;
  --font-head:'Montserrat', system-ui, sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-body);
  color:var(--ink);
  background:var(--concrete);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}

.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:clamp(20px,5vw,48px)}
.narrow{max-width:820px}
.center{text-align:center}

/* ---------- typography ---------- */
h1,h2,h3{font-family:var(--font-head);font-weight:300;line-height:1.08;letter-spacing:-.01em;color:var(--ink)}
h1{font-size:clamp(2.3rem,5.6vw,4.6rem)}
h2{font-size:clamp(1.8rem,3.6vw,3rem);margin-bottom:.5em}
h3{font-size:1.25rem;font-weight:600;letter-spacing:0}
.on-dark,.on-dark h2{color:#fff}
.lead{font-size:clamp(1.05rem,1.6vw,1.3rem);max-width:60ch;color:#3a423d;margin-bottom:2.2rem}
.band-pine .lead,.cta-band .lead{color:rgba(255,255,255,.8)}
.note{font-size:.85rem;color:#6c736d;margin-top:1.1rem}
.note-dark{color:rgba(255,255,255,.55)}

.eyebrow{
  display:inline-block;font-family:'Montserrat',sans-serif;font-weight:600;
  font-size:.72rem;letter-spacing:.22em;text-transform:uppercase;
  color:var(--amber-deep);margin-bottom:1rem;
}
.eyebrow-on-dark{color:var(--amber)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  font-family:var(--font-head);font-weight:600;font-size:1rem;
  padding:.92em 1.7em;border-radius:var(--pill);border:1px solid transparent;
  cursor:pointer;transition:transform .25s var(--ease),background .25s,box-shadow .25s,color .25s;
  white-space:nowrap;
}
.btn:hover{transform:translateY(-2px)}
.btn-amber{background:var(--amber);color:var(--pine-2);box-shadow:0 10px 30px -10px rgba(233,191,101,.6)}
.btn-amber:hover{background:#f1cd80}
.btn-pine{background:var(--pine);color:#fff}
.btn-pine:hover{background:var(--pine-soft)}
.btn-wa{background:var(--wa);color:#fff;font-size:.92rem;padding:.7em 1.3em}
.btn-wa:hover{background:#16a394}
.btn-ghost-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}
.btn-ghost-light:hover{background:rgba(255,255,255,.12)}

/* ---------- header ---------- */
.hdr{position:fixed;inset-block-start:0;inset-inline:0;z-index:60;transition:background .3s,box-shadow .3s,backdrop-filter .3s}
.hdr-in{display:flex;align-items:center;justify-content:space-between;height:74px;gap:1.5rem}
.hdr.scrolled{background:rgba(243,240,234,.82);backdrop-filter:saturate(160%) blur(16px);-webkit-backdrop-filter:saturate(160%) blur(16px);box-shadow:0 1px 0 var(--line)}
.logo{display:flex;align-items:center;gap:.62rem;color:#fff;transition:color .3s}
.hdr.scrolled .logo{color:var(--ink)}
.rd-mark{width:30px;height:30px;fill:currentColor;flex:none}
.rd-word{font-family:'Montserrat',sans-serif;font-weight:800;font-size:1.32rem;letter-spacing:-.04em}
.rd-dot{color:var(--amber-deep)}

.nav{display:flex;gap:1.7rem}
.nav a{font-size:.98rem;font-weight:500;color:rgba(255,255,255,.9);position:relative;padding:.2em 0;transition:color .25s}
.hdr.scrolled .nav a{color:#2b322d}
.nav a::after{content:"";position:absolute;inset-block-end:-2px;inset-inline-start:0;width:0;height:2px;background:var(--amber-deep);transition:width .3s var(--ease)}
.nav a:hover::after{width:100%}
.nav a.nav-studio{color:var(--amber);font-weight:600}
.hdr.scrolled .nav a.nav-studio{color:var(--amber-deep)}
.nav a.nav-studio::before{content:"●";font-size:.5em;vertical-align:middle;margin-inline-end:.4em;opacity:.8}

.hdr-act{display:flex;align-items:center;gap:.85rem}
.lang{display:flex;border:1px solid rgba(255,255,255,.4);border-radius:var(--pill);overflow:hidden}
.hdr.scrolled .lang{border-color:var(--line)}
.lang button{background:none;border:none;cursor:pointer;font-family:'Montserrat',sans-serif;font-weight:600;font-size:.78rem;
  padding:.4em .8em;color:rgba(255,255,255,.85)}
.hdr.scrolled .lang button{color:#5b625c}
.lang button.on{background:var(--amber);color:var(--pine-2)}

.burger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:6px}
.burger span{width:24px;height:2px;background:#fff;transition:.3s}
.hdr.scrolled .burger span{background:var(--ink)}

/* ---------- hero ---------- */
.hero{position:relative;min-height:100svh;display:flex;align-items:flex-end;color:#fff;overflow:hidden}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;transform:scale(1.05);animation:heroZoom 18s ease-out forwards}
@keyframes heroZoom{to{transform:scale(1)}}
.hero-scrim{position:absolute;inset:0;background:
  linear-gradient(to top,rgba(10,16,11,.94) 2%,rgba(12,18,13,.55) 34%,rgba(12,18,13,.2) 62%,rgba(12,18,13,.45) 100%)}
.hero-in{position:relative;z-index:2;padding-block:118px clamp(56px,11vh,118px);max-width:760px;
  text-shadow:0 2px 24px rgba(8,12,9,.55)}
.hero h1{color:#fff;font-weight:400;margin-bottom:1rem}
.hero-sub{font-size:clamp(1.08rem,1.8vw,1.35rem);color:rgba(255,255,255,.92);max-width:44ch;margin-bottom:2.2rem;font-weight:400}
.hero-cta{display:flex;flex-wrap:wrap;gap:.9rem}
.eyebrow-on-dark{text-shadow:none}

/* ---------- bands ---------- */
.band{padding-block:clamp(64px,9vw,128px)}
.band-light{background:var(--surface)}
.band-concrete{background:var(--concrete)}
.band-pine{background:var(--pine);color:#fff}
.band-pine .note{color:rgba(255,255,255,.55)}

/* ---------- chips / recommendation ---------- */
.chips{display:flex;flex-wrap:wrap;gap:.7rem;margin-block:2rem 1.6rem}
.chip{
  font-family:var(--font-head);font-weight:500;font-size:1rem;cursor:pointer;
  background:#fff;border:1px solid var(--line);border-radius:var(--pill);
  padding:.7em 1.3em;color:#2b322d;transition:.22s var(--ease)}
.chip:hover{border-color:var(--amber-deep);transform:translateY(-2px)}
.chip.on{background:var(--pine);color:#fff;border-color:var(--pine)}
.rec{display:flex;align-items:flex-start;gap:.9rem;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-sm);padding:1.3rem 1.5rem;max-width:760px;transition:.3s}
.rec.flash{border-color:var(--amber);box-shadow:0 12px 34px -16px rgba(233,191,101,.7)}
.rec-icon{color:var(--amber-deep);font-size:1.5rem;font-weight:800;line-height:1.2}
html[dir="ltr"] .rec-icon{transform:scaleX(-1)}
#rec-text{font-size:1.1rem;color:#2b322d}

/* ---------- grid / cards ---------- */
.grid{display:grid;gap:1.4rem;margin-top:2.6rem}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.card{display:block;background:#fff;border-radius:var(--r);overflow:hidden;box-shadow:0 24px 60px -34px rgba(0,0,0,.4);
  transition:transform .35s var(--ease),box-shadow .35s;color:inherit}
.band-pine .card{background:var(--pine-soft)}
.card:hover{transform:translateY(-6px);box-shadow:0 34px 70px -30px rgba(0,0,0,.55)}
.card-img{height:200px;background-size:cover;background-position:center}
.card-body{padding:1.4rem 1.4rem 1.6rem}
.band-pine .card-body h3{color:#fff}
.card-body p{font-size:.95rem;color:#5b625c;margin-block:.5rem .9rem}
.band-pine .card-body p{color:rgba(255,255,255,.7)}
.best{display:block;font-size:.82rem;font-weight:600;color:var(--amber-deep);
  border-top:1px solid var(--line);padding-top:.8rem}
.band-pine .best{border-color:var(--line-dark);color:var(--amber)}

/* ---------- compare slider ---------- */
.compare{position:relative;height:clamp(320px,52vw,560px);border-radius:var(--r);overflow:hidden;
  margin-top:2.4rem;user-select:none;box-shadow:0 30px 70px -34px rgba(0,0,0,.5)}
.cmp-after,.cmp-before{position:absolute;inset:0;background-size:cover;background-position:center}
.cmp-before{inset-inline-start:0;width:50%;border-inline-end:2px solid var(--amber)}
.cmp-tag{position:absolute;inset-block-end:18px;font-family:'Montserrat',sans-serif;font-weight:600;font-size:.8rem;
  letter-spacing:.04em;color:#fff;background:rgba(14,20,15,.6);backdrop-filter:blur(6px);
  padding:.5em 1em;border-radius:var(--pill)}
.cmp-tag-a{inset-inline-end:18px}
.cmp-tag-b{inset-inline-start:18px}
.cmp-range{position:absolute;inset:0;width:100%;height:100%;opacity:0;cursor:ew-resize;margin:0}
.cmp-handle{position:absolute;inset-block:0;inset-inline-start:50%;width:46px;transform:translateX(-50%);
  display:flex;align-items:center;justify-content:center;pointer-events:none}
.cmp-handle span{width:46px;height:46px;border-radius:50%;background:var(--amber);color:var(--pine-2);
  display:flex;align-items:center;justify-content:center;font-weight:800;letter-spacing:-2px;
  box-shadow:0 6px 20px rgba(0,0,0,.4)}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:1.4rem;margin-block:2.6rem 2.4rem}
.step{background:#fff;border-radius:var(--r);padding:2rem 1.6rem;border:1px solid var(--line)}
.step-n{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:50%;
  background:var(--pine);color:var(--amber);font-family:'Montserrat',sans-serif;font-weight:800;font-size:1.2rem;margin-bottom:1rem}
.step h3{margin-bottom:.4rem}
.step p{color:#5b625c;font-size:.96rem}

/* ---------- gallery ---------- */
.gallery{display:grid;grid-template-columns:repeat(4,1fr);grid-auto-rows:200px;gap:1rem;margin-top:2.6rem}
.gallery figure{position:relative;border-radius:var(--r-sm);overflow:hidden;background-size:cover;background-position:center;
  transition:transform .4s var(--ease)}
.gallery figure:hover{transform:scale(1.02)}
.g-tall{grid-row:span 2}
.gallery figcaption{position:absolute;inset-block-end:0;inset-inline:0;padding:1rem;font-size:.85rem;font-weight:600;color:#fff;
  background:linear-gradient(transparent,rgba(14,20,15,.85))}

/* ---------- timeline ---------- */
.timeline{list-style:none;display:grid;grid-template-columns:repeat(4,1fr);gap:1rem 1.4rem;margin-top:2.6rem;counter-reset:t}
.timeline li{counter-increment:t;position:relative;padding-block:1.2rem;padding-inline-start:3rem;border-top:2px solid var(--line)}
.timeline li::before{content:counter(t,decimal-leading-zero);position:absolute;inset-block-start:1rem;inset-inline-start:0;
  font-family:'Montserrat',sans-serif;font-weight:800;color:var(--amber-deep);font-size:1.1rem}
.timeline li span{font-weight:500;color:#2b322d}

/* ---------- tiers ---------- */
.tier{background:#fff;border-radius:var(--r);padding:2.2rem 1.8rem;border:1px solid var(--line);position:relative}
.tier h3{font-family:'Montserrat',sans-serif;font-weight:700;font-size:1.5rem;margin-bottom:.7rem}
.tier p{color:#5b625c;font-size:.98rem}
.tier-mid{background:var(--pine);color:#fff;transform:translateY(-10px);box-shadow:0 30px 60px -30px rgba(19,27,22,.7)}
.tier-mid h3,.tier-mid p{color:#fff}
.tier-mid p{color:rgba(255,255,255,.78)}
.tier-badge{position:absolute;inset-block-start:-13px;inset-inline-start:1.8rem;background:var(--amber);color:var(--pine-2);
  font-family:'Montserrat',sans-serif;font-weight:700;font-size:.72rem;letter-spacing:.06em;padding:.35em .9em;border-radius:var(--pill)}

/* ---------- faq ---------- */
.faq{margin-top:2.2rem}
.faq details{background:#fff;border:1px solid var(--line);border-radius:var(--r-sm);margin-bottom:.8rem;overflow:hidden}
.faq summary{cursor:pointer;list-style:none;padding:1.2rem 1.4rem;font-family:var(--font-head);font-weight:600;font-size:1.08rem;
  display:flex;justify-content:space-between;align-items:center;gap:1rem}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--amber-deep);font-size:1.4rem;font-weight:300;transition:transform .3s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq p{padding:0 1.4rem 1.3rem;color:#5b625c}

/* ---------- cta band ---------- */
.cta-band{background:linear-gradient(135deg,var(--pine) 0%,var(--pine-2) 100%);padding-block:clamp(70px,9vw,120px);color:#fff;text-align:center}
.cta-band p{max-width:54ch;margin:1rem auto 2.2rem;color:rgba(255,255,255,.82);font-size:1.15rem;font-weight:300}

/* ---------- footer ---------- */
.ftr{background:var(--pine-2);color:rgba(255,255,255,.7);padding-block:3.4rem 1.4rem}
.ftr-in{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:1.6rem;padding-bottom:2rem;border-bottom:1px solid var(--line-dark)}
.ftr-logo{height:34px;margin-bottom:.7rem}
.ftr-brand p{font-size:.9rem}
.ftr-links{display:flex;gap:1.4rem;flex-wrap:wrap}
.ftr-links a{font-size:.95rem}
.ftr-links a:hover{color:var(--amber)}
.ftr-legal{padding-top:1.4rem;font-size:.82rem;color:rgba(255,255,255,.4)}

/* ---------- mobile sticky bar ---------- */
.mbar{position:fixed;inset-block-end:0;inset-inline:0;z-index:70;display:none;
  background:rgba(14,20,15,.92);backdrop-filter:blur(12px);border-top:1px solid var(--line-dark);
  padding:.55rem .6rem calc(.55rem + env(safe-area-inset-bottom))}
.mbar a{flex:1;text-align:center;font-family:var(--font-head);font-weight:600;font-size:.9rem;
  padding:.7em .4em;border-radius:var(--pill);color:#fff}
.mbar-wa{background:var(--wa)}
.mbar-call{background:var(--pine-soft)}
.mbar-photo{background:var(--amber);color:var(--pine-2)}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  .hero-bg{animation:none;transform:none}
  .louver-stage{display:none}
}

/* ---------- responsive ---------- */
@media(max-width:1024px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .gallery{grid-template-columns:repeat(2,1fr)}
  .timeline{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:760px){
  .nav{position:fixed;inset-block-start:74px;inset-inline:0;flex-direction:column;gap:0;
    background:rgba(243,240,234,.97);backdrop-filter:blur(16px);padding:1rem clamp(20px,5vw,48px);
    transform:translateY(-120%);transition:transform .35s var(--ease);box-shadow:0 20px 40px -20px rgba(0,0,0,.3)}
  .nav.open{transform:none}
  .nav a{color:var(--ink);padding:.9em 0;border-bottom:1px solid var(--line)}
  .nav a::after{display:none}
  .burger{display:flex}
  .hdr .btn-wa{display:none}
  .grid-3{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .gallery{grid-template-columns:1fr;grid-auto-rows:220px}
  .g-tall{grid-row:span 1}
  .tier-mid{transform:none}
  .mbar{display:flex;gap:.5rem}
  body{padding-bottom:70px}
  .louver-stage{width:88px}
  .hero-in{padding-block:110px 120px}
}
@media(max-width:420px){
  .grid-4{grid-template-columns:1fr}
  .rd-word{font-size:1.15rem}
}