/* =========================================================================
   SVA-climate — design tokens
   Направление: инженерно-чертёжная эстетика (blueprint / spec-sheet).
   Плашка компании работает в диапазоне +40°C … −25°C — это стало
   центральным визуальным мотивом (шкала-градусник в hero).
   ========================================================================= */

:root{
  /* цвет */
  --ink:        #0E2233;   /* глубокий сине-графитовый — тёмные секции, текст */
  --ink-2:      #16324A;
  --paper:      #F3F6F7;   /* холодный бумажный фон */
  --paper-2:    #E9EEF0;
  --steel:      #56707F;   /* вторичный текст */
  --line:       #C7D6DC;   /* волосяные линии сетки */
  --line-dark:  rgba(243,246,247,.16);
  --air:        #1E9FCE;   /* холодный акцент — вентиляция/охлаждение */
  --air-2:      #22A6D9;
  --heat:       #EF5B27;   /* тёплый акцент — нагрев/CTA */
  --heat-2:     #F0713F;
  --white:      #FFFFFF;

  --font-display: 'Archivo Expanded', 'Archivo', sans-serif;
  --font-body:    'Inter', sans-serif;
  --font-mono:    'IBM Plex Mono', monospace;

  --container: 1200px;
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  font-family:var(--font-body);
  color:var(--ink);
  background:var(--paper);
  font-size:16px;
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
ul{ list-style:none; margin:0; padding:0; }
button{ font-family:inherit; }
h1,h2,h3,h4{ font-family:var(--font-display); margin:0; line-height:1.08; letter-spacing:-.01em; }

.container{ max-width:var(--container); margin:0 auto; padding:0 24px; }

.eyebrow{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--air);
  display:flex; align-items:center; gap:10px;
  margin:0 0 14px;
}
.eyebrow::before{
  content:"";
  width:22px; height:1px; background:var(--heat);
  display:inline-block;
}
.section-title{ font-size:clamp(28px,3.4vw,42px); font-weight:800; }
.section-lede{ color:var(--steel); font-size:17px; max-width:640px; margin-top:14px; }

/* visible focus ring everywhere */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible{
  outline:2px solid var(--heat);
  outline-offset:3px;
}

@media (prefers-reduced-motion: reduce){
  *{ animation-duration:.001ms !important; animation-iteration-count:1 !important; transition-duration:.001ms !important; scroll-behavior:auto !important; }
}

/* =========================================================================
   Buttons — chamfered corners (clip-path) instead of rounded/sharp default
   ========================================================================= */
.btn{
  --clip:10px;
  display:inline-flex; align-items:center; justify-content:center; gap:10px;
  padding:14px 26px;
  font-family:var(--font-body); font-weight:600; font-size:15px;
  border:1px solid transparent;
  clip-path:polygon(var(--clip) 0,100% 0,100% calc(100% - var(--clip)),calc(100% - var(--clip)) 100%,0 100%,0 var(--clip));
  cursor:pointer;
  transition:transform .15s ease, background-color .15s ease, color .15s ease;
  white-space:nowrap;
}
.btn:active{ transform:translateY(1px); }
.btn-heat{ background:var(--heat); color:var(--white); }
.btn-heat:hover{ background:var(--heat-2); }
.btn-outline{ background:transparent; color:var(--white); border-color:var(--line-dark); }
.btn-outline:hover{ border-color:var(--air-2); color:var(--air-2); }
.btn-ink{ background:var(--ink); color:var(--white); }
.btn-ink:hover{ background:var(--ink-2); }
.btn-block{ width:100%; }

/* =========================================================================
   Header
   ========================================================================= */
.site-header{
  position:sticky; top:0; z-index:100;
  background:rgba(14,34,51,.92);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line-dark);
}
.topbar{
  display:flex; align-items:center; justify-content:space-between;
  gap:24px; padding:10px 0;
  font-family:var(--font-mono); font-size:12.5px; color:#9FB4C1;
  border-bottom:1px solid var(--line-dark);
}
.topbar a{ color:#9FB4C1; }
.topbar a:hover{ color:var(--air-2); }
.topbar-contacts{ display:flex; gap:24px; flex-wrap:wrap; }
.topbar-hours{ opacity:.8; }
@media (max-width:860px){ .topbar-hours{ display:none; } }

.navbar{ display:flex; align-items:center; justify-content:space-between; padding:12px 0; gap:16px; }
.brand{ display:flex; align-items:center; gap:12px; color:var(--white); flex-shrink:0; }
.brand-mark{
  width:40px; height:40px; border:1px solid var(--air-2);
  display:flex; align-items:center; justify-content:center;
  font-family:var(--font-mono); font-weight:700; font-size:13px; color:var(--air-2);
  clip-path:polygon(6px 0,100% 0,100% calc(100% - 6px),calc(100% - 6px) 100%,0 100%,0 6px);
}
.brand-name{ font-family:var(--font-display); font-weight:800; font-size:18px; letter-spacing:.01em; white-space:nowrap; }
.brand-name span{ color:var(--air-2); }

.nav-links{ display:flex; align-items:center; gap:2px; flex:1; justify-content:center; min-width:0; }
.nav-links > li{ position:relative; flex-shrink:0; }
.nav-links > li > a, .nav-links > li > button{
  background:none; border:none; color:#D7E4EA; font-size:14px; font-weight:500;
  padding:8px 11px; display:inline-flex; align-items:center; gap:6px; cursor:pointer;
  white-space:nowrap; line-height:1.2;
}
.nav-links > li > a:hover, .nav-links > li > button:hover{ color:var(--air-2); }
.nav-links .caret{
  width:7px; height:7px; flex-shrink:0;
  border-right:1.5px solid currentColor; border-bottom:1.5px solid currentColor;
  transform:rotate(45deg) translateY(-1px);
}

.dropdown{
  position:absolute; top:100%; left:0; min-width:280px;
  background:var(--ink-2); border:1px solid var(--line-dark);
  padding:10px; opacity:0; visibility:hidden; transform:translateY(6px);
  transition:opacity .15s ease, transform .15s ease, visibility .15s;
}
.nav-links > li:hover .dropdown,
.nav-links > li:focus-within .dropdown{ opacity:1; visibility:visible; transform:translateY(0); }
.dropdown a{ display:block; padding:9px 12px; color:#D7E4EA; font-size:14px; white-space:normal; }
.dropdown a:hover{ background:rgba(255,255,255,.06); color:var(--air-2); }

.nav-cta{ display:flex; align-items:center; gap:12px; flex-shrink:0; }
.nav-phone{ color:var(--white); font-family:var(--font-mono); font-size:14px; font-weight:600; white-space:nowrap; }
.nav-phone:hover{ color:var(--air-2); }
.nav-cta .btn{ padding:11px 20px; font-size:14px; }

.burger{ display:none; background:none; border:1px solid var(--line-dark); width:42px; height:42px; color:var(--white); }
@media (max-width:1100px){
  .nav-phone{ display:none; }
}
@media (max-width:980px){
  .nav-links{ display:none; }
  .burger{ display:flex; align-items:center; justify-content:center; }
}

.mobile-menu{
  display:none; flex-direction:column; gap:2px; padding:12px 0 18px; border-top:1px solid var(--line-dark);
}
.mobile-menu.is-open{ display:flex; }
.mobile-menu a{ color:#D7E4EA; padding:11px 4px; font-size:15px; border-bottom:1px solid var(--line-dark); }
.mobile-menu .mm-group-label{ font-family:var(--font-mono); font-size:11px; letter-spacing:.1em; color:var(--air-2); padding:14px 4px 4px; text-transform:uppercase; }

/* =========================================================================
   Hero — blueprint duct diagram + temperature gauge (signature element)
   ========================================================================= */
.hero{
  position:relative;
  background:var(--ink);
  color:var(--white);
  overflow:hidden;
  padding:72px 0 56px;
  background-image:
    linear-gradient(var(--line-dark) 1px,transparent 1px),
    linear-gradient(90deg,var(--line-dark) 1px,transparent 1px);
  background-size:40px 40px;
}
.hero::after{
  content:"";
  position:absolute; inset:0;
  background:radial-gradient(ellipse 70% 60% at 78% 30%, rgba(30,159,206,.20), transparent 70%);
  pointer-events:none;
}
.hero-grid{
  position:relative; z-index:1;
  display:grid; grid-template-columns:1.15fr .85fr; gap:48px; align-items:center;
}
@media (max-width:960px){ .hero-grid{ grid-template-columns:1fr; } }

.hero-title{ font-size:clamp(30px,4.4vw,50px); font-weight:800; margin-bottom:18px; }
.hero-title em{ font-style:normal; color:var(--air-2); }
.hero-text{ color:#B9CBD5; font-size:17px; max-width:520px; margin-bottom:28px; }
.hero-actions{ display:flex; gap:14px; flex-wrap:wrap; margin-bottom:34px; }

.hero-stats{ display:flex; gap:32px; flex-wrap:wrap; }
.hero-stat b{ display:block; font-family:var(--font-display); font-size:26px; color:var(--air-2); }
.hero-stat span{ font-size:12.5px; color:#8FA6B3; font-family:var(--font-mono); text-transform:uppercase; letter-spacing:.06em; }

.hero-visual{ position:relative; }
.gauge-wrap{
  border:1px solid var(--line-dark);
  padding:22px 22px 18px;
  background:rgba(255,255,255,.03);
}
.gauge-head{ display:flex; justify-content:space-between; align-items:baseline; margin-bottom:6px; }
.gauge-head .label{ font-family:var(--font-mono); font-size:11px; letter-spacing:.1em; color:#8FA6B3; text-transform:uppercase; }
.gauge-head .value{ font-family:var(--font-mono); font-size:13px; color:var(--heat-2); }

.duct-svg{ width:100%; height:auto; display:block; }
.duct-line{
  fill:none; stroke:var(--air-2); stroke-width:2; stroke-dasharray:6 5;
  animation:flow 2.4s linear infinite;
}
.duct-line.hot{ stroke:var(--heat-2); }
@keyframes flow{ to{ stroke-dashoffset:-44; } }

.gauge-caption{ font-family:var(--font-mono); font-size:11.5px; color:#8FA6B3; margin-top:10px; display:flex; justify-content:space-between; }
.gauge-caption b{ color:var(--white); }

/* =========================================================================
   Marquee / geography strip
   ========================================================================= */
.geo-strip{
  background:var(--paper-2); border-bottom:1px solid var(--line); border-top:1px solid var(--line);
  padding:14px 0; overflow:hidden;
}
.geo-strip .container{ display:flex; align-items:center; gap:14px; flex-wrap:wrap; justify-content:center; }
.geo-strip .tag{ font-family:var(--font-mono); font-size:12.5px; color:var(--steel); display:flex; align-items:center; gap:8px; }
.geo-strip .tag::before{ content:"◆"; color:var(--heat); font-size:9px; }

/* =========================================================================
   Generic section spacing
   ========================================================================= */
.section{ padding:76px 0; }
.section-dark{ background:var(--ink); color:var(--white); }
.section-alt{ background:var(--paper-2); }
.section-head{ margin-bottom:44px; }
.section-head.center{ text-align:center; }
.section-head.center .section-lede{ margin-left:auto; margin-right:auto; }
.section-head.center .eyebrow{ justify-content:center; }
.section-head.center .eyebrow::before{ display:none; }

/* =========================================================================
   Feature / equipment cards — drafting corner marks
   ========================================================================= */
.card-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:1px; background:var(--line); border:1px solid var(--line); }
.card-grid--3{ grid-template-columns:repeat(3,1fr); }
.section-dark .card-grid{ background:var(--line-dark); border-color:var(--line-dark); }
@media (max-width:960px){ .card-grid,.card-grid--3{ grid-template-columns:repeat(2,1fr); } }
@media (max-width:600px){ .card-grid,.card-grid--3{ grid-template-columns:1fr; } }

.corner-card{
  position:relative; background:var(--paper); padding:32px 26px; transition:background-color .2s ease;
}
.section-dark .corner-card{ background:var(--ink); }
.corner-card:hover{ background:var(--white); }
.section-dark .corner-card:hover{ background:var(--ink-2); }
.corner-card::before,.corner-card::after{
  content:""; position:absolute; width:10px; height:10px; border:1.5px solid var(--heat); opacity:0; transition:opacity .2s ease;
}
.corner-card::before{ top:8px; left:8px; border-right:none; border-bottom:none; }
.corner-card::after{ bottom:8px; right:8px; border-left:none; border-top:none; }
.corner-card:hover::before,.corner-card:hover::after{ opacity:1; }

.corner-card .icon{ width:40px; height:40px; margin-bottom:18px; }
.corner-card .icon img{ width:100%; height:100%; object-fit:contain; }
.corner-card h3{ font-size:19px; margin-bottom:10px; }
.corner-card h3 a{ color:inherit; }
.corner-card h3 a:hover{ color:var(--air); }
.corner-card p{ color:var(--steel); font-size:14.5px; margin:0 0 16px; }
.section-dark .corner-card p{ color:#9FB4C1; }
.corner-card .more{ font-family:var(--font-mono); font-size:12.5px; color:var(--air); text-transform:uppercase; letter-spacing:.06em; }
.corner-card .more::after{ content:" →"; }

/* =========================================================================
   Two-column content + form band
   ========================================================================= */
.split{ display:grid; grid-template-columns:1.2fr .8fr; gap:56px; align-items:start; }
@media (max-width:900px){ .split{ grid-template-columns:1fr; } }
.prose p{ color:var(--steel); font-size:16px; margin:0 0 16px; }
.prose strong{ color:var(--ink); }

.form-panel{
  background:var(--ink); color:var(--white); padding:34px 30px; border-top:3px solid var(--heat);
}
.form-panel h3{ font-size:21px; margin-bottom:6px; }
.form-panel .sub{ color:#9FB4C1; font-size:14px; margin-bottom:22px; }
.field{ margin-bottom:14px; }
.field label{ display:block; font-family:var(--font-mono); font-size:11.5px; letter-spacing:.08em; text-transform:uppercase; color:#8FA6B3; margin-bottom:6px; }
.field input, .field textarea{
  width:100%; background:rgba(255,255,255,.05); border:1px solid var(--line-dark); color:var(--white);
  padding:12px 14px; font-family:var(--font-body); font-size:15px;
}
.field input:focus, .field textarea:focus{ border-color:var(--air-2); outline:none; }
.form-note{ font-size:12px; color:#7D96A3; margin-top:14px; line-height:1.5; }
.form-note a{ color:var(--air-2); text-decoration:underline; }
.form-alert{ padding:12px 14px; margin-bottom:16px; font-size:14px; font-family:var(--font-mono); }
.form-alert.ok{ background:rgba(30,159,206,.15); border:1px solid var(--air); color:#BEE7F5; }
.form-alert.err{ background:rgba(239,91,39,.12); border:1px solid var(--heat); color:#FBD2C2; }

/* =========================================================================
   Why-us list — spec-sheet rows
   ========================================================================= */
.spec-list{ border-top:1px solid var(--line); }
.spec-row{ display:grid; grid-template-columns:220px 1fr; gap:24px; padding:22px 0; border-bottom:1px solid var(--line); }
@media (max-width:700px){ .spec-row{ grid-template-columns:1fr; gap:6px; } }
.spec-row .name{ font-family:var(--font-mono); font-size:13px; letter-spacing:.06em; text-transform:uppercase; color:var(--heat); display:flex; align-items:center; gap:10px; }
.spec-row .name img{ width:20px; height:20px; }
.spec-row p{ margin:0; color:var(--steel); font-size:15px; }

/* =========================================================================
   Buildings grid
   ========================================================================= */
.tag-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:12px; }
@media (max-width:700px){ .tag-grid{ grid-template-columns:1fr 1fr; } }
.tag-item{
  border:1px solid var(--line-dark); padding:16px 16px; font-size:14.5px; color:#D7E4EA;
  display:flex; align-items:center; gap:10px;
}
.tag-item::before{ content:"›"; color:var(--air-2); font-family:var(--font-mono); }

/* =========================================================================
   Footer
   ========================================================================= */
.site-footer{ background:var(--ink); color:#B9CBD5; border-top:1px solid var(--line-dark); padding:56px 0 24px; }
.footer-grid{ display:grid; grid-template-columns:1.4fr 1fr 1fr 1fr; gap:36px; margin-bottom:40px; }
@media (max-width:900px){ .footer-grid{ grid-template-columns:1fr 1fr; } }
@media (max-width:560px){ .footer-grid{ grid-template-columns:1fr; } }
.footer-grid h4{ font-family:var(--font-mono); font-size:12px; letter-spacing:.1em; text-transform:uppercase; color:var(--air-2); margin-bottom:16px; }
.footer-grid a{ display:block; padding:6px 0; font-size:14px; color:#B9CBD5; }
.footer-grid a:hover{ color:var(--white); }
.footer-brand p{ font-size:14px; color:#8FA6B3; max-width:280px; }
.footer-legal{ border-top:1px solid var(--line-dark); padding-top:20px; display:flex; justify-content:space-between; flex-wrap:wrap; gap:12px; font-size:12.5px; font-family:var(--font-mono); color:#728B98; }

/* =========================================================================
   Utility
   ========================================================================= */
.text-center{ text-align:center; }
.mt-0{ margin-top:0; }
.sr-only{ position:absolute; width:1px; height:1px; overflow:hidden; clip:rect(0 0 0 0); }