/*
Theme Name: Ventilation One Ultra
Theme URI: https://ventilation1.ru
Author: Codex
Description: SEO-focused WordPress theme for ventilation, HVAC and air exchange sites.
Version: 1.4.0
Text Domain: ventilation1
*/
:root{--bg:#eef6fb;--surface:#ffffff;--surface2:#e3f2fd;--text:#11324d;--muted:#5b7387;--accent:#0284c7;--accent2:#10b981;--border:#cfe3ee;--hero1:#0f4c81;--hero2:#38bdf8;--font:'IBM Plex Sans', system-ui, sans-serif;--radius:22px;--shadow:0 16px 38px rgba(15,23,42,.10)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font:16px/1.65 var(--font);color:var(--text);background:linear-gradient(180deg,var(--bg),#fff 220px)}a{color:inherit;text-decoration:none}img{max-width:100%;height:auto;display:block}
.container{width:min(1240px,calc(100% - 28px));margin:0 auto}.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.86);backdrop-filter:blur(12px);box-shadow:0 10px 30px rgba(0,0,0,.05);border-bottom:1px solid rgba(255,255,255,.65)}.header-bar{min-height:78px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.brand{display:flex;align-items:center;gap:14px;font-weight:800}.brand-mark{width:44px;height:44px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;box-shadow:var(--shadow)}.brand-copy strong{display:block;font-size:1.04rem;letter-spacing:-.03em}.brand-copy span{display:block;font-size:.78rem;color:var(--muted)}
.nav .menu{display:flex;gap:8px;list-style:none;margin:0;padding:0}.nav .menu a{display:inline-flex;align-items:center;min-height:42px;padding:0 16px;border-radius:999px;color:var(--muted)}.nav .menu a:hover,.nav .current-menu-item>a{background:#fff;box-shadow:inset 0 0 0 1px var(--border);color:var(--text)}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 22px;border-radius:999px;font-weight:700;border:0;cursor:pointer;transition:.22s ease}.btn--accent{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;box-shadow:0 12px 24px rgba(0,0,0,.14)}.btn--ghost{background:rgba(255,255,255,.14);color:#fff;box-shadow:inset 0 0 0 1px rgba(255,255,255,.18)}.btn:hover{transform:translateY(-2px)}
.menu-toggle{display:none;width:46px;height:46px;border:0;border-radius:14px;background:#fff;box-shadow:inset 0 0 0 1px var(--border)}.menu-toggle span,.menu-toggle::before,.menu-toggle::after{content:"";display:block;width:20px;height:2px;background:var(--text);margin:0 auto;transition:.2s}.menu-toggle::before{transform:translateY(-6px)}.menu-toggle::after{transform:translateY(4px)}.menu-toggle.is-open span{opacity:0}.menu-toggle.is-open::before{transform:translateY(2px) rotate(45deg)}.menu-toggle.is-open::after{transform:rotate(-45deg)}.mobile-drawer{display:none;padding:0 0 18px}.mobile-drawer.is-open{display:block}.mobile-drawer .menu{display:grid;gap:10px;list-style:none;padding:0;margin:0}.mobile-drawer .menu a{display:block;padding:14px 16px;border-radius:18px;background:#fff;box-shadow:inset 0 0 0 1px var(--border)}
.hero{padding:52px 0 30px}.hero-panel{display:grid;grid-template-columns:1.1fr .9fr;gap:28px;padding:clamp(28px,4vw,44px);border-radius:calc(var(--radius) + 10px);background:linear-gradient(135deg,var(--hero1),var(--hero2));color:#fff;box-shadow:var(--shadow)}.eyebrow{display:inline-flex;padding:8px 14px;border-radius:999px;background:rgba(255,255,255,.12);font-size:.82rem;font-weight:700;margin-bottom:16px}.hero h1{margin:0;font-size:clamp(2.4rem,6vw,4rem);line-height:.96;letter-spacing:-.05em}.hero p{margin:18px 0 0;max-width:58ch;color:rgba(255,255,255,.78)}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}.hero-metrics{display:grid;gap:14px;list-style:none;padding:0;margin:0}.hero-metrics li{padding:18px;border-radius:calc(var(--radius) - 8px);background:rgba(255,255,255,.12)}.hero-metrics strong{display:block;margin-bottom:7px}.hero-metrics span{font-size:.93rem;color:rgba(255,255,255,.8)}
.section{padding:26px 0 8px}.section-head{display:flex;align-items:end;justify-content:space-between;gap:18px;margin-bottom:18px}.section-head h2,.archive-hero h1,.search-hero h1,.single-hero h1,.page-box h1{margin:0;font-size:clamp(1.8rem,4vw,2.7rem);line-height:1.05;letter-spacing:-.04em}.section-head p,.archive-hero p,.search-hero p,.lead{margin:0;max-width:62ch;color:var(--muted)}
.calc-grid,.focus-grid,.post-grid,.related-grid,.footer-grid{display:grid;gap:20px}.calc-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.focus-grid,.post-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.related-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
.calc-card,.focus-card,.card,.aside-card,.archive-hero,.search-hero,.article-box,.page-box,.calc-shell{background:var(--surface);border:1px solid var(--border);box-shadow:0 10px 26px rgba(15,23,42,.08)}.calc-card,.focus-card,.card,.aside-card,.calc-shell{border-radius:var(--radius)}.calc-card,.focus-card{padding:22px}
.chip,.badge{display:inline-flex;padding:7px 12px;border-radius:999px;font-size:.72rem;font-weight:800;letter-spacing:.04em;text-transform:uppercase;color:var(--accent);background:color-mix(in srgb,var(--accent) 12%,white)}.calc-card h3,.focus-card h3,.card h3,.aside-card h3,.widget-title{margin:14px 0 8px;font-size:1.18rem;line-height:1.15;letter-spacing:-.03em}.calc-card p,.focus-card p,.card p,.card-meta,.widget-list li,.widget-list a,.cat-list a{color:var(--muted)}
.card{overflow:hidden;display:flex;flex-direction:column;transition:.22s ease}.card:hover,.calc-card:hover,.focus-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}.card-media{aspect-ratio:16/10;background:linear-gradient(135deg,color-mix(in srgb,var(--accent) 16%,white),color-mix(in srgb,var(--accent2) 14%,white));overflow:hidden}.card-media img{width:100%;height:100%;object-fit:cover}.card-body{display:flex;flex-direction:column;gap:12px;padding:22px;flex:1}.card h3{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:2.35em}.card p{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;font-size:.96rem;line-height:1.72}.card-meta{margin-top:auto;display:flex;flex-wrap:wrap;gap:10px;font-size:.87rem}
.shell{display:grid;grid-template-columns:minmax(0,760px) minmax(260px,320px);gap:28px;align-items:start;padding:30px 0 46px}.article-box,.page-box{padding:clamp(22px,4vw,34px);border-radius:calc(var(--radius) + 4px)}.single-hero{padding-bottom:18px;border-bottom:1px solid var(--border);margin-bottom:20px}.single-meta,.entry-footer{display:flex;flex-wrap:wrap;gap:12px;color:var(--muted)}.featured{margin-top:20px;border-radius:calc(var(--radius) - 6px);overflow:hidden}
.entry-content p{font-size:1.03rem;line-height:1.84;color:color-mix(in srgb,var(--text) 84%,white);margin:0 0 1.18em}.entry-content h2{margin:2.4em 0 .75em;font-size:1.7rem;line-height:1.15;letter-spacing:-.04em;padding-bottom:10px;border-bottom:2px solid color-mix(in srgb,var(--accent) 36%,white)}.entry-content h3{margin:1.8em 0 .6em;font-size:1.28rem;line-height:1.24;letter-spacing:-.03em}.entry-content ul,.entry-content ol{padding-left:24px;margin:0 0 1.3em}.entry-content li{margin-bottom:.58em}.entry-content blockquote{margin:1.6em 0;padding:18px 20px;border-left:4px solid var(--accent);border-radius:0 18px 18px 0;background:color-mix(in srgb,var(--accent) 10%,white)}.entry-content a,.widget-list a:hover,.cat-list a:hover,.entry-footer a:hover{color:var(--accent)}.entry-content code{padding:2px 7px;border-radius:8px;background:color-mix(in srgb,var(--accent2) 8%,white)}.entry-content pre{margin:1.6em 0;padding:18px;border-radius:18px;background:#111827;color:#e5eef8;overflow:auto}.entry-content img{margin:22px auto;border-radius:18px}
.table-wrap{margin:1.5em 0;overflow:auto;border:1px solid var(--border);border-radius:18px;box-shadow:0 10px 26px rgba(15,23,42,.08)}.entry-content table{width:100%;border-collapse:collapse;background:var(--surface)}.entry-content th{padding:14px 16px;background:linear-gradient(135deg,var(--hero1),var(--hero2));color:#fff;text-align:left}.entry-content td{padding:14px 16px;border-bottom:1px solid var(--border)}.entry-content tr:nth-child(even){background:var(--surface2)}
.toc,.interlink{margin:0 0 20px;padding:20px 22px;border-radius:calc(var(--radius) - 6px);border:1px solid var(--border);background:var(--surface2)}.toc[hidden]{display:none !important}.toc h2,.interlink h3,.related h2{margin:0 0 10px}.toc ol,.interlink ul,.widget-list,.cat-list,.footer-list{list-style:none;padding:0;margin:0;display:grid;gap:10px}.toc a,.interlink a{color:var(--muted)}
.sidebar{position:sticky;top:96px;display:grid;gap:18px}.aside-card{padding:22px}.cat-list a,.widget-list a{display:flex;justify-content:space-between;gap:12px;padding:11px 0;border-bottom:1px solid color-mix(in srgb,var(--border) 74%,white)}.widget-list li:last-child a,.cat-list li:last-child a{border-bottom:0;padding-bottom:0}.related{margin-top:32px}
.archive-hero,.search-hero{padding:26px;border-radius:calc(var(--radius) + 2px);margin:28px 0 18px}.pagination{display:flex;justify-content:center;margin:28px 0 10px}.nav-links{display:flex;flex-wrap:wrap;gap:10px}.nav-links a,.nav-links span{display:inline-flex;align-items:center;justify-content:center;min-width:46px;min-height:46px;padding:0 16px;border-radius:999px;background:var(--surface);border:1px solid var(--border);color:var(--muted);box-shadow:0 8px 18px rgba(15,23,42,.06)}.nav-links .current{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;border-color:transparent}
.calc-shell{padding:24px}.calc-form{display:grid;gap:18px}.calc-fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.calc-field{display:grid;gap:7px}.calc-field span{font-size:.92rem;font-weight:700}.calc-field input,.search-field{width:100%;min-height:50px;padding:0 16px;border-radius:16px;border:1px solid var(--border);background:#fff;font:inherit}.calc-output{padding:18px;border-radius:20px;background:var(--surface2);border:1px solid var(--border)}.search-form{display:flex;gap:10px}
.site-footer{margin-top:42px;padding:34px 0 22px;background:linear-gradient(180deg,color-mix(in srgb,var(--hero1) 95%,black),color-mix(in srgb,var(--hero2) 76%,black));color:rgba(255,255,255,.84)}.footer-grid{grid-template-columns:minmax(0,1.2fr) repeat(2,minmax(0,.9fr))}.site-footer h3{margin:0 0 12px;font-size:1rem;color:#fff}.site-footer a{color:rgba(255,255,255,.74)}.footer-meta{margin-top:18px;padding-top:14px;border-top:1px solid rgba(255,255,255,.12);font-size:.9rem;color:rgba(255,255,255,.64)}
.page404{min-height:calc(100vh - 220px);display:grid;place-items:center;padding:48px 0}.page404-box{width:min(700px,100%);padding:38px;text-align:center;border-radius:calc(var(--radius) + 6px);background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow)}.page404-code{font-size:clamp(3rem,12vw,7rem);font-weight:800;line-height:1;letter-spacing:-.08em;margin-bottom:12px}.sr{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}
@media(max-width:1100px){.focus-grid,.post-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.shell,.footer-grid{grid-template-columns:1fr}.sidebar{position:static}}@media(max-width:860px){.nav,.header-cta{display:none}.menu-toggle{display:inline-block}.hero-panel,.calc-grid,.related-grid{grid-template-columns:1fr}}@media(max-width:700px){.calc-fields,.focus-grid,.post-grid{grid-template-columns:1fr}.container{width:min(1240px,calc(100% - 24px))}.article-box,.page-box,.archive-hero,.search-hero{padding:22px}}
.vent-hero{display:grid;grid-template-columns:1.1fr .9fr;gap:24px;align-items:stretch}.vent-copy,.vent-panel,.flow-card{background:rgba(255,255,255,.78);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.7);box-shadow:0 16px 40px rgba(2,132,199,.12)}.vent-copy{padding:34px;border-radius:32px}.vent-panel{display:grid;gap:16px;padding:24px;border-radius:32px}.vent-bubble{padding:18px 18px 16px;border-radius:22px;background:linear-gradient(180deg,#fff,#effaff)}.vent-bubble strong{display:block;margin-bottom:8px}.vent-bubble span{color:var(--muted)}.vent-flow-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}.flow-card{padding:22px;border-radius:26px}.flow-card h3{margin:0 0 8px;font-size:1.15rem}.flow-card p{margin:0;color:var(--muted)}@media(max-width:1100px){.vent-flow-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:860px){.vent-hero,.vent-flow-grid{grid-template-columns:1fr}}
.section-head h2,.archive-hero h1,.search-hero h1,.single-hero h1,.page-box h1,.related h2,.toc h2,.interlink h3,.calc-card h3,.focus-card h3,.card h3,.widget-title,.flow-card h3,.vent-bubble strong{color:var(--text)!important;opacity:1}
.section-head h2{font-weight:800}
nav[aria-label="Breadcrumbs"]{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:18px;padding:12px 14px;border-radius:16px;background:color-mix(in srgb,var(--surface2) 80%,white);border:1px solid var(--border)}
nav[aria-label="Breadcrumbs"] a{color:var(--text);font-weight:700}
nav[aria-label="Breadcrumbs"] span{color:var(--muted)}
.rating-box{margin-top:28px;padding:22px;border-radius:18px;background:color-mix(in srgb,var(--surface2) 85%,white);border:1px solid var(--border);box-shadow:0 10px 26px rgba(15,23,42,.08)}
.rating-summary{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px}
.rating-box h2{margin:0 0 8px;color:var(--text);font-size:1.18rem;line-height:1.2}
.rating-note{margin:0;color:var(--muted)}
.rating-status{font-weight:800;color:var(--text)}
.rating-form{margin-top:16px}
.rating-stars{display:flex;flex-wrap:wrap;gap:10px}
.rating-star{width:48px;height:48px;border-radius:14px;border:1px solid var(--border);background:var(--surface);color:#f59e0b;font-size:1.45rem;line-height:1;cursor:pointer;transition:.2s ease}
.rating-star:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.site-header{position:relative;top:auto;backdrop-filter:none;background:#fff}
.rating-box h2{display:none}
.rating-title{margin:0 0 8px;color:var(--text);font-size:1.18rem;font-weight:800;line-height:1.2}
.screen-reader-text{position:absolute !important;width:1px !important;height:1px !important;padding:0 !important;margin:-1px !important;overflow:hidden !important;clip:rect(0,0,0,0) !important;white-space:nowrap !important;border:0 !important}
.site-header{position:relative;top:auto;z-index:40;background:#fff;border-bottom:1px solid var(--border);box-shadow:0 10px 30px rgba(0,0,0,.04)}
.header-utility{border-bottom:1px solid color-mix(in srgb,var(--border) 78%,white);background:linear-gradient(180deg,#fff,color-mix(in srgb,var(--surface2) 56%,white))}
.header-utility__inner{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:54px}
.utility-links,.mobile-quicklinks{display:flex;flex-wrap:wrap;gap:10px}
.utility-links a,.mobile-quicklinks a,.utility-pill{display:inline-flex;align-items:center;min-height:38px;padding:0 14px;border-radius:999px;font-size:.9rem;font-weight:700;color:var(--muted);background:color-mix(in srgb,var(--surface2) 70%,white);border:1px solid color-mix(in srgb,var(--border) 86%,white)}
.utility-links a:hover,.mobile-quicklinks a:hover,.utility-pill:hover{color:var(--text);border-color:var(--accent)}
.header-main{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:82px}
.nav{margin-left:auto}
.nav ul,.nav .menu{display:flex;flex-wrap:wrap;gap:8px;list-style:none;margin:0;padding:0}
.nav li{list-style:none}
.nav a{display:inline-flex;align-items:center;min-height:44px;padding:0 16px;border-radius:999px;color:var(--muted)}
.nav a:hover,.nav .current-menu-item>a,.nav .current_page_item>a{background:#fff;box-shadow:inset 0 0 0 1px var(--border);color:var(--text)}
.mobile-drawer{display:none;padding:0 0 18px}
.mobile-drawer.is-open{display:grid;gap:14px}
.mobile-drawer .menu{display:grid;gap:10px;list-style:none;padding:0;margin:0}
.mobile-drawer .menu li{list-style:none}
.mobile-drawer .menu a{display:block;padding:14px 16px;border-radius:18px;background:#fff;box-shadow:inset 0 0 0 1px var(--border)}
.section-title,.card-title,.block-title,.widget-title,.footer-title,.flow-card__title{margin:0;font-size:clamp(1.08rem,2vw,1.28rem);font-weight:800;line-height:1.18;letter-spacing:-.03em;color:var(--text)}
.section-head .section-title{font-size:clamp(1.8rem,4vw,2.7rem);line-height:1.05;letter-spacing:-.04em}
.card-title{margin-top:14px;margin-bottom:8px}
.block-title{margin-bottom:10px}
.widget-title{margin-bottom:12px}
.footer-title{margin-bottom:12px;color:#fff}
.flow-card__title{margin-bottom:8px}
.calc-card h3,.focus-card h3,.card h3,.aside-card h3,.site-footer h3,.flow-card h3,.section-head h2,.toc h2,.interlink h3,.related h2{display:none}
@media(max-width:860px){.header-utility__inner{display:none}.nav{display:none}.menu-toggle{display:inline-block}.header-main{min-height:74px}}