.unit{font-size:.5em;font-weight:600;color:var(--muted);letter-spacing:0}
.error{color:var(--danger);font-weight:600;margin:0}
.small{font-size:.9rem}
.hub h2{margin-top:1.6em}
[hidden]{display:none!important}
/* ---------- base (shared) ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}
body{margin:0;background:var(--bg);color:var(--text);font:400 17px/1.65 var(--font-body);text-rendering:optimizeLegibility}
img,svg,canvas{max-width:100%;height:auto}
a{color:var(--link);text-underline-offset:3px}
a:hover{color:var(--link-hover)}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px;border-radius:6px}
h1,h2,h3{font-family:var(--font-head);line-height:1.2;color:var(--heading);letter-spacing:-.01em}
h1{font-size:clamp(1.9rem,1.3rem + 2.6vw,2.9rem);margin:.4em 0 .35em}
h2{font-size:clamp(1.4rem,1.15rem + 1vw,1.85rem);margin:1.8em 0 .5em}
h3{font-size:1.2rem;margin:1.4em 0 .4em}
p,ul,ol{margin:0 0 1em}
.wrap{width:100%;max-width:1160px;margin:0 auto;padding:0 16px}
@media (min-width:768px){.wrap{padding:0 32px}}
.skip{position:absolute;left:-9999px;top:8px;background:var(--primary);color:var(--on-primary);padding:8px 12px;border-radius:8px;z-index:100}
.skip:focus{left:8px}
.muted{color:var(--muted)}.small{font-size:.875rem}
.lead{font-size:1.15rem;color:var(--text-2);max-width:68ch}

/* header */
.top{position:sticky;top:0;z-index:40;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}
.top__in{display:flex;align-items:center;gap:12px;min-height:64px}
.logo{white-space:nowrap;display:inline-flex;align-items:center;gap:10px;font:700 1.15rem var(--font-head);color:var(--heading);text-decoration:none}
.logo svg{width:34px;height:34px;flex:none}
.menu-btn{margin-left:auto;display:inline-grid;place-items:center;width:44px;height:44px;border:1px solid var(--line);border-radius:12px;background:var(--surface);color:var(--text);cursor:pointer}
.nav{display:none;position:absolute;left:0;right:0;top:64px;background:var(--bg);border-bottom:1px solid var(--line)}
.nav.open{display:block}
.nav ul{list-style:none;margin:0;padding:8px 16px 16px}
.nav a{display:block;padding:12px 8px;color:var(--text);text-decoration:none;border-radius:10px;font-weight:500}
.nav a:hover,.nav a[aria-current]{background:var(--surface-2);color:var(--primary)}
@media (min-width:1100px){
  .menu-btn{display:none}
  .nav{display:block;position:static;margin-left:auto;border:0;background:none}
  .nav ul{display:flex;gap:4px;padding:0}
  .nav a{padding:8px 10px;font-size:.93rem;white-space:nowrap}
}

/* breadcrumbs */
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;padding:0;margin:18px 0 0;font-size:.875rem;color:var(--muted)}
.crumbs li+li::before{content:"›";margin-right:6px;color:var(--muted)}
.crumbs a{color:var(--muted)}

.content{padding-bottom:48px}
.content>p,.content>ul,.content>ol,.content>h2,.content>h3{max-width:72ch}
.updated{margin-top:40px;font-size:.875rem;color:var(--muted)}

/* cards & tool */
.tool{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);margin:24px 0}
@media (min-width:768px){.tool{padding:28px}}
.grid{display:grid;gap:16px}
@media (min-width:640px){.grid-2{grid-template-columns:1fr 1fr}.grid-3{grid-template-columns:repeat(3,1fr)}}
.field{display:flex;flex-direction:column;gap:6px;min-width:0}
.field label,.label{font-weight:600;font-size:.95rem;color:var(--heading)}
.help{font-size:.85rem;color:var(--muted)}
input,select,textarea{font:inherit;font-size:16px;color:var(--text);background:var(--bg);border:1.5px solid var(--line-strong);border-radius:12px;min-height:48px;padding:10px 14px;width:100%;min-width:0;max-width:100%}
input:focus,select:focus,textarea:focus{border-color:var(--primary);outline:none;box-shadow:0 0 0 4px var(--ring)}
input[type=radio],input[type=checkbox]{min-height:auto;width:20px;height:20px;accent-color:var(--primary)}
.seg{display:flex;flex-wrap:wrap;gap:8px}
.seg label{display:inline-flex;align-items:center;gap:8px;padding:10px 14px;border:1.5px solid var(--line-strong);border-radius:999px;cursor:pointer;min-height:44px;font-weight:500}
.seg input{position:absolute;opacity:0;width:1px;height:1px}
.seg label:has(input:checked){border-color:var(--primary);background:var(--primary-soft);color:var(--primary-strong)}
.seg label:has(input:focus-visible){outline:3px solid var(--focus);outline-offset:2px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:12px 22px;border-radius:12px;border:0;background:var(--primary);color:var(--on-primary);font:600 1rem var(--font-body);cursor:pointer;text-decoration:none;transition:transform .15s ease,background .2s ease;touch-action:manipulation}
.btn:hover{background:var(--primary-strong);color:var(--on-primary)}
.btn:active{transform:scale(.98)}
.btn--ghost{background:transparent;color:var(--primary);border:1.5px solid var(--line-strong)}
.btn--ghost:hover{background:var(--surface-2);color:var(--primary-strong)}
.actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.error{color:var(--danger);font-size:.9rem;min-height:1.2em}

.result{margin-top:22px;padding:18px;border-radius:14px;background:var(--surface-2);border:1px solid var(--line)}
.result[hidden]{display:none}
.big{font:700 clamp(1.8rem,1.4rem + 2vw,2.6rem)/1.1 var(--font-head);color:var(--primary-strong);font-variant-numeric:tabular-nums}
.kv{display:grid;grid-template-columns:1fr auto;gap:8px 16px;margin:12px 0 0}
.kv dt{color:var(--text-2)}.kv dd{margin:0;font-weight:600;text-align:right;font-variant-numeric:tabular-nums}
.kv .total{border-top:1px solid var(--line-strong);padding-top:8px;font-size:1.05rem}

.cards{display:grid;gap:14px;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));margin:18px 0}
.card{display:block;padding:18px;border-radius:var(--radius);background:var(--surface);border:1px solid var(--line);text-decoration:none;color:var(--text);transition:border-color .2s ease,transform .2s ease}
.card:hover{border-color:var(--primary);transform:translateY(-2px);color:var(--text)}
.card strong{display:block;font:600 1.05rem var(--font-head);color:var(--heading);margin-bottom:4px}
.card span{font-size:.92rem;color:var(--muted)}

.note{padding:14px 16px;border-left:4px solid var(--primary);background:var(--surface-2);border-radius:0 12px 12px 0;margin:18px 0;max-width:72ch}
.note--warn{border-color:var(--warn)}
table{width:100%;border-collapse:collapse;margin:14px 0 20px;font-size:.95rem}
.table-wrap{overflow-x:auto;max-width:100%}
th,td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
th{font-weight:600;color:var(--heading);background:var(--surface-2)}
details{border:1px solid var(--line);border-radius:12px;padding:0 16px;margin:10px 0;background:var(--surface);max-width:72ch}
summary{cursor:pointer;padding:14px 0;font-weight:600;color:var(--heading);min-height:44px}
details[open] summary{border-bottom:1px solid var(--line);margin-bottom:12px}


/* footer */
.foot{border-top:1px solid var(--line);background:var(--surface);padding:32px 0 24px;margin-top:24px}
.foot__in{display:grid;gap:20px;margin-bottom:16px}
@media (min-width:768px){.foot__in{grid-template-columns:1.2fr 1fr}}
.foot__links{list-style:none;padding:0;margin:0;display:grid;gap:6px;grid-template-columns:1fr 1fr}
.foot__links a{color:var(--text-2);text-decoration:none}
.foot__links a:hover{color:var(--primary)}
.logo--foot{margin-bottom:8px}
.langs{display:flex;gap:2px;margin-left:auto;padding:3px;border:1px solid var(--line);border-radius:999px;background:var(--surface)}
.langs a{display:inline-grid;place-items:center;min-width:40px;min-height:36px;padding:0 8px;border-radius:999px;font:600 .8rem var(--font-body);color:var(--text-2);text-decoration:none}
.langs a[aria-current]{background:var(--primary);color:var(--on-primary)}
.langs a:hover:not([aria-current]){background:var(--surface-2)}
.langs+.menu-btn{margin-left:8px}
@media (min-width:1100px){.langs{order:3;margin-left:12px}.nav{margin-left:auto}}

/* ---------- placements (filled from /place.config.js) ---------- */
.pl-x[hidden],.pl-x__sentinel{display:none}
.pl-x{margin:28px auto;max-width:100%;text-align:center;overflow:hidden}
.pl-x__in{display:flex;justify-content:center;align-items:center;max-width:100%}
.pl-x__in>*{max-width:100%}
.pl-x__in img{height:auto;border-radius:10px}
.pl-x__label{font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin-bottom:6px}
.pl-x--header{margin:16px auto 0}
.pl-x ins.adsbygoogle[data-ad-status="unfilled"]{display:none!important}
.pl-x:has(ins.adsbygoogle[data-ad-status="unfilled"]){display:none}
.pl-x--sticky{position:fixed;left:0;right:0;bottom:0;z-index:60;margin:0;padding:6px 44px 6px 8px;background:var(--surface);border-top:1px solid var(--line);box-shadow:0 -8px 24px rgba(0,0,0,.12)}
.pl-x--sticky .pl-x__in{min-height:50px;max-height:110px}
.pl-x__close{position:absolute;top:50%;right:6px;transform:translateY(-50%);width:36px;height:36px;border-radius:50%;border:1px solid var(--line);background:var(--bg);color:var(--text);font-size:1.2rem;line-height:1;cursor:pointer}
html.has-sticky-place body{padding-bottom:120px}
@media (min-width:768px){.pl-x--sticky{left:auto;right:16px;bottom:16px;max-width:360px;border:1px solid var(--line);border-radius:14px}}

/* ---------- language menu (4+ languages) ---------- */
.langs-menu{position:relative;margin-left:auto}
.langs-menu summary{list-style:none;display:inline-flex;align-items:center;gap:7px;height:40px;padding:0 10px;
 border:1px solid var(--line);border-radius:10px;background:var(--surface);color:var(--text-2);
 font:600 .78rem/1 var(--font-body);letter-spacing:.06em;cursor:pointer;transition:border-color .15s ease,color .15s ease}
.langs-menu summary:hover{border-color:var(--line-strong);color:var(--text)}
.langs-menu summary::-webkit-details-marker{display:none}
.langs-menu summary .ic{flex:none;opacity:.75}
.langs-menu .caret{transition:transform .18s ease}
.langs-menu[open] .caret{transform:rotate(180deg)}
.langs-menu[open] summary{border-color:var(--line-strong);color:var(--text)}
.langs-menu__code{font-variant-numeric:tabular-nums}
.langs-menu ul{position:absolute;right:0;top:calc(100% + 8px);z-index:50;list-style:none;margin:0;padding:6px;
 min-width:200px;background:var(--surface);border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow)}
.langs-menu li a{display:grid;grid-template-columns:30px 1fr;gap:8px;align-items:center;padding:9px 10px;border-radius:8px;
 color:var(--text);text-decoration:none;font-size:.94rem}
.langs-menu li a b{font:600 .7rem/1 var(--font-body);letter-spacing:.06em;color:var(--muted)}
.langs-menu li a:hover{background:var(--surface-2)}
.langs-menu li a[aria-current]{background:var(--surface-2);font-weight:600}
.langs-menu li a[aria-current] b{color:var(--primary)}
.langs-menu+.menu-btn{margin-left:8px}
@media (min-width:1100px){.langs-menu{order:3;margin-left:12px}}

/* ---------- emoji icons ---------- */
.emo{font-family:"Apple Color Emoji","Segoe UI Emoji","Noto Color Emoji",sans-serif;font-style:normal;line-height:1}
.nav .emo{margin-right:6px;font-size:1rem}
.card .emo-tile{display:inline-grid;place-items:center;width:44px;height:44px;margin-bottom:10px;border-radius:12px;background:var(--surface-2);font-size:1.4rem}
@media (max-width:420px){.top__in{gap:8px}.logo{gap:8px;font-size:.95rem;min-width:0;overflow:hidden}.logo span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;min-width:0}.logo svg{width:28px;height:28px}.langs{margin-left:auto;padding:2px}.langs a{min-width:34px;padding:0 5px}.langs+.menu-btn,.langs-menu+.menu-btn{margin-left:4px}.menu-btn{flex:none}}
/* ============ Blueprint — тема будівельних калькуляторів ============
   Напрям: technical drawing / site plan. Сигнатура: креслярська сітка, помаранчевий маркер, розмірні риски. */
:root{
--font-head:Archivo,"Segoe UI",system-ui,sans-serif;--font-body:Inter,"Segoe UI",system-ui,sans-serif;--font-mono:"IBM Plex Mono",ui-monospace,Consolas,monospace;
--bg:#EEF3FA;--surface:#FFFFFF;--surface-2:#DFE9F6;--text:#14233A;--text-2:#38506F;--heading:#0E2A4F;--muted:#5D7291;
--line:#CBD9EC;--line-strong:#0E2A4F;--primary:#0E2A4F;--primary-strong:#09203D;--primary-soft:#DCE8F8;--on-primary:#FFFFFF;
--orange:#FF7A18;--orange-soft:#FFE3CC;--cyan:#1E8FB5;--link:#0B5E8A;--link-hover:#083F5E;--focus:#FF7A18;--ring:rgba(255,122,24,.28);
--danger:#B42318;--warn:#8A5200;--good:#0F7A4A;--radius:12px;--shadow:0 1px 2px rgba(14,42,79,.06),0 10px 28px rgba(14,42,79,.09);color-scheme:light}
@media (prefers-color-scheme:dark){:root{
--bg:#091A2E;--surface:#0F2540;--surface-2:#16314F;--text:#DDE8F6;--text-2:#B4C7E0;--heading:#F2F7FF;--muted:#8CA3C2;
--line:#1E3A5C;--line-strong:#4E7FB5;--primary:#7FB2E8;--primary-strong:#A8CDF7;--primary-soft:#12293F;--on-primary:#06121F;
--orange:#FF9145;--orange-soft:#3A2214;--cyan:#59C2E4;--link:#8FC4EA;--link-hover:#BFDEF6;--danger:#FF8A80;--good:#5BD69A;
--shadow:0 12px 32px rgba(0,0,0,.4);color-scheme:dark}}
body{background-color:var(--bg);background-image:
 linear-gradient(rgba(30,143,181,.10) 1px,transparent 1px),
 linear-gradient(90deg,rgba(30,143,181,.10) 1px,transparent 1px);
 background-size:24px 24px}
@media (prefers-color-scheme:dark){body{background-image:
 linear-gradient(rgba(89,194,228,.08) 1px,transparent 1px),
 linear-gradient(90deg,rgba(89,194,228,.08) 1px,transparent 1px)}}
h1,h2,h3{font-family:var(--font-head);color:var(--heading);letter-spacing:-.015em}
h1{font-weight:700;font-size:clamp(1.85rem,1.2rem + 2.5vw,2.9rem);line-height:1.1}
h1::after{content:"";display:block;width:110px;height:10px;margin-top:16px;
 background:repeating-linear-gradient(90deg,var(--orange) 0 3px,transparent 3px 11px);border-bottom:2px solid var(--orange)}
h2{font-weight:600;font-size:clamp(1.25rem,1.05rem + .7vw,1.6rem);padding-left:14px;border-left:4px solid var(--orange)}
h3{font-weight:600;color:var(--text)}
.lead{font-size:1.08rem}
.top{background:rgba(238,243,250,.92);border-bottom:2px solid var(--line-strong)}
@media (prefers-color-scheme:dark){.top{background:rgba(9,26,46,.92)}}
.logo{font-family:var(--font-head);font-weight:700;letter-spacing:-.01em}
.nav a{font-weight:500;border-radius:8px}
.nav a:hover{background:var(--surface-2);color:var(--heading)}
.nav a[aria-current]{background:var(--orange);color:#12243D}
.langs{border:2px solid var(--line-strong);background:var(--surface)}
.langs a[aria-current]{background:var(--line-strong);color:var(--surface)}
@media (prefers-color-scheme:dark){.langs a[aria-current]{background:var(--orange);color:#12243D}}
/* інструмент — як аркуш креслення з рамкою */
.tool{position:relative;background:var(--surface);border:2px solid var(--line-strong);border-radius:8px;box-shadow:var(--shadow);padding:clamp(16px,3vw,26px)}
.tool::before{content:"";position:absolute;inset:6px;border:1px dashed var(--line);border-radius:4px;pointer-events:none}
.tool>*{position:relative}
.field label,.field .label{font-weight:500;color:var(--text-2)}
input,select{border:1.5px solid var(--line);border-radius:8px;background:var(--bg);font-family:var(--font-mono);font-size:1rem}
@media (prefers-color-scheme:dark){input,select{background:#0B1E33}}
input:focus,select:focus{border-color:var(--orange);box-shadow:0 0 0 4px var(--ring)}
.seg label{border:1.5px solid var(--line);border-radius:8px;font-family:var(--font-body)}
.seg label:has(input:checked){background:var(--primary);border-color:var(--primary);color:var(--on-primary)}
@media (prefers-color-scheme:dark){.seg label:has(input:checked){color:#06121F}}
.btn{border-radius:8px;background:var(--orange);color:#12243D;font-weight:700;border:2px solid #12243D}
.btn:hover{background:#FF8E3C;color:#12243D}
.btn:active{transform:translateY(2px)}
.btn--ghost{background:transparent;color:var(--heading);border:2px solid var(--line-strong)}
.btn--ghost:hover{background:var(--surface-2);color:var(--heading)}
@media (prefers-color-scheme:dark){.btn{border-color:#0B1E33}.btn--ghost{color:var(--heading)}}
/* результат — як штамп на кресленні */
.result{background:var(--primary-soft);border:2px solid var(--line-strong);border-radius:8px;position:relative}
.result::before{content:"";position:absolute;left:0;top:0;width:100%;height:6px;
 background:repeating-linear-gradient(90deg,var(--orange) 0 14px,transparent 14px 28px)}
.big{font-family:var(--font-mono);font-weight:600;color:var(--heading);letter-spacing:-.02em}
.kv dd{font-family:var(--font-mono);font-weight:600}
.kv dt,.kv dd{border-bottom:1px dashed var(--line);padding-bottom:6px}
.kv .total{border-bottom:none;border-top:2px solid var(--line-strong);font-size:1.06rem}
.card{background:var(--surface);border:1.5px solid var(--line);border-radius:10px}
.card:hover{border-color:var(--orange);box-shadow:var(--shadow);transform:translateY(-2px)}
.card strong{font-family:var(--font-head);font-weight:600}
.card .emo-tile{background:var(--primary-soft);border:1px solid var(--line);border-radius:8px}
.cards .card:nth-child(4n+2) .emo-tile{background:var(--orange-soft)}
table{font-variant-numeric:tabular-nums}
th{background:var(--primary);color:#fff;font-family:var(--font-head);font-weight:600;font-size:.86rem;letter-spacing:.01em}
@media (prefers-color-scheme:dark){th{background:var(--surface-2);color:var(--heading)}}
td{border-color:var(--line)}
.table-wrap{border:1.5px solid var(--line);border-radius:10px}
.note{background:var(--primary-soft);border-left:4px solid var(--cyan);border-radius:0 8px 8px 0}
.note--warn{background:var(--orange-soft);border-left-color:var(--orange)}
details{border:1.5px solid var(--line);border-radius:10px}
.crumbs{font-family:var(--font-mono);font-size:.82rem}
.foot{background:var(--heading);color:#DDE8F6;border-top:6px solid var(--orange)}
.foot a,.foot .muted,.foot .logo{color:#DDE8F6}
@media (prefers-color-scheme:dark){.foot{background:#061525}}
.updated{font-family:var(--font-mono);font-size:.84rem}
@media (prefers-reduced-motion:reduce){.card{transition:none}}
/* групи полів калькулятора бетону перемикаються вибором форми */
.shape-group{display:none}
.shape-group.is-on{display:grid}