@font-face {
font-family: 'Commissioner';
font-style: normal;
font-weight: 400 700;
font-display: swap;
src: url(/fonts/commissioner-400-700-normal-cyrillic.woff2) format('woff2');
unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116;
}
@font-face {
font-family: 'Commissioner';
font-style: normal;
font-weight: 400 700;
font-display: swap;
src: url(/fonts/commissioner-400-700-normal-latin.woff2) format('woff2');
unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* Глубина промерзания. Идея: геологический разрез. Четыре скважины с условной штриховкой грунтов (глина — косые линии,
песок — точки, крупнообломочный — кружки), сверху — голубой промёрзший слой, пунктир — предел 2,5 м, где формула кончается.
Земля — умбра, мороз — ледяной голубой. Commissioner. */
:root{
--paper:#fff; --ink:#2b2118; --muted:#6a5b4e; --line:#e7e1d9; --tint:#f6f2ed; --soil:#f1e8dc; --hatch:#8a6a4f;
--ice:#cfe6f5; --ice-deep:#1f6fb2; --warn:#a4461b;
--wrap:1200px; --pad:clamp(16px,4vw,48px);
--font:"Commissioner",-apple-system,"Segoe UI",Arial,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:400 17px/1.6 var(--font);font-variant-numeric:tabular-nums}
a{color:var(--ink);text-decoration:underline;text-decoration-color:var(--ice-deep);text-decoration-thickness:1.5px;text-underline-offset:3px}
a:hover{color:var(--ice-deep)}
:focus-visible{outline:3px solid var(--ice-deep);outline-offset:2px}
.skip{position:absolute;left:-9999px;top:8px;background:var(--ink);color:#fff;padding:8px 12px;z-index:9}.skip:focus{left:8px}
.vh{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
/* Шапка — срез: земля и снег */
.head{background:var(--ink);color:#fff;border-bottom:6px solid var(--ice)}
.head-in,main,.foot{width:min(100% - 2 * var(--pad),var(--wrap));margin-left:auto;margin-right:auto}
.head-in{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 28px;padding:16px 0}
.brand{display:inline-flex;align-items:center;gap:12px;color:#fff;text-decoration:none;font-weight:700;font-size:19px}
.brand-mark{width:22px;height:22px;background:linear-gradient(var(--ice) 45%,var(--ice-deep) 45%,var(--ice-deep) 55%,var(--hatch) 55%)}
.nav{display:flex;flex-wrap:wrap;gap:4px 24px}
.nav a{color:#e9e2d8;text-decoration:none;font-size:16px;padding:4px 0;border-bottom:2px solid transparent}
.nav a:hover{color:#fff;border-color:rgba(255,255,255,.35)}
.nav a[aria-current]{color:#fff;border-color:var(--ice)}
main{padding-bottom:16px}
main:focus{outline:0}
.crumbs{font-size:14.5px;color:var(--muted);padding-top:16px}
.crumbs a{color:var(--muted);text-decoration-color:var(--line)}
h1{font-weight:700;font-size:clamp(30px,4vw,48px);line-height:1.08;letter-spacing:-.02em;margin:.5em 0 .45em;text-wrap:balance}
h2{font-weight:700;font-size:clamp(22px,2.4vw,28px);line-height:1.2;letter-spacing:-.01em;margin:1.9em 0 .5em}
p{margin:0 0 1em;max-width:40em;text-wrap:pretty}
.lead{font-size:clamp(17.5px,1.6vw,19px);line-height:1.55}
.src{font-size:15px;color:var(--muted)}
/* Первый экран */
.hero{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:28px clamp(28px,5vw,64px);align-items:start;padding-bottom:clamp(20px,3vw,36px);border-bottom:1px solid var(--line)}
.hero-pic{margin:0}
.hero-pic figcaption,.method-pic figcaption{font-size:14.5px;color:var(--muted);margin-top:8px}
.res{font-weight:700;font-size:clamp(56px,8vw,104px);line-height:1;letter-spacing:-.04em;margin:.15em 0 .1em;color:var(--ice-deep)}
.res-note{font-size:16px;color:var(--muted);margin:0 0 .4em;min-height:1.6em}
.calc .res{margin-top:.25em}
.res.res-word{font-size:clamp(34px,4.4vw,52px);letter-spacing:-.02em}
.calc label,.calc legend{display:block;font-size:14px;font-weight:600;color:var(--muted);margin:0 0 6px;padding:0}
.calc input[list]{font:600 19px var(--font);width:100%;max-width:460px;padding:10px 12px;min-height:50px;border:2px solid var(--ink);border-radius:0;background:#fff;color:var(--ink)}
.calc input[list]:focus-visible{outline:3px solid var(--ice-deep);outline-offset:1px}
.soils{border:0;margin:18px 0 6px;padding:0;display:grid;gap:6px;max-width:460px}
.soils label{position:relative;display:block;cursor:pointer;margin:0;font-size:15.5px;font-weight:400;color:var(--ink)}
.soils input{position:absolute;opacity:0}
.soils span{display:block;padding:9px 12px 9px 40px;border:1.5px solid var(--line);background:#fff;position:relative}
.soils span::before{content:"";position:absolute;left:12px;top:50%;width:16px;height:16px;margin-top:-8px;border:1.5px solid var(--ink);border-radius:50%;background:#fff}
.soils input:checked+span{border-color:var(--ink);background:var(--tint)}
.soils input:checked+span::before{box-shadow:inset 0 0 0 4px #fff;background:var(--ice-deep)}
.soils input:focus-visible+span{outline:3px solid var(--ice-deep);outline-offset:2px}
.soils label:hover span{border-color:var(--ink)}
/* Разрез */
.cut{display:block;width:100%;height:auto}
.cut .sc{stroke:var(--line);stroke-width:1}
.cut .st{font:500 12px var(--font);fill:var(--muted)}
.cut .limit{stroke:var(--warn);stroke-width:1.4;stroke-dasharray:6 5}
.cut .lt{font:600 11.5px var(--font);fill:var(--warn)}
.cut .soil{stroke:none}
.cut pattern .h{stroke:var(--hatch);stroke-width:1.2}
.cut pattern .d{fill:var(--hatch)}
.cut pattern .o{fill:none;stroke:var(--hatch);stroke-width:1.1}
.cut .bore .soil{opacity:.9}
.cut .frame{fill:none;stroke:var(--ink);stroke-width:1.2}
.cut .frost{fill:var(--ice);opacity:.92;transition:height .35s cubic-bezier(.2,.7,.2,1)}
.cut .fl{stroke:var(--ice-deep);stroke-width:2.6;transition:all .35s cubic-bezier(.2,.7,.2,1)}
.cut .fv{font:700 18px var(--font);fill:var(--ice-deep);paint-order:stroke;stroke:#fff;stroke-width:4px;stroke-linejoin:round;transition:all .35s cubic-bezier(.2,.7,.2,1)}
.cut .sl{font:600 12px var(--font);fill:var(--muted)}
.cut .ground{stroke:var(--ink);stroke-width:3}
.cut .bore:not(.hl) .fv{font-weight:500;font-size:15px}
.cut .bore.hl .frame{stroke-width:3}
.cut .bore.hl .sl{fill:var(--ink)}
@media(prefers-reduced-motion:reduce){.cut .frost,.cut .fl,.cut .fv{transition:none}}
.method-pic{margin:1.4em 0;max-width:600px}
.formula{font-size:clamp(22px,2.6vw,30px);font-weight:700;padding:14px 20px;background:var(--tint);border-left:4px solid var(--ice-deep);max-width:max-content}
/* Таблицы */
.scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:0 0 1.4em}
table{border-collapse:collapse;width:100%;font-size:16px}
table.narrow{max-width:560px}
thead th{font-size:13.5px;font-weight:600;color:var(--muted);text-align:left;padding:8px 16px 8px 0;border-bottom:2px solid var(--ink);vertical-align:bottom}
td,tbody th{padding:8px 16px 8px 0;border-bottom:1px solid var(--line);text-align:left}
tbody th{font-weight:500}
.num,th.num{text-align:right;white-space:nowrap}
td:last-child,th:last-child{padding-right:0}
.strong{font-weight:700}
.over{color:var(--warn);font-weight:600;white-space:nowrap}
.na{color:var(--muted);white-space:nowrap}
tbody tr:hover th,tbody tr:hover td{background:var(--tint)}
.sw{display:inline-block;width:14px;height:14px;margin-right:8px;vertical-align:-2px;border:1px solid var(--ink);background-color:var(--soil)}
.sw-clay{background-image:repeating-linear-gradient(45deg,var(--hatch) 0 1px,transparent 1px 4px)}
.sw-sandy{background-image:radial-gradient(var(--hatch) 1px,transparent 1.3px),repeating-linear-gradient(45deg,transparent 0 5px,var(--hatch) 5px 6px);background-size:5px 5px,auto}
.sw-sand{background-image:radial-gradient(var(--hatch) 1px,transparent 1.3px);background-size:4px 4px}
.sw-gravel{background-image:radial-gradient(circle,transparent 1.6px,var(--hatch) 1.7px,var(--hatch) 2.3px,transparent 2.4px);background-size:7px 7px}
.range-col{width:28%;min-width:140px}
.range{position:relative;display:block;height:10px;background:linear-gradient(90deg,transparent calc(83.33% - 1px),var(--warn) calc(83.33% - 1px),var(--warn) 83.33%,transparent 83.33%),var(--tint)}
.range i{position:absolute;top:0;bottom:0;background:var(--ice-deep);min-width:3px}
.months{display:grid;grid-template-columns:repeat(13,minmax(0,1fr));border:1px solid var(--line);margin:0 0 1em;max-width:900px}
.mo{display:flex;flex-direction:column;align-items:center;padding:8px 2px;border-right:1px solid var(--line);font-size:13.5px}
.mo:last-child{border-right:0}
.mo span{color:var(--muted)}
.mo b{font-weight:600;font-size:15px}
.mo i{display:none}
.mo.neg{background:var(--ice)}
.mo.year{background:var(--tint)}
.finder{display:flex;align-items:center;gap:12px;margin:.4em 0 .8em;max-width:480px}
.finder label{font-weight:600;white-space:nowrap}
.finder input{flex:1;min-width:0;font:inherit;padding:9px 12px;min-height:46px;border:1.5px solid #a1958a;background:#fff;color:var(--ink)}
.finder input:hover{border-color:var(--ink)}
.empty{padding:12px 16px;background:var(--tint);border-left:4px solid var(--ice-deep)}
.popular{margin-top:3em;padding-top:1.2em;border-top:1px solid var(--line)}
.popular h2{font-size:16px;margin:0 0 .6em;color:var(--muted);font-weight:600}
.popular ul{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:8px}
.popular a{display:inline-block;padding:6px 12px;border:1.5px solid var(--line);text-decoration:none;font-size:15.5px}
.popular a:hover{border-color:var(--ink)}
ul:not(.popular ul){padding-left:1.2em;max-width:40em}
.foot{margin-top:56px;padding:24px 0 40px;border-top:2px solid var(--ink);font-size:15px;color:var(--muted)}
.foot nav{display:flex;flex-wrap:wrap;gap:4px 22px}
.foot nav a{color:var(--muted)}
.cookie{position:fixed;left:12px;right:12px;bottom:12px;max-width:560px;display:flex;gap:14px;align-items:center;background:var(--ink);color:#fff;padding:12px 14px 12px 18px;font-size:14.5px;z-index:5;border-top:4px solid var(--ice)}
.cookie[hidden]{display:none}
.cookie p{margin:0}.cookie a{color:inherit}
.cookie button{flex:none;font:600 15px/1 var(--font);min-height:40px;padding:0 16px;border:0;background:#fff;color:var(--ink);cursor:pointer}
@media(max-width:880px){.hero{grid-template-columns:minmax(0,1fr)}}
@media(max-width:640px){
body{font-size:16.5px}
.head-in{display:block}
.nav{margin-top:8px}
.m-hide{display:none}
table{font-size:15px}
td,tbody th,thead th{padding-right:10px}
.months{grid-template-columns:repeat(7,minmax(0,1fr))}
.mo:nth-child(7){border-right:0}
.mo:nth-child(-n+7){border-bottom:1px solid var(--line)}
.finder{display:block}.finder label{display:block;margin-bottom:6px}
}