/* LNGVault — site stylesheet. Tokens inherit the CryoSurge brochure / LNGVault Brand Book v1. */
:root{
  --ground:#F5F8FA; --panel:#FFFFFF; --ink:#0B2545; --ink-2:#41556B; --muted:#6B7D8F;
  --accent:#1B6CA8; --accent-strong:#0F4C81; --line:#D5E2EC;
  --c1:#2D7DD2; --c2:#1E8A63;
  --hero-overlay:rgba(6,20,38,.55);
  --chip-bg:#0B2545; --chip-fg:#FFFFFF;
  --tile-bg:#DCEAF5; --tile-num:#0B2545; --tile-label:#1B6CA8;
  --dark-band:#0B2545; --focus:#F2B84B;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --ground:#0A1420; --panel:#101E2E; --ink:#E5EEF6; --ink-2:#B4C6D6; --muted:#7E93A6;
    --accent:#4C96D8; --accent-strong:#6FB0E8; --line:#1E3348;
    --c1:#4C96D8; --c2:#2FA476;
    --hero-overlay:rgba(4,12,24,.62);
    --chip-bg:#14273B; --chip-fg:#8FC1E8;
    --tile-bg:#14273B; --tile-num:#E5EEF6; --tile-label:#4C96D8;
    --dark-band:#132A42;
  }
}
:root[data-theme="dark"]{
  --ground:#0A1420; --panel:#101E2E; --ink:#E5EEF6; --ink-2:#B4C6D6; --muted:#7E93A6;
  --accent:#4C96D8; --accent-strong:#6FB0E8; --line:#1E3348;
  --c1:#4C96D8; --c2:#2FA476;
  --hero-overlay:rgba(4,12,24,.62);
  --chip-bg:#14273B; --chip-fg:#8FC1E8;
  --tile-bg:#14273B; --tile-num:#E5EEF6; --tile-label:#4C96D8;
  --dark-band:#132A42;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion: reduce){ html{scroll-behavior:auto} *{transition:none!important;animation:none!important} }
body{margin:0;background:var(--ground);color:var(--ink);font-family:"Avenir Next","Inter","Helvetica Neue",Helvetica,Arial,sans-serif;font-size:17px;line-height:1.62}
.disp{font-family:"Avenir Next Condensed","Barlow Condensed","Arial Narrow","Helvetica Neue",Arial,sans-serif}
.mono{font-family:"SF Mono",ui-monospace,Menlo,Consolas,monospace;font-variant-numeric:tabular-nums}
a{color:var(--accent)}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
img{max-width:100%;height:auto}
.wrap{width:min(1100px,92%);margin:0 auto}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

/* header */
.top{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--ground) 92%,transparent);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;gap:26px;min-height:66px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink)}
.brand .mark{width:30px;height:24px;flex:none}
.brand .wm{font-weight:700;font-size:23px;letter-spacing:-.01em;line-height:1}
.brand .wm b{color:var(--accent);font-weight:700}
.brand .endorse{display:block;font-size:11px;color:var(--muted);letter-spacing:.02em;margin-top:2px}
.nav{margin-left:auto;display:flex;gap:4px;align-items:center}
.nav a{color:var(--ink-2);text-decoration:none;padding:8px 11px;border-radius:5px;font-size:15px}
.nav a:hover{background:var(--tile-bg);color:var(--ink)}
.nav a[aria-current="page"]{color:var(--accent-strong);font-weight:600}
.nav a.btn{color:#fff;background:var(--accent)}
.nav a.btn:hover{background:var(--accent-strong);color:#fff}
.nav .btn{margin-left:8px}
.menu-btn{display:none;margin-left:auto;background:none;border:1px solid var(--line);border-radius:6px;padding:8px 12px;color:var(--ink);font:inherit}
@media(max-width:900px){
  .menu-btn{display:block}
  .nav{display:none;position:absolute;left:0;right:0;top:66px;background:var(--panel);border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;padding:10px 4%}
  .nav.open{display:flex}
  .nav .btn{margin:8px 0 4px}
}
.btn{display:inline-block;background:var(--accent);color:#fff;text-decoration:none;font-weight:600;padding:11px 20px;border-radius:6px;border:0;font:inherit;font-weight:600;cursor:pointer;line-height:1.2}
.btn:hover{background:var(--accent-strong)}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
.btn.ghost:hover{background:var(--tile-bg)}
.hero .btn.ghost{color:#fff;border-color:rgba(255,255,255,.5)}
.hero .btn.ghost:hover{background:rgba(255,255,255,.12)}

/* hero */
.hero{position:relative;min-height:78vh;display:flex;align-items:flex-end;overflow:hidden;color:#F2F8FD}
.hero>img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center 45%}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,20,38,.25) 0%,var(--hero-overlay) 60%,rgba(6,20,38,.88) 100%)}
.hero .wrap{position:relative;z-index:2;padding:80px 0 56px;display:grid;grid-template-columns:1.25fr .9fr;gap:40px;align-items:end}
.hero h1{font-size:clamp(40px,5.4vw,70px);line-height:.98;margin:0 0 .3em;font-weight:700;letter-spacing:-.01em;text-wrap:balance}
.hero p.sub{font-size:clamp(18px,2.1vw,23px);max-width:32em;margin:0 0 26px;color:#D9E8F4;text-wrap:balance}
.hero .actions{display:flex;gap:12px;flex-wrap:wrap}
.hero.short{min-height:46vh}
.hero.short .wrap{grid-template-columns:1fr;padding:64px 0 44px}
.hero.short h1{font-size:clamp(38px,5vw,64px)}
.hero .kicker{font-size:14px;color:#9CC9EC;margin:0 0 10px;font-weight:600}
@media(max-width:900px){ .hero .wrap{grid-template-columns:1fr} }

/* quick sizer (hero widget) */
.sizer{background:rgba(9,26,46,.78);border:1px solid rgba(255,255,255,.18);border-radius:10px;padding:20px 22px;backdrop-filter:blur(6px)}
.sizer h2{font-size:15px;margin:0 0 12px;color:#9CC9EC;font-weight:600}
.sizer label{display:block;font-size:14px;color:#D9E8F4;margin-bottom:6px}
.sizer input[type=range]{width:100%;accent-color:#6FB0E8}
.sizer .mw{font-size:38px;font-weight:700;line-height:1;margin:2px 0 14px}
.sizer .mw small{font-size:15px;font-weight:500;color:#9CC9EC;margin-left:6px}
.sizer .out{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;border-top:1px solid rgba(255,255,255,.18);padding-top:14px}
.sizer .out .v{font-size:22px;font-weight:700;line-height:1.1}
.sizer .out .l{font-size:11.5px;color:#A9C6DD;letter-spacing:.06em;text-transform:uppercase;margin-top:3px}
.sizer .more{display:block;margin-top:12px;font-size:14px;color:#9CC9EC}

/* sections */
section{padding:72px 0 8px}
section.tight{padding-top:44px}
h2{font-size:clamp(30px,4vw,44px);line-height:1.08;margin:6px 0 18px;letter-spacing:-.005em;text-wrap:balance}
h3{font-size:21px;margin:30px 0 10px}
p{max-width:66ch;color:var(--ink-2)}
p.lead{font-size:20px;color:var(--ink)}
ul,ol{color:var(--ink-2);max-width:66ch;padding-left:1.3em}
li{margin-bottom:6px}
.eyebrow{display:inline-block;letter-spacing:.32em;font-weight:700;font-size:12.5px;text-transform:uppercase;color:var(--chip-fg);background:var(--chip-bg);padding:7px 16px 6px;border-radius:3px}
.dark .eyebrow,.hero .eyebrow{color:#9CC9EC;background:transparent;padding:0;border-radius:0}
.note{font-size:14px;color:var(--muted)}
.two{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.two h2{font-size:26px;margin-top:28px}
.two h2:first-child{margin-top:0}
@media(max-width:800px){ .two{grid-template-columns:1fr} }

/* tiles */
.tiles{display:grid;grid-template-columns:repeat(4,1fr);gap:6px}
.tiles.three{grid-template-columns:repeat(3,1fr)}
.tile{background:var(--tile-bg);padding:20px 22px 16px}
.tile .v{font-size:clamp(22px,2.6vw,32px);font-weight:700;color:var(--tile-num);line-height:1.1}
.tile .l{font-size:11.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--tile-label);font-weight:700;margin-top:6px}
@media(max-width:700px){ .tiles,.tiles.three{grid-template-columns:repeat(2,1fr)} }

/* cards */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(245px,1fr));gap:22px;margin:30px 0}
.card{background:var(--panel);border:1px solid var(--line);border-left:4px solid var(--accent);border-radius:8px;padding:20px 22px;display:flex;flex-direction:column}
.card h3{margin:0 0 6px;font-size:19px}
.card p{font-size:15px;margin:0 0 8px}
.card .more{margin-top:auto;font-size:15px;font-weight:600;text-decoration:none;padding-top:8px}
.card .price{font-size:15px;color:var(--ink);font-weight:600;margin:4px 0 8px}
.card.plain{border-left:1px solid var(--line)}

/* module cards */
.modules{display:grid;grid-template-columns:repeat(auto-fit,minmax(330px,1fr));gap:26px;margin:34px 0 10px}
.mcard{background:var(--panel);border:1px solid var(--line);border-radius:10px;overflow:hidden}
.mcard img{width:100%;aspect-ratio:1.35;object-fit:cover;display:block}
.mcard .pad{padding:22px 24px 26px}
.mcard h3{margin:0 0 2px;font-size:26px}
.mcard .tag{font-size:13px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);margin-bottom:14px}
table{border-collapse:collapse;width:100%;font-size:15px}
.mcard table td{padding:7px 0;border-bottom:1px solid var(--line);color:var(--ink-2)}
.mcard table td:last-child{text-align:right;color:var(--ink);font-weight:600}
.price-row{margin-top:16px;display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
.price-row .p{font-size:30px;font-weight:700;color:var(--accent-strong)}
.price-row .was{font-size:15px;color:var(--muted);text-decoration:line-through}

/* tables */
.ttable{background:var(--panel);border:1px solid var(--line);border-radius:10px;overflow:auto;margin:26px 0}
.ttable table{font-size:15px;min-width:560px}
.ttable th{background:var(--accent-strong);color:#F2F8FD;text-align:left;padding:12px 18px;font-weight:600;letter-spacing:.04em}
:root[data-theme="dark"] .ttable th{color:#0A1420}
@media (prefers-color-scheme: dark){ :root:not([data-theme="light"]) .ttable th{color:#0A1420} }
.ttable td{padding:11px 18px;border-top:1px solid var(--line);color:var(--ink-2);vertical-align:top}
.ttable td:first-child{font-weight:600;color:var(--ink)}
.ttable td.us{background:var(--tile-bg);color:var(--ink)}

/* steps */
.steps{counter-reset:s;display:grid;gap:18px;margin:30px 0;max-width:62em}
.step{display:grid;grid-template-columns:56px 1fr;gap:18px;align-items:start}
.step .n{font-size:34px;font-weight:700;color:var(--accent);line-height:1.15}
.step h3{margin:2px 0 6px}
.step p{margin:0}
.step .when{font-size:13px;color:var(--muted);font-weight:600;letter-spacing:.04em}

/* figures */
figure{margin:0}
.wide{width:100%;border-radius:10px;display:block;margin:30px 0 8px}
.cap{font-size:14px;color:var(--muted);margin:6px 0 0;font-style:italic}
.photos{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px;margin:30px 0}
.ph{background:var(--panel);border:1px solid var(--line);border-radius:8px;overflow:hidden}
.ph img{width:100%;aspect-ratio:1.25;object-fit:cover;display:block}
.ph figcaption{font-size:13px;color:var(--muted);padding:10px 14px}
.inv{display:flex;flex-wrap:wrap;margin:26px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:20px 0}
.inv .hstat{border-right:1px solid var(--line);padding-right:28px;margin-right:28px;margin-bottom:8px}
.inv .hstat:last-child{border-right:none}
.inv .v{color:var(--accent-strong);font-size:30px;font-weight:700}
.inv .l{color:var(--muted);font-size:12.5px;letter-spacing:.12em;text-transform:uppercase}

/* faq */
details{border-top:1px solid var(--line);padding:14px 0}
details:last-of-type{border-bottom:1px solid var(--line)}
summary{cursor:pointer;font-weight:600;color:var(--ink);list-style:none;display:flex;justify-content:space-between;gap:16px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";color:var(--accent);font-weight:700;flex:none}
details[open] summary::after{content:"–"}
details p{margin:10px 0 0}

/* calculator */
.calc{display:grid;grid-template-columns:.9fr 1.1fr;gap:34px;margin:30px 0}
@media(max-width:860px){ .calc{grid-template-columns:1fr} }
.calc .panel{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:24px 26px}
.field{margin-bottom:18px}
.field label{display:block;font-weight:600;font-size:15px;margin-bottom:6px}
.field .hint{font-size:13px;color:var(--muted);margin-top:4px}
.field input[type=number],.field select,.field input[type=text],.field input[type=email],.field input[type=tel],.field textarea{width:100%;font:inherit;padding:10px 12px;border:1px solid var(--line);border-radius:6px;background:var(--ground);color:var(--ink)}
.field input[type=range]{width:100%;accent-color:var(--accent)}
.field .rng{display:flex;justify-content:space-between;align-items:baseline}
.field .rng output{font-weight:700;font-size:22px;color:var(--ink)}
.seg{display:flex;border:1px solid var(--line);border-radius:6px;overflow:hidden}
.seg label{flex:1;text-align:center;padding:9px 6px;cursor:pointer;font-size:15px;font-weight:500;margin:0;color:var(--ink-2)}
.seg input{position:absolute;opacity:0;width:0;height:0}
.seg input:checked+span{display:block;background:var(--accent);color:#fff;margin:-9px -6px;padding:9px 6px}
.results .big{display:grid;grid-template-columns:repeat(2,1fr);gap:6px;margin-bottom:6px}
.results .tile .v{font-size:clamp(22px,2.4vw,30px)}
.results .row{display:grid;grid-template-columns:1fr auto;gap:14px;padding:10px 0;border-bottom:1px solid var(--line);font-size:15px;color:var(--ink-2)}
.results .row b{color:var(--ink)}
.results .fine{font-size:13px;color:var(--muted);margin-top:14px}
.bars{display:grid;grid-template-columns:repeat(3,1fr);gap:34px;align-items:end;height:220px;padding:0 6px;margin-top:26px}
.bgrp{display:flex;gap:8px;align-items:flex-end;justify-content:center;height:100%;border-bottom:2px solid var(--line);position:relative}
.bar{width:56px;border-radius:4px 4px 0 0;position:relative}
.bar .val{position:absolute;top:-24px;left:50%;transform:translateX(-50%);font-size:13px;font-weight:600;color:var(--ink);white-space:nowrap}
.b1{background:var(--c1)} .b2{background:var(--c2)}
.xlab{display:grid;grid-template-columns:repeat(3,1fr);gap:34px;padding:10px 6px 0;text-align:center;font-size:14px;color:var(--muted)}
.legend{display:flex;gap:20px;font-size:14px;color:var(--ink-2);margin:8px 0 0}
.legend .sw{display:inline-block;width:11px;height:11px;border-radius:3px;margin-right:7px;vertical-align:-1px}
@media(max-width:700px){ .bars{gap:16px} .bar{width:38px} }

/* form */
.form{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:26px 28px;max-width:760px}
.form .grid{display:grid;grid-template-columns:1fr 1fr;gap:0 18px}
@media(max-width:640px){ .form .grid{grid-template-columns:1fr} }
.form .hp{position:absolute;left:-9999px}
.form .status{margin-top:12px;font-size:15px}
.form .status.ok{color:var(--c2);font-weight:600}
.form .status.err{color:#B3261E;font-weight:600}
.req{color:#B3261E}

/* dark band / CTA */
.dark{background:var(--dark-band);color:#EAF3FA;margin-top:80px;padding:70px 0 60px}
.dark h2{color:#fff}
.dark p,.dark li{color:#C7DAE9}
.dark .btn{background:#fff;color:var(--ink)}
.dark .btn:hover{background:#DCEAF5}
.contacts{display:flex;flex-wrap:wrap;gap:40px;margin-top:36px;border-top:1px solid rgba(255,255,255,.2);padding-top:28px}
.contacts .c b{display:block;font-size:16px;color:#fff}
.contacts .c span{color:#9FBDD6;font-size:15px}
.fine{margin-top:40px;font-size:12.5px;color:#7E9AB3;max-width:80ch;line-height:1.6}

/* footer */
footer{border-top:1px solid var(--line);padding:40px 0 30px;font-size:14px;color:var(--muted)}
footer .wrap{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px}
footer h4{margin:0 0 10px;font-size:13px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink)}
footer a{color:var(--ink-2);text-decoration:none;display:block;margin-bottom:6px}
footer a:hover{color:var(--accent)}
footer .partners{margin-top:14px;font-size:13px}
footer .legal{grid-column:1/-1;border-top:1px solid var(--line);padding-top:16px;display:flex;flex-wrap:wrap;gap:8px 22px;align-items:center}
footer .legal a{display:inline;margin:0}
footer .theme{margin-left:auto;background:none;border:1px solid var(--line);border-radius:6px;padding:5px 10px;color:var(--ink-2);font:inherit;font-size:13px;cursor:pointer}
@media(max-width:800px){ footer .wrap{grid-template-columns:1fr 1fr} }

/* prose pages */
.prose{max-width:72ch}
.prose h2{font-size:28px;margin-top:40px}
.prose h3{font-size:20px}
.callout{background:var(--tile-bg);border-left:4px solid var(--accent);border-radius:6px;padding:16px 20px;margin:24px 0;color:var(--ink)}
.callout p{color:var(--ink);margin:0}
.badge{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--accent-strong);background:var(--tile-bg);padding:3px 8px;border-radius:3px}
.crumbs{font-size:14px;color:var(--muted);margin:22px 0 -40px}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--accent)}