/* Rulino — сайт. Шрифты Fira (OFL 1.1) хранятся локально: никаких внешних
   запросов (152-ФЗ: не передаём IP посетителей сторонним CDN). */
@font-face{font-family:"Fira Sans";font-weight:400;font-display:swap;src:url(/assets/fonts/fira-sans-cyrillic-400.woff2) format("woff2");unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:"Fira Sans";font-weight:400;font-display:swap;src:url(/assets/fonts/fira-sans-latin-400.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+20AC,U+20BD,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Fira Sans";font-weight:500;font-display:swap;src:url(/assets/fonts/fira-sans-cyrillic-500.woff2) format("woff2");unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:"Fira Sans";font-weight:500;font-display:swap;src:url(/assets/fonts/fira-sans-latin-500.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+20AC,U+20BD,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Fira Sans";font-weight:700;font-display:swap;src:url(/assets/fonts/fira-sans-cyrillic-700.woff2) format("woff2");unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:"Fira Sans";font-weight:700;font-display:swap;src:url(/assets/fonts/fira-sans-latin-700.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+20AC,U+20BD,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Fira Sans Condensed";font-weight:600;font-display:swap;src:url(/assets/fonts/fira-sans-condensed-cyrillic-600.woff2) format("woff2");unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:"Fira Sans Condensed";font-weight:600;font-display:swap;src:url(/assets/fonts/fira-sans-condensed-latin-600.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+20AC,U+20BD,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Fira Mono";font-weight:400;font-display:swap;src:url(/assets/fonts/fira-mono-cyrillic-400.woff2) format("woff2");unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:"Fira Mono";font-weight:400;font-display:swap;src:url(/assets/fonts/fira-mono-latin-400.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+20AC,U+20BD,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}

:root{
  color-scheme:light;
  --paper:#F5F8FA;--surface:#FFFFFF;--ink:#142235;--muted:#4F5F73;
  --wire:#245BB0;--wire-ink:#FFFFFF;--grid:#D8E1EC;
  --lamp:#F2A51A;--lamp-glow:rgba(242,165,26,.45);
  --ok:#1C8A53;--warn:#B4441F;--code-bg:#EAF0F6;
  --f-body:"Fira Sans",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --f-head:"Fira Sans Condensed","Fira Sans",system-ui,"Segoe UI",Arial,sans-serif;
  --f-mono:"Fira Mono",ui-monospace,"Cascadia Mono",Consolas,monospace;
  --w:1120px;
  box-sizing:border-box;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    color-scheme:dark;
    --paper:#0F1A28;--surface:#15243A;--ink:#E4EBF4;--muted:#A3B2C5;
    --wire:#7FA9EC;--wire-ink:#0F1A28;--grid:#263A55;--code-bg:#1B2D46;
    --ok:#4CC789;--warn:#F08A62;
  }
}
:root[data-theme="dark"]{
  color-scheme:dark;
  --paper:#0F1A28;--surface:#15243A;--ink:#E4EBF4;--muted:#A3B2C5;
  --wire:#7FA9EC;--wire-ink:#0F1A28;--grid:#263A55;--code-bg:#1B2D46;
  --ok:#4CC789;--warn:#F08A62;
}
*,*::before,*::after{box-sizing:inherit}
html{scroll-padding-top:72px;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:400 17px/1.6 var(--f-body);font-feature-settings:"kern","liga";padding-bottom:env(safe-area-inset-bottom,0px)}
img,svg{max-width:100%;height:auto}
a{color:var(--wire);text-underline-offset:.18em;text-decoration-thickness:1px}
a:hover{text-decoration-thickness:2px}
:focus-visible{outline:3px solid var(--wire);outline-offset:2px;border-radius:2px}
h1,h2,h3{font-family:var(--f-head);font-weight:600;line-height:1.12;letter-spacing:-.005em;margin:0 0 .5em}
h1{font-size:clamp(2.1rem,5.2vw,3.6rem)}
h2{font-size:clamp(1.6rem,3.4vw,2.35rem);margin-top:0}
h3{font-size:1.3rem}
p{margin:0 0 1em;max-width:68ch}
code,kbd,.mono{font-family:var(--f-mono);font-size:.92em}
.wrap{max-width:var(--w);margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px;top:0;background:var(--surface);padding:8px 12px;z-index:50}
.skip:focus{left:8px;top:8px}

.top{position:sticky;top:0;z-index:20;background:var(--paper);border-bottom:1px solid var(--grid);padding-top:env(safe-area-inset-top,0px)}
.top .wrap{display:flex;align-items:center;gap:24px;min-height:60px}
.logo{display:flex;align-items:center;gap:10px;font:600 1.35rem/1 var(--f-head);color:var(--ink);text-decoration:none}
.logo svg{width:28px;height:28px}
.nav{display:flex;gap:20px;margin-left:auto;align-items:center;flex-wrap:wrap}
.nav a{color:var(--ink);text-decoration:none;font-size:.97rem}
.nav a:hover{color:var(--wire)}
.nav a[aria-current="page"]{color:var(--wire);font-weight:500}
.nav a.btn{color:var(--wire-ink)}
@media (max-width:760px){.nav a.opt{display:none}.top .wrap{gap:12px}}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;border-radius:6px;border:1.5px solid var(--wire);background:var(--wire);color:var(--wire-ink);font:500 1rem/1.2 var(--f-body);text-decoration:none;cursor:pointer}
.btn:hover{filter:brightness(1.08)}
.btn.ghost{background:transparent;color:var(--wire)}
.btn.small{padding:8px 14px;font-size:.93rem}
.btn[disabled]{opacity:.55;cursor:not-allowed}

.hero{border-bottom:1px solid var(--grid);background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:24px 24px;background-position:-1px -1px}
.hero .wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;padding-top:64px;padding-bottom:64px;align-items:center}
.hero-copy{background:var(--paper);padding:8px 0;box-shadow:0 0 0 16px var(--paper)}
.lead{font-size:1.2rem;color:var(--muted);max-width:52ch}
.hero .actions{display:flex;gap:12px;flex-wrap:wrap;margin:28px 0 14px}
.fine{font-size:.9rem;color:var(--muted)}
@media (max-width:900px){.hero .wrap{grid-template-columns:1fr;gap:32px;padding-top:40px;padding-bottom:40px}}

.panel{background:var(--surface);border:1.5px solid var(--ink);border-radius:10px;padding:22px 22px 18px;position:relative}
.panel-head{display:flex;justify-content:space-between;align-items:baseline;gap:12px;margin-bottom:14px}
.panel-head strong{font:600 1.1rem/1.2 var(--f-head)}
.panel-head span{font-size:.85rem;color:var(--muted)}
.rule{font-family:var(--f-mono);font-size:.95rem;line-height:1.55;background:var(--code-bg);border-radius:6px;padding:12px 14px;margin:0 0 18px}
.rule b{font-weight:400;color:var(--wire)}
.tank-row{display:grid;grid-template-columns:72px 1fr;gap:18px;align-items:end}
.tank{position:relative;height:170px;border:2px solid var(--ink);border-top:none;border-radius:0 0 8px 8px;overflow:hidden;background:var(--paper)}
.water{position:absolute;left:0;right:0;bottom:0;background:linear-gradient(#6FA7E8,#3D78C7);transition:height .25s linear}
.mark{position:absolute;left:-2px;right:-2px;border-top:1.5px dashed var(--ink);font:400 10px/1 var(--f-mono)}
.mark i{position:absolute;right:4px;top:2px;font-style:normal;color:var(--ink);background:var(--paper);padding:0 2px}
.ctrl label{display:block;font-size:.92rem;margin-bottom:6px}
.ctrl input[type=range]{width:100%;accent-color:var(--wire)}
.out{display:flex;align-items:center;gap:12px;margin-top:16px;padding-top:14px;border-top:1px solid var(--grid)}
.lampdot{width:22px;height:22px;border-radius:50%;border:2px solid var(--ink);background:var(--paper);flex:none;transition:background .15s,box-shadow .15s}
.lampdot.on{background:var(--lamp);box-shadow:0 0 0 6px var(--lamp-glow)}
.out .state{font-weight:500}
.out .why{font-size:.88rem;color:var(--muted)}
.timer{height:4px;background:var(--grid);border-radius:2px;margin-top:10px;overflow:hidden}
.timer i{display:block;height:100%;width:0;background:var(--lamp)}
@media (prefers-reduced-motion:reduce){.water,.lampdot{transition:none}}

.sec{padding:72px 0;border-bottom:1px solid var(--grid)}
.sec.alt{background:var(--surface)}
.sec-intro{max-width:62ch;margin-bottom:36px}
.sec-intro p{color:var(--muted);font-size:1.08rem}

.steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);border-top:2px solid var(--ink);counter-reset:s}
.steps li{padding:18px 20px 4px 0;counter-increment:s}
.steps li::before{content:counter(s);display:block;font:600 2.4rem/1 var(--f-head);color:var(--wire);margin-bottom:10px}
.steps h3{font-size:1.15rem}
.steps p{color:var(--muted);font-size:.98rem}
@media (max-width:900px){.steps{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.steps{grid-template-columns:1fr}}

.rulebook{display:grid;grid-template-columns:1fr 1fr;gap:0 40px}
.rulebook article{padding:22px 0;border-top:1px solid var(--grid)}
.rulebook h3{margin-bottom:.35em}
.rulebook .rule{margin:10px 0 8px;font-size:.88rem}
.rulebook p{color:var(--muted);margin:0}
@media (max-width:800px){.rulebook{grid-template-columns:1fr}}

.twocol{display:grid;grid-template-columns:1fr 1fr;gap:48px}
@media (max-width:800px){.twocol{grid-template-columns:1fr;gap:24px}}
.plain{padding-left:1.1em;margin:0}
.plain li{margin:0 0 .55em}
ul.rules{list-style:none;padding:0}
ul.rules li{margin:0 0 8px}

table{border-collapse:collapse;width:100%;font-size:.97rem}
.tbl{overflow-x:auto;border:1px solid var(--grid);border-radius:8px;background:var(--surface)}
th,td{text-align:left;padding:11px 14px;border-bottom:1px solid var(--grid);vertical-align:top}
thead th{font:600 1.02rem/1.2 var(--f-head);background:var(--paper)}
tbody tr:last-child td,tbody tr:last-child th{border-bottom:none}
td.c,th.c{text-align:center}
.yes{color:var(--ok);font-weight:500}
.no{color:var(--muted)}

.price-box{border:1.5px solid var(--ink);border-radius:10px;background:var(--surface);padding:28px}
.price{font:600 3rem/1 var(--f-head);margin:6px 0 4px}
.price s{font-size:1.4rem;color:var(--muted);margin-left:10px;font-weight:400}
.price-note{color:var(--muted);font-size:.95rem}
.left{display:inline-block;margin-top:8px;font-size:.92rem;color:var(--ink);background:var(--code-bg);padding:3px 8px;border-radius:4px}

.buy{display:grid;gap:14px;margin-top:20px}
.buy label{font-size:.95rem}
.buy input[type=email],.buy input[type=text],.buy input[type=password]{width:100%;padding:12px 14px;font:400 1rem var(--f-body);color:var(--ink);background:var(--paper);border:1.5px solid var(--grid);border-radius:6px}
.buy input:focus{border-color:var(--wire);outline:none;box-shadow:0 0 0 3px rgba(36,91,176,.25)}
.check{display:grid;grid-template-columns:20px 1fr;gap:10px;align-items:start;font-size:.92rem;line-height:1.45}
.check input{width:18px;height:18px;margin:2px 0 0;accent-color:var(--wire)}
.hp{position:absolute;left:-5000px;width:1px;height:1px;overflow:hidden}
details.promo summary{cursor:pointer;color:var(--wire);font-size:.93rem}
details.promo[open] summary{margin-bottom:8px}

.faq details{border-top:1px solid var(--grid);padding:16px 0}
.faq details:last-child{border-bottom:1px solid var(--grid)}
.faq summary{cursor:pointer;font:500 1.08rem/1.35 var(--f-body);list-style:none;display:flex;justify-content:space-between;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font:400 1.4rem/1 var(--f-mono);color:var(--wire);flex:none}
.faq details[open] summary::after{content:"−"}
.faq details p{margin:12px 0 0;color:var(--muted)}

.doc{padding:48px 0 72px}
.doc .wrap{max-width:820px}
.doc .wrap.wide{max-width:var(--w)}
.doc h1{font-size:clamp(1.8rem,4vw,2.6rem)}
.doc h2{font-size:1.4rem;margin-top:2em}
.doc p,.doc li{max-width:none}
.doc ol,.doc ul{padding-left:1.3em}
.doc li{margin-bottom:.4em}
.meta{color:var(--muted);font-size:.93rem}
.callout{border-left:4px solid var(--lamp);background:var(--surface);padding:14px 18px;margin:20px 0;border-radius:0 6px 6px 0}
.keybox{font-family:var(--f-mono);font-size:.85rem;word-break:break-all;background:var(--code-bg);padding:14px;border-radius:6px;user-select:all}

.foot{padding:40px 0 48px;font-size:.92rem;color:var(--muted)}
.foot .wrap{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:32px}
.foot h3{font:600 1rem/1.2 var(--f-head);color:var(--ink);margin-bottom:10px}
.foot ul{list-style:none;padding:0;margin:0}
.foot li{margin-bottom:6px}
.foot a{color:var(--muted)}
.foot a:hover{color:var(--wire)}
.foot .legal{grid-column:1/-1;border-top:1px solid var(--grid);padding-top:18px;font-size:.85rem;max-width:none}
@media (max-width:760px){.foot .wrap{grid-template-columns:1fr}}

.consent{position:fixed;left:12px;right:12px;bottom:calc(12px + env(safe-area-inset-bottom,0px));z-index:40;max-width:620px;margin:0 auto;background:var(--surface);border:1.5px solid var(--ink);border-radius:8px;padding:14px 16px;display:none;gap:12px;align-items:center;font-size:.9rem}
.consent.show{display:flex;flex-wrap:wrap}
.consent p{margin:0;flex:1 1 300px}
[hidden]{display:none!important}
@media (max-width:640px){.tbl table{min-width:560px}}