/* FuelMetric Pro — fuelmetric.sanaurlabs.com
   Idea: the page is a set of engineering drawing sheets. One memorable moment:
   the tank drawing in the hero fills to its level, and the title block gives the result. */

@font-face{font-family:"Plex";src:url("fonts/IBMPlexSans-Regular.woff") format("woff");font-weight:400;font-display:swap}
@font-face{font-family:"Plex";src:url("fonts/IBMPlexSans-SemiBold.woff") format("woff");font-weight:600;font-display:swap}
@font-face{font-family:"Plex";src:url("fonts/IBMPlexSans-Bold.woff") format("woff");font-weight:700;font-display:swap}
@font-face{font-family:"Plex Mono";src:url("fonts/IBMPlexMono-Medium.woff") format("woff");font-weight:500;font-display:swap}

:root{
  --ink:#15233B;        /* navy: text, linework */
  --ink-soft:#46546D;   /* secondary text */
  --rule:#C5CEDA;       /* drawing lines, table rules */
  --rule-soft:#E2E7EE;
  --page:#E9EDF2;       /* drafting-table grey around the sheets */
  --sheet:#FFFFFF;
  --brass:#E0B04A;      /* the liquid; the measured figure on navy */
  --brass-deep:#C9973A;
  --brass-ink:#7A5712;  /* brass text on white (AA) */
  --focus:#1F6FD1;
  --mono:"Plex Mono",ui-monospace,Menlo,Consolas,monospace;
  --sans:"Plex",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --wrap:1180px;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--page);color:var(--ink);font-family:var(--sans);font-size:18px;line-height:1.6;
  font-feature-settings:"kern","liga";text-rendering:optimizeLegibility}
img,svg{display:block;max-width:100%}
a{color:inherit}
:focus-visible{outline:3px solid var(--focus);outline-offset:3px;border-radius:4px}
.skip{position:absolute;left:-9999px;top:8px;background:var(--ink);color:#fff;padding:10px 14px;border-radius:6px;z-index:10}
.skip:focus{left:12px}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
.num{font-family:var(--mono);font-weight:500;font-variant-numeric:tabular-nums;letter-spacing:-.01em}

/* ---------- header ---------- */
.top{padding:22px 0}
.top .wrap{display:flex;align-items:center;gap:28px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;font-weight:700;font-size:19px;letter-spacing:-.01em}
.brand img{width:38px;height:38px;border-radius:9px}
.nav{display:flex;gap:26px;margin-left:auto;font-size:16px;font-weight:600}
.nav a{text-decoration:none;color:var(--ink-soft)}
.nav a:hover{color:var(--ink)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:48px;padding:0 22px;border-radius:10px;
  font:600 17px/1 var(--sans);text-decoration:none;border:2px solid var(--ink);transition:background .15s,color .15s}
.btn-solid{background:var(--ink);color:#fff}
.btn-solid:hover{background:#0C1628}
.btn-line{background:transparent;color:var(--ink)}
.btn-line:hover{background:var(--ink);color:#fff}
.top .btn{min-height:42px;padding:0 18px;font-size:16px}

/* ---------- sheets ---------- */
.sheet{background:var(--sheet);border:1.5px solid var(--ink);position:relative}
.sheet + .sheet{margin-top:28px}
.section{padding:84px 0 0}
.section:last-of-type{padding-bottom:84px}
h1,h2,h3{margin:0;letter-spacing:-.018em;line-height:1.08;font-weight:700}
h1{font-size:clamp(38px,4.5vw,60px);max-width:13em}
h2{font-size:clamp(30px,3.7vw,46px);max-width:15em}
h3{font-size:22px;line-height:1.3;letter-spacing:-.01em;font-weight:600}
p{margin:0}
.lead{font-size:21px;line-height:1.55;color:var(--ink-soft);max-width:33em}
.prose{max-width:36em;color:var(--ink-soft)}
.prose p + p{margin-top:16px}

/* ---------- hero sheet with drawing zones ---------- */
.hero{margin-top:6px;display:grid;grid-template-columns:22px 1fr;grid-template-rows:22px 1fr}
.zones-x,.zones-y{display:flex;font:500 11px/1 var(--mono);color:#8A96A8}
.zones-x{grid-column:2;border-bottom:1px solid var(--rule)}
.zones-y{grid-row:2;flex-direction:column;border-right:1px solid var(--rule)}
.zones-x span,.zones-y span{flex:1;display:flex;align-items:center;justify-content:center}
.zones-x span + span{border-left:1px solid var(--rule-soft)}
.zones-y span + span{border-top:1px solid var(--rule-soft)}
.corner{border-right:1px solid var(--rule);border-bottom:1px solid var(--rule)}
.hero-body{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:24px;padding:58px 48px 40px 52px;position:relative}
.hero-copy{padding-top:18px}
.hero-copy .lead{margin-top:26px}
.cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.status{margin-top:20px;font-size:15.5px;color:var(--ink-soft);max-width:30em}
.status strong{color:var(--ink);font-weight:600}

.drawing{position:relative;align-self:end}
.drawing svg{width:100%;height:auto}
.tank-line{fill:none;stroke:var(--ink);stroke-width:2}
.thin{fill:none;stroke:var(--ink);stroke-width:1}
.dash{fill:none;stroke:var(--ink-soft);stroke-width:1.2;stroke-dasharray:5 5}
.liquid{fill:var(--brass)}
.surface{stroke:var(--brass-ink);stroke-width:1.6}
.d-label{font:400 13px var(--sans);fill:var(--ink-soft)}
.d-value{font:500 17px var(--mono);fill:var(--ink)}
.d-small{font:500 12px var(--mono);fill:#8A96A8}

/* title block: the result of the drawing */
.titleblock{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr) minmax(0,1.2fr);gap:1px;background:var(--ink);border:1.5px solid var(--ink);margin-top:6px}
.titleblock > div{background:#fff;padding:9px 13px}
.titleblock .span2,.titleblock .net{grid-column:span 2}
.titleblock .k{display:block;font-size:12.5px;color:var(--ink-soft);line-height:1.3}
.titleblock .v{display:block;font-size:15.5px;margin-top:3px;line-height:1.2;white-space:nowrap}
.titleblock .result{grid-column:1 / -1;background:var(--ink);color:#fff;display:flex;align-items:baseline;justify-content:space-between;gap:24px;padding:12px 16px}
.titleblock .result .k{color:#C8D0DE;font-size:14px}
.titleblock .result .v{font-size:30px;color:var(--brass);margin:0}
.titleblock .result .v small{font:600 15px var(--sans);color:#C8D0DE;margin-left:6px}

/* one orchestrated load moment */
@media (prefers-reduced-motion:no-preference){
  .liquid,.surface,.levelmark{transform-box:fill-box;transform-origin:50% 100%}
  .liquid{animation:fill 1.7s cubic-bezier(.3,.7,.2,1) .25s both}
  .rise{animation:rise 1.7s cubic-bezier(.3,.7,.2,1) .25s both}
  .after{animation:show .5s ease-out 1.8s both}
  .titleblock .result .v{animation:show .6s ease-out 2.15s both}
}
@keyframes fill{from{transform:scaleY(0)}to{transform:scaleY(1)}}
@keyframes rise{from{transform:translateY(202px);opacity:0}20%{opacity:1}to{transform:translateY(0)}}
@keyframes show{from{opacity:0}to{opacity:1}}

/* ---------- accuracy ---------- */
.two{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.08fr);gap:56px;align-items:start}
.two h2 + .prose{margin-top:24px}
.calc{border:1.5px solid var(--ink);background:#fff}
.calc caption{caption-side:bottom;text-align:left;font-size:14.5px;color:var(--ink-soft);padding:12px 2px 0}
table{border-collapse:collapse;width:100%}
.calc th,.calc td{padding:13px 16px;border-bottom:1px solid var(--rule-soft);text-align:left;vertical-align:baseline}
.calc th{font-weight:400;color:var(--ink-soft);font-size:16px;width:30%}
.calc td.num{font-size:18px;text-align:right;white-space:nowrap}
.calc td.note{font-size:14.5px;color:var(--ink-soft);white-space:nowrap}
.calc tr.step th{color:var(--ink);font-weight:600}
.calc tr.total th,.calc tr.total td{border-bottom:0;background:var(--ink);color:#fff}
.calc tr.total td.num{color:var(--brass);font-size:24px}
.calc tr.total td.note{color:#C8D0DE}

.checks{margin-top:44px}
.checks th,.checks td{padding:14px 0;border-top:1px solid var(--rule);text-align:left;vertical-align:baseline}
.checks td.num{text-align:right;font-size:26px;padding-left:20px;white-space:nowrap}
.checks th{font-weight:400;color:var(--ink-soft);font-size:17px}
.checks th b{color:var(--ink);font-weight:600}

/* ---------- routine (a real sequence) ---------- */
.routine-head{display:flex;justify-content:space-between;align-items:end;gap:40px}
.routine-head .prose{max-width:26em}
.steps{list-style:none;margin:48px 0 0;padding:0;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:28px;counter-reset:step}
.steps li{counter-increment:step}
.phone{border:9px solid var(--ink);border-radius:30px;overflow:hidden;background:var(--ink);aspect-ratio:390/700;box-shadow:0 1px 0 var(--ink)}
.phone img{width:100%;height:100%;object-fit:cover;object-position:top}
.steps h3{margin-top:22px;display:flex;gap:12px;align-items:baseline}
.steps h3::before{content:counter(step);font:500 15px var(--mono);color:var(--brass-ink);border:1.5px solid var(--brass-deep);border-radius:50%;width:28px;height:28px;flex:none;display:inline-flex;align-items:center;justify-content:center;transform:translateY(-2px)}
.steps p{margin-top:8px;font-size:16.5px;color:var(--ink-soft)}
.charts-note{margin-top:40px;padding:22px 26px;border:1.5px dashed var(--rule);display:flex;gap:18px;align-items:flex-start;max-width:52em}
.charts-note svg{flex:none;margin-top:3px}
.charts-note p{font-size:16.5px;color:var(--ink-soft)}
.charts-note b{color:var(--ink)}

/* ---------- receipt spotlight ---------- */
.receipt{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:56px;align-items:center}
.formd{border:1.5px solid var(--ink);background:#fff}
.formd .head{display:flex;justify-content:space-between;gap:16px;padding:14px 18px;border-bottom:1.5px solid var(--ink);font-size:15px;color:var(--ink-soft)}
.formd .head strong{color:var(--ink);font-weight:700;font-size:17px}
.formd dl{margin:0;display:grid;grid-template-columns:1fr auto}
.formd dt,.formd dd{margin:0;padding:15px 18px;border-bottom:1px solid var(--rule-soft)}
.formd dt{color:var(--ink-soft);font-size:16px}
.formd dd{text-align:right;font-size:20px}
.formd .diff{display:contents}
.prose.gap{margin-top:24px}
.formd .diff dt,.formd .diff dd{background:var(--ink);color:#fff;border-bottom:0}
.formd .diff dd{color:var(--brass);font-size:26px}
.formd .diff dt{color:#C8D0DE}
.formd .diff dd small{display:block;font:500 15px var(--mono);color:#C8D0DE;margin-top:2px}

/* ---------- private ---------- */
.private{background:var(--ink);color:#fff;border-color:var(--ink)}
.private .inner{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:56px;padding:64px 56px}
.private h2{color:#fff}
.private .prose{color:#C8D0DE;margin-top:22px}
.nolist{list-style:none;margin:0;padding:0;border-top:1px solid #34466A}
.nolist li{padding:16px 0;border-bottom:1px solid #34466A;display:flex;gap:14px;font-size:18px}
.nolist li span{color:#C8D0DE;display:block;font-size:15.5px}
.nolist svg{flex:none;margin-top:5px}

/* ---------- pricing ---------- */
.plans{margin-top:44px;border:1.5px solid var(--ink);background:#fff}
.plans th,.plans td{padding:14px 18px;border-bottom:1px solid var(--rule-soft);text-align:left;font-size:16.5px}
.plans thead th{border-bottom:1.5px solid var(--ink);font-size:20px;font-weight:700;padding-top:22px}
.plans thead th small{display:block;font-weight:400;font-size:15px;color:var(--ink-soft);margin-top:4px}
.plans td,.plans thead th + th{text-align:center;width:22%}
.plans tbody th{font-weight:400;color:var(--ink-soft)}
.plans .yes{color:var(--ink)}
.plans .no{color:#9AA5B5}
.prices{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border-top:1.5px solid var(--ink)}
.prices > div{padding:22px 22px 24px;border-right:1px solid var(--rule)}
.prices > div:last-child{border-right:0}
.prices .k{font-weight:600;font-size:17px}
.prices .k span{font-weight:400;color:var(--ink-soft);font-size:15px;display:block}
.prices .v{font:700 34px/1.1 var(--sans);font-variant-numeric:tabular-nums;margin-top:10px;letter-spacing:-.01em}
.prices .usd{font-size:15px;color:var(--ink-soft);margin-top:6px}
.prices .best{background:#FBF6EA}
.badge{font:600 12.5px/1 var(--sans);font-style:normal;color:var(--brass-ink);border:1px solid var(--brass-deep);border-radius:20px;padding:3px 9px;margin-left:8px;vertical-align:2px}
.fineprint{margin-top:16px;font-size:15px;color:var(--ink-soft);max-width:52em}

/* ---------- maker ---------- */
.maker{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:56px}
.maker blockquote{margin:0;font-size:22px;line-height:1.55;color:var(--ink)}
.maker blockquote p + p{margin-top:18px}
.maker cite{display:block;margin-top:22px;font-style:normal;font-size:16px;color:var(--ink-soft)}

/* ---------- FAQ ---------- */
.faq{margin-top:36px;border-top:1.5px solid var(--ink)}
.faq details{border-bottom:1px solid var(--rule)}
.faq summary{cursor:pointer;list-style:none;padding:20px 44px 20px 0;font-size:19px;font-weight:600;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"";position:absolute;right:8px;top:50%;width:12px;height:12px;border-right:2px solid var(--ink);border-bottom:2px solid var(--ink);transform:translateY(-70%) rotate(45deg);transition:transform .2s}
.faq details[open] summary::after{transform:translateY(-30%) rotate(-135deg)}
.faq details p{padding:0 0 22px;color:var(--ink-soft);max-width:44em}

/* ---------- final call + footer ---------- */
.final{display:flex;justify-content:space-between;align-items:center;gap:32px;padding:44px 48px}
.final p{color:var(--ink-soft);margin-top:10px}
footer{background:var(--ink);color:#C8D0DE;padding:48px 0 36px;font-size:15.5px}
footer .wrap{display:grid;grid-template-columns:1.2fr 1fr;gap:40px}
footer .made{display:flex;gap:16px;align-items:center}
footer .made img{width:48px;height:48px}
footer .made b{color:#fff;font-size:17px;display:block}
footer nav{display:flex;flex-wrap:wrap;gap:10px 26px;justify-content:flex-end;align-self:center}
footer nav a{color:#fff;text-decoration:none}
footer nav a:hover{text-decoration:underline}
footer .legal{grid-column:1 / -1;border-top:1px solid #34466A;padding-top:22px;font-size:13.5px;color:#9AA7BD;max-width:none}

/* ---------- document pages (privacy, terms) ---------- */
.doc{padding:56px 64px 64px}
.doc h1{font-size:clamp(34px,4vw,48px)}
.doc .eff{margin-top:12px;color:var(--ink-soft)}
.doc h2{font-size:22px;margin-top:34px;letter-spacing:-.01em}
.doc p,.doc li{max-width:40em;color:#2B3850;margin-top:10px}
.doc ol{padding-left:22px}

/* ---------- responsive ---------- */
@media (max-width:1020px){
  .nav{display:none}
  .top .btn{margin-left:auto}
  .hero-body{grid-template-columns:1fr;padding:40px 32px 32px}
  .drawing{max-width:560px;margin:8px auto 0;width:100%}
  .two,.receipt,.maker,.private .inner{grid-template-columns:1fr;gap:40px}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr))}
  .routine-head{flex-direction:column;align-items:flex-start;gap:20px}
}
@media (max-width:640px){
  body{font-size:17px}
  .wrap{padding:0 16px}
  .top .brand span{display:none}
  .hero{grid-template-columns:1fr;grid-template-rows:auto}
  .zones-x,.zones-y,.corner{display:none}
  .hero-body{padding:30px 20px 22px}
  .lead{font-size:19px}
  .cta .btn{flex:1 1 100%}
  .section{padding-top:64px}
  .titleblock{grid-template-columns:1fr 1fr}
  .titleblock .span2{grid-column:1 / -1}
  .titleblock .net{grid-column:auto}
  .d-label{font-size:17px}
  .d-value{font-size:21px}
  .d-small{display:none}
  .plans thead th small{display:none}
  .maker blockquote{font-size:19px}
  .titleblock .result .v{font-size:26px}
  .steps{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;gap:18px;margin-right:-16px;padding:0 16px 10px 0}
  .steps li{flex:0 0 74%;scroll-snap-align:start}
  .calc th,.calc td{padding:11px 12px}
  .calc td.note{display:none}
  .private .inner{padding:44px 22px}
  .plans th,.plans td{padding:12px 10px;font-size:15px}
  .plans thead th{font-size:17px}
  .prices{grid-template-columns:1fr}
  .prices > div{border-right:0;border-bottom:1px solid var(--rule)}
  .final{flex-direction:column;align-items:flex-start;padding:32px 22px}
  footer .wrap{grid-template-columns:1fr}
  footer nav{justify-content:flex-start}
  .doc{padding:36px 22px 44px}
}