/* hydrogenfuelfinder.com — "instrument panel" design system. Hand-written, no build step.
   Bump ?v= in partials/head-common.html when this changes. */

@font-face{font-family:"Space Grotesk";src:url(/fonts/space-grotesk-var.woff2) format("woff2");font-weight:300 700;font-display:swap}
@font-face{font-family:"JetBrains Mono";src:url(/fonts/jetbrains-mono-500.woff2) format("woff2");font-weight:500;font-display:swap}
@font-face{font-family:"SG Fallback";src:local(Arial);size-adjust:99%;ascent-override:96%;descent-override:26%}

:root{
  --bg:#0B1020;--panel:#141B33;--panel-2:#1B2442;--line:#2A3560;
  --text:#E6EBFF;--muted:#9AA6D1;
  --cyan:#35E0FF;--amber:#FFB020;
  --online:#3DFF9E;--offline:#FF4D6D;--planned:#8E9BC9;
  --paper:#F4F7FF;--ink:#0B1020;
  --sans:"Space Grotesk","SG Fallback",system-ui,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --max:74rem;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:5rem;-webkit-text-size-adjust:100%;color-scheme:dark}
body{margin:0;font:400 1rem/1.6 var(--sans);color:var(--text);background:var(--bg);
  background-image:linear-gradient(rgba(53,224,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(53,224,255,.035) 1px,transparent 1px);background-size:32px 32px}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--cyan);text-underline-offset:3px}
a:hover{color:#fff}
:focus-visible{outline:2px solid var(--amber);outline-offset:3px;border-radius:2px}
h1,h2,h3{margin:0 0 .5em;line-height:1.1;font-weight:700;letter-spacing:-.02em;color:#fff}
h1{font-size:clamp(2rem,6.2vw,3.6rem)}
h2{font-size:clamp(1.5rem,3.8vw,2.3rem)}
h3{font-size:1.1rem;letter-spacing:0}
p{margin:0 0 1rem}
strong{color:#fff}
.shell{max-width:var(--max);margin:0 auto;padding:0 1rem}
.slim{max-width:54rem}
.intro{font-size:1.0625rem;color:var(--text);max-width:46rem;margin-bottom:1.5rem}
.fine{font-size:.8125rem;color:var(--muted)}
.label{font:500 .6875rem/1.2 var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--cyan)}
.skip-link{position:absolute;left:-999px}.skip-link:focus{left:1rem;top:1rem;z-index:99;background:var(--amber);color:var(--ink);padding:.5rem 1rem}
.vh{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* Top bar */
.topbar{position:sticky;top:0;z-index:50;background:rgba(11,16,32,.94);backdrop-filter:blur(6px);border-bottom:1px solid var(--line)}
.topbar .shell{display:flex;align-items:center;justify-content:space-between;gap:1rem;min-height:3.75rem;flex-wrap:wrap}
.logo{display:flex;align-items:center;gap:.6rem;color:#fff;text-decoration:none;font-weight:700;font-size:1.05rem;letter-spacing:-.01em}
.logo svg{width:2rem;height:2rem;flex:none}
.logo small{display:block;font:500 .5625rem/1 var(--mono);letter-spacing:.16em;color:var(--cyan);text-transform:uppercase;margin-top:.2rem}
.menu-btn{font:500 .75rem/1 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--cyan);background:transparent;border:1px solid var(--cyan);padding:.6rem .8rem;border-radius:3px;cursor:pointer}
.menu-btn[aria-expanded=true]{background:var(--cyan);color:var(--ink)}
.mainnav{display:none;flex-basis:100%;padding-bottom:.75rem}
.mainnav.is-open{display:block}
.mainnav ul{list-style:none;margin:0;padding:0}
.mainnav a{display:block;padding:.7rem .25rem;color:var(--text);text-decoration:none;border-top:1px solid var(--line);font-weight:500}
.mainnav a:hover{color:var(--cyan)}
.mainnav .sub a{padding-left:1.25rem;color:var(--muted);font-size:.9375rem}
@media(min-width:62rem){
  .menu-btn{display:none}
  .mainnav{display:block;flex-basis:auto;padding:0}
  .mainnav>ul{display:flex;align-items:center;gap:.15rem}
  .mainnav li{position:relative}
  .mainnav a{border:0;padding:.5rem .75rem;font-size:.9375rem;border-radius:3px}
  .mainnav .sub{display:none;position:absolute;top:100%;left:0;min-width:13rem;background:var(--panel);border:1px solid var(--line);padding:.35rem;box-shadow:0 12px 30px rgba(0,0,0,.5)}
  .mainnav li:hover>.sub,.mainnav li:focus-within>.sub{display:block}
  .mainnav .sub a{padding:.5rem .7rem}
  .mainnav .go a{border:1px solid var(--cyan);color:var(--cyan);font:500 .75rem/1 var(--mono);letter-spacing:.08em;text-transform:uppercase;padding:.6rem .8rem;margin-left:.5rem}
  .mainnav .go a:hover{background:var(--cyan);color:var(--ink)}
}

/* Ticker */
.ticker{border-bottom:1px solid var(--line);background:var(--panel);font:500 .75rem/1.3 var(--mono);color:var(--muted)}
.ticker .shell{display:flex;flex-wrap:wrap;gap:.35rem 1.25rem;padding-top:.5rem;padding-bottom:.5rem;align-items:center}
.ticker .t-wide{display:none}
@media(min-width:48rem){.ticker .t-wide{display:inline}}
.ticker a{color:var(--muted);text-decoration:none}.ticker a:hover{color:var(--cyan)}
.ticker b{color:#fff;font-weight:500}

/* Status dots */
.dot{display:inline-block;width:.6rem;height:.6rem;border-radius:50%;margin-right:.4rem;vertical-align:baseline;flex:none}
.dot.on{background:var(--online);box-shadow:0 0 0 0 rgba(61,255,158,.6);animation:ping 2.4s infinite}
.dot.off{background:var(--offline)}
.dot.plan{background:transparent;border:2px solid var(--planned)}
.dot.priv{background:var(--line)}
@keyframes ping{70%{box-shadow:0 0 0 .5rem rgba(61,255,158,0)}100%{box-shadow:0 0 0 0 rgba(61,255,158,0)}}
.st{font:500 .75rem/1 var(--mono);letter-spacing:.04em;white-space:nowrap}
.st.on{color:var(--online)}.st.off{color:var(--offline)}.st.plan{color:var(--planned)}

/* Sections */
.deck{padding:2.75rem 0}
.deck-alt{background:var(--panel);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.lead{padding:1rem 0 2.25rem}
.lead h1{margin-bottom:.5rem}
.lead .intro{margin-bottom:.9rem;font-size:.9375rem;line-height:1.45}
.lead h1{font-size:clamp(1.75rem,6.2vw,3.6rem)}
@media(min-width:48rem){.deck{padding:4rem 0}.lead{padding:2.25rem 0 3rem}.lead .intro{font-size:1.125rem}}

/* Readouts */
.readouts{display:grid;grid-template-columns:repeat(3,1fr);gap:.6rem;margin:0 0 1.1rem}
.readouts.four{grid-template-columns:repeat(2,1fr)}
@media(min-width:48rem){.readouts{gap:1rem}.readouts.four{grid-template-columns:repeat(4,1fr)}}
.readout{background:var(--panel);border:1px solid var(--line);border-radius:4px;padding:.7rem .75rem;position:relative;text-decoration:none;color:inherit;display:block}
.deck-alt .readout{background:var(--bg)}
.readout::before,.readout::after{content:"";position:absolute;width:8px;height:8px;border:1px solid var(--cyan);opacity:.7}
.readout::before{top:-1px;left:-1px;border-right:0;border-bottom:0}
.readout::after{bottom:-1px;right:-1px;border-left:0;border-top:0}
.readout .num{font:500 clamp(1.6rem,6vw,2.75rem)/1 var(--mono);color:#fff;display:block;letter-spacing:-.03em}
.readout .num.on{color:var(--online)}.readout .num.off{color:var(--offline)}.readout .num.plan{color:var(--planned)}.readout .num.amb{color:var(--amber)}
.readout .cap{font:500 .625rem/1.3 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--muted);display:block;margin-top:.4rem}
a.readout:hover{border-color:var(--cyan)}
.gauge{height:.6rem;background:var(--panel-2);border:1px solid var(--line);border-radius:2px;overflow:hidden;display:flex;margin:.25rem 0 .4rem}
.gauge i{display:block;height:100%}.gauge .g-on{background:var(--online)}.gauge .g-off{background:var(--offline)}.gauge .g-plan{background:var(--planned);opacity:.55}

/* Buttons + chips */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;font:500 .8125rem/1 var(--mono);letter-spacing:.08em;text-transform:uppercase;padding:.95rem 1.3rem;min-height:3rem;border:1px solid var(--cyan);border-radius:3px;background:transparent;color:var(--cyan);text-decoration:none;cursor:pointer;transition:background .15s,color .15s,box-shadow .15s}
.btn:hover,.btn:focus-visible{background:var(--cyan);color:var(--ink);box-shadow:0 0 22px rgba(53,224,255,.45)}
.btn-solid{background:var(--cyan);color:var(--ink)}.btn-solid:hover{background:#fff;border-color:#fff;color:var(--ink)}
.btn-amber{border-color:var(--amber);color:var(--amber)}.btn-amber:hover,.btn-amber:focus-visible{background:var(--amber);color:var(--ink);box-shadow:0 0 22px rgba(255,176,32,.4)}
.btn-row{display:flex;flex-wrap:wrap;gap:.75rem;margin:1.25rem 0 0}
.chips{display:flex;flex-wrap:wrap;gap:.5rem;list-style:none;margin:0;padding:0}
.chip{display:inline-flex;align-items:center;gap:.4rem;font:500 .75rem/1 var(--mono);padding:.55rem .7rem;border:1px solid var(--line);border-radius:3px;background:var(--panel);color:var(--text);text-decoration:none}
a.chip:hover{border-color:var(--cyan);color:var(--cyan)}
.chip b{color:var(--online);font-weight:500}

/* Panels */
.panel{background:var(--panel);border:1px solid var(--line);border-radius:4px;padding:1.25rem}
.deck-alt .panel{background:var(--bg)}
.panel h3{margin-bottom:.4rem}
a.panel{display:block;color:inherit;text-decoration:none;transition:border-color .15s,transform .15s}
a.panel:hover{border-color:var(--cyan);transform:translateY(-2px)}
a.panel .go{font:500 .75rem/1 var(--mono);color:var(--cyan);letter-spacing:.06em;text-transform:uppercase;margin:.75rem 0 0;display:block}
.panel p:last-child{margin-bottom:0}
.cols{display:grid;gap:1rem}
@media(min-width:40rem){.cols.c2,.cols.c3{grid-template-columns:repeat(2,1fr)}}
@media(min-width:62rem){.cols.c3{grid-template-columns:repeat(3,1fr)}.cols.c4{grid-template-columns:repeat(4,1fr)}.cols.wide-narrow{grid-template-columns:3fr 2fr;gap:2.5rem}}
.note{border:1px solid var(--amber);border-left-width:4px;background:rgba(255,176,32,.07);border-radius:3px;padding:1rem 1.1rem;margin:1.25rem 0}
.note p:last-child{margin:0}.note .label{color:var(--amber);display:block;margin-bottom:.35rem}
.answer{border:1px solid var(--cyan);background:rgba(53,224,255,.06);border-radius:4px;padding:1.1rem 1.2rem;margin:0 0 2rem;font-size:1.0313rem}
.answer p:last-child{margin:0}

/* Locator (light inset so the DOE widget and ads sit naturally) */
.scope{background:var(--paper);border:1px solid var(--cyan);border-radius:6px;padding:.4rem;box-shadow:0 0 0 1px rgba(53,224,255,.15),0 0 40px rgba(53,224,255,.12);contain:layout;margin:0 -.35rem}
/* display:block is load-bearing: the widget's shadow CSS sets :host{all:initial}, and min-height is ignored on the resulting inline box. The widget is 625px tall until its host is 720px wide, then 664px; the breakpoints below are where the host crosses 720px under each .scope padding. */
.scope #afdc-stations{display:block;min-height:625px;position:relative}
@media(min-width:756px){.scope #afdc-stations{min-height:664px}}
.scope-wait{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1rem;color:var(--ink);font:500 .8125rem/1 var(--mono);letter-spacing:.08em;text-transform:uppercase}
.spin{width:2.5rem;height:2.5rem;border:3px solid #C9D3F5;border-top-color:#0B1020;border-radius:50%;animation:rot 1s linear infinite}
@keyframes rot{to{transform:rotate(360deg)}}
.scope-head{display:flex;justify-content:space-between;align-items:center;gap:1rem;margin:0 0 .5rem;flex-wrap:wrap}
@media(min-width:48rem){.scope{padding:.75rem;margin:0}.scope #afdc-stations{min-height:625px}}
@media(min-width:778px){.scope #afdc-stations{min-height:664px}}

/* Ads */
.ad-bay{margin:2rem auto 0;max-width:60rem;min-height:310px;padding:1.25rem .25rem .25rem;position:relative;background:var(--paper);border-radius:4px;overflow:hidden}
.ad-bay::before{content:"Advertisement";position:absolute;top:.3rem;left:0;right:0;text-align:center;font:500 .5625rem/1 var(--mono);letter-spacing:.16em;text-transform:uppercase;color:#5B6690}
@media(min-width:48rem){.ad-bay{min-height:280px}}
.prose .ad-bay{margin-bottom:2rem}

/* Tables */
.tbl{overflow-x:auto;border:1px solid var(--line);border-radius:4px;background:var(--panel);margin:1rem 0 1.5rem}
.deck-alt .tbl{background:var(--bg)}
table{width:100%;border-collapse:collapse;font-size:.875rem;min-width:40rem}
.tbl.tight table{min-width:0}
th,td{text-align:left;padding:.65rem .8rem;border-bottom:1px solid var(--line);vertical-align:top}
thead th{font:500 .625rem/1.2 var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--cyan);background:var(--panel-2);white-space:nowrap}
tbody tr:last-child td{border-bottom:0}
tbody tr:hover{background:rgba(53,224,255,.04)}
td.n,th.n{font-family:var(--mono);text-align:right;white-space:nowrap}
td .sub{display:block;color:var(--muted);font-size:.8125rem}
td.mono{font-family:var(--mono);font-size:.8125rem;white-space:nowrap}
.stale{color:var(--amber)}

/* Timeline */
.timeline{list-style:none;margin:1.5rem 0;padding:0 0 0 1.25rem;border-left:1px solid var(--line)}
.timeline li{position:relative;padding:0 0 1.5rem .75rem}
.timeline li::before{content:"";position:absolute;left:-1.6rem;top:.35rem;width:.65rem;height:.65rem;background:var(--bg);border:2px solid var(--cyan);border-radius:50%}
.timeline li.bad::before{border-color:var(--offline)}.timeline li.good::before{border-color:var(--online)}
.timeline time{font:500 .75rem/1 var(--mono);color:var(--cyan);letter-spacing:.06em;display:block;margin-bottom:.3rem}
.timeline p{margin:0;font-size:.9375rem}.timeline h3{margin-bottom:.25rem}

/* FAQ */
.qa{max-width:54rem}
.qa details{border:1px solid var(--line);border-radius:4px;background:var(--panel);margin-bottom:.6rem}
.deck-alt .qa details{background:var(--bg)}
.qa summary{cursor:pointer;list-style:none;padding:1rem 2.75rem 1rem 1rem;font-weight:600;color:#fff;position:relative}
.qa summary::-webkit-details-marker{display:none}
.qa summary::after{content:"+";position:absolute;right:1rem;top:50%;transform:translateY(-50%);font:500 1.25rem/1 var(--mono);color:var(--cyan)}
.qa details[open] summary::after{content:"−"}
.qa details[open]{border-color:var(--cyan)}
.qa .a{padding:0 1rem 1rem}.qa .a p:last-child{margin:0}

/* Article pages */
.mast{padding:1.75rem 0 2rem;border-bottom:1px solid var(--line);background:linear-gradient(180deg,var(--panel),transparent)}
.mast h1{font-size:clamp(1.9rem,5.4vw,3.1rem);max-width:54rem}
.mast .intro{margin-bottom:.8rem}
.trail{font:500 .6875rem/1.4 var(--mono);letter-spacing:.06em;text-transform:uppercase;margin-bottom:1rem;color:var(--muted)}
.trail a{color:var(--muted)}.trail span{margin:0 .4rem;color:var(--line)}
.by{font-size:.8125rem;color:var(--muted);margin:0}.by a{color:var(--muted)}
.body{padding:2.25rem 0 3rem}
.body>.shell{max-width:56rem}
.prose h2{margin:2.5rem 0 .8rem;font-size:clamp(1.4rem,3.4vw,1.9rem)}
.prose h2:first-child{margin-top:0}
.prose h3{margin:1.75rem 0 .5rem;font-size:1.15rem}
.prose p,.prose li{line-height:1.75}
.prose ul,.prose ol{padding-left:1.3rem;margin:0 0 1.25rem}
.prose li{margin-bottom:.5rem}
.prose figure{margin:1.5rem 0}.prose figure img{border:1px solid var(--line);border-radius:4px;width:100%}
.prose figcaption{font-size:.8125rem;color:var(--muted);margin-top:.5rem}
.contents{border:1px solid var(--line);border-radius:4px;background:var(--panel);padding:1rem 1.2rem;margin:0 0 2rem;font-size:.9375rem}
.contents .label{display:block;margin-bottom:.5rem}
.contents ol{margin:0;padding-left:1.2rem}.contents li{margin:.25rem 0}.contents a{color:var(--text)}
.next{border:1px solid var(--cyan);border-radius:6px;padding:1.4rem;margin:2.5rem 0;display:flex;flex-wrap:wrap;gap:1rem;align-items:center;justify-content:space-between;background:rgba(53,224,255,.05)}
.next h2{margin:0 0 .25rem;font-size:1.4rem}.next p{margin:0;color:var(--muted)}
.more{margin-top:2.5rem}.more h2{font-size:1.35rem}
.sources{font-size:.875rem;color:var(--muted)}.sources li{margin-bottom:.35rem}

/* Calculator console */
.console{display:grid;gap:1.25rem}
@media(min-width:62rem){.console{grid-template-columns:5fr 6fr;align-items:start}}
.field{margin-bottom:1rem}
.field label,.field .lab{display:block;font:500 .6875rem/1.3 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-bottom:.4rem}
.field input[type=number],.field input[type=text],.field input[type=email],.field input[type=url],.field select,.field textarea{width:100%;font:500 1rem/1.3 var(--mono);color:#fff;background:var(--bg);border:1px solid var(--line);border-radius:3px;padding:.75rem .8rem}
.field textarea{font-family:var(--sans);font-weight:400}
.field input:focus,.field select:focus,.field textarea:focus{outline:2px solid var(--cyan);outline-offset:1px;border-color:var(--cyan)}
.field input[type=range]{width:100%;accent-color:var(--cyan)}
.presets{display:flex;flex-wrap:wrap;gap:.4rem;margin-top:.5rem}
.presets button{font:500 .6875rem/1 var(--mono);letter-spacing:.04em;padding:.5rem .6rem;border:1px solid var(--line);border-radius:3px;background:var(--bg);color:var(--text);cursor:pointer}
.presets button:hover,.presets button[aria-pressed=true]{border-color:var(--cyan);color:var(--cyan)}
.check{display:flex;gap:.6rem;align-items:center;font-size:.9375rem;margin:.25rem 0 1rem}
.check input{width:1.1rem;height:1.1rem;accent-color:var(--cyan)}
.versus{display:grid;gap:.6rem;margin-top:1rem}
@media(min-width:40rem){.versus{grid-template-columns:repeat(3,1fr)}}
.versus .readout .num{font-size:1.5rem}
.delta{font:500 .75rem/1.3 var(--mono);display:block;margin-top:.35rem}
.delta.more{color:var(--offline)}.delta.less{color:var(--online)}
.form{max-width:36rem}
.hide{display:none}
.flash{border:1px solid var(--online);background:rgba(61,255,158,.08);border-radius:3px;padding:.9rem 1.1rem;margin-bottom:1.25rem}
.flash.err{border-color:var(--offline);background:rgba(255,77,109,.08)}

/* Footer */
.base{border-top:1px solid var(--line);background:#070B17;padding:2.75rem 0 2rem;color:var(--muted);font-size:.9375rem}
.base .cols{gap:2rem}
@media(min-width:48rem){.base .cols{grid-template-columns:2fr 1fr 1fr 1fr}}
.base h2{font-size:1.15rem;margin-bottom:.6rem}
.base h3{font:500 .6875rem/1 var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--cyan);margin-bottom:.8rem}
.base ul{list-style:none;margin:0;padding:0}.base li{margin-bottom:.45rem}
.base a{color:var(--text);text-decoration:none}.base a:hover{color:var(--cyan)}
.base .legal{border-top:1px solid var(--line);margin-top:2rem;padding-top:1.25rem;font-size:.8125rem}
.jump{position:fixed;right:.9rem;bottom:.9rem;z-index:40;opacity:0;pointer-events:none;transition:opacity .2s;background:var(--bg)}
.jump.is-on{opacity:1;pointer-events:auto}
@media(min-width:62rem){.jump{display:none}}

@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}