/* Voltline, from the "Voltline (charging)" board. */
:root{
  --bg:#FFFFFF; --bg-subtle:#F7F7F5; --line:#E8E8E4; --line-strong:#D4D4CF;
  --ink:#0B0B0C; --ink-2:#3F3F46; --ink-3:#62626B;
  --volt:#22C55E; --volt-ink:#15803D; --volt-tint:#ECFDF3;
  --blue:#2563EB; --blue-tint:#EFF4FF; --orange:#C2410C; --orange-tint:#FFF4ED;
  --ease-out:cubic-bezier(0.23,1,0.32,1);
  --ease-in-out:cubic-bezier(0.77,0,0.175,1);
  --nav-h:64px;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg)}
a{color:var(--ink-2);text-decoration:none}
@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}
[id]{scroll-margin-top:var(--nav-h)}
.vl{font-family:'Geist',system-ui,sans-serif;color:var(--ink);-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent;overflow-x:clip}
.mono{font-family:'Geist Mono',ui-monospace,monospace}
.num{font-variant-numeric:tabular-nums}
.display{letter-spacing:-0.035em;line-height:1.02;font-weight:600}
.h2{letter-spacing:-0.025em;line-height:1.08;font-weight:600;font-size:clamp(30px,4vw,48px);margin:0}
.wrap{max-width:1200px;margin:0 auto;padding-left:clamp(16px,5vw,24px);padding-right:clamp(16px,5vw,24px)}
.kicker{font-family:'Geist Mono',ui-monospace,monospace;font-size:13px;color:var(--volt-ink);margin:0 0 14px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}

/* Buttons: instant press feedback (scale .97 on :active, 160ms ease-out) */
.btn{appearance:none;border:0;cursor:pointer;font:inherit;font-size:15px;font-weight:500;height:44px;padding:0 18px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;gap:8px;user-select:none;touch-action:manipulation;transition:transform 160ms var(--ease-out),background-color 150ms ease,border-color 150ms ease}
.btn:active{transform:scale(0.97)}
.btn-primary{background:var(--ink);color:#fff}
.btn-secondary{background:#fff;color:var(--ink);box-shadow:inset 0 0 0 1px var(--line-strong)}
.btn-sm{height:36px;font-size:14px;padding:0 14px}
@media (pointer:coarse){.btn-sm{height:44px}}
.btn:focus-visible,.tab:focus-visible,.faq-q:focus-visible,.field:focus-visible,.menu-btn:focus-visible,a:focus-visible{outline:2px solid var(--blue);outline-offset:2px}

.band{background:#02025C;color:#fff;font-size:13px}
.band .wrap{padding-top:8px;padding-bottom:8px;display:flex;justify-content:space-between;gap:4px 12px;flex-wrap:wrap}
.band a{color:#fff;text-decoration:underline;text-underline-offset:3px}

/* Sticky translucent nav; below 861px the links move into a menu under the bar */
.nav{position:sticky;top:0;z-index:20;background:rgba(255,255,255,0.78);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);border-bottom:1px solid rgba(0,0,0,0.06)}
@media (prefers-reduced-transparency:reduce){.nav{background:#fff;backdrop-filter:none}}
.nav-bar{height:var(--nav-h);display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);font-weight:600;font-size:17px;letter-spacing:-0.02em}
.navlinks{display:flex;gap:28px;font-size:14px}
.nav-end{display:flex;gap:8px;align-items:center}
.menu-btn{display:none;appearance:none;border:0;background:transparent;width:44px;height:44px;margin-right:-10px;border-radius:10px;align-items:center;justify-content:center;color:var(--ink);cursor:pointer;touch-action:manipulation}
.menu-btn .bars{position:relative;width:18px;height:12px}
.menu-btn .bars span{position:absolute;left:0;right:0;height:2px;border-radius:2px;background:currentColor;transition:transform 200ms var(--ease-out),opacity 150ms ease}
.menu-btn .bars span:nth-child(1){top:0}
.menu-btn .bars span:nth-child(2){top:5px}
.menu-btn .bars span:nth-child(3){top:10px}
.menu-btn[aria-expanded="true"] .bars span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.menu-btn[aria-expanded="true"] .bars span:nth-child(2){opacity:0}
.menu-btn[aria-expanded="true"] .bars span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}
.menu{position:absolute;left:0;right:0;top:100%;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 16px 32px -20px rgba(0,0,0,0.25);transition:opacity 180ms ease,transform 200ms var(--ease-out),visibility 0s linear 0s}
.menu[data-open="false"]{opacity:0;transform:translateY(-6px);visibility:hidden;pointer-events:none;transition:opacity 150ms ease,transform 150ms ease,visibility 0s linear 150ms}
.menu ul{list-style:none;margin:0;padding:8px 0 12px}
.menu li a{display:flex;align-items:center;min-height:48px;font-size:17px;font-weight:500;color:var(--ink);border-bottom:1px solid var(--line)}
.menu li:last-child a{border-bottom:0}
@media (min-width:861px){.menu{display:none}}
@media (max-width:860px){
  .navlinks{display:none}
  .menu-btn{display:inline-flex}
}

/* Hero entrance: one-time stagger, 60ms apart */
@keyframes rise{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.rise{animation:rise 520ms var(--ease-out) both;animation-delay:var(--d,0ms)}
.hero{padding-top:clamp(48px,8vw,88px);padding-bottom:clamp(56px,7vw,72px);display:flex;flex-wrap:wrap;gap:clamp(40px,5vw,56px);align-items:center}
.hero h1{font-size:clamp(40px,6vw,72px);margin:22px 0 0}
.badge{display:inline-flex;align-items:center;gap:8px;min-height:30px;padding:4px 12px 4px 6px;border-radius:999px;box-shadow:inset 0 0 0 1px var(--line);font-size:13px;line-height:1.35;color:var(--ink-2)}

/* Scroll reveal: fires once via IntersectionObserver; content is visible if JS never runs */
.js-reveal [data-reveal]{opacity:0;transform:translateY(14px);transition:opacity 600ms var(--ease-out),transform 600ms var(--ease-out);transition-delay:var(--d,0ms)}
.js-reveal [data-reveal][data-visible]{opacity:1;transform:none}

/* Live OCPP log: new rows enter with @starting-style (interruptible transition, not keyframes) */
.term{border-radius:16px;background:#0B0B0C;color:#E7E7E4;box-shadow:0 1px 0 rgba(255,255,255,0.06) inset,0 24px 48px -24px rgba(0,0,0,0.35);overflow:hidden}
.term-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 16px;border-bottom:1px solid rgba(255,255,255,0.08)}
.log{list-style:none;margin:0;padding:12px 8px;height:292px;overflow:hidden;display:flex;flex-direction:column;gap:2px}
.logrow{display:grid;grid-template-columns:64px 18px minmax(0,1fr);gap:8px;align-items:baseline;padding:7px 8px;border-radius:8px;font-size:12.5px;line-height:1.4;flex:none;opacity:1;transform:none;transition:opacity 260ms var(--ease-out),transform 260ms var(--ease-out)}
.logrow .msg{min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
@starting-style{.logrow{opacity:0;transform:translateY(6px)}}
.term-stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border-top:1px solid rgba(255,255,255,0.08)}
.term-stats>div{padding:14px 16px}
.term-stats>div+div{border-left:1px solid rgba(255,255,255,0.08)}
.term-stats .v{font-size:20px;font-weight:600;color:#fff;margin-top:4px}
@media (max-width:420px){
  .logrow{grid-template-columns:58px 14px minmax(0,1fr);gap:6px;font-size:12px}
  .term-stats>div{padding:12px}
  .term-stats .v{font-size:17px}
}

.pill{display:inline-flex;align-items:center;gap:6px;height:24px;padding:0 10px;border-radius:999px;font-size:12px;font-weight:500}
.dot{width:6px;height:6px;border-radius:50%}
.proto{background:#fff;box-shadow:inset 0 0 0 1px var(--line);color:var(--ink);height:30px;font-size:13px}

/* Tabs: duplicated active list revealed with clip-path, so bg + text change in perfect sync */
.tabs{position:relative;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));background:var(--bg-subtle);border-radius:12px;padding:4px;box-shadow:inset 0 0 0 1px var(--line)}
.tab{appearance:none;border:0;background:transparent;font:inherit;font-size:14px;font-weight:500;color:var(--ink-3);height:40px;border-radius:9px;cursor:pointer;touch-action:manipulation;padding:0 4px}
.tabs-on{position:absolute;inset:4px;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));pointer-events:none;clip-path:inset(0 calc((3 - var(--i,0)) * 25%) 0 calc(var(--i,0) * 25%) round 9px);transition:clip-path 300ms var(--ease-in-out)}
.tabs-on span{display:flex;align-items:center;justify-content:center;height:40px;border-radius:9px;background:var(--ink);color:#fff;font-size:14px;font-weight:500}

/* Panel crossfade masked with a 2px blur (the blur hides the two-state overlap) */
.panels{display:grid;grid-template-columns:minmax(0,1fr);margin-top:16px}
.panel{grid-area:1/1;min-width:0;display:flex;flex-wrap:wrap;gap:clamp(20px,3vw,32px);padding:clamp(20px,3.5vw,32px);border-radius:16px;box-shadow:inset 0 0 0 1px var(--line);background:#fff;transition:opacity 220ms ease,filter 220ms ease,transform 220ms var(--ease-out)}
.panel[data-on="false"]{opacity:0;filter:blur(2px);transform:translateY(4px);pointer-events:none;visibility:hidden;transition:opacity 220ms ease,filter 220ms ease,transform 220ms var(--ease-out),visibility 0s linear 220ms}
.panel h3{font-size:22px;letter-spacing:-0.015em;margin:0}
.panel .copy{flex:1 1 300px;min-width:0}
.panel .copy p{font-size:16px;line-height:1.6;color:var(--ink-2);margin:12px 0 0}
.code{flex:1 1 420px;min-width:0;margin:0;padding:20px;border-radius:12px;background:var(--bg-subtle);font-size:13px;line-height:1.7;overflow-x:auto;color:var(--ink)}
.profile{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:4px 16px;padding:16px 18px;border-radius:12px;background:var(--bg-subtle)}
@media (max-width:480px){.code{padding:16px;font-size:12px}}

.grid3{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(300px,100%),1fr));gap:16px;margin-top:48px}
.card-h{transition:border-color 150ms ease}
.feature{padding:28px;border-radius:16px;border:1px solid var(--line);background:#fff}
.feature h3{font-size:18px;letter-spacing:-0.01em;margin:20px 0 0}
.feature p{font-size:15px;line-height:1.6;color:var(--ink-2);margin:8px 0 0}
.icon-tile{width:40px;height:40px;border-radius:10px;background:var(--bg-subtle);display:flex;align-items:center;justify-content:center;box-shadow:inset 0 0 0 1px var(--line)}

.stats{flex:1 1 420px;min-width:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(min(180px,100%),1fr));gap:1px;background:rgba(255,255,255,0.1);border-radius:16px;overflow:hidden;align-self:center}
.stats>div{background:#0B0B0C;padding:clamp(24px,3vw,32px) 28px}
.stats .big{font-size:clamp(40px,5vw,48px)}
.stats p{font-size:14px;color:#A1A1AA;margin:10px 0 0;line-height:1.5}
.checks{list-style:none;padding:0;margin:32px 0 0;display:flex;flex-direction:column;gap:14px;font-size:15px;line-height:1.5;color:#E4E4E7}
.checks li{display:flex;gap:12px;align-items:flex-start}

.surface{border:1px solid var(--line);border-radius:16px;overflow:hidden;background:#fff}
.surface .art{height:200px;background:var(--bg-subtle);border-bottom:1px solid var(--line)}
.surface .txt{padding:24px 28px 28px}
.surface h3{font-size:18px;margin:0}
.surface p{font-size:15px;line-height:1.6;color:var(--ink-2);margin:8px 0 0}

/* FAQ: grid-rows 0fr -> 1fr, short so layout cost stays small */
.faq-a{display:grid;grid-template-rows:0fr;opacity:0;transition:grid-template-rows 250ms var(--ease-out),opacity 200ms ease}
.faq-a[data-open="true"]{grid-template-rows:1fr;opacity:1}
.faq-a p{margin:0;padding:0 40px 24px 0;font-size:16px;line-height:1.65;color:var(--ink-2)}
.faq-q{appearance:none;border:0;background:none;font:inherit;width:100%;text-align:left;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:22px 0;font-size:17px;font-weight:500;line-height:1.4;color:var(--ink-2)}
.chev{transition:transform 200ms var(--ease-out)}
.chev[data-open="true"]{transform:rotate(45deg)}
@media (max-width:480px){.faq-q{font-size:16px;padding:18px 0}.faq-a p{padding-right:8px}}

/* CTA button morph: fixed width, label crossfades with blur */
.cta-box{border-radius:24px;background:var(--bg-subtle);box-shadow:inset 0 0 0 1px var(--line);padding:clamp(24px,6vw,72px);display:flex;flex-wrap:wrap;gap:32px;align-items:center;justify-content:space-between}
.cta-form{display:flex;flex-wrap:wrap;gap:10px}
.morph{position:relative;min-width:168px}
.morph .lbl{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;gap:8px;transition:opacity 200ms ease,filter 200ms ease,transform 200ms var(--ease-out)}
.morph .lbl[data-on="false"]{opacity:0;filter:blur(2px);transform:translateY(4px)}
@keyframes spin{to{transform:rotate(360deg)}}
.spinner{width:16px;height:16px;border-radius:50%;border:2px solid rgba(255,255,255,0.35);border-top-color:#fff;animation:spin 600ms linear infinite}
.field{height:44px;border-radius:10px;border:0;box-shadow:inset 0 0 0 1px var(--line-strong);padding:0 14px;font:inherit;font-size:16px;color:var(--ink);background:#fff;min-width:0}
.field:disabled{opacity:0.6}
.form-status{margin:0;font-size:14px;color:var(--ink)}
.form-status:empty{display:none}
@media (max-width:560px){.cta-form .btn{flex:1 1 100%}}

.foot{border-top:1px solid var(--line)}
.foot .wrap{padding-top:40px;padding-bottom:40px;display:flex;flex-wrap:wrap;gap:16px 24px;justify-content:space-between;align-items:center;font-size:14px;color:var(--ink-3)}
.foot-links{display:flex;flex-wrap:wrap;gap:4px 24px}
.foot-links a{display:inline-flex;align-items:center;min-height:36px}

@media (hover:hover) and (pointer:fine){
  a:hover{color:var(--ink)}
  .btn-primary:hover{background:#2A2A2E;color:#fff}
  .btn-secondary:hover{background:var(--bg-subtle)}
  .card-h:hover{border-color:var(--line-strong)}
  .faq-q:hover{color:var(--ink)}
  .band a:hover{color:#fff}
}
@media (max-width:860px){
  .hide-sm{display:none !important}
  .tab,.tabs-on span{font-size:12.5px}
}
@media (max-width:380px){
  .tab{padding:0}
  .tab,.tabs-on span{font-size:11.5px;letter-spacing:-0.01em}
}
@media (prefers-reduced-motion:reduce){
  .rise{animation:none}
  .js-reveal [data-reveal]{transform:none;transition:opacity 300ms ease}
  .logrow,.panel,.morph .lbl{transform:none !important}
  .tabs-on{transition:none}
}