/* SEMESTA.EV — public website styles */
@font-face { font-family: 'Space Grotesk'; src: url(../fonts/space-grotesk-latin-500-normal.woff2) format('woff2'); font-weight: 500; font-display: swap; }
@font-face { font-family: 'Space Grotesk'; src: url(../fonts/space-grotesk-latin-600-normal.woff2) format('woff2'); font-weight: 600; font-display: swap; }
@font-face { font-family: 'Space Grotesk'; src: url(../fonts/space-grotesk-latin-700-normal.woff2) format('woff2'); font-weight: 700; font-display: swap; }
@font-face { font-family: 'Inter'; src: url(../fonts/inter-latin-400-normal.woff2) format('woff2'); font-weight: 400; font-display: swap; }
@font-face { font-family: 'Inter'; src: url(../fonts/inter-latin-500-normal.woff2) format('woff2'); font-weight: 500; font-display: swap; }
@font-face { font-family: 'Inter'; src: url(../fonts/inter-latin-600-normal.woff2) format('woff2'); font-weight: 600; font-display: swap; }

:root {
  --c-950: #0b0d0f; --c-900: #111417; --c-850: #15191c; --c-800: #1a1e22; --c-700: #252a2f; --c-600: #343a40; --c-500: #4a525a;
  --text: #e8ecef; --muted: #96a2ac; --faint: #66727c;
  --volt: #2bff88; --volt-600: #1fcf72; --volt-ink: #04170c; --volt-glow: rgba(43, 255, 136, .35);
  --danger: #ff5a6a; --warn: #ffc542;
  --radius: 14px; --radius-lg: 22px;
  --font-display: 'Space Grotesk', ui-sans-serif, system-ui, sans-serif;
  --font-body: 'Inter', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', sans-serif;
  --gutter: clamp(16px, 4vw, 56px);
  --maxw: 1240px;
  --ease: cubic-bezier(.2, .7, .1, 1);
  --header-h: 68px;
  color-scheme: dark;
}
@view-transition { navigation: auto; }

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--c-950); color: var(--text); font: 400 16px/1.6 var(--font-body); -webkit-font-smoothing: antialiased; overflow-x: hidden; }
img, svg, canvas { display: block; max-width: 100%; }
a { color: inherit; }
button { font: inherit; color: inherit; }
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 600; letter-spacing: -0.02em; line-height: 1.08; margin: 0; }
p { margin: 0; }
:focus-visible { outline: 2px solid var(--volt); outline-offset: 3px; border-radius: 6px; }
.sr-only { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.skip { position: fixed; left: 16px; top: -60px; z-index: 200; background: var(--volt); color: var(--volt-ink); padding: 10px 16px; border-radius: 10px; font-weight: 600; transition: top .2s; }
.skip:focus { top: 12px; }
.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 var(--gutter); }

/* ---------- buttons ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: 48px; padding: 0 22px; border-radius: 999px; border: 1px solid transparent; font-weight: 600; font-size: 15px; text-decoration: none; cursor: pointer; transition: transform .25s var(--ease), background .25s, border-color .25s, box-shadow .25s; white-space: nowrap; }
.btn svg { width: 18px; height: 18px; }
.btn--volt { background: var(--volt); color: var(--volt-ink); box-shadow: 0 0 0 0 var(--volt-glow); }
.btn--volt:hover { transform: translateY(-1px); box-shadow: 0 10px 40px -8px var(--volt-glow); }
.btn--ghost { border-color: rgba(255,255,255,.18); background: rgba(255,255,255,.03); backdrop-filter: blur(8px); }
.btn--ghost:hover { border-color: rgba(255,255,255,.4); background: rgba(255,255,255,.07); }
.btn--sm { min-height: 40px; padding: 0 16px; font-size: 14px; }
.icon-btn { width: 44px; height: 44px; display: inline-grid; place-items: center; border-radius: 12px; border: 1px solid rgba(255,255,255,.12); background: rgba(17,20,23,.72); backdrop-filter: blur(10px); cursor: pointer; transition: background .2s, border-color .2s; }
.icon-btn:hover { background: rgba(37,42,47,.9); border-color: rgba(255,255,255,.28); }
.icon-btn[aria-pressed="true"] { border-color: var(--volt); color: var(--volt); }
.icon-btn svg { width: 20px; height: 20px; }

/* ---------- header ---------- */
.header { position: fixed; inset: 0 0 auto 0; z-index: 50; height: var(--header-h); display: flex; align-items: center; transition: background .35s, border-color .35s, transform .35s var(--ease); border-bottom: 1px solid transparent; }
.header.is-solid { background: rgba(11,13,15,.82); backdrop-filter: blur(14px) saturate(140%); border-bottom-color: rgba(255,255,255,.06); }
.header .wrap { display: flex; align-items: center; gap: 28px; max-width: 1400px; }
.logo { display: inline-flex; align-items: baseline; font: 700 21px/1 var(--font-display); letter-spacing: .02em; text-decoration: none; }
.logo b { color: var(--volt); font-weight: 700; }
.logo__mark { width: 26px; height: 26px; margin-right: 10px; align-self: center; }
.nav { display: flex; gap: 4px; margin-left: auto; }
.nav a { position: relative; padding: 10px 12px; font-size: 13px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; text-decoration: none; color: var(--muted); transition: color .2s; }
.nav a:hover, .nav a[aria-current="true"] { color: var(--text); }
.nav a::after { content: ''; position: absolute; left: 12px; right: 12px; bottom: 4px; height: 2px; background: var(--volt); transform: scaleX(0); transform-origin: left; transition: transform .35s var(--ease); }
.nav a[aria-current="true"]::after, .nav a:hover::after { transform: scaleX(1); }
.menu-btn { display: none; margin-left: auto; }
@media (max-width: 1080px) {
  .nav { position: fixed; inset: var(--header-h) 0 auto 0; flex-direction: column; gap: 0; padding: 12px var(--gutter) 28px; background: rgba(11,13,15,.97); backdrop-filter: blur(14px); border-bottom: 1px solid rgba(255,255,255,.06); transform: translateY(-12px); opacity: 0; visibility: hidden; transition: .3s var(--ease); }
  .nav.is-open { transform: none; opacity: 1; visibility: visible; }
  .nav a { padding: 16px 0; font-size: 15px; border-bottom: 1px solid rgba(255,255,255,.06); }
  .nav a::after { display: none; }
  .menu-btn { display: inline-grid; }
  .header__cta { display: none; }
}

/* ---------- page transition curtain ---------- */
.curtain { position: fixed; inset: 0; z-index: 300; pointer-events: none; background: var(--c-950); display: grid; place-items: center; transform-origin: bottom; }
.curtain__logo { font: 700 28px var(--font-display); letter-spacing: .04em; opacity: .9; }
.curtain__logo b { color: var(--volt); }
.curtain__bar { position: absolute; left: 0; bottom: 0; height: 2px; width: 100%; background: var(--volt); transform-origin: left; }

/* ---------- hero ---------- */
.hero { position: relative; height: 100vh; height: 100svh; min-height: 560px; overflow: hidden; background:
  radial-gradient(1200px 600px at 70% 62%, rgba(43,255,136,.08), transparent 60%),
  radial-gradient(900px 500px at 15% 10%, rgba(80,120,160,.10), transparent 60%),
  linear-gradient(180deg, #0d1013 0%, #0b0d0f 100%); }
.hero__grid { position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px); background-size: 64px 64px; mask-image: radial-gradient(ellipse at 60% 60%, #000 0%, transparent 70%); -webkit-mask-image: radial-gradient(ellipse at 60% 60%, #000 0%, transparent 70%); }
.hero__stage { position: absolute; inset: 0; cursor: grab; }
.hero__stage.is-dragging { cursor: grabbing; }
.hero__stage canvas { width: 100% !important; height: 100% !important; }
.hero__copy { position: relative; z-index: 2; height: 100%; display: flex; flex-direction: column; justify-content: center; padding-top: var(--header-h); pointer-events: none; max-width: 1400px; }
.hero__copy > * { pointer-events: auto; }
.eyebrow { display: inline-flex; align-items: center; gap: 10px; font: 600 12px/1 var(--font-body); letter-spacing: .18em; text-transform: uppercase; color: var(--volt); }
.eyebrow::before { content: ''; width: 28px; height: 1px; background: currentColor; }
.hero h1 { font-size: clamp(40px, 6.6vw, 96px); max-width: 11ch; margin: 22px 0 22px; font-weight: 600; }
.hero h1 em { font-style: normal; color: transparent; -webkit-text-stroke: 1px rgba(232,236,239,.7); }
.hero__lead { max-width: 440px; color: var(--muted); font-size: clamp(15px, 1.4vw, 18px); }
.hero__ctas { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.hero__meta { position: absolute; z-index: 2; left: 0; right: 0; bottom: 28px; display: flex; justify-content: space-between; align-items: flex-end; gap: 20px; pointer-events: none; max-width: 1400px; }
.hero__meta > * { pointer-events: auto; }
.drag-hint { display: inline-flex; align-items: center; gap: 10px; font-size: 13px; color: var(--muted); }
.drag-hint svg { width: 34px; height: 18px; color: var(--volt); }
.hero__stats { display: flex; gap: 34px; }
.hero__stats div { font-size: 12px; color: var(--muted); letter-spacing: .04em; }
.hero__stats strong { display: block; font: 600 22px var(--font-display); color: var(--text); letter-spacing: -0.01em; }
.demo-badge { display: inline-flex; align-items: center; gap: 6px; padding: 5px 10px; border-radius: 999px; border: 1px dashed rgba(255,197,66,.5); color: #ffd98a; background: rgba(255,197,66,.06); font-size: 11px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; }
.hero .demo-badge { position: absolute; right: var(--gutter); top: calc(var(--header-h) + 18px); z-index: 3; }
.scroll-cue { position: absolute; left: 50%; bottom: 22px; transform: translateX(-50%); width: 22px; height: 36px; border: 1.5px solid rgba(255,255,255,.3); border-radius: 12px; z-index: 2; }
.scroll-cue::after { content: ''; position: absolute; left: 50%; top: 7px; width: 3px; height: 7px; margin-left: -1.5px; border-radius: 2px; background: var(--volt); animation: cue 1.8s infinite; }
@keyframes cue { 0% { transform: translateY(0); opacity: 1; } 80% { transform: translateY(12px); opacity: 0; } 100% { opacity: 0; } }
@media (max-width: 760px) {
  .hero__copy { justify-content: flex-start; padding-top: calc(var(--header-h) + 28px); }
  .hero h1 { margin: 16px 0 14px; }
  .hero__stats { display: none; }
  .scroll-cue { display: none; }
  .hero__ctas .btn { flex: 1 1 auto; }
  .hero .demo-badge { top: auto; bottom: 30px; }
}

/* ---------- loader ---------- */
.loader { position: absolute; inset: 0; z-index: 4; display: grid; place-items: center; align-content: center; gap: 14px; background: inherit; transition: opacity .6s var(--ease), visibility .6s; color: var(--muted); font-size: 13px; letter-spacing: .08em; text-transform: uppercase; }
.loader.is-done { opacity: 0; visibility: hidden; pointer-events: none; }
.loader__ring { width: 46px; height: 46px; border-radius: 50%; border: 2px solid rgba(255,255,255,.08); border-top-color: var(--volt); animation: spin 1s linear infinite; }
.loader__bar { width: 160px; height: 2px; background: rgba(255,255,255,.08); border-radius: 2px; overflow: hidden; }
.loader__bar i { display: block; height: 100%; width: 8%; background: var(--volt); transition: width .3s; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- sections ---------- */
.section { position: relative; padding: clamp(80px, 11vw, 150px) 0; }
.section--tight { padding: clamp(56px, 7vw, 90px) 0; }
.section--alt { background: linear-gradient(180deg, var(--c-900), var(--c-950)); }
.section__head { display: grid; grid-template-columns: 1fr 1fr; gap: 24px 60px; align-items: end; margin-bottom: clamp(36px, 5vw, 64px); }
.section__head h2 { font-size: clamp(32px, 4.6vw, 64px); margin-top: 16px; }
.section__head p { color: var(--muted); max-width: 520px; font-size: 17px; }
@media (max-width: 860px) { .section__head { grid-template-columns: 1fr; } }

/* brand strip */
.marquee { border-block: 1px solid rgba(255,255,255,.06); overflow: hidden; padding: 22px 0; background: var(--c-950); }
.marquee__track { display: flex; gap: 56px; width: max-content; animation: marquee 38s linear infinite; font: 500 18px var(--font-display); color: var(--faint); letter-spacing: .04em; text-transform: uppercase; }
.marquee__track span { display: inline-flex; align-items: center; gap: 56px; }
.marquee__track span::after { content: '✦'; color: var(--volt); font-size: 12px; opacity: .6; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ---------- 3D viewers (shared) ---------- */
.viewer { position: relative; border-radius: var(--radius-lg); overflow: hidden; background: radial-gradient(900px 500px at 50% 75%, rgba(43,255,136,.07), transparent 60%), linear-gradient(180deg, #14181b, #0c0e10); border: 1px solid rgba(255,255,255,.07); isolation: isolate; }
.viewer__canvas { position: absolute; inset: 0; cursor: grab; touch-action: none; }
.viewer__canvas:active { cursor: grabbing; }
.viewer__canvas canvas { width: 100% !important; height: 100% !important; }
.viewer__labels { position: absolute; inset: 0; pointer-events: none; z-index: 2; transition: opacity .3s; }
.viewer__labels.is-hidden { opacity: 0; }
.viewer__labels > * { pointer-events: auto; position: absolute; left: 0; top: 0; }
.viewer__top { position: absolute; z-index: 3; top: 16px; left: 16px; right: 16px; display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; pointer-events: none; }
.viewer__top > * { pointer-events: auto; }
.viewer__bar { position: absolute; z-index: 3; left: 16px; right: 16px; bottom: 16px; display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-end; gap: 12px; pointer-events: none; }
.viewer__bar > * { pointer-events: auto; }
.toolbar { display: flex; gap: 6px; flex-wrap: wrap; }
.seg { display: inline-flex; padding: 4px; gap: 2px; border-radius: 12px; background: rgba(17,20,23,.72); border: 1px solid rgba(255,255,255,.1); backdrop-filter: blur(10px); flex-wrap: wrap; }
.seg button { min-height: 36px; padding: 0 12px; border: 0; border-radius: 9px; background: transparent; color: var(--muted); font-size: 13px; font-weight: 600; cursor: pointer; transition: background .2s, color .2s; }
.seg button:hover { color: var(--text); }
.seg button[aria-pressed="true"], .seg button[aria-selected="true"] { background: var(--volt); color: var(--volt-ink); }
.viewer__hint { position: absolute; z-index: 2; left: 50%; top: 50%; transform: translate(-50%, -50%); display: flex; align-items: center; gap: 10px; padding: 10px 16px; border-radius: 999px; background: rgba(11,13,15,.7); backdrop-filter: blur(8px); font-size: 13px; color: var(--text); pointer-events: none; transition: opacity .5s; border: 1px solid rgba(255,255,255,.1); }
.viewer__hint svg { width: 30px; height: 16px; color: var(--volt); }
.viewer.has-interacted .viewer__hint { opacity: 0; }
.viewer__card { position: absolute; z-index: 4; right: 16px; top: 72px; width: min(320px, calc(100% - 32px)); padding: 18px 18px 16px; border-radius: var(--radius); background: rgba(17,20,23,.92); backdrop-filter: blur(14px); border: 1px solid rgba(43,255,136,.25); box-shadow: 0 20px 60px -20px rgba(0,0,0,.8); }
.viewer__card.is-open { animation: cardIn .35s var(--ease); }
.viewer__card h4 { font-size: 17px; margin-bottom: 6px; padding-right: 28px; }
.viewer__card p { color: var(--muted); font-size: 14px; }
.viewer__card .close { position: absolute; right: 10px; top: 10px; width: 30px; height: 30px; border-radius: 8px; border: 0; background: transparent; cursor: pointer; color: var(--muted); font-size: 20px; line-height: 1; }
@keyframes cardIn { from { opacity: 0; transform: translateY(8px); } }
.viewer.is-pseudo-fs, .viewer:fullscreen { position: fixed; inset: 0; z-index: 400; border-radius: 0; width: 100vw; height: 100vh; height: 100dvh; }
html.has-pseudo-fs { overflow: hidden; }

.hotspot { width: 34px; height: 34px; margin: -17px 0 0 -17px; border: 0; background: transparent; cursor: pointer; display: grid; place-items: center; transition: opacity .25s; }
.hotspot.is-hidden { opacity: 0; pointer-events: none; }
.hotspot__dot { width: 14px; height: 14px; border-radius: 50%; background: var(--volt); box-shadow: 0 0 0 5px rgba(43,255,136,.22), 0 0 18px var(--volt-glow); position: relative; }
.hotspot__dot::after { content: ''; position: absolute; inset: -9px; border-radius: 50%; border: 1px solid rgba(43,255,136,.6); animation: ping 2.2s var(--ease) infinite; }
.hotspot.is-active .hotspot__dot { background: #fff; }
@keyframes ping { from { transform: scale(.6); opacity: 1; } to { transform: scale(1.7); opacity: 0; } }
.hotspot--nav { width: auto; height: auto; margin: 0; transform-origin: 0 0; display: flex; flex-direction: column; align-items: center; gap: 6px; translate: -50% -50%; }
.hotspot__ring { width: 46px; height: 46px; border-radius: 50%; display: grid; place-items: center; background: rgba(11,13,15,.6); border: 2px solid var(--volt); color: var(--volt); backdrop-filter: blur(6px); box-shadow: 0 0 24px var(--volt-glow); transition: transform .25s var(--ease), background .25s; }
.hotspot__ring svg { width: 22px; height: 22px; }
.hotspot--nav:hover .hotspot__ring { transform: scale(1.1); background: var(--volt); color: var(--volt-ink); }
.hotspot__label { padding: 4px 10px; border-radius: 999px; background: rgba(11,13,15,.78); font-size: 12px; font-weight: 600; white-space: nowrap; }
.tag { padding: 5px 10px; border-radius: 8px; border: 1px solid rgba(255,255,255,.14); background: rgba(11,13,15,.78); backdrop-filter: blur(6px); font-size: 12px; font-weight: 600; cursor: pointer; translate: -50% calc(-100% - 10px); white-space: nowrap; transition: opacity .25s, border-color .2s, background .2s; }
.tag::after { content: ''; position: absolute; left: 50%; bottom: -10px; width: 1px; height: 10px; background: rgba(255,255,255,.35); }
.tag.is-active { border-color: var(--volt); color: var(--volt); }
.tag.is-hidden { opacity: 0; pointer-events: none; }

.swatches { display: flex; gap: 8px; align-items: center; padding: 8px 10px; border-radius: 12px; background: rgba(17,20,23,.72); border: 1px solid rgba(255,255,255,.1); backdrop-filter: blur(10px); }
.swatch { width: 26px; height: 26px; border-radius: 50%; border: 2px solid rgba(255,255,255,.2); background: radial-gradient(circle at 35% 30%, rgba(255,255,255,.55), transparent 45%), var(--c); cursor: pointer; transition: transform .2s; }
.swatch[aria-pressed="true"] { border-color: var(--volt); transform: scale(1.12); box-shadow: 0 0 0 3px rgba(43,255,136,.2); }
.readout { font: 600 12px var(--font-body); color: var(--muted); letter-spacing: .08em; text-transform: uppercase; padding: 8px 12px; border-radius: 10px; background: rgba(17,20,23,.72); border: 1px solid rgba(255,255,255,.08); }
.readout b { color: var(--volt); font-variant-numeric: tabular-nums; }

.fallback { display: none; }
.viewer.is-fallback .fallback { display: block; position: relative; z-index: 5; }
.viewer.is-fallback .viewer__canvas, .viewer.is-fallback .viewer__bar, .viewer.is-fallback .viewer__top, .viewer.is-fallback .viewer__hint, .viewer.is-fallback .loader { display: none; }

/* studio */
.studio { height: min(78vh, 760px); min-height: 480px; }
.studio__specs { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; margin-top: 24px; border-radius: var(--radius); overflow: hidden; background: rgba(255,255,255,.06); }
.studio__specs div { background: var(--c-950); padding: 20px; }
.studio__specs dt { color: var(--muted); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; }
.studio__specs dd { margin: 6px 0 0; font: 600 22px var(--font-display); }
@media (max-width: 760px) {
  .studio { height: 76svh; min-height: 520px; }
  .studio__specs { grid-template-columns: 1fr 1fr; }
  .viewer__card { top: auto; bottom: 150px; right: 12px; left: 12px; width: auto; }
  .readout { display: none; }
  .viewer .icon-btn { width: 40px; height: 40px; }
  .viewer__hint { white-space: nowrap; font-size: 12px; padding: 8px 12px; }
  .viewer__top, .viewer__bar { left: 10px; right: 10px; }
  .viewer__bar { bottom: 10px; }
}

/* ---------- services ---------- */
.services { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.svc { position: relative; padding: 26px; border-radius: var(--radius); background: linear-gradient(180deg, rgba(255,255,255,.035), rgba(255,255,255,.012)); border: 1px solid rgba(255,255,255,.07); display: flex; flex-direction: column; gap: 12px; min-height: 250px; transition: border-color .3s, transform .4s var(--ease), background .3s; overflow: hidden; }
.svc::before { content: ''; position: absolute; inset: -1px; border-radius: inherit; background: radial-gradient(400px 200px at var(--mx, 50%) var(--my, 0%), rgba(43,255,136,.12), transparent 60%); opacity: 0; transition: opacity .3s; pointer-events: none; }
.svc:hover { border-color: rgba(43,255,136,.35); transform: translateY(-3px); }
.svc:hover::before { opacity: 1; }
.svc__cat { font-size: 11px; font-weight: 600; letter-spacing: .14em; text-transform: uppercase; color: var(--volt); }
.svc h3 { font-size: 21px; }
.svc p { color: var(--muted); font-size: 14.5px; flex: 1; }
.svc__foot { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding-top: 14px; border-top: 1px solid rgba(255,255,255,.06); font-size: 13px; color: var(--muted); }
.svc__price { color: var(--text); font: 600 17px var(--font-display); }
.svc__link { display: inline-flex; align-items: center; gap: 6px; color: var(--volt); font-weight: 600; text-decoration: none; font-size: 14px; }
.svc__link::after { content: '→'; transition: transform .25s var(--ease); }
.svc:hover .svc__link::after { transform: translateX(4px); }
@media (max-width: 1000px) { .services { grid-template-columns: 1fr 1fr; } }
@media (max-width: 640px) { .services { grid-template-columns: 1fr; } .svc { min-height: 0; } }

/* battery */
.battery { display: grid; grid-template-columns: 1.45fr 1fr; gap: 20px; margin-top: clamp(64px, 9vw, 120px); }
.battery .viewer { height: 560px; }
.battery__side { display: flex; flex-direction: column; gap: 16px; }
.battery__side h3 { font-size: clamp(26px, 3vw, 38px); margin-top: 12px; }
.battery__side > p { color: var(--muted); }
.battery__list { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.battery__list button { width: 100%; text-align: left; padding: 12px 14px; border-radius: 10px; border: 1px solid rgba(255,255,255,.08); background: rgba(255,255,255,.02); cursor: pointer; font-size: 14px; font-weight: 500; transition: border-color .2s, background .2s; }
.battery__list button:hover { border-color: rgba(255,255,255,.25); }
.battery__list button[aria-pressed="true"] { border-color: var(--volt); background: rgba(43,255,136,.08); color: var(--volt); }
.battery__info { padding: 18px; border-radius: var(--radius); background: var(--c-850); border-left: 3px solid var(--volt); min-height: 112px; }
.battery__info h4 { font-size: 17px; margin-bottom: 6px; }
.battery__info p { color: var(--muted); font-size: 14.5px; }
.note { font-size: 12.5px; color: var(--faint); display: flex; gap: 8px; align-items: flex-start; }
.note::before { content: 'i'; flex: none; width: 18px; height: 18px; border-radius: 50%; border: 1px solid currentColor; display: grid; place-items: center; font: 600 11px var(--font-body); font-style: normal; }
@media (max-width: 980px) { .battery { grid-template-columns: 1fr; } .battery .viewer { height: 62svh; min-height: 420px; } }

/* ---------- tour ---------- */
.tour { height: min(80vh, 780px); min-height: 520px; background: #1a1e22; }
.tour .viewer__canvas { cursor: grab; }
.tour.is-moving .viewer__canvas { cursor: progress; }
.tour__points { display: flex; gap: 6px; padding: 4px; border-radius: 12px; background: rgba(17,20,23,.72); border: 1px solid rgba(255,255,255,.1); backdrop-filter: blur(10px); overflow-x: auto; scrollbar-width: none; max-width: 100%; }
.tour__points button { flex: none; min-height: 40px; padding: 0 14px; border: 0; border-radius: 9px; background: transparent; color: var(--muted); font-size: 13px; font-weight: 600; cursor: pointer; display: inline-flex; align-items: center; gap: 8px; }
.tour__points button[aria-selected="true"] { background: var(--volt); color: var(--volt-ink); }
.tour__num { font: 600 11px var(--font-display); opacity: .7; }
.tour__caption { max-width: 360px; padding: 14px 16px; border-radius: 12px; background: rgba(11,13,15,.72); backdrop-filter: blur(10px); border: 1px solid rgba(255,255,255,.08); }
.tour__caption h3 { font-size: 18px; margin-bottom: 4px; }
.tour__caption p { font-size: 13.5px; color: var(--muted); }
.tour-fallback { padding: 28px; display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.tour-fallback figure { margin: 0; border-radius: var(--radius); overflow: hidden; background: var(--c-850); }
.tour-fallback img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.tour-fallback figcaption { padding: 12px 14px; font-size: 14px; color: var(--muted); }
.tour-fallback figcaption b { color: var(--text); display: block; }
.viewer.is-fallback.tour, .viewer.is-fallback.studio, .battery .viewer.is-fallback { height: auto; min-height: 0; }
@media (max-width: 760px) {
  .tour { height: 78svh; }
  .tour__caption { display: none; }
  .tour-fallback { grid-template-columns: 1fr; padding: 16px; }
  .viewer__top { flex-direction: column; }
}

/* ---------- process ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; counter-reset: s; }
.step { position: relative; padding: 26px 22px; border-radius: var(--radius); border: 1px solid rgba(255,255,255,.07); background: var(--c-900); }
.step::before { counter-increment: s; content: '0' counter(s); font: 600 13px var(--font-display); color: var(--volt); }
.step h3 { font-size: 19px; margin: 14px 0 8px; }
.step p { color: var(--muted); font-size: 14.5px; }
@media (max-width: 900px) { .steps { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .steps { grid-template-columns: 1fr; } }

/* ---------- about ---------- */
.about { display: grid; grid-template-columns: 1.1fr 1fr; gap: clamp(32px, 6vw, 90px); align-items: center; }
.about__visual { position: relative; aspect-ratio: 4/5; border-radius: var(--radius-lg); overflow: hidden; background: linear-gradient(160deg, #1c2226, #0d1012); border: 1px solid rgba(255,255,255,.07); }
.about__visual img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .9; }
.about__visual .demo-badge { position: absolute; left: 16px; top: 16px; }
.about__copy h2 { font-size: clamp(32px, 4.2vw, 56px); margin: 16px 0 22px; }
.about__copy p + p { margin-top: 14px; }
.about__copy p { color: var(--muted); font-size: 16.5px; }
.counters { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 36px; }
.counters strong { display: block; font: 600 clamp(30px, 3.6vw, 46px) var(--font-display); color: var(--text); }
.counters span { font-size: 13px; color: var(--muted); }
.certs { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 28px; }
.certs span { padding: 8px 12px; border-radius: 999px; border: 1px solid rgba(255,255,255,.12); font-size: 13px; color: var(--muted); }
@media (max-width: 900px) { .about { grid-template-columns: 1fr; } .about__visual { aspect-ratio: 16/10; } }

/* ---------- contact ---------- */
.contact { display: grid; grid-template-columns: 1fr 1.1fr; gap: 20px; }
.contact__card { padding: clamp(24px, 3vw, 40px); border-radius: var(--radius-lg); background: var(--c-900); border: 1px solid rgba(255,255,255,.07); }
.contact__card h3 { font-size: 24px; margin-bottom: 18px; }
.contact dl { display: grid; grid-template-columns: 120px 1fr; gap: 14px 18px; margin: 0; }
.contact dt { color: var(--muted); font-size: 13px; letter-spacing: .06em; text-transform: uppercase; padding-top: 2px; }
.contact dd { margin: 0; }
.contact dd a { text-decoration-color: rgba(43,255,136,.5); text-underline-offset: 4px; }
.map { position: relative; min-height: 360px; border-radius: var(--radius-lg); overflow: hidden; border: 1px solid rgba(255,255,255,.07); background: #101417; }
.map svg { position: absolute; inset: 0; width: 100%; height: 100%; }
.map__pin { position: absolute; left: 56%; top: 46%; transform: translate(-50%, -100%); display: flex; flex-direction: column; align-items: center; gap: 6px; }
.map__pin b { padding: 6px 12px; border-radius: 999px; background: var(--volt); color: var(--volt-ink); font-size: 13px; }
.map__pin i { width: 14px; height: 14px; border-radius: 50%; background: var(--volt); box-shadow: 0 0 0 8px rgba(43,255,136,.2); }
.map .demo-badge { position: absolute; left: 14px; bottom: 14px; }
@media (max-width: 900px) { .contact { grid-template-columns: 1fr; } .contact dl { grid-template-columns: 1fr; gap: 4px; } .contact dd { margin-bottom: 12px; } }

/* ---------- CTA band & footer ---------- */
.cta-band { position: relative; overflow: hidden; border-radius: var(--radius-lg); padding: clamp(36px, 6vw, 72px); background: radial-gradient(700px 300px at 85% 0%, rgba(43,255,136,.22), transparent 60%), var(--c-850); border: 1px solid rgba(43,255,136,.2); display: flex; justify-content: space-between; align-items: center; gap: 24px; flex-wrap: wrap; }
.cta-band h2 { font-size: clamp(28px, 3.6vw, 48px); max-width: 16ch; }
.footer { padding: 64px 0 40px; border-top: 1px solid rgba(255,255,255,.06); margin-top: 80px; color: var(--muted); font-size: 14px; }
.footer__grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 32px; }
.footer h4 { font-size: 13px; letter-spacing: .12em; text-transform: uppercase; color: var(--text); margin-bottom: 14px; font-family: var(--font-body); }
.footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.footer a { text-decoration: none; }
.footer a:hover { color: var(--text); }
.footer__base { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-top: 48px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,.06); font-size: 12.5px; color: var(--faint); }
.linklike { background: none; border: 0; padding: 0; cursor: pointer; color: inherit; text-decoration: underline; text-underline-offset: 3px; font-size: inherit; }
@media (max-width: 860px) { .footer__grid { grid-template-columns: 1fr 1fr; } }

/* reveal (JS adds .is-in; without JS everything is visible) */
.js [data-reveal] { opacity: 0; transform: translateY(28px); }
.js [data-reveal].is-in { opacity: 1; transform: none; transition: opacity .9s var(--ease), transform .9s var(--ease); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
  .js [data-reveal] { opacity: 1; transform: none; }
  .marquee__track { animation: none; }
}

/* ---------- hero: 2D battery-hub illustration ---------- */
.hero__art { position: absolute; z-index: 1; top: var(--header-h); bottom: 64px; right: var(--gutter); width: min(52vw, 800px); display: grid; place-items: center; pointer-events: none; }
.hero__art svg { width: 100%; height: 100%; max-height: 720px; overflow: visible; }
.hero__art text { font-family: var(--font-display); text-anchor: middle; }
.ha-rings circle { stroke: rgba(255,255,255,.05); stroke-width: 1.5; }
.ha-orbit { stroke: var(--volt); stroke-opacity: .28; stroke-width: 2; stroke-dasharray: 2 14; transform-box: fill-box; transform-origin: center; animation: ha-spin 60s linear infinite; }
.ha-pulse { stroke: var(--volt); stroke-width: 2; transform-box: fill-box; transform-origin: center; animation: ha-pulse 4.2s var(--ease) infinite; opacity: 0; }
.ha-traces path { stroke: var(--c-600); stroke-width: 2.5; }
.ha-flow path { stroke: var(--volt); stroke-width: 2.5; stroke-linecap: round; stroke-dasharray: 6 26; animation: ha-flow 1.6s linear infinite; }
.ha-node circle { fill: var(--c-850); stroke: var(--volt); stroke-opacity: .6; stroke-width: 2; }
.ha-node path { stroke: var(--volt); stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; vector-effect: non-scaling-stroke; }
.ha-lbl text { fill: var(--muted); font-size: 15px; font-weight: 500; letter-spacing: .02em; }
.ha-chip rect { fill: var(--c-800); stroke: var(--c-600); }
.ha-chip circle { fill: var(--volt); animation: ha-blink 1.4s ease-in-out infinite; }
.ha-chip text { fill: var(--text); font-size: 14px; font-weight: 600; letter-spacing: .04em; }
.ha-body { fill: var(--c-850); stroke: var(--volt); stroke-width: 3; }
.ha-term { fill: var(--volt); }
.ha-cells rect { fill: var(--c-700); animation: ha-cell 4.2s steps(1) infinite; }
.ha-cells rect:nth-child(2) { animation-delay: .35s; } .ha-cells rect:nth-child(3) { animation-delay: .7s; }
.ha-cells rect:nth-child(4) { animation-delay: 1.05s; } .ha-cells rect:nth-child(5) { animation-delay: 1.4s; } .ha-cells rect:nth-child(6) { animation-delay: 1.75s; }
.ha-bolt { fill: var(--text); stroke: var(--c-950); stroke-width: 6; paint-order: stroke; stroke-linejoin: round; }
.ha-tag { fill: var(--faint); font-size: 12px; font-weight: 600; letter-spacing: .32em; }
@keyframes ha-spin { to { transform: rotate(360deg); } }
@keyframes ha-pulse { 0% { transform: scale(.75); opacity: .5; } 100% { transform: scale(1.35); opacity: 0; } }
@keyframes ha-flow { to { stroke-dashoffset: -64; } }
@keyframes ha-blink { 50% { opacity: .25; } }
/* each cell lights up in turn, the pack holds full, then drains and repeats */
@keyframes ha-cell { 0% { fill: var(--c-700); } 8% { fill: var(--volt); } 86% { fill: var(--volt); } 92% { fill: var(--c-700); } }
@media (prefers-reduced-motion: reduce) {
  .ha-orbit, .ha-pulse, .ha-flow path, .ha-chip circle, .ha-cells rect { animation: none; }
  .ha-cells rect { fill: var(--volt); } .ha-cells rect:last-child { fill: var(--c-700); }
}
@media (max-width: 1100px) { .hero__art { opacity: .5; } }
@media (max-width: 760px) {
  .hero__art { left: 0; right: 0; width: auto; top: auto; bottom: 10px; height: 46%; opacity: 1; }
  .hero .drag-hint { display: none; }
  .ha-lbl { display: none; }
}

/* ---------- 2D service icons and the 3D zone divider ---------- */
.svc__icon { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; background: rgba(43,255,136,.08); border: 1px solid rgba(43,255,136,.22); color: var(--volt); margin-bottom: 18px; }
.svc__icon svg { width: 22px; height: 22px; }
.zone { padding-block: clamp(64px, 9vw, 120px) 0; text-align: center; }
.zone .eyebrow { justify-content: center; }
.zone h2 { font-size: clamp(30px, 4.2vw, 56px); margin: 16px auto 14px; max-width: 16ch; text-wrap: balance; }
.zone p { color: var(--muted); max-width: 560px; margin: 0 auto; }
.about__art { width: 100%; height: 100%; display: block; }
.zone + .section { padding-top: clamp(40px, 5vw, 64px); }

/* ---------- final content: units, other services, testimonials, contact, socials ---------- */
.svc__units { display: flex; flex-wrap: wrap; gap: 6px; }
.svc__units span { padding: 3px 9px; border-radius: 999px; border: 1px solid rgba(255,255,255,.12); font-size: 12px; color: var(--muted); }
.other { margin-top: clamp(40px, 5vw, 64px); }
.other__head { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; flex-wrap: wrap; margin-bottom: 18px; }
.other__head h3 { font-size: 24px; }
.other__head p { color: var(--muted); }
.other__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.other__item { display: flex; flex-direction: column; gap: 6px; padding: 22px; border-radius: var(--radius); border: 1px solid rgba(255,255,255,.07); background: var(--c-900); text-decoration: none; transition: border-color .25s, transform .25s var(--ease); min-width: 0; }
.other__item:hover { border-color: rgba(43,255,136,.4); transform: translateY(-2px); }
.other__item .svc__icon { margin-bottom: 10px; }
.other__item b { font: 600 18px var(--font-display); }
.other__item span:last-child { color: var(--muted); font-size: 14.5px; }
@media (max-width: 860px) { .other__grid { grid-template-columns: 1fr; } }

.quotes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.quote { margin: 0; display: flex; flex-direction: column; justify-content: space-between; gap: 22px; padding: 26px; border-radius: var(--radius); border: 1px solid rgba(255,255,255,.07); background: var(--c-900); min-width: 0; }
.quote blockquote { margin: 0; font-size: 16px; line-height: 1.6; color: var(--text); }
.quote blockquote::before { content: '“'; display: block; font: 700 44px/0.8 var(--font-display); color: var(--volt); margin-bottom: 10px; }
.quote figcaption { display: flex; gap: 12px; align-items: center; font-size: 13px; color: var(--muted); }
.quote figcaption b { display: block; color: var(--text); font-size: 14.5px; }
.quote__avatar { flex: none; width: 40px; height: 40px; border-radius: 50%; display: grid; place-items: center; background: rgba(43,255,136,.1); border: 1px solid rgba(43,255,136,.3); color: var(--volt); font: 600 13px var(--font-display); }
@media (max-width: 960px) { .quotes { grid-template-columns: 1fr 1fr; } }
@media (max-width: 620px) { .quotes { grid-template-columns: 1fr; } }

.faint { color: var(--faint); font-size: 13px; }
.social { display: flex; gap: 8px; flex-wrap: wrap; }
.social a { width: 40px; height: 40px; border-radius: 12px; display: grid; place-items: center; border: 1px solid rgba(255,255,255,.12); color: var(--text); transition: border-color .2s, color .2s; }
.social a:hover { border-color: var(--volt); color: var(--volt); }
.social svg { width: 20px; height: 20px; }
.footer .social { margin-top: 18px; }
.footer__tag { margin-top: 14px; color: var(--volt); font-size: 12px; font-weight: 600; letter-spacing: .14em; text-transform: uppercase; }
a.map { display: block; color: inherit; text-decoration: none; }
.map__cta { position: absolute; left: 14px; right: 14px; bottom: 14px; padding: 12px 16px; border-radius: 12px; background: rgba(11,13,15,.85); border: 1px solid rgba(255,255,255,.1); font-size: 14px; font-weight: 600; }
a.map:hover .map__cta { border-color: var(--volt); color: var(--volt); }
.cta-band__actions { display: flex; gap: 10px; flex-wrap: wrap; }
.wa-float { position: fixed; z-index: 40; right: 18px; bottom: calc(18px + env(safe-area-inset-bottom, 0px)); display: inline-flex; align-items: center; gap: 10px; min-height: 52px; padding: 0 20px 0 16px; border-radius: 999px; background: var(--volt); color: var(--volt-ink); font-weight: 600; text-decoration: none; box-shadow: 0 12px 40px -10px var(--volt-glow), 0 4px 14px rgba(0,0,0,.4); }
.wa-float svg { width: 22px; height: 22px; }
@media (max-width: 560px) { .wa-float span { display: none; } .wa-float { padding: 0; width: 56px; justify-content: center; } }
.wa-float { transition: opacity .3s, transform .3s var(--ease); }
.wa-float.is-hidden { opacity: 0; transform: translateY(12px); pointer-events: none; }
.footer { padding-bottom: 110px; }

/* Staff login link to the Unit Tracker: a header button on desktop, a menu item on phones */
.nav a.nav__login { display: none; color: var(--volt); }
.header__cta + .header__cta { margin-left: -16px; }
@media (max-width: 1080px) { .nav a.nav__login { display: block; } }