/* Promotional website; the calculation application uses a separate design system. */
@font-face {
  font-family:'Inter'; font-style:normal; font-weight:100 900; font-display:swap;
  src:url('fonts/inter-latin-ext-wght-normal.woff2') format('woff2');
  unicode-range:U+0100-024F,U+0259,U+1E00-1EFF;
}
@font-face {
  font-family:'Inter'; font-style:normal; font-weight:100 900; font-display:swap;
  src:url('fonts/inter-latin-wght-normal.woff2') format('woff2');
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}
:root {
  --bg:#f6f7f9; --surface:#fff; --sunken:#edf0f5; --hover:#e9eef8;
  --line:#c9d0db; --line-soft:#e1e5ec; --text:#141b28; --muted:#5c6575;
  --accent:#3167f5; --accent-hover:#2858d8; --accent-ink:#2858cf; --on-accent:#fff;
  --cyan:#b74d22; --ok:#237455; --fault:#ed6b32; --fault-ink:#b74d22; --focus:#2858cf; --r:16px;
  --header-bg:rgba(255,255,255,.88); --header-line:rgba(255,255,255,.96);
  --shadow:0 12px 48px rgba(28,42,67,.055);
  --font-ui:'Inter','Segoe UI',system-ui,-apple-system,sans-serif;
  --font-mono:'Consolas','SFMono-Regular',monospace;
  --ease:cubic-bezier(.22,.7,.23,1); color-scheme:light;
}
:root[data-theme='dark'] {
  --bg:#10151e; --surface:#18202c; --sunken:#0b1019; --hover:#202b3b;
  --line:#3a485c; --line-soft:#283343; --text:#edf1f8; --muted:#aeb8c8;
  --accent:#83a8ff; --accent-hover:#a1bcff; --accent-ink:#83a8ff; --on-accent:#111725;
  --cyan:#ffa875; --ok:#83cfaf; --fault:#ed6b32; --fault-ink:#ffa875; --focus:#a1bcff;
  --header-bg:rgba(24,32,44,.9); --header-line:rgba(84,101,127,.4);
  --shadow:0 12px 48px rgba(0,0,0,.12); color-scheme:dark;
}
* {box-sizing:border-box}
html {scroll-behavior:smooth;scroll-padding-top:120px}
body {margin:0;min-width:320px;background:var(--bg);color:var(--text);font:400 16px/1.65 var(--font-ui);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
main {overflow:clip}
a {color:inherit;text-underline-offset:.24em}
button,input,select,textarea {font:inherit}
button,a {-webkit-tap-highlight-color:transparent}
button {cursor:pointer}
button:disabled {cursor:default;opacity:.6}
img,svg {max-width:100%}
h1,h2,h3,p {margin:0}
h1,h2,h3 {line-height:1.08;letter-spacing:-.045em;font-weight:580;text-wrap:balance}
h1 {font-size:clamp(3.5rem,6.5vw,5.75rem)}
h2 {font-size:clamp(2.5rem,4.25vw,4rem);max-width:19ch}
h3 {font-size:1.48rem;letter-spacing:-.03em;line-height:1.22}
:focus-visible {outline:3px solid var(--focus);outline-offset:5px}
::selection {background:var(--accent);color:var(--on-accent)}
[hidden] {display:none!important}
section[id] {scroll-margin-top:24px}
.wrap {width:min(1400px,calc(100% - 96px));margin-inline:auto}
.mono {font-family:inherit;font-variant-numeric:tabular-nums}
.muted {color:var(--muted)}
.skip {position:fixed;left:20px;top:20px;z-index:100;transform:translateY(-180%);padding:12px 20px;border-radius:12px;background:var(--surface);color:var(--text);border:2px solid var(--focus)}
.skip:focus {transform:none}
.btn {display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:52px;padding:13px 23px;border:1px solid var(--line);border-radius:999px;background:transparent;color:var(--text);font-size:.875rem;font-weight:580;text-decoration:none;line-height:1.45;text-align:center;transition:background-color .2s,border-color .2s,box-shadow .2s,transform .2s}
.btn:hover {background:var(--surface);border-color:var(--text);transform:translateY(-2px)}
.btn:active {transform:translateY(0)}
.btn-primary {color:var(--on-accent);background:var(--accent);border-color:var(--accent)}
.btn-primary:hover {color:var(--on-accent);background:var(--accent-hover);border-color:var(--accent-hover);box-shadow:0 6px 22px rgba(49,103,245,.15)}
.btn svg {width:18px;height:18px;flex:none}
.text-link,.evidence-link {display:inline-flex;align-items:center;gap:8px;color:var(--accent-ink);font-size:.875rem;font-weight:550;text-decoration-thickness:1px}
.text-link:hover,.evidence-link:hover {text-decoration-thickness:2px}
.eyebrow {display:flex;align-items:center;gap:10px;margin-bottom:25px;color:var(--accent-ink);font-size:.75rem;line-height:1.4;letter-spacing:.075em;font-weight:620}
.eyebrow::before {content:'';width:6px;height:6px;border-radius:50%;background:currentColor;flex:none}
.section {padding:clamp(80px,9vw,140px) 0}
.section-soft {background:var(--surface)}
.section-head {display:grid;grid-template-columns:1.3fr .7fr;align-items:end;gap:72px;margin-bottom:64px}
.section-intro {max-width:44ch;color:var(--muted);font-size:1rem;line-height:1.75}
.section-index,.hero-index {color:var(--muted);font-size:.75rem;font-weight:500;letter-spacing:.025em}
.section-index {display:inline-block;margin-right:15px;color:var(--accent-ink)}
.site-header {position:sticky;z-index:40;top:16px;width:min(1400px,calc(100% - 32px));margin:16px auto 0;background:var(--header-bg);border:1px solid var(--header-line);border-radius:24px;box-shadow:var(--shadow);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px)}
.site-header .wrap {width:100%;max-width:none}
.header-in {display:flex;align-items:center;gap:24px;min-height:76px;padding:10px 20px 10px 26px}
.brand {display:inline-flex;align-items:center;gap:10px;text-decoration:none;white-space:nowrap;font-size:1.4rem;font-weight:660;letter-spacing:-.055em}
.brand svg {width:28px;height:28px;color:var(--accent);flex:none}
.brand-dot {color:var(--accent);margin-left:-8px}
.desktop-nav {display:flex;align-items:center;gap:26px;margin-left:auto;color:var(--muted);font-size:.8rem;font-weight:510}
.desktop-nav a {padding-block:12px;text-decoration:none}
.desktop-nav a:hover {color:var(--text)}
.tools {display:flex;align-items:center;gap:3px}
.education-header .tools {margin-left:auto}
.tool {min-width:42px;min-height:44px;background:transparent;color:var(--muted);border:0;border-radius:50%;font-size:.75rem;font-weight:550}
.tool:hover {background:var(--hover);color:var(--text)}
.tool svg {width:18px;height:18px;vertical-align:middle}
.login-top {min-height:45px;padding:10px 19px;white-space:nowrap;font-size:.8rem;background:var(--text);border-color:var(--text);color:var(--bg)}
.login-top:hover {color:var(--text);border-color:var(--text)}
.mobile-nav {display:none;padding:0 24px 8px;border-top:1px solid var(--line-soft)}
.mobile-nav summary {cursor:pointer;padding:12px 0;color:var(--muted);font-size:.8rem;font-weight:550}
.mobile-links {display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:5px 18px;padding:0 0 10px;font-size:.8rem}
.mobile-links a {padding:9px 0;text-decoration:none}
.hero {padding:clamp(54px,6.5vw,96px) 0 48px;position:relative}
.hero-grid {display:grid;grid-template-columns:1.06fr .94fr;gap:22px;align-items:center}
.hero-grid>* {min-width:0}
.hero-index {margin-bottom:28px}
.hero h1 {max-width:13ch;position:relative;z-index:2}
.hero-word {display:block;color:var(--text)}
.hero-word+.hero-word {color:var(--accent)}
.hero h1>span:not(.hero-word) {display:block}
.lede {margin-top:30px;max-width:49ch;color:var(--muted);font-size:clamp(1rem,1.22vw,1.12rem);line-height:1.75}
.actions {display:flex;flex-wrap:wrap;gap:11px;margin-top:34px}
.hero-note {margin-top:19px;max-width:53ch;color:var(--muted);font-size:.75rem;line-height:1.65}
.hero-tail {display:flex;justify-content:space-between;align-items:center;gap:36px;margin-top:60px;padding-top:25px;border-top:1px solid var(--line-soft)}
.standards {display:flex;flex-wrap:wrap;gap:13px 28px;color:var(--muted);font-size:.73rem;line-height:1.5}
.standards span {display:inline-flex;align-items:center;gap:8px}
.standards span::before {content:'';width:4px;height:4px;background:var(--line);border-radius:50%}
.hero-tail .text-link {flex:none}
.hero-tail>span {color:var(--muted);font-size:.72rem;line-height:1.6}
.hero-bottom {display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:48px;margin-top:64px;padding-top:28px;border-top:1px solid var(--line-soft)}
.hero-bottom strong {display:block;font-size:.95rem;font-weight:580;margin-bottom:8px}
.hero-bottom p {color:var(--muted);font-size:.85rem;max-width:37ch}
.scene-shell {position:relative;isolation:isolate;min-width:0;margin-right:-24px}
.scene-shell::before {content:'';pointer-events:none;position:absolute;inset:9% -5% 8%;z-index:-1;border-radius:50%;background:radial-gradient(ellipse at 50% 55%,rgba(49,103,245,.065),transparent 66%)}
#network-stage {position:relative;width:100%;height:clamp(440px,43vw,620px);min-height:0;touch-action:pan-y}
#network-stage canvas,[data-scene-fallback] {position:absolute;inset:0;display:block;width:100%;height:100%;object-fit:contain;border-radius:22px}
[data-scene-fallback] {color:var(--accent)}
.scene-svg-wires {color:var(--accent);opacity:.55}
.scene-svg-nodes {color:var(--accent-ink);opacity:.85}
.scene-shell.is-webgl [data-scene-fallback] {display:none}
.scene-caption {position:relative;margin-top:12px;color:var(--muted);font-size:.7rem;line-height:1.6;max-width:65ch;padding-inline:18px}
.scene-controls {display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:9px 16px;padding:12px 18px 0}
.scene-modes {display:inline-flex;align-items:center;flex-wrap:wrap;gap:2px;padding:4px;background:var(--sunken);border-radius:999px}
.scene-mode {min-height:40px;padding:9px 16px;border:0;border-radius:999px;color:var(--muted);background:transparent;font-size:.75rem;font-weight:550}
.scene-mode:hover {color:var(--text)}
.scene-mode[aria-pressed='true'],.scene-mode[aria-selected='true'] {background:var(--surface);color:var(--accent-ink);box-shadow:0 2px 7px rgba(28,42,67,.035)}
.scene-controls>button:not(.scene-mode) {min-height:44px;padding:10px;color:var(--muted);border:0;background:transparent;font-size:.75rem;border-radius:12px}
.scene-controls>button:not(.scene-mode):hover {color:var(--text);background:var(--hover)}
.scene-controls>.scene-motion {display:grid;place-items:center;width:44px;height:44px;min-height:44px;padding:0;flex:none}
.scene-motion svg {display:block;width:18px;height:18px;flex:none}
.scene-label {position:absolute;z-index:3;top:20px;left:20px;display:flex;align-items:center;gap:8px;font-size:.7rem;color:var(--muted);pointer-events:none}
.scene-label-voltage {left:auto;right:20px}
.scene-readout {position:absolute;z-index:3;left:20px;bottom:24px;display:grid;gap:5px;max-width:calc(100% - 40px);padding:16px 20px;border-radius:18px;background:var(--header-bg);box-shadow:var(--shadow);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);color:var(--muted);font:.75rem/1.5 var(--font-ui);pointer-events:none}
.scene-readout-label {font:.65rem/1.5 var(--font-mono);font-variant-numeric:tabular-nums;color:var(--accent-ink);letter-spacing:.025em}
.scene-readout strong {color:var(--text);font-size:1rem;font-weight:560;letter-spacing:-.025em}
.page-progress {position:fixed;z-index:80;top:0;left:0;width:100%;height:2px;background:var(--accent);transform:scaleX(var(--scroll-progress,0));transform-origin:left;pointer-events:none}
.signal-dot {width:6px;height:6px;display:inline-block;flex:none;border-radius:50%;background:var(--accent)}
.signal-dot.fault {background:var(--fault)}
.step-grid {display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:48px}
.step {min-width:0;position:relative;padding:25px 0 0;border-top:1px solid var(--line)}
.step-num {display:flex;align-items:center;justify-content:space-between;color:var(--muted);font-size:.8rem;font-weight:500;margin-bottom:46px}
.step-num svg {width:36px;height:36px;color:var(--accent)}
.step h3 {max-width:17ch;font-size:1.65rem}
.step p {max-width:42ch;margin-top:17px;color:var(--muted);font-size:.92rem;line-height:1.75}
.step-foot {display:block;margin-top:27px;color:var(--accent-ink);font-size:.72rem;font-weight:540;letter-spacing:.025em}
.feature-grid {display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:30px 56px}
.feature {position:relative;min-width:0;border-top:1px solid var(--line);padding:26px 0 36px}
.feature:first-child,.feature-wide {grid-column:span 2}
.feature:first-child h3,.feature-wide h3 {font-size:clamp(1.8rem,3vw,2.5rem);max-width:24ch}
.feature-number {display:block;color:var(--muted);font-size:.72rem;font-weight:500;margin-bottom:27px}
.feature-ref {display:block;color:var(--muted);font-size:.68rem;line-height:1.5;font-weight:530;letter-spacing:.01em;margin-bottom:25px}
.feature h3 {max-width:25ch}
.feature p {margin-top:17px;color:var(--muted);font-size:.9rem;line-height:1.75;max-width:53ch}
.feature-lead p {max-width:66ch;font-size:1.02rem}
.feature .text-link {margin-top:20px}
.mining-note {display:grid;grid-template-columns:.9fr 1.1fr;gap:48px;margin-top:48px;padding:32px 0;border-block:1px solid var(--line-soft)}
.mining-note p {color:var(--muted);font-size:.92rem}
.mining-note h3 {margin-bottom:12px}
.evidence-grid {display:grid;grid-template-columns:.85fr 1.15fr;gap:100px}
.evidence-grid .section-intro {margin-top:30px}
.evidence-link {margin-top:28px}
.evidence-list {padding:0;margin:0;list-style:none}
.evidence-list li {display:grid;grid-template-columns:44px minmax(0,1fr);gap:22px;padding:27px 0;border-bottom:1px solid var(--line-soft)}
.evidence-list li:first-child {padding-top:8px}
.evidence-list li:last-child {padding-bottom:0;border-bottom:0}
.evidence-icon {width:40px;height:40px;display:grid;place-items:center;color:var(--accent);background:var(--sunken);border-radius:50%}
.evidence-icon svg {width:19px;height:19px}
.evidence-list h3 {font-size:1.12rem;margin:0 0 12px}
.evidence-list p {color:var(--muted);font-size:.9rem;max-width:57ch}
.audience-grid {display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;align-items:stretch}
.audience {display:flex;flex-direction:column;gap:22px;padding:32px 24px 32px 0;border-top:1px solid var(--line);min-width:0}
.audience.recommended {padding:32px;border:0;border-radius:24px;background:var(--surface);box-shadow:var(--shadow)}
.audience-tag {color:var(--accent-ink);font-size:.72rem;font-weight:570;letter-spacing:.02em}
.audience h3 {font-size:1.8rem}
.audience p {font-size:.92rem;color:var(--muted)}
.audience ul {margin:0 0 8px;padding:0;list-style:none;display:grid;gap:12px;color:var(--muted);font-size:.85rem}
.audience li {padding-left:19px;position:relative}
.audience li::before {content:'✓';position:absolute;left:0;color:var(--accent-ink);font-size:.75rem}
.audience .btn {margin-top:auto;align-self:flex-start}
.access-note {font-size:.8rem;line-height:1.7;color:var(--muted);margin-top:30px;max-width:95ch}
.account-strip {display:flex;align-items:center;justify-content:space-between;gap:32px;margin-top:56px;padding:32px 0;border-block:1px solid var(--line)}
.account-strip h3 {font-size:1.3rem}
.account-strip p {color:var(--muted);font-size:.9rem;margin-top:9px}
.account-strip .btn {flex:none}
.faq-layout {display:grid;grid-template-columns:.75fr 1.25fr;gap:100px}
.faq {border-bottom:1px solid var(--line)}
.faq:first-child {border-top:1px solid var(--line)}
.faq summary {cursor:pointer;list-style:none;position:relative;padding:23px 48px 23px 0;font-size:1rem;font-weight:530;line-height:1.55}
.faq summary::-webkit-details-marker {display:none}
.faq summary::after {content:'+';position:absolute;right:5px;top:19px;font-size:1.6rem;font-weight:350;color:var(--accent-ink)}
.faq[open] summary::after {content:'−'}
.faq p {color:var(--muted);font-size:.92rem;padding:0 44px 26px 0;max-width:75ch;line-height:1.75}
.faq p a {color:var(--accent-ink)}
.contact-section {position:relative;background:var(--surface)}
.contact-grid {display:grid;grid-template-columns:1.1fr .9fr;gap:96px;align-items:center}
.contact-grid>div {min-width:0}
.contact-grid p {color:var(--muted);margin-top:26px;max-width:52ch;font-size:1rem;line-height:1.75}
.contact-card {position:relative;padding:42px 0 42px 56px;border-left:1px solid var(--line-soft)}
.contact-card h3 {color:var(--muted);font-size:.82rem;font-weight:520;letter-spacing:0}
.contact-address {display:inline-block;font-size:clamp(1.55rem,2.7vw,2.4rem);font-weight:500;letter-spacing:-.035em;text-decoration:none;margin-top:22px;overflow-wrap:anywhere}
.contact-address:hover {color:var(--accent-ink)}
.contact-card .btn {margin-top:30px}
.contact-card p {font-size:.8rem;max-width:46ch;margin-top:20px}
.contact-orbit {pointer-events:none;position:absolute;right:7%;top:4%;width:300px;height:300px;border:1px solid var(--line-soft);border-radius:50%;opacity:.6}
.contact-orbit::before {content:'';position:absolute;inset:34px;border:1px solid var(--line-soft);border-radius:50%}
.contact-orbit::after {content:'';position:absolute;width:9px;height:9px;top:52px;right:38px;border-radius:50%;background:var(--accent)}
footer {padding:52px 0 30px}
.footer-main {display:flex;align-items:flex-start;justify-content:space-between;gap:64px}
.footer-main p {font-size:.8rem;color:var(--muted);margin-top:15px;max-width:40ch}
.footer-links {display:flex;flex-wrap:wrap;gap:14px 28px;max-width:600px;justify-content:flex-end;color:var(--muted);font-size:.8rem;padding-top:8px}
.footer-links a {text-decoration:none}
.footer-links a:hover {color:var(--text)}
.footer-meta {display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px 24px;margin-top:46px;border-top:1px solid var(--line-soft);padding-top:22px;color:var(--muted);font-size:.68rem}
/* Content stays visible without JS. Enable motion only after installing observers. */
.reveal {opacity:1;transform:none}
.motion-ready .reveal {opacity:0;transform:translateY(28px);transition:opacity .75s var(--ease),transform .75s var(--ease);transition-delay:var(--reveal-delay,0ms)}
.motion-ready .reveal.is-visible {opacity:1;transform:none}
@media(max-width:1200px) {
  .wrap {width:calc(100% - 64px)}
  .header-in {gap:18px;padding-inline:22px}
  .desktop-nav {gap:18px}
  .hero-grid {grid-template-columns:1.06fr .94fr;gap:12px}
  .scene-shell {margin-right:-16px}
  .section-head {gap:44px}
  .feature-grid,.step-grid {gap:30px}
  .evidence-grid,.faq-layout,.contact-grid {gap:56px}
  .contact-card {padding-left:34px}
}
@media(max-width:1080px) {
  .desktop-nav {display:none}
  .tools {margin-left:auto}
  .mobile-nav {display:block}
  .hero h1 {font-size:clamp(3.5rem,6.8vw,4.9rem)}
  .audience {padding-right:8px}
  .audience.recommended {padding:26px}
  .feature-grid {grid-template-columns:repeat(2,minmax(0,1fr))}
  .feature:first-child,.feature-wide {grid-column:span 2}
}
@media(max-width:900px) {
  .hero-grid {grid-template-columns:1fr;gap:25px}
  .hero h1 {max-width:15ch;font-size:clamp(3.5rem,8.5vw,5.6rem)}
  .lede {max-width:58ch}
  .scene-shell {margin:0 auto;width:100%;max-width:760px}
  #network-stage {height:500px}
  .scene-caption {max-width:74ch}
  .section-head {grid-template-columns:1fr;gap:28px;margin-bottom:48px}
  .section-intro {max-width:63ch}
  .evidence-grid,.faq-layout,.contact-grid {grid-template-columns:1fr;gap:44px}
  .evidence-grid .section-intro {max-width:60ch}
  .contact-card {border-left:0;border-top:1px solid var(--line-soft);padding:36px 0 0}
  .contact-card p {max-width:64ch}
  .contact-orbit {width:190px;height:190px;top:auto;bottom:6%;right:3%}
  .footer-main {gap:35px}
  .footer-links {max-width:380px}
}
@media(max-width:720px) {
  .wrap {width:calc(100% - 40px)}
  .site-header {top:10px;width:calc(100% - 20px);margin-top:10px;border-radius:20px}
  .header-in {min-height:68px;padding:10px 16px;gap:9px}
  .brand {font-size:1.25rem;gap:8px}
  .brand svg {width:25px;height:25px}
  .tool {min-width:36px}
  .login-top {padding-inline:14px;font-size:.75rem}
  .mobile-nav {padding-inline:20px}
  .mobile-links {grid-template-columns:repeat(2,minmax(0,1fr))}
  .hero {padding-top:54px}
  .hero-tail {align-items:flex-start;flex-direction:column;gap:24px;margin-top:35px}
  .hero-bottom {grid-template-columns:1fr;gap:24px;margin-top:38px}
  .hero-bottom p {max-width:62ch}
  .section {padding-block:76px}
  .step-grid {grid-template-columns:1fr;gap:34px}
  .step-num {margin-bottom:23px}
  .step h3 {max-width:none}
  .step p {max-width:65ch}
  .step-foot {margin-top:19px}
  .feature-grid {gap:15px 30px}
  .feature {padding-bottom:26px}
  .feature h3 {font-size:1.3rem}
  .mining-note {grid-template-columns:1fr;gap:20px}
  .audience-grid {grid-template-columns:1fr;gap:28px}
  .audience,.audience.recommended {padding:27px 0}
  .audience.recommended {padding:30px}
  .audience ul {grid-template-columns:1fr}
  .account-strip {flex-direction:column;align-items:flex-start;gap:24px;margin-top:36px}
  .footer-main {flex-direction:column;gap:25px}
  .footer-links {justify-content:flex-start;max-width:100%}
}
@media(max-width:480px) {
  html {scroll-padding-top:180px}
  h2 {font-size:clamp(2rem,9vw,2.65rem)}
  .header-in {flex-wrap:wrap}
  .login-top {width:100%;min-height:42px}
  .tools {gap:0}
  .hero {padding-top:42px}
  .hero h1 {font-size:clamp(2.65rem,10.8vw,3.5rem);max-width:14ch}
  .hero-index {margin-bottom:20px}
  .hero .eyebrow {margin-bottom:20px}
  .lede {margin-top:24px;font-size:.98rem}
  .actions {display:grid;grid-template-columns:1fr;margin-top:28px}
  .actions .btn {width:100%}
  #network-stage {height:380px}
  .scene-controls {padding-inline:0;gap:8px}
  .scene-mode {padding-inline:13px;min-height:40px}
  .scene-caption {padding-inline:0;margin-top:12px}
  .scene-label {left:6px;top:10px}
  .scene-label-voltage {left:auto;right:6px}
  .scene-readout {display:none}
  .standards {gap:10px 17px;font-size:.68rem}
  .section {padding-block:64px}
  .section-head {margin-bottom:34px}
  .feature-grid {grid-template-columns:1fr;gap:8px}
  .feature:first-child,.feature-wide {grid-column:auto}
  .feature:first-child h3,.feature-wide h3 {font-size:1.85rem}
  .feature h3 {font-size:1.42rem}
  .feature-ref,.feature-number {margin-bottom:18px}
  .evidence-list li {grid-template-columns:34px minmax(0,1fr);gap:14px}
  .evidence-icon {width:33px;height:33px}
  .audience.recommended {padding:27px 22px}
  .faq summary {font-size:.92rem;padding-right:35px}
  .faq p {padding-right:12px}
  .contact-address {font-size:1.85rem}
  .contact-orbit {display:none}
  .contact-card .btn {width:100%}
  .footer-links {gap:12px 24px}
  .footer-meta {margin-top:30px}
}
@media(prefers-reduced-motion:reduce) {
  html {scroll-behavior:auto}
  *,*::before,*::after {animation:none!important;transition:none!important}
  .motion-ready .reveal {opacity:1!important;transform:none!important}
  .btn:hover {transform:none}
}
@media print {
  :root,:root[data-theme='dark'] {
    --bg:#fff;--surface:#fff;--sunken:#fff;--hover:#fff;--line:#999;--line-soft:#ccc;
    --text:#111;--muted:#444;--accent:#2858cf;--accent-ink:#2858cf;--cyan:#b74d22;--ok:#237455;color-scheme:light;
  }
  .site-header,.skip,.actions,.scene-shell,.scene-controls,.contact-orbit,.page-progress {display:none!important}
  main {overflow:visible}
  .wrap {width:100%}
  body {font-size:10pt;background:#fff;color:#111}
  .hero,.section {padding-block:25px}
  h1,.hero h1 {font-size:32pt;max-width:none}
  h2 {font-size:25pt}
  h3 {font-size:15pt}
  .hero-grid,.section-head,.evidence-grid,.faq-layout,.contact-grid {grid-template-columns:1fr;gap:20px}
  .step-grid,.feature-grid,.audience-grid {gap:20px}
  .step,.feature,.audience,.faq,.evidence-list li {break-inside:avoid}
  .audience.recommended {box-shadow:none;border:1px solid #ccc;border-radius:0}
  .feature:first-child,.feature-wide {grid-column:auto}
  .motion-ready .reveal {opacity:1;transform:none}
  .btn {background:none;border:0;color:#111;padding:0;min-height:0}
  .footer-main {gap:20px}
  .footer-meta {font-size:8pt}
}

/* ---- 0.5: przewagi, demo „Wstaw zwarcie", ikony możliwości, zakładki norm, pas wezwania ---- */
.visually-hidden {position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.proof {padding:8px 0 clamp(40px,5vw,72px)}
.proof-grid {display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.proof-item {padding:26px 24px 24px;border-radius:22px;background:var(--surface);box-shadow:var(--shadow);transition:transform .25s var(--ease),box-shadow .25s}
.proof-item:hover {transform:translateY(-3px);box-shadow:0 18px 50px rgba(28,42,67,.09)}
.proof-ico,.feature-ico {display:inline-grid;place-items:center;flex:none;width:42px;height:42px;border-radius:13px;background:var(--hover);color:var(--accent-ink);transition:background-color .25s,color .25s}
.proof-ico svg,.feature-ico svg {width:22px;height:22px;overflow:visible}
.proof-item h3 {font-size:1.06rem;margin:18px 0 8px;letter-spacing:-.02em;line-height:1.3}
.proof-item p {font-size:.84rem;color:var(--muted);line-height:1.65}
.proof-item .draw,.feature .draw {stroke-dasharray:60;stroke-dashoffset:0}
.proof-item:hover .draw,.feature:hover .draw {animation:cx-draw .9s var(--ease) both}
.feature-number {display:flex!important;align-items:center;justify-content:space-between;gap:12px}
.feature {transition:border-color .25s}
.feature:hover {border-top-color:var(--accent)}
.feature:hover .feature-ico {background:var(--accent);color:var(--on-accent)}

.fault-demo {background:var(--surface);border-radius:28px;box-shadow:var(--shadow);padding:30px}
.fd-grid-layout {display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:40px;align-items:start}
.fd-figure {min-width:0}
.fd-svg {display:block;width:100%;height:auto;max-height:600px;background:var(--cx-bg);border:1px solid var(--line-soft);border-radius:20px}
.fd-wires path {stroke:var(--line);stroke-width:2.5}
.fd-wires path.is-live {stroke:var(--cx-dc);stroke-width:3.6;stroke-dasharray:10 8;animation:fd-flow .7s linear infinite}
@keyframes fd-flow {to{stroke-dashoffset:-18}}
.fd-static {stroke:var(--text);stroke-width:1.8}
.fd-bus {stroke-width:5;stroke-linecap:round}
.fd-text text {font:500 12px var(--font-ui);fill:var(--text)}
.fd-text .fd-sub {font-size:10.5px;fill:var(--muted)}
.fd-node {cursor:pointer;outline:none}
.fd-hit {fill:transparent;stroke:none}
.fd-dot {fill:var(--surface);stroke:var(--accent);stroke-width:2.5}
.fd-node:hover .fd-dot {fill:var(--hover)}
.fd-node:focus-visible .fd-hit {stroke:var(--focus);stroke-width:2.5}
.fd-node.is-on .fd-dot {fill:var(--cx-dc);stroke:var(--cx-dc)}
.fd-label {font:700 13px var(--font-ui);fill:var(--text)}
.fd-bolt {fill:var(--cx-flash);opacity:0;transform-box:fill-box;transform-origin:center}
.fd-node.is-on .fd-bolt {opacity:1;animation:fd-pop .45s var(--ease)}
@keyframes fd-pop {from{transform:scale(.2)}to{transform:scale(1)}}
.fd-picker {margin-top:14px}
.fd-kicker {color:var(--accent-ink);font-size:.7rem;font-weight:620;letter-spacing:.06em;text-transform:uppercase}
.fd-name {font-size:1.32rem;margin-top:10px}
.fd-big {display:flex;align-items:baseline;gap:16px;margin-top:22px;padding:18px 24px;border-radius:18px;background:var(--sunken)}
.fd-big span {font:italic 1.25rem/1 'Cambria Math','Times New Roman',serif;color:var(--muted)}
.fd-big strong {font-size:clamp(2.2rem,4vw,3.3rem);line-height:1.05;letter-spacing:-.045em;font-weight:620;font-variant-numeric:tabular-nums;color:var(--text)}
.fd-values {display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px 18px;margin:22px 0 0}
.fd-values dt {font-size:.7rem;color:var(--muted)}
.fd-values dd {margin:4px 0 0;font-weight:600;font-variant-numeric:tabular-nums;white-space:nowrap}
.fd-bars {margin-top:26px;display:grid;gap:9px}
.fd-bars p {font-size:.74rem;color:var(--muted);margin-bottom:2px}
.fd-bar {display:grid;grid-template-columns:28px minmax(0,1fr) 78px;align-items:center;gap:10px;font-size:.76rem}
.fd-bar span {font-weight:650}
.fd-bar i {display:block;height:10px;border-radius:6px;background:var(--line-soft);position:relative;overflow:hidden}
.fd-bar i::after {content:'';position:absolute;inset:0 auto 0 0;width:var(--w);background:var(--accent);border-radius:6px}
.fd-bar.is-on i::after {background:var(--cx-dc)}
.fd-bar.is-on span,.fd-bar.is-on b {color:var(--fault-ink)}
.fd-bar b {font-weight:600;text-align:right;font-variant-numeric:tabular-nums}
.fd-note {margin-top:24px;font-size:.74rem;color:var(--muted);line-height:1.7}

.std-tabs {margin-top:64px;border-radius:26px;background:var(--surface);box-shadow:var(--shadow);padding:10px 10px 32px}
.std-tablist {display:flex;flex-wrap:wrap;gap:4px;padding:4px;background:var(--sunken);border-radius:18px}
.std-tablist [role='tab'] {flex:1 1 180px;min-height:50px;border:0;border-radius:14px;background:transparent;color:var(--muted);font-weight:620;font-size:.84rem;letter-spacing:-.01em}
.std-tablist [role='tab']:hover {color:var(--text)}
.std-tablist [role='tab'][aria-selected='true'] {background:var(--surface);color:var(--accent-ink);box-shadow:0 2px 10px rgba(28,42,67,.07)}
.std-panel {padding:30px 26px 0}
.std-panel h3 {font-size:1.4rem}
.std-panel ul {margin:20px 0 0;padding:0;list-style:none;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px 36px}
.std-panel li {position:relative;padding-left:24px;color:var(--muted);font-size:.9rem;line-height:1.6}
.std-panel li::before {content:'';position:absolute;left:0;top:.5em;width:9px;height:9px;border-radius:50%;border:2px solid var(--accent)}
.std-limit {margin-top:20px;font-size:.78rem;color:var(--muted)}
.std-panel .text-link {margin-top:14px}

.cta-band {padding:clamp(56px,7vw,100px) 0 0}
.cta-band-in {position:relative;overflow:hidden;display:grid;grid-template-columns:minmax(0,1.3fr) auto;gap:40px;align-items:center;padding:clamp(32px,4.5vw,58px);border-radius:30px;background:linear-gradient(130deg,#121f3d 0%,#1d3a8f 58%,#2f63e8 100%);color:#fff;isolation:isolate}
.cta-band-in::after {content:'';position:absolute;z-index:-1;right:-30px;bottom:-26px;width:520px;height:240px;opacity:.22;pointer-events:none;background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 520 240' fill='none' stroke='white' stroke-width='3'%3E%3Cpath d='M0 120C20 120 30 20 52 20S80 220 104 200 130 50 156 60 184 180 208 172 236 84 260 92 288 156 312 150 340 104 364 108 392 138 416 136 444 114 468 116 496 128 520 126'/%3E%3C/svg%3E") no-repeat center/contain}
.cta-band .eyebrow {color:#b9cbff}
.cta-band h2 {color:#fff;max-width:22ch}
.cta-band p {margin-top:18px;max-width:56ch;color:#d5def4;line-height:1.75}
.cta-band-actions {display:flex;flex-direction:column;gap:12px;min-width:240px}
.cta-band .btn {border-color:rgba(255,255,255,.5);color:#fff}
.cta-band .btn:hover {background:rgba(255,255,255,.1);border-color:#fff;color:#fff}
.cta-band .btn-primary {background:#fff;border-color:#fff;color:#14244a}
.cta-band .btn-primary:hover {background:#e8eefc;border-color:#e8eefc;color:#14244a}

@media(max-width:1080px) {
  .proof-grid {grid-template-columns:repeat(2,minmax(0,1fr))}
  .fd-grid-layout {grid-template-columns:1fr;gap:28px}
  .fd-svg {max-height:520px}
}
@media(max-width:820px) {
  .cta-band-in {grid-template-columns:1fr}
  .cta-band-actions {flex-direction:row;flex-wrap:wrap;min-width:0}
  .std-panel ul {grid-template-columns:1fr}
}
@media(max-width:560px) {
  .proof-grid {grid-template-columns:1fr}
  .fault-demo {padding:18px;border-radius:22px}
  .fd-values {grid-template-columns:repeat(2,minmax(0,1fr))}
  .fd-text text {font-size:15px}
  .fd-text .fd-sub {font-size:12px}
  .fd-label {font-size:16px}
  .std-tabs {margin-top:44px;padding:8px 8px 26px}
  .std-panel {padding:24px 14px 0}
  .cta-band-actions .btn {width:100%}
}
@media(prefers-reduced-motion:reduce) {
  .fd-wires path.is-live {animation:none;stroke-dasharray:none}
  .proof-item:hover {transform:none}
}
@media print {
  .proof,.fault-demo,.cta-band {display:none!important}
  .std-panel[hidden] {display:block!important}
}

/* ---- 0.6: scena „Od elektrowni do odbiornika" w nagłówku ---- */
.hero-grid {grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:30px}
.hero h1 {font-size:clamp(3rem,5.2vw,5rem)}
.energy-shell {margin-right:-24px}
.energy-shell::before {inset:4% -4% 18%}
.energy-stage {position:relative;width:100%;height:clamp(460px,45vw,720px);touch-action:pan-y;border-radius:28px;overflow:hidden}
.energy-stage canvas,.energy-fallback {position:absolute;inset:0;display:block;width:100%;height:100%}
.energy-stage.is-webgl .energy-fallback {display:none}
.energy-labels {position:absolute;inset:0;pointer-events:none;overflow:hidden}
.energy-label {position:absolute;left:0;top:0;padding:3px 9px;border-radius:999px;background:var(--header-bg);box-shadow:0 2px 12px rgba(28,42,67,.1);color:var(--text);font-size:.66rem;font-weight:620;line-height:1.4;white-space:nowrap;backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);will-change:transform;transition:background-color .3s,color .3s}
.energy-label.is-minor {font-size:.6rem;padding:2px 7px;font-weight:680}
.energy-label.is-net {background:transparent;box-shadow:none;color:var(--muted);text-transform:uppercase;letter-spacing:.09em;font-size:.58rem;backdrop-filter:none;-webkit-backdrop-filter:none}
.energy-label.is-hot {background:var(--fault);color:#fff}
.energy-hud {display:grid;grid-template-columns:minmax(0,1.55fr) repeat(3,minmax(0,1fr));gap:14px 22px;align-items:end;margin:14px 18px 0;padding:16px 20px;border-radius:20px;background:var(--surface);box-shadow:var(--shadow)}
.energy-hud-kicker {font:.66rem/1.4 var(--font-mono);letter-spacing:.04em;color:var(--accent-ink);font-variant-numeric:tabular-nums}
.energy-hud-title {font-weight:640;font-size:1rem;letter-spacing:-.02em;line-height:1.35;margin-top:5px}
.energy-hud-detail {font-size:.72rem;color:var(--muted);line-height:1.55;margin-top:4px}
.energy-stage[data-energy-state='fault'] ~ .energy-hud .energy-hud-kicker {color:var(--fault-ink)}
.energy-meters {grid-column:span 3;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px 22px;align-items:end}
.energy-meter span {display:block;font-size:.64rem;color:var(--muted);line-height:1.35}
.energy-meter b {display:block;margin-top:5px;font-size:1.05rem;font-weight:660;letter-spacing:-.02em;font-variant-numeric:tabular-nums;white-space:nowrap}
.energy-meter i {display:block;height:5px;margin-top:7px;border-radius:3px;background:var(--line-soft);overflow:hidden}
.energy-meter em {display:block;height:100%;width:calc(var(--v,0) * 100%);border-radius:3px;background:var(--accent);transition:background-color .3s}
.energy-meter.is-alert b {color:var(--fault-ink)}
.energy-meter.is-alert em {background:var(--fault)}
.energy-meter-switch b::before {content:'';display:inline-block;width:9px;height:9px;margin-right:7px;border-radius:50%;background:var(--ok);vertical-align:1px}
.energy-meter-switch.is-open b {color:var(--fault-ink)}
.energy-meter-switch.is-open b::before {background:var(--fault)}
.energy-controls .scene-mode {display:inline-flex;align-items:center}
.energy-num {display:inline-grid;place-items:center;width:19px;height:19px;margin-right:8px;border-radius:50%;background:var(--line-soft);color:var(--muted);font-size:.62rem;font-weight:700}
.energy-controls .scene-mode[aria-pressed='true'] .energy-num {background:var(--accent);color:var(--on-accent)}
.energy-controls .scene-mode[data-energy-go='fault'][aria-pressed='true'] {color:var(--fault-ink)}
.energy-controls .scene-mode[data-energy-go='fault'][aria-pressed='true'] .energy-num {background:var(--fault);color:#fff}
.energy-progress {height:3px;margin:12px 18px 0;border-radius:2px;background:var(--line-soft);overflow:hidden}
.energy-progress span {display:block;height:100%;background:var(--accent);transform-origin:left center;transform:scaleX(0)}
/* schemat zastępczy (bez WebGL lub bez JavaScriptu) */
.ef-zone rect {fill:var(--sunken)}
.ef-obj circle,.ef-obj rect,.ef-obj path {fill:var(--surface);stroke:var(--text);stroke-width:2}
.ef-obj .ef-red {fill:var(--fault);stroke:none}
.ef-obj .ef-tower,.ef-rotor path {fill:none}
.ef-rotor {transform-box:view-box;transform-origin:556px 52px;animation:ef-spin 3.2s linear infinite}
.ef-rotor-2 {transform-origin:600px 78px;animation-duration:2.6s}
@keyframes ef-spin {to{transform:rotate(360deg)}}
.ef-wires path {fill:none;stroke:var(--line);stroke-width:3;stroke-linecap:round}
.ef-wires .ef-bus {stroke:var(--text);stroke-width:6}
.ef-flows .fl {fill:none;stroke:var(--accent);stroke-width:4;stroke-linecap:round;stroke-dasharray:1 13;animation:ef-dash 2s linear infinite;transition:stroke .3s,opacity .3s}
@keyframes ef-dash {to{stroke-dashoffset:-28}}
.energy-fallback[data-state='fault'] .fl-hot {stroke:var(--fault)}
.energy-fallback[data-state='trip'] .fl-M3 {opacity:0}
.ef-bulb {fill:#ffd36b;stroke:var(--text);stroke-width:2}
.ef-bulb-glow {opacity:var(--bulb,.9);transition:opacity .4s}
.ef-q3-base {stroke:var(--text);stroke-width:3}
.ef-q3-blade {fill:none;stroke:var(--text);stroke-width:3.5;stroke-linecap:round;transform-box:view-box;transform-origin:220px 412px;transition:transform .35s}
.q3-open .ef-q3-blade {transform:rotate(-38deg)}
.ef-bolt {fill:#ffb020;opacity:0;transition:opacity .2s}
.energy-fallback[data-state='fault'] .ef-bolt {opacity:1}
.ef-text text {font:600 13px var(--font-ui);fill:var(--text)}
@media(max-width:1200px) {
  .hero-grid {grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);gap:18px}
  .energy-shell {margin-right:-16px}
  .energy-hud {grid-template-columns:1fr}
  .energy-meters {grid-column:auto}
}
@media(max-width:900px) {
  .hero-grid {grid-template-columns:1fr}
  .energy-shell {margin:0 auto;width:100%;max-width:820px}
  .energy-stage {height:min(560px,92vw)}
}
@media(max-width:480px) {
  .energy-stage {height:400px;border-radius:20px}
  .energy-hud {margin:12px 0 0;padding:14px 16px;gap:12px 14px}
  .energy-meter b {font-size:.95rem}
  .energy-controls .scene-mode {padding-inline:11px;font-size:.7rem}
  .energy-num {margin-right:5px}
  .energy-progress {margin-inline:0}
}
@media(prefers-reduced-motion:reduce) {
  .ef-rotor,.ef-flows .fl {animation:none}
}
@media print {
  .energy-controls,.energy-progress {display:none!important}
}