/* DS Electrical wave 2: consumer unit "upgrade on scroll" (.w2-cu-)
   Old rewireable fuse box -> steel all-RCBO consumer unit, in five stages.
   Without JS, or under reduced motion, the illustration shows its finished state
   (data-stage="5" in the markup) and the stage captions read as a plain list.
   w2-cu.js adds .w2-cu--live to enable the sticky panel and scroll-driven stages. */
.w2-cu{--y:#2f7bff;--bg:#08090c;--bg2:#0d0f14;--deep:#0a0c11;--ink:#f4f6f8;--muted:#9aa3ad;--line:rgba(255,255,255,.11);--mono:'Archivo',system-ui,sans-serif;--top:var(--w2-cu-top,88px);background:var(--bg);color:var(--ink);font-family:'Archivo',system-ui,sans-serif;padding:72px 0}
.w2-cu *,.w2-cu *::before,.w2-cu *::after{box-sizing:border-box}
.w2-cu-in{max-width:1240px;margin:0 auto;padding:0 32px}
.w2-cu-head{max-width:62ch;margin-bottom:36px}
.w2-cu-eyebrow{font-size:12px;letter-spacing:.24em;text-transform:uppercase;color:var(--y);font-weight:700;margin:0 0 10px}
.w2-cu-h{font-size:clamp(26px,3vw,40px);line-height:1.08;letter-spacing:-.025em;font-weight:800;margin:0}
.w2-cu-lead{font-size:16px;line-height:1.55;color:var(--muted);margin:12px 0 0}

.w2-cu-grid{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:56px;align-items:start}
.w2-cu-panel{order:2;min-width:0;background:var(--bg2);border:1px solid var(--line);border-radius:18px;padding:16px}
.w2-cu-steps{order:1;list-style:none;margin:0;padding:0;min-width:0}

/* panel meta: stage counter + breaker rail */
.w2-cu-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:30px;margin:0 2px 12px}
.w2-cu-now{font-family:var(--mono);font-size:.75rem;letter-spacing:.08em;color:var(--muted);margin:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.w2-cu-now b{color:var(--y);font-weight:500}
.w2-cu-rail{display:flex;gap:4px;padding:4px 5px;border-radius:6px;background:var(--deep);border:1px solid var(--line);margin:0;list-style:none}
.w2-cu-rail[hidden]{display:none}
.w2-cu-rail button{position:relative;display:block;width:14px;height:22px;padding:0;border:0;border-radius:3px;background:#1f242e;cursor:pointer}
.w2-cu-rail button::after{content:"";position:absolute;left:2px;right:2px;top:12px;height:8px;border-radius:2px;background:#64748b;transition:top .25s ease,background .25s ease}
.w2-cu-rail button.on::after{top:2px;background:var(--y)}
.w2-cu-rail button:focus-visible{outline:2px solid var(--y);outline-offset:2px}
.w2-cu-rail button::before{content:"";position:absolute;inset:-10px -3px}

.w2-cu-svg{display:block;width:100%;height:auto;border-radius:12px;background:radial-gradient(120% 90% at 30% 15%,#141824,var(--deep))}

/* steps */
.w2-cu-step{padding:26px 0;border-top:1px solid var(--line)}
.w2-cu-step:first-child{border-top:0;padding-top:0}
.w2-cu-n{display:block;font-family:var(--mono);font-size:.75rem;letter-spacing:.12em;text-transform:uppercase;color:var(--y);margin:0 0 8px}
.w2-cu-t{font-size:clamp(20px,2vw,26px);font-weight:800;letter-spacing:-.015em;line-height:1.15;margin:0 0 10px;outline:none}
.w2-cu-d{font-size:16px;line-height:1.6;color:#cbd2db;margin:0;max-width:52ch}
.w2-cu-t:focus-visible{outline:2px solid var(--y);outline-offset:4px;border-radius:4px}

/* circuit chart (stage 5 caption) */
.w2-cu-chart{width:100%;max-width:440px;margin:18px 0 0;border-collapse:collapse;font-size:14px;background:#f1f4f8;color:#0f172a;border-radius:10px;overflow:hidden}
.w2-cu-chart caption{caption-side:top;text-align:left;font-family:var(--mono);font-size:.75rem;letter-spacing:.1em;text-transform:uppercase;color:#cbd2db;background:var(--bg);padding:0 0 8px}
.w2-cu-chart th,.w2-cu-chart td{padding:7px 12px;text-align:left;border-bottom:1px solid #d5dbe3}
.w2-cu-chart thead th{font-family:var(--mono);font-size:.75rem;letter-spacing:.08em;text-transform:uppercase;font-weight:500;color:#475569;background:#e2e7ee}
.w2-cu-chart tbody tr:last-child td,.w2-cu-chart tbody tr:last-child th{border-bottom:0}
.w2-cu-chart tbody th{font-family:var(--mono);font-weight:500;width:3.5em}
.w2-cu-chart td:last-child{font-family:var(--mono);white-space:nowrap}

/* ---------- SVG: what each stage shows ---------- */
.w2-cu-g{opacity:0;visibility:hidden}
.w2-cu-vis[data-stage="1"] .s1,.w2-cu-vis[data-stage="2"] .s2,.w2-cu-vis[data-stage="3"] .s3,.w2-cu-vis[data-stage="4"] .s4,.w2-cu-vis[data-stage="5"] .s5{opacity:1;visibility:visible;transform:none}
.w2-cu-lev{transform-box:fill-box;fill:#e2e8f0}
.w2-cu-vis[data-stage="3"] .w2-cu-lev,.w2-cu-vis[data-stage="4"] .w2-cu-lev{transform:translateY(18px);fill:#64748b}
.w2-cu .ind{fill:var(--y)}
.w2-cu-vis[data-stage="3"] .ind,.w2-cu-vis[data-stage="4"] .ind{fill:#94a3b8}
.w2-cu .bus{fill:#b87333;filter:drop-shadow(0 0 4px rgba(184,115,51,.6))}
.w2-cu-vis[data-stage="4"] .bus{fill:#8b98ab;filter:none}

/* ---------- live (JS on, motion allowed) ---------- */
.w2-cu--live .w2-cu-panel{position:sticky;top:var(--top)}
.w2-cu--live .w2-cu-svg{max-height:calc(100vh - var(--top) - 96px)}
.w2-cu--live .w2-cu-step{min-height:72vh;display:flex;flex-direction:column;justify-content:center;border-top:0;padding:40px 0;opacity:.38;transition:opacity .35s ease}
.w2-cu--live .w2-cu-step:first-child{padding-top:40px}
.w2-cu--live .w2-cu-step.is-on{opacity:1}
.w2-cu--live .w2-cu-step:last-child{min-height:80vh}
.w2-cu--live .w2-cu-g{transition:opacity .45s ease,transform .6s cubic-bezier(.3,.7,.2,1),visibility 0s linear .6s}
.w2-cu--live .w2-cu-g.rise{transform:translateY(14px)}
.w2-cu--live .w2-cu-g.drop{transform:translateY(-10px)}
.w2-cu--live :is(.w2-cu-vis[data-stage="1"] .s1,.w2-cu-vis[data-stage="2"] .s2,.w2-cu-vis[data-stage="3"] .s3,.w2-cu-vis[data-stage="4"] .s4,.w2-cu-vis[data-stage="5"] .s5){transform:none;transition:opacity .45s ease .12s,transform .6s cubic-bezier(.3,.7,.2,1) .12s,visibility 0s}
.w2-cu--live .w2-cu-lev{transition:transform .32s cubic-bezier(.5,1.6,.4,1),fill .32s ease}
.w2-cu--live .ind,.w2-cu--live .bus{transition:fill .35s ease .2s}
.w2-cu--live .w2-cu-vis[data-stage="5"] .w2-cu-lev{transition-delay:calc(var(--i,0) * 70ms)}

@media (max-width:899px){
 .w2-cu{padding:52px 0}
 .w2-cu-in{padding:0 20px}
 .w2-cu-grid{grid-template-columns:minmax(0,1fr);gap:20px}
 .w2-cu-panel{order:1;padding:10px;border-radius:14px}
 .w2-cu-steps{order:2}
 .w2-cu-meta{margin-bottom:8px}
 .w2-cu--live .w2-cu-panel{top:var(--w2-cu-top-m,80px);z-index:2;box-shadow:0 18px 30px -18px rgba(0,0,0,.9)}
 .w2-cu--live .w2-cu-svg{max-height:36vh}
 .w2-cu--live .w2-cu-step{min-height:64vh;justify-content:flex-start;padding:24px 0}
 .w2-cu--live .w2-cu-step:first-child{padding-top:24px}
 .w2-cu--live .w2-cu-step:last-child{min-height:70vh}
 .w2-cu-d{font-size:15.5px}
}
@media (max-width:380px){.w2-cu-now span{display:none}}
@media (prefers-reduced-motion:reduce){
 .w2-cu *{transition:none!important}
}
.w2-cu-svg text{font-family:var(--mono)}

/* Pass-2 sweeper: phones in landscape keep the drawing in flow; quieter stages stay readable. */
@media (max-width:899px) and (max-height:500px){.w2-cu--live .w2-cu-panel{position:static}}
.w2-cu--live .w2-cu-step{opacity:.62}
.w2-cu--live .w2-cu-step.is-on{opacity:1}