:root{color-scheme:light;--ink:#152b48;--muted:#4c6178;--blue:#1464ed;--green:#127d59;--paper:#f4f8ff;--line:#dce6f1}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.65 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}a{color:#1156ca;text-underline-offset:4px}a:hover{color:#093c91}a:focus-visible{outline:3px solid #edb400;outline-offset:5px;border-radius:3px}.wrap{width:min(1080px,calc(100% - 48px));margin:auto}header{background:#fff;border-bottom:1px solid var(--line)}nav{min-height:88px;display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;padding:18px 0}.brand{display:flex;gap:12px;align-items:center;font-size:21px;font-weight:800;color:var(--ink);text-decoration:none}.mark{width:40px;height:40px;border-radius:13px;background:#ffcd3d;display:grid;place-items:center;font-size:25px}.navlinks{display:flex;gap:24px;font-size:15px}.navlinks a{color:var(--muted);text-decoration:none}.navlinks a[aria-current=page]{color:var(--blue);font-weight:700}main{padding:70px 0 86px}h1,h2,h3{line-height:1.16;letter-spacing:-.035em}h1{font-size:clamp(40px,6vw,68px);max-width:850px;margin:20px 0 24px}h2{font-size:30px;margin:45px 0 16px}h3{font-size:21px;margin:0 0 12px}.eyebrow{font-size:13px;text-transform:uppercase;letter-spacing:.12em;color:var(--green);font-weight:800}.lead{font-size:21px;color:var(--muted);max-width:770px}.badge{display:inline-block;background:#fff0ba;border:1px solid #efd47c;padding:6px 14px;border-radius:30px;font-size:13px;font-weight:700}.actions{display:flex;gap:16px;align-items:center;flex-wrap:wrap;margin-top:30px}.button{background:var(--blue);color:#fff;padding:12px 22px;border-radius:12px;font-weight:700;text-decoration:none}.button:hover{background:#0e4dbb;color:#fff}.button.secondary{background:#fff;color:var(--blue);border:1px solid var(--line)}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin:48px 0}.card{background:#fff;border:1px solid var(--line);padding:28px;border-radius:20px}.card p{color:var(--muted);margin-bottom:0}.number{font-size:13px;font-weight:800;color:var(--green);display:block;margin-bottom:14px}.note{padding:22px 26px;background:#e7f2ff;border-left:4px solid var(--blue);border-radius:0 14px 14px 0;margin:30px 0}.reading{background:#fff;border:1px solid var(--line);padding:28px;border-radius:20px;margin:42px 0}.flow{display:flex;gap:14px;align-items:center;justify-content:space-between;flex-wrap:wrap}.node{background:#edf6ff;padding:14px 20px;border-radius:13px;font-weight:700}.node.sun{background:#fff2b8}.node.battery{background:#dff5e9}.arrow{font-size:26px;color:var(--blue)}.article{max-width:820px}.article h1{font-size:clamp(38px,5vw,54px)}.article p,.article li{color:#354d65}.article li{padding:3px 0}.article h2{margin-top:40px}.article .date{font-size:14px;color:var(--muted)}details{border-top:1px solid var(--line);padding:20px 0}details:last-child{border-bottom:1px solid var(--line)}summary{font-weight:700;cursor:pointer}details p{color:var(--muted);max-width:860px}.contact{background:var(--ink);color:#fff;padding:36px;border-radius:24px;margin-top:45px}.contact h2{margin-top:0}.contact p{color:#c9d8e9}.contact a{color:#ffe292}footer{border-top:1px solid var(--line);padding:30px 0;font-size:14px;color:var(--muted)}footer .wrap{display:flex;gap:18px;justify-content:space-between;flex-wrap:wrap}.skip{position:absolute;top:-100px;left:16px;background:white;padding:12px;z-index:9}.skip:focus{top:10px}code{font-size:.9em;overflow-wrap:anywhere}.small{font-size:14px;color:var(--muted)}@media(max-width:760px){.wrap{width:calc(100% - 36px)}main{padding:40px 0 55px}.grid{grid-template-columns:1fr;gap:14px;margin:30px 0}.card{padding:24px}.navlinks{gap:18px}.lead{font-size:19px}.contact{padding:26px}.flow{justify-content:flex-start}.node{padding:10px 14px}.reading{padding:22px}}