:root{
  --navy:#0e2a47;--navy2:#16385c;--ink:#1b2b3a;--mut:#5b6b7b;
  --amber:#f5a623;--amber2:#e08c00;--bg:#f7f9fb;--card:#ffffff;
  --line:#e3e9ef;--good:#1a7f4e;--warn:#b54708;
  --r:12px;--shadow:0 1px 3px rgba(14,42,71,.08),0 8px 24px rgba(14,42,71,.06);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--ink);line-height:1.65;font-size:16.5px}
img,svg{max-width:100%}
a{color:var(--navy2)}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}

/* header */
header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;text-decoration:none}
.logo img{width:165px;height:auto;display:block}
.nav-links{display:flex;gap:22px;align-items:center}
.nav-links a{text-decoration:none;color:var(--ink);font-weight:600;font-size:15px}
.nav-links a:hover{color:var(--amber2)}
.nav-links a.cta{background:var(--navy);color:#fff;padding:9px 16px;border-radius:8px}
.nav-links a.cta:hover{background:var(--navy2);color:#fff}

/* hero */
.hero{background:linear-gradient(160deg,var(--navy) 0%,var(--navy2) 70%);color:#fff;padding:64px 0 56px}
.hero h1{font-size:clamp(28px,4.5vw,44px);line-height:1.15;letter-spacing:-.5px;max-width:760px}
.hero h1 em{color:var(--amber);font-style:normal}
.hero p{margin-top:16px;font-size:18px;color:#cdd9e6;max-width:640px}
.hero .btns{margin-top:28px;display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;padding:13px 22px;border-radius:9px;font-weight:700;text-decoration:none;font-size:16px}
.btn.gold{background:var(--amber);color:#20242b}
.btn.gold:hover{background:var(--amber2)}
.btn.ghost{border:1.5px solid #56728f;color:#fff}
.btn.ghost:hover{border-color:var(--amber);color:var(--amber)}
.hero .stat-row{margin-top:36px;display:flex;gap:34px;flex-wrap:wrap}
.hero .stat b{display:block;font-size:26px;color:var(--amber)}
.hero .stat span{font-size:13.5px;color:#a9bccd}

/* sections */
section{padding:52px 0}
h2{font-size:clamp(22px,3vw,30px);color:var(--navy);letter-spacing:-.3px;margin-bottom:10px}
.sub{color:var(--mut);max-width:700px;margin-bottom:26px}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:18px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:22px;box-shadow:var(--shadow)}
.card h3{color:var(--navy);font-size:17.5px;margin-bottom:8px}
.card p{font-size:15px;color:var(--mut)}
.card .tag{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.4px;text-transform:uppercase;color:var(--amber2);margin-bottom:8px}

/* tool */
.toolbar{display:flex;gap:12px;flex-wrap:wrap;margin:20px 0 14px}
.toolbar input[type=search]{flex:1;min-width:220px;padding:12px 14px;border:1.5px solid var(--line);border-radius:9px;font-size:16px;background:#fff}
.toolbar input[type=search]:focus{outline:2px solid var(--amber);border-color:var(--amber)}
.chips{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}
.chip{border:1.5px solid var(--line);background:#fff;color:var(--ink);border-radius:20px;padding:7px 14px;font-size:13.5px;font-weight:600;cursor:pointer}
.chip.on{background:var(--navy);border-color:var(--navy);color:#fff}
.tblwrap{overflow-x:auto;background:#fff;border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow)}
table{width:100%;border-collapse:collapse;font-size:15px;min-width:680px}
th{background:#f0f4f8;color:var(--navy);text-align:left;padding:11px 14px;font-size:13px;text-transform:uppercase;letter-spacing:.4px;position:sticky;top:0}
th.num,td.num{text-align:right;font-variant-numeric:tabular-nums}
td{padding:11px 14px;border-top:1px solid var(--line);vertical-align:top}
td .note{display:block;font-size:12.5px;color:var(--mut);margin-top:2px}
td b.watts{color:var(--navy);font-size:15.5px}
.surge{color:var(--warn);font-weight:700}
.nosurge{color:var(--mut)}
tr.sel{background:#fff8ea}
td.pick{text-align:center}
td.pick input{width:18px;height:18px;accent-color:var(--amber2);cursor:pointer}

/* totals bar */
#totals{position:sticky;bottom:0;background:var(--navy);color:#fff;border-radius:12px 12px 0 0;padding:14px 20px;display:none;gap:26px;flex-wrap:wrap;align-items:center;box-shadow:0 -6px 24px rgba(14,42,71,.25)}
#totals.show{display:flex}
#totals b{color:var(--amber);font-size:20px;font-variant-numeric:tabular-nums}
#totals .lbl{font-size:12px;color:#a9bccd;display:block;line-height:1.3}
#totals .verdict{font-size:14px;font-weight:600;flex:1;min-width:200px}
#totals button{background:none;border:1px solid #56728f;color:#cdd9e6;border-radius:7px;padding:6px 12px;cursor:pointer;font-size:13px}

/* prose + faq */
.prose{max-width:760px}
.prose p{margin-bottom:14px}
.prose h2{margin-top:34px}
.prose h3{color:var(--navy);margin:22px 0 8px;font-size:19px}
.prose ul{margin:0 0 14px 22px}
.prose li{margin-bottom:6px}
.faq{max-width:760px}
.faq details{background:#fff;border:1px solid var(--line);border-radius:10px;margin-bottom:10px;padding:0 18px}
.faq summary{cursor:pointer;font-weight:700;color:var(--navy);padding:15px 0;font-size:16px;list-style:none;position:relative;padding-right:28px}
.faq summary::after{content:"+";position:absolute;right:2px;top:12px;font-size:20px;color:var(--amber2)}
.faq details[open] summary::after{content:"–"}
.faq details p{padding-bottom:16px;color:var(--ink);font-size:15.5px}

.notice{background:#fff8ea;border:1px solid #f1d9a7;border-radius:10px;padding:14px 18px;font-size:14.5px;color:#6b5314;margin:18px 0}

/* footer */
footer{background:var(--navy);color:#a9bccd;margin-top:40px;padding:44px 0 30px;font-size:14.5px}
footer .cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:26px;margin-bottom:26px}
footer img{width:165px;height:auto;margin-bottom:12px}
footer h4{color:#fff;font-size:14px;text-transform:uppercase;letter-spacing:.5px;margin-bottom:10px}
footer a{color:#cdd9e6;text-decoration:none;display:block;margin-bottom:7px}
footer a:hover{color:var(--amber)}
footer .fine{border-top:1px solid #2a4a6d;padding-top:18px;font-size:13px}

@media(max-width:720px){
  .nav-links{gap:14px}
  .nav-links a:not(.cta){display:none}
  .hero{padding:44px 0 40px}
  section{padding:38px 0}
  #totals{gap:16px;padding:12px 14px}
  #totals b{font-size:17px}
  table{min-width:0;font-size:13.5px}
  th,td{padding:9px 8px}
  th:nth-child(3),td:nth-child(3){display:none}
  td b.watts{font-size:14.5px}
  td .note{font-size:11.5px}
}