/* MEPCO Bill Checker - one small stylesheet, no web fonts, no framework */
:root{
  --brand:#0b3d91; --brand-2:#1560d4; --accent:#f5b301; --ink:#172033; --muted:#556072;
  --bg:#f5f7fb; --card:#ffffff; --line:#dfe5ee; --soft:#eef3fb; --ok:#0f7b3e; --warn-bg:#fff6e0; --warn:#7a4b00;
  --err:#b42318; --on-brand:#ffffff; --radius:14px; --shadow:0 1px 2px rgba(16,24,40,.06),0 4px 16px rgba(16,24,40,.06);
}
@media (prefers-color-scheme: dark){
  :root{ --brand:#8fb4ff; --brand-2:#a9c4ff; --accent:#ffc83d; --ink:#e7ecf5; --muted:#a3adbf;
    --bg:#0f1420; --card:#161d2c; --line:#27314a; --soft:#1b2436; --ok:#5fd08e; --warn-bg:#2b2412; --warn:#ffd48a;
    --err:#ff8a80; --on-brand:#0f1420; --shadow:0 1px 2px rgba(0,0,0,.4) }
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans",Arial,sans-serif}
a{color:var(--brand-2);text-underline-offset:2px}
a:hover{color:var(--brand)}
img{max-width:100%;height:auto}
.wrap{max-width:1080px;margin:0 auto;padding:0 16px}
.skip{position:absolute;left:-999px;top:0;background:var(--card);padding:8px 12px;z-index:10}
.skip:focus{left:8px}

/* header */
.site-header{background:var(--card);border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;gap:12px;min-height:60px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:8px;font-weight:800;font-size:1.1rem;color:var(--ink);text-decoration:none;margin-right:auto}
.bolt{display:inline-grid;place-items:center;width:32px;height:32px;border-radius:9px;background:#0b3d91;color:#f5b301;font-size:18px}
.menu-btn{display:none;border:1px solid var(--line);background:var(--card);color:var(--ink);border-radius:10px;padding:6px 12px;font:inherit;font-size:.95rem;cursor:pointer}
.site-nav ul{display:flex;flex-wrap:wrap;gap:4px;list-style:none;margin:0;padding:0}
.site-nav a{display:block;padding:8px 10px;border-radius:9px;color:var(--ink);text-decoration:none;font-size:.95rem}
.site-nav a:hover,.site-nav a[aria-current=page]{background:var(--soft);color:var(--brand)}
.unofficial{margin:0 auto;padding:6px 16px 8px;font-size:.82rem;color:var(--muted)}
@media (max-width:820px){
  .menu-btn{display:block}
  .site-nav{display:none;width:100%}
  .site-nav.open{display:block}
  .site-nav ul{flex-direction:column;padding-bottom:10px}
}
.no-js .site-nav{display:block}

/* page */
main{padding:18px 16px 40px}
.page{max-width:780px;margin:0 auto}
.crumbs{max-width:780px;margin:0 auto 6px;font-size:.88rem;color:var(--muted)}
.crumbs a{color:var(--muted)}
h1{font-size:clamp(1.7rem,4.6vw,2.35rem);line-height:1.2;margin:.2em 0 .1em;letter-spacing:-.01em}
h2{font-size:1.4rem;line-height:1.3;margin:1.8em 0 .5em}
h3{font-size:1.12rem;margin:1.4em 0 .4em}
.updated{color:var(--muted);font-size:.86rem;margin:0 0 1em}
.lead{font-size:1.08rem}
p,ul,ol{margin:.6em 0 1em}
li{margin:.25em 0}
code,kbd{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:.92em;background:var(--soft);padding:.05em .35em;border-radius:6px}

/* cards, notes */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px;margin:18px 0}
.note{background:var(--soft);border-left:4px solid var(--brand-2);border-radius:10px;padding:12px 14px;margin:16px 0}
.warn{background:var(--warn-bg);color:var(--warn);border-left:4px solid var(--accent);border-radius:10px;padding:12px 14px;margin:16px 0}
.warn a{color:inherit}
.src{font-size:.85rem;color:var(--muted)}
.grid2{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px;margin:14px 0}
.tile{display:block;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px 16px;text-decoration:none;color:var(--ink)}
.tile strong{display:block;color:var(--brand);margin-bottom:2px}
.tile span{font-size:.92rem;color:var(--muted)}
.tile:hover{border-color:var(--brand-2)}

/* forms */
.checker h2,.calc h2{margin-top:0;font-size:1.25rem}
.seg{display:inline-flex;border:1px solid var(--line);border-radius:12px;padding:3px;background:var(--soft);margin:0 0 12px;flex-wrap:wrap}
.seg label{display:flex;align-items:center;gap:6px;padding:7px 12px;border-radius:9px;cursor:pointer;font-size:.95rem}
.seg input{accent-color:var(--brand)}
.seg label:has(input:checked){background:var(--card);box-shadow:var(--shadow);font-weight:600}
.field{display:flex;flex-direction:column;gap:5px;margin:0 0 12px}
.field>label,.lbl{font-weight:600;font-size:.95rem}
.hint{font-size:.85rem;color:var(--muted)}
input[type=text],input[type=number],select{font:inherit;color:var(--ink);background:var(--card);border:1.5px solid var(--line);border-radius:11px;padding:11px 13px;width:100%}
input[type=text]:focus,input[type=number]:focus,select:focus{outline:none;border-color:var(--brand-2);box-shadow:0 0 0 3px rgba(21,96,212,.2)}
.big{font-size:1.25rem;letter-spacing:.06em;font-variant-numeric:tabular-nums}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:flex-start}
.row>.field{flex:1 1 200px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font:inherit;font-weight:700;border:0;border-radius:11px;padding:12px 20px;background:var(--brand);color:var(--on-brand);cursor:pointer;text-decoration:none}
.btn:hover{background:var(--brand-2);color:var(--on-brand)}
.btn.ghost{background:transparent;color:var(--brand);border:1.5px solid var(--line)}
.err{color:var(--err);font-size:.92rem;min-height:1.2em;margin:6px 0 0}
.ok{color:var(--ok)}
.check{display:flex;gap:8px;align-items:flex-start;font-size:.95rem;margin:6px 0}
.check input{margin-top:.35em;accent-color:var(--brand)}
.hidden{display:none!important}

/* result box */
.result{margin-top:16px;border-top:1px dashed var(--line);padding-top:14px}
.total{font-size:1.9rem;font-weight:800;color:var(--brand);font-variant-numeric:tabular-nums;margin:0}

/* tables */
.table-wrap{overflow-x:auto;margin:12px 0 18px;border:1px solid var(--line);border-radius:12px;background:var(--card)}
table{border-collapse:collapse;width:100%;font-size:.95rem}
th,td{padding:9px 12px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
th{background:var(--soft);font-weight:700}
tr:last-child td{border-bottom:0}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}
tfoot td{font-weight:800}
caption{caption-side:bottom;text-align:left;font-size:.82rem;color:var(--muted);padding:8px 12px}

/* faq */
.faq{margin-top:2.2em}
.faq details{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:0 16px;margin:10px 0}
.faq summary{cursor:pointer;font-weight:700;padding:13px 0;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;color:var(--muted);font-weight:400}
.faq details[open] summary::after{content:"-"}
.faq details>div{padding:0 0 12px}

/* steps */
ol.steps{counter-reset:s;list-style:none;padding:0}
ol.steps>li{counter-increment:s;position:relative;padding:2px 0 8px 44px;margin:10px 0}
ol.steps>li::before{content:counter(s);position:absolute;left:0;top:0;width:30px;height:30px;border-radius:50%;background:var(--brand);color:var(--on-brand);display:grid;place-items:center;font-weight:800;font-size:.9rem}

/* footer */
.site-footer{background:var(--card);border-top:1px solid var(--line);margin-top:30px;padding:26px 0 10px}
.fgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.fcol h2{font-size:1rem;margin:0 0 8px}
.fcol ul{list-style:none;margin:0;padding:0}
.fcol a{color:var(--muted);text-decoration:none;font-size:.93rem}
.fcol a:hover{color:var(--brand)}
.legal{font-size:.82rem;color:var(--muted);border-top:1px solid var(--line);margin-top:18px;padding-top:12px}
@media (max-width:700px){.fgrid{grid-template-columns:1fr 1fr}}
@media (max-width:460px){.fgrid{grid-template-columns:1fr}.card{padding:16px}body{font-size:16.5px}th,td{padding:8px 9px}table{font-size:.88rem}.seg{display:grid;grid-template-columns:1fr 1fr;width:100%}.seg label{justify-content:center;padding:8px 6px;font-size:.9rem}}
@media print{.site-header,.site-footer,.checker,.calc form{display:none}body{background:#fff}}

/* article template: contents box, featured image, related guides */
.toc{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:12px 16px 8px;margin:16px 0 20px}
.toc-title{font-weight:700;margin:0 0 6px;font-size:.95rem}
.toc ol{margin:0 0 4px;padding-left:20px;columns:2;column-gap:28px;font-size:.93rem}
.toc li{break-inside:avoid;margin:.15em 0}
@media (max-width:640px){.toc ol{columns:1}}
.hero{margin:10px 0 18px}
.hero img{display:block;width:100%;height:auto;border-radius:14px;border:1px solid var(--line);background:var(--soft)}
figure.inline{margin:18px 0}
figure.inline img{display:block;width:100%;height:auto;border-radius:12px;border:1px solid var(--line)}
figure.inline figcaption{font-size:.85rem;color:var(--muted);margin-top:6px}
.related{margin-top:2.2em}
.unit-links{display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0;margin:12px 0 20px}
.unit-links li{margin:0}
.unit-links a{display:inline-block;padding:6px 12px;border:1px solid var(--line);border-radius:999px;background:var(--card);text-decoration:none;font-size:.95rem}