/* Layout: full-width black header bar with centred menu, split hero (headline + electricity-meter graphic), bento grid, claim-vs-check table, two calculators side by side, FAQ accordion in a narrow column, footer. Black and electric green, angular tech type. Single dark theme by design. */
:root {
  color-scheme: dark;
  --bg: #060908;
  --surface: #0e1511;
  --surface2: #142019;
  --fg: #e9f5ee;
  --muted: #94ab9d;
  --line: #1f3327;
  --green: #2dff7a;
  --green-dim: #14a14b;
  --green-ink: #03130a;
  --warn: #ffb347;
  --bad: #ff6b6b;
  --display: "Chakra Petch", "Arial Narrow", system-ui, sans-serif;
  --body: "Manrope", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "Share Tech Mono", ui-monospace, Menlo, Consolas, monospace;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 5rem; }
body { margin: 0; background: var(--bg); color: var(--fg); font-family: var(--body); font-size: 1.0625rem; line-height: 1.65; padding-inline: 1rem; }
a { color: inherit; }
:focus-visible { outline: 3px solid var(--green); outline-offset: 3px; }
.wrap { max-width: 70rem; margin-inline: auto; }
h1, h2, h3 { font-family: var(--display); line-height: 1.05; margin: 0; text-wrap: balance; font-weight: 700; letter-spacing: 0.005em; }
h1 { font-size: clamp(2.6rem, 7.5vw, 5rem); text-transform: uppercase; }
h2 { font-size: clamp(1.9rem, 4.6vw, 3rem); text-transform: uppercase; }
h3 { font-size: 1.3rem; }
p { margin: 0; }
.label { font-family: var(--mono); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.16em; color: var(--green); }
.g { color: var(--green); }

/* header + footer menus */
.bar { background: var(--bg); border-bottom: 1px solid var(--line); margin-inline: -1rem; padding-inline: 1rem; position: sticky; top: 0; z-index: 10; }
.bar .wrap { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 0.4rem 1rem; padding-block: 0.8rem; }
.brand { font-family: var(--display); font-weight: 700; font-size: 1.45rem; text-decoration: none; text-transform: uppercase; letter-spacing: 0.04em; display: inline-flex; align-items: center; gap: 0.5rem; }
.brand i { width: 0.7rem; height: 0.7rem; background: var(--green); display: inline-block; clip-path: polygon(40% 0, 100% 0, 60% 45%, 100% 45%, 30% 100%, 45% 55%, 0 55%); width: 1rem; height: 1.3rem; }
nav ul { list-style: none; display: flex; flex-wrap: wrap; gap: 0.2rem 1.6rem; margin: 0; padding: 0; justify-content: center; }
nav a { text-decoration: none; font-family: var(--mono); text-transform: uppercase; letter-spacing: 0.1em; font-size: 0.92rem; padding-block: 0.35rem; border-bottom: 2px solid transparent; }
nav a:hover { color: var(--green); border-color: var(--green); }
.bar .tail { justify-self: end; font-family: var(--mono); font-size: 0.78rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.1em; }

section { padding-block: clamp(3rem, 8vw, 6rem); }
.intro { max-width: 44rem; display: grid; gap: 1rem; }
.intro .sub { color: var(--muted); }
.box { background: var(--surface); border: 1px solid var(--line); }
.pad { padding: clamp(1.1rem, 3vw, 1.7rem); }

.btn { display: inline-block; text-decoration: none; font-family: var(--display); font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; padding: 0.85rem 1.5rem; background: var(--green); color: var(--green-ink); border: 2px solid var(--green); cursor: pointer; font-size: 1rem; clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px)); }
.btn.ghost { background: transparent; color: var(--green); }
.btn:hover { background: var(--fg); border-color: var(--fg); color: var(--green-ink); }

/* hero: split */
.hero { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 3rem; align-items: center; padding-block: clamp(2.5rem, 7vw, 5rem); }
.hero > * { min-width: 0; }
.hero h1 { margin: 1rem 0 1.25rem; }
.hero .lead { font-size: 1.15rem; color: var(--muted); max-width: 34rem; }
.cta { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 2rem; }
.meter { padding: 1.25rem; border: 1px solid var(--line); background: linear-gradient(160deg, var(--surface2), var(--bg)); }
.meter svg { display: block; width: 100%; height: auto; }

/* bento */
.bento { display: grid; grid-template-columns: repeat(6, 1fr); gap: 1rem; margin-top: 2.5rem; }
.bento > * { min-width: 0; padding: 1.5rem; display: grid; gap: 0.5rem; align-content: start; }
.bento .tag { font-family: var(--mono); font-size: 0.78rem; color: var(--green); text-transform: uppercase; letter-spacing: 0.12em; }
.bento p { color: var(--muted); }
.s2 { grid-column: span 2; } .s3 { grid-column: span 3; } .s4 { grid-column: span 4; }
.bento .hot { background: var(--green); border-color: var(--green); }
.bento .hot .tag, .bento .hot p, .bento .hot h3 { color: var(--green-ink); }

/* claim vs check */
.tbl { margin-top: 2.5rem; overflow-x: auto; }
table { border-collapse: collapse; width: 100%; min-width: 38rem; }
th, td { text-align: left; padding: 1rem 1.2rem; border-bottom: 1px solid var(--line); vertical-align: top; }
thead th { font-family: var(--mono); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--green); font-weight: 400; }
tbody th { font-family: var(--display); font-size: 1.05rem; width: 24%; }
td { color: var(--muted); }
tr:last-child th, tr:last-child td { border-bottom: 0; }
.checks { margin-top: 2rem; display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.checks > * { min-width: 0; }
.checks h3 { margin-bottom: 0.7rem; }
.checks ul { margin: 0; padding-left: 1.2rem; color: var(--muted); }
.checks li { margin-bottom: 0.45rem; }
.note { margin-top: 1rem; font-size: 0.92rem; color: var(--muted); max-width: 46rem; }

/* calculators */
.tools { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; margin-top: 2.5rem; align-items: start; }
.tools > * { min-width: 0; }
.tools h3 { margin-bottom: 0.4rem; }
.tools .hint { color: var(--muted); font-size: 0.95rem; margin-bottom: 1.2rem; }
.field { display: grid; gap: 0.35rem; margin-bottom: 1rem; }
.field label { font-weight: 600; font-size: 0.93rem; }
input { font: inherit; color: var(--fg); background: var(--bg); border: 1px solid var(--line); padding: 0.6rem 0.75rem; width: 100%; border-radius: 0; }
input:focus { border-color: var(--green); }
input[type="range"] { padding: 0; accent-color: var(--green); }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }
.readout { font-family: var(--mono); font-size: 0.9rem; color: var(--green); }
.nums { display: grid; grid-template-columns: 1fr 1fr; gap: 0.6rem; margin: 0.5rem 0 1rem; }
.num { border: 1px solid var(--line); padding: 0.7rem 0.9rem; min-width: 0; }
.num dt { font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--muted); }
.num dd { margin: 0.2rem 0 0; font-family: var(--display); font-size: clamp(1.2rem, 2.4vw, 1.55rem); font-weight: 700; overflow-wrap: anywhere; }
.num.hl dd { color: var(--green); }
.verdict { padding: 0.9rem 1rem; border: 1px solid var(--line); border-left: 4px solid var(--muted); background: var(--bg); }
.verdict strong { display: block; font-family: var(--display); font-size: 1.15rem; text-transform: uppercase; letter-spacing: 0.03em; }
.verdict p { color: var(--muted); font-size: 0.96rem; margin-top: 0.3rem; }
.verdict.good { border-left-color: var(--green); } .verdict.good strong { color: var(--green); }
.verdict.warn { border-left-color: var(--warn); } .verdict.warn strong { color: var(--warn); }

/* faq */
.faqwrap { max-width: 50rem; margin-inline: auto; display: grid; gap: 2rem; }
.faq { display: grid; gap: 0.6rem; }
summary { cursor: pointer; font-weight: 700; padding: 1rem 1.25rem; list-style: none; display: flex; justify-content: space-between; gap: 1rem; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; font-family: var(--mono); color: var(--green); font-size: 1.2rem; }
details[open] summary::after { content: "\2212"; }
details p { padding: 0 1.25rem 1.1rem; color: var(--muted); }

footer { border-top: 1px solid var(--line); margin-inline: -1rem; padding-inline: 1rem; padding-block: 2.2rem; }
footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1.25rem 2rem; align-items: start; }
footer small { display: block; color: var(--muted); margin-top: 0.6rem; max-width: 30rem; line-height: 1.55; }

@media (max-width: 54rem) {
  .hero, .tools, .checks { grid-template-columns: 1fr; }
  .bento { grid-template-columns: 1fr 1fr; }
  .s2, .s3, .s4 { grid-column: span 2; }
  .bar .wrap { grid-template-columns: 1fr; justify-items: center; }
  .bar .tail { display: none; }
}
@media (max-width: 34rem) {
  .bento { grid-template-columns: 1fr; }
  .s2, .s3, .s4 { grid-column: auto; }
  .row2, .nums { grid-template-columns: 1fr; }
  nav ul { gap: 0.1rem 1rem; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }