/* Panel Headroom — first-edition site styles. Static, no framework. */
:root {
  --paper: #f3efe6;
  --paper-2: #e8e1d4;
  --card: #fffdf8;
  --ink: #1c1915;
  --ink-soft: #534d44;
  --ink-faint: #7a7368;
  --line: #d4cbb8;
  --line-strong: #b9ae98;
  --accent: #9b3d16;
  --accent-hover: #7c2f10;
  --accent-soft: #f3e4db;
  --spruce: #1f4a3d;
  --spruce-soft: #e3eee8;
  --warn: #8a5a10;
  --warn-soft: #f6ead0;
  --bad: #8a2a1a;
  --bad-soft: #f3e1db;
  --focus: #1f4a3d;
  --max: 72rem;
  --measure: 44rem;
  --radius: 0.55rem;
  --shadow: 0 1px 2px rgba(28, 25, 21, 0.06), 0 8px 24px rgba(28, 25, 21, 0.05);
  --font-serif: "Newsreader", "Iowan Old Style", Palatino, "Palatino Linotype", "Times New Roman", serif;
  --font-sans: "IBM Plex Sans", "Source Sans 3", "Segoe UI", "Helvetica Neue", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--accent); text-underline-offset: 0.15em; }
a:hover { color: var(--accent-hover); }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: 0.75rem;
  top: -3rem;
  background: var(--ink);
  color: var(--card);
  padding: 0.4rem 0.7rem;
  z-index: 100;
}
.skip-link:focus { top: 0.75rem; }

/* Header */
.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--paper);
  position: sticky;
  top: 0;
  z-index: 40;
}
.header-inner, .footer-inner, .wrap {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.7rem 0;
}
.wordmark {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: inherit;
  min-width: 0;
}
.wordmark-mark { width: 2rem; height: 2rem; flex: none; }
.wordmark-text { display: flex; flex-direction: column; line-height: 1.15; }
.wordmark-name {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}
.wordmark-tag {
  font-size: 0.72rem;
  color: var(--ink-faint);
  letter-spacing: 0.02em;
}
.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: 0.4rem;
  padding: 0.4rem 0.65rem;
  font: inherit;
  font-size: 0.9rem;
  color: var(--ink);
}
.site-nav ul {
  display: flex;
  gap: 0.15rem 1.1rem;
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
  justify-content: flex-end;
}
.site-nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
}
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--ink); }
.site-nav a[aria-current="page"] { box-shadow: inset 0 -2px 0 var(--accent); }

@media (max-width: 860px) {
  .nav-toggle { display: inline-flex; align-items: center; }
  .site-nav {
    display: none;
    position: absolute;
    left: 0; right: 0;
    top: 100%;
    background: var(--card);
    border-bottom: 1px solid var(--line);
    padding: 0.5rem 1rem 1rem;
  }
  .site-nav.is-open { display: block; }
  .site-nav ul { flex-direction: column; gap: 0; }
  .site-nav a { display: block; padding: 0.7rem 0.2rem; }
}

/* Hero / typography */
.hero, .page-hero {
  padding: 2.6rem 0 2rem;
  border-bottom: 1px solid var(--line);
}
.eyebrow {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.6rem;
}
h1, h2, h3, .serif { font-family: var(--font-serif); letter-spacing: -0.02em; }
h1 {
  font-size: clamp(2rem, 4.2vw, 3.15rem);
  line-height: 1.12;
  font-weight: 600;
  margin: 0 0 0.8rem;
  max-width: 20ch;
}
.lede, .hero p.lede {
  font-size: 1.2rem;
  line-height: 1.5;
  color: var(--ink-soft);
  max-width: 42rem;
  margin: 0 0 1.4rem;
}
.page-hero h1 { max-width: 24ch; }
.page-hero .lede { font-size: 1.1rem; }
h2 { font-size: 1.65rem; line-height: 1.2; margin: 2.2rem 0 0.7rem; }
h3 { font-size: 1.22rem; line-height: 1.25; margin: 1.5rem 0 0.5rem; }
p { margin: 0 0 1rem; }
.prose { max-width: var(--measure); }
.prose > p:last-child { margin-bottom: 0; }
.meta {
  color: var(--ink-faint);
  font-size: 0.88rem;
  margin: 0 0 1rem;
}

main { padding-bottom: 3.5rem; }
section.band { padding: 2.2rem 0; }
section.band + section.band { border-top: 1px solid var(--line); }

/* Cards / tools */
.card-grid, .tool-grid, .guide-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(16.5rem, 1fr));
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.15rem 1.2rem 1.25rem;
  box-shadow: var(--shadow);
}
.card h2, .card h3 { margin-top: 0; }
.card.tool { display: flex; flex-direction: column; min-height: 100%; }
.card .kicker {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--spruce);
  margin: 0 0 0.35rem;
}
.card p { color: var(--ink-soft); flex: 1; }
.btn, button.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  background: var(--accent);
  color: #fffdf8;
  text-decoration: none;
  border: 0;
  border-radius: 999px;
  padding: 0.55rem 1rem;
  font: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
}
.btn:hover { background: var(--accent-hover); color: #fffdf8; }
.btn-secondary, a.btn-secondary {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line-strong);
}
.btn-secondary:hover { background: var(--paper-2); color: var(--ink); }
.btn-row { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-top: 0.4rem; }

/* Tables */
.table-wrap { overflow-x: auto; margin: 0 0 1.2rem; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  background: var(--card);
}
th, td {
  text-align: left;
  padding: 0.55rem 0.7rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
th {
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--ink-soft);
  background: var(--paper-2);
}
tbody tr:last-child td { border-bottom: 0; }
.num, td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
caption {
  text-align: left;
  font-size: 0.85rem;
  color: var(--ink-soft);
  margin: 0 0 0.4rem;
  caption-side: bottom;
  padding-top: 0.4rem;
}

/* Callouts */
.callout, .disclaimer-box, .source-box, .result {
  border-radius: var(--radius);
  padding: 0.9rem 1rem;
  margin: 1rem 0;
}
.callout, .source-box {
  background: var(--paper-2);
  border: 1px solid var(--line);
}
.disclaimer-box, .callout.caution {
  background: var(--warn-soft);
  border: 1px solid #e0c98a;
}
.callout.danger {
  background: var(--bad-soft);
  border: 1px solid #e0b3aa;
}
.callout.ok {
  background: var(--spruce-soft);
  border: 1px solid #b7cfc4;
}
.callout h2, .callout h3, .disclaimer-box h2, .disclaimer-box h3 { margin-top: 0; }
.formula {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 0.4rem;
  padding: 0.75rem 0.9rem;
  overflow-x: auto;
  line-height: 1.45;
}
.footnote, .sources-list { font-size: 0.88rem; color: var(--ink-soft); }
.sources-list { padding-left: 1.1rem; }

/* Calculator layout */
.calc-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(18rem, 0.85fr);
  gap: 1.25rem;
  align-items: start;
  margin-top: 1.25rem;
}
@media (max-width: 860px) {
  .calc-layout { grid-template-columns: 1fr; }
  .results-panel { position: static; }
}
.results-panel { position: sticky; top: 5rem; }
fieldset {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
  margin: 0 0 1rem;
  padding: 0.9rem 1rem 1rem;
}
legend {
  font-weight: 600;
  padding: 0 0.35rem;
  font-family: var(--font-serif);
}
.field { margin: 0 0 0.75rem; }
.field label, .check label {
  display: block;
  font-size: 0.88rem;
  font-weight: 500;
  margin-bottom: 0.25rem;
}
.hint { display: block; color: var(--ink-faint); font-size: 0.8rem; font-weight: 400; margin-top: 0.2rem; }
input[type="text"], input[type="number"], input[type="email"], select, textarea {
  width: 100%;
  font: inherit;
  font-size: 1rem;
  padding: 0.45rem 0.55rem;
  border: 1px solid var(--line-strong);
  border-radius: 0.4rem;
  background: #fff;
  color: var(--ink);
}
.field-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
  gap: 0.7rem;
}
.check { display: flex; gap: 0.5rem; align-items: flex-start; margin: 0.35rem 0; }
.check input { margin-top: 0.3rem; }
.check label { margin: 0; font-weight: 400; }
.seg {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}
.seg label {
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 0.3rem 0.7rem;
  font-size: 0.88rem;
  cursor: pointer;
  background: var(--card);
}
.seg input { position: absolute; opacity: 0; pointer-events: none; }
.seg label:has(input:checked) {
  background: var(--ink);
  color: var(--card);
  border-color: var(--ink);
}

.result-hero {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.1rem 1.15rem;
  box-shadow: var(--shadow);
}
.result-hero .status {
  font-family: var(--font-serif);
  font-size: 1.45rem;
  line-height: 1.2;
  margin: 0 0 0.4rem;
}
.result-hero.ok { border-color: #8fb3a4; background: linear-gradient(#f6fbf8, var(--card)); }
.result-hero.tight { border-color: #e0c98a; background: linear-gradient(#fbf6e9, var(--card)); }
.result-hero.over { border-color: #e0b3aa; background: linear-gradient(#fbf4f2, var(--card)); }
.stat-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem;
  margin: 0.8rem 0;
}
.stat {
  background: var(--paper);
  border-radius: 0.4rem;
  padding: 0.55rem 0.65rem;
}
.stat .label { display: block; font-size: 0.75rem; color: var(--ink-faint); text-transform: uppercase; letter-spacing: 0.04em; }
.stat .value { font-variant-numeric: tabular-nums; font-weight: 600; font-size: 1.15rem; }

/* Appliance list */
.item-list { display: flex; flex-direction: column; gap: 0.35rem; }
.item-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.5rem 0.7rem;
  align-items: center;
  padding: 0.35rem 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.95rem;
}
.watts { font-variant-numeric: tabular-nums; color: var(--ink-soft); font-size: 0.85rem; text-align: right; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  background: #efe8db;
  padding: 2rem 0 2.4rem;
  font-size: 0.9rem;
  color: var(--ink-soft);
}
.footer-inner { display: grid; gap: 1.2rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: 0.4rem 1rem; padding: 0; margin: 0; list-style: none; }
.footer-links a { color: var(--ink-soft); text-decoration: none; }
.footer-links a:hover { color: var(--ink); }
.legal-note { max-width: 50rem; margin: 0; }

/* Utilities */
.muted { color: var(--ink-soft); }
.small { font-size: 0.88rem; }
.center-meta { margin-top: 2rem; }
hr.soft { border: 0; border-top: 1px solid var(--line); margin: 2rem 0; }
.toc { padding-left: 1.15rem; }
.toc a { text-decoration: none; }
.related { margin-top: 2.5rem; }
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}

/* Q&A / GEO pages */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 0.4rem;
  list-style: none;
  margin: 0 0 1rem;
  padding: 0;
  font-size: 0.85rem;
  color: var(--ink-faint);
}
.breadcrumb li:not(:last-child)::after { content: "/"; margin-left: 0.4rem; color: var(--line-strong); }
.breadcrumb a { color: var(--ink-soft); text-decoration: none; }
.breadcrumb a:hover { color: var(--ink); }
.direct-answer {
  background: var(--card);
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1rem 1.15rem;
  margin: 0 0 1.4rem;
  box-shadow: var(--shadow);
}
.direct-answer p:last-child { margin-bottom: 0; }
.qa-layout { display: grid; grid-template-columns: minmax(0, var(--measure)) minmax(14rem, 1fr); gap: 2rem; align-items: start; }
@media (max-width: 860px) { .qa-layout { grid-template-columns: 1fr; } }
.qa-side { position: sticky; top: 5rem; }
.qa-side h2 { font-size: 1.05rem; margin-top: 0; }
.qa-side ul { margin: 0; padding-left: 1.1rem; }
.qa-side li { margin: 0.35rem 0; }
.question-index { display: grid; gap: 0.35rem; }
.question-index a {
  display: block;
  text-decoration: none;
  color: var(--ink);
  padding: 0.55rem 0.7rem;
  border-bottom: 1px solid var(--line);
  background: var(--card);
}
.question-index a:hover { background: var(--paper-2); }
.cluster-label {
  display: inline-block;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--spruce);
  font-weight: 600;
}
.hero-tools { margin-top: 0.5rem; }