/* Generator Sizing Calculator — clean, trustworthy, mobile-first.
   System font stack, no webfonts (fast). High contrast, generous spacing. */

:root {
  --bg: #ffffff;
  --bg-soft: #f6f8f7;
  --ink: #1c2420;
  --ink-soft: #4b5651;
  --line: #dfe5e2;
  --accent: #0f6b4f;
  --accent-dark: #0a4f3a;
  --warn: #9a5b00;
  --warn-bg: #fdf3e3;
  --danger: #a4262c;
  --danger-bg: #fdeeee;
  --radius: 10px;
  --maxw: 1060px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  font-size: 17px;
}

a { color: var(--accent); }
a:hover { color: var(--accent-dark); }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 1.1rem; }

/* ---------- Header / nav ---------- */
.site-header { border-bottom: 1px solid var(--line); background: var(--bg); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; padding-top: .8rem; padding-bottom: .8rem; }
.brand { font-weight: 700; font-size: 1.15rem; color: var(--ink); text-decoration: none; }
.brand span { color: var(--accent); }
.site-nav a { margin-left: 1.1rem; font-size: .95rem; color: var(--ink-soft); text-decoration: none; }
.site-nav a:hover { color: var(--accent); }

/* ---------- Hero ---------- */
.hero { background: var(--bg-soft); border-bottom: 1px solid var(--line); padding: 2.2rem 0 1.8rem; }
.hero h1 { font-size: 1.9rem; line-height: 1.25; margin: 0 0 .6rem; max-width: 22ch; }
.hero p.lede { font-size: 1.08rem; color: var(--ink-soft); margin: 0; max-width: 60ch; }

/* ---------- Calculator ---------- */
.tool { padding: 1.6rem 0 2.4rem; }
.tool-grid { display: grid; gap: 1.4rem; }
@media (min-width: 900px) {
  .tool-grid { grid-template-columns: 1fr 380px; align-items: start; }
}

.card { background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.2rem; }
.results-card { position: sticky; top: 1rem; background: var(--bg-soft); }

.category { margin-bottom: 1.4rem; }
.category > h2 { font-size: 1.05rem; margin: 0 0 .6rem; padding-bottom: .35rem; border-bottom: 2px solid var(--line); }

.appliance { display: grid; grid-template-columns: auto 1fr auto; gap: .6rem; align-items: center; padding: .55rem .4rem; border-radius: 8px; }
.appliance:nth-child(odd) { background: #fafcfb; }
.appliance input[type="checkbox"] { width: 1.25rem; height: 1.25rem; accent-color: var(--accent); }
.appliance .nm { font-weight: 600; font-size: .98rem; }
.appliance .watts { font-size: .85rem; color: var(--ink-soft); }
.appliance .ctl { display: flex; gap: .35rem; align-items: center; }
.appliance .ctl input[type="number"] { width: 3.4rem; padding: .3rem .35rem; border: 1px solid var(--line); border-radius: 6px; font-size: .85rem; }
.appliance .ctl select { padding: .3rem .35rem; border: 1px solid var(--line); border-radius: 6px; font-size: .85rem; background: #fff; }
.appliance .wedit { display: none; gap: .35rem; margin-top: .3rem; grid-column: 1 / -1; font-size: .85rem; color: var(--ink-soft); align-items: center; flex-wrap: wrap; }
.appliance.selected .wedit { display: flex; }
.appliance .wedit input { width: 4.2rem; padding: .28rem .35rem; border: 1px solid var(--line); border-radius: 6px; font-size: .85rem; }
.conf { display: inline-block; font-size: .72rem; font-weight: 600; padding: .1rem .45rem; border-radius: 999px; margin-left: .4rem; vertical-align: middle; }
.conf.guide { background: #e2f0e9; color: var(--accent-dark); }
.conf.estimate { background: #eef1f0; color: var(--ink-soft); }

.btn-row { display: flex; gap: .7rem; margin: 1.2rem 0; flex-wrap: wrap; }
.btn { appearance: none; border: 1px solid var(--accent); background: var(--accent); color: #fff; font-size: 1rem; font-weight: 600; padding: .7rem 1.4rem; border-radius: 8px; cursor: pointer; }
.btn:hover { background: var(--accent-dark); }
.btn.ghost { background: #fff; color: var(--accent); }
.btn.ghost:hover { background: var(--bg-soft); }

/* ---------- Results ---------- */
.result-empty { color: var(--ink-soft); font-size: .98rem; }
.result-size { font-size: 2.6rem; font-weight: 800; color: var(--accent-dark); line-height: 1.1; margin: .2rem 0 .4rem; }
.result-size small { font-size: 1.1rem; font-weight: 600; color: var(--ink-soft); }
.result-nums { width: 100%; border-collapse: collapse; font-size: .92rem; margin: .8rem 0; }
.result-nums th, .result-nums td { text-align: left; padding: .4rem .2rem; border-bottom: 1px solid var(--line); }
.result-nums th { color: var(--ink-soft); font-weight: 600; }
.breakdown { width: 100%; border-collapse: collapse; font-size: .88rem; margin-top: .6rem; }
.breakdown th, .breakdown td { text-align: left; padding: .35rem .25rem; border-bottom: 1px solid var(--line); }
.breakdown th { color: var(--ink-soft); font-size: .8rem; text-transform: uppercase; letter-spacing: .03em; }
.callout { border-left: 4px solid var(--accent); background: #eef6f2; padding: .7rem .9rem; border-radius: 0 8px 8px 0; font-size: .93rem; margin: .9rem 0; }
.callout.warn { border-color: var(--warn); background: var(--warn-bg); }
.callout.danger { border-color: var(--danger); background: var(--danger-bg); }
.can-list, .cant-list { margin: .3rem 0 .3rem 1.1rem; padding: 0; font-size: .93rem; }
.cant-list { color: var(--danger); }

/* ---------- Content sections ---------- */
.prose { max-width: 68ch; }
.prose h2 { margin-top: 2.2rem; font-size: 1.4rem; }
.prose h3 { margin-top: 1.6rem; font-size: 1.15rem; }
.guide-cards { display: grid; gap: 1rem; margin: 1.4rem 0; }
@media (min-width: 700px) { .guide-cards { grid-template-columns: repeat(3, 1fr); } }
.guide-card { border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem 1.1rem; text-decoration: none; color: var(--ink); display: block; }
.guide-card:hover { border-color: var(--accent); }
.guide-card h3 { margin: 0 0 .35rem; font-size: 1.05rem; color: var(--accent-dark); }
.guide-card p { margin: 0; font-size: .93rem; color: var(--ink-soft); }

/* ---------- FAQ ---------- */
.faq details { border: 1px solid var(--line); border-radius: 8px; margin-bottom: .6rem; padding: .7rem .95rem; background: #fff; }
.faq summary { font-weight: 600; cursor: pointer; }
.faq summary:hover { color: var(--accent-dark); }
.faq p { margin: .5rem 0 0; color: var(--ink-soft); font-size: .97rem; }

/* ---------- Affiliate placeholders ---------- */
.affil { border: 1px dashed var(--line); border-radius: var(--radius); padding: 1.1rem; margin: 1.6rem 0; background: #fbfdfc; }
.affil h2 { margin-top: 0; font-size: 1.2rem; }
.affil-grid { display: grid; gap: .9rem; }
@media (min-width: 700px) { .affil-grid { grid-template-columns: repeat(3, 1fr); } }
.affil-card { border: 1px solid var(--line); border-radius: 8px; padding: .9rem; background: #fff; }
.affil-card h3 { margin: 0 0 .3rem; font-size: 1rem; }
.affil-card p { font-size: .9rem; color: var(--ink-soft); margin: 0 0 .6rem; }
.disclosure { font-size: .82rem; color: var(--ink-soft); border-top: 1px solid var(--line); margin-top: 1rem; padding-top: .7rem; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--line); margin-top: 2.5rem; padding: 1.6rem 0 2.2rem; color: var(--ink-soft); font-size: .9rem; background: var(--bg-soft); }
.site-footer nav a { margin-right: 1rem; }

/* ---------- Ad slot placeholders (commented out in HTML; styles ready) ---------- */
.ad-slot { display: flex; align-items: center; justify-content: center; background: var(--bg-soft); border: 1px dashed var(--line); color: var(--ink-soft); font-size: .8rem; margin: 1.2rem auto; }
.ad-leaderboard { width: 728px; max-width: 100%; height: 90px; }
.ad-rectangle { width: 336px; max-width: 100%; height: 280px; }