/* Generator Sizer — mobile-first styles. No frameworks, no external assets. */

:root {
  --bg: #ffffff;
  --bg-alt: #f6f8fa;
  --ink: #1c2430;
  --ink-soft: #4a5568;
  --line: #e2e8f0;
  --accent: #d97706;      /* amber — energy */
  --accent-dark: #b45309;
  --accent-soft: #fef3c7;
  --brand: #0f2a43;       /* deep slate header */
  --ok: #15803d;
  --radius: 10px;
  --maxw: 1080px;
  --narrow: 760px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
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;
}

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

/* Header */
.site-header {
  background: var(--brand);
  color: #fff;
  position: sticky; top: 0; z-index: 50;
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: .7rem; padding-bottom: .7rem;
}
.brand { color: #fff; font-weight: 800; font-size: 1.15rem; text-decoration: none; letter-spacing: .2px; }
.site-header nav a {
  color: #cbd5e1; text-decoration: none; margin-left: 1.1rem; font-size: .95rem;
}
.site-header nav a:hover { color: #fff; }

/* Hero */
.hero {
  background: linear-gradient(180deg, var(--brand) 0%, #14344f 100%);
  color: #fff; text-align: center;
  padding: 3rem 0 2.6rem;
}
.hero h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 .8rem; letter-spacing: -.5px; }
.hero .subhead { color: #cbd5e1; max-width: 640px; margin: 0 auto 1.6rem; font-size: 1.08rem; }

/* Buttons */
.btn {
  display: inline-block; border: 0; border-radius: var(--radius);
  padding: .8rem 1.6rem; font-size: 1rem; font-weight: 700;
  text-decoration: none; cursor: pointer; text-align: center;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); }
.btn-secondary {
  background: #fff; color: var(--ink);
  border: 2px solid var(--line);
}
.btn-secondary:hover { border-color: var(--accent); color: var(--accent-dark); }
.card-links .btn { padding: .6rem 1rem; font-size: .9rem; }
.link-btn {
  background: none; border: 0; color: var(--accent-dark);
  text-decoration: underline; cursor: pointer; font-size: .95rem; padding: .4rem 0;
}

/* Sections */
section { padding: 2.6rem 0; }
.content-section.alt { background: var(--bg-alt); }
h2 { font-size: 1.6rem; margin: 0 0 1.2rem; letter-spacing: -.3px; }
h3 { font-size: 1.2rem; }

/* Calculator */
.calculator-section { background: var(--bg-alt); }
.step {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.3rem; margin-bottom: 1.2rem;
}
.step h3 { margin: 0 0 1rem; display: flex; align-items: center; gap: .6rem; }
.step-num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 1.7rem; height: 1.7rem; border-radius: 50%;
  background: var(--accent); color: #fff; font-size: .95rem; font-weight: 800; flex: none;
}
.step-hint { font-weight: 400; color: var(--ink-soft); font-size: .9rem; }

.presets { display: grid; grid-template-columns: 1fr; gap: .6rem; }
.preset-btn {
  border: 2px solid var(--line); background: #fff; border-radius: var(--radius);
  padding: .9rem; font-size: 1rem; font-weight: 700; cursor: pointer; color: var(--ink);
}
.preset-btn:hover, .preset-btn.active { border-color: var(--accent); background: var(--accent-soft); }
.preset-note { color: var(--ink-soft); font-size: .92rem; margin: .8rem 0 0; }

.appliance-group { border: 0; padding: 0; margin: 0 0 1.2rem; }
.appliance-group legend {
  font-weight: 800; font-size: 1.02rem; padding: 0; margin-bottom: .5rem;
  border-bottom: 2px solid var(--accent-soft); width: 100%; padding-bottom: .3rem;
}
.appliance-row {
  display: flex; align-items: center; gap: .7rem;
  padding: .55rem .2rem; border-bottom: 1px solid var(--line); cursor: pointer;
}
.appliance-row:last-child { border-bottom: 0; }
.appliance-row input[type="checkbox"] { width: 1.25rem; height: 1.25rem; accent-color: var(--accent); flex: none; }
.appliance-name { flex: 1; }
.appliance-watts { color: var(--ink-soft); font-size: .9rem; white-space: nowrap; }
.appliance-row .remove-btn {
  background: none; border: 0; color: #b91c1c; cursor: pointer; font-size: 1.1rem; padding: 0 .2rem;
}

.custom-form { margin-top: 1.2rem; border-top: 1px solid var(--line); padding-top: 1rem; }
.custom-form h4 { margin: 0 0 .6rem; font-size: 1rem; }
.custom-row { display: flex; gap: .5rem; flex-wrap: wrap; }
.custom-row input[type="text"] { flex: 2 1 160px; }
.custom-row input[type="number"] { flex: 1 1 90px; }
.custom-row input {
  border: 2px solid var(--line); border-radius: 8px; padding: .65rem .8rem; font-size: 1rem;
}
.custom-row input:focus { outline: none; border-color: var(--accent); }
.fine-print { color: var(--ink-soft); font-size: .85rem; margin: .5rem 0 0; }

/* Results */
.results {
  background: #fff; border: 2px solid var(--line); border-radius: var(--radius);
  padding: 1.3rem;
}
.results-empty { color: var(--ink-soft); margin: 0; }
.result-grid { display: grid; grid-template-columns: 1fr 1fr; gap: .8rem; margin-bottom: 1rem; }
.result-stat {
  background: var(--bg-alt); border-radius: 8px; padding: .8rem; text-align: center;
}
.result-stat .num { display: block; font-size: 1.5rem; font-weight: 800; }
.result-stat .lbl { font-size: .82rem; color: var(--ink-soft); }
.result-class {
  background: var(--accent-soft); border: 2px solid var(--accent);
  border-radius: var(--radius); padding: 1rem 1.2rem; margin-bottom: 1rem;
}
.result-class .rec-size { font-size: 1.7rem; font-weight: 800; margin: 0; }
.result-class .rec-label { margin: .2rem 0 0; font-weight: 600; }
.result-math {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: .88rem; background: var(--bg-alt); border-radius: 8px;
  padding: .8rem 1rem; overflow-x: auto; white-space: nowrap; margin: 0 0 1rem;
}
.result-notes { margin: 0; padding-left: 1.2rem; color: var(--ink-soft); font-size: .95rem; }
.result-notes li { margin-bottom: .35rem; }

/* Ad slots */
.ad-slot {
  border: 2px dashed var(--line); border-radius: var(--radius);
  min-height: 110px; display: flex; align-items: center; justify-content: center;
  margin: 1.6rem 0; background: #fafbfc;
}
.ad-label { color: #94a3b8; font-size: .8rem; text-transform: uppercase; letter-spacing: 1.5px; }

/* Recommendations */
.recommendations-section { background: #fff; }
.disclosure-line {
  background: #fffbeb; border: 1px solid #fde68a; border-radius: 8px;
  padding: .8rem 1rem; font-size: .9rem; margin: 0 0 1.4rem;
}
.cards { display: grid; grid-template-columns: 1fr; gap: 1rem; }
.card {
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.3rem; background: #fff;
}
.card h3 { margin: 0 0 .3rem; }
.card-best { color: var(--accent-dark); font-weight: 600; font-size: .95rem; margin: 0 0 .6rem; }
.card p { margin: 0 0 .8rem; }
.card-links { display: flex; gap: .6rem; flex-wrap: wrap; }
.card-standby { background: var(--bg-alt); }

/* Content */
.content-section p { max-width: 68ch; }
.example {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.2rem 1.3rem; margin-bottom: 1.1rem;
}
.example h3 { margin: 0 0 .5rem; }
.example .math {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: .92rem; background: var(--bg-alt); border-left: 4px solid var(--accent);
  padding: .7rem 1rem; border-radius: 0 8px 8px 0;
}

/* FAQ */
.faq-item {
  border: 1px solid var(--line); border-radius: var(--radius);
  margin-bottom: .7rem; background: #fff;
}
.faq-item summary {
  cursor: pointer; font-weight: 700; padding: 1rem 1.2rem; list-style: none;
  display: flex; justify-content: space-between; align-items: center; gap: 1rem;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-size: 1.4rem; color: var(--accent); flex: none; }
.faq-item[open] summary::after { content: "–"; }
.faq-item .faq-a, .faq-item p { padding: 0 1.2rem 1.1rem; margin: 0; max-width: 68ch; }

/* Footer */
.site-footer {
  background: var(--brand); color: #cbd5e1; padding: 2.2rem 0; font-size: .92rem;
}
.site-footer .disclaimer { max-width: 68ch; }
.site-footer nav { margin: 1.2rem 0; }
.site-footer nav a { color: #fff; margin-right: 1.2rem; text-decoration: none; }
.site-footer nav a:hover { text-decoration: underline; }
.copyright { color: #94a3b8; font-size: .85rem; margin: 0; }

/* Legal pages */
.legal { padding: 2.5rem 0; }
.legal h1 { font-size: 1.8rem; }
.legal p, .legal li { max-width: 68ch; }

/* Desktop */
@media (min-width: 700px) {
  .hero h1 { font-size: 2.6rem; }
  .presets { grid-template-columns: repeat(3, 1fr); }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .result-grid { grid-template-columns: repeat(4, 1fr); }
}
@media (min-width: 1024px) {
  .cards { grid-template-columns: repeat(4, 1fr); }
  .card-links { flex-direction: column; }
  .card-links .btn { width: 100%; }
  .ad-slot-sidebar { float: right; width: 300px; margin: 0 0 1rem 1.5rem; min-height: 250px; }
}

/* Ads not live yet — hide empty slots until AdSense approved */
.ad-slot{display:none!important}