:root {
  --ink: #10231d;
  --muted: #5f716a;
  --line: #dce7df;
  --cream: #fbf7ed;
  --sun: #f8b931;
  --sun-dark: #d88905;
  --leaf: #0d6b4f;
  --leaf-dark: #064432;
  --mint: #e7f5ee;
  --white: #fff;
  --shadow: 0 20px 60px rgba(14, 63, 44, .14);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: linear-gradient(180deg, #fffaf0 0%, #f5fbf7 42%, #ffffff 100%);
}
a { color: inherit; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px clamp(18px, 4vw, 56px);
  backdrop-filter: blur(14px);
  background: rgba(255, 250, 240, .86);
  border-bottom: 1px solid rgba(220, 231, 223, .75);
}
.brand { display: inline-flex; align-items: center; text-decoration: none; }
.brand img { display: block; width: min(330px, 58vw); height: auto; filter: drop-shadow(0 8px 18px rgba(6, 59, 44, .12)); }
nav { display: flex; gap: 18px; color: var(--muted); font-size: 14px; }
nav a { text-decoration: none; }
nav a:hover { color: var(--leaf); }
main { overflow: hidden; }
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(320px, .72fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
  padding: clamp(44px, 8vw, 96px) clamp(18px, 5vw, 72px) clamp(28px, 7vw, 72px);
}
.eyebrow, .mini-label { margin: 0 0 10px; color: var(--sun-dark); text-transform: uppercase; letter-spacing: .12em; font-size: 12px; font-weight: 850; }
h1, h2, h3, h4, p { margin-top: 0; }
h1 { font-size: clamp(44px, 8vw, 82px); line-height: .92; letter-spacing: -.075em; margin-bottom: 20px; }
h2 { font-size: clamp(30px, 4vw, 48px); line-height: 1; letter-spacing: -.055em; margin-bottom: 14px; }
h3 { font-size: 22px; letter-spacing: -.03em; }
.lead { color: #385249; font-size: clamp(18px, 2vw, 22px); line-height: 1.55; max-width: 720px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 18px; }
.button, button {
  border: 0;
  border-radius: 999px;
  padding: 13px 18px;
  cursor: pointer;
  font-weight: 800;
  text-decoration: none;
  font-size: 15px;
}
.primary { color: white; background: var(--leaf); box-shadow: 0 12px 30px rgba(13,107,79,.22); }
.secondary { background: white; border: 1px solid var(--line); }
.trust-note { color: var(--muted); font-size: 14px; }
.hero-card, .results-panel, .calc-form, .cards article, .guide-section, .partner-section {
  background: rgba(255,255,255,.88);
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: var(--shadow);
}
.hero-card { padding: 28px; transform: rotate(1.5deg); }
.calculator-shell { padding: 42px clamp(18px, 5vw, 72px); }
.section-heading { max-width: 780px; margin-bottom: 24px; }
.section-heading p { color: var(--muted); line-height: 1.6; }
.calculator-paths { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin: 8px 0 16px; }
.path-card { text-align: left; border-radius: 24px; padding: 20px; background: white; border: 2px solid var(--line); box-shadow: 0 12px 34px rgba(14, 63, 44, .08); color: var(--ink); }
.path-card:hover { transform: translateY(-1px); border-color: #b7dcca; }
.path-card.active { background: linear-gradient(135deg, var(--leaf-dark), var(--leaf)); color: white; border-color: var(--leaf-dark); box-shadow: 0 18px 46px rgba(13,107,79,.25); }
.path-card strong { display: block; font-size: 18px; letter-spacing: -.03em; margin: 8px 0 6px; }
.path-card small { display: block; color: var(--muted); line-height: 1.45; font-weight: 650; }
.path-card.active small { color: #d9f0e7; }
.path-icon { display: inline-grid; place-items: center; width: 38px; height: 38px; border-radius: 14px; background: var(--mint); }
.path-card.active .path-icon { background: rgba(255,255,255,.16); }
.mode-tabs { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 18px; padding: 8px; border-radius: 999px; background: rgba(231,245,238,.85); border: 1px solid #cfe8dc; width: fit-content; }
.tab { background: transparent; color: var(--leaf-dark); border: 1px solid transparent; padding: 10px 14px; }
.tab.active { background: white; color: var(--leaf-dark); border-color: #cfe8dc; box-shadow: 0 8px 20px rgba(14, 63, 44, .1); }
.calculator-layout { display: grid; grid-template-columns: minmax(0, .95fr) minmax(340px, .7fr); gap: 20px; align-items: start; }
.calc-form { display: none; padding: 24px; }
.calc-form.active { display: block; }
label { display: grid; gap: 7px; margin: 14px 0; color: #29483e; font-weight: 750; font-size: 14px; }
input, select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px 13px;
  color: var(--ink);
  background: white;
  font: inherit;
}
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.appliance-toolbar { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }
button.small { padding: 9px 12px; background: var(--mint); color: var(--leaf-dark); font-size: 13px; }
button.ghost { background: white; border: 1px solid var(--line); }
.appliance-table { display: grid; gap: 8px; }
.appliance-row { display: grid; grid-template-columns: 1.3fr .7fr .7fr .7fr auto; gap: 8px; align-items: end; padding: 10px; background: #f8fbf8; border: 1px solid var(--line); border-radius: 18px; }
.appliance-row label { margin: 0; font-size: 12px; }
.remove { background: #ffe8df; color: #9b3214; border-radius: 12px; padding: 10px 12px; }
.check-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 12px; margin: 12px 0 18px; }
.check-grid label { display: flex; align-items: center; gap: 8px; margin: 0; padding: 10px; border: 1px solid var(--line); border-radius: 14px; background: #fbfdfb; font-weight: 700; }
.check-grid input { width: auto; }
.results-panel { padding: 24px; position: sticky; top: 84px; }
.result-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 18px 0; }
.result-grid div { padding: 14px; border-radius: 18px; background: var(--mint); border: 1px solid #cfe8dc; }
.result-grid strong { display: block; font-size: 22px; letter-spacing: -.04em; }
.result-grid span { display: block; color: var(--muted); font-size: 13px; margin-top: 4px; }
.result-grid.compact strong { font-size: 20px; }
.recommendation { padding: 16px; border-left: 5px solid var(--sun); background: #fff8e5; border-radius: 16px; line-height: 1.55; color: #4c3a13; }
.shopping-list { margin-top: 18px; }
.shopping-list ul { margin: 0; padding-left: 20px; line-height: 1.75; color: #29483e; }
.disclaimer { margin-top: 18px; color: var(--muted); font-size: 12px; line-height: 1.45; }
.cards-section, .guide-section, .partner-section { margin: 36px clamp(18px, 5vw, 72px); }
.cards-section { padding: 8px 0 18px; }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.cards article { padding: 22px; box-shadow: none; }
.cards p, .partner-section p { color: var(--muted); line-height: 1.6; }
.guide-section { display: grid; grid-template-columns: .8fr 1fr; gap: 20px; padding: 28px; }
.guide-list { columns: 2; margin: 0; padding-left: 20px; line-height: 2; color: #29483e; }
.partner-section { padding: 30px; background: var(--leaf-dark); color: white; }
.partner-section .eyebrow { color: var(--sun); }
.partner-section p { color: #d4e4dd; max-width: 900px; }
.site-footer { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; padding: 30px clamp(18px, 5vw, 72px); color: var(--muted); border-top: 1px solid var(--line); }
@media (max-width: 920px) {
  .hero, .calculator-layout, .guide-section, .calculator-paths { grid-template-columns: 1fr; }
  .results-panel { position: static; }
  .cards { grid-template-columns: 1fr; }
  .hero-card { transform: none; }
}
@media (max-width: 620px) {
  nav { display: none; }
  .two-col, .result-grid, .check-grid { grid-template-columns: 1fr; }
  .mode-tabs { width: 100%; border-radius: 22px; }
  .tab { flex: 1 1 100%; }
  .appliance-row { grid-template-columns: 1fr 1fr; }
  .appliance-row label:first-child { grid-column: 1 / -1; }
  .guide-list { columns: 1; }
}
.inner-page { padding: clamp(34px, 6vw, 76px) clamp(18px, 5vw, 72px); }
.page-hero.narrow { max-width: 880px; margin: 0 auto 28px; }
.page-hero .button { display: inline-flex; margin-top: 8px; }
.content-card { max-width: 900px; margin: 18px auto; padding: 28px; background: rgba(255,255,255,.9); border: 1px solid var(--line); border-radius: 28px; box-shadow: var(--shadow); line-height: 1.65; }
.content-card h2 { font-size: clamp(26px, 3vw, 36px); }
.content-card li { margin: 8px 0; }
.article-grid { max-width: 1080px; margin: 24px auto; display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 16px; }
.article-grid a { display: block; padding: 22px; text-decoration: none; background: white; border: 1px solid var(--line); border-radius: 24px; box-shadow: 0 12px 34px rgba(14, 63, 44, .08); }
.article-grid a:hover { border-color: #b7dcca; transform: translateY(-1px); }
.article-grid strong { display: block; font-size: 20px; letter-spacing: -.03em; margin-bottom: 8px; }
.article-grid span { color: var(--muted); line-height: 1.5; }
.guide-list a, .site-footer a { color: inherit; }
@media(max-width: 760px){ .article-grid { grid-template-columns: 1fr; } }
.assumptions-box { margin-top: 16px; padding: 14px 16px; border-radius: 16px; background: #f6faf8; border: 1px solid var(--line); color: #36584d; }
.assumptions-box:empty { display: none; }
.assumptions-box h4 { margin: 0 0 8px; }
.assumptions-box ul { margin: 0; padding-left: 18px; line-height: 1.55; font-size: 13px; }
.formula-box { padding: 14px 16px; margin: 16px 0; border-radius: 16px; background: var(--mint); border: 1px solid #cfe8dc; font-weight: 800; color: var(--leaf-dark); line-height: 1.6; }
.related-card a { color: var(--leaf-dark); font-weight: 800; }
.article-page article { max-width: 980px; margin: 0 auto; }
.toc-card { border-left: 6px solid var(--sun); }