/* Stylesheet for WOW Eco Calculators */
:root {
  --bg-color: #F8FAFC;
  --card-bg: #FFFFFF;
  --text-main: #0F172A;
  --text-muted: #475569;
  --accent: #16A34A;
  --border-color: #E2E8F0;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; background: var(--bg-color); color: var(--text-main); line-height: 1.6; }
.site-header { background: var(--card-bg); border-bottom: 1px solid var(--border-color); padding: 1rem 1.5rem; position: sticky; top: 0; z-index: 100; }
.nav-container { max-width: 1100px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; }
.logo { font-size: 1.25rem; font-weight: 700; color: var(--text-main); text-decoration: none; }
.nav-links { display: flex; list-style: none; gap: 1.25rem; }
.nav-links a { text-decoration: none; color: var(--text-muted); font-weight: 500; }
.nav-links a:hover, .nav-links a.active { color: var(--accent); }
.container { max-width: 900px; margin: 2rem auto; padding: 0 1rem; }
.tool-card { background: var(--card-bg); border: 1px solid var(--border-color); border-radius: 12px; padding: 2rem; margin-bottom: 2rem; }
.direct-answer-box { background: rgba(0,0,0,0.03); border-left: 4px solid var(--accent); padding: 1rem; border-radius: 4px; margin: 1rem 0 1.5rem 0; }
.site-footer { background: var(--card-bg); border-top: 1px solid var(--border-color); padding: 2.5rem 1.5rem; margin-top: 3rem; color: var(--text-muted); font-size: 0.9rem; }
.footer-container { max-width: 1100px; margin: 0 auto; display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 2rem; }
.footer-col ul { list-style: none; }
.footer-col a { color: var(--text-muted); text-decoration: none; }
.footer-col a:hover { color: var(--accent); }
.footer-bottom { max-width: 1100px; margin: 2rem auto 0; padding-top: 1.5rem; border-top: 1px solid var(--border-color); text-align: center; }