:root {
  --bg: #f8fafc;
  --bg-elev: #ffffff;
  --ink: #0f172a;
  --ink-muted: #64748b;
  --accent: #059669;
  --accent-light: #d1fae5;
  --accent-dark: #047857;
  --warning-bg: #fef3c7;
  --line: #e2e8f0;
  --radius: 16px;
  --shadow: 0 10px 40px rgba(15, 23, 42, 0.08);
  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
}
img { max-width: 100%; height: auto; }
a { color: var(--accent-dark); }
.container { width: min(1100px, 92vw); margin: 0 auto; }
.skip-link {
  position: absolute; left: -9999px; top: 0;
}
.skip-link:focus { left: 1rem; top: 1rem; z-index: 999; background: #fff; padding: .5rem 1rem; }

.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.navbar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; padding: 1rem 0;
}
.logo {
  font-weight: 800; font-size: 1.1rem; color: var(--ink); text-decoration: none;
  display: flex; align-items: center; gap: .6rem;
}
.logo img { width: 36px; height: 36px; border-radius: 10px; }
.nav-links { display: flex; gap: 1.25rem; list-style: none; margin: 0; padding: 0; }
.nav-links a { text-decoration: none; color: var(--ink-muted); font-weight: 500; }
.nav-links a:hover { color: var(--ink); }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: .9rem 1.4rem; border-radius: 999px; font-weight: 700;
  text-decoration: none; border: none; cursor: pointer; font-size: 1rem;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); }
.btn-dark { background: #000; color: #fff; }
.btn-secondary {
  background: var(--bg-elev); color: var(--ink);
  border: 1px solid var(--line);
}
.btn-sm { padding: .55rem 1rem; font-size: .9rem; }

.hero {
  padding: 4.5rem 0 3rem;
}
.hero-grid {
  display: grid; grid-template-columns: 1.1fr .9fr; gap: 2.5rem; align-items: center;
}
.eyebrow {
  color: var(--accent); font-weight: 700; text-transform: uppercase;
  letter-spacing: .08em; font-size: .8rem;
}
.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  line-height: 1.08; letter-spacing: -.03em; margin: .6rem 0 1rem;
}
.hero p.lede { color: var(--ink-muted); font-size: 1.15rem; max-width: 52ch; }
.hero-cta { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 1.5rem; }
.trust-row {
  display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 1.5rem;
  color: var(--ink-muted); font-size: .92rem;
}

.calc-card {
  background: var(--bg-elev); border: 1px solid var(--line);
  border-radius: 24px; padding: 1.5rem; box-shadow: var(--shadow);
}
.calc-card h2 { margin: 0 0 1rem; font-size: 1.2rem; }
label { display: block; font-weight: 600; margin-bottom: .4rem; font-size: .92rem; }
input[type="range"] { width: 100%; accent-color: var(--accent); }
select, input[type="email"], input[type="text"] {
  width: 100%; padding: .8rem 1rem; border-radius: 12px;
  border: 1px solid var(--line); font: inherit;
}
.muni-row { margin: 1rem 0; }
.savings-box {
  background: var(--accent-light); border: 1px solid #a7f3d0;
  border-radius: 16px; padding: 1rem 1.2rem; margin-top: 1rem;
}
.savings-monthly { font-size: 2rem; font-weight: 800; }
.savings-lifetime { font-size: 1.5rem; font-weight: 800; color: var(--accent-dark); }
.savings-caption { color: var(--accent-dark); font-size: .85rem; }

.section { padding: 3.5rem 0; }
.section-alt { background: #fff; border-block: 1px solid var(--line); }
.section-head { text-align: center; max-width: 680px; margin: 0 auto 2rem; }
.section-head h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); margin-bottom: .5rem; }
.steps {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem;
}
.step-card {
  background: var(--bg-elev); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 1.25rem;
}
.step-num {
  width: 2rem; height: 2rem; border-radius: 999px;
  background: var(--accent); color: #fff; display: grid; place-items: center;
  font-weight: 800; margin-bottom: .8rem;
}

.faq details {
  background: #fff; border: 1px solid var(--line); border-radius: 12px;
  padding: 1rem 1.2rem; margin-bottom: .7rem;
}
.faq summary { cursor: pointer; font-weight: 700; }
.faq p { color: var(--ink-muted); margin: .6rem 0 0; }

.site-footer {
  padding: 2rem 0 3rem; color: var(--ink-muted); font-size: .9rem;
  border-top: 1px solid var(--line);
}
.footer-grid {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem;
}
.footer-links { display: flex; gap: 1rem; flex-wrap: wrap; }
.footer-links a { color: var(--ink-muted); text-decoration: none; }

.legal-page main { padding: 3rem 0 4rem; }
.legal-page h1 { margin-top: 0; }
.legal-page h2 { margin-top: 2rem; }

.app-badge {
  display: inline-flex; align-items: center; gap: .5rem;
  background: #000; color: #fff; border-radius: 12px;
  padding: .65rem 1rem; text-decoration: none; font-weight: 600;
}

@media (max-width: 860px) {
  .hero-grid, .steps { grid-template-columns: 1fr; }
  .nav-links { display: none; }
}