/* 5280 Radon — Design System */
:root {
  --navy: #1B2A4A;
  --orange: #E85D04;
  --orange-dark: #C94E03;
  --white: #FFFFFF;
  --gray-light: #F5F7FA;
  --gray: #6B7280;
  --text: #1F2937;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; color: var(--text); line-height: 1.6; font-size: 16px; }
img { max-width: 100%; height: auto; }
a { color: var(--orange); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Top bar */
.top-bar { background: var(--navy); color: #fff; padding: 8px 0; font-size: 0.875rem; text-align: center; }
.top-bar a { color: #FFB347; font-weight: 700; }

/* Header */
header { background: var(--white); padding: 1rem 0; border-bottom: 2px solid var(--orange); position: sticky; top: 0; z-index: 1000; box-shadow: 0 2px 8px rgba(0,0,0,0.08); }
.header-inner { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.logo { font-size: 1.5rem; font-weight: 800; color: var(--navy); letter-spacing: -0.5px; }
.logo span { color: var(--orange); }
nav { display: flex; gap: 1.5rem; align-items: center; }
nav a { color: var(--navy); font-weight: 500; font-size: 0.9rem; }
nav a:hover { color: var(--orange); text-decoration: none; }
.header-cta { display: flex; align-items: center; gap: 1rem; }
.header-phone { font-weight: 700; color: var(--navy); font-size: 1rem; }
.btn { display: inline-block; padding: 10px 24px; border-radius: 4px; font-weight: 700; font-size: 0.95rem; cursor: pointer; border: none; transition: background 0.2s; text-decoration: none; }
.btn-primary { background: var(--orange); color: #fff; }
.btn-primary:hover { background: var(--orange-dark); text-decoration: none; color: #fff; }
.btn-outline { background: transparent; color: var(--navy); border: 2px solid var(--navy); }
.btn-outline:hover { background: var(--navy); color: #fff; text-decoration: none; }
.btn-lg { padding: 14px 32px; font-size: 1.1rem; }

/* Container */
.container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }

/* Hero */
.hero { background: var(--navy); color: #fff; padding: 80px 0; }
.hero h1 { font-size: 2.4rem; font-weight: 800; line-height: 1.2; margin-bottom: 1rem; }
.hero h1 span { color: var(--orange); }
.hero p { font-size: 1.15rem; opacity: 0.9; margin-bottom: 2rem; max-width: 600px; }
.hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: center; }
.hero-ctas { display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 1.5rem; }

/* Trust bar */
.trust-bar { background: var(--gray-light); padding: 1rem 0; border-bottom: 1px solid #e5e7eb; }
.trust-items { display: flex; gap: 2rem; align-items: center; flex-wrap: wrap; justify-content: center; }
.trust-item { display: flex; align-items: center; gap: 0.5rem; font-size: 0.875rem; font-weight: 600; color: var(--navy); }
.trust-item .icon { font-size: 1.2rem; }

/* Sections */
.section { padding: 80px 0; }
.section-bg { background: var(--gray-light); }
.section-navy { background: var(--navy); color: #fff; }
h2 { font-size: 2rem; font-weight: 800; color: var(--navy); margin-bottom: 1rem; }
.section-navy h2 { color: #fff; }
h3 { font-size: 1.25rem; font-weight: 700; color: var(--navy); margin-bottom: 0.5rem; }
.section-navy h3 { color: #fff; }
.section-header { text-align: center; margin-bottom: 3rem; }
.section-header p { font-size: 1.1rem; color: var(--gray); max-width: 600px; margin: 0 auto; }

/* Cards */
.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 2rem; }
.card { background: #fff; border-radius: 8px; padding: 2rem; box-shadow: 0 2px 8px rgba(0,0,0,0.06); border-top: 3px solid var(--orange); }
.section-bg .card { background: #fff; }
.section-navy .card { background: rgba(255,255,255,0.08); border-top-color: var(--orange); color: #fff; }
.card-icon { font-size: 2.5rem; margin-bottom: 1rem; }

/* Steps */
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 2rem; counter-reset: step; }
.step { text-align: center; position: relative; }
.step-number { width: 56px; height: 56px; background: var(--orange); color: #fff; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.5rem; font-weight: 800; margin: 0 auto 1rem; }

/* Guarantees */
.guarantees { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 2rem; }
.guarantee { background: rgba(255,255,255,0.1); border-radius: 8px; padding: 2rem; text-align: center; border: 1px solid rgba(255,255,255,0.15); }
.guarantee-icon { font-size: 3rem; margin-bottom: 1rem; }
.guarantee h3 { font-size: 1.1rem; color: var(--orange); }

/* Forms */
.form-card { background: #fff; border-radius: 8px; padding: 2rem; box-shadow: 0 4px 20px rgba(0,0,0,0.12); }
.form-title { font-size: 1.3rem; font-weight: 700; color: var(--navy); margin-bottom: 1.5rem; }
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; font-size: 0.875rem; font-weight: 600; color: var(--navy); margin-bottom: 0.4rem; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 10px 14px; border: 1px solid #d1d5db; border-radius: 4px; font-size: 1rem; font-family: inherit;
  transition: border-color 0.2s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline: none; border-color: var(--orange); box-shadow: 0 0 0 3px rgba(232,93,4,0.1); }
.form-group textarea { resize: vertical; min-height: 80px; }
.form-submit { width: 100%; padding: 14px; background: var(--orange); color: #fff; font-size: 1.1rem; font-weight: 700; border: none; border-radius: 4px; cursor: pointer; transition: background 0.2s; }
.form-submit:hover { background: var(--orange-dark); }
.form-msg { display: none; padding: 12px; border-radius: 4px; margin-top: 12px; }

/* Price table */
.price-table { width: 100%; border-collapse: collapse; margin: 2rem 0; }
.price-table th { background: var(--navy); color: #fff; padding: 12px 16px; text-align: left; }
.price-table td { padding: 12px 16px; border-bottom: 1px solid #e5e7eb; }
.price-table tr:nth-child(even) td { background: var(--gray-light); }
.price-highlight { color: var(--orange); font-weight: 700; }

/* FAQ */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid #e5e7eb; padding: 1.5rem 0; }
.faq-item:last-child { border-bottom: none; }
.faq-q { font-weight: 700; color: var(--navy); font-size: 1.05rem; margin-bottom: 0.5rem; cursor: pointer; }
.faq-a { color: var(--gray); line-height: 1.7; }

/* Legal banner */
.legal-banner { background: #FEF3C7; border: 2px solid #F59E0B; border-radius: 8px; padding: 1rem 1.5rem; margin-bottom: 2rem; font-weight: 600; color: #92400E; }

/* Reviews */
.reviews-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.5rem; }
.review-card { background: #fff; border-radius: 8px; padding: 1.5rem; box-shadow: 0 2px 8px rgba(0,0,0,0.06); }
.stars { color: #F59E0B; font-size: 1.1rem; margin-bottom: 0.5rem; }
.review-text { color: var(--gray); font-style: italic; margin-bottom: 1rem; }
.reviewer { font-weight: 700; font-size: 0.875rem; color: var(--navy); }

/* Footer */
footer { background: var(--navy); color: rgba(255,255,255,0.8); padding: 3rem 0 1.5rem; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 2rem; margin-bottom: 2rem; }
.footer-col h4 { color: #fff; font-weight: 700; margin-bottom: 1rem; }
.footer-col a { color: rgba(255,255,255,0.7); display: block; margin-bottom: 0.4rem; font-size: 0.9rem; }
.footer-col a:hover { color: var(--orange); text-decoration: none; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding-top: 1.5rem; text-align: center; font-size: 0.875rem; }

/* Mobile floating CTA */
.mobile-cta { display: none; position: fixed; bottom: 1.5rem; right: 1.5rem; z-index: 999; }
.mobile-cta a { background: var(--orange); color: #fff; padding: 14px 20px; border-radius: 50px; font-weight: 700; box-shadow: 0 4px 16px rgba(232,93,4,0.4); display: flex; align-items: center; gap: 0.5rem; }

/* Breadcrumb */
.breadcrumb { padding: 1rem 0; font-size: 0.875rem; color: var(--gray); }
.breadcrumb a { color: var(--navy); }

/* Alert/callout */
.callout { background: var(--orange); color: #fff; padding: 2rem; border-radius: 8px; text-align: center; }
.callout h3 { color: #fff; font-size: 1.3rem; }
.callout .btn-outline { border-color: #fff; color: #fff; }
.callout .btn-outline:hover { background: #fff; color: var(--orange); }

/* Responsive */
@media (max-width: 768px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 1.8rem; }
  nav { display: none; }
  .mobile-cta { display: block; }
  .header-phone { display: none; }
  h2 { font-size: 1.6rem; }
  .section { padding: 60px 0; }
}