/* Colorado Springs Radon Mitigation — shared stylesheet. Mobile-first, no frameworks, no webfonts. */
:root{
  --slate-950:#0f172a;
  --slate-900:#1e293b;
  --slate-700:#334155;
  --amber:#f59e0b;
  --amber-dark:#b45309;
  --red:#dc2626;
  --red-dark:#991b1b;
  --ink:#1e293b;
  --muted:#64748b;
  --line:#e2e8f0;
  --bg:#f8fafc;
  --card:#ffffff;
  --green:#15803d;
  --radius:12px;
  --shadow:0 8px 24px rgba(15,23,42,.07);
  --max:1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Inter,Helvetica,Arial,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.65;
  font-size:17px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto}
a{color:var(--amber-dark)}
.container{max-width:var(--max);margin:0 auto;padding:0 20px}
section{padding:52px 0}
h1,h2,h3{line-height:1.28;color:var(--slate-950);margin:0 0 .6em}
h1{font-size:clamp(1.9rem,4.5vw,2.8rem);letter-spacing:-.01em}
h2{font-size:clamp(1.35rem,3vw,1.8rem);margin-top:1.5em}
h3{font-size:1.12rem}
p{margin:0 0 1em}
.lead{font-size:1.14rem;color:#334155;max-width:64ch}
.eyebrow{display:inline-block;font-size:.78rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--amber-dark);margin-bottom:.6em}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(15,23,42,.98);backdrop-filter:blur(6px);border-bottom:2px solid var(--amber)}
.header-inner{display:flex;align-items:center;gap:18px;min-height:68px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:#fff;font-weight:800;font-size:1.08rem;margin-right:auto}
.brand strong{color:var(--amber);font-weight:800}
.brand-mark{width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--amber),var(--red));display:inline-flex;align-items:center;justify-content:center;color:#fff;font-size:1.05rem;font-weight:800}
.main-nav{display:flex;gap:2px}
.main-nav a{text-decoration:none;color:#cbd5e1;font-weight:600;font-size:.93rem;padding:10px 11px;border-radius:8px;white-space:nowrap}
.main-nav a:hover{background:rgba(255,255,255,.08);color:#fff}
.header-cta{display:flex;align-items:center;gap:12px}
.phone-link{font-weight:800;color:#fff;text-decoration:none;white-space:nowrap;font-size:1rem}
.phone-link:hover{color:var(--amber)}
.nav-toggle{display:none;background:none;border:1px solid rgba(255,255,255,.25);border-radius:8px;font-size:1.3rem;padding:6px 12px;cursor:pointer;color:#fff}

/* Buttons */
.btn{display:inline-block;text-decoration:none;font-weight:700;border-radius:10px;padding:13px 24px;font-size:1rem;border:2px solid transparent;cursor:pointer;transition:transform .06s ease}
.btn:active{transform:scale(.98)}
.btn-primary{background:var(--amber);color:var(--slate-950)}
.btn-primary:hover{background:#fbbf24;color:var(--slate-950)}
.btn-outline{background:#fff;color:var(--slate-950);border-color:var(--line)}
.btn-outline:hover{border-color:var(--amber-dark);color:var(--amber-dark)}
.btn-large{padding:16px 32px;font-size:1.08rem}
.btn-block{width:100%;text-align:center}

/* Hero */
.hero{background:linear-gradient(165deg,#0f172a 0%,#1e293b 60%,#3f2d06 130%);color:#fff;padding:68px 0;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;background:radial-gradient(520px 260px at 88% 18%,rgba(245,158,11,.22),transparent 70%);pointer-events:none}
.hero h1{color:#fff;max-width:22ch}
.hero .lead{color:#e2e8f0;max-width:62ch}
.hero-ctas{display:flex;gap:14px;flex-wrap:wrap;margin:26px 0 18px}
.hero .btn-outline{background:transparent;color:#fff;border-color:rgba(255,255,255,.4)}
.hero .btn-outline:hover{border-color:var(--amber);color:var(--amber)}
.alert-strip{display:inline-flex;align-items:center;gap:10px;background:rgba(220,38,38,.16);border:1px solid rgba(220,38,38,.55);color:#fecaca;font-size:.9rem;font-weight:700;padding:9px 16px;border-radius:999px;margin-bottom:18px}
.trust-chips{display:flex;gap:10px;flex-wrap:wrap;list-style:none;padding:0;margin:18px 0 0}
.trust-chips li{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.2);color:#e2e8f0;font-size:.87rem;font-weight:600;padding:8px 14px;border-radius:999px}

/* Cards & grids */
.grid{display:grid;gap:20px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow)}
.card h3{margin-top:0}
.icon{width:44px;height:44px;border-radius:11px;background:#fef3c7;color:var(--amber-dark);display:inline-flex;align-items:center;justify-content:center;font-size:1.35rem;margin-bottom:12px}

/* Answer-first blocks */
.answer{background:#fffbeb;border-left:4px solid var(--amber);border-radius:0 12px 12px 0;padding:18px 22px;margin:0 0 1.2em}
.answer p{margin:0}
.key-takeaways{background:var(--slate-900);color:#e2e8f0;border-radius:var(--radius);padding:26px 28px;margin:0 0 1.5em;border-top:3px solid var(--amber)}
.key-takeaways h2,.key-takeaways h3{color:#fff;margin-top:0}
.key-takeaways ul{margin:0;padding-left:1.2em}
.key-takeaways li{margin-bottom:.5em}
.health-note{background:#fef2f2;border:1px solid #fecaca;border-radius:var(--radius);padding:20px 24px;margin:0 0 1.5em}
.health-note h3{color:var(--red-dark);margin-top:0}
.health-note p:last-child{margin-bottom:0}

/* Tables */
.table-wrap{overflow-x:auto;margin:0 0 1.5em;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
table{width:100%;border-collapse:collapse;font-size:.95rem;min-width:560px}
th,td{text-align:left;padding:13px 16px;border-bottom:1px solid var(--line);vertical-align:top}
th{background:var(--slate-900);color:#fff;font-weight:700}
tr:last-child td{border-bottom:none}
tbody tr:nth-child(even){background:#f8fafc}
.level-safe{background:#f0fdf4 !important}
.level-caution{background:#fffbeb !important}
.level-action{background:#fef2f2 !important}

/* pCi/L meter */
.meter{margin:0 0 1.5em;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.meter-bar{height:34px;border-radius:8px;background:linear-gradient(90deg,#22c55e 0%,#22c55e 20%,#f59e0b 20%,#f59e0b 40%,#dc2626 40%,#dc2626 100%);position:relative;margin:8px 0 4px}
.meter-marker{position:absolute;top:-8px;bottom:-8px;width:3px;background:var(--slate-950)}
.meter-labels{display:flex;justify-content:space-between;font-size:.82rem;color:var(--muted);font-weight:600}
.meter-note{font-size:.9rem;color:var(--muted);margin:10px 0 0}

/* Steps */
.steps{counter-reset:step;list-style:none;padding:0;margin:0 0 1.5em;display:grid;gap:16px}
.steps li{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px 20px 20px 76px;position:relative;box-shadow:var(--shadow)}
.steps li::before{counter-increment:step;content:counter(step);position:absolute;left:20px;top:20px;width:40px;height:40px;border-radius:50%;background:var(--slate-900);color:var(--amber);font-weight:800;display:flex;align-items:center;justify-content:center;font-size:1.1rem}
.steps h3{margin:0 0 .3em}
.steps p{margin:0;color:#475569}

/* FAQ */
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);margin-bottom:12px;overflow:hidden}
.faq-q{width:100%;background:none;border:none;text-align:left;font-size:1.04rem;font-weight:700;color:var(--slate-950);padding:18px 20px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:12px;font-family:inherit}
.faq-q::after{content:"+";font-size:1.4rem;color:var(--amber-dark);flex-shrink:0}
.faq-item.open .faq-q::after{content:"–"}
.faq-a{display:none;padding:0 20px 20px;color:#475569}
.faq-item.open .faq-a{display:block}

/* CTA band */
.cta-band{background:linear-gradient(135deg,var(--slate-900),var(--slate-950));color:#fff;border-radius:18px;padding:44px;text-align:center;margin:52px 0;border-top:3px solid var(--amber)}
.cta-band h2{color:#fff;margin-top:0}
.cta-band p{color:#cbd5e1;max-width:54ch;margin:0 auto 1.4em}
.cta-band .phone-big{display:block;margin-top:16px;color:var(--amber);font-weight:800;font-size:1.4rem;text-decoration:none}

/* Forms */
.form-card{background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);padding:34px;max-width:660px;margin:0 auto}
.form-grid{display:grid;gap:16px}
.form-grid .two{display:grid;grid-template-columns:1fr 1fr;gap:16px}
label{font-weight:700;font-size:.92rem;color:var(--slate-950);display:block;margin-bottom:6px}
input,select,textarea{width:100%;border:1.5px solid var(--line);border-radius:10px;padding:12px 14px;font-size:1rem;font-family:inherit;background:#fff}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--amber);box-shadow:0 0 0 3px rgba(245,158,11,.18)}
.form-note{font-size:.88rem;color:var(--muted);text-align:center}
.form-error{display:none;background:#fef2f2;border:1px solid #fecaca;color:var(--red-dark);border-radius:10px;padding:12px 16px;margin-bottom:16px;font-size:.95rem}

/* Areas */
.area-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px;list-style:none;padding:0;margin:0}
.area-grid li{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 18px}
.area-grid strong{color:var(--slate-950);display:block;margin-bottom:4px}
.area-grid span{font-size:.9rem;color:var(--muted)}

/* Footer */
.site-footer{background:var(--slate-950);color:#94a3b8;padding:52px 0 28px;margin-top:60px;border-top:3px solid var(--amber)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;margin-bottom:32px}
.site-footer h4{color:#fff;margin:0 0 .8em;font-size:1rem}
.site-footer a{color:#94a3b8;text-decoration:none;font-size:.94rem}
.site-footer a:hover{color:#fff;text-decoration:underline}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin-bottom:.55em}
.footer-brand{color:#fff;font-weight:800;font-size:1.15rem;text-decoration:none}
.footer-brand strong{color:var(--amber)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding-top:22px;font-size:.84rem;color:#64748b;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
.disclosure{background:rgba(255,255,255,.05);border-radius:12px;padding:16px 20px;font-size:.85rem;color:#94a3b8;margin-bottom:28px}

/* Breadcrumbs */
.breadcrumbs{font-size:.88rem;color:var(--muted);margin:0 0 8px}
.breadcrumbs a{color:var(--muted);text-decoration:none}
.breadcrumbs a:hover{color:var(--amber-dark)}

/* Content split + sidebar */
.content-split{display:grid;grid-template-columns:1fr 320px;gap:36px;align-items:start}
.sidebar{position:sticky;top:92px}
.sidebar .card{margin-bottom:20px}
.toc{list-style:none;padding:0;margin:0}
.toc li{margin-bottom:.4em}
.toc a{text-decoration:none;font-size:.94rem;color:#475569}
.toc a:hover{color:var(--amber-dark)}

.checklist{list-style:none;padding:0;margin:0 0 1.5em}
.checklist li{padding:10px 0 10px 34px;position:relative;border-bottom:1px solid var(--line)}
.checklist li::before{content:"✓";position:absolute;left:4px;top:10px;color:var(--green);font-weight:800}

.stat-row{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:0 0 1.5em}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px;text-align:center;box-shadow:var(--shadow);border-top:3px solid var(--amber)}
.stat b{display:block;font-size:1.65rem;color:var(--slate-950)}
.stat b .unit{font-size:1rem;color:var(--muted);font-weight:600}
.stat span{font-size:.87rem;color:var(--muted)}

@media (max-width:900px){
  .content-split{grid-template-columns:1fr}
  .sidebar{position:static}
  .footer-grid{grid-template-columns:1fr 1fr}
  .main-nav{position:fixed;inset:68px 0 auto 0;background:var(--slate-950);flex-direction:column;padding:12px 20px 20px;border-bottom:2px solid var(--amber);display:none}
  .main-nav.open{display:flex}
  .main-nav a{color:#e2e8f0}
  .nav-toggle{display:block}
  .header-cta .phone-link{display:none}
  .grid-2,.grid-3{grid-template-columns:1fr}
  .stat-row{grid-template-columns:1fr}
  .form-grid .two{grid-template-columns:1fr}
  .cta-band{padding:32px 22px}
  section{padding:40px 0}
}
@media (max-width:560px){
  .footer-grid{grid-template-columns:1fr}
  .hero{padding:52px 0}
}

/* Hero showcase image */
.hero-media { margin: 2.5rem auto 0; max-width: 1024px; }
.hero-media img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; border-radius: 14px; box-shadow: 0 18px 44px rgba(0, 0, 0, 0.20); }
@media (max-width: 640px) { .hero-media { margin-top: 2rem; } }