*{box-sizing:border-box}
:root{
  --navy:#0b1f33;
  --blue:#173b5f;
  --gold:#f59e0b;
  --gray:#5e6c84;
  --light:#f5f7fa;
  --white:#fff;
  --ink:#1f2933;
  --card:#ffffff;
}
body.dark{
  --light:#0e1724;
  --white:#111c2b;
  --ink:#e8edf5;
  --card:#152235;
}
body{margin:0;font-family:Arial,Helvetica,sans-serif;line-height:1.6;color:var(--ink);background:var(--light)}
a{color:inherit}
.site-header{position:sticky;top:0;background:rgba(11,31,51,.97);z-index:10}
.navbar{max-width:1180px;margin:auto;display:flex;justify-content:space-between;align-items:center;padding:14px 20px;color:white}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:700}
.logo-mark{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border:2px solid var(--gold);border-radius:10px;color:var(--gold)}
.nav-links{display:flex;gap:20px;align-items:center}
.nav-links a{text-decoration:none;font-weight:600;font-size:.95rem}
.nav-cta,.theme-toggle{background:var(--gold);color:var(--navy);padding:9px 14px;border-radius:6px;border:0;font-weight:700;cursor:pointer}
.theme-toggle{background:#ffffff;color:var(--navy)}
.menu-toggle{display:none;background:none;border:0;color:white;font-size:1.8rem}
.hero{background:linear-gradient(135deg,rgba(11,31,51,.96),rgba(23,59,95,.93)),radial-gradient(circle at top left,#355c7d,transparent);color:white;padding:105px 20px;text-align:center}
.hero-content{max-width:950px;margin:auto}
.eyebrow{text-transform:uppercase;letter-spacing:.12em;font-size:.8rem;font-weight:700;color:var(--gold)}
h1{font-size:3.4rem;line-height:1.1;margin:12px 0}
.hero-text{font-size:1.22rem;max-width:850px;margin:0 auto 28px}
.btn{display:inline-block;border:0;text-decoration:none;border-radius:7px;padding:14px 24px;font-weight:700;cursor:pointer}
.primary{background:var(--gold);color:var(--navy)}
.secondary{background:transparent;color:white;border:1px solid rgba(255,255,255,.6);margin-left:10px}
.container{max-width:1120px;margin:auto;padding:0 20px}
.section{padding:70px 0}
.alt{background:var(--white)}
.section-title{text-align:center;max-width:760px;margin:0 auto 30px}
h2{font-size:2.25rem;color:var(--ink);line-height:1.2;margin:8px 0 15px}
.two-col{display:grid;grid-template-columns:1.3fr .9fr;gap:35px;align-items:center}
.highlight-box,.contact-card,.card,.estimate-box{background:var(--card);border-radius:14px;box-shadow:0 8px 25px rgba(0,0,0,.10)}
.highlight-box{padding:28px;border-left:6px solid var(--gold)}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:22px}
.card{padding:25px;transition:.2s transform,.2s box-shadow;cursor:pointer}
.card:hover{transform:translateY(-4px);box-shadow:0 12px 28px rgba(0,0,0,.16)}
.card h3{color:var(--gold);margin-top:0}
.filter-buttons{text-align:center;margin-bottom:25px}
.filter-btn{margin:5px;padding:10px 15px;border-radius:30px;border:1px solid #d0d7de;background:var(--card);color:var(--ink);cursor:pointer;font-weight:700}
.filter-btn.active{background:var(--navy);color:white}
.estimator-card{display:grid;grid-template-columns:.9fr 1.1fr;gap:30px;align-items:center}
.estimate-box{padding:28px}
.estimate-box label{display:block;font-weight:700;margin:12px 0 6px}
.estimate-result{margin-top:15px;padding:18px;border-radius:10px;background:rgba(245,158,11,.14);border:1px solid rgba(245,158,11,.45)}
.stats{display:grid;grid-template-columns:1fr;gap:15px}
.stats div{background:var(--navy);color:white;border-radius:12px;padding:24px;text-align:center}
.stats strong{display:block;font-size:1.6rem;color:var(--gold)}
.stats span{display:block}
.faq{max-width:850px;margin:auto}
.faq-question{width:100%;text-align:left;background:var(--navy);color:white;border:0;margin-top:10px;padding:16px 20px;border-radius:8px;font-weight:700;cursor:pointer}
.faq-answer{display:none;background:var(--card);border-radius:0 0 8px 8px;padding:15px 20px;box-shadow:0 6px 16px rgba(0,0,0,.08)}
.faq-answer.open{display:block}
.contact-section{background:linear-gradient(135deg,#e8eef5,#f8fafc)}
body.dark .contact-section{background:#0e1724}
.contact-card{display:grid;grid-template-columns:.9fr 1.1fr;gap:30px;padding:35px}
input,select,textarea{width:100%;padding:13px;border:1px solid #ccd3dd;border-radius:7px;margin-bottom:12px;font:inherit;background:var(--card);color:var(--ink)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.full{width:100%}
.form-note{font-size:.9rem;color:var(--gray)}
.modal{display:none;position:fixed;z-index:100;inset:0;background:rgba(0,0,0,.68);padding:20px}
.modal.open{display:flex;align-items:center;justify-content:center}
.modal-content{position:relative;background:var(--card);color:var(--ink);max-width:650px;width:100%;border-radius:14px;padding:35px;box-shadow:0 18px 45px rgba(0,0,0,.35)}
.modal-close{position:absolute;right:18px;top:14px;background:none;border:0;font-size:2rem;color:var(--ink);cursor:pointer}
footer{background:var(--navy);color:white;text-align:center;padding:28px 20px}
footer a{color:var(--gold)}
@media(max-width:760px){
  .menu-toggle{display:block}
  .nav-links{display:none;position:absolute;top:66px;left:0;right:0;background:var(--navy);flex-direction:column;padding:20px}
  .nav-links.open{display:flex}
  h1{font-size:2.35rem}
  .two-col,.contact-card,.estimator-card{grid-template-columns:1fr}
  .secondary{margin-left:0;margin-top:10px}
  .form-row{grid-template-columns:1fr}
}