:root{
  --ink:#161a20;
  --ink-soft:#454d58;
  --paper:#ffffff;
  --paper-soft:#f4f5f7;
  --line:#e4e6ea;
  --navy:#1b212c;
  --navy-soft:#242c39;
  --amber:#e0862c;
  --amber-dark:#c56f1c;
  --green:#3e8e5b;
  --radius:10px;
  --shadow:0 8px 24px rgba(20,24,30,.08);
  font-size:16px;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);
  background:var(--paper);
  line-height:1.55;
}
img{max-width:100%;display:block;}
h1,h2,h3{line-height:1.15;margin:0 0 .5em;font-weight:700;}
p{margin:0 0 1em;}
a{color:inherit;text-decoration:none;}

.wrap{max-width:1120px;margin:0 auto;padding:0 24px;}

/* Buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:.8em 1.5em;border-radius:999px;font-weight:600;font-size:.95rem;
  transition:transform .12s ease, background .15s ease, color .15s ease, border-color .15s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--amber);color:#1a1005;}
.btn-primary:hover{background:var(--amber-dark);transform:translateY(-1px);}
.btn-secondary{background:transparent;color:var(--ink);border:1.5px solid var(--line);}
.btn-secondary:hover{border-color:var(--ink-soft);}
.btn-ghost{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.35);}
.btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.08);}

/* Header */
.site-header{
  position:sticky;top:0;z-index:50;
  background:var(--navy);
  border-bottom:2px solid var(--amber);
}
.header-row{display:flex;align-items:center;justify-content:space-between;padding:14px 24px;}
.brand{display:flex;align-items:center;gap:10px;color:#fff;}
.brand-mark{width:34px;height:auto;}
.brand-mark-lg{width:64px;}
.brand-name{font-weight:700;font-size:1.05rem;letter-spacing:.2px;}
.brand-name-light{font-weight:700;opacity:.75;}
.site-nav{display:flex;align-items:center;gap:28px;}
.site-nav a:not(.btn){color:rgba(255,255,255,.82);font-size:.95rem;font-weight:500;}
.site-nav a:not(.btn):hover{color:#fff;}
.nav-toggle{display:none;background:none;border:0;padding:8px;cursor:pointer;}
.nav-toggle span{display:block;width:22px;height:2px;background:#fff;margin:4px 0;border-radius:2px;}

/* Hero */
.hero{background:linear-gradient(160deg,var(--navy) 0%,var(--navy-soft) 100%);color:#fff;padding:72px 0 100px;}
.hero-row{display:flex;align-items:center;}
.hero-copy{width:100%;}
.eyebrow{color:var(--amber);font-weight:700;letter-spacing:.06em;text-transform:uppercase;font-size:.8rem;margin-bottom:14px;}
.hero h1{font-size:clamp(2.2rem,5.4vw,4rem);color:#fff;}
.hero .lede{color:rgba(255,255,255,.78);font-size:1.2rem;max-width:62ch;}
.hero-actions{display:flex;gap:14px;margin-top:28px;flex-wrap:wrap;}
.hero-actions .btn-secondary{color:#fff;border-color:rgba(255,255,255,.4);}
.hero-actions .btn-secondary:hover{border-color:#fff;background:rgba(255,255,255,.08);}

/* Strip */
.strip{background:var(--paper-soft);border-bottom:1px solid var(--line);}
.strip-row{display:flex;flex-wrap:wrap;gap:16px 40px;padding:22px 24px;font-size:.95rem;color:var(--ink-soft);}
.strip-row strong{color:var(--ink);}

/* Sections generic */
section{padding:80px 0;}
.section-lede{color:var(--ink-soft);font-size:1.05rem;max-width:62ch;}
h2{font-size:clamp(1.6rem,3vw,2.1rem);}

/* Leaks (before/after comparison) */
.leaks{background:var(--paper-soft);}
.leaks-grid{margin-top:32px;border-top:1px solid var(--line);}
.leaks-row{display:grid;grid-template-columns:1fr 1fr;gap:24px;padding:18px 0;border-bottom:1px solid var(--line);}
.leaks-row .without{color:var(--ink-soft);font-size:.95rem;margin:0;}
.leaks-row .without::before{content:"✕ ";color:#b14f32;font-weight:700;}
.leaks-row .with{color:var(--ink);font-size:.95rem;margin:0;font-weight:500;}
.leaks-row .with::before{content:"✓ ";color:var(--green);font-weight:700;}

/* Features */
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:40px;}
.feature-card{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;box-shadow:var(--shadow);
}
.feature-card h3{font-size:1.05rem;margin-bottom:.4em;}
.feature-card p{color:var(--ink-soft);font-size:.95rem;margin:0;}
.feature-card-wide{grid-column:span 2;}

/* How it works */
.how{background:var(--paper-soft);}
.steps{list-style:none;margin:40px 0 0;padding:0;display:grid;gap:28px;}
.steps li{display:flex;gap:20px;align-items:flex-start;}
.step-num{
  flex:none;width:40px;height:40px;border-radius:50%;
  background:var(--navy);color:var(--amber);font-weight:700;
  display:flex;align-items:center;justify-content:center;font-size:1.05rem;
}
.steps h3{font-size:1.05rem;margin-bottom:.3em;}
.steps p{color:var(--ink-soft);margin:0;max-width:60ch;}

/* Trust */
.trust{background:var(--navy);color:#fff;}
.trust .eyebrow{margin-bottom:10px;}
.trust h2{color:#fff;margin-bottom:36px;}
.trust-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(13rem,1fr));gap:28px;}
.trust-num{display:block;font-weight:700;color:var(--amber);font-size:.8rem;letter-spacing:.08em;text-transform:uppercase;margin-bottom:8px;}
.trust-item p{color:rgba(255,255,255,.75);font-size:.95rem;margin:0;}

/* Contact */
.contact-row{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;}

/* Footer */
.site-footer{background:var(--navy);color:rgba(255,255,255,.7);padding:28px 0;}
.footer-row{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:.9rem;}
.brand-footer{color:#fff;}
.brand-mark-sm{width:22px;}
.footer-row a:hover{color:#fff;}

/* Responsive */
@media (max-width:860px){
  .feature-grid{grid-template-columns:repeat(2,1fr);}
}

@media (max-width:640px){
  .feature-grid{grid-template-columns:1fr;}
  .feature-card-wide{grid-column:auto;}
  .leaks-row{grid-template-columns:1fr;gap:6px;}
  .nav-toggle{display:block;}
  .site-nav{
    position:absolute;top:100%;left:0;right:0;
    background:var(--navy);flex-direction:column;align-items:flex-start;
    gap:0;padding:0 24px;max-height:0;overflow:hidden;
    transition:max-height .25s ease;
    border-bottom:1px solid rgba(255,255,255,.08);
  }
  .site-nav.open{max-height:320px;padding:12px 24px 20px;}
  .site-nav a:not(.btn){padding:10px 0;width:100%;}
  .site-nav .btn{margin-top:10px;}
  .contact-row{flex-direction:column;align-items:flex-start;}
}