/* PlumbLinker — design system
   Single stylesheet. No external fonts, no external requests. */

:root{
  --ink:#0B1B2B;
  --navy:#0A2540;
  --navy-2:#123A5E;
  --slate:#42566B;
  --muted:#6B7C8F;
  --line:#DCE3EA;
  --line-soft:#EDF1F5;
  --bg:#FFFFFF;
  --soft:#F4F7FA;
  --soft-2:#EAF0F6;
  --accent:#0E7C86;
  --accent-dark:#0A5F67;
  --cta:#D9480F;
  --cta-dark:#AE380B;
  --ok:#087443;
  --warn:#B54708;
  --radius:10px;
  --radius-lg:16px;
  --shadow-sm:0 1px 2px rgba(11,27,43,.06),0 1px 3px rgba(11,27,43,.08);
  --shadow-md:0 4px 6px -1px rgba(11,27,43,.08),0 10px 20px -8px rgba(11,27,43,.14);
  --shadow-lg:0 12px 32px -8px rgba(11,27,43,.18);
  --maxw:1120px;
  --prose:70ch;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,"Helvetica Neue",Arial,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}
}
body{
  margin:0;
  font-family:var(--sans);
  font-size:17px;
  line-height:1.65;
  color:var(--slate);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;height:auto;display:block}
h1,h2,h3,h4{color:var(--ink);line-height:1.2;margin:0 0 .5em;letter-spacing:-.02em;font-weight:700}
h1{font-size:clamp(2rem,1.35rem + 2.7vw,3.15rem);letter-spacing:-.03em}
h2{font-size:clamp(1.5rem,1.2rem + 1.3vw,2.1rem);margin-top:0}
h3{font-size:clamp(1.15rem,1.05rem + .45vw,1.35rem)}
h4{font-size:1.02rem}
p{margin:0 0 1.1em}
a{color:var(--accent-dark);text-decoration:underline;text-underline-offset:2px;text-decoration-thickness:1px}
a:hover{color:var(--cta)}
strong{color:var(--ink);font-weight:650}
hr{border:0;border-top:1px solid var(--line);margin:2.5rem 0}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px;border-radius:4px}

.skip{position:absolute;left:-9999px;top:0;background:var(--navy);color:#fff;padding:.75rem 1.25rem;z-index:200;border-radius:0 0 var(--radius) 0}
.skip:focus{left:0}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.prose{max-width:var(--prose)}
.prose ul,.prose ol{margin:0 0 1.3em;padding-left:1.3em}
.prose li{margin-bottom:.5em}
.prose h2{margin-top:2.4em}
.prose h3{margin-top:1.9em}
.prose h2:first-child,.prose h3:first-child{margin-top:0}

/* ---------- header ---------- */
.hdr{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.94);
  backdrop-filter:saturate(180%) blur(10px);
  -webkit-backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid var(--line);
}
.hdr-in{display:flex;align-items:center;gap:1.5rem;height:68px}
.brand{display:flex;align-items:center;gap:.55rem;font-weight:750;font-size:1.14rem;color:var(--ink);text-decoration:none;letter-spacing:-.025em;flex-shrink:0}
.brand:hover{color:var(--ink)}
.brand svg{flex-shrink:0}
.brand .b2{color:var(--accent)}
.nav{display:flex;gap:1.55rem;margin-left:auto;align-items:center}
.nav a{color:var(--slate);text-decoration:none;font-size:.95rem;font-weight:550;white-space:nowrap}
.nav a:hover{color:var(--accent-dark)}
.hdr .btn-call{flex-shrink:0}
@media (max-width:900px){.nav{display:none}.hdr-in{height:60px}}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.55rem;
  font-family:inherit;font-weight:700;font-size:1.02rem;line-height:1.1;
  padding:.95rem 1.6rem;border-radius:var(--radius);border:1px solid transparent;
  text-decoration:none;cursor:pointer;transition:background .15s ease,transform .08s ease,box-shadow .15s ease;
}
.btn:active{transform:translateY(1px)}
.btn-call{background:var(--cta);color:#fff;box-shadow:var(--shadow-sm)}
.btn-call:hover{background:var(--cta-dark);color:#fff}
.btn-call.sm{padding:.62rem 1.05rem;font-size:.94rem}
.btn-lg{font-size:1.22rem;padding:1.15rem 2.1rem}
.btn-ghost{background:#fff;color:var(--navy);border-color:var(--line);box-shadow:var(--shadow-sm)}
.btn-ghost:hover{background:var(--soft);color:var(--navy);border-color:#C6D2DE}
.btn-onnavy{background:#fff;color:var(--navy)}
.btn-onnavy:hover{background:var(--soft);color:var(--navy)}

/* ---------- hero ---------- */
.hero{background:linear-gradient(168deg,#0A2540 0%,#123A5E 62%,#164668 100%);color:#DCE7F2;padding:4.6rem 0 4.2rem;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;background:radial-gradient(900px 420px at 82% 4%,rgba(14,124,134,.30),transparent 62%);pointer-events:none}
.hero .wrap{position:relative;z-index:1}
.hero h1{color:#fff;max-width:20ch}
.hero.narrow h1{max-width:24ch}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:3.5rem;align-items:center}
@media (max-width:980px){.hero-grid{grid-template-columns:1fr;gap:2.4rem}}
.hero-aside{
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.16);
  border-radius:var(--radius-lg);padding:1.7rem 1.6rem;backdrop-filter:blur(6px);
}
.hero-aside h2{color:#fff;font-size:1.06rem;margin-bottom:1.1rem;letter-spacing:-.01em}
.hero-aside ol{list-style:none;margin:0;padding:0;counter-reset:ha}
.hero-aside li{position:relative;padding-left:2.5rem;margin-bottom:1.05rem;font-size:.96rem;line-height:1.55;color:#C9DCEC}
.hero-aside li:last-child{margin-bottom:0}
.hero-aside li::before{
  counter-increment:ha;content:counter(ha);position:absolute;left:0;top:-1px;
  width:26px;height:26px;border-radius:50%;background:rgba(95,198,208,.16);
  border:1px solid rgba(95,198,208,.45);color:#7FD3DB;font-weight:700;font-size:.82rem;
  display:flex;align-items:center;justify-content:center;
}
.hero-aside strong{color:#fff;display:block;font-weight:650;margin-bottom:.1rem}
.hero-aside .fine{margin:1.3rem 0 0;padding-top:1.1rem;border-top:1px solid rgba(255,255,255,.14);font-size:.85rem;color:#93AEC8}
.hero .lede{font-size:clamp(1.08rem,1rem + .45vw,1.28rem);max-width:56ch;color:#C4D6E8;margin-bottom:2rem}
.hero-cta{display:flex;flex-wrap:wrap;gap:.85rem;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:.5rem;font-size:.79rem;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:#7FD3DB;margin-bottom:1.05rem}
.dot{width:8px;height:8px;border-radius:50%;background:#31D07F;box-shadow:0 0 0 4px rgba(49,208,127,.22);flex-shrink:0}
.hero-note{margin-top:1.3rem;font-size:.9rem;color:#9DB4CA;max-width:52ch}
.hero-note a{color:#BBD3E8}
@media (max-width:640px){.hero{padding:3rem 0 2.8rem}.hero-cta .btn{width:100%}}

/* ---------- sections ---------- */
.sec{padding:4.2rem 0}
.sec-sm{padding:3rem 0}
.sec-soft{background:var(--soft);border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft)}
.sec-head{max-width:62ch;margin-bottom:2.4rem}
.sec-head p{font-size:1.06rem;margin-bottom:0}
.center{text-align:center}
.center .sec-head{margin-left:auto;margin-right:auto}

/* ---------- trust strip ---------- */
.strip{background:var(--navy);color:#B9CDE0;padding:.9rem 0;font-size:.92rem;border-bottom:1px solid rgba(255,255,255,.09)}
.strip ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:.6rem 2.1rem;justify-content:center}
.strip li{display:flex;align-items:center;gap:.5rem}
.strip svg{flex-shrink:0;opacity:.85}

/* ---------- grid + cards ---------- */
.grid{display:grid;gap:1.35rem}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
@media (max-width:920px){.g3,.g4{grid-template-columns:repeat(2,1fr)}}
@media (max-width:600px){.g2,.g3,.g4{grid-template-columns:1fr}}

.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:1.6rem;box-shadow:var(--shadow-sm);transition:box-shadow .18s ease,border-color .18s ease,transform .18s ease}
.card h3{margin-bottom:.45rem;font-size:1.09rem}
.card p{font-size:.96rem;margin-bottom:0;color:var(--slate)}
.card p + .card-link{margin-top:.9rem}
a.card{display:block;text-decoration:none;color:inherit}
a.card:hover{box-shadow:var(--shadow-md);border-color:#BFD0DE;transform:translateY(-2px);color:inherit}
.card-link{display:inline-flex;align-items:center;gap:.35rem;color:var(--accent-dark);font-weight:650;font-size:.94rem;margin-top:.9rem}
a.card:hover .card-link{color:var(--cta)}
.card-ico{width:40px;height:40px;border-radius:9px;background:var(--soft-2);display:flex;align-items:center;justify-content:center;margin-bottom:1rem;color:var(--accent-dark)}

/* ---------- numbered steps ---------- */
.steps{counter-reset:s;display:grid;gap:1.35rem;grid-template-columns:repeat(3,1fr)}
@media (max-width:820px){.steps{grid-template-columns:1fr}}
.step{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:1.7rem 1.6rem 1.6rem;box-shadow:var(--shadow-sm)}
.step::before{
  counter-increment:s;content:counter(s);
  position:absolute;top:-17px;left:1.6rem;
  width:34px;height:34px;border-radius:50%;
  background:var(--cta);color:#fff;font-weight:750;font-size:1rem;
  display:flex;align-items:center;justify-content:center;box-shadow:0 2px 8px rgba(217,72,15,.32);
}
.step h3{margin-top:.55rem;font-size:1.07rem}
.step p{font-size:.96rem;margin-bottom:0}

/* ---------- symptom / urgent list ---------- */
.symp{list-style:none;margin:0;padding:0;display:grid;gap:.7rem;grid-template-columns:repeat(2,1fr)}
@media (max-width:640px){.symp{grid-template-columns:1fr}}
.symp li{display:flex;gap:.7rem;align-items:flex-start;background:#fff;border:1px solid var(--line);border-left:3px solid var(--cta);border-radius:8px;padding:.85rem 1rem;font-size:.97rem}
.symp li svg{flex-shrink:0;margin-top:3px;color:var(--cta)}

.checks{list-style:none;margin:0 0 1.3em;padding:0}
.checks li{display:flex;gap:.65rem;align-items:flex-start;margin-bottom:.6rem}
.checks li svg{flex-shrink:0;margin-top:5px;color:var(--ok)}

/* ---------- callout ---------- */
.note{background:var(--soft);border:1px solid var(--line);border-left:4px solid var(--accent);border-radius:8px;padding:1.15rem 1.3rem;margin:1.8rem 0}
.note p:last-child{margin-bottom:0}
.note strong{display:block;margin-bottom:.3rem;color:var(--ink)}
.note.warn{border-left-color:var(--cta);background:#FEF6F2;border-color:#F6DED2}

/* ---------- table ---------- */
.tbl-wrap{overflow-x:auto;margin:1.6rem 0;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm)}
table{border-collapse:collapse;width:100%;font-size:.96rem;background:#fff}
th,td{text-align:left;padding:.82rem 1.05rem;border-bottom:1px solid var(--line-soft)}
th{background:var(--soft);color:var(--ink);font-weight:700;font-size:.87rem;letter-spacing:.02em;white-space:nowrap}
tbody tr:last-child td{border-bottom:0}
tbody tr:hover{background:#FBFDFF}

/* ---------- FAQ ---------- */
.faq{max-width:var(--prose);margin:0}
.faq details{border:1px solid var(--line);border-radius:var(--radius);margin-bottom:.7rem;background:#fff;box-shadow:var(--shadow-sm);overflow:hidden}
.faq details[open]{border-color:#C3D3E1}
.faq summary{
  cursor:pointer;padding:1.05rem 3rem 1.05rem 1.25rem;font-weight:650;color:var(--ink);
  list-style:none;position:relative;font-size:1.01rem;line-height:1.45;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"";position:absolute;right:1.25rem;top:1.4rem;
  width:9px;height:9px;border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);
  transform:rotate(45deg);transition:transform .18s ease;
}
.faq details[open] summary::after{transform:rotate(-135deg);top:1.55rem}
.faq summary:hover{background:var(--soft)}
.faq .ans{padding:0 1.25rem 1.15rem;font-size:.99rem}
.faq .ans p:last-child{margin-bottom:0}

/* ---------- CTA band ---------- */
.band{background:linear-gradient(150deg,#0A2540,#134264);color:#C9DAEA;padding:3.5rem 0;text-align:center}
.band h2{color:#fff;max-width:22ch;margin-left:auto;margin-right:auto}
.band p{max-width:52ch;margin:0 auto 1.9rem;font-size:1.06rem}
.band .btn-call{box-shadow:0 4px 16px rgba(217,72,15,.4)}
.band-fine{margin-top:1.3rem;font-size:.87rem;color:#8FA9C2}

/* ---------- breadcrumbs ---------- */
.crumbs{font-size:.88rem;color:var(--muted);padding:1rem 0 0}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:.45rem;margin:0;padding:0}
.crumbs li::after{content:"/";margin-left:.45rem;color:#B9C6D3}
.crumbs li:last-child::after{content:""}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--accent-dark);text-decoration:underline}

/* ---------- post meta / list ---------- */
.meta{font-size:.9rem;color:var(--muted);margin-bottom:1.6rem}
.post-list{list-style:none;margin:0;padding:0}
.post-list li{border-bottom:1px solid var(--line);padding:1.5rem 0}
.post-list li:first-child{padding-top:0}
.post-list h3{margin-bottom:.35rem}
.post-list a{text-decoration:none}
.post-list a:hover h3{color:var(--accent-dark)}
.post-list p{font-size:.97rem;margin-bottom:.4rem}

/* ---------- related links ---------- */
.rel{display:flex;flex-wrap:wrap;gap:.6rem;margin-top:1rem}
.rel a{background:var(--soft);border:1px solid var(--line);border-radius:100px;padding:.45rem 1rem;font-size:.92rem;text-decoration:none;color:var(--navy-2);font-weight:550}
.rel a:hover{background:var(--soft-2);border-color:#C6D2DE;color:var(--accent-dark)}

/* ---------- footer ---------- */
.ftr{background:var(--navy);color:#93AAC1;padding:3.4rem 0 2rem;font-size:.93rem;margin-bottom:0}
.ftr-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:2.2rem;margin-bottom:2.6rem}
@media (max-width:820px){.ftr-grid{grid-template-columns:1fr 1fr}}
@media (max-width:520px){.ftr-grid{grid-template-columns:1fr}}
.ftr h4{color:#fff;font-size:.83rem;letter-spacing:.09em;text-transform:uppercase;margin-bottom:1rem;font-weight:700}
.ftr ul{list-style:none;margin:0;padding:0}
.ftr li{margin-bottom:.58rem}
.ftr a{color:#B4C8DB;text-decoration:none}
.ftr a:hover{color:#fff;text-decoration:underline}
.ftr .brand{color:#fff;margin-bottom:.9rem}
.ftr .brand .b2{color:#5FC6D0}
.ftr-about{max-width:34ch;font-size:.92rem;line-height:1.6;color:#93AAC1}
.ftr-bot{border-top:1px solid rgba(255,255,255,.12);padding-top:1.6rem;font-size:.85rem;color:#7E96AE;line-height:1.6}
.ftr-bot p{margin-bottom:.7rem}
.ftr-bot p:last-child{margin-bottom:0}
.ftr-phone{color:#fff;font-weight:700;font-size:1.12rem;text-decoration:none;display:inline-block;margin-bottom:.4rem}
.ftr-phone:hover{color:#fff}

/* ---------- mobile sticky call bar ---------- */
.mbar{display:none}
@media (max-width:900px){
  .mbar{
    display:block;position:fixed;left:0;right:0;bottom:0;z-index:110;
    background:rgba(255,255,255,.97);backdrop-filter:blur(10px);
    border-top:1px solid var(--line);padding:.6rem 14px calc(.6rem + env(safe-area-inset-bottom));
    box-shadow:0 -3px 14px rgba(11,27,43,.09);
  }
  .mbar .btn{width:100%;font-size:1.09rem;padding:1rem}
  body{padding-bottom:80px}
  .ftr{margin-bottom:0}
}

/* ---------- utilities ---------- */
.mt0{margin-top:0}.mb0{margin-bottom:0}
.lead{font-size:1.1rem;color:var(--slate)}
.small{font-size:.9rem}
.muted{color:var(--muted)}
.disclosure{background:var(--soft);border:1px solid var(--line);border-radius:8px;padding:1rem 1.15rem;font-size:.9rem;color:var(--slate);margin:1.8rem 0}
.disclosure p:last-child{margin-bottom:0}