/* TrenchlessSewerPros.site — design system
   Palette sampled from the brand photography: navy uniforms, blue logotype,
   green accent mark, hi-vis safety yellow. */

:root {
  --navy: #15233D;
  --navy-mid: #1B2A4A;
  --blue: #2B6CB0;
  --blue-light: #4A90D9;
  --blue-wash: #EAF1FA;
  --green: #4A9D5B;
  --hi-vis: #D4E84B;
  --ink: #13203A;
  --body: #44506B;
  --muted: #6B7893;
  --line: #DDE3EE;
  --wash: #F4F7FC;
  --white: #fff;
  --radius: 10px;
  --radius-lg: 16px;
  --shadow: 0 1px 2px rgba(19,32,58,.06), 0 8px 24px rgba(19,32,58,.07);
  --shadow-lg: 0 2px 4px rgba(19,32,58,.07), 0 18px 48px rgba(19,32,58,.12);
  --wrap: 1180px;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; font-family: var(--sans); color: var(--body);
  font-size: 17px; line-height: 1.65; background: var(--white);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { color: var(--ink); line-height: 1.2; margin: 0 0 .5em; font-weight: 700; letter-spacing: -.02em; }
h1 { font-size: clamp(2rem, 4.4vw, 3.1rem); }
h2 { font-size: clamp(1.55rem, 3vw, 2.15rem); }
h3 { font-size: 1.2rem; }
p { margin: 0 0 1.1em; }
ul, ol { margin: 0 0 1.2em; padding-left: 1.2em; }
li { margin-bottom: .5em; }
strong { color: var(--ink); font-weight: 650; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }
.narrow { max-width: 760px; }
.section { padding: 72px 0; }
.section--wash { background: var(--wash); }
.section--navy { background: var(--navy); color: #C9D4E8; }
.section--navy h2, .section--navy h3 { color: #fff; }
.eyebrow {
  text-transform: uppercase; letter-spacing: .13em; font-size: .745rem;
  font-weight: 700; color: var(--blue); margin: 0 0 .9em;
}
.section--navy .eyebrow { color: var(--hi-vis); }
.lede { font-size: 1.14rem; color: var(--body); }
.center { text-align: center; }
.center .lede, .center > p { margin-left: auto; margin-right: auto; max-width: 720px; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: .5em; font-weight: 650;
  padding: .82em 1.5em; border-radius: var(--radius); border: 2px solid transparent;
  font-size: 1rem; cursor: pointer; transition: .16s ease; text-decoration: none !important;
}
.btn--primary { background: var(--blue); color: #fff; }
.btn--primary:hover { background: #245c99; transform: translateY(-1px); }
.btn--call { background: var(--hi-vis); color: var(--navy); font-size: 1.06rem; }
.btn--call:hover { background: #c6db3c; transform: translateY(-1px); }
.btn--ghost { border-color: var(--line); color: var(--ink); background: #fff; }
.btn--ghost:hover { border-color: var(--blue); color: var(--blue); }
.section--navy .btn--ghost { border-color: rgba(255,255,255,.3); color: #fff; background: transparent; }
.section--navy .btn--ghost:hover { border-color: #fff; }

/* ---------- header ---------- */
.topbar { background: var(--navy); color: #AFC0DC; font-size: .83rem; }
.topbar .wrap { display: flex; justify-content: space-between; gap: 16px; padding-top: 7px; padding-bottom: 7px; }
.topbar a { color: #fff; font-weight: 600; }
.topbar .dot { color: var(--hi-vis); }

.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.97);
  backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.site-header .wrap { display: flex; align-items: center; gap: 28px; padding-top: 14px; padding-bottom: 14px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; color: var(--navy);
  font-size: 1.08rem; letter-spacing: -.02em; text-decoration: none !important; }
.logo small { display: block; font-size: .66rem; font-weight: 600; color: var(--muted);
  letter-spacing: .07em; text-transform: uppercase; }
.nav { margin-left: auto; display: flex; align-items: center; gap: 26px; }
.nav a { color: var(--ink); font-weight: 600; font-size: .95rem; }
.nav a:hover { color: var(--blue); text-decoration: none; }
.nav-toggle { display: none; background: none; border: 1px solid var(--line);
  border-radius: 8px; padding: 8px 11px; font-size: 1.1rem; }

/* ---------- hero ---------- */
.hero { position: relative; background: var(--navy); color: #C9D4E8; overflow: hidden; }
.hero__media { position: absolute; inset: 0; }
.hero__media img { width: 100%; height: 100%; object-fit: cover; opacity: .34; }
.hero::after { content: ""; position: absolute; inset: 0;
  background: linear-gradient(100deg, var(--navy) 18%, rgba(21,35,61,.86) 52%, rgba(21,35,61,.55) 100%); }
.hero .wrap { position: relative; z-index: 2; padding-top: 84px; padding-bottom: 84px; }
.hero h1 { color: #fff; max-width: 17ch; }
.hero__sub { font-size: 1.17rem; max-width: 56ch; color: #C9D4E8; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 30px; }
.hero__strip { display: flex; flex-wrap: wrap; gap: 30px; margin-top: 42px;
  padding-top: 26px; border-top: 1px solid rgba(255,255,255,.14); }
.hero__strip div { min-width: 132px; }
.hero__strip b { display: block; color: var(--hi-vis); font-size: 1.32rem; letter-spacing: -.02em; }
.hero__strip span { font-size: .87rem; color: #A9BBD8; }

/* page hero (interior) */
.phero { background: linear-gradient(180deg, var(--navy) 0%, var(--navy-mid) 100%); color: #C3D0E6; }
.phero .wrap { padding-top: 56px; padding-bottom: 56px; }
.phero h1 { color: #fff; }
.phero p { max-width: 68ch; margin-bottom: 0; }
.crumbs { font-size: .83rem; color: #93A7C9; margin-bottom: 16px; }
.crumbs a { color: #C3D0E6; }
.crumbs span { opacity: .5; margin: 0 .45em; }

/* ---------- grids / cards ---------- */
.grid { display: grid; gap: 22px; }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

.card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg);
  overflow: hidden; display: flex; flex-direction: column; transition: .18s ease; }
.card:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); border-color: #C6D2E6; }
.card img { aspect-ratio: 3/2; object-fit: cover; width: 100%; }
.card__body { padding: 22px; display: flex; flex-direction: column; flex: 1; }
.card h3 { margin-bottom: .4em; font-size: 1.14rem; }
.card h3 a { color: var(--ink); }
.card h3 a:hover { color: var(--blue); text-decoration: none; }
.card p { font-size: .945rem; margin-bottom: 1em; }
.card__meta { margin-top: auto; font-size: .83rem; color: var(--muted);
  border-top: 1px solid var(--line); padding-top: 13px; }
.card__meta b { color: var(--ink); }
.tag { display: inline-block; font-size: .7rem; font-weight: 700; letter-spacing: .07em;
  text-transform: uppercase; padding: .32em .7em; border-radius: 99px;
  background: var(--blue-wash); color: var(--blue); margin-bottom: .8em; }
.tag--green { background: #E7F4EA; color: #2F7A40; }
.tag--amber { background: #FDF2DC; color: #92670F; }

.feature { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 26px; }
.feature .num { display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; border-radius: 10px; background: var(--navy); color: var(--hi-vis);
  font-weight: 800; font-size: .95rem; margin-bottom: 14px; }
.feature h3 { font-size: 1.07rem; }
.feature p { font-size: .94rem; margin-bottom: 0; }
.section--navy .feature { background: rgba(255,255,255,.05); border-color: rgba(255,255,255,.13); }
.section--navy .feature p { color: #B6C6E0; }

/* ---------- prose ---------- */
.prose { max-width: 760px; }
.prose h2 { margin-top: 2.1em; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { margin-top: 1.7em; }
.prose ul li::marker { color: var(--blue); }
.prose table { width: 100%; border-collapse: collapse; margin: 1.4em 0; font-size: .94rem; }
.prose th, .prose td { text-align: left; padding: 11px 13px; border-bottom: 1px solid var(--line); }
.prose th { background: var(--wash); color: var(--ink); font-weight: 650; }
.callout { background: var(--blue-wash); border-left: 3px solid var(--blue);
  padding: 20px 22px; border-radius: 0 var(--radius) var(--radius) 0; margin: 1.6em 0; }
.callout p:last-child { margin-bottom: 0; }
.callout--warn { background: #FDF6E7; border-left-color: #D99B1C; }

/* ---------- FAQ ---------- */
.faq { border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; padding: 19px 0; font-weight: 650; color: var(--ink);
  font-size: 1.03rem; list-style: none; display: flex; gap: 14px; align-items: flex-start; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before { content: "+"; color: var(--blue); font-weight: 700; font-size: 1.25rem;
  line-height: 1.1; flex-shrink: 0; }
.faq details[open] summary::before { content: "−"; }
.faq .answer { padding: 0 0 19px 28px; }
.faq .answer p:last-child { margin-bottom: 0; }

/* ---------- lists of links ---------- */
.linklist { list-style: none; padding: 0; columns: 3; column-gap: 28px; }
.linklist li { break-inside: avoid; margin-bottom: .55em; font-size: .95rem; }
.chips { display: flex; flex-wrap: wrap; gap: 9px; list-style: none; padding: 0; }
.chips li { margin: 0; }
.chips a { display: inline-block; padding: .46em .9em; border: 1px solid var(--line);
  border-radius: 99px; font-size: .88rem; color: var(--ink); background: #fff; }
.chips a:hover { border-color: var(--blue); color: var(--blue); text-decoration: none; }

/* ---------- CTA band ---------- */
.cta { background: linear-gradient(115deg, var(--navy) 0%, #24406F 100%); color: #C9D4E8; }
.cta .wrap { padding: 54px 20px; display: flex; align-items: center; gap: 36px; flex-wrap: wrap; }
.cta h2 { color: #fff; margin-bottom: .3em; }
.cta p { margin-bottom: 0; max-width: 54ch; }
.cta__actions { margin-left: auto; display: flex; gap: 13px; flex-wrap: wrap; }

/* ---------- contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 42px; align-items: start; }
.field { margin-bottom: 17px; }
.field label { display: block; font-weight: 650; color: var(--ink); font-size: .92rem; margin-bottom: .4em; }
.field input, .field select, .field textarea {
  width: 100%; padding: .78em .9em; border: 1px solid var(--line); border-radius: var(--radius);
  font: inherit; font-size: .97rem; color: var(--ink); background: #fff;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px rgba(43,108,176,.14);
}
.panel { background: var(--wash); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 26px; }
.panel h3 { margin-top: 0; }
.panel dl { margin: 0; }
.panel dt { font-weight: 700; color: var(--ink); font-size: .83rem; text-transform: uppercase;
  letter-spacing: .07em; margin-top: 17px; }
.panel dt:first-child { margin-top: 0; }
.panel dd { margin: .25em 0 0; }
.phone-xl { font-size: 1.55rem; font-weight: 800; color: var(--navy); letter-spacing: -.02em; }

/* ---------- footer ---------- */
.site-footer { background: var(--navy); color: #9FB2D1; font-size: .92rem; padding: 54px 0 26px; }
.site-footer h4 { color: #fff; font-size: .78rem; text-transform: uppercase; letter-spacing: .12em; margin-bottom: 1.1em; }
.site-footer a { color: #C3D0E6; }
.site-footer a:hover { color: #fff; }
.site-footer ul { list-style: none; padding: 0; }
.site-footer li { margin-bottom: .55em; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 36px; }
.footer-bottom { margin-top: 38px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.12);
  display: flex; justify-content: space-between; gap: 18px; flex-wrap: wrap; font-size: .85rem; }
.footer-bottom ul { display: flex; gap: 20px; margin: 0; }
.footer-bottom li { margin: 0; }

.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 12px; top: 12px; z-index: 999; background: #fff; padding: 10px 16px;
  border-radius: 8px; box-shadow: var(--shadow); }

/* ---------- responsive ---------- */
@media (max-width: 960px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .linklist { columns: 2; }
}
@media (max-width: 720px) {
  body { font-size: 16px; }
  .section { padding: 52px 0; }
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .nav { display: none; }
  .nav.open { display: flex; position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; align-items: flex-start; gap: 0; background: #fff;
    border-bottom: 1px solid var(--line); padding: 8px 20px 16px; box-shadow: var(--shadow); }
  .nav.open a { padding: 11px 0; width: 100%; border-bottom: 1px solid var(--line); }
  .nav.open .btn { margin-top: 12px; width: 100%; justify-content: center; border-bottom: none; }
  .nav-toggle { display: block; margin-left: auto; }
  .site-header .wrap { position: relative; }
  .hero .wrap { padding-top: 56px; padding-bottom: 56px; }
  .hero__strip { gap: 20px; }
  .cta__actions { margin-left: 0; }
  .linklist { columns: 1; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .topbar .wrap { font-size: .78rem; }
  .topbar .hide-sm { display: none; }
}