/* ============================================================
   BAS CONSTRUCTION — brand stylesheet
   Palette drawn from the company mark: signal blue + skyline grey,
   with a copper accent for calls to action (a nod to live wiring).
   Type: Sora (display) / Inter (body) / IBM Plex Mono (data, labels).
   Signature motif: the "circuit rail" — a wired, node-based line
   that stands in for the London skyline in the logo and for the
   idea of a live circuit / coverage network.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Sora:wght@400;500;600;700;800&family=Inter:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root{
  /* brand */
  --navy:#0B1533;
  --navy-2:#101E45;
  --blue:#2B4B9E;
  --blue-mid:#3E62C4;
  --blue-bright:#5B7EE0;
  --slate:#5B6472;
  --slate-dim:#88909B;
  --copper:#BE7A3D;
  --copper-bright:#D68F4E;

  /* neutrals */
  --white:#FFFFFF;
  --porcelain:#F6F7F9;
  --porcelain-dim:#EDEFF3;
  --line:#E1E4EA;
  --ink:#12151C;
  --text-dark:#1B2030;
  --text-mute:#5B6472;
  --text-on-dark:#F3F5F9;
  --text-on-dark-mute:#B7C0D6;

  /* type */
  --display:'Sora', system-ui, sans-serif;
  --body:'Inter', system-ui, sans-serif;
  --mono:'IBM Plex Mono', 'SFMono-Regular', monospace;

  --radius:10px;
  --shadow-sm: 0 1px 2px rgba(11,21,51,.06);
  --shadow-md: 0 8px 28px rgba(11,21,51,.10);
  --shadow-lg: 0 20px 60px rgba(11,21,51,.16);
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *,*::before,*::after{ animation-duration:0.001ms !important; animation-iteration-count:1 !important; transition-duration:0.001ms !important; scroll-behavior:auto !important; }
}

body{
  margin:0;
  font-family:var(--body);
  color:var(--text-dark);
  background:var(--white);
  -webkit-font-smoothing:antialiased;
  line-height:1.55;
}

h1,h2,h3,h4{
  font-family:var(--display);
  color:var(--text-dark);
  line-height:1.15;
  margin:0 0 .5em;
  letter-spacing:-0.01em;
}
h1{ font-weight:800; }
h2{ font-weight:700; font-size:clamp(24px,3vw,34px); }
h3{ font-weight:600; font-size:19px; }
p{ margin:0 0 1em; }
a{ color:inherit; text-decoration:none; }
ul{ margin:0 0 1em; padding-left:1.25em; }
img{ max-width:100%; display:block; }

.wrap{ max-width:1180px; margin:0 auto; padding:0 24px; }

.skip-link{
  position:absolute; left:-999px; top:0; background:var(--navy); color:#fff;
  padding:12px 18px; z-index:200; font-family:var(--mono); font-size:13px;
}
.skip-link:focus{ left:12px; top:12px; border-radius:6px; }

:focus-visible{ outline:3px solid var(--copper-bright); outline-offset:2px; }

.eyebrow{
  font-family:var(--mono); font-size:12.5px; letter-spacing:.14em; text-transform:uppercase;
  color:var(--copper-bright); font-weight:600;
}

/* ---------------- header / nav ---------------- */
.site-header{
  position:sticky; top:0; z-index:100;
  background:rgba(11,21,51,.94);
  backdrop-filter:blur(10px);
  border-bottom:1px solid rgba(255,255,255,.08);
}
.nav{ max-width:1180px; margin:0 auto; padding:0 24px; display:flex; align-items:center; justify-content:space-between; height:76px; gap:24px; }
.logo{ display:flex; align-items:center; gap:10px; }
.logo img{ height:34px; width:auto; filter:brightness(0) invert(1); }
.logo small{ display:none; }

.nav-links{ list-style:none; display:flex; gap:28px; margin:0; padding:0; }
.nav-links a{
  color:var(--text-on-dark-mute); font-family:var(--body); font-weight:500; font-size:14.5px;
  padding:6px 2px; border-bottom:2px solid transparent; transition:color .15s,border-color .15s;
}
.nav-links a:hover, .nav-links a:focus-visible{ color:#fff; border-bottom-color:var(--copper-bright); }

.nav-cta{ display:flex; align-items:center; gap:14px; }
.nav-phone{ font-family:var(--mono); font-size:14px; color:#fff; letter-spacing:.02em; }
.nav-phone:hover{ color:var(--copper-bright); }
.nav-toggle{ display:none; background:none; border:1px solid rgba(255,255,255,.25); color:#fff; width:42px; height:38px; border-radius:8px; font-size:18px; cursor:pointer; }

@media (max-width:920px){
  .nav-links{
    position:fixed; inset:76px 0 auto 0; background:var(--navy); flex-direction:column; gap:0;
    padding:8px 24px 20px; transform:translateY(-8px); opacity:0; pointer-events:none; transition:opacity .18s, transform .18s;
    border-bottom:1px solid rgba(255,255,255,.08);
  }
  .nav-links.open{ opacity:1; transform:translateY(0); pointer-events:auto; }
  .nav-links li{ border-top:1px solid rgba(255,255,255,.08); }
  .nav-links a{ display:block; padding:14px 2px; }
  .nav-phone{ display:none; }
  .nav-toggle{ display:block; }
}

/* ---------------- buttons ---------------- */
.btn{
  display:inline-flex; align-items:center; gap:8px; font-family:var(--body); font-weight:600; font-size:14.5px;
  padding:13px 24px; border-radius:8px; border:1px solid transparent; cursor:pointer; transition:transform .12s,box-shadow .12s,background .15s;
}
.btn:hover{ transform:translateY(-1px); }
.btn-copper{ background:var(--copper); color:#fff; box-shadow:var(--shadow-sm); }
.btn-copper:hover{ background:var(--copper-bright); box-shadow:var(--shadow-md); color:#fff; }
.btn-outline{ border-color:var(--line); color:var(--text-dark); background:#fff; }
.btn-outline:hover{ border-color:var(--blue); color:var(--blue); }
.btn-outline-dark{ border-color:rgba(255,255,255,.35); color:#fff; }
.btn-outline-dark:hover{ border-color:#fff; background:rgba(255,255,255,.08); }

/* ---------------- hero ---------------- */
.hero{
  background:
    radial-gradient(1100px 480px at 85% -10%, rgba(62,98,196,.35), transparent 60%),
    linear-gradient(180deg,var(--navy) 0%,var(--navy-2) 100%);
  position:relative; overflow:hidden;
  padding:76px 0 84px;
}
.hero::after{
  content:""; position:absolute; left:0; right:0; bottom:0; height:120px;
  background:url("../images/logo/bas-logo.png") no-repeat center bottom / auto 100%;
  opacity:.05; filter:brightness(0) invert(1); pointer-events:none;
}
.hero-grid{ display:grid; grid-template-columns:1.15fr .85fr; gap:56px; align-items:center; position:relative; z-index:1; }
.hero h1{ color:#fff; font-size:clamp(32px,4.6vw,52px); max-width:15ch; margin-top:14px; }
.hero h1 em{ font-style:normal; color:var(--copper-bright); }
.hero-lead{ color:var(--text-on-dark-mute); font-size:17px; max-width:52ch; margin-top:16px; }
.hero-actions{ display:flex; gap:14px; margin-top:28px; flex-wrap:wrap; }

.badge-row{ display:flex; flex-wrap:wrap; gap:10px; margin-top:30px; }
.badge{
  font-family:var(--mono); font-size:12px; letter-spacing:.03em; color:var(--text-on-dark-mute);
  border:1px solid rgba(255,255,255,.22); padding:7px 12px; border-radius:100px;
}

.hero-panel{
  background:rgba(255,255,255,.06); border:1px solid rgba(255,255,255,.14); border-radius:14px;
  padding:26px 28px; backdrop-filter:blur(6px);
}
.hero-panel-title{ font-family:var(--mono); font-size:12px; letter-spacing:.1em; text-transform:uppercase; color:var(--copper-bright); margin-bottom:14px; }
.spec-row{ display:flex; justify-content:space-between; padding:11px 0; border-top:1px solid rgba(255,255,255,.12); font-size:14.5px; }
.spec-row:first-of-type{ border-top:none; }
.spec-row span:first-child{ color:var(--text-on-dark-mute); }
.spec-row span:last-child{ color:#fff; font-weight:600; text-align:right; }

.breadcrumb{ font-family:var(--mono); font-size:12.5px; color:var(--text-on-dark-mute); padding-top:6px; }
.breadcrumb a{ color:var(--text-on-dark-mute); }
.breadcrumb a:hover{ color:#fff; }

/* ---------------- sections ---------------- */
section{ padding:76px 0; }
.section-dim{ background:var(--porcelain); }
.section-dark{ background:var(--navy); }
.section-dark h2, .section-dark .eyebrow + h2{ color:#fff; }
.section-dark p{ color:var(--text-on-dark-mute); }

.section-head{ max-width:640px; margin-bottom:40px; }
.section-head p{ color:var(--text-mute); font-size:16px; }

/* circuit rail — numbered / node-based content blocks */
.circuit-rail{ position:relative; display:flex; flex-direction:column; gap:52px; }
.circuit-rail::before{
  content:""; position:absolute; left:11px; top:8px; bottom:8px; width:2px;
  background:repeating-linear-gradient(180deg,var(--line) 0 6px,transparent 6px 12px);
}
.rail-node{ position:relative; padding-left:44px; }
.rail-node::before{
  content:attr(data-n); position:absolute; left:0; top:0; width:24px; height:24px; border-radius:50%;
  background:var(--white); border:2px solid var(--blue); color:var(--blue); font-family:var(--mono); font-size:11px;
  display:flex; align-items:center; justify-content:center; font-weight:600;
}
.rail-node:not([data-n])::before{ display:none; }
.rail-node:not([data-n]){ padding-left:0; }

.rail-node h2{ margin-top:2px; }

/* grids / cards */
.grid{ display:grid; gap:22px; }
.grid-3{ grid-template-columns:repeat(3,1fr); }
.grid-4{ grid-template-columns:repeat(4,1fr); }
@media (max-width:900px){ .grid-3{ grid-template-columns:1fr 1fr; } .grid-4{ grid-template-columns:1fr 1fr; } }
@media (max-width:600px){ .grid-3,.grid-4{ grid-template-columns:1fr; } }

.card{
  background:#fff; border:1px solid var(--line); border-radius:var(--radius); padding:26px 24px;
  transition:box-shadow .15s, border-color .15s, transform .15s;
}
.card:hover{ box-shadow:var(--shadow-md); border-color:transparent; transform:translateY(-2px); }
.card .icon{ width:30px; height:30px; color:var(--blue); margin-bottom:14px; }
.card h3{ margin-bottom:8px; }
.card p{ color:var(--text-mute); font-size:14.5px; margin-bottom:10px; }
.card-link{ font-family:var(--mono); font-size:13px; color:var(--blue); font-weight:600; }
.card-link:hover{ color:var(--copper); }

/* accreditation strip */
.cert-strip{ display:grid; grid-template-columns:repeat(3,1fr); gap:16px; margin-top:22px; }
@media (max-width:900px){ .cert-strip{ grid-template-columns:1fr 1fr; } }
@media (max-width:560px){ .cert-strip{ grid-template-columns:1fr; } }
.cert-chip{
  display:flex; align-items:center; gap:12px; background:#fff; border:1px solid var(--line);
  border-radius:var(--radius); padding:14px 16px;
}
.cert-chip .dot{ width:9px; height:9px; border-radius:50%; background:var(--copper); flex:none; }
.cert-chip strong{ display:block; font-size:14px; }
.cert-chip span{ display:block; font-size:12.5px; color:var(--text-mute); }

.accred-logos{ display:flex; flex-wrap:wrap; align-items:center; gap:28px; margin-top:26px; }
.accred-logos img{ max-height:52px; width:auto; }
.accred-mark{
  display:flex; align-items:center; gap:10px; font-family:var(--mono); font-size:12.5px; color:var(--text-mute);
  border:1px solid var(--line); border-radius:8px; padding:10px 14px; background:#fff;
}
.accred-mark .accred-icon{ width:30px; height:30px; flex:none; }

/* area grid */
.area-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:18px; }
@media (max-width:900px){ .area-grid{ grid-template-columns:1fr 1fr; } }
@media (max-width:600px){ .area-grid{ grid-template-columns:1fr; } }
.area-card{ background:#fff; border:1px solid var(--line); border-radius:var(--radius); padding:22px; position:relative; }
.area-card::before{ content:""; position:absolute; left:0; top:22px; bottom:22px; width:3px; background:var(--copper); border-radius:0 3px 3px 0; }
.area-card h3{ margin-bottom:4px; }
.postcode{ font-family:var(--mono); font-size:12px; color:var(--blue); letter-spacing:.04em; }
.area-card p{ color:var(--text-mute); font-size:14px; margin-top:10px; margin-bottom:0; }

/* photos */
.photo{ aspect-ratio:4/3; border-radius:var(--radius); overflow:hidden; background:var(--porcelain-dim); position:relative; }
.photo img{ width:100%; height:100%; object-fit:cover; }
.photo-fallback{
  position:absolute; inset:0; display:flex; flex-direction:column; align-items:center; justify-content:center; gap:10px;
  color:var(--slate-dim); font-family:var(--mono); font-size:12px; text-align:center; background:
  repeating-linear-gradient(135deg,var(--porcelain-dim) 0 14px, var(--porcelain) 14px 28px);
}
.photo-fallback svg{ width:30px; height:30px; }

/* CTA band */
.cta-band{
  background:var(--navy); color:#fff; border-radius:16px; padding:40px 44px;
  display:flex; align-items:center; justify-content:space-between; gap:24px; flex-wrap:wrap;
}
.cta-band h3{ color:#fff; margin-bottom:6px; }
.cta-band p{ color:var(--text-on-dark-mute); margin:0; }

/* blog / post */
.post-card{ background:#fff; border:1px solid var(--line); border-radius:var(--radius); padding:26px 28px; }
.post-meta{ display:flex; gap:14px; font-family:var(--mono); font-size:12px; color:var(--text-mute); margin-bottom:10px; }
.post-body h2{ margin-top:1.6em; }
.post-body p, .post-body li{ color:var(--text-dark); font-size:16px; }
.post-body ul{ color:var(--text-dark); }
.quote-block{
  border-left:3px solid var(--copper); padding:6px 0 6px 22px; margin:28px 0; font-family:var(--display);
  font-size:19px; font-style:italic; color:var(--text-dark);
}
.quote-cite{ display:block; margin-top:8px; font-family:var(--mono); font-style:normal; font-size:12.5px; color:var(--text-mute); }
.tag-list{ display:flex; gap:8px; flex-wrap:wrap; margin-top:30px; }
.tag{ font-family:var(--mono); font-size:12px; border:1px solid var(--line); border-radius:100px; padding:5px 12px; color:var(--text-mute); }

/* form */
.form-grid{ display:grid; grid-template-columns:1fr 1fr; gap:18px 20px; }
.field-full{ grid-column:1 / -1; }
@media (max-width:640px){ .form-grid{ grid-template-columns:1fr; } }
.field label{ display:block; font-family:var(--mono); font-size:12.5px; color:var(--text-mute); margin-bottom:7px; letter-spacing:.02em; }
.field input, .field select, .field textarea{
  width:100%; border:1px solid var(--line); border-radius:8px; padding:12px 14px; font-family:var(--body);
  font-size:15px; color:var(--text-dark); background:#fff; transition:border-color .15s, box-shadow .15s;
}
.field input:focus, .field select:focus, .field textarea:focus{ border-color:var(--blue); box-shadow:0 0 0 3px rgba(43,75,158,.14); outline:none; }
textarea{ resize:vertical; }

/* footer */
.site-footer{ background:var(--navy); color:var(--text-on-dark-mute); padding:60px 0 26px; }
.footer-grid{ display:grid; grid-template-columns:1.4fr 1fr 1fr 1fr; gap:32px; padding-bottom:36px; border-bottom:1px solid rgba(255,255,255,.1); }
@media (max-width:820px){ .footer-grid{ grid-template-columns:1fr 1fr; } }
@media (max-width:520px){ .footer-grid{ grid-template-columns:1fr; } }
.site-footer h4{ color:#fff; font-family:var(--mono); font-size:12.5px; letter-spacing:.08em; text-transform:uppercase; margin-bottom:14px; }
.site-footer ul{ list-style:none; padding:0; margin:0; display:flex; flex-direction:column; gap:9px; font-size:14.5px; }
.site-footer a:hover{ color:#fff; }
.footer-bottom{ display:flex; justify-content:space-between; padding-top:22px; font-family:var(--mono); font-size:12px; flex-wrap:wrap; gap:8px; }

/* misc reused */
.logo-node{ display:none; }