/* ────────────────────────────────────────────────────────────────
   D & M Constructions (UK) — Base Styles
   Modern, responsive, accessible. UK spelling used in copy.
   ──────────────────────────────────────────────────────────────── */
*{box-sizing:border-box}
:root{
  --primary: var(--brand-primary, #0f172a);
  --accent:  var(--brand-accent,  #f59e0b);
  --text:    var(--brand-text,    #0b1020);
  --muted:   var(--brand-muted,   #64748b);
  --bg:      var(--brand-bg,      #fff);
  --card:    #f8fafc;
  --ring:    rgba(245,158,11,.3);
  --shadow:  0 10px 30px rgba(2,6,23,.08);
  --radius:  18px;
}

html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:Manrope,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.6}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}

/* Header */
.site-header{position:sticky;top:0;background:#fff;border-bottom:1px solid #e5e7eb;z-index:50}
.header-inner{display:flex;justify-content:space-between;align-items:center;height:72px;gap:16px}
.logo{display:flex;align-items:center;gap:12px;font-weight:800}
.logo-badge{display:inline-grid;place-items:center;width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,var(--primary),#1e293b);color:#fff;font-weight:800}
.logo-text{font-weight:800;letter-spacing:.2px;white-space:nowrap}
.nav-toggle{display:none;background:none;border:0;padding:8px;cursor:pointer}
.nav-toggle span{display:block;width:24px;height:2px;background:#0b1020;margin:5px 0;border-radius:2px;transition:.2s}

.main-nav{display:flex;gap:16px;align-items:center}
.main-nav a{padding:10px 12px;border-radius:10px;color:#0b1020}
.main-nav a:hover{background:#f1f5f9}
.main-nav .active{font-weight:700}
.btn{display:inline-block;padding:10px 14px;border-radius:12px;border:1px solid #e2e8f0;font-weight:700}
.btn:hover{box-shadow:var(--shadow)}
.btn-accent{background:var(--accent);border-color:var(--accent);color:#111827}
.btn-accent:hover{filter:brightness(.95)}

/* Hero */
.hero{position:relative;overflow:hidden;background:radial-gradient(1200px 400px at 20% -20%, rgba(245,158,11,.15), transparent), linear-gradient(180deg,#ffffff,#f8fafc);border-bottom:1px solid #e5e7eb}
.hero-inner{display:grid;grid-template-columns:1.2fr .8fr;align-items:center;gap:28px;padding:72px 0}
.eyebrow{font-weight:700;letter-spacing:.14em;color:var(--accent);text-transform:uppercase;font-size:.8rem}
.title{font-size:clamp(2rem, 3.6vw, 3.2rem);line-height:1.1;margin:.2rem 0 1rem 0;letter-spacing:-.02em}
.subtitle{color:var(--muted);max-width:56ch}
.hero-card{background:#fff;padding:20px;border-radius:18px;box-shadow:var(--shadow);border:1px solid #e2e8f0}
.hero-badges{display:flex;gap:10px;flex-wrap:wrap;margin-top:10px}
.badge{padding:6px 10px;border-radius:999px;border:1px solid #e2e8f0;background:#fff;font-size:.85rem}

/* Sections */
.section{padding:64px 0}
.section .section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;margin-bottom:28px}
.section h2{font-size:clamp(1.6rem,2.6vw,2.4rem);margin:0}
.muted{color:var(--muted)}
.small{font-size:.9rem}

/* Cards grid */
.grid{display:grid;gap:18px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--card);border:1px solid #e2e8f0;border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);transition:transform .2s}
.card:hover{transform:translateY(-2px)}
.card h3{margin-top:0}

/* Feature strip */
.feature{display:flex;gap:14px;align-items:flex-start}
.feature .icon{width:44px;height:44px;border-radius:12px;background:linear-gradient(135deg,var(--primary),#1e293b);display:grid;place-items:center;color:#fff;flex:none}
.feature .icon span{font-weight:800}

/* Projects */
.filters{display:flex;gap:10px;flex-wrap:wrap}
.chip{border:1px solid #e2e8f0;background:#fff;border-radius:999px;padding:6px 12px;font-weight:700;cursor:pointer}
.chip.active{background:var(--accent);border-color:var(--accent)}
.project{overflow:hidden}
.project img{width:100%;border-radius:12px;margin-bottom:12px}

/* Footer */
.site-footer{margin-top:40px;border-top:1px solid #e5e7eb;background:#fff}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:24px;padding:36px 0}
.footer-logo{margin-bottom:8px}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;border-top:1px solid #e5e7eb;padding:14px 0}

/* Forms */
.form{display:grid;gap:12px}
.input, .form input, .form textarea, .form select{width:100%;padding:12px 14px;border:1px solid #e2e8f0;border-radius:12px;background:#fff}
.form textarea{min-height:120px}
.form .help{color:var(--muted);font-size:.9rem}
.form .actions{display:flex;gap:12px;align-items:center}

/* Utilities */
.cta{display:flex;justify-content:space-between;align-items:center;gap:16px;background:linear-gradient(90deg,#fff,rgba(245,158,11,.15));border:1px dashed var(--accent);padding:18px;border-radius:18px}

@media (max-width: 880px){
  .hero-inner{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .grid-3{grid-template-columns:1fr}
  .grid-4{grid-template-columns:1fr 1fr}
  .main-nav{position:absolute;inset:72px 0 auto 0;background:#fff;border-bottom:1px solid #e5e7eb;display:none;flex-direction:column;padding:12px}
  .main-nav.show{display:flex}
  .nav-toggle{display:block}
}