:root {
  --slate-50: #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-300: #cbd5e1;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1e293b;
  --slate-900: #0f172a;
  --amber-50: #fffbeb;
  --amber-300: #fcd34d;
  --amber-900: #78350f;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: Arial, Helvetica, sans-serif; background: var(--slate-50); color: var(--slate-800); line-height: 1.55; }
a { color: inherit; }
.container { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }
.narrow { width: min(850px, calc(100% - 32px)); }
.site-header { position: sticky; top: 0; z-index: 10; background: rgba(255,255,255,.96); border-bottom: 1px solid var(--slate-200); }
.nav-wrap { display: flex; align-items: center; justify-content: space-between; padding: 12px 0; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; text-decoration: none; color: var(--slate-900); }
.brand-mark { width: 34px; height: 34px; border-radius: 12px; background: var(--slate-900); color: white; display: grid; place-items: center; }
.nav { display: flex; gap: 24px; font-size: 14px; }
.nav a { text-decoration: none; color: var(--slate-700); }
.nav a:hover { color: var(--slate-900); }
.menu-button { display: none; border: 1px solid var(--slate-300); background: white; padding: 8px 10px; border-radius: 10px; cursor:pointer; }
.hero { padding: 72px 0; }
.hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; align-items: center; }
h1 { font-size: clamp(36px, 5vw, 58px); line-height: 1.05; margin: 0; color: var(--slate-900); letter-spacing:-.03em; }
h2 { font-size: clamp(26px, 3vw, 36px); line-height: 1.15; margin: 0 0 12px; color: var(--slate-900); letter-spacing:-.02em; }
h3 { margin: 0 0 8px; color: var(--slate-900); }
.lead { font-size: 18px; color: var(--slate-600); margin-top: 20px; }
.hero-actions { display: flex; gap: 12px; margin-top: 24px; flex-wrap: wrap; }
.button { display: inline-flex; align-items: center; justify-content: center; border-radius: 12px; padding: 12px 18px; font-weight: 700; text-decoration: none; border: 0; cursor: pointer; font-size: 14px; }
.primary { background: var(--slate-900); color: white; }
.primary:hover { background: var(--slate-800); }
.secondary { background: white; color: var(--slate-900); border: 1px solid var(--slate-300); }
.full { width: 100%; }
.badges { display: flex; flex-wrap: wrap; gap: 14px; color: var(--slate-500); font-size: 14px; margin-top: 24px; }
.hero-card { background: white; border: 1px solid var(--slate-200); border-radius: 22px; padding: 22px; box-shadow: 0 12px 25px rgba(15,23,42,.08); }
.hero-card-inner { aspect-ratio: 16 / 9; border-radius: 18px; background: linear-gradient(135deg, var(--slate-900), var(--slate-700)); color: white; display: grid; place-content: center; text-align: center; padding: 30px; }
.hero-card-inner h2 { color: white; }
.hero-card-inner p { color: var(--slate-200); }
.section { padding: 64px 0; }
.white { background: white; border-top: 1px solid var(--slate-200); border-bottom: 1px solid var(--slate-200); }
.section-intro { color: var(--slate-600); max-width: 780px; }
.card-grid { display: grid; gap: 20px; margin-top: 28px; }
.four { grid-template-columns: repeat(4, 1fr); }
.three { grid-template-columns: repeat(3, 1fr); }
.two { grid-template-columns: repeat(2, 1fr); }
.card, .quote-card { background: white; border: 1px solid var(--slate-200); border-radius: 18px; padding: 24px; box-shadow: 0 4px 14px rgba(15,23,42,.04); }
.price { font-weight: 800; font-size: 22px; color: var(--slate-900); }
.quote-card { margin-top: 36px; }
.muted { color: var(--slate-600); }
.form-grid { display: grid; grid-template-columns: 1fr 2fr; gap: 16px; margin-top: 20px; }
label { font-size: 13px; color: var(--slate-600); }
input, select, textarea { width: 100%; margin-top: 6px; border: 1px solid var(--slate-300); border-radius: 12px; padding: 12px; font: inherit; background: white; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--slate-900); outline-offset: 1px; }
.checks { display: flex; flex-wrap: wrap; gap: 18px; margin: 18px 0; }
.checks input { width: auto; }
.estimate-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 18px; }
.estimate-box { border: 1px solid var(--slate-200); border-radius: 14px; padding: 16px; }
.estimate-box div { display: flex; justify-content: space-between; padding: 5px 0; gap: 12px; }
.estimate-box .total { border-top: 1px solid var(--slate-200); margin-top: 8px; padding-top: 12px; font-weight: 800; }
.info { border: 1px solid var(--slate-200); background: var(--slate-50); border-radius: 12px; padding: 12px; margin-top: 12px; color: var(--slate-600); }
.warning { border: 1px solid var(--amber-300); background: var(--amber-50); color: var(--amber-900); border-radius: 12px; padding: 12px; margin-top: 12px; }
.hidden { display: none; }
.small { font-size: 12px; }
.material-list { font-size: 13px; color: var(--slate-500); margin-top: 24px; }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.contact-form { display: grid; gap: 12px; margin-top: 20px; }
.footer { background: var(--slate-900); color: white; padding: 40px 0; }
.footer-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.footer p, .footer a { color: var(--slate-300); }
.quality-hero { background: var(--slate-900); color: white; padding: 76px 0; text-align: center; }
.quality-hero h1 { color: white; }
.quality-hero p { color: var(--slate-300); }
.policy h2 { margin-top: 34px; }
blockquote { border-left: 4px solid var(--slate-900); margin: 32px 0; padding-left: 18px; font-style: italic; color: var(--slate-800); }
.thank-you-page { min-height: calc(100vh - 60px); display: grid; place-items: center; padding: 32px 16px; }
.thank-you-card { background: white; border: 1px solid var(--slate-200); border-radius: 22px; padding: 42px; max-width: 640px; text-align: center; box-shadow: 0 14px 30px rgba(15,23,42,.08); }
.thank-you-card p { color: var(--slate-600); font-size: 18px; }

@media (max-width: 850px) {
  .menu-button { display: block; }
  .nav { display: none; position: absolute; top: 59px; left: 0; right: 0; background: white; border-bottom: 1px solid var(--slate-200); padding: 16px; flex-direction: column; gap: 12px; }
  .nav.open { display: flex; }
  .open-static { display: flex; position: static; border: 0; padding: 0; flex-direction: row; gap: 12px; font-size: 13px; }
  .hero { padding: 44px 0; }
  .hero-grid, .contact-grid, .estimate-grid, .form-grid { grid-template-columns: 1fr; }
  .four, .three, .two { grid-template-columns: 1fr; }
  .hero-actions .button { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; }
  .thank-you-card { padding: 28px 20px; }
}