/* ============================================
   LUMO — Хромирование в Москве
   Main stylesheet: variables, reset, layout, typography
   ============================================ */

:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #111118;
  --bg-card: #1a1a2e;
  --accent: #C0392B;
  --accent-light: #E74C3C;
  --chrome-1: #B8C6DB;
  --chrome-2: #E8EAF0;
  --chrome-3: #A0B4C8;
  --gold: #D4AF37;
  --text-primary: #F0F0F0;
  --text-secondary: #A0A0B0;
  --border: #2a2a3e;
  --success: #27AE60;
  --wa: #25D366;
  --tg: #0088cc;

  --font-head: 'Montserrat', system-ui, -apple-system, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;

  --container: 1240px;
  --radius: 12px;
  --radius-sm: 4px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-wrap: break-word;
}
/* Noise grain overlay */
body::before {
  content: '';
  position: fixed; inset: 0;
  z-index: 9999;
  pointer-events: none;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px 256px;
}
img, svg, video { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: 0; background: none; color: inherit; }
input, select, textarea { font-family: inherit; font-size: inherit; color: inherit; }
ul { margin: 0; padding: 0; list-style: none; }
p { margin: 0 0 1em; }

/* ---------- Typography ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 700;
  line-height: 1.15;
  margin: 0 0 0.5em;
  letter-spacing: -0.02em;
}
h1 { font-size: clamp(32px, 5vw, 64px); font-weight: 800; }
h2 { font-size: clamp(24px, 3.5vw, 42px); }
h3 { font-size: clamp(20px, 2.4vw, 28px); font-weight: 600; }
h4 { font-size: clamp(18px, 1.8vw, 22px); font-weight: 600; }

.chrome-text {
  background: linear-gradient(90deg, #B8C6DB, #E8EAF0, #A0B4C8, #E8EAF0);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-size: 200% auto;
  animation: shine 4s linear infinite;
}
.accent-text { color: var(--accent); }
.gold-text { color: var(--gold); }

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
section { padding: clamp(64px, 8vw, 120px) 0; position: relative; overflow: hidden; }
/* Ambient glow orbs on alternating sections */
section:nth-child(odd)::before {
  content: '';
  position: absolute;
  width: 500px; height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(192, 57, 43, 0.08), transparent 70%);
  top: -150px; right: -200px;
  pointer-events: none;
  filter: blur(60px);
}
section:nth-child(even)::after {
  content: '';
  position: absolute;
  width: 400px; height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(184, 198, 219, 0.06), transparent 70%);
  bottom: -120px; left: -150px;
  pointer-events: none;
  filter: blur(50px);
}
.section-head { max-width: 780px; margin: 0 auto clamp(40px, 5vw, 64px); text-align: center; }
.section-head .eyebrow {
  display: inline-block;
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent);
  margin-bottom: 16px;
}
.section-head p { color: var(--text-secondary); font-size: 18px; }

.grid { display: grid; gap: 24px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-6 { grid-template-columns: repeat(3, 1fr); }

/* ---------- Header ---------- */
.header {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 16px 0;
  background: transparent;
  transition: var(--transition);
}
.header.scrolled {
  background: rgba(10, 10, 15, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
}
.header.hidden { transform: translateY(-100%); }
.header__inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.logo {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 24px;
  letter-spacing: 0.05em;
  display: flex; align-items: center; gap: 8px;
}
.logo__dot { width: 10px; height: 10px; background: var(--accent); border-radius: 50%; box-shadow: 0 0 12px var(--accent); }
.nav { display: flex; gap: 28px; }
.nav a { font-size: 15px; color: var(--text-secondary); transition: var(--transition); }
.nav a:hover { color: var(--text-primary); }
.header__phone {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 16px;
  white-space: nowrap;
}
.header__cta { display: flex; align-items: center; gap: 16px; }
.burger { display: none; width: 32px; height: 32px; flex-direction: column; justify-content: center; gap: 6px; }
.burger span { display: block; width: 24px; height: 2px; background: var(--text-primary); transition: var(--transition); }
.burger.active span:nth-child(1) { transform: translateY(4px) rotate(45deg); }
.burger.active span:nth-child(2) { transform: translateY(-4px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 120px;
  padding-bottom: 80px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse at 20% 30%, rgba(192, 57, 43, 0.18), transparent 50%),
    radial-gradient(ellipse at 80% 70%, rgba(184, 198, 219, 0.08), transparent 50%);
  z-index: -1;
}
.hero::after {
  content: '';
  position: absolute; inset: 0;
  background-image: linear-gradient(var(--border) 1px, transparent 1px), linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.08;
  mask-image: radial-gradient(ellipse at center, #000 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 70%);
  z-index: -1;
}
.hero__grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 64px; align-items: center; }
.hero__eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: 50px;
  background: rgba(26, 26, 46, 0.5);
  font-size: 13px; text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--text-secondary);
  margin-bottom: 24px;
  backdrop-filter: blur(8px);
}
.hero__eyebrow::before { content: ''; width: 8px; height: 8px; background: var(--success); border-radius: 50%; box-shadow: 0 0 8px var(--success); }
.hero h1 { margin-bottom: 24px; }
.hero__subtitle { font-size: 20px; color: var(--text-secondary); margin-bottom: 40px; max-width: 560px; }
.hero__cta { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 48px; }
.hero__trust { display: flex; gap: 32px; flex-wrap: wrap; }
.hero__trust div { }
.hero__trust .num { font-family: var(--font-head); font-weight: 800; font-size: 32px; color: var(--text-primary); line-height: 1; }
.hero__trust .lbl { font-size: 13px; color: var(--text-secondary); margin-top: 6px; text-transform: uppercase; letter-spacing: 0.08em; }
.hero__visual {
  position: relative;
  aspect-ratio: 1 / 1.1;
  border-radius: var(--radius);
  background: linear-gradient(145deg, #1a1a2e, #0a0a0f);
  border: 1px solid var(--border);
  overflow: hidden;
  display: flex; align-items: center; justify-content: center;
}
.hero__visual::before {
  content: '';
  position: absolute; inset: 0;
  background: conic-gradient(from 0deg at 50% 50%, transparent, rgba(184, 198, 219, 0.15), transparent 30%);
  animation: spin 8s linear infinite;
}
.hero__visual-photo {
  position: relative;
  width: 100%; height: 100%;
  object-fit: cover;
  z-index: 1;
  filter: brightness(1.02) contrast(1.05);
}
.hero__visual::after {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at center, transparent 55%, rgba(10, 10, 15, 0.55) 100%);
  z-index: 2;
  pointer-events: none;
}

/* ---------- Services ---------- */
.services__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }

/* ---------- Advantages (UTP) ---------- */
.utp__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.utp-card {
  padding: 32px;
  background: rgba(26, 26, 46, 0.6);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(184, 198, 219, 0.08);
  border-radius: var(--radius);
  transition: var(--transition);
  position: relative;
}
.utp-card::before {
  content: '';
  position: absolute; inset: 0;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(184, 198, 219, 0.04), transparent 60%);
  pointer-events: none;
}
.utp-card:hover { border-color: rgba(192, 57, 43, 0.5); transform: translateY(-4px); box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3), 0 0 30px rgba(192, 57, 43, 0.08); }
.utp-card__icon {
  width: 56px; height: 56px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, rgba(192, 57, 43, 0.2), rgba(192, 57, 43, 0.05));
  border: 1px solid rgba(192, 57, 43, 0.3);
  border-radius: 14px;
  margin-bottom: 20px;
  font-size: 26px;
}
.utp-card h3 { margin-bottom: 12px; font-size: 20px; }
.utp-card p { color: var(--text-secondary); font-size: 15px; margin: 0; }

/* ---------- Process ---------- */
.process__grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; position: relative; }
.process-step {
  position: relative;
  padding: 28px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
}
.process-step__num {
  position: absolute;
  top: -20px; left: 50%;
  transform: translateX(-50%);
  width: 44px; height: 44px;
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 18px;
  color: #fff;
  box-shadow: 0 4px 20px rgba(192, 57, 43, 0.5);
}
.process-step h4 { margin: 12px 0 8px; }
.process-step p { color: var(--text-secondary); font-size: 14px; margin: 0; }

/* ---------- Portfolio ---------- */
.portfolio__filters { display: flex; gap: 12px; justify-content: center; margin-bottom: 40px; flex-wrap: wrap; }
.filter-btn {
  padding: 10px 20px;
  border: 1px solid var(--border);
  border-radius: 50px;
  color: var(--text-secondary);
  font-size: 14px;
  transition: var(--transition);
}
.filter-btn:hover { color: var(--text-primary); border-color: var(--chrome-1); }
.filter-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }

.portfolio__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.portfolio-item {
  position: relative;
  aspect-ratio: 1 / 1;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: var(--transition);
}
.portfolio-item:hover { transform: translateY(-4px); border-color: var(--accent); }
.portfolio-item:hover img { transform: scale(1.05); }
.portfolio-item img {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease;
}
.portfolio-item::after {
  content: '';
  position: absolute; left: 0; right: 0; bottom: 0;
  height: 50%;
  background: linear-gradient(to top, rgba(10,10,15,0.9), rgba(10,10,15,0));
  pointer-events: none;
  z-index: 1;
}
.portfolio-item__caption {
  position: absolute;
  left: 16px; right: 16px; bottom: 16px;
  font-size: 14px;
  color: #fff;
  font-weight: 600;
  z-index: 2;
}
.portfolio-item__tag {
  position: absolute;
  top: 16px; left: 16px;
  padding: 6px 12px;
  background: rgba(10, 10, 15, 0.7);
  backdrop-filter: blur(8px);
  border-radius: 50px;
  font-family: var(--font-head);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--chrome-2);
  z-index: 3;
  text-transform: uppercase;
}

/* ---------- Reviews ---------- */
.reviews__track { display: flex; gap: 24px; overflow-x: auto; padding-bottom: 12px; scroll-snap-type: x mandatory; scrollbar-width: thin; }
.reviews__track::-webkit-scrollbar { height: 6px; }
.reviews__track::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
.review-card {
  flex: 0 0 360px;
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  scroll-snap-align: start;
}
.review-card__head { display: flex; align-items: center; gap: 14px; margin-bottom: 16px; }
.review-card__avatar {
  width: 48px; height: 48px;
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-head); font-weight: 800; font-size: 18px;
  color: #fff;
}
.review-card__name { font-weight: 600; }
.review-card__meta { font-size: 13px; color: var(--text-secondary); }
.review-card__stars { color: var(--gold); margin-bottom: 12px; font-size: 16px; letter-spacing: 2px; }
.review-card p { color: var(--text-secondary); font-size: 15px; margin: 0; }
.review-card__source { margin-top: 16px; font-size: 12px; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.1em; }

/* ---------- FAQ ---------- */
.faq { max-width: 860px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  background: var(--bg-card);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item[open] { border-color: var(--accent); }
.faq-item summary {
  padding: 22px 28px;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 17px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+';
  font-size: 28px;
  color: var(--accent);
  transition: var(--transition);
  line-height: 1;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item__body {
  padding: 0 28px 22px;
  color: var(--text-secondary);
  font-size: 15px;
}

/* ---------- Promo banner ---------- */
.promo {
  background: linear-gradient(135deg, var(--accent), #8a1f14);
  border-radius: var(--radius);
  padding: 48px;
  position: relative;
  overflow: hidden;
  text-align: center;
}
.promo::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(circle at 20% 30%, rgba(255,255,255,0.15), transparent 50%);
}
.promo > * { position: relative; z-index: 1; }
.promo h2 { color: #fff; margin-bottom: 16px; }
.promo p { color: rgba(255,255,255,0.85); font-size: 18px; margin-bottom: 32px; }
.promo__timer { display: flex; justify-content: center; gap: 16px; margin-bottom: 32px; }
.promo__timer-item {
  background: rgba(0,0,0,0.3);
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  min-width: 80px;
  backdrop-filter: blur(8px);
}
.promo__timer .num { font-family: var(--font-head); font-weight: 800; font-size: 32px; color: #fff; line-height: 1; }
.promo__timer .lbl { font-size: 11px; color: rgba(255,255,255,0.7); text-transform: uppercase; letter-spacing: 0.1em; margin-top: 4px; }

/* ---------- Contact block + form ---------- */
.contact {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 48px;
  align-items: start;
}
.contact__info h2 { margin-bottom: 16px; }
.contact__info p { color: var(--text-secondary); font-size: 18px; margin-bottom: 32px; }
.contact__list { display: flex; flex-direction: column; gap: 20px; }
.contact__item { display: flex; gap: 16px; align-items: flex-start; }
.contact__item-icon {
  flex-shrink: 0;
  width: 44px; height: 44px;
  background: rgba(192, 57, 43, 0.12);
  border: 1px solid rgba(192, 57, 43, 0.3);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: var(--accent);
}
.contact__item-label { font-size: 13px; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 4px; }
.contact__item-value { font-family: var(--font-head); font-weight: 600; font-size: 18px; }

/* ---------- Footer ---------- */
.footer {
  padding: 64px 0 32px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
}
.footer__grid { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 48px; margin-bottom: 48px; }
.footer h4 { font-size: 14px; text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 20px; color: var(--text-primary); }
.footer p, .footer a { color: var(--text-secondary); font-size: 14px; }
.footer ul li { margin-bottom: 10px; }
.footer a:hover { color: var(--text-primary); }
.footer__bottom {
  padding-top: 32px;
  border-top: 1px solid var(--border);
  display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap;
  font-size: 13px; color: var(--text-secondary);
}

/* ---------- Responsive ---------- */
@media (max-width: 1199px) {
  .services__grid, .utp__grid, .portfolio__grid { grid-template-columns: repeat(2, 1fr); }
  .process__grid { grid-template-columns: repeat(3, 1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 900px) {
  .hero__grid { grid-template-columns: 1fr; gap: 48px; }
  .hero__visual { max-width: 400px; margin: 0 auto; }
  .contact { grid-template-columns: 1fr; }
}
@media (max-width: 767px) {
  .nav { display: none; }
  .header__phone { display: none; }
  .burger { display: flex; }
  .header.scrolled .nav.open {
    display: flex; flex-direction: column;
    position: absolute; top: 100%; left: 0; right: 0;
    background: rgba(10, 10, 15, 0.98);
    padding: 24px; gap: 20px;
    border-bottom: 1px solid var(--border);
  }
  .services__grid, .utp__grid, .portfolio__grid, .process__grid { grid-template-columns: 1fr; }
  .hero__trust { gap: 20px; }
  .hero__trust .num { font-size: 26px; }
  .promo { padding: 32px 20px; }
  .promo__timer { gap: 10px; }
  .promo__timer-item { min-width: 64px; padding: 12px 14px; }
  .promo__timer .num { font-size: 26px; }
  .footer__grid { grid-template-columns: 1fr; gap: 32px; }
  .review-card { flex: 0 0 min(300px, 85vw); }
  .section-head p { font-size: 16px; }
  .contact__item-value { font-size: 16px; }
  section { padding: 72px 0; }
}
@media (max-width: 479px) {
  .container { padding: 0 16px; }
  .hero__eyebrow { font-size: 11px; padding: 6px 12px; }
  .hero__subtitle { font-size: 17px; }
  .hero__cta .btn { width: 100%; }
  .promo__timer { flex-wrap: wrap; justify-content: center; gap: 8px; }
  .promo__timer-item { min-width: 60px; padding: 10px 12px; }
  .promo__timer .num { font-size: 22px; }
  .promo__timer .lbl { font-size: 10px; }
  .faq-item summary { padding: 18px 20px; font-size: 15px; }
  .faq-item__body { padding: 0 20px 18px; }
  .footer__bottom { flex-direction: column; gap: 8px; }
}