/* ============================================================
   LAR — Layout: логотип, шапка, меню, каркас секций, футер
   ============================================================ */

/* ---------- Логотип (символ #lar-logo из спрайта) ---------- */
.logo {
  flex: none;
  display: block;
  color: var(--white);
  transition: opacity var(--dur-fast) ease;
}
.logo:hover { opacity: 0.85; }
.logo svg { height: 46px; width: auto; aspect-ratio: 531.4 / 203.1; }
/* На светлом фоне логотип одноцветный, как во втором варианте брендбука */
.logo--ink { color: var(--navy); --logo-mark: var(--navy); }

/* ---------- Шапка ---------- */
.header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  height: var(--header-h);
}
.header::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.94);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--line-dark);
  opacity: 0;
  transition: opacity var(--dur) ease;
}
.header.is-scrolled::before,
body.nav-open .header::before { opacity: 1; }

.header__inner {
  position: relative;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav { display: flex; gap: 0.15rem; margin-left: auto; }
.nav__link {
  position: relative;
  padding: 0.5rem 0.75rem;
  font-size: 0.93rem;
  font-weight: 500;
  color: var(--text-2);
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 0.75rem; right: 0.75rem; bottom: 0.15rem;
  height: 2px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur) var(--ease-out);
}
.nav__link:hover { color: var(--white); }
.nav__link:hover::after { transform: scaleX(1); }
.nav__link:active { opacity: 0.7; }

.header__actions { display: flex; align-items: center; gap: 1.25rem; }
.header__phone {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 600;
  white-space: nowrap;
}
.header__phone svg { width: 16px; height: 16px; color: var(--gold); }
.header__phone:hover { color: var(--gold); }
.header .btn { --btn-py: 0.75rem; --btn-px: 1.25rem; font-size: 0.9rem; }

.burger {
  display: none;
  width: 46px; height: 46px;
  border: 1px solid var(--line-dark-strong);
  border-radius: var(--r-md);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  transition: transform var(--dur) var(--ease-spring);
}
.burger:active { transform: scale(0.94); }
.burger span {
  width: 20px; height: 2px;
  border-radius: 2px;
  background: var(--white);
  transition: transform var(--dur) var(--ease-out), opacity var(--dur-fast) ease;
}
.burger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger.is-open span:nth-child(2) { opacity: 0; }
.burger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Мобильное меню ---------- */
.mobile-nav {
  position: fixed;
  inset: var(--header-h) 0 0;
  z-index: 40;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 1.5rem var(--gutter) 2rem;
  overflow-y: auto;
  background: var(--black) url("../img/pattern.svg") 0 0 / 200px auto;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-12px);
  transition: opacity var(--dur) var(--ease-out), transform var(--dur) var(--ease-out), visibility 0s linear var(--dur);
}
.mobile-nav.is-open {
  opacity: 1;
  visibility: visible;
  transform: none;
  transition-delay: 0s;
}
.mobile-nav a:not(.btn) {
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--line-dark);
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
}
.mobile-nav a:not(.btn):active { color: var(--gold); }
.mobile-nav .mobile-nav__phone { color: var(--gold); font-size: 1.25rem; border-bottom: 0; margin-top: 0.8rem; }
.mobile-nav__cta { margin-top: 0.8rem; }

/* ---------- Каркас секций ---------- */
.section { position: relative; padding-block: var(--section-y); }
.section--graphite { background: var(--graphite); }
.section--light { background: var(--mist); color: var(--ink); }
.section--light .eyebrow { color: var(--ink); }

.section-head { max-width: 44rem; margin-bottom: clamp(2.5rem, 2rem + 2vw, 4rem); }
.section-head--split {
  max-width: none;
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1.5rem 4rem;
}
.section-head--split > :first-child { max-width: 40rem; }
.section-title {
  margin-top: 1.1rem;
  font-size: var(--text-3xl);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: var(--tracking-tight);
}
.section-sub {
  margin-top: 1.1rem;
  max-width: 36rem;
  font-size: var(--text-lg);
  color: var(--text-2);
}
.section--light .section-sub { color: var(--ink-2); }
.section-head--split .section-sub { margin-top: 0; max-width: 28rem; }

/* ---------- Футер ---------- */
.footer {
  padding-block: clamp(3.5rem, 2.5rem + 3vw, 5.5rem) 2rem;
  border-top: 1px solid var(--line-dark);
  background: var(--black);
  color: var(--text-2);
  font-size: var(--text-sm);
}
.footer__grid {
  display: grid;
  grid-template-columns: 1.7fr repeat(3, 1fr);
  gap: 2.5rem 3rem;
}
.footer .logo svg { height: 56px; }
.footer__about > p { margin-top: 1.4rem; max-width: 22rem; line-height: 1.65; }
.footer__contacts { display: grid; gap: 0.35rem; margin-top: 1.4rem; }
.footer__contacts a { display: inline-flex; align-items: center; gap: 0.6rem; width: fit-content; }
.footer__contacts svg { width: 16px; height: 16px; color: var(--gold); flex: none; }
.footer__contacts a:hover { color: var(--white); }
.footer__col h4 {
  margin-bottom: 1.1rem;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--gold);
}
.footer__col ul { display: grid; gap: 0.6rem; }
.footer__col a:hover { color: var(--white); }
.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.8rem 2rem;
  margin-top: 3.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line-dark);
  color: var(--text-3);
  font-size: var(--text-xs);
}
.footer__bottom a:hover { color: var(--white); }

/* ---------- Адаптив ---------- */
@media (max-width: 1200px) {
  .nav { display: none; }
  .header__actions { margin-left: auto; }
  .burger { display: flex; }
}
@media (max-width: 900px) {
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .footer__about { grid-column: 1 / -1; }
}
@media (max-width: 640px) {
  :root { --header-h: 68px; }
  .logo svg { height: 40px; }
  .header__phone { display: none; }
  .header .btn { display: none; }
  .footer__grid { grid-template-columns: 1fr; }
}