/* Тайган · Header + Mobile Navigation */

/* ── Fixed glass header ── */
.site-header {
  position: fixed; inset-block-start: 0; inset-inline: 0;
  z-index: 300; height: var(--nav-h);
  background: rgba(255,255,255,.88);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0,0,0,.07);
  transition: box-shadow var(--dur) var(--ease);
}
.site-header.scrolled { box-shadow: 0 4px 28px rgba(0,0,0,.09); }

.header-inner {
  height: 100%; display: flex; align-items: center; gap: 2rem;
}

/* ── Logo ── */
.logo { display: flex; align-items: center; gap: .625rem; flex-shrink: 0; transition: opacity var(--dur) var(--ease); }
.logo:hover { opacity: .78; }
.logo__mark {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--brand); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--ff-h); font-weight: var(--fw-9); font-size: 1rem; flex-shrink: 0;
}
.logo__name {
  font-family: var(--ff-h); font-weight: var(--fw-9);
  font-size: 1.2rem; letter-spacing: .06em; text-transform: uppercase; color: var(--ink);
}

/* ── Main navigation ── */
.main-nav {
  flex: 1; display: flex; justify-content: center; align-items: center;
  gap: clamp(.75rem, 2vw, 2.25rem);
}
.nav-link {
  font-family: var(--ff-h); font-size: .78rem; font-weight: var(--fw-6);
  letter-spacing: .05em; text-transform: uppercase;
  color: var(--ink-3); padding-block: .3rem; position: relative;
  transition: color var(--dur) var(--ease);
}
.nav-link::after {
  content: ''; position: absolute; bottom: -2px; left: 0;
  width: 0; height: 2px; background: var(--brand);
  border-radius: var(--r-f); transition: width var(--dur) var(--ease);
}
.nav-link:hover,
.nav-link[aria-current="page"] { color: var(--ink); }
.nav-link:hover::after,
.nav-link[aria-current="page"]::after { width: 100%; }

.nav-cta { flex-shrink: 0; }

/* ── Burger button ── */
.burger {
  display: none; flex-direction: column; gap: 5px;
  padding: .5rem; margin-left: auto; flex-shrink: 0;
}
.burger span {
  display: block; width: 22px; height: 2px;
  background: var(--ink); border-radius: var(--r-f);
  transition: transform .28s var(--ease), opacity .28s var(--ease);
}
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Mobile drawer ── */
.nav-drawer {
  display: none; position: fixed; inset: 0; z-index: 250;
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px);
  flex-direction: column; padding: calc(var(--nav-h) + 2rem) 2rem 2rem;
  gap: .25rem;
}
.nav-drawer.open { display: flex; animation: drawerIn .28s var(--ease-out); }
.nav-drawer .nav-link {
  font-size: clamp(1.5rem, 5vw, 2.25rem); font-weight: var(--fw-9);
  letter-spacing: .01em; color: var(--ink); padding-block: .5rem;
}
.nav-drawer .btn { margin-top: 2rem; align-self: flex-start; }

@keyframes drawerIn {
  from { opacity: 0; transform: translateY(-16px); }
  to   { opacity: 1; transform: none; }
}

/* ── Page hero (shared inner-page component) ── */
.page-hero {
  position: relative; overflow: hidden;
  padding-top: calc(var(--nav-h) + clamp(3rem, 8vw, 6rem));
  padding-bottom: clamp(3rem, 8vw, 6rem);
}
.page-hero__bg {
  position: absolute; inset: -10%;
  background: linear-gradient(160deg, #050A07 0%, #0D2518 30%, #1D3D2B 65%, #2A6041 100%);
  background-size: cover; background-position: center;
}
.page-hero__overlay {
  position: absolute; inset: 0;
  background: linear-gradient(170deg, rgba(5,15,8,.80) 0%, rgba(5,15,8,.45) 100%);
}
.page-hero__content { position: relative; z-index: 2; }
.page-hero__h1 {
  font-family: var(--ff-h); font-weight: var(--fw-9);
  font-size: clamp(2.5rem, 7vw, 6rem);
  line-height: .96; letter-spacing: -.04em; text-transform: uppercase;
  color: var(--white); margin-bottom: 1rem;
}
.page-hero__sub { font-size: clamp(.95rem, 1.8vw, 1.15rem); color: rgba(255,255,255,.62); max-width: 540px; }

/* ── Responsive ── */
@media (max-width: 860px) {
  .main-nav, .nav-cta { display: none; }
  .burger { display: flex; }
}
@media (max-width: 540px) {
  .header-inner { gap: 0; }
}