/* ── HEADER — КВАЗАР, плавающая пилюля, логотип по центру ── */
.header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  padding-top: 14px;
  background: transparent;
}

/* Плавающий бар: [нав] [лого по центру] [контролы] */
.header__bar {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: var(--space-4);
  height: 64px;
  padding: 0 0.6rem;
  border-radius: var(--radius-full);
  background: var(--header-bg);
  border: 1px solid var(--color-border);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-md);
  transition: background var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}
.header.is-scrolled .header__bar {
  background: var(--header-bg-scrolled);
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-lg);
}

/* НАВИГАЦИЯ — слева */
.header__nav { justify-self: start; padding-left: 0.6rem; }
.nav__list { display: flex; align-items: center; gap: 0.25rem; }
.nav__link {
  display: inline-block;
  padding: 0.5rem 0.9rem;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  white-space: nowrap;
  transition: color var(--transition-fast), background var(--transition-fast);
}
.nav__link:hover { color: var(--color-text); background: var(--color-surface-2); }
.nav__link.is-active { color: var(--color-text); background: var(--color-surface-2); }

/* ЛОГО — по центру */
.header__logo {
  justify-self: center;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.header__logo-img {
  display: block;
  height: 28px;
  width: auto;
  filter: var(--logo-filter);
  transition: opacity var(--transition-fast);
}
.header__logo:hover .header__logo-img { opacity: .75; }

/* КОНТРОЛЫ — справа */
.header__controls { justify-self: end; display: flex; align-items: center; gap: var(--space-3); padding-right: 0.2rem; }

/* ТЕМА */
.theme-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-full);
  color: var(--color-text);
  transition: all var(--transition-fast);
  flex-shrink: 0;
}
.theme-toggle:hover { border-color: var(--color-gold); color: var(--color-gold); box-shadow: var(--glow-gold); }
.theme-toggle svg { width: 18px; height: 18px; }
.theme-toggle__moon { display: none; }
.theme-toggle__sun  { display: block; }
[data-theme="light"] .theme-toggle__moon { display: block; }
[data-theme="light"] .theme-toggle__sun  { display: none; }

/* ЯЗЫК */
.lang { position: relative; }
.lang__btn {
  display: inline-flex; align-items: center; gap: 6px;
  height: 38px; padding: 0 0.8rem;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text);
  transition: all var(--transition-fast);
}
.lang__btn:hover { border-color: var(--color-gold); color: var(--color-gold); }
.lang__btn-arrow { font-size: 8px; transition: transform var(--transition-fast); }
.lang.is-open .lang__btn-arrow { transform: rotate(180deg); }
.lang__menu {
  position: absolute; top: calc(100% + 10px); right: 0;
  min-width: 140px;
  background: var(--color-surface);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  padding: 6px;
  box-shadow: var(--shadow-lg);
  opacity: 0; visibility: hidden; transform: translateY(-6px);
  transition: all var(--transition-fast);
  z-index: var(--z-dropdown);
}
.lang.is-open .lang__menu { opacity: 1; visibility: visible; transform: translateY(0); }
.lang__option {
  display: flex; align-items: center; justify-content: space-between;
  width: 100%; padding: 0.5rem 0.7rem;
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  transition: all var(--transition-fast);
}
.lang__option:hover { background: var(--color-surface-2); color: var(--color-text); }
.lang__option.is-active { color: var(--color-gold); }
.lang__option small { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-text-dim); }
.lang__soon { font-family: var(--font-mono); font-size: 9px; color: var(--color-text-dim); border: 1px solid var(--color-border); border-radius: var(--radius-full); padding: 1px 6px; }

.header__cta { white-space: nowrap; }

/* БУРГЕР */
.header__burger {
  display: none;
  flex-direction: column; gap: 5px;
  width: 38px; height: 38px;
  align-items: center; justify-content: center;
  flex-shrink: 0;
}
.header__burger span { display: block; width: 22px; height: 1.5px; background: var(--color-text); transition: all var(--transition-fast); }

/* ── ПЛАНШЕТ / МОБИЛЬНАЯ ── */
@media (max-width: 1080px) {
  .header__bar { height: 60px; }
  .header__burger { display: flex; }
  .header__nav {
    position: absolute; top: calc(100% + 10px); left: 0; right: 0;
    flex-direction: column;
    background: var(--menu-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: var(--space-6);
    box-shadow: var(--shadow-lg);
    display: none;
    justify-self: stretch;
  }
  .header__nav.is-open { display: flex; }
  .nav__list { flex-direction: column; align-items: flex-start; gap: var(--space-1); width: 100%; }
  .nav__link { font-size: var(--text-lg); padding: var(--space-3) var(--space-4); width: 100%; }
}
@media (max-width: 560px) {
  .lang { display: none; }
  .header__cta { display: none; }
}