/* ============================================================
   LUMÉRA — Header (верхняя строка + навигация), плавающие кнопки
   ============================================================ */

.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease), backdrop-filter var(--dur) var(--ease);
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled {
  background: rgba(20, 16, 12, .9);
  backdrop-filter: blur(14px) saturate(1.2);
  border-bottom-color: var(--line);
}

/* — Верхняя строка — */
.topbar { height: var(--topbar-h); display: flex; align-items: center; }
.topbar__inner { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; }

.logo { display: inline-flex; align-items: center; gap: .7rem; }
.logo__mark { color: var(--gold); }
.logo__mark svg { transition: transform var(--dur) var(--ease); }
.logo:hover .logo__mark svg { transform: translateY(-2px); }
.logo__text { display: flex; flex-direction: column; line-height: 1; }
.logo__name { font-family: var(--font-display); font-size: 1.35rem; letter-spacing: .18em; color: var(--cream); }
.logo__sub { font-size: .55rem; letter-spacing: .34em; text-transform: uppercase; color: var(--muted); margin-top: .35rem; }

.topbar__right { display: flex; align-items: center; gap: 1.25rem; }
.topbar__contact { text-align: right; line-height: 1.3; }
.topbar__addr { display: block; font-size: .76rem; color: var(--muted); }
.topbar__phone { display: block; font-size: .92rem; font-weight: 600; letter-spacing: .02em; color: var(--cream); transition: color var(--dur-fast); }
.topbar__phone:hover { color: var(--gold-bright); }
.topbar__icon {
  display: grid; place-items: center; width: 38px; height: 38px;
  border-radius: var(--radius-pill); border: 1px solid var(--line); color: var(--gold);
  transition: color var(--dur-fast), border-color var(--dur-fast);
}
.topbar__icon:hover { color: var(--gold-bright); border-color: var(--gold); }

/* — Навигация (вторая строка) — */
.navbar { height: var(--navbar-h); display: flex; align-items: center; border-top: 1px solid var(--line-soft); }
.nav__list { display: flex; align-items: center; gap: clamp(1rem, .3rem + 1.6vw, 2.4rem); }
.nav__link {
  position: relative; font-size: .86rem; font-weight: 500; letter-spacing: .03em;
  color: var(--cream); padding-block: .35rem; transition: color var(--dur-fast);
}
.nav__link::after {
  content: ""; position: absolute; left: 0; bottom: 0; width: 100%; height: 1px;
  background: var(--grad-gold); transform: scaleX(0); transform-origin: left;
  transition: transform var(--dur) var(--ease);
}
.nav__link:hover { color: var(--gold-bright); }
.nav__link:hover::after, .nav__link.is-active::after { transform: scaleX(1); }
.nav__link.is-active { color: var(--gold-bright); }

.nav__toggle { display: none; width: 44px; height: 44px; flex-direction: column; align-items: center; justify-content: center; gap: 5px; }
.nav__toggle span { display: block; width: 24px; height: 1.6px; background: var(--cream); border-radius: 2px; transition: transform var(--dur-fast) var(--ease), opacity var(--dur-fast) var(--ease); }

/* ===== Мобильный режим ===== */
@media (max-width: 900px) {
  :root { --header-h: 64px; }
  .topbar { height: 64px; }
  .topbar__contact { display: none; }
  .nav__toggle { display: flex; }
  .navbar { height: 0; padding: 0; border: 0; }

  .nav__list {
    position: fixed; inset: 0; flex-direction: column; justify-content: center; gap: 1.5rem;
    background: rgba(18, 14, 10, .97); backdrop-filter: blur(18px); padding: 2rem;
    opacity: 0; visibility: hidden; transform: translateY(-8px);
    transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), visibility var(--dur);
  }
  .nav__list.is-open { opacity: 1; visibility: visible; transform: none; }
  .nav__link { font-size: 1.3rem; font-family: var(--font-display); }

  .nav__toggle.is-open span:nth-child(1) { transform: translateY(6.6px) rotate(45deg); }
  .nav__toggle.is-open span:nth-child(2) { opacity: 0; }
  .nav__toggle.is-open span:nth-child(3) { transform: translateY(-6.6px) rotate(-45deg); }
}
@media (max-width: 540px) {
  .topbar__icon { display: none; }
  .logo__name { font-size: 1.2rem; }
}
body.nav-open { overflow: hidden; }

/* ===== Плавающая кнопка «Онлайн запись» ===== */
.floating-book {
  position: fixed; right: clamp(1rem, 2vw, 1.8rem); bottom: clamp(1rem, 2vw, 1.8rem); z-index: 90;
  width: 78px; height: 78px; display: grid; place-items: center; text-align: center;
  border-radius: var(--radius-pill); background: var(--grad-gold); color: #1B1610;
  box-shadow: var(--glow-gold); transition: transform var(--dur-fast) var(--ease);
}
.floating-book__txt { font-size: .68rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; line-height: 1.25; }
.floating-book::before {
  content: ""; position: absolute; inset: 0; border-radius: inherit;
  border: 1px solid var(--gold-bright); animation: pulse-ring 2.8s var(--ease) infinite;
}
.floating-book:hover { transform: scale(1.06); }
@keyframes pulse-ring { 0% { transform: scale(1); opacity: .7; } 70% { transform: scale(1.45); opacity: 0; } 100% { opacity: 0; } }

/* ===== Кнопка «наверх» ===== */
.to-top {
  position: fixed; left: clamp(1rem, 2vw, 1.8rem); bottom: clamp(1rem, 2vw, 1.8rem); z-index: 90;
  width: 46px; height: 46px; display: grid; place-items: center;
  border-radius: var(--radius-pill); border: 1px solid var(--line);
  background: rgba(20, 16, 12, .7); backdrop-filter: blur(8px); color: var(--gold);
  opacity: 0; visibility: hidden; transform: translateY(10px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), visibility var(--dur), border-color var(--dur-fast);
}
.to-top.is-visible { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { border-color: var(--gold); }

@media (prefers-reduced-motion: reduce) { .floating-book::before { animation: none; } }