/* =====================================================
   EVA CLINIC — PREMIUM HEADER
===================================================== */

body { padding-top: var(--header-h); }
body.has-transparent-header { padding-top: 0; }

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 1000;
  background: rgba(250, 247, 241, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border);
  transition: background 0.35s var(--ease), box-shadow 0.35s var(--ease), border-color 0.35s var(--ease);
}

.site-header--transparent {
  background: transparent;
  border-bottom-color: transparent;
}
.site-header--transparent:not(.is-scrolled) .brand-name,
.site-header--transparent:not(.is-scrolled) .brand-tag {
  color: #fff;
}
.site-header--transparent:not(.is-scrolled) .nav-link {
  color: rgba(255, 255, 255, 0.92);
}
.site-header--transparent:not(.is-scrolled) .nav-link:hover,
.site-header--transparent:not(.is-scrolled) .nav-link.active { color: #fff; }
.site-header--transparent:not(.is-scrolled) .nav-link.active::after { background: var(--color-accent-light); }
.site-header--transparent:not(.is-scrolled) .header-call {
  border-color: rgba(255, 255, 255, 0.5);
  color: #fff;
}
.site-header--transparent:not(.is-scrolled) .menu-toggle span { background: #fff; }

.site-header.is-scrolled {
  background: rgba(250, 247, 241, 0.96);
  box-shadow: var(--shadow-md);
  border-bottom-color: var(--color-border);
}

.header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  flex-shrink: 0;
}
.brand-logo {
  height: 48px;
  width: 48px;
  border-radius: 50%;
  object-fit: cover;
  background: #fff;
  border: 2px solid var(--color-accent);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--color-ink);
  letter-spacing: 0.02em;
  transition: color 0.3s var(--ease);
}
.brand-tag {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-muted);
  transition: color 0.3s var(--ease);
}

.main-nav ul {
  display: flex;
  align-items: center;
  gap: 1.9rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-link {
  position: relative;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--color-ink-soft);
  padding: 0.4rem 0;
  transition: color 0.25s var(--ease);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -4px;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease);
}
.nav-link:hover { color: var(--color-ink); }
.nav-link:hover::after { transform: scaleX(1); }
.nav-link.active { color: var(--color-ink); }
.nav-link.active::after { transform: scaleX(1); background: var(--color-accent); }

.header-actions { display: flex; align-items: center; gap: 0.9rem; }
.header-call {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  color: var(--color-ink);
  text-decoration: none;
  transition: transform 0.25s var(--ease), background 0.25s var(--ease), color 0.25s var(--ease);
}
.header-call:hover { transform: translateY(-2px); background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.header-cta { white-space: nowrap; padding: 0.7rem 1.4rem; }

/* ---------- Hamburger ---------- */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  border: none;
  background: transparent;
  cursor: pointer;
  padding: 0;
}
.menu-toggle span {
  display: block;
  height: 2px;
  width: 24px;
  margin-inline: auto;
  background: var(--color-ink);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease), background 0.3s var(--ease);
}

/* ---------- Mobile off-canvas menu ---------- */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 1100;
  visibility: hidden;
  pointer-events: none;
}
.mobile-menu.is-open { visibility: visible; pointer-events: auto; }

/* The backdrop covers the full screen (inset: 0), including the area
   under the panel, purely to catch tap-outside-to-close. It must never
   sit above the panel in paint order, or it silently swallows every tap
   meant for the nav links/buttons underneath — explicit z-index below,
   not left to DOM order, so this can't regress if markup order changes. */
.menu-backdrop {
  position: absolute;
  inset: 0;
  z-index: 0;
  background: rgba(15, 15, 14, 0.5);
  opacity: 0;
  transition: opacity 0.35s var(--ease);
}
.mobile-menu.is-open .menu-backdrop { opacity: 1; }

.mobile-menu-panel {
  position: absolute;
  top: 0; right: 0; bottom: 0;
  z-index: 1;
  width: min(360px, 86vw);
  background: var(--color-bg);
  box-shadow: -20px 0 60px rgba(0,0,0,0.25);
  padding: var(--space-3) var(--space-3) var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  transform: translateX(100%);
  transition: transform 0.4s var(--ease);
  overflow-y: auto;
}
.mobile-menu.is-open .mobile-menu-panel { transform: translateX(0); }

.mobile-menu-head { display: flex; justify-content: flex-start; padding-bottom: var(--space-2); border-bottom: 1px solid var(--color-border); }
.mobile-menu-links { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; }
.mobile-menu-links a {
  display: block;
  padding: 0.9rem 0.2rem;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-ink);
  border-bottom: 1px solid var(--color-border);
}
.mobile-menu-links a.active { color: var(--color-primary); }
.mobile-menu-cta { display: flex; flex-direction: column; gap: 0.75rem; }
.mobile-menu-social { display: flex; gap: 0.6rem; flex-wrap: wrap; }
.mobile-menu-social a {
  width: 40px; height: 40px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 50%;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  text-decoration: none;
}
body.menu-open { overflow: hidden; }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .main-nav, .header-cta, .header-call { display: none; }
  .menu-toggle { display: flex; }
}

@media (max-width: 560px) {
  :root { --header-h: 76px; }
  .brand-logo { height: 40px; width: 40px; }
  .brand-name { font-size: 1.15rem; }
  .brand-tag { display: none; }
}