/* ==========================================================================
   Header / Navigation
   ========================================================================== */
.site-header{
  position: sticky; top: 0; z-index: 100;
  background: oklch(97% 0.012 80 / 0.86);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur-med) var(--ease-out), box-shadow var(--dur-med) var(--ease-out);
}
.site-header.is-scrolled{
  border-color: var(--line);
  box-shadow: 0 8px 30px -20px oklch(24% 0.015 260 / 0.5);
}
.site-header__inner{
  display: flex; align-items: center; justify-content: space-between; gap: 1.5rem;
  padding-block: 1.35rem;
  transition: padding-block var(--dur-med) var(--ease-out);
}
.site-header.is-scrolled .site-header__inner{ padding-block: .8rem; }

.site-header__brand{ display: flex; align-items: center; }
.site-header__wordmark{ display: flex; flex-direction: column; line-height: 1; }
.site-header__wordmark-main{ font-family: var(--font-display); font-style: italic; font-weight: 500; font-size: 1.6rem; letter-spacing: -0.01em; color: var(--ink); }
.site-header__wordmark-sub{ font-size: .62rem; letter-spacing: .18em; text-transform: uppercase; color: var(--accent-dark); margin-top: .3em; }
.custom-logo{ max-height: 52px; width: auto; }

.site-header__nav{ display: none; }
.nav-list{ display: flex; align-items: center; gap: clamp(1.4rem, 2vw, 2.4rem); }
.nav-list a{
  font-size: .95rem; font-weight: 500; color: var(--ink-soft);
  position: relative; padding-block: .3em;
  transition: color var(--dur-fast) var(--ease-out);
}
.nav-list a::after{
  content: ""; position: absolute; left: 0; right: 100%; bottom: -2px; height: 1px;
  background: var(--accent-dark); transition: right var(--dur-fast) var(--ease-out);
}
.nav-list a:hover{ color: var(--ink); }
.nav-list a:hover::after{ right: 0; }
.nav-list .current-menu-item > a{ color: var(--ink); }
.nav-list .current-menu-item > a::after{ right: 0; }

.site-header__actions{ display: flex; align-items: center; gap: 1rem; }
.site-header__phone{ display: none; align-items: center; gap: .5em; font-size: .9rem; font-weight: 500; color: var(--ink-soft); }
.site-header__phone:hover{ color: var(--accent-dark); }
.site-header__cta{ display: none; }

.burger{
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px; border: 1px solid var(--line-strong); border-radius: var(--radius);
  background: var(--bg); position: relative; flex: 0 0 auto;
}
.burger .icon{ position: absolute; transition: opacity var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out); }
.burger__close{ opacity: 0; transform: rotate(-90deg) scale(.7); }
.burger[aria-expanded="true"] .burger__open{ opacity: 0; transform: rotate(90deg) scale(.7); }
.burger[aria-expanded="true"] .burger__close{ opacity: 1; transform: rotate(0) scale(1); }

.mobile-drawer{
  position: fixed; top: 0; right: 0; height: 100dvh; width: min(86vw, 380px);
  background: var(--bg); z-index: 150; padding: 6.5rem 2rem 2rem;
  transform: translateX(100%); transition: transform var(--dur-med) var(--ease-out);
  display: flex; flex-direction: column; justify-content: space-between;
  box-shadow: -20px 0 60px -30px oklch(24% 0.015 260 / 0.4);
  overflow-y: auto;
}
.mobile-drawer.is-open{ transform: translateX(0); }
.mobile-drawer__list{ display: flex; flex-direction: column; gap: .3rem; }
.mobile-drawer__list a{
  display: block; padding: .85em 0; font-family: var(--font-display); font-size: 1.4rem; color: var(--ink);
  border-bottom: 1px solid var(--line);
}
.mobile-drawer__contact{ display: flex; flex-direction: column; gap: 1rem; margin-top: 2rem; }
.mobile-drawer__contact a{ display: flex; align-items: center; gap: .6em; font-weight: 500; }
.mobile-drawer__contact .btn{ justify-content: center; }

.mobile-drawer__overlay{
  position: fixed; inset: 0; background: oklch(24% 0.015 260 / 0.35); z-index: 140;
  opacity: 0; pointer-events: none; transition: opacity var(--dur-med) var(--ease-out);
}
.mobile-drawer__overlay.is-open{ opacity: 1; pointer-events: auto; }

@media (min-width: 900px){
  .site-header__nav{ display: block; }
  .site-header__phone{ display: inline-flex; }
  .site-header__cta{ display: inline-flex; }
  .burger{ display: none; }
  .mobile-drawer, .mobile-drawer__overlay{ display: none; }
}