:root {
  --nav-glass: rgba(255, 255, 255, 0.92);
  --nav-stroke: #172b461c;
  --nav-shadow: 0 5px 24px #172b4606;
  --nav-radius: 32px;
}
miru-header {
  display: block;
  height: 64px;
  position: sticky;
  top: 16px;
  z-index: 50;
  width: calc(100% - 64px);
  max-width: 1200px;
  margin: 16px auto 0;
}
.site-header {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  height: 64px;
  padding: 0 10px 0 23px;
  border: 1px solid var(--nav-stroke);
  border-radius: var(--nav-radius);
  background: #fff;
  box-shadow: var(--nav-shadow);
  transition:
    height 0.25s var(--ease),
    box-shadow 0.25s,
    border-color 0.25s;
}
.site-header.is-scrolled {
  height: 58px;
  border-color: #172b4628;
  box-shadow: 0 6px 30px #172b4610;
}
.site-header .brand-lockup {
  width: 142px;
  height: 28px;
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 2px;
}
.nav-trigger {
  display: flex;
  align-items: center;
  gap: 7px;
  min-height: 44px;
  padding: 0 16px;
  border-radius: 25px;
  font-size: 13px;
  font-weight: 500;
  transition:
    background 0.2s,
    color 0.2s;
}
.nav-trigger:hover,
.nav-trigger[aria-expanded='true'] {
  background: #edf3f7;
  color: #172b46;
}
.nav-trigger svg {
  transition: transform 0.2s;
}
.nav-trigger[aria-expanded='true'] svg {
  transform: rotate(180deg);
}
.site-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-app {
  min-height: 44px;
  padding: 0 22px;
  border-radius: 25px;
  font-size: 12px;
  gap: 22px;
}
.nav-toggle {
  display: none;
}
.nav-surface {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  width: min(730px, 100%);
  height: 140px;
  transform: translate(-50%, 5px);
  opacity: 0;
  visibility: hidden;
  border: 1px solid var(--nav-stroke);
  border-radius: 20px;
  background: #fff;
  box-shadow: 0 14px 40px #172b4612;
  transition:
    opacity 0.18s,
    transform 0.18s,
    visibility 0.18s;
  pointer-events: none;
}
.has-panel .nav-surface {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0);
}
.nav-panel {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  width: min(730px, 100%);
  height: 140px;
  transform: translateX(-50%);
  padding: 18px;
  z-index: 1;
}
.nav-panel[hidden] {
  display: none;
}
.nav-panel-items {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  height: 100%;
}
.nav-group:last-child .nav-panel-items {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}
.nav-panel a,
.nav-panel button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  min-height: 90px;
  width: 100%;
  text-align: left;
  padding: 14px;
  border-radius: 12px;
  transition: background 0.18s;
}
.nav-panel a:hover,
.nav-panel button:hover,
.nav-panel a[aria-current='page'] {
  background: #f2f6f9;
}
.nav-panel b {
  display: block;
  font-size: 13px;
  font-weight: 550;
  line-height: 1.6;
}
.nav-panel small {
  display: block;
  font-size: 10px;
  color: #607284;
  line-height: 1.8;
  margin-top: 7px;
}
.nav-panel i {
  font-style: normal;
  font-size: 17px;
  color: #527fa3;
  align-self: start;
  margin-top: 3px;
}
.nav-panel :focus-visible {
  outline-offset: 0;
}
@supports (backdrop-filter: blur(20px)) {
  .site-header {
    background: var(--nav-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
  }
}
@media (max-width: 1000px) {
  miru-header {
    width: calc(100% - 40px);
  }
  .site-header {
    gap: 10px;
    padding-left: 20px;
  }
  .nav-trigger {
    padding: 0 12px;
  }
  .site-header .brand-lockup {
    width: 128px;
  }
  .nav-app {
    padding: 0 18px;
    gap: 16px;
  }
}
@media (max-width: 760px) {
  html {
    scroll-padding-top: 100px;
  }
  miru-header {
    height: 60px;
    top: 10px;
    margin-top: 10px;
    width: calc(100% - 24px);
  }
  .site-header,
  .site-header.is-scrolled {
    height: 60px;
    padding: 0 8px 0 17px;
    gap: 8px;
    border-radius: 32px;
  }
  .site-header .brand-lockup {
    width: 118px;
    height: 26px;
  }
  .nav-app {
    min-height: 44px;
    font-size: 11px;
    padding: 0 14px;
    gap: 10px;
  }
  .nav-toggle {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
  }
  .nav-toggle span {
    width: 18px;
    height: 1.5px;
    background: #172b46;
    transition: transform 0.2s;
  }
  .nav-toggle[aria-expanded='true'] span:first-child {
    transform: translateY(3.75px) rotate(45deg);
  }
  .nav-toggle[aria-expanded='true'] span:last-child {
    transform: translateY(-3.75px) rotate(-45deg);
  }
  .nav-surface {
    display: none;
  }
  .site-nav {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    max-height: calc(100dvh - 100px);
    overflow: auto;
    overscroll-behavior: contain;
    background: #fff;
    border: 1px solid var(--nav-stroke);
    border-radius: 20px;
    box-shadow: 0 18px 50px #172b461c;
    padding: 10px;
  }
  .nav-open .site-nav {
    display: block;
  }
  .nav-group + .nav-group {
    border-top: 1px solid #e6edf3;
  }
  .nav-trigger {
    width: 100%;
    min-height: 52px;
    justify-content: space-between;
    padding: 0 16px;
    border-radius: 12px;
    font-size: 14px;
  }
  .nav-panel {
    position: static;
    transform: none;
    width: 100%;
    height: auto;
    padding: 0 4px 8px;
    border: 0;
    box-shadow: none;
    background: transparent;
    border-radius: 0;
  }
  .nav-panel-items,
  .nav-group:last-child .nav-panel-items {
    grid-template-columns: 1fr;
    gap: 2px;
  }
  .nav-panel a,
  .nav-panel button {
    min-height: 68px;
    padding: 12px;
    border-radius: 10px;
  }
  .nav-panel b {
    font-size: 13px;
  }
  .nav-panel small {
    font-size: 11px;
    margin-top: 2px;
  }
  .nav-panel i {
    font-size: 16px;
  }
}
@media (max-width: 359px) {
  .nav-app {
    padding: 0 12px;
  }
  .nav-app > span {
    display: none;
  }
  .site-actions {
    gap: 2px;
  }
  .site-header {
    padding-left: 12px;
  }
  .site-header .brand-lockup {
    width: 112px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .site-header,
  .nav-trigger,
  .nav-trigger svg,
  .nav-toggle span,
  .nav-panel a,
  .nav-panel button,
  .nav-surface {
    transition: none;
  }
}