.music-toggle {
  min-height: 42px;
  padding: 0 15px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid rgba(255,255,255,.16);
  border-radius: 999px;
  color: #f5f7fb;
  background: rgba(255,255,255,.055);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.09);
  cursor: pointer;
  font: 650 13px/1 -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", "PingFang SC", sans-serif;
  white-space: nowrap;
  transition: transform .25s ease, background .25s ease, border-color .25s ease;
}
.music-toggle:hover { transform: translateY(-1px); background: rgba(255,255,255,.09); }
.music-icon { width: 20px; height: 20px; display: inline-flex; }
.music-icon svg { width: 100%; height: 100%; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.music-icon .speaker-shape { fill: currentColor; stroke: none; }
.music-toggle .mute-mark { display: none; }
.music-toggle.is-muted .sound-wave { display: none; }
.music-toggle.is-muted .mute-mark { display: inline; }
@media (max-width: 860px) {
  .music-toggle {
    width: 42px;
    height: 42px;
    min-width: 42px;
    min-height: 42px;
    padding: 0;
    flex: 0 0 42px;
    border-radius: 50%;
  }
  .music-toggle .music-label { display: none; }
}

@media (max-width: 1100px) {
  .site-header :is(.mobile-menu-toggle, .music-toggle, .lang-toggle) {
    width: 44px;
    height: 44px;
    min-width: 44px;
    min-height: 44px;
    padding: 0;
    flex: 0 0 44px;
    justify-content: center;
    border-radius: 50%;
  }
  .site-header .music-label,
  .site-header .lang-toggle [data-lang-current],
  .site-header .lang-chevron { display: none; }
}

:is(.footer, .detail-footer, .ss-footer, .p-footer) {
  flex-wrap: wrap;
}
.music-copyright {
  flex: 1 0 100%;
  text-align: center;
  font-size: 10px;
  line-height: 1.6;
  letter-spacing: .02em;
  opacity: .68;
}

/* Navigation may use more horizontal space than the reading column on desktop. */
@media (min-width: 861px) {
  :is(.site-header, .ss-nav, .detail-nav, .p-nav) {
    width: min(100% - 48px, 1320px);
  }
}

/* Keep the music and language controls together at the right of detail navs. */
:is(.ss-nav, .detail-nav, .p-nav) {
  justify-content: flex-start;
  column-gap: 10px;
}
:is(.ss-nav, .detail-nav, .p-nav) > nav {
  margin-left: auto;
}
:is(.ss-nav, .detail-nav, .p-nav) > .lang-switcher {
  margin-left: 0;
}
@media (min-width: 861px) {
  :is(.ss-nav, .detail-nav, .p-nav) > nav {
    position: static;
    margin-left: auto;
    transform: none;
  }
  :is(.ss-nav, .detail-nav, .p-nav) > .music-toggle {
    margin-left: 0;
  }
}
@media (min-width: 861px) and (max-width: 1050px) {
  :is(.ss-nav, .detail-nav, .p-nav) > nav {
    gap: 14px;
    font-size: 13px;
  }
  :is(.ss-nav, .detail-nav, .p-nav) > .music-toggle,
  :is(.ss-nav, .detail-nav, .p-nav) .lang-toggle {
    width: 42px;
    height: 42px;
    min-width: 42px;
    min-height: 42px;
    padding: 0;
    border-radius: 50%;
  }
  :is(.ss-nav, .detail-nav, .p-nav) .music-label,
  :is(.ss-nav, .detail-nav, .p-nav) .lang-toggle [data-lang-current],
  :is(.ss-nav, .detail-nav, .p-nav) .lang-chevron {
    display: none;
  }
}
@media (max-width: 860px) {
  :is(.ss-nav, .detail-nav, .p-nav) > .music-toggle {
    margin-left: auto;
  }
  :is(.ss-nav, .detail-nav, .p-nav) .lang-toggle {
    width: 42px;
    height: 42px;
    min-width: 42px;
    min-height: 42px;
    padding: 0;
    border-radius: 50%;
  }
  :is(.ss-nav, .detail-nav, .p-nav) > .lang-switcher {
    margin-left: 0 !important;
  }
}

/* Shared touch navigation for project and philosophy pages. */
.secondary-menu-toggle {
  position: relative;
  width: 44px;
  height: 44px;
  min-width: 44px;
  padding: 0;
  display: none;
  flex: 0 0 44px;
  border: 1px solid rgba(255,255,255,.16);
  border-radius: 50%;
  color: #f5f7fb;
  background: rgba(255,255,255,.055);
  cursor: pointer;
}
.secondary-menu-toggle span {
  position: absolute;
  left: 12px;
  right: 12px;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
  transition: transform .3s cubic-bezier(.16,1,.3,1), top .3s cubic-bezier(.16,1,.3,1);
}
.secondary-menu-toggle span:first-child { top: 16px; }
.secondary-menu-toggle span:last-child { top: 25px; }
:is(.ss-nav, .detail-nav, .p-nav).nav-open .secondary-menu-toggle span:first-child { top: 21px; transform: rotate(45deg); }
:is(.ss-nav, .detail-nav, .p-nav).nav-open .secondary-menu-toggle span:last-child { top: 21px; transform: rotate(-45deg); }
.brand-label-compact { display: none; }
:is(section[id], main[id]) { scroll-margin-top: 92px; }

@media (max-width: 860px) {
  :is(.ss-nav, .detail-nav, .p-nav) {
    position: sticky;
    overflow: visible;
    gap: 8px;
  }
  :is(.ss-nav, .detail-nav, .p-nav) > :is(.ss-brand, .detail-brand, .p-brand) {
    min-width: 0;
  }
  :is(.ss-nav, .detail-nav, .p-nav) > :is(.ss-brand, .detail-brand) span {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  :is(.ss-nav, .detail-nav) .brand-label-full { display: none; }
  :is(.ss-nav, .detail-nav) .brand-label-compact { display: inline; }
  :is(.ss-nav, .detail-nav, .p-nav) > .p-brand {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  :is(.ss-nav, .detail-nav, .p-nav) > .secondary-menu-toggle {
    display: inline-flex;
    margin-left: auto;
  }
  :is(.ss-nav, .detail-nav, .p-nav) > .music-toggle { margin-left: 0; }
  :is(.ss-nav, .detail-nav, .p-nav) > nav { display: none; }
  :is(.ss-nav, .detail-nav, .p-nav).nav-open > nav {
    display: grid !important;
    grid-template-columns: repeat(2, minmax(0,1fr));
    gap: 8px;
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    max-height: calc(100svh - 92px);
    margin: 0;
    padding: 10px;
    overflow: auto;
    border: 1px solid rgba(255,255,255,.13);
    border-radius: 24px;
    background: rgba(7,10,15,.96);
    box-shadow: 0 24px 68px rgba(0,0,0,.42), inset 0 1px 0 rgba(255,255,255,.08);
    backdrop-filter: blur(28px) saturate(165%);
    -webkit-backdrop-filter: blur(28px) saturate(165%);
    transform: none;
    z-index: 130;
  }
  :is(.ss-nav, .detail-nav, .p-nav).nav-open > nav a {
    min-height: 46px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10px 12px;
    border: 1px solid rgba(255,255,255,.09);
    border-radius: 15px;
    color: #e5ebf2;
    background: rgba(255,255,255,.04);
    text-align: center;
    line-height: 1.25;
  }
  :is(.ss-nav, .detail-nav, .p-nav) > .music-toggle,
  :is(.ss-nav, .detail-nav, .p-nav) .lang-toggle {
    width: 44px;
    height: 44px;
    min-width: 44px;
    min-height: 44px;
    flex-basis: 44px;
  }
  body.secondary-menu-active { overflow: hidden; }
  body.secondary-menu-active::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: 80;
    background: rgba(2,4,7,.68);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
  }
}

@media (max-width: 360px) {
  :is(.ss-nav, .detail-nav, .p-nav) > :is(.ss-brand, .detail-brand) span { max-width: 92px; }
  :is(.ss-nav, .detail-nav, .p-nav).nav-open > nav { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  .secondary-menu-toggle span { transition: none; }
}

/* Detail pages share a centered directory with balanced side columns. */
@media (min-width: 861px) {
  :is(.ss-nav, .detail-nav, .p-nav) {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
    align-items: center;
    column-gap: 16px;
  }
  :is(.ss-nav, .detail-nav, .p-nav) > :is(.ss-brand, .detail-brand, .p-home-link) {
    grid-column: 1;
    grid-row: 1;
    justify-self: start;
    min-width: 0;
  }
  :is(.ss-nav, .detail-nav, .p-nav) > :is(nav, .p-contents-link) {
    display: flex;
    grid-column: 2;
    grid-row: 1;
    justify-content: center;
    justify-self: center;
    margin: 0;
  }
  :is(.ss-nav, .detail-nav, .p-nav) > .music-toggle,
  :is(.ss-nav, .detail-nav, .p-nav) > .lang-switcher {
    grid-column: 3;
    grid-row: 1;
    justify-self: end;
    margin: 0;
  }
  :is(.ss-nav, .detail-nav, .p-nav) > .music-toggle { margin-right: 54px; }
  :is(.ss-nav, .detail-nav, .p-nav) .music-toggle,
  :is(.ss-nav, .detail-nav, .p-nav) .lang-toggle {
    width: 44px;
    height: 44px;
    min-width: 44px;
    min-height: 44px;
    padding: 0;
    justify-content: center;
    border-radius: 50%;
  }
  :is(.ss-nav, .detail-nav, .p-nav) .music-label,
  :is(.ss-nav, .detail-nav, .p-nav) [data-lang-current],
  :is(.ss-nav, .detail-nav, .p-nav) .lang-chevron { display: none; }
}
@media (min-width: 861px) and (max-width: 1100px) {
  :is(.ss-nav, .detail-nav) .brand-label-full { display: none; }
  :is(.ss-nav, .detail-nav) .brand-label-compact { display: inline; }
  :is(.ss-nav, .detail-nav) > nav { gap: 12px; font-size: 12px; }
}
@media (min-width: 861px) and (max-width: 940px) {
  :is(.ss-nav, .detail-nav) .brand-label-compact { display: none; }
}

/* Shared reading-position highlight; preserve label widths and keyboard focus. */
:is(.site-header, .ss-nav, .detail-nav, .p-nav) nav a[aria-current="location"] {
  color: #8dcbff;
  background: rgba(41,151,255,.13);
  border-radius: 8px;
  box-shadow: 0 0 0 7px rgba(41,151,255,.13);
  text-shadow: 0 0 16px rgba(41,151,255,.32);
  transition: color .2s ease, background-color .2s ease, box-shadow .2s ease;
}
:is(.site-header.menu-open, .ss-nav.nav-open, .detail-nav.nav-open, .p-nav.nav-open) nav a[aria-current="location"] {
  border-color: rgba(104,188,255,.45);
  background: rgba(41,151,255,.16);
  box-shadow: inset 0 0 0 1px rgba(104,188,255,.08);
  border-radius: 16px;
}
@media (prefers-reduced-motion: reduce) {
  :is(.site-header, .ss-nav, .detail-nav, .p-nav) nav a[aria-current="location"] { transition: none; }
}