:root{
  --cap-h: 56px;
  --cap-pad: 6px;
  --pill-h: 40px;
}

:root[data-theme="light"]{
  --navbg: rgba(255,255,255,0.28);
  --nav-border: rgba(15,23,42,0.10);
  --nav-shine: rgba(255,255,255,0.55);
}

:root[data-theme="dark"]{
  --navbg: rgba(15,23,42,0.22);
  --nav-border: rgba(255,255,255,0.10);
  --nav-shine: rgba(255,255,255,0.14);
}

:root{
  --c-glass: #bbbbbc;
  --c-light: #ffffff;
  --c-dark:  #000000;
  --glass-reflex-dark: 1;
  --glass-reflex-light: 1;
  --glass-saturation: 150%;
  --glass-blur: 6px;
  --track-tint: 8%;
  --track-inset-dark: 14%;
  --track-inset-light: 22%;
}

:root[data-theme="dark"]{
  --glass-reflex-dark: 2;
  --glass-reflex-light: 0.3;
  --track-tint: 12%;
  --track-inset-dark: 22%;
  --track-inset-light: 12%;
}

.nav-wrap{
  position: fixed;
  top: calc(var(--edge) + env(safe-area-inset-top));
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - (2 * var(--gutter)));
  max-width: 1100px;
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: 12px;
}

nav.site-nav{
  position: relative;
  width: 100%;
  height: var(--cap-h);
  padding: var(--cap-pad) 16px;
  border-radius: 999px;
  background-color: color-mix(in srgb, var(--c-glass) 12%, transparent);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturation));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturation));
  box-shadow:
    inset 0 0 0 1px color-mix(in srgb, var(--c-light) calc(var(--glass-reflex-light) * 10%), transparent),
    inset 1.8px 3px 0px -2px color-mix(in srgb, var(--c-light) calc(var(--glass-reflex-light) * 90%), transparent),
    inset -2px -2px 0px -2px color-mix(in srgb, var(--c-light) calc(var(--glass-reflex-light) * 80%), transparent),
    inset -3px -8px 1px -6px color-mix(in srgb, var(--c-light) calc(var(--glass-reflex-light) * 60%), transparent),
    inset -0.3px -1px 4px 0px color-mix(in srgb, var(--c-dark) calc(var(--glass-reflex-dark) * 12%), transparent),
    inset -1.5px 2.5px 0px -2px color-mix(in srgb, var(--c-dark) calc(var(--glass-reflex-dark) * 20%), transparent),
    inset 0px 3px 4px -2px color-mix(in srgb, var(--c-dark) calc(var(--glass-reflex-dark) * 20%), transparent),
    inset 2px -6.5px 1px -4px color-mix(in srgb, var(--c-dark) calc(var(--glass-reflex-dark) * 10%), transparent),
    0px 1px 5px 0px color-mix(in srgb, var(--c-dark) calc(var(--glass-reflex-dark) * 10%), transparent),
    0px 6px 16px 0px color-mix(in srgb, var(--c-dark) calc(var(--glass-reflex-dark) * 8%), transparent);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

nav.site-nav::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background: linear-gradient(to bottom, var(--nav-shine), transparent 60%);
  opacity: 0.8;
}

nav.site-nav > *{ position: relative; }

.nav-left, .nav-right{
  display: flex;
  gap: 10px;
  align-items: center;
}

.nav-left{
  flex: 1 1 auto;
  min-width: 0;
}

.brand{
  font-weight: 900;
  color: var(--text-h);
  font-size: 0.95rem;
  letter-spacing: -0.3px;
  white-space: nowrap;
  text-decoration: none;
}
.brand:visited{ color: var(--text-h); }

.brand { color: var(--accent); }

.brand-text{ display: inline; }
.brand-short{ display: none; }

@media (max-width: 860px){
  .brand-first{ display: none; }
  .brand-last{ display: none; }
  .brand-short{ display: inline; }
}

.pills{
  display: flex;
  gap: 6px;
  align-items: center;
  padding: 4px;
  border-radius: 999px;
  background-color: color-mix(in srgb, var(--c-dark) var(--track-tint), transparent);
  box-shadow:
    inset 0 1px 0 color-mix(in srgb, var(--c-light) var(--track-inset-light), transparent),
    inset 0 -1px 0 color-mix(in srgb, var(--c-dark) var(--track-inset-dark), transparent),
    inset 0 10px 18px -14px rgba(0,0,0,.35);
}

.pill{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 12px;
  border-radius: 999px;
  border: none;
  background: transparent;
  font-weight: 800;
  font-size: 0.78rem;
  color: var(--text-p);
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.18s, background 0.18s, color 0.18s, box-shadow 0.18s;
}

.pill:hover{ transform: translateY(-1px); }

.pill[aria-current="page"]{
  background: var(--accent);
  color: #fff;
  box-shadow: 0 10px 18px rgba(37, 99, 235, 0.25);
}

.lang-group{
  display: flex;
  gap: 4px;
  padding: 3px;
  border-radius: 999px;
  background-color: color-mix(
    in srgb,
    var(--c-dark) calc(var(--track-tint) * 0.7),
    transparent
  );
  box-shadow:
    inset 0 1px 0 color-mix(in srgb, var(--c-light) 16%, transparent),
    inset 0 -1px 0 color-mix(in srgb, var(--c-dark) 14%, transparent),
    inset 0 8px 14px -12px rgba(0,0,0,.3);
}

.l-btn{
  border: none;
  background: none;
  padding: 6px 12px;
  border-radius: 999px;
  font-weight: 800;
  cursor: pointer;
  font-size: 0.74rem;
  color: var(--text-p);
  transition: 0.18s;
}

.l-btn[aria-pressed="true"]{
  background: var(--accent);
  color: #fff;
  box-shadow:
    inset 0 1px 1px rgba(255,255,255,.35),
    inset 0 -1px 1px rgba(0,0,0,.25);
}

.btn{
  background: rgba(255,255,255,0.75);
  border: 1px solid var(--border);
  color: var(--text-h);
  padding: 8px 12px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.78rem;
  font-weight: 800;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
  transition: transform 0.18s, box-shadow 0.18s, background 0.18s;
}

:root[data-theme="dark"] .btn{
  background: rgba(15, 23, 42, 0.55);
}

.btn:hover{
  transform: translateY(-1px);
  box-shadow: 0 10px 20px -8px rgba(0,0,0,0.15);
}

.btn:focus-visible,
.pill:focus-visible,
.l-btn:focus-visible{
  outline: 2px solid rgba(37, 99, 235, 0.45);
  outline-offset: 2px;
}

.btn-theme{
  padding: 8px 10px;
}

.btn-theme i{
  font-size: 16px;
  line-height: 1;
}

:root[data-theme="light"] .icon-moon{ display: none; }
:root[data-theme="dark"]  .icon-sun{ display: none; }

.nav-tools{
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px;
  border-radius: 999px;
  background-color: color-mix(in srgb, var(--c-glass) 12%, transparent);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturation));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturation));
  box-shadow:
    inset 0 0 0 1px color-mix(in srgb, var(--c-light) calc(var(--glass-reflex-light) * 10%), transparent),
    inset 1.8px 3px 0px -2px color-mix(in srgb, var(--c-light) calc(var(--glass-reflex-light) * 90%), transparent),
    inset -2px -2px 0px -2px color-mix(in srgb, var(--c-light) calc(var(--glass-reflex-light) * 80%), transparent),
    inset -3px -8px 1px -6px color-mix(in srgb, var(--c-light) calc(var(--glass-reflex-light) * 60%), transparent),
    inset -0.3px -1px 4px 0px color-mix(in srgb, var(--c-dark) calc(var(--glass-reflex-dark) * 12%), transparent),
    inset -1.5px 2.5px 0px -2px color-mix(in srgb, var(--c-dark) calc(var(--glass-reflex-dark) * 20%), transparent),
    inset 0px 3px 4px -2px color-mix(in srgb, var(--c-dark) calc(var(--glass-reflex-dark) * 20%), transparent),
    inset 2px -6.5px 1px -4px color-mix(in srgb, var(--c-dark) calc(var(--glass-reflex-dark) * 10%), transparent),
    0px 1px 5px 0px color-mix(in srgb, var(--c-dark) calc(var(--glass-reflex-dark) * 10%), transparent),
    0px 6px 16px 0px color-mix(in srgb, var(--c-dark) calc(var(--glass-reflex-dark) * 8%), transparent);
    position: relative;
    overflow: visible;
    isolation: isolate;
}

.nav-tools::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background: linear-gradient(to bottom, var(--nav-shine), transparent 60%);
  opacity: 0.8;
  border-radius: inherit;
}
.nav-tools > *{ position: relative; }

.btn-icon{
  width: 42px;
  height: 42px;
  padding: 0;
  border-radius: 999px;
  justify-content: center;
}
.btn-icon i{
  font-size: 16px;
  line-height: 1;
}

@media (max-width: 768px){
  .btn-print{ display: none; }
}

@media (max-width: 768px){
  .nav-wrap{
    left: calc(var(--gutter) + env(safe-area-inset-left));
    right: calc(var(--gutter) + env(safe-area-inset-right));
    transform: none;
    width: auto;
    max-width: none;
  }

  nav.site-nav{
    padding: var(--space-2) var(--space-3);
    border-radius: 9999px;
  }

  .nav-left{
    flex-wrap: wrap;
    gap: 10px;
  }

  .pills{
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  .pills::-webkit-scrollbar{ display:none; }
  .pill{ flex: 0 0 auto; }

  .nav-right{
    margin-left: auto;
    justify-content: flex-end;
    gap: 8px;
  }

  .lang-group{ padding: 3px; }
  .l-btn{ padding: 6px 9px; }

  .btn-icon{
    width: 40px;
    height: 40px;
  }
}

.bottom-nav{
  position: fixed;
  left: calc(var(--gutter) + env(safe-area-inset-left));
  right: calc(var(--gutter) + env(safe-area-inset-right));
  bottom: calc(var(--edge) + env(safe-area-inset-bottom));
  z-index: 1200;
  height: var(--cap-h);
  padding: var(--cap-pad);
  align-items: center;
  border-radius: 999px;
  background-color: color-mix(in srgb, var(--c-glass) 12%, transparent);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturation));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturation));
  box-shadow:
    inset 0 0 0 1px color-mix(in srgb, var(--c-light) calc(var(--glass-reflex-light) * 10%), transparent),
    inset 1.8px 3px 0px -2px color-mix(in srgb, var(--c-light) calc(var(--glass-reflex-light) * 90%), transparent),
    inset -2px -2px 0px -2px color-mix(in srgb, var(--c-light) calc(var(--glass-reflex-light) * 80%), transparent),
    inset -3px -8px 1px -6px color-mix(in srgb, var(--c-light) calc(var(--glass-reflex-light) * 60%), transparent),
    inset -0.3px -1px 4px 0px color-mix(in srgb, var(--c-dark) calc(var(--glass-reflex-dark) * 12%), transparent),
    inset -1.5px 2.5px 0px -2px color-mix(in srgb, var(--c-dark) calc(var(--glass-reflex-dark) * 20%), transparent),
    inset 0px 3px 4px -2px color-mix(in srgb, var(--c-dark) calc(var(--glass-reflex-dark) * 20%), transparent),
    inset 2px -6.5px 1px -4px color-mix(in srgb, var(--c-dark) calc(var(--glass-reflex-dark) * 10%), transparent),
    0px 10px 28px -16px color-mix(in srgb, var(--c-dark) calc(var(--glass-reflex-dark) * 22%), transparent),
    0px 26px 60px -35px color-mix(in srgb, var(--c-dark) calc(var(--glass-reflex-dark) * 26%), transparent);
  position: fixed;
  overflow: hidden;
  display: none;
}

.bottom-nav::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background: linear-gradient(to bottom, var(--nav-shine), transparent 60%);
  opacity: 0.75;
  border-radius: inherit;
}

.bottom-nav > *{ position: relative; }

.bottom-nav__pills{
  width: 100%;
  height: 100%;
  padding: 0;
  background: transparent;
  border: none;
  display: flex;
  gap: 8px;
  align-items: center;
  border-radius: 999px;
  align-items: center;
  justify-content: space-between;
}

.bottom-nav__pills .pill{
  flex: 1 1 0;
  font-size: 0.82rem;
  height: var(--pill-h);
  padding: 0 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

@media (max-width: 768px){

  .nav-left .pills{ display: none; }

  .bottom-nav{ display: block; }
}