:root {
  --glass-bg: rgba(255, 255, 255, 0.18);
  --glass-border: rgba(255, 255, 255, 0.55);
  --glass-shadow-outer: rgba(100, 100, 180, 0.18);
  --glass-shadow-inner: rgba(255, 255, 255, 0.7);
  --glass-bottom-light: rgba(160, 180, 255, 0.22);
  --pill-bg: rgba(255, 255, 255, 0.72);
  --pill-shadow: rgba(80, 100, 200, 0.18);
  --icon-color: rgba(30, 30, 60, 0.6);
  --active-icon: rgba(20, 20, 50, 1);
  --divider: rgba(80, 80, 120, 0.18);
  --spring: cubic-bezier(0.34, 1.2, 0.64, 1);
}

#glCanvas {
  position: fixed !important;
  top: 0;
  left: 0;
  width: 100vw !important;
  height: 100vh !important;
  z-index: -1;
  pointer-events: none;
}

.icon {
  height: 40px;
  width: 40px;
  fill: currentColor;
  display: inline-block;
  flex-shrink: 0;
  transition: transform 0.3s var(--spring), fill 0.3s ease;
}

#filterNav {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 8px 10px;
    border-radius: 9999px;
    backdrop-filter: blur(52px) saturate(210%) brightness(1.04);
    -webkit-backdrop-filter: blur(52px) saturate(210%) brightness(1.04);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    box-shadow:
      0 20px 60px -8px var(--glass-shadow-outer),
      0 8px 24px -4px var(--glass-shadow-outer),
      0 2px 0 0 var(--glass-bottom-light),
      inset 0 -1px 0 0 rgba(100, 120, 255, 0.08);
    transition:
      background 0.6s ease,
      border-color 0.6s ease,
      box-shadow 0.6s ease;
}

#filterNav::before {
    content: '';
    position: absolute;
    top: 1px; left: 1px; right: 1px;
    height: 48%;
    border-radius: 9999px 9999px 60% 60% / 9999px 9999px 80% 80%;
    background: linear-gradient(
      180deg,
      rgba(255,255,255,0.40) 0%,
      rgba(255,255,255,0.20) 55%,
      rgba(255,255,255,0.00) 100%
    );
    pointer-events: none;
    z-index: 1;
    transition: opacity 0.6s ease;
}

#filterNav::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 9999px;
    background: radial-gradient(
      circle 80px at var(--mx, 50%) var(--my, 50%),
      rgba(255,255,255,0.22) 0%,
      transparent 70%
    );
    mix-blend-mode: overlay;
    pointer-events: none;
    z-index: 2;
    transition: background 0.05s linear;
}

#pill {
    position: absolute;
    top: 8px;
    left: 0;
    height: calc(100% - 16px);
    border-radius: 9999px;
    background: var(--pill-bg);
    box-shadow:
      0 4px 16px -2px var(--pill-shadow),
      inset 0 1px 0 rgba(255,255,255,0.9),
      inset 0 -1px 0 rgba(0,0,20,0.06);
    transition:
      transform 0.48s var(--spring),
      width 0.48s var(--spring),
      background 0.5s ease,
      box-shadow 0.5s ease;
    pointer-events: none;
    z-index: 3;
}

.nav-btn {
    position: relative;
    z-index: 4;
    display: flex;
    align-items: center;
    gap: 0;
    padding: 9px 18px;
    border-radius: 9999px;
    border: none;
    background: transparent;
    cursor: pointer;
    color: var(--icon-color);
    font-family: 'Poppins', sans-serif;
    font-size: 13.5px;
	text-transform: uppercase;
    font-weight: 400;
    white-space: nowrap;
    transition: color 0.3s ease, transform 0.15s ease;
    user-select: none;
}

.nav-btn span {
    display: inline-block;
    max-width: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-width 0.48s var(--spring), opacity 0.3s ease;
    margin-left: 0;
}

.nav-btn.active span {
    max-width: 150px; 
    opacity: 1;
    margin-left: 7px;
}

@media screen and (min-width: 600px) {
    .nav-btn span {
        max-width: 150px;
        opacity: 1;
        margin-left: 7px;
    }
}

.nav-btn.active {
    color: var(--active-icon);
}

@media screen and (max-width: 699px) {
	.nav-btn {
		font-size: 12px;
		padding: 9px 14px;
	}
    .nav-btn span {
        max-width: 0;
        opacity: 0;
        margin-left: 0;
    }
    .icon {
        height: 40px;
        width: 40px;
    }
	
	.nav-btn .icon {
        height: 30px;
        width: 30px;
	}
}

@media screen and (max-width: 450px) {	
	.nav-btn .icon {
        height: 20px;
        width: 20px;
	}
}

.nav-btn:active {
    transform: scale(0.92);
}

.nav-btn:active .icon {
    transform: scale(0.88);
}

.divider {
    width: 1px;
    height: 26px;
    background: var(--divider);
    border-radius: 1px;
    margin: 0 4px;
    flex-shrink: 0;
    transition: background 0.6s ease;
    position: relative;
    z-index: 4;
}