/* ==========================================================================
   REACT BITS: GlassSurface Component CSS
   Hyper-realistic chromatic dispersion & liquid glass refraction
   ========================================================================== */

.glass-surface {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  cursor: pointer;
  text-decoration: none;
  font-family: inherit;
  border: none;
  box-sizing: border-box;
  transform: translateZ(0);
  will-change: background, border-color, box-shadow;
  backdrop-filter: blur(14px) saturate(1.4) brightness(1.05);
  -webkit-backdrop-filter: blur(14px) saturate(1.4) brightness(1.05);
  transition: background 380ms cubic-bezier(0.16, 1, 0.3, 1),
              border-color 380ms cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow 380ms cubic-bezier(0.16, 1, 0.3, 1),
              transform 140ms ease;
}

/* Fluid specular light bloom overlay */
.glass-surface::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  background: radial-gradient(circle at 50% -10%, rgba(255, 255, 255, 0.25) 0%, rgba(255, 255, 255, 0.05) 50%, transparent 80%);
  opacity: 0;
  transition: opacity 380ms cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 2;
}

.glass-surface:hover::before {
  opacity: 1;
}

.glass-surface__filter {
  width: 100%;
  height: 100%;
  pointer-events: none;
  position: absolute;
  inset: 0;
  opacity: 0;
  z-index: -1;
}

.glass-surface__content {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 16px;
  border-radius: inherit;
  position: relative;
  z-index: 3;
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: -0.01em;
  white-space: nowrap;
  pointer-events: none;
  transition: color 380ms cubic-bezier(0.16, 1, 0.3, 1),
              text-shadow 380ms cubic-bezier(0.16, 1, 0.3, 1);
}

.glass-surface--svg {
  background: rgba(255, 255, 255, var(--glass-frost, 0.08));
  backdrop-filter: var(--filter-id, url(#glass-filter)) saturate(var(--glass-saturation, 1.3));
  -webkit-backdrop-filter: var(--filter-id, url(#glass-filter)) saturate(var(--glass-saturation, 1.3));
  border: 1px solid rgba(255, 255, 255, 0.45);
  box-shadow:
    0 0 2px 1px rgba(255, 255, 255, 0.65) inset,
    0 0 12px 2px rgba(255, 255, 255, 0.35) inset,
    0 1px 2px rgba(255, 255, 255, 0.85) inset,
    0 -1px 2px rgba(0, 0, 0, 0.15) inset,
    0px 4px 16px rgba(17, 17, 26, 0.12),
    0px 8px 30px rgba(17, 17, 26, 0.10);
}

/* Primary Glass Button Variant (Obsidian/Smoked Liquid Glass with Refraction) */
.glass-surface.btn-primary,
.glass-surface.btn-secondary {
  width: auto;
  min-width: 160px;
  height: 40px;
  padding: 0 20px;
  border-radius: 9999px;
  background: rgba(18, 18, 24, 0.32);
  backdrop-filter: blur(14px) saturate(1.4) brightness(1.05);
  -webkit-backdrop-filter: blur(14px) saturate(1.4) brightness(1.05);
  border: 1px solid rgba(255, 255, 255, 0.45);
  box-shadow:
    0 0 2px 1px rgba(255, 255, 255, 0.55) inset,
    0 0 12px 2px rgba(255, 255, 255, 0.18) inset,
    0 1.5px 2px rgba(255, 255, 255, 0.75) inset,
    0 -1px 1px rgba(0, 0, 0, 0.4) inset,
    0px 4px 16px rgba(0, 0, 0, 0.22),
    0px 8px 32px rgba(0, 0, 0, 0.18);
}

.glass-surface.btn-primary .glass-surface__content,
.glass-surface.btn-secondary .glass-surface__content {
  color: #ffffff;
  font-weight: 550;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.75), 0 0 2px rgba(0, 0, 0, 0.85);
}

.glass-surface.btn-primary:hover,
.glass-surface.btn-secondary:hover {
  background: rgba(26, 24, 32, 0.48);
  border-color: rgba(255, 255, 255, 0.72);
  box-shadow:
    0 0 2px 1px rgba(255, 255, 255, 0.85) inset,
    0 0 16px 4px rgba(255, 255, 255, 0.30) inset,
    0 1.5px 2px rgba(255, 255, 255, 0.95) inset,
    0 -1px 1px rgba(0, 0, 0, 0.4) inset,
    0px 6px 20px rgba(0, 0, 0, 0.28),
    0px 12px 40px rgba(0, 0, 0, 0.24);
  color: #ffffff;
  transform: translateY(-1px);
}

.glass-surface.btn-primary:active,
.glass-surface.btn-secondary:active {
  transform: scale(0.985);
  box-shadow:
    0 0 1px 1px rgba(255, 255, 255, 0.45) inset,
    0 0 8px 1px rgba(255, 255, 255, 0.12) inset,
    0 1px 1.5px rgba(255, 255, 255, 0.6) inset,
    0 -1px 1px rgba(0, 0, 0, 0.4) inset,
    0px 2px 10px rgba(0, 0, 0, 0.20),
    0px 4px 18px rgba(0, 0, 0, 0.15);
}

/* Fallback for non-SVG filter browsers */
.glass-surface--fallback {
  background: rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(12px) saturate(1.8) brightness(1.1);
  -webkit-backdrop-filter: blur(12px) saturate(1.8) brightness(1.1);
  border: 1px solid rgba(255, 255, 255, 0.3);
  box-shadow:
    0 8px 32px 0 rgba(31, 38, 135, 0.2),
    0 2px 16px 0 rgba(31, 38, 135, 0.1),
    inset 0 1px 0 0 rgba(255, 255, 255, 0.4),
    inset 0 -1px 0 0 rgba(255, 255, 255, 0.2);
}

.glass-surface:focus-visible {
  outline: 2px solid #007aff;
  outline-offset: 2px;
}