/**
 * GoTryTech Premium Glassmorphism Utilities
 * 
 * Feeling: Frontend Masters × Linear × Vercel Docs
 * Contains core utility classes for glass layouts, active card backdrops,
 * and overlay sheets utilizing HSL variables and blur tokens.
 */

/* Standard Glass Panel (C-01) */
.gtt-glass {
  background: var(--glass-surface);
  backdrop-filter: var(--glass-blur-md);
  -webkit-backdrop-filter: var(--glass-blur-md);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  border-radius: var(--radius-card);
  transition: var(--transition-card);
}

/* Elevated Strong Glass (Modals, dropdown panels, overlays) */
.gtt-glass--strong {
  background: var(--glass-surface-2);
  backdrop-filter: var(--glass-blur-lg);
  -webkit-backdrop-filter: var(--glass-blur-lg);
  border: 1px solid var(--border-medium);
  box-shadow: var(--shadow-xl);
  border-radius: var(--radius-panel);
}

/* Interactive Hover state for pure glass elements */
.gtt-glass--interactive {
  cursor: pointer;
  transition: var(--transition-all);
}
.gtt-glass--interactive:hover {
  background: var(--bg-glass-light);
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow-sm), var(--glass-shadow);
  transform: translateY(-2px);
}

/* Subtle glowing accent highlight */
.gtt-glow-border {
  position: relative;
}
.gtt-glow-border::after {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, var(--green-500), transparent 50%, var(--cyan-500));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
  opacity: 0.15;
  transition: opacity var(--duration-normal) var(--ease-out);
}
.gtt-glow-border:hover::after {
  opacity: 0.45;
}