/**
 * LIQUID GLASS COMPONENTS — materiali vetro stile Apple
 *
 * Ogni lastra di vetro = 4 ingredienti:
 * 1. background traslucido NEUTRO
 * 2. backdrop-filter: blur alto + saturate(180%)
 * 3. bordo sottile + riflesso speculare interno in alto (--glass-highlight)
 * 4. ombra stratificata (contatto + ambiente)
 * Movimento: solo al press (scale 0.97), mai "salti" all'hover.
 */

/* GLASS CARD BASE */
.glass-card {
  background: var(--glass-primary);
  backdrop-filter: var(--blur-glass) var(--saturate-glass);
  -webkit-backdrop-filter: var(--blur-glass) var(--saturate-glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--glass-highlight), var(--shadow-md);
  padding: 1.5rem;
  transition: border-color var(--duration-normal) var(--easing-smooth),
              box-shadow var(--duration-normal) var(--easing-smooth);
}

.glass-card:hover {
  border-color: var(--glass-border-hover);
}

.glass-card:active {
  transform: scale(0.995);
}

.glass-card-light {
  background: var(--glass-secondary);
  backdrop-filter: var(--blur-glass) var(--saturate-glass);
  -webkit-backdrop-filter: var(--blur-glass) var(--saturate-glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--glass-highlight), var(--shadow-sm);
}

.glass-card-light:hover {
  border-color: var(--glass-border-hover);
}

/* BUTTONS */
.btn-primary {
  padding: 0.8rem 1.5rem;
  border: none;
  border-radius: var(--radius-md);
  background: linear-gradient(180deg,
    color-mix(in srgb, var(--primary) 88%, white 12%) 0%,
    var(--primary) 100%);
  color: white;
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: -0.01em;
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.30),
              0 8px 20px -8px color-mix(in srgb, var(--primary) 65%, transparent);
  transition: transform var(--duration-fast) var(--easing-smooth),
              filter var(--duration-fast) var(--easing-smooth);
}

.btn-primary:hover {
  filter: brightness(1.06);
}

.btn-primary:active {
  transform: scale(0.97);
  filter: brightness(0.96);
}

.btn-ghost {
  padding: 0.8rem 1.5rem;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: background var(--duration-fast) var(--easing-smooth),
              transform var(--duration-fast) var(--easing-smooth);
}

.btn-ghost:hover {
  background: var(--glass-secondary);
}

.btn-ghost:active {
  transform: scale(0.97);
}

.btn-secondary {
  padding: 0.8rem 1.5rem;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  background: var(--glass-secondary);
  color: var(--text-primary);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  backdrop-filter: var(--blur-glass) var(--saturate-glass);
  -webkit-backdrop-filter: var(--blur-glass) var(--saturate-glass);
  box-shadow: var(--glass-highlight);
  transition: background var(--duration-fast) var(--easing-smooth),
              transform var(--duration-fast) var(--easing-smooth);
}

.btn-secondary:hover {
  background: var(--glass-primary);
}

.btn-secondary:active {
  transform: scale(0.97);
}

/* MODALS — backdrop pesante, lastra spessa */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(5, 7, 14, 0.45);
  backdrop-filter: blur(20px) saturate(120%);
  -webkit-backdrop-filter: blur(20px) saturate(120%);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  animation: fadeIn var(--duration-normal) var(--easing-smooth);
}

html[data-theme="light"] .modal-overlay {
  background: rgba(40, 48, 80, 0.25);
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeOut {
  from { opacity: 1; }
  to { opacity: 0; }
}

.modal-content {
  background: var(--glass-thick, var(--glass-primary));
  backdrop-filter: blur(48px) var(--saturate-glass);
  -webkit-backdrop-filter: blur(48px) var(--saturate-glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: 2rem;
  max-width: min(90vw, 500px);
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--glass-highlight-strong), var(--shadow-lg);
  animation: slideUp var(--duration-slow) var(--easing-smooth);
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(24px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes slideDown {
  from { opacity: 1; transform: translateY(0); }
  to { opacity: 0; transform: translateY(24px); }
}

/* NAVBAR (topbar) */
.navbar {
  background: color-mix(in srgb, var(--glass-primary) 80%, transparent);
  backdrop-filter: var(--blur-glass) var(--saturate-glass);
  -webkit-backdrop-filter: var(--blur-glass) var(--saturate-glass);
  border-bottom: 1px solid var(--glass-border);
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 50;
}

/* LIST ITEMS */
.list-item {
  padding: 1rem;
  background: var(--glass-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  margin-bottom: 0.75rem;
  box-shadow: var(--glass-highlight);
  transition: background var(--duration-fast) var(--easing-smooth);
}

.list-item:hover {
  background: var(--glass-primary);
}

/* BADGES */
.badge {
  display: inline-block;
  padding: 0.35rem 0.75rem;
  border-radius: 99px;
  font-size: 0.85rem;
  font-weight: 600;
  background: color-mix(in srgb, var(--primary) 18%, transparent);
  color: var(--primary);
  border: 1px solid color-mix(in srgb, var(--primary) 25%, transparent);
}

.badge-secondary {
  background: var(--glass-secondary);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
}

/* UTILITIES */
.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }
.text-accent { color: var(--primary); }

.glass-card-elevated {
  box-shadow: var(--glass-highlight), var(--shadow-md);
}

.glass-card-floating {
  box-shadow: var(--glass-highlight-strong), var(--shadow-lg);
}

@media (max-width: 640px) {
  .glass-card { padding: 1rem; }
  .modal-content { padding: 1.5rem; max-width: 95vw; }
  .btn-primary, .btn-secondary, .btn-ghost {
    padding: 0.7rem 1.25rem;
    font-size: 0.95rem;
  }
}