/* ==========================================================================
   RESONATE LABS - Glassmorphism Components
   Matching iOS App glass effects from Theme/Gradients.swift
   ========================================================================== */

/* ===== Base Glass Panel ===== */
.glass {
  background: linear-gradient(
    135deg,
    var(--glass-medium) 0%,
    var(--glass-light) 100%
  );
  backdrop-filter: blur(var(--blur-lg));
  -webkit-backdrop-filter: blur(var(--blur-lg));
  border: 1px solid var(--glass-stroke);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  contain: layout style paint;
}

.glass--light {
  background: linear-gradient(
    135deg,
    var(--glass-light) 0%,
    rgba(255, 255, 255, 0.04) 100%
  );
}

.glass--strong {
  background: linear-gradient(
    180deg,
    var(--glass-strong) 0%,
    var(--glass-medium) 50%,
    var(--glass-light) 100%
  );
}

/* ===== Glass Card ===== */
.glass-card {
  background: linear-gradient(
    135deg,
    var(--glass-medium) 0%,
    var(--glass-light) 100%
  );
  backdrop-filter: blur(var(--blur-lg));
  -webkit-backdrop-filter: blur(var(--blur-lg));
  border: 1px solid var(--glass-stroke);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  contain: layout style;
  overflow: visible;
}

.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-floating);
}

.glass-card--clickable {
  cursor: pointer;
}

.glass-card--clickable:focus-visible {
  outline: 2px solid var(--neon-alpha);
  outline-offset: 2px;
}

/* ===== Glass Panel (Large) ===== */
.glass-panel {
  background: linear-gradient(
    135deg,
    var(--glass-medium) 0%,
    var(--glass-light) 100%
  );
  backdrop-filter: blur(var(--blur-xl));
  -webkit-backdrop-filter: blur(var(--blur-xl));
  border: 1px solid var(--glass-stroke);
  border-radius: var(--radius-2xl);
  padding: var(--space-2xl);
  box-shadow: var(--shadow-floating);
  contain: layout style paint;
}

/* ===== Glass Button ===== */
.glass-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  background: var(--glass-medium);
  backdrop-filter: blur(var(--blur-sm));
  -webkit-backdrop-filter: blur(var(--blur-sm));
  border: 1px solid var(--glass-stroke);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  font-weight: var(--font-medium);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
}

.glass-button:hover {
  background: var(--glass-strong);
  border-color: rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
}

.glass-button:active {
  transform: translateY(0);
}

.glass-button:focus-visible {
  outline: 2px solid var(--neon-alpha);
  outline-offset: 2px;
}

/* ===== Glass Badge ===== */
.glass-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-md);
  background: var(--glass-medium);
  backdrop-filter: blur(var(--blur-sm));
  -webkit-backdrop-filter: blur(var(--blur-sm));
  border: 1px solid var(--glass-stroke);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  color: var(--text-secondary);
}

.glass-badge--coming-soon {
  background: linear-gradient(135deg, var(--glass-strong), var(--glass-medium));
  color: var(--text-primary);
}

/* ===== Brainwave State Cards ===== */
.brainwave-card {
  position: relative;
  background: linear-gradient(
    135deg,
    var(--glass-medium) 0%,
    var(--glass-light) 100%
  );
  backdrop-filter: blur(var(--blur-lg));
  -webkit-backdrop-filter: blur(var(--blur-lg));
  border: 1px solid var(--glass-stroke);
  border-radius: var(--radius-xl);
  padding: var(--space-lg);
  cursor: pointer;
  transition: all var(--transition-base);
  overflow: hidden;
  contain: layout style paint;
}

.brainwave-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--card-color, var(--neon-alpha));
  opacity: 0.8;
  transition: height var(--transition-base);
}

.brainwave-card:hover {
  transform: translateY(-4px);
  border-color: var(--card-color, var(--neon-alpha));
}

.brainwave-card:hover::before {
  height: 4px;
}

.brainwave-card.active {
  border-color: var(--card-color, var(--neon-alpha));
  box-shadow: var(--card-glow, var(--glow-alpha));
}

.brainwave-card.active::before {
  height: 4px;
  opacity: 1;
}

/* Card Color Variants */
.brainwave-card--delta {
  --card-color: var(--neon-delta);
  --card-glow: var(--glow-delta);
}

.brainwave-card--theta {
  --card-color: var(--neon-theta);
  --card-glow: var(--glow-theta);
}

.brainwave-card--alpha {
  --card-color: var(--neon-alpha);
  --card-glow: var(--glow-alpha);
}

.brainwave-card--beta {
  --card-color: var(--neon-beta);
  --card-glow: var(--glow-beta);
}

.brainwave-card--gamma {
  --card-color: var(--neon-gamma);
  --card-glow: var(--glow-gamma);
}

.brainwave-card__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--card-color, var(--neon-alpha));
  opacity: 0.2;
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.brainwave-card__title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

.brainwave-card__range {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--card-color, var(--neon-alpha));
  margin-bottom: var(--space-sm);
}

.brainwave-card__description {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
}

/* ===== Edge Lighting Effect ===== */
.glass-edge-light {
  position: relative;
  overflow: hidden;
}

.glass-edge-light::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: conic-gradient(
    from 0deg,
    rgba(255, 255, 255, 0.3),
    transparent,
    rgba(255, 255, 255, 0.1),
    transparent
  );
  filter: blur(2px);
  opacity: 0.2;
  pointer-events: none;
  animation: rotate-edge 10s linear infinite;
}

@keyframes rotate-edge {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

/* ===== Frosted Glass Input ===== */
.glass-input {
  background: var(--glass-light);
  backdrop-filter: blur(var(--blur-sm));
  -webkit-backdrop-filter: blur(var(--blur-sm));
  border: 1px solid var(--glass-stroke);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.glass-input:focus {
  background: var(--glass-medium);
  border-color: var(--neon-alpha);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.glass-input::placeholder {
  color: var(--text-placeholder);
}

/* ===== Fallback for No Backdrop Filter ===== */
@supports not (backdrop-filter: blur(1px)) {
  .glass,
  .glass-card,
  .glass-panel,
  .glass-button,
  .glass-badge,
  .brainwave-card,
  .glass-input {
    background: rgba(26, 32, 40, 0.95);
  }
}

/* ===== Reduced Motion ===== */
@media (prefers-reduced-motion: reduce) {
  .glass-card:hover,
  .glass-button:hover,
  .brainwave-card:hover {
    transform: none;
  }

  .glass-edge-light::after {
    animation: none;
  }
}

/* ===== Mobile Performance ===== */
@media (max-width: 768px) {
  .glass,
  .glass-card,
  .glass-panel,
  .brainwave-card {
    backdrop-filter: blur(var(--blur-md));
    -webkit-backdrop-filter: blur(var(--blur-md));
  }

  .glass-button,
  .glass-badge,
  .glass-input {
    backdrop-filter: blur(var(--blur-sm));
    -webkit-backdrop-filter: blur(var(--blur-sm));
  }
}