/* ===================================
   LIQUID GLASS DESIGN SYSTEM
   Apple-inspired glassmorphism
   =================================== */

:root {
  /* Glass effect variables */
  --glass-blur: 40px;
  --glass-saturation: 180%;
  --glass-brightness: 110%;
  --glass-border: 1px solid rgba(255, 255, 255, 0.18);
  --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);

  /* Glass tints */
  --glass-white: rgba(255, 255, 255, 0.1);
  --glass-dark: rgba(0, 0, 0, 0.1);
}

/* Base glass effect */
.glass {
  background: var(--glass-white);
  border: var(--glass-border);
}

/* Glass variants */
.glass-light {
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.25);
}

.glass-dark {
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.glass-heavy {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.glass-subtle {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

/* Glass border effects */
.glass-border-gradient {
  position: relative;
  border: 2px solid transparent;
  background-clip: padding-box;
}

.glass-border-gradient::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: -1;
  margin: -2px;
  border-radius: inherit;
  background: linear-gradient(135deg,
    rgba(255, 255, 255, 0.4) 0%,
    rgba(255, 255, 255, 0.1) 50%,
    rgba(255, 255, 255, 0.4) 100%);
}

/* Frosted glass effect */
.glass-frosted {
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

/* Glass shine effect - disabled for performance */
.glass-shine {
  position: relative;
  overflow: hidden;
}

/* Glass hover effects */
.glass-hover:hover {
  background: rgba(255, 255, 255, 0.18);
  border-color: rgba(255, 255, 255, 0.3);
}

/* Glass button */
.glass-button {
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.4);
  padding: 14px 32px;
  border-radius: 16px;
  font-weight: 600;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  color: #ffffff;
}

.glass-button:hover {
  background: rgba(255, 255, 255, 0.25);
  border-color: rgba(255, 255, 255, 0.6);
}

.glass-button:active {
  background: rgba(255, 255, 255, 0.2);
}

/* Glass card */
.glass-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 24px;
  padding: 32px;
}

.glass-card:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.4);
}

/* Glass input */
.glass-input {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 12px;
  padding: 14px 18px;
  color: #ffffff;
  font-size: 16px;
  width: 100%;
}

.glass-input::placeholder {
  color: rgba(255, 255, 255, 0.6);
}

.glass-input:focus {
  outline: none;
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.6);
}

/* Glow effect - disabled */
.glass-glow {
}

/* Glass overlay */
.glass-overlay {
  background: rgba(0, 0, 0, 0.4);
}

/* Responsive adjustments */
@media (max-width: 768px) {
  :root {
    --glass-blur: 30px;
    --glass-saturation: 150%;
  }

  .glass-card {
    padding: 24px;
    border-radius: 20px;
  }

  .glass-button {
    padding: 12px 24px;
    border-radius: 12px;
  }
}

/* Performance optimization for mobile */
@media (max-width: 640px) {
  .glass-card {
    padding: 24px;
    border-radius: 20px;
  }

  .glass-button {
    padding: 12px 24px;
    border-radius: 12px;
  }
}