/**
 * Glassmorphism CSS
 * グラスモーフィズム共通スタイル
 */

/* ============================================
   Glass Card Base
   ============================================ */

.c-card--glass {
  position: relative;
  background: #fff;
  border-radius: var(--radius-card);
  border: var(--hairline);
  box-shadow: var(--shadow-1);
  overflow: hidden;
}

/* ============================================
   Glass Variants
   ============================================ */

/* Dark Glass */
.c-card--glass-dark {
  background: rgba(11, 18, 32, 0.4);
  border: var(--hairline-light);
}

/* Light Glass */
.c-card--glass-light {
  background: rgba(255, 255, 255, 0.1);
  border: var(--hairline-light);
}

/* Enhanced Glass (subtle accent shadow) */
.c-card--glass-glow {
  box-shadow: var(--shadow-2);
}

.c-card--glass-glow:hover {
  box-shadow: var(--shadow-3);
}

/* ============================================
   Glass Effects
   ============================================ */

/* Frosted Glass Effect */
.glass-frosted {
  backdrop-filter: blur(30px) saturate(180%);
  -webkit-backdrop-filter: blur(30px) saturate(180%);
  background: rgba(255, 255, 255, 0.03);
}

/* Shimmer Effect on Glass */
.glass-shimmer {
  position: relative;
  overflow: hidden;
}

.glass-shimmer::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(
    to right,
    transparent,
    rgba(255, 255, 255, 0.1) 50%,
    transparent
  );
  animation: shimmer 3s infinite;
  pointer-events: none;
}

/* Floating Glass */
.glass-floating {
  animation: float 6s ease-in-out infinite;
}

/* ============================================
   Glass Border Effects
   ============================================ */

/* Gradient Border */
.glass-border-gradient {
  position: relative;
  background-clip: padding-box;
}

.glass-border-gradient::before {
  content: '';
  position: absolute;
  inset: 0;
  padding: 1px;
  border-radius: inherit;
  background: linear-gradient(135deg, #00e5ff, #007a8a, #006064);
  -webkit-mask:
    linear-gradient(#fff 0 0) content-box,
    linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0.3;
  transition: opacity 0.3s;
}

.glass-border-gradient:hover::before {
  opacity: 1;
}

/* ============================================
   Glass Button
   ============================================ */

.c-btn--glass {
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: var(--hairline-light);
  color: var(--color-text-white);
  box-shadow: var(--shadow-1);
  transition: all var(--transition-base);
}

.c-btn--glass::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.05);
  opacity: 0;
  transition: opacity var(--transition-base);
  pointer-events: none;
}

.c-btn--glass:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(0, 179, 201, 0.3);
  box-shadow: var(--shadow-2);
  transform: translateY(-2px);
}

.c-btn--glass:hover::before {
  opacity: 1;
}

/* ============================================
   Glass Panel
   ============================================ */

.glass-panel {
  background: rgba(255, 255, 255, 0.02);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  border: var(--hairline-light);
  border-radius: 16px;
  padding: 32px;
  box-shadow: var(--shadow-1);
}

/* ============================================
   Responsive & Accessibility
   ============================================ */

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  .glass-floating,
  .c-btn--glass {
    animation: none;
    transition: none;
  }
}

/* Fallback for browsers without backdrop-filter */
@supports not (backdrop-filter: blur(20px)) {
  .glass-frosted,
  .c-btn--glass,
  .glass-panel {
    background: rgba(255, 255, 255, 0.15);
  }

  .c-card--glass-dark {
    background: rgba(11, 18, 32, 0.6);
  }
}