/* ========================================
   iLink Glassmorphism Effects v4.3
   macOS Liquid Glass Style
   ======================================== */

/* === Base Glass Classes === */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
}

.glass-light {
  background: var(--glass-bg-light);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  border: 1px solid var(--glass-border);
}

.glass-strong {
  background: var(--glass-bg-strong);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  border: 1px solid var(--glass-border-strong);
  box-shadow: var(--glass-shadow);
}

/* Fallback for browsers without backdrop-filter support */
@supports not ((-webkit-backdrop-filter: blur(1px)) or (backdrop-filter: blur(1px))) {
  .glass,
  .glass-light,
  .glass-strong {
    background: rgba(255, 255, 255, 0.92);
  }
}

/* === Glass Hover Effects === */
.glass-hover {
  transition: all var(--transition-normal);
}

.glass-hover:hover {
  background: var(--glass-bg-strong);
  border-color: var(--glass-border-strong);
  transform: translateY(-2px);
  box-shadow: var(--glass-shadow), 0 12px 40px rgba(0, 0, 0, 0.1);
}

/* === Glass Panels === */
.glass-panel {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--glass-shadow);
  position: relative;
  overflow: hidden;
}

.glass-panel:hover {
  transform: translateY(-3px);
  box-shadow: var(--glass-shadow), 0 16px 48px rgba(0, 0, 0, 0.12);
}

/* === Glass Navigation === */
.glass-nav {
  background: var(--glass-bg-light);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  border-bottom: 1px solid var(--glass-border);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  transition: all var(--transition-normal);
}

.glass-nav.scrolled {
  background: var(--glass-bg-strong);
  box-shadow: var(--glass-shadow);
}

/* === Glass Cards === */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--glass-shadow);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--glass-shadow), 0 20px 50px rgba(0, 0, 0, 0.1);
  border-color: var(--glass-border-strong);
}

/* === Glass Buttons === */
.glass-btn {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-4);
  transition: all var(--transition-normal);
  cursor: pointer;
}

.glass-btn:hover {
  background: var(--glass-bg-strong);
  border-color: var(--glass-border-strong);
  transform: translateY(-2px);
  box-shadow: var(--glass-shadow);
}

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

/* === Glass Modal === */
.glass-modal {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  padding: var(--space-6);
}

.glass-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: calc(var(--z-modal) - 1);
  display: none;
}

.glass-modal-backdrop.show {
  display: block;
}

.glass-modal-content {
  background: var(--glass-bg-strong);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  border: 1px solid var(--glass-border-strong);
  border-radius: var(--radius-xl);
  box-shadow: var(--glass-shadow), var(--shadow-2xl);
  max-width: 560px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
}

/* === Glass Dropdown === */
.glass-dropdown {
  background: var(--glass-bg-strong);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--glass-shadow), var(--shadow-lg);
  overflow: hidden;
}

.glass-dropdown-item {
  padding: var(--space-3) var(--space-4);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.glass-dropdown-item:hover {
  background: var(--glass-bg-light);
}

/* === Glass Input === */
.glass-input {
  background: var(--glass-bg-light);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  transition: all var(--transition-fast);
}

.glass-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.1);
}

/* === Glass List === */
.glass-list {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.glass-list-item {
  padding: var(--space-4);
  border-bottom: 1px solid var(--glass-border);
  transition: all var(--transition-fast);
}

.glass-list-item:last-child {
  border-bottom: none;
}

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

/* === Glass Tab === */
.glass-tab {
  background: var(--glass-bg-light);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-4);
  transition: all var(--transition-normal);
  cursor: pointer;
}

.glass-tab:hover {
  background: var(--glass-bg);
}

.glass-tab.active {
  background: var(--glass-bg-strong);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* === Glass Progress === */
.glass-progress {
  background: var(--glass-bg-light);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  height: 8px;
  overflow: hidden;
}

.glass-progress-bar {
  height: 100%;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
}

/* === Glass Tooltip === */
.glass-tooltip {
  background: var(--glass-bg-strong);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  border: 1px solid var(--glass-border-strong);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-3);
  box-shadow: var(--glass-shadow), var(--shadow-md);
  font-size: var(--font-size-sm);
  position: absolute;
  z-index: var(--z-tooltip);
  pointer-events: none;
  opacity: 0;
  transform: translateY(4px);
  transition: all var(--transition-fast);
}

.glass-tooltip.visible {
  opacity: 1;
  transform: translateY(0);
}

/* === Glass Badge === */
.glass-badge {
  background: var(--glass-bg-strong);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  padding: 2px var(--space-3);
  font-size: var(--font-size-xs);
  font-weight: 500;
}

/* === Responsive Glass === */
@media (max-width: 768px) {
  .glass,
  .glass-light,
  .glass-strong,
  .glass-panel,
  .glass-card,
  .glass-modal-content {
    backdrop-filter: blur(12px) saturate(1.4);
    -webkit-backdrop-filter: blur(12px) saturate(1.4);
  }
}

/* === Reduced Motion === */
@media (prefers-reduced-motion: reduce) {
  .glass,
  .glass-light,
  .glass-strong,
  .glass-panel,
  .glass-card,
  .glass-btn,
  .glass-modal-content,
  .glass-dropdown,
  .glass-input,
  .glass-list-item,
  .glass-tab,
  .glass-progress-bar,
  .glass-tooltip {
    transition: none;
  }
  
  .glass-card:hover,
  .glass-btn:hover {
    transform: none;
  }
}

/* === Particle Canvas === */
.particle-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.5s ease;
}

/* 仅在标记了 data-particles="true" 的页面上显示粒子特效（首页 / 登录 / 注册） */
body[data-particles="true"] .particle-canvas {
  opacity: 0.6;
}

/* 登录 / 注册页：粒子位于装饰玻璃块之下、表单卡片之下 */
body[data-particles="true"] .particle-canvas--auth {
  opacity: 0.85;                       /* 覆盖父级 0.6，提升 auth 页粒子可见度 */
  transition: none;                    /* 禁止 opacity 渐变，避免 canvas 刚加载时全透明 */
}