/* ============================================
   Reusable Components - 通用组件
   ============================================ */

/* ---- 按钮样式 ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
  transition: all var(--duration-fast) var(--ease-out);
  cursor: pointer;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #fff;
  box-shadow: 0 4px 12px rgba(var(--color-primary-rgb), 0.35);
}

.btn-primary:active {
  transform: scale(0.96);
  opacity: 0.9;
}

.btn-outline {
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.btn-gold {
  background: var(--vip-gradient);
  color: #000;
  font-weight: var(--font-weight-bold);
}

.icon-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: var(--text-primary);
  transition: background var(--duration-fast);
}

.icon-btn:active {
  background: rgba(255,255,255,0.12);
}

/* ---- Toast 提示 ---- */
.toast-container {
  position: fixed;
  top: 80px;
  left: 50%;
  transform: translateX(-50%);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  background: rgba(30, 30, 30, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  color: var(--text-primary);
  padding: 10px 20px;
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  text-align: center;
  max-width: 280px;
  animation: toast-in 0.3s ease forwards;
  pointer-events: auto;
  border: 1px solid var(--border-color);
}

@keyframes toast-in {
  from { opacity: 0; transform: translateY(-16px); }
  to   { opacity: 1; transform: translateY(0); }
}

.toast.hiding {
  animation: toast-out 0.25s ease forwards;
}

@keyframes toast-out {
  from { opacity: 1; transform: translateY(0); }
  to   { opacity: 0; transform: translateY(-16px); }
}

/* ---- Loading 骨架屏 ---- */
.skeleton {
  background: linear-gradient(90deg,
    var(--bg-card) 25%,
    var(--bg-card-hover) 50%,
    var(--bg-card) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s ease infinite;
  border-radius: var(--radius-md);
}

@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ---- 空状态 ---- */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px var(--space-xl);
  text-align: center;
}

.empty-icon {
  font-size: 48px;
  margin-bottom: var(--space-lg);
  opacity: 0.5;
}

.empty-text {
  font-size: var(--font-size-md);
  color: var(--text-muted);
}