/* =========================================================
   XINAN OS 2.0 — Common Components
   通用组件样式：空状态、加载动画、tooltip 等
   ========================================================= */

/* ===== 数字滚动动画 ===== */
.count-up {
  display: inline-block;
  font-variant-numeric: tabular-nums;
}

/* ===== 加载动画（品牌金色） ===== */
.loading-spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border-light, #2a2a38);
  border-top-color: var(--gold, #d4a853);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.loading-spinner.sm {
  width: 20px;
  height: 20px;
  border-width: 2px;
}

.loading-spinner.lg {
  width: 48px;
  height: 48px;
  border-width: 4px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* 品牌加载遮罩 */
.page-loading {
  position: fixed;
  inset: 0;
  background: var(--bg-primary, #0a0a0f);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  z-index: 9999;
  transition: opacity 0.4s ease, visibility 0.4s ease;
}

.page-loading.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.page-loading-logo {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--gold, #d4a853), var(--gold-dark, #b8933f));
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #0a0a0f;
  font-weight: 700;
  font-size: 24px;
  animation: loading-pulse 1.5s ease-in-out infinite;
}

@keyframes loading-pulse {
  0%, 100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(212, 168, 83, 0.4); }
  50% { transform: scale(1.05); box-shadow: 0 0 0 12px rgba(212, 168, 83, 0); }
}

.page-loading-text {
  font-size: 13px;
  color: var(--text-tertiary, #6a6a7a);
  font-family: var(--font-mono, monospace);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.page-loading-bar {
  width: 120px;
  height: 2px;
  background: var(--border-light, #2a2a38);
  border-radius: 2px;
  overflow: hidden;
}

.page-loading-bar::after {
  content: '';
  display: block;
  width: 40%;
  height: 100%;
  background: var(--gold, #d4a853);
  border-radius: 2px;
  animation: loading-bar 1.5s ease-in-out infinite;
}

@keyframes loading-bar {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(300%); }
}

/* ===== 空状态 ===== */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 48px 24px;
  text-align: center;
  color: var(--text-tertiary, #6a6a7a);
}

.empty-state-icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  background: var(--bg-card, #13131c);
  border: 1px solid var(--border-light, #2a2a38);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted, #4a4a5a);
  margin-bottom: 16px;
}

.empty-state-icon svg {
  width: 28px;
  height: 28px;
}

.empty-state-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-secondary, #a0a0b0);
  margin-bottom: 6px;
}

.empty-state-desc {
  font-size: 13px;
  color: var(--text-tertiary, #6a6a7a);
  max-width: 280px;
  line-height: 1.6;
}

.empty-state-action {
  margin-top: 20px;
  padding: 8px 20px;
  border: 1px solid var(--border-gold, rgba(212, 168, 83, 0.3));
  border-radius: var(--radius-sm, 6px);
  color: var(--gold, #d4a853);
  font-size: 13px;
  cursor: pointer;
  background: transparent;
  transition: all 0.2s ease;
}

.empty-state-action:hover {
  background: var(--gold-soft, rgba(212, 168, 83, 0.1));
  border-color: var(--gold, #d4a853);
}

/* ===== 侧边栏折叠态 Tooltip ===== */
.sidebar .nav-item .nav-tooltip {
  position: absolute;
  left: calc(100% + 8px);
  top: 50%;
  transform: translateY(-50%) translateX(-4px);
  padding: 6px 10px;
  background: var(--bg-elevated, #1c1c28);
  border: 1px solid var(--border-light, #2a2a38);
  border-radius: 6px;
  color: var(--text-primary, #f0f0f5);
  font-size: 12px;
  font-weight: 500;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: all 0.15s var(--ease, ease);
  z-index: 200;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

.sidebar .nav-item .nav-tooltip::before {
  content: '';
  position: absolute;
  left: -4px;
  top: 50%;
  transform: translateY(-50%) rotate(45deg);
  width: 8px;
  height: 8px;
  background: var(--bg-elevated, #1c1c28);
  border-left: 1px solid var(--border-light, #2a2a38);
  border-bottom: 1px solid var(--border-light, #2a2a38);
}

/* 仅在折叠态（非 hover、非 expanded）显示 tooltip */
.sidebar:not(:hover):not(.expanded) .nav-item:hover .nav-tooltip {
  opacity: 1;
  visibility: visible;
  transform: translateY(-50%) translateX(0);
}

/* 徽章 tooltip 特殊样式 */
.sidebar .nav-item .nav-tooltip .tooltip-badge {
  margin-left: 8px;
  padding: 1px 6px;
  background: var(--bg-card, #13131c);
  border-radius: 10px;
  font-size: 10px;
  color: var(--text-tertiary, #6a6a7a);
  font-family: var(--font-mono, monospace);
}

.sidebar .nav-item .nav-tooltip .tooltip-badge.live {
  background: var(--green-soft, rgba(16, 185, 129, 0.1));
  color: var(--green, #10b981);
}

/* ===== 页面进入动画 ===== */
.page-enter {
  animation: page-enter 0.4s cubic-bezier(0.4, 0, 0.2, 1) both;
}

@keyframes page-enter {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Stagger 延迟工具类 */
.page-enter.delay-1 { animation-delay: 0.05s; }
.page-enter.delay-2 { animation-delay: 0.1s; }
.page-enter.delay-3 { animation-delay: 0.15s; }
.page-enter.delay-4 { animation-delay: 0.2s; }
.page-enter.delay-5 { animation-delay: 0.25s; }
.page-enter.delay-6 { animation-delay: 0.3s; }

/* ===== Skeleton 骨架屏 ===== */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--bg-card, #13131c) 25%,
    var(--bg-elevated, #1c1c28) 50%,
    var(--bg-card, #13131c) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.5s ease-in-out infinite;
  border-radius: 4px;
}

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