/**
 * Center Placeholder Styles
 * 中间区域占位页面样式
 */

/* 占位页面容器 */
.center-placeholder {
  display: none; /* 默认隐藏 */
  width: 100%;
  height: 100%;
  background: var(--bg-primary, #0d1117);
  align-items: center;
  justify-content: center;
  padding: 40px;
}

/* 占位内容 */
.placeholder-content {
  text-align: center;
  max-width: 500px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

/* 占位图标 */
.placeholder-icon {
  font-size: 80px;
  line-height: 1;
  opacity: 0.8;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

/* 占位标题 */
.placeholder-title {
  font-size: 24px;
  font-weight: 600;
  color: var(--text-primary, #c9d1d9);
  margin: 0;
}

/* 占位描述 */
.placeholder-desc {
  font-size: 14px;
  color: var(--text-secondary, #8b949e);
  margin: 0;
  line-height: 1.6;
}

/* 返回按钮 */
.btn-back-to-chart {
  margin-top: 20px;
  padding: 10px 20px;
  background: var(--primary-color, #1890ff);
  border: none;
  border-radius: 6px;
  color: white;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-back-to-chart:hover {
  background: var(--primary-hover, #40a9ff);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(24, 144, 255, 0.3);
}

.btn-back-to-chart:active {
  transform: translateY(0);
}

.btn-back-to-chart svg {
  stroke: currentColor;
}