/**
 * Layout Styles
 * 布局样式
 */

/* 容器 */
.container {
  width: 100%;
  max-width: var(--container-lg);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.container-sm {
  max-width: var(--container-sm);
}

.container-md {
  max-width: var(--container-md);
}

.container-xl {
  max-width: var(--container-xl);
}

.container-2xl {
  max-width: var(--container-2xl);
}

/* Flex 布局 */
.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.flex-wrap {
  flex-wrap: wrap;
}

.items-center {
  align-items: center;
}

.items-start {
  align-items: flex-start;
}

.items-end {
  align-items: flex-end;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.justify-end {
  justify-content: flex-end;
}

.gap-xs { gap: var(--spacing-xs); }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }
.gap-xl { gap: var(--spacing-xl); }

/* Grid 布局 */
.grid {
  display: grid;
}

.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }

/* 区域布局 */
.section {
  padding: var(--spacing-3xl) 0;
}

.section-sm {
  padding: var(--spacing-xl) 0;
}

.section-lg {
  padding: var(--spacing-3xl) 0;
}

/* 导航栏布局 */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--navbar-height);
  background-color: var(--color-background);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: background-color var(--transition-normal),
              border-color var(--transition-normal);
}

.navbar-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* 主内容区域 */
.main {
  margin-top: var(--navbar-height);
  min-height: calc(100vh - var(--navbar-height));
}

/* 响应式布局 */
@media (max-width: 768px) {
  .container, .container-md, .container-xl, .container-2xl {
    padding: 0 var(--spacing-md);
  }

  .grid-cols-2, .grid-cols-3, .grid-cols-4, .grid-cols-6 {
    grid-template-columns: repeat(1, minmax(0, 1fr));
  }

  .section, .section-lg {
    padding: var(--spacing-2xl) 0;
  }
}