.layout {
  display: flex;
  flex-direction: column;
  height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
}

.layout.light {
  background-color: #f8f9fa;
  color: #333;
}

.layout.dark {
  background-color: #1a1a1a;
  color: #fff;
}

.layout-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background-color: #fff;
  border-bottom: 1px solid #e9ecef;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.layout.dark .layout-header {
  background-color: #2d2d2d;
  border-bottom-color: #404040;
}

.layout-header h1 {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 600;
  color: #007bff;
}

.layout.dark .layout-header h1 {
  color: #4dabf7;
}

.header-nav {
  display: flex;
  gap: 1rem;
}

.nav-button {
  padding: 0.5rem 1rem;
  border: 1px solid #007bff;
  background-color: transparent;
  color: #007bff;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.875rem;
  transition: all 0.2s ease;
}

.nav-button:hover {
  background-color: #007bff;
  color: white;
}

.layout.dark .nav-button {
  border-color: #4dabf7;
  color: #4dabf7;
}

.layout.dark .nav-button:hover {
  background-color: #4dabf7;
  color: #1a1a1a;
}

.layout-container {
  display: flex;
  flex: 1;
  overflow: hidden;
}

.layout-sidebar {
  background-color: #fff;
  border-right: 1px solid #e9ecef;
  overflow-y: auto;
}

.layout.dark .layout-sidebar {
  background-color: #2d2d2d;
  border-right-color: #404040;
}

.sidebar-nav {
  padding: 1rem 0;
}

.sidebar-item {
  display: block;
  padding: 0.75rem 1.5rem;
  color: #495057;
  text-decoration: none;
  transition: all 0.2s ease;
  border-left: 3px solid transparent;
}

.sidebar-item:hover {
  background-color: #f8f9fa;
  color: #007bff;
  border-left-color: #007bff;
}

.layout.dark .sidebar-item {
  color: #adb5bd;
}

.layout.dark .sidebar-item:hover {
  background-color: #404040;
  color: #4dabf7;
  border-left-color: #4dabf7;
}

.layout-main {
  flex: 1;
  overflow-y: auto;
  padding: 2rem;
}

.main-content {
  max-width: 1200px;
  margin: 0 auto;
  line-height: 1.6;
}

/* 반응형 디자인 */
@media (max-width: 768px) {
  .layout-header {
    padding: 1rem;
    flex-direction: column;
    gap: 1rem;
  }
  
  .layout-container {
    flex-direction: column;
  }
  
  .layout-sidebar {
    width: 100% !important;
    border-right: none;
    border-bottom: 1px solid #e9ecef;
  }
  
  .layout.dark .layout-sidebar {
    border-bottom-color: #404040;
  }
  
  .layout-main {
    padding: 1rem;
  }
}