.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

.page-wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  transition: opacity var(--transition-fast);
}

.logo:hover {
  opacity: 0.85;
}

.logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1rem;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
  position: relative;
}

.nav-link:hover {
  color: var(--color-text);
  background-color: var(--color-bg-secondary);
}

.nav-link.active {
  color: var(--color-primary);
  background-color: rgba(99, 102, 241, 0.1);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.main-content {
  flex: 1;
  padding-top: calc(var(--header-height) + 24px);
  padding-bottom: 48px;
}

.footer {
  background-color: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: 32px 0;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.875rem;
  transition: all var(--transition-normal);
}

.footer a {
  color: var(--color-primary);
  transition: opacity var(--transition-fast);
}

.footer a:hover {
  opacity: 0.8;
}

.grid-layout {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  padding: 16px 0;
}

.masonry-layout {
  columns: 4;
  column-gap: 12px;
  padding: 16px 0;
}

@media (max-width: 1200px) {
  .grid-layout {
    grid-template-columns: repeat(3, 1fr);
  }
  .masonry-layout {
    columns: 3;
  }
}

@media (max-width: 900px) {
  .grid-layout {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }
  .masonry-layout {
    columns: 2;
  }
}

@media (max-width: 600px) {
  .grid-layout {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }
  .masonry-layout {
    columns: 2;
  }

  .main-nav {
    display: none;
  }

  .header-inner {
    padding: 0 16px;
  }

  .container {
    padding: 0 16px;
  }
}