.app-container { min-height: 100vh; display: flex; flex-direction: column; }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }
.main-content { flex: 1; padding: 2rem 0; }
.header { background-color: var(--color-surface); border-bottom: 1px solid var(--color-border); position: sticky; top: 0; z-index: 50; }
.header-content { height: 4rem; display: flex; justify-content: space-between; align-items: center; }
.footer { background-color: var(--color-surface); border-top: 1px solid var(--color-border); padding: 3rem 0; margin-top: auto; }
.section { margin-bottom: 4rem; }