body {
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    color: var(--color-gray-800);
    background-color: var(--color-gray-50);
}

#app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

#header {
    position: sticky;
    top: 0;
    height: var(--header-height);
    background-color: white;
    border-bottom: 1px solid var(--color-gray-200);
    box-shadow: var(--shadow-sm);
    z-index: 100;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--max-width-content);
    height: 100%;
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

.header-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary-600);
}

#main {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-8) var(--spacing-4);
}

section {
    width: 100%;
    max-width: var(--max-width-content);
}

#footer {
    height: 48px;
    background-color: var(--color-gray-100);
    border-top: 1px solid var(--color-gray-200);
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}

.hidden {
    display: none !important;
}