html, body { width: 100%; min-height: 100%; margin: 0; }
html, body { background: var(--mtrl-sys-color-surface-container-low); color: var(--mtrl-sys-color-on-surface); }
#app { min-height: 100vh; box-sizing: border-box; display: flex; justify-content: center; padding: 32px 24px; }