* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;

    min-height: 100vh;

    display: flex;
    flex-direction: column;

    font-family: var(--font-primary);

    background: var(--surface-main);

    color: var(--text-primary);

    text-align: center;

    /* allow subtle bounce but prevent scroll chaining */
    overscroll-behavior-y: contain;
}

:root {
    /* Success */

    --success-hue: 0deg;
    --success-saturation: 100%;
    --success-brightness: 100%;

    /* Warning */

    --warning-hue: 0deg;
    --warning-saturation: 100%;
    --warning-brightness: 100%;

    /* Critical */

    --critical-hue: 0deg;
    --critical-saturation: 100%;
    --critical-brightness: 100%;
}

.app-shell {
    max-width: var(--container-width);

    width: 100%;
    min-height: 100vh;

    margin: 0 auto;

    display: flex;
    flex-direction: column;

    background: var(--surface-container);

    box-shadow: var(--shadow-depth);

    border-left: 1px solid var(--border-faint);
    border-right: 1px solid var(--border-faint);
}