.auth-page-shell {
    min-height: 100vh;
    background:
        radial-gradient(circle at top right, color-mix(in srgb, var(--mud-palette-primary) 22%, transparent) 0%, transparent 45%),
        radial-gradient(circle at bottom left, color-mix(in srgb, var(--mud-palette-primary-lighten) 20%, transparent) 0%, transparent 40%),
        linear-gradient(145deg, var(--mud-palette-background) 0%, var(--mud-palette-surface) 100%);
}

.auth-split-layout {
    width: 100%;
    max-width: 1040px;
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    align-items: stretch;
}

.auth-brand-panel {
    display: none;
    border-radius: 18px;
    border: 1px solid color-mix(in srgb, var(--mud-palette-lines-default) 60%, transparent);
    background: linear-gradient(160deg,
            color-mix(in srgb, var(--mud-palette-primary) 22%, var(--mud-palette-surface) 78%) 0%,
            color-mix(in srgb, var(--mud-palette-primary-lighten) 12%, var(--mud-palette-surface) 88%) 100%);
    padding: 2rem;
}

.auth-brand-title {
    font-weight: 700;
    letter-spacing: 0.015em;
}

.auth-brand-list {
    margin-top: 1rem;
    display: grid;
    gap: 0.75rem;
}

.auth-brand-item {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.auth-form-panel {
    display: flex;
    align-items: center;
    justify-content: center;
}

.auth-card {
    width: 100%;
    max-width: 460px;
    border-radius: 18px;
    border: 1px solid color-mix(in srgb, var(--mud-palette-lines-default) 70%, transparent);
    backdrop-filter: blur(2px);
}

.auth-card-wide {
    width: 100%;
    max-width: 560px;
    border-radius: 18px;
    border: 1px solid color-mix(in srgb, var(--mud-palette-lines-default) 70%, transparent);
    backdrop-filter: blur(2px);
}

.auth-card-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 0.375rem;
    padding-top: 0.5rem;
}

.auth-header-title {
    font-weight: 700;
    letter-spacing: 0.01em;
}

.auth-header-subtitle {
    max-width: 380px;
}

.auth-footer-note {
    margin-top: 1rem;
    padding-top: 0.75rem;
    border-top: 1px solid color-mix(in srgb, var(--mud-palette-lines-default) 60%, transparent);
}

.auth-footer-note .mud-typography {
    color: var(--mud-palette-text-secondary);
}

.auth-support-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

@media (min-width: 960px) {
    .auth-split-layout {
        grid-template-columns: minmax(340px, 1fr) minmax(420px, 460px);
        gap: 1.25rem;
    }

    .auth-brand-panel {
        display: flex;
        flex-direction: column;
        justify-content: center;
    }
}