:root {
    --shell-width: 640px;
}

.topbar {
    margin-bottom: 44px;
}

.login-panel {
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--surface);
    padding: 22px;
}

.login-panel.shake {
    animation: login-shake 320ms ease;
}

.summary {
    max-width: 520px;
    margin-top: 24px;
    margin-bottom: 22px;
}

.field {
    display: grid;
    gap: 8px;
    margin-bottom: 16px;
}

input,
select {
    width: 100%;
    min-height: 46px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--control);
    color: var(--text);
    padding: 0 12px;
}

.form-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.message {
    margin: 18px 0 0;
    color: var(--muted);
    line-height: 1.5;
}

.message.error {
    color: var(--danger);
    font-weight: 800;
}

@keyframes login-shake {
    0%,
    100% {
        transform: translateX(0);
    }

    20% {
        transform: translateX(-7px);
    }

    40% {
        transform: translateX(7px);
    }

    60% {
        transform: translateX(-4px);
    }

    80% {
        transform: translateX(4px);
    }
}

@media (max-width: 640px) {
    .topbar {
        margin-bottom: 24px;
    }

    .login-panel {
        padding: 18px;
    }

    .summary {
        margin-bottom: 18px;
    }

    .form-actions {
        align-items: stretch;
        flex-direction: column;
    }

    input,
    select {
        min-height: 48px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .login-panel.shake {
        animation: none;
    }
}