.session-expiration-overlay {
    position: fixed;
    inset: 0;
    z-index: 30000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: rgba(17, 24, 39, 0.52);
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
}

.session-expiration-card {
    width: min(470px, calc(100vw - 32px));
    overflow: hidden;
    background: #ffffff;
    border: 1px solid rgba(15, 23, 42, 0.08);
    border-radius: 17px;
    box-shadow: 0 24px 70px rgba(15, 23, 42, 0.28);
    color: #1f2937;
    animation: session-expiration-enter 160ms ease-out;
}

.session-expiration-accent {
    height: 4px;
    background: var(--mud-palette-primary, #1976d2);
}

.session-expiration-card--urgent .session-expiration-accent {
    background: var(--mud-palette-error, #d32f2f);
}

.session-expiration-body {
    padding: 28px 28px 23px;
}

.session-expiration-heading {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.session-expiration-icon {
    width: 46px;
    height: 46px;
    flex: 0 0 46px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: color-mix(in srgb, var(--mud-palette-primary, #1976d2) 10%, white);
    color: var(--mud-palette-primary, #1976d2);
}

.session-expiration-card--urgent .session-expiration-icon {
    background: color-mix(in srgb, var(--mud-palette-error, #d32f2f) 10%, white);
    color: var(--mud-palette-error, #d32f2f);
}

.session-expiration-heading-text {
    min-width: 0;
    padding-top: 1px;
}

.session-expiration-title {
    margin: 0;
    font-size: 1.16rem;
    line-height: 1.35;
    font-weight: 700;
    color: #111827;
}

.session-expiration-message {
    margin-top: 5px;
    color: #6b7280;
    font-size: 0.93rem;
    line-height: 1.48;
}

.session-expiration-timer {
    margin-top: 22px;
    padding: 17px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    background: #f9fafb;
}

.session-expiration-timer-label {
    color: #6b7280;
    font-size: 0.84rem;
    font-weight: 600;
}

.session-expiration-timer-value {
    color: #111827;
    font-size: 1.95rem;
    line-height: 1;
    font-weight: 750;
    letter-spacing: 0.025em;
    font-variant-numeric: tabular-nums;
}

.session-expiration-card--urgent .session-expiration-timer-value {
    color: var(--mud-palette-error, #d32f2f);
}

.session-expiration-error {
    margin-top: 17px;
    padding: 11px 13px;
    display: flex;
    align-items: flex-start;
    gap: 8px;
    border: 1px solid rgba(211, 47, 47, 0.24);
    border-radius: 10px;
    background: rgba(211, 47, 47, 0.06);
    color: #b42318;
    font-size: 0.86rem;
    line-height: 1.4;
}

.session-expiration-actions {
    padding: 16px 20px;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 11px;
    border-top: 1px solid #eef0f3;
    background: #fbfbfc;
}

.session-expiration-button {
    min-height: 41px;
    padding: 9px 16px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    border-radius: 9px;
    border: 1px solid transparent;
    font: inherit;
    font-size: 0.86rem;
    font-weight: 650;
    cursor: pointer;
    transition: background 120ms ease, border-color 120ms ease, box-shadow 120ms ease, transform 120ms ease;
}

.session-expiration-button:focus-visible {
    outline: 3px solid color-mix(in srgb, var(--mud-palette-primary, #1976d2) 24%, transparent);
    outline-offset: 2px;
}

.session-expiration-button:active:not(:disabled) {
    transform: translateY(1px);
}

.session-expiration-button--secondary {
    border-color: #d9dde3;
    background: #ffffff;
    color: #374151;
}

.session-expiration-button--secondary:hover {
    background: #f5f6f8;
}

.session-expiration-button--primary {
    background: var(--mud-palette-primary, #1976d2);
    color: #ffffff;
    box-shadow: 0 2px 5px rgba(15, 23, 42, 0.12);
}

.session-expiration-button--primary:hover:not(:disabled) {
    filter: brightness(0.96);
}

.session-expiration-card--urgent .session-expiration-button--primary {
    background: var(--mud-palette-error, #d32f2f);
}

.session-expiration-button:disabled {
    opacity: 0.62;
    cursor: default;
}

@keyframes session-expiration-enter {
    from {
        opacity: 0;
        transform: translateY(8px) scale(0.985);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@media (max-width: 520px) {
    .session-expiration-overlay {
        padding: 12px;
    }

    .session-expiration-card {
        width: 100%;
    }

    .session-expiration-body {
        padding: 22px 19px 19px;
    }

    .session-expiration-actions {
        flex-direction: column-reverse;
        align-items: stretch;
    }

    .session-expiration-button {
        width: 100%;
    }
}