.login-required-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.55);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    padding: 12px;
}

.login-required-overlay.is-open {
    display: flex;
}

.login-required-modal {
    width: min(420px, 100%);
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 18px 45px rgba(2, 6, 23, 0.25);
    overflow: hidden;
    transform: translateY(8px) scale(0.98);
    opacity: 0;
    transition: transform 160ms ease, opacity 160ms ease;
}

.login-required-overlay.is-open .login-required-modal {
    transform: translateY(0) scale(1);
    opacity: 1;
}

.login-required-header {
    padding: 14px 16px 10px 16px;
    text-align: center;
}

.login-required-title {
    margin: 0;
    font-size: 16px;
    font-weight: 700;
    color: #111827;
    line-height: 1.2;
    letter-spacing: 0.2px;
}

.login-required-message {
    margin: 8px 0 0 0;
    font-size: 13px;
    color: #4b5563;
    line-height: 1.5;
    text-align: center;
}

.login-required-actions {
    display: flex;
    gap: 10px;
    padding: 12px 16px 14px 16px;
    justify-content: center;
    border-top: 1px solid #eef2f7;
    background: linear-gradient(180deg, #fafafa 0%, #ffffff 100%);
    flex-wrap: wrap;
}

.login-required-btn {
    border: 0;
    border-radius: 10px;
    padding: 9px 14px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.04s ease, background 0.12s ease, color 0.12s ease, box-shadow 0.12s ease;
    white-space: nowrap;
    min-width: 120px;
}

.login-required-btn:active {
    transform: translateY(1px);
}

.login-required-btn-cancel {
    background: #e5e7eb;
    color: #111827;
}

.login-required-btn-cancel:hover {
    background: #d1d5db;
}

.login-required-btn-ok {
    background: #2563eb;
    color: #ffffff;
    box-shadow: 0 10px 18px rgba(37, 99, 235, 0.25);
}

.login-required-btn-ok:hover {
    background: #1d4ed8;
}