.auth-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.72);
    z-index: 9000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, visibility 0.2s ease;
    will-change: opacity;
    transform: translateZ(0);
}

.auth-modal-overlay.is-open {
    opacity: 1;
    visibility: visible;
}

.auth-modal {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border-base);
    border-radius: var(--radius-sm);
    padding: 40px 36px;
    max-width: 420px;
    width: 100%;
    position: relative;
    box-shadow: 0 24px 64px rgba(0, 0, 0, 0.4);
    transform: translateY(12px);
    transition: transform 0.2s ease;
    will-change: transform;
}

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

.auth-modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    background: var(--color-bg-overlay);
    border: 1px solid var(--color-border-base);
    color: var(--color-text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-family: var(--font-sans);
    transition: background-color var(--transition-base), color var(--transition-base), transform var(--transition-base);
}

.auth-modal-close:hover {
    background: var(--color-bg-muted);
    color: var(--color-text-primary);
}

.auth-modal-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-sm);
    background: rgba(37, 99, 235, 0.1);
    border: 1px solid rgba(37, 99, 235, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--color-primary);
    margin: 0 auto 24px;
}

.auth-modal-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-text-primary);
    text-align: center;
    margin: 0 0 10px;
    letter-spacing: -0.3px;
}

.auth-modal-desc {
    font-size: 14px;
    color: var(--color-text-muted);
    text-align: center;
    line-height: 1.6;
    margin: 0 0 28px;
}

.auth-modal-actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.auth-modal-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 20px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    font-family: var(--font-sans);
    text-decoration: none;
    cursor: pointer;
    border: 1px solid transparent;
    transition: background-color var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
}

.auth-modal-btn:hover {
    box-shadow: 0 0 14px var(--color-primary-glow);
}

.auth-modal-btn--primary {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

.auth-modal-btn--primary:hover {
    background: var(--color-primary-hover);
    box-shadow: 0 0 18px var(--color-primary-glow);
}

.auth-modal-btn--outline {
    background: transparent;
    color: var(--color-text-secondary);
    border-color: var(--color-border-strong);
}

.auth-modal-btn--outline:hover {
    background: var(--color-bg-overlay);
    color: var(--color-text-primary);
    box-shadow: 0 0 10px rgba(37, 99, 235, 0.1);
}

@media (max-width: 480px) {
    .auth-modal {
        padding: 32px 24px;
    }
}