.alert-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    z-index: 9999;
    display: none;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: all 0.3s ease;
}

.alert-overlay.active {
    display: flex;
    opacity: 1;
}

.alert-card {
    background: var(--color-white);
    border-radius: var(--border-radius);
    padding: 2rem;
    text-align: center;
    max-width: 400px;
    width: 90%;
    box-shadow: var(--shadow-hover);
    transform: scale(0.8) translateY(50px);
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    border-top: 4px solid var(--color-primary);
}

.alert-overlay.active .alert-card {
    transform: scale(1) translateY(0);
}

.alert-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}


/* Loading específico */
.alert-card.loading {
    border-top-color: var(--color-primary);
}

.alert-card.loading .alert-icon {
    color: var(--color-primary);
    /* Animación aplicada en sección de animaciones */
}

.alert-card.loading .alert-title {
    color: var(--color-primary);
}

/* Success específico */
.alert-card.success {
    border-top-color: var(--color-success);
}

.alert-card.success .alert-icon {
    color: var(--color-success);
    /* Animación aplicada en sección de animaciones */
}

.alert-card.success .alert-title {
    color: var(--color-success);
}

/* Warning específico */
.alert-card.warning {
    border-top-color: var(--color-warning);
}

.alert-card.warning .alert-icon {
    color: var(--color-warning);
    /* Animación aplicada en sección de animaciones */
}

.alert-card.warning .alert-title {
    color: var(--color-warning);
}

/* Error específico */
.alert-card.error {
    border-top-color: var(--color-error);
}

.alert-card.error .alert-icon {
    color: var(--color-error);
    /* Animación aplicada en sección de animaciones */
}

.alert-card.error .alert-title {
    color: var(--color-error);
}

/* Confirm específico */
.alert-card.confirm {
    border-top-color: var(--color-primary);
    max-width: 450px;
}

.alert-card.confirm .alert-icon {
    color: var(--color-primary);
}

.alert-card.confirm .alert-title {
    color: var(--color-primary);
}

.confirm-buttons {
    display: none;
    gap: var(--space-md);
    justify-content: center;
    margin-top: var(--space-md);
}

.confirm-btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    min-width: 100px;
}

.confirm-btn.cancel {
    background: var(--color-surface-2);
    color: var(--color-gray-dark);
}

.confirm-btn.accept {
    background: var(--color-primary);
    color: var(--color-white);
}

.confirm-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* ===============================
           ANIMACIONES PERSONALIZADAS
           =============================== */

/* Loading Spinner Animation */
@keyframes alert-spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

@keyframes alert-spin-pulse {

    0%,
    100% {
        transform: rotate(0deg) scale(1);
        opacity: 1;
    }

    50% {
        transform: rotate(180deg) scale(1.1);
        opacity: 0.8;
    }
}

/* Success Checkmark Animation */
@keyframes alert-success-pop {
    0% {
        transform: scale(0) rotate(-45deg);
        opacity: 0;
    }

    50% {
        transform: scale(1.2) rotate(-45deg);
        opacity: 1;
    }

    100% {
        transform: scale(1) rotate(0deg);
        opacity: 1;
    }
}

@keyframes alert-success-bounce {

    0%,
    20%,
    53%,
    80%,
    100% {
        transform: translate3d(0, 0, 0) scale(1);
    }

    40%,
    43% {
        transform: translate3d(0, -10px, 0) scale(1.1);
    }

    70% {
        transform: translate3d(0, -5px, 0) scale(1.05);
    }

    90% {
        transform: translate3d(0, -2px, 0) scale(1.02);
    }
}

/* Warning Pulse Animation */
@keyframes alert-warning-pulse {
    0% {
        transform: scale(1);
        opacity: 1;
        filter: drop-shadow(0 0 0 rgba(255, 193, 7, 0.7));
    }

    50% {
        transform: scale(1.15);
        opacity: 0.8;
        filter: drop-shadow(0 0 20px rgba(255, 193, 7, 0.8));
    }

    100% {
        transform: scale(1);
        opacity: 1;
        filter: drop-shadow(0 0 0 rgba(255, 193, 7, 0.7));
    }
}

@keyframes alert-warning-shake {

    0%,
    100% {
        transform: translateX(0) rotate(0deg);
    }

    10%,
    30%,
    50%,
    70%,
    90% {
        transform: translateX(-3px) rotate(-2deg);
    }

    20%,
    40%,
    60%,
    80% {
        transform: translateX(3px) rotate(2deg);
    }
}

/* Error X Animation */
@keyframes alert-error-shake {

    0%,
    100% {
        transform: translateX(0) scale(1);
    }

    10%,
    30%,
    50%,
    70%,
    90% {
        transform: translateX(-8px) scale(1.05);
    }

    20%,
    40%,
    60%,
    80% {
        transform: translateX(8px) scale(1.05);
    }
}

@keyframes alert-error-flash {

    0%,
    50%,
    100% {
        opacity: 1;
        filter: drop-shadow(0 0 5px rgba(220, 53, 69, 0.8));
    }

    25%,
    75% {
        opacity: 0.7;
        filter: drop-shadow(0 0 15px rgba(220, 53, 69, 1));
    }
}

/* Aplicar animaciones específicas por tipo */
.alert-card.loading .alert-icon {
    animation: alert-spin-pulse 2s ease-in-out infinite;
}

.alert-card.success .alert-icon {
    animation: alert-success-pop 0.6s ease-out, alert-success-bounce 1s ease-out 0.6s;
}

.alert-card.warning .alert-icon {
    animation: alert-warning-pulse 1.5s ease-in-out infinite, alert-warning-shake 0.5s ease-in-out 0.5s;
}

.alert-card.error .alert-icon {
    animation: alert-error-shake 0.8s ease-in-out, alert-error-flash 2s ease-in-out infinite 0.8s;
}

/* Responsive */
@media (max-width: 768px) {
    .demo-container {
        padding: 2rem;
        margin: 1rem;
    }

    .confirm-buttons {
        flex-direction: column;
    }

    .confirm-btn {
        width: 100%;
    }

    .alert-card {
        padding: 1.5rem;
    }

    .alert-icon {
        font-size: 3rem;
    }

    .demo-title {
        font-size: 2rem;
    }
}