/* Loading Overlay Styles */
.download-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    opacity: 1;
    transition: opacity 0.3s ease;
}

.download-overlay.hidden {
    display: none;
    opacity: 0;
}

.download-overlay-content {
    background: white;
    padding: 40px;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    max-width: 400px;
    width: 90%;
    position: relative;
    animation: fadeInScale 0.3s ease-out;
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.download-overlay-content .spinner {
    width: 60px;
    height: 60px;
    margin: 0 auto 20px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #1a73e8;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.download-overlay-content h3 {
    margin: 0 0 10px 0;
    color: #333;
    font-size: 20px;
    font-weight: 600;
}

.download-overlay-content p {
    font-size: 16px;
    color: #666;
    margin: 0 0 20px 0;
    line-height: 1.5;
}

.progress-bar {
    width: 100%;
    height: 6px;
    background: #f0f0f0;
    border-radius: 3px;
    overflow: hidden;
    margin-top: 15px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #1a73e8, #4285f4);
    width: 0%;
    animation: progress 3s ease-in-out infinite;
    border-radius: 3px;
}

/* Facebook variant */
.download-overlay.facebook .spinner {
    border-top-color: #4267B2;
}

.download-overlay.facebook .progress-fill {
    background: linear-gradient(90deg, #4267B2, #365899);
}

/* YouTube variant */
.download-overlay.youtube .spinner {
    border-top-color: #1a73e8;
}

.download-overlay.youtube .progress-fill {
    background: linear-gradient(90deg, #1a73e8, #4285f4);
}

@keyframes progress {
    0% { width: 0%; }
    50% { width: 70%; }
    100% { width: 100%; }
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Mobile responsive */
@media (max-width: 768px) {
    .download-overlay-content {
        padding: 30px 20px;
        margin: 20px;
        max-width: none;
        width: calc(100% - 40px);
    }

    .download-overlay-content .spinner {
        width: 50px;
        height: 50px;
        margin-bottom: 15px;
    }

    .download-overlay-content h3 {
        font-size: 18px;
    }

    .download-overlay-content p {
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    .download-overlay-content {
        padding: 25px 15px;
        margin: 15px;
        border-radius: 12px;
    }

    .download-overlay-content .spinner {
        width: 40px;
        height: 40px;
    }

    .download-overlay-content h3 {
        font-size: 16px;
    }

    .download-overlay-content p {
        font-size: 13px;
    }
}

/* Loading states */
.download-overlay.loading .progress-fill {
    animation: progress 2s ease-in-out infinite;
}

.download-overlay.processing .progress-fill {
    animation: progress 4s ease-in-out infinite;
}

.download-overlay.completing .progress-fill {
    animation: progressComplete 1s ease-out forwards;
}

@keyframes progressComplete {
    from { width: 70%; }
    to { width: 100%; }
}

/* Success state */
.download-overlay.success .spinner {
    display: none;
}

.download-overlay.success .download-overlay-content::before {
    content: "✓";
    display: block;
    font-size: 48px;
    color: #4caf50;
    margin-bottom: 15px;
    animation: successPulse 0.6s ease-out;
}

@keyframes successPulse {
    0% {
        transform: scale(0);
        opacity: 0;
    }
    50% {
        transform: scale(1.2);
        opacity: 1;
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

/* Error state */
.download-overlay.error .spinner {
    display: none;
}

.download-overlay.error .download-overlay-content::before {
    content: "✗";
    display: block;
    font-size: 48px;
    color: #f44336;
    margin-bottom: 15px;
    animation: errorShake 0.6s ease-out;
}

@keyframes errorShake {
    0%, 20%, 40%, 60%, 80% {
        transform: translateX(-10px);
    }
    10%, 30%, 50%, 70%, 90% {
        transform: translateX(10px);
    }
    100% {
        transform: translateX(0);
    }
}

.download-overlay.tiktok .spinner {
    border-top-color: #ff0050;
}

.download-overlay.tiktok .progress-fill {
    background: linear-gradient(90deg, #ff0050, #fe2c55);
}