/**
 * Download Button Loading States & Upgrade Prompt
 * Used by download-manager.js for CDN download orchestration
 */

/* Download button loading states */
.download-btn,
.btn-download-package {
    position: relative;
    min-width: 140px;
    transition: all var(--transition-base);
}

.download-btn.loading,
.btn-download-package.loading {
    opacity: 0.7;
    cursor: not-allowed;
}

/* Spinner animation (indeterminate, no percentage) */
.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgb(255 255 255 / 30%);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    vertical-align: middle;
    margin-right: var(--space-2);
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Mobile touch optimization */
@media (width < 768px) {
    .download-btn,
    .btn-download-package {
        min-width: 120px;
        padding: var(--space-3) var(--space-5); /* Larger touch target */
    }
}

/* ===== Upgrade Prompt Modal ===== */

.upgrade-prompt-modal {
    position: fixed;
    inset: 0;
    z-index: var(--z-skip-link);
    display: flex;
    align-items: center;
    justify-content: center;
}

.upgrade-prompt-overlay {
    position: absolute;
    inset: 0;
    background: rgb(0 0 0 / 60%);
    backdrop-filter: blur(4px);
}

.upgrade-prompt-content {
    position: relative;
    background: var(--color-white);
    border-radius: 12px;
    padding: var(--space-8);
    max-width: 420px;
    width: 90%;
    box-shadow: 0 20px 40px rgb(0 0 0 / 30%);
    text-align: center;
}

.upgrade-prompt-content h3 {
    margin: 0 0 var(--space-4);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-gray-900);
}

.upgrade-prompt-content p {
    margin: 0 0 var(--space-6);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-gray-600);
}

.upgrade-prompt-actions {
    display: flex;
    gap: var(--space-3);
    justify-content: center;
}

.upgrade-prompt-actions .btn {
    padding: var(--space-3) var(--space-6);
    font-size: 1rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-base);
    min-width: 120px;
}

.upgrade-prompt-actions .btn-primary {
    background: var(--color-navy);
    color: var(--color-white);
    border: none;
}

@media (hover: hover) {
    .upgrade-prompt-actions .btn-primary:hover {
        background: var(--color-navy-800);
        transform: translateY(-2px);
        box-shadow: var(--shadow-md);
    }
}

.upgrade-prompt-actions .btn-primary:active {
    transform: translateY(1px);
    box-shadow: var(--shadow-sm);
}

.upgrade-prompt-actions .btn-secondary {
    background: transparent;
    color: var(--color-gray-600);
    border: 1px solid var(--color-gray-300);
}

@media (hover: hover) {
    .upgrade-prompt-actions .btn-secondary:hover {
        background: var(--color-gray-50);
        transform: translateY(-2px);
        box-shadow: var(--shadow-sm);
    }
}

.upgrade-prompt-actions .btn-secondary:active {
    transform: translateY(1px);
    box-shadow: none;
}

/* Mobile responsiveness */
@media (width <= 480px) {
    .upgrade-prompt-content {
        padding: var(--space-6);
        margin: var(--space-4);
    }

    .upgrade-prompt-actions {
        flex-direction: column;
    }

    .upgrade-prompt-actions .btn {
        width: 100%;
    }
}