/* ========== ENHANCED FILE UPLOAD STYLES FOR CHART CREATION ========== */

.file-upload-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    backdrop-filter: blur(10px);
}

.file-upload-modal {
    background: linear-gradient(135deg, #0a0e27 0%, #1a1f3a 50%, #0a0e27 100%);
    border: 2px solid #00ffff;
    border-radius: 15px;
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 0 50px rgba(0, 255, 255, 0.3);
    animation: modalSlideIn 0.3s ease-out;
}

.upload-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 25px;
    background: linear-gradient(45deg, #ff00ff, #00ffff);
    color: #000;
    border-top-left-radius: 13px;
    border-top-right-radius: 13px;
}

.upload-header h3 {
    margin: 0;
    font-weight: bold;
    font-size: 1.3em;
}

.close-upload-btn {
    background: none;
    border: none;
    font-size: 24px;
    font-weight: bold;
    color: #000;
    cursor: pointer;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.close-upload-btn:hover {
    background: rgba(0, 0, 0, 0.2);
    transform: rotate(90deg);
}

.upload-body {
    padding: 25px;
}

.drag-drop-zone {
    border: 3px dashed #00ffff;
    border-radius: 15px;
    padding: 40px 20px;
    text-align: center;
    background: linear-gradient(45deg, rgba(255, 0, 255, 0.1), rgba(0, 255, 255, 0.1));
    transition: all 0.3s ease;
    cursor: pointer;
    margin-bottom: 20px;
}

.drag-drop-zone:hover,
.drag-drop-zone.drag-over {
    border-color: #ff00ff;
    background: linear-gradient(45deg, rgba(255, 0, 255, 0.2), rgba(0, 255, 255, 0.2));
    transform: scale(1.02);
}

.upload-icon {
    font-size: 3em;
    margin-bottom: 10px;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-10px); }
    60% { transform: translateY(-5px); }
}

.upload-text {
    font-size: 1.2em;
    color: #00ffff;
    margin: 10px 0;
    font-weight: bold;
}

.upload-subtext {
    color: #ff00ff;
    margin: 5px 0 15px 0;
}

.browse-btn {
    background: linear-gradient(45deg, #ff00ff, #00ffff);
    color: #000;
    border: none;
    padding: 12px 25px;
    border-radius: 8px;
    font-weight: bold;
    cursor: pointer;
    font-size: 1em;
    transition: all 0.3s ease;
}

.browse-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.5);
}

.supported-formats {
    margin: 20px 0;
}

.supported-formats h4 {
    color: #00ffff;
    margin-bottom: 10px;
}

.format-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.format-tag {
    background: linear-gradient(45deg, rgba(255, 0, 255, 0.3), rgba(0, 255, 255, 0.3));
    color: #fff;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.9em;
    border: 1px solid #00ffff;
}

.upload-progress {
    margin: 20px 0;
}

.progress-bar {
    background: rgba(0, 0, 0, 0.3);
    height: 25px;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid #00ffff;
}

.progress-fill {
    background: linear-gradient(45deg, #ff00ff, #00ffff);
    height: 100%;
    width: 0%;
    transition: width 0.3s ease;
    border-radius: 12px;
}

.progress-text {
    text-align: center;
    color: #00ffff;
    margin-top: 10px;
    font-weight: bold;
}

.file-list {
    margin: 20px 0;
}

.file-list h4 {
    color: #ff00ff;
    margin-bottom: 15px;
}

.file-items {
    max-height: 200px;
    overflow-y: auto;
}

.file-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(0, 255, 255, 0.1);
    border: 1px solid #00ffff;
    border-radius: 8px;
    padding: 10px 15px;
    margin-bottom: 8px;
    transition: all 0.3s ease;
}

.file-item:hover {
    background: rgba(255, 0, 255, 0.1);
    border-color: #ff00ff;
    transform: translateX(5px);
}

.file-info {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
}

.file-icon {
    font-size: 1.2em;
}

.file-name {
    color: #00ffff;
    font-weight: bold;
    flex: 1;
}

.file-size {
    color: #ff00ff;
    font-size: 0.9em;
}

.remove-file-btn {
    background: #ff0000;
    color: #fff;
    border: none;
    width: 25px;
    height: 25px;
    border-radius: 50%;
    cursor: pointer;
    font-weight: bold;
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.remove-file-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 0 10px rgba(255, 0, 0, 0.5);
}

.upload-actions {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 25px;
}

.upload-actions .btn-primary,
.upload-actions .btn-secondary {
    padding: 12px 25px;
    border-radius: 8px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    font-size: 1em;
}

.upload-actions .btn-primary {
    background: linear-gradient(45deg, #00ffff, #ff00ff);
    color: #000;
}

.upload-actions .btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: #00ffff;
    border: 2px solid #00ffff;
}

.upload-actions .btn-primary:hover,
.upload-actions .btn-secondary:hover {
    transform: scale(1.05);
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.3);
}

.upload-actions .btn-primary:disabled {
    background: rgba(100, 100, 100, 0.5);
    color: #666;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.success-message {
    text-align: center;
    margin-bottom: 30px;
}

.success-icon {
    font-size: 4em;
    margin-bottom: 15px;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.success-message h4 {
    color: #00ffff;
    margin-bottom: 10px;
}

.success-message p {
    color: #ff00ff;
}

.chart-options {
    margin: 25px 0;
}

.chart-options h4 {
    color: #00ffff;
    margin-bottom: 15px;
}

.recommended-charts {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
}

.chart-option-btn {
    background: linear-gradient(135deg, rgba(0, 255, 255, 0.2), rgba(255, 0, 255, 0.2));
    border: 2px solid #00ffff;
    border-radius: 10px;
    padding: 15px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: #fff;
}

.chart-option-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0, 255, 255, 0.3);
    border-color: #ff00ff;
}

.chart-option-btn .chart-icon {
    font-size: 2em;
}

.next-steps {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 30px;
}

.next-steps .btn-primary,
.next-steps .btn-secondary {
    padding: 15px 30px;
    border-radius: 10px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    font-size: 1em;
}

.next-steps .btn-primary {
    background: linear-gradient(45deg, #ff00ff, #00ffff);
    color: #000;
}

.next-steps .btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: #ff00ff;
    border: 2px solid #ff00ff;
}

.next-steps .btn-primary:hover,
.next-steps .btn-secondary:hover {
    transform: scale(1.08);
    box-shadow: 0 0 30px rgba(255, 0, 255, 0.4);
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: scale(0.8) translateY(-50px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

/* Mobile responsiveness */
@media (max-width: 768px) {
    .file-upload-modal {
        width: 95%;
        margin: 10px;
    }
    
    .recommended-charts {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .next-steps {
        flex-direction: column;
        align-items: center;
    }
    
    .upload-actions {
        flex-direction: column;
        align-items: center;
    }
}