/* Loading indicator styles */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.8);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    display: none;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 5px solid #f3f3f3;
    border-top: 5px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

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

.loading-text {
    margin-top: 15px;
    font-weight: 500;
    color: var(--primary-color);
}

:root {
    --primary-color: #4f46e5;
    --secondary-color: #6366f1;
    --light-bg: #f9fafb;
    --dark-text: #1f2937;
    --border-color: #e5e7eb;
    --success-color: #10b981;
    --error-color: #ef4444;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--light-bg);
    color: var(--dark-text);
    line-height: 1.6;
    padding: 20px;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    padding: 30px;
}

h1 {
    text-align: center;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.description {
    text-align: center;
    margin-bottom: 30px;
    color: #6b7280;
}

.upload-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 40px;
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    margin-bottom: 30px;
    background-color: #f8fafc;
    transition: all 0.3s ease;
}

.upload-container:hover {
    border-color: var(--secondary-color);
    background-color: rgba(99, 102, 241, 0.05);
}

.upload-container.highlight {
    border-color: var(--primary-color);
    background-color: rgba(79, 70, 229, 0.1);
}

.upload-icon {
    font-size: 48px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.file-input {
    display: none;
}

.upload-btn {
    background-color: var(--primary-color);
    color: white;
    padding: 12px 24px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
    margin-bottom: 15px;
}

.upload-btn:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
}

.file-info {
    margin-top: 10px;
    font-size: 14px;
    color: #6b7280;
}

.controls {
    display: none;
    margin-bottom: 30px;
    padding: 20px;
    background-color: #f3f4f6;
    border-radius: 8px;
}

.controls.active {
    display: block;
}

.control-group {
    margin-bottom: 15px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

select,
input[type="file"],
button {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-family: inherit;
}

button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
}

button:hover {
    background-color: var(--secondary-color);
}

button.secondary {
    background-color: white;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

button.secondary:hover {
    background-color: var(--light-bg);
}

.action-btns {
    display: flex;
    gap: 10px;
    margin-top: 15px;
}

.action-btns button {
    flex: 1;
}

.data-container {
    display: none;
}

.data-container.active {
    display: block;
}

.file-overview {
    display: none;
    margin-bottom: 30px;
}

.file-overview.active {
    display: block;
}

.file-card {
    background-color: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 15px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.file-card h3 {
    color: var(--primary-color);
    margin-bottom: 10px;
}

.file-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-top: 15px;
}

.stat-item {
    background-color: #f8fafc;
    padding: 10px;
    border-radius: 6px;
    text-align: center;
}

.stat-value {
    font-size: 24px;
    font-weight: 600;
    color: var(--primary-color);
}

.stat-label {
    font-size: 12px;
    color: #6b7280;
    margin-top: 5px;
}

.sheet-list {
    margin-top: 15px;
}

.sheet-item {
    background-color: #f3f4f6;
    padding: 10px;
    margin: 5px 0;
    border-radius: 6px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.sheet-name {
    font-weight: 500;
}

.sheet-info {
    font-size: 12px;
    color: #6b7280;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
    overflow-x: auto;
}

th,
td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: var(--primary-color);
    color: white;
    font-weight: 500;
}

tr:nth-child(even) {
    background-color: #f9fafb;
}

tr:hover {
    background-color: #f3f4f6;
}

.data-preview {
    margin-top: 30px;
}

.preview-card {
    background-color: white;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    margin-bottom: 20px;
}

.preview-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.preview-content {
    background-color: #f8fafc;
    padding: 15px;
    border-radius: 6px;
    font-family: monospace;
    white-space: pre-wrap;
    overflow-x: auto;
}

.status-message {
    padding: 15px;
    border-radius: 6px;
    margin-bottom: 20px;
    text-align: center;
    display: none;
}

.status-message.success {
    background-color: #ecfdf5;
    color: var(--success-color);
    border: 1px solid #a7f3d0;
    display: block;
}

.status-message.error {
    background-color: #fef2f2;
    color: var(--error-color);
    border: 1px solid #fecaca;
    display: block;
}

.row-count {
    margin-top: 15px;
    font-size: 14px;
    color: #6b7280;
}

.control-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
}

.hidden {
    display: none;
}

.filters {
    display: flex;
    justify-content: space-between;
}

.filter {
    display: flex;
    flex: 1;
    justify-content: flex-start;
}

.filter > input {
    height: 20px;
    width: 20px;
    margin-right: 10px;
    margin-bottom: 30px;
}

@media (max-width: 768px) {
    .container {
        padding: 15px;
    }

    .upload-container {
        padding: 20px;
    }

    .action-btns {
        flex-direction: column;
    }

    .control-grid {
        grid-template-columns: 1fr;
    }

    .file-stats {
        grid-template-columns: repeat(2, 1fr);
    }
}