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

body {
    font-family: 'Noto Sans KR', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

/* Header */
header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 40px;
    text-align: center;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.subtitle {
    font-size: 1.1em;
    opacity: 0.9;
}

/* Main Content */
main {
    padding: 40px;
}

/* Upload Section */
.upload-section {
    margin-bottom: 40px;
}

.upload-area {
    border: 3px dashed #667eea;
    border-radius: 15px;
    padding: 60px 40px;
    text-align: center;
    background: #f8f9ff;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
}

.upload-area:hover {
    border-color: #764ba2;
    background: #f0f2ff;
    transform: translateY(-2px);
}

.upload-area.dragover {
    border-color: #764ba2;
    background: #e8ebff;
    transform: scale(1.02);
}

.upload-icon {
    font-size: 4em;
    color: #667eea;
    margin-bottom: 20px;
}

.upload-area h3 {
    font-size: 1.5em;
    color: #333;
    margin-bottom: 10px;
}

.upload-area p {
    color: #666;
    margin-bottom: 20px;
}

#fileInput {
    display: none;
}

.btn-upload {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 15px 40px;
    font-size: 1.1em;
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
}

.btn-upload:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
}

/* Preview Container */
.preview-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.preview-item {
    position: relative;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    background: white;
}

.preview-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.preview-item .remove-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(255, 59, 48, 0.9);
    color: white;
    border: none;
    width: 35px;
    height: 35px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2em;
    transition: all 0.3s ease;
}

.preview-item .remove-btn:hover {
    background: #ff3b30;
    transform: scale(1.1);
}

.preview-item .image-name {
    padding: 10px;
    font-size: 0.9em;
    color: #666;
    text-align: center;
    background: #f8f9fa;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 30px;
}

.btn-analyze {
    background: linear-gradient(135deg, #34d399 0%, #10b981 100%);
    color: white;
    border: none;
    padding: 15px 50px;
    font-size: 1.2em;
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
}

.btn-analyze:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(52, 211, 153, 0.4);
}

.btn-clear {
    background: #ef4444;
    color: white;
    border: none;
    padding: 15px 40px;
    font-size: 1.1em;
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
}

.btn-clear:hover {
    background: #dc2626;
    transform: translateY(-2px);
}

/* Loading Indicator */
.loading {
    text-align: center;
    padding: 40px;
}

.spinner {
    border: 4px solid #f3f3f3;
    border-top: 4px solid #667eea;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

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

.loading p {
    color: #666;
    font-size: 1.1em;
}

/* Result Section */
.result-section {
    margin-top: 40px;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 15px;
}

.section-header h2 {
    font-size: 1.8em;
    color: #333;
    display: flex;
    align-items: center;
    gap: 10px;
}

.export-buttons {
    display: flex;
    gap: 10px;
}

.btn-export {
    background: #667eea;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.95em;
}

.btn-export:hover {
    background: #764ba2;
    transform: translateY(-2px);
}

/* Table */
.table-container {
    overflow-x: auto;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

table {
    width: 100%;
    border-collapse: collapse;
    background: white;
}

thead {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

th {
    padding: 15px;
    text-align: left;
    font-weight: 600;
    font-size: 0.95em;
}

td {
    padding: 12px 15px;
    border-bottom: 1px solid #e5e7eb;
}

tbody tr {
    transition: background 0.2s ease;
}

tbody tr:hover {
    background: #f8f9ff;
}

td input {
    width: 100%;
    border: 1px solid #e5e7eb;
    padding: 8px;
    border-radius: 5px;
    font-family: 'Noto Sans KR', sans-serif;
    transition: border-color 0.3s ease;
}

td input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.btn-delete {
    background: #ef4444;
    color: white;
    border: none;
    padding: 8px 15px;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9em;
}

.btn-delete:hover {
    background: #dc2626;
    transform: scale(1.05);
}

/* Table Actions */
.table-actions {
    margin-top: 20px;
    display: flex;
    justify-content: center;
}

.btn-secondary {
    background: #6b7280;
    color: white;
    border: none;
    padding: 12px 30px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1em;
}

.btn-secondary:hover {
    background: #4b5563;
    transform: translateY(-2px);
}

/* Info Section */
.info-section {
    margin-top: 60px;
    padding: 40px;
    background: #f8f9ff;
    border-radius: 15px;
}

.info-section h3 {
    font-size: 1.8em;
    color: #333;
    margin-bottom: 30px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
}

.info-card {
    background: white;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
}

.info-card i {
    font-size: 2.5em;
    color: #667eea;
    margin-bottom: 15px;
}

.info-card h4 {
    font-size: 1.3em;
    color: #333;
    margin-bottom: 15px;
}

.info-card ul {
    list-style: none;
}

.info-card li {
    padding: 8px 0;
    color: #666;
    position: relative;
    padding-left: 25px;
}

.info-card li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #10b981;
    font-weight: bold;
}

/* Footer */
footer {
    background: #f8f9fa;
    padding: 20px;
    text-align: center;
    color: #666;
    border-top: 1px solid #e5e7eb;
}

/* Preview Number Badge */
.preview-number {
    position: absolute;
    top: 10px;
    left: 10px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 8px 15px;
    border-radius: 20px;
    font-weight: bold;
    font-size: 1.1em;
    z-index: 10;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.3);
}

/* Table Image Cell */
.image-cell {
    text-align: center;
    padding: 10px !important;
}

.table-thumbnail {
    width: 100px;
    height: 100px;
    object-fit: cover;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.table-thumbnail:hover {
    transform: scale(1.1);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.image-filename {
    margin-top: 5px;
    font-size: 0.75em;
    color: #666;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100px;
}

.no-image {
    color: #999;
    font-style: italic;
    text-align: center;
}

.row-number {
    font-weight: bold;
    color: #667eea;
    font-size: 1.1em;
}

/* Image Modal */
.image-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.image-modal.active {
    opacity: 1;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    cursor: pointer;
}

.modal-content {
    position: relative;
    background: white;
    border-radius: 15px;
    max-width: 90%;
    max-height: 90%;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    z-index: 10000;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.modal-header h3 {
    margin: 0;
    font-size: 1.3em;
}

.modal-close {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2em;
    transition: all 0.3s ease;
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: rotate(90deg);
}

.modal-body {
    padding: 0;
    max-height: 70vh;
    overflow: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f8f9fa;
}

.modal-body img {
    max-width: 100%;
    max-height: 70vh;
    display: block;
}

/* Responsive */
@media (max-width: 768px) {
    header h1 {
        font-size: 1.8em;
    }

    main {
        padding: 20px;
    }

    .upload-area {
        padding: 40px 20px;
    }

    .section-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .export-buttons {
        width: 100%;
        flex-direction: column;
    }

    .btn-export {
        width: 100%;
    }

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

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

    .btn-analyze,
    .btn-clear {
        width: 100%;
    }

    .table-thumbnail {
        width: 60px;
        height: 60px;
    }

    .image-filename {
        max-width: 60px;
    }

    .modal-content {
        max-width: 95%;
        max-height: 95%;
    }
}