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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    background: rgba(255, 255, 255, 0.95);
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    margin-bottom: 30px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
}

header h1 {
    color: #667eea !important;
    font-size: 2.5rem;
    margin-bottom: 10px;
}

header p {
    color: #666;
    font-size: 1.1rem;
}

/* 관리자 로그인 스타일 */
.login-section {
    margin-top: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.login-form {
    background: rgba(255, 255, 255, 0.9);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 400px;
}

.login-form h3 {
    text-align: center;
    margin-bottom: 20px;
    color: #4a5568;
    font-size: 1.4rem;
}

.login-form .form-group {
    margin-bottom: 15px;
}

.login-form input {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
}

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

.login-btn {
    width: 100%;
    padding: 12px 20px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.login-btn:hover {
    background: #5a67d8;
    transform: translateY(-1px);
}

.login-btn:disabled {
    background: #cbd5e0;
    cursor: not-allowed;
    transform: none;
}

.admin-section {
    margin-top: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.admin-info {
    display: flex;
    align-items: center;
    gap: 15px;
    background: rgba(72, 187, 120, 0.1);
    padding: 12px 20px;
    border-radius: 8px;
    border: 1px solid rgba(72, 187, 120, 0.3);
}

.admin-info span {
    color: #2f855a;
    font-weight: 500;
}

.connection-status {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.9rem;
    font-weight: 500;
}

.connection-status.online {
    background: rgba(72, 187, 120, 0.1);
    color: #2f855a;
}

.logout-btn {
    padding: 6px 12px;
    background: #e53e3e;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.logout-btn:hover {
    background: #c53030;
}

.public-link {
    margin-top: 10px;
}

.public-btn {
    display: inline-block;
    padding: 8px 16px;
    background: #48bb78;
    color: white;
    text-decoration: none;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.public-btn:hover {
    background: #38a169;
    transform: translateY(-1px);
}

.auth-section {
    margin-top: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
}

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

.auth-btn {
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    font-weight: 500;
    background: #667eea;
    color: white;
}

.auth-btn:hover {
    background: #5a67d8;
    transform: translateY(-1px);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 15px;
    background: rgba(72, 187, 120, 0.1);
    padding: 10px 15px;
    border-radius: 8px;
    border: 1px solid rgba(72, 187, 120, 0.3);
}

.user-info span {
    color: #2f855a;
    font-weight: 500;
}

.auth-switch {
    text-align: center;
    margin-top: 15px;
    color: #666;
}

.auth-switch a {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
}

.auth-switch a:hover {
    text-decoration: underline;
}

.loading {
    text-align: center;
    padding: 20px;
    color: #666;
}

.loading p {
    margin: 0;
    font-style: italic;
}

.offline-mode {
    background: rgba(255, 193, 7, 0.1);
    border: 1px solid rgba(255, 193, 7, 0.3);
    padding: 10px 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    text-align: center;
    color: #856404;
}

/* 게스트 모드 스타일 */
.guest-mode {
    background: linear-gradient(135deg, #a8e6cf, #88d8a3);
    color: #2d3436;
    padding: 15px 20px;
    border-radius: 8px;
    margin: 20px 0;
    border: 2px solid #00b894;
    box-shadow: 0 2px 10px rgba(0, 184, 148, 0.2);
}

/* 데이터베이스 모드 스타일 */
.database-mode {
    background: linear-gradient(135deg, #81ecec, #74b9ff);
    color: #2d3436;
    padding: 15px 20px;
    border-radius: 8px;
    margin: 20px 0;
    border: 2px solid #0984e3;
    box-shadow: 0 2px 10px rgba(9, 132, 227, 0.2);
}

.database-mode-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.database-info {
    font-weight: 500;
    color: #0984e3;
}

/* 로그인 필요 모드 스타일 */
.auth-required-mode {
    background: linear-gradient(135deg, #fdcb6e, #e17055);
    color: #2d3436;
    padding: 15px 20px;
    border-radius: 8px;
    margin: 20px 0;
    border: 2px solid #e17055;
    box-shadow: 0 2px 10px rgba(225, 112, 85, 0.2);
}

.auth-required-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.auth-info {
    font-weight: 500;
    color: #d63031;
}

.guest-mode-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.guest-login-btn {
    background: #00b894;
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 5px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
}

.guest-login-btn:hover {
    background: #00a085;
    transform: translateY(-1px);
}

.read-only-badge {
    background: #74b9ff;
    color: white;
    padding: 6px 12px;
    border-radius: 15px;
    font-size: 0.8em;
    font-weight: 500;
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    margin-left: auto;
}

.sync-status {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 500;
}

.sync-status.online {
    background: rgba(72, 187, 120, 0.1);
    color: #2f855a;
}

.sync-status.offline {
    background: rgba(255, 193, 7, 0.1);
    color: #856404;
}

.sync-status.syncing {
    background: rgba(102, 126, 234, 0.1);
    color: #4c51bf;
}

.search-section {
    background: rgba(255, 255, 255, 0.95);
    padding: 20px;
    border-radius: 15px;
    margin-bottom: 30px;
    display: flex;
    gap: 15px;
    align-items: center;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    flex-wrap: wrap;
}

.search-section input,
.search-section select {
    padding: 12px 15px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
    flex: 1;
    min-width: 200px;
}

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

.search-section button {
    padding: 12px 20px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.search-section button:hover {
    background: #5a67d8;
    transform: translateY(-2px);
}

.form-section {
    background: rgba(255, 255, 255, 0.95);
    padding: 30px;
    border-radius: 15px;
    margin-bottom: 30px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
}

.form-section h2 {
    color: #4a5568;
    margin-bottom: 25px;
    font-size: 1.8rem;
}

/* 탭 스타일 */
.section-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 25px;
    border-bottom: 2px solid #e2e8f0;
}

.tab-btn {
    padding: 12px 24px;
    border: none;
    background: transparent;
    color: #6b7280;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.3s ease;
}

.tab-btn:hover {
    color: #667eea;
    background: rgba(102, 126, 234, 0.1);
}

.tab-btn.active {
    color: #667eea;
    border-bottom-color: #667eea;
    background: rgba(102, 126, 234, 0.1);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* 카테고리 관리 스타일 */
.category-list-section {
    margin-top: 40px;
    padding-top: 30px;
    border-top: 2px solid #e2e8f0;
}

.category-list-section h3 {
    color: #4a5568;
    margin-bottom: 20px;
    font-size: 1.4rem;
}

.category-list {
    display: grid;
    gap: 10px;
}

.category-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    background: #f8fafc;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.category-item:hover {
    border-color: #667eea;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.1);
}

.category-info {
    display: flex;
    align-items: center;
    gap: 15px;
    flex: 1;
}

.category-name {
    font-weight: 600;
    color: #374151;
    font-size: 1.1rem;
}

.category-count {
    background: #667eea;
    color: white;
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 500;
}

.category-actions {
    display: flex;
    gap: 8px;
}

.category-btn {
    padding: 6px 12px;
    border: none;
    border-radius: 4px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 500;
}

.category-edit-btn {
    background: #3b82f6;
    color: white;
}

.category-edit-btn:hover {
    background: #2563eb;
    transform: translateY(-1px);
}

.category-delete-btn {
    background: #ef4444;
    color: white;
}

.category-delete-btn:hover {
    background: #dc2626;
    transform: translateY(-1px);
}

.category-default {
    opacity: 0.7;
}

.category-default .category-delete-btn {
    background: #9ca3af;
    cursor: not-allowed;
}

.category-default .category-delete-btn:hover {
    background: #9ca3af;
    transform: none;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #4a5568;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
    font-family: inherit;
}

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

.form-group small {
    color: #666;
    font-size: 0.9rem;
    margin-top: 5px;
    display: block;
}

.form-buttons {
    display: flex;
    gap: 15px;
    margin-top: 25px;
}

.form-buttons button {
    padding: 12px 25px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
}

#submitBtn {
    background: #48bb78;
    color: white;
}

#submitBtn:hover {
    background: #38a169;
    transform: translateY(-2px);
}

#cancelBtn {
    background: #e2e8f0;
    color: #4a5568;
}

#cancelBtn:hover {
    background: #cbd5e0;
    transform: translateY(-2px);
}

.list-section {
    background: rgba(255, 255, 255, 0.95);
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
}

.list-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    flex-wrap: wrap;
    gap: 15px;
}

.list-header h2 {
    color: #4a5568;
    font-size: 1.8rem;
}

.sort-options select {
    padding: 10px 15px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
}

/* 게시판 스타일 */
.board-container {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 12px;
    padding: 20px;
    margin-top: 20px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
}

.board-table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

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

.board-table th {
    padding: 12px;
    text-align: center;
    font-weight: 600;
    font-size: 0.95rem;
    border-right: 1px solid rgba(255, 255, 255, 0.2);
}

.board-table th:last-child {
    border-right: none;
}

.board-table tbody tr {
    border-bottom: 1px solid #e5e7eb;
    transition: background-color 0.2s ease;
}

.board-table tbody tr:hover {
    background-color: #f8fafc;
}

.board-table tbody tr:last-child {
    border-bottom: none;
}

.board-table td {
    padding: 8px 12px;
    text-align: center;
    vertical-align: middle;
    font-size: 0.9rem;
    line-height: 1.4;
}

/* 컬럼 너비 설정 */
.col-no { width: 60px; }
.col-category { width: 100px; }
.col-title { width: auto; min-width: 200px; text-align: left; }
.col-attachment { width: 220px; text-align: center; }
.col-date { width: 120px; }
.col-actions { width: 150px; }

/* 제목 스타일 */
.board-title {
    color: #374151;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    display: block;
    padding: 4px 6px;
    border-radius: 4px;
    transition: all 0.2s ease;
}

.board-title:hover {
    background-color: #e0e7ff;
    color: #4f46e5;
}

/* 카테고리 배지 */
.category-badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 500;
    color: white;
}

.category-문서 { background: #3b82f6; }
.category-이미지 { background: #10b981; }
.category-동영상 { background: #f59e0b; }
.category-프레젠테이션 { background: #ef4444; }
.category-기타 { background: #6b7280; }

/* 첨부파일 아이콘 */
.attachment-icon {
    font-size: 1.2rem;
    color: #10b981;
}

.attachment-icons {
    display: flex;
    flex-direction: column;
    gap: 4px;
    align-items: center;
    font-size: 0.85rem;
    line-height: 1.2;
    max-height: 100px;
    overflow-y: auto;
    padding: 2px;
}

.attachment-file-item {
    display: inline-flex;
    align-items: center;
    gap: 2px;
    cursor: pointer;
    padding: 3px 4px;
    border-radius: 3px;
    transition: background-color 0.2s ease;
    justify-content: center;
    white-space: nowrap;
}

.attachment-file-item:hover {
    background-color: #f0f9ff;
}

.attachment-file-icon {
    font-size: 1.1rem;
    width: auto;
    text-align: left;
    flex-shrink: 0;
    margin-right: 1px;
}

.attachment-file-info {
    display: flex;
    flex-direction: column;
    gap: 1px;
    flex: 1;
    min-width: 0;
    margin-left: 0;
}

.attachment-file-name {
    font-weight: 500;
    color: #374151;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-size: 0.8rem;
}

.attachment-file-size {
    color: #6b7280;
    font-size: 0.7rem;
}

.attachment-icon-clickable {
    cursor: pointer;
    transition: all 0.2s ease;
    padding: 2px;
    border-radius: 3px;
}

.attachment-icon-clickable:hover {
    background-color: #e0e7ff;
    transform: scale(1.1);
}

.no-attachment {
    color: #9ca3af;
}

/* 첨부파일 관리 스타일 */
.attachment-management {
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    padding: 20px;
    background: #f9fafb;
    gap: 20px;
    display: flex;
    flex-direction: column;
}

/* 섹션 제목 스타일 */
.section-title {
    font-size: 1rem;
    font-weight: 600;
    color: #374151;
    margin: 0 0 12px 0;
    padding-bottom: 8px;
    border-bottom: 2px solid #e5e7eb;
}

/* 기존 첨부파일 섹션 */
.existing-attachments-section {
    background: white;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    padding: 16px;
}

.existing-attachments {
    margin-top: 12px;
}

.no-existing-files {
    text-align: center;
    padding: 20px;
    color: #6b7280;
    font-style: italic;
}

.placeholder-text {
    font-size: 0.9rem;
}

/* 새 파일 추가 섹션 */
.new-attachments-section {
    background: white;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    padding: 16px;
}

/* 드래그&드롭 영역 */
.file-drop-zone {
    border: 2px dashed #d1d5db;
    border-radius: 8px;
    padding: 30px 20px;
    text-align: center;
    background: #f8fafc;
    transition: all 0.3s ease;
    cursor: pointer;
    margin-top: 12px;
}

.file-drop-zone:hover {
    border-color: #3b82f6;
    background: #eff6ff;
}

.file-drop-zone.dragover {
    border-color: #3b82f6;
    background: #dbeafe;
    transform: scale(1.02);
}

.drop-zone-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.drop-zone-icon {
    font-size: 3rem;
    opacity: 0.6;
}

.drop-zone-text p {
    margin: 4px 0;
    color: #374151;
}

.or-text {
    color: #6b7280;
    font-size: 0.9rem;
}

.file-select-btn {
    background: #3b82f6;
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.file-select-btn:hover {
    background: #2563eb;
    transform: translateY(-1px);
}

.drop-zone-hint {
    margin-top: 8px;
    color: #6b7280;
}

/* 새 파일 미리보기 */
.new-files-preview {
    margin-top: 16px;
    display: none;
}

.new-files-preview.show {
    display: block;
}

.preview-file-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px;
    background: #f0f9ff;
    border: 1px solid #bae6fd;
    border-radius: 6px;
    margin-bottom: 8px;
    transition: all 0.2s ease;
}

.preview-file-info {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
    min-width: 0;
}

.preview-file-icon {
    font-size: 1.2rem;
    flex-shrink: 0;
}

.preview-file-details {
    flex: 1;
    min-width: 0;
}

.preview-file-name {
    font-weight: 500;
    color: #0f172a;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.preview-file-size {
    color: #64748b;
    font-size: 0.85rem;
}

.preview-file-remove {
    background: #ef4444;
    color: white;
    border: none;
    padding: 6px 10px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.8rem;
    transition: all 0.2s ease;
}

.preview-file-remove:hover {
    background: #dc2626;
}

.attachment-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    background: white;
    border: 1px solid #e5e7eb;
    border-radius: 6px;
    margin-bottom: 8px;
    transition: all 0.2s ease;
}

.attachment-item:hover {
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    border-color: #3b82f6;
}

.attachment-info {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
}

.attachment-icon {
    font-size: 1.2rem;
}

.attachment-details {
    display: flex;
    flex-direction: column;
    gap: 2px;
    flex: 1;
}

.attachment-name {
    font-weight: 500;
    color: #1f2937;
    font-size: 0.9rem;
}

.attachment-size {
    color: #6b7280;
    font-size: 0.75rem;
}

.attachment-actions {
    display: flex;
    gap: 5px;
}

.attachment-delete-btn {
    padding: 4px 8px;
    background: #ef4444;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

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

/* 기존 new-attachment-section 및 add-btn 스타일 제거됨 - 새로운 구조로 대체 */

.attachment-preview {
    display: none;
    margin-top: 10px;
    padding: 10px;
    background: white;
    border: 1px solid #e5e7eb;
    border-radius: 4px;
    font-size: 0.85rem;
    color: #4b5563;
}

/* 액션 버튼 */
.action-buttons {
    display: flex;
    gap: 3px;
    justify-content: center;
    align-items: center;
}

.action-btn {
    padding: 4px 8px;
    border: none;
    border-radius: 3px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 500;
}

.btn-edit {
    background: #3b82f6;
    color: white;
}

.btn-edit:hover {
    background: #2563eb;
    transform: translateY(-1px);
}

.btn-delete {
    background: #ef4444;
    color: white;
}

.btn-delete:hover {
    background: #dc2626;
    transform: translateY(-1px);
}

.btn-download {
    background: #10b981;
    color: white;
}

.btn-download:hover {
    background: #059669;
    transform: translateY(-1px);
}

/* 빈 상태 */
.empty-state td {
    padding: 60px 20px;
    text-align: center;
    color: #6b7280;
    font-size: 1.1rem;
}

/* 상세보기 페이지 스타일 */
.detail-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    z-index: 1000;
    overflow-y: auto;
}

.detail-section {
    background: rgba(255, 255, 255, 0.95);
    padding: 30px;
    border-radius: 15px;
    margin-bottom: 30px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
}

.detail-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 15px;
}

.detail-header h2 {
    color: #4a5568;
    font-size: 2rem;
    margin: 0;
    flex: 1;
}

.detail-actions {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
}

.edit-detail-btn {
    padding: 10px 20px;
    background: #3b82f6;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.edit-detail-btn:hover {
    background: #2563eb;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.delete-detail-btn {
    padding: 10px 20px;
    background: #ef4444;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.delete-detail-btn:hover {
    background: #dc2626;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

.back-btn {
    padding: 12px 24px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.back-btn:hover {
    background: #5a67d8;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.detail-content {
    display: grid;
    gap: 20px;
}

.detail-info {
    display: grid;
    gap: 25px;
}

.info-group {
    display: grid;
    gap: 10px;
}

.info-group label {
    font-weight: 600;
    color: #4a5568;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.info-value {
    padding: 15px;
    background: #f8fafc;
    border-radius: 8px;
    border: 2px solid #e2e8f0;
    font-size: 1rem;
    line-height: 1.6;
}

.info-value.description {
    min-height: 80px;
    white-space: pre-wrap;
}

.info-value.no-files {
    color: #9ca3af;
    font-style: italic;
}

.tags-container {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    border: none;
}

.attachments-list {
    display: grid;
    gap: 12px;
    margin-bottom: 20px;
}

.attachment-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    background: white;
    border-radius: 8px;
    border: 1px solid #e5e7eb;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    transition: all 0.2s ease;
}

.attachment-item:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transform: translateY(-1px);
}

.attachment-icon {
    font-size: 1.5rem;
    min-width: 30px;
    text-align: center;
}

.attachment-info {
    display: flex;
    align-items: center;
    gap: 5px;
    justify-content: center;
}

.attachment-info .attachment-icon {
    font-size: 1.2rem;
    min-width: auto;
}

.attachment-count {
    font-size: 0.85rem;
    color: #6b7280;
}

/* 제목 링크 스타일 */
.title-link {
    color: #2563eb;
    text-decoration: none;
    font-weight: 600;
}

.title-link:hover {
    color: #1d4ed8;
    text-decoration: underline;
}

/* 관리자 페이지 첨부파일 목록 */
.attachment-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
    max-height: 120px;
    overflow-y: auto;
}

.attachment-item-admin {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 6px;
    background: #f8fafc;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s ease;
    border: 1px solid #e2e8f0;
}

.attachment-item-admin:hover {
    background: #e2e8f0;
    border-color: #cbd5e1;
    transform: translateY(-1px);
}

.attachment-file-icon {
    font-size: 0.9rem;
    min-width: 16px;
    text-align: center;
}

.attachment-file-name {
    flex: 1;
    font-size: 0.75rem;
    color: #475569;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 120px;
}

/* 모달 태그 스타일 */
.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 4px;
}

.tag-item {
    display: inline-block;
    background: #e5e7eb;
    color: #374151;
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
}

.attachment-name {
    flex: 1;
    font-weight: 500;
    color: #374151;
    word-break: break-all;
}

.download-single-btn {
    background: #10b981;
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.download-single-btn:hover {
    background: #059669;
    transform: scale(1.05);
}

.attachment-actions {
    padding-top: 15px;
    border-top: 1px solid #e5e7eb;
    text-align: center;
}

.download-all-btn {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.download-all-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.3);
}

/* 모바일 반응형 */
@media (max-width: 768px) {
    .detail-section {
        padding: 20px;
        margin: 10px;
        border-radius: 10px;
    }
    
    .detail-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .detail-header h2 {
        font-size: 1.5rem;
    }
    
    .detail-actions {
        width: 100%;
        justify-content: stretch;
    }
    
    .detail-actions button {
        flex: 1;
        min-width: 0;
    }
    
    .back-btn {
        order: 3;
        width: 100%;
        justify-content: center;
        margin-top: 10px;
    }
    
    .attachment-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .download-single-btn {
        align-self: stretch;
        text-align: center;
    }
}

/* 파일 업로드 영역 */
.file-upload-area {
    position: relative;
    border: 2px dashed #d1d5db;
    border-radius: 8px;
    padding: 30px 20px;
    text-align: center;
    background: #f9fafb;
    transition: all 0.3s ease;
    cursor: pointer;
}

.file-upload-area:hover {
    border-color: #667eea;
    background: #f0f4ff;
}

.file-upload-area.drag-over {
    border-color: #667eea;
    background: #e0e7ff;
    transform: scale(1.02);
}

.file-upload-area input[type="file"] {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.upload-placeholder {
    pointer-events: none;
}

.upload-icon {
    font-size: 3rem;
    margin-bottom: 15px;
}

.upload-placeholder p {
    margin: 8px 0;
    color: #374151;
}

.upload-placeholder strong {
    color: #667eea;
}

.upload-placeholder small {
    color: #6b7280;
    font-size: 0.85rem;
}

/* 선택된 파일 목록 */
.selected-files {
    margin-top: 15px;
}

.file-item-preview {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 15px;
    margin-bottom: 8px;
    background: white;
    border: 1px solid #e5e7eb;
    border-radius: 6px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

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

.file-icon {
    margin-right: 10px;
    font-size: 1.2rem;
}

.file-details {
    flex: 1;
}

.file-name {
    font-weight: 500;
    color: #374151;
    margin-bottom: 2px;
}

.file-size {
    font-size: 0.8rem;
    color: #6b7280;
}

.file-remove {
    background: #ef4444;
    color: white;
    border: none;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    cursor: pointer;
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.file-remove:hover {
    background: #dc2626;
    transform: scale(1.1);
}

.files-summary {
    margin-top: 10px;
    padding: 10px;
    background: #f0f9ff;
    border: 1px solid #bae6fd;
    border-radius: 4px;
    font-size: 0.9rem;
    color: #0369a1;
    text-align: center;
}

.file-list {
    /* 기존 grid 스타일 비활성화 */
}

.file-item {
    background: #f7fafc;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    padding: 20px;
    transition: all 0.3s ease;
    position: relative;
}

.file-item:hover {
    border-color: #667eea;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.15);
}

.file-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 15px;
    gap: 15px;
}

.file-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 5px;
}

.file-meta {
    display: flex;
    gap: 15px;
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 10px;
    flex-wrap: wrap;
    align-items: center;
}

.file-meta span {
    white-space: nowrap;
}

.file-description {
    color: #4a5568;
    margin-bottom: 15px;
    line-height: 1.5;
}

.file-tags {
    display: flex;
    gap: 8px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

.tag {
    background: #e6fffa;
    color: #234e52;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.85rem;
    border: 1px solid #b2f5ea;
}

.file-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    align-items: center;
    margin-top: 10px;
}

.file-actions button {
    padding: 8px 15px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    font-weight: 500;
}

.edit-btn {
    background: #3182ce;
    color: white;
}

.edit-btn:hover {
    background: #2c5282;
}

.delete-btn {
    background: #e53e3e;
    color: white;
}

.delete-btn:hover {
    background: #c53030;
}

.download-btn {
    background: #38a169;
    color: white;
}

.download-btn:hover {
    background: #2f855a;
}

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: #666;
}

.empty-state p {
    font-size: 1.2rem;
}

.modal {
    display: none;
    position: fixed;
    z-index: 10000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

#editCategoryModal {
    z-index: 10001;
}

.modal-content {
    background: white;
    margin: 5% auto;
    padding: 30px;
    border-radius: 15px;
    width: 90%;
    max-width: 600px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: modalSlideIn 0.3s ease;
}

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

.modal-content h2 {
    color: #4a5568;
    margin-bottom: 25px;
    font-size: 1.8rem;
}

.files-list {
    margin-top: 10px;
}

.file-attachment {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    background: #f7fafc;
    border-radius: 6px;
    margin-bottom: 5px;
    border: 1px solid #e2e8f0;
}

.file-attachment span {
    font-size: 0.9rem;
    color: #4a5568;
}

.remove-file {
    background: #e53e3e;
    color: white;
    border: none;
    border-radius: 4px;
    padding: 4px 8px;
    cursor: pointer;
    font-size: 0.8rem;
}

.remove-file:hover {
    background: #c53030;
}

.category-badge {
    background: #bee3f8;
    color: #2c5282;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    border: 1px solid #90cdf4;
}

@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .search-section {
        flex-direction: column;
        align-items: stretch;
    }
    
    .search-section input,
    .search-section select,
    .search-section button {
        width: 100%;
        min-width: auto;
    }
    
    .form-buttons {
        flex-direction: column;
    }
    
    .file-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .file-actions {
        justify-content: flex-start;
    }
    
    .list-header {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    .modal-content {
        margin: 10% auto;
        width: 95%;
        padding: 20px;
    }
    
    .file-actions {
        flex-direction: column;
    }
    
    .file-actions button {
        width: 100%;
    }
    
    .guest-mode-content {
        flex-direction: column;
        text-align: center;
    }
    
    .guest-login-btn {
        margin-top: 10px;
    }
    
    .notification {
        left: 10px;
        right: 10px;
        top: 10px;
        max-width: none;
        margin: 0;
    }
    
    .file-meta {
        gap: 8px;
    }
    
    .file-meta span {
        font-size: 0.8rem;
    }
    
    header h1 {
        font-size: 2rem;
    }
}

/* 알림 메시지 스타일 */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    max-width: 400px;
    padding: 15px 20px;
    border-radius: 8px;
    color: white;
    font-weight: 500;
    z-index: 10000;
    animation: slideInRight 0.3s ease, fadeOut 0.3s ease 2.7s;
    animation-fill-mode: forwards;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    word-wrap: break-word;
    line-height: 1.5;
    white-space: pre-line;
}

.notification.success {
    background: linear-gradient(135deg, #48bb78, #38a169);
    border-left: 4px solid #2f855a;
}

.notification.error {
    background: linear-gradient(135deg, #f56565, #e53e3e);
    border-left: 4px solid #c53030;
}

.notification.info {
    background: linear-gradient(135deg, #4299e1, #3182ce);
    border-left: 4px solid #2c5282;
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes fadeOut {
    from {
        opacity: 1;
    }
    to {
        opacity: 0;
        transform: translateX(100%);
    }
}

/* 페이지네이션 스타일 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    margin-top: 20px;
    padding: 20px 0;
}

.page-btn {
    padding: 10px 16px;
    border: 2px solid #667eea;
    background: white;
    color: #667eea;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.page-btn:hover:not(:disabled) {
    background: #667eea;
    color: white;
    transform: translateY(-1px);
}

.page-btn:disabled {
    background: #f3f4f6;
    color: #9ca3af;
    border-color: #d1d5db;
    cursor: not-allowed;
    transform: none;
}

#pageInfo {
    padding: 8px 12px;
    background: #f8fafc;
    border-radius: 6px;
    font-weight: 500;
    color: #4a5568;
    min-width: 60px;
    text-align: center;
}

/* 테이블 반응형 스타일 강화 */
@media (max-width: 1024px) {
    .board-table {
        font-size: 0.85rem;
    }
    
    .col-no { width: 50px; }
    .col-category { width: 80px; }
    .col-attachment { width: 180px; }
    .col-date { width: 100px; }
    .col-actions { width: 120px; }
    
    .action-btn {
        padding: 3px 6px;
        font-size: 0.75rem;
    }
    
    .attachment-file-name {
        font-size: 0.75rem;
    }
    
    .attachment-file-size {
        font-size: 0.65rem;
    }
}

@media (max-width: 768px) {
    .board-container {
        padding: 10px;
        overflow-x: auto;
    }
    
    .board-table {
        min-width: 700px;
        font-size: 0.8rem;
    }
    
    .board-table th,
    .board-table td {
        padding: 6px 8px;
    }
    
    .col-title {
        min-width: 180px;
    }
    
    .board-title {
        font-size: 0.9rem;
        line-height: 1.3;
    }
    
    .category-badge {
        font-size: 0.75rem;
        padding: 2px 6px;
    }
    
    .attachment-icons {
        max-height: 80px;
        font-size: 0.75rem;
    }
    
    .action-buttons {
        flex-direction: column;
        gap: 2px;
    }
    
    .action-btn {
        width: 100%;
        padding: 2px 4px;
        font-size: 0.7rem;
    }
    
    .pagination {
        flex-wrap: wrap;
        gap: 10px;
    }
    
    .page-btn {
        padding: 8px 12px;
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    .board-table {
        min-width: 600px;
    }
    
    .col-no { display: none; }
    .col-date { width: 80px; }
    .col-actions { width: 100px; }
    
    .board-table th:first-child,
    .board-table td:first-child {
        display: none;
    }
}

/* 모달 오버레이 및 상세보기 모달 스타일 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background: white;
    border-radius: 15px;
    width: 90%;
    max-width: 700px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: modalSlideIn 0.3s ease;
    position: relative;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-header {
    padding: 25px 30px 15px;
    border-bottom: 2px solid #f1f5f9;
    display: flex;
    justify-content: between;
    align-items: center;
}

.modal-header h3 {
    margin: 0;
    color: #1e293b;
    font-size: 1.5rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: #64748b;
    cursor: pointer;
    padding: 5px;
    border-radius: 50%;
    width: 35px;
    height: 35px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-left: auto;
}

.modal-close:hover {
    background: #f1f5f9;
    color: #334155;
}

.modal-body {
    padding: 20px 30px;
}

.info-group {
    margin-bottom: 20px;
}

.info-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: #374151;
    margin-bottom: 8px;
}

.info-value {
    font-size: 0.95rem;
    color: #1f2937;
    line-height: 1.5;
}

.modal-footer {
    padding: 20px 30px 30px;
    border-top: 1px solid #f1f5f9;
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-secondary {
    background: #e2e8f0;
    color: #475569;
}

.btn-secondary:hover {
    background: #cbd5e1;
}

.btn-primary {
    background: #3b82f6;
    color: white;
}

.btn-primary:hover {
    background: #2563eb;
}

.btn-danger {
    background: #ef4444;
    color: white;
}

.btn-danger:hover {
    background: #dc2626;
}

/* 모달 내 첨부파일 스타일 */
.attachments-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin: 10px 0;
}

.attachment-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: #f8fafc;
    border-radius: 8px;
    border: 1px solid #e2e8f0;
}

.attachment-name {
    flex: 1;
    font-weight: 500;
    color: #374151;
    word-break: break-all;
}

.download-single-btn {
    background: #10b981;
    color: white;
    border: none;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: background 0.2s ease;
}

.download-single-btn:hover {
    background: #059669;
}

.attachment-actions {
    margin-top: 15px;
    text-align: center;
}

.download-all-btn {
    background: #3b82f6;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s ease;
}

.download-all-btn:hover {
    background: #2563eb;
}

/* 탭 스타일 */
.section-tabs {
    display: flex;
    gap: 5px;
    margin-bottom: 20px;
    border-bottom: 2px solid #e2e8f0;
}

.tab-btn {
    background: none;
    border: none;
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 500;
    color: #718096;
    cursor: pointer;
    border-radius: 8px 8px 0 0;
    transition: all 0.3s ease;
    position: relative;
}

.tab-btn:hover {
    background: rgba(102, 126, 234, 0.1);
    color: #667eea;
}

.tab-btn.active {
    color: #667eea;
    background: white;
    box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.1);
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: #667eea;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* 카테고리 관리 스타일 */
.category-list-section {
    margin-top: 30px;
    background: rgba(255, 255, 255, 0.9);
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.category-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-height: 400px;
    overflow-y: auto;
}

.category-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: white;
    padding: 15px 20px;
    border-radius: 8px;
    border-left: 4px solid #667eea;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.category-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.category-name {
    font-weight: 500;
    color: #4a5568;
    font-size: 1.1rem;
}

.category-actions {
    display: flex;
    gap: 8px;
}

.btn-edit-category,
.btn-delete-category {
    background: none;
    border: none;
    padding: 8px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1.1rem;
    transition: all 0.3s ease;
}

.btn-edit-category {
    color: #3182ce;
    background: rgba(49, 130, 206, 0.1);
}

.btn-edit-category:hover {
    background: rgba(49, 130, 206, 0.2);
    transform: scale(1.1);
}

.btn-delete-category {
    color: #e53e3e;
    background: rgba(229, 62, 62, 0.1);
}

.btn-delete-category:hover {
    background: rgba(229, 62, 62, 0.2);
    transform: scale(1.1);
}

.empty-message {
    text-align: center;
    color: #718096;
    font-style: italic;
    padding: 40px;
    background: rgba(255, 255, 255, 0.7);
    border-radius: 8px;
}

/* 수정 모달 스타일 추가 */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(3px);
    align-items: center;
    justify-content: center;
}

.modal h2 {
    margin-bottom: 20px;
    color: #4a5568;
    text-align: center;
}

/* 반응형 */
@media (max-width: 768px) {
    .section-tabs {
        flex-direction: column;
        gap: 0;
    }
    
    .tab-btn {
        border-radius: 0;
    }
    
    .category-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .category-actions {
        align-self: flex-end;
    }
    .modal-content {
        width: 95%;
        max-height: 95vh;
    }
    
    .modal-header, .modal-body, .modal-footer {
        padding-left: 20px;
        padding-right: 20px;
    }
    
    .modal-footer {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
}

/* 로딩 오버레이 스타일 */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    backdrop-filter: blur(3px);
}

.loading-content {
    background: white;
    padding: 40px 60px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    max-width: 90%;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #2196F3;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

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

.loading-message {
    font-size: 16px;
    color: #333;
    font-weight: 500;
    margin-top: 15px;
}

/* 로딩 중 폼 비활성화 스타일 */
.loading-overlay + * form,
.loading-overlay + * button {
    pointer-events: none;
    opacity: 0.6;
    transition: opacity 0.3s ease;
}