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

:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --dark-bg: #1e293b;
    --light-bg: #f8fafc;
    --border-color: #e2e8f0;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --sidebar-width: 260px;
}

body {
    font-family: 'Noto Sans KR', sans-serif;
    background: var(--light-bg);
    color: var(--text-primary);
    display: flex;
    min-height: 100vh;
}

/* 사이드바 */
.sidebar {
    width: var(--sidebar-width);
    background: var(--dark-bg);
    color: white;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    z-index: 1000;
}

.sidebar-header {
    padding: 2rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-header i {
    font-size: 2rem;
    color: var(--primary-color);
}

.sidebar-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
}

.sidebar-menu {
    list-style: none;
    padding: 1rem 0;
}

.sidebar-menu li {
    margin: 0.25rem 0;
}

.sidebar-menu a {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.5rem;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: all 0.3s;
}

.sidebar-menu a:hover {
    background: rgba(255, 255, 255, 0.05);
    color: white;
}

.sidebar-menu li.active a {
    background: var(--primary-color);
    color: white;
}

.sidebar-menu i {
    width: 20px;
    font-size: 1.2rem;
}

/* 메인 컨텐츠 */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    padding: 2rem;
    width: calc(100% - var(--sidebar-width));
}

.content-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.content-header h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1rem;
}

.user-info i {
    font-size: 2rem;
    color: var(--primary-color);
}

/* 통계 카드 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    gap: 1.5rem;
    transition: transform 0.3s, box-shadow 0.3s;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    color: white;
}

.stat-details h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.stat-details p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* 차트 섹션 */
.charts-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.chart-container {
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.chart-container h2 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

/* 최근 활동 */
.recent-activities {
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.recent-activities h2 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.activity-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.activity-item {
    padding: 1rem;
    border-left: 3px solid var(--primary-color);
    background: var(--light-bg);
    border-radius: 4px;
}

.activity-item .activity-date {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.activity-item .activity-text {
    color: var(--text-primary);
}

/* 공통 컴포넌트 */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: var(--secondary-color);
}

.btn-success {
    background: var(--success-color);
    color: white;
}

.btn-danger {
    background: var(--danger-color);
    color: white;
}

.btn-secondary {
    background: var(--text-secondary);
    color: white;
}

/* 테이블 스타일 */
.table-container {
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.table-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.table-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
}

.search-bar {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.search-bar input {
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    min-width: 300px;
}

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

thead {
    background: var(--light-bg);
}

th {
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 2px solid var(--border-color);
}

td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

tbody tr:hover {
    background: var(--light-bg);
}

/* 모달 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.modal-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
}

.close-modal {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
}

/* 폼 스타일 */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
}

.form-group textarea {
    min-height: 100px;
    resize: vertical;
}

.form-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    margin-top: 2rem;
}

/* 배지 */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 500;
}

.badge-success {
    background: #d1fae5;
    color: #065f46;
}

.badge-warning {
    background: #fef3c7;
    color: #92400e;
}

.badge-danger {
    background: #fee2e2;
    color: #991b1b;
}

.badge-info {
    background: #dbeafe;
    color: #1e40af;
}

/* 액션 버튼 */
.action-buttons {
    display: flex;
    gap: 0.5rem;
}

.icon-btn {
    background: none;
    border: none;
    padding: 0.5rem;
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.3s;
    color: var(--text-secondary);
}

.icon-btn:hover {
    background: var(--light-bg);
    color: var(--primary-color);
}

.icon-btn.danger:hover {
    color: var(--danger-color);
}

/* 데이터 없음 */
.no-data {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* 반응형 */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .main-content {
        margin-left: 0;
        width: 100%;
    }

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

    .charts-section {
        grid-template-columns: 1fr;
    }

    .search-bar {
        flex-direction: column;
        width: 100%;
    }

    .search-bar input {
        width: 100%;
        min-width: unset;
    }
}