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

:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #64748b;
    --success-color: #22c55e;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --bg-color: #f1f5f9;
    --card-bg: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --sidebar-width: 250px;
}

body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: linear-gradient(180deg, #1e293b 0%, #334155 100%);
    color: white;
    position: fixed;
    height: 100vh;
    padding: 20px 0;
    overflow-y: auto;
}

.logo {
    padding: 10px 25px 30px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    margin-bottom: 20px;
}

.logo h2 {
    font-size: 28px;
    font-weight: 700;
    color: #60a5fa;
}

.logo span {
    font-size: 14px;
    color: #94a3b8;
}

.nav-menu {
    list-style: none;
}

.nav-item {
    padding: 15px 25px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: all 0.2s;
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background: rgba(255,255,255,0.1);
}

.nav-item.active {
    background: rgba(96, 165, 250, 0.2);
    border-left-color: #60a5fa;
}

.nav-item .icon {
    font-size: 18px;
}

/* Main Content */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    min-height: 100vh;
}

.top-bar {
    background: var(--card-bg);
    padding: 20px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.top-bar h1 {
    font-size: 24px;
    font-weight: 600;
}

.content {
    padding: 30px;
}

/* Cards */
.card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 24px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}

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

.card-title {
    font-size: 18px;
    font-weight: 600;
}

/* Dashboard Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 24px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.stat-card .label {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.stat-card .value {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-card .change {
    font-size: 13px;
    margin-top: 8px;
}

.stat-card .change.positive {
    color: var(--success-color);
}

.stat-card .change.negative {
    color: var(--danger-color);
}

/* Tables */
.table-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
    border: 1px solid var(--border-color);
}

th, td {
    padding: 12px 16px;
    text-align: center;
    border: 1px solid var(--border-color);
}

th {
    background: #f8fafc;
    font-weight: 600;
    color: var(--text-secondary);
    position: sticky;
    top: 0;
    text-align: center;
}

tr:hover {
    background: #f8fafc;
}

.text-right {
    text-align: right;
}

.text-center {
    text-align: center;
}

/* Upload Area */
.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 40px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    background: #fafafa;
}

.upload-area:hover {
    border-color: var(--primary-color);
    background: #f0f7ff;
}

.upload-area.dragover {
    border-color: var(--primary-color);
    background: #e0f0ff;
}

.upload-area .icon {
    font-size: 48px;
    margin-bottom: 15px;
}

.upload-area h3 {
    margin-bottom: 8px;
    color: var(--text-primary);
}

.upload-area p {
    color: var(--text-secondary);
    font-size: 14px;
}

.upload-area input[type="file"] {
    display: none;
}

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

.upload-progress .progress-bar {
    height: 12px;
    margin-bottom: 10px;
}

.upload-result {
    margin-top: 20px;
    padding: 15px;
    border-radius: 8px;
}

.upload-result.success {
    background: #dcfce7;
    color: #166534;
}

.upload-result.error {
    background: #fee2e2;
    color: #991b1b;
}

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

.btn-success:hover {
    background: #16a34a;
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: white;
    border-radius: 16px;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.9);
    transition: transform 0.3s;
}

.modal-overlay.active .modal {
    transform: scale(1);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: 18px;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 0;
    line-height: 1;
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 24px;
}

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

/* Filters */
.filters {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.filter-group label {
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 500;
}

.filter-group input,
.filter-group select {
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    min-width: 150px;
}

.filter-group input:focus,
.filter-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
}

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

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

.btn-secondary {
    background: #e2e8f0;
    color: var(--text-primary);
}

/* Charts Container */
.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 20px;
}

/* Badge */
.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.badge-blue {
    background: #dbeafe;
    color: #1d4ed8;
}

.badge-green {
    background: #dcfce7;
    color: #166534;
}

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

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-top: 20px;
}

.pagination button {
    padding: 8px 16px;
    border: 1px solid var(--border-color);
    background: white;
    border-radius: 6px;
    cursor: pointer;
}

.pagination button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.pagination span {
    color: var(--text-secondary);
    font-size: 14px;
}

/* Loading */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 60px;
    color: var(--text-secondary);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        width: 70px;
        padding: 15px 0;
    }

    .sidebar .logo span,
    .sidebar .nav-item span:last-child {
        display: none;
    }

    .sidebar .logo h2 {
        font-size: 18px;
        text-align: center;
    }

    .sidebar .nav-item {
        justify-content: center;
        padding: 15px;
    }

    .main-content {
        margin-left: 70px;
    }

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

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

    .filters {
        flex-direction: column;
    }
}

/* Money formatting */
.money {
    font-family: 'Roboto Mono', monospace;
}

/* Progress bar */
.progress-bar {
    height: 8px;
    background: #e2e8f0;
    border-radius: 4px;
    overflow: hidden;
}

.progress-bar .fill {
    height: 100%;
    background: var(--primary-color);
    border-radius: 4px;
    transition: width 0.3s ease;
}

/* Rank list */
.rank-list {
    list-style: none;
}

.rank-item {
    display: flex;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
}

.rank-item:last-child {
    border-bottom: none;
}

.rank-number {
    width: 28px;
    height: 28px;
    background: #e2e8f0;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 600;
    margin-right: 12px;
}

.rank-item:nth-child(1) .rank-number {
    background: #fef3c7;
    color: #92400e;
}

.rank-item:nth-child(2) .rank-number {
    background: #e2e8f0;
    color: #475569;
}

.rank-item:nth-child(3) .rank-number {
    background: #fed7aa;
    color: #9a3412;
}

.rank-info {
    flex: 1;
}

.rank-name {
    font-weight: 500;
    margin-bottom: 2px;
}

.rank-detail {
    font-size: 12px;
    color: var(--text-secondary);
}

.rank-value {
    font-weight: 600;
    font-size: 15px;
}