:root {
    --bg-primary: #0d0d0d;
    --bg-secondary: #141414;
    --bg-tertiary: #1a1a1a;
    --bg-elevated: #1f1f1f;
    --border-primary: #2a2a2a;
    --border-secondary: #333333;
    --text-primary: #ffffff;
    --text-secondary: #a1a1a1;
    --text-tertiary: #666666;
    --accent-primary: #5e6ad2;
    --accent-secondary: #6d75db;
    --accent-success: #10b981;
    --accent-warning: #f59e0b;
    --accent-danger: #ef4444;
    --accent-info: #3b82f6;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

.app-container {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 260px;
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-primary);
    padding: 24px 0;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.main-content {
    flex: 1;
    margin-left: 260px;
    padding: 32px;
    background-color: var(--bg-primary);
}

.sidebar-header {
    padding: 0 20px 24px;
    border-bottom: 1px solid var(--border-primary);
    margin-bottom: 24px;
}

.sidebar-logo {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

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

.sidebar-nav-item {
    margin: 4px 12px;
}

.sidebar-nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all 0.2s;
    font-size: 14px;
}

.sidebar-nav-link:hover,
.sidebar-nav-link.active {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.sidebar-nav-link.active {
    background-color: var(--accent-primary);
    color: white;
}

.page-header {
    margin-bottom: 32px;
}

.page-title {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

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

.card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 24px;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 16px;
}

.card-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.stat-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    padding: 20px;
}

.stat-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
}

.stat-label {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
}

.stat-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-tertiary);
}

.stat-value {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    font-family: var(--font-family);
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    text-decoration: none;
}

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

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

.btn-secondary {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-primary);
}

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

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

.btn-danger:hover {
    opacity: 0.9;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

.table-container {
    overflow-x: auto;
}

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

.table th,
.table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-primary);
}

.table th {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.table td {
    font-size: 14px;
}

.table tr:hover {
    background-color: var(--bg-tertiary);
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.badge-success {
    background-color: rgba(16, 185, 129, 0.15);
    color: var(--accent-success);
}

.badge-warning {
    background-color: rgba(245, 158, 11, 0.15);
    color: var(--accent-warning);
}

.badge-danger {
    background-color: rgba(239, 68, 68, 0.15);
    color: var(--accent-danger);
}

.badge-info {
    background-color: rgba(59, 130, 246, 0.15);
    color: var(--accent-info);
}

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

.form-label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 12px 16px;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 14px;
    font-family: var(--font-family);
    transition: all 0.2s;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
}

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

.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-primary);
}

.login-box {
    width: 100%;
    max-width: 420px;
    padding: 40px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
}

.login-header {
    text-align: center;
    margin-bottom: 32px;
}

.login-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 8px;
}

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

.alert {
    padding: 12px 16px;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    font-size: 14px;
}

.alert-error {
    background-color: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--accent-danger);
    color: var(--accent-danger);
}

.alert-success {
    background-color: rgba(16, 185, 129, 0.1);
    border: 1px solid var(--accent-success);
    color: var(--accent-success);
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.mb-4 { margin-bottom: 16px; }
.mt-4 { margin-top: 16px; }
.text-success { color: var(--accent-success); }
.text-warning { color: var(--accent-warning); }
.text-danger { color: var(--accent-danger); }

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s;
    }
    
    .main-content {
        margin-left: 0;
        padding: 20px;
    }
    
    .stats-grid,
    .grid-2,
    .grid-3 {
        grid-template-columns: 1fr;
    }
}