:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #64748b;
    --success-color: #059669;
    --danger-color: #dc2626;
    --warning-color: #d97706;
    --info-color: #0891b2;
    --dark-color: #1e293b;
    --light-color: #f8fafc;
    --border-color: #e2e8f0;
    --sidebar-width: 280px;
    --header-height: 70px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--light-color);
    color: var(--dark-color);
    line-height: 1.6;
}

.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    background: white;
    border-right: 1px solid var(--border-color);
    position: fixed;
    left: 0;
    top: 0;
    z-index: 1000;
    transition: transform 0.3s ease;
}

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

.brand {
    display: flex;
    align-items: center;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

.brand i {
    font-size: 1.5rem;
    margin-right: 0.5rem;
}

.sidebar-toggle {
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--secondary-color);
    cursor: pointer;
    display: none;
}

.sidebar-content {
    padding: 1rem 0;
    height: calc(100vh - 90px);
    overflow-y: auto;
}

.sidebar .nav-link {
    display: flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    color: var(--secondary-color);
    text-decoration: none;
    transition: all 0.2s ease;
    border: none;
    background: none;
}

.sidebar .nav-link:hover {
    background-color: var(--light-color);
    color: var(--primary-color);
}

.sidebar .nav-link.active {
    background-color: var(--primary-color);
    color: white;
    border-right: 3px solid var(--primary-dark);
}

.sidebar .nav-link i {
    width: 20px;
    margin-right: 0.75rem;
    font-size: 1.1rem;
}

.sidebar-footer {
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.info-section h6 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 0.75rem;
}

.info-list {
    list-style: none;
    font-size: 0.8rem;
    color: var(--secondary-color);
}

.info-list li {
    margin-bottom: 0.25rem;
}

.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    display: none;
}

.main-content {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    transition: margin-left 0.3s ease;
}

.top-header {
    height: var(--header-height);
    background: white;
    border-bottom: 1px solid var(--border-color);
    padding: 0 2rem;
    display: flex;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.page-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--dark-color);
}

.header-actions .btn {
    border: none;
    background: none;
    color: var(--secondary-color);
    font-size: 1.1rem;
}

.content-wrapper {
    padding: 2rem;
}

.btn {
    border-radius: 8px;
    font-weight: 500;
    padding: 0.625rem 1.25rem;
    transition: all 0.2s ease;
    border: 1px solid transparent;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-1px);
}

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

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

.btn-outline-primary {
    color: var(--primary-color);
    border-color: var(--primary-color);
    background: transparent;
}

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

.card {
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background: white;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.badge {
    font-size: 0.75rem;
    padding: 0.375rem 0.75rem;
    border-radius: 6px;
    font-weight: 500;
}

.alert {
    border: none;
    border-radius: 8px;
    padding: 1rem 1.25rem;
}

.alert-success {
    background-color: #ecfdf5;
    color: var(--success-color);
}

.alert-danger {
    background-color: #fef2f2;
    color: var(--danger-color);
}

.alert-info {
    background-color: #f0f9ff;
    color: var(--info-color);
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.show {
        transform: translateX(0);
    }
    
    .sidebar-overlay.show {
        display: block;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .content-wrapper {
        padding: 1rem;
    }
    
    .top-header {
        padding: 0 1rem;
    }
    
    .sidebar-toggle {
        display: block;
    }
}

@media (max-width: 576px) {
    .page-title {
        font-size: 1.25rem;
    }
    
    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }
}