/* Custom variables */
:root {
    --sidebar-width: 280px;
    --header-height: 60px;
    --primary-color: #2563eb;
    --secondary-color: #475569;
}

/* General styles */
body {
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    background: #fff;
    border-right: 1px solid rgba(0,0,0,.1);
    z-index: 1000;
    transition: transform .3s ease;
}

.sidebar-header {
    height: var(--header-height);
    padding: 1rem;
    border-bottom: 1px solid rgba(0,0,0,.1);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--secondary-color);
}

.sidebar-logo img {
    height: 32px;
    width: auto;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--secondary-color);
    text-decoration: none;
    transition: all .2s ease;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
    background: rgba(37, 99, 235, 0.1);
}

.nav-link i {
    width: 1.5rem;
    text-align: center;
}

/* Main content */
.main-content {
    margin-left: var(--sidebar-width);
    padding: 2rem;
    min-height: 100vh;
}

/* Cards */
.card {
    border: none;
    box-shadow: 0 1px 3px rgba(0,0,0,.1);
}

.card-header {
    background: transparent;
    border-bottom: 1px solid rgba(0,0,0,.1);
    padding: 1rem;
}

/* Tables */
.table th {
    font-weight: 600;
    background: #f8fafc;
}

/* Forms */
.form-control:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(37, 99, 235, 0.25);
}

/* Buttons */
.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background-color: #1d4ed8;
    border-color: #1d4ed8;
}

/* Charts */
.chart-container {
    position: relative;
    height: 400px;
    margin-bottom: 2rem;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.show {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
}

/* Animations */
.fade-enter {
    opacity: 0;
}

.fade-enter-active {
    opacity: 1;
    transition: opacity 200ms ease-in;
}

/* Loading states */
.loading {
    position: relative;
}

.loading::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255,255,255,0.8);
    display: flex;
    align-items: center;
    justify-content: center;
}