:root {
    --color-primary: #021064;
    --color-primary-fixed: #dfe0ff;
    --color-secondary: #5542d6;
    --color-background: #f9f9ff;
    --color-surface: #ffffff;
    --color-surface-container-low: #f1f3ff;
    --color-surface-container-lowest: #ffffff;
    --color-surface-container-high: #e1e8fd;
    --color-on-surface: #141b2b;
    --color-on-surface-variant: #454651;
    --color-outline-variant: #c6c5d3;
    --color-error: #ba1a1a;
    --color-error-container: #ffdad6;
    --sidebar-width: 240px;
    --header-height: 64px;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--color-background);
    color: var(--color-on-surface);
}

.bg-surface { background-color: var(--color-surface); }
.bg-primary { background-color: var(--color-primary); }
.text-primary { color: var(--color-primary) !important; }
.text-secondary { color: var(--color-secondary) !important; }
.text-on-surface { color: var(--color-on-surface); }
.text-on-surface-variant { color: var(--color-on-surface-variant); }
.border-outline-variant { border-color: var(--color-outline-variant) !important; }

.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background-color: var(--color-surface);
    border-right: 1px solid var(--color-outline-variant);
    z-index: 1040;
    overflow-y: auto;
}

.topbar {
    position: fixed;
    top: 0;
    right: 0;
    width: calc(100% - var(--sidebar-width));
    height: var(--header-height);
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-outline-variant);
    z-index: 1030;
}

.main-content {
    margin-left: var(--sidebar-width);
    margin-top: var(--header-height);
    padding: 2rem;
    min-height: calc(100vh - var(--header-height));
}

.stat-card {
    background-color: #FFFFFF;
    border: 1px solid #E5E7EB;
    border-radius: 12px;
}

.sidebar .nav-link {
    color: var(--color-on-surface-variant);
    border-radius: 0.5rem;
    padding: 0.75rem 1rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 4px;
    transition: all 0.2s ease-in-out;
}

.sidebar .nav-link:hover {
    background-color: var(--color-surface-container-low);
    color: var(--color-on-surface);
}

.sidebar .nav-link.active {
    background-color: var(--color-surface-container-high);
    color: var(--color-secondary);
    font-weight: 600;
}

.sidebar .nav-link .material-symbols-outlined {
    font-size: 20px;
}