:root {
    --primary-color: #3B82F6;
    --primary-hover: #2563EB;
    --bg-color: #F9FAFB;
    --card-bg: #FFFFFF;
    --text-main: #1F2937;
    --text-muted: #6B7280;
    --border-color: #E5E7EB;
    --border-radius: 16px;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --sidebar-width: 260px;
}

body { 
    font-family: 'Urbanist', 'Inter', sans-serif; 
    background-color: var(--bg-color); 
    color: var(--text-main);
    overflow-x: hidden;
}

.navbar {
    background-color: var(--card-bg) !important;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
}
.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--primary-color) !important;
    letter-spacing: -0.025em;
}
.nav-link {
    color: var(--text-muted) !important;
    font-weight: 500;
}
.nav-link:hover { color: var(--primary-color) !important; }

.sidebar { 
    min-height: calc(100vh - 72px); 
    background-color: var(--card-bg); 
    border-right: 1px solid var(--border-color);
    padding: 1.5rem 1rem;
}
.sidebar .nav-link { 
    color: var(--text-muted) !important; 
    padding: 0.75rem 1rem; 
    border-radius: 12px;
    margin-bottom: 0.25rem;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    font-weight: 500;
}
.sidebar .nav-link i { font-size: 1.25rem; margin-right: 0.75rem; }
.sidebar .nav-link:hover { 
    background-color: #F3F4F6; 
    color: var(--primary-color) !important; 
}
.sidebar .nav-link.active { 
    background-color: rgba(59, 130, 246, 0.1); 
    color: var(--primary-color) !important; 
}

.card {
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    background-color: var(--card-bg);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.card:hover { transform: translateY(-2px); box-shadow: var(--shadow); }

.btn-primary {
    background-color: var(--primary-color);
    border: none;
    border-radius: 12px;
    padding: 0.6rem 1.5rem;
    font-weight: 600;
    transition: all 0.2s ease;
}
.btn-primary:hover { background-color: var(--primary-hover); transform: translateY(-1px); }

.btn-pill { border-radius: 50px !important; }

main { padding-top: 1rem; }
.h2, h2 { font-weight: 700; letter-spacing: -0.025em; color: var(--text-main); }