:root {
    /* Colors - Indigo/Blue Palette */
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #3b82f6;
    --accent: #10b981;
    
    /* Backgrounds */
    --bg-main: #f8fafc;
    --bg-sidebar: #0f172a;
    --bg-card: rgba(255, 255, 255, 0.8);
    
    /* Text */
    --text-main: #1e293b;
    --text-muted: #64748b;
    --text-on-dark: #f8fafc;
    
    /* Borders & Glass */
    --border-light: rgba(255, 255, 255, 0.2);
    --border-dark: rgba(0, 0, 0, 0.05);
    --glass-blur: blur(12px);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.07);
    
    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
}

/* Base Styles */
body {
    font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    margin: 0;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
}

/* Glassmorphism Components */
.glass-card {
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border-light);
    box-shadow: var(--glass-shadow);
    border-radius: 16px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.glass-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px 0 rgba(31, 38, 135, 0.1);
}

/* Sidebar Overhaul */
.sidebar {
    min-height: 100vh;
    background: var(--bg-sidebar);
    color: var(--text-on-dark);
    padding-top: var(--space-md);
}

.sidebar .navbar-brand {
    font-family: 'Outfit', sans-serif;
    font-size: 1.5rem;
    padding: var(--space-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: var(--space-lg);
    display: flex;
    align-items: center;
    gap: 12px;
}

.sidebar a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    padding: 12px 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: all 0.2s ease;
    border-radius: 0 24px 24px 0;
    margin-right: 12px;
}

.sidebar a:hover, .sidebar a.active {
    background: rgba(99, 102, 241, 0.15);
    color: var(--primary-light);
    font-weight: 600;
}

.sidebar a.active {
    border-left: 4px solid var(--primary);
}

/* Form Styles */
.form-control, .form-select {
    border-radius: 10px;
    border: 1px solid #e2e8f0;
    padding: 10px 16px;
    transition: all 0.2s ease;
}

.form-control:focus {
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
    border-color: var(--primary);
}

/* Button Modernization */
.btn-primary {
    background-color: var(--primary);
    border: none;
    border-radius: 12px;
    padding: 10px 24px;
    font-weight: 600;
    transition: all 0.2s ease;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.2);
}