:root {
    /* Light Theme (Default) */
    --bg-body: #F8F9FE; /* Tinted Lavender/White */
    --bg-card: #FFFFFF;
    --bg-secondary: #F0F2F5;
    
    /* Typography Colors */
    --text-primary: #333333; /* Main Body Text */
    --text-secondary: #555555;
    --text-muted: #888888;
    --text-heading: #0D21A5; /* Dark Blue for Headings */
    
    --border-color: #E0E0E0;
    
    /* Brand Colors */
    --primary-color: #B9C7F8; /* Lavender (Main Brand Color) */
    --primary-text: #0D21A5;  /* Text on Lavender Background */
    --primary-hover: #A3B1E8; /* Slightly darker lavender */
    
    --accent-color: #0D21A5;  /* Dark Blue (Actions, Links, Strong Text) */
    --accent-hover: #09187A;
    
    --highlight-color: #D1D067; /* Golden Yellow (Badges, Highlights) */
    --highlight-text: #333333;
    
    --success-color: #4CAF50;
    --danger-color: #DC3545;
    --warning-color: #FFC107;
    
    --input-bg: #FFFFFF;
    --input-border: #CED4DA;
    --shadow-sm: 0 .125rem .25rem rgba(13, 33, 165, 0.08);
    --shadow-md: 0 .5rem 1rem rgba(13, 33, 165, 0.12);
}

[data-theme="dark"] {
    /* Dark Theme */
    --bg-body: #121212;
    --bg-card: #1E1E1E;
    --bg-secondary: #252525;
    --text-primary: #E0E0E0;
    --text-secondary: #B0B0B0;
    --text-muted: #777777;
    --text-heading: #B9C7F8; /* Lavender Headings in Dark Mode */
    
    --border-color: #333333;
    
    --primary-color: #2C3E50; /* Darker Slate for primary bg in dark mode? Or stick to Lavender? */
    /* Let's keep Brand Identity but adapted */
    --primary-color: #3E4E88; /* Muted Dark Blue */
    --primary-text: #E0E0E0;
    
    --accent-color: #B9C7F8; /* Lavender as Accent in Dark Mode */
    --accent-hover: #D1D067;
    
    --highlight-color: #D1D067;
    
    --input-bg: #2C2C2C;
    --input-border: #444444;
    --shadow-sm: 0 .125rem .25rem rgba(0,0,0,.5);
    --shadow-md: 0 .5rem 1rem rgba(0,0,0,.5);
}

body {
    background-color: var(--bg-body) !important;
    color: var(--text-primary) !important;
    font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    transition: background-color 0.4s ease, color 0.4s ease;
}

.card, .navbar, .dropdown-menu, .modal-content {
    background-color: var(--bg-card) !important;
    color: var(--text-primary) !important;
    border-color: var(--border-color) !important;
    transition: background-color 0.4s ease, border-color 0.4s ease, color 0.4s ease;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--text-heading) !important;
    font-weight: 700;
}

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--accent-hover);
}

p, span, div {
    color: inherit;
}

.text-muted {
    color: var(--text-muted) !important;
}

.text-primary {
    color: var(--accent-color) !important; /* Map Bootstrap text-primary to our Accent (Dark Blue) for readability */
}

/* Inputs */
.form-control, .form-select {
    background-color: var(--input-bg) !important;
    color: var(--text-primary) !important;
    border-color: var(--input-border) !important;
}

.form-control::placeholder {
    color: var(--text-muted) !important;
}

.form-control:focus, .form-select:focus {
    background-color: var(--input-bg) !important;
    color: var(--text-primary) !important;
    border-color: var(--accent-color) !important;
    box-shadow: 0 0 0 0.25rem rgba(13, 33, 165, 0.25);
}

/* Buttons */
.btn-primary {
    background-color: var(--primary-color) !important;
    border-color: var(--primary-color) !important;
    color: var(--primary-text) !important;
    font-weight: 600;
}

.btn-primary:hover {
    background-color: var(--primary-hover) !important;
    border-color: var(--primary-hover) !important;
    color: var(--primary-text) !important;
}

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

.btn-outline-primary:hover {
    background-color: var(--accent-color) !important;
    color: #FFFFFF !important;
}

/* Secondary Button using Highlight Color? Or Neutral? */
.btn-secondary {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: #E2E6EA;
    color: var(--text-primary);
}

/* Navbar */
.navbar-light .navbar-nav .nav-link {
    color: var(--text-secondary) !important;
    font-weight: 500;
}

.navbar-light .navbar-nav .nav-link:hover, .navbar-light .navbar-nav .nav-link.active {
    color: var(--accent-color) !important;
}

.navbar-brand {
    color: var(--accent-color) !important;
    font-weight: 800;
}

/* Utility */
.bg-light {
    background-color: var(--bg-secondary) !important;
}

.bg-white {
    background-color: var(--bg-card) !important;
}

.border-top, .border-bottom, .border {
    border-color: var(--border-color) !important;
}

.shadow-sm {
    box-shadow: var(--shadow-sm) !important;
}

/* Badges */
.badge.bg-primary {
    background-color: var(--primary-color) !important;
    color: var(--primary-text) !important;
}

.badge.bg-secondary {
    background-color: var(--bg-secondary) !important;
    color: var(--text-primary) !important;
}

.badge.bg-warning {
    background-color: var(--highlight-color) !important;
    color: var(--highlight-text) !important;
}