:root {
    /* 
     * Base Dark Theme (Default) 
     * Providing a sleek, professional aesthetic.
     */
    --bg-color: #121212; 
    --surface-color: #1e1e1e; 
    --text-color: #f0f0f0;
    --text-muted: #a0a0a0;
    --border-color: #2a2a2a;
    
    /* Accent Color extracted from the provided Logo (Gold/Mustard) */
    --accent-color: #d4a32a; 
    --accent-hover: #e8b931;
    --accent-active: #b58920;
    
    /* Logo switching */
    /* When in the default dark theme, we use the normal colorful logo */
    --logo-url: url('../images/logo_colorful.png');
}

/* 
 * Other Themes (e.g. Light Theme)
 */
[data-theme="light"], [data-theme="colorful"] {
    --bg-color: #f7f7f8;
    --surface-color: #ffffff;
    --text-color: #1a1a1a;
    --text-muted: #666666;
    --border-color: #e5e5e5;
    
    /* When outside of the dark theme, we seamlessly switch to the white logo */
    --logo-url: url('../images/logo_white.png');
}

/* Global Styles using variables */
body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Inter', 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    padding: 0;
    /* Smooth transition when switching themes */
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Brand Logo Component */
.brand-logo {
    display: inline-block;
    width: 150px; 
    height: 50px;
    background-image: var(--logo-url);
    background-size: contain;
    background-repeat: no-repeat;
    background-position: left center;
    transition: background-image 0.3s ease;
}

/* Example button using accent */
.btn-primary {
    background-color: var(--accent-color);
    color: #121212; /* High contrast text for gold button */
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.1s ease;
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-1px);
}