:root {
    --bg-body: #f8f9fa;
    --bg-card: #ffffff;
    --bg-input: #ffffff;
    --bg-code: #f1f3f5;
    --bg-hover: #f1f3f5;
    --bg-active: #e9ecef;
    --bg-navbar: #ffffff;
    --bg-footer: #f8f9fa;
    --text-primary: #212529;
    --text-secondary: #495057;
    --text-muted: #6c757d;
    --border-light: #dee2e6;
    --shadow-card: 0 4px 12px rgba(0, 0, 0, 0.08);
    --icon-color: #6c757d;
    --btn-dark-bg: #212529;
    --btn-dark-text: #ffffff;
    --link-color: #0d6efd;
    --rating-star: #ffc107;
    --rating-star-empty: #dee2e6;
    --close-filter: none;
}

[data-theme="dark"] {
    --bg-body: #121212;
    --bg-card: #1e1e1e;
    --bg-input: #2d2d2d;
    --bg-code: #2d2d2d;
    --bg-hover: #2d2d2d;
    --bg-active: #3d3d3d;
    --bg-navbar: #1a1a1a;
    --bg-footer: #1a1a1a;
    --text-primary: #e9ecef;
    --text-secondary: #ced4da;
    --text-muted: #adb5bd;
    --border-light: #3d3d3d;
    --shadow-card: 0 4px 12px rgba(0, 0, 0, 0.4);
    --icon-color: #adb5bd;
    --btn-dark-bg: #f8f9fa;
    --btn-dark-text: #212529;
    --link-color: #6ea8fe;
    --rating-star: #ffc107;
    --rating-star-empty: #3d3d3d;
    --close-filter: invert(1) grayscale(100%) brightness(200%);
}

body {
    background-color: var(--bg-body);
    color: var(--text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}

.navbar {
    background-color: var(--bg-navbar) !important;
    border-bottom: 1px solid var(--border-light);
}

.navbar .nav-link {
    color: var(--text-secondary) !important;
}

.navbar .nav-link:hover {
    color: var(--text-primary) !important;
}

.navbar-brand {
    color: var(--text-primary) !important;
}

.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    box-shadow: var(--shadow-card);
}

.form-control {
    background-color: var(--bg-input);
    border-color: var(--border-light);
    color: var(--text-primary);
}

.form-control:focus {
    border-color: var(--link-color);
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

footer {
    background-color: var(--bg-footer);
    border-top: 1px solid var(--border-light);
    padding: 20px 0;
    color: var(--text-secondary);
}

#chatWidget button:hover {
    transform: scale(1.05);
}

@media (max-width: 768px) {
    #chatWindow {
        width: 300px !important;
        right: -10px !important;
    }
}