[data-bs-theme="dark"] {
    --bs-body-bg: #121212;
    --bs-body-color: #ffffff;
}

[data-bs-theme="dark"] .navbar {
    --bs-navbar-bg: #1f1f1f;
}

[data-bs-theme="dark"] .card {
    --bs-card-bg: #1f1f1f;
    --bs-card-border-color: #333;
}

.theme-toggle {
    position: relative;
    width: 60px;
    height: 30px;
    background: #ccc;
    border-radius: 15px;
    cursor: pointer;
    transition: background 0.3s;
}

.theme-toggle.dark {
    background: #4a90e2;
}

.theme-toggle::before {
    content: '';
    position: absolute;
    top: 3px;
    left: 3px;
    width: 24px;
    height: 24px;
    background: white;
    border-radius: 50%;
    transition: transform 0.3s;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.theme-toggle.dark::before {
    transform: translateX(30px);
}

.theme-icon {
    font-size: 1.2rem;
    margin: 0 5px;
}

.sun-icon { color: #ffc107; }
.moon-icon { color: #6c757d; }
[data-bs-theme="dark"] .sun-icon { color: #6c757d; }
[data-bs-theme="dark"] .moon-icon { color: #ffc107; }