/* Base & Dark Mode Styles */
body {
    background-color: #f8f9fa;
    transition: background-color 0.3s, color 0.3s;
}

.dark-mode {
    background-color: #121212;
    color: #ffffff;
}
.dark-mode .card {
    background-color: #1f1f1f;
    color: #ffffff;
}
.dark-mode .form-control {
    background-color: #2b2b2b;
    color: #ffffff;
    border: 1px solid #555;
}
.dark-mode .btn-primary {
    background-color: #007bff;
    color: #ffffff;
}

.container {
    margin-top: 100px;
    max-width: 400px;
}
.card {
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: background-color 0.3s, color 0.3s;
}
.btn-primary {
    background-color: #007bff;
    border: none;
}

#themeToggle {
    position: fixed;
    right: 20px;
    top: 20px;
    background: none;
    border: none;
    color: #343a40;
    font-size: 1.4rem;
    cursor: pointer;
    z-index: 9999;
}