* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: #f5f7fa;
    color: #16202a;
}
.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 1rem;
}
.topbar {
    background-color: #0d6efd;
    color: #fff;
    padding: 1rem 0;
}
.brand {
    margin: 0;
    font-size: 1.2rem;
}
.footer {
    background-color: #f1f3f5;
    border-top: 1px solid #e9ecef;
    text-align: center;
    padding: 0.75rem;
    margin-top: 2rem;
}
.form-container {
    background-color: #fff;
    border: 1px solid #dee2e6;
    border-radius: 0.375rem;
    margin-top: 2rem;
    padding: 1.5rem;
}
.form-group {
    margin-bottom: 1rem;
}
label {
    display: block;
    margin-bottom: 0.4rem;
}
input[type="text"],
input[type="password"] {
    width: 100%;
    padding: 0.6rem;
    border: 1px solid #adb5bd;
    border-radius: 0.25rem;
}
.btn {
    display: inline-block;
    padding: 0.6rem 1rem;
    border: none;
    background-color: #0d6efd;
    color: #fff;
    border-radius: 0.25rem;
    cursor: pointer;
    text-decoration: none;
}
.btn:hover {
    background-color: #0b5ed7;
}
.alert {
    padding: 0.9rem 1rem;
    margin-bottom: 1rem;
    border-radius: 0.25rem;
    font-size: 0.95rem;
}
.alert-success {
    color: #0f5132;
    background-color: #d1e7dd;
    border: 1px solid #badbcc;
}
.alert-error {
    color: #842029;
    background-color: #f8d7da;
    border: 1px solid #f5c2c7;
}