body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

main {
    flex: 1 0 auto;
}

.hero {
    background: linear-gradient(135deg, #0d6efd 0%, #0a58ca 100%);
    color: #fff;
}

.course-card .card-img-top {
    height: 160px;
    object-fit: cover;
    background-color: #e9ecef;
}

.chapter-locked {
    opacity: 0.65;
}

/* Fallback styling for Django's built-in auth forms (password reset), which
   don't carry Bootstrap's form-control class on their widgets. */
form input[type="text"],
form input[type="email"],
form input[type="password"] {
    display: block;
    width: 100%;
    padding: 0.375rem 0.75rem;
    border: 1px solid #ced4da;
    border-radius: 0.375rem;
}