/* General page styles */
body {
    background-color: #f8f9fa; /* light grey background */
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
}

/* Navbar */
.navbar-brand {
    font-size: 1.3rem;
}

.navbar-nav .nav-link {
    font-weight: 500;
    transition: background-color 0.2s ease;
}

.navbar-nav .nav-link:hover {
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 6px;
}

/* Cards */
.card {
    border-radius: 12px;
    box-shadow: 0 3px 6px rgba(0,0,0,0.08);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    overflow: visible !important; /* ensure dropdowns, popovers inside card show properly */
}

.card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.12);
}

/* Buttons */
.btn {
    border-radius: 8px;
    font-weight: 500;
}

/* Form elements */
input.form-control, 
textarea.form-control, 
select.form-control {
    border-radius: 8px;
    border: 1px solid #ced4da;
    box-shadow: none !important;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

input.form-control:focus, 
textarea.form-control:focus, 
select.form-control:focus {
    border-color: #0d6efd;
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
}

/* Lesson plan submissions table */
.table-lesson {
    background: #fff;
    border-radius: 10px;
    overflow: hidden;
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

.table-lesson th {
    background-color: #0d6efd;
    color: #fff;
    font-weight: 600;
    text-align: center;
    padding: 10px;
}

.table-lesson td {
    vertical-align: middle;
    padding: 10px;
}

/* Comments */
.comments .card {
    background: #fdfdfd;
    border-left: 4px solid #0d6efd;
    margin-bottom: 10px;
}

/* Footer */
footer {
    margin-top: 40px;
    padding: 20px;
    text-align: center;
    background-color: #f1f1f1;
    border-top: 1px solid #ddd;
}