body {
    background-color: rgb(33, 53, 85);
    font-family: Arial, sans-serif;
}

/* Sidebar */
.sidebar {
    width: 200px;
    min-height: 100vh;
    background-color: rgb(11, 29, 58);
    position: fixed;
    top: 0;
    left: 0;
    border-top-right-radius: 20px;
    border-bottom-right-radius: 20px;
}

.sidebar .nav {
    margin-top: 100px;
    padding-left: 20px;
}


.sidebar .nav-link {
    color: #ffffff;
    padding: 12px 20px;
    display: block;
}

.sidebar .nav-link.active,
.sidebar .nav-link:hover {
    background-color: #1b2836;
    color: #fff;
    border-radius: 4px;
}

/* Main content shifts right */
.content {
    margin-left: 200px;
}

.student-card {
    background-color: #d9e4f4;
    border-radius: 15px;
    padding: 20px;
    margin: 20px auto;
    max-width: 700px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.student-header {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.student-header img {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    margin-right: 15px;
    border: 2px solid #1c3b63;
    background: #fff;
}

.student-info p {
    margin: 2px 0;
    font-size: 14px;
    color: #222;
}

.dropdown-section {
    background-color: #2e518c;
    color: #fff;
    padding: 10px;
    margin-bottom: 10px;
    border-radius: 5px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.dropdown-content {
    background-color: #d9e4f4;
    padding: 10px;
    border-radius: 8px;
    margin-bottom: 15px;
}

.table-custom {
    background-color: #d9e4f4;
    border-radius: 12px;
    overflow: hidden;
}

.table-custom th,
.table-custom td {
    text-align: center;
    vertical-align: middle;
}

@media (max-width: 768px) {
    .sidebar {
        width: 150px;
    }

    .content {
        margin-left: 150px;
    }

    .student-header {
        flex-direction: column;
        text-align: center;
    }

    .student-header img {
        margin-bottom: 10px;
    }
}

/* responsive */
@media (max-width: 576px) {
    .sidebar {
        width: 130px;
        padding-top: 20px;
    }

    .content {
        margin-left: 130px;
        padding: 10px;
    }
}

/* extra small devices: under 550px */
@media (max-width: 550px) {
    body {
        overflow-x: hidden;
    }

    .sidebar {
        width: 96px;
        border-top-right-radius: 14px;
        border-bottom-right-radius: 14px;
    }

    .sidebar .nav {
        margin-top: 60px;
        padding-left: 10px;
    }

    .sidebar .nav-link {
        padding: 10px 12px;
        font-size: 12px;
    }

    .content {
        margin-left: 96px;
        padding: 12px;
    }

    .student-card {
        max-width: 100%;
        margin: 12px auto;
        padding: 14px;
        border-radius: 12px;
    }

    .student-header {
        flex-direction: column;
        text-align: center;
        gap: 10px;
    }

    .student-header img {
        width: 64px;
        height: 64px;
        margin-right: 0;
        margin-bottom: 6px;
    }

    .student-info h5 {
        font-size: 16px;
    }

    .student-info p {
        font-size: 13px;
        word-break: break-word;
        overflow-wrap: anywhere;
    }

    .dropdown-section {
        padding: 10px 12px;
        font-size: 14px;
    }

    .dropdown-content {
        padding: 8px;
    }

    .table-responsive {
        overflow-x: auto;
    }

    .table-custom th,
    .table-custom td {
        padding: 8px;
        font-size: 13px;
        white-space: normal;
        word-break: break-word;
        overflow-wrap: anywhere;
    }
}