.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-color: rgba(0, 0, 0, 0.8);
}

.modal-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60%;
    height: 70%;
    padding: 0;
}

#video {
    width: 100%;
    height: 100%;
}

.close {
    color: red;
    font-size: 50px;
    font-weight: bold;
    background: none;
    border: none;
    outline: none;
    position: absolute;
    top: 10px;
    right: 10px;
    cursor: pointer;
    z-index: 1000;
}

.close:hover,
.close:focus {
    color: darkred;
}

.apply-btn {
    background-color: #4CAF50;
    border: none;
    color: white;
    padding: 10px 20px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 14px;
    margin: 5px 10px;
    cursor: pointer;
    border-radius: 4px;
}

.apply-btn:hover {
    background-color: #45a049;
}

.expired-btn {
    background-color: red;
    border: none;
    color: white;
    padding: 10px 20px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 14px;
    margin: 5px 10px;
    cursor: not-allowed;
    border-radius: 4px;
}

.container {
    max-width: 1350px;
    margin: 0 auto;
    padding: 20px;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

table,
th,
td {
    border: 1px solid #ddd;
    text-align: left;
}

th,
td {
    color: #212571 !important;
    padding: 12px;
}

th {
    background-color: #f2f2f2;
}

@media screen and (max-width: 768px) {
    .container {
        width: 95%;
        padding: 10px;
    }

    .modal-content {
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        width: 75%;
        height: 50%;
        padding: 0;
    }

    table,
    th,
    td {
        font-size: 14px;
    }
}

@media screen and (max-width: 400px) {
    .container {
        width: 95%;
        padding: 8px;
    }

    table,
    th,
    td {
        font-size: 12px;
    }
}

.letter {
    padding-top: 10px;
}

 /* Container for the page */
 .container123 {
    width: 90%;
    margin: 0 auto;
    padding: 20px;
    max-width: 1200px;
}

#course-note {
    background-color: #f4f4f4;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

pre {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 16px;
    white-space: pre-wrap;
    word-wrap: break-word;
    text-align: justify;
    margin: 0;
}

p strong {
    font-size: 1.2rem;
    font-weight: bold;
    color: #333;
}


@media (max-width: 768px) {
    .container123 {
        width: 95%;
        padding: 15px;
    }

    pre {
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    .container123 {
        width: 100%;
        padding: 10px;
    }

    pre {
        font-size: 12px;
    }
}