.sem-unit-header, .sem-header {
    margin: 30px auto;
    padding: 10px 20px;
    font-size: 35px;
    font-weight: bold;
    color: rgb(0, 0, 0);
    text-align: center;
}

.sem-number {
    color: #0044cc;
}

/* BASIC UNIT  */

.container {
    max-width: 900px;
    margin: 20px auto;
    padding: 25px;
    background-color: #fff;
    border: 1px solid #ccc;
    border-radius: 12px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.unit {
    font-size: 1.4rem;
    font-weight: bold;
    color: #0044cc;
    text-decoration: none;
    display: block;
    margin-bottom: 5px;
    cursor: pointer;
}

.unit:hover {
    text-decoration: underline;
}

.content {
    padding-left: 15px;
    line-height: 1.6;
    color: #333;
    font-size: 1.2rem;
}

ul {
    text-align: left;
}

/* TABLE STYLES */

table {
    width: 90%;
    margin: 20px auto;
    border-collapse: collapse;
    font-family: 'Arial', sans-serif;
    font-size: 16px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    overflow-x: auto;
    display: block;
}

thead {
    background-color: #4CAF50;
    color: white;
}

th, td {
    border: 1px solid #ddd;
    padding: 12px 15px;
    text-align: center;
    word-wrap: break-word;
}

tbody tr:nth-child(even) {
    background-color: #f9f9f9;
}

tbody tr:hover {
    background-color: #e0f7fa;
    transition: background-color 0.3s;
}

caption {
    font-size: 20px;
    font-weight: bold;
    margin-bottom: 10px;
    color: #333;
}

/* === MEDIA QUERIES === */

@media (max-width: 768px) {
    .sem-unit-header, .sem-header {
        font-size: 28px;
        padding: 8px 10px;
        margin: 20px auto;
    }

    .container {
        padding: 15px;
        margin: 15px;
    }

    .unit {
        font-size: 1.2rem;
    }

    .content {
        font-size: 1rem;
    }

    table {
        font-size: 14px;
    }

    th, td {
        padding: 10px 8px;
    }
}

@media (max-width: 480px) {
    .sem-unit-header, .sem-header {
        font-size: 24px;
    }

    .container {
        padding: 10px;
        margin: 10px;
    }

    .unit {
        font-size: 1rem;
    }

    .content {
        font-size: 0.95rem;
    }

    table {
        font-size: 13px;
    }

    caption {
        font-size: 18px;
    }
}