* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

html {
    font-family: Arial, Helvetica, sans-serif;
}

.header {
    display: flex;
    justify-content: space-between;
    background-color: #3a88dd;
    height: 50px;
}

.header .title-header {
    padding-left: 30px;
    line-height: 50px;
    font-size: 20px;
    color: white;
}

.icon {
    padding-right: 30px;
    line-height: 50px;
    color: white;
}

.container {
    margin-top: 20px;
}

.monhoc-container {
    display: flex;
    flex-direction: column;
    justify-content: space-around;
}



.monhoc-container>.monhoc {
    display: flex;
    justify-content: space-around;
    margin: 70px;

}

.monhoc-content {
    border: 2px solid;
    border-radius: 5px;
    width: 339px;
    height: 300px;

}


.file-icon {
    font-size: 40px;
    text-align: center;
    margin-top: 15px;

}

.title {
    text-align: center;
    font-size: 20px;
    margin-top: 27px;
    margin-bottom: 15px;

}

.view-button {
    display: flex;
    justify-content: center;
    align-items: center;

}

.view-button>a {
    text-align: center;
    font-size: 20px;

}

.view-button>a>button {
    border-radius: 5px;
    padding: 5px 17px;

}


.btn-back {
    float: right;

}

.btn-back>a {
    border: 2px solid blue;
    background-color: #1982ff;
    text-decoration: none;
    color: black;
    padding: 10px 70px;
    border-radius: 5px;
}

.btn-back:hover {
    opacity: 0.8;
}

.title>.title-1 {
    font-weight: bold;

}

.title>.title-2 {
    background-color: #535353;
    color: white;
}

.monhoc-content-sub {
    text-align: center;
    margin-bottom: 20px;
}

.button-1 {
    margin-right: 5px;
    color: white;
    border-color: #1982ff;
    background-color: #378bef;
}

.button-1:hover {
    opacity: 0.7;
    cursor: pointer;
}

.button-2 {
    background-color: white;
    color: #9fa8ac;
    border-color: #9fa8ac;
    font-weight: bold;
}

.button-2:hover {
    opacity: 0.7;
    cursor: pointer;
}




.custom-button {
    background-color: #1a1a2e;
    color: white;
    border: none;
    width: 100%;
    padding: 15px;
    font-size: 16px;
}

.custom-button:hover {
    background-color: #16213e;
    opacity: 0.9;
}

.form-control,
.form-select {
    border-radius: 0;
    /* Xóa bỏ border-radius */
}

.content-container {
    flex: 1;
    padding-bottom: 60px; /* Space for footer */
}

/* Sticky footer styling */
.footer {
    position: sticky;
    bottom: 0;
    width: 100%;
    background-color: #f8f9fa; /* Light gray background */
    padding: 10px 0;
    border-top: 1px solid #dee2e6;
   
}