#wrapper {
    font-size: 20px;
    font-family: "Montserrat", sans-serif;
    color: #000;
}

#form-register {
    background: url("../img/header-content-bg.png") no-repeat;
    background-size: 100% 100%;
    background-position: left top;
}

#form-register .form-group {
    background: linear-gradient(to bottom, white 0%, #cccccc 100%);
    color: #4EB753;
}

#form-register .form-group label {
    display: block;
}

#form-register .form-group input {
    border: none;
    display: block;
}

#form-register .form-group input:active,
#form-register .form-group input:focus,
#form-register .form-group input:focus-visible {
    border: none;
    outline: none;
    box-shadow: none;
}

#form-register .form-group-btn {
    color: #fff;
    text-align: center;
}

.button-register {
    background: linear-gradient(to bottom, #2e7d32, #1b5e20);
    /* xanh lá gradient */
    color: #ffeb3b;
    /* vàng tươi */
    font-weight: bold;
    font-style: italic;
    padding: 10px 24px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    text-transform: uppercase;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    transition: opacity 0.3s ease;
}

.button-register:hover {
    opacity: 0.9;
}

.triangle {
    width: 0;
    height: 0;
    border-top: 20px solid transparent;
    border-bottom: 20px solid transparent;
    border-left: 35px solid green;
}

.error-summary {
    background-color: #fdecea;
    /* nền đỏ nhạt */
    border: 1px solid #f5c2c7;
    /* viền đỏ nhẹ */
    color: #b71c1c;
    /* màu chữ đỏ đậm */
    padding: 16px;
    border-radius: 8px;
    margin-bottom: 20px;
}

.error-summary ul {
    margin: 0;
    padding-left: 20px;
}

.error-summary li {
    list-style-type: disc;
}