.wrapper {
    width: 900px;
    margin: 70px auto;
    padding: 0;
}
.wrapper h2 {
    margin-bottom: 10px;
    font-size: 28px;
    font-weight: bold;
    text-align: center;
}
.wrapper h5 {
    margin-bottom: 50px;
    text-align: center;
    color: #888;
    font-size: 14px;
    font-weight: normal;
}

.signup-section { margin-bottom: 50px; }
.signup-section h3 {
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 1px solid #ddd;
    font-size: 18px;
    font-weight: bold;
}
.signup-box { display: flex; justify-content: space-between; }

.input-box { width: 48%; margin-bottom: 22px; }
.input-box > label {
    display: block;
    margin-bottom: 8px;
    font-size: 15px;
    font-weight: bold;
}
.input-box > input {
    width: 100%;
    height: 46px;
    padding: 0 14px;
    border: 1px solid #ddd;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 14px;
}
.input-box > input::placeholder { color: #aaa; }
.input-box > input:focus { border-color: #888; outline: none; }
.input-box > input[readonly] { background-color: #f8f8f8; }
.input-box select {
    width: 100%;
    height: 46px;
    padding: 0 14px;
    border: 1px solid #ddd;
    border-radius: 6px;
    box-sizing: border-box;
    background-color: #fff;
    font-size: 14px;
}
.input-box select:invalid { color: #aaa; }
.input-box select:valid { color: #212529; }
.input-box select option { color: #212529; }
.input-box select:focus { border-color: #888; outline: none; }
.input-box input[type="date"]:invalid { color: #aaa; }
.input-box input[type="date"]:valid { color: #212529; }

.gender-box {
    height: 46px;
    display: flex;
    align-items: center;
}
.radio-style { margin-right: 10px; }
.radio-style input { display: none; }
.gender-box .radio-style { margin-bottom: 0; font-weight: normal; }
.radio-style span {
    width: 100px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid #ddd;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 14px;
    font-weight: normal;
    cursor: pointer;
}
.radio-style input:checked + span {
    border: 2px solid #18181b;
    color: #18181b;
    font-weight: bold;
}

.address-box { display: flex; justify-content: space-between; }
.address-box input {
    width: 72%;
    height: 46px;
    padding: 0 14px;
    border: 1px solid #ddd;
    border-radius: 6px;
    box-sizing: border-box;
    background-color: #f8f8f8;
    font-size: 14px;
}
.address-box input::placeholder { color: #aaa; }
.address-box input:focus { border-color: #888; outline: none; }
.address-box .btnAddress {
    width: 25%;
    height: 46px;
    border: none;
    border-radius: 6px;
    background-color: #18181b;
    color: #fff;
    font-size: 14px;
    cursor: pointer;
}
.address-box .btnAddress:hover { background-color: #000; }

.join-btn {
    display: flex;
    justify-content: space-between;
    margin-top: 50px;
}
.join-btn button {
    width: 48%;
    height: 46px;
    border: none;
    border-radius: 6px;
    background-color: #18181b;
    color: #fff;
    font-size: 15px;
    cursor: pointer;
}
.join-btn button:hover { background-color: #000; }
.join-btn a {
    width: 48%;
    height: 46px;
    border: none;
    border-radius: 6px;
    box-sizing: border-box;
    background-color: #e9ecef;
    color: #555;
    font-size: 15px;
    line-height: 46px;
    text-align: center;
    text-decoration: none;
}
.join-btn a:hover { background-color: #dee2e6; color: #333; }
.text-danger { margin-top: 6px; font-size: 13px; }