body {
    font-family: Arial, "Noto Sans KR", sans-serif;
    background: #f3f4f6;
    margin: 0;
    padding: 20px;
}
.box {
    max-width: 420px;
    margin: 40px auto;
    background: #fff;
    padding: 24px;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0,0,0,.08);
}
.wide {
    max-width: 760px;
}
h2 {
    text-align: center;
}
label {
    display: block;
    margin-top: 14px;
    font-weight: bold;
}
input {
    width: 100%;
    box-sizing: border-box;
    padding: 13px;
    margin-top: 6px;
    border: 1px solid #ccc;
    border-radius: 10px;
    font-size: 16px;
}
button {
    width: 100%;
    margin-top: 20px;
    padding: 14px;
    border: 0;
    border-radius: 10px;
    background: #111827;
    color: white;
    font-size: 17px;
}
.error {
    background: #fee2e2;
    color: #991b1b;
    padding: 16px;
    border-radius: 10px;
    line-height: 1.6;
}
.link, p {
    text-align: center;
}
.tabs {
    text-align: center;
    margin: 15px 0;
}
.tabs a {
    display: inline-block;
    margin: 4px;
    padding: 8px 14px;
    background: #e5e7eb;
    border-radius: 8px;
    text-decoration: none;
    color: #111827;
}
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 16px;
}
th, td {
    border-bottom: 1px solid #ddd;
    padding: 10px;
    text-align: center;
}