body {
    margin: 0;
    padding: 0;
    font-family: "Yu Gothic", "Hiragino Sans", "Meiryo", sans-serif;
    background: #f4f7fb;
    color: #333;
    line-height: 1.7;
}

header {
    background: #003366;
    color: #fff;
    text-align: center;
    padding: 28px 10px;
}

header h1 {
    margin: 0;
    font-size: 1.8rem;
}

header p {
    margin: 8px 0 0;
}

.container {
    max-width: 920px;
    margin: 0 auto;
    background: #fff;
    padding: 28px;
}

h2 {
    color: #003366;
    border-left: 7px solid #003366;
    padding-left: 10px;
    margin-top: 30px;
}

.notice {
    background: #eaf4ff;
    border: 1px solid #b7d7f5;
    border-radius: 8px;
    padding: 16px 20px;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 12px;
}

th,
td {
    border: 1px solid #ccc;
    padding: 10px;
}

th {
    background: #003366;
    color: #fff;
}

.center {
    text-align: center;
}

.button,
button {
    display: inline-block;
    background: #0066cc;
    color: #fff;
    text-decoration: none;
    border: none;
    border-radius: 6px;
    padding: 12px 28px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
}

.button:hover,
button:hover {
    background: #004c99;
}

form {
    max-width: 680px;
    margin: 0 auto;
}

label {
    display: block;
    font-weight: bold;
    margin-top: 16px;
}

input,
select {
    width: 100%;
    box-sizing: border-box;
    padding: 10px;
    font-size: 1rem;
    margin-top: 4px;
}

input[type="file"] {
    background: #fff;
    border: 1px solid #ccc;
}

button {
    width: 100%;
    margin-top: 28px;
}

.required {
    color: #c00;
    font-size: 0.85rem;
}

.message {
    padding: 14px;
    border-radius: 6px;
    margin-bottom: 20px;
    font-weight: bold;
}

.success {
    background: #e7ffe7;
    border: 1px solid #3ca63c;
    color: #075c07;
}

.error {
    background: #ffecec;
    border: 1px solid #cc3333;
    color: #8a0000;
}

footer {
    background: #003366;
    color: #fff;
    text-align: center;
    padding: 18px;
}