* { box-sizing: border-box; }
body {
    font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
    background: #f6f7f9;
    color: #222;
    margin: 0;
    padding: 0;
}
.container {
    max-width: 480px;
    margin: 48px auto;
    background: #fff;
    padding: 32px;
    border-radius: 8px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.08);
}
h1 {
    font-size: 1.3rem;
    margin-top: 0;
}
form {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 20px;
}
label {
    font-size: 0.9rem;
}
input[type="email"] {
    padding: 10px;
    font-size: 1rem;
    border: 1px solid #ccc;
    border-radius: 4px;
}
.checkbox {
    display: flex;
    align-items: center;
    gap: 8px;
}
.checkbox input { width: auto; }
button {
    padding: 10px;
    font-size: 1rem;
    background: #2c6bed;
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}
button:hover { background: #1f52c0; }
.message {
    padding: 10px 12px;
    border-radius: 4px;
    font-size: 0.9rem;
}
.message.success { background: #e6f4ea; color: #1e7e34; }
.message.error { background: #fdecea; color: #c0392b; }