*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    background: #f5f3ef;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    font-family: "Yu Gothic", "游ゴシック", YuGothic, sans-serif;
    color: #333;
}

.login-box {
    width: 100%;
    max-width: 420px;
    background: #fff;
    padding: 34px 28px;
    border-radius: 18px;
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.08);
}

h1 {
    margin: 0 0 26px;
    color: #5a4635;
    font-size: 24px;
    text-align: center;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
    color: #5a4635;
    font-size: 14px;
}

input {
    width: 100%;
    padding: 13px 14px;
    border: 1px solid #ddd1c7;
    border-radius: 10px;
    font-size: 15px;
    margin-bottom: 18px;
}

button {
    width: 100%;
    border: none;
    background: #8a6a4f;
    color: #fff;
    padding: 15px;
    border-radius: 999px;
    font-size: 15px;
    cursor: pointer;
}

button:hover {
    opacity: 0.85;
}

.error {
    background: #fff1f1;
    color: #9b3b3b;
    padding: 12px 14px;
    border-radius: 10px;
    margin-bottom: 18px;
    font-size: 14px;
}

.notice {
    background: #eef4ff;
    color: #36506d;
    padding: 12px 14px;
    border-radius: 10px;
    margin-bottom: 18px;
    font-size: 14px;
}