* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: sans-serif;
    background: #f0f0f0;
}

/* ログインオーバーレイ */
#auth-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

#login-box {
    background: #fff;
    padding: 2rem;
    border-radius: 8px;
    width: 320px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

#login-box h2 {
    margin-bottom: 1.2rem;
    font-size: 1.4rem;
    text-align: center;
}

#login-error {
    background: #fee;
    color: #c00;
    border: 1px solid #fcc;
    border-radius: 4px;
    padding: 0.5rem 0.75rem;
    margin-bottom: 1rem;
    font-size: 0.875rem;
}

#login-form label {
    display: block;
    margin-bottom: 0.25rem;
    font-size: 0.875rem;
    color: #555;
}

#login-form input {
    display: block;
    width: 100%;
    padding: 0.5rem 0.75rem;
    margin-bottom: 1rem;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 1rem;
}

#login-form input:focus {
    outline: none;
    border-color: #668;
    box-shadow: 0 0 0 2px rgba(100, 100, 150, 0.2);
}

#login-form button {
    width: 100%;
    padding: 0.6rem;
    background: #445;
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
}

#login-form button:hover {
    background: #334;
}

/* メインコンテンツ */
#main-content {
    padding: 2rem;
}