/* ================================================
   pre-login.css — ログイン前ページ専用スタイル
   対象: top.html, login.html, signup.html,
         guide_pre_login.html, home/* 等
   ================================================ */

/* top.html — トップ（ランディング）ページ */
body {
    background-color: #ffffff;
    padding: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.top-container {
    max-width: 800px;
    margin: auto;
    width: 100%;
    padding: 20px;
    box-sizing: border-box;
    text-align: center;
}

.main-logo {
    margin-bottom: 40px;
}

.main-logo h1 {
    font-size: 28px;
    font-weight: 700;
    color: #333;
}

.auth-top-buttons {
    flex-direction: column;
    align-items: center;
    background-color: transparent;
}

.auth-btn {
    width: 100%;
    margin-bottom: 15px;
    padding: 16px;
    font-size: 16px;
}

/* guide_pre_login.html — ご利用案内（ログイン前） */
.back-link {
    display: block;
    text-align: center;
    margin-top: 24px;
    margin-bottom: 8px;
    color: #666;
    font-size: 14px;
    text-decoration: underline;
}