/* ... (您現有的 style.css 內容) ... */

/* 登入註冊頁面的主要佈局 */
.auth-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 120px); /* 扣除 header 和 footer 的高度，讓登入框垂直居中 */
    padding: 40px 20px; /* 上下內距和左右內距 */
    background-color: var(--light-gray);
}

.login-container {
    background-color: var(--white);
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 450px; /* 限制登入框的最大寬度 */
    text-align: center;
}

.login-container h2 {
    font-size: 32px;
    color: var(--dark-gray);
    margin-bottom: 30px;
}

.form-group {
    margin-bottom: 20px;
    text-align: left;
}

.form-group label {
    display: block;
    font-size: 15px;
    color: var(--text-color);
    margin-bottom: 8px;
    font-weight: 700;
}

.form-group input[type="email"],
.form-group input[type="password"] {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 16px;
    color: var(--text-color);
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-group input[type="email"]:focus,
.form-group input[type="password"]:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.25);
    outline: none;
}

.login-btn {
    width: 100%;
    padding: 15px;
    font-size: 18px;
    font-weight: 700;
    cursor: pointer;
    border: none;
    margin-top: 10px;
}

.auth-links {
    margin-top: 25px;
    font-size: 15px;
    color: var(--text-color);
}

.auth-links a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.auth-links a:hover {
    color: #0056b3;
    text-decoration: underline;
}

.auth-links span {
    margin: 0 5px;
}

.social-login {
    margin-top: 30px;
    border-top: 1px solid var(--border-color);
    padding-top: 25px;
}

.social-login p {
    color: var(--secondary-color);
    margin-bottom: 20px;
    font-size: 14px;
}

.social-buttons {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.social-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 12px 20px;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
    border: 1px solid var(--border-color);
    background-color: var(--white);
    color: var(--text-color);
    transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.social-btn img {
    margin-right: 10px;
    width: 20px;
    height: 20px;
}

.social-btn.google-btn:hover {
    background-color: #f0f0f0;
    border-color: #d1d1d1;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.08);
}

.social-btn.facebook-btn:hover {
    background-color: #f0f0f0;
    border-color: #d1d1d1;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.08);
}

/* RWD 響應式調整 */
@media (max-width: 768px) {
    .login-container {
        padding: 30px 25px;
    }

    .login-container h2 {
        font-size: 28px;
        margin-bottom: 25px;
    }

    .form-group label {
        font-size: 14px;
    }

    .form-group input {
        padding: 10px 12px;
        font-size: 15px;
    }

    .login-btn {
        padding: 12px;
        font-size: 16px;
    }

    .auth-links, .social-login p, .social-btn {
        font-size: 14px;
    }

    .social-btn img {
        width: 18px;
        height: 18px;
    }
}

@media (max-width: 480px) {
    .auth-page {
        padding: 20px 15px;
    }

    .login-container {
        padding: 25px 20px;
    }

    .login-container h2 {
        font-size: 24px;
        margin-bottom: 20px;
    }

    .social-buttons {
        gap: 10px;
    }
}