/* Google OAuth認証ボタンのスタイル */

.google-auth-section {
    margin-bottom: 2rem;
}

.google-login-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 100%;
    padding: 14px 24px;
    background: #ffffff;
    border: 2px solid #dadce0;
    border-radius: 8px;
    color: #3c4043;
    font-family: 'Google Sans', Roboto, Arial, sans-serif;
    font-size: 16px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s ease-in-out;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
}

.google-login-btn:hover {
    background: #f8f9fa;
    border-color: #c1c7cd;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    color: #3c4043;
    text-decoration: none;
    transform: translateY(-1px);
}

.google-login-btn:active {
    background: #f1f3f4;
    border-color: #c1c7cd;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
    transform: translateY(0);
}

.google-login-btn:focus {
    outline: none;
    box-shadow: 0 0 0 4px rgba(66, 133, 244, 0.3);
}

.google-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.google-login-text {
    font-weight: 500;
    letter-spacing: 0.25px;
}

/* 区切り線のスタイル */
.auth-divider {
    display: flex;
    align-items: center;
    margin: 1.5rem 0;
    color: #6c757d;
    font-size: 14px;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: #dee2e6;
}

.auth-divider::before {
    margin-right: 1rem;
}

.auth-divider::after {
    margin-left: 1rem;
}

/* ダークモード対応 */
@media (prefers-color-scheme: dark) {
    .google-login-btn {
        background: #202124;
        border-color: #5f6368;
        color: #e8eaed;
    }
    
    .google-login-btn:hover {
        background: #303134;
        border-color: #6c7075;
        color: #e8eaed;
    }
    
    .google-login-btn:active {
        background: #28292c;
    }
    
    .auth-divider::before,
    .auth-divider::after {
        background: #5f6368;
    }
}

/* レスポンシブ対応 */
@media (max-width: 576px) {
    .google-login-btn {
        padding: 12px 20px;
        font-size: 15px;
    }
    
    .google-icon {
        width: 18px;
        height: 18px;
    }
}