.sp-line-login-container {
    margin: 15px 0 20px 0;
    text-align: left;
}

/* ボタン全体 */
.sp-btn-line {
    display: inline-flex;
    align-items: center;
    background-color: #06C755;
    color: #ffffff !important;
    border-radius: 4px;
    text-decoration: none;
    box-shadow: 0 4px 6px rgba(0,0,0,0.15);
    transition: background-color 0.3s;
    overflow: hidden;
    height: 50px;
    width: 100%;
    max-width: 320px;
    padding: 0;
}

.sp-btn-line:hover {
    filter: brightness(0.9);
    color: #ffffff !important;
    text-decoration: none !important;
}

/* 左側の画像エリア */
.sp-btn-line-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 100%;
    border-right: 1px solid rgba(0, 0, 0, 0.08);
}

/* 読み込んだ画像を枠にピッタリはめる */
.sp-btn-line-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* 右側のテキストエリア */
.sp-btn-line-text {
    flex-grow: 1;
    text-align: center;
    font-weight: bold;
    font-size: 16px;
    padding-right: 12px;
}

/* 下部のテキストリンク */
.sp-normal-reg-text {
    display: block;
    margin-top: 10px;
    font-size: 14px;
}

.sp-normal-reg-text a {
    color: #333333;
    text-decoration: underline;
}

.sp-normal-reg-text a:hover {
    text-decoration: none;
}

/* スマホ用 */
@media screen and (max-width: 768px) {
    .sp-btn-line {
        height: 48px;
        max-width: 100%;
    }
    .sp-btn-line-icon {
        width: 48px;
    }
    .sp-btn-line-text {
        font-size: 15px;
    }
}