.auth-card {
    width: min(92%, 380px);
    margin: 60px auto;
    padding: 32px 28px;
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 12px 30px rgba(0, 0, 0, .12);
}

.auth-title {
    text-align: center;
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 24px;
}

.google-login-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    height: 44px;
    border-radius: 10px;
    border: 1px solid #ddd;
    text-decoration: none;
    font-weight: 600;
    color: #333;
}

.google-login-btn:hover {
    background: #f7f7f7;
}

.auth-divider {
    margin: 20px 0;
    text-align: center;
    font-size: 12px;
    color: #888;
    position: relative;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 40%;
    height: 1px;
    background: #e5e5e5;
}

.auth-divider::before {
    left: 0;
}

.auth-divider::after {
    right: 0;
}

.form-group {
    margin-bottom: 16px;
}

.form-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    margin-bottom: 20px;
}

.primary-btn {
    width: 100%;
    height: 44px;
    border-radius: 10px;
    border: none;
    background: #1a73e8;
    color: #fff;
    font-weight: 700;
}

.primary-btn:hover {
    background: #155ec4;
}

.auth-footer {
    margin-top: 20px;
    text-align: center;
    font-size: 13px;
}

.auth-footer a {
    color: #2563EB;
    /* 青色 */
    text-decoration: underline;
    /* 下線 */
    font-weight: 500;
    /* 少し太め */
}

.auth-footer a:hover {
    color: #1D4ED8;
    /* ホバー時に少し濃い青 */
}

.gsi-material-button {
    display: block;
    -moz-user-select: none;
    -webkit-user-select: none;
    -ms-user-select: none;
    -webkit-appearance: none;
    background-color: WHITE;
    background-image: none;
    border: 1px solid #747775;
    -webkit-border-radius: 20px;
    border-radius: 20px;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
    color: #1f1f1f;
    cursor: pointer;
    font-family: 'Roboto', arial, sans-serif;
    font-size: 14px;
    height: 40px;
    letter-spacing: 0.25px;
    outline: none;
    overflow: hidden;
    padding: 0 12px;
    position: relative;
    text-align: center;
    -webkit-transition: background-color .218s, border-color .218s, box-shadow .218s;
    transition: background-color .218s, border-color .218s, box-shadow .218s;
    vertical-align: middle;
    white-space: nowrap;
    width: auto;
    max-width: 400px;
    min-width: min-content;
    margin: auto;
}

.gsi-material-button .gsi-material-button-icon {
    height: 20px;
    margin-right: 10px;
    min-width: 20px;
    width: 20px;
}

.gsi-material-button .gsi-material-button-content-wrapper {
    -webkit-align-items: center;
    align-items: center;
    display: flex;
    -webkit-flex-direction: row;
    flex-direction: row;
    -webkit-flex-wrap: nowrap;
    flex-wrap: nowrap;
    height: 100%;
    justify-content: space-between;
    position: relative;
    width: 100%;
}

.gsi-material-button .gsi-material-button-contents {
    -webkit-flex-grow: 1;
    flex-grow: 1;
    font-family: 'Roboto', arial, sans-serif;
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    vertical-align: top;
}

.gsi-material-button .gsi-material-button-state {
    -webkit-transition: opacity .218s;
    transition: opacity .218s;
    bottom: 0;
    left: 0;
    opacity: 0;
    position: absolute;
    right: 0;
    top: 0;
}

.gsi-material-button:disabled {
    cursor: default;
    background-color: #ffffff61;
    border-color: #1f1f1f1f;
}

.gsi-material-button:disabled .gsi-material-button-contents {
    opacity: 38%;
}

.gsi-material-button:disabled .gsi-material-button-icon {
    opacity: 38%;
}

.gsi-material-button:not(:disabled):active .gsi-material-button-state,
.gsi-material-button:not(:disabled):focus .gsi-material-button-state {
    background-color: #303030;
    opacity: 12%;
}

.gsi-material-button:not(:disabled):hover {
    -webkit-box-shadow: 0 1px 2px 0 rgba(60, 64, 67, .30), 0 1px 3px 1px rgba(60, 64, 67, .15);
    box-shadow: 0 1px 2px 0 rgba(60, 64, 67, .30), 0 1px 3px 1px rgba(60, 64, 67, .15);
}

.gsi-material-button:not(:disabled):hover .gsi-material-button-state {
    background-color: #303030;
    opacity: 8%;
}

.login-input {
    width: 90%;
}