:root {
    --white: #FFF;
    --black: #000;
    --grey-10: #F8F9FA;
    --grey-20: #F0F3F5;
    --grey-40: #DADEE5;
    --grey-50: #C5CBD4;
    --grey-60: #A0A9B5;
    --grey-70: #6D7480;
    --grey-80: #2C2D40;
    --primary-blue-50: #1764E9;
    --secondary-red-20: #FEEFF0;
    --secondary-red-50: #DC1B3E;
    --secondary-red-70: #A91212;
    --trial-button-50: #FFAC14;
    --trial-button-20: #FFD383;
    --details-link-hover: #009BE3;
    --details-link-click: #9D9D9D;
    --banner-background: #00AEF6;
    --banner-bottom-background: #E4F2F7;

    /* 12px */
    --font-regular-20: 0.75rem;
    /* 14px */
    --font-regular-30: 0.875rem;
    /* 16px */
    --font-regular-40: 1rem;
}

html {
    font-family: Inter, "Noto Sans JP", sans-serif;
    font-weight: 400;
    line-height: 1.45;
    color: var(--grey-80);
    height: 100%;
}

body {
    background-color: var(--white);
    height: 100%;
}

#top {
    height: 100%;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style-type: none;
}

img {
    width: 100%;
    height: auto;
    vertical-align: middle;
}

input,
select,
textarea {
    border-style: solid;
}

.container {
    width: 100%;
    max-width: 424px;
    margin: 24px auto 0;
    padding: 0 12px;
}

.main {
    margin-bottom: 24px;
}

.content {
    background-color: var(--white);
}

.logo {
    margin-bottom: 12px;
    text-align: center;
}

.logo__img {
    width: 107px;
}

.form-area {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.form-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-item__label {
    font-size: var(--font-regular-20);
}

.form-item__input {
    width: 100%;
    padding: 7px 8px;
    border: 1px solid var(--grey-50);
    border-radius: 4px 0 0 4px;
    font-size: var(--font-regular-30);
}

.form-item__input::placeholder {
    color: var(--grey-60);
}

.--disabled .form-item__input {
    background-color: var(--grey-20);
    border-color: var(--grey-20);
}

.--resettable .form-item__input {
    padding-right: 30px;
}

.--error .form-item__input {
    border-color: var(--secondary-red-50);
    background-color: var(--secondary-red-20);
}

.form-item__select {
    width: 100%;
    padding: 7px 24px 7px 8px;
    border: 1px solid var(--grey-50);
    border-radius: 4px;
    font-size: var(--font-regular-30);
}

.form-item__input-wrapper {
    display: flex;
}

.form-item__input-wrapper,
.form-item__select-wrapper {
    position: relative;
}

.form-item__input-wrapper label {
    font-size: smaller;
    padding-left: 8px;
    color: var(--grey-70);
}

.form-item__input:not([disabled]):hover,
.form-item__select:not([disabled]):hover {
    border-color: var(--grey-60);
}

.form-item__input:focus,
.form-item__select:focus {
    border-color: var(--primary-blue-50);
}

.form-item__select-arrow {
    position: absolute;
    top: 50%;
    right: 8px;
    transform: translateY(-50%);
    width: 8px;
    height: 8px;
}

.form-item__reset {
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0px 4px 4px 0;
    background-color: var(--grey-20);
    border-left: 1px solid var(--grey-40);
}

.form-item__reset:hover {
    cursor: pointer;
}

.form-item__reset:hover,
.form-item__reset:focus {
    background-color: var(--grey-40);
}

.form-item__reset img {
    width: auto;
}

.form-item__error-message {
    color: var(--secondary-red-70);
    font-size: var(--font-regular-30);
}

.form_item__heading {
    font-size: var(--font-regular-40);
    font-weight: 700;
}

.form_item__description {
    font-size: var(--font-regular-30);
    color: var(--grey-70);
    line-height: 1.5;
}

.form_item__description-wrapper {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-item__caption {
    font-size: var(--font-regular-30);
    color: var(--grey-60);
}

.submit-btn {
    position: relative;
    overflow: hidden;
    display: block;
    padding: 9px 16px 7px;
    width: 100%;
    border-radius: 4px;
    color: var(--white);
    font-size: var(--font-regular-30);
}

.submit-btn__inner {
    position: relative;
    z-index: 1;
}

.submit-btn::after {
    content: "";
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 4px;
    background-color: var(--primary-blue-50);
}

.submit-btn:hover::after,
.submit-btn:focus::after {
    filter: brightness(92%);
}

.submit-btn:active::after {
    filter: brightness(84%);
}

.sso-area {
    margin-top: 12px;
}

.sso-scroll {
    max-height: 20em;
    overflow-y: auto;
}

.sso-area__divider {
    display: flex;
    align-items: center;
    gap: 16px;
}

.sso-tenant-item {
    margin-top: 14px;
    margin-bottom: 14px;
}

.sso-tenant-item__label {
    margin-bottom: 12px;
    display: block;
    font-weight: 700;
}

.sso-area__divider::before,
.sso-area__divider::after {
    content: "";
    display: block;
    height: 1px;
    flex: 1 1 auto;
    background-color: var(--grey-40);
}

.sso-area__divider-text {
    color: var(--grey-70);
    font-size: var(--font-regular-30);
}

.sso-login-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.sso-login-list__link {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 16px;
    border: 1px solid var(--grey-50);
    border-radius: 4px;
    color: inherit;
    text-align: center;
    font-size: var(--font-regular-30);
}

.sso-login-list__link:hover,
.sso-login-list__link:focus {
    background-color: var(--grey-10);
    border-color: var(--grey-60);
}

.sso-login-list__img {
    width: 18px;
    height: 18px;
}

.sso-login-list__inner {
    flex: 1 1 auto;
}

.error-message {
    margin-bottom: 8px;
    padding: 8px;
    border: 1px solid var(--secondary-red-50);
    border-radius: 4px;
    background-color: var(--secondary-red-20);
}

.error-message__text {
    color: var(--secondary-red-70);
    font-size: var(--font-regular-30);
}

.footer-link-list {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 8px;
}

.footer-link-list__link {
    color: var(--grey-70);
    font-size: var(--font-regular-20);
}

.footer-link-list__link:hover,
.footer-link-list__link:focus {
    text-decoration: underline;
}

.sp-hidden {
    display: none;
}

.banner {
    display: none;
}

.banner__joint {
    display: none;
}

@media (min-width: 424px) {
    #top {
        display: flex;
        justify-content: center;
    }

    body {
        background-color: var(--grey-20);
    }

    .container {
        margin-top: 100px;
    }

    .main {
        margin-bottom: 32px;
    }

    .content {
        padding: 32px;
        border: 1px solid var(--grey-40);
        border-radius: 4px;
        background-color: var(--white);
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    }

    .logo {
        margin-bottom: 24px;
    }

    .logo__img {
        width: 182px;
    }

    .sso-area {
        margin-top: 24px;
    }

    .sso-scroll {
        max-height: 16em;
        overflow-y: auto;
    }

    .sso-tenant-item {
        margin-top: 28px;
        margin-bottom: 28px
    }

    .sso-login-list {
        gap: 24px;
    }

    .sso-login-list__link {
        padding-top: 11px;
        padding-bottom: 11px;
    }

    .form-area {
        gap: 24px;
    }

    .footer-link-list {
        gap: 16px;
    }

    .sp-hidden {
        display: initial;
    }
}

@media (min-width: 1024px) {
    #top {
        display: flex;
        justify-content: center;
    }

    .banner {
        display: block;
        font-family: "Noto Sans JP";
        font-size: var(--font-regular-30);
        font-weight: 700;
        background-color: var(--banner-bottom-background);
    }

    .banner__img {
        display: flex;
        justify-content: center;
        align-items: center;
        background-color: var(--banner-background);
    }

    .banner__img img {
        max-width: 38vw;
        min-width: 35vw;
    }

    .banner__content {
        width: 100%;
        padding: 2rem;
        text-align: center;
        display: flex;
        align-items: center;
        justify-content: space-around;
        background-color: var(--banner-bottom-background);
    }

    .banner__content_left {
        text-align: right;
        padding-right: 1rem;
    }

    .banner__content_left_flex {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .banner__content_logo {
        display: block;
        margin-top: 0.5rem;
        margin-bottom: 0.5rem;
        width: 282.47px;
    }

    .banner__button {
        display: flex;
        align-items: center;
        justify-content: center;
        margin: 0.5rem 0;
        width: 276px;
        color: var(--white);
        height: 37px;
        border-radius: 100px;
        transition: 0.3s;
    }

    .banner__button_trial {
        background-color: var(--trial-button-50);
    }

    .banner__button_trial:hover {
        background-color: var(--trial-button-20);
    }

    .banner__button_trial:active {
        background-color: var(--white);
        border: 1px solid var(--trial-button-50);
        color: var(--trial-button-50);
    }

    .banner__content_link {
        display: inline-block;
        position: relative;
        transition: 0.3s;
    }

    .banner__content_link:hover {
        color: var(--details-link-hover)
    }

    .banner__content_link:active {
        color: var(--details-link-click)
    }

    .banner__content_link svg {
        width: 8px;
        height: auto;
        position: absolute;
        top: 50%;
        transform: translateY(-50%);
        left: -12px;
    }

    .banner__banner__link_details {
        text-align: right;
        display: inline-block;
        position: relative;
    }

    .banner__pc_img img {
        height: 150px;
    }
}

@media (min-width: 1300px) {
    .banner__img img {
        min-width: 38vw;
        max-width: 40vw;
    }
}