:root {
    --gyu-login-primary: #2e366e;
    --gyu-login-primary-strong: #223077;
    --gyu-login-panel: #f7f8fc;
    --gyu-login-field: #edf3ff;
    --gyu-login-text: #172033;
    --gyu-login-muted: #414a73;
    --gyu-login-line: #91a9df;
    --gyu-login-focus: #ffb300;
    --gyu-login-radius: 20px;
}

.gyu-login-page {
    min-width: 320px;
    min-height: 100dvh;
    margin: 0;
    overflow-x: hidden;
    background: #181a1b;
    color: var(--gyu-login-text);
    font-family: Pretendard, "Noto Sans KR", "Malgun Gothic", sans-serif;
}

.gyu-login-page *,
.gyu-login-page *::before,
.gyu-login-page *::after {
    box-sizing: border-box;
}

.gyu-login-stage {
    min-height: 100dvh;
    padding: 24px 0 48px;
    background: #000 url('/portal-assets/bg_img_gyu02.png') center / cover no-repeat;
}

.gyu-login-wrap {
    width: min(600px, calc(100% - 32px));
    margin: 0 auto;
    text-align: center;
}

.gyu-login-brand {
    color: #fff;
    text-shadow: 0 2px 12px rgba(0, 0, 0, .45);
}

.gyu-login-brand img {
    display: block;
    width: 180px;
    height: 110px;
    margin: 0 auto 6px;
    object-fit: contain;
}

.gyu-login-brand h1 {
    margin: 0;
    color: #fff;
    font-size: 36px;
    font-weight: 700;
    line-height: 1.25;
    letter-spacing: -.04em;
}

.gyu-login-brand p {
    margin: 8px 0 90px;
    color: #fff;
    font-size: 12px;
    font-weight: 400;
    line-height: 1.5;
    letter-spacing: .42em;
}

.gyu-login-card {
    position: relative;
    width: 100%;
    padding: 40px 40px 30px;
    border-radius: var(--gyu-login-radius);
    background: #fff;
    text-align: left;
}

.gyu-login-card-title {
    position: absolute;
    top: -50px;
    left: 70px;
    right: 70px;
    display: grid;
    min-height: 79px;
    margin: 0;
    place-items: center;
    border-radius: 999px;
    background: var(--gyu-login-primary-strong);
    color: #fff;
    font-size: 26px;
    font-weight: 700;
    line-height: 1.2;
    text-align: center;
}

.gyu-auth-panel {
    min-height: 496px;
    padding: 28px 40px 24px;
    border-radius: var(--gyu-login-radius);
    background: var(--gyu-login-panel);
}

.gyu-auth-heading {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0 0 18px;
    color: #12213c;
    font-size: 20px;
    font-weight: 700;
    line-height: 1.4;
}

.gyu-auth-heading::before {
    content: "";
    display: block;
    width: 12px;
    height: 15px;
    border: 2px solid currentColor;
    border-radius: 7px 7px 3px 3px;
    box-shadow: inset 0 -4px 0 rgba(34, 48, 119, .22);
}

.gyu-login-field {
    margin-top: 10px;
}

.gyu-login-field label {
    display: block;
    margin: 0 0 5px;
    color: #15233d;
    font-size: 16px;
    font-weight: 600;
    line-height: 1.35;
}

.gyu-login-field input {
    width: 100%;
    min-height: 49px;
    margin: 0;
    padding: 0 14px;
    border: 1px solid var(--gyu-login-line);
    border-radius: 10px;
    background: var(--gyu-login-field);
    color: var(--gyu-login-text);
    font-size: 16px;
    transition: border-color .2s ease, box-shadow .2s ease, background-color .2s ease;
}

.gyu-login-field input::placeholder {
    color: #65718a;
    opacity: 1;
}

.gyu-login-field input:hover {
    border-color: #647dc0;
}

.gyu-login-field input:focus-visible {
    border-color: #34368a;
    outline: 2px solid transparent;
    background: #fff;
    box-shadow: 0 0 0 3px rgba(52, 54, 138, .2);
}

.gyu-login-submit {
    width: 100%;
    min-height: 56px;
    margin: 24px 0 12px;
    padding: 0 18px;
    border: 0;
    border-radius: 10px;
    background: rgba(46, 54, 110, .9);
    color: #fff;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color .2s ease, transform .1s ease;
}

.gyu-login-submit:hover {
    background: var(--gyu-login-primary);
}

.gyu-login-submit:active {
    transform: scale(.99);
}

.gyu-login-submit:disabled {
    cursor: wait;
    opacity: .72;
}

.gyu-login-submit:focus-visible,
.gyu-login-guides summary:focus-visible,
.gyu-login-links a:focus-visible {
    outline: 3px solid var(--gyu-login-focus);
    outline-offset: 3px;
}

.gyu-login-error {
    margin: 0 0 14px;
    padding: 10px 12px;
    border: 1px solid #e8a1ae;
    border-radius: 8px;
    background: #fff1f2;
    color: #9f1239;
    font-size: 14px;
    font-weight: 700;
    line-height: 1.5;
}

.gyu-login-error:focus {
    outline: 3px solid rgba(159, 18, 57, .22);
    outline-offset: 2px;
}

.gyu-login-guides {
    margin-top: 2px;
}

.gyu-login-guides details {
    color: var(--gyu-login-primary-strong);
}

.gyu-login-guides summary {
    position: relative;
    min-height: 36px;
    padding: 8px 4px 8px 18px;
    color: var(--gyu-login-primary-strong);
    font-size: 16px;
    line-height: 1.25;
    list-style: none;
    cursor: pointer;
}

.gyu-login-guides summary::-webkit-details-marker {
    display: none;
}

.gyu-login-guides summary::before {
    content: "";
    position: absolute;
    top: 50%;
    left: 0;
    width: 0;
    height: 0;
    border-top: 5px solid transparent;
    border-bottom: 5px solid transparent;
    border-left: 8px solid currentColor;
    transform: translateY(-50%);
    transition: transform .2s ease;
}

.gyu-login-guides details[open] summary::before {
    transform: translateY(-50%) rotate(90deg);
}

.gyu-login-guides details > div {
    margin: 0 0 7px;
    padding: 8px 10px;
    background: #eff2fe;
}

.gyu-login-guides details p {
    margin: 0;
    color: #4f596d;
    font-size: 13px;
    line-height: 1.5;
}

.gyu-login-guides details .gyu-guide-warning {
    margin-top: 5px;
    color: #b4233e;
    font-weight: 700;
}

.gyu-browser-note {
    margin: 14px 0 0;
    padding: 10px;
    background: #eff2fe;
    color: var(--gyu-login-muted);
    font-size: 15px;
    line-height: 1.4;
}

.gyu-login-links {
    display: grid;
    grid-template-columns: 1.35fr 1fr 1fr;
    gap: 8px;
    padding-top: 24px;
}

.gyu-login-links a {
    display: inline-flex;
    min-height: 44px;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    color: #111827;
    font-size: 16px;
    text-align: center;
    text-decoration: none;
    transition: background-color .2s ease, color .2s ease;
}

.gyu-login-links a:first-child {
    color: #4f62e7;
}

.gyu-login-links a:hover {
    background: #eef1f7;
    color: var(--gyu-login-primary-strong);
}

@media (max-width: 640px) {
    .gyu-login-stage {
        padding: 20px 0 32px;
    }

    .gyu-login-wrap {
        width: min(100% - 24px, 600px);
    }

    .gyu-login-brand img {
        width: 140px;
        height: auto;
        margin-bottom: 4px;
    }

    .gyu-login-brand h1 {
        font-size: 30px;
    }

    .gyu-login-brand p {
        margin-bottom: 68px;
        font-size: 10px;
        letter-spacing: .25em;
    }

    .gyu-login-card {
        padding: 34px 20px 20px;
    }

    .gyu-login-card-title {
        top: -46px;
        left: 10%;
        right: 10%;
        min-height: 72px;
        font-size: 24px;
    }

    .gyu-auth-panel {
        min-height: 0;
        padding: 24px 18px 18px;
    }

    .gyu-login-links {
        grid-template-columns: 1fr 1fr;
    }

    .gyu-login-links a:first-child {
        grid-column: 1 / -1;
    }
}

@media (max-width: 380px) {
    .gyu-login-card {
        padding-inline: 14px;
    }

    .gyu-auth-panel {
        padding-inline: 14px;
    }

    .gyu-browser-note {
        font-size: 13px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .gyu-login-page *,
    .gyu-login-page *::before,
    .gyu-login-page *::after {
        scroll-behavior: auto !important;
        transition: none !important;
    }
}