/* =============================================================================
   회원 소셜 로그인 (설계문서 10.6절)

   - 새 팔레트를 만들지 않는다. 기존 사이트 톤(하늘색 + GmarketSans 제목)을 확장한다.
   - 값은 common.css :root 의 --sf-* / --fn-* / --duration-* 토큰을 쓴다.
     여기서만 쓰는 값(공급자 브랜드 색 등)은 .mb-login 스코프에 지역 토큰으로 둔다.
   - 모션은 transform / opacity 만 쓴다. prefers-reduced-motion 에서는 제거한다.
   ============================================================================= */

.mb-login{
    /* 공급자 브랜드 색 — 각 사 버튼 가이드라인 값이라 임의로 바꾸지 않는다 */
    --mb-kakao: #FEE500;
    --mb-kakao-ink: rgba(0, 0, 0, 0.85);
    --mb-naver: #03C75A;
    --mb-naver-ink: #fff;

    --mb-muted-ink: #5c636a;
    --mb-muted-bg: #f1f3f5;
    --mb-muted-line: #ced4da;
    --mb-danger: #c2283c;
    --mb-danger-bg: #fdeef0;

    --mb-panel-max: 520px;

    display: flex;
    justify-content: center;
    width: 100%;
    padding: 0 20px;
    font-family: var(--fn-sans);
    color: var(--sf-ink);
    /* 패널 뒤로 옅은 하늘빛 — 흰 배경에 흰 카드가 떠 있는 인상을 피한다 */
    background-image: radial-gradient(120% 92% at 50% 0%, var(--sf-surface) 0%, rgba(244, 249, 253, 0) 64%);
}

/* ------------------------------------------------------------------ 패널 */

.mb-login__panel{
    position: relative;
    width: 100%;
    max-width: var(--mb-panel-max);
    padding: 48px 38px 38px;
    border-radius: var(--sf-radius);
    background-color: #fff;
    box-shadow: 0 26px 60px -34px rgba(0, 118, 206, 0.5),
                0 0 0 1px rgba(0, 118, 206, 0.07);
}

/* 패널 위로 살짝 걸쳐 나온 강조 띠 — 평평한 카드가 되지 않게 한다 */
.mb-login__panel::before{
    position: absolute;
    left: 38px;
    top: -6px;
    display: block;
    content: "";
    width: 64px;
    height: 12px;
    border-radius: 999px;
    background-image: linear-gradient(90deg, var(--sf-blue), var(--sf-sky));
}

/* ------------------------------------------------------------------ 타이포 */

.mb-login__eyebrow{
    display: flex;
    align-items: center;
    gap: 9px;
    font-family: var(--fn-gmk-md);
    font-size: 14px;
    letter-spacing: 0.04em;
    color: var(--sf-blue);
}
.mb-login__eyebrow::before{
    display: block;
    content: "";
    width: 20px;
    height: 2px;
    background-color: var(--sf-sky);
}

.mb-login__title{
    margin-top: 16px;
    font-family: var(--fn-gmk-bd);
    font-size: 30px;
    line-height: 1.34;
    letter-spacing: -0.02em;
    color: var(--sf-ink);
    word-break: keep-all;
}

.mb-login__lead{
    margin-top: 13px;
    font-size: 15px;
    line-height: 1.72;
    color: var(--sf-ink-sub);
    word-break: keep-all;
}

/* ------------------------------------------------------------------ 오류 */

.mb-login__error{
    margin-top: 22px;
    padding: 13px 16px;
    border-radius: var(--sf-radius-sm);
    border-left: 3px solid var(--mb-danger);
    background-color: var(--mb-danger-bg);
    font-size: 14px;
    font-weight: 500;
    line-height: 1.6;
    color: var(--mb-danger);
}

/* ------------------------------------------------------------------ 공급자 버튼 */

.mb-login__providers{
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 30px;
}

.mb-oauth{
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    min-height: 56px;
    padding: 0 18px;
    border-radius: var(--sf-radius-sm);
    font-size: 17px;
    font-weight: 700;
    letter-spacing: -0.02em;
    text-align: center;
    transition: transform var(--duration-fast) var(--ease-out-expo),
                opacity var(--duration-fast) var(--ease-out-expo);
}

.mb-oauth__mark{
    display: block;
    flex: 0 0 22px;
    width: 22px;
    height: 22px;
}
.mb-oauth__mark svg{
    display: block;
    width: 100%;
    height: 100%;
    fill: currentColor;
}

.mb-oauth--kakao{
    background-color: var(--mb-kakao);
    color: var(--mb-kakao-ink);
}
.mb-oauth--naver{
    background-color: var(--mb-naver);
    color: var(--mb-naver-ink);
}

/* 링크로 렌더링된 것(= 사용 가능한 공급자)만 상호작용 상태를 갖는다 */
a.mb-oauth:hover{
    transform: translateY(-2px);
}
a.mb-oauth:active{
    transform: translateY(0) scale(0.99);
}
a.mb-oauth:focus{
    outline: 3px solid var(--sf-blue);
    outline-offset: 3px;
}
a.mb-oauth:focus:not(:focus-visible){
    outline: none;
}
a.mb-oauth:focus-visible{
    outline: 3px solid var(--sf-blue);
    outline-offset: 3px;
}

/* 미설정 공급자 — 색뿐 아니라 점선 테두리와 배지로도 상태를 알린다 */
.mb-oauth.is-disabled{
    border: 1px dashed var(--mb-muted-line);
    background-color: var(--mb-muted-bg);
    color: var(--mb-muted-ink);
    cursor: not-allowed;
}
.mb-oauth__badge{
    flex: 0 0 auto;
    margin-left: 2px;
    padding: 3px 9px;
    border: 1px solid var(--mb-muted-line);
    border-radius: 999px;
    background-color: #fff;
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0;
    color: var(--mb-muted-ink);
}

/* ------------------------------------------------------------------ 수집 고지 */

.mb-login__notice{
    margin-top: 26px;
    padding-top: 20px;
    border-top: 1px solid var(--bd-color);
    font-size: 13px;
    line-height: 1.75;
    color: var(--sf-ink-sub);
    word-break: keep-all;
}
.mb-login__notice a{
    color: var(--sf-blue);
    text-decoration: underline;
    text-underline-offset: 2px;
}

/* ------------------------------------------------------------------ 반응형 */

@media all and (max-width: 768px){
    .mb-login__panel{
        padding: 42px 28px 32px;
    }
    .mb-login__panel::before{
        left: 28px;
    }
    .mb-login__title{
        font-size: 26px;
    }
}

@media all and (max-width: 480px){
    .mb-login{
        padding: 0 16px;
    }
    .mb-login__panel{
        padding: 36px 20px 28px;
        border-radius: var(--sf-radius-sm);
    }
    .mb-login__panel::before{
        left: 20px;
        width: 52px;
    }
    .mb-login__title{
        font-size: 23px;
    }
    .mb-oauth{
        min-height: 52px;
        padding: 0 14px;
        font-size: 16px;
    }
    .mb-oauth__badge{
        padding: 2px 7px;
        font-size: 11px;
    }
}

@media (prefers-reduced-motion: reduce){
    .mb-oauth{
        transition-duration: 1ms !important;
    }
    a.mb-oauth:hover,
    a.mb-oauth:active{
        transform: none;
    }
}
.mb-join { padding-top: 72px; padding-bottom: 96px; }
.mb-join__card { max-width: 560px; }
.mb-field { display:block; margin:20px 0; font-weight:700; }
.mb-field input { box-sizing:border-box; width:100%; margin-top:8px; padding:14px; border:1px solid #d5dbe1; border-radius:8px; font:inherit; }
.mb-field__row { display:flex; gap:8px; align-items:flex-end; }
.mb-field__row input { flex:1; }
.mb-field__row button, .mb-join__submit { min-height:48px; padding:0 18px; border:0; border-radius:8px; background:#0076ce; color:#fff; font-weight:700; cursor:pointer; }
.mb-field__row button:disabled { background:#9aa6af; cursor:not-allowed; }
.mb-code-input { position:relative; display:flex; flex:1; align-items:center; }
.mb-code-input input { padding-right:70px; }
.mb-code-timer { position:absolute; right:14px; bottom:15px; color:#c2283c; font-size:14px; font-weight:700; }
.mb-consent { display:block; margin:24px 0; line-height:1.6; }
.mb-join__message { min-height:24px; color:#c0392b; }
.mb-join__submit { width:100%; }
.mb-join__cancel { margin-top:24px; padding-top:22px; border-top:1px solid #e1e6ea; text-align:center; }
.mb-join__cancel p { color:#68737c; font-size:13px; line-height:1.6; word-break:keep-all; }
.mb-join__cancel button { margin-top:10px; padding:8px 4px; border:0; background:transparent; color:#4f5b64; font:inherit; font-size:14px; text-decoration:underline; text-underline-offset:3px; cursor:pointer; }
.mb-join__cancel button:hover { color:#0076ce; }
.mb-join__cancel button:focus-visible { outline:2px solid #0076ce; outline-offset:3px; }
@media all and (max-width: 480px){
    .mb-join { padding-top:48px; padding-bottom:64px; }
    .mb-field__row button { padding:0 12px; }
}