/* CMS / B-admin login shell: shared operational login experience. */

* {
    box-sizing: border-box;
}

html,
body {
    min-height: 100%;
}

body.login-body {
    margin: 0;
    min-height: 100vh;
    font-family: var(--font-admin, 'Noto Sans TC', 'Microsoft JhengHei', sans-serif);
    font-weight: 400;
    color: var(--text-body);
    background: var(--neutral-secondary-soft);
}

.login-page {
    position: relative;
    isolation: isolate;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    overflow-x: hidden;
}

.login-page::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -2;
    background:
        linear-gradient(90deg, color-mix(in srgb, var(--border-default) 42%, transparent) 1px, transparent 1px),
        linear-gradient(0deg, color-mix(in srgb, var(--border-default) 42%, transparent) 1px, transparent 1px);
    background-size: 80px 80px;
    opacity: .16;
}

.login-page::after {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    background:
        linear-gradient(180deg, color-mix(in srgb, var(--neutral-primary) 88%, transparent) 0%, transparent 58%),
        linear-gradient(135deg, color-mix(in srgb, var(--brand-softer) 28%, transparent) 0%, transparent 46%);
    opacity: .82;
}

.login-shell {
    width: min(420px, 100%);
    min-height: auto;
    display: block;
    overflow: visible;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
}

.login-identity {
    min-width: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 26px;
    border-right: 0;
    background: transparent;
}

.login-panel {
    min-width: 0;
    width: 100%;
    padding: 32px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    background: var(--neutral-primary);
    box-shadow: none;
}

.login-card-brand {
    margin-bottom: 22px;
    text-align: center;
}

.login-brand-lockup {
    display: flex;
    align-items: center;
    gap: 16px;
    min-width: 0;
}

.login-mark {
    width: 60px;
    height: 60px;
    margin: 0 auto 14px;
    flex: 0 0 60px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border: 1px solid var(--border-brand-subtle);
    border-radius: var(--radius-md);
    background: var(--brand-softer);
    color: var(--fg-brand);
    box-shadow: none;
}

.login-mark i,
.login-mark svg {
    width: 26px;
    height: 26px;
    font-size: 24px;
}

.login-mark img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: 8px;
    background: var(--neutral-primary);
}

.login-kicker,
.login-panel-kicker {
    margin: 0;
    color: var(--fg-brand);
    font-size: .82rem;
    font-weight: 600;
}

.login-brand-title {
    margin: 3px 0 0;
    color: var(--text-heading);
    font-size: 1.35rem;
    font-weight: 600;
    line-height: 1.25;
    overflow-wrap: anywhere;
    text-align: center;
}

.login-brand-sub {
    margin: 5px 0 0;
    color: var(--text-body-subtle);
    font-size: .92rem;
    text-align: center;
}

.login-meta-list {
    border-top: 1px solid var(--border-default);
}

.login-meta-row {
    min-height: 42px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    border-bottom: 1px solid var(--border-default);
}

.login-meta-row span {
    color: var(--text-body-subtle);
    font-size: .84rem;
}

.login-meta-row strong {
    color: var(--text-heading);
    font-size: .9rem;
    font-weight: 600;
    text-align: right;
    overflow-wrap: anywhere;
}

.login-panel-head {
    margin-bottom: 24px;
    text-align: center;
}

.login-panel-head h2 {
    margin: 5px 0 0;
    color: var(--text-heading);
    font-size: 1.55rem;
    font-weight: 600;
    line-height: 1.25;
}

.login-panel-head p {
    margin: 8px 0 0;
    color: var(--text-body-subtle);
    font-size: .92rem;
    line-height: 1.55;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.form-group {
    margin: 0;
}

.form-label {
    display: flex;
    align-items: center;
    gap: 7px;
    margin-bottom: 8px;
    color: var(--text-heading);
    font-size: .9rem;
    font-weight: 500;
}

.form-label i,
.form-label svg {
    width: 15px;
    color: var(--text-body-subtle);
}

.login-field-wrap,
.password-wrapper {
    position: relative;
}

.form-input {
    display: block;
    width: 100%;
    height: var(--field-height, 40px);
    padding: 0 var(--field-pad-x, 12px);
    line-height: calc(var(--field-height, 40px) - 2px);
    border: 1px solid var(--border-default-medium);
    border-radius: var(--field-radius, 8px);
    background: var(--neutral-secondary-medium);
    color: var(--text-heading);
    font-family: inherit;
    font-size: var(--field-font-size, .9rem);
    box-shadow: var(--shadow-xs);
    transition: border-color .15s ease, box-shadow .15s ease, background .15s ease;
}

.form-input:hover {
    border-color: var(--border-default-strong);
}

.form-input:focus {
    outline: none;
    border-color: var(--border-brand);
    box-shadow: 0 0 0 1px var(--brand), var(--shadow-xs);
}

.form-input.error {
    border-color: var(--border-danger);
}

.form-input::placeholder {
    color: var(--text-body-subtle);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible {
    outline: 2px solid var(--border-brand);
    outline-offset: 2px;
}

.form-error {
    margin-top: 5px;
    color: var(--fg-danger);
    font-size: .78rem;
}

.password-toggle,
.login-password-toggle {
    position: absolute;
    right: 7px;
    top: 50%;
    width: 32px;
    height: 32px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transform: translateY(-50%);
    border: 0;
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--text-body-subtle);
    cursor: pointer;
}

.password-toggle:hover,
.login-password-toggle:hover {
    color: var(--text-heading);
    background: var(--neutral-secondary-medium);
}

.captcha-wrapper {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
    align-items: center;
}

.captcha-img-wrapper {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.captcha-img {
    display: block;
    width: 112px;
    height: var(--field-height, 40px);
    object-fit: cover;
    border: 1px solid var(--border-default);
    border-radius: var(--radius-sm);
    background: var(--neutral-primary);
    cursor: pointer;
}

.captcha-refresh {
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 0;
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--text-body-subtle);
    cursor: pointer;
    transition: background .15s ease, color .15s ease;
}

.captcha-refresh:hover {
    background: var(--neutral-secondary-medium);
    color: var(--fg-brand);
}

.error-alert,
.login-alert {
    display: flex;
    align-items: center;
    gap: 9px;
    margin: 0;
    padding: 11px 12px;
    border: 1px solid var(--border-danger-subtle);
    border-radius: var(--radius-md);
    background: var(--danger-soft);
    color: var(--fg-danger-strong);
    font-size: .88rem;
    line-height: 1.45;
}

.error-alert i,
.login-alert i,
.login-alert svg {
    flex: 0 0 auto;
    color: var(--fg-danger);
}

.login-panel > .login-alert {
    margin-bottom: 18px;
}

.btn-login {
    position: relative;
    overflow: hidden;
    width: 100%;
    height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border: 1px solid transparent;
    border-radius: var(--control-radius, 8px);
    background: var(--brand);
    color: var(--b-on-primary, #fff);
    box-shadow: var(--shadow-xs), var(--btn-glint);
    cursor: pointer;
    font-family: inherit;
    font-size: .98rem;
    font-weight: 600;
    transition: background .15s ease, box-shadow .15s ease, transform .15s ease;
}

.btn-login:hover {
    background: var(--brand-strong);
}

.btn-login:active {
    transform: translateY(1px);
}

.btn-login:focus-visible {
    outline: none;
    box-shadow: var(--shadow-xs), var(--btn-glint), 0 0 0 4px var(--brand-medium);
}

.btn-login:disabled {
    background: var(--disabled);
    color: var(--fg-disabled);
    box-shadow: none;
    cursor: not-allowed;
    transform: none;
}

/* ── 登入中填色動畫：::before 以 --brand-strong 由左至右填色。
   送出 → is-loading 慢速填到 55% 等待回應；
   成功 → is-success 快速補滿後跳轉；
   失敗 → 移除 is-loading，回到基準 scaleX(0)（自帶縮回過渡）。 ── */
.btn-login::before {
    content: "";
    position: absolute;
    inset: 0;
    background: var(--brand-strong);
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform .45s cubic-bezier(.22, 1, .36, 1);
    pointer-events: none;
}

.btn-login > * {
    position: relative;
    z-index: 1;
}

.btn-login.is-loading {
    background: var(--brand);      /* 鎖住底色，避免 hover 的 --brand-strong 蓋掉填色對比 */
    pointer-events: none;
}

.btn-login.is-loading::before {
    transform: scaleX(.55);
    transition-duration: 1.1s;     /* 慢速爬行，營造「處理中」感 */
}

.btn-login.is-success::before {
    transform: scaleX(1);
    transition-duration: .3s;
}

@media (prefers-reduced-motion: reduce) {
    .btn-login::before {
        transition-duration: .01s !important;
    }
}

.login-panel-foot {
    margin-top: 22px;
    padding-top: 18px;
    border-top: 1px solid var(--border-default);
}

.login-back-link {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    color: var(--text-body);
    text-decoration: none;
    font-size: .88rem;
    font-weight: 500;
    transition: color .15s ease;
}

.login-back-link:hover {
    color: var(--fg-brand);
}

.login-copyright {
    position: absolute;
    left: 24px;
    right: 24px;
    bottom: 16px;
    width: min(420px, 100%);
    margin: 0 auto;
    color: var(--text-body-subtle);
    font-size: .78rem;
    text-align: center;
}

@media (max-width: 860px) {
    .login-page {
        padding: 16px;
    }

    .login-shell {
        min-height: auto;
    }

    .login-identity {
        padding: 8px 0 0;
        gap: 22px;
        border-right: 0;
        border-bottom: 0;
    }

    .login-panel {
        padding: 28px;
    }

    .login-copyright {
        text-align: center;
    }
}

@media (max-width: 520px) {
    .login-page {
        padding: 12px;
    }

    .login-brand-lockup {
        align-items: flex-start;
    }

    .login-mark {
        width: 52px;
        height: 52px;
        flex-basis: 52px;
    }

    .login-panel,
    .login-identity {
        padding: 22px;
    }

    .captcha-wrapper {
        grid-template-columns: 1fr;
    }

    .captcha-img-wrapper {
        justify-content: space-between;
    }

    .captcha-img {
        width: min(160px, calc(100vw - 112px));
    }
}

@media (prefers-reduced-motion: reduce) {
    .form-input,
    .captcha-refresh,
    .btn-login,
    .login-back-link {
        transition: none;
    }
}