.auth-dialog {
    width: min(520px, calc(100% - 32px));
    padding: 0;
    border: 2px solid var(--line, #252820);
    background: var(--paper-light, #fffdf6);
    color: var(--ink, #171a17);
    box-shadow: 12px 12px 0 rgba(23, 26, 23, 0.35);
}

.auth-dialog::backdrop { background: rgba(23, 26, 23, 0.72); }
.auth-dialog-inner { padding: 34px; }

.auth-dialog-topline {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
    margin-bottom: 24px;
}

.auth-dialog-label {
    margin: 0;
    color: var(--green, #315c45);
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.auth-dialog-close {
    width: 38px;
    height: 38px;
    border: 1.5px solid var(--line, #252820);
    background: transparent;
    color: var(--ink, #171a17);
    cursor: pointer;
    font-size: 1.25rem;
}

.auth-dialog h2 {
    margin: 0 0 12px;
    font-family: 'Playfair Display', 'Noto Sans TC', serif;
    font-size: clamp(2rem, 7vw, 3.25rem);
    line-height: 1;
}

.auth-dialog-copy {
    margin: 0 0 28px;
    color: var(--muted, #67685f);
}

.auth-dialog-actions { display: grid; gap: 10px; }

.auth-dialog-action {
    display: block;
    padding: 13px 16px;
    border: 2px solid var(--line, #252820);
    background: transparent;
    color: var(--ink, #171a17);
    font-weight: 700;
    text-align: center;
    text-decoration: none;
}

.auth-dialog-action.primary {
    background: var(--green, #315c45);
    color: #fff;
    border-color: var(--green, #315c45);
}

.auth-dialog-action.google { background: #fff; }

.auth-dialog-action.google span {
    margin-right: 8px;
    color: #4285f4;
    font-family: sans-serif;
}

.auth-dialog-footnote {
    margin: 16px 0 0;
    color: var(--muted, #67685f);
    font-size: 0.82rem;
    line-height: 1.6;
    text-align: center;
}

@media (max-width: 520px) {
    .auth-dialog-inner { padding: 26px 22px; }
}