/* 登录与注册页 */
.auth-shell {
    display: grid;
    justify-items: center;
    padding: 32px 0 44px;
}

.auth-card {
    width: min(100%, 680px);
}

.auth-card-wide {
    width: min(100%, 720px);
}

.auth-card h1 {
    margin: 0;
    font-size: clamp(28px, 4vw, 36px);
    line-height: 1.2;
}

.auth-card > p {
    margin: 10px 0 0;
    color: var(--muted);
}

.auth-mode-switch {
    display: inline-grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    width: 100%;
    margin-top: 18px;
    padding: 8px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: var(--surface-soft);
}

.auth-mode-btn {
    min-height: 42px;
    padding: 0 14px;
    border-radius: 12px;
    background: transparent;
    color: var(--muted);
    cursor: pointer;
    transition: all var(--transition);
}

.auth-mode-btn.active {
    background: #fff;
    color: var(--brand-deep);
    box-shadow: 0 8px 18px rgba(15, 23, 42, 0.06);
}

.auth-mode-panel {
    margin-top: 20px;
}

.send-code-btn {
    min-width: 120px;
}

.auth-script-message {
    margin-top: 8px;
}

@media (max-width: 720px) {
    .auth-shell {
        padding: 20px 0 36px;
    }

    .auth-mode-switch {
        grid-template-columns: 1fr;
    }

    .send-code-btn {
        width: 100%;
    }
}