.auth-container {
    flex: 0 0 auto;
    width: 100%;
    max-width: 420px;
    margin: 0.8rem auto auto;
    padding: 1.25rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow-sm);
    text-align: left;
}

.auth-shell {
    max-width: 920px;
    display: grid;
    grid-template-columns: minmax(0, 420px) minmax(0, 1fr);
    gap: 1rem;
    align-items: stretch;
    border: 0;
    background: transparent;
    box-shadow: none;
    padding: 0 1.25rem;
}

.auth-card {
    min-width: 0;
}

.auth-shell .auth-card,
.auth-benefits {
    min-width: 0;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow-sm);
    padding: 1.25rem;
}

.auth-benefits {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 0.85rem;
}

.auth-benefits strong {
    color: var(--text-main);
    font-size: 1rem;
    font-weight: 850;
}

.auth-benefits p,
.auth-benefits li {
    color: var(--text-sub);
    font-size: 0.9rem;
    line-height: 1.6;
}

.auth-benefits ul,
.auth-step-list {
    display: grid;
    gap: 0.45rem;
    margin: 0;
    padding-left: 1.1rem;
}

.auth-step-list {
    counter-reset: auth-step;
    padding-left: 0;
    list-style: none;
}

.auth-step-list li {
    counter-increment: auth-step;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.auth-step-list li::before {
    width: 1.55rem;
    height: 1.55rem;
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    background: var(--primary-soft);
    color: var(--primary);
    content: counter(auth-step);
    font-size: 0.78rem;
    font-weight: 850;
}

.auth-benefit-link {
    width: fit-content;
}

.auth-container h1,
.auth-container h2 {
    margin-bottom: 0.5rem;
    color: var(--text-main);
    font-size: 1.45rem;
    font-weight: 800;
    text-align: center;
}

.auth-subtitle {
    margin-bottom: 1rem;
    color: var(--text-sub);
    font-size: 0.9rem;
    line-height: 1.55;
    text-align: center;
}

.input-group {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0.45rem;
    margin-bottom: 0.75rem;
}

.input-group input {
    margin-bottom: 0;
}

.input-group button {
    min-height: 38px;
    width: auto;
    padding: 0.45rem 0.7rem;
    margin-top: 0;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background-color: var(--surface);
    color: var(--text-main);
    box-shadow: none;
    font-size: 0.86rem;
    font-weight: 700;
    white-space: nowrap;
    cursor: pointer;
}

.input-group button:hover {
    border-color: var(--border-strong);
    background-color: var(--surface-muted);
}

input {
    width: 100%;
    min-height: 38px;
    margin-bottom: 0.75rem;
    padding: 0.48rem 0.7rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background-color: var(--surface);
    color: var(--text-main);
    font-size: 0.94rem;
    transition: border-color 0.16s ease, box-shadow 0.16s ease, background-color 0.16s ease;
}

input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: var(--focus-ring);
}

input[readonly],
input[disabled] {
    background-color: var(--surface-muted);
    color: var(--text-sub);
    cursor: not-allowed;
}

button.btn-login,
button.btn-join {
    width: 100%;
    min-height: 38px;
    margin-top: 0.25rem;
    padding: 0.5rem 0.8rem;
    border: 1px solid var(--primary);
    border-radius: var(--radius);
    background-color: var(--primary);
    color: #ffffff;
    font-size: 0.94rem;
    font-weight: 800;
    cursor: pointer;
    transition: background-color 0.16s ease, border-color 0.16s ease;
}

button.btn-login:hover,
button.btn-join:hover {
    border-color: var(--primary-hover);
    background-color: var(--primary-hover);
}

.btn-secondary-auth {
    width: 100%;
    min-height: 38px;
    margin: 0 0 0.75rem;
    padding: 0.48rem 0.7rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    color: var(--text-main);
    font-size: 0.9rem;
    font-weight: 800;
    cursor: pointer;
    transition: background-color 0.16s ease, border-color 0.16s ease, color 0.16s ease;
}

.btn-secondary-auth:hover {
    border-color: var(--border-strong);
    background: var(--surface-muted);
}

.btn-danger-auth {
    width: 100%;
    min-height: 38px;
    margin-top: 0.75rem;
    padding: 0.5rem 0.8rem;
    border: 1px solid var(--negative-soft);
    border-radius: var(--radius);
    background: #fff7f7;
    color: var(--negative);
    font-size: 0.94rem;
    font-weight: 800;
    cursor: pointer;
    transition: background-color 0.16s ease, border-color 0.16s ease;
}

.btn-danger-auth:hover {
    border-color: var(--negative);
    background: var(--negative-soft);
}

button:disabled {
    background-color: var(--surface-strong);
    border-color: var(--border);
    color: var(--text-muted);
    cursor: not-allowed;
}

.error {
    margin-bottom: 0.75rem;
    padding: 0.65rem 0.75rem;
    border: 1px solid var(--negative-soft);
    border-radius: var(--radius);
    background-color: #fff7f7;
    color: var(--negative);
    font-size: 0.86rem;
    line-height: 1.5;
}

.auth-links {
    margin-top: 1rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.45rem 0.75rem;
    color: var(--text-sub);
    font-size: 0.88rem;
    text-align: center;
}

.auth-links a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 800;
}

.auth-links a:hover {
    text-decoration: underline;
}

.agreement-section {
    margin: 0.85rem 0 1rem;
    text-align: left;
}

.agreement-section p {
    margin-bottom: 0.45rem;
    color: var(--text-main);
    font-size: 0.88rem;
    font-weight: 800;
}

.scroll-box {
    height: 104px;
    margin-bottom: 0.6rem;
    padding: 0.75rem;
    overflow-y: auto;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface-muted);
    color: var(--text-sub);
    font-size: 0.82rem;
    line-height: 1.55;
}

.agreement-section label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-main);
    font-size: 0.9rem;
    cursor: pointer;
}

.agreement-section input[type="checkbox"] {
    width: 1rem;
    height: 1rem;
    min-height: 1rem;
    margin: 0;
    flex: 0 0 auto;
    accent-color: var(--primary);
}

.agreement-row {
    min-width: 0;
    margin: 0.85rem 0 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-main);
    font-size: 0.88rem;
    line-height: 1.45;
    cursor: pointer;
}

.agreement-row input[type="checkbox"] {
    width: 1rem;
    height: 1rem;
    min-height: 1rem;
    margin: 0;
    flex: 0 0 auto;
    accent-color: var(--primary);
}

.auth-field {
    margin-bottom: 0.75rem;
}

.auth-field label {
    display: block;
    margin-bottom: 0.35rem;
    color: var(--text-main);
    font-size: 0.88rem;
    font-weight: 800;
}

.auth-field input {
    margin-bottom: 0;
}

.auth-link-danger {
    padding: 0;
    border: none;
    background: none;
    color: var(--negative);
    font-size: 0.92rem;
    font-weight: 800;
    cursor: pointer;
}

.auth-link-danger:hover {
    text-decoration: underline;
}

.auth-divider {
    margin-top: 1.1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
    text-align: center;
}

#withdrawModal .modal-content {
    max-width: 360px;
    text-align: center;
}

#withdrawModal .modal-text {
    color: var(--text-sub);
    font-size: 0.92rem;
    line-height: 1.6;
}

#withdrawModal .modal-actions {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
}

@media (max-width: 480px) {
    .auth-shell {
        grid-template-columns: 1fr;
        padding: 0 1rem;
    }

    .auth-benefits {
        order: -1;
    }

    .input-group {
        grid-template-columns: 1fr;
    }

    .input-group button {
        width: 100%;
    }
}