.auth-container {
    max-width: 400px;
    margin: 40px auto;
    padding: 0 var(--space-4);
}

.auth-container h1 {
    text-align: center;
    margin-bottom: var(--space-5);
    font-size: 28px;
    font-weight: 600;
    color: var(--fg);
}

.auth-container hr {
    border: none;
    height: 1px;
    background: var(--line);
    margin-bottom: var(--space-6);
}

/* 폼 스타일 */
.auth-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.form-group label {
    font-weight: 500;
    color: var(--fg);
    font-size: 14px;
}

.form-group input {
    padding: 12px var(--space-4);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--bg);
    color: var(--fg);
    font-size: 15px;
    transition: border-color .15s ease, box-shadow .15s ease;
}

.form-group input::placeholder {
    color: var(--muted);
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 20%, transparent);
}

/* 에러 메시지 */
.error-message {
    color: #dc3545;
    font-size: 13px;
    margin-top: var(--space-1);
}

.error-alert {
    background: color-mix(in srgb, #dc3545 10%, transparent);
    color: #dc3545;
    padding: var(--space-3);
    border-radius: var(--radius);
    border: 1px solid color-mix(in srgb, #dc3545 30%, transparent);
    text-align: center;
    font-size: 14px;
}

/* 버튼 */
.auth-button {
    padding: 14px;
    background: var(--accent);
    color: var(--accent-fg);
    border: none;
    border-radius: var(--radius);
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: filter .15s ease, transform .02s ease;
    margin-top: var(--space-3);
}

.auth-button:hover {
    filter: brightness(1.05);
}

.auth-button:active {
    transform: translateY(1px);
}

/* 반응형 */
@media (max-width: 480px) {
    .auth-container {
        max-width: none;
        margin: var(--space-5) var(--space-4);
    }

    .auth-container h1 {
        font-size: 24px;
    }
}