/* 기본 스타일 리셋 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #333;
    line-height: 1.6;
}

/* 인증 컨테이너 */
.auth-container {
    background: white;
    padding: 2.5rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    max-width: 500px;
    width: 100%;
    margin: 1rem;
    text-align: center;
}

/* 제목 스타일 */
.auth-container h1 {
    color: #333;
    margin-bottom: 1.5rem;
    font-size: 2rem;
}

/* 문단 스타일 */
.auth-container p {
    color: #666;
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

/* 버튼 그룹 */
.button-group {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1.5rem;
}

/* 버튼 스타일 */
.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

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

/* 반응형 디자인 */
@media (min-width: 768px) {
    .button-group {
        flex-direction: row;
        justify-content: center;
    }
}