* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    background-color: #f4f6f8;
    font-family: 'Pretendard', sans-serif;
}

/* PC 중앙 정렬 컨테이너 */
.main-container {
    max-width: 480px;
    margin: 0 auto;
    background-color: #fff;
    min-height: 100vh;
    box-shadow: 0 0 40px rgba(0,0,0,0.06);
    position: relative;
    display: flex;
    flex-direction: column;
}

/* 공통 버튼 디자인 */
.card-btn {
    font-size: 0.8rem;
    color: #275cac;
    background: #f0f5ff;
    padding: 8px 16px;
    border-radius: 30px;
    font-weight: 600;
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    flex-shrink: 0;
    min-width: 64px;
    transition: all 0.2s ease;
}

/* 준비 중 버튼 초기 스타일 */
.card-btn.secondary {
    background-color: #f0f5ff;
    color: #aaaaaa;
}

.footer {
    text-align: center;
    padding: 40px 20px;
    font-size: 0.8rem;
    color: #bbb;
}