/* css/layout.css */
#cover-page {
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    color: var(--cover-text-color);
    padding: 20px;
    box-sizing: border-box;
}

.container {
    max-width: calc(95vw - 180px);
    margin: 40px auto;
    background-color: var(--container-bg-color);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 8px 25px var(--container-shadow-color);
    box-sizing: border-box;
}

footer {
    text-align: center;
    margin-top: 60px;
    padding-top: 30px;
    border-top: 1px solid var(--footer-border-color);
    font-size: 1em;
    color: var(--footer-text-color);
}

.inter-chapter-cover {
    background-color: var(--primary-color);
    color: var(--cover-text-color);
    padding: 60px 20px;
    margin: 80px -40px 50px -40px; /* .container의 padding을 고려하여 좌우로 확장 */
    text-align: center;
    border-radius: 6px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}
.inter-chapter-cover h2 {
    color: var(--cover-text-color);
    border-bottom: none;
    margin: 0;
    font-size: 2.2em;
}

/* "다음 장에서 새로 시작" 효과 */
.container > section.content-section { /* 머리말, 개요, 각 장, 연습문제 등 */
    margin-bottom: 80px;
    padding-bottom: 40px;
    /* 섹션 간의 구분선은 inter-chapter-cover가 대신하므로 제거 또는 약하게 */
}

.container > section.content-section:last-of-type { /* 마지막 섹션은 하단 여백 줄임 */
     margin-bottom: 20px; /* 푸터와의 간격 */
     padding-bottom: 20px;
}

/* 표지 스크롤 힌트 */
#cover-page .scroll-down-hint {
    margin-top: 30px;
    font-size: 1em;
    animation: bounce 2s infinite;
}
#cover-page .scroll-down-hint a {
    color: var(--cover-text-color);
    text-decoration: none;
    padding: 10px 20px;
    border: 1px solid var(--cover-scroll-border-color);
    border-radius: 20px;
    transition: background-color 0.3s, color 0.3s;
}
 #cover-page .scroll-down-hint a:hover {
    background-color: var(--cover-text-color);
    color: var(--primary-color);
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {transform: translateY(0);}
    40% {transform: translateY(-10px);}
    60% {transform: translateY(-5px);}
}




@media (max-width: 720px) {
    .container {
        max-width: calc(85%);
        margin: 0 auto;
        background-color: var(--container-bg-color);
        padding: 15px;
        border-radius: 12px;
        box-shadow: 0 8px 25px var(--container-shadow-color);        
        box-sizing: border-box;
        overflow-x: hidden;
    }
}