body {
    margin: 0;
    padding: 0;
    font-family: "Segoe UI", "Pretendard", sans-serif;
    background: #f3f4f6;
    color: #1f2937;
}

a {
    color: #2563eb;
    text-decoration: none;
    transition: 0.2s;
}
a:hover {
    color: #1d4ed8;
}

/* 리스트 */
li {
    list-style: none;
    margin: 8px 0;
}

header {
    width: 100%;
    background: linear-gradient(90deg, #ffecd2, #c5b1aa);
    padding: 20px 0;
    margin: 0;
    border-radius: 0;
    box-shadow: 0 3px 12px rgba(0,0,0,0.12);
}

/* 내부 영역 중앙 정렬 */
.header-inner {
    width: 90%;
    margin: 0 auto;
}

header h1 {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    font-size: 30px;
    color: #4a3425;
    margin: 10px 0;
}

header h1 img {
    width: 60px;
}

/* 메뉴(nav) */
nav ul {
    padding: 0;
    margin-top: 15px;
    text-align: center;
}

nav ul li {
    display: inline-block;
    padding: 10px 18px;
    margin: 0 12px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.45);
    backdrop-filter: blur(4px);
    transition: 0.3s;
}

nav ul li:hover {
    background: rgba(255, 255, 255, 0.7);
}

nav ul li a {
    color: #5a3827; /* 따뜻한 갈색 */
    font-weight: bold;
    font-size: 17px;
}


section {
    float: left;
    width: 60%;
    margin-left: 5%;
    margin-top: 20px;
    background: #ffffff;
    padding: 20px;
    border-radius: 16px;
    box-shadow: 0 3px 15px rgba(0,0,0,0.08);
}

/* 책 소개 */
.book-box {
    display: flex;
    align-items: center;
    gap: 25px;
    margin-top: 20px;
}

/* 책 이미지 */
.book-img {
    width: 160px;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 3px 10px rgba(0,0,0,0.12);
}

/* 텍스트 영역 */
.book-text h1 {
    font-family: "NanumSquare", "Pretendard", sans-serif;
    font-size: 22px;
    margin: 0 0 10px 0;
    color: #1f2937;
    font-weight: 700;
}

.book-text p {
    font-family: "NanumSquare", "Pretendard", sans-serif;
    font-size: 18px;
    margin: 0;
    color: #4b5563;
}


article {
    background: #f9fafb;
    padding: 25px;
    border-radius: 14px;
    box-shadow: inset 0 0 6px rgba(0,0,0,0.05);
}

#right {
    float: right;
    width: 20%;
    margin-right: 5%;
    margin-top: 20px;
    background: #fff7ed;
    padding: 20px;
    border-radius: 16px;
    box-shadow: 0 3px 15px rgba(0,0,0,0.08);
}

#right video {
    width: 100%;
    border-radius: 10px;
}

footer {
    clear: both;
    width: 260px;
    margin: 50px auto;
    background: #ffffff;
    padding: 20px;
    text-align: center;
    border-radius: 16px;
    box-shadow: 0 3px 15px rgba(0,0,0,0.08);
}

footer audio {
    width: 100%;
}
@media (max-width: 900px) {
    section,
    #right {
        width: 90%;
        float: none;
        margin: 15px auto;
    }
}

.slider {
    width: 100%;
    overflow: hidden;
    position: relative;
}

.slider-inner {
    display: flex;
    transition: transform 0.6s ease-in-out;
}

.book-box {
    min-width: 100%;
    display: flex;
    align-items: center;
    gap: 25px;
    padding: 20px 0;
}

.book-img {
    width: 160px;
    border-radius: 12px;
    box-shadow: 0 3px 10px rgba(0,0,0,0.12);
}

.book-text h1 {
    font-family: "NanumSquare", "Pretendard", sans-serif;
    font-size: 22px;
    margin: 0 0 10px 0;
    font-weight: 700;
}

.book-text p {
    font-family: "NanumSquare", "Pretendard", sans-serif;
    font-size: 18px;
    margin: 0;
    color: #555;
}

/* 로그인 창 */

/* 로그인, 회원가입 공통 섹션 */
.login-section {
    display: flex;
    justify-content: center;
    margin-top: 40px;
}

.login-box {
    width: 350px;
    background: #fff8f1;
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.login-box h2 {
    text-align: center;
    margin-bottom: 20px;
    color: #5a3827;
}

.login-box form label {
    display: block;
    margin-top: 15px;
    font-weight: bold;
    color: #4b3a2f;
}

.login-box input {
    width: 100%;
    padding: 10px;
    margin-top: 5px;
    border: 1px solid #d7c9b8;
    border-radius: 8px;
    background: #fff;
}

.login-btn {
    width: 100%;
    padding: 10px;
    margin-top: 25px;
    border: none;
    background: #f2b892;
    color: #fff;
    border-radius: 10px;
    font-size: 16px;
    cursor: pointer;
    transition: 0.2s;
}

.login-btn:hover {
    background: #e8a278;
}

.link-text {
    margin-top: 15px;
    text-align: center;
}

.link-text a {
    color: #c26c2b;
    font-weight: bold;
}