body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: #f8f8f8;
}

.produk-section, 
.container {
    background: #fff;
}

.produk-header {
    font-size: 24px;
    color: #fff;
    background-color: #e52024;
    display: inline-block;
    padding: 10px 30px 10px 20px;
    clip-path: polygon(0 0, 90% 0, 100% 50%, 90% 100%, 0 100%);
    margin-bottom: 20px;
}

.produk-list {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
}

.produk-item {
    background: #fff;
    padding: 20px;
    text-align: left;
    width: 360px;
}

.produk-image {
    width: 100%;
    height: 520px;
    margin-bottom: 10px;
}

.produk-title {
    font-size: 16px;
    margin-bottom: 10px;
    color: #333;
    height: 40px;
}

.produk-price {
    font-weight: bold;
    margin-bottom: 10px;
    background-color: #6e6f6f;
    color: #fff;
    display: inline-block;
    padding: 10px 10px;
    font-size: 23px;
}

.produk-button {
    background-color: #6e6f6f;
    color: white;
    border: none;
    padding: 15px 20px;
    cursor: pointer;
    width: 100%;
    font-size: 23px;
}
@media (max-width: 352px) {
    .produk-title {
      margin-bottom: 20px;
    }
}

@media (max-width: 849px) {
    .produk-list {
      gap: 10px;
    }
}


/* detail */
.produk-header-detail {
    font-size: 24px;
    background-color: #e9eaea;
    display: inline-block;
    padding: 10px 30px 10px 20px;
    clip-path: polygon(0 0, 90% 0, 100% 50%, 90% 100%, 0 100%);
    margin-bottom: 20px;
    width: 100px;
}

.content {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    margin-top: 10px;
    padding: 0px 90px 0 90px;
}
.left {
    flex: 1;
    text-align: center;
    width: 50%;
}
.left img {
    width: 50%;
    height: auto;
    margin-bottom: 10px;
    text-align: center;
}
.right {
    flex: 2;
    min-width: 300px;
    margin-left: 40px;
}

.tab-button {
    background-color: #ddd;
    border: none;
    padding: 10px 20px;
    cursor: pointer;
    margin-right: 5px;
    font-weight: bold;
}
.tab-abstract, .tab-specs  {
    display: inline-block;
    width: 150px;
    padding: 10px;
    background-color: #6e6f6f;
    text-align: center;
    border-radius: 4px; 
    color: white;
    margin-bottom: 10px;
}

#abstract{
    padding-bottom: 20px;
    text-align: justify;
}

.tab-content {
    min-height: 100px;
    margin-bottom: 20px;
}
.download-button {
    display: block;
    width: 100%;
    background-color: #e53935;
    color: white;
    border: none;
    padding: 10px 0;
    font-size: 18px;
    cursor: pointer;
    margin: 20px 0px 20px 0px;
}

#book-image{
    width: 100%;
}

.footer {
    background: #e9eaea;
    display: flex;
    justify-content: flex-end;
    align-items: center;
}   
.back-button {
    font-size: 24px;
    color: #fff;
    background-color: #e52024;
    display: inline-block;
    padding: 10px 30px 10px 40px;
    clip-path: polygon(10% 0, 100% 0, 100% 100%, 10% 100%, 0% 50%);
    border: none;
}