@font-face {
    font-family: "Klavika-Regular";
    src: url("fonts/klavika-regular-webfont.woff2") format("woff2");
    font-weight: normal;
    font-style: normal;
}

@font-face {
    font-family: "Klavika-BoldCondensed";
    src: url("fonts/klavika-boldcond-webfont.woff2") format("woff2");
    font-weight: normal;
    font-style: normal;
}

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

html {
    scroll-padding-top: 112px;
    scroll-behavior: smooth;
}

body {
    font-family: Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
}

h1, h2, h3, h4, h5, h6 {
    font-family: "Klavika-Regular", sans-serif;
}

/* Navbar */
nav {
    background-color: #fff;
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
}

.logo {
    text-decoration: none;
    display: flex;
    align-items: center;
}

.logo img {
    height: 80px;
    width: auto;
}

.nav-items {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-items a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    font-size: 18px;
    text-transform: uppercase;
    transition: color 0.3s;
    font-weight: bold;
    font-family: "Klavika-Regular", sans-serif;
}

.nav-items a:hover {
    color: #E12A26;
}

/* Header */
header {
    padding: 1rem 2rem;
    background: white;
    color: #333;
    display: flex;
    justify-content: center;
}

.header-container {
    max-width: 1200px;
    display: flex;
    gap: 0;
    align-items: stretch;
    width: 100%;
}

.header-title-box {
    width: 300px;
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #e12a26;
    border-radius: 0;
    flex-shrink: 0;
}

.header-title-box h1 {
    font-size: 2rem;
    font-weight: 700;
    margin: 0;
    text-align: center;
    padding: 1rem;
    color: white;
    letter-spacing: 1px;
    font-family: "Klavika-BoldCondensed", sans-serif;
}

.header-image {
    flex: 1;
    border-radius: 0;
    overflow: hidden;
    height: 300px;
}

.header-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* Main Content */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    background-color: white;
}

.books-section h2 {
    font-size: 2.5rem;
    margin-top: 2rem;
    margin-bottom: 2rem;
    color: #2c3e50;
    text-align: center;
    font-family: "Klavika-Regular", sans-serif;
}
.books-section p {
    color: #555;
}

.ebooks-section {
    margin-top: 4rem;
}

.ebooks-section h2 {
    font-size: 2.5rem;
    margin-top: 2rem;
    margin-bottom: 2rem;
    color: #2c3e50;
    text-align: center;
    font-family: "Klavika-Regular", sans-serif;
}

.conference-section {
    margin-top: 4rem;
}

.conference-section h2 {
    font-size: 2.5rem;
    margin-top: 2rem;
    margin-bottom: 2rem;
    color: #2c3e50;
    text-align: center;
    font-family: "Klavika-Regular", sans-serif;
}

.out-of-print-section {
    margin-top: 4rem;
}

.out-of-print-section h2 {
    font-size: 2.5rem;
    margin-top: 2rem;
    margin-bottom: 2rem;
    color: #2c3e50;
    text-align: center;
    font-family: "Klavika-Regular", sans-serif;
}

.books-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-top: 2rem;
}

.book-card {
    background: white;
    padding: 0.5rem;
    border-bottom: 1px solid #e0e0e0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
}

.book-card:last-child {
    border-bottom: none;
}

.book-info {
    flex: 1;
}

.book-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 0.5rem;
    font-family: "Klavika-Regular", sans-serif;
}

.book-author {
    font-size: 1.1rem;
    color: #666;
    margin-top: 0.25rem;
    margin-bottom: 0;
    font-style: italic;
    display: block;
}

.book-price {
    font-size: 1.2rem;
    color: #E12A26;
    font-weight: bold;
    display: flex;
    align-items: center;
    margin: 0;
}

.book-links {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    flex-shrink: 0;
    align-items: center;
}

.book-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    background-color: transparent;
    color: #e12a26;
    text-decoration: none;
    border-radius: 4px;
    transition: opacity 0.3s;
}

.book-link:hover {
    opacity: 0.7;
}

.book-link img {
    width: 24px;
    height: 24px;
}

/* Footer */
footer {
    background-color: #333333;
    color: white;
    padding: 3rem 2rem;
    margin-top: 4rem;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.footer-section h3 {
    margin-bottom: 1rem;
    font-size: 1.2rem;
    font-family: "Klavika-Regular", sans-serif;
}

.footer-section p,
.footer-section a,
.footer-section li {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    line-height: 1.8;
}

.footer-section ul {
    list-style: none;
    padding-left: 0;
}

.footer-section li {
    margin-bottom: 0.5rem;
}

.footer-section a:hover {
    color: #E12A26;
    text-decoration: underline;
}

/* Responsive */
@media (min-width: 790px) and (max-width: 1100px) {
    html {
        scroll-padding-top: 157px;
    }

    .nav-container {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }

    .nav-items {
        gap: 1.5rem;
    }
}

@media (max-width: 789px) {
    html {
        scroll-padding-top: 0;
    }

    nav {
        position: static;
    }

    .header-container {
        flex-direction: column;
        align-items: center;
        gap: 0;
    }

    .header-title-box {
        width: 100%;
        max-width: 300px;
        height: 300px;
    }

    .header-image {
        width: 100%;
        max-width: 300px;
        height: 300px;
        flex: none;
    }

    .header-title-box h1 {
        font-size: 1.5rem;
    }

    .nav-container {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }

    .nav-items {
        flex-direction: column;
        gap: 0.5rem;
        font-size: 0.9rem;
        align-items: center;
    }

    .book-card {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .book-links {
        width: 100%;
        justify-content: flex-start;
    }
}