/* ── Reset ── */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* ── Base ── */
body {
    background-color: #C1C186;
    font-family: Georgia, 'Times New Roman', serif;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ── Header ── */
header {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1.5rem;
    padding: 1.5rem 1rem 0.5rem;
}

.side-turtles {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.logo-frame {
    border: 9px solid;
    border-color: #828244 #38381D #38381D #828244;
    background-image: url('../images/turtlelogo2.jpg');
    background-repeat: repeat;
    padding: 0.75rem 1rem 1.25rem;
    text-align: center;
}

.logo-frame img {
    display: block;
    max-width: 100%;
    height: auto;
}

/* ── Main content ── */
main {
    flex: 1;
    width: min(860px, 100%);
    margin: 1.5rem auto;
    padding: 0 1rem;
}

/* ── Home page card grid ── */
.card-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
    background: #C0C8B9;
    border: 5px solid;
    border-color: #8D946B #6A7050 #6A7050 #8D946B;
    padding: 1rem;
}

.card {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: #fff;
    padding: 0.75rem;
    text-decoration: none;
    color: inherit;
    border: 1px solid #8D946B;
    transition: background-color 0.15s;
}

.card:hover {
    background-color: #f0f0e0;
}

.card-thumb {
    flex-shrink: 0;
    width: 90px;
    height: 90px;
    object-fit: cover;
}

.card-body h2 {
    font-size: 1rem;
    color: #800000;
    margin-bottom: 0.3rem;
}

.card-body p {
    font-size: 0.85rem;
    color: #444;
    line-height: 1.4;
}

/* ── Footer ── */
footer {
    background-color: #B0B07A;
    border-top: 2px solid #6A7050;
    padding: 0.6rem 1rem;
    text-align: center;
    font-size: 0.8rem;
    color: #333;
}

/* ── Page title ── */
.page-title {
    text-align: center;
    color: #800000;
    font-size: 1.4rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #8D946B;
}

/* ── Photo gallery ── */
.photo-group {
    margin-bottom: 2rem;
}

.photo-group h2 {
    color: #800000;
    font-size: 1rem;
    font-weight: bold;
    margin-bottom: 0.6rem;
    padding: 0.35rem 0.75rem;
    background: #C0C8B9;
    border-left: 4px solid #6A7050;
}

.photo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 0.4rem;
}

.photo-grid a {
    display: block;
    aspect-ratio: 4/3;
    overflow: hidden;
    border: 2px solid #8D946B;
}

.photo-grid a:hover {
    border-color: #800000;
}

.photo-grid img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.2s ease;
}

.photo-grid a:hover img {
    transform: scale(1.05);
}

/* ── Collection category grid ── */
.collection-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.75rem;
    background: #C0C8B9;
    border: 5px solid;
    border-color: #8D946B #6A7050 #6A7050 #8D946B;
    padding: 1rem;
}

/* ── Category prev/next navigation ── */
.category-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #8D946B;
}

.category-nav .page-title {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
    flex: 1;
}

.cat-prev,
.cat-next {
    flex-shrink: 0;
    color: #800000;
    font-weight: bold;
    font-size: 0.9rem;
    text-decoration: none;
    white-space: nowrap;
}

.cat-prev:hover,
.cat-next:hover {
    text-decoration: underline;
}

/* ── Page navigation ── */
.page-nav {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.5rem 1.5rem;
    padding: 0.75rem 1rem;
    background: #C0C8B9;
    border-top: 2px solid #8D946B;
    font-size: 0.9rem;
}

.page-nav a {
    color: #800000;
    text-decoration: none;
    font-weight: bold;
}

.page-nav a:hover {
    text-decoration: underline;
}

/* ── Book list ── */
.book-notes {
    background: #C0C8B9;
    border-left: 4px solid #6A7050;
    padding: 0.6rem 1rem;
    font-size: 0.85rem;
    margin-bottom: 1rem;
    color: #333;
}

.book-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
    background: #fff;
}

.book-table thead th {
    background: #828244;
    color: #fff;
    padding: 0.5rem 0.75rem;
    text-align: left;
}

.book-table td {
    padding: 0.5rem 0.75rem;
    vertical-align: top;
    border-bottom: 1px solid #e0e0d0;
}

.col-cover {
    width: 76px;
}

.col-cover img {
    width: 60px;
    height: auto;
    display: block;
}

.col-title {
    width: 26%;
}

.book-oop {
    display: inline-block;
    font-size: 0.7rem;
    background: #6A7050;
    color: #fff;
    padding: 0.1rem 0.35rem;
    border-radius: 2px;
    margin-bottom: 0.2rem;
    letter-spacing: 0.04em;
    vertical-align: middle;
}

.col-title a {
    color: #800000;
    font-weight: bold;
    text-decoration: none;
}

.col-title a:hover {
    text-decoration: underline;
}

.book-author {
    color: #555;
    margin-top: 0.2rem;
}

/* ── Responsive ── */
@media (max-width: 580px) {
    .side-turtles {
        display: none;
    }

    .card-grid {
        grid-template-columns: 1fr;
    }

    .col-desc {
        display: none;
    }

    .collection-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}