:root {
    --text-color: #333;
    --bg-color: #fcfcfc;
    --accent-color: #d1b17a;
    --link-color: #a07a3f;
    --link-hover-color: #8c6b36;
    --border-color: #eee;
    --muted-color: #888;
    --font-serif: 'Merriweather', Georgia, serif;
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
}

/* ---- Base ---- */

*, *::before, *::after {
    box-sizing: border-box;
}

body {
    font-family: var(--font-serif);
    color: var(--text-color);
    background-color: var(--bg-color);
    line-height: 1.7;
    margin: 0;
    padding: 0;
}

a {
    color: var(--link-color);
    text-decoration: none;
}

a:hover {
    color: var(--link-hover-color);
    text-decoration: underline;
}

/* ---- Hero / Logo ---- */

.hero {
    text-align: center;
    padding: 3rem 0 1rem;
}

.hero .logo {
    max-width: 180px;
    height: auto;
}

/* ---- Language Selector ---- */

.lang-selector {
    display: flex;
    direction: ltr;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.4rem;
    max-width: 1100px;
    margin: 0 auto 1rem;
    padding: 0 2rem;
}

.lang-pill {
    position: relative;
    font-family: var(--font-sans);
    font-size: 0.75rem;
    padding: 0.3rem 0.8rem;
    border: 1px solid var(--border-color);
    border-radius: 2rem;
    color: var(--text-color);
    text-decoration: none;
    transition: border-color 0.15s, background-color 0.15s, color 0.15s;
}

.lang-sizer {
    visibility: hidden;
    display: block;
    height: 0;
    overflow: hidden;
    white-space: nowrap;
    line-height: 1;
}

.lang-label {
    display: block;
    white-space: nowrap;
    text-align: center;
}

.lang-pill:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
    text-decoration: none;
}

.lang-pill-active {
    background: var(--accent-color);
    border-color: var(--accent-color);
    color: #fff;
}

.lang-pill-active:hover {
    background: var(--link-hover-color);
    border-color: var(--link-hover-color);
    color: #fff;
}

/* ---- Book Grid ---- */

.book-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 2.5rem 2rem;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem 4rem;
}

/* ---- Book Card ---- */

.book-card {
    position: relative;
    border: 1px solid transparent;
    border-radius: 6px;
    padding: 8px 8px 4px;
    transition: border-color 0.3s ease, background-color 0.3s ease;
}

.book-card:hover {
    border-color: var(--accent-color);
    background-color: rgba(255, 255, 255, 0.95);
}

.book-cover-link {
    display: block;
    text-decoration: none;
    color: inherit;
}

.book-cover-link:hover {
    text-decoration: none;
    color: inherit;
}

.book-cover-wrapper {
    position: relative;
    aspect-ratio: 5 / 8;
    border-radius: 12px;
    overflow: hidden;
    background: #f0ebe0;
}

.book-cover {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

.book-cover-placeholder {
    width: 100%;
    aspect-ratio: 5 / 8;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    text-align: center;
    font-family: var(--font-serif);
    font-size: 0.9rem;
    color: var(--muted-color);
    background: #f0ebe0;
}

.book-info {
    padding: 0.6rem 0;
}

.book-title {
    font-size: 0.95rem;
    font-weight: 400;
    margin: 0 0 0.2rem;
    line-height: 1.3;
}

.book-title a {
    color: #111;
    text-decoration: none;
}

.book-title a:hover {
    color: var(--link-color);
}

.book-author {
    font-family: var(--font-sans);
    font-size: 0.8rem;
    margin: 0 0 0.4rem;
}

.book-author a {
    color: var(--muted-color);
    text-decoration: none;
}

.book-author a:hover {
    color: var(--link-color);
    text-decoration: underline;
}

/* ---- Format Badges ---- */

.format-badges {
    display: flex;
    justify-content: flex-end;
    gap: 0.35rem;
    flex-wrap: wrap;
}

.badge {
    font-family: var(--font-sans);
    font-size: 0.65rem;
    font-weight: 500;
    padding: 0.15rem 0.35rem 0.15rem 0.55rem;
    border-radius: 2rem;
    border: 1px solid var(--accent-color);
    color: var(--link-color);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    white-space: nowrap;
    direction: ltr;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.3rem;
    flex: 1;
}

/* Clickable badge (whole badge is add-to-cart) */
.badge-clickable {
    cursor: pointer;
    transition: background-color 0.15s, border-color 0.15s, color 0.15s;
}

.badge-clickable:hover {
    background: var(--accent-color);
    color: #fff;
    border-color: var(--accent-color);
}

/* Detail page badge */
.badge-detail {
    padding: 0.2rem 0.55rem;
    font-size: 0.75rem;
}

.badge-cart-label {
    margin-left: auto;
    padding-left: 0.4rem;
    border-left: 1px solid var(--accent-color);
}

.badge-clickable:hover .badge-cart-label {
    border-left-color: rgba(255,255,255,0.4);
}

.badge-clickable:hover .isbn {
    color: rgba(255,255,255,0.7);
}

.badge-plus {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent-color);
    color: #fff;
    font-size: 0.7rem;
    font-weight: 700;
    line-height: 1;
}

.badge-clickable:hover .badge-plus {
    background: #fff;
    color: var(--accent-color);
}

/* ---- Hover Overlay ----
   Fades in around the book cover with slight padding on left/top/bottom
   and ample padding on the right containing the description.
*/

.book-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 4px;
    padding: 12px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    z-index: 10;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.book-card:hover .book-overlay {
    opacity: 1;
    pointer-events: auto;
}

.book-overlay-inner {
    flex: 1;
    overflow-y: auto;
}

.book-overlay-inner p {
    font-family: var(--font-sans);
    font-size: 0.82rem;
    line-height: 1.55;
    color: var(--text-color);
    margin: 0 0 0.75rem;
}


/* ---- Detail Page ---- */

.detail-page {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 2rem 4rem;
}

.back-link {
    display: inline-block;
    margin: 1.5rem 0;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    color: var(--link-color);
    text-decoration: none;
}

.back-link:hover {
    color: var(--link-hover-color);
    text-decoration: underline;
}

.detail-layout {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 3rem;
    align-items: start;
}

.detail-cover img {
    width: 100%;
    border-radius: 16px;
}

.detail-placeholder {
    aspect-ratio: 2 / 3;
    border-radius: 16px;
}

.detail-info h1 {
    font-size: 1.8rem;
    font-weight: 400;
    color: #111;
    margin: 0 0 0.5rem;
    line-height: 1.3;
}

.detail-author {
    font-family: var(--font-sans);
    font-size: 1rem;
    margin: 0 0 1rem;
}

.detail-author a {
    color: var(--muted-color);
    text-decoration: none;
}

.detail-author a:hover {
    color: var(--link-color);
    text-decoration: underline;
}

.detail-badges {
    margin-top: 1.5rem;
    margin-bottom: 1.5rem;
}

.other-editions h3 {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--muted-color);
    margin-bottom: 0.5rem;
}

.edition-links {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
}

.edition-link {
    font-family: var(--font-sans);
    font-size: 0.7rem;
    padding: 0.2rem 0.6rem;
    border: 1px solid var(--border-color);
    border-radius: 2rem;
    color: var(--link-color);
    text-decoration: none;
    transition: border-color 0.15s, background-color 0.15s, color 0.15s;
}

.edition-link:hover {
    border-color: var(--accent-color);
    background: var(--accent-color);
    color: #fff;
    text-decoration: none;
}

.detail-badges .badge {
    font-size: 0.75rem;
    padding: 0.2rem 0.7rem;
}

.detail-badges .isbn {
    font-size: 0.7rem;
    color: var(--muted-color);
    margin-left: 0.4rem;
}

.detail-description {
    font-size: 1rem;
    line-height: 1.8;
    white-space: pre-line;
}

/* ---- Author Page ---- */

.author-book-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.author-book-item {
    display: flex;
    gap: 1.5rem;
    align-items: start;
    text-decoration: none;
    color: inherit;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    transition: border-color 0.2s, background-color 0.2s;
}

.author-book-item:hover {
    border-color: var(--accent-color);
    background-color: #faf6ee;
    text-decoration: none;
}

.author-book-cover {
    width: 100px;
    flex-shrink: 0;
}

.author-book-cover img {
    width: 100%;
    border-radius: 3px;
}

.author-book-info h3 {
    font-size: 1.1rem;
    font-weight: 400;
    color: #111;
    margin: 0 0 0.5rem;
}

.author-book-info p {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    color: #555;
    line-height: 1.5;
    margin: 0;
}

/* ---- Cart Toggle Button ---- */

.cart-toggle {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 300;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: #fff;
    color: var(--text-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    transition: border-color 0.15s, box-shadow 0.15s;
}

.cart-toggle:hover {
    border-color: var(--accent-color);
    box-shadow: 0 2px 12px rgba(0,0,0,0.12);
}

.cart-count {
    position: absolute;
    top: -4px;
    right: -4px;
    background: var(--accent-color);
    color: #fff;
    font-family: var(--font-sans);
    font-size: 0.65rem;
    font-weight: 700;
    min-width: 18px;
    height: 18px;
    line-height: 18px;
    text-align: center;
    border-radius: 9px;
    padding: 0 4px;
}

/* ---- Cart Sidebar ---- */

.cart-sidebar {
    position: fixed;
    top: 0;
    right: 0;
    width: 340px;
    height: 100vh;
    background: #fff;
    border-left: 1px solid var(--border-color);
    box-shadow: -4px 0 16px rgba(0,0,0,0.08);
    z-index: 400;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.cart-sidebar.open {
    transform: translateX(0);
}

.cart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.2rem;
    border-bottom: 1px solid var(--border-color);
}


.cart-header h3 {
    margin: 0;
    font-family: var(--font-sans);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-weight: 600;
    color: var(--text-color);
}

.cart-close {
    all: unset;
    cursor: pointer;
    font-size: 1.4rem;
    color: var(--muted-color);
    line-height: 1;
    padding: 0 0.2rem;
}

.cart-close:hover {
    color: var(--text-color);
}

.cart-body {
    flex: 1;
    overflow-y: auto;
    padding: 1rem 1.2rem;
}

.cart-empty {
    font-family: var(--font-sans);
    font-size: 0.9rem;
    color: var(--muted-color);
    font-style: italic;
}

.cart-item {
    display: grid;
    grid-template-columns: 35px 1fr;
    grid-template-rows: auto auto;
    column-gap: 0.5rem;
    row-gap: 0.25rem;
    padding: 0.8rem 0;
    border-bottom: 1px solid var(--border-color);
}

.cart-item:last-of-type {
    border-bottom: none;
}

.cart-item-thumb {
    width: 35px;
    border-radius: 3px;
    display: block;
    grid-row: 1 / 3;
}

.cart-item-thumb-placeholder {
    width: 35px;
    height: 56px;
    background: #f0ebe0;
    border-radius: 3px;
    grid-row: 1 / 3;
}

.cart-item-info {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.cart-item-title {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-color);
    text-decoration: none;
}

.cart-item-title:hover {
    color: var(--link-color);
}

.cart-item-author {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    color: var(--muted-color);
}

.cart-item-format {
    font-family: var(--font-sans);
    font-size: 0.7rem;
    color: var(--muted-color);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.cart-item-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    min-width: 0;
    grid-column: 1 / -1;
}

.cart-qty-btn {
    all: unset;
    cursor: pointer;
    width: 24px;
    min-width: 24px;
    height: 24px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-sans);
    font-size: 0.8rem;
    color: var(--text-color);
    background: var(--bg-color);
    transition: border-color 0.15s;
}

.cart-qty-btn:hover {
    border-color: var(--accent-color);
}

.cart-item-qty {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    min-width: 1.2rem;
    text-align: center;
}

.cart-item-price {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-color);
    margin-left: auto;
}

.cart-qty-trash {
    color: var(--muted-color);
}

.cart-qty-trash:hover {
    color: #c44;
    border-color: #c44;
}

.cart-total {
    padding: 1rem 0 0.5rem;
    border-top: 2px solid var(--accent-color);
    margin-top: 0.5rem;
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-color);
    text-align: right;
}


/* Cart footer / checkout */
.cart-footer {
    padding: 0.8rem 1.2rem;
    border-top: 1px solid var(--border-color);
}

.cart-checkout-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    padding: 0.7rem;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #fff;
    background: var(--link-color);
    border: none;
    border-radius: 6px;
    text-decoration: none;
    transition: background-color 0.15s;
}

.cart-checkout-btn:hover {
    background: var(--link-hover-color);
    color: #fff;
    text-decoration: none;
}

/* ---- Checkout Page ---- */

.checkout-subtitle {
    font-family: var(--font-sans);
    font-size: 0.95rem;
    color: var(--muted-color);
    margin-bottom: 2rem;
}

.checkout-table {
    width: 100%;
    border-collapse: collapse;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    margin-bottom: 2rem;
}

.checkout-table th {
    text-align: left;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--muted-color);
    border-bottom: 2px solid var(--accent-color);
    padding: 0.5rem 0.75rem;
}

.checkout-table tbody tr {
    border-bottom: 1px solid var(--border-color);
}

.checkout-table td {
    padding: 0.75rem;
    vertical-align: middle;
}

.checkout-table th:nth-child(3),
.checkout-table th:nth-child(4),
.checkout-table th:nth-child(5),
.checkout-table td:nth-child(3),
.checkout-table td:nth-child(4),
.checkout-table td:nth-child(5) {
    text-align: center;
}

.checkout-table a {
    color: var(--link-color);
    text-decoration: none;
    font-weight: 500;
}

.checkout-table a:hover {
    text-decoration: underline;
}

.checkout-author {
    font-size: 0.8rem;
    color: var(--muted-color);
}

.checkout-table tfoot tr {
    border-bottom: none;
}

.checkout-table tfoot td {
    border-top: 2px solid var(--accent-color);
    font-weight: 600;
    font-size: 1rem;
}

.checkout-note {
    font-family: var(--font-sans);
    font-size: 0.9rem;
    color: #555;
    line-height: 1.6;
    padding: 1.5rem;
    background: #faf6ee;
    border: 1px solid var(--accent-color);
    border-radius: 6px;
}

/* Cart page */
.cart-page-qty {
    white-space: nowrap;
}

.cart-page-qty .cart-qty-btn,
.cart-page-qty span {
    vertical-align: middle;
    margin: 0 0.15rem;
}

.cart-page-thumb-cell {
    width: 50px;
    padding-right: 0;
}

.cart-page-thumb {
    width: 50px;
    border-radius: 4px;
    display: block;
}

.cart-page-thumb-placeholder {
    width: 50px;
    height: 80px;
    background: #f0ebe0;
    border-radius: 4px;
}

.cart-page-save,
.cart-page-remove,
.saved-move-to-cart,
.saved-remove {
    all: unset;
    cursor: pointer;
    font-family: var(--font-sans);
    font-size: 0.65rem;
    color: var(--text-color);
    padding: 0.25rem 0.6rem;
    border-radius: 2rem;
    border: 1px solid var(--border-color);
    background: var(--bg-color);
    transition: border-color 0.15s, background-color 0.15s, color 0.15s;
    margin-left: 0.25rem;
}

.cart-page-save:hover,
.cart-page-remove:hover,
.saved-move-to-cart:hover,
.saved-remove:hover {
    border-color: var(--accent-color);
    background: var(--accent-color);
    color: #fff;
}

.saved-heading {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-weight: 600;
    color: var(--muted-color);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
    margin-top: 3rem;
    margin-bottom: 1rem;
}

.cart-page-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 2rem;
}

/* ---- Responsive ---- */

@media (max-width: 768px) {
    .book-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem 1rem;
        padding: 0 1rem 3rem;
    }

    .hero {
        padding: 2rem 0 1.5rem;
    }

    .hero .logo {
        max-width: 140px;
    }

    .detail-layout {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .detail-cover img {
        max-width: 250px;
    }
}

@media (max-width: 480px) {
    .book-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem 0.75rem;
        padding: 0 0.75rem 2rem;
    }

    .cart-sidebar {
        width: 100%;
    }
}