/* ============================================
   CAROUSEL COMPONENT - REFACTORED
   ============================================ */

/* 1. CONFIGURATION (CSS VARIABLES) */
:root {
    /* Colors */
    --c-primary: #007bff;
    --c-primary-dark: #0056b3;
    --c-accent-light: #ADE8F4;
    --c-text-dark: #03045E;
    --c-border: #e2e8f0;

    /* Effects */
    --shadow-sm: 0 4px 15px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 20px 60px rgba(0, 123, 255, 0.2);
    --ease-smooth: cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --radius-main: 16px;

    /* Dimensions (Responsive Defaults) */
    --card-width: 250px;
    --card-img-h: 300px;
    --nav-size: 50px;
    --nav-font: 20px;
    --container-pad: 30px;
}

/* 2. LAYOUT & CONTAINER */
.related-books {
    background: white;
    padding: var(--container-pad);
    border-radius: var(--radius-main);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    margin: 40px 0;
    overflow: visible !important;
}

.related-books h3 {
    color: var(--c-text-dark);
    font-weight: 700;
    font-size: 28px;
    
    position: relative;
}

.related-books h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    inset-inline-start: 0;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-secondary), var(--c-accent-light));
    border-radius: 2px;
}

.carousel-container {
    margin-left: calc(-1 * var(--container-pad));
    margin-right: calc(-1 * var(--container-pad));
    position: relative;
    padding: 20px 0;
    z-index: var(--z-base);
}

.carousel-wrapper {
    padding-left: var(--container-pad);
    padding-right: var(--container-pad);
    display: flex;
    gap: 20px;
    padding: 20px 0px;
    overflow-x: auto;
    scroll-behavior: smooth;
    scrollbar-width: none;
    -ms-overflow-style: none;
    transition: transform 0.4s var(--ease-smooth);
    scroll-snap-type: x mandatory;
    padding-top: 20px;
    padding-bottom: 20px;
}

/* 3. BOOK CARD - Carousel-specific overrides (base styles in book-card.css) */
.carousel-wrapper .book-card {
    flex: 0 0 var(--card-width);
    display: flex;
    flex-direction: column;
}

.carousel-wrapper .book-card img.card-img-top {
    height: var(--card-img-h);
}

.carousel-wrapper .book-card .price-section {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.carousel-wrapper .book-card .price-section>div {
    width: 100%;
    text-align: center;
}

.carousel-wrapper .book-card .book-author {
    justify-content: center;
    min-height: 20px;
}

/* 4. NAVIGATION CONTROLS */
.carousel-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 5;
    width: var(--nav-size);
    height: var(--nav-size);
    font-size: var(--nav-font);
    border-radius: var(--radius-circle);
    border: none;
    background: white;
    color: var(--c-primary);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-base);
}

.carousel-nav.prev {
    inset-inline-start: -25px;
}

.carousel-nav.next {
    inset-inline-end: -25px;
}

[dir="rtl"] .carousel-nav.prev {
    right: 10px;
    left: auto;
}

[dir="rtl"] .carousel-nav.next {
    left: 10px;
    right: auto;
}

.carousel-nav:hover:not(:disabled) {
    background: var(--c-primary);
    color: white;
    transform: translateY(-50%) scale(1.1);
    box-shadow: 0 6px 20px rgba(0, 123, 255, 0.3);
}

.carousel-nav:disabled {
    opacity: 0.3;
    cursor: not-allowed;
    background: var(--color-bg-light);
}

/* Indicators */
.carousel-indicators {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 25px;
    padding: 0 20px;
}

.indicator {
    width: 10px;
    height: 10px;
    border-radius: var(--radius-circle);
    border: none;
    background: var(--c-border);
    cursor: pointer;
    transition: var(--transition-base);
}

.indicator.active,
.indicator:hover {
    background: var(--c-primary);
    transform: scale(1.2);
}
/* Quick actions, action-btn, card-badges: moved to book-card.css */
/* 5. UTILITIES & ANIMATIONS */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 200px;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top-color: var(--c-primary);
    border-radius: var(--radius-circle);
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

@keyframes addSuccess {
    50% {
        transform: scale(1.2);
    }
}

.add-success {
    animation: addSuccess 0.3s ease;
}

/* Empty State */
.empty-state-card {
    min-height: 300px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    border: 2px dashed var(--c-border);
    background-color: var(--color-bg-light);
    transition: transform 0.3s ease;
}

.empty-state-icon {
    animation: float 3s ease-in-out infinite;
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

/* 6. RESPONSIVE DESIGN (Consolidated) */

/* Large Tablets */
@media (max-width: 1200px) {
    :root {
        --card-width: 220px;
    }
}

/* Tablets */
@media (max-width: 1024px) {
    :root {
        --card-width: 200px;
        --card-img-h: 240px;
        --container-pad: 25px;
    }

    .carousel-nav {
        width: 45px;
        height: 45px;
        font-size: 18px;
    }
}

/* Small Tablets / Large Mobile */
@media (max-width: 768px) {
    :root {
        --card-width: 160px;
        --card-img-h: 200px;
        --container-pad: 5vw;
        --nav-size: 40px;
    }

    .related-books {
        margin: 5vw 0;
        padding: 20px;
        border-radius: var(--radius-md);
    }

    .related-books h3 {
        font-size: 22px;
    }

    .carousel-wrapper {
        gap: 12px;
        padding-top: 12px;
        padding-bottom: 12px;
    }

    .carousel-wrapper .book-card {
        border-radius: var(--radius-md);
    }

    .carousel-wrapper .book-card h6 {
        font-size: 13px;
        height: 36px;
        margin-top: 8px;
        margin-bottom: 4px;
        line-height: 1.3;
    }

    .carousel-wrapper .book-card .book-author {
        font-size: 11px;
        margin-bottom: 8px;
        min-height: 16px;
    }

    /* Hide author nationality on mobile */
    .carousel-wrapper .book-card .book-author small {
        display: none;
    }

    .carousel-nav.prev {
        inset-inline-start: -10px;
    }

    .carousel-nav.next {
        inset-inline-end: -10px;
    }
}

/* Mobile */
@media (max-width: 600px) {
    :root {
        --card-width: 145px;
        --card-img-h: 180px;
        --container-pad: 4vw;
        --nav-size: 36px;
    }

    .related-books {
        margin: 4vw 0;
        padding: 15px;
    }

    .related-books h3 {
        font-size: 20px;
        margin-bottom: 8px;
    }

    .related-books h3::after {
        width: 40px;
        height: 3px;
    }

    .carousel-wrapper {
        gap: 10px;
        padding-top: 10px;
        padding-bottom: 10px;
    }

    .carousel-wrapper .book-card {
        border-radius: 10px;
    }

    .carousel-wrapper .book-card h6 {
        font-size: 12px;
        height: 32px;
        margin-top: 6px;
        margin-bottom: 3px;
        padding-left: 8px;
        padding-right: 8px;
    }

    .carousel-wrapper .book-card .book-author {
        font-size: 10px;
        margin-bottom: 6px;
        padding-left: 8px;
        padding-right: 8px;
    }

    .carousel-wrapper .book-card .book-author i {
        display: none;
    }

    .carousel-wrapper .book-card .price-section {
        padding: 6px 8px 10px;
        gap: 4px;
    }

    .carousel-wrapper .book-card .price {
        font-size: 14px;
    }

    .carousel-wrapper .book-card .original-price {
        font-size: 11px;
    }

    .carousel-wrapper .book-card .add-btn {
        width: 100%;
        height: 34px;
        padding: 0;
        gap: 0;
        border-radius: var(--radius-sm);
        margin-top: 4px;
        font-size: 0.8rem;
    }

    .carousel-wrapper .book-card .add-btn span {
        display: none;
    }

    .carousel-wrapper .book-card .add-btn i {
        font-size: 1rem;
    }

    .carousel-wrapper .book-card .notify-btn {
        padding: 6px 4px;
        font-size: 0.7rem;
        border-radius: var(--radius-sm);
        margin-top: 4px;
        gap: 3px;
    }

    .carousel-nav {
        font-size: 14px;
    }

    .carousel-nav.prev {
        inset-inline-start: -5px;
    }

    .carousel-nav.next {
        inset-inline-end: -5px;
    }
}

/* Tiny Screens */
@media (max-width: 400px) {
    :root {
        --card-width: 130px;
        --card-img-h: 155px;
        --container-pad: 3vw;
        --nav-size: 32px;
    }

    .related-books {
        padding: 12px;
    }

    .related-books h3 {
        font-size: 18px;
    }

    .carousel-wrapper {
        gap: 8px;
    }

    .carousel-wrapper .book-card h6 {
        font-size: 11px;
        height: 28px;
    }

    .carousel-wrapper .book-card .book-author {
        font-size: 9.5px;
        margin-bottom: 4px;
    }

    .carousel-wrapper .book-card .price {
        font-size: 13px;
    }

    .carousel-wrapper .book-card .original-price {
        font-size: 10px;
    }

    .carousel-wrapper .book-card .price-section {
        padding: 5px 6px 8px;
        gap: 3px;
    }

    .carousel-wrapper .book-card .add-btn {
        height: 30px;
    }

    .carousel-wrapper .book-card .notify-btn {
        font-size: 0.65rem;
        padding: 5px 3px;
    }

    .carousel-nav {
        font-size: 12px;
    }
}