@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Playfair+Display:ital,wght@0,500;0,700;1,400&display=swap');

:root {
    --bg-dark: #080b11;
    --bg-card: rgba(17, 24, 39, 0.7);
    --border-color: rgba(255, 255, 255, 0.08);
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --primary-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --accent-gradient: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    --danger-gradient: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    --font-sans: 'Inter', sans-serif;
    --font-serif: 'Playfair Display', serif;
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --glow-shadow: 0 0 20px rgba(99, 102, 241, 0.15);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-sans);
    min-height: 100vh;
    overflow-x: hidden;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(139, 92, 246, 0.05) 0%, transparent 40%);
    background-attachment: fixed;
}

/* 4K Kristal Sayfa Netleştirme & Kontrast Filtreleri */
.page img, #flipbook img, canvas.pdf-canvas {
    image-rendering: -webkit-optimize-contrast !important;
    image-rendering: crisp-edges !important;
    filter: contrast(1.15) brightness(1.02) sharpness(1.1) !important;
    backface-visibility: hidden;
    transform: translateZ(0);
}

/* Header & Navigation */
header {
    background: rgba(8, 11, 17, 0.75);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.25rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-serif);
    font-size: 1.75rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-decoration: none;
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo span {
    font-family: var(--font-sans);
    font-size: 0.8rem;
    font-weight: 600;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    border: 1px solid rgba(245, 158, 11, 0.3);
    padding: 0.2rem 0.5rem;
    border-radius: 9999px;
    text-transform: uppercase;
}

/* Main Layout Container */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

/* Search Box Area */
.search-section {
    text-align: center;
    margin-bottom: 3.5rem;
    position: relative;
}

.search-section h1 {
    font-family: var(--font-serif);
    font-size: 2.75rem;
    margin-bottom: 1rem;
    font-weight: 700;
    letter-spacing: -1px;
}

.search-section p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto 2rem;
}

.search-wrapper {
    position: relative;
    max-width: 650px;
    margin: 0 auto;
}

.search-input {
    width: 100%;
    padding: 1.15rem 1.5rem 1.15rem 3.5rem;
    font-size: 1.1rem;
    color: var(--text-primary);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 9999px;
    outline: none;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    transition: var(--transition-smooth);
}

.search-input:focus {
    border-color: #6366f1;
    box-shadow: var(--glow-shadow), 0 10px 30px rgba(0, 0, 0, 0.3);
    background: rgba(17, 24, 39, 0.9);
}

.search-icon {
    position: absolute;
    left: 1.5rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    pointer-events: none;
    font-size: 1.25rem;
}

/* Sections & Grid Layouts */
.section-title {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
}

.section-title::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-color);
}

.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 3.5rem;
}

/* Loading Spinner & Status messages */
.loading-wrapper {
    display: none;
    grid-column: 1 / -1;
    text-align: center;
    padding: 3rem 0;
}

.spinner {
    width: 45px;
    height: 45px;
    border: 3.5px solid rgba(99, 102, 241, 0.1);
    border-radius: 50%;
    border-top-color: #6366f1;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.status-message {
    grid-column: 1 / -1;
    text-align: center;
    padding: 3rem 2rem;
    color: var(--text-secondary);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    backdrop-filter: blur(8px);
}

/* Book Card */
.book-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    height: 100%;
    cursor: pointer;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.book-card:hover {
    transform: translateY(-8px);
    border-color: rgba(99, 102, 241, 0.4);
    box-shadow: var(--glow-shadow);
}

.book-cover-container {
    position: relative;
    aspect-ratio: 2 / 3;
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 1rem;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.book-cover {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-smooth);
}

.book-card:hover .book-cover {
    transform: scale(1.05);
}

/* Generic Cover Design */
.generic-cover {
    position: absolute;
    inset: 0;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    text-align: center;
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    color: #ffffff;
}

.generic-cover.c1 { background: linear-gradient(135deg, #4f46e5 0%, #312e81 100%); }
.generic-cover.c2 { background: linear-gradient(135deg, #10b981 0%, #064e3b 100%); }
.generic-cover.c3 { background: linear-gradient(135deg, #f59e0b 0%, #78350f 100%); }
.generic-cover.c4 { background: linear-gradient(135deg, #ec4899 0%, #701a75 100%); }

.generic-cover-title {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 700;
    line-height: 1.3;
    margin-top: 2rem;
}

.generic-cover-author {
    font-size: 0.8rem;
    opacity: 0.8;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.book-info {
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.book-title {
    font-size: 1rem;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 0.4rem;
    color: var(--text-primary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    height: 2.8rem;
}

.book-author {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.progress-bar-container {
    margin-top: auto;
    background: rgba(255, 255, 255, 0.05);
    height: 6px;
    border-radius: 9999px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: var(--primary-gradient);
    border-radius: 9999px;
    width: 0%;
    transition: var(--transition-smooth);
}

.progress-text {
    font-size: 0.75rem;
    color: var(--text-secondary);
    display: flex;
    justify-content: space-between;
    margin-top: 0.25rem;
}

/* Full Screen Reader View Modal */
.reader-modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    background-color: var(--bg-dark);
    display: none;
    flex-direction: column;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.reader-modal.active {
    display: flex;
    opacity: 1;
}

/* Reader Top Toolbar */
.reader-header {
    background: rgba(17, 24, 39, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.reader-left {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    max-width: 40%;
}

.btn-icon {
    background: transparent;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 1.25rem;
    padding: 0.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-smooth);
}

.btn-icon:hover {
    background: rgba(255, 255, 255, 0.08);
    color: #8b5cf6;
}

.reader-book-title {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.reader-center {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.page-input-wrapper {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.2rem 0.5rem;
}

.page-input {
    width: 40px;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 0.95rem;
    text-align: center;
    font-weight: 600;
    outline: none;
}

.reader-right {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Reader Search Drawer */
.search-drawer {
    background: rgba(17, 24, 39, 0.98);
    border-bottom: 1px solid var(--border-color);
    padding: 0.75rem 1.5rem;
    display: none;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.search-drawer.active {
    display: flex;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from { transform: translateY(-10px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.drawer-search-wrapper {
    position: relative;
    flex-grow: 1;
    max-width: 400px;
}

.drawer-search-input {
    width: 100%;
    padding: 0.5rem 1rem 0.5rem 2.2rem;
    font-size: 0.9rem;
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    outline: none;
}

.drawer-search-input:focus {
    border-color: #6366f1;
}

.search-results-indicator {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.search-nav-btn {
    padding: 0.4rem 0.8rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: var(--transition-smooth);
}

.search-nav-btn:hover:not(:disabled) {
    background: #6366f1;
}

.search-nav-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.reader-body {
    flex-grow: 1;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1.5rem 1rem;
    position: relative;
    height: calc(100vh - 65px);
}

.reader-body::-webkit-scrollbar {
    width: 6px;
}

.reader-body::-webkit-scrollbar-thumb {
    background: rgba(99, 102, 241, 0.3);
    border-radius: 99px;
}

.canvas-container {
    position: relative;
    box-shadow: 0 15px 45px rgba(0, 0, 0, 0.5);
    border-radius: 8px;
    overflow: hidden;
    background: #ffffff;
    max-width: 100%;
}

canvas, .page img {
    display: block;
    max-width: 100%;
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
    transform: translateZ(0);
    backface-visibility: hidden;
}

/* Floating Navigation */
.floating-nav {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 1rem;
    background: rgba(17, 24, 39, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: 9999px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    z-index: 1005;
}

.floating-nav button {
    background: transparent;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 1.1rem;
    padding: 0.6rem 1rem;
    border-radius: 9999px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition-smooth);
}

.floating-nav button:hover:not(:disabled) {
    background: #6366f1;
}

.floating-nav button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.floating-nav span {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    border-left: 1px solid var(--border-color);
    border-right: 1px solid var(--border-color);
    padding: 0 0.75rem;
}

/* Responsive Queries */
@media (max-width: 768px) {
    body {
        overflow-x: hidden;
    }

    .search-section h1 {
        font-size: 1.75rem !important;
        line-height: 1.3;
    }
    
    .nav-container {
        padding: 0.8rem 1rem;
    }
    
    main {
        padding: 1rem 0.75rem;
    }
    
    .search-input {
        font-size: 0.85rem !important;
        padding-right: 110px !important;
        padding-left: 2.2rem !important;
    }

    #btn-quick-read {
        padding: 0 0.85rem !important;
        font-size: 0.78rem !important;
    }

    .books-grid {
        grid-template-columns: repeat(auto-fill, minmax(135px, 1fr));
        gap: 0.85rem;
    }
    
    .book-card {
        padding: 0.6rem;
    }
    
    .book-title {
        font-size: 0.82rem;
        height: 2.3rem;
    }
    
    .reader-header {
        padding: 0.5rem;
    }
    
    .reader-left {
        max-width: 50%;
    }
    
    .reader-book-title {
        font-size: 0.95rem;
    }
    
    .floating-nav {
        bottom: 1.5rem;
        width: calc(100% - 2rem);
        max-width: 320px;
        justify-content: space-between;
    }
    
    .floating-nav button span {
        display: none;
    }
    
    .reader-body {
        padding: 1rem 0.5rem;
    }
}

/* Page-Flip Library Styles */
#flipbook {
    margin: 0 auto;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.8);
    background: #1f2937;
}

.page-element {
    background-color: #ffffff;
    overflow: hidden;
    box-shadow: inset 0 0 12px rgba(0, 0, 0, 0.15);
}

#flipbook-wrapper {
    overflow: hidden;
    padding: 1rem 0;
}

canvas {
    display: block;
}

/* Büyüteç aktifken sayfa çevirmeyi durdurmak için */
.magnifying-active {
    pointer-events: none !important;
}