:root {
    --bg-card: rgba(255, 255, 255, 0.04);
    --border-subtle: rgba(255, 255, 255, 0.1);
    --color-primary: #8b5cf6;
}

/* --- BASICS --- */
.back-btn {
    position: fixed; top: 2rem; left: 2rem; z-index: 100; display: flex; align-items: center; gap: 0.5rem;
    padding: 0.8rem 1.5rem; background: var(--color-glass-bg); backdrop-filter: blur(12px);
    border: var(--border-subtle); border-radius: 8px; /* Anime style */
    color: white; text-decoration: none; font-weight: 600; transition: all 0.2s ease;
}
.back-btn:hover { background: rgba(255, 255, 255, 0.15); transform: translateX(-5px); }

.hero-wrapper { position: relative; width: 100%; height: 60vh; overflow: hidden; }
.hero-background { position: absolute; inset: 0; z-index: 0; }
.hero-background img { width: 100%; height: 100%; object-fit: cover; opacity: 0.4; filter: blur(8px); transform: scale(1.1); }
.hero-overlay { position: absolute; inset: 0; z-index: 1; background: linear-gradient(to bottom, transparent 0%, var(--color-bg-base) 100%); }

.content-container {
    position: relative; z-index: 10; max-width: 1400px; margin: -300px auto 0 auto;
    padding: 0 3rem 4rem 3rem;
}

/* --- HEADER SECTION --- */
.book-header-section { margin-bottom: 4rem; max-width: 900px; }
.book-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem); font-weight: 900;
    margin-bottom: 0.5rem; text-shadow: 0 4px 30px rgba(0,0,0,0.6); line-height: 1.1;
}

.hero-meta-info {
    display: flex; align-items: center; gap: 0.8rem;
    color: rgba(255,255,255,0.7); font-weight: 600; margin-bottom: 1.2rem;
    flex-wrap: wrap;
}
.meta-separator { color: rgba(255,255,255,0.3); font-size: 0.8rem; }

.pill-local {
    background: #22c55e; color: black; padding: 2px 8px;
    border-radius: 4px; font-size: 0.75rem; font-weight: 900;
}

.hero-description-mini {
    font-size: 1.05rem; line-height: 1.5; color: rgba(255,255,255,0.8);
    margin-bottom: 1.2rem; max-width: 700px;
    display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}
.hero-tags {
    display: flex; flex-wrap: wrap; gap: 1rem; margin-bottom: 2.5rem;
    color: rgba(255,255,255,0.5); font-weight: 500;
}

/* --- BUTTONS --- */
.action-row { display: flex; align-items: center; gap: 1rem; }
.btn-read {
    padding: 0.8rem 2.2rem; background: white; color: black;
    border-radius: 8px; font-weight: 800; border: none; cursor: pointer;
    display: flex; align-items: center; gap: 0.6rem; transition: 0.2s ease;
}
.btn-read:hover { transform: scale(1.03); filter: brightness(0.9); }

.btn-add-list {
    padding: 0.8rem 1.5rem; background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.2); color: white;
    border-radius: 8px; font-weight: 700; cursor: pointer; transition: 0.2s;
}
.btn-add-list:hover { background: rgba(255,255,255,0.2); }


/* --- MAIN LAYOUT --- */
.main-layout { display: grid; grid-template-columns: 280px 1fr; gap: 4rem; margin-top: 2rem; }

/* Sidebar */
.poster-section { display: flex; flex-direction: column; gap: 1.5rem; }
.poster-card {
    border-radius: 12px; overflow: hidden; width: 100%;
    box-shadow: 0 30px 60px rgba(0,0,0,0.5); border: 1px solid var(--border-subtle);
}
.poster-card img { width: 100%; height: auto; display: block; aspect-ratio: 2/3; object-fit: cover; }

/* Sidebar Extra Info (Synonyms) */
.sidebar-extra-info {
    background: rgba(255,255,255,0.03); padding: 1.5rem;
    border-radius: 16px; border: 1px solid rgba(255,255,255,0.08);
}
.sidebar-label {
    font-size: 0.8rem; color: #888; text-transform: uppercase; margin: 0 0 1rem 0; letter-spacing: 0.5px;
}
.synonyms-list {
    list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 0.5rem;
}
.synonyms-list li {
    font-size: 0.9rem; color: #ddd; line-height: 1.4; border-bottom: 1px solid rgba(255,255,255,0.05); padding-bottom: 0.5rem;
}
.synonyms-list li:last-child { border-bottom: none; }


/* --- CONTENT COLUMN --- */
.content-section { margin-top: 4rem; }
h2, .subsection-title { font-size: 1.8rem; font-weight: 800; margin-bottom: 1.5rem; color: white; }

/* Chapters Section */
.chapters-section { border-top: 1px solid rgba(255,255,255,0.1); padding-top: 1rem; }
.chapters-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.5rem; flex-wrap: wrap; gap: 1rem; }

/* Chapter Controls */
.chapter-controls { display: flex; gap: 0.6rem; align-items: center; flex-wrap: wrap; }
.glass-select, .glass-input {
    appearance: none; -webkit-appearance: none;
    background-color: rgba(0, 0, 0, 0.4);
    background-image: url("data:image/svg+xml,%3Csvg width='10' height='6' viewBox='0 0 10 6' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L5 5L9 1' stroke='rgba(255,255,255,0.7)' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat; background-position: right 0.8rem center; background-size: 10px;
    border: 1px solid rgba(255, 255, 255, 0.1); color: rgba(255, 255, 255, 0.9);
    padding: 0.4rem 2rem 0.4rem 0.8rem; border-radius: 6px; font-size: 0.8rem; font-weight: 500; height: 34px;
    outline: none; backdrop-filter: blur(4px); transition: all 0.2s ease; cursor: pointer; min-width: 110px;
}
.glass-input { background-image: none; padding: 0.4rem 0.8rem; width: 180px; }
.glass-input:focus { border-color: var(--color-primary); width: 220px; }
.glass-btn-icon { width: 34px; height: 34px; border-radius: 6px; background: rgba(255, 255, 255, 0.05); border: 1px solid rgba(255, 255, 255, 0.1); color: white; display: flex; align-items: center; justify-content: center; cursor: pointer; transition: all 0.2s; }
.glass-btn-icon:hover { background: var(--color-primary); border-color: var(--color-primary); }

/* Chapters Grid */
.chapters-grid { display: flex; flex-direction: column; gap: 0.5rem; }
.chapter-item {
    display: flex; align-items: center; justify-content: space-between;
    background: rgba(255, 255, 255, 0.03); border: 1px solid rgba(255, 255, 255, 0.05);
    padding: 0.8rem 1.2rem; border-radius: 8px;
    transition: all 0.2s ease; cursor: pointer; position: relative; overflow: hidden;
}
.chapter-item:hover { background: rgba(255, 255, 255, 0.08); transform: translateX(5px); border-color: rgba(255, 255, 255, 0.2); }
.chapter-item::before { content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 4px; background: var(--color-primary); opacity: 0; transition: opacity 0.2s; }
.chapter-info { display: flex; flex-direction: column; gap: 0.2rem; }
.chapter-number { font-size: 0.85rem; font-weight: 600; color: var(--color-text-secondary); text-transform: uppercase; }
.chapter-title { font-size: 1rem; font-weight: 500; color: white; }
.chapter-meta { display: flex; align-items: center; gap: 1rem; font-size: 0.85rem; color: #888; }
.lang-tag { font-size: 0.7rem; padding: 2px 6px; border-radius: 4px; background: rgba(255,255,255,0.1); text-transform: uppercase; color: #ccc; }


/* --- RELATIONS (Horizontal Cards) --- */
.relations-horizontal { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 1rem; }
.relation-card-horizontal {
    display: flex; background: var(--bg-card); border: 1px solid var(--border-subtle);
    border-radius: 10px; overflow: hidden; transition: 0.2s; cursor: pointer;
}
.relation-card-horizontal:hover { background: rgba(255,255,255,0.08); transform: translateX(5px); }
.rel-img { width: 85px; height: 110px; object-fit: cover; }
.rel-info { padding: 1rem; display: flex; flex-direction: column; justify-content: center; }
.rel-type {
    font-size: 0.7rem; color: var(--color-primary); font-weight: 800;
    margin-bottom: 4px; background: rgba(139, 92, 246, 0.1); width: fit-content; padding: 2px 6px; border-radius: 4px;
}
.rel-title { font-size: 0.95rem; font-weight: 700; color: #eee; }


/* --- CHARACTERS (Grid Style) --- */
.characters-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1.5rem; margin-top: 1rem; }
.character-item { display: flex; align-items: center; gap: 1rem; }
.char-avatar { width: 60px; height: 60px; border-radius: 10px; overflow: hidden; flex-shrink: 0; }
.char-avatar img { width: 100%; height: 100%; object-fit: cover; }
.char-info { display: flex; flex-direction: column; gap: 2px; }
.char-name { font-size: 1rem; font-weight: 700; color: #fff; }
.char-role { font-size: 0.8rem; color: #888; font-weight: 500; }

/* --- PAGINATION --- */
.pagination-controls { display: flex; justify-content: center; gap: 1rem; margin-top: 2rem; align-items: center; }
.page-btn { background: var(--color-bg-elevated); border: 1px solid rgba(255, 255, 255, 0.1); color: white; padding: 0.5rem 1rem; border-radius: 8px; cursor: pointer; font-size: 0.9rem; }
.page-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.page-btn:hover:not(:disabled) { border-color: var(--color-primary); }


@media (max-width: 1024px) {
    .content-container { margin-top: -150px; padding: 0 1.5rem; }
    .main-layout { grid-template-columns: 1fr; gap: 2rem; }
    .poster-section { display: flex; flex-direction: column; align-items: center; }
    .poster-card { width: 220px; }
    .metadata-sidebar { width: 100%; max-width: 400px; }
}

@media (max-width: 768px) {
    .hero-wrapper { height: 40vh; }
    .book-title { font-size: 2.5rem; }
    .action-row { flex-direction: column; width: 100%; }
    .btn-read, .btn-add-list { width: 100%; justify-content: center; }
    .chapters-header { flex-direction: column; align-items: flex-start; }
    .chapter-controls { width: 100%; display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem; }
    .search-box { grid-column: span 2; }
    .glass-input { width: 100%; }
}