:root {
    --bg-paper: #FDFBF7;
    --text-ink: #2C241B;
    --accent-gold: #B8860B;
    --accent-terracotta: #C45F27; /* Simile all'arancione Amazon, ma più caldo/antico */
    --border-light: #E6DFD5;
    --font-heading: 'Merriweather', serif;
    --font-body: 'Source Sans Pro', sans-serif;
}

body {
    background-color: var(--bg-paper);
    color: var(--text-ink);
    font-family: var(--font-body);
    margin: 0;
    line-height: 1.6;
}

h1, h2, h3, h4 { font-family: var(--font-heading); color: var(--text-ink); }

/* Header & Nav */
header { background: #fff; border-bottom: 3px solid var(--accent-gold); padding: 1rem 0; }
.nav-container { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; padding: 0 1rem; }
.logo { font-family: var(--font-heading); font-size: 1.8rem; font-weight: bold; color: var(--accent-terracotta); text-decoration: none; }
.nav-links a { margin-left: 1.5rem; text-decoration: none; color: var(--text-ink); font-weight: 600; }
.nav-links a:hover { color: var(--accent-terracotta); }

/* Hero Section */
.hero { background: linear-gradient(rgba(44,36,27,0.7), rgba(44,36,27,0.7)), url('/img/hero-library.jpg'); background-size: cover; color: #fff; text-align: center; padding: 4rem 1rem; }
.hero h1 { color: #fff; font-size: 2.5rem; margin-bottom: 0.5rem; }

/* Search Bar */
.search-box { max-width: 600px; margin: 2rem auto; display: flex; }
.search-box input { flex: 1; padding: 0.8rem; border: 1px solid var(--border-light); border-radius: 4px 0 0 4px; font-size: 1rem; }
.search-box button { padding: 0.8rem 1.5rem; background: var(--accent-terracotta); color: #fff; border: none; border-radius: 0 4px 4px 0; cursor: pointer; font-weight: bold; }

/* Book Grid */
.book-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 2rem; max-width: 1200px; margin: 2rem auto; padding: 0 1rem; }
.book-card { background: #fff; border: 1px solid var(--border-light); border-radius: 6px; overflow: hidden; transition: transform 0.2s, box-shadow 0.2s; }
.book-card:hover { transform: translateY(-5px); box-shadow: 0 10px 20px rgba(0,0,0,0.1); }
.book-card img {
    width: 100%;
    height: 350px; /* Mantieni l'altezza che preferisci */
    object-fit: contain; /* CAMBIA DA 'cover' A 'contain' */
    background-color: #f9f7f2; /* Aggiunge uno sfondo color pergamena per gli spazi vuoti */
}
.book-info { padding: 1rem; }
.book-title { font-size: 1.1rem; font-weight: bold; margin: 0 0 0.3rem 0; color: var(--accent-terracotta); text-decoration: none; }
.book-meta { font-size: 0.9rem; color: #666; margin-bottom: 0.5rem; }
.book-desc { font-size: 0.9rem; color: #444; display: -webkit-box; -webkit-line-clamp: 4; -webkit-box-orient: vertical; overflow: hidden; }

/* Book Detail Page */
.book-detail { max-width: 1000px; margin: 2rem auto; padding: 0 1rem; display: flex; gap: 2rem; flex-wrap: wrap; }
.cover-container { perspective: 1000px; width: 300px; height: 450px; cursor: pointer; }
.cover-inner { position: relative; width: 100%; height: 100%; transition: transform 0.6s; transform-style: preserve-3d; }
.cover-container:hover .cover-inner { transform: rotateY(180deg); }
.cover-front, .cover-back { position: absolute; width: 100%; height: 100%; backface-visibility: hidden; border-radius: 4px; box-shadow: 0 5px 15px rgba(0,0,0,0.2); }
.cover-back { transform: rotateY(180deg); object-fit: cover; }

.book-main-info { flex: 1; min-width: 300px; }
.amazon-btn { display: inline-block; background: #FF9900; color: #111; padding: 1rem 2rem; text-decoration: none; font-weight: bold; border-radius: 4px; margin-top: 1rem; font-size: 1.1rem; transition: background 0.2s; }
.amazon-btn:hover { background: #e68a00; }

/* Admin */
.admin-container { max-width: 800px; margin: 2rem auto; padding: 2rem; background: #fff; border-radius: 8px; box-shadow: 0 2px 10px rgba(0,0,0,0.1); }
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; margin-bottom: 0.5rem; font-weight: bold; }
.form-group input, .form-group textarea, .form-group select { width: 100%; padding: 0.8rem; border: 1px solid #ccc; border-radius: 4px; }
.drop-zone { border: 2px dashed #ccc; padding: 2rem; text-align: center; border-radius: 4px; cursor: pointer; transition: border 0.2s; }
.drop-zone:hover { border-color: var(--accent-terracotta); }

/* Footer */
footer { background: var(--text-ink); color: #ccc; text-align: center; padding: 2rem 1rem; margin-top: 3rem; }
footer a { color: var(--accent-gold); }