/* Terapkan variabel ke elemen global */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-body);
    /* min-width: 30rem; */
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, var(--bg-body) 0%, var(--bg-navbar) 100%);
    padding: 5rem 0;
    margin-bottom: 2rem;
    border-bottom: 5px solid var(--kuning);
}
.hero-title {
    color: var(--biru);
    font-weight: 700;
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}
.hero-subtitle {
    color: var(--hijau);
    font-size: 1.2rem;
    margin-bottom: 2rem;
}
.feature-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: 0 5px 15px var(--shadow-color);
}
.feature-red { background-color: var(--merah); color: white; }
.feature-yellow { background-color: var(--kuning); color: #212529; }
.feature-green { background-color: var(--hijau); color: white; }
.feature-blue { background-color: var(--biru); color: white; }

/* Kategori Cards */
.category-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: all 0.3s ease;
    overflow: hidden;
}
.category-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px var(--shadow-hover);
}
.category-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}
.text-red { color: var(--merah); }
.text-yellow { color: var(--kuning); }
.text-green { color: var(--hijau); }
.text-blue { color: var(--biru); }

/* Buku Cards */
.book-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    height: 100%;
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.book-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px var(--shadow-hover);
}

.card-body h4, .card-body p, .card-body div {
    height: 3rem;
}

.card-text {
    /* width: 300px;                /* Tentukan lebar kontainer */
      display: -webkit-box;        /* Wajib */
      -webkit-box-orient: vertical;/* Wajib: Mengatur arah teks vertikal */
      line-clamp: 3;       /* Jumlah baris maksimal sebelum dipotong */
      overflow: hidden;            /* Menyembunyikan teks yang meluap */
      
      /* Opsional: styling tambahan */
    text-align:justify;
      line-height: 1.4;            /* Mengatur jarak antar baris */
      max-height: 4.4em;           /* line-height * jumlah baris (1.5 * 3) */
    color: var(--text-primary);
}

.book-image {
    background-color: var(--bg-body);
    height: 20rem;
    width: 30em;
    max-width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.book-image img {
    width: 100%;
    height: 100%;
    object-fit: fill; /* Gambar akan di-crop agar penuh, tapi tidak gepeng */
}

.book-badge {
    position: absolute;
    top: 1rem;
    left: 1rem;
    padding: 0.25rem 1rem;
    border-radius: 20px;
    font-weight: 600;
}
.btn-green {
    background-color: var(--hijau);
    border-color: var(--hijau);
    color: white;
}
.btn-green:hover {
    background-color: #21867a;
    border-color: #21867a;
}
.btn-red {
    background-color: var(--merah);
    border-color: var(--merah);
    color: white;
}
.btn-red:hover {
    background-color: #d62839;
    border-color: #d62839;
}
.btn-blue {
    background-color: var(--biru);
    border-color: var(--biru);
    color: white;
}
.btn-blue:hover {
    background-color: #152642;
    border-color: #152642;
}
.btn-add-book {
    background-color: var(--kuning);
    border-color: var(--kuning);
    color: #212529;
}
.btn-add-book:hover {
    background-color: #e6b85c;
    border-color: #e6b85c;
}

/* Animasi fade-in (opsional) */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}
.animate-fade-in-up {
    animation: fadeInUp 0.8s ease-out forwards;
}
.delay-1 { animation-delay: 0.2s; opacity: 0; }
.delay-2 { animation-delay: 0.4s; opacity: 0; }
.delay-3 { animation-delay: 0.6s; opacity: 0; }

/* Responsif */
@media (max-width: 768px) {
    .hero-title { font-size: 2rem; }
    .theme-toggle { margin-left: 0.5rem; }
}