/* =========================
   TEMA ACERVO - PRETO/AZUL
========================= */
 
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
 
body {
    background: #0a0f1f;
    color: #e6f1ff;
    font-family: Arial, Helvetica, sans-serif;
    padding: 30px;
}
 
/* Título */
h1 {
    text-align: center;
    margin-bottom: 25px;
    color: #4da3ff;
    text-shadow: 0 0 10px rgba(77, 163, 255, 0.4);
}
 
/* Formulário de filtros */
form {
    display: flex;
    gap: 10px;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 20px;
}
 
input[type="text"],
select {
    background: #121a2f;
    color: #fff;
    border: 1px solid #2f4f7f;
    border-radius: 8px;
    padding: 10px 12px;
    min-width: 220px;
    outline: none;
    transition: 0.3s;
}
 
input[type="text"]:focus,
select:focus {
    border-color: #4da3ff;
    box-shadow: 0 0 8px rgba(77, 163, 255, 0.5);
}
 
/* Botões */
button {
    background: linear-gradient(135deg, #0066cc, #00aaff);
    color: white;
    border: none;
    border-radius: 8px;
    padding: 10px 18px;
    cursor: pointer;
    font-weight: bold;
    transition: 0.3s;
}
 
button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 170, 255, 0.4);
}
 
/* Linha separadora */
hr {
    border: none;
    height: 1px;
    background: #243b63;
    margin: 25px 0;
}
 
/* Grid dos livros */
.livros-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
}
 
/* Card */
.livro-card {
    width: 220px;
    background: #121a2f;
    border: 1px solid #243b63;
    border-radius: 12px;
    padding: 12px;
    transition: 0.3s;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
}
 
.livro-card:hover {
    transform: translateY(-5px);
    border-color: #4da3ff;
    box-shadow: 0 0 15px rgba(77, 163, 255, 0.3);
}
 
/* Capa */
.capa-livro {
    width: 100%;
    height: 260px;
    object-fit: cover;
    border-radius: 8px;
}
 
/* Placeholder */
.sem-capa {
    width: 100%;
    height: 260px;
    background: #1f2b46;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #8fbfff;
    border-radius: 8px;
}
 
/* Informações */
.livro-card h3 {
    margin: 10px 0;
    color: #66b3ff;
    font-size: 18px;
}
 
.livro-card small {
    display: block;
    margin-bottom: 5px;
    color: #c9dfff;
}
 
/* Link */
.livro-card a {
    text-decoration: none;
    display: block;
    margin-top: 10px;
}