*{
    margin:0;
    padding:0;
    box-sizing:border-box;
}

body{
    background:#0f0f0f;
    color:#fff;
    font-family:Arial, Helvetica, sans-serif;
}

.detalle-libro{
    min-height:100vh;
    padding:110px 20px 80px;
}

.libro{
    width:90%;
    max-width:1200px;
    margin:0 auto;

    display:grid;
    grid-template-columns:minmax(280px, 420px) 1fr;
    gap:80px;
    align-items:center;
}

/* PORTADA */

.portada{
    position:relative;
}

.portada img{
    display:block;
    width:100%;
    border-radius:8px;

    box-shadow:
        0 25px 60px rgba(0,0,0,.55),
        16px 16px 0 #1c1c1c;

    transition:.4s;
}

.portada img:hover{
    transform:translateY(-8px) rotate(-1deg);
}

.etiqueta-portada{
    position:absolute;
    top:20px;
    left:-18px;
    z-index:2;

    padding:10px 18px;
    background:#c4a35a;
    color:#111;

    font-size:12px;
    font-weight:bold;
    letter-spacing:2px;
}

/* INFORMACIÓN */

.info{
    max-width:680px;
}

.categoria,
.subtitulo{
    color:#c4a35a;
    font-size:13px;
    font-weight:bold;
    letter-spacing:4px;
}

.info h1{
    margin:18px 0 12px;

    font-family:"Cormorant Garamond", serif;
    font-size:64px;
    line-height:1;
}

.autor{
    color:#aaa;
    font-size:18px;
    margin-bottom:35px;
}

.autor strong{
    color:#fff;
}

.frase-libro{
    margin:30px 0;
    padding-left:25px;

    border-left:2px solid #c4a35a;

    font-family:"Cormorant Garamond", serif;
    font-size:27px;
    line-height:1.45;
    font-style:italic;
    color:#dedede;
}

.descripcion{
    color:#cfcfcf;
    font-size:17px;
    line-height:1.85;
}

.descripcion p + p{
    margin-top:18px;
}

/* DATOS */

.datos{
    display:grid;
    grid-template-columns:repeat(2, 1fr);
    gap:15px;

    margin:38px 0;
}

.dato{
    padding:18px;
    background:#181818;
    border:1px solid rgba(255,255,255,.08);
    border-radius:8px;
}

.dato span{
    display:block;
    margin-bottom:7px;

    color:#999;
    font-size:12px;
    letter-spacing:2px;
    text-transform:uppercase;
}

.dato strong{
    font-family:"Cormorant Garamond", serif;
    font-size:21px;
    font-weight:600;
}

/* ACCIONES */

.acciones{
    display:flex;
    align-items:center;
    gap:28px;
    flex-wrap:wrap;
}

.btn-compra{
    display:inline-block;
    padding:15px 30px;

    border:2px solid #c4a35a;
    background:#c4a35a;
    color:#111;

    text-decoration:none;
    font-weight:bold;
    transition:.3s;
}

.btn-compra:hover{
    background:transparent;
    color:#fff;
}

.volver{
    display:inline-flex;
    align-items:center;
    gap:8px;

    color:#bdbdbd;
    text-decoration:none;

    font-size:16px;
    font-weight:500;

    transition:.3s ease;
}

.volver:hover{
    color:#c4a35a;
    transform:translateX(-5px);
}

.volver:hover{
    color:#c4a35a;
}

/* SECCIÓN COMPLEMENTARIA */

.sobre-libro{
    width:90%;
    max-width:950px;
    margin:130px auto 30px;
    padding-top:70px;

    border-top:1px solid rgba(255,255,255,.1);
    text-align:center;
}

.sobre-libro h2{
    margin:18px 0 22px;

    font-family:"Cormorant Garamond", serif;
    font-size:48px;
}

.sobre-libro p{
    max-width:760px;
    margin:0 auto;

    color:#cfcfcf;
    font-size:18px;
    line-height:1.85;
}

/* RESPONSIVE */

@media(max-width:900px){

    .detalle-libro{
        padding-top:70px;
    }

    .libro{
        grid-template-columns:1fr;
        gap:55px;
    }

    .portada{
        width:80%;
        max-width:420px;
        margin:0 auto;
    }

    .info{
        max-width:none;
    }

    .info h1{
        font-size:52px;
    }
}

@media(max-width:600px){

    .detalle-libro{
        padding-left:15px;
        padding-right:15px;
    }

    .libro{
        width:95%;
    }

    .portada{
        width:90%;
    }

    .info h1{
        font-size:42px;
    }

    .frase-libro{
        font-size:23px;
    }

    .datos{
        grid-template-columns:1fr;
    }

    .acciones{
        align-items:flex-start;
        flex-direction:column;
        gap:20px;
    }

    .sobre-libro{
        margin-top:90px;
    }

    .sobre-libro h2{
        font-size:38px;
    }
}