body{
    margin:0;
    font-family:Arial, sans-serif;
    background:#f8fafc;
    color:#0f172a;
    line-height:1.7;
}

/* CONTAINER */
.container{
    max-width:900px;
    margin:80px auto;
    background:#fff;
    padding:50px;
    border-radius:20px;
    box-shadow:0 10px 30px rgba(0,0,0,0.08);
    border-top:5px solid #1d4ed8;
}

/* TITULOS */
h1{
    color:#1d4ed8;
    font-size:36px;
    margin-bottom:10px;
}

h2{
    color:#1d4ed8;
    margin-top:40px;
    font-size:24px;
}

/* TEXTO */
p{
    color:#334155;
    font-size:16px;
    text-align:justify;
}

/* BLOCOS */
.block{
    margin-top:20px;
    padding:20px;
    background:#f1f5f9;
    border-radius:15px;
}

/* HEADER */
.header{
    text-align:center;
    padding:40px 20px 0;
}

.logo{
    font-size:40px;
    font-weight:bold;
    color:#1d4ed8;
}

/* FOOTER */
footer{
    text-align:center;
    margin-top:50px;
    color:#64748b;
    font-size:14px;
}

.back-btn{
    position:fixed;
    top:20px;
    left:20px;
    z-index:999;

    display:flex;
    align-items:center;
    gap:10px;

    padding:12px 18px;
    border-radius:999px;

    color:#1d4ed8;
    text-decoration:none;
    font-weight:600;
    font-size:14px;

    background:rgba(255,255,255,0.7);
    backdrop-filter:blur(12px);

    border:1px solid rgba(29,78,216,0.2);

    box-shadow:
        0 10px 25px rgba(0,0,0,0.08),
        inset 0 0 0 1px rgba(255,255,255,0.4);

    overflow:hidden;

    transition:all .35s ease;

    animation:slideIn .6s ease;
}

/* ÍCONE */
.back-btn i{
    transition:transform .3s ease;
}

/* HOVER */
.back-btn:hover{
    transform:translateY(-3px) scale(1.03);
    background:#1d4ed8;
    color:#fff;
    box-shadow:0 15px 35px rgba(29,78,216,0.35);
}

.back-btn:hover i{
    transform:translateX(-4px);
}

/* EFEITO DE BRILHO PASSANDO */
.back-btn::before{
    content:"";
    position:absolute;
    top:0;
    left:-120%;
    width:60%;
    height:100%;
    background:linear-gradient(
        120deg,
        transparent,
        rgba(255,255,255,0.6),
        transparent
    );
    transform:skewX(-20deg);
}

.back-btn:hover::before{
    animation:shine .8s ease;
}

/* ANIMAÇÕES */
@keyframes shine{
    from{
        left:-120%;
    }
    to{
        left:120%;
    }
}

@keyframes slideIn{
    from{
        opacity:0;
        transform:translateY(-15px);
    }
    to{
        opacity:1;
        transform:translateY(0);
    }
}