.page-404 {
    position: relative;
    background: #f3f3f3;
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

/* 404 gigante fondo */
.error-bg {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 260px;
    font-weight: 700;
    color: #dcdcdc;
    z-index: 1;
    pointer-events: none;
}

/* texto principal */
.error-title {
    position: relative;
    z-index: 2;
    font-size: 36px;
    font-weight: 500;
    margin-bottom: 30px;
    color: #333;
}

/* botones */
.error-actions {
    position: relative;
    z-index: 2;
}

.error-actions .btn {
    margin: 5px;
    padding: 12px 22px;
    border-radius: 6px;
    font-weight: 500;
}

/* bot¨Žn negro */
.btn-dark {
    background: #000;
    color: #fff;
    border: 0;
}

/* bot¨Žn gris */
.btn-gray {
    background: #3a3a3a;
    color: #fff;
}