4 */article,aside,details,figcaption,figure,footer,header,hgroup,main,nav,section
,summary{display:block}audio,canvas,video{display:inline-block;*display:inline;*
zoom:1}audio:not([controls]){display:none;height:0}[hidden],template{display:non
e}html{font-family:sans-serif;font-size:100%;-ms-text-size-adjust:100%;-webkit-t
ext-size-adjust:100%}button,input,select,textarea{font-family:sans-serif}body{ma
rgin:0}a{background:transparent}a:focus{outline:thin dotted}a:active,a:hover{out
line:0}p,pre{margin:1.5em 0}blockquote{margin:1.5em 40px}h1{font-size:2em;line-h
eight:1.5em;margin-top:0.75em;margin-bottom:0.75em}h2{font-size:1.5em;line-heigh
t:2em;margin-top:1em;margin-bottom:1em}h3{font-size:1.17em;line-height:1.28205em
;margin-top:1.28205em;margin-bottom:1.28205em}h4{font-size:1em;line-height:1.5em
;margin-top:1.5em;margin-bottom:1.5em}h5{font-size:0.83em;line-height:1.80723em;
margin-top:1.80723em;margin-bottom:1.80723em}h6{font-size:0.67em;line-height:2.2
3881em;margin-top:2.23881em;margin-bottom:2.23881em}abbr[title]{border-bottom:1p
x dotted}b,strong{font-weight:bold}dfn{font-style:italic}hr{-webkit-box-sizing:c
ontent-box;-moz-box-sizing:content-box;box-sizing:content-box;height:0}mark{back
ground:#ff0;color:#000}code,kbd,pre,samp{font-family:monospace, serif;_font-fami
ly:'courier new', monospace;font-size:1em}pre{white-space:pre;white-space:pre-wr
ap;word-wrap:break-word}q{quotes:"\201C" "\201D" "\2018" "\2019"}small{font-size
:80%}sub,sup{font-size:75%;line-height:0;position:relative;vertical-align:baseli
ne}sup{top:-0.5em}sub{bottom:-0.25em}dl,menu,ol,ul{margin:1.5em 0}dd{margin:0 0
0 40px}menu,ol,ul{padding:0 0 0 40px}nav ul,nav ol{list-style:none;list-style-im
age:none}img{border:0;-ms-interpolation-mode:bicubic}svg:not(:root){overflow:hid
den}figure{margin:0}form{margin:0}fieldset{margin:0 2px;border-color:#c0c0c0;bor
der-top-style:solid;border-top-width:0.0625em;padding-top:0.4625em;border-bottom
-style:solid;border-bottom-width:0.0625em;padding-bottom:0.9125em;border-left-st
yle:solid;border-left-width:0.0625em;padding-left:0.875em;border-right-style:sol
id;border-right-width:0.0625em;padding-right:0.875em}legend{border:0;padding:0;*
margin-left:-7px}button,input,select,textarea{font-family:inherit;font-size:100%
;margin:0;vertical-align:baseline;*vertical-align:middle}button,input{line-heigh
t:normal}button,select{text-transform:none}button,html input[type="button"],inpu
t[type="reset"],input[type="submit"]{-webkit-appearance:button;cursor:pointer;*o
verflow:visible}button[disabled],html input[disabled]{cursor:default}input[type=
"checkbox"],input[type="radio"]{-webkit-box-sizing:border-box;-moz-box-sizing:bo
rder-box;box-sizing:border-box;padding:0;*height:13px;*width:13px}input[type="se
arch"]{-webkit-appearance:textfield;-webkit-box-sizing:content-box;-moz-box-sizi
ng:content-box;box-sizing:content-box}input[type="search"]::-webkit-search-cance
l-button,input[type="search"]::-webkit-search-decoration{-webkit-appearance:none
}button::-moz-focus-inner,input::-moz-focus-inner{border:0;padding:0}textarea{ov
erflow:auto;vertical-align:top}table{border-collapse:collapse;border-spacing:0}*
html{font-size:100%}html{font-size:16px;line-height:1.5em}* html{font-size:100%
}html{font-size:16px;line-height:1.5em}.g-section:after{content:".";display:bloc
k;height:0;clear:both;visibility:hidden}.g-unit .g-section:after{clear:none}.g-u
nit .g-section{width:100%;overflow:hidden}.g-section,.g-unit{zoom:1}.g-split>.g-
unit{float:right;text-align:right}.g-split>.g-first{float:left;text-align:left}.
g-tpl-160 .g-unit,.g-unit .g-tpl-160 .g-unit,.g-unit .g-unit .g-tpl-160 .g-unit,
.g-unit .g-unit .g-unit .g-tpl-160 .g-unit,.g-unit .g-unit .g-unit .g-unit .g-tp
l-160 .g-unit,.g-unit .g-unit .g-unit .g-unit .g-unit .g-tpl-160 .g-unit{display
:block;margin:0 0 0 160px;width:auto;float:none}.g-tpl-160 .g-first,.g-unit .g-t
pl-160 .g-first,.g-unit .g-unit .g-tpl-160 .g-first,.g-unit .g-unit .g-unit .g-t
pl-160 .g-first,.g-unit .g-unit .g-unit .g-unit .g-tpl-160 .g-first,.g-unit .g-u
nit .g-unit .g-unit .g-unit .g-tpl-160 .g-first{display:block;margin:0;width:160
px;float:left}.g-tpl-25-75 .g-unit,.g-unit .g-tpl-25-75 .g-unit,.g-unit .g-unit
.g-tpl-25-75 .g-unit,.g-unit .g-unit .g-unit .g-tpl-25-75 .g-unit,.g-unit .g-uni
t .g-unit .g-unit .g-tpl-25-75 .g-unit,.g-unit .g-unit .g-unit .g-unit .g-unit .
g-tpl-25-75 .g-unit{width:74.999%;float:right;display:inline;margin:0}.g-tpl-25-
75 .g-first,.g-unit .g-tpl-25-75 .g-first,.g-unit .g-unit .g-tpl-25-75 .g-first,
.g-unit .g-unit .g-unit .g-tpl-25-75 .g-first,.g-unit .g-unit .g-unit .g-unit .g
-tpl-25-75 .g-first,.g-unit .g-unit .g-unit .g-unit .g-unit .g-tpl-25-75 .g-firs
t{width:24.999%;float:left;display:inline;margin:0}.g-tpl-75-25 .g-unit,.g-unit
.g-tpl-75-25 .g-unit,.g-unit .g-unit .g-tpl-75-25 .g-unit,.g-unit .g-unit .g-uni
t .g-tpl-75-25 .g-unit,.g-unit .g-unit .g-unit .g-unit .g-tpl-75-25 .g-unit,.g-u
nit .g-unit .g-unit .g-unit .g-unit .g-tpl-75-25 .g-unit{width:24.999%;float:rig
ht;display:inline;margin:0}.g-tpl-75-25 .g-first,.g-unit .g-tpl-75-25 .g-first,.
g-unit .g-unit .g-tpl-75-25 .g-first,.g-unit .g-unit .g-unit .g-tpl-75-25 .g-fir
st,.g-unit .g-unit .g-unit .g-unit .g-tpl-75-25 .g-first,.g-unit .g-unit .g-unit
.g-unit .g-unit .g-tpl-75-25 .g-first{width:74.999%;float:left;display:inline;m
argin:0}.g-tpl-33-67 .g-unit,.g-unit .g-tpl-33-67 .g-unit,.g-unit .g-unit .g-tpl
-33-67 .g-unit,.g-unit .g-unit .g-unit .g-tpl-33-67 .g-unit,.g-unit .g-unit .g-u
nit .g-unit .g-tpl-33-67 .g-unit,.g-unit .g-unit .g-unit .g-unit .g-unit .g-tpl-
33-67 .g-unit{width:66.999%;float:right;display:inline;margin:0}.g-tpl-33-67 .g-
first,.g-unit .g-tpl-33-67 .g-first,.g-unit .g-unit .g-tpl-33-67 .g-first,.g-uni
t .g-unit .g-unit .g-tpl-33-67 .g-first,.g-unit .g-unit .g-unit .g-unit .g-tpl-3
3-67 .g-first,.g-unit .g-unit .g-unit .g-unit .g-unit .g-tpl-33-67 .g-first{widt
h:32.999%;float:left;display:inline;margin:0}.g-tpl-67-33 .g-unit,.g-unit .g-tpl
-67-33 .g-unit,.g-unit .g-unit .g-tpl-67-33 .g-unit,.g-unit .g-unit .g-unit .g-t
pl-67-33 .g-unit,.g-unit .g-unit .g-unit .g-unit .g-tpl-67-33 .g-unit,.g-unit .g
-unit .g-unit .g-unit .g-unit .g-tpl-67-33 .g-unit{width:32.999%;float:right;dis
play:inline;margin:0}.g-tpl-67-33 .g-first,.g-unit .g-tpl-67-33 .g-first,.g-unit
.g-unit .g-tpl-67-33 .g-first,.g-unit .g-unit .g-unit .g-tpl-67-33 .g-first,.g-
unit .g-unit .g-unit .g-unit .g-tpl-67-33 .g-first,.g-unit .g-unit .g-unit .g-un
it .g-unit .g-tpl-67-33 .g-first{width:66.999%;float:left;display:inline;margin:
0}.g-tpl-50-50 .g-unit,.g-unit .g-tpl-50-50 .g-unit,.g-unit .g-unit .g-tpl-50-50
.g-unit,.g-unit .g-unit .g-unit .g-tpl-50-50 .g-unit,.g-unit .g-unit .g-unit .g
-unit .g-tpl-50-50 .g-unit,.g-unit .g-unit .g-unit .g-unit .g-unit .g-tpl-50-50
.g-unit{width:49.999%;float:right;display:inline;margin:0}.g-tpl-50-50 .g-first,
.g-unit .g-tpl-50-50 .g-first,.g-unit .g-unit .g-tpl-50-50 .g-first,.g-unit .g-u
nit .g-unit .g-tpl-50-50 .g-first,.g-unit .g-unit .g-unit .g-unit .g-tpl-50-50 .
g-first,.g-unit .g-unit .g-unit .g-unit .g-unit .g-tpl-50-50 .g-first{width:49.9
99%;float:left;display:inline;margin:0}.g-tpl-nest .g-unit{float:left;width:auto
;display:inline;margin:0}.g-tpl-nest-alt .g-unit{float:right;width:auto;display:
inline;margin:0}.g-content{margin-right:30px}.g-last .g-content{margin-right:0}@
media only screen and (max-width: 580px){.g-unit.g-unit{float:none !important}.g
-content{margin-right:0}}*{padding:0;margin:0;-webkit-box-sizing:border-box;-moz
-box-sizing:border-box;box-sizing:border-box}html,body{overflow-x:hidden;overflo
w-y:auto}img{max-width:100%}#gc-container{max-width:870px;margin:auto;width:90%}
#gc-pagecontent>.g-section{margin:40px 0}main{margin-bottom:50px;position:relati
ve}footer[role="contentinfo"]{padding:40px 0 50px}@media only screen and (max-wi
dth: 580px){#gc-container{width:auto}#gc-pagecontent{margin:auto;width:90%}#gc-p
agecontent>.g-section{margin:20px 0}footer[role="contentinfo"]{padding:20px 30px
}}@media only screen and (min-width: 581px) and (max-width: 990px){#gc-container
{width:95%}}figure{margin:20px 0}figure img{border:1px solid #dbdbdb}table{width
:100%;border-collapse:collapse;margin:2em 0;line-height:1.5em}table caption{marg
in-bottom:1em;text-align:left;font-weight:bold}th{border:1px solid #dbdbdb;font-
weight:bold;background:#e8e8e8}tr{border-bottom:1px solid #dbdbdb}table+tr{borde
r-top:1px solid #dbdbdb}td,th{padding:1em 1.5em;text-align:left;border:1px solid
#dbdbdb}pre{background-color:#f7f7f7;box-shadow:0 2px 4px rgba(0,0,0,0.15),0 0
3px rgba(0,0,0,0.15);margin:1em 0 0 0;overflow:auto;padding:.99em;position:relat
ive}pre a{text-decoration:underline !important}pre b{background:yellow}.element-
invisible{position:absolute !important;height:1px;width:1px;overflow:hidden;clip
:rect(1px 1px 1px 1px);clip:rect(1px, 1px, 1px, 1px)}.hidden{display:none}.label
{color:inherit;text-transform:uppercase;margin-bottom:5px;font-size:11.2px;font-
weight:bold}.published{font-size:11.2px;font-style:italic;color:#bebebe;line-hei
ght:16.8px}.description{margin:20px 0}.description:last-child{margin-bottom:0}.s
pan-full{background:#f5f5f5;position:relative;padding:3em 0}.span-full::before,.
span-full::after{content:'';height:100%;width:100%;top:0;position:absolute;backg
round:#f5f5f5;z-index:-1}.span-full::before{left:-100%}.span-full::after{left:10
0%}.button{background:#0370ea;background-image:-webkit-gradient(linear, 50% 0%,
50% 100%, color-stop(0%, #008dfd), color-stop(100%, #0370ea));background-image:-
webkit-linear-gradient(top, #008dfd 0%,#0370ea 100%);background-image:-moz-linea
r-gradient(top, #008dfd 0%,#0370ea 100%);background-image:-o-linear-gradient(top
, #008dfd 0%,#0370ea 100%);background-image:linear-gradient(top, #008dfd 0%,#037
0ea 100%);border:1px solid #076bd2;border-radius:3px;color:#fff !important;displ
ay:inline-block;font-size:13px;font-weight:700;line-height:1.3;padding:5px 20px;
text-align:center;text-decoration:none !important;text-shadow:1px 1px 1px #076bd
2}.button:hover{background-image:-webkit-gradient(linear, 50% 0%, 50% 100%, colo
r-stop(30%, #008dfd), color-stop(100%, #0370ea));background-image:-webkit-linear
-gradient(top, #008dfd 30%,#0370ea 100%);background-image:-moz-linear-gradient(t
op, #008dfd 30%,#0370ea 100%);background-image:-o-linear-gradient(top, #008dfd 3
0%,#0370ea 100%);background-image:linear-gradient(top, #008dfd 30%,#0370ea 100%)
;cursor:pointer}.button a{color:inherit !important}.button-alt{background:#eee;b
ackground-image:-webkit-gradient(linear, 50% 100%, 50% 0%, color-stop(46%, #dcdc
dc), color-stop(87%, #fafafa));background-image:-webkit-linear-gradient(bottom,
#dcdcdc 46%,#fafafa 87%);background-image:-moz-linear-gradient(bottom, #dcdcdc 4
6%,#fafafa 87%);background-image:-o-linear-gradient(bottom, #dcdcdc 46%,#fafafa
87%);background-image:linear-gradient(bottom, #dcdcdc 46%,#fafafa 87%);border:1p
x solid #d6d6d6;border-radius:3px;color:#333 !important;display:inline-block;fon
t-size:12px;font-weight:700;line-height:24px;padding:0 15px;text-align:center;te
xt-decoration:none !important;text-shadow:none}.button-alt:hover{background-imag
e:-webkit-gradient(linear, 50% 100%, 50% 0%, color-stop(20%, #dcdcdc), color-sto
p(87%, #fafafa));background-image:-webkit-linear-gradient(bottom, #dcdcdc 20%,#f
afafa 87%);background-image:-moz-linear-gradient(bottom, #dcdcdc 20%,#fafafa 87%
);background-image:-o-linear-gradient(bottom, #dcdcdc 20%,#fafafa 87%);backgroun
d-image:linear-gradient(bottom, #dcdcdc 20%,#fafafa 87%);cursor:pointer}.google-
button{background-color:#f5f5f5;border-radius:2px 0 0 0;border:1px solid rgba(0,
0,0,0.1);padding:5px 12px;text-align:center;white-space:nowrap}.google-button:ho
ver{border-color:#c6c6c6;-webkit-box-shadow:0 -1px 1px rgba(0,0,0,0.1);-moz-box-
shadow:0 -1px 1px rgba(0,0,0,0.1);box-shadow:0 -1px 1px rgba(0,0,0,0.1)}.google-
button:active{background-color:#f1f1f1;-webkit-box-shadow:inset 0 0px 2px rgba(0
,0,0,0.2);-moz-box-shadow:inset 0 0px 2px rgba(0,0,0,0.2);box-shadow:inset 0 0px
2px rgba(0,0,0,0.2)}.screenshot,.screenshot img{margin:1em 0}p.note,p.caution,p
.warning,div.note,div.caution,div.warning,aside.note,aside.caution,aside.warning
{background-color:#f5f5f5;border-bottom:1px solid;border-top:1px solid;overflow:
hidden;width:85%;margin:auto;padding:1em}p.note,div.note,aside.note{border-color
:#36C}p.caution,div.caution,aside.caution{border-color:#FC3}p.warning,div.warnin
g,aside.warning{border-color:#A03}p.warning em,p.warning strong,div.warning em,d
iv.warning strong,aside.warning em,aside.warning strong{color:#A03}.permalink{di
splay:none;margin-left:5px}.has-permalink:hover .permalink{display:initial}.no-p
ermalink .permalink{display:none !important}#gc-footer .links a{margin-right:20p
x}#gc-footer #cc-info{font-size:11.2px}#social-buttons{display:-webkit-box;displ
ay:-webkit-flex;display:-moz-flex;display:-ms-flex;display:-o-flex;display:flex;
-webkit-box-pack:1;-webkit-justify-content:flex-end;-moz-justify-content:flex-en
d;-ms-justify-content:flex-end;-o-justify-content:flex-end;justify-content:flex-
end;-webkit-box-align:center;-webkit-align-items:center;-moz-align-items:center;
-ms-align-items:center;-o-align-items:center;align-items:center}#social-buttons>
*{margin-left:10px}#social-buttons img{margin:-4px 0 0 1px}@media only screen an
d (max-width: 580px){.more-section .g-last .g-content{padding-bottom:0;border:no
ne}.more-section .g-content{border:1px solid #dbdbdb;border-width:0 0 1px 0;padd
ing-bottom:20px;margin-bottom:20px}#gc-footer .links a{display:inline-block}}#sc
roll-to-top,#send-feedback{border-bottom:none;bottom:0;position:fixed;z-index:5}
#scroll-to-top{border-left:0;left:0}#send-feedback{border-right:0;right:0}html{f
ont-family:"Open Sans",Arial,"Lucida Grande",sans-serif;color:#777}body{font-siz
e:13px;color:#777}h1,h2,h3,h4,h5,h6{font-family:"Open Sans",Arial,"Lucida Grande
",sans-serif;font-weight:600;color:#000}h1,h2{font-weight:300}h1{font-size:2.625
em;line-height:1.14286em}h1+h1{margin-top:0em}h2{font-size:1.875em;line-height:1
.6em;margin-top:1.6em;margin-bottom:0em;line-height:1.12em}h3{font-size:1.125em;
line-height:1.33333em;margin-top:1.33333em;margin-bottom:0.53333em;line-height:1
.12em}h4{font-size:1.1em;line-height:1.36364em;margin-top:0em;margin-bottom:0em}
h5{font-size:1em;line-height:1.5em;margin-top:0em;margin-bottom:0em}h6{font-size
:1em;line-height:1.5em;margin-top:0em;margin-bottom:0em}p{margin:1.5em 0}p.noind
ent,p.caption p{text-indent:0}p.caption{text-align:left}.lightbox p.caption{colo
r:#fff}a,a:link,a:visited{color:#39c;font-weight:bold;text-decoration:none;word-
wrap:break-word;transition:opacity 0.3s ease 0s}a:hover,a:focus,a:link:hover,a:l
ink:focus,a:visited:hover,a:visited:focus{color:#39f}a.section-anchor{display:bl
ock;padding-top:3.33em}footer[role="contentinfo"]{font-size:0.84615385em}footer[
role="contentinfo"] a,footer[role="contentinfo"] a:link,footer[role="contentinfo
"] a:visited{color:#999;font-weight:normal;font-weight:600;text-decoration:none;
word-wrap:break-word}footer[role="contentinfo"] a:hover,footer[role="contentinfo
"] a:focus,footer[role="contentinfo"] a:link:hover,footer[role="contentinfo"] a:
link:focus,footer[role="contentinfo"] a:visited:hover,footer[role="contentinfo"]
a:visited:focus{color:#39f}img{vertical-align:middle}figcaption{font-family:"Op
en Sans",Arial,"Lucida Grande",sans-serif;color:#aaa}blockquote{margin:0.75em 0.
8em}cite{margin:0.75em 0.8em;color:#c3c3c3;font-style:normal}canvas{background:#
fff;margin:1.5em 0}.code,code,pre{color:#080;font-family:"Source Code Pro",sans-
serif}pre{margin:2em 0;word-wrap:break-word;position:relative}pre[data-filename]
::after{content:attr(data-filename);background-color:#aaa;color:#fff;padding:2px
12px;position:absolute;right:0;top:0}pre a{text-decoration:underline}.static-co
de-container{line-height:1em;clear:both}code,kbd,samp{margin:1.5em 0;line-height
:1em}dl,menu,ol,ul,.item-list ul{margin:0.8em 0}ul{padding-left:1.28em}ol{paddin
g-left:1.52em}hr{height:1px;border:0;border-bottom:1px solid #dbdbdb;padding-bot
tom:-1px;margin:1.5em 0}.capitalize{text-transform:uppercase}[data-list-item]{di
splay:list-item}.uncapitalize::first-letter{text-transform:lowercase}.capitalize
::first-letter{text-transform:uppercase}.kbd{background-color:#f7f7f7;border:1px
solid #ccc;color:#333;font-size:11px;line-height:1.4;text-shadow:0 1px 0 #fff;f
ont-family:Arial,Helvetica,sans-serif;display:inline-block;padding:0.1em 0.6em;m
argin:0 0.1em;white-space:nowrap;-webkit-box-shadow:0 1px 0px rgba(0,0,0,0.2),0
0 0 2px #fff inset;-moz-box-shadow:0 1px 0px rgba(0,0,0,0.2),0 0 0 2px #fff inse
t;box-shadow:0 1px 0px rgba(0,0,0,0.2),0 0 0 2px #fff inset;-webkit-border-radiu
s:3px;-moz-border-radius:3px;border-radius:3px}#topnav{display:-webkit-box;displ
ay:-webkit-flex;display:-moz-flex;display:-ms-flex;display:-o-flex;display:flex;
-webkit-box-align:center;-webkit-align-items:center;-moz-align-items:center;-ms-
align-items:center;-o-align-items:center;align-items:center;height:64px;position
:relative}#logo{display:-webkit-box;display:-webkit-flex;display:-moz-flex;displ
ay:-ms-flex;display:-o-flex;display:flex;-webkit-box-align:center;-webkit-align-
items:center;-moz-align-items:center;-ms-align-items:center;-o-align-items:cente
r;align-items:center;-webkit-user-select:none;-moz-user-select:none;-o-user-sele
ct:none;-ms-user-select:none;user-select:none}#logo a{display:-webkit-box;displa
y:-webkit-flex;display:-moz-flex;display:-ms-flex;display:-o-flex;display:flex;-
webkit-box-align:center;-webkit-align-items:center;-moz-align-items:center;-ms-a
lign-items:center;-o-align-items:center;align-items:center;color:#828282;font-si
ze:2em;font-weight:400;letter-spacing:-1px}#logo a img{margin-bottom:-4px;height
:40px;width:123px}#logo .collase-icon{display:none;background:url("../../images/
burger-icon.png") 50% 100% no-repeat;background-size:cover;width:20px;height:20p
x}#logo .collase-icon.active{background-position:50% 0}#fatnav{height:100%;displ
ay:-webkit-box;display:-webkit-flex;display:-moz-flex;display:-ms-flex;display:-
o-flex;display:flex;-webkit-box-pack:1;-webkit-justify-content:flex-end;-moz-jus
tify-content:flex-end;-ms-justify-content:flex-end;-o-justify-content:flex-end;j
ustify-content:flex-end;-webkit-box-flex:1;-webkit-flex:1;-moz-flex:1;-ms-flex:1
;-o-flex:1;flex:1;white-space:nowrap}#fatnav li{list-style:none}#fatnav>ul{displ
ay:-webkit-box;display:-webkit-flex;display:-moz-flex;display:-ms-flex;display:-
o-flex;display:flex;padding:0;margin:0}#fatnav .toplevel{color:#aaa;font-weight:
600;text-transform:uppercase;-webkit-user-select:none;-moz-user-select:none;-o-u
ser-select:none;-ms-user-select:none;user-select:none}#fatnav .toplevel::after{c
ontent:'';background:url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA4AAAAOC
AYAAAAfSC3RAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAPJJREFUeNpiyc/Pn
8XAwDATiM8yEAaMQBwBxHxMQMIdiE8D8Vog1sGjyQGqbhkQK4A0PoKaFATEF4F4MRCrImnQBuJtQLwfi
I2hYk9AGl2AuB2I/wAxiB8DxNeAeA4QzwXiS0DsCdXwHIj9gHgqSOFPIK4CYksgvgJVwALEyUCcBDWMA
eoSkO2bGZAEQeAM1CmtUNth4BkQ+wJxHBC/hwkyoQXALyCuAWILIL4MxIugAbYFI3iNZ54BR4fNtcXo0
QEy9B+ywBGtWMzoAAquBWLk6EDXhBIdLNDokINGRwBQAUiiCYhvI0VHN1LIjpjoAAgwAMoSTlKlzAY4A
AAAAElFTkSuQmCC) no-repeat;background-size:9px;display:inline-block;height:5px;w
idth:14px;margin-left:10px;margin-bottom:2px}#fatnav .pillar{display:-webkit-box
;display:-webkit-flex;display:-moz-flex;display:-ms-flex;display:-o-flex;display
:flex;-webkit-box-align:center;-webkit-align-items:center;-moz-align-items:cente
r;-ms-align-items:center;-o-align-items:center;align-items:center;padding:0 20px
;cursor:pointer;z-index:1002}#fatnav .expandee{display:none;position:absolute;z-
index:1001;left:0;width:100%;-webkit-box-sizing:border-box;-moz-box-sizing:borde
r-box;box-sizing:border-box;background-color:#f5f5f5;padding:20px 0;cursor:initi
al;margin:0}#fatnav .expandee a{font-weight:600;padding:0.5em 0;display:block;co
lor:#828282}#fatnav .expandee a:hover{background-image:-webkit-linear-gradient(2
05deg, rgba(229,229,229,0.7) 0%,rgba(233,233,233,0.7) 20%,rgba(244,244,244,0.7)
100%);background-image:-moz-linear-gradient(205deg, rgba(229,229,229,0.7) 0%,rgb
a(233,233,233,0.7) 20%,rgba(244,244,244,0.7) 100%);background-image:-o-linear-gr
adient(205deg, rgba(229,229,229,0.7) 0%,rgba(233,233,233,0.7) 20%,rgba(244,244,2
44,0.7) 100%);background-image:linear-gradient(205deg, rgba(229,229,229,0.7) 0%,
rgba(233,233,233,0.7) 20%,rgba(244,244,244,0.7) 100%)}#fatnav .expandee li{white
-space:nowrap}#fatnav .expandee li.submenu{color:#333;font-size:1.1em;font-weigh
t:bold;cursor:pointer;-webkit-box-flex:1;-webkit-flex:1;-moz-flex:1;-ms-flex:1;-
o-flex:1;flex:1}#fatnav .expandee li.submenu.active{background-image:-webkit-lin
ear-gradient(205deg, rgba(229,229,229,0.7) 0%,rgba(233,233,233,0.7) 20%,rgba(244
,244,244,0.7) 100%);background-image:-moz-linear-gradient(205deg, rgba(229,229,2
29,0.7) 0%,rgba(233,233,233,0.7) 20%,rgba(244,244,244,0.7) 100%);background-imag
e:-o-linear-gradient(205deg, rgba(229,229,229,0.7) 0%,rgba(233,233,233,0.7) 20%,
rgba(244,244,244,0.7) 100%);background-image:linear-gradient(205deg, rgba(229,22
9,229,0.7) 0%,rgba(233,233,233,0.7) 20%,rgba(244,244,244,0.7) 100%)}#fatnav .exp
andee li.submenu>ul{font-size:0.8em;padding:15px 0 0 0;margin:0}#fatnav .expande
e li.submenu .category{border-bottom:1px solid #e8e8e8}#fatnav .expandee li.subm
enu .category:last-child{border:none}#fatnav .expandee li.submenu .category a{ov
erflow:hidden;text-overflow:ellipsis}#fatnav .expandee li.submenu .category>ul{d
isplay:none}#fatnav .expandee li.submenu .category ul{padding:0}#search{display:
-webkit-inline-flex;display:-moz-inline-flex;display:-ms-inline-flex;display:-o-
inline-flex;display:inline-flex;-webkit-align-self:stretch;-moz-align-self:stret
ch;-ms-align-self:stretch;-o-align-self:stretch;align-self:stretch;-webkit-box-a
lign:center;-webkit-align-items:center;-moz-align-items:center;-ms-align-items:c
enter;-o-align-items:center;align-items:center;width:auto;padding:0 20px;cursor:
pointer}#search img{height:16px;width:16px;-webkit-user-select:none;-moz-user-se
lect:none;-o-user-select:none;-ms-user-select:none;user-select:none}#search .exp
andee{padding:20px}#search .expandee input[type="search"]{width:100%;-webkit-box
-sizing:border-box;-moz-box-sizing:border-box;box-sizing:border-box;background:u
rl("../../images/search.png") no-repeat 15px 55%;background-size:20px;background
-color:white;border:1px solid #dbdbdb;padding:10px 10px 10px 40px;font-size:1.4e
m;-webkit-box-flex:1;-webkit-flex:1;-moz-flex:1;-ms-flex:1;-o-flex:1;flex:1;font
-family:inherit;font-weight:300}@media only screen and (min-width: 580px){#topna
v{padding:15px 0 0}#fatnav .pillar.active{background:#f5f5f5 url(data:image/png;
base64,iVBORw0KGgoAAAANSUhEUgAAAAYAAAAyCAMAAABI+VrBAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZ
SBJbWFnZVJlYWR5ccllPAAAALFQTFRF/////f39/v7+/Pz8+/v7+fn56+vr+vr69PT09vb28/Pz9fX1x
cXF9/f3+Pj45+fn8PDwycnJ7+/v6enpzc3N19fX8fHx8vLy7u7u6Ojo7Ozs3Nzc5OTk7e3t4uLi2dnZ3
9/fxsbG29vb0dHR3d3d4ODg4+Pj6urqyMjI09PT5eXl0NDQ1dXV2NjYysrKx8fH5ubmzs7O3t7exMTE4
eHh2tray8vLz8/PzMzM1NTU1tbWhgtdWwAAAOFJREFUeNok0NWSxCAURdFDhCQkMx3tuLe7jP//h829N
C+rqIKNAK8hhGEQjmUyrm+ziVTs50O6jkA6b+J3gSCqpWfiGZxL1yKyhbIQEDQLxj7xTYy7SXoCY1RXb
wLXy6OgfdevIbYFdulHaBuI7t3SIY5Nbhm4zAdF/Ow5gvTEEaR/W49Ov2eSIvjuW+Y4tdTCXHML+1XI/
A7cwmmdM1nHLZwbl+kPPj9lunELq5LuRWy5hUFyC+uKI+hazabgCJpYcws5gsXS5F8qc02i9C9Jn9eje
lHoMkJdhrJ5xb8AAwBmihB0TS21nQAAAABJRU5ErkJggg==) no-repeat right 0}#fatnav .pill
ar.active .toplevel::after{background-position:0% -5px}#fatnav .pillar.active .e
xpandee{display:-webkit-box;display:-webkit-flex;display:-moz-flex;display:-ms-f
lex;display:-o-flex;display:flex;-webkit-box-orient:vertical;-webkit-flex-direct
ion:row;-moz-flex-direction:row;-ms-flex-direction:row;-o-flex-direction:row;fle
x-direction:row}#fatnav .pillar.active .expandee::after{position:absolute;backgr
ound-image:-webkit-gradient(linear, 50% 100%, 50% 0%, color-stop(0%, rgba(255,25
5,255,0)), color-stop(25%, rgba(211,211,211,0.5)), color-stop(50%, #d3d3d3), col
or-stop(75%, rgba(211,211,211,0.5)), color-stop(100%, rgba(255,255,255,0)));back
ground-image:-webkit-linear-gradient(bottom, rgba(255,255,255,0) 0%,rgba(211,211
,211,0.5) 25%,#d3d3d3 50%,rgba(211,211,211,0.5) 75%,rgba(255,255,255,0) 100%);ba
ckground-image:-moz-linear-gradient(bottom, rgba(255,255,255,0) 0%,rgba(211,211,
211,0.5) 25%,#d3d3d3 50%,rgba(211,211,211,0.5) 75%,rgba(255,255,255,0) 100%);bac
kground-image:-o-linear-gradient(bottom, rgba(255,255,255,0) 0%,rgba(211,211,211
,0.5) 25%,#d3d3d3 50%,rgba(211,211,211,0.5) 75%,rgba(255,255,255,0) 100%);backgr
ound-image:linear-gradient(bottom, rgba(255,255,255,0) 0%,rgba(211,211,211,0.5)
25%,#d3d3d3 50%,rgba(211,211,211,0.5) 75%,rgba(255,255,255,0) 100%);right:0;top:
0;content:'';width:1px !important;height:100%}#fatnav .pillar .expandee{min-heig
ht:400px;font-size:0.9em;box-shadow:0 3px 4px rgba(0,0,0,0.12);top:64px}#fatnav
.pillar .expandee .submenu{padding:0 20px;border-right:1px solid #e8e8e8}#fatnav
.pillar .expandee .submenu:last-child{border:none}#search{margin-right:-4px}#se
arch.active{background:#f5f5f5 url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgA
AAAYAAAAyCAMAAABI+VrBAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAALFQTFR
F/////f39/v7+/Pz8+/v7+fn56+vr+vr69PT09vb28/Pz9fX1xcXF9/f3+Pj45+fn8PDwycnJ7+/v6en
pzc3N19fX8fHx8vLy7u7u6Ojo7Ozs3Nzc5OTk7e3t4uLi2dnZ39/fxsbG29vb0dHR3d3d4ODg4+Pj6ur
qyMjI09PT5eXl0NDQ1dXV2NjYysrKx8fH5ubmzs7O3t7exMTE4eHh2tray8vLz8/PzMzM1NTU1tbWhgt
dWwAAAOFJREFUeNok0NWSxCAURdFDhCQkMx3tuLe7jP//h829NC+rqIKNAK8hhGEQjmUyrm+ziVTs50O
6jkA6b+J3gSCqpWfiGZxL1yKyhbIQEDQLxj7xTYy7SXoCY1RXbwLXy6OgfdevIbYFdulHaBuI7t3SIY5
Nbhm4zAdF/Ow5gvTEEaR/W49Ov2eSIvjuW+Y4tdTCXHML+1XI/A7cwmmdM1nHLZwbl+kPPj9lunELq5L
uRWy5hUFyC+uKI+hazabgCJpYcws5gsXS5F8qc02i9C9Jn9ejelHoMkJdhrJ5xb8AAwBmihB0TS21nQA
AAABJRU5ErkJggg==) no-repeat right 0}#search.active .expandee{display:block;top:
64px}}@media only screen and (max-width: 580px){#topnav{-webkit-box-orient:verti
cal;-webkit-flex-direction:column;-moz-flex-direction:column;-ms-flex-direction:
column;-o-flex-direction:column;flex-direction:column;height:auto}#fatnav{width:
100%;max-height:0;overflow:hidden;background:#f5f5f5}#fatnav.active{max-height:5
000px}#fatnav>ul{-webkit-box-flex:1;-webkit-flex:1;-moz-flex:1;-ms-flex:1;-o-fle
x:1;flex:1;-webkit-box-orient:vertical;-webkit-flex-direction:column;-moz-flex-d
irection:column;-ms-flex-direction:column;-o-flex-direction:column;flex-directio
n:column}#fatnav .toplevel{width:100%;height:50px;-webkit-box-align:center;-webk
it-align-items:center;-moz-align-items:center;-ms-align-items:center;-o-align-it
ems:center;align-items:center;-webkit-box-pack:1;-webkit-justify-content:center;
-moz-justify-content:center;-ms-justify-content:center;-o-justify-content:center
;justify-content:center;display:-webkit-inline-flex;display:-moz-inline-flex;dis
play:-ms-inline-flex;display:-o-inline-flex;display:inline-flex}#fatnav .pillar{
-webkit-box-orient:vertical;-webkit-flex-direction:column;-moz-flex-direction:co
lumn;-ms-flex-direction:column;-o-flex-direction:column;flex-direction:column;pa
dding:0;border-bottom:1px solid #dbdbdb}#fatnav .pillar.active .expandee{display
:initial}#fatnav .expandee{position:relative;padding:0;background-color:rgba(229
,229,229,0.7)}#fatnav .expandee li.submenu{padding:10px 15px}#fatnav .expandee l
i.submenu:not(:last-child){border-color:#ccc}#fatnav .expandee li.submenu>ul{bac
kground-color:inherit}#logo{height:50px;width:90%}#logo a{-webkit-box-flex:1;-we
bkit-flex:1;-moz-flex:1;-ms-flex:1;-o-flex:1;flex:1}#logo .collase-icon{display:
initial}#search{display:-webkit-box;display:-webkit-flex;display:-moz-flex;displ
ay:-ms-flex;display:-o-flex;display:flex;-webkit-box-align:center;-webkit-align-
items:center;-moz-align-items:center;-ms-align-items:center;-o-align-items:cente
r;align-items:center;-webkit-box-ordinal-group:-1;-webkit-order:-1;-moz-order:-1
;-ms-order:-1;-o-order:-1;order:-1;padding:15px 15px 0 15px}#search img{display:
none}#search .expandee{display:block}}#gc-pagecontent .g-section h1,#gc-pagecont
ent .g-section h2,#gc-pagecontent .g-section h3{margin:0}#upcoming-events .scree
nshot,#featured .screenshot{margin-top:0}#upcoming-events article{border:1px sol
id #dbdbdb;border-width:0 0 1px 0;padding:20px 0}#upcoming-events article:first-
child{padding-top:0}#upcoming-events article:last-child{padding-bottom:0;border:
none}#site-sections{background-color:#f5f5f5;padding:20px;text-align:center}#sit
e-sections h2{padding-top:20px}#site-sections h2::before{display:block;content:'
';background:url("../../images/bucket-icons.png") 12px 50% no-repeat;width:100px
;height:65px;background-size:cover;margin:auto;margin-bottom:20px}#site-sections
h2.multidevice::before{background-position:-91px 50%}#site-sections h2.platform
::before{background-position:-194px 50%}#developer-news{margin-top:4em}#develope
r-news .g-content{margin-right:20px}#developer-news h1{margin-bottom:40px !impor
tant}@media only screen and (min-width: 580px){#featured{padding-right:30px;padd
ing-bottom:10px;border:1px solid #dbdbdb;border-width:0 1px 0 0}#featured img{ma
rgin-bottom:20px}}.pillar-content h1{font-size:42px}.pillar-content>.g-section{p
adding:3em 0}.pillar-content>.g-section:not(:last-of-type){border-bottom:1px sol
id #dbdbdb}.pillar-content>.g-section>h2{font-size:30px;margin-bottom:1.5em !imp
ortant}.pillar-content .article-list article{position:relative;overflow:hidden;w
idth:100%;padding:1.9em;background-color:#f5f5f5;box-shadow:0 2px 4px rgba(0,0,0
,0.15),0 0 3px rgba(0,0,0,0.15);line-height:1.5em;margin-bottom:1.5em}.pillar-co
ntent .article-list article.new::after{content:'new';background:#2e82c9;position
:absolute;-webkit-transform:rotate(45deg);-moz-transform:rotate(45deg);-ms-trans
form:rotate(45deg);-o-transform:rotate(45deg);transform:rotate(45deg);top:-4px;r
ight:-20px;color:white;font-size:0.9em;width:60px;text-align:center;padding-top:
8px}.pillar-content .article-list article p{font-weight:300}.pillar-content #fur
ther-resources .g-content h2::before{display:inline-block;content:'';background:
url("../../images/further-resources-icons.svg") 0 50% no-repeat;width:50px;heigh
t:43px;background-size:cover;margin:auto;margin-bottom:5px;vertical-align:middle
}.pillar-content #further-resources .g-content h2.school::before{background-posi
tion:0 50%}.pillar-content #further-resources .g-content h2.chat::before{backgro
und-position:-54px 50%}.pillar-content #further-resources .g-content h2.puzzle::
before{background-position:-108px 50%}@media only screen and (max-width: 580px){
.pillar-content>.g-section{padding:2em 0}}@media only screen and (min-width: 580
px){.pillar-content .article-list{display:-webkit-box;display:-webkit-flex;displ
ay:-moz-flex;display:-ms-flex;display:-o-flex;display:flex;-webkit-flex-wrap:wra
p;-moz-flex-wrap:wrap;-ms-flex-wrap:wrap;-o-flex-wrap:wrap;flex-wrap:wrap;-webki
t-box-pack:1;-webkit-justify-content:space-between;-moz-justify-content:space-be
tween;-ms-justify-content:space-between;-o-justify-content:space-between;justify
-content:space-between;-webkit-box-align:stretch;-webkit-align-items:stretch;-mo
z-align-items:stretch;-ms-align-items:stretch;-o-align-items:stretch;align-items
:stretch}.pillar-content .article-list article{-webkit-box-flex:auto;-webkit-fle
x:auto;-moz-flex:auto;-ms-flex:auto;-o-flex:auto;flex:auto;margin-right:1.5em;wi
dth:45%}.pillar-content .article-list article:nth-child(2n),.pillar-content .art
icle-list article:last-of-type{margin-right:0}}@media only screen and (min-width
: 990px){.pillar-content .article-list article{width:30%}.pillar-content .articl
e-list article:nth-child(2n){margin-right:1.5em}.pillar-content .article-list ar
ticle:nth-child(3n),.pillar-content .article-list article:last-of-type{margin-ri
ght:0}}@supports not (flex-wrap: wrap){.pillar-content .article-list{display:blo
ck}@media only screen and (min-width: 580px){.pillar-content .article-list artic
le{flex:none;float:left;width:48%}}@media only screen and (min-width: 990px){.pi
llar-content .article-list article{width:31.8058%}}}.load-more-articles{overflow
:hidden;*zoom:1;margin:2em auto 0.3em;text-align:center;width:100%}.load-more-ar
ticles a,.load-more-articles a:hover{color:#000;transition:opacity 0.3s ease 0s}
.nav-arrow{background-size:48px 48px;background:top center no-repeat;display:inl
ine-block;opacity:0.5;transition:opacity 0.3s ease 0s;padding-top:50px}.nav-arro
w:hover{opacity:1}.down-arrow{background-image:url("../../images/down-arrow.png"
)}.inline-toc{line-height:1.3em}.inline-toc a,.inline-toc a:link,.inline-toc a:v
isited{color:#aaa;font-weight:normal}.inline-toc a:hover,.inline-toc a:focus,.in
line-toc a:link:hover,.inline-toc a:link:focus,.inline-toc a:visited:hover,.inli
ne-toc a:visited:focus{color:#000}.inline-toc li li a,.inline-toc li li a:link,.
inline-toc li li a:visited{color:#aaa}.inline-toc li li a:hover,.inline-toc li l
i a:focus,.inline-toc li li a:link:hover,.inline-toc li li a:link:focus,.inline-
toc li li a:visited:hover,.inline-toc li li a:visited:focus{color:#000}.inline-t
oc a{display:-webkit-box;display:-webkit-flex;display:-moz-flex;display:-ms-flex
;display:-o-flex;display:flex;padding:0.5em 0}.inline-toc .related{display:block
}.inline-toc .related li a.active{color:#000}.inline-toc #toc{display:none}.inli
ne-toc #toc .toplevel>a{font-weight:bold;color:#000}.inline-toc #toc .toplevel>a
.hastoc::after{content:'+';-webkit-box-flex:1;-webkit-flex:1;-moz-flex:1;-ms-fle
x:1;-o-flex:1;flex:1;text-align:right}.inline-toc #toc .toplevel.active .toc{dis
play:block}.inline-toc #toc .toplevel.active>a.hastoc::after{content:'-'}.inline
-toc .toc{margin:0;padding:0;border-top:1px solid #dbdbdb}.inline-toc .toc .toc{
display:none}.inline-toc .toc .toc li{padding-left:1em;border-bottom:1px solid #
dbdbdb}#cc-info{display:-webkit-box;display:-webkit-flex;display:-moz-flex;displ
ay:-ms-flex;display:-o-flex;display:flex;-webkit-box-align:center;-webkit-align-
items:center;-moz-align-items:center;-ms-align-items:center;-o-align-items:cente
r;align-items:center;font-style:italic;font-size:0.8em;color:#848484}#cc-info .c
c-logo img{width:90px;height:32px}#cc-info .last-updated{-webkit-box-flex:1;-web
kit-flex:1;-moz-flex:1;-ms-flex:1;-o-flex:1;flex:1}@media only screen and (min-w
idth: 580px){.inline-toc{position:absolute;top:0;left:50%;margin-left:195px;widt
h:240px;overflow:auto;overflow-x:hidden}.inline-toc.sticky{position:fixed}.inlin
e-toc #toc{display:block}.article-content{width:70%;padding-right:5%;border-righ
t:1px solid #f5f5f5}.cc-logo{margin:0 0 0 auto}}@media only screen and (min-widt
h: 581px) and (max-width: 990px){.inline-toc{width:200px;margin-left:165px}}@med
ia only screen and (max-width: 580px){.article-content [itemprop="articleBody"]>
.collapsible{height:58px;overflow:hidden}.article-content [itemprop="articleBody
"]>.collapsible.active{height:auto}.article-content [itemprop="articleBody"]>.co
llapsible.active h2::before{content:'-'}.article-content [itemprop="articleBody"
]>.collapsible h2{position:relative;margin:0;padding:15px 15px 15px 0;border-top
:1px solid #dbdbdb;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.ar
ticle-content [itemprop="articleBody"]>.collapsible h2::before{position:absolute
;right:0;content:'+'}.article-content [itemprop="articleBody"] .related{margin:2
0px 0}}.api{color:#333;font-size:14px}.api .api-summary td,.api .api-summary th{
padding:5px 10px}.api .api-reference .description{margin-left:20px}.api .api-ref
erence table.innerTable{margin:10px 0}.api .api-reference table.innerTable td,.a
pi .api-reference table.innerTable th{padding:5px 10px;border:1px solid #eee}.ap
i .api-reference table.innerTable th{background:none}.api .api-reference table.i
nnerTable p{margin:0}.api .api-reference td,.api .api-reference th{vertical-alig
n:top;border:1px solid #eee}.api .api-reference th{background:#fafafa}.api .api-
reference h2{background-color:#e8e8e8;padding:20px;margin-left:-20px;margin-righ
t:-20px}.api .api-reference h3{margin-top:3em} | 4 */article,aside,details,figcaption,figure,footer,header,hgroup,main,nav,section
,summary{display:block}audio,canvas,video{display:inline-block;*display:inline;*
zoom:1}audio:not([controls]){display:none;height:0}[hidden],template{display:non
e}html{font-family:sans-serif;font-size:100%;-ms-text-size-adjust:100%;-webkit-t
ext-size-adjust:100%}button,input,select,textarea{font-family:sans-serif}body{ma
rgin:0}a{background:transparent}a:focus{outline:thin dotted}a:active,a:hover{out
line:0}p,pre{margin:1.5em 0}blockquote{margin:1.5em 40px}h1{font-size:2em;line-h
eight:1.5em;margin-top:0.75em;margin-bottom:0.75em}h2{font-size:1.5em;line-heigh
t:2em;margin-top:1em;margin-bottom:1em}h3{font-size:1.17em;line-height:1.28205em
;margin-top:1.28205em;margin-bottom:1.28205em}h4{font-size:1em;line-height:1.5em
;margin-top:1.5em;margin-bottom:1.5em}h5{font-size:0.83em;line-height:1.80723em;
margin-top:1.80723em;margin-bottom:1.80723em}h6{font-size:0.67em;line-height:2.2
3881em;margin-top:2.23881em;margin-bottom:2.23881em}abbr[title]{border-bottom:1p
x dotted}b,strong{font-weight:bold}dfn{font-style:italic}hr{-webkit-box-sizing:c
ontent-box;-moz-box-sizing:content-box;box-sizing:content-box;height:0}mark{back
ground:#ff0;color:#000}code,kbd,pre,samp{font-family:monospace, serif;_font-fami
ly:'courier new', monospace;font-size:1em}pre{white-space:pre;white-space:pre-wr
ap;word-wrap:break-word}q{quotes:"\201C" "\201D" "\2018" "\2019"}small{font-size
:80%}sub,sup{font-size:75%;line-height:0;position:relative;vertical-align:baseli
ne}sup{top:-0.5em}sub{bottom:-0.25em}dl,menu,ol,ul{margin:1.5em 0}dd{margin:0 0
0 40px}menu,ol,ul{padding:0 0 0 40px}nav ul,nav ol{list-style:none;list-style-im
age:none}img{border:0;-ms-interpolation-mode:bicubic}svg:not(:root){overflow:hid
den}figure{margin:0}form{margin:0}fieldset{margin:0 2px;border-color:#c0c0c0;bor
der-top-style:solid;border-top-width:0.0625em;padding-top:0.4625em;border-bottom
-style:solid;border-bottom-width:0.0625em;padding-bottom:0.9125em;border-left-st
yle:solid;border-left-width:0.0625em;padding-left:0.875em;border-right-style:sol
id;border-right-width:0.0625em;padding-right:0.875em}legend{border:0;padding:0;*
margin-left:-7px}button,input,select,textarea{font-family:inherit;font-size:100%
;margin:0;vertical-align:baseline;*vertical-align:middle}button,input{line-heigh
t:normal}button,select{text-transform:none}button,html input[type="button"],inpu
t[type="reset"],input[type="submit"]{-webkit-appearance:button;cursor:pointer;*o
verflow:visible}button[disabled],html input[disabled]{cursor:default}input[type=
"checkbox"],input[type="radio"]{-webkit-box-sizing:border-box;-moz-box-sizing:bo
rder-box;box-sizing:border-box;padding:0;*height:13px;*width:13px}input[type="se
arch"]{-webkit-appearance:textfield;-webkit-box-sizing:content-box;-moz-box-sizi
ng:content-box;box-sizing:content-box}input[type="search"]::-webkit-search-cance
l-button,input[type="search"]::-webkit-search-decoration{-webkit-appearance:none
}button::-moz-focus-inner,input::-moz-focus-inner{border:0;padding:0}textarea{ov
erflow:auto;vertical-align:top}table{border-collapse:collapse;border-spacing:0}*
html{font-size:100%}html{font-size:16px;line-height:1.5em}* html{font-size:100%
}html{font-size:16px;line-height:1.5em}.g-section:after{content:".";display:bloc
k;height:0;clear:both;visibility:hidden}.g-unit .g-section:after{clear:none}.g-u
nit .g-section{width:100%;overflow:hidden}.g-section,.g-unit{zoom:1}.g-split>.g-
unit{float:right;text-align:right}.g-split>.g-first{float:left;text-align:left}.
g-tpl-160 .g-unit,.g-unit .g-tpl-160 .g-unit,.g-unit .g-unit .g-tpl-160 .g-unit,
.g-unit .g-unit .g-unit .g-tpl-160 .g-unit,.g-unit .g-unit .g-unit .g-unit .g-tp
l-160 .g-unit,.g-unit .g-unit .g-unit .g-unit .g-unit .g-tpl-160 .g-unit{display
:block;margin:0 0 0 160px;width:auto;float:none}.g-tpl-160 .g-first,.g-unit .g-t
pl-160 .g-first,.g-unit .g-unit .g-tpl-160 .g-first,.g-unit .g-unit .g-unit .g-t
pl-160 .g-first,.g-unit .g-unit .g-unit .g-unit .g-tpl-160 .g-first,.g-unit .g-u
nit .g-unit .g-unit .g-unit .g-tpl-160 .g-first{display:block;margin:0;width:160
px;float:left}.g-tpl-25-75 .g-unit,.g-unit .g-tpl-25-75 .g-unit,.g-unit .g-unit
.g-tpl-25-75 .g-unit,.g-unit .g-unit .g-unit .g-tpl-25-75 .g-unit,.g-unit .g-uni
t .g-unit .g-unit .g-tpl-25-75 .g-unit,.g-unit .g-unit .g-unit .g-unit .g-unit .
g-tpl-25-75 .g-unit{width:74.999%;float:right;display:inline;margin:0}.g-tpl-25-
75 .g-first,.g-unit .g-tpl-25-75 .g-first,.g-unit .g-unit .g-tpl-25-75 .g-first,
.g-unit .g-unit .g-unit .g-tpl-25-75 .g-first,.g-unit .g-unit .g-unit .g-unit .g
-tpl-25-75 .g-first,.g-unit .g-unit .g-unit .g-unit .g-unit .g-tpl-25-75 .g-firs
t{width:24.999%;float:left;display:inline;margin:0}.g-tpl-75-25 .g-unit,.g-unit
.g-tpl-75-25 .g-unit,.g-unit .g-unit .g-tpl-75-25 .g-unit,.g-unit .g-unit .g-uni
t .g-tpl-75-25 .g-unit,.g-unit .g-unit .g-unit .g-unit .g-tpl-75-25 .g-unit,.g-u
nit .g-unit .g-unit .g-unit .g-unit .g-tpl-75-25 .g-unit{width:24.999%;float:rig
ht;display:inline;margin:0}.g-tpl-75-25 .g-first,.g-unit .g-tpl-75-25 .g-first,.
g-unit .g-unit .g-tpl-75-25 .g-first,.g-unit .g-unit .g-unit .g-tpl-75-25 .g-fir
st,.g-unit .g-unit .g-unit .g-unit .g-tpl-75-25 .g-first,.g-unit .g-unit .g-unit
.g-unit .g-unit .g-tpl-75-25 .g-first{width:74.999%;float:left;display:inline;m
argin:0}.g-tpl-33-67 .g-unit,.g-unit .g-tpl-33-67 .g-unit,.g-unit .g-unit .g-tpl
-33-67 .g-unit,.g-unit .g-unit .g-unit .g-tpl-33-67 .g-unit,.g-unit .g-unit .g-u
nit .g-unit .g-tpl-33-67 .g-unit,.g-unit .g-unit .g-unit .g-unit .g-unit .g-tpl-
33-67 .g-unit{width:66.999%;float:right;display:inline;margin:0}.g-tpl-33-67 .g-
first,.g-unit .g-tpl-33-67 .g-first,.g-unit .g-unit .g-tpl-33-67 .g-first,.g-uni
t .g-unit .g-unit .g-tpl-33-67 .g-first,.g-unit .g-unit .g-unit .g-unit .g-tpl-3
3-67 .g-first,.g-unit .g-unit .g-unit .g-unit .g-unit .g-tpl-33-67 .g-first{widt
h:32.999%;float:left;display:inline;margin:0}.g-tpl-67-33 .g-unit,.g-unit .g-tpl
-67-33 .g-unit,.g-unit .g-unit .g-tpl-67-33 .g-unit,.g-unit .g-unit .g-unit .g-t
pl-67-33 .g-unit,.g-unit .g-unit .g-unit .g-unit .g-tpl-67-33 .g-unit,.g-unit .g
-unit .g-unit .g-unit .g-unit .g-tpl-67-33 .g-unit{width:32.999%;float:right;dis
play:inline;margin:0}.g-tpl-67-33 .g-first,.g-unit .g-tpl-67-33 .g-first,.g-unit
.g-unit .g-tpl-67-33 .g-first,.g-unit .g-unit .g-unit .g-tpl-67-33 .g-first,.g-
unit .g-unit .g-unit .g-unit .g-tpl-67-33 .g-first,.g-unit .g-unit .g-unit .g-un
it .g-unit .g-tpl-67-33 .g-first{width:66.999%;float:left;display:inline;margin:
0}.g-tpl-50-50 .g-unit,.g-unit .g-tpl-50-50 .g-unit,.g-unit .g-unit .g-tpl-50-50
.g-unit,.g-unit .g-unit .g-unit .g-tpl-50-50 .g-unit,.g-unit .g-unit .g-unit .g
-unit .g-tpl-50-50 .g-unit,.g-unit .g-unit .g-unit .g-unit .g-unit .g-tpl-50-50
.g-unit{width:49.999%;float:right;display:inline;margin:0}.g-tpl-50-50 .g-first,
.g-unit .g-tpl-50-50 .g-first,.g-unit .g-unit .g-tpl-50-50 .g-first,.g-unit .g-u
nit .g-unit .g-tpl-50-50 .g-first,.g-unit .g-unit .g-unit .g-unit .g-tpl-50-50 .
g-first,.g-unit .g-unit .g-unit .g-unit .g-unit .g-tpl-50-50 .g-first{width:49.9
99%;float:left;display:inline;margin:0}.g-tpl-nest .g-unit{float:left;width:auto
;display:inline;margin:0}.g-tpl-nest-alt .g-unit{float:right;width:auto;display:
inline;margin:0}.g-content{margin-right:30px}.g-last .g-content{margin-right:0}@
media only screen and (max-width: 580px){.g-unit.g-unit{float:none !important}.g
-content{margin-right:0}}*{padding:0;margin:0;-webkit-box-sizing:border-box;-moz
-box-sizing:border-box;box-sizing:border-box}html,body{overflow-x:hidden;overflo
w-y:auto}img{max-width:100%;height:auto}#gc-container{max-width:870px;margin:aut
o;width:90%}#gc-pagecontent>.g-section{margin:40px 0}main{margin-bottom:50px;pos
ition:relative}footer[role="contentinfo"]{padding:40px 0 50px}@media only screen
and (max-width: 580px){#gc-container{width:auto}#gc-pagecontent{margin:auto;wid
th:90%}#gc-pagecontent>.g-section{margin:20px 0}footer[role="contentinfo"]{paddi
ng:20px 30px}}@media only screen and (min-width: 581px) and (max-width: 990px){#
gc-container{width:95%}}figure{margin:20px 0}figure img{border:1px solid #dbdbdb
}table{width:100%;border-collapse:collapse;margin:2em 0;line-height:1.5em}table
caption{margin-bottom:1em;text-align:left;font-weight:bold}th{border:1px solid #
dbdbdb;font-weight:bold;background:#e8e8e8}tr{border-bottom:1px solid #dbdbdb}ta
ble+tr{border-top:1px solid #dbdbdb}td,th{padding:1em 1.5em;text-align:left;bord
er:1px solid #dbdbdb}pre{background-color:#f7f7f7;box-shadow:0 2px 4px rgba(0,0,
0,0.15),0 0 3px rgba(0,0,0,0.15);margin:1em 0 0 0;overflow:auto;padding:.99em;po
sition:relative}pre a{text-decoration:underline !important}pre b{background:yell
ow}.element-invisible{position:absolute !important;height:1px;width:1px;overflow
:hidden;clip:rect(1px 1px 1px 1px);clip:rect(1px, 1px, 1px, 1px)}.hidden{display
:none}.label{color:inherit;text-transform:uppercase;margin-bottom:5px;font-size:
11.2px;font-weight:bold}.published{font-size:11.2px;font-style:italic;color:#beb
ebe;line-height:16.8px}.description{margin:20px 0}.description:last-child{margin
-bottom:0}.span-full{background:#f5f5f5;position:relative;padding:3em 0}.span-fu
ll::before,.span-full::after{content:'';height:100%;width:100%;top:0;position:ab
solute;background:#f5f5f5;z-index:-1}.span-full::before{left:-100%}.span-full::a
fter{left:100%}.button{background:#0370ea;background-image:-webkit-gradient(line
ar, 50% 0%, 50% 100%, color-stop(0%, #008dfd), color-stop(100%, #0370ea));backgr
ound-image:-webkit-linear-gradient(top, #008dfd 0%,#0370ea 100%);background-imag
e:-moz-linear-gradient(top, #008dfd 0%,#0370ea 100%);background-image:-o-linear-
gradient(top, #008dfd 0%,#0370ea 100%);background-image:linear-gradient(top, #00
8dfd 0%,#0370ea 100%);border:1px solid #076bd2;border-radius:3px;color:#fff !imp
ortant;display:inline-block;font-size:13px;font-weight:700;line-height:1.3;paddi
ng:5px 20px;text-align:center;text-decoration:none !important;text-shadow:1px 1p
x 1px #076bd2}.button:hover{background-image:-webkit-gradient(linear, 50% 0%, 50
% 100%, color-stop(30%, #008dfd), color-stop(100%, #0370ea));background-image:-w
ebkit-linear-gradient(top, #008dfd 30%,#0370ea 100%);background-image:-moz-linea
r-gradient(top, #008dfd 30%,#0370ea 100%);background-image:-o-linear-gradient(to
p, #008dfd 30%,#0370ea 100%);background-image:linear-gradient(top, #008dfd 30%,#
0370ea 100%);cursor:pointer}.button a{color:inherit !important}.button-alt{backg
round:#eee;background-image:-webkit-gradient(linear, 50% 100%, 50% 0%, color-sto
p(46%, #dcdcdc), color-stop(87%, #fafafa));background-image:-webkit-linear-gradi
ent(bottom, #dcdcdc 46%,#fafafa 87%);background-image:-moz-linear-gradient(botto
m, #dcdcdc 46%,#fafafa 87%);background-image:-o-linear-gradient(bottom, #dcdcdc
46%,#fafafa 87%);background-image:linear-gradient(bottom, #dcdcdc 46%,#fafafa 87
%);border:1px solid #d6d6d6;border-radius:3px;color:#333 !important;display:inli
ne-block;font-size:12px;font-weight:700;line-height:24px;padding:0 15px;text-ali
gn:center;text-decoration:none !important;text-shadow:none}.button-alt:hover{bac
kground-image:-webkit-gradient(linear, 50% 100%, 50% 0%, color-stop(20%, #dcdcdc
), color-stop(87%, #fafafa));background-image:-webkit-linear-gradient(bottom, #d
cdcdc 20%,#fafafa 87%);background-image:-moz-linear-gradient(bottom, #dcdcdc 20%
,#fafafa 87%);background-image:-o-linear-gradient(bottom, #dcdcdc 20%,#fafafa 87
%);background-image:linear-gradient(bottom, #dcdcdc 20%,#fafafa 87%);cursor:poin
ter}.google-button{background-color:#f5f5f5;border-radius:2px 0 0 0;border:1px s
olid rgba(0,0,0,0.1);padding:5px 12px;text-align:center;white-space:nowrap}.goog
le-button:hover{border-color:#c6c6c6;-webkit-box-shadow:0 -1px 1px rgba(0,0,0,0.
1);-moz-box-shadow:0 -1px 1px rgba(0,0,0,0.1);box-shadow:0 -1px 1px rgba(0,0,0,0
.1)}.google-button:active{background-color:#f1f1f1;-webkit-box-shadow:inset 0 0p
x 2px rgba(0,0,0,0.2);-moz-box-shadow:inset 0 0px 2px rgba(0,0,0,0.2);box-shadow
:inset 0 0px 2px rgba(0,0,0,0.2)}.screenshot,.screenshot img{margin:1em 0}p.note
,p.caution,p.warning,div.note,div.caution,div.warning,aside.note,aside.caution,a
side.warning{background-color:#f5f5f5;border-bottom:1px solid;border-top:1px sol
id;overflow:hidden;width:85%;margin:auto;padding:1em}p.note,div.note,aside.note{
border-color:#36C}p.caution,div.caution,aside.caution{border-color:#FC3}p.warnin
g,div.warning,aside.warning{border-color:#A03}p.warning em,p.warning strong,div.
warning em,div.warning strong,aside.warning em,aside.warning strong{color:#A03}.
permalink{display:none;margin-left:5px}.has-permalink:hover .permalink{display:i
nitial}.no-permalink .permalink{display:none !important}#gc-footer .links a{marg
in-right:20px}#gc-footer #cc-info{font-size:11.2px}#social-buttons{display:-webk
it-box;display:-webkit-flex;display:-moz-flex;display:-ms-flex;display:-o-flex;d
isplay:flex;-webkit-box-pack:1;-webkit-justify-content:flex-end;-moz-justify-con
tent:flex-end;-ms-justify-content:flex-end;-o-justify-content:flex-end;justify-c
ontent:flex-end;-webkit-box-align:center;-webkit-align-items:center;-moz-align-i
tems:center;-ms-align-items:center;-o-align-items:center;align-items:center}#soc
ial-buttons>*{margin-left:10px}#social-buttons img{margin:-4px 0 0 1px}@media on
ly screen and (max-width: 580px){.more-section .g-last .g-content{padding-bottom
:0;border:none}.more-section .g-content{border:1px solid #dbdbdb;border-width:0
0 1px 0;padding-bottom:20px;margin-bottom:20px}#gc-footer .links a{display:inlin
e-block}}#scroll-to-top,#send-feedback{border-bottom:none;bottom:0;position:fixe
d;z-index:5}#scroll-to-top{border-left:0;left:0}#send-feedback{border-right:0;ri
ght:0}html{font-family:"Open Sans",Arial,"Lucida Grande",sans-serif;color:#777}b
ody{font-size:13px;color:#777}h1,h2,h3,h4,h5,h6{font-family:"Open Sans",Arial,"L
ucida Grande",sans-serif;font-weight:600;color:#000}h1,h2{font-weight:300}h1{fon
t-size:2.625em;line-height:1.14286em}h1+h1{margin-top:0em}h2{font-size:1.875em;l
ine-height:1.6em;margin-top:1.6em;margin-bottom:0em;line-height:1.12em}h3{font-s
ize:1.125em;line-height:1.33333em;margin-top:1.33333em;margin-bottom:0.53333em;l
ine-height:1.12em}h4{font-size:1.1em;line-height:1.36364em;margin-top:0em;margin
-bottom:0em}h5{font-size:1em;line-height:1.5em;margin-top:0em;margin-bottom:0em}
h6{font-size:1em;line-height:1.5em;margin-top:0em;margin-bottom:0em}p{margin:1.5
em 0}p.noindent,p.caption p{text-indent:0}p.caption{text-align:left}.lightbox p.
caption{color:#fff}a,a:link,a:visited{color:#39c;font-weight:bold;text-decoratio
n:none;word-wrap:break-word;transition:opacity 0.3s ease 0s}a:hover,a:focus,a:li
nk:hover,a:link:focus,a:visited:hover,a:visited:focus{color:#39f}a.section-ancho
r{display:block;padding-top:3.33em}footer[role="contentinfo"]{font-size:0.846153
85em}footer[role="contentinfo"] a,footer[role="contentinfo"] a:link,footer[role=
"contentinfo"] a:visited{color:#999;font-weight:normal;font-weight:600;text-deco
ration:none;word-wrap:break-word}footer[role="contentinfo"] a:hover,footer[role=
"contentinfo"] a:focus,footer[role="contentinfo"] a:link:hover,footer[role="cont
entinfo"] a:link:focus,footer[role="contentinfo"] a:visited:hover,footer[role="c
ontentinfo"] a:visited:focus{color:#39f}img{vertical-align:middle}figcaption{fon
t-family:"Open Sans",Arial,"Lucida Grande",sans-serif;color:#aaa}blockquote{marg
in:0.75em 0.8em}cite{margin:0.75em 0.8em;color:#c3c3c3;font-style:normal}canvas{
background:#fff;margin:1.5em 0}.code,code,pre{color:#080;font-family:"Source Cod
e Pro",sans-serif}pre{margin:2em 0;word-wrap:break-word;position:relative}pre[da
ta-filename]::after{content:attr(data-filename);background-color:#aaa;color:#fff
;padding:2px 12px;position:absolute;right:0;top:0}pre a{text-decoration:underlin
e}.static-code-container{line-height:1em;clear:both}code,kbd,samp{margin:1.5em 0
;line-height:1em}dl,menu,ol,ul,.item-list ul{margin:0.8em 0}ul{padding-left:1.28
em}ol{padding-left:1.52em}hr{height:1px;border:0;border-bottom:1px solid #dbdbdb
;padding-bottom:-1px;margin:1.5em 0}.capitalize{text-transform:uppercase}[data-l
ist-item]{display:list-item}.uncapitalize::first-letter{text-transform:lowercase
}.capitalize::first-letter{text-transform:uppercase}.kbd{background-color:#f7f7f
7;border:1px solid #ccc;color:#333;font-size:11px;line-height:1.4;text-shadow:0
1px 0 #fff;font-family:Arial,Helvetica,sans-serif;display:inline-block;padding:0
.1em 0.6em;margin:0 0.1em;white-space:nowrap;-webkit-box-shadow:0 1px 0px rgba(0
,0,0,0.2),0 0 0 2px #fff inset;-moz-box-shadow:0 1px 0px rgba(0,0,0,0.2),0 0 0 2
px #fff inset;box-shadow:0 1px 0px rgba(0,0,0,0.2),0 0 0 2px #fff inset;-webkit-
border-radius:3px;-moz-border-radius:3px;border-radius:3px}#topnav{display:-webk
it-box;display:-webkit-flex;display:-moz-flex;display:-ms-flex;display:-o-flex;d
isplay:flex;-webkit-box-align:center;-webkit-align-items:center;-moz-align-items
:center;-ms-align-items:center;-o-align-items:center;align-items:center;height:6
4px;position:relative}#logo{display:-webkit-box;display:-webkit-flex;display:-mo
z-flex;display:-ms-flex;display:-o-flex;display:flex;-webkit-box-align:center;-w
ebkit-align-items:center;-moz-align-items:center;-ms-align-items:center;-o-align
-items:center;align-items:center;-webkit-user-select:none;-moz-user-select:none;
-o-user-select:none;-ms-user-select:none;user-select:none}#logo a{display:-webki
t-box;display:-webkit-flex;display:-moz-flex;display:-ms-flex;display:-o-flex;di
splay:flex;-webkit-box-align:center;-webkit-align-items:center;-moz-align-items:
center;-ms-align-items:center;-o-align-items:center;align-items:center;color:#82
8282;font-size:2em;font-weight:400;letter-spacing:-1px}#logo a img{margin-bottom
:-4px;height:40px;width:123px}#logo .collase-icon{display:none;background:url(".
./../images/burger-icon.png") 50% 100% no-repeat;background-size:cover;width:20p
x;height:20px}#logo .collase-icon.active{background-position:50% 0}#fatnav{heigh
t:100%;display:-webkit-box;display:-webkit-flex;display:-moz-flex;display:-ms-fl
ex;display:-o-flex;display:flex;-webkit-box-pack:1;-webkit-justify-content:flex-
end;-moz-justify-content:flex-end;-ms-justify-content:flex-end;-o-justify-conten
t:flex-end;justify-content:flex-end;-webkit-box-flex:1;-webkit-flex:1;-moz-flex:
1;-ms-flex:1;-o-flex:1;flex:1;white-space:nowrap}#fatnav li{list-style:none}#fat
nav>ul{display:-webkit-box;display:-webkit-flex;display:-moz-flex;display:-ms-fl
ex;display:-o-flex;display:flex;padding:0;margin:0}#fatnav .toplevel{color:#aaa;
font-weight:600;text-transform:uppercase;-webkit-user-select:none;-moz-user-sele
ct:none;-o-user-select:none;-ms-user-select:none;user-select:none}#fatnav .tople
vel::after{content:'';background:url(data:image/png;base64,iVBORw0KGgoAAAANSUhEU
gAAAA4AAAAOCAYAAAAfSC3RAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAPJJR
EFUeNpiyc/Pn8XAwDATiM8yEAaMQBwBxHxMQMIdiE8D8Vog1sGjyQGqbhkQK4A0PoKaFATEF4F4MRCrI
mnQBuJtQLwfiI2hYk9AGl2AuB2I/wAxiB8DxNeAeA4QzwXiS0DsCdXwHIj9gHgqSOFPIK4CYksgvgJVw
ALEyUCcBDWMAeoSkO2bGZAEQeAM1CmtUNth4BkQ+wJxHBC/hwkyoQXALyCuAWILIL4MxIugAbYFI3iNZ
54BR4fNtcXo0QEy9B+ywBGtWMzoAAquBWLk6EDXhBIdLNDokINGRwBQAUiiCYhvI0VHN1LIjpjoAAgwA
MoSTlKlzAY4AAAAAElFTkSuQmCC) no-repeat;background-size:9px;display:inline-block;
height:5px;width:14px;margin-left:10px;margin-bottom:2px}#fatnav .pillar{display
:-webkit-box;display:-webkit-flex;display:-moz-flex;display:-ms-flex;display:-o-
flex;display:flex;-webkit-box-align:center;-webkit-align-items:center;-moz-align
-items:center;-ms-align-items:center;-o-align-items:center;align-items:center;pa
dding:0 20px;cursor:pointer;z-index:1002}#fatnav .expandee{display:none;position
:absolute;z-index:1001;left:0;width:100%;-webkit-box-sizing:border-box;-moz-box-
sizing:border-box;box-sizing:border-box;background-color:#f5f5f5;padding:20px 0;
cursor:initial;margin:0}#fatnav .expandee a{font-weight:600;padding:0.5em 0;disp
lay:block;color:#828282}#fatnav .expandee a:hover{background-image:-webkit-linea
r-gradient(205deg, rgba(229,229,229,0.7) 0%,rgba(233,233,233,0.7) 20%,rgba(244,2
44,244,0.7) 100%);background-image:-moz-linear-gradient(205deg, rgba(229,229,229
,0.7) 0%,rgba(233,233,233,0.7) 20%,rgba(244,244,244,0.7) 100%);background-image:
-o-linear-gradient(205deg, rgba(229,229,229,0.7) 0%,rgba(233,233,233,0.7) 20%,rg
ba(244,244,244,0.7) 100%);background-image:linear-gradient(205deg, rgba(229,229,
229,0.7) 0%,rgba(233,233,233,0.7) 20%,rgba(244,244,244,0.7) 100%)}#fatnav .expan
dee li{white-space:nowrap}#fatnav .expandee li.submenu{color:#333;font-size:1.1e
m;font-weight:bold;cursor:pointer;-webkit-box-flex:1;-webkit-flex:1;-moz-flex:1;
-ms-flex:1;-o-flex:1;flex:1}#fatnav .expandee li.submenu.active{background-image
:-webkit-linear-gradient(205deg, rgba(229,229,229,0.7) 0%,rgba(233,233,233,0.7)
20%,rgba(244,244,244,0.7) 100%);background-image:-moz-linear-gradient(205deg, rg
ba(229,229,229,0.7) 0%,rgba(233,233,233,0.7) 20%,rgba(244,244,244,0.7) 100%);bac
kground-image:-o-linear-gradient(205deg, rgba(229,229,229,0.7) 0%,rgba(233,233,2
33,0.7) 20%,rgba(244,244,244,0.7) 100%);background-image:linear-gradient(205deg,
rgba(229,229,229,0.7) 0%,rgba(233,233,233,0.7) 20%,rgba(244,244,244,0.7) 100%)}
#fatnav .expandee li.submenu>ul{font-size:0.8em;padding:15px 0 0 0;margin:0}#fat
nav .expandee li.submenu .category{border-bottom:1px solid #e8e8e8}#fatnav .expa
ndee li.submenu .category:last-child{border:none}#fatnav .expandee li.submenu .c
ategory a{overflow:hidden;text-overflow:ellipsis}#fatnav .expandee li.submenu .c
ategory>ul{display:none}#fatnav .expandee li.submenu .category ul{padding:0}#sea
rch{display:-webkit-inline-flex;display:-moz-inline-flex;display:-ms-inline-flex
;display:-o-inline-flex;display:inline-flex;-webkit-align-self:stretch;-moz-alig
n-self:stretch;-ms-align-self:stretch;-o-align-self:stretch;align-self:stretch;-
webkit-box-align:center;-webkit-align-items:center;-moz-align-items:center;-ms-a
lign-items:center;-o-align-items:center;align-items:center;width:auto;padding:0
20px;cursor:pointer}#search img{height:16px;width:16px;-webkit-user-select:none;
-moz-user-select:none;-o-user-select:none;-ms-user-select:none;user-select:none}
#search .expandee{padding:20px}#search .expandee input[type="search"]{width:100%
;-webkit-box-sizing:border-box;-moz-box-sizing:border-box;box-sizing:border-box;
background:url("../../images/search.png") no-repeat 15px 55%;background-size:20p
x;background-color:white;border:1px solid #dbdbdb;padding:10px 10px 10px 40px;fo
nt-size:1.4em;-webkit-box-flex:1;-webkit-flex:1;-moz-flex:1;-ms-flex:1;-o-flex:1
;flex:1;font-family:inherit;font-weight:300}@media only screen and (min-width: 5
80px){#topnav{padding:15px 0 0}#fatnav .pillar.active{background:#f5f5f5 url(dat
a:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAYAAAAyCAMAAABI+VrBAAAAGXRFWHRTb2Z0d
2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAALFQTFRF/////f39/v7+/Pz8+/v7+fn56+vr+vr69PT09
vb28/Pz9fX1xcXF9/f3+Pj45+fn8PDwycnJ7+/v6enpzc3N19fX8fHx8vLy7u7u6Ojo7Ozs3Nzc5OTk7
e3t4uLi2dnZ39/fxsbG29vb0dHR3d3d4ODg4+Pj6urqyMjI09PT5eXl0NDQ1dXV2NjYysrKx8fH5ubmz
s7O3t7exMTE4eHh2tray8vLz8/PzMzM1NTU1tbWhgtdWwAAAOFJREFUeNok0NWSxCAURdFDhCQkMx3tu
Le7jP//h829NC+rqIKNAK8hhGEQjmUyrm+ziVTs50O6jkA6b+J3gSCqpWfiGZxL1yKyhbIQEDQLxj7xT
Yy7SXoCY1RXbwLXy6OgfdevIbYFdulHaBuI7t3SIY5Nbhm4zAdF/Ow5gvTEEaR/W49Ov2eSIvjuW+Y4t
dTCXHML+1XI/A7cwmmdM1nHLZwbl+kPPj9lunELq5LuRWy5hUFyC+uKI+hazabgCJpYcws5gsXS5F8qc
02i9C9Jn9ejelHoMkJdhrJ5xb8AAwBmihB0TS21nQAAAABJRU5ErkJggg==) no-repeat right 0}#
fatnav .pillar.active .toplevel::after{background-position:0% -5px}#fatnav .pill
ar.active .expandee{display:-webkit-box;display:-webkit-flex;display:-moz-flex;d
isplay:-ms-flex;display:-o-flex;display:flex;-webkit-box-orient:vertical;-webkit
-flex-direction:row;-moz-flex-direction:row;-ms-flex-direction:row;-o-flex-direc
tion:row;flex-direction:row}#fatnav .pillar.active .expandee::after{position:abs
olute;background-image:-webkit-gradient(linear, 50% 100%, 50% 0%, color-stop(0%,
rgba(255,255,255,0)), color-stop(25%, rgba(211,211,211,0.5)), color-stop(50%, #
d3d3d3), color-stop(75%, rgba(211,211,211,0.5)), color-stop(100%, rgba(255,255,2
55,0)));background-image:-webkit-linear-gradient(bottom, rgba(255,255,255,0) 0%,
rgba(211,211,211,0.5) 25%,#d3d3d3 50%,rgba(211,211,211,0.5) 75%,rgba(255,255,255
,0) 100%);background-image:-moz-linear-gradient(bottom, rgba(255,255,255,0) 0%,r
gba(211,211,211,0.5) 25%,#d3d3d3 50%,rgba(211,211,211,0.5) 75%,rgba(255,255,255,
0) 100%);background-image:-o-linear-gradient(bottom, rgba(255,255,255,0) 0%,rgba
(211,211,211,0.5) 25%,#d3d3d3 50%,rgba(211,211,211,0.5) 75%,rgba(255,255,255,0)
100%);background-image:linear-gradient(bottom, rgba(255,255,255,0) 0%,rgba(211,2
11,211,0.5) 25%,#d3d3d3 50%,rgba(211,211,211,0.5) 75%,rgba(255,255,255,0) 100%);
right:0;top:0;content:'';width:1px !important;height:100%}#fatnav .pillar .expan
dee{min-height:400px;font-size:0.9em;box-shadow:0 3px 4px rgba(0,0,0,0.12);top:6
4px}#fatnav .pillar .expandee .submenu{padding:0 20px;border-right:1px solid #e8
e8e8}#fatnav .pillar .expandee .submenu:last-child{border:none}#search{margin-ri
ght:-4px}#search.active{background:#f5f5f5 url(data:image/png;base64,iVBORw0KGgo
AAAANSUhEUgAAAAYAAAAyCAMAAABI+VrBAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccl
lPAAAALFQTFRF/////f39/v7+/Pz8+/v7+fn56+vr+vr69PT09vb28/Pz9fX1xcXF9/f3+Pj45+fn8PD
wycnJ7+/v6enpzc3N19fX8fHx8vLy7u7u6Ojo7Ozs3Nzc5OTk7e3t4uLi2dnZ39/fxsbG29vb0dHR3d3
d4ODg4+Pj6urqyMjI09PT5eXl0NDQ1dXV2NjYysrKx8fH5ubmzs7O3t7exMTE4eHh2tray8vLz8/PzMz
M1NTU1tbWhgtdWwAAAOFJREFUeNok0NWSxCAURdFDhCQkMx3tuLe7jP//h829NC+rqIKNAK8hhGEQjmU
yrm+ziVTs50O6jkA6b+J3gSCqpWfiGZxL1yKyhbIQEDQLxj7xTYy7SXoCY1RXbwLXy6OgfdevIbYFdul
HaBuI7t3SIY5Nbhm4zAdF/Ow5gvTEEaR/W49Ov2eSIvjuW+Y4tdTCXHML+1XI/A7cwmmdM1nHLZwbl+k
PPj9lunELq5LuRWy5hUFyC+uKI+hazabgCJpYcws5gsXS5F8qc02i9C9Jn9ejelHoMkJdhrJ5xb8AAwB
mihB0TS21nQAAAABJRU5ErkJggg==) no-repeat right 0}#search.active .expandee{displa
y:block;top:64px}}@media only screen and (max-width: 580px){#topnav{-webkit-box-
orient:vertical;-webkit-flex-direction:column;-moz-flex-direction:column;-ms-fle
x-direction:column;-o-flex-direction:column;flex-direction:column;height:auto}#f
atnav{width:100%;max-height:0;overflow:hidden;background:#f5f5f5}#fatnav.active{
max-height:5000px}#fatnav>ul{-webkit-box-flex:1;-webkit-flex:1;-moz-flex:1;-ms-f
lex:1;-o-flex:1;flex:1;-webkit-box-orient:vertical;-webkit-flex-direction:column
;-moz-flex-direction:column;-ms-flex-direction:column;-o-flex-direction:column;f
lex-direction:column}#fatnav .toplevel{width:100%;height:50px;-webkit-box-align:
center;-webkit-align-items:center;-moz-align-items:center;-ms-align-items:center
;-o-align-items:center;align-items:center;-webkit-box-pack:1;-webkit-justify-con
tent:center;-moz-justify-content:center;-ms-justify-content:center;-o-justify-co
ntent:center;justify-content:center;display:-webkit-inline-flex;display:-moz-inl
ine-flex;display:-ms-inline-flex;display:-o-inline-flex;display:inline-flex}#fat
nav .pillar{-webkit-box-orient:vertical;-webkit-flex-direction:column;-moz-flex-
direction:column;-ms-flex-direction:column;-o-flex-direction:column;flex-directi
on:column;padding:0;border-bottom:1px solid #dbdbdb}#fatnav .pillar.active .expa
ndee{display:initial}#fatnav .expandee{position:relative;padding:0;background-co
lor:rgba(229,229,229,0.7)}#fatnav .expandee li.submenu{padding:10px 15px}#fatnav
.expandee li.submenu:not(:last-child){border-color:#ccc}#fatnav .expandee li.su
bmenu>ul{background-color:inherit}#logo{height:50px;width:90%}#logo a{-webkit-bo
x-flex:1;-webkit-flex:1;-moz-flex:1;-ms-flex:1;-o-flex:1;flex:1}#logo .collase-i
con{display:initial}#search{display:-webkit-box;display:-webkit-flex;display:-mo
z-flex;display:-ms-flex;display:-o-flex;display:flex;-webkit-box-align:center;-w
ebkit-align-items:center;-moz-align-items:center;-ms-align-items:center;-o-align
-items:center;align-items:center;-webkit-box-ordinal-group:-1;-webkit-order:-1;-
moz-order:-1;-ms-order:-1;-o-order:-1;order:-1;padding:15px 15px 0 15px}#search
img{display:none}#search .expandee{display:block}}#gc-pagecontent .g-section h1,
#gc-pagecontent .g-section h2,#gc-pagecontent .g-section h3{margin:0}#upcoming-e
vents .screenshot,#featured .screenshot{margin-top:0}#upcoming-events article{bo
rder:1px solid #dbdbdb;border-width:0 0 1px 0;padding:20px 0}#upcoming-events ar
ticle:first-child{padding-top:0}#upcoming-events article:last-child{padding-bott
om:0;border:none}#site-sections{background-color:#f5f5f5;padding:20px;text-align
:center}#site-sections h2{padding-top:20px}#site-sections h2::before{display:blo
ck;content:'';background:url("../../images/bucket-icons.png") 12px 50% no-repeat
;width:100px;height:65px;background-size:cover;margin:auto;margin-bottom:20px}#s
ite-sections h2.multidevice::before{background-position:-91px 50%}#site-sections
h2.platform::before{background-position:-194px 50%}#developer-news{margin-top:4
em}#developer-news .g-content{margin-right:20px}#developer-news h1{margin-bottom
:40px !important}@media only screen and (min-width: 580px){#featured{padding-rig
ht:30px;padding-bottom:10px;border:1px solid #dbdbdb;border-width:0 1px 0 0}#fea
tured img{margin-bottom:20px}}.pillar-content h1{font-size:42px}.pillar-content>
.g-section{padding:3em 0}.pillar-content>.g-section:not(:last-of-type){border-bo
ttom:1px solid #dbdbdb}.pillar-content>.g-section>h2{font-size:30px;margin-botto
m:1.5em !important}.pillar-content .article-list article{position:relative;overf
low:hidden;width:100%;padding:1.9em;background-color:#f5f5f5;box-shadow:0 2px 4p
x rgba(0,0,0,0.15),0 0 3px rgba(0,0,0,0.15);line-height:1.5em;margin-bottom:1.5e
m}.pillar-content .article-list article.new::after{content:'new';background:#2e8
2c9;position:absolute;-webkit-transform:rotate(45deg);-moz-transform:rotate(45de
g);-ms-transform:rotate(45deg);-o-transform:rotate(45deg);transform:rotate(45deg
);top:-4px;right:-20px;color:white;font-size:0.9em;width:60px;text-align:center;
padding-top:8px}.pillar-content .article-list article p{font-weight:300}.pillar-
content #further-resources .g-content h2::before{display:inline-block;content:''
;background:url("../../images/further-resources-icons.svg") 0 50% no-repeat;widt
h:50px;height:43px;background-size:cover;margin:auto;margin-bottom:5px;vertical-
align:middle}.pillar-content #further-resources .g-content h2.school::before{bac
kground-position:0 50%}.pillar-content #further-resources .g-content h2.chat::be
fore{background-position:-54px 50%}.pillar-content #further-resources .g-content
h2.puzzle::before{background-position:-108px 50%}@media only screen and (max-wi
dth: 580px){.pillar-content>.g-section{padding:2em 0}}@media only screen and (mi
n-width: 580px){.pillar-content .article-list{display:-webkit-box;display:-webki
t-flex;display:-moz-flex;display:-ms-flex;display:-o-flex;display:flex;-webkit-f
lex-wrap:wrap;-moz-flex-wrap:wrap;-ms-flex-wrap:wrap;-o-flex-wrap:wrap;flex-wrap
:wrap;-webkit-box-pack:1;-webkit-justify-content:space-between;-moz-justify-cont
ent:space-between;-ms-justify-content:space-between;-o-justify-content:space-bet
ween;justify-content:space-between;-webkit-box-align:stretch;-webkit-align-items
:stretch;-moz-align-items:stretch;-ms-align-items:stretch;-o-align-items:stretch
;align-items:stretch}.pillar-content .article-list article{-webkit-box-flex:auto
;-webkit-flex:auto;-moz-flex:auto;-ms-flex:auto;-o-flex:auto;flex:auto;margin-ri
ght:1.5em;width:45%}.pillar-content .article-list article:nth-child(2n),.pillar-
content .article-list article:last-of-type{margin-right:0}}@media only screen an
d (min-width: 990px){.pillar-content .article-list article{width:30%}.pillar-con
tent .article-list article:nth-child(2n){margin-right:1.5em}.pillar-content .art
icle-list article:nth-child(3n),.pillar-content .article-list article:last-of-ty
pe{margin-right:0}}@supports not (flex-wrap: wrap){.pillar-content .article-list
{display:block}@media only screen and (min-width: 580px){.pillar-content .articl
e-list article{flex:none;float:left;width:48%}}@media only screen and (min-width
: 990px){.pillar-content .article-list article{width:31.8058%}}}.load-more-artic
les{overflow:hidden;*zoom:1;margin:2em auto 0.3em;text-align:center;width:100%}.
load-more-articles a,.load-more-articles a:hover{color:#000;transition:opacity 0
.3s ease 0s}.nav-arrow{background-size:48px 48px;background:top center no-repeat
;display:inline-block;opacity:0.5;transition:opacity 0.3s ease 0s;padding-top:50
px}.nav-arrow:hover{opacity:1}.down-arrow{background-image:url("../../images/dow
n-arrow.png")}.inline-toc{line-height:1.3em}.inline-toc a,.inline-toc a:link,.in
line-toc a:visited{color:#aaa;font-weight:normal}.inline-toc a:hover,.inline-toc
a:focus,.inline-toc a:link:hover,.inline-toc a:link:focus,.inline-toc a:visited
:hover,.inline-toc a:visited:focus{color:#000}.inline-toc li li a,.inline-toc li
li a:link,.inline-toc li li a:visited{color:#aaa}.inline-toc li li a:hover,.inl
ine-toc li li a:focus,.inline-toc li li a:link:hover,.inline-toc li li a:link:fo
cus,.inline-toc li li a:visited:hover,.inline-toc li li a:visited:focus{color:#0
00}.inline-toc a{display:-webkit-box;display:-webkit-flex;display:-moz-flex;disp
lay:-ms-flex;display:-o-flex;display:flex;padding:0.5em 0}.inline-toc .related{d
isplay:block}.inline-toc .related li a.active{color:#000}.inline-toc #toc{displa
y:none}.inline-toc #toc .toplevel>a{font-weight:bold;color:#000}.inline-toc #toc
.toplevel>a.hastoc::after{content:'+';-webkit-box-flex:1;-webkit-flex:1;-moz-fl
ex:1;-ms-flex:1;-o-flex:1;flex:1;text-align:right}.inline-toc #toc .toplevel.act
ive .toc{display:block}.inline-toc #toc .toplevel.active>a.hastoc::after{content
:'-'}.inline-toc .toc{margin:0;padding:0;border-top:1px solid #dbdbdb}.inline-to
c .toc .toc{display:none}.inline-toc .toc .toc li{padding-left:1em;border-bottom
:1px solid #dbdbdb}#cc-info{display:-webkit-box;display:-webkit-flex;display:-mo
z-flex;display:-ms-flex;display:-o-flex;display:flex;-webkit-box-align:center;-w
ebkit-align-items:center;-moz-align-items:center;-ms-align-items:center;-o-align
-items:center;align-items:center;font-style:italic;font-size:0.8em;color:#848484
}#cc-info .cc-logo img{width:90px;height:32px}#cc-info .last-updated{-webkit-box
-flex:1;-webkit-flex:1;-moz-flex:1;-ms-flex:1;-o-flex:1;flex:1}@media only scree
n and (min-width: 580px){.inline-toc{position:absolute;top:0;left:50%;margin-lef
t:195px;width:240px;overflow:auto;overflow-x:hidden}.inline-toc.sticky{position:
fixed}.inline-toc #toc{display:block}.article-content{width:70%;padding-right:5%
;border-right:1px solid #f5f5f5}.cc-logo{margin:0 0 0 auto}}@media only screen a
nd (min-width: 581px) and (max-width: 990px){.inline-toc{width:200px;margin-left
:165px}}@media only screen and (max-width: 580px){.article-content [itemprop="ar
ticleBody"]>.collapsible{height:58px;overflow:hidden}.article-content [itemprop=
"articleBody"]>.collapsible.active{height:auto}.article-content [itemprop="artic
leBody"]>.collapsible.active h2::before{content:'-'}.article-content [itemprop="
articleBody"]>.collapsible h2{position:relative;margin:0;padding:15px 15px 15px
0;border-top:1px solid #dbdbdb;white-space:nowrap;overflow:hidden;text-overflow:
ellipsis}.article-content [itemprop="articleBody"]>.collapsible h2::before{posit
ion:absolute;right:0;content:'+'}.article-content [itemprop="articleBody"] .rela
ted{margin:20px 0}}.api{color:#333;font-size:14px}.api .api-summary td,.api .api
-summary th{padding:5px 10px}.api .api-reference .description{margin-left:20px}.
api .api-reference table.innerTable{margin:10px 0}.api .api-reference table.inne
rTable td,.api .api-reference table.innerTable th{padding:5px 10px;border:1px so
lid #eee}.api .api-reference table.innerTable th{background:none}.api .api-refer
ence table.innerTable p{margin:0}.api .api-reference td,.api .api-reference th{v
ertical-align:top;border:1px solid #eee}.api .api-reference th{background:#fafaf
a}.api .api-reference h2{background-color:#e8e8e8;padding:20px;margin-left:-20px
;margin-right:-20px}.api .api-reference h3{margin-top:3em} |