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a:focus,.nav-logo:hover,.nav-logo:focus{opacity:.6}#downArrow{bottom:7rem}#downArrow.down{bottom:1rem}#upArrow{top:7rem}}@media screen and (min-width: 80em){.nav-logo{background-position:-18em 0;width:10em}}@media screen and (max-height: 46em) and (orientation: landscape){#site-navigation{display:none}#downArrow{bottom:1rem}#upArrow{top:1rem}}@media screen and (max-height: 40em) and (orientation: landscape){.navArrow{left:90%}}.illus,.illus *{position:absolute;box-sizing:border-box;pointer-events:none;-moz-transform:translate(0, 0);-ms-transform:translate(0, 0);-webkit-transform:translate(0, 0);transform:translate(0, 0);-moz-transition:bottom 1s ease-out,top 1s ease-out;-o-transition:bottom 1s ease-out,top 1s ease-out;-webkit-transition:bottom 1s ease-out,top 1s ease-out;transition:bottom 1s ease-out,top 1s ease-out}@media screen and (min-width: 60em){#earth{font-size:80rem;z-index:50;right:50%;margin-right:-.5em;width:1em;height:1em;background:url('../img/illus/earth-med.png');background-size:1em auto}#earth div{width:1em}.toScreen1 #earth{top:-.3em}.toScreen2 #earth{top:-.32em}.toScreen3 #earth{top:-.45em}#clouds{font-size:1.75em;width:1em;height:0.34734em;z-index:5;top:-.38em;left:50%;margin-left:-.5em;background:url('../img/illus/clouds.png') top no-repeat;background-size:1em auto}#max{font-size:.15em;height:1.95822em;background:url('../img/illus/max.gif');background-size:1em auto;left:2em;top:-1em}#nina{font-size:.15em;height:1.73659em;background:url('../img/illus/nina.gif');background-size:1em auto;left:3.5em;top:-.667em}#volcan{font-size:.092em;height:1.39496em;background:url('../img/illus/volcan.png');background-size:1em auto;left:2.75em;top:.24em}#earth #bulles{width:.01em;height:.01em;left:.235em;top:.57em}#fusee{font-size:.3125em;height:0.2375em;background:url('../img/illus/fusee.png');background-size:1em 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