@backgroundcolor: rgba(0,0,0,0.38);
@backgroundcolor_element: rgba(255,255,255,0.25);
@backgroundcolor_element_hover: rgba(255,255,255,0.50);
@margin_element: 2px;



/* RESET */

html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed, 
figure, figcaption, footer, header, hgroup, 
menu, nav, output, ruby, section, summary,
time, mark, audio, video {
    margin: 0;
    padding: 0;
    border: 0;
    font-size: 100%;
    font: inherit;
    vertical-align: baseline;
}
/* HTML5 display-role reset for older browsers */
article, aside, details, figcaption, figure, 
footer, header, hgroup, menu, nav, section {
    display: block;
}
body {
    line-height: 1;
}
ol, ul {
    list-style: none;
}
blockquote, q {
    quotes: none;
}
blockquote:before, blockquote:after,
q:before, q:after {
    content: '';
    content: none;
}
table {
    border-collapse: collapse;
    border-spacing: 0;
}

/* RESET END */



html, body {
  height: 98.5%;
}

body {
  font: 12px "Lucida Grande", Helvetica, Arial, sans-serif;
  background-color: @backgroundcolor;
  background-image: url('/images/gl_formentera_seil.jpg');
  background-size: auto 100%;
  background-repeat: no-repeat;
  background-position: left top;
}

a {
  color: #00B7FF;
}

.hidden {
  display: none;
}

#navigation {
  height: 70%;
  display: flex;
  flex-wrap: nowrap;
  justify-content: center;
  align-items: stretch;
  align-content: center;
  
  .tile {
    background-color: @backgroundcolor_element;
    margin: @margin_element;
    flex-grow: 1;
    flex-basis: auto;
    align-self: flex-start;
    height: 100%;
    
    .content {
      height: inherit;
      text-align: center;
      padding: @margin_element;
      
      .icon {
        display: block;
        margin: auto;
        height: 50%;
      }
      
      .title {
        display: block;
        margin-top: 20px;
        font-size: 2.2em;
      }
    }
    
    &:hover {
      background-color: @backgroundcolor_element_hover;
    }
  }
}

#controls {
  background-color: @backgroundcolor_element;
  height: 30%;
  margin: @margin_element;
  margin-top: (@margin_element * 2);
  display: flex;
  flex-wrap: nowrap;
  justify-content: center;
  align-items: stretch;
  align-content: center;
  
  .control {
    display: block;
    margin: @margin_element;
    flex-grow: 1;
    flex-basis: auto;
    align-self: flex-start;
    height: 100%;
    text-align: center;
    text-decoration: none;
    font-size: 50px;
    
    &:hover {
      background-color: @backgroundcolor_element_hover;
    }
    
    &.empty {
      visibility: hidden;
    }
  }
}