LESS for First Mediavida CSS Dare: http://www.mediavida.com/foro/dev/primer-css-dare-497101

gistfile1.less

@import url(http://yui.yahooapis.com/3.14.0/build/cssreset/cssreset-min.css);
@import url(http://fonts.googleapis.com/css?family=Signika+Negative:300,400,600);


// Adding source for resulting CSS:
/* Compiled from https://gist.github.com/scumah/7682811 */
/* Please refer to that file */

// General styles
// --------------

html {
  height: 100%;
}

body {
  .icon-full(@icon-question-sign, 35px);
  position: relative;
  padding: 70px 10px 10px;
  min-height: 100%;
  background-color: @main-bg-color;
  color: @text-color;
  font-weight: 300;
  font-family: Signika Negative;

  &:before {
    position: fixed;
    bottom: 23px;
    left: 10px;
    color: lighten(@text-color, 30%);
    text-shadow: 0 1px 1px #FFF, 0 -1px 1px rgba(0, 0, 0, 0.6);
  }

  &:after {
    .box-sizing(border-box);
    position: fixed;
    bottom: 10px;
    left: 50px;
    padding: 5px 10px;
    height: 30px;
    border-radius: 3px;
    background-color: @secondary-bg-color;
    box-shadow: inset 1px 2px 1px rgba(0, 0, 0, 0.1);
    content: "handcrafted by scumah";
    text-shadow: 0 1px 0px #FFF;
    font-size: 14px;
    line-height: 21px;
  }

}

a {
  .transition(all .1s ease-in);
  color: @link-color;
  text-decoration: none;

  &:hover {
    color: @link-hover-color;
  }

}

.button {
  .button();
}

[class*="fontawesome-"]:before {
  font-family: 'FontAwesome', sans-serif;
}


// Specific styles
// ---------------

.header {
  .icon-full(@icon-heart);
  position: fixed;
  top: 0;
  left: 0;
  z-index: 99;
  padding: 10px;
  width: 100%;
  background-color: @secondary-bg-color;
  box-shadow: 0 1px 1px rgba(0, 0, 0, .2);

  &:before {
    .transition(all 1s cubic-bezier(.03, .42, 0, 1));
    position: absolute;
    top: 10px;
    left: 10px;
    font-size: 31px;
  }

  &:hover:before {
    .transform-scale(1.2);
    color: @main-accent-color;
  }

  ul {
    margin-left: 30px;
    list-style-type: none;

    li {
      float: left;

      a {
        .icon();
        display: inline-block;
        border-radius: 4px;
        margin-right: 20px;
        padding: 5px 10px;
        background-color: @secondary-text-color;
        font-weight: 400;

        &#header-home {
          .icon-lite(@icon-home);
        }

        &#header-profile {
          .icon-lite(@icon-user);
        }

        &#header-settings {
          .icon-lite(@icon-cog);
        }

        &#header-templates {
          .icon-lite(@icon-edit);
        }

        &#header-logout {
          .icon-lite(@icon-off);

          &:before {
            color: @link-hover-color;
          }

        }

        &:hover, &.active-link {
          background-color: @link-hover-color;
          color: @secondary-text-color;

          &:before {
            color: @secondary-text-color !important;
          }

        }

      }

      &:nth-child(5) {
        float: right;
      }

    }

  }

}

.sidebar {
  border-radius: 3px;
  background-color: @secondary-text-color;
  box-shadow: 0 0px 2px rgba(0, 0, 0, .2);

  .userbox {

    .name {
      border-bottom: 1px solid darken(@main-accent-color, 20%);

      a {
        display: block;
        padding: 10px;
        border-top-left-radius: 3px;
        border-top-right-radius: 3px;
        background-color: @link-hover-color;
        color: @secondary-text-color;

        img {
          .transition(box-shadow .2s ease-in);
          border-radius: 50px;
          display: block;
        }

        br {
          display: none;
        }

        span {
          padding-left: 10px;
          line-height: 32px;
        }

        &:hover {
          background-color: darken(@main-accent-color, 5%);
        }

      }

    }

    .counters {
      padding: 10px;

      & > div {

        .number {
          .icon();

          &:before {
            color: @main-accent-color !important;
          }

        }

        .description {
          display: none;
        }

        &:nth-child(1) .number {
          .icon-lite(@icon-twitter-sign);
        }

        &:nth-child(2) .number {
          .icon-lite("@");

          &:before {
            vertical-align: baseline;
            font-weight: 600;
            font-family: Signika Negative;
          }

        }

        &:nth-child(3) .number {
          .icon-lite(@icon-plus);
        }

      }

    }

  }

  form {
    padding: 10px;

    textarea {
      .box-sizing(border-box);
      padding: 5px;
      width: 100%;
      height: 90px;
      border: 1px solid lighten(@secondary-accent-color, 15%);
      border-radius: 3px;
      background-color: lighten(@secondary-accent-color, 48%);

      &:focus {
        outline: none;
        border-color: darken(@secondary-accent-color, 10%)
      }

    }

    .button {
      width: 100%;

      &:focus {
        outline: none;
        background-color: darken(@secondary-accent-color, 10%)
      }

    }

  }

  .recommended-follows {
    padding: 10px;

    .title {
      margin-bottom: 10px;
      border-bottom: 1px solid lighten(@main-accent-color, 30%);
    }

    .users {

      img {
        margin-right: 1px;
        border-radius: 50px;
      }

    }

  }

}

.big-section {
  position: relative;
  overflow: hidden;
  padding: 0;
  border-radius: 3px;
  background-color: @secondary-text-color;
  box-shadow: 0 0px 2px rgba(0, 0, 0, .2);

  h2 {
    margin: 20px 0 30px 20px;
    border-bottom: 1px solid #FFF;
    box-shadow: 0px 1px 0 fade(#000, 6%);
    color: @secondary-accent-color;
    text-shadow: 0px 2px 0 darken(@secondary-accent-color, 15%), 0px 5px 3px rgba(0,0,0,0.15);
    font-size: 60px;

    &:after {
      .animated();
      .bounceIn();
      display: inline-block;
      margin-left: 10px;
      width: 1em;
      vertical-align: top;
      text-align: center;
      font-weight: normal;
      font-style: normal;
      font-size: 35px;
      font-family: FontAwesome;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }

  }

  &.tweet-list {

    h2:after {
      content: @icon-twitter-sign;
    }

  }

  .tweet {
    .transition(all .1s ease-in);
    position: relative;
    padding: 10px;
    border-bottom: 1px solid darken(@secondary-text-color, 7%);
    background-color: @secondary-text-color;

    &:nth-child(2n+1) {
      background-color:darken(@secondary-text-color, 3%);
    }

    .avatar {

      a, img {
        display: block;
      }

      img {
        border-radius: 50px;
      }

    }

    .author {
      margin-bottom: 5px;
    }

    .timespan {
      position: absolute;
      top: 10px;
      right: 10px;

      a {
        color: lighten(@text-color, 23%)
      }

    }

    &:hover {
      background-color: lighten(@main-accent-color, 38%);
    }

    &:last-child {
      border-bottom: 0;
    }

  }

  .profile {
    position: relative;
    overflow: auto;
    background-image: url(http://pipsum.com/900x400.jpg);
    background-position: center;
    -webkit-background-size: cover;
    background-size: cover;
    text-align: center;

    .avatar img {
      border-radius: 50px;
      margin-top: 20px;
    }

    h1 {
      position: absolute;
      top: 10px;
      left: 20px;
      color: #FFF;
      text-shadow: 0px 1px 1px darken(#FFF, 75%);
      font-size: 20px;
    }

    h2 {
      box-shadow: none;
      margin: 0 0 20px;
      border-bottom: 0;
      color: #FFF;
      text-shadow: 0px 2px 0 darken(#FFF, 55%), 0px 5px 3px rgba(0,0,0,0.15);
      line-height: 30px;
    }

    p {
      margin: 0 20px;
      color: white;
      text-shadow: 0px 1px 1px darken(#FFF, 75%);

      a {
        color: lighten(@secondary-accent-color, 30%);

        &:hover {
          color: #FFF;
        }

      }

    }

    .counters {
      padding: 10px;
      margin: 20px 8% 10px;
      border-radius: 3px;
      background-color: @secondary-text-color;
      box-shadow: 0 1px 3px rgba(0, 0, 0, .6);

      .grid-25 {
        border-right: 1px solid darken(@secondary-text-color, 7%);
        border-left: 1px solid #FFF;

        &:first-child {
          border-left: 0;
        }

        &:nth-child(4) {
          border-right: 0;
        }

      }

      .follow-button {
        line-height: 200%;

        &.unfollow {
          background-color: @main-accent-color;
        }

      }

    }

  }

  .tweets > h3, .profile ~ h2 {
    margin: 20px 0 10px 20px;
    border-bottom: 1px solid #FFF;
    box-shadow: 0px 1px 0 fade(#000, 6%);
    color: @secondary-accent-color;
    text-shadow: 0px 2px 0 darken(@secondary-accent-color, 15%), 0px 5px 3px rgba(0,0,0,0.15);
    font-size: 48px;
  }

  .usersgrid {
    padding: 10px;
    text-align: center;

    img {
      border-radius: 50px;
    }

  }

  a[href="http://twittard.piradoiv.com/templates/add"] {
    .button();
    margin: 0 0 20px 20px;
    display: inline-block;

    & ~ ul {
      position: relative;
      padding: 10px;

      &:before, &:after {
        position: absolute;
        top: -50px;
        font-size: 13px;
        right: 20px;
        content: "Las plantillas que ya has probado tienen el botón en verde";
        color: @secondary-accent-color;
      }

      &:after {
        top: -30px;
        color: @main-accent-color;
        content: "Y las que no has probado tienen el botón en rosa";
      }

      .template-holder {
        position: relative;
        width: 32.333333%;
        margin: 0 1% 10px 0;
        padding: 10px;
        background-color: lighten(@secondary-bg-color, 5%);
        border: 1px solid @secondary-bg-color;

        &:after {
          position: absolute;
          top: -1px;
          right: -1px;
          display: block;
          width: 0;
          border-width: 0 25px 25px 0;
          border-style: solid;
          border-color: @secondary-text-color @secondary-text-color darken(@secondary-bg-color, 0%);
          background: #FCA20D;
          content: "";
        }

        &:nth-child(1), &:nth-child(2), &:nth-child(3) {

          .template h3 {
            .icon-full(@icon-trophy);
            font-size: 25px;
          }

        }

        &:nth-child(1) .template h3:before {
          color: #FFDB19!important;
        }

        &:nth-child(2) .template h3:before {
          color: #ACACAC!important;
        }

        &:nth-child(3) .template h3:before {
          color: #665D1E!important;
        }

        .template h3 {
          .ellipsis();
          margin-bottom: 5px;
          font-size: 20px;
        }

        &:nth-child(3) {
          margin-right: 0;
        }

        .template-author {

          a[href="http://twittard.piradoiv.com/@scumah"] {
            .icon-full(@icon-heart);

            &:before {
              color: @main-accent-color;
            }

          }

        }

        .template-actions {

          a {

            &:first-child {
              .button();
              display: inline-block;
              margin-top: 5px;
              background-color: @main-accent-color;

              &:visited {
                background-color: @secondary-accent-color;

                &:hover {
                  background-color: darken(@secondary-accent-color, 10%)
                }

              }

              &:hover {
                background-color: darken(@main-accent-color, 10%)
              }

            }

            &:nth-child(2) {
              .transition(all .2s ease-in);
              position: absolute;
              top: 5px;
              right: 35px;
              color: transparent;
            }

          }

        }

        .template-stats {

          div {
            .ellipsis();
            .icon();
            .transition(all .2s ease-in);
            position: absolute;
            right: -155px;
            bottom: 40px;
            width: 190px;
            border-radius: 20px;
            color: transparent;
            line-height: 35px;
            cursor: pointer;
            border: 1px solid transparent;

            &:before {
              color: @main-accent-color!important;
            }

            &:hover {
              box-shadow: 1px 2px 2px rgba(0, 0, 0, 0.3);
              color: @text-color;
              z-index: 99;
              border: 1px solid @main-accent-color;
              background-color: #FFF;
            }

          }

          div:first-child {
            .icon-lite(@icon-download-alt);
            bottom: 5px;
          }

          div:last-child {
            .icon-lite(@icon-indent-left);
          }

        }

        &:nth-child(3n) .template-stats div {
          right: -5px;
          width: auto;

          &:before {
            float: right;
            margin-left: 10px;
            line-height: 37px;
          }

          &:hover {
            width: auto;
          }

        }

        &:hover .template-actions a:nth-child(2) {
          color: @secondary-accent-color;
        }

      }

    }

  }

  & > form {
    margin: 20px;

    label {
      display: block;
      margin-bottom: 5px;
      font-weight: 500;
    }

    input[type="text"], textarea {
      .box-sizing(border-box);
      .transition(all .2s ease-in);
      padding: 5px;
      border: 1px solid lighten(@secondary-accent-color, 15%);
      border-radius: 3px;
      background-color: lighten(@secondary-accent-color, 48%);
      margin-bottom: 20px;

      &:focus {
        outline: none;
        border-color: darken(@secondary-accent-color, 10%)
      }

    }

    input[type="text"] {
      min-width: 200px;
      width: 50%;
      font-size: 15px;
    }

    textarea {
      width: 100%;
      height: 90px;
    }

    input.button {
      display: block;
      font-size: 20px;

      &:focus {
        outline: none;
        background-color: darken(@secondary-accent-color, 10%)
      }

    }

    br {
      display: none;
    }

    &[action^="http://twittard.piradoiv.com/templates/update/"] {

      & ~ h3 {
        margin: 40px 20px 0;
        border-bottom: 1px solid #FFF;
        box-shadow: 0px 1px 0 fade(#000, 6%);
        color: @secondary-accent-color;
        text-shadow: 0px 2px 0 darken(@secondary-accent-color, 15%), 0px 5px 3px rgba(0,0,0,0.15);
        font-size: 32px;
      }

      & ~ a {
        .button();
        display: inline-block;
        margin: 20px;
        font-size: 20px;

        &:focus {
          outline: none;
          background-color: darken(@secondary-accent-color, 10%)
        }

      }

      & ~ ul {
        overflow: hidden;
        margin: 0 0 20px 20px;

        li {
          float: left;
          margin-right: 20px;

          a {
            .icon-full(@icon-pencil);
          }

        }

      }

    }

    .CodeMirror {
      margin: 0 0 20px 10px;
      border: 1px solid lighten(@secondary-accent-color, 15%);
      border-radius: 3px;

      & ~ p input {
        margin-left: 10px;
      }

    }

  }

  a[href^="http://twittard.piradoiv.com/templates/delete_css/"] {
    .icon-full(@icon-remove);
    position: absolute;
    right: 20px;
    bottom: 28px;
    color: @main-accent-color;
  }

  & > a[href^="http://twittard.piradoiv.com/templates/edit/"] {
    .icon-full(@icon-arrow-left);
    position: absolute;
    right: 20px;
    top: 60px;
    color: @text-color;

    &:hover {
      color: @main-accent-color;
    }

  }

}

.animated() {
  -webkit-animation-fill-mode:both;
  -moz-animation-fill-mode:both;
  -ms-animation-fill-mode:both;
  -o-animation-fill-mode:both;
  animation-fill-mode:both;
  -webkit-animation-duration:.8s;
  -moz-animation-duration:.8s;
  -ms-animation-duration:.8s;
  -o-animation-duration:.8s;
  animation-duration:.8s;
  -webkit-animation-delay:.8s;
  -moz-animation-delay:.8s;
  -ms-animation-delay:.8s;
  -o-animation-delay:.8s;
  animation-delay:.8s;
}

@-webkit-keyframes bounceIn {
  0% { opacity: 0; -webkit-transform: scale(.3); }
  50% { opacity: 1; -webkit-transform: scale(1.05); }
  70% { -webkit-transform: scale(.9); }
  100% { -webkit-transform: scale(1); }
}

@-moz-keyframes bounceIn {
  0% { opacity: 0; -moz-transform: scale(.3); }
  50% { opacity: 1; -moz-transform: scale(1.05); }
  70% { -moz-transform: scale(.9); }
  100% { -moz-transform: scale(1)  }
}

@-o-keyframes bounceIn {
  0% { opacity: 0; -o-transform: scale(.3); }
  50% { opacity: 1; -o-transform: scale(1.05); }
  70% { -o-transform: scale(.9); }
  100% { -o-transform: scale(1); }
}

@keyframes bounceIn {
  0% { opacity: 0; transform: scale(.3); }
  50% { opacity: 1; transform: scale(1.05); }
  70% { transform: scale(.9); }
  100% { transform: scale(1); }
}

.bounceIn() {
  -webkit-animation-name: bounceIn;
  -moz-animation-name: bounceIn;
  -o-animation-name: bounceIn;
  animation-name: bounceIn;
}


// Mixins import and variables
// ----------------------------

@main-bg-color: lighten(#D1EEFC, 6%);
@secondary-bg-color: #D1EEFC;
@main-accent-color: #FF2D55;
@secondary-accent-color: #16D6D9;
@text-color: lighten(#1F1F21, 30%);
@secondary-text-color: #FDFDFD;
@link-color: #1F1F21;
@link-hover-color: @main-accent-color;

.button() {
  .transition(all .1s ease-in);
  padding: 3px 7px;
  border: 0;
  border-bottom: 2px solid fade(#000, 20%);
  border-radius: 3px;
  background-color: @secondary-accent-color;
  color: @secondary-text-color;
  text-shadow: 0 -1px 1px rgba(0, 0, 0, 0.2);
  cursor: pointer;

  &:hover {
    background-color: darken(@secondary-accent-color, 10%)
  }

}

.ellipsis {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.transition(@transition) {
  transition: @transition;
  -ms-transition: @transition;
  -moz-transition: @transition;
  -webkit-transition: @transition;
}

.box-sizing(@box-sizing) {
  box-sizing: @box-sizing;
  -moz-box-sizing: @box-sizing;
}

.transform-scale(@scale) {
  transform: scale(@scale);
  -ms-transform: scale(@scale);
  -webkit-transform: scale(@scale);
}

@charset 'UTF-8';
@font-face {
  font-family: 'FontAwesome';
  font-style: 'normal';
  font-weight: 'normal';
  src: url('http://weloveiconfonts.com/api/fonts/fontawesome/fontawesome-webfont.eot');
  src: url('http://weloveiconfonts.com/api/fonts/fontawesome/fontawesome-webfont.eot?#iefix') format('eot'),
  url('http://weloveiconfonts.com/api/fonts/fontawesome/fontawesome-webfont.woff') format('woff'),
  url('http://weloveiconfonts.com/api/fonts/fontawesome/fontawesome-webfont.ttf') format('truetype'),
  url('http://weloveiconfonts.com/api/fonts/fontawesome/fontawesome-webfont.svg#FontAwesomeRegular') format('svg');
}

// https://github.com/FortAwesome/Font-Awesome/pull/53
// .icon base class to use with .icon-lite() mixin
.icon {

  &:before {
    display: inline-block;
    vertical-align: middle;
    text-align: center;
    font-weight: normal;
    font-style: normal;
    font-family: FontAwesome;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }

}

// .icon-full mixin, adds an icon to any css selector
.icon-full(@type, @size: 1, @position: before, @color: inherit, @margin: 0.2em) {

  &:before {
    display: inline-block;
    margin-right: @margin;
    width: 1em;
    color: @color;
    content: @type;
    vertical-align: middle;
    text-align: center;
    font-weight: normal;
    font-style: normal;
    font-size: @size * 1em;
    font-family: FontAwesome;
    line-height: 1em;
    line-height: 1em / @size;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }

}

// .icon-lite mixin, like .icon-full(), but less code and requires .icon class on all html elements that use it
.icon-lite(@type, @size: 1, @color: inherit, @margin: 0.2em) {

  &:before {
    margin-right: @margin;
    color: @color;
    content: @type;
    font-size: @size * 1em;
    line-height: 1em / @size;
  }

}

//variables to use with the .icon() mixin.
@icon-heart: "\f004";
@icon-user: "\f007";
@icon-remove: "\f00d";
@icon-off: "\f011";
@icon-cog: "\f013";
@icon-home: "\f015";
@icon-download-alt: "\f019";
@icon-pencil: "\f040";
@icon-edit: "\f044";
@icon-question-sign: "\f059";
@icon-arrow-left: "\f060";
@icon-plus: "\f067";
@icon-indent-left: "\f03b";
@icon-twitter-sign: "\f081";
@icon-trophy: "\f091";