base.css

html,
body {
  margin: 0;
  padding: 0;
}

button {
  margin: 0;
  padding: 0;
  border: 0;
  background: none;
  font-size: 100%;
  vertical-align: baseline;
  font-family: inherit;
  color: inherit;
  -webkit-appearance: none;
  /*-moz-appearance: none;*/
  -ms-appearance: none;
  -o-appearance: none;
  appearance: none;
}

body {
  font: 14px 'Helvetica Neue', Helvetica, Arial, sans-serif;
  line-height: 1.4em;
        background: #eaeaea url('bg.png');
  color: #4d4d4d;
  width: 550px;
  margin: 0 auto;
  -webkit-font-smoothing: antialiased;
  -moz-font-smoothing: antialiased;
  -ms-font-smoothing: antialiased;
  -o-font-smoothing: antialiased;
  font-smoothing: antialiased;
}

/*
TODO(jmesserly): we should try to restore the original CSS file.
Ours has diverged and some features aren't working anymore, mainly due to the
extra nodes we introduce for items.
*/

#todoapp {
  background: #fff;
  background: rgba(255, 255, 255, 0.9);
  margin: 130px 0 40px 0;
  border: 1px solid #ccc;
  position: relative;
  border-top-left-radius: 2px;
  border-top-right-radius: 2px;
  box-shadow: 0 2px 6px 0 rgba(0, 0, 0, 0.2),
        0 25px 50px 0 rgba(0, 0, 0, 0.15);
}

#todoapp:before {
  content: '';
  border-left: 1px solid #f5d6d6;
  border-right: 1px solid #f5d6d6;
  width: 2px;
  position: absolute;
  top: 0;
  left: 40px;
  height: 100%;
}

input::-webkit-input-placeholder {
  font-style: italic;
}

input:-moz-placeholder {
  font-style: italic;
  color: #a9a9a9;
}

.title {
  position: absolute;
  top: -120px;
  width: 100%;
  font-size: 70px;
  font-weight: bold;
  text-align: center;
  color: #b3b3b3;
  color: rgba(255, 255, 255, 0.3);
  text-shadow: -1px -1px rgba(0, 0, 0, 0.2);
  -webkit-text-rendering: optimizeLegibility;
  -moz-text-rendering: optimizeLegibility;
  -ms-text-rendering: optimizeLegibility;
  -o-text-rendering: optimizeLegibility;
  text-rendering: optimizeLegibility;
}

#header {
  padding-top: 15px;
  border-radius: inherit;
}

#header:before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 15px;
  z-index: 2;
  border-bottom: 1px solid #6c615c;
  background: #8d7d77;
  background: -webkit-gradient(linear, left top, left bottom, from(rgba(132, 110, 100, 0.8)),to(rgba(101, 84, 76, 0.8)));
  background: -webkit-linear-gradient(top, rgba(132, 110, 100, 0.8), rgba(101, 84, 76, 0.8));
  background: -moz-linear-gradient(top, rgba(132, 110, 100, 0.8), rgba(101, 84, 76, 0.8));
  background: -o-linear-gradient(top, rgba(132, 110, 100, 0.8), rgba(101, 84, 76, 0.8));
  background: -ms-linear-gradient(top, rgba(132, 110, 100, 0.8), rgba(101, 84, 76, 0.8));
  background: linear-gradient(top, rgba(132, 110, 100, 0.8), rgba(101, 84, 76, 0.8));
  filter: progid:DXImageTransform.Microsoft.gradient(GradientType=0,StartColorStr='#9d8b83', EndColorStr='#847670');
  border-top-left-radius: 1px;
  border-top-right-radius: 1px;
}

#new-todo,
.edit {
  position: relative;
  margin: 0;
  width: 100%;
  font-size: 24px;
  font-family: inherit;
  line-height: 1.4em;
  border: 0;
  outline: none;
  color: inherit;
  padding: 6px;
  border: 1px solid #999;
  box-shadow: inset 0 -1px 5px 0 rgba(0, 0, 0, 0.2);
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  -ms-box-sizing: border-box;
  -o-box-sizing: border-box;
  box-sizing: border-box;
  -webkit-font-smoothing: antialiased;
  -moz-font-smoothing: antialiased;
  -ms-font-smoothing: antialiased;
  -o-font-smoothing: antialiased;
  font-smoothing: antialiased;
}

#new-todo {
  padding: 16px 16px 16px 60px;
  border: none;
  background: rgba(0, 0, 0, 0.02);
  z-index: 2;
  box-shadow: none;
}

#main {
  position: relative;
  z-index: 2;
  border-top: 1px dotted #adadad;
}

label[for='toggle-all'] {
  display: none;
}

#toggle-all {
  position: absolute;
  top: -42px;
  left: -4px;
  width: 40px;
  text-align: center;
  border: none; /* Mobile Safari */
}

#toggle-all:before {
  content: '»';
  font-size: 28px;
  color: #d9d9d9;
  padding: 0 25px 7px;
}

#toggle-all:checked:before {
  color: #737373;
}

#todo-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.todo-item {
  position: relative;
  font-size: 24px;
  border-bottom: 1px dotted #ccc;
}

/*
TODO(jmesserly): fix this. It's broken in our sample.

#todo-list x-todo-row:last-child .todo-item {
  border-bottom: none;
}
*/

.todo-item.editing {
  border-bottom: none;
  padding: 0;
}

/*
TODO(jmesserly): it seems to be impossible to have selectors that span a
ShadowRoot transition, even with allow-author-styles set. Various workarounds
are included in the code below.
*/
.edit.editing {
  display: block;
  width: 506px;
  padding: 13px 17px 12px 17px;
  margin: 0 0 0 43px;
}

.todo-item .toggle {
  text-align: center;
  width: 40px;
  /* auto, since non-WebKit browsers don't support input styling */
  height: auto;
  position: absolute;
  top: 0;
  bottom: 0;
  margin: auto 0;
  border: none; /* Mobile Safari */
  -webkit-appearance: none;
  /*-moz-appearance: none;*/
  -ms-appearance: none;
  -o-appearance: none;
  appearance: none;
}

.todo-item .toggle:after {
  content: '✔';
  line-height: 43px; /* 40 + a couple of pixels visual adjustment */
  font-size: 20px;
  color: #d9d9d9;
  text-shadow: 0 -1px 0 #bfbfbf;
}

.todo-item .toggle:checked:after {
  color: #85ada7;
  text-shadow: 0 1px 0 #669991;
  bottom: 1px;
  position: relative;
}

/*
TODO(jmesserly): the ".todo-item label" selector does not work with real
ShadowRoot because it crosses the shadow boundary.
*/
.edit-label {
  word-break: break-word;
  margin: 15px 15px 15px 60px;
  display: inline-block;
  line-height: 1.2;
  -webkit-transition: color 0.4s;
  -moz-transition: color 0.4s;
  -ms-transition: color 0.4s;
  -o-transition: color 0.4s;
  transition: color 0.4s;
}

.todo-item.completed x-editable-label {
  color: #a9a9a9;
  text-decoration: line-through;
}

.edit-label {
  text-decoration: inherit;
}

.todo-item .destroy {
  display: none;
  position: absolute;
  top: 0;
  right: 10px;
  bottom: 0;
  width: 40px;
  height: 40px;
  margin: auto 0;
  font-size: 22px;
  color: #a88a8a;
  -webkit-transition: all 0.2s;
  -moz-transition: all 0.2s;
  -ms-transition: all 0.2s;
  -o-transition: all 0.2s;
  transition: all 0.2s;
}

.todo-item .destroy:hover {
  text-shadow: 0 0 1px #000,
         0 0 10px rgba(199, 107, 107, 0.8);
  -webkit-transform: scale(1.3);
  -moz-transform: scale(1.3);
  -ms-transform: scale(1.3);
  -o-transform: scale(1.3);
  transform: scale(1.3);
}

.todo-item .destroy:after {
  content: '✖';
}

.todo-item:hover .destroy {
  display: block;
}

.todo-item.editing .destroy,
.todo-item.editing .toggle {
  display: none;
}

.todo-item.editing:last-child {
  margin-bottom: -1px;
}

#footer {
  color: #777;
  padding: 0 15px;
  position: absolute;
  right: 0;
  bottom: -31px;
  left: 0;
  z-index: 1;
  text-align: center;
}

#footer:before {
  content: '';
  position: absolute;
  right: 0;
  bottom: 31px;
  left: 0;
  height: 100px;
  z-index: -1;
  box-shadow: 0 1px 1px rgba(0, 0, 0, 0.3),
        0 6px 0 -3px rgba(255, 255, 255, 0.8),
        0 7px 1px -3px rgba(0, 0, 0, 0.3),
        0 42px 0 -6px rgba(255, 255, 255, 0.8),
        0 43px 2px -6px rgba(0, 0, 0, 0.2);
}

#todo-count {
  float: left;
  text-align: left;
}

#filters {
  margin: 0;
  padding: 0;
  list-style: none;
  position: absolute;
  right: 0;
  left: 0;
}

#filters li {
  display: inline;
}

#filters li a {
  color: #83756f;
  margin: 2px;
  text-decoration: none;
}

#filters li a.selected {
  font-weight: bold;
}

#clear-completed {
  float: right;
  line-height: 20px;
  text-decoration: none;
  background: rgba(0, 0, 0, 0.1);
  font-size: 11px;
  padding: 0 10px;
  position: relative;
  border-radius: 3px;
  box-shadow: 0 -1px 0 0 rgba(0, 0, 0, 0.2);
}

#clear-completed:hover {
  background: rgba(0, 0, 0, 0.15);
  box-shadow: 0 -1px 0 0 rgba(0, 0, 0, 0.3);
}

#info {
  margin: 65px auto 0;
  color: #a6a6a6;
  font-size: 12px;
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.7);
  text-align: center;
}

#info a {
  color: inherit;
}

/*
  Hack to remove background from Mobile Safari.
  Can't use it globally since it destroys checkboxes in Firefox and Opera
*/
@media screen and (-webkit-min-device-pixel-ratio:0) {
  #toggle-all,
  .todo-item .toggle {
    background: none;
  }
  #todo-item .toggle {
    height: 40px;
  }

  #toggle-all {
    top: -56px;
    left: -15px;
    width: 65px;
    height: 41px;
    -webkit-transform: rotate(90deg);
    transform: rotate(90deg);
    -webkit-appearance: none;
    appearance: none;
  }
}