/* Constants */

:root {
  --icon-size: 24px;
  --primary-color: #4285f4;
  --peer-width: 120px;
  --text-color: #333;
  --bg-color: #fafafa;
  --bg-color-secondary: #f1f3f4;
}

/* Layout */

html {
  height: 100%;
}

html,
body {
  margin: 0;
  display: flex;
  flex-direction: column;
  width: 100%;
  overflow-x: hidden;
}

body {
  flex-grow: 1;
  align-items: center;
  justify-content: center;
  overflow-y: hidden;
}

.row-reverse {
  display: flex;
  flex-direction: row-reverse;
}

.row {
  display: flex;
  flex-direction: row;
}

.column {
  display: flex;
  flex-direction: column;
}

.center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.grow {
  flex-grow: 1;
}

.full {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
}

header {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 56px;
  align-items: center;
  padding: 16px;
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

/* Typography */

body {
  font-family:
    -apple-system, BlinkMacSystemFont, Roboto, "Segoe UI", Helvetica, Arial,
    sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1 {
  font-size: 34px;
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 40px;
  margin: 8px 0 0;
}

h2 {
  font-size: 24px;
  font-weight: 400;
  letter-spacing: -0.012em;
  line-height: 32px;
}

h3 {
  font-size: 20px;
  font-weight: 500;
  margin: 16px 0;
}

.font-subheading {
  font-size: 16px;
  font-weight: 400;
  line-height: 24px;
  word-break: break-all;
}

.font-body1,
body {
  font-size: 14px;
  font-weight: 400;
  line-height: 20px;
}

.font-body2 {
  font-size: 12px;
  line-height: 18px;
}

a {
  text-decoration: none;
  color: currentColor;
  cursor: pointer;
}

/* Icons */

.icon {
  width: var(--icon-size);
  height: var(--icon-size);
  fill: currentColor;
}

/* Shadows */

[shadow="1"] {
  box-shadow:
    0 3px 4px 0 rgba(0, 0, 0, 0.14),
    0 1px 8px 0 rgba(0, 0, 0, 0.12),
    0 3px 3px -2px rgba(0, 0, 0, 0.4);
}

[shadow="2"] {
  box-shadow:
    0 4px 5px 0 rgba(0, 0, 0, 0.14),
    0 1px 10px 0 rgba(0, 0, 0, 0.12),
    0 2px 4px -1px rgba(0, 0, 0, 0.4);
}

/* Animations */

@keyframes fade-in {
  0% {
    opacity: 0;
  }
}

/* Main Header */

body > header a {
  margin-left: 8px;
}

/* Peers List */

x-peers {
  width: 100%;
  overflow: hidden;
  flex-flow: row wrap;
  z-index: 2;
}

/* Empty Peers List */

x-no-peers {
  padding: 8px;
  text-align: center;
  /* prevent flickering on load */
  animation: fade-in 300ms;
  animation-delay: 500ms;
  animation-fill-mode: backwards;
}

x-no-peers h2,
x-no-peers a {
  color: var(--primary-color);
}

x-peers:not(:empty) + x-no-peers {
  display: none;
}

/* Peer */

x-peer {
  -webkit-user-select: none;
  user-select: none;
}

x-peer label {
  width: var(--peer-width);
  padding: 8px;
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
  position: relative;
}

x-peer .name {
  width: var(--peer-width);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  text-align: center;
}

input[type="file"] {
  visibility: hidden;
  position: absolute;
}

x-peer x-icon {
  --icon-size: 40px;
  width: var(--icon-size);
  padding: 12px;
  border-radius: 50%;
  background: var(--primary-color);
  color: white;
  display: flex;
  margin-bottom: 8px;
  transition: transform 150ms;
  will-change: transform;
}

x-peer:not([transfer]):hover x-icon,
x-peer:not([transfer]):focus x-icon {
  transform: scale(1.05);
}

x-peer[transfer] x-icon {
  box-shadow: none;
  opacity: 0.8;
  transform: scale(1);
}

.status,
.device-name {
  height: 18px;
  opacity: 0.7;
}

x-peer[transfer] .status:before {
  content: "Transferring...";
}

x-peer:not([transfer]) .status,
x-peer[transfer] .device-name {
  display: none;
}

x-peer x-icon {
  animation: pop 600ms ease-out 1;
}

@keyframes pop {
  0% {
    transform: scale(0.7);
  }

  40% {
    transform: scale(1.2);
  }
}

x-peer[drop] x-icon {
  transform: scale(1.1);
}

/* Footer */

footer {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  align-items: center;
  padding: 0 0 16px 0;
  text-align: center;
}

footer .logo {
  --icon-size: 80px;
  margin-bottom: 8px;
  color: var(--primary-color);
}

footer .font-body2 {
  color: var(--primary-color);
}

@media (min-height: 800px) {
  footer {
    margin-bottom: 16px;
  }
}

/* Dialog */

x-dialog x-background {
  background: rgba(0, 0, 0, 0.61);
  z-index: 10;
  transition: opacity 300ms;
  will-change: opacity;
  padding: 16px;
}

x-dialog x-paper {
  z-index: 3;
  background: white;
  border-radius: 8px;
  padding: 16px 24px;
  width: 100%;
  max-width: 400px;
  box-sizing: border-box;
  transition: transform 300ms;
  will-change: transform;
}

x-dialog:not([show]) {
  pointer-events: none;
}

x-dialog:not([show]) x-paper {
  transform: scale(0.1);
}

x-dialog:not([show]) x-background {
  opacity: 0;
}

x-dialog .row-reverse > .button {
  margin-top: 16px;
  margin-left: 8px;
}

x-dialog a {
  color: var(--primary-color);
}

/* Receive Dialog */
#receiveDialog .row {
  margin-top: 24px;
  margin-bottom: 8px;
}

/* Receive Text Dialog */

#receiveTextDialog #text {
  width: 100%;
  word-break: break-all;
  max-height: 300px;
  overflow-x: hidden;
  overflow-y: auto;
  -webkit-user-select: all;
  -moz-user-select: all;
  user-select: all;
  white-space: pre-wrap;
}

#receiveTextDialog #text a {
  cursor: pointer;
}

#receiveTextDialog #text a:hover {
  text-decoration: underline;
}

#receiveTextDialog h3 {
  /* Select the received text when double-clicking the dialog */
  user-select: none;
  pointer-events: none;
}

/* Button */

.button {
  padding: 0 16px;
  box-sizing: border-box;
  min-height: 36px;
  min-width: 100px;
  font-size: 14px;
  line-height: 24px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  white-space: nowrap;
  cursor: pointer;
  user-select: none;
  background: inherit;
  color: var(--primary-color);
}

.button,
.icon-button {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
  touch-action: manipulation;
  border: none;
  outline: none;
}

.button:before,
.icon-button:before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: currentColor;
  opacity: 0;
  transition: opacity 300ms;
}

.button:hover:before,
.icon-button:hover:before {
  opacity: 0.1;
}

.button:before {
  border-radius: 8px;
}

.button:focus:before,
.icon-button:focus:before {
  opacity: 0.2;
}

button::-moz-focus-inner {
  border: 0;
}

/* Icon Button */

.icon-button {
  width: 40px;
  height: 40px;
}

.icon-button:before {
  border-radius: 50%;
}

/* Text Input */

.textarea {
  box-sizing: border-box;
  border: none;
  outline: none;
  padding: 16px 24px;
  border-radius: 16px;
  margin: 8px 0;
  font-size: 14px;
  font-family: inherit;
  background: #f1f3f4;
  display: block;
  overflow: auto;
  resize: none;
  min-height: 40px;
  line-height: 16px;
  max-height: 300px;
}

/* Info Animation */

#about {
  color: white;
  z-index: 11;
  overflow: hidden;
  pointer-events: none;
  text-align: center;
}

#about .fade-in {
  transition: opacity 300ms;
  will-change: opacity;
  transition-delay: 300ms;
  z-index: 11;
  pointer-events: all;
}

#about:not(:target) .fade-in {
  opacity: 0;
  pointer-events: none;
  transition-delay: 0;
}

#about .logo {
  --icon-size: 96px;
}

#about x-background {
  position: absolute;
  top: calc(32px - 200px);
  right: calc(32px - 200px);
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: var(--primary-color);
  transform: scale(0);
  z-index: -1;
}

/* Hack such that initial scale(0) isn't animated */
#about x-background {
  will-change: transform;
  transition: transform 800ms cubic-bezier(0.77, 0, 0.175, 1);
}

#about:target x-background {
  transform: scale(12);
}

#about .row a {
  margin: 8px 8px -16px;
}

/* Loading Indicator */

.progress {
  width: 80px;
  height: 80px;
  position: absolute;
  top: 0px;
  clip: rect(0px, 80px, 80px, 40px);
  --progress: rotate(0deg);
  transition: transform 200ms;
}

.circle {
  width: 72px;
  height: 72px;
  border: 4px solid var(--primary-color);
  border-radius: 40px;
  position: absolute;
  clip: rect(0px, 40px, 80px, 0px);
  will-change: transform;
  transform: var(--progress);
}

.over50 {
  clip: rect(auto, auto, auto, auto);
}

.over50 .circle.right {
  transform: rotate(180deg);
}

/* Generic placeholder */
[placeholder]:empty:before {
  content: attr(placeholder);
}

/* Toast */

.toast-container {
  padding: 0 8px 24px;
  overflow: hidden;
  pointer-events: none;
}

x-toast {
  position: absolute;
  min-height: 48px;
  bottom: 24px;
  width: 100%;
  max-width: 344px;
  background-color: #323232;
  color: rgba(255, 255, 255, 0.95);
  align-items: center;
  box-sizing: border-box;
  padding: 8px 24px;
  z-index: 20;
  transition: opacity 200ms, transform 300ms ease-out;
  cursor: default;
  line-height: 24px;
  border-radius: 8px;
  pointer-events: all;
}

x-toast:not([show]):not(:hover) {
  opacity: 0;
  transform: translateY(100px);
}

/* Instructions */

x-instructions {
  position: absolute;
  top: 120px;
  opacity: 0.5;
  transition: opacity 300ms;
  z-index: -1;
  text-align: center;
}

x-instructions:before {
  content: attr(mobile);
}

x-peers:empty ~ x-instructions {
  opacity: 0;
}

/* Responsive Styles */

@media (min-height: 800px) {
  footer {
    margin-bottom: 16px;
  }
}

@media screen and (min-height: 800px), screen and (min-width: 1100px) {
  x-instructions:before {
    content: attr(desktop);
  }
}

@media (max-height: 420px) {
  x-instructions {
    top: 24px;
  }

  footer .logo {
    --icon-size: 40px;
  }
}

/* 
    iOS specific styles
*/
@supports (-webkit-overflow-scrolling: touch) {
  html {
    position: fixed;
  }

  x-instructions:before {
    content: attr(mobile);
  }
}

/*
    Color Themes
*/

/* Default colors */
body {
  --text-color: #333;
  --bg-color: #fafafa;
  --bg-color-secondary: #f1f3f4;
}

/* Colored Elements */
body {
  color: var(--text-color);
  background-color: var(--bg-color);
  transition: background-color 0.5s ease;
}

x-dialog x-paper {
  background-color: var(--bg-color);
}

.textarea {
  color: var(--text-color);
  background-color: var(--bg-color-secondary);
}
/* Image Preview */
#img-preview {
  max-width: 100%;
  max-height: 50vh;
  margin: auto;
  display: block;
}

/* 
    Edge specific styles
*/
@supports (-ms-ime-align: auto) {
  html,
  body {
    overflow: hidden;
  }
}