:root {
  --accent: #008000;
  --accent-dark: #006000;
  --accent-darker: #004000;
  --accent-bg: #DDFFDD;
  --font-main: 16px "Segoe UI", "Arial", sans-serif;
  --simon-highlight-click: #05F;
  --simon-highlight-correct: #0C0;
  --simon-highlight-gameover: #F00;
}

body {
  font-family: "Segoe UI", "Arial", sans-serif;
  background: fixed no-repeat right -200px bottom -300px / 800px url("rotator.svg"), var(--accent-bg);
  transition: background 100ms;
}

.thumping {
  animation: 800ms linear 0s infinite normal both running thumping;
  overflow: hidden;
}

@keyframes thumping {
  0% {transform: translate(5px, 0);}
  3% {transform: translate(-5px, 5px);}
  6% {transform: translate(0, -5px);}
  9% {transform: translate(-5px, 5px);}
  12% {transform: translate(5px, 5px);}
  15% {transform: none;}
  100% {transform: none;}
}v

main {
  padding: 10px;
}

header {
  height: 50px;
  border-bottom: 2px solid #00600080;
  padding-bottom: 10px;
}

nav ul li {
  list-style: none;
  background: transparent;
  border: 2px solid var(--accent-dark);
  border-radius: 4px;
  color: var(--accent-dark);
  cursor: pointer;
  text-align: center;
  float: left;
  transition: background 200ms, color 200ms;
}

nav ul li:hover,
nav ul li:active,
.nav-selected {
  background: var(--accent-dark);
  color: #FFF;
}

nav ul li:active {
  transform: scale(0.9);
}

nav ul li a {
  color: inherit;
  text-decoration: none;
  font-weight: bold;
  display: inline-block;
  width: 100px;
  padding: 10px;
}

nav ul li:not(:first-child) {
  margin-left: 10px;
}

.btn {
  background: var(--accent);
  border: 1px solid var(--accent-dark);
  color: #FFF;
  border-radius: 8px;
  min-width: 100px;
  height: 40px;
  box-sizing: border-box;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 5px 10px;
  font: var(--font-main);
  cursor: pointer;
  text-align: center;
  text-decoration: none;
  user-select: none;
}

.btn:hover {
  background: var(--accent-dark);
}

.btn:active {
  background: var(--accent-darker);
}

.btnbar {
  display: flex;
  gap: 10px;
  margin-top: 10px;
  margin-bottom: 10px;
}

#logo {
  position: relative;
  width: 700px;
  height: 350px;
  display: inline-block;
}

#logo_0:not(.logo-g-party), #logo_1:not(.logo-g-party) {
  stroke: green;
}

.logo-svg {
  position: absolute;
  top: 0;
  left: 0;
}

.noscroll {
  overflow: hidden;
}

.centered {
  text-align: center;
}

.underlined {
  text-decoration: underline;
  cursor: pointer;
}

hr {
  border: 1px solid #006000;
}

section {
  display: none;
}

.sec-shown {
  display: block;
}

#style_switch_btn {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 50px;
  height: 50px;
  background: transparent;
  color: var(--accent-dark);
  border: 2px solid var(--accent-dark);
  border-radius: 25px;
  font: 12px "Segoe UI";
}

#style_switch_btn:hover {
  background: var(--accent-dark);
  color: #FFF;
}

#style_switch_btn:active {
  transform: scale(0.9) rotateX(15deg);
}

#hello_msg_1, #hello_msg_2 {
  font-size: 40px;
  color: #006000;
  transition: color 100ms;
}

#hello_msg_1 {
  transform: translate(0, 50px);
}

#hello_msg_2 {
  margin-top: 20px;
  transition: opacity 500ms, transform 500ms;
  margin-bottom: 30px;
  animation: 200ms ease-in 2500ms 1 normal both running fadein;
}

@keyframes fadein {
  0% {opacity: 0; transform: scale(2);}
  100% {opacity: 1; transform: none;}
}

.cards, .cards2 {
  display: grid;
  grid-template: repeat(auto-fill, 320px) / repeat(auto-fill, 320px);
  gap: 20px;
}

.card, .card2 {
  display: inline-block;
  padding: 0;
  background: var(--accent-bg);
  border-radius: 16px;
  border: none;
  width: 320px;
  height: 320px;
  margin: auto 10px 10px auto;
  box-shadow: 0 2px 10px 2px #555;
  transition: box-shadow 300ms, transform 300ms;
  position: relative;
}

.card:nth-child(1):not(.simon), .card2 {animation: 300ms ease-in 0s 1 normal backwards running spinin;}
.card:nth-child(2):not(.simon), .card2 {animation: 300ms ease-in 30ms 1 normal backwards running spinin;}
.card:nth-child(3):not(.simon), .card2 {animation: 300ms ease-in 60ms 1 normal backwards running spinin;}
.card:nth-child(4):not(.simon), .card2 {animation: 300ms ease-in 90ms 1 normal backwards running spinin;}
.card:nth-child(5):not(.simon), .card2 {animation: 300ms ease-in 120ms 1 normal backwards running spinin;}

@keyframes spinin {
  0% {opacity: 0; transform: rotate(-30deg) scale(1.1);}
  100% {opacity: 1; transform: none;}
}

.card:hover, .card2:hover {
  box-shadow: 0 5px 20px 5px #555;
}

.card:nth-child(odd):hover, .card2:nth-child(odd):hover {
  transform: translate(0, -5px) rotate(1deg);
}

.card:nth-child(even):hover, .card2:nth-child(even):hover {
  transform: translate(0, -5px) rotate(-1deg);
}

.card h3, .card2 h3 {
  margin: 0;
  font-size: 20px;
}

.card p, .card2 p {
  width: 200px;
  display: inline-block;
  font-size: 14px;
  margin: 0;
}

.card img, .card2 img {
  border-radius: 16px 16px 0 0;
  width: 320px;
}

.card .btn, .card2 .btn {
  position: absolute;
  bottom: 10px;
  right: 10px;
}

.card .card-content, .card2 .card-content {
  padding: 5px 0 10px 10px;
  font-size: 14px;
}

.twocol-wrapper {
  display: grid;
  grid-template: 1fr / 1fr 1fr;
  gap: 20px;
  text-align: center;
}

.twocol .btnbar {
  justify-content: center;
}

.partyframe {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  animation: 500ms linear 0s 1 normal both running partyframe;
}

@keyframes partyframe {
  0% {transform: none; opacity: 1;}
  100% {transform: scale(0); opacity: 0;}
}

.logo-party {
  animation: 400ms linear 200ms infinite alternate none running logo-party;
}

@keyframes logo-party {
  0% {transform: none;}
  100% {transform: scale(1.2);}
}

.half-width {
  max-width: 1000px;
  margin: 0 auto;
}

.text-centered {
  text-align: center;
  justify-content: center;
}

.hidden {
  opacity: 0;
}

.hover-hidden {
  transition: opacity 1s;
  cursor: help;
}

.simon-highlight {
  animation: 500ms ease-in 0s 1 normal both running simon-highlight;
}

@keyframes simon-highlight {
  0% {background: inherit;}
  50% {background: var(--simon-highlight-click);}
  100% {background: inherit;}
}

.simon-highlight-correct {
  animation: 700ms ease-in 0s 1 normal both running simon-highlight-correct;
}

@keyframes simon-highlight-correct {
  0% {background: inherit;}
  50% {background: var(--simon-highlight-correct);}
  100% {background: inherit;}
}

.simon-highlight-gameover {
  animation: 700ms ease-in 0s 1 normal both running simon-highlight-gameover;
}

@keyframes simon-highlight-gameover {
  0% {background: inherit;}
  50% {background: var(--simon-highlight-gameover);}
  100% {background: inherit;}
}

.heading-title {
  margin-bottom: 0;
}

.heading-subtitle {
  margin: 0 auto 15px 0;
}