:root {
  --dark-gray: #1e1e1e;
  --medium-gray: #565656;
  --light-gray: #cccccc;
  --canon-red: #cc0000;
  --dark-red: #990000;
  --darker-red: #660000;
  --deep-red: #330000;
  --btn-color: #d30000;
}

body {
  font-family: "myriad-pro", sans-serif;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

h1 {
  font-size: clamp(36px, 5vw, 56px);
  line-height: 107.143%;
}

h2 {
  font-size: clamp(24px, 4vw, 36px);
  color: var(--canon-red);
  line-height: 111.111%;
}

p {
  line-height: 120%;
  font-size: 20px;
}

.btn-primary {
  --bs-btn-bg: var(--btn-color);
  --bs-btn-border-color: var(--btn-color);
}

.btn-secondary {
  --bs-btn-bg: transparent;
  --bs-btn-border-color: #ffffff;
}

.btn-primary:active {
  --bs-btn-active-bg: var(--dark-red);
  --bs-btn-active-border-color: var(--dark-red);
}

.btn-primary:hover {
  --bs-btn-hover-bg: var(--dark-red);
  --bs-btn-hover-border-color: var(--dark-red);
}

.btn:disabled {
  --bs-btn-disabled-bg: var(--dark-red);
  --bs-btn-disabled-border-color: var(--dark-red);
}

@media (max-width: 769px) {
  .btn-secondary {
    width: 100% !important;
  }
}

.game-container {
  border: 1px solid var(--medium-gray);
  background: linear-gradient(180deg, #1e1e1e 0%, #000 100%);
  height: 100%;
  min-height: 90vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  padding: 24px !important;
}

@media (max-width: 767px) {
  .game-container {
    padding: 1.5rem !important;
  }
}

#game-intro {
  max-width: 1200px;
}

#instructions-container {
  border: 1px solid var(--medium-gray);
  background: linear-gradient(180deg, #1e1e1e 0%, #000 100%);
  display: flex;
  flex-direction: column;
  gap: 24px;
  max-width: 600px;
  min-height: 306px;
  cursor: pointer;
}

#instructions-container h1 {
  color: var(--canon-red);
}

#instructions-container p {
  font-size: clamp(16px, 3.2vw, 20px);
}

.pagination-dots {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 24px;
}

.pagination-dots .dot {
  border: 1px solid #565656;
  border-radius: 50%;
  height: 12px;
  width: 12px;
  background: #565656;
  transition: 0.3s all ease;
}

.pagination-dots .dot.active {
  background: transparent;
}

.border-primary {
  border: 1px solid var(--medium-gray) !important;
}

.w-90 {
  width: 90%;
}

/* Introduction Screen - Staggered Fade In  */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px); /* Start 20px lower */
  }
  to {
    opacity: 1;
    transform: translateY(0); /* End at its original position */
  }
}

.fade-in-item {
  opacity: 0;
  animation: fadeInUp 0.7s ease-out forwards;
}

.fade-in-item:nth-child(1) {
  animation-delay: 0.3s; /* Delay for grid icon */
}

.fade-in-item:nth-child(2) {
  animation-delay: 0.6s; /* Delay for headings */
}

.fade-in-item:nth-child(3) {
  animation-delay: 0.9s; /* Delay for paragraph */
}

.fade-in-item:nth-child(4) {
  animation-delay: 1.2s; /* Delay for btn */
}

/* Transition Between Screens */
.fade-out {
  opacity: 1;
  transition: opacity 0.5s ease-out;
}

.fade-out.hide {
  opacity: 0;
}

.fade-in {
  opacity: 0;
  transition: opacity 0.5s ease-in;
}

.fade-in.show {
  opacity: 1;
}

/* Game Play Screen - Game Board */
#game-play,
#game-play > div {
  flex: 1;
}

.header-message {
  flex: 1;
  max-width: 900px;
}

@media (min-width: 1380px) {
  #game-play .continue-btn {
    position: absolute;
    top: 0;
    right: 0;
  }

  .header-message {
    flex: 1;
    max-width: 900px;
    padding: 1.5rem 0;
  }
}

#game-play-header .continue-btn {
  align-self: end;
}

.game-board {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  width: 100%;
  max-width: 980px;
  margin-left: auto;
  margin-right: auto;
  max-height: 600px;
  position: relative;
  z-index: 20;
}

.game-board.game-started {
  pointer-events: all;
}

.game-board.game-started + #game-footer #game-start-container {
  display: none;
}

@media screen and (max-width: 1350px) {
  #start-game-btn {
    width: 50% !important;
  }
}

#mid-game-message {
  text-align: center;
}

.game-board.matches-found + #game-footer #mid-game-message {
  display: none;
}

@media (max-width: 767px) {
  .game-board {
    grid-template-columns: repeat(2, 1fr);
    flex: 1 1 auto;
    min-height: 400px;
  }
}

.game-board:not(.game-started) .game-board-item {
  pointer-events: none;
}

.game-board-item {
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  border: 1px solid var(--light-gray);
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  position: relative;
  overflow: hidden;
  transition: border 0.3s ease;
  max-height: 220px;
  background-color: rgb(0, 0, 0);
  min-height: 100px;
  transform-style: preserve-3d;
}

@media (min-width: 766px) {
  .game-board-item {
    aspect-ratio: 3 / 2;
  }
}

@media (max-width: 767px) {
  .game-board-item {
    min-height: 0;
    height: 100%;
  }
}

.game-board-item .item-front,
.game-board-item .item-back {
  width: 100%;
  height: 100%;
  position: absolute;
  backface-visibility: hidden;
  transition: transform 0.5s ease;
  transition-property: transform, height, width;
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
}

.game-board-item.found .item-front,
.game-board-item.found .item-back {
  height: 0;
  width: 0;
}

.game-board-item .item-front {
  z-index: 90;
  transform: rotateY(0);
}

.game-board-item .item-back {
  z-index: 80;
  transform: rotateY(180deg);
}

.game-board-item.selected .item-front {
  transform: rotateY(-180deg);
}

.game-board-item.selected .item-back {
  transform: rotateY(0);
}

.game-board-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1;
  transition: background-color 0.3s ease;
}

.game-board-item.found {
  background: transparent;
  background-image: none !important;
  border: none;
  pointer-events: none;
}

.game-board-item p {
  display: none;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 2;
  color: white;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.9);
  font-size: clamp(10px, 2vw, 24px);
  padding: 5px;
  word-break: break-word;
  margin-bottom: 0;
  font-weight: 700;
}

.game-board-item.selected p {
  display: block;
}

.plus {
  color: #fff;
  text-align: center;
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 700;
  line-height: 60px; /* 107.143% */
}

#hidden-message {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  max-height: 600px;
  max-width: 1320px;
  margin-left: auto;
  margin-right: auto;
}

#hidden-message .row {
  width: 100%;
  display: grid;
}

#hidden-message .col {
  gap: 1rem;
  padding: 0;
  display: grid;
  grid-template-columns:
    minmax(120px, 1fr) clamp(32px, 4vw, 56px)
    minmax(120px, 1fr) clamp(32px, 4vw, 56px)
    minmax(120px, 1fr);
  overflow-x: auto;
  align-items: center;
}

.hidden-item {
  width: 100%;
  max-width: 330px;
  min-width: 120px;
  height: auto;
  aspect-ratio: 330 / 220;
  object-fit: cover;
  object-position: top;
}

#hidden-message-reaveal-container {
  max-width: 700px;
}

.game-board.matches-found + #game-footer #hidden-message-reaveal-container {
  display: block;
}

@media screen and (max-width: 767px) {
  #hidden-message-reveal-group > div {
    flex-direction: column;
  }
}

#hidden-message-answer {
  color: #fff;
  font-size: 22px;
  font-weight: 700;
  line-height: 24px; /* 109.091% */
  background: var(--dark-gray);
  border: none;
  padding: 1.5rem;
}

#hidden-message-answer::placeholder {
  color: #fff;
  font-size: 22px;
  font-weight: 700;
  line-height: 24px; /* 109.091% */
}

.game-board-item.selected {
  pointer-events: none;
}

/* Game Play Screen - Incorrect Guess */
@keyframes shake {
  0% {
    transform: translateX(0);
  }
  25% {
    transform: translateX(-10px);
  }
  50% {
    transform: translateX(10px);
  }
  75% {
    transform: translateX(-10px);
  }
  100% {
    transform: translateX(0);
  }
}

.shake {
  animation: shake 0.5s ease;
}

/* Game Play Screen - Chances Remaining */
.circle {
  width: 22px;
  height: 22px;
  background-color: var(--canon-red);
  border-radius: 50%;
  display: inline-block;
}

.circle.guessed {
  background-color: var(--dark-gray);
}

#chances-remaining {
  display: flex;
  gap: 0.5rem;
}

/* Results Screen - Results Grid */
#results-screen {
  flex: 1;
}

#results-content {
  flex: 1;
}

#techniques-screen {
  max-width: 1250px;
  margin-left: auto;
  margin-right: auto;
  flex: 1;
}

#techniques-screen .header {
  margin-bottom: 40px;
}

#techniques-screen h2 {
  color: #fff;
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 700;
}

.techniques-grid-page {
  /* grid-template-columns: repeat(auto-fill, 274px); */
  grid-template-columns: repeat(2, 1fr);
  justify-content: center;
  gap: 100px;

  @media (max-width: 1050px) {
    grid-template-columns: repeat(1, 1fr);
  }
}

.techniques-grid-page .card {
  background: none;
  color: #fff;
  flex-direction: row;
  gap: 1rem;
}

.techniques-grid-page .card img {
  background: none;
  border-radius: 0;
  margin-bottom: 10px;
  height: 150px;
}

.techniques-grid-page .card h3 {
  color: var(--canon-red);
  font-size: clamp(24px, 4vw, 36px);
}

.techniques-grid-page .card h4 {
  font-size: clamp(16px, 2.5vw, 20px);
}

#hidden-answer-submit-btn:disabled {
  background-color: transparent;
  border-color: #fff;
}

.hg-button span {
  color: var(--dark-gray);
}

.altivity-logo {
  height: 24px !important;
}