* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  background-color: #d9c4a0;
}

p {
  font-family: 'KalamRegular';
}

h1, h2 {
  font-family: 'OldLondon';
}

h1, h2, h3, h4, p, header, nav, footer {
  text-align: center;
}


@font-face {
	font-family: 'KalamRegular';
	src: local('KalamRegular'), url('./fonts/KalamRegular.woff') format('woff');
}

@font-face {
  font-family: 'ChelseaMarketRegular';
  src: local('ChelseaMarketRegular'), url('./fonts/ChelseaMarketRegular.woff') format('woff');
}

@font-face {
  font-family: 'OldLondon';
  src: local('OldLondon'), url('./fonts/OldLondon.woff') format('woff');
}

.highlight {
  color: red;
}

#introScreen {
  position: fixed; /* Makes sure the overlay covers the entire screen */
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  overflow: hidden;
  text-align: center;
  z-index: 100; /* Makes sure that the intro is the front-most thing */
  background-color: grey; /* Covers up the actual website behind it */
}

#introTrain {
  width: 300px;
  transition: transform 2s ease-in-out;
}

#introTitle {
  font-size: 3rem;
  font-weight: bold;
  margin-top: 1rem;
  font-family: 'OldLondon';
}

#introSubtext {
  font-size: 2rem;
  margin-top: 0.5rem;
  font-family: 'ChelseaMarketRegular'
}

#introTitle, #introSubtext, #introTrain {
  z-index: 2;
}

#introTitle, #introSubtext {
  transition: opacity 0.5s ease-in-out;
  color: #f1e8c7
}

/* Vignette Effect */
.overlay {
  content: ""; /* Since there isn't any actual content, an empty string is inserted so the element can still exist */
  position: absolute;
  inset: 0; /* Covers the entirety of the parent */
  background: radial-gradient(ellipse at center, rgba(0,0,0,0) 20%, rgba(0,0,0) 100%);
  pointer-events: none; /* Prevents any accidental clicking on the website behind it */
  z-index: 1;
}

/* Hide intro screen after animation */
#introScreen.fadeOut {
  animation: fadeOut 1.5s forwards;
}

@keyframes fadeOut {
  to {
    opacity: 0;
    visibility: hidden;
  }
}

header {
  position: relative;
  height: 100vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: center;
  z-index: 1;
}

header::before { /* The cyclig train background */
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background-size: cover;
  background-position: center;
  animation: backgroundFade 15s infinite; /* Infinite animation */
  opacity: 0.7; 
}

/* Fade between multiple background images */
@keyframes backgroundFade {
  0% { background-image: url('./images/trainimage1.jpg'); opacity: 1; }
  33.33% { background-image: url('./images/trainimage2.jpg'); opacity: 1; }
  66.66% { background-image: url('./images/trainimage3.jpg'); opacity: 1 }
  100% { background-image: url('./images/trainimage1.jpg'); opacity: 1; }
}


header h1 {
  font-size: 8rem;
  margin: 0;
  color: #cd8d1b;
  text-shadow: 2px 2px 4px rgba(0,0,0,0.6);
  z-index: 1;
}

header h2 {
  font-size: 4rem;
  font-family: 'KalamRegular';
  margin-top: 0.5rem;
  font-style: italic;
  color: #f1e8c7;
  text-shadow: 1px 1px 3px rgba(0,0,0,0.4);
  z-index: 1;
}

nav ul {
  display: flex;
  justify-content: center;
  gap: 1rem;
  list-style: none; /* Removes the bullet points */
  margin: 1rem 0;
  flex-wrap: wrap;
}

nav ul li {
  flex-shrink: 0; /* Prevents the items from shrinking */
}

nav ul li button, .fullscreen-controls button {
  padding: 1rem 2rem;
  border: 3px solid #444;
  border-radius: 12px;
  background: linear-gradient(145deg, #c2b280, #a38c59); /* Diagonal gold gradient */
  box-shadow: 
    inset 0 0 5px #fff3,
    0 6px 0 #3e3e3e, 
    0 6px 6px rgba(0, 0, 0, 0.6);
  font-size: 0.9rem;
  font-weight: bold;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  max-width: 350px;
}

#hamIcon {
  display: none;
  background-color: #3a3a3a;
  color: #f1f1f1;
  border: 2px solid #888888;
  border-radius: 8px;
  padding: 0.6rem 1.2rem;
  font-weight: bold;
  font-size: 1rem;
  cursor: pointer;
  margin: 0 auto 1rem auto;
  text-align: center;
}

.fullscreen-controls {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: 0.5rem;
  margin-bottom: 1rem;
}

.fullscreen-controls button {
  padding: 0.5rem 1rem;
  font-size: 1rem;
  cursor: pointer;
}

#hamIcon:hover {
  background-color: #555555;
}

#page0btn {
  cursor: pointer;
  transition: color 0.3s ease;
}

.page {
  background-image: url('./images/background.jpg');
  background-repeat: repeat-y; /* Repeats the background along the y-axis to prevent it from being stretched */
  background-size: contain;
  background-position: center;
  color: #2e2e2e;
  line-height: 1.6;
  padding: 2rem 1.5rem;
  min-height: 100vh;
}

.page h2 {
  font-size: 6rem;
  font-weight: bold;
  color: #9a7b3b;
  margin-bottom: 2rem;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 1);
  z-index: 1000;
}

#page0 {
  color: #2c1b10; 
  display: flex;
  flex-direction: column;
  align-items: center;
}

#page0 div {
  background: #f1e8c7e6; 
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

#page0 div img {
  max-width: 100%;
  height: auto;
  margin-bottom: 1.5rem;
  border: 4px solid #a17c47;
  border-radius: 8px;
}

#page0 div p {
  font-size: 1.25rem;
  line-height: 1.7;
  margin: 0 auto;
  color: #2b1d0e;
  max-width: 800px;
}

.timeline-container {
  position: relative; /* Allows position: absolute child elements to be positioned relative to the container */
}

.timeline ul {
  padding: 50px 0;
}

.timeline ul li {
  list-style: none;
  position: relative;
  width: 6px; /* The line in the center, the spine of the timeline */
  margin: 0 auto;
  padding-top: 50px;
  background-color: #345c60;
}

.timeline h3 {
  font-weight: 700;
  font-size: 1.5rem;
}

.timeline h4 {
  font-weight: 300;
  font-size: 1rem;
}

.timeline time, .timeline h3 {
  font-family: 'ChelseaMarketRegular';
}

.timeline ul li::after { /* The center dot marking an event */
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%); /* Centered horizontally */
  width: 30px;
  height: 30px;
  border-radius: 50%; /* Makes it a circle */
  transition: all 0.5s;
  background-color: inherit; /* Inherits it from the parent: li */
  z-index: 1;
}

.timeline ul li div {
  position: relative;
  bottom: 0;
  width: 400px;
  padding: 15px;
  background-color: #f1e8c7e6;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
  transition: transform 0.6s ease-out, opacity 0.6s ease-out;
}

.timeline ul li div p {
  overflow-x: hidden;
  text-align: left;
}

.timeline ul li:nth-child(odd) div {
  left: 45px;
  transform: translateX(400px); /* Positions it 400px off to the right */
  opacity: 0;
}

.timeline ul li:nth-child(even) div {
  left: calc(-400px - 45px + 6px); 
  /* -400px (box width) - 45px (gap from center) + 6px (half of timeline width for alignment) */
  transform: translateX(-400px); /* Positions it 400px off to the left */
  opacity: 0;
}

.timeline ul li div.show {
  transform: translateX(0); /* Reveal animation */
  opacity: 1;
}

.carousel-container {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 40px auto;
  gap: 40px;
}

.carousel-arrow {
  font-size: 3rem;
  cursor: pointer;
  user-select: none; /* Prevents selection when double-clicking */
  color: black;
  padding: 10px;
  transition: transform 0.2s;
}

.carousel-arrow:hover {
  transform: scale(1.2);
}

#mainTrainSprite {
  width: 400px; /* Size of each sprite to be displayed */
  height: 200px;
  background-image: url("images/iconicTrainSprites.png");
  background-repeat: no-repeat;
  background-position: 0 0;
  transition: background-position 0.5s ease;
  margin: 0 auto;
}

.carousel-main {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 200px;
}

.train-info {
  max-width: 700px;
  margin: 10px auto;
  padding: 2rem 1.5rem;
  text-align: center;
  font-size: 1.2rem;
  border: 4px solid #a17c47;
  background: #f1e8c7e6; 
}


#game{
  width: 300px; /* Area of the game space */
  height: 500px;
  border: 1px solid black;
  margin: auto;
  background-image: url('./images/gameBackground.png');
}

#character {
  width: 100px;
  height: 100px;
  background-image: url('./images/gameCharacter.png');
  background-size: contain;
  position: relative;
  top: 300px;
  left: 100px;
}

#obstacle{
  width: 100px;
  height: 100px;
  background-image: url('./images/gameObstacle.png');
  background-size: contain;
  animation: slide 1s linear infinite;
  position: relative;
}

@keyframes slide {
  0% {
    top: -100px; /* Starts above the playing area */
  }
  100% {
    top: 500px; /* Stops once it hits the bottom of the playing area */
  }
}

#buttons {
  text-align: center;
  margin-top: 20px;
}

#buttons button {
  padding: 10px 20px;
  font-size: 18px;
  margin: 5px;
  cursor: pointer;
}


footer {
  padding: 0.5rem;
  border-top: 2px solid #888;
}

footer h2 {
  font-family: 'ChelseaMarketRegular';
  font-size: 2rem;
}

footer p {
  font-size: 1rem;
  font-style: italic;
}

.qrCode-container {
  text-align: center;
  margin-top: 2rem;
}

.qrCode {
  width: 150px;
  height: auto;
  transition: opacity 0.3s ease;
}

.qrCaption {
  font-size: 0.9rem;
  color: #444;
}

@media screen and (max-width: 800px){

  header {
    height: 75vh;
  }

  header::before {
    background-size: contain; /* prevents stretching */
    background-position: center top;
    background-repeat: no-repeat;
  }

  header h1,
  header h2 {
    font-size: 3rem;
    z-index: 1;
  }

  header h2 {
    font-size: 2rem;
  }

  .page h2 {
    font-size: 3rem;
  }

  nav ul {
    display: none;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
  }

  nav ul.menuShow {
    display: flex;
  }

  nav ul li {
    display: block;
    text-align: center;
  }

  #hamIcon {
    display: block;
  }

  .timeline ul li{
    margin-left: 10px;
  }

  .timeline ul li div {
    width: calc(100vw - 90px);
  }
  
  .timeline ul li:nth-child(even) div {
    left: 45px;
  }

  .qrCode-container{ /* Removes the QR segment if the screen is on mobile view */
  display: none;
  }

  .carousel-container {
    flex-direction: column;
    align-items: center;
  }

  .carousel-arrow {
    position: static;
    font-size: 2rem;
    margin: 1rem;
  }

  .carousel-main img {
    max-width: 90%;
    height: auto;
  }
}