style.css

/* Add your CSS here */
/* Reset basic default spacing */
body {
  margin: 0;
  font-family: 'Courier', Courier, monospace;
  background-color: #f4f4f4;
  color: #333;
}

/* Style the header / hero section */
header {
  background-color: #003c71; /* Intel Blue */
  color: white;
  padding: 40px 20px;
  text-align: center;
}

header img {
  width: 300px;
  margin-bottom: 20px;
}

header h1 {
  font-size: 2em;
  margin: 0;
}

header p {
  font-size: 1.2em;
  max-width: 600px;
  margin: 10px auto 0;
}

/* Center the instructions text under the header */
.instructions {
  text-align: center;
  font-size: 1em;
  margin: 20px 0 0 0;
}

/* Make the timeline section scroll horizontally */
section {
  display: flex;
  overflow-x: auto;        /* enables horizontal scroll */
  padding: 20px;
  gap: 20px;
  scroll-behavior: smooth;
  /* Show only 3 cards at a time */
  max-width: 980px;        /* 3 cards * 300px + 2*20px gap = 960px */
  margin: 0 auto;          /* center the timeline */
  /* Enable scroll snap for timeline cards */
  scroll-snap-type: x mandatory;
}

/* Timeline card styles */
section div {
  background-color: white;
  flex: 0 0 300px;         /* fixed width for each card */
  border-radius: 10px;
  padding: 15px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
  transition: transform 0.3s ease;
  position: relative;
  overflow: hidden;
  /* Snap each card to the scroll position */
  scroll-snap-align: start;
}

/* On hover: slightly zoom card */
section div:hover {
  transform: scale(1.05);
}

/* Style for headings inside the cards */
section h2 {
  margin-top: 0;
  font-size: 1.5em;
  color: #003c71;
}

section h3 {
  margin: 5px 0;
  font-size: 1.2em;
}

/* Card images */
section img {
  width: 100%;
  height: 180px;
  border-radius: 5px;
  object-fit: cover;
  margin: 10px 0;
}

/* Paragraphs inside cards - hidden by default */
section p {
  font-size: 0.95em;
  line-height: 1.4;
  transition: max-height 0.3s ease, opacity 0.3s ease;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  /* Add absolute positioning for reveal effect */
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: #003c71;
  color: #fff;
  padding: 20px;
  box-sizing: border-box;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  pointer-events: none; /* Prevent accidental selection when hidden */
}

/* Hide image and titles on card hover */
section div:hover img,
section div:hover h2,
section div:hover h3 {
  opacity: 0;
  transition: opacity 0.3s ease;
}

/* Show paragraph text on hover, covering the full card */
section div:hover p {
  max-height: 1000px;
  opacity: 1;
  pointer-events: auto;
}

/* Timeline arrow indicators */
.timeline-arrows {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 980px;
  margin: 10px auto 0 auto;
  padding: 0 30px;
}

.arrow {
  font-size: 2em;
  color: #003c71;
  user-select: none;
  pointer-events: none; /* purely visual */
}

/* Hide arrows on small screens (vertical timeline) */
@media (max-width: 600px) {
  .timeline-arrows {
    display: none;
  }
  section {
    flex-direction: column;      /* Stack cards vertically */
    overflow-x: unset;           /* Remove horizontal scroll */
    overflow-y: auto;            /* Enable vertical scroll if needed */
    max-height: 80vh;            /* Limit height so user can scroll */
    gap: 20px;
    max-width: 100%;             /* Remove width limit on small screens */
    /* Remove scroll snap on vertical layout */
    scroll-snap-type: none;
  }
  section div {
    width: 100%;                 /* Cards take full width */
    max-width: 100%;
    /* Remove scroll snap on vertical layout */
    scroll-snap-align: unset;
  }

  /* Reduce header image and text size*/
  header img {
    width: 180px;
    margin-bottom: 12px;
  }
  header h1 {
    font-size: 1.2em;
  }
  header p {
    font-size: 1em;
    max-width: 95vw;
  }

  /* Make instructions smaller on small screens */
  .instructions {
    font-size: 0.7em;
  }
}