@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@500&display=swap');

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background: linear-gradient(180deg, #2D4DA8, #8DA9FF);
  color: #F0F4FF;
  font-family: 'Orbitron', sans-serif;
  line-height: 1.6;
  scroll-behavior: smooth;
  overflow-x: hidden;
}

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 20px;
  text-align: center;
}

/* Yellow gradient for all h1 headings on main pages */
h1 {
  font-size: 2em;
  margin-bottom: 10px;
  background: linear-gradient(90deg, #fff9c4, #fff176);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  color: transparent;
}

p {
  margin-bottom: 20px;
  color: #F0F4FF;
}

.model-container {
  margin: 20px auto;
  max-width: 500px;
}

.model-buttons {
  margin: 10px 0;
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

.model-buttons button {
  background: linear-gradient(145deg, #3d8fd1, #2a6da2);
  color: #fff;
  border: none;
  padding: 10px 14px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 1rem;
  font-weight: bold;
  font-family: 'Orbitron', sans-serif;
  transition: background 0.3s ease;
}

.model-buttons button:hover {
  background: linear-gradient(145deg, #2a6da2, #3d8fd1);
}

.photo-strip {
  display: flex;
  overflow-x: auto;
  gap: 10px;
  padding: 10px 0;
  scroll-behavior: smooth;
}

.photo-slide {
  flex: 0 0 auto;
  width: 140px;
  height: 100px;
  border: 3px solid #2D4DA8;
  border-radius: 8px;
  background: #000;
  position: relative;
  cursor: pointer;
}

.photo-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 5px;
}

/* Scroll progress bar */
#scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 5px;
  background: linear-gradient(90deg, #b14e74, #A82D4D);
  width: 0%;
  z-index: 9999;
}

/* Back to top button */
#back-to-top {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: linear-gradient(145deg, #b14e74, #A82D4D);
  border: none;
  border-radius: 50%;
  color: white;
  font-size: 1.5rem;
  width: 45px;
  height: 45px;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  font-family: 'Orbitron', sans-serif;
}

/* Side arrow on first page */
.side-arrow {
  position: fixed;
  top: 20px;
  right: 20px;
  font-size: 2rem;
  color: #fff;
  cursor: pointer;
  user-select: none;
  font-weight: bold;
  transition: color 0.3s ease;
  z-index: 1200;
}

.side-arrow:hover {
  color: #8DA9FF;
}

/* Down arrow linking sections */
.down-arrow {
  font-size: 3rem;
  color: #fff;
  cursor: pointer;
  margin-top: 10px;
  display: inline-block;
  transition: color 0.3s ease;
}

.down-arrow:hover {
  color: #8DA9FF;
}

/* Side page with yellow background and blue gradient h1 */
.side-page {
  position: fixed;
  top: 0;
  right: -100%;
  width: 100vw;
  height: 100vh;
  background: linear-gradient(180deg, #fff9c4, #fff176); /* yellow background */
  padding: 40px;
  box-sizing: border-box;
  overflow-y: auto;
  font-family: 'Orbitron', sans-serif;
  z-index: 1100;
  color: #2D4DA8; /* dark blue text for normal text */
  transition: right 0.5s ease;
}

.side-page.active {
  right: 0;
}

/* Gradient text only on the side page heading */
.side-page h1 {
  font-size: 2.5em;
  margin-bottom: 20px;
  background: linear-gradient(90deg, #2D4DA8, #8DA9FF);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  color: transparent;
}

/* Paragraph text normal dark blue */
.side-page p {
  font-size: 1.2em;
  color: #2D4DA8;
}

/* Side page button */
.side-page button {
  margin-top: 30px;
  background: linear-gradient(145deg, #3d8fd1, #2a6da2);
  color: #fff;
  border: none;
  padding: 12px 18px;
  font-size: 1rem;
  font-weight: bold;
  border-radius: 10px;
  cursor: pointer;
  font-family: 'Orbitron', sans-serif;
  transition: background 0.3s ease;
}

.side-page button:hover {
  background: linear-gradient(145deg, #2a6da2, #3d8fd1);
}