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

body {
  font-family: Arial, sans-serif;
  text-align: center;
  padding: 40px 20px 100px;
  background-color: #e0f7fa;
  position: relative;
  overflow-x: hidden;
}

/* Wave Layers */
.waves {
  position: fixed;
  top: 0;
  left: 0;
  width: 200%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
}

.wave {
  position: absolute;
  width: 200%;
  height: 100%;
  background-repeat: repeat-x;
  background-size: contain;
  opacity: 0.7;
}

.wave1 {
  background-image: url('data:image/svg+xml;utf8,<svg width="100%" height="200" xmlns="http://www.w3.org/2000/svg"><path fill="%23b3e5fc" d="M0 67 C 273,183 822,-40 1920,106 V 359 H 0 Z"></path></svg>');
  animation: wave1 20s linear infinite;
  top: 0;
}

.wave2 {
  background-image: url('data:image/svg+xml;utf8,<svg width="100%" height="200" xmlns="http://www.w3.org/2000/svg"><path fill="%23b2dfdb" d="M0 87 C 473,163 1022,-20 1920,126 V 359 H 0 Z"></path></svg>');
  animation: wave2 30s linear infinite;
  top: 20px;
}

.wave3 {
  background-image: url('data:image/svg+xml;utf8,<svg width="100%" height="200" xmlns="http://www.w3.org/2000/svg"><path fill="%23ffe0b2" d="M0 77 C 373,203 1022,-10 1920,116 V 359 H 0 Z"></path></svg>');
  animation: wave3 40s linear infinite;
  top: 40px;
}

@keyframes wave1 {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

@keyframes wave2 {
  0% { transform: translateX(0); }
  100% { transform: translateX(-25%); }
}

@keyframes wave3 {
  0% { transform: translateX(0); }
  100% { transform: translateX(-12.5%); }
}

.logo {
  max-width: 250px;
  margin-bottom: 20px;
}

h1 {
  margin-bottom: 30px;
  font-family: 'Cubao Free', sans-serif;
  font-size: 40px;
  background: linear-gradient(to right, #007BFF, #FFD700);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}

.links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 20px;
}

.link-card {
  width: 200px;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  transition: transform 0.2s ease;
}

.link-card:hover {
  transform: scale(1.05);
}

.first-year { background-color: #ccffcc; }
.second-year { background-color: #fffacd; }
.third-year { background-color: #d0f0fd; }
.fourth-year { background-color: #ffd6d6; }

.link-card img {
  width: 100%;
  height: 120px;
  object-fit: cover;
}

.link-card a {
  display: block;
  padding: 12px;
  text-decoration: none;
  color: #007BFF;
  font-family: 'Poppins', sans-serif;
  font-weight: 700;
}

.credits {
  margin-top: 40px;
  font-family: 'Poppins', sans-serif;
  font-weight: 700;
  color: #333;
}

.credits img {
  display: block;
  margin: 10px auto 0;
  max-width: 120px;
}