body {
  margin: 0;
  font-family: 'Segoe UI', Arial, sans-serif;
  background: linear-gradient(to bottom, #b3e0ff 0%, #e6f7ff 100%);
  min-height: 100vh;
  color: #222;
}
#clouds-bg {
  position: fixed;
  top: 0; left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
}
.container {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1rem 3rem 1rem;
  background: transparent;
}
h1 {
  text-align: center;
  color: #3498db;
  margin-bottom: 0.2em;
  font-size: 2.5em;
  letter-spacing: 1px;
}
.subtitle {
  text-align: center;
  color: #1976d2;
  margin-bottom: 2em;
}
.projects {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  justify-content: center;
}
.project-card {
  background: rgba(255,255,255,0.38);
  border-radius: 1.2rem;
  box-shadow: 0 4px 24px #90caf933, 0 1.5px 0 #fff2;
  padding: 2rem 2.2rem 1.5rem 2.2rem;
  color: #222;
  backdrop-filter: blur(2px);
  margin-bottom: 2.5rem;
  transition: box-shadow 0.2s;
}
.project-card:hover {
  box-shadow: 0 8px 32px #90caf955, 0 2px 0 #fff3;
}
.project-card h2 {
  color: #2980b9;
  margin-top: 0;
  margin-bottom: 0.5em;
  font-size: 1.3em;
}
.project-card p {
  color: #34495e;
  margin-bottom: 1em;
}
.file-links {
  background: rgba(255,255,255,0.18);
  border-radius: 0.7rem;
  padding: 0.5rem 1rem;
  margin-bottom: 1rem;
  display: flex;
  gap: 1.2rem;
  flex-wrap: wrap;
}
.file-links a {
  background: #e3f1fb;
  color: #2980b9;
  padding: 0.4em 0.9em;
  border-radius: 0.7em;
  text-decoration: none;
  font-size: 0.98em;
  transition: background 0.2s, color 0.2s;
}
.file-links a:hover:not(.disabled) {
  background: #b3e0ff;
  color: #1a5276;
}
.file-links .disabled {
  pointer-events: none;
  opacity: 0.5;
  background: #d6eaf8;
  color: #8395a7;
}
.viz {
  width: 100%;
  min-height: 180px;
  margin-top: 0.5em;
  background: rgba(255,255,255,0.13);
  border-radius: 0.7em;
  padding: 0.7rem;
  margin-top: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
@media (max-width: 900px) {
  .projects {
    flex-direction: column;
    align-items: center;
  }
  .project-card {
    width: 95vw;
    min-width: 0;
  }
}