body {
  font-family: "Segoe UI", sans-serif;
  margin: 0;
  background: #f0f0f0;
  color: #333;
}

header {
  background: linear-gradient(135deg, #465980, #3f506f);
  color: #fff;
  padding: 1rem 2rem;
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

h1 {
  margin: 0;
  font-weight: 400;
}

#binSection {
  margin: 1rem 2rem;
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

#binSection input {
  flex: 1;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  border: 1px solid #ccd;
}

#binSection button {
  background: #465980;
  color: #fff;
  border: none;
  border-radius: 4px;
  padding: 0.6rem 1rem;
  font-size: 0.95rem;
  cursor: pointer;
}
#binSection button:hover {
  background: #3b4c75;
}

#resultSection.hidden {
  display: none;
}
#resultSection {
  margin: 1rem 2rem;
  background: #fff;
  border-radius: 6px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
  padding: 1rem 2rem 2rem;
}

#infoMessage {
  margin-top: 1rem;
  padding: 0.6rem;
  background: #eef2f7;
  border-left: 4px solid #ccd;
  color: #444;
}

#visualContainer {
  margin-top: 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

#downloadBtn.hidden {
  display: none;
}
#downloadBtn {
  background: #6b9cde;
  color: #fff;
  border: none;
  border-radius: 4px;
  padding: 0.6rem 1.2rem;
  cursor: pointer;
  font-size: 0.95rem;
  margin-top: 1rem;
}
#downloadBtn:hover {
  background: #5a8ccc;
}

/* boîtes d'affichage d'un gradient */
.gradient-box {
  width: 320px;
  height: 130px;
  border-radius: 6px;
  border: 1px solid #ccc;
  position: relative;
  background: #fafafa;
  overflow: hidden;
  box-shadow: 0 2px 4px rgba(0,0,0,0.08);

  opacity: 0;
  transform: translateY(15px);
  animation: fadeInUp 0.6s ease forwards;
}

.gradient-title {
  position: absolute;
  bottom: 0;
  width: 100%;
  background: rgba(255,255,255,0.7);
  padding: 0.3rem;
  text-align: center;
  font-weight: 500;
  font-size: 0.9rem;
  color: #222;
}

.gradient-box:hover {
  box-shadow: 0 4px 10px rgba(0,0,0,0.15);
  transform: scale(1.02);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

/* On peut styliser le footer et son bouton un peu comme on veut */
footer {
  margin-top: 2rem;
  padding: 1rem 2rem;
  background: #f3f3f3;
  text-align: center;
}

footer button {
  background: #666;
  color: #fff;
  border: none;
  border-radius: 4px;
  padding: 0.6rem 1.2rem;
  cursor: pointer;
  font-size: 0.9rem;
}
footer button:hover {
  background: #555;
}

@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}