body {
  font-family: 'Comic Sans MS', 'Arial', sans-serif;
  margin: 0;
  padding: 20px;
  background: linear-gradient(-45deg, #0077be, #00c6c6, #87e0fd, #b2fefa);
  background-size: 400% 400%;
  animation: gradientMove 20s ease infinite;
  color: #003b6f;
}

@keyframes gradientMove {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.container {
  max-width: 800px;
  margin: auto;
  background: rgba(255, 255, 255, 0.95);
  padding: 20px;
  border-radius: 16px;
  box-shadow: 0 4px 20px rgba(0, 60, 120, 0.2);
}

h1 {
  text-align: center;
}

form {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

form input,
form select,
form button {
  flex: 1 1 120px;
  padding: 10px;
  font-size: 16px;
  border: 1px solid #aad;
  border-radius: 6px;
}

form button {
  background-color: #00aaff;
  color: white;
  border: none;
  transition: background-color 0.3s ease;
}

form button:hover {
  background-color: #0077cc;
}

ul {
  list-style: none;
  padding: 0;
}

li {
  margin-bottom: 10px;
  padding: 12px;
  border-radius: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  cursor: grab;
  transition: transform 0.2s;
  border-left: 6px solid transparent;
}

li[data-importance="🔴 大事なこと"] {
  border-left-color: #e74c3c;
  background-color: #ffe5e5;
}

li[data-importance="🟡 まあまあ大事"] {
  border-left-color: #f1c40f;
  background-color: #fff9dc;
}

li[data-importance="🟢 やること"] {
  border-left-color: #2ecc71;
  background-color: #e6fff4;
}

li.dragging {
  opacity: 0.5;
  transform: scale(1.02);
}

.completed {
  text-decoration: line-through;
  color: #555;
  background-color: #cde;
}

button {
  margin-left: 5px;
  padding: 6px 10px;
  font-size: 14px;
  border-radius: 6px;
  border: none;
  background-color: #3399cc;
  color: white;
  cursor: pointer;
}

button:hover {
  background-color: #227799;
}

#ocean-fact {
  margin-top: 20px;
  font-style: italic;
  text-align: center;
  color: #005577;
}