* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: linear-gradient(135deg, #eff6ff, #fdf2f8);
  min-height: 100vh;
  display: grid;
  place-items: center;
  color: #1e293b;
}

.app {
  width: 90%;
  max-width: 480px;
  background-color: white;
  padding: 35px;
  border-radius: 18px;
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.12);
}

h1 {
  text-align: center;
  color: #2563eb;
  margin-bottom: 8px;
}

.subtitle {
  text-align: center;
  color: #64748b;
  margin-bottom: 25px;
}

form {
  display: flex;
  gap: 10px;
}

input {
  flex: 1;
  padding: 13px;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  font-size: 15px;
}

input:focus {
  outline: none;
  border-color: #2563eb;
}

button {
  background-color: #2563eb;
  color: white;
  border: none;
  padding: 13px 16px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 15px;
}

button:hover {
  background-color: #1d4ed8;
}

ul {
  list-style: none;
  padding: 0;
  margin-top: 25px;
}

li {
  background-color: #f8fafc;
  padding: 14px;
  margin-bottom: 10px;
  border-radius: 10px;
  border: 1px solid #e2e8f0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.edit-btn {
  background-color: #f59e0b;
  padding: 8px 12px;
  font-size: 13px;
  margin-right: 5px;
}

.edit-btn:hover {
  background-color: #d97706;
}

.delete-btn {
  background-color: #dc2626;
  padding: 8px 12px;
  font-size: 13px;
}

.delete-btn:hover {
  background-color: #b91c1c;
}

.clear-btn {
  width: 100%;
  margin-top: 18px;
  background-color: #475569;
}

.clear-btn:hover {
  background-color: #334155;
}

@media (max-width: 480px) {
  form {
    flex-direction: column;
  }

  button {
    width: 100%;
  }
}