@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600&display=swap');

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

body {
  font-family: 'Poppins', sans-serif;
  background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
  color: #ffffff;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 20px;
}

.container {
  width: 400px;
  max-width: 100%;
  padding: 20px;
  background-color: #1e1e1e;
  border-radius: 10px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

h1,
h2,
h3 {
  text-align: center;
  margin-bottom: 20px;
  font-weight: 600;
  color: #e0e0ff;
}

form {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  margin-bottom: 20px;
  gap: 10px;
}

input[type="text"],
input[type="number"] {
  width: 45%;
  padding: 10px;
  background-color: #333333;
  border: none;
  border-radius: 5px;
  color: #fff;
  outline: none;
  margin: 3px;
  transition: background-color 0.3s ease, transform 0.2s ease;
}

input[type="text"]:focus,
input[type="number"]:focus {
  background-color: #444;
  transform: scale(1.02);
}

form button[type="submit"] {
  margin: 10px auto 0;
  display: block;
  width: 180%;
  max-width: 100px;
}

button {
  padding: 10px;
  background-color: #008080;
  border: none;
  border-radius: 5px;
  color: #fff;
  cursor: pointer;
  transition: background-color 0.3s ease, transform 0.2s ease;
}

button:hover {
  background-color:  #006464;
  transform: scale(1.05);
}

#expense-list {
  list-style-type: none;
  padding: 0;
}

#expense-list li {
  background-color: #333333;
  padding: 10px;
  margin-bottom: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-radius: 5px;
  transition: background-color 0.3s ease, transform 0.2s ease;
}

#expense-list li:hover {
  background-color: #3f3f3f;
  transform: translateX(2px);
}

#expense-list button {
  background-color: #ef4444;
  padding: 6px 10px;
  border: none;
  border-radius: 5px;
  font-size: 0.85rem;
  transition: background-color 0.3s ease;
}

#expense-list button:hover {
  background-color: #dc2626;
}

#total {
  text-align: right;
  font-weight: 600;
  font-size: 1.2rem;
  color: #c4b5fd;
}

.hidden {
  display: none;
}

/* Responsive Design */
@media (max-width: 600px) {
  .container {
    width: 100%;
  }

  form {
    flex-direction: column;
  }

  input[type="text"],
  input[type="number"] {
    width: 100%;
  }

  form button[type="submit"] {
    width: 100%;
  }

  #expense-list li {
    flex-direction: column;
    align-items: flex-start;
  }

  #expense-list button {
    align-self: flex-end;
  }
}