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

/* Page */
body {
  font-family: Arial, Helvetica, sans-serif;
  background: #f2f4f8;
  color: #222;
}

/* Layout */
.container {
  max-width: 600px;
  margin: 60px auto;
  padding: 0 16px;
}

.card {
  background: white;
  padding: 24px;
  border-radius: 12px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
}

/* Headings */
h1 {
  font-size: 28px;
  margin-bottom: 4px;
}

.subtitle {
  color: #666;
  margin-bottom: 20px;
}

/* Form */
form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 16px;
}

.field {
  display: flex;
  flex-direction: column;
}

label {
  font-size: 12px;
  margin-bottom: 4px;
  color: #555;
}

input {
  padding: 10px;
  font-size: 14px;
  border-radius: 8px;
  border: 1px solid #ccc;
}

input:focus {
  outline: none;
  border-color: #4f46e5;
}

/* Button */
.add-btn {
  grid-column: span 2;
  padding: 12px;
  background: #4f46e5;
  color: white;
  border: none;
  border-radius: 8px;
  font-weight: bold;
  cursor: pointer;
}

.add-btn:hover {
  background: #4338ca;
}

/* Total */
#total {
  margin-top: 16px;
  padding: 12px;
  background: #f9fafb;
  border-radius: 8px;
  border: 1px dashed #ddd;
}

/* Expense list */
#expense-list {
  list-style: none;
  margin-top: 16px;
}

#expense-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px;
  margin-bottom: 8px;
  border: 1px solid #eee;
  border-radius: 8px;
}

/* Delete button */
#expense-list button {
  background: #fee2e2;
  color: #991b1b;
  border: 1px solid #fecaca;
  border-radius: 6px;
  padding: 6px 10px;
  cursor: pointer;
}

#expense-list button:hover {
  background: #fecaca;
}

/* Mobile */
@media (max-width: 500px) {
  form {
    grid-template-columns: 1fr;
  }

  .add-btn {
    grid-column: span 1;
  }
}