* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background-color: #111827;
  color: white;
  font-family: Arial, sans-serif;
}

form {
  width: min(520px, calc(100% - 32px));
  margin: 40px auto 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

input {
  width: 100%;
  background-color: #1f2937;
  border: 1px solid #334155;
  border-radius: 10px;
  padding: 14px 16px;
  color: white;
  font-size: 15px;
  outline: none;
}

input::placeholder {
  color: #94a3b8;
}

input:focus {
  border-color: #38bdf8;
}

.btn {
  background-color: #38bdf8;
  color: #082f49;
  border: none;
  border-radius: 10px;
  padding: 12px 16px;
  cursor: pointer;
  font-size: 16px;
  font-weight: bold;
}

.btn:hover {
  background-color: #0ea5e9;
}

section {
  width: min(720px, calc(100% - 32px));
  margin: 0 auto;
}

.title {
  font-size: 32px;
  color: #57ffbf;
  text-align: center;
  margin: 24px 0 16px;
}

#expenses-list {
  display: grid;
  gap: 14px;
}

.expense-card {
  background-color: #1f2937;
  border: 1px solid #334155;
  border-radius: 12px;
  padding: 18px;
  color: white;
}

.expense-card h3 {
  margin: 0 0 12px;
  font-size: 24px;
  color: #38bdf8;
  text-align: center;
}

.expense-card p {
  margin: 6px 0;
  font-size: 16px;
  color: #e5e7eb;
  text-align: center;
}

.delete-btn {
  width: 100%;
  background-color: #f87171;
  color: white;
  border: none;
  border-radius: 10px;
  padding: 10px 16px;
  cursor: pointer;
  font-size: 15px;
  font-weight: bold;
  margin-top: 12px;
}

.delete-btn:hover {
  background-color: #ef4444;
}

.price,
#total {
  font-size: 36px;
  color: white;
  text-align: center;
  background-color: #1f2937;
  border: 1px solid #334155;
  border-radius: 12px;
  padding: 16px;
  margin: 0 auto 32px;
}

#error-message {
  color: #fecaca;
  background-color: #7f1d1d;
  border: 1px solid #ef4444;
  border-radius: 10px;
  padding: 10px;
  text-align: center;
  font-size: 15px;
  display: none;
}

@media (max-width: 480px) {
  form {
    margin-top: 24px;
  }

  .title {
    font-size: 26px;
  }

  .expense-card h3 {
    font-size: 22px;
  }

  #total {
    font-size: 30px;
  }
}

#e.clear-btn {
  width: 100%;
  background-color: transparent;
  color: #f87171;
  border: 1px solid #f87171;
  border-radius: 10px;
  padding: 10px 16px;
  cursor: pointer;
  font-size: 15px;
  font-weight: bold;
  margin: 0 auto 32px;
}

.clear-btn:hover {
  background-color: #7f1d1d;
}
#empty-message {
  text-align: center;
  color: #94a3b8;
  background-color: #1f2937;
  border: 1px dashed #334155;
  border-radius: 12px;
  padding: 18px;
  font-size: 16px;
  margin: 0 auto 16px;
}