* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: Arial, sans-serif;
}

body {
  background: linear-gradient(
    135deg,
    #264653,
    #2a9d8f
  ); /* Verde și albastru închis */
  color: #e9ecef;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.header {
  text-align: center;
  padding: 2rem;
  background-color: #1b4332; /* Verde foarte închis */
  color: #e9ecef;
}

.title {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.subtitle {
  font-size: 1.2rem;
  color: #a8dadc; /* Verde deschis */
}

.main-content {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-grow: 1;
  padding: 2rem;
}

.cash-register-container {
  background-color: rgba(233, 236, 239, 0.95); /* Alb-gri foarte deschis */
  padding: 2rem;
  border-radius: 10px;
  max-width: 400px;
  width: 100%;
  box-shadow: 0px 4px 12px rgba(0, 0, 0, 0.4);
}

.input-group {
  margin-bottom: 1.5rem;
}

.input-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: bold;
  color: #1d3557; /* Albastru închis */
}

.input-field {
  width: 100%;
  padding: 0.7rem;
  font-size: 1rem;
  border: 1px solid #2a9d8f; /* Verde accentuat */
  border-radius: 5px;
  background-color: #a8dadc; /* Verde deschis */
  color: #1d3557;
}

.input-field::placeholder {
  color: #457b9d; /* Verde-albastru deschis */
}

.btn {
  width: 100%;
  padding: 0.7rem;
  font-size: 1rem;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  transition: background 0.3s;
}

.primary-btn {
  background-color: #2a9d8f;
  color: #f1faee; /* Alb aproape pur */
}

.primary-btn:hover {
  background-color: #1b4332;
}

.change-due {
  margin-top: 1.5rem;
  font-size: 1.2rem;
  font-weight: bold;
  color: #1b4332; /* Verde foarte închis */
  text-align: center;
}

.footer {
  background-color: #1d3557; /* Albastru închis */
  color: #e9ecef;
  text-align: center;
  padding: 1rem;
  margin-top: auto;
}