:root {
  --primary-green: #2ecc71;
  --emerald: #27ae60;
  --light-green: #eafaf1;
  --text-dark: #2c3e50;
}

body {
  background-color: var(--light-green);
  color: var(--text-dark);
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.installment-calculator {
  max-width: 650px;
  margin: 40px auto;
  background: #fff;
  border-radius: 20px;
  box-shadow: 0 8px 20px rgba(0,0,0,0.1);
  overflow: hidden;
}

.installment-calculator__tabs .nav-link {
  border: none;
  border-radius: 0;
  color: var(--emerald);
  font-weight: 600;
}

.installment-calculator__tabs .nav-link.active {
  background-color: var(--primary-green);
  color: #fff !important;
}

.installment-calculator__bg {
  padding: 2rem;
  background: rgba(255, 255, 255, 0.8);
}

.installment-calculator__content {
  background: url('logo2.png') center/contain no-repeat;
}

.installment-calculator__header {
  text-align: center;
  margin-bottom: 1.5rem;
}

.installment-calculator__title {
  color: var(--emerald);
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.installment-calculator__description {
  font-size: 0.95rem;
  color: #7f8c8d;
  margin: 0;
}

.installment-calculator__label {
  font-weight: 500;
}

.installment-calculator__input:disabled {
  background-color: #f1f3f5;
  opacity: 1;
  user-select: none;
  pointer-events: none;
  color: transparent;
  caret-color: transparent;
}

.installment-calculator__results {
  background: var(--light-green);
  padding: 1.5rem;
  border-radius: 12px;
  margin-top: 1.5rem;
}

.installment-calculator__results .installment-calculator__label {
  color: var(--emerald);
  font-weight: 600;
}

.installment-calculator__note {
  font-size: 0.85rem;
  color: #7f8c8d;
  margin-top: 0.3rem;
}

.installment-calculator__money {
  position: relative;
  z-index: 2;
  background: transparent;
  color: transparent;
}

.installment-calculator__displays {
  z-index: 1;
  position: absolute;
  top: 6px;
  left: 12px;
}

.installment-calculator__money:disabled {
  z-index: 0;
}