:root {
  /* Primary colors */
  --lime: hsl(61, 70%, 52%);
  --red: hsl(4, 69%, 50%);

  /* Neutral colors */
  --white: hsl(0, 0%, 100%);
  --slate-100: hsl(202, 86%, 94%);
  --slate-300: hsl(203, 41%, 72%);
  --slate-500: hsl(200, 26%, 54%);
  --slate-700: hsl(200, 24%, 40%);
  --slate-900: hsl(202, 55%, 16%);
}

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

body {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 500;
  font-size: 16px;
  background-color: var(--slate-100);
  color: var(--slate-900);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem 1rem;
}

.calculator-container {
  background-color: var(--white);
  border-radius: 1rem;
  padding: 1.5rem;
  width: 100%;
  max-width: 1000px;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
  margin-bottom: 2rem;
}

.calculator-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.header-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.calculator-icon {
  width: 24px;
  height: 24px;
}

h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--slate-900);
}

.clear-btn {
  background: none;
  border: none;
  color: var(--slate-500);
  font-family: inherit;
  font-weight: 500;
  cursor: pointer;
  transition: color 0.3s;
}

.clear-btn:hover, .clear-btn:focus {
  color: var(--slate-700);
  text-decoration: underline;
}

.calculator-content {
  display: flex;
  flex-direction: column;
}

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

label, p {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--slate-700);
  font-weight: 500;
}

.input-wrapper {
  position: relative;
}

input[type="number"] {
  width: 100%;
  padding: 0.75rem;
  padding-left: 2rem;
  border: 1px solid var(--slate-300);
  border-radius: 0.5rem;
  font-family: inherit;
  font-size: 1rem;
  color: var(--slate-900);
  transition: border-color 0.3s;
}

input[type="number"]:focus {
  outline: none;
  border-color: var(--slate-500);
}

.currency-symbol, .unit-label {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  color: var(--slate-700);
  font-weight: 500;
}

.currency-symbol {
  left: 0.75rem;
}

.unit-label {
  right: 0.75rem;
}

/* Adjust padding for inputs with unit labels */
input#mortgage-term, input#interest-rate {
  padding-right: 3.5rem;
}

.radio-group {
  display: flex;
  gap: 1rem;
}

.radio-option {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

input[type="radio"] {
  accent-color: var(--lime);
  width: 1.25rem;
  height: 1.25rem;
}

.calculate-btn {
  width: 100%;
  padding: 1rem;
  background-color: var(--lime);
  border: none;
  border-radius: 0.5rem;
  color: var(--slate-900);
  font-family: inherit;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  transition: background-color 0.3s;
  margin-top: 1rem;
}

.calculate-btn:hover, .calculate-btn:focus {
  background-color: hsl(61, 70%, 45%);
}

.results-section {
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--slate-300);
}

.results-section h2 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  color: var(--slate-900);
}

.results-section p {
  color: var(--slate-500);
  margin-bottom: 1.5rem;
}

.results-data {
  display: grid;
  gap: 1.5rem;
}

.result-item {
  background-color: var(--slate-100);
  padding: 1.5rem;
  border-radius: 0.5rem;
}

.result-item h3 {
  font-size: 1rem;
  color: var(--slate-700);
  margin-bottom: 0.5rem;
}

.result-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--slate-900);
  margin: 0;
}

.hidden {
  display: none;
}

.attribution {
  font-size: 11px;
  text-align: center;
  color: var(--slate-700);
  margin-top: auto;
}

.attribution a {
  color: hsl(228, 45%, 44%);
}

/* Error state */
.error input {
  border-color: var(--red);
}

.error-message {
  color: var(--red);
  font-size: 0.875rem;
  margin-top: 0.25rem;
}

/* Responsive design */
@media (min-width: 768px) {
  .calculator-container {
    padding: 2rem;
  }

  h1 {
    font-size: 2rem;
  }
  
  .calculator-icon {
    width: 32px;
    height: 32px;
  }
  
  .calculator-content {
    flex-direction: row;
    gap: 2rem;
  }
  
  .calculator-form {
    flex: 1;
  }
  
  .results-container {
    flex: 1;
    display: flex;
    flex-direction: column;
  }
  
  .results-section {
    margin-top: 0;
    padding-top: 0;
    border-top: none;
    border-left: 1px solid var(--slate-300);
    padding-left: 2rem;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
  }
  
  .results-data {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 1024px) {
  .calculator-container {
    padding: 2.5rem;
  }
  
  .calculator-content {
    gap: 3rem;
  }
}