:root {
  --primary: #4361ee;
  --primary-dark: #3a56d4;
  --secondary: #7209b7;
  --accent: #f72585;
  --light: #f8f9fa;
  --dark: #212529;
  --gray: #2a3036;
  --black: #000;
  --success: #4cc9f0;
  --border-radius: 12px;
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
}

/* Calculator Card */
.calculator-card {
  background: var(--light);
  padding: 2rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  text-align: center;
  margin-bottom: 3rem;
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.converter-box {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin: 2rem 0;
  flex-wrap: wrap;
}

.input-group {
  display: flex;
  flex-direction: column;
  text-align: left;
}

.input-group label {
  font-size: 0.875rem;
  color: var(--gray);
  margin-bottom: 0.5rem;
  font-weight: 600;
}

input {
  padding: 12px;
  border: 2px solid #e2e8f0;
  border-radius: 8px;
  font-size: 1.25rem;
  width: 150px;
  transition: var(--transition);
}

input:focus {
  border-color: var(--primary);
  outline: none;
  box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.1);
}

.icon {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--gray);
  margin-top: 1.5rem;
}

.helper-text {
  font-size: 0.9rem;
  color: var(--primary);
  font-weight: 500;
}

/* Grid Section */
.content-section h2,
.faq-section h2 {
  text-align: center;
  margin-bottom: 1.5rem;
  color: var(--dark);
}

.conversion-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
  margin-bottom: 3rem;
}

.grid-item {
  background: var(--light);
  padding: 1rem;
  border-radius: 8px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  text-align: center;
  font-size: 0.95rem;
  transition: var(--transition);
}

.grid-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.grid-item strong {
  color: var(--primary);
}

@media (max-width: 600px) {
  .converter-box {
    flex-direction: column;
  }
  .icon {
    transform: rotate(90deg);
    margin: 0;
  }
  input {
    width: 100%;
  }
}

/* Additional enhancements for consistency */
* {
  box-sizing: border-box;
}

body {
  background-color: #f5f7fb;
  color: var(--dark);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, sans-serif;
}