* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: #f4f6f8;
  color: #1f2937;
}

.container {
  max-width: 980px;
  margin: 0 auto;
  padding: 24px 16px 48px;
}

.hero {
  margin-bottom: 20px;
}

.hero h1 {
  margin: 0 0 8px;
  font-size: 2rem;
}

.hero p {
  margin: 0;
  line-height: 1.5;
}

.card {
  background: #fff;
  border: 1px solid #dbe2ea;
  border-radius: 14px;
  padding: 18px;
  margin-bottom: 18px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.04);
}

.card h2 {
  margin-top: 0;
  font-size: 1.2rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.field-base {
  grid-column: 1;
  grid-row: 1;
}

.field-inflation {
  grid-column: 1;
  grid-row: 2;
}

.field-death {
  grid-column: 2;
  grid-row: 2;
}

.field-compare-one {
  grid-column: 1;
  grid-row: 3;
}

.field-compare-two {
  grid-column: 2;
  grid-row: 3;
}

.actions {
  grid-column: 1 / -1;
  grid-row: 4;
  display: flex;
  gap: 10px;
  padding-top: 4px;
}

label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-weight: 600;
  overflow-wrap: break-word;
}

input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #c5d0db;
  border-radius: 10px;
  font-size: 1rem;
}

button {
  border: 0;
  border-radius: 10px;
  padding: 11px 16px;
  font-size: 1rem;
  cursor: pointer;
  background: #1d4ed8;
  color: #fff;
}

button.secondary {
  background: #6b7280;
}

.messages {
  min-height: 20px;
}

.message {
  padding: 10px 12px;
  border-radius: 10px;
  margin-bottom: 8px;
  line-height: 1.45;
}

.message.error {
  background: #fef2f2;
  color: #991b1b;
  border: 1px solid #fecaca;
}

.message.info {
  background: #eff6ff;
  color: #1e3a8a;
  border: 1px solid #bfdbfe;
}

.results.empty {
  color: #6b7280;
}

.results h3 {
  margin-bottom: 8px;
}

.results p {
  margin: 6px 0;
  line-height: 1.45;
}

.results .block {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid #e5e7eb;
}

.comparison-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 10px;
}

.comparison-columns .block {
  border: 1px solid #e5e7eb;
  border-radius: 10px;
  padding: 10px;
  background: #fafafa;
  margin-top: 0;
}

/* MOBILE OPTIMIZATION */
@media (max-width: 720px) {
  .container {
    padding: 16px 10px 32px;
  }

  .hero {
    margin-bottom: 14px;
  }

  .hero h1 {
    font-size: 1.55rem;
    line-height: 1.2;
  }

  .hero p {
    font-size: 0.95rem;
    line-height: 1.35;
  }

  .card {
    padding: 14px;
    margin-bottom: 14px;
  }

  .card h2 {
    font-size: 1.05rem;
    line-height: 1.25;
  }

  .grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  label {
    font-size: 0.92rem;
    line-height: 1.3;
    gap: 5px;
  }

  input {
    font-size: 1rem;
    padding: 12px 10px;
  }

  .actions {
    flex-direction: column;
    gap: 8px;
  }

  button {
    width: 100%;
    padding: 12px 14px;
    font-size: 1rem;
  }

  .results h3 {
    font-size: 1rem;
    line-height: 1.25;
  }

  .results p,
  .message {
    font-size: 0.95rem;
    line-height: 1.35;
  }

  .comparison-columns {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .comparison-columns .block {
    padding: 10px;
  }
}