*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: #f4f6f9;
  color: #1a1a2e;
  line-height: 1.5;
}

header {
  background: #1a1a2e;
  color: #fff;
  padding: 1.5rem 0;
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
  text-align: center;
}

header h1 {
  margin: 0 0 0.25rem;
  font-size: 1.5rem;
}

header p {
  margin: 0;
  opacity: 0.85;
  font-size: 0.95rem;
}

.badge {
  display: inline-block;
  margin-top: 0.75rem;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge.on {
  background: #22c55e33;
  color: #86efac;
}

.badge.off {
  background: #f59e0b33;
  color: #fcd34d;
}

main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.5rem 2rem 3rem;
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

@media (max-width: 768px) {
  .grid {
    grid-template-columns: 1fr;
  }
}

.field label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.4rem;
  font-size: 0.9rem;
}

textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  font-family: 'Cascadia Code', 'Fira Code', Consolas, monospace;
  font-size: 0.85rem;
  resize: vertical;
  background: #fff;
}

textarea:focus {
  outline: 2px solid #3b82f6;
  border-color: transparent;
}

.actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 1rem;
}

button {
  padding: 0.6rem 1.2rem;
  border: none;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
}

.btn-primary {
  background: #3b82f6;
  color: #fff;
}

.btn-primary:hover {
  background: #2563eb;
}

.btn-secondary {
  background: #e2e8f0;
  color: #334155;
}

.btn-secondary:hover {
  background: #cbd5e1;
}

.resultado {
  margin-top: 2rem;
  background: #fff;
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  border: 1px solid #e2e8f0;
}

.resultado.hidden {
  display: none;
}

.resumo {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0 0 1rem;
}

.diff-card {
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 1rem;
  margin-bottom: 0.75rem;
  background: #f8fafc;
}

.diff-card .linha {
  font-weight: 700;
  color: #dc2626;
  margin-bottom: 0.5rem;
}

.diff-card .code-row {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 0.5rem;
  font-family: 'Cascadia Code', Consolas, monospace;
  font-size: 0.82rem;
  margin-bottom: 0.25rem;
}

.diff-card .tag {
  font-weight: 600;
  color: #64748b;
}

.diff-card .tag.orig {
  color: #16a34a;
}

.diff-card .tag.mut {
  color: #dc2626;
}

.diff-card .classificacao {
  margin-top: 0.5rem;
  font-size: 0.85rem;
  color: #475569;
}

.ia-box {
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid #e2e8f0;
}

.ia-box.hidden {
  display: none;
}

.ia-box h3 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
}

.ia-box pre {
  white-space: pre-wrap;
  font-family: inherit;
  font-size: 0.9rem;
  margin: 0;
  color: #334155;
}

.aviso {
  margin-top: 0.75rem;
  font-size: 0.85rem;
  color: #b45309;
}

.aviso.hidden {
  display: none;
}

.erro {
  color: #dc2626;
  font-weight: 600;
}