/* Profit Margin — Tool-specific styles */
.page { padding: 40px 20px; max-width: 800px; margin: 0 auto; }
.page h1 { font-size: 26px; font-weight: 700; color: #fff; margin-bottom: 6px; }
.page .subtitle { color: #888; margin-bottom: 20px; font-size: 14px; }

.mode-row { display: flex; gap: 6px; margin-bottom: 18px; }
.toggle { cursor: pointer; flex: 1; }
.toggle input { display: none; }
.toggle span {
  display: block; padding: 9px 12px;
  background: #161616; border: 1px solid #2a2a2a; border-radius: 6px;
  color: #aaa; font-size: 13px; text-align: center;
  transition: all 0.15s;
}
.toggle input:checked + span {
  background: #2a0a0a; border-color: #ff4444; color: #fff;
}

.forward-grid, .reverse-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 12px; margin-bottom: 20px;
}
.input-group label {
  display: block; font-size: 12px; color: #aaa;
  margin-bottom: 6px; font-weight: 500;
}
.input-group input {
  width: 100%; padding: 12px;
  background: #0d0d0d; color: #fff;
  border: 1px solid #2a2a2a; border-radius: 6px;
  font-size: 18px; font-weight: 600;
  font-family: 'SF Mono', Menlo, monospace;
}
.input-group input:focus { border-color: #ff4444; outline: none; }

.results {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}
.result-card {
  padding: 14px;
  background: #0d0d0d; border: 1px solid #2a2a2a;
  border-radius: 8px; text-align: center;
}
.result-card.highlight { border-color: #ff4444; background: rgba(255,68,68,0.05); }
.result-label { font-size: 11px; color: #888; margin-bottom: 4px; text-transform: uppercase; letter-spacing: 0.5px; }
.result-value {
  font-size: 24px; font-weight: 700; color: #fff;
  font-family: 'SF Mono', Menlo, monospace;
}
.result-card.highlight .result-value { color: #ff6666; }

.info-block table { width: 100%; border-collapse: collapse; margin: 14px 0; font-size: 13px; }
.info-block th, .info-block td {
  padding: 7px 10px; text-align: left; border-bottom: 1px solid #1f1f1f;
}
.info-block th { color: #fff; font-weight: 600; font-size: 12px; }
.info-block td { color: #ccc; }

@media (max-width: 600px) {
  .page { padding: 24px 12px; }
  .page h1 { font-size: 22px; }
  .forward-grid, .reverse-grid { grid-template-columns: 1fr; }
  .results { grid-template-columns: 1fr 1fr; }
}