.tools-hero {
  padding: 78px 0 58px;
  background: linear-gradient(145deg, #07111a 0%, #0d2630 72%, #164542 100%);
  color: var(--paper-2);
}
.tools-hero h1 {
  max-width: 900px;
  margin: 14px 0 18px;
  font-family: "Newsreader", serif;
  font-size: clamp(3rem, 6vw, 6rem);
  line-height: .96;
  letter-spacing: -.055em;
}
.tools-hero p { max-width: 760px; color: #c7d4d7; }
.tools-jump {
  display: flex;
  gap: 9px;
  flex-wrap: wrap;
  margin-top: 26px;
}
.tools-jump a {
  border: 1px solid rgba(255,255,255,.24);
  border-radius: 999px;
  padding: 8px 13px;
  color: #edf6f4;
  text-decoration: none;
  font-size: .76rem;
}
.tools-jump a:hover { background: rgba(255,255,255,.09); color: #fff; }
.tools-intro {
  display: grid;
  grid-template-columns: 1fr .45fr;
  gap: 60px;
  align-items: start;
}
.tools-intro__note {
  border-left: 2px solid var(--copper);
  padding: 2px 0 2px 22px;
  color: var(--ink-700);
  font-size: .86rem;
}
.tools-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}
.tool-card {
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 26px;
  box-shadow: var(--shadow-sm);
}
.tool-card__index {
  display: block;
  margin-bottom: 12px;
  color: var(--mineral-dark);
  font: 500 .68rem/1.2 "IBM Plex Mono", monospace;
  letter-spacing: .1em;
  text-transform: uppercase;
}
.tool-card h2 {
  margin: 0 0 8px;
  font-family: "Newsreader", serif;
  font-size: 2rem;
  line-height: 1;
  letter-spacing: -.035em;
}
.tool-card > p { margin: 0 0 20px; color: var(--ink-600); font-size: .86rem; }
.tool-fields {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 11px;
}
.tool-fields--two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.tool-field label {
  display: block;
  min-height: 34px;
  margin-bottom: 6px;
  color: var(--ink-700);
  font-size: .72rem;
  line-height: 1.35;
  font-weight: 600;
}
.tool-field input,
.tool-field select {
  width: 100%;
  height: 44px;
  border: 1px solid #b9b3a8;
  border-radius: 10px;
  background: #fff;
  color: var(--ink-950);
  padding: 0 11px;
}
.tool-field input:focus,
.tool-field select:focus {
  outline: 3px solid rgba(31,105,103,.18);
  border-color: var(--mineral);
}
.tool-action {
  margin-top: 14px;
  min-height: 44px;
  border: 0;
  border-radius: 999px;
  padding: 0 18px;
  background: var(--ink-950);
  color: var(--paper-2);
  font-weight: 600;
  cursor: pointer;
}
.tool-result {
  min-height: 104px;
  margin-top: 18px;
  padding: 17px;
  border-radius: 14px;
  background: #ece8df;
  border: 1px solid #d7d1c6;
}
.tool-result > span,
.tool-result > small { display: block; color: var(--ink-600); font-size: .72rem; }
.tool-result > strong {
  display: block;
  margin: 3px 0;
  color: var(--ink-950);
  font: 600 1.65rem/1.1 "Newsreader", serif;
}
.tool-table-wrap { overflow-x: auto; margin-top: 8px; }
.tool-table { width: 100%; border-collapse: collapse; font-size: .75rem; }
.tool-table th,
.tool-table td { text-align: left; padding: 7px 8px; border-bottom: 1px solid #d2ccc0; }
.tool-table th { color: var(--ink-700); }
.formula-band {
  margin-top: 22px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.formula-band div { padding: 20px; background: #e5e0d4; }
.formula-band div + div { border-left: 1px solid #c8c1b5; }
.formula-band code { display: block; margin-bottom: 6px; color: var(--mineral-dark); }
.formula-band span { font-size: .78rem; color: var(--ink-700); }
@media (max-width: 880px) {
  .tools-intro { grid-template-columns: 1fr; gap: 24px; }
  .tools-grid { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .tools-hero { padding: 54px 0 40px; }
  .tool-card { padding: 20px; }
  .tool-fields,
  .tool-fields--two { grid-template-columns: 1fr; }
  .tool-field label { min-height: auto; }
  .formula-band { grid-template-columns: 1fr; }
  .formula-band div + div { border-left: 0; border-top: 1px solid #c8c1b5; }
}