.tool-page { padding: 36px 0 72px; }
.tool-page h1 {
  font-family: var(--display);
  font-weight: 800;
  letter-spacing: -0.04em;
  font-size: clamp(2.2rem, 4vw, 3.4rem);
  line-height: 1.05;
  margin: 10px 0 12px;
}
.tool-crumbs { margin: 0; }
.tool-crumbs a { color: var(--lake); }
.tool-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(280px, 0.95fr);
  gap: 22px;
  margin-top: 28px;
  align-items: start;
}
.tool-form,
.tool-result {
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 22px 22px 24px;
}
.tool-form h2,
.tool-result h2 {
  font-family: var(--display);
  font-size: 1.15rem;
  letter-spacing: -0.03em;
  margin: 0 0 16px;
}
.tool-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.tool-grid .is-wide { grid-column: 1 / -1; }
.tool-form input[type="number"]::-webkit-outer-spin-button,
.tool-form input[type="number"]::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.tool-form input[type="number"] { -moz-appearance: textfield; appearance: textfield; }
.tool-check {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  margin-top: 14px;
  font-size: 0.95rem;
}
.tool-total {
  font-family: var(--display);
  font-weight: 800;
  letter-spacing: -0.04em;
  font-size: clamp(2rem, 4vw, 2.8rem);
  line-height: 1;
  margin: 0 0 6px;
}
.tool-total-note { margin: 0 0 18px; color: var(--muted); }
.tool-rows { display: grid; gap: 0; margin: 0; }
.tool-rows div {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 0;
  border-top: 1px solid var(--line);
}
.tool-rows dt { color: var(--muted); }
.tool-rows dd { margin: 0; font-weight: 650; }
.tool-rows .is-sum dt,
.tool-rows .is-sum dd { font-weight: 800; color: var(--ink); }
.tool-index { padding: 56px 0 88px; }

.tool-index h1 {
  font-family: var(--display);
  font-weight: 800;
  letter-spacing: -0.045em;
  font-size: clamp(2.6rem, 5vw, 4rem);
  line-height: 0.95;
  margin: 8px 0 14px;
}

.tool-index .lede {
  max-width: 34rem;
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.55;
}

.tool-index-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 36px;
}

.tool-index-grid a {
  display: flex;
  flex-direction: column;
  min-height: 188px;
  padding: 18px 16px 16px;
  background: #fff;
  border: 1px solid #121410;
  text-decoration: none;
  color: inherit;
}

.tool-index-grid b {
  font-family: var(--display);
  font-weight: 800;
  letter-spacing: -0.04em;
  color: #1f6b4a;
}

.tool-index-grid strong {
  display: block;
  margin-top: 14px;
  font-family: var(--display);
  font-size: 1.28rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.tool-index-grid p {
  margin: auto 0 0;
  padding-top: 12px;
  color: #6a6e62;
  font-size: 0.9rem;
  line-height: 1.4;
}

.tool-index-grid a:hover { background: #121410; color: #f4f2eb; }
.tool-index-grid a:hover b { color: #d6f25c; }
.tool-index-grid a:hover p { color: rgba(244, 242, 235, 0.72); }

.tool-next {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 28px;
}
.tool-next a {
  display: block;
  padding: 14px 14px 12px;
  border: 1px solid var(--line);
  text-decoration: none;
  color: inherit;
  background: #fff;
}
.tool-next a:hover { border-color: #121410; }
.tool-next strong { display: block; margin-top: 4px; }
.tool-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.tool-pair article {
  border: 1px solid var(--line);
  padding: 14px;
  background: #fff;
}
.tool-pair article.is-low { border-color: #1f6b4a; background: #f3f7f1; }
.tool-pair strong {
  display: block;
  font-family: var(--display);
  font-size: 1.6rem;
  letter-spacing: -0.03em;
  margin-top: 6px;
}
@media (max-width: 980px) {
  .tool-index-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 860px) {
  .tool-layout,
  .tool-grid,
  .tool-pair,
  .tool-next { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .tool-index { padding: 36px 0 56px; }
  .tool-index-grid { grid-template-columns: 1fr; }
}