.water-tool {
  padding: clamp(20px, 4vw, 32px);
  border: 1px solid #c7d9eb;
  border-radius: 18px;
  background: #f1f7fc;
}
.home-guide-footer p a { color: #165fbd; text-decoration: underline; text-underline-offset: 3px; }
.water-tool-fields {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin: 24px 0;
}
.water-tool-fields label { display: grid; align-content: start; gap: 8px; font-size: 14px; font-weight: 700; }
.water-tool-fields input, .water-tool-fields select {
  min-width: 0;
  width: 100%;
  min-height: 48px;
  padding: 12px;
  font: inherit;
  color: #081d3a;
  background: #fff;
  border: 1px solid #a8bdd1;
  border-radius: 8px;
}
.water-tool-fields input:focus-visible, .water-tool-fields select:focus-visible { outline: 3px solid #1966bb; outline-offset: 3px; }
.water-tool-fields input[aria-invalid="true"] { border: 2px solid #ae281c; }
.guide-article .water-tool-result { margin: 20px 0; padding: 18px; background: #fff; border-left: 4px solid #165fbd; border-radius: 8px; font-weight: 700; color: #081d3a; overflow-wrap: anywhere; }
.water-table table { min-width: 300px; width: 100%; }
.water-table caption { text-align: left; padding: 14px; font-weight: 700; }
.water-topic-panel { margin-top: 24px; grid-template-columns: minmax(0, 1fr); }
.water-topic-panel .water-topic-links { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin-top: 20px; }
.water-topic-links a { display: block; padding: 18px; border: 1px solid var(--line); border-radius: 12px; background: #fff; color: #165fbd; font-weight: 800; line-height: 1.5; }
.water-topic-links a:focus-visible { outline: 3px solid #1966bb; outline-offset: 3px; }
@media (max-width: 600px) {
  .water-tool-fields, .water-topic-panel .water-topic-links { grid-template-columns: minmax(0, 1fr); }
  .water-tool .button { width: 100%; white-space: normal; }
}