.tank-tool { margin-top: 1em; }
#calculator .calc_left {
  align-items: center;
  display: grid;
  gap: 0.35em;
  grid-template-columns: 3.8em minmax(0, 1fr);
  max-width: none;
  width: auto;
}
#calculator .calc_row_input,
#calculator .calc_row_select,
#calculator .calc_row_answer {
  align-items: center;
  display: grid;
  gap: 0.75em;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
}
#calculator .calc_right {
  box-sizing: border-box;
  padding-top: 0;
  width: auto;
}
#calculator .calc_row_input pre,
#calculator .calc_row_select pre,
#calculator .calc_row_answer pre {
  box-sizing: border-box;
  display: inline-flex;
  justify-content: center;
  width: 3.8em;
}
#calculator .calc_row_input input,
#calculator .calc_row_select select,
#calculator .calc_row_answer input {
  box-sizing: border-box;
  width: 100%;
}
.tank-answer { border: 2px solid #7fa7b6; background: #f3f9fb; padding: 1.1em; margin: 0 0 1em 0; position: relative; overflow: hidden; }
.tank-kicker { margin: 0 0 0.25em 0; color: #245162; font-weight: bold; text-transform: uppercase; letter-spacing: 0; }
.tank-answer-main { margin: 0 0 0.35em 0; font-size: 1.45em; line-height: 1.25; }
.tank-answer-main strong { color: #18333d; }
.tank-note { border-top: 1px solid #c5d6dc; color: #4b5b62; margin-top: 0.9em; padding-top: 0.75em; }
.tank-helper-intro { border-left: 4px solid #7fa7b6; background: #fff; padding: 0.75em 1em; margin: 0 0 1em 0; }
.tank-helper-intro h3 { margin: 0 0 0.25em 0; padding-top: 0; }
.tank-helper-intro p { margin: 0; color: #4b5b62; }
.tank-helper-note { border-left: 3px solid #7fa7b6; color: #4b5b62; padding-left: 0.75em; }
.tank-unit-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(126px, 1fr)); gap: 0.6em; margin: 1em 0; }
.tank-unit-grid div { border: 1px solid #c5d6dc; background: #fff; padding: 0.75em; text-align: center; }
.tank-unit-grid strong { display: block; font-size: 1.25em; line-height: 1.2; overflow-wrap: anywhere; }
.tank-unit-grid span { display: block; color: #555; line-height: 1.25; }
.tank-panel { border: 1px solid #ccd5df; background: #f7f8fa; padding: 1em; margin: 0 0 1em 0; }
.tank-panel h3 { padding-top: 0; }
.tank-panel h4 { margin-bottom: 0.25em; }
.tank-helper-choice { background: #fff; }
.tank-control-row { display: flex; flex-wrap: wrap; gap: 0.75em 1em; align-items: flex-end; }
.tank-control-row p { margin-top: 0; }
.tank-measure-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 0.75em; align-items: end; }
.tank-panel input,
.tank-panel select { max-width: 22em; width: 92%; padding: 0.45em; }
.tank-measure-grid input,
.tank-measure-grid select { width: 92%; }
.tank-helper-result,
.tank-measure-rate { border-top: 1px solid #d6dde5; margin-top: 0.85em; padding-top: 0.75em; }
.tank-helper-result strong,
.tank-measure-rate strong { font-size: 1.15em; color: #18333d; }
.tank-current-save { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 0.65em; margin: 0.85em 0 1em 0; }
.tank-current-save div { border: 1px solid #c5d6dc; background: #fff; padding: 0.7em; }
.tank-current-save strong { display: block; color: #18333d; overflow-wrap: anywhere; }
.tank-current-save span { display: block; color: #555; line-height: 1.3; margin-top: 0.25em; overflow-wrap: anywhere; }
.tank-tool button {
  appearance: none;
  -webkit-appearance: none;
  background: linear-gradient(180deg, #ffffff 0%, #dfe6e9 100%);
  border: 1px solid #708792;
  border-radius: 7px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.8), 0 1px 2px rgba(0,0,0,0.12);
  color: #14242b;
  cursor: pointer;
  display: inline-block;
  font: bold 1em Arial, sans-serif;
  line-height: 1.2;
  margin: 0.15em 0.25em 0.15em 0;
  min-height: 42px;
  padding: 0.65em 1em;
  text-align: center;
  text-decoration: none;
}
.tank-tool button:hover { background: linear-gradient(180deg, #ffffff 0%, #cfe2e8 100%); border-color: #4f7280; }
.tank-tool button:focus-visible { outline: 3px solid #91bdca; outline-offset: 2px; }
#use-known-tank,
#use-dimension-volume,
#use-known-rate,
#use-bucket-rate,
#copy-tank-result,
#save-fill-history,
#save-current-tank,
#save-current-rate { background: linear-gradient(180deg, #f7fdff 0%, #bfe0ea 100%); border-color: #5d8796; }
#clear-tank-saved,
#clear-tank-history { background: linear-gradient(180deg, #ffffff 0%, #e2e2e2 100%); border-color: #8b8b8b; color: #333; }
.tank-saved-list,
.tank-history-list { margin: 0.8em 0 1em 0; }
.tank-saved-item,
.tank-history-item { border: 1px solid #d6dde5; background: #fff; padding: 0.7em; margin-bottom: 0.55em; display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 0.35em 0.75em; align-items: center; }
.tank-saved-item strong,
.tank-history-item strong { display: block; color: #18333d; overflow-wrap: anywhere; }
.tank-saved-item span,
.tank-history-item span { display: block; color: #555; line-height: 1.3; overflow-wrap: anywhere; }
.tank-saved-actions { display: flex; flex-wrap: wrap; gap: 0.4em; grid-row: span 2; justify-content: flex-end; }
.tank-saved-item button { margin: 0; min-height: 36px; padding: 0.45em 0.8em; }
.tank-saved-item .tank-remove-button { background: linear-gradient(180deg, #ffffff 0%, #e2e2e2 100%); border-color: #8b8b8b; color: #333; }
.tank-history-item { grid-template-columns: minmax(8em, auto) minmax(0, 1fr); }

@media (max-width: 751px) {
  #calculator .calc_row_input,
  #calculator .calc_row_select,
  #calculator .calc_row_answer {
    grid-template-columns: minmax(0, 1fr);
  }
  #calculator .calc_left {
    grid-template-columns: minmax(0, 1fr);
  }
  #calculator .calc_row_input pre,
  #calculator .calc_row_select pre,
  #calculator .calc_row_answer pre {
    justify-self: center;
  }
  .tank-answer-main { font-size: 1.2em; }
  .tank-unit-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .tank-control-row { display: block; }
  .tank-saved-item,
  .tank-history-item { grid-template-columns: 1fr; }
  .tank-saved-actions { grid-row: auto; justify-content: stretch; }
  .tank-saved-item button { flex: 1 1 8em; }
}