/* Card holding the whole checker; white card on the page background. */
.tool-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  background: var(--white);
  color: var(--ink);
  box-shadow: var(--shadow);
  margin: 18px 0 28px;
}
.tool-card h2 {
  border: none;
  margin-top: 0;
}

/* Fieldset groups: symptoms, spring type, stuck position. */
.tool-fieldset {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px 10px;
  margin: 0 0 16px;
}
.tool-fieldset legend {
  font-weight: 800;
  color: var(--navy);
  padding: 0 8px;
}

/* Large tap targets: full-width label rows, roomy checkboxes/radios. */
.tool-check {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 8px;
  margin: 0 0 6px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 17px;
  line-height: 1.5;
}
.tool-check:hover {
  background: var(--pale);
}
.tool-check input {
  width: 24px;
  height: 24px;
  min-width: 24px;
  margin-top: 2px;
  accent-color: var(--navy);
  cursor: pointer;
}

/* Inline validation error: dark text on a pale gold wash, never red-on-white alone. */
.tool-error {
  border: 1px solid var(--gold);
  border-left: 6px solid var(--gold);
  background: var(--warm);
  color: var(--ink);
  border-radius: var(--radius);
  padding: 12px 16px;
  font-weight: 700;
  margin: 0 0 16px;
}

/* Primary action button: navy pill with gold hover, full width on small screens. */
.tool-btn {
  display: inline-block;
  min-height: 52px;
  padding: 12px 26px;
  border: none;
  border-radius: 999px;
  background: var(--navy);
  color: var(--white);
  font-size: 17px;
  font-weight: 800;
  cursor: pointer;
}
.tool-btn:hover,
.tool-btn:active {
  background: var(--navy-dark);
}

/* Result panel: white card, dark text throughout, gold left rule. */
.tool-result {
  border: 1px solid var(--line);
  border-left: 6px solid var(--gold);
  border-radius: var(--radius);
  padding: 20px 22px;
  background: var(--white);
  color: var(--ink);
  box-shadow: var(--shadow);
  margin-top: 22px;
}
.tool-result h3 {
  color: var(--navy);
  margin-top: 0;
}
.tool-result h4 {
  color: var(--navy);
  margin: 18px 0 8px;
}
.tool-result ul {
  margin: 0 0 14px;
  padding-left: 22px;
}
.tool-result li {
  margin-bottom: 6px;
}

/* Safety warning inside the result: always visible, never light-on-light. */
.tool-safety {
  background: var(--warm);
  border: 1px solid var(--gold);
  border-radius: var(--radius);
  padding: 14px 16px;
  color: var(--ink);
}

@media (max-width: 600px) {
  .tool-card {
    padding: 16px;
  }
  .tool-btn {
    width: 100%;
  }
}