/**
 * F-Gas calculators — UX 11 (touch 44px, live results, no horizontal scroll)
 */

:root {
  --fgas-tab-tools: #5ec9e8;
}

.fgas-tab--tools,
.fgas-hub-card--tools {
  --fgas-tab-accent: var(--fgas-tab-tools);
}

.fgas-tools {
  max-width: var(--fgas-prose-max);
  margin: 0 auto;
  width: 100%;
}

.fgas-tab-bar--tools {
  margin-bottom: 1.25rem;
}

.fgas-tab-bar--tools .fgas-tab-bar-scroll {
  flex-wrap: wrap;
}

@media (max-width: 640px) {
  .fgas-tab-bar--tools .fgas-tab-bar-scroll {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 6px;
    scrollbar-width: thin;
  }
  .fgas-tab-bar--tools .fgas-tab {
    flex: 0 0 auto;
  }
}

.fgas-tab--locked {
  opacity: 0.55;
  cursor: not-allowed;
}

.fgas-tool-panel {
  background: var(--rfb-surface);
  border: 1px solid var(--rfb-border);
  border-left: 4px solid var(--fgas-tab-tools);
  border-radius: var(--rfb-radius);
  padding: clamp(1rem, 3vw, 1.5rem);
  margin-bottom: 1rem;
}

.fgas-tool-panel--hidden {
  display: none;
}

.fgas-tool-panel h2 {
  margin-top: 0;
  font-size: 1.25rem;
}

.fgas-tool-fields {
  display: grid;
  gap: 0.75rem 1rem;
  margin: 1rem 0;
}

.fgas-tool-label {
  display: block;
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 0.35rem;
}

.fgas-tool-check {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-height: var(--fgas-touch, 44px);
  font-weight: 600;
  cursor: pointer;
}

.fgas-tool-check input {
  width: 1.25rem;
  height: 1.25rem;
  flex-shrink: 0;
}

.fgas-tool-input {
  width: 100%;
  min-height: var(--fgas-touch, 44px);
  padding: 10px 14px;
  font-size: 1.125rem;
  line-height: 1.3;
  border: 2px solid var(--rfb-border);
  border-radius: var(--rfb-radius);
  background: var(--rn-n800);
  color: var(--rn-white);
  box-sizing: border-box;
  max-width: 100%;
}

.fgas-tool-input:focus-visible {
  border-color: var(--fgas-tab-tools);
}

.fgas-tool-input:disabled {
  opacity: 0.5;
}

.fgas-tool-result {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1rem;
  padding: 1rem;
  background: color-mix(in srgb, var(--fgas-tab-tools) 12%, var(--rn-n800));
  border-radius: var(--rfb-radius);
  margin: 1rem 0;
}

.fgas-tool-result-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--rn-n300);
  flex: 1 1 100%;
}

@media (min-width: 480px) {
  .fgas-tool-result-label {
    flex: 0 0 auto;
  }
}

.fgas-tool-result-value {
  font-size: clamp(1.25rem, 4vw, 1.5rem);
  font-weight: 700;
  color: var(--fgas-tab-tools);
  flex: 1 1 auto;
  min-width: 0;
  word-break: break-word;
}

.fgas-tool-result-value--block {
  flex: 1 1 100%;
}

.fgas-tool-copy {
  min-height: var(--fgas-touch, 44px);
  min-width: 5.5rem;
  padding: 10px 16px;
  font: inherit;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--rfb-radius);
  border: 2px solid color-mix(in srgb, var(--fgas-tab-tools) 55%, var(--rfb-border));
  background: var(--rn-n700);
  color: var(--rn-white);
  cursor: pointer;
}

.fgas-tool-copy:hover:not(:disabled) {
  border-color: var(--fgas-tab-tools);
  background: color-mix(in srgb, var(--fgas-tab-tools) 20%, var(--rn-n700));
}

.fgas-tool-copy:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.fgas-tool-idiot {
  font-size: 0.95rem;
  color: var(--rn-n300);
  margin: 0.75rem 0 0;
  line-height: 1.5;
}

.fgas-tool-help {
  margin: 0.75rem 0;
  font-size: 0.9rem;
}

.fgas-tool-help summary {
  cursor: pointer;
  font-weight: 600;
  min-height: var(--fgas-touch, 44px);
  display: flex;
  align-items: center;
}

.fgas-tool-help ul {
  margin: 0.5rem 0 0 1.25rem;
  padding: 0;
}

.fgas-tool-lock {
  padding: 1rem;
  margin-bottom: 1rem;
  background: color-mix(in srgb, var(--fgas-tab-exam) 12%, var(--rn-n800));
  border-radius: var(--rfb-radius);
  border: 1px dashed var(--rfb-border);
}

.fgas-tool-fields--units {
  gap: 1.25rem;
}

.fgas-tool-unit-row {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 0.5rem 0.75rem;
  align-items: end;
}

.fgas-tool-unit-eq {
  align-self: center;
  text-align: center;
  color: var(--rn-n400);
  padding-bottom: 0.5rem;
}

@media (max-width: 520px) {
  .fgas-tool-unit-row {
    grid-template-columns: 1fr;
  }
  .fgas-tool-unit-eq {
    display: none;
  }
}

.fgas-tools-disclaimer {
  max-width: var(--fgas-prose-max);
  margin: 1.5rem auto 0;
}

@media (prefers-reduced-motion: reduce) {
  .fgas-tool-copy,
  .fgas-tool-panel,
  .fgas-tab {
    transition: none;
  }
}