/* Help page layout. Loaded only on /help. The FAQ uses native <details> and
   works without JS; the Ask Paka box adds the interactive search. */

/* ---- help hero ---- */
.help-hero { padding: 72px 0 8px; }
.help-hero .lead { margin-top: 18px; }
.help-hero .lead a.inl { color: var(--color-link); text-decoration: underline; text-underline-offset: 2px; }
.help-hero .lead a.inl:hover { text-decoration-thickness: 2px; }
/* ---- Ask Paka box ---- */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

.askbox {
  border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface);
  box-shadow: var(--shadow-card); padding: var(--space-6);
}
.askbox-head h2 { font-family: var(--font-display); font-weight: 800; font-size: 22px; letter-spacing: -0.01em; margin: 0; }
.askbox-sub { color: var(--color-text-muted); font-size: 14.5px; margin: 6px 0 0; }
.askbox-form { margin-top: var(--space-5); }
.askbox-row { display: flex; gap: 12px; }
.askbox-field { position: relative; flex: 1 1 auto; display: flex; }
.askbox-row input {
  flex: 1 1 auto; width: 100%; height: var(--control-lg); padding: 0 44px 0 16px; border-radius: 10px;
  border: 1px solid var(--color-border); background: var(--color-bg); color: var(--color-text);
  font-family: var(--font-body); font-size: 16px; transition: border-color var(--dur-fast), box-shadow var(--dur-fast);
}
.askbox-clear {
  position: absolute; right: 8px; top: 50%; transform: translateY(-50%);
  width: 30px; height: 30px; display: flex; align-items: center; justify-content: center;
  border: none; background: transparent; color: var(--color-text-subtle);
  font-size: 22px; line-height: 1; cursor: pointer; border-radius: 7px;
  transition: color var(--dur-fast), background var(--dur-fast);
}
.askbox-clear:hover { color: var(--color-text); background: color-mix(in srgb, var(--color-text) 6%, transparent); }
.askbox-clear[hidden] { display: none; }
.askbox-row input::placeholder { color: var(--color-text-subtle); }
.askbox-row input:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 4px color-mix(in srgb, var(--color-primary) 14%, transparent); }
.askbox-row .btn { flex: none; height: var(--control-lg); padding: 0 26px; }

.askbox-starters { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.chip {
  border: 1px solid var(--color-border); background: transparent; border-radius: 999px;
  padding: 7px 14px; font-family: var(--font-body); font-size: 13.5px; color: var(--color-text-muted);
  cursor: pointer; transition: border-color var(--dur-fast), color var(--dur-fast), background var(--dur-fast);
}
.chip:hover { border-color: color-mix(in srgb, var(--color-primary) 45%, var(--color-border)); color: var(--color-text); }
.chip--source { border-color: color-mix(in srgb, var(--color-primary) 40%, var(--color-border)); color: var(--color-primary); background: color-mix(in srgb, var(--color-primary) 8%, transparent); }
.chip--source:hover { background: color-mix(in srgb, var(--color-primary) 16%, transparent); }

.askbox-answer { margin-top: var(--space-5); padding-top: var(--space-5); border-top: 1px solid var(--color-border); min-height: 1.6em; }
.askbox-placeholder, .askbox-thinking { color: var(--color-text-subtle); font-size: 14.5px; margin: 0; }
.askbox-response { color: var(--color-text); font-size: 15.5px; line-height: 1.62; margin: 0; max-width: 68ch; text-wrap: pretty; white-space: pre-wrap; }
.askbox-handoff, .askbox-error { color: var(--color-text-muted); font-size: 14px; margin: 10px 0 0; }
.askbox-handoff a.inl, .askbox-error a.inl { color: var(--color-link); text-decoration: underline; text-underline-offset: 2px; }
.askbox-sources { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 16px; }
.askbox-sources-label { font-family: var(--font-mono); font-size: 11px; font-weight: 500; letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-text-subtle); margin-right: 2px; }

@media (max-width: 560px) {
  .askbox-row { flex-direction: column; }
  .askbox-row .btn { width: 100%; }
}

/* ---- topic cards ---- */
.topic-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.topic { display: flex; gap: 15px; align-items: flex-start; padding: 22px; border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface); box-shadow: var(--shadow-card); cursor: pointer; text-align: left; transition: border-color var(--dur-fast), transform var(--dur-instant); }
.topic:hover { border-color: color-mix(in srgb, var(--color-primary) 45%, var(--color-border)); }
.topic:active { transform: translateY(1px); }
.topic .t-ic { flex: none; width: 40px; height: 40px; border-radius: 10px; display: grid; place-items: center; background: color-mix(in srgb, var(--color-primary) 12%, transparent); color: var(--color-primary); }
.topic .t-ic svg { width: 21px; height: 21px; }
.topic .t-t { display: block; font-weight: 600; font-size: 16px; color: var(--color-text); }
.topic .t-d { display: block; color: var(--color-text-muted); font-size: 13.5px; line-height: 1.5; margin-top: 4px; }

/* ---- FAQ ---- */
.faq-wrap { display: grid; grid-template-columns: 240px 1fr; gap: 56px; align-items: start; }
/* Grid items default to min-width:auto and won't shrink below their widest child
   — the 620px .readings-ref tables — which blows the 1fr column (and all its body
   text) past the viewport on mobile. min-width:0 lets it collapse; the tables then
   scroll inside their own .tbl-scroll. */
.faq-wrap > * { min-width: 0; }
.faq-rail { position: sticky; top: 96px; }
.faq-rail h3 { font-family: var(--font-mono); font-size: 11px; font-weight: 500; letter-spacing: 0.14em; text-transform: uppercase; color: var(--color-text-subtle); margin: 0 0 14px; }
.faq-rail a { display: block; font-size: 14.5px; color: var(--color-text-muted); padding: 8px 0; transition: color var(--dur-fast); }
.faq-rail a:hover { color: var(--color-text); }
.faq-cat { margin-bottom: 48px; }
.faq-cat:last-child { margin-bottom: 0; }
.faq-cat > h2 { font-family: var(--font-display); font-weight: 800; font-size: 24px; letter-spacing: -0.01em; margin-bottom: 6px; scroll-margin-top: 90px; }
.faq-cat > .cat-sub { color: var(--color-text-subtle); font-size: 14px; margin: 0 0 18px; }
details.qa { border-bottom: 1px solid var(--color-border); }
details.qa[hidden] { display: none; }
details.qa summary {
  list-style: none; cursor: pointer; padding: 20px 40px 20px 0; position: relative;
  font-weight: 600; font-size: 16.5px; color: var(--color-text); line-height: 1.4;
}
details.qa summary::-webkit-details-marker { display: none; }
details.qa summary::after {
  content: ""; position: absolute; right: 6px; top: 24px; width: 11px; height: 11px;
  border-right: 2px solid var(--color-text-subtle); border-bottom: 2px solid var(--color-text-subtle);
  transform: rotate(45deg); transition: transform var(--dur-base) var(--ease-standard);
}
details.qa[open] summary::after { transform: rotate(-135deg); top: 28px; }
details.qa summary:hover { color: var(--color-primary); }
.qa-body { padding: 0 32px 22px 0; }
.qa-body p { color: var(--color-text-muted); font-size: 15px; line-height: 1.62; margin: 0 0 12px; max-width: 64ch; text-wrap: pretty; }
.qa-body p:last-child { margin-bottom: 0; }
.qa-body strong { color: var(--color-text); font-weight: 600; }
.qa-body a.inl { color: var(--color-link); text-decoration: underline; text-underline-offset: 2px; }
.qa-body code { font-family: var(--font-mono); font-size: 13px; background: var(--color-bg-deep); padding: 2px 6px; border-radius: 5px; }
.qa-body .nm-paka { font-weight: 600; }

/* ---- sensor readings reference ---- */
.readings-ref h3 { font-family: var(--font-display); font-weight: 800; font-size: 17px; letter-spacing: -0.01em; margin: 30px 0 6px; }
.readings-ref .grp-note { color: var(--color-text-muted); font-size: 14.5px; line-height: 1.62; margin: 0 0 14px; max-width: 68ch; text-wrap: pretty; }
.readings-ref .grp-note strong { color: var(--color-text); font-weight: 600; }
.readings-ref .tbl-scroll { overflow-x: auto; border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface); box-shadow: var(--shadow-card); margin: 0 0 16px; }
.readings-ref table { width: 100%; min-width: 620px; border-collapse: collapse; font-size: 14px; }
.readings-ref th { font-family: var(--font-mono); font-size: 11px; font-weight: 500; letter-spacing: 0.12em; text-transform: uppercase; color: var(--color-text-subtle); text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--color-border); }
.readings-ref td { padding: 12px 14px; border-bottom: 1px solid var(--color-border); color: var(--color-text-muted); line-height: 1.55; vertical-align: top; }
.readings-ref tbody tr:last-child td { border-bottom: none; }
.readings-ref td.rd-name { color: var(--color-text); font-weight: 600; white-space: nowrap; }
.readings-ref td.rd-unit { font-family: var(--font-mono); font-size: 12.5px; color: var(--color-primary); white-space: nowrap; }
.readings-ref td strong { color: var(--color-text); font-weight: 600; }


/* ---- still stuck CTA ---- */
.stuck { background: var(--color-bg-deep); border-top: 1px solid var(--color-border); }
.stuck-inner { display: flex; align-items: center; justify-content: space-between; gap: 30px; flex-wrap: wrap; }
.stuck h2 { font-family: var(--font-display); font-weight: 800; font-size: clamp(24px, 3vw, 32px); letter-spacing: -0.01em; }
.stuck p { color: var(--color-text-muted); font-size: 16px; margin: 10px 0 0; max-width: 46ch; }
.stuck-actions { display: flex; gap: 12px; flex-wrap: wrap; }

@media (max-width: 860px) {
  .topic-grid { grid-template-columns: 1fr; }
  .faq-wrap { grid-template-columns: 1fr; gap: 0; }
  .faq-rail { display: none; }
}