/* ---------------------------------------------------------------------------
   Non-critical CSS.

   Loaded with <link rel="preload" as="style" onload="this.rel='stylesheet'">
   from BaseLayout so it never blocks the first render. Everything needed for
   the header, the hero and the tool is inlined in BaseLayout instead — this
   file only styles what appears below the fold.

   Cached immutable. Bump CSS_VERSION in BaseLayout.astro when this changes.
   --------------------------------------------------------------------------- */

/* ------------------------------ article ---------------------------------- */

.prose {
  max-width: var(--measure);
}

.prose > * + * {
  margin-top: 1.1em;
}

.prose h2 {
  font-size: clamp(1.35rem, 1.1rem + 1.1vw, 1.75rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-top: 2.4em;
  scroll-margin-top: 1rem;
  text-wrap: balance;
}

.prose h3 {
  font-size: clamp(1.1rem, 1rem + 0.5vw, 1.3rem);
  line-height: 1.25;
  letter-spacing: -0.015em;
  margin-top: 1.9em;
  scroll-margin-top: 1rem;
}

.prose h4 {
  font-size: 1.02rem;
  margin-top: 1.6em;
  color: var(--ink);
}

.prose h2 + p,
.prose h3 + p,
.prose h4 + p {
  margin-top: 0.6em;
}

.prose p,
.prose li {
  color: var(--ink);
}

.prose ul,
.prose ol {
  padding-left: 1.35rem;
}

.prose li + li {
  margin-top: 0.4em;
}

.prose strong {
  font-weight: 700;
}

.prose mark {
  background: var(--accent-soft);
  color: var(--ink);
  padding: 0.05em 0.2em;
  border-radius: 3px;
}

.prose blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 1rem;
  color: var(--ink-2);
  font-style: normal;
}

.prose code {
  font-family: var(--mono);
  font-size: 0.92em;
  background: var(--surface-2);
  padding: 0.1em 0.3em;
  border-radius: 4px;
}

.prose hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin-block: 2.4em;
}

/* Answer-first block: the 40-60 word direct answer, first thing after the H1. */
.answer {
  background: var(--accent-soft);
  border-left: 4px solid var(--accent);
  border-radius: 0 8px 8px 0;
  padding: 0.9rem 1.1rem;
  font-size: 1.05rem;
}

.answer p {
  margin: 0;
}

.answer p + p {
  margin-top: 0.6rem;
}

.callout {
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 4px solid var(--ink-3);
  border-radius: 0 8px 8px 0;
  padding: 0.9rem 1.1rem;
  font-size: 0.97rem;
}

.callout--warn {
  background: var(--warn-soft);
  border-left-color: var(--warn);
}

.callout h3,
.callout h4 {
  margin-top: 0;
  font-size: 1rem;
}

/* -------------------------------- tables --------------------------------- */

.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.95rem;
  font-variant-numeric: tabular-nums;
}

caption {
  caption-side: top;
  text-align: left;
  padding: 0.75rem 0.9rem 0.35rem;
  font-size: 0.85rem;
  color: var(--ink-2);
}

th,
td {
  padding: 0.55rem 0.9rem;
  text-align: left;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}

thead th {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-3);
  background: var(--surface-2);
  position: sticky;
  top: 0;
}

tbody tr:last-child td {
  border-bottom: 0;
}

td.num,
th.num {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* ---------------------------- page furniture ----------------------------- */

.page {
  padding-block: clamp(1.25rem, 3vw, 2.25rem) clamp(2.5rem, 6vw, 4rem);
}

.breadcrumbs {
  font-size: 0.85rem;
  color: var(--ink-3);
  margin-bottom: 1rem;
}

.breadcrumbs ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: 0;
  padding: 0;
}

.breadcrumbs li + li::before {
  content: '/';
  margin-right: 0.35rem;
  color: var(--line-2);
}

.breadcrumbs a {
  color: var(--ink-2);
}

.article-head h1 {
  font-size: clamp(1.7rem, 1.2rem + 2.4vw, 2.6rem);
  line-height: 1.13;
  letter-spacing: -0.028em;
  max-width: 22ch;
  text-wrap: balance;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1rem;
  font-size: 0.85rem;
  color: var(--ink-3);
  margin-top: 0.9rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--line);
}

.article-meta__entity {
  color: var(--ink-2);
  font-weight: 600;
}

/* ------------------------------ layout grid ------------------------------ */

.with-aside {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}

@media (min-width: 62rem) {
  .with-aside {
    grid-template-columns: minmax(0, 1fr) 17rem;
  }
  .with-aside > aside {
    position: sticky;
    top: 1.5rem;
  }
}

aside .aside-box {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  font-size: 0.92rem;
}

aside .aside-box + .aside-box {
  margin-top: 1rem;
}

aside .aside-box h2 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-3);
  margin-bottom: 0.6rem;
}

aside .aside-box ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

aside .aside-box li + li {
  margin-top: 0.5rem;
}

/* ------------------------- table of contents ----------------------------- */

.toc {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.15rem;
}

.toc h2 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-3);
  margin: 0 0 0.6rem;
}

.toc ol {
  margin: 0;
  padding-left: 1.2rem;
  font-size: 0.94rem;
}

.toc li + li {
  margin-top: 0.35rem;
}

/* ------------------------------ card lists ------------------------------- */

.cards {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.9rem;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
}

.card h3 {
  font-size: 1.02rem;
  line-height: 1.3;
  margin: 0 0 0.35rem;
  letter-spacing: -0.01em;
}

.card h3 a {
  text-decoration: none;
}

.card h3 a:hover {
  text-decoration: underline;
}

.card p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--ink-2);
}

.card__tag {
  display: inline-block;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 700;
  color: var(--ink-3);
  margin-bottom: 0.4rem;
}

/* ------------------------------- retailers ------------------------------- */

.retailers {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
}

.retailers h2,
.retailers h3,
.retailers h4 {
  margin: 0 0 0.3rem;
  font-size: 1.02rem;
}

.affiliate-disclosure {
  font-size: 0.85rem;
  color: var(--ink-2);
  background: var(--surface-2);
  border-radius: 6px;
  padding: 0.5rem 0.7rem;
  margin: 0.5rem 0 0.85rem;
}

.retailers ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.retailer-link {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 0.6rem;
  min-height: 48px;
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--control-border);
  border-radius: 8px;
  text-decoration: none;
  color: var(--ink);
  background: var(--paper);
}

.retailer-link:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.retailer-link__name {
  font-weight: 650;
}

.retailer-link__meta {
  font-size: 0.82rem;
  color: var(--ink-3);
}

.retailer-link__used {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
  color: var(--accent);
}

/* ---------------------------------- FAQ ---------------------------------- */

.faq {
  display: grid;
  gap: 0.6rem;
}

.faq details {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.faq summary {
  cursor: pointer;
  padding: 0.85rem 1rem;
  font-weight: 650;
  min-height: 48px;
  display: flex;
  align-items: center;
  list-style: none;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::after {
  content: '+';
  margin-left: auto;
  font-weight: 400;
  font-size: 1.3rem;
  color: var(--ink-3);
  line-height: 1;
}

.faq details[open] summary::after {
  content: '\2212';
}

.faq details > div {
  padding: 0 1rem 1rem;
  color: var(--ink-2);
}

.faq details > div > * + * {
  margin-top: 0.7rem;
}

/* ------------------------------ tool extras ------------------------------ */

.tool__note {
  font-size: 0.88rem;
  color: var(--ink-2);
  margin-top: 0.85rem;
  padding-top: 0.85rem;
  border-top: 1px dashed var(--line-2);
}

.tool__note ul {
  margin: 0.45rem 0 0;
  padding-left: 1.2rem;
}

.tool__note li + li {
  margin-top: 0.35rem;
}

.tool__flag {
  margin-top: 0.85rem;
  padding: 0.7rem 0.9rem;
  border-radius: 8px;
  font-size: 0.92rem;
  background: var(--warn-soft);
  border: 1px solid var(--warn);
  color: var(--ink);
}

.tool__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 1.1rem;
  border-radius: 8px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 650;
  text-decoration: none;
  cursor: pointer;
}

.btn--ghost {
  background: transparent;
  color: var(--accent);
}

.ladder {
  list-style: none;
  margin: 0.75rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.4rem;
}

.ladder li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.55rem 0.8rem;
}

.ladder__loft {
  font-weight: 750;
  font-size: 1.1rem;
  min-width: 3.2rem;
}

.ladder__label {
  color: var(--ink-2);
  font-size: 0.92rem;
}

.ladder__gap {
  margin-left: auto;
  font-size: 0.82rem;
  color: var(--ink-3);
}

.source-note {
  font-size: 0.8rem;
  color: var(--ink-3);
  margin-top: 0.6rem;
}

.source-note--unverified {
  color: var(--warn);
}

/* ------------------------------- footer ---------------------------------- */

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--surface);
  padding-block: 2rem 2.5rem;
  margin-top: 3rem;
  font-size: 0.9rem;
  color: var(--ink-2);
}

.site-footer__brand {
  font-weight: 750;
  color: var(--ink);
  letter-spacing: -0.02em;
}

.site-footer__blurb {
  max-width: 60ch;
  margin-top: 0.4rem;
}

.site-footer__nav ul {
  list-style: none;
  margin: 1.1rem 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.1rem;
}

.site-footer__nav a {
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  color: var(--ink-2);
}

.site-footer__legal {
  margin-top: 0.9rem;
  padding-top: 0.9rem;
  border-top: 1px solid var(--line);
  font-size: 0.82rem;
  color: var(--ink-3);
  max-width: 72ch;
}

/* ------------------------------ utilities -------------------------------- */

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.stack > * + * {
  margin-top: var(--stack);
}

.lede {
  font-size: 1.08rem;
  color: var(--ink-2);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

@media print {
  .site-header,
  .site-footer,
  .tool__actions,
  .toc {
    display: none;
  }
  .tool,
  .spec,
  .ladder li {
    border-color: #999;
  }
}