/* ==========================================================================
   TECHIE ZEST — insights.css
   Scoped styles for the Insights hub: the editorial index and the long-form
   article template (Quick Answer, TOC, question sections, frameworks,
   comparison tables, takeaways, related, contextual CTA).
   No token or global changes — everything here is namespaced under .ins-* /
   .article-* so it can be lifted into a WordPress theme untouched.
   Brand only: navy / emerald / gold / white.
   ========================================================================== */

/* ======================================================================
   INDEX — filter bar
   Reuses main.js initFilter via [data-filter-group]/[data-filter].
   ====================================================================== */
.ins-filterbar { margin: var(--space-xl) 0 var(--space-lg); border-top: 1px solid var(--line); padding-top: var(--space-md); }
.ins-filter { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-3xs); margin: 0; }
.ins-filter__btn {
  display: inline-flex; align-items: center; gap: 0.45em;
  padding: 0.5em 0.95em; white-space: nowrap;
  font-size: var(--step--1); font-weight: var(--weight-semi);
  letter-spacing: var(--tracking-flat); color: var(--text-soft);
  background: transparent; border: 1px solid transparent; border-radius: var(--radius-pill);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.ins-filter__btn .count { font-family: var(--font-mono); font-size: 0.76rem; color: var(--text-faint); transition: color var(--dur) var(--ease); }
.ins-filter__btn:hover { color: var(--navy-ink); background: color-mix(in srgb, var(--navy) 6%, transparent); }
.ins-filter__btn[aria-pressed="true"] { color: var(--white); background: var(--emerald); border-color: var(--emerald); }
.ins-filter__btn[aria-pressed="true"] .count { color: color-mix(in srgb, var(--white) 78%, transparent); }
.ins-filter__btn:focus-visible { outline: 2px solid var(--focus-ring); outline-offset: 3px; }

/* ======================================================================
   INDEX — featured article
   ====================================================================== */
.ins-featured {
  position: relative;
  display: grid; grid-template-columns: 1.08fr 1fr;
  gap: clamp(1.5rem, 4vw, 3.25rem); align-items: center;
  padding: clamp(1.25rem, 2.5vw, 2rem);
  border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--white);
  transition: box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.ins-featured:hover { box-shadow: var(--shadow-md); border-color: var(--line-strong); }
.ins-featured__media { border-radius: var(--radius); overflow: hidden; background: var(--navy-ink); aspect-ratio: 16 / 10; }
.ins-featured__media svg { width: 100%; height: 100%; display: block; }
.ins-featured__label { font-family: var(--font-mono); font-size: var(--step--1); letter-spacing: var(--tracking-wide); text-transform: uppercase; color: var(--gold); }
.ins-featured__cat { margin: var(--space-sm) 0 var(--space-xs); }
.ins-featured h2 { font-size: var(--step-3); line-height: var(--leading-snug); letter-spacing: var(--tracking-tight); color: var(--navy-ink); text-wrap: balance; }
.ins-featured__excerpt { margin-top: var(--space-md); max-width: 52ch; color: var(--text-soft); font-size: var(--step-0); line-height: var(--leading-body); }
.ins-featured__meta { margin-top: var(--space-md); display: flex; flex-wrap: wrap; gap: var(--space-sm); font-family: var(--font-mono); font-size: var(--step--1); color: var(--text-faint); }
.ins-featured__meta span + span::before { content: "·"; margin-right: var(--space-sm); color: var(--gold); }
.ins-featured__more { display: inline-flex; align-items: center; gap: 0.5em; margin-top: var(--space-lg); font-weight: var(--weight-semi); color: var(--emerald-deep); }
.ins-featured__title-link { color: inherit; }
.ins-featured__title-link::after { content: ""; position: absolute; inset: 0; border-radius: var(--radius-lg); }
.ins-featured:hover h2 { color: var(--navy); }

/* ======================================================================
   INDEX — editorial list (NOT identical cards: hairline-separated rows)
   ====================================================================== */
.ins-list { list-style: none; margin: 0; padding: 0; }
.ins-row {
  position: relative;
  display: grid; grid-template-columns: 190px 1fr auto;
  gap: clamp(1rem, 3vw, 2.25rem); align-items: center;
  padding: var(--space-lg) 0; border-top: 1px solid var(--line);
}
.ins-row:last-child { border-bottom: 1px solid var(--line); }
.ins-row__media { border-radius: var(--radius); overflow: hidden; background: var(--navy-ink); aspect-ratio: 4 / 3; }
.ins-row__media svg { width: 100%; height: 100%; display: block; }
.ins-featured__media img,
.ins-row__media img { width: 100%; height: 100%; display: block; object-fit: cover; }
.ins-row__cat { font-family: var(--font-mono); font-size: var(--step--1); letter-spacing: var(--tracking-wide); text-transform: uppercase; color: var(--emerald-deep); }
.ins-row h3 { margin: var(--space-2xs) 0 var(--space-2xs); font-size: var(--step-2); line-height: var(--leading-snug); letter-spacing: var(--tracking-flat); color: var(--navy-ink); }
.ins-row__excerpt { max-width: 58ch; color: var(--text-soft); font-size: var(--step-0); line-height: 1.55; }
.ins-row__meta { align-self: start; text-align: right; font-family: var(--font-mono); font-size: var(--step--1); color: var(--text-faint); white-space: nowrap; }
.ins-row__link { color: inherit; }
.ins-row__link::after { content: ""; position: absolute; inset: 0; }
.ins-row:hover h3 { color: var(--emerald-deep); }
.ins-row__arrow { display: inline-flex; align-items: center; gap: 0.4em; margin-top: var(--space-sm); font-weight: var(--weight-semi); color: var(--emerald-deep); }
.ins-empty { padding: var(--space-2xl) 0; color: var(--text-soft); }

@media (max-width: 900px) {
  .ins-featured { grid-template-columns: 1fr; }
  .ins-featured__media { order: -1; }
  .ins-row { grid-template-columns: 150px 1fr; }
  .ins-row__meta { grid-column: 2; text-align: left; margin-top: var(--space-2xs); }
}
@media (max-width: 560px) {
  .ins-row { grid-template-columns: 1fr; gap: var(--space-md); }
  .ins-row__media { max-width: 100%; aspect-ratio: 16 / 9; order: -1; }
  .ins-row__meta { grid-column: auto; }
}

/* ======================================================================
   ARTICLE — hero visual
   ====================================================================== */
.article-visual { border-radius: var(--radius-lg); overflow: hidden; background: var(--navy-ink); aspect-ratio: 16 / 8; margin-top: var(--space-lg); }
.article-visual svg { width: 100%; height: 100%; display: block; }
.article-visual img { width: 100%; height: 100%; display: block; object-fit: cover; }
.article-visual--photo { aspect-ratio: 16 / 9; }
.article-meta { display: flex; flex-wrap: wrap; gap: var(--space-sm); margin-top: var(--space-md); font-family: var(--font-mono); font-size: var(--step--1); color: var(--text-faint); }
.article-meta span + span::before { content: "·"; margin-right: var(--space-sm); color: var(--gold); }

/* ======================================================================
   ARTICLE — layout: content + sticky TOC
   ====================================================================== */
.article-shell { display: grid; grid-template-columns: minmax(0, 1fr) 15rem; gap: clamp(2rem, 5vw, 4.5rem); align-items: start; }
.article-body { min-width: 0; max-width: 72ch; }
.article-body > * + * { margin-top: var(--space-md); }
.article-body h2 { margin-top: var(--space-2xl); font-size: var(--step-2); line-height: var(--leading-snug); letter-spacing: var(--tracking-tight); color: var(--navy-ink); scroll-margin-top: calc(var(--header-h) + 1rem); }
.article-body h3 { margin-top: var(--space-xl); font-size: var(--step-1); color: var(--navy-ink); }
.article-body p { color: var(--text); font-size: var(--step-0); line-height: var(--leading-body); }
.article-body p.answer { color: var(--text); font-size: var(--step-1); line-height: 1.55; }
.article-body ul, .article-body ol { margin-left: 1.15em; color: var(--text); font-size: var(--step-0); line-height: var(--leading-body); }
.article-body li + li { margin-top: var(--space-2xs); }
.article-body strong { color: var(--navy-ink); font-weight: var(--weight-semi); }
.article-body a:not(.btn) { color: var(--emerald-deep); text-decoration: underline; text-underline-offset: 2px; text-decoration-color: color-mix(in srgb, var(--emerald) 40%, transparent); }
.article-body a:not(.btn):hover { text-decoration-color: var(--emerald); }

/* Table of contents — sticky on desktop */
.toc { position: sticky; top: calc(var(--header-h) + 1rem); align-self: start; }
.toc__label { font-family: var(--font-mono); font-size: var(--step--1); letter-spacing: var(--tracking-wide); text-transform: uppercase; color: var(--text-faint); margin-bottom: var(--space-sm); }
.toc ol { list-style: none; margin: 0; padding: 0; border-left: 2px solid var(--line); }
.toc li { margin: 0; }
.toc a { display: block; padding: 0.4em 0 0.4em var(--space-md); margin-left: -2px; border-left: 2px solid transparent; font-size: var(--step--1); line-height: 1.4; color: var(--text-soft); }
.toc a:hover { color: var(--navy-ink); }
.toc a.is-active { color: var(--emerald-deep); border-left-color: var(--emerald); font-weight: var(--weight-semi); }

/* ======================================================================
   ARTICLE — Quick Answer callout (GEO extractable)
   ====================================================================== */
.quick-answer { padding: var(--space-lg); border: 1px solid var(--line); border-left: 3px solid var(--emerald); border-radius: var(--radius); background: color-mix(in srgb, var(--emerald) 4%, var(--white)); }
.quick-answer__label { display: inline-flex; align-items: center; gap: 0.5em; font-family: var(--font-mono); font-size: var(--step--1); letter-spacing: var(--tracking-wide); text-transform: uppercase; color: var(--emerald-deep); margin-bottom: var(--space-sm); }
.quick-answer p { font-size: var(--step-1); line-height: 1.55; color: var(--navy-ink); max-width: 64ch; }
.quick-answer p + p { margin-top: var(--space-sm); }

/* ======================================================================
   ARTICLE — comparison table
   ====================================================================== */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; border: 1px solid var(--line); border-radius: var(--radius); }
.compare-table { width: 100%; border-collapse: collapse; min-width: 34rem; font-size: var(--step--1); }
.compare-table caption { text-align: left; padding: var(--space-sm) var(--space-md); font-family: var(--font-mono); font-size: var(--step--1); color: var(--text-faint); }
.compare-table th, .compare-table td { text-align: left; padding: var(--space-sm) var(--space-md); border-bottom: 1px solid var(--line); vertical-align: top; }
.compare-table thead th { background: color-mix(in srgb, var(--navy) 5%, var(--white)); color: var(--navy-ink); font-weight: var(--weight-semi); border-bottom: 1px solid var(--line-strong); }
.compare-table tbody tr:last-child td { border-bottom: none; }
.compare-table td:first-child, .compare-table th:first-child { font-weight: var(--weight-semi); color: var(--navy-ink); }

/* ======================================================================
   ARTICLE — decision framework (two columns)
   ====================================================================== */
.decision { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-lg); }
.decision__col { padding: var(--space-lg); border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); }
.decision__col--build { border-top: 3px solid var(--emerald); }
.decision__col--buy { border-top: 3px solid var(--navy); }
.decision__head { font-family: var(--font-mono); font-size: var(--step--1); letter-spacing: var(--tracking-wide); text-transform: uppercase; margin-bottom: var(--space-md); }
.decision__col--build .decision__head { color: var(--emerald-deep); }
.decision__col--buy .decision__head { color: var(--navy); }
.decision__col ul { list-style: none; margin: 0; padding: 0; }
.decision__col li { position: relative; padding-left: 1.5em; margin-top: var(--space-sm); font-size: var(--step--1); line-height: 1.5; color: var(--text); }
.decision__col li::before { content: ""; position: absolute; left: 0; top: 0.5em; width: 8px; height: 8px; border-radius: 2px; }
.decision__col--build li::before { background: var(--emerald); }
.decision__col--buy li::before { background: var(--navy); }

/* ======================================================================
   ARTICLE — checklist / key takeaways
   ====================================================================== */
.checklist { list-style: none; margin: 0; padding: 0; }
.checklist li { position: relative; padding-left: 2em; margin-top: var(--space-sm); font-size: var(--step-0); line-height: 1.5; color: var(--text); }
.checklist li::before {
  content: ""; position: absolute; left: 0; top: 0.15em; width: 1.25em; height: 1.25em; border-radius: 50%;
  background: color-mix(in srgb, var(--emerald) 14%, transparent);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='%23109F66' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M3.5 8.5l3 3 6-7'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: center; background-size: 0.8em;
}
.takeaways { padding: var(--space-lg) var(--space-xl); border-radius: var(--radius-lg); background: color-mix(in srgb, var(--navy) 4%, var(--white)); border: 1px solid var(--line); }
.takeaways h2 { margin-top: 0 !important; font-size: var(--step-1); }

/* ======================================================================
   ARTICLE — related links + contextual CTA
   ====================================================================== */
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--gutter); list-style: none; margin: 0; padding: 0; }
.related-card { position: relative; padding: var(--space-lg); border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); transition: box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease); }
.related-card:hover { box-shadow: var(--shadow-sm); border-color: var(--line-strong); }
.related-card__kind { font-family: var(--font-mono); font-size: var(--step--1); letter-spacing: var(--tracking-wide); text-transform: uppercase; color: var(--gold); }
.related-card h3 { margin: var(--space-sm) 0 0; font-size: var(--step-1); color: var(--navy-ink); }
.related-card a::after { content: ""; position: absolute; inset: 0; border-radius: var(--radius); }
.related-card:hover h3 { color: var(--emerald-deep); }

.article-cta { display: grid; gap: var(--space-md); padding: clamp(1.5rem, 4vw, 2.75rem); border-radius: var(--radius-lg); background: var(--navy-deep); color: var(--text-invert); text-align: center; justify-items: center; }
.article-cta h2 { margin: 0 !important; color: var(--text-invert); font-size: var(--step-2); max-width: 22ch; }
.article-cta p { color: var(--text-invert-soft); max-width: 52ch; }

@media (max-width: 1024px) {
  .article-shell { grid-template-columns: 1fr; }
  .toc { position: static; order: -1; padding: var(--space-md) var(--space-lg); border: 1px solid var(--line); border-radius: var(--radius); background: color-mix(in srgb, var(--navy) 3%, var(--white)); }
  .toc ol { display: grid; grid-template-columns: 1fr 1fr; gap: 0 var(--space-lg); border-left: none; }
  .toc a { border-left: none; padding-left: 0; }
  .toc a.is-active { border-left: none; padding-left: 0; }
  .article-body { max-width: none; }
}
@media (max-width: 760px) {
  .decision { grid-template-columns: 1fr; }
  .related-grid { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .toc ol { grid-template-columns: 1fr; }
}