/* ==========================================================================
   Knowledge Hub — 2026 Waucht restyle  ·  assets/css/knowledge-2026.css

   Loaded AFTER assets/css/knowledge.css on every /knowledge/* page, on top of
   the shared 2026 shell (includes/os2026.php: Tomorrow, cream ground, navy
   ink, the one orange #ff7529, octagon plates).

   WHY A SECOND SHEET AND NOT A REWRITE: seventeen articles plus the autopub
   publisher (bos-modules mod_aeo_engine publish_loop.py) all emit the same
   class vocabulary — article-header, article-body, article-sidebar, tldr-box,
   faq-accordion, article-card … knowledge.css still owns their LAYOUT. This
   sheet owns their SURFACE: colour, type, radius, elevation. global.css is no
   longer loaded on these pages, so §1 re-declares every legacy token that
   knowledge.css consumes — an undefined var() DELETES the declaration.
   ========================================================================== */

/* ---------- 1. legacy token bridge (values are brand tokens) ---------- */
:root{
  --color-primary:var(--orange);
  --color-primary-dark:var(--orange-deep);
  --color-secondary:var(--grey-ink);
  --color-text:var(--navy);
  --color-text-light:var(--grey-ink);
  --color-text-gray:var(--grey-ink);
  --color-white:var(--white);
  --color-bg-light:var(--cream-soft);
  --color-bg-dark:var(--navy-deep);
  --color-border:rgba(50,54,81,.16);
  --font-primary:'Tomorrow',system-ui,sans-serif;
  --font-secondary:'Tomorrow',system-ui,sans-serif;
  --font-size-base:16px;--font-size-lg:18px;--font-size-xl:20px;--font-size-2xl:24px;
  --font-size-3xl:32px;--font-size-4xl:40px;--font-size-5xl:50px;
  --spacing-xs:8px;--spacing-sm:16px;--spacing-md:24px;--spacing-lg:48px;
  --spacing-xl:64px;--spacing-2xl:80px;--spacing-3xl:120px;
  --radius-sm:0;--radius-md:0;--radius-lg:0;--radius-full:9999px;
  --shadow-sm:0 1px 0 rgba(50,54,81,.08);
  --shadow-md:0 14px 34px -18px rgba(50,54,81,.35);
  --shadow-lg:0 22px 48px -20px rgba(50,54,81,.45);
  --transition-speed:.25s;--transition-timing:var(--ease);
  /* the octagon cut every plate on the 2026 shell carries */
  --kcut:18px;
}

/* ---------- 2. base type the shell reset removed ---------- */
.knowledge .container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 clamp(22px,6vw,88px)}
/* NO blanket `.knowledge a` colour: at (0,1,1) it out-ranks .nav__cta and every
   single-class link in the shell and painted the nav CTA orange-on-orange. Links
   inherit (shell default); the article body sets its own below. */
.knowledge h1,.knowledge h2,.knowledge h3,.knowledge h4{font-family:inherit;color:var(--navy);line-height:1.15}
.knowledge p{line-height:1.6}

/* buttons: legacy class names, shell look */
.knowledge .btn{display:inline-flex;align-items:center;justify-content:center;gap:11px;font-weight:700;font-size:15px;
  padding:15px 26px;border:0;border-radius:0;text-decoration:none;cursor:pointer;line-height:1;
  clip-path:polygon(14px 0,100% 0,100% calc(100% - 14px),calc(100% - 14px) 100%,0 100%,0 14px);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),color .3s var(--ease)}
.knowledge .btn:hover{transform:translateY(-1px)}
.knowledge .btn--primary{background:var(--orange);color:var(--navy-deep)}
.knowledge .btn--primary:hover{background:var(--orange);color:var(--navy-deep)}
.knowledge .btn--secondary{background:transparent;color:var(--navy);box-shadow:inset 0 0 0 1.5px rgba(50,54,81,.3)}
.knowledge .btn--secondary:hover{background:transparent;color:var(--orange);box-shadow:inset 0 0 0 1.5px var(--orange)}
.knowledge .btn--large{padding:18px 32px;font-size:16px}
.knowledge .bg-navy .btn--secondary,.knowledge .on-dark .btn--secondary{color:#fff;box-shadow:inset 0 0 0 1.5px rgba(255,255,255,.45)}

/* ---------- 3. HUB ---------- */
/* hero: the product-page cream gradient, sat below the fixed bar */
.knowledge-hero{
  background:linear-gradient(168deg,var(--cream) 0%,#e6e4da 52%,#f3f2ec 100%);
  color:var(--navy);text-align:left;
  padding:calc(var(--navh) + clamp(56px,8vw,104px)) 0 clamp(48px,6vw,80px);
  overflow:hidden;overflow:clip}
.knowledge-hero::before{
  top:-40%;right:-8%;width:56%;height:150%;opacity:1;
  background:radial-gradient(circle at 42% 40%,rgba(255,117,41,.2),rgba(255,117,41,0) 62%)}
.knowledge-hero__content{max-width:820px;margin:0}
.knowledge-hero__label{font-weight:700;text-transform:uppercase;letter-spacing:.32em;font-size:12px;
  color:var(--navy);background:none;padding:0;border:0;border-radius:0;margin-bottom:16px;display:block}
.knowledge-hero__title{font-weight:300;font-size:clamp(34px,5.4vw,68px);line-height:1.03;letter-spacing:-.02em;color:var(--navy);margin:0}
.knowledge-hero__title b{font-weight:700}
.knowledge-hero__subtitle{margin:20px 0 0;font-weight:300;font-size:clamp(16.5px,1.7vw,20px);line-height:1.55;color:var(--grey-ink);max-width:62ch;opacity:1}

/* search: a white plate with the octagon cut */
.knowledge-search{margin:clamp(26px,3.2vw,38px) 0 0;max-width:520px;position:relative}
.knowledge-search__icon{position:absolute;left:18px;top:50%;transform:translateY(-50%);width:18px;height:18px;color:var(--grey-ink)}
.knowledge-search__input{width:100%;padding:16px 18px 16px 50px;font:inherit;font-size:16px;color:var(--navy);
  background:var(--white);border:0;border-radius:0;box-shadow:inset 0 0 0 1.5px rgba(50,54,81,.2);
  clip-path:polygon(14px 0,100% 0,100% calc(100% - 14px),calc(100% - 14px) 100%,0 100%,0 14px);
  transition:box-shadow .3s var(--ease)}
.knowledge-search__input::placeholder{color:var(--grey)}
.knowledge-search__input:focus{outline:0;box-shadow:inset 0 0 0 1.5px var(--orange)}
.knowledge-search__input:focus-visible{outline:0}

/* filters */
.knowledge-filters{background:var(--cream-soft);border:0;padding:clamp(22px,3vw,34px) 0 0;position:static}
.filter-tabs{display:flex;flex-wrap:wrap;gap:10px;justify-content:flex-start;overflow:visible}
.filter-tab{font:inherit;font-weight:700;font-size:13px;letter-spacing:.02em;padding:10px 16px;
  background:transparent;color:var(--navy);border:0;border-radius:0;cursor:pointer;
  box-shadow:inset 0 0 0 1.5px rgba(50,54,81,.25);
  clip-path:polygon(10px 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%,0 10px);
  transition:color .25s var(--ease),box-shadow .25s var(--ease),background .25s var(--ease)}
.filter-tab:hover{color:var(--orange);box-shadow:inset 0 0 0 1.5px var(--orange);background:transparent;border-color:transparent}
.filter-tab.active{background:var(--navy);color:#fff;box-shadow:none;border-color:transparent}

/* grid + cards: white plates with a navy hairline rim, cut corner, orange on hover */
.knowledge-articles{background:var(--cream-soft);padding:clamp(34px,4.4vw,58px) 0 clamp(72px,10vw,132px)}
.articles-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:clamp(16px,2vw,24px)}
.article-card{position:relative;background:rgba(50,54,81,.2);padding:1.5px;border-radius:0;box-shadow:none;overflow:visible;
  clip-path:polygon(var(--kcut) 0,100% 0,100% calc(100% - var(--kcut)),calc(100% - var(--kcut)) 100%,0 100%,0 var(--kcut));
  transition:background .3s var(--ease),transform .3s var(--ease)}
.article-card:hover{background:rgba(255,117,41,.55);transform:translateY(-2px);box-shadow:none}
.article-card__link{display:block;height:100%;background:var(--white);
  clip-path:polygon(calc(var(--kcut) - 1px) 0,100% 0,100% calc(100% - var(--kcut) + 1px),calc(100% - var(--kcut) + 1px) 100%,0 100%,0 calc(var(--kcut) - 1px))}
.article-card--featured .article-card__link{background:var(--white)}
.article-card__content{padding:clamp(22px,2.4vw,30px) clamp(22px,2.4vw,30px) 22px;display:flex;flex-direction:column;height:100%}
.article-card__title{font-size:clamp(18px,1.5vw,20px);font-weight:700;letter-spacing:-.01em;line-height:1.25;color:var(--navy);margin:0 0 12px}
.article-card:hover .article-card__title{color:var(--navy)}
.article-card__excerpt{font-size:14.5px;line-height:1.6;color:var(--grey-ink);margin:0 0 22px;font-weight:300}
.article-card__meta{margin-top:auto;font-size:12.5px;color:var(--grey-ink);letter-spacing:.02em;padding-top:14px;border-top:1px solid rgba(50,54,81,.12)}
.article-author{font-weight:700;color:var(--navy)}
.article-card__image,.featured-article__image{clip-path:none}

/* category chip: one ink, one rim. The category is a NOUN, not a colour system —
   four pastel badges was the 2025 sheet inventing a palette the brand never had. */
.article-category{display:inline-block;font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.18em;
  padding:6px 10px 5px;border-radius:0;margin-bottom:16px;color:var(--navy);background:transparent;
  box-shadow:inset 0 0 0 1px rgba(50,54,81,.3)}
.article-category--aeo{color:var(--orange-deep);box-shadow:inset 0 0 0 1px rgba(255,117,41,.6);background:transparent}
.article-category--crm,.article-category--email,.article-category--growth{color:var(--navy);background:transparent;box-shadow:inset 0 0 0 1px rgba(50,54,81,.3)}

.articles-no-results{text-align:center;color:var(--grey-ink);padding:clamp(40px,6vw,72px) 0;font-size:17px}

/* closing band: navy, like every closing band on the shell */
.knowledge-cta{background:var(--navy);color:#fff;padding:clamp(72px,10vw,132px) 0;text-align:left;position:relative;overflow:hidden;overflow:clip}
.knowledge-cta::before,.knowledge-cta::after{display:none}
.knowledge-cta__content{max-width:720px;margin:0;position:relative;z-index:1}
.knowledge-cta h2{font-weight:300;font-size:clamp(28px,4.4vw,56px);line-height:1.04;letter-spacing:-.015em;color:#fff;margin:0 0 18px}
.knowledge-cta h2 b{font-weight:700}
.knowledge-cta p{font-weight:300;font-size:clamp(17px,1.75vw,21px);line-height:1.5;color:#dfe2ee;margin:0 0 clamp(26px,3.2vw,38px);max-width:60ch;opacity:1}
.knowledge-cta .btn--primary{background:var(--orange);color:var(--navy-deep)}

/* ---------- 4. ARTICLE ---------- */
.article-breadcrumbs{background:var(--cream);border:0;padding:calc(var(--navh) + 22px) 0 0}
.breadcrumbs{font-size:13px;color:var(--grey-ink);letter-spacing:.02em}
.breadcrumbs a{color:var(--grey-ink)}
.breadcrumbs a:hover{color:var(--orange)}
.breadcrumbs__separator{color:rgba(50,54,81,.35)}
.breadcrumbs__current{color:var(--navy);font-weight:700;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:60vw}

.article-header{background:linear-gradient(168deg,var(--cream) 0%,#e6e4da 52%,#f3f2ec 100%);
  padding:clamp(34px,4.4vw,58px) 0 clamp(44px,5vw,72px);position:relative;overflow:hidden;overflow:clip}
.article-header::before{display:none}
.article-header__content{max-width:900px;margin:0;text-align:left}
.article-header__title{font-weight:300;font-size:clamp(30px,4.4vw,56px);line-height:1.06;letter-spacing:-.02em;color:var(--navy);margin:0 0 18px}
.article-header__title b,.article-header__title strong{font-weight:700}
.article-header__excerpt{font-weight:300;font-size:clamp(16.5px,1.7vw,20px);line-height:1.55;color:var(--grey-ink);max-width:62ch;margin:0 0 26px}
.article-header__meta{justify-content:flex-start;border-top:1px solid rgba(50,54,81,.2);padding-top:18px;gap:26px}
.article-meta__avatar{border:2px solid var(--white);box-shadow:0 0 0 1.5px rgba(50,54,81,.2)}
.article-meta__author-name{color:var(--navy);font-weight:700}
.article-meta__author-title,.article-meta__details{color:var(--grey-ink)}
.article-meta__date svg,.article-meta__read-time svg{opacity:1;color:var(--orange)}

.article-content{background:var(--cream-soft);padding:clamp(48px,6vw,80px) 0 clamp(72px,10vw,132px)}
.article-body{font-size:17px;line-height:1.7;color:var(--navy);font-weight:300}
.article-body p{margin-bottom:16px}
.article-body b,.article-body strong{font-weight:700;color:var(--navy)}
.article-body h2{font-size:clamp(24px,2.4vw,32px);font-weight:700;letter-spacing:-.015em;line-height:1.15;color:var(--navy);margin:40px 0 14px;padding-bottom:12px}
.article-body h2::after{width:74px;height:2px;background:var(--orange);border-radius:0}
.article-body section:first-of-type h2,.article-body > h2:first-child{margin-top:0}
.article-body h3{font-size:clamp(19px,1.8vw,22px);font-weight:700;color:var(--navy);margin:28px 0 10px}
.article-body h4{font-size:17px;font-weight:700;color:var(--navy)}
.article-body ul,.article-body ol{margin-bottom:18px}
.article-body li{margin-bottom:6px}
.article-body li::marker{color:var(--orange)}
.article-body a{color:var(--orange-deep);text-decoration:underline;text-decoration-color:rgba(255,117,41,.4);text-underline-offset:3px}
.article-body a:hover{color:var(--orange);text-decoration-color:var(--orange)}
.article-body img{clip-path:polygon(var(--kcut) 0,100% 0,100% calc(100% - var(--kcut)),calc(100% - var(--kcut)) 100%,0 100%,0 var(--kcut))}
.article-body blockquote{background:var(--white);border-left:3px solid var(--orange);border-radius:0}
.article-body blockquote p{color:var(--navy);font-style:normal;font-weight:300}
.article-body table{width:100%;border-collapse:collapse;margin:22px 0;font-size:15px;background:var(--white)}
.article-body th,.article-body td{border:1px solid rgba(50,54,81,.16);padding:10px 12px;text-align:left;vertical-align:top}
.article-body th{background:var(--navy);color:#fff;font-weight:700;letter-spacing:.02em}
.article-body code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.92em;background:var(--white);padding:2px 6px;box-shadow:inset 0 0 0 1px rgba(50,54,81,.14)}
.article-updated{color:var(--grey-ink);font-size:13px;letter-spacing:.02em}
.section-divider{border:0;height:1px;background:rgba(50,54,81,.16)}

/* plates inside the body: tldr, takeaway, cta, author, faq — all the same white
   octagon plate with a navy hairline; orange only as a rule or a link. */
.tldr-box,.key-takeaway,.key-takeaway-box,.article-cta-box,.author-box,.article-faq,.faq-item,.comparison-table,.toc{border-radius:0}
.tldr-box{background:var(--white);border-left:3px solid var(--orange);padding:22px 26px;margin-bottom:30px;
  box-shadow:inset 0 0 0 1px rgba(50,54,81,.12);border-radius:0}
.tldr-box p{font-size:16.5px;line-height:1.6;color:var(--navy);font-weight:300}
.tldr-box strong{font-weight:700}
.key-takeaway,.key-takeaway-box{background:var(--white);border:0;border-left:3px solid var(--orange);box-shadow:inset 0 0 0 1px rgba(50,54,81,.12);color:var(--navy)}
.key-takeaway h4,.key-takeaway-box h4,.key-takeaway__title{color:var(--navy)}

.article-cta-box{background:var(--navy);color:#fff;border:0;border-radius:0;padding:clamp(28px,3.4vw,44px);margin:40px 0 24px;text-align:left;
  clip-path:polygon(var(--kcut) 0,100% 0,100% calc(100% - var(--kcut)),calc(100% - var(--kcut)) 100%,0 100%,0 var(--kcut))}
.article-cta-box::before,.article-cta-box::after{display:none}
.article-cta-box h3{color:#fff;font-weight:700;font-size:clamp(22px,2.2vw,28px);letter-spacing:-.01em;margin:0 0 10px}
.article-cta-box p{color:#dfe2ee;font-weight:300;margin:0 0 22px;font-size:16.5px}
.article-cta-box .btn{margin:0 12px 10px 0}
.article-cta-box .btn--secondary{color:#fff;box-shadow:inset 0 0 0 1.5px rgba(255,255,255,.45)}
.article-cta-box .btn--secondary:hover{color:var(--orange);box-shadow:inset 0 0 0 1.5px var(--orange)}

.author-box{background:var(--white);border:0;box-shadow:inset 0 0 0 1px rgba(50,54,81,.14);border-radius:0}
.author-box__name,.author-box h3,.author-box h4{color:var(--navy)}
.author-box p{color:var(--grey-ink)}

/* FAQ — both idioms the corpus carries: button-accordion and <details> */
.faq-accordion__item{background:var(--white);border:0;box-shadow:inset 0 0 0 1px rgba(50,54,81,.14);border-radius:0;margin-bottom:8px}
.faq-accordion__item:hover{border-color:transparent;box-shadow:inset 0 0 0 1px rgba(255,117,41,.5)}
.faq-accordion__item.active{border-color:transparent;box-shadow:inset 0 0 0 1.5px var(--orange)}
.faq-accordion__trigger{font-family:inherit;padding:16px 18px}
.faq-accordion__trigger:hover{background:transparent}
.faq-accordion__question{color:var(--navy);font-weight:700;font-size:15.5px}
.faq-accordion__icon{color:var(--orange)}
.faq-accordion__content{padding:0 18px 16px;color:var(--navy);font-weight:300}
.article-faq{margin:28px 0}
.faq-item{background:var(--white);box-shadow:inset 0 0 0 1px rgba(50,54,81,.14);margin-bottom:8px;padding:0 18px}
.faq-item[open]{box-shadow:inset 0 0 0 1.5px var(--orange)}
.faq-item summary{cursor:pointer;list-style:none;font-weight:700;color:var(--navy);padding:16px 26px 16px 0;position:relative;font-size:15.5px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"";position:absolute;right:4px;top:50%;width:9px;height:9px;border-right:2px solid var(--orange);border-bottom:2px solid var(--orange);transform:translateY(-70%) rotate(45deg);transition:transform .25s var(--ease)}
.faq-item[open] summary::after{transform:translateY(-30%) rotate(225deg)}
.faq-item p{padding:0 0 16px;margin:0;font-weight:300}

/* build-item ticks */
.build-item__check{color:var(--orange)}

/* sidebar: one white plate, sticky, quiet */
.article-sidebar__toc{background:var(--white);border:0;box-shadow:inset 0 0 0 1px rgba(50,54,81,.14);border-radius:0;padding:22px}
.article-sidebar__title,.sidebar-related__title,.sidebar-keywords__title,.toc-nav__title{font-weight:700;text-transform:uppercase;letter-spacing:.24em;font-size:11px;color:var(--navy)}
.article-sidebar__link,.toc-nav__link{color:var(--grey-ink);font-size:14px;font-weight:300;border-radius:0}
.article-sidebar__link:hover,.toc-nav__link:hover,.article-sidebar__link.active,.toc-nav__link.active{color:var(--navy);background:transparent;border-color:var(--orange)}
.sidebar-related,.sidebar-keywords{border-top:1px solid rgba(50,54,81,.14)}
.sidebar-related__item{border-radius:0}
.sidebar-related__item:hover{background:var(--cream-soft)}
.sidebar-related__item-title{color:var(--navy);font-weight:700;font-size:14px;line-height:1.35;margin:0 0 3px}
.sidebar-related__item-meta{color:var(--grey-ink);font-size:12px}
.sidebar-keywords__tag{background:transparent;color:var(--grey-ink);border-radius:0;box-shadow:inset 0 0 0 1px rgba(50,54,81,.2);font-size:12px;padding:5px 10px}
.sidebar-keywords__tag:hover{background:transparent;color:var(--orange);box-shadow:inset 0 0 0 1px var(--orange)}

/* related articles grid at the foot of an article reuses the hub card */
.related-articles{background:var(--cream-soft)}
.related-articles h2,.related-articles__title{color:var(--navy)}

/* ---------- 5. mobile ---------- */
@media (max-width:760px){
  .knowledge-hero{padding-top:calc(var(--navh) + 40px)}
  .knowledge-hero__content,.article-header__content{text-align:left}
  .filter-tabs{gap:8px}
  .filter-tab{padding:9px 13px;font-size:12.5px}
  .article-body{font-size:16px}
  .breadcrumbs__current{max-width:52vw}
  .article-cta-box .btn{width:100%;margin-right:0}
}