/* Arrow Valves Knowledge Hub — Figma tokens */
:root {
  --av-green-700: #07844a;
  --av-green-600: #0da85d;
  --av-green-500: #19b76a;
  --av-navy-800: #06233d;
  --av-navy-700: #08345a;
  --av-navy-panel: #07243f;
  --av-text: #07365f;
  --av-text-2: #5f6f84;
  --av-muted: #8b98aa;
  --av-inverse: #ffffff;
  --av-inverse-muted: #b8c7d9;
  --av-border: #d8e1ea;
  --av-border-strong: #b7c5d4;
  --av-white: #ffffff;
  --av-soft: #eef4f8;
  --av-page: #f4f7fa;
  --av-mint: #e8f8f0;
  --av-warn: #fef4d6;
  --av-radius: 16px;
  --av-radius-sm: 12px;
  --av-wrap: 1240px;
  --av-gutter: 24px;
  --av-font: "Neue Haas Grotesk Display Pro", "Helvetica Neue", Inter, system-ui, sans-serif;
  --av-shadow: 0 8px 24px rgba(7, 54, 95, 0.06);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body.avkh {
  margin: 0;
  font-family: var(--av-font);
  color: var(--av-text);
  background: var(--av-page);
  font-size: 16px;
  line-height: 26px;
  font-weight: 500;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--av-green-600); text-decoration: none; }
button, [role="button"] { cursor: pointer; }
.screen-reader-text, .avkh-skip {
  position: absolute; left: -9999px;
}
.avkh-skip:focus { left: 16px; top: 16px; z-index: 99; background: #fff; padding: 8px 12px; }

.avkh-wrap { width: min(var(--av-wrap), calc(100% - var(--av-gutter) * 2)); margin-inline: auto; }
.avkh-eyebrow {
  margin: 0 0 8px;
  font-size: 12px; line-height: 16px; font-weight: 700;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--av-muted);
}
.avkh-eyebrow--green { color: var(--av-green-500); }
.avkh-lede { font-size: 19px; line-height: 30px; color: var(--av-text-2); max-width: 720px; }
.avkh-lede--inverse { color: var(--av-inverse-muted); }
h1, h2, h3, .avkh-h2 { font-weight: 700; letter-spacing: -0.03em; color: var(--av-text); margin: 0 0 12px; }
h1 { font-size: clamp(36px, 5vw, 64px); line-height: 1.1; }
h2, .avkh-h2 { font-size: clamp(28px, 3vw, 40px); line-height: 1.2; }
h3 { font-size: 17px; line-height: 24px; font-weight: 600; letter-spacing: 0; }

.avkh-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 44px; padding: 10px 20px; border-radius: 999px;
  font-size: 15px; font-weight: 600; line-height: 20px; border: 1px solid transparent;
}
.avkh-btn--primary { background: var(--av-green-500); color: #fff; }
.avkh-btn--primary:hover { background: var(--av-green-600); color: #fff; }
.avkh-btn--ghost { background: transparent; color: var(--av-text); border-color: var(--av-border-strong); }
.avkh-btn--ghost-light { background: transparent; color: #fff; border-color: rgba(255,255,255,.35); }
.avkh-btn--block { width: 100%; }
.avkh-text-link { color: var(--av-green-600); font-size: 14px; font-weight: 600; }
.avkh-text-link::after { content: " →"; }
.avkh-text-link--light { color: #fff; }

/* Header */
.avkh-header {
  background: var(--av-navy-800);
  color: #fff;
  position: sticky; top: 0; z-index: 40;
}
.avkh-header__inner {
  width: min(1440px, 100%);
  margin: 0 auto;
  padding: 10px 100px;
  display: flex; align-items: center; gap: 61px;
  min-height: 84px;
}
.avkh-header--el > .elementor-widget,
.avkh-header--el > .e-con { width: auto; }
.avkh-header--el .elementor-widget-nav-menu { flex: 1; }
.avkh-header--el .elementor-nav-menu { display: flex; gap: 30px; align-items: center; }
.avkh-header--el .elementor-nav-menu .elementor-item {
  color: var(--av-soft); font-size: 14px; font-weight: 600; line-height: 20px;
}
.avkh-header--el .elementor-nav-menu .elementor-item:hover,
.avkh-header--el .elementor-nav-menu .elementor-item.elementor-item-active { color: var(--av-green-500); }
.avkh-header--el .avkh-logo__hub { border-left: 1px solid var(--av-border-strong); padding-left: 11px; margin: 0; }
.avkh-logo { display: flex; align-items: center; gap: 0; color: #fff; font-weight: 700; flex-shrink: 0; }
.avkh-logo__img, .avkh-logo img { width: 57px; height: 26px; display: block; object-fit: contain; }
.avkh-logo--light .avkh-logo__img, .avkh-logo--light img { width: 72px; height: 33px; }
.avkh-logo__hub {
  border-left: 1px solid var(--av-border-strong);
  margin-left: 10px; padding-left: 11px;
  font-size: 11px; line-height: 18px; letter-spacing: 1.32px; text-transform: uppercase;
  color: var(--av-inverse-muted); font-weight: 700;
}
.avkh-nav { flex: 1; }
.avkh-nav__list {
  display: flex; gap: 30px; list-style: none; margin: 0; padding: 0;
  font-size: 14px; font-weight: 600; line-height: 20px;
}
.avkh-nav__list a { color: var(--av-soft); }
.avkh-nav__list a.is-active, .avkh-nav__list .current-menu-item a { color: var(--av-green-500); }
.avkh-search-btn {
  display: flex; align-items: center; gap: 8px;
  background: var(--av-navy-800); border: 1px solid var(--av-border-strong);
  color: var(--av-muted); border-radius: 20px; padding: 8px 13px; min-width: 260px; max-width: 329px; flex: 1 0 auto;
}
.avkh-search-btn .avkh-icon { width: 14px; height: 14px; }
.avkh-search-btn kbd {
  margin-left: auto; font-size: 10px; line-height: 16px;
  background: rgba(255,255,255,.1); border: 0;
  border-radius: 3px; padding: 3px 5px; color: var(--av-border-strong);
}
.avkh-burger { display: none; background: none; border: 0; width: 40px; height: 40px; }
.avkh-burger span { display: block; height: 2px; background: #fff; margin: 6px 8px; }

/* Hero */
.avkh-hero {
  background: var(--av-navy-800);
  color: #fff;
  position: relative;
  overflow: hidden;
}
.avkh-hero--home, .avkh-hero--el-home { padding: 164px 0 140px; }
.avkh-hero--el-home {
  background: #06233d url("../img/hero-home.png") center/cover no-repeat;
  text-align: center;
}
.avkh-why-image {
  min-height: 505px;
  border-radius: 20px;
  background: #eef4f8 url("../img/why-backflow.png") center/cover no-repeat;
}
.avkh-hero--page { padding: 56px 0 64px; background: var(--av-soft); color: var(--av-text); }
.avkh-hero--page h1, .avkh-hero--page .avkh-lede { color: inherit; }
.avkh-hero--guide { padding: 48px 0; background: var(--av-soft); color: var(--av-text); }
.avkh-hero--home::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}
.avkh-hero__inner { position: relative; max-width: 860px; }
.avkh-hero__actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0; }
.avkh-hero-search {
  display: flex; align-items: center; gap: 10px;
  background: #fff; border-radius: 999px; padding: 12px 18px; max-width: 720px;
}
.avkh-hero-search input { border: 0; flex: 1; font: inherit; outline: none; color: var(--av-text); }
.avkh-chips-label { font-size: 13px; color: var(--av-inverse-muted); margin: 18px 0 8px; }
.avkh-chips { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; margin: 0; padding: 0; }
.avkh-chips a, .avkh-chips--filter a {
  display: inline-flex; padding: 8px 14px; border-radius: 999px;
  background: rgba(255,255,255,.1); color: #fff; font-size: 13px; font-weight: 600;
  border: 1px solid rgba(255,255,255,.12);
}
.avkh-hero--page .avkh-chips a, .avkh-chips--filter a {
  background: #fff; color: var(--av-text); border-color: var(--av-border);
}
.avkh-chips a.is-active, .avkh-chips--filter a.is-active {
  background: var(--av-navy-800); color: #fff; border-color: var(--av-navy-800);
}
.avkh-hero__split { display: grid; grid-template-columns: 1.2fr .8fr; gap: 40px; align-items: center; }
.avkh-hero__image img { border-radius: var(--av-radius); width: 100%; height: 280px; object-fit: cover; }

/* Tiles */
.avkh-tiles-overlap { margin-top: -80px; position: relative; z-index: 2; }
.avkh-tiles, .avkh-grid {
  display: grid; gap: 20px;
}
.avkh-tiles { grid-template-columns: repeat(3, 1fr); }
.avkh-grid--guide, .avkh-grid--insight, .avkh-grid--product, .avkh-grid--glossary { grid-template-columns: repeat(3, 1fr); }
.avkh-grid--tool { grid-template-columns: repeat(3, 1fr); }
.avkh-tile {
  background: #fff; border-radius: var(--av-radius); padding: 22px;
  border: 1px solid var(--av-border); border-bottom: 3px solid var(--av-green-500);
  color: var(--av-text); min-height: 140px;
  display: flex; flex-direction: column; gap: 8px;
  box-shadow: var(--av-shadow);
}
.avkh-tile strong { font-size: 17px; }
.avkh-tile span:last-child { color: var(--av-text-2); font-size: 14px; }
.avkh-tile__icon {
  width: 40px; height: 40px; border-radius: 10px;
  background: var(--av-mint); color: var(--av-green-600);
  display: grid; place-items: center;
}
.avkh-tile__icon svg { width: 20px; height: 20px; }

/* Cards */
.avkh-card {
  background: #fff; border: 1px solid var(--av-border); border-radius: var(--av-radius);
  overflow: hidden; box-shadow: var(--av-shadow); color: var(--av-text);
}
.avkh-card--guide, .avkh-card--insight, .avkh-loop-card.avkh-card--guide { border-bottom: 4px solid var(--av-green-600); }
.avkh-loop-card { overflow: hidden; }
.avkh-card__img { width: 100%; height: 200px; object-fit: cover; }
.avkh-card__img--contain { object-fit: contain; background: var(--av-soft); height: 180px; padding: 16px; }
.avkh-card__body { padding: 20px; }
.avkh-card__body p { color: var(--av-text-2); margin: 8px 0 12px; }
.avkh-card--pad { padding: 20px; }
.avkh-card--tool { border-bottom: 3px solid var(--av-green-500); }
.avkh-card--tool .avkh-btn { margin-top: 8px; }
.avkh-card--app {
  display: grid; grid-template-columns: 220px 1fr;
}
.avkh-card--app .avkh-card__img { height: 100%; min-height: 160px; }
.avkh-card--app a { display: contents; color: inherit; }
.avkh-app-list { display: grid; gap: 16px; }
.avkh-meta { font-size: 13px; color: var(--av-muted); display: flex; gap: 8px; align-items: center; }
.avkh-dot { width: 3px; height: 3px; background: var(--av-muted); border-radius: 50%; display: inline-block; }

/* Download rows */
.avkh-download-list { display: grid; gap: 12px; }
.avkh-card--download { border-left: 3px solid var(--av-green-500); }
.avkh-download-row {
  display: grid; grid-template-columns: 48px 1fr auto auto; gap: 16px; align-items: center; padding: 16px 20px;
}
.avkh-download-row h3 { margin: 0; }
.avkh-download-row p { margin: 4px 0 0; font-size: 14px; color: var(--av-text-2); }
.avkh-download-row__meta { display: flex; gap: 12px; font-size: 12px; font-weight: 600; color: var(--av-green-600); text-transform: uppercase; }

/* Layout sections */
.avkh-section { padding: 72px 0; }
.avkh-section--tint { background: #fff; }
.avkh-section__head { display: flex; justify-content: space-between; align-items: flex-end; gap: 16px; margin-bottom: 28px; }
.avkh-split { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.avkh-feature-panel { position: relative; }
.avkh-feature-panel img { border-radius: var(--av-radius); width: 100%; }
.avkh-feature-panel__card {
  position: relative; margin-top: -60px; margin-left: 40px;
  background: #fff; border-radius: var(--av-radius); padding: 20px;
  border: 1px solid var(--av-border); box-shadow: var(--av-shadow);
}
.avkh-checklist { list-style: none; padding: 0; margin: 0; }
.avkh-checklist li { padding-left: 28px; position: relative; margin: 8px 0; }
.avkh-checklist li::before {
  content: ""; position: absolute; left: 0; top: 4px; width: 18px; height: 18px; border-radius: 50%;
  background: var(--av-mint) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath fill='%230da85d' d='M6.2 11.2 3 8l1.1-1.1 2.1 2.1 5.6-5.6L13 4.5z'/%3E%3C/svg%3E") center/12px no-repeat;
}

.avkh-banner {
  display: flex; justify-content: space-between; align-items: center; gap: 24px;
  border-radius: var(--av-radius); padding: 28px 32px; margin-top: 40px;
}
.avkh-banner--mint { background: var(--av-mint); }
.avkh-banner--navy { background: var(--av-navy-800); color: #fff; }
.avkh-banner--navy h2, .avkh-banner--navy p { color: #fff; }
.avkh-wras-mark { font-size: 28px; font-weight: 800; color: var(--av-navy-700); margin: 0; }
.avkh-wras-mark small { display: block; font-size: 11px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; }

.avkh-tools-strip {
  background: var(--av-navy-800); color: #fff; padding: 72px 0;
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size: 40px 40px;
}
.avkh-tools-strip h2 { color: #fff; }
.avkh-tools-strip__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.avkh-mini-tool {
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--av-radius); padding: 20px; color: #fff;
}
.avkh-mini-tool span { display: block; color: var(--av-inverse-muted); font-size: 14px; margin-top: 6px; }

/* Guide */
.avkh-tabs {
  display: flex; gap: 8px; flex-wrap: wrap; padding: 20px 0;
  border-bottom: 1px solid var(--av-border);
}
.avkh-tabs a {
  padding: 10px 16px; border-radius: 999px; color: var(--av-text-2); font-weight: 600; font-size: 14px;
}
.avkh-tabs a.is-active { background: var(--av-navy-800); color: #fff; }
.avkh-guide__layout { display: grid; grid-template-columns: 1fr 320px; gap: 28px; padding: 32px 0 64px; }
.avkh-guide__main { background: #fff; border: 1px solid var(--av-border); border-radius: var(--av-radius); padding: 32px; }
.avkh-pager { display: flex; justify-content: space-between; gap: 12px; margin-top: 32px; }
.avkh-help {
  background: var(--av-navy-800); color: #fff; border-radius: var(--av-radius); padding: 24px; margin-top: 16px;
}
.avkh-help p { color: var(--av-inverse-muted); }

.avkh-article { display: grid; grid-template-columns: 1fr 300px; gap: 28px; padding: 40px 0 64px; }
.avkh-article__body, .avkh-prose { background: #fff; border-radius: var(--av-radius); padding: 32px; border: 1px solid var(--av-border); }
.avkh-article__hero img { border-radius: 12px; width: 100%; margin-bottom: 24px; }
.avkh-prose p { color: var(--av-text-2); }
.avkh-callout { border-radius: 12px; padding: 16px 18px; margin: 20px 0; }
.avkh-callout--mint { background: var(--av-mint); }
.avkh-callout--warn { background: var(--av-warn); }
.avkh-plain-list { list-style: none; margin: 0; padding: 0; }
.avkh-plain-list li { padding: 10px 0; border-bottom: 1px solid var(--av-border); }
.avkh-plain-list a { color: var(--av-text); display: flex; justify-content: space-between; gap: 8px; }
.avkh-plain-list span { color: var(--av-muted); font-size: 13px; }

.avkh-table-wrap { overflow-x: auto; border: 1px solid var(--av-border); border-radius: 12px; }
.avkh-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.avkh-table th, .avkh-table td { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--av-border); }
.avkh-table th { background: var(--av-soft); font-size: 12px; text-transform: uppercase; letter-spacing: .06em; }

.avkh-tool { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.avkh-tool__form label { display: grid; gap: 6px; margin-bottom: 14px; font-size: 14px; font-weight: 600; }
.avkh-tool__form input, .avkh-tool__form select {
  font: inherit; padding: 10px 12px; border-radius: 10px; border: 1px solid var(--av-border-strong); background: #fff;
}
.avkh-tool__result h3 { font-size: 28px; }
.avkh-metrics { display: grid; gap: 12px; margin: 16px 0; }
.avkh-metric { display: flex; justify-content: space-between; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--av-border); }
.avkh-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.avkh-step { background: #fff; border: 1px solid var(--av-border); border-radius: var(--av-radius); padding: 20px; }

.avkh-az { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; padding: 0; }
.avkh-az a, .avkh-az span {
  width: 36px; height: 36px; display: grid; place-items: center; border-radius: 8px; font-weight: 700;
}
.avkh-az a { background: #fff; color: var(--av-text); border: 1px solid var(--av-border); }
.avkh-az span { color: var(--av-muted); }
.avkh-az-group { margin-bottom: 40px; }
.avkh-inline-search { margin: 20px 0; }
.avkh-inline-search input {
  width: min(520px, 100%); padding: 12px 16px; border-radius: 999px; border: 1px solid var(--av-border); font: inherit;
}
.avkh-count-line { color: var(--av-muted); font-size: 14px; margin-bottom: 16px; }
.avkh-empty { color: var(--av-text-2); }

.avkh-search-modal {
  position: fixed; inset: 0; background: rgba(6, 35, 61, .55); z-index: 80;
  display: grid; place-items: start center; padding-top: 12vh;
}
.avkh-search-modal[hidden] { display: none; }
.avkh-search-modal__panel { width: min(720px, calc(100% - 32px)); background: #fff; border-radius: 16px; overflow: hidden; }
.avkh-search-modal__panel form { display: flex; align-items: center; gap: 10px; padding: 16px; border-bottom: 1px solid var(--av-border); }
.avkh-search-modal__panel input { flex: 1; border: 0; font: inherit; outline: none; }
.avkh-search-modal__results a { display: block; padding: 12px 16px; color: var(--av-text); border-bottom: 1px solid var(--av-border); }
.avkh-search-modal__results small { color: var(--av-green-600); font-weight: 700; text-transform: uppercase; letter-spacing: .06em; margin-right: 8px; }

nav.pagination .nav-links { display: flex; gap: 8px; justify-content: center; margin-top: 32px; }
nav.pagination a, nav.pagination span {
  min-width: 40px; height: 40px; display: grid; place-items: center; border-radius: 8px; border: 1px solid var(--av-border); background: #fff; color: var(--av-text);
}
nav.pagination .current { background: var(--av-navy-800); color: #fff; border-color: var(--av-navy-800); }

/* Footer */
.avkh-footer {
  background: linear-gradient(180deg, #08345a 0%, #041a2f 100%);
  color: var(--av-inverse-muted);
  padding: 50px 0;
  position: relative;
  overflow: hidden;
}
.avkh-footer::after {
  content: "";
  position: absolute; inset: 0 0 0 auto;
  width: 320px;
  background: url("../img/footer-mark.svg") no-repeat right center / contain;
  pointer-events: none;
}
.avkh-footer__grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr 1fr; gap: 32px; position: relative; z-index: 1; }
.avkh-footer h2 { color: #fff; font-size: 14px; line-height: 20px; font-weight: 600; letter-spacing: 0; margin: 0 0 15px; }
.avkh-footer ul { list-style: none; margin: 0; padding: 0; }
.avkh-footer li { margin: 0 0 10px; }
.avkh-footer a { color: var(--av-inverse-muted); font-size: 14px; line-height: 22px; font-weight: 500; }
.avkh-footer a:hover { color: #fff; }
.avkh-footer__legal {
  display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap;
  margin-top: 40px; padding-top: 30px; border-top: 1px solid rgba(255,255,255,.1);
  font-size: 13px; line-height: 20px; position: relative; z-index: 1;
}
.avkh-footer__legal p { margin: 0; }
.avkh-footer__legal p:last-child { display: flex; gap: 20px; }
.avkh-footer__legal a { margin-left: 0; font-size: 14px; font-weight: 600; line-height: 20px; }
.avkh-footer--el .elementor-widget-shortcode,
.avkh-header--el .elementor-widget-shortcode { width: auto; }
.avkh-footer--el .avkh-footer__legal { width: 100%; }

.avkh-icon { width: 20px; height: 20px; fill: currentColor; }

/* 1-col cards on small screens (locked decision until mobile frames arrive) */
@media (max-width: 1024px) {
  .avkh-tiles, .avkh-grid--guide, .avkh-grid--insight, .avkh-grid--product, .avkh-grid--glossary, .avkh-grid--tool,
  .avkh-tools-strip__grid, .avkh-steps { grid-template-columns: 1fr 1fr; }
  .avkh-hero__split, .avkh-split, .avkh-guide__layout, .avkh-article, .avkh-tool, .avkh-footer__grid, .avkh-card--app {
    grid-template-columns: 1fr;
  }
  .avkh-nav { display: none; }
  .avkh-header.is-open .avkh-nav { display: block; position: absolute; inset: 84px 0 auto; background: var(--av-navy-800); padding: 16px 24px 24px; }
  .avkh-header.is-open .avkh-nav__list { flex-direction: column; }
  .avkh-burger { display: block; }
  .avkh-search-btn span { display: none; }
  .avkh-search-btn { min-width: 0; }
  .avkh-download-row { grid-template-columns: 48px 1fr; }
  .avkh-download-row .avkh-btn { grid-column: 1 / -1; }
}
@media (max-width: 720px) {
  .avkh-tiles, .avkh-grid--guide, .avkh-grid--insight, .avkh-grid--product, .avkh-grid--glossary, .avkh-grid--tool,
  .avkh-tools-strip__grid, .avkh-steps { grid-template-columns: 1fr; }
  h1 { font-size: 36px; }
  .avkh-hero--home { padding: 48px 0 100px; }
  .avkh-banner { flex-direction: column; align-items: flex-start; }
}