/* =====================================================================
 * HydroPoint Knowledge Base — theme layer (brand-tokens.css supplies vars)
 * ===================================================================== */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; overflow-x: hidden; }
img { max-width: 100%; height: auto; display: block; }

.wrap { width: 100%; max-width: 1160px; margin-inline: auto; padding-inline: var(--s-5); }

.skip-link {
    position: absolute; left: -9999px; top: 0; z-index: 100;
    background: var(--hp-navy); color: #fff; padding: var(--s-3) var(--s-4);
}
.skip-link:focus { left: var(--s-4); top: var(--s-4); }
.skip-link::after { content: none; }

/* ---------- Site header ---------- */
.site-header {
    position: sticky; top: 0; z-index: 40;
    background: var(--hp-navy);
    border-bottom: 1px solid rgba(255,255,255,.08);
}
.site-header__inner { display: flex; align-items: center; gap: var(--s-6); height: 68px; }
.site-header__brand { display: flex; align-items: center; gap: var(--s-4); text-decoration: none; }
.site-header__brand::after { content: none; }
.site-header__logo { height: 26px; width: auto; }
.site-header__kb {
    color: #fff; font-weight: var(--fw-medium); font-size: var(--fs-sm);
    padding-left: var(--s-4); border-left: 1px solid rgba(255,255,255,.22);
    letter-spacing: .01em;
}
.site-nav { margin-left: auto; }
.site-nav ul { list-style: none; display: flex; gap: var(--s-6); margin: 0; padding: 0; }
.site-nav li { margin: 0; }
.site-nav a {
    color: rgba(255,255,255,.82); font-weight: var(--fw-medium); font-size: var(--fs-sm);
    text-decoration: none;
}
.site-nav a::after { background: var(--hp-polar); bottom: -6px; }
.site-nav a:hover { color: #fff; }

.site-search {
    display: inline-flex; align-items: center; gap: var(--s-3);
    background: rgba(255,255,255,.08); color: rgba(255,255,255,.85);
    border: 1px solid rgba(255,255,255,.16); border-radius: var(--radius-md);
    padding: 9px 14px; cursor: pointer; font-family: var(--font-sans); font-size: var(--fs-sm);
    transition: background var(--dur-fast) var(--ease-standard), border-color var(--dur-fast) var(--ease-standard);
}
.site-search:hover { background: rgba(255,255,255,.14); border-color: rgba(255,255,255,.3); }
.site-search kbd {
    font-family: var(--font-sans); font-size: var(--fs-xs); background: rgba(255,255,255,.14);
    border-radius: var(--radius-sm); padding: 1px 7px; color: #fff;
}

/* ---------- Hero ---------- */
.hero {
    position: relative; background: var(--grad-navy); color: #fff; overflow: hidden;
    padding: var(--s-10) 0 var(--s-9);
}
.hero__wave {
    position: absolute; inset: 0; z-index: 0;
    background: url("../img/cover_wave_bg.png") right bottom / cover no-repeat;
    opacity: .35; mix-blend-mode: screen;
}
.hero__inner { position: relative; z-index: 1; max-width: 760px; }
.hero__eyebrow { color: var(--hp-polar); margin-bottom: var(--s-4); }
.hero__title {
    color: #fff; font-size: clamp(48px, 7vw, var(--fs-display)); line-height: var(--lh-display);
    letter-spacing: -0.02em; margin: 0 0 var(--s-4);
}
.hero__lede { font-size: 20px; line-height: 1.5; color: rgba(255,255,255,.8); max-width: 620px; margin-bottom: var(--s-7); }

.hero__search {
    display: flex; align-items: center; gap: var(--s-4); width: 100%; max-width: 620px;
    background: #fff; color: var(--color-fg-muted); border: none; border-radius: var(--radius-md);
    padding: 18px 22px; cursor: pointer; font-family: var(--font-sans); font-size: 17px;
    text-align: left; box-shadow: var(--shadow-3);
    transition: transform var(--dur-fast) var(--ease-standard);
}
.hero__search:hover { transform: translateY(-1px); }
.hero__search svg { color: var(--hp-blue); flex-shrink: 0; }
.hero__search span { flex: 1; }
.hero__search kbd {
    font-family: var(--font-sans); font-size: var(--fs-sm); color: var(--color-fg-muted);
    background: var(--util-grey-100); border-radius: var(--radius-sm); padding: 2px 9px;
}

/* ---------- Section headers ---------- */
.section-head { margin: var(--s-9) 0 var(--s-6); }
.topics.wrap, .popular.wrap { padding-top: 0; }
.section-head__title { color: var(--hp-navy); font-size: var(--fs-h2); margin: 0 0 var(--s-2); }
.section-head__sub { color: var(--color-fg-muted); font-size: var(--fs-body); margin: 0; }

/* ---------- Topic grid ---------- */
.topic-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(272px, 1fr)); gap: var(--s-4);
}
.topic-card {
    position: relative; display: flex; flex-direction: column;
    background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-0);
    padding: var(--s-6) var(--s-5) var(--s-5); text-decoration: none; overflow: hidden;
    transition: border-color var(--dur-base) var(--ease-standard), box-shadow var(--dur-base) var(--ease-standard), transform var(--dur-base) var(--ease-standard);
}
.topic-card::after { content: none; }
.topic-card__accent {
    position: absolute; left: 0; top: 0; height: 100%; width: 4px; background: var(--hp-blue);
    transform: scaleY(0); transform-origin: top; transition: transform var(--dur-base) var(--ease-standard);
}
.topic-card:hover { border-color: var(--hp-blue); box-shadow: var(--shadow-2); transform: translateY(-2px); }
.topic-card:hover .topic-card__accent { transform: scaleY(1); }
.topic-card__name { color: var(--hp-navy); font-size: var(--fs-h4); font-weight: var(--fw-semibold); margin: 0 0 var(--s-3); line-height: 1.25; }
.topic-card__desc { color: var(--color-fg-muted); font-size: var(--fs-sm); margin: 0 0 var(--s-4); }
.topic-card__count { color: var(--hp-cadet); font-size: var(--fs-xs); font-weight: var(--fw-semibold); text-transform: uppercase; letter-spacing: .08em; margin-top: auto; }
.topic-card__go { position: absolute; right: var(--s-5); top: var(--s-5); color: var(--hp-blue); font-size: 20px; opacity: 0; transform: translateX(-4px); transition: opacity var(--dur-base) var(--ease-standard), transform var(--dur-base) var(--ease-standard); }
.topic-card:hover .topic-card__go { opacity: 1; transform: translateX(0); }

/* ---------- Article list ---------- */
.article-list { list-style: none; margin: 0 0 var(--s-6); padding: 0; border-top: 1px solid var(--color-border); }
.article-row { margin: 0; border-bottom: 1px solid var(--color-border); }
.article-row__link { display: flex; align-items: center; gap: var(--s-5); padding: var(--s-5) var(--s-2); text-decoration: none; transition: background var(--dur-fast) var(--ease-standard); }
.article-row__link::after { content: none; }
.article-row__link:hover { background: var(--color-bg-alt); }
.article-row__body { display: flex; flex-direction: column; gap: 4px; flex: 1; min-width: 0; }
.article-row__title { color: var(--hp-navy); font-weight: var(--fw-semibold); font-size: 17px; }
.article-row__link:hover .article-row__title { color: var(--hp-cadet); }
.article-row__excerpt { color: var(--color-fg-muted); font-size: var(--fs-sm); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.article-row__tag { flex-shrink: 0; color: var(--hp-cadet); font-size: var(--fs-xs); font-weight: var(--fw-semibold); text-transform: uppercase; letter-spacing: .06em; background: var(--hp-ice-blue); padding: 4px 10px; border-radius: var(--radius-md); }

/* ---------- Doc layout (tag + post) ---------- */
.doc-layout { display: grid; grid-template-columns: 260px 1fr; gap: var(--s-8); padding-top: var(--s-7); padding-bottom: var(--s-9); align-items: start; }
.doc-nav { position: sticky; top: 92px; max-height: calc(100vh - 112px); overflow-y: auto; }
.doc-nav__head { font-size: var(--fs-xs); font-weight: var(--fw-bold); text-transform: uppercase; letter-spacing: .1em; color: var(--color-fg-muted); margin: 0 0 var(--s-3); }
.doc-nav__head a { color: var(--hp-cadet); font-weight: var(--fw-bold); }
.doc-nav__list { list-style: none; margin: 0; padding: 0; }
.doc-nav__list li { margin: 0; }
.doc-nav__item { display: flex; justify-content: space-between; gap: var(--s-3); align-items: baseline; padding: 7px 10px; font-size: var(--fs-sm); font-weight: var(--fw-regular); color: var(--hp-navy); text-decoration: none; border-left: 2px solid transparent; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
.doc-nav__item::after { content: none; }
.doc-nav__item span { color: var(--color-fg-muted); font-size: var(--fs-xs); }
.doc-nav__item:hover { background: var(--color-bg-alt); color: var(--hp-cadet); }
.doc-nav__item.is-active { border-left-color: var(--hp-blue); background: var(--hp-ice-blue); color: var(--hp-navy); font-weight: var(--fw-semibold); }

.doc-body { min-width: 0; }
.crumbs { font-size: var(--fs-sm); color: var(--color-fg-muted); margin-bottom: var(--s-5); }
.crumbs a { color: var(--hp-cadet); font-weight: var(--fw-medium); }
.crumbs span { margin: 0 var(--s-2); }

.topic-header { border-bottom: 1px solid var(--color-border); padding-bottom: var(--s-6); margin-bottom: var(--s-6); }
.topic-header__title { color: var(--hp-navy); font-size: var(--fs-h1); margin: var(--s-2) 0 var(--s-3); letter-spacing: -0.02em; }
.topic-header__desc { color: var(--color-fg-muted); font-size: 18px; max-width: 640px; margin: 0 0 var(--s-4); }
.topic-header__count { color: var(--hp-cadet); font-size: var(--fs-sm); font-weight: var(--fw-semibold); margin: 0; }

/* ---------- Article reading view ---------- */
.doc-body--article { max-width: 760px; }
.article-head { border-bottom: 1px solid var(--color-border); padding-bottom: var(--s-5); margin-bottom: var(--s-6); }
.article-head__title { color: var(--hp-navy); font-size: clamp(32px, 4.5vw, 46px); line-height: 1.12; letter-spacing: -0.02em; margin: var(--s-2) 0 var(--s-4); }
.article-head__meta { display: flex; flex-wrap: wrap; gap: var(--s-4); font-size: var(--fs-sm); color: var(--color-fg-muted); }
.article-head__author { color: var(--hp-navy); font-weight: var(--fw-semibold); }

/* Content typography — the article body from Ghost */
.article-content { color: var(--hp-navy); font-size: 17px; line-height: 1.65; }
.article-content > * + * { margin-top: var(--s-5); }
.article-content h2 { font-size: 26px; color: var(--hp-navy); font-weight: var(--fw-semibold); margin-top: var(--s-8); line-height: 1.25; }
.article-content h3 { font-size: 21px; color: var(--hp-navy); font-weight: var(--fw-semibold); margin-top: var(--s-6); }
.article-content h4 { font-size: 18px; color: var(--hp-ink-blue); font-weight: var(--fw-semibold); }
.article-content p { margin: 0; }
.article-content a { color: var(--hp-cadet); font-weight: var(--fw-semibold); text-decoration: underline; text-underline-offset: 2px; }
.article-content a::after { content: none; }
.article-content ul, .article-content ol { padding-left: var(--s-6); }
.article-content li { margin: 0 0 var(--s-2); }
.article-content li::marker { color: var(--hp-blue); }
.article-content img { border: 1px solid var(--color-border); border-radius: var(--radius-sm); margin-block: var(--s-5); }
.article-content figure { margin: var(--s-6) 0; }
/* Koenig editor image widths (required by Ghost) */
.article-content .kg-width-wide { width: min(1040px, 92vw); max-width: none; margin-inline: calc(50% - min(520px, 46vw)); }
.article-content .kg-width-full { width: 100vw; max-width: none; margin-inline: calc(50% - 50vw); }
.article-content .kg-width-full img { border-radius: 0; }
.article-content figcaption { font-size: var(--fs-sm); color: var(--color-fg-muted); text-align: center; margin-top: var(--s-3); }
.article-content blockquote { border-left: 4px solid var(--hp-blue); padding: var(--s-2) 0 var(--s-2) var(--s-5); margin: var(--s-6) 0; color: var(--color-fg-muted); font-size: 18px; }
.article-content table { width: 100%; border-collapse: collapse; font-size: var(--fs-sm); margin: var(--s-6) 0; }
.article-content th { background: var(--hp-navy); color: #fff; text-align: left; padding: 10px 14px; font-weight: var(--fw-semibold); }
.article-content td { border: 1px solid var(--color-border); padding: 10px 14px; }
.article-content pre { background: var(--hp-ink-blue); color: #e9f2f8; padding: var(--s-5); border-radius: var(--radius-sm); overflow-x: auto; font-size: var(--fs-sm); }
.article-content code { background: var(--util-grey-100); padding: 2px 6px; border-radius: var(--radius-sm); font-size: .9em; }
.article-content pre code { background: none; padding: 0; }
/* Preserve Helpjuice callouts, reskinned to brand */
.article-content .helpjuice-callout, .article-content .hj-alert-block { border-left: 4px solid var(--hp-blue); background: var(--hp-ice-blue); padding: var(--s-4) var(--s-5); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; margin: var(--s-6) 0; }
.article-content .helpjuice-callout h3, .article-content .hj-alert-block h3 { margin-top: 0; font-size: 17px; }

/* ---------- Helpful widget ---------- */
.helpful { display: flex; align-items: center; gap: var(--s-5); flex-wrap: wrap; margin: var(--s-8) 0; padding: var(--s-5) var(--s-6); background: var(--color-bg-alt); border-radius: var(--radius-sm); }
.helpful__q { font-weight: var(--fw-semibold); color: var(--hp-navy); }
.helpful__btns { display: flex; gap: var(--s-3); }
.btn--sm { padding: 7px 18px; font-size: var(--fs-sm); }
.helpful.is-done .helpful__btns { display: none; }
.helpful.is-done .helpful__q::after { content: " Thanks for the feedback."; color: var(--hp-cadet); font-weight: var(--fw-regular); }

/* ---------- Related ---------- */
.related { margin-top: var(--s-8); padding-top: var(--s-7); border-top: 1px solid var(--color-border); }
.related__head { font-size: var(--fs-h3); color: var(--hp-navy); margin-bottom: var(--s-4); }

/* ---------- Pagination ---------- */
.pagination { display: flex; justify-content: space-between; align-items: center; gap: var(--s-4); margin-top: var(--s-6); }
.pagination a { color: var(--hp-cadet); font-weight: var(--fw-semibold); }

/* ---------- Footer ---------- */
.site-footer { background: var(--hp-ink-blue); color: rgba(255,255,255,.7); margin-top: var(--s-10); padding: var(--s-8) 0; }
.site-footer__inner { display: grid; grid-template-columns: 1fr auto; gap: var(--s-6) var(--s-8); align-items: center; }
.site-footer__logo { height: 30px; margin-bottom: var(--s-3); }
.site-footer__tag { margin: 0; font-size: var(--fs-sm); }
.site-footer__nav ul { list-style: none; display: flex; gap: var(--s-6); margin: 0; padding: 0; }
.site-footer__nav a { color: rgba(255,255,255,.7); font-weight: var(--fw-medium); font-size: var(--fs-sm); }
.site-footer__nav a:hover { color: #fff; }
.site-footer__legal { grid-column: 1 / -1; font-size: var(--fs-xs); color: rgba(255,255,255,.45); margin: var(--s-5) 0 0; padding-top: var(--s-5); border-top: 1px solid rgba(255,255,255,.1); }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
    .doc-layout { grid-template-columns: 1fr; gap: var(--s-6); }
    .doc-nav { position: static; max-height: none; order: 2; border-top: 1px solid var(--color-border); padding-top: var(--s-6); }
    .doc-body--article { max-width: none; }
    .site-nav { display: none; }
    .site-search span { display: none; }
    .site-header__inner { gap: var(--s-4); }
    .hero { padding: var(--s-8) 0 var(--s-7); }
}
@media (max-width: 520px) {
    .site-header__kb { display: none; }
    .article-row__tag { display: none; }
    .site-footer__inner { grid-template-columns: 1fr; }
}