.hstt-kb-page {
    --hstt-ink:#10233f;
    --hstt-blue:#0f4c81;
    --hstt-blue-soft:#eef6fb;
    --hstt-gold:#f5a623;
    --hstt-line:#dfe7ee;
    --hstt-muted:#5f6f7d;
    background:#fff;
    color:var(--hstt-ink);
}

.hstt-kb-shell {
    width:min(1180px, calc(100% - 40px));
    margin:0 auto;
}

.hstt-kb-hero {
    background:linear-gradient(180deg,#f5f9fc 0%,#ffffff 100%);
    border-bottom:1px solid var(--hstt-line);
    padding:58px 0 44px;
}

.hstt-kb-kicker {
    display:inline-block;
    font-size:.8rem;
    line-height:1;
    font-weight:800;
    letter-spacing:.08em;
    text-transform:uppercase;
    color:var(--hstt-blue);
    background:var(--hstt-blue-soft);
    border-radius:999px;
    padding:9px 12px;
    margin-bottom:18px;
}

.hstt-kb-hero h1 {
    max-width:900px;
    margin:0;
    font-size:clamp(2.25rem,5vw,4.4rem);
    line-height:1.02;
    letter-spacing:-.035em;
    color:var(--hstt-ink);
}

.hstt-kb-deck {
    max-width:820px;
    margin:20px 0 0;
    font-size:clamp(1.05rem,2vw,1.3rem);
    line-height:1.65;
    color:var(--hstt-muted);
}

.hstt-kb-meta {
    display:flex;
    flex-wrap:wrap;
    gap:10px 18px;
    margin-top:22px;
    font-size:.92rem;
    color:var(--hstt-muted);
}
.hstt-kb-meta span + span:before {
    content:"•";
    margin-right:18px;
    color:#a8b4be;
}

.hstt-kb-layout {
    display:grid;
    grid-template-columns:260px minmax(0,780px);
    gap:58px;
    align-items:start;
    justify-content:center;
    padding-top:52px;
    padding-bottom:70px;
}

.hstt-kb-sidebar {
    position:relative;
}

.hstt-kb-toc {
    position:sticky;
    top:110px;
    border:1px solid var(--hstt-line);
    border-radius:16px;
    background:#fff;
    padding:20px 18px;
    box-shadow:0 10px 30px rgba(16,35,63,.05);
    max-height:calc(100vh - 140px);
    overflow:auto;
}

.hstt-kb-toc-title {
    font-size:.86rem;
    font-weight:800;
    text-transform:uppercase;
    letter-spacing:.06em;
    margin-bottom:10px;
    color:var(--hstt-ink);
}

.hstt-kb-toc nav {
    display:flex;
    flex-direction:column;
}

.hstt-kb-toc a {
    color:#536473;
    text-decoration:none;
    font-size:.92rem;
    line-height:1.35;
    padding:8px 0 8px 12px;
    border-left:2px solid #e8edf1;
}
.hstt-kb-toc a:hover {
    color:var(--hstt-blue);
    border-left-color:var(--hstt-gold);
}

.hstt-kb-article {
    font-size:1.08rem;
    line-height:1.82;
    color:#2d3b47;
}

.hstt-kb-article > p:first-child {
    font-size:1.2rem;
    line-height:1.75;
    color:#334755;
}

.hstt-kb-article p {
    margin:0 0 1.35em;
}

.hstt-kb-article h2 {
    scroll-margin-top:120px;
    margin:2.35em 0 .65em;
    font-size:clamp(1.55rem,3vw,2.1rem);
    line-height:1.16;
    letter-spacing:-.02em;
    color:var(--hstt-ink);
    padding-top:.15em;
}

.hstt-kb-article h2:before {
    content:"";
    display:block;
    width:42px;
    height:4px;
    background:var(--hstt-gold);
    border-radius:99px;
    margin-bottom:14px;
}

.hstt-kb-article h3 {
    margin:1.8em 0 .5em;
    font-size:1.3rem;
    color:var(--hstt-ink);
}

.hstt-kb-article ul,
.hstt-kb-article ol {
    margin:0 0 1.5em 1.15em;
}

.hstt-kb-article li {
    margin:.45em 0;
    padding-left:.2em;
}

.hstt-kb-article blockquote {
    margin:2em 0;
    padding:20px 24px;
    border-left:4px solid var(--hstt-gold);
    background:#fbfcfd;
    color:#3c4b58;
    border-radius:0 12px 12px 0;
}

.hstt-kb-article table {
    width:100%;
    border-collapse:separate;
    border-spacing:0;
    margin:2em 0;
    border:1px solid var(--hstt-line);
    border-radius:12px;
    overflow:hidden;
}
.hstt-kb-article th,
.hstt-kb-article td {
    padding:12px 14px;
    border-bottom:1px solid var(--hstt-line);
    text-align:left;
}
.hstt-kb-article th {
    background:#f6f9fb;
    color:var(--hstt-ink);
}

.hstt-kb-cta {
    margin-top:64px;
    padding:34px;
    border-radius:22px;
    background:var(--hstt-ink);
    color:#fff;
    box-shadow:0 18px 46px rgba(16,35,63,.15);
}
.hstt-kb-cta-label {
    color:#ffd07a;
    text-transform:uppercase;
    letter-spacing:.07em;
    font-size:.78rem;
    font-weight:800;
}
.hstt-kb-cta h2 {
    color:#fff;
    margin:.35em 0 .5em;
    padding:0;
}
.hstt-kb-cta h2:before {
    display:none;
}
.hstt-kb-cta p {
    color:#dfe7ee;
    margin-bottom:0;
}
.hstt-kb-cta-actions {
    display:flex;
    flex-wrap:wrap;
    gap:12px;
    margin-top:22px;
}
.hstt-kb-btn {
    display:inline-flex;
    align-items:center;
    justify-content:center;
    text-decoration:none!important;
    font-weight:800;
    border-radius:10px;
    padding:12px 18px;
    transition:.15s ease;
}
.hstt-kb-btn-primary {
    background:var(--hstt-gold);
    color:#10233f!important;
}
.hstt-kb-btn-secondary {
    border:1px solid rgba(255,255,255,.35);
    color:#fff!important;
}
.hstt-kb-btn:hover {
    transform:translateY(-1px);
}

@media (max-width: 980px) {
    .hstt-kb-layout {
        grid-template-columns:1fr;
        gap:24px;
    }
    .hstt-kb-sidebar {
        order:0;
    }
    .hstt-kb-toc {
        position:static;
        max-height:none;
    }
    .hstt-kb-toc nav {
        display:grid;
        grid-template-columns:repeat(2,minmax(0,1fr));
        column-gap:18px;
    }
}

@media (max-width: 640px) {
    .hstt-kb-shell {
        width:min(100% - 28px, 1180px);
    }
    .hstt-kb-hero {
        padding:36px 0 28px;
    }
    .hstt-kb-layout {
        padding-top:28px;
        padding-bottom:44px;
    }
    .hstt-kb-meta {
        display:block;
    }
    .hstt-kb-meta span {
        display:block;
        margin-top:5px;
    }
    .hstt-kb-meta span + span:before {
        display:none;
    }
    .hstt-kb-toc nav {
        grid-template-columns:1fr;
    }
    .hstt-kb-article {
        font-size:1rem;
        line-height:1.74;
    }
    .hstt-kb-cta {
        padding:25px 20px;
        border-radius:16px;
    }
}


/* Knowledge Base directory */
.hstt-kb-directory {
    --hstt-ink:#071a31;
    --hstt-blue:#135d98;
    --hstt-blue-soft:#eaf5fd;
    --hstt-gold:#f59e0b;
    --hstt-gold-soft:#fff5df;
    --hstt-line:#dbe5ed;
    --hstt-muted:#586a78;
    --hstt-bg:#f5f8fb;
    background:var(--hstt-bg);
    color:var(--hstt-ink);
}

.hstt-kb-directory .hstt-kb-shell {
    width:min(1180px, calc(100% - 40px));
    margin:0 auto;
}

.hstt-kb-directory-hero {
    position:relative;
    overflow:hidden;
    background:
        radial-gradient(circle at 84% 22%, rgba(245,158,11,.16), transparent 18rem),
        radial-gradient(circle at 8% 0%, rgba(19,93,152,.12), transparent 23rem),
        linear-gradient(180deg,#f8fbfd 0%,#ffffff 100%);
    border-bottom:1px solid var(--hstt-line);
    padding:72px 0 58px;
}

.hstt-kb-directory-hero h1 {
    max-width:860px;
    margin:0;
    color:var(--hstt-ink);
    font-size:clamp(2.65rem,6vw,5rem);
    line-height:.98;
    letter-spacing:-.045em;
    text-transform:none;
}

.hstt-kb-directory-intro {
    max-width:810px;
    margin:24px 0 0;
    font-size:clamp(1.05rem,2vw,1.28rem);
    line-height:1.72;
    color:var(--hstt-muted);
}

.hstt-kb-directory .hstt-kb-kicker,
.hstt-kb-eyebrow {
    display:block;
    margin-bottom:12px;
    color:var(--hstt-blue);
    font-size:.78rem;
    font-weight:900;
    letter-spacing:.09em;
    line-height:1.2;
    text-transform:uppercase;
}

.hstt-kb-search {
    display:flex;
    gap:10px;
    max-width:760px;
    margin-top:32px;
    padding:7px;
    background:#fff;
    border:1px solid var(--hstt-line);
    border-radius:16px;
    box-shadow:0 18px 44px rgba(7,26,49,.08);
}

.hstt-kb-search input[type="search"] {
    flex:1;
    min-width:0;
    height:52px;
    margin:0;
    border:0;
    background:transparent;
    box-shadow:none;
    padding:0 14px;
    font-size:1rem;
    color:var(--hstt-ink);
}

.hstt-kb-search input[type="search"]:focus {
    outline:none;
    box-shadow:none;
}

.hstt-kb-search button {
    min-width:145px;
    border:0;
    border-radius:11px;
    background:var(--hstt-blue);
    color:#fff;
    padding:0 20px;
    font-weight:900;
    cursor:pointer;
}

.hstt-kb-browse-section {
    padding:48px 0 42px;
}

.hstt-kb-section-heading,
.hstt-kb-list-heading {
    display:flex;
    align-items:flex-end;
    justify-content:space-between;
    gap:24px;
    margin-bottom:24px;
}

.hstt-kb-section-heading h2,
.hstt-kb-list-heading h2 {
    margin:0;
    color:var(--hstt-ink);
    font-size:clamp(1.65rem,3vw,2.45rem);
    line-height:1.12;
    letter-spacing:-.025em;
    text-transform:none;
}

.hstt-kb-list-heading p {
    margin:8px 0 0;
    color:var(--hstt-muted);
}

.hstt-kb-clear {
    color:var(--hstt-blue);
    font-weight:800;
    text-decoration:none;
}

.hstt-kb-subject-grid {
    display:grid;
    grid-template-columns:repeat(4,minmax(0,1fr));
    gap:16px;
}

.hstt-kb-subject-card {
    position:relative;
    display:flex;
    flex-direction:column;
    min-height:190px;
    padding:24px;
    overflow:hidden;
    border:1px solid var(--hstt-line);
    border-radius:18px;
    background:#fff;
    color:var(--hstt-ink);
    text-decoration:none!important;
    box-shadow:0 10px 28px rgba(7,26,49,.045);
    transition:transform .16s ease, box-shadow .16s ease, border-color .16s ease;
}

.hstt-kb-subject-card:before {
    content:"";
    position:absolute;
    top:0;
    left:0;
    right:0;
    height:5px;
    background:var(--hstt-gold);
}

.hstt-kb-subject-card:hover,
.hstt-kb-subject-card.is-active {
    transform:translateY(-3px);
    border-color:#b8d6ea;
    box-shadow:0 18px 40px rgba(7,26,49,.09);
}

.hstt-kb-subject-card.is-active {
    background:linear-gradient(180deg,#f4faff 0%,#fff 100%);
}

.hstt-kb-subject-name {
    display:block;
    margin-top:4px;
    font-size:1.35rem;
    line-height:1.1;
    font-weight:900;
}

.hstt-kb-subject-desc {
    display:block;
    margin-top:12px;
    color:var(--hstt-muted);
    font-size:.94rem;
    line-height:1.55;
}

.hstt-kb-subject-count {
    display:block;
    margin-top:auto;
    padding-top:20px;
    color:var(--hstt-blue);
    font-size:.83rem;
    font-weight:900;
    text-transform:uppercase;
    letter-spacing:.04em;
}

.hstt-kb-guides-section {
    padding:20px 0 80px;
}

.hstt-kb-article-grid {
    display:grid;
    grid-template-columns:repeat(3,minmax(0,1fr));
    gap:20px;
}

.hstt-kb-guide-card {
    position:relative;
    min-width:0;
    overflow:hidden;
    background:#fff;
    border:1px solid var(--hstt-line);
    border-radius:20px;
    box-shadow:0 10px 28px rgba(7,26,49,.04);
    transition:transform .16s ease, box-shadow .16s ease;
}

.hstt-kb-guide-card:hover {
    transform:translateY(-3px);
    box-shadow:0 18px 42px rgba(7,26,49,.085);
}

.hstt-kb-guide-card-accent {
    height:6px;
    background:linear-gradient(90deg,var(--hstt-blue),#52a7df 65%,var(--hstt-gold));
}

.hstt-kb-guide-card-inner {
    display:flex;
    flex-direction:column;
    min-height:330px;
    padding:25px 25px 23px;
}

.hstt-kb-guide-meta {
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    gap:8px 12px;
    color:#81909b;
    font-size:.75rem;
    font-weight:800;
    text-transform:uppercase;
    letter-spacing:.05em;
}

.hstt-kb-guide-subject {
    color:var(--hstt-blue);
}

.hstt-kb-guide-card h3 {
    margin:14px 0 12px;
    font-size:1.47rem;
    line-height:1.17;
    letter-spacing:-.025em;
    text-transform:none;
}

.hstt-kb-guide-card h3 a {
    color:var(--hstt-ink);
    text-decoration:none;
}

.hstt-kb-guide-card p {
    margin:0 0 18px;
    color:var(--hstt-muted);
    font-size:.96rem;
    line-height:1.62;
}

.hstt-kb-guide-grades {
    margin-top:auto;
    padding-top:7px;
    color:#7a8994;
    font-size:.78rem;
    line-height:1.45;
}

.hstt-kb-guide-link {
    display:inline-flex;
    align-items:center;
    gap:7px;
    margin-top:15px;
    color:var(--hstt-blue);
    font-size:.86rem;
    font-weight:900;
    text-decoration:none!important;
    text-transform:uppercase;
    letter-spacing:.04em;
}

.hstt-kb-empty {
    background:#fff;
    border:1px solid var(--hstt-line);
    border-radius:20px;
    padding:44px;
    text-align:center;
}

@media (max-width: 1000px) {
    .hstt-kb-subject-grid { grid-template-columns:repeat(2,minmax(0,1fr)); }
    .hstt-kb-article-grid { grid-template-columns:repeat(2,minmax(0,1fr)); }
}

@media (max-width: 650px) {
    .hstt-kb-directory .hstt-kb-shell {
        width:min(100% - 28px,1180px);
    }
    .hstt-kb-directory-hero {
        padding:46px 0 38px;
    }
    .hstt-kb-search {
        display:block;
        padding:7px;
    }
    .hstt-kb-search input[type="search"] {
        width:100%;
    }
    .hstt-kb-search button {
        width:100%;
        height:48px;
        margin-top:4px;
    }
    .hstt-kb-section-heading,
    .hstt-kb-list-heading {
        display:block;
    }
    .hstt-kb-clear {
        display:inline-block;
        margin-top:12px;
    }
    .hstt-kb-subject-grid,
    .hstt-kb-article-grid {
        grid-template-columns:1fr;
    }
    .hstt-kb-subject-card {
        min-height:165px;
    }
    .hstt-kb-guide-card-inner {
        min-height:0;
    }
}

/* Standalone Knowledge Base subject row shortcode
   Mirrors the subject cards used on the Knowledge Base archive. */
.hstt-kb-shortcode-row {
    --hstt-ink:#071a31;
    --hstt-blue:#135d98;
    --hstt-blue-soft:#eaf5fd;
    --hstt-gold:#f59e0b;
    --hstt-line:#dbe5ed;
    --hstt-muted:#586a78;

    display:grid;
    grid-template-columns:repeat(4,minmax(0,1fr));
    gap:16px;
    width:100%;
}

.hstt-kb-shortcode-row .hstt-kb-subject-card {
    position:relative;
    display:flex;
    flex-direction:column;
    min-width:0;
    min-height:190px;
    padding:24px;
    overflow:hidden;
    border:1px solid var(--hstt-line);
    border-radius:18px;
    background:#fff;
    color:var(--hstt-ink) !important;
    text-decoration:none !important;
    box-shadow:0 10px 28px rgba(7,26,49,.045);
    transition:transform .16s ease, box-shadow .16s ease, border-color .16s ease;
    box-sizing:border-box;
}

.hstt-kb-shortcode-row .hstt-kb-subject-card:before {
    content:"";
    position:absolute;
    top:0;
    left:0;
    right:0;
    height:5px;
    background:var(--hstt-gold);
}

.hstt-kb-shortcode-row .hstt-kb-subject-card:hover {
    transform:translateY(-3px);
    border-color:#b8d6ea;
    box-shadow:0 18px 40px rgba(7,26,49,.09);
}

.hstt-kb-shortcode-row .hstt-kb-subject-name {
    display:block;
    margin-top:4px;
    color:var(--hstt-ink);
    font-size:1.35rem;
    line-height:1.1;
    font-weight:900;
    text-transform:none;
}

.hstt-kb-shortcode-row .hstt-kb-subject-desc {
    display:block;
    margin-top:12px;
    color:var(--hstt-muted);
    font-size:.94rem;
    line-height:1.55;
    font-weight:400;
}

.hstt-kb-shortcode-row .hstt-kb-subject-count {
    display:block;
    margin-top:auto;
    padding-top:20px;
    color:var(--hstt-blue);
    font-size:.83rem;
    line-height:1.2;
    font-weight:900;
    text-transform:uppercase;
    letter-spacing:.04em;
}

@media (max-width:1000px) {
    .hstt-kb-shortcode-row {
        grid-template-columns:repeat(2,minmax(0,1fr));
    }
}

@media (max-width:620px) {
    .hstt-kb-shortcode-row {
        grid-template-columns:1fr;
    }

    .hstt-kb-shortcode-row .hstt-kb-subject-card {
        min-height:165px;
    }
}