/**
 * Knowledge Hub — hub landing and APT directory.
 */

.hp-kb-feature,
.hp-kb-areas,
.hp-kb-directory {
    padding-block: 88px;
}

.hp-kb-areas {
    padding-top: 0;
}

/* Search */
.hp-kb-search {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    max-width: 560px;
    margin-top: 8px;
    padding: 0 18px;
    border: 1px solid rgb(255 255 255 / .18);
    border-radius: var(--hp-radius-md);
    background: rgb(255 255 255 / .05);
    color: var(--hp-on-dark-faint);
    transition: border-color .15s ease;
}

.hp-kb-search:focus-within {
    border-color: var(--hp-coral);
}

.hp-kb-search__input {
    flex: 1;
    min-width: 0;
    height: 56px;
    padding: 0;
    border: 0;
    background: transparent;
    font-family: var(--hp-font-body);
    font-size: var(--bd-body-size);
    color: var(--hp-white);
}

.hp-kb-search__input::placeholder {
    color: var(--hp-on-dark-faint);
}

.hp-kb-hero .hp-kb-search__input:focus-visible {
    outline: 0;
}

/* Filters */
.hp-kb-directory {
    padding-top: 48px;
}

.hp-kb-filters {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding-bottom: 28px;
    border-bottom: 1px solid var(--hp-line);
}

.hp-kb-filters__group {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
}

.hp-kb-filters__label {
    width: 120px;
    font-family: var(--bd-font-mono);
    font-size: var(--bd-eyebrow-size);
    letter-spacing: var(--bd-eyebrow-track);
    text-transform: uppercase;
    color: var(--hp-ink-soft);
    font-weight: var(--bd-eyebrow-weight);
}

.hp-kb-chip {
    padding: 7px 14px;
    border: 1px solid var(--hp-line-strong);
    border-radius: 8px;
    background: var(--hp-white);
    font-size: var(--bd-small-size);
    font-weight: 600;
    line-height: 1.3;
    color: var(--hp-ink-muted);
    transition: background-color .15s ease, border-color .15s ease, color .15s ease;
}

.hp-kb-chip:hover {
    border-color: var(--hp-ink);
    color: var(--hp-ink);
}

.hp-kb-chip.is-active {
    border-color: var(--hp-navy-900);
    background: var(--hp-navy-900);
    color: var(--hp-white);
}

.hp-kb-directory__count {
    margin-block: 24px 20px;
    font-family: var(--hp-font-mono);
    font-size: 12px;
    color: var(--hp-ink-soft);
}

.hp-kb-directory__empty {
    padding: 48px 0;
    font-size: var(--bd-body-size);
    text-align: center;
    color: var(--hp-ink-muted);
}

.hp-kb-directory__reset {
    padding: 0;
    border: 0;
    background: none;
    font-weight: 600;
    color: var(--hp-coral);
    text-decoration: underline;
    text-underline-offset: 3px;
}

/* Other areas */
.hp-kb-areas__grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
}

.hp-kb-area {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 8px;
    height: 100%;
    padding: 28px;
    transition: border-color .15s ease, transform .2s ease;
}

.hp-kb-areas .hp-kb-area:hover {
    border-color: var(--hp-ink);
    transform: translateY(-2px);
}

.hp-kb-area__icon {
    display: grid;
    place-items: center;
    width: 48px;
    height: 48px;
    margin-bottom: 12px;
    border-radius: var(--hp-radius-md);
    background: var(--hp-navy-900);
    color: var(--hp-white);
}

.hp-kb-area__title {
    font-family: var(--hp-font-display);
    font-size: var(--bd-card-size);
    font-weight: var(--bd-heading-weight);
    line-height: var(--bd-card-lh);
    letter-spacing: var(--bd-card-track);
}

.hp-kb-area__text {
    padding-right: 28px;
    font-size: var(--bd-body-size);
    color: var(--hp-ink-muted);
}

.hp-kb-area__arrow {
    position: absolute;
    right: 28px;
    bottom: 26px;
    font-size: var(--bd-lead-size);
    color: var(--hp-coral);
}

@media (max-width: 1100px) {
    .hp-kb-feature,
    .hp-kb-areas,
    .hp-kb-directory {
        padding-block: 64px;
    }

    .hp-kb-areas {
        padding-top: 0;
    }

    .hp-kb-directory {
        padding-top: 40px;
    }

    .hp-kb-areas__grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 720px) {
    .hp-kb-filters__label {
        width: 100%;
    }

    .hp-kb-areas__grid {
        grid-template-columns: minmax(0, 1fr);
    }
}

/* ---- Knowledge Hub landing: three groups ---- */
.hp-kb-group {
    padding-block: 88px;
}

.hp-kb-group + .hp-kb-group {
    padding-top: 0;
}

.hp-kb-glossarystrip {
    display: grid;
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: 40px;
    align-items: start;
    margin-top: 48px;
    padding: 36px;
}

.hp-kb-glossarystrip__intro {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
}

.hp-kb-glossarystrip__title {
    font-family: var(--hp-font-display);
    font-size: var(--bd-h3-size);
    font-weight: var(--bd-heading-weight);
    line-height: var(--bd-h3-lh);
    color: var(--hp-ink);
    letter-spacing: var(--bd-h3-track);
}

.hp-kb-glossarystrip__intro p {
    font-size: var(--bd-body-size);
    color: var(--hp-ink-muted);
}

.hp-kb-glossarystrip__terms {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.hp-kb-glossarystrip .hp-kb-termcard {
    background: var(--hp-paper);
}

/* ---- Glossary directory ---- */
.hp-kb-glossary__bar {
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding-bottom: 28px;
    border-bottom: 1px solid var(--hp-line);
}

.hp-kb-glossary__search {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    max-width: 560px;
    padding: 0 18px;
    border: 1px solid var(--hp-line-strong);
    border-radius: var(--hp-radius-md);
    background: var(--hp-white);
    color: var(--hp-ink-soft);
}

.hp-kb-glossary__search:focus-within {
    border-color: var(--hp-coral);
}

.hp-kb-glossary__input {
    flex: 1;
    min-width: 0;
    height: 52px;
    padding: 0;
    border: 0;
    background: transparent;
    font-family: var(--hp-font-body);
    font-size: var(--bd-body-size);
    color: var(--hp-ink);
}

.hp-kb-glossary__input::placeholder {
    color: var(--hp-ink-soft);
}

.hp-kb-glossary__search .hp-kb-glossary__input:focus-visible {
    outline: 0;
}

.hp-kb-glossary__letters {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.hp-kb-glossary__letters a,
.hp-kb-glossary__letters span {
    display: grid;
    place-items: center;
    width: 36px;
    height: 36px;
    border: 1px solid var(--hp-line-strong);
    border-radius: var(--hp-radius-md);
    background: var(--hp-white);
    font-family: var(--hp-font-mono);
    font-size: var(--bd-small-size);
    font-weight: 600;
    color: var(--hp-ink);
}

.hp-kb-glossary__letters a:hover {
    border-color: var(--hp-ink);
}

.hp-kb-glossary__letters span[aria-disabled],
.hp-kb-glossary__letters a.is-off {
    border-color: var(--hp-line);
    background: transparent;
    color: var(--hp-line-strong);
    pointer-events: none;
}

.hp-kb-glossary__group {
    margin-top: 40px;
    scroll-margin-top: calc(var(--bd4-top, 0px) + 124px);
}

.hp-kb-glossary__group[hidden] {
    display: none;
}

.hp-kb-glossary__letter {
    margin-bottom: 16px;
    font-family: var(--hp-font-display);
    font-size: var(--bd-h3-size);
    font-weight: var(--bd-heading-weight);
    line-height: var(--bd-h3-lh);
    color: var(--hp-coral);
    letter-spacing: var(--bd-h3-track);
}

.hp-kb-glossary__list {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.hp-kb-glossary__empty {
    padding: 48px 0;
    font-size: var(--bd-body-size);
    text-align: center;
    color: var(--hp-ink-muted);
}

@media (max-width: 1100px) {
    .hp-kb-group {
        padding-block: 64px;
    }

    .hp-kb-glossarystrip {
        grid-template-columns: minmax(0, 1fr);
        gap: 28px;
        padding: 28px;
    }

    .hp-kb-glossary__list {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 720px) {
    .hp-kb-glossarystrip {
        padding: 20px;
    }

    .hp-kb-glossarystrip__terms,
    .hp-kb-glossary__list {
        grid-template-columns: minmax(0, 1fr);
    }
}

/* Glossary on wide screens: letter on the left, cards flow beside it */
@media (min-width: 1101px) {
    .hp-kb-glossary__group {
        display: grid;
        grid-template-columns: 72px minmax(0, 1fr);
        column-gap: 24px;
        align-items: start;
        margin-top: 32px;
        padding-top: 32px;
        border-top: 1px solid var(--hp-line);
    }

    .hp-kb-glossary__letter {
        position: sticky;
        top: 124px;
        margin: 0;
    }

    .hp-kb-glossary__list {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    }
}

/* ------------------------------------------------------------ glossary index: sticky A to Z, letter headings */

.hp-kb-glossary__bar {
    position: sticky;
    top: calc(var(--bd4-top, 0px) + 72px);
    z-index: 5;
    margin-inline: -20px;
    padding: 16px 20px;
    background: var(--hp-paper);
    border-bottom: 1px solid var(--hp-line);
}

.hp-kb-glossary__letters {
    gap: 4px;
}

.hp-kb-glossary__letters a,
.hp-kb-glossary__letters span {
    width: 34px;
    height: 34px;
    border-radius: 6px;
}

.hp-kb-glossary__letters a:hover {
    border-color: var(--hp-coral);
    background: var(--hp-coral);
    color: var(--hp-white);
}

.hp-kb-glossary__letter {
    display: flex;
    flex-direction: column;
    gap: 8px;
    align-items: flex-start;
}

.hp-kb-glossary__letterchar {
    display: grid;
    place-items: center;
    width: 56px;
    height: 56px;
    border-radius: 8px;
    background: linear-gradient(135deg, #000313 0%, #11193f 100%);
    font-size: 28px;
    color: var(--hp-white);
}

.hp-kb-glossary__lettern {
    font-family: var(--hp-font-mono);
    font-size: 11px;
    letter-spacing: .06em;
    text-transform: uppercase;
    color: var(--hp-ink-soft);
}

/* Cards in a letter group fill the row, so a group never ends with an empty cell. */
.hp-kb-glossary__list {
    display: flex;
    flex-wrap: wrap;
}

.hp-kb-glossary__list > .hp-kb-termcard {
    flex: 1 1 calc((100% - 32px) / 3);
    min-width: min(100%, 260px);
}

@media (max-width: 1100px) {
    .hp-kb-glossary__list > .hp-kb-termcard {
        flex-basis: calc((100% - 16px) / 2);
    }
}

@media (max-width: 720px) {
    .hp-kb-glossary__list > .hp-kb-termcard {
        flex-basis: 100%;
    }

    .hp-kb-glossary__bar {
        position: static;
        margin-inline: 0;
        padding-inline: 0;
    }

    .hp-kb-glossary__letter {
        flex-direction: row;
        align-items: center;
        gap: 12px;
    }

    .hp-kb-glossary__letterchar {
        width: 44px;
        height: 44px;
        font-size: 22px;
    }
}

/* ------------------------------------------------------------ hub: How to defend band, countries, 9 shelves */

.hp-kb-defendband {
    padding-block: 80px;
    background:
        radial-gradient(60% 80% at 100% 0%, rgb(255 82 71 / .12), transparent 70%),
        radial-gradient(50% 70% at 0% 100%, rgb(36 52 128 / .35), transparent 70%),
        #000313;
}

.hp-kb-defendband__grid {
    display: grid;
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 56px;
    align-items: center;
}

.hp-kb-defendband__copy {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
}

.hp-kb-defendband__areas {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.hp-kb-defendband__area {
    display: flex;
    flex-direction: column;
    gap: 8px;
    height: 100%;
    padding: 22px;
    border: 1px solid rgb(255 255 255 / .12);
    border-radius: 8px;
    background: rgb(255 255 255 / .04);
    color: var(--hp-white);
    text-decoration: none;
    transition: border-color .2s ease, background-color .2s ease;
}

.hp-kb-defendband__area:hover {
    border-color: rgb(255 82 71 / .7);
    background: rgb(255 255 255 / .07);
}

.hp-kb-defendband__area:focus-visible {
    outline: 2px solid var(--hp-coral);
    outline-offset: 3px;
}

.hp-kb-defendband__icon {
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    border: 1px solid rgb(255 255 255 / .2);
    border-radius: 6px;
    background: rgb(0 3 19 / .4);
    color: #ff8a82;
}

.hp-kb-defendband__name {
    font-family: var(--hp-font-display);
    font-size: var(--bd-card-dense-size);
    font-weight: var(--bd-heading-weight);
    line-height: var(--bd-card-lh);
}

.hp-kb-defendband__text {
    font-size: var(--bd-small-size);
    line-height: 1.55;
    color: #dfe3f2;
}

.hp-kb-defendband__n {
    margin-top: auto;
    padding-top: 6px;
    font-family: var(--hp-font-mono);
    font-size: 11px;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: #ffb4ad;
}

/* Countries: twelve flags in rows of 6, 4 or 2, so no row is left short. */
.hp-kb-countries {
    padding-block: 88px 24px;
}

.hp-kb-countries__grid {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 12px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.hp-kb-countries__item {
    display: flex;
    align-items: center;
    gap: 12px;
    height: 100%;
    padding: 14px 16px;
    border: 1px solid var(--hp-line);
    border-radius: 6px;
    background: var(--hp-paper);
    color: var(--hp-ink);
    font-family: var(--hp-font-display);
    font-size: 16px;
    text-decoration: none;
    overflow-wrap: anywhere;
    transition: border-color .2s ease;
}

.hp-kb-countries__item:hover {
    border-color: var(--hp-coral);
}

.hp-kb-countries__item:focus-visible {
    outline: 2px solid var(--hp-coral);
    outline-offset: 2px;
}

.hp-kb-countries__item .hp-kb-flag {
    border-color: var(--hp-line-strong);
}

/* Nine shelves: three columns, so 3 rows of 3. A leftover last card spans the row. */
@media (min-width: 1101px) {
    .hp-kb-shelves--hub .hp-kb-shelves__grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .hp-kb-shelves--hub .hp-kb-shelves__grid > li:last-child:nth-child(4n+3) {
        grid-column: auto;
    }

    .hp-kb-shelves--hub .hp-kb-shelves__grid > li:last-child:nth-child(3n+1) {
        grid-column: 1 / -1;
    }

    .hp-kb-shelves--hub .hp-kb-shelves__grid > li:last-child:nth-child(3n+2) {
        grid-column: span 2;
    }
}

@media (max-width: 1100px) {
    .hp-kb-defendband__grid {
        grid-template-columns: minmax(0, 1fr);
        gap: 32px;
    }

    .hp-kb-defendband {
        padding-block: 64px;
    }

    .hp-kb-countries__grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
}

@media (max-width: 720px) {
    .hp-kb-defendband__areas {
        grid-template-columns: minmax(0, 1fr);
    }

    .hp-kb-countries__grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (prefers-reduced-motion: reduce) {
    .hp-kb-defendband__area,
    .hp-kb-countries__item {
        transition: none;
    }
}

/* Neighbouring bands have different backgrounds, so each gets its own top and bottom space. */
.hp-kb-group.hp-kb-countries,
.hp-kb-group.hp-kb-shelves--hub {
    padding-block: 88px;
}

@media (max-width: 1100px) {
    .hp-kb-group.hp-kb-countries,
    .hp-kb-group.hp-kb-shelves--hub {
        padding-block: 64px;
    }
}

.hp.hp-kb-shelves.hp-kb-shelves--hub {
    padding-block: 80px 72px;
}

@media (max-width: 1100px) {
    .hp.hp-kb-shelves.hp-kb-shelves--hub {
        padding-block: 56px;
    }
}

/* ---- Review fixes (wave 6) ---- */

/* "On this page" bar lines up with the 1280px content column of the sections below it. */
.hp-kb-toc.bd-pg-toc {
    padding-inline: max(32px, calc((100% - var(--hp-max, 1280px)) / 2));
}
@media (max-width: 720px) {
    .hp-kb-toc.bd-pg-toc { padding-inline: 16px; }
}

/* Intro answer under the bar: same measure and type as the section headings, with room above and below. */
.hp-kb-hubintro {
    padding-block: 64px 24px;
}
.hp-kb-hubintro .hp-kb-prose {
    max-width: 860px;
}
.hp-kb-hubintro .hp-kb-prose h2 {
    margin: 0 0 12px;
    font-family: var(--hp-font-display);
    font-size: var(--bd-h3-size, 24px);
    font-weight: var(--bd-heading-weight, 500);
    line-height: var(--bd-h3-lh, 1.25);
    color: var(--hp-ink, #11193f);
    scroll-margin-top: 160px;
}
.hp-kb-hubintro .hp-kb-prose h3 {
    margin: 28px 0 8px;
    font-family: var(--hp-font-display);
    font-size: 20px;
    font-weight: var(--bd-heading-weight, 500);
    line-height: 1.3;
    color: var(--hp-ink, #11193f);
}
.hp-kb-hubintro .hp-kb-prose p {
    margin: 0;
    font-size: 17px;
    line-height: 1.65;
    color: var(--hp-ink-muted, #4b5563);
}
.hp-kb-hubintro .hp-kb-prose p:first-of-type {
    font-size: 17px;
}

/* The "On this page" bar is printed before the hero. Show it right after the hero instead, so it is never
   tucked under the header at the top of the page; it then sticks under the header while scrolling. */
#main:has(> .bd-pg-toc) {
    display: flex;
    flex-direction: column;
}
#main:has(> .bd-pg-toc) > .bd-pg-toc {
    order: 2;
}
#main:has(> .bd-pg-toc) > .hp-main {
    order: 1;
    display: contents;
}
#main:has(> .bd-pg-toc) > .hp-main > .hp-kb-hero {
    order: 1;
}
#main:has(> .bd-pg-toc) > .hp-main > :not(.hp-kb-hero) {
    order: 3;
}
#main:has(> .bd-pg-toc) > :not(.bd-pg-toc):not(.hp-main) {
    order: 4;
}
@media (min-width: 768px) {
    .hp-kb-toc.bd-pg-toc ul { gap: 6px 12px; }
    .hp-kb-toc.bd-pg-toc a { font-size: 12.5px; }
}