/* AI Forward playbook page. Every rule is under .pb-page, so nothing reaches
   the shared nav or footer. */

.pb-page {
  --pb-on-navy: #d5dcf0;
  --pb-on-navy-muted: #a9b6dc;
  --pb-rule: #d8dce7;
  --pb-err: #ff8a7a;
}

.pb-page img {
  border-radius: 0;
}

.pb-page .pb-sr {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.pb-page .pb-cap {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ==================== HERO ==================== */
.pb-page .pb-hero {
  padding: calc(var(--nav-height) + clamp(40px, 6vw, 84px)) 0 clamp(56px, 7vw, 92px);
  overflow: hidden;
  background: var(--navy);
  color: #fff;
}

.pb-page .pb-hero__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 40px 56px;
  align-items: center;
}

.pb-page .pb-hero__text {
  flex: 1 1 520px;
}

.pb-page .pb-crumb {
  margin-bottom: 22px;
  font-size: 14px;
  color: var(--pb-on-navy-muted);
}

.pb-page .pb-crumb a {
  color: var(--pb-on-navy-muted);
}

.pb-page .pb-crumb a:hover {
  color: #fff;
}

.pb-page .pb-hero__eyebrow {
  margin-bottom: 16px;
  color: var(--sky);
}

.pb-page .pb-hero h1 {
  font-size: clamp(34px, 4.6vw, 46px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: #fff;
}

.pb-page .pb-hero__lede {
  max-width: 58ch;
  margin-top: 24px;
  font-size: 19px;
  line-height: 1.6;
  color: var(--pb-on-navy);
}

.pb-page .pb-hero__for {
  max-width: 60ch;
  margin-top: 22px;
  font-size: 15px;
  color: var(--pb-on-navy-muted);
}

.pb-page .pb-hero__btn {
  margin-top: 34px;
}

.pb-page .btn--primary:hover {
  background: var(--blue-hover);
}

/* The cover is a 3D render on a transparent background, so the glow sits
   behind it rather than around a box. */
.pb-page .pb-cover {
  position: relative;
  flex: 0 0 clamp(200px, 28vw, 360px);
  margin-inline: auto;
}

.pb-page .pb-cover::before {
  content: "";
  position: absolute;
  inset: -16% -35%;
  background: radial-gradient(closest-side, rgb(255 255 255 / 35%), rgb(255 255 255 / 0%));
  pointer-events: none;
}

.pb-page .pb-cover img {
  position: relative;
  width: 100%;
  height: auto;
}

/* ==================== BANDS ==================== */
.pb-page .pb-band {
  padding: clamp(60px, 8vw, 88px) 0;
}

.pb-page .pb-band--grey {
  background: var(--cool-grey);
}

.pb-page .pb-band h2 {
  max-width: 30ch;
  margin-bottom: 22px;
  font-size: clamp(28px, 3.2vw, 36px);
  line-height: 1.2;
}

.pb-page .pb-lead {
  max-width: 74ch;
  font-size: 19px;
  color: var(--ink);
}

/* ==================== FACTS ==================== */
.pb-page .pb-facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr));
  gap: 2px;
  margin-top: 44px;
  background: var(--pb-rule);
}

.pb-page .pb-fact {
  padding: 28px 26px;
  background: var(--cool-grey);
}

.pb-page .pb-fact__num {
  font-size: clamp(30px, 3vw, 36px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--navy);
}

.pb-page .pb-fact__label {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.45;
  color: var(--text-muted);
}

.pb-page .pb-source {
  margin-top: 14px;
  font-size: 13px;
  color: var(--text-muted);
}

/* ==================== WHAT YOU GET ==================== */
.pb-page .pb-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
  gap: 22px;
  margin-top: 36px;
}

.pb-page .pb-card {
  padding: 32px 34px 34px;
  border: 1px solid var(--pb-rule);
  border-top: 3px solid var(--navy);
  background: #fff;
}

.pb-page .pb-card .pb-cap {
  color: var(--blue);
}

.pb-page .pb-card h3 {
  margin-top: 14px;
  font-size: 24px;
  line-height: 1.2;
}

.pb-page .pb-card p:last-child {
  margin-top: 16px;
  font-size: 16px;
}

.pb-page .pb-after {
  max-width: 70ch;
  margin-top: 30px;
  font-size: 16.5px;
  color: var(--ink);
}

/* ==================== SECTION INDEX ==================== */
.pb-page .pb-index-tools {
  display: flex;
  justify-content: flex-end;
  margin-top: 28px;
}

.pb-page .pb-index-tools button {
  padding: 0;
  border: 0;
  background: none;
  font: inherit;
  font-size: 14px;
  font-weight: 500;
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 2px;
  cursor: pointer;
}

.pb-page .pb-index-tools button:hover {
  color: var(--navy);
}

.pb-page .pb-index {
  margin-top: 10px;
  border-top: 2px solid var(--navy);
}

.pb-page .pb-index__head,
.pb-page .pb-ix summary {
  display: grid;
  grid-template-columns: 56px minmax(0, 1.1fr) minmax(0, 1fr) 24px;
  gap: 24px;
  align-items: center;
}

.pb-page .pb-index__head {
  padding: 12px 0;
  border-bottom: 1px solid var(--pb-rule);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.pb-page .pb-ix {
  border-bottom: 1px solid var(--pb-rule);
}

.pb-page .pb-ix summary {
  padding: 20px 0;
  list-style: none;
  cursor: pointer;
}

.pb-page .pb-ix summary::-webkit-details-marker {
  display: none;
}

.pb-page .pb-ix summary:hover .pb-ix__area {
  color: var(--blue);
}

.pb-page .pb-ix__num {
  font-size: 14px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--blue);
}

.pb-page .pb-ix__area {
  font-size: 20px;
  font-weight: 600;
  line-height: 1.3;
  color: var(--ink);
  transition: color 0.15s;
}

.pb-page .pb-ix__role {
  font-size: 15px;
  line-height: 1.4;
}

.pb-page .pb-ix__chev {
  justify-self: end;
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--navy);
  border-bottom: 2px solid var(--navy);
  transform: rotate(45deg) translateY(-3px);
  transition: transform 0.2s;
}

.pb-page .pb-ix[open] .pb-ix__chev {
  transform: rotate(225deg) translate(-3px, 0);
}

.pb-page .pb-ix p {
  padding: 0 48px 24px 80px;
  font-size: 16px;
}

/* Below this the four columns cannot fit, so the leader drops under the area
   and the column headings go. */
@media (width < 760px) {
  .pb-page .pb-index__head {
    display: none;
  }

  .pb-page .pb-ix summary {
    grid-template-columns: 36px minmax(0, 1fr) 20px;
    gap: 4px 14px;
  }

  .pb-page .pb-ix__role {
    grid-area: 2 / 2;
    font-size: 14px;
  }

  .pb-page .pb-ix__chev {
    grid-area: 1 / 3 / span 2;
  }

  .pb-page .pb-ix p {
    padding: 0 0 22px 50px;
  }
}

/* ==================== PAGE PREVIEW ==================== */
.pb-page .pb-pages {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 150px), 1fr));
  gap: 22px;
  margin-top: 40px;
}

.pb-page .pb-page-thumb button {
  position: relative;
  display: block;
  width: 100%;
  padding: 0;
  border: 1px solid var(--pb-rule);
  background: #fff;
  box-shadow: 0 1px 2px rgb(17 24 39 / 5%), 0 10px 24px rgb(12 24 64 / 8%);
  cursor: zoom-in;
  transition: transform 0.2s, box-shadow 0.2s;
}

.pb-page .pb-page-thumb button:hover {
  transform: translateY(-3px);
  box-shadow: 0 2px 4px rgb(17 24 39 / 6%), 0 18px 36px rgb(12 24 64 / 14%);
}

.pb-page .pb-page-thumb img {
  width: 100%;
  height: auto;
}

.pb-page .pb-page-thumb__tag {
  position: absolute;
  top: 10px;
  left: 10px;
  padding: 3px 8px;
  border-radius: 2px;
  background: rgb(0 27 107 / 90%);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #fff;
}

.pb-page .pb-page-thumb figcaption {
  margin-top: 12px;
  font-size: 14px;
  line-height: 1.4;
  color: var(--text-muted);
}

.pb-page .pb-page-thumb figcaption b {
  display: block;
  font-weight: 600;
  color: var(--ink);
}

.pb-page .pb-lightbox {
  max-width: 100vw;
  max-height: 100vh;
  margin: auto;
  padding: 0;
  border: 0;
  background: transparent;
  overflow: visible;
}

.pb-page .pb-lightbox::backdrop {
  background: rgb(5 12 40 / 82%);
}

.pb-page .pb-lightbox img {
  width: auto;
  max-width: calc(100vw - 32px);
  max-height: calc(100vh - 80px);
  box-shadow: 0 30px 80px rgb(0 0 0 / 50%);
}

.pb-page .pb-lightbox__close {
  position: fixed;
  top: 20px;
  right: 24px;
  padding: 10px 16px;
  border: 0;
  border-radius: 6px;
  background: #fff;
  font: inherit;
  font-size: 15px;
  font-weight: 600;
  color: var(--navy);
  cursor: pointer;
}

/* ==================== DOWNLOAD ==================== */
.pb-page .pb-cta {
  padding: clamp(60px, 8vw, 88px) 0;
  background: var(--navy);
  color: var(--pb-on-navy);
}

.pb-page .pb-cta__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 380px), 1fr));
  gap: 34px 56px;
  align-items: start;
}

.pb-page .pb-cta h2 {
  margin-bottom: 22px;
  font-size: clamp(28px, 3.2vw, 36px);
  line-height: 1.2;
  color: #fff;
}

/* Intro column only: a rule on every .pb-cta p also enlarged the form's error
   messages and small print. */
.pb-page .pb-cta__text p {
  max-width: 46ch;
  font-size: 16.5px;
}

.pb-page .pb-cta a:not(.btn) {
  color: #fff;
}

.pb-page .pb-cta__cover {
  width: 220px;
  height: auto;
  margin-top: 34px;
}

.pb-page .pb-form__pair {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 200px), 1fr));
  gap: 0 18px;
}

.pb-page .pb-form__row {
  margin-bottom: 18px;
}

.pb-page .pb-form label {
  display: block;
  margin-bottom: 8px;
  font-size: 13px;
  font-weight: 600;
  color: #fff;
}

/* Required marker and error colours match the FOI forms on the same navy. */
.pb-page .pb-form label i {
  font-style: normal;
  color: var(--pb-err);
}

.pb-page .pb-form input:not([type="checkbox"]) {
  width: 100%;
  padding: 13px 14px;
  border: 1px solid #6e8be0;
  border-radius: 8px;
  background: #0a2478;
  font: inherit;
  font-size: 15px;
  color: #fff;
}

.pb-page .pb-form input::placeholder {
  color: #8da0d4;
}

.pb-page .pb-form input:focus-visible,
.pb-page .pb-form button:focus-visible,
.pb-page .pb-done a:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 2px;
}

.pb-page .pb-form input[aria-invalid="true"] {
  border-color: var(--pb-err);
}

.pb-page .pb-form__err {
  display: none;
  margin-top: 7px;
  font-size: 12.5px;
  color: var(--pb-err);
}

.pb-page .pb-form input[aria-invalid="true"] + .pb-form__err,
.pb-page .pb-form__check:has(input[aria-invalid="true"]) + .pb-form__err {
  display: block;
}

.pb-page .pb-form__fail:not([hidden]) {
  display: block;
  margin-top: 14px;
}

.pb-page .pb-form__consent {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 6px 0 20px;
}

.pb-page .pb-form__consent .pb-form__err {
  margin: -4px 0 0 32px;
}

.pb-page .pb-form .pb-form__fine,
.pb-page .pb-done .pb-form__fine {
  max-width: none;
  font-size: 12.5px;
  color: #c4cde8;
}

.pb-page .pb-form .pb-form__check {
  display: grid;
  grid-template-columns: 20px 1fr;
  gap: 12px;
  align-items: start;
  margin: 0;
  font-size: 14px;
  font-weight: 500;
  line-height: 1.45;
  cursor: pointer;
}

.pb-page .pb-form__check input {
  width: 20px;
  height: 20px;
  margin-top: 1px;
  accent-color: var(--sky);
  cursor: pointer;
}

.pb-page .pb-form__check input[aria-invalid="true"] {
  outline: 2px solid var(--pb-err);
  outline-offset: 2px;
}

.pb-page .pb-form__submit {
  width: 100%;
  padding: 15px 18px;
  border: 0;
  border-radius: 6px;
  background: var(--blue);
  font: inherit;
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  cursor: pointer;
}

.pb-page .pb-form__submit:hover {
  background: var(--blue-hover);
}

.pb-page .pb-form__submit:disabled {
  cursor: progress;
  opacity: 0.7;
}

.pb-page .pb-done h3:focus {
  outline: none;
}

.pb-page .pb-done h3 {
  margin-bottom: 14px;
  font-size: 28px;
  color: #fff;
}

.pb-page .pb-done p {
  max-width: none;
}

.pb-page .pb-done__download {
  margin-top: 24px;
}

.pb-page .pb-done__next {
  margin-top: 34px;
  padding-top: 28px;
  border-top: 1px solid rgb(255 255 255 / 18%);
}

.pb-page .pb-done__next .pb-cap {
  margin-bottom: 12px;
  color: var(--sky);
}

@media (prefers-reduced-motion: reduce) {
  .pb-page .pb-page-thumb button,
  .pb-page .pb-ix__chev,
  .pb-page .pb-ix__area {
    transition: none;
  }

  .pb-page .pb-page-thumb button:hover {
    transform: none;
  }
}