/* ========== DMEX AI ChatBook Product Detail — Document + Conversation ========== */

.bk-page {
  --bk-ink: #151B2E;
  --bk-muted: #5B647A;
  --bk-line: #E6E9F2;
  --bk-soft: #F7F8FC;
  --bk-cyan: #98FFFF;
  --bk-blue: #6471F6;
  background: #fff;
  color: var(--bk-ink);
  overflow-x: clip;
}

.bk-page .bk-section--tight.v2-section {
  padding-top: 7.2rem;
  padding-bottom: 7.2rem;
}

.bk-section--soft {
  background: var(--bk-soft);
  border-top: 1px solid var(--bk-line);
}

.bk-section + .bk-section--soft,
.bk-section--soft + .bk-section {
  border-top: 1px solid var(--bk-line);
}

.bk-page [data-reveal] {
  opacity: 0;
  transform: translateY(1.6rem);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.bk-page [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ----- Hero ----- */
.bk-hero {
  position: relative;
  margin-top: -15.2rem;
  padding: 18rem 0 6.4rem;
  background:
    radial-gradient(ellipse 50% 45% at 78% 30%, rgba(100, 113, 246, 0.26), transparent 58%),
    radial-gradient(ellipse 35% 30% at 18% 70%, rgba(152, 255, 255, 0.1), transparent 50%),
    linear-gradient(165deg, #0F172A 0%, var(--pilot-navy) 48%, #121A31 100%);
  color: var(--pilot-text);
  overflow: hidden;
}

.bk-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: 2.4rem;
  align-items: center;
}

.bk-hero__copy .dmex-hero__title {
  color: #fff;
}

.bk-hero__stage {
  display: grid;
  grid-template-columns: 0.7fr 1.05fr 1.15fr;
  gap: 1rem;
  align-items: end;
  min-height: 42rem;
}

.bk-panel {
  margin: 0;
  position: relative;
  border-radius: 1.6rem;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 1.8rem 4rem rgba(0, 0, 0, 0.35);
  background: #121621;
}

.bk-panel img {
  display: block;
  width: 100%;
  height: auto;
}

.bk-panel span {
  position: absolute;
  left: 1rem;
  bottom: 1rem;
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.78);
  color: #E8ECF8;
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: 0.03em;
}

.bk-panel.is-lib {
  transform: translateY(2.4rem);
  opacity: 0.92;
}

.bk-panel.is-chat {
  transform: translateY(0.8rem);
  z-index: 2;
}

.bk-panel.is-doc {
  z-index: 1;
}

/* ----- Before / After ----- */
.bk-ba {
  margin-top: 3.6rem;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 1.6rem;
  align-items: stretch;
}

.bk-ba__before,
.bk-ba__after {
  padding: 2.4rem;
  border-radius: 2rem;
  border: 1px solid var(--bk-line);
  background: #fff;
  display: grid;
  gap: 1rem;
  align-content: start;
}

.bk-ba__after {
  background: linear-gradient(145deg, #19233F, #243156);
  border-color: transparent;
  color: #fff;
}

.bk-ba p {
  margin: 0;
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--bk-blue);
}

.bk-ba__after p {
  color: var(--bk-cyan);
}

.bk-ba strong {
  font-size: 2rem;
  line-height: 1.35;
  word-break: keep-all;
}

.bk-ba ol {
  margin: 0.6rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.7rem;
}

.bk-ba li {
  position: relative;
  padding-left: 1.4rem;
  font-size: 1.4rem;
  color: var(--bk-muted);
  word-break: keep-all;
}

.bk-ba__after li {
  color: rgba(232, 236, 248, 0.78);
}

.bk-ba li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7rem;
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--bk-blue);
}

.bk-ba__after li::before {
  background: var(--bk-cyan);
}

.bk-ba__arrow {
  width: 2.8rem;
  align-self: center;
  height: 1px;
  background: linear-gradient(90deg, rgba(100, 113, 246, 0.2), rgba(100, 113, 246, 0.8));
  position: relative;
}

.bk-ba__arrow::after {
  content: "";
  position: absolute;
  right: -0.2rem;
  top: -0.35rem;
  border: 0.4rem solid transparent;
  border-left-color: var(--bk-blue);
}

/* ----- Signature ----- */
.bk-sig {
  margin-top: 3.6rem;
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: 2.4rem;
}

.bk-sig__rail {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.8rem;
}

.bk-sig__rail li {
  display: grid;
  grid-template-columns: 3.2rem 1fr;
  grid-template-rows: auto auto;
  column-gap: 1rem;
  row-gap: 0.25rem;
  padding: 1.4rem 1.6rem;
  border-radius: 1.6rem;
  border: 1px solid var(--bk-line);
  background: #fff;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.bk-sig__rail li.is-on {
  border-color: rgba(100, 113, 246, 0.45);
  background: linear-gradient(135deg, rgba(100, 113, 246, 0.08), #fff);
  box-shadow: 0 1.2rem 2.8rem rgba(25, 35, 63, 0.08);
}

.bk-sig__rail em {
  grid-row: 1 / span 2;
  align-self: center;
  font-style: normal;
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--bk-blue);
}

.bk-sig__rail strong {
  font-size: 1.45rem;
  letter-spacing: 0.04em;
}

.bk-sig__rail span {
  font-size: 1.25rem;
  color: var(--bk-muted);
}

.bk-sig__stage {
  min-height: 32rem;
  border-radius: 2.4rem;
  padding: 3.2rem;
  background:
    radial-gradient(ellipse 50% 40% at 80% 12%, rgba(100, 113, 246, 0.18), transparent 55%),
    linear-gradient(165deg, #0F172A, #19233F);
  color: #fff;
}

.bk-sig__panel {
  display: grid;
  gap: 1.4rem;
  align-content: start;
}

.bk-sig__panel[hidden] {
  display: none !important;
}

.bk-sig__label {
  margin: 0;
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--bk-cyan);
  letter-spacing: 0.04em;
}

.bk-sig__panel > strong {
  font-size: 2.4rem;
  line-height: 1.35;
  word-break: keep-all;
}

.bk-sig__doc,
.bk-sig__q,
.bk-sig__a {
  padding: 1.6rem 1.8rem;
  border-radius: 1.4rem;
  font-size: 1.5rem;
  line-height: 1.55;
  word-break: keep-all;
}

.bk-sig__doc {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.bk-sig__doc span {
  display: block;
  margin-bottom: 0.6rem;
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--bk-cyan);
}

.bk-sig__doc p {
  margin: 0;
  color: rgba(232, 236, 248, 0.85);
}

.bk-sig__q {
  background: rgba(100, 113, 246, 0.25);
  border: 1px solid rgba(100, 113, 246, 0.4);
}

.bk-sig__a {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.bk-sig__loop {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.8rem;
}

.bk-sig__loop span {
  padding: 0.8rem 1.1rem;
  border-radius: 1rem;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.05);
  font-size: 1.2rem;
  font-weight: 800;
}

.bk-sig__loop span.is-peak {
  background: rgba(152, 255, 255, 0.14);
  border-color: rgba(152, 255, 255, 0.35);
  color: var(--bk-cyan);
}

.bk-sig__loop em {
  font-style: normal;
  color: rgba(232, 236, 248, 0.55);
  font-weight: 800;
}

.bk-sig__note {
  margin: 0;
  font-size: 1.35rem;
  color: rgba(232, 236, 248, 0.72);
  word-break: keep-all;
}

/* ----- Together / Proof ----- */
.bk-together {
  margin-top: 3.6rem;
  display: grid;
  gap: 1.6rem;
}

.bk-together__legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--bk-muted);
}

.bk-together__legend li {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
}

.bk-together__legend em {
  width: 0.9rem;
  height: 0.9rem;
  border-radius: 0.25rem;
  background: var(--bk-blue);
}

.bk-together__legend li:nth-child(2) em {
  background: #3B4F9A;
}

.bk-together__legend li:nth-child(3) em {
  background: #1F8A5B;
}

.bk-together__shot {
  margin: 0;
  border-radius: 2rem;
  overflow: hidden;
  border: 1px solid var(--bk-line);
  background: #121621;
  box-shadow: 0 2.4rem 5.6rem rgba(15, 23, 42, 0.16);
}

.bk-together__shot img {
  display: block;
  width: 100%;
  height: auto;
}

/* ----- Library ----- */
.bk-lib {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
  gap: 3.2rem;
  align-items: center;
}

.bk-lib__shot {
  margin: 0;
  max-width: 28rem;
  justify-self: end;
  border-radius: 2rem;
  overflow: hidden;
  border: 1px solid var(--bk-line);
  box-shadow: 0 1.8rem 4rem rgba(15, 23, 42, 0.14);
  background: #121621;
}

.bk-lib__shot img {
  display: block;
  width: 100%;
  height: auto;
}

/* ----- Use Cases ----- */
.bk-use {
  margin-top: 3.6rem;
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 1.2rem;
}

.bk-use__item {
  padding: 2.4rem;
  border-radius: 2rem;
  border: 1px solid var(--bk-line);
  background: #fff;
  display: grid;
  gap: 1rem;
  align-content: start;
}

.bk-use__item.is-focus {
  background: linear-gradient(160deg, #19233F, #243156);
  border-color: transparent;
  color: #fff;
  min-height: 26rem;
}

.bk-use__item > p {
  margin: 0;
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--bk-blue);
}

.bk-use__item.is-focus > p {
  color: var(--bk-cyan);
}

.bk-use__item strong {
  font-size: 1.85rem;
  line-height: 1.4;
  word-break: keep-all;
}

.bk-use__q {
  margin-top: auto;
  padding: 1.2rem 1.4rem;
  border-radius: 1.2rem;
  background: rgba(100, 113, 246, 0.08);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--bk-ink);
  word-break: keep-all;
}

.bk-use__item.is-focus .bk-use__q {
  background: rgba(255, 255, 255, 0.08);
  color: #EEF1FF;
}

.bk-diff {
  margin: 2.8rem 0 0;
  padding: 1.8rem 2rem;
  border-radius: 1.6rem;
  background: var(--bk-soft);
  border: 1px solid var(--bk-line);
  font-size: 1.4rem;
  color: var(--bk-muted);
  word-break: keep-all;
  line-height: 1.55;
}

.bk-diff strong {
  color: var(--bk-ink);
}

/* ----- B2B ----- */
.bk-biz {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 3.2rem;
  align-items: center;
}

.bk-biz__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2.4rem;
}

.bk-biz__cta .btn-ghost-pilot.is-dark {
  color: var(--pilot-navy);
  border-color: rgba(25, 35, 63, 0.2);
}

.bk-biz__diagram {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 3.2rem 2.4rem;
  border-radius: 2.4rem;
  background:
    radial-gradient(ellipse 50% 60% at 70% 30%, rgba(100, 113, 246, 0.2), transparent 55%),
    linear-gradient(145deg, #0F172A, #19233F);
}

.bk-biz__diagram span {
  padding: 1.1rem 1.4rem;
  border-radius: 1.2rem;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.06);
  color: #E8ECF8;
  font-size: 1.35rem;
  font-weight: 800;
}

.bk-biz__diagram span.is-peak {
  background: rgba(152, 255, 255, 0.14);
  border-color: rgba(152, 255, 255, 0.35);
  color: var(--bk-cyan);
}

.bk-biz__diagram em {
  width: 2.4rem;
  height: 1px;
  background: linear-gradient(90deg, rgba(152, 255, 255, 0.1), rgba(152, 255, 255, 0.55));
}

/* ----- Family ----- */
.bk-family {
  list-style: none;
  margin: 3.6rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.2rem;
}

.bk-family li {
  padding: 2.2rem;
  border-radius: 1.8rem;
  border: 1px solid var(--bk-line);
  background: #fff;
  display: grid;
  gap: 0.8rem;
  align-content: start;
}

.bk-family p {
  margin: 0;
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--bk-blue);
}

.bk-family strong {
  font-size: 1.55rem;
  line-height: 1.4;
  word-break: keep-all;
}

.bk-family a {
  margin-top: 0.4rem;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--pilot-navy);
  text-decoration: none;
}

.bk-family a:hover {
  color: var(--bk-blue);
}

.bk-family__soon {
  margin-top: 0.4rem;
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--bk-muted);
}

/* ----- Responsive ----- */
@media (max-width: 1100px) {
  .bk-hero__grid,
  .bk-sig,
  .bk-lib,
  .bk-biz {
    grid-template-columns: 1fr;
  }

  .bk-hero__stage {
    grid-template-columns: 1fr 1.1fr;
    min-height: 0;
  }

  .bk-panel.is-lib {
    display: none;
  }

  .bk-panel.is-chat,
  .bk-panel.is-doc {
    transform: none;
  }

  .bk-ba {
    grid-template-columns: 1fr;
  }

  .bk-ba__arrow {
    width: 1px;
    height: 2.4rem;
    justify-self: center;
    background: linear-gradient(180deg, rgba(100, 113, 246, 0.2), rgba(100, 113, 246, 0.8));
  }

  .bk-ba__arrow::after {
    right: auto;
    left: -0.35rem;
    top: auto;
    bottom: -0.2rem;
    border-left-color: transparent;
    border-top-color: var(--bk-blue);
  }

  .bk-use {
    grid-template-columns: 1fr;
  }

  .bk-use__item.is-focus {
    min-height: 0;
  }

  .bk-family {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .bk-lib__shot {
    justify-self: start;
  }
}

@media (max-width: 760px) {
  .bk-hero {
    margin-top: -7.2rem;
    padding: 10.8rem 0 5.2rem;
  }

  .bk-page .bk-section--tight.v2-section {
    padding-top: 5.6rem;
    padding-bottom: 5.6rem;
  }

  .bk-hero__stage {
    grid-template-columns: 1fr;
  }

  .bk-panel.is-doc {
    display: none;
  }

  .bk-sig__stage {
    min-height: 0;
    padding: 2.4rem 2rem;
  }

  .bk-sig__panel > strong {
    font-size: 2rem;
  }

  .bk-family {
    grid-template-columns: 1fr;
  }

  .bk-biz__cta {
    flex-direction: column;
    align-items: stretch;
  }

  .bk-biz__cta .btn-base,
  .bk-biz__cta .btn-ghost-pilot {
    width: 100%;
    justify-content: center;
    text-align: center;
  }

  .bk-together__shot {
    border-radius: 1.4rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .bk-page [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* Mobile drawer overflow fix */
html:has(main.bk-page) .header-m {
  right: 0;
  width: 0;
  overflow: hidden;
  transform: none;
  transition: width 0.2s ease-in;
  pointer-events: none;
}

html:has(main.bk-page)[data-nav="open"] .header-m {
  width: min(28.8rem, 100vw);
  pointer-events: auto;
}

html:has(main.bk-page) .header-m-wrap {
  width: min(28.8rem, 100vw);
  min-width: min(28.8rem, 100vw);
  box-sizing: border-box;
}

html:has(main.bk-page) .header-m-scroll {
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
}

html:has(main.bk-page) .header-m .header-language {
  transform: none;
  max-width: 100%;
}