:root {
  --kni-purple: #7851A9;
  --kni-lavender: #CCCCFF;
  --kni-silver: #C0C0C0;
  --kni-gold: #D4AF37;
  --kni-ink: #17131d;
  --kni-muted: #625b68;
  --kni-border: #e4dfea;
  --kni-surface: #ffffff;
  --kni-soft: #f7f4fa;
}

.kni-book-store,
.kni-book-single {
  color: var(--kni-ink);
}

.kni-book-store {
  max-width: 1180px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

.kni-book-store__intro {
  max-width: 760px;
  margin-bottom: 1.5rem;
}

.kni-book-store__eyebrow {
  margin: 0 0 .4rem;
  color: var(--kni-purple);
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  font-size: .78rem;
}

.kni-book-store__intro h2,
.kni-book-single h1 {
  margin: 0 0 .65rem;
  line-height: 1.08;
}

.kni-book-store__filters {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) minmax(190px, 260px) auto auto;
  gap: .8rem;
  align-items: end;
  padding: 1rem;
  margin: 0 0 2rem;
  border: 1px solid var(--kni-border);
  border-radius: 14px;
  background: var(--kni-soft);
}

.kni-book-store__filters label {
  display: grid;
  gap: .35rem;
  font-size: .84rem;
  font-weight: 650;
}

.kni-book-store__filters input,
.kni-book-store__filters select {
  width: 100%;
  min-height: 44px;
  padding: .65rem .75rem;
  border: 1px solid #cfc6d8;
  border-radius: 8px;
  background: #fff;
  color: var(--kni-ink);
}

.kni-book-store__filters button,
.kni-book-card__button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: .65rem 1rem;
  border: 1px solid var(--kni-purple);
  border-radius: 8px;
  background: var(--kni-purple);
  color: #fff !important;
  text-decoration: none !important;
  font-weight: 700;
  cursor: pointer;
}

.kni-book-card__button.is-secondary {
  background: transparent;
  color: var(--kni-purple) !important;
}

.kni-book-store__clear {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  padding: 0 .4rem;
}

.kni-book-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.35rem;
}

.kni-book-card {
  display: grid;
  grid-template-rows: auto 1fr;
  overflow: hidden;
  border: 1px solid var(--kni-border);
  border-radius: 16px;
  background: var(--kni-surface);
  box-shadow: 0 8px 28px rgba(36, 23, 48, .07);
}

.kni-book-card__cover {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 320px;
  padding: 1.35rem;
  background: linear-gradient(145deg, #f5f1f8, #ebe6f1);
}

.kni-book-card__cover img {
  display: block;
  width: auto;
  max-width: 100%;
  height: 300px;
  object-fit: contain;
  box-shadow: 0 10px 22px rgba(0, 0, 0, .18);
}

.kni-book-card__placeholder {
  width: 180px;
  aspect-ratio: 2 / 3;
  display: grid;
  place-items: center;
  border-radius: 4px;
  background: var(--kni-purple);
  color: #fff;
  font-size: 4rem;
  font-weight: 800;
}

.kni-book-card__body {
  display: flex;
  flex-direction: column;
  padding: 1.2rem;
}

.kni-book-card__meta-row,
.kni-book-single__badges {
  display: flex;
  align-items: center;
  gap: .5rem;
  flex-wrap: wrap;
  margin-bottom: .7rem;
}

.kni-book-card__badge,
.kni-book-card__topic {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: .2rem .55rem;
  border-radius: 999px;
  font-size: .72rem;
  font-weight: 750;
}

.kni-book-card__badge {
  background: var(--kni-purple);
  color: #fff;
}

.kni-book-card__topic {
  background: #efeafd;
  color: #513476;
}

.kni-book-card h3 {
  margin: 0 0 .45rem;
  font-size: 1.22rem;
  line-height: 1.25;
}

.kni-book-card h3 a {
  color: inherit;
  text-decoration: none;
}

.kni-book-card__subtitle {
  margin: 0 0 .5rem;
  font-weight: 650;
}

.kni-book-card__authors {
  margin: 0 0 .75rem;
  color: var(--kni-purple);
  font-size: .92rem;
  font-weight: 650;
}

.kni-book-card__excerpt {
  margin: 0 0 1rem;
  color: var(--kni-muted);
  line-height: 1.55;
}

.kni-book-card__actions {
  display: flex;
  align-items: center;
  gap: .8rem;
  flex-wrap: wrap;
  margin-top: auto;
}

.kni-book-card__details {
  font-weight: 650;
}

.kni-book-store__empty {
  padding: 2rem;
  border: 1px dashed var(--kni-border);
  border-radius: 12px;
  text-align: center;
}

.kni-book-single {
  padding: 1.5rem 1.25rem 4rem;
}

.kni-book-single__wrap {
  max-width: 1120px;
  margin: 0 auto;
}

.kni-book-single__breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
  margin-bottom: 1.5rem;
  color: var(--kni-muted);
  font-size: .9rem;
}

.kni-book-single__hero {
  display: grid;
  grid-template-columns: minmax(240px, 360px) 1fr;
  gap: 3rem;
  align-items: start;
  padding: 2rem;
  border: 1px solid var(--kni-border);
  border-radius: 20px;
  background: linear-gradient(140deg, #faf8fc, #f1ecf7);
}

.kni-book-single__cover {
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

.kni-book-single__cover img,
.kni-book-single__cover-image {
  display: block;
  width: auto;
  max-width: 100%;
  max-height: 520px;
  height: auto;
  object-fit: contain;
  box-shadow: 0 16px 38px rgba(0,0,0,.18);
}

.kni-book-single__actions .kni-book-card__button {
  min-width: 180px;
  padding: .8rem 1.15rem;
}

.kni-book-card__button.is-amazon {
  background: var(--kni-purple);
  border-color: var(--kni-purple);
  color: #fff !important;
}

.kni-book-single__subtitle {
  margin: 0 0 .75rem;
  font-size: 1.2rem;
  font-weight: 650;
}

.kni-book-single__authors {
  margin: 0 0 1rem;
  color: var(--kni-purple);
  font-weight: 700;
}

.kni-book-single__lead {
  font-size: 1.05rem;
  line-height: 1.65;
}

.kni-book-single__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin: 1.2rem 0;
}

.kni-book-single__facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: .7rem;
  margin: 1.4rem 0 0;
}

.kni-book-single__facts div {
  padding: .75rem;
  border: 1px solid var(--kni-border);
  border-radius: 10px;
  background: #fff;
}

.kni-book-single__facts dt {
  font-size: .72rem;
  font-weight: 750;
  text-transform: uppercase;
  color: var(--kni-muted);
}

.kni-book-single__facts dd {
  margin: .2rem 0 0;
}

.kni-book-single__content {
  max-width: 820px;
  margin: 2.5rem auto 0;
  line-height: 1.7;
}

.kni-book-single__back {
  max-width: 820px;
  margin: 2rem auto 0;
}

@media (max-width: 900px) {
  .kni-book-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .kni-book-store__filters { grid-template-columns: 1fr 1fr; }
  .kni-book-single__hero { grid-template-columns: 280px 1fr; gap: 1.7rem; }
}

@media (max-width: 640px) {
  .kni-book-grid { grid-template-columns: 1fr; }
  .kni-book-store__filters { grid-template-columns: 1fr; }
  .kni-book-single__hero { grid-template-columns: 1fr; padding: 1.25rem; }
  .kni-book-single__cover { max-width: 300px; margin: 0 auto; }
  .kni-book-single__facts { grid-template-columns: 1fr; }
}

.kni-book-store-page-hero {
  position: relative;
  margin: -2rem calc(50% - 50vw) 2rem;
  padding: 5.5rem 1.25rem 5rem;
  background: radial-gradient(circle at 80% 25%, rgba(204,204,255,.22), transparent 28%), linear-gradient(115deg, #090720, #27134f 64%, #5a2b83);
  color: #fff;
}

.kni-book-store-page-hero__inner,
.kni-book-store-page-footer > div {
  width: min(1180px, calc(100% - 2.5rem));
  margin: 0 auto;
}

.kni-book-store-page-hero__eyebrow,
.kni-book-store-page-footer__eyebrow {
  margin: 0 0 .65rem;
  color: var(--kni-gold);
  font-weight: 800;
  letter-spacing: .09em;
  text-transform: uppercase;
  font-size: .78rem;
}

.kni-book-store-page-hero h1 {
  margin: 0 0 1rem;
  color: #fff;
  font-size: clamp(3rem, 6vw, 5.6rem);
  line-height: .98;
}

.kni-book-store-page-hero p:last-child {
  max-width: 760px;
  margin: 0;
  color: #f0ebf5;
  font-size: 1.12rem;
  line-height: 1.65;
}

.kni-book-store-page-footer {
  margin: 2rem calc(50% - 50vw) -2rem;
  padding: 4rem 1.25rem;
  background: #171026;
  color: #fff;
}

.kni-book-store-page-footer h2 {
  margin: 0 0 .8rem;
  color: #fff;
}

.kni-book-store-page-footer p {
  max-width: 820px;
  line-height: 1.65;
}

.kni-book-store-page-footer__button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin: .5rem .5rem 0 0;
  padding: .72rem 1rem;
  border: 1px solid var(--kni-lavender);
  border-radius: 8px;
  background: var(--kni-purple);
  color: #fff !important;
  text-decoration: none !important;
  font-weight: 700;
}

.kni-book-store-page-footer__button.is-secondary {
  background: transparent;
}

@media (max-width: 920px) {
  .kni-book-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .kni-book-store__filters {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 620px) {
  .kni-book-grid,
  .kni-book-store__filters,
  .kni-book-single__hero {
    grid-template-columns: 1fr;
  }
  .kni-book-store-page-hero {
    padding-top: 4rem;
  }
  .kni-book-single__facts {
    grid-template-columns: 1fr;
  }
}


/* v1.3 publication/status and Amazon presentation */
.kni-book-card__badge.is-coming-soon {
  background: #D4AF37;
  color: #111;
}

.kni-amazon-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: auto;
  max-width: 170px;
  line-height: 0;
  text-decoration: none !important;
}

.kni-amazon-button img {
  display: block;
  width: 150px;
  max-width: 100%;
  height: auto;
  border: 0;
  box-shadow: none;
}

.kni-book-single__actions .kni-amazon-button {
  min-width: 0;
  padding: 0;
}

/* Preferred Knoco Institute Book Store hero treatment. */
.kni-book-feature-hero {
  position:relative;
  left:50%;
  width:100vw;
  margin-left:-50vw;
  overflow:hidden;
  background:
    radial-gradient(circle at 85% 28%, rgba(120,81,169,.36), transparent 30%),
    radial-gradient(circle at 72% 72%, rgba(204,204,255,.09), transparent 30%),
    linear-gradient(112deg,#090720 0%,#190b3b 53%,#5a2c86 100%);
  color:#fff;
  border-top:2px solid #D4AF37;
}
.kni-book-feature-hero:after {
  content:"";
  position:absolute;
  right:-110px;
  top:-170px;
  width:520px;
  height:520px;
  border:1px solid rgba(204,204,255,.12);
  border-radius:50%;
  pointer-events:none;
}
.kni-book-feature-hero__inner {
  position:relative;
  z-index:1;
  width:min(1160px,calc(100% - 48px));
  margin:0 auto;
  padding:86px 0 92px;
  display:grid;
  grid-template-columns:minmax(0,1.25fr) minmax(320px,.7fr);
  gap:70px;
  align-items:center;
}
.kni-book-feature-hero__eyebrow {
  margin:0 0 14px;
  color:#D4AF37;
  font-size:.78rem;
  font-weight:850;
  letter-spacing:.1em;
  text-transform:uppercase;
}
.kni-book-feature-hero h1 {
  margin:0 0 22px;
  max-width:740px;
  color:#fff;
  font-family:Georgia,"Times New Roman",serif;
  font-size:clamp(3.6rem,6vw,6rem);
  line-height:.98;
}
.kni-book-feature-hero h1 span { color:#F3C64E; }
.kni-book-feature-hero__lead {
  max-width:760px;
  margin:0;
  color:#f2edf6;
  font-size:1.08rem;
  line-height:1.7;
}
.kni-book-feature-hero__card {
  padding:34px 30px;
  border:1px solid rgba(255,255,255,.2);
  border-radius:12px;
  background:rgba(255,255,255,.10);
  box-shadow:0 18px 44px rgba(0,0,0,.12);
  backdrop-filter:blur(5px);
}
.kni-book-feature-hero__card h2 {
  margin:0 0 14px;
  color:#F3C64E;
  font-family:Georgia,"Times New Roman",serif;
  font-size:1.7rem;
}
.kni-book-feature-hero__card p {margin:0;color:#f1ebf5;line-height:1.65}
.kni-book-feature-strip {
  position:relative;
  left:50%;
  width:100vw;
  margin-left:-50vw;
  background:#d9d0f3;
  color:#211632;
}
.kni-book-feature-strip__inner {
  width:min(1160px,calc(100% - 48px));
  margin:0 auto;
  padding:22px 0;
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
  text-align:center;
  font-weight:800;
}
@media(max-width:900px){.kni-book-feature-hero__inner{grid-template-columns:1fr;gap:34px;padding:64px 0 68px}}
@media(max-width:640px){.kni-book-feature-hero__inner,.kni-book-feature-strip__inner{width:calc(100% - 28px)}.kni-book-feature-strip__inner{grid-template-columns:1fr;gap:10px}.kni-book-feature-hero h1{font-size:3.15rem}}


/* v1.4 bibliographic and order-request presentation */
.kni-book-card__bibliography {
  margin: -.3rem 0 1rem;
  color: var(--kni-muted);
  font-size: .82rem;
  font-weight: 650;
}

.kni-book-request-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: .65rem .9rem;
  border-radius: 8px;
  text-decoration: none !important;
  font-weight: 750;
  line-height: 1.2;
}

.kni-book-request-button.is-email {
  border: 1px solid var(--kni-purple);
  background: var(--kni-purple);
  color: #fff !important;
}

.kni-book-request-button.is-whatsapp {
  border: 1px solid #1fa855;
  background: #25D366;
  color: #102217 !important;
}

.kni-book-request-button:hover,
.kni-book-request-button:focus {
  filter: brightness(.96);
  text-decoration: none !important;
}

.kni-book-single__facts {
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}


/* v1.4.1 - ensure bibliographic facts remain black on light metadata cards. */
.kni-book-single__facts,
.kni-book-single__facts div,
.kni-book-single__facts dt,
.kni-book-single__facts dd {
  color: #000 !important;
}

.kni-book-single__facts dt {
  font-weight: 800;
}

.kni-book-single__facts dd {
  font-weight: 500;
}

/* v1.4.2 Amazon button interaction hardening */
.kni-amazon-button {
  position: relative;
  z-index: 20;
  pointer-events: auto !important;
  cursor: pointer !important;
}
.kni-amazon-button img {
  pointer-events: none !important;
  cursor: pointer !important;
}

/* v1.5.0 - concise Book Store archive cards */
.kni-book-card__subtitle,
.kni-book-card__excerpt,
.kni-book-card__bibliography {
  display: none !important;
}

.kni-book-card__body {
  gap: 0;
}

.kni-book-card__authors {
  margin: 0 0 1rem;
  color: #2a1f33;
  font-size: .94rem;
  font-weight: 650;
  line-height: 1.45;
}

.kni-book-card__actions {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: .75rem 1rem;
  margin-top: auto;
  padding-top: .35rem;
}

.kni-book-card__primary-action {
  min-width: 0;
}

.kni-book-card__details {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  white-space: nowrap;
  color: var(--kni-purple);
  text-decoration: none;
  font-weight: 750;
}

.kni-book-card__details:hover,
.kni-book-card__details:focus {
  text-decoration: underline;
}

.kni-book-card__topic {
  white-space: normal;
}

.kni-book-request-button.is-whatsapp {
  gap: .48rem;
}

.kni-whatsapp-icon {
  width: 1.15rem;
  height: 1.15rem;
  flex: 0 0 auto;
}

@media (max-width: 520px) {
  .kni-book-card__actions {
    grid-template-columns: 1fr;
    align-items: start;
  }
}