.site-description,
.wp-block-site-tagline,
.site-tagline {
  text-align: center;
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.35;
  white-space: normal;
  font-size: 0;
}

.site-description::before,
.wp-block-site-tagline::before,
.site-tagline::before {
  content: "The Visual Dimensions of Art, Science and Technology";
  display: block;
  font-size: 22px;
  line-height: 1.35;
}

.site-description::after,
.wp-block-site-tagline::after,
.site-tagline::after {
  content: "Exploring perspective as a major field of visual, spatial, optical, and representational knowledge — connecting art, science, geometry, vision, architecture, photography, cinema, digital imaging, and spatial theory.";
  display: block;
  font-size: 19px;
  line-height: 1.45;
  max-width: 900px;
  margin: 14px auto 0 auto;
}

@media (max-width: 600px) {
  .site-description::after,
  .wp-block-site-tagline::after,
  .site-tagline::after {
    font-size: 16px;
    line-height: 1.4;
    max-width: 92%;
  }
}
.prc-sidebar-books {
    font-size: 15px;
    line-height: 1.45;
}

.prc-sidebar-books h3 {
    font-size: 24px;
    line-height: 1.2;
    margin: 0 0 14px 0;
}

.prc-sidebar-books h4 {
    font-size: 18px;
    line-height: 1.2;
    margin: 14px 0 8px 0;
}

.prc-sidebar-books p {
    margin: 0 0 14px 0;
}

.prc-book-item {
    margin-top: 22px;
    margin-bottom: 30px;
}

.prc-book-cover {
    display: block;
    width: 75%;
    max-width: 180px;
    height: auto;
    margin: 0 auto 14px auto;
}

.prc-side-button {
    display: block;
    text-align: center;
    padding: 10px 14px;
    margin: 8px 0;
    border-radius: 24px;
    color: #ffffff !important;
    text-decoration: none !important;
    font-weight: 600;
}

.prc-buy {
    background-color: #22aa49;
}

.prc-sample {
    background-color: #079bd3;
}

.prc-side-button:hover {
    opacity: 0.88;
}

.prc-book-item + .prc-book-item {
    margin-top: 36px;
    padding-top: 24px;
    border-top: 1px solid #d6d6d6;
}

.prc-book-item + .prc-book-item {
    margin-top: 42px;
}
.prc-sidebar-divider {
    margin: 28px auto 24px auto;
    width: 60%;
    border: 0;
    border-top: 1px solid #d6d6d6;
}

.prc-events-section h3 {
    font-size: 22px;
    line-height: 1.2;
    margin: 0 0 14px 0;
}

.prc-events-section p {
    margin: 0 0 14px 0;
}

.prc-events-section a {
    color: #079bd3;
    text-decoration: none;
    font-weight: 500;
}

.prc-events-section a:hover {
    text-decoration: underline;
}
.prc-sidebar-divider {
  margin-top: 28px !important;
  margin-bottom: 32px !important;
}



.prc-book-item {
  margin-bottom: 0 !important;
}

.prc-side-button:last-child {
  margin-bottom: 0 !important;
}
.launch-price {
  font-size: 1.1em;
  font-weight: 700;
  color: #1faa4a;
  margin: 24px 0 18px 0;
  padding: 6px 0 6px 18px;
  border-left: 5px solid #1faa4a;
  line-height: 1.3;
}
.sidebar-launch-price {
  font-size: 0.95em;
  font-weight: 700;
  line-height: 1.35;
  color: #1faa4a;
  margin: 12px 0 18px 0;
  padding: 8px 0 8px 14px;
  border-left: 4px solid #1faa4a;
}
.offer-format {
  margin: 0;
  line-height: 1.35;
}

.offer-main {
  display: block;
  font-size: 1.1em;
  font-weight: 700;
  color: #1f9a4a; /* your green */
}

.offer-sub {
  display: block;
  font-size: 0.85em;
  color: #666666; /* smaller grey line */
  margin-top: 2px;
}
.prc-offer-box {
  margin-top: 20px;
  margin-bottom: 24px;
}
.prc-offer-price {
  margin: 0 0 18px 0;
  font-size: 26px;
  line-height: 1.25;
  color: #333333;
}

.prc-offer-format {
  margin: 0 0 20px 0;
  line-height: 1.2;
}

.prc-offer-format-main {
  font-size: 26px;
  font-weight: 700;
  color: #1fa34a;
  margin-bottom: 6px;
}

.prc-offer-format-sub {
  font-size: 18px;
  font-weight: 400;
  color: #666666;
}

.prc-offer-buttons {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 0;
  clear: both;
}

.prc-offer-price {
  margin: 0 0 18px 0;
  font-size: 26px;
  line-height: 1.25;
  color: #333333;
}

.prc-offer-format {
  margin: 0 0 20px 0;
  line-height: 1.2;
}

.prc-offer-format-main {
  font-size: 26px;
  font-weight: 700;
  color: #1fa34a;
  margin-bottom: 6px;
}

.prc-offer-format-sub {
  font-size: 18px;
  font-weight: 400;
  color: #666666;
}

.prc-offer-buttons {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 0;
  clear: both;
}
.prc-main-offer-box {
  border-left: 5px solid #1fa34a;
  padding-left: 28px;
  margin: 28px 0 36px 0;
}

.prc-main-offer-box {
  border-left: 5px solid #1fa34a;
  padding-left: 28px;
  margin: 28px 0 36px 0;
}

.prc-main-offer-box p {
  margin: 0;
}

.prc-main-offer-price {
  font-size: 30px;
  line-height: 1.25;
  font-weight: 700;
  color: #20b24f;
  margin-bottom: 10px !important;
}

.prc-main-offer-format {
  font-size: 24px;
  line-height: 1.15;
  font-weight: 700;
  color: #b89b3c;
  margin-bottom: 4px !important;
}

.prc-main-offer-paper {
  font-size: 20px;
  line-height: 1.3;
  font-weight: 400;
  color: #777777;
  margin-bottom: 28px !important;
}

.prc-main-offer-buttons {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  align-items: center;
}
.prc-sidebar-offer {
  border-left: 4px solid #1fa34a;
  padding-left: 14px;
  margin: 18px 0 22px 0;
}

.prc-sidebar-offer p {
  margin: 0;
}

.prc-sidebar-price {
  font-size: 17px;
  line-height: 1.3;
  font-weight: 700;
  color: #1fa34a;
  margin-bottom: 8px !important;
}

.prc-sidebar-format {
  font-size: 15px;
  line-height: 1.25;
  font-weight: 700;
  color: #b89b3c;
  margin-bottom: 3px !important;
}

.prc-sidebar-paper {
  font-size: 13px;
  line-height: 1.35;
  font-weight: 400;
  color: #777777;
}
.prc-book-features{
    margin:16px 0;
    padding-left:20px;
    line-height:1.6;
}

.prc-book-features li{
    margin-bottom:8px;
    color:#444;
}

.prc-book-features strong{
    color:#111;
}

.prc-diagrams-page {
  --prc-blue: #183b63;
  --prc-blue-dark: #102a46;
  --prc-pale-blue: #eaf2f8;
  --prc-border: #d7dde4;
  --prc-text: #1d2731;
  --prc-muted: #5b6670;
  --prc-white: #ffffff;
  max-width: 1180px;
  margin: 0 auto;
  color: var(--prc-text);
}

.prc-diagrams-page *,
.prc-diagrams-page *::before,
.prc-diagrams-page *::after {
  box-sizing: border-box;
}

.prc-diagrams-intro {
  margin: 0 0 28px;
  padding: 26px 28px;
  background: var(--prc-pale-blue);
  border-left: 5px solid var(--prc-blue);
  border-radius: 8px;
}

.prc-diagrams-intro h1 {
  margin: 0 0 12px;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.1;
}

.prc-diagrams-intro p {
  margin: 0 0 12px;
  font-size: 1.05rem;
  line-height: 1.65;
}

.prc-diagrams-intro p:last-child {
  margin-bottom: 0;
}

.prc-download-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 0 0 32px;
}

.prc-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 11px 18px;
  border: 2px solid var(--prc-blue);
  border-radius: 6px;
  background: var(--prc-blue);
  color: var(--prc-white) !important;
  font-weight: 700;
  line-height: 1.25;
  text-align: center;
  text-decoration: none !important;
  transition: background .18s ease, border-color .18s ease, transform .18s ease;
}

.prc-button:hover,
.prc-button:focus {
  background: var(--prc-blue-dark);
  border-color: var(--prc-blue-dark);
  transform: translateY(-1px);
}

.prc-button--secondary {
  background: var(--prc-white);
  color: var(--prc-blue) !important;
}

.prc-button--secondary:hover,
.prc-button--secondary:focus {
  background: var(--prc-pale-blue);
  color: var(--prc-blue-dark) !important;
}

.prc-diagrams-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 26px;
}

.prc-diagram-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--prc-border);
  border-radius: 9px;
  background: var(--prc-white);
  box-shadow: 0 4px 16px rgba(16, 42, 70, 0.08);
}

.prc-diagram-preview {
  display: block;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: #f4f6f8;
  border-bottom: 1px solid var(--prc-border);
}

.prc-diagram-preview img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 10px;
}

.prc-diagram-body {
  display: flex;
  flex: 1;
  flex-direction: column;
  padding: 22px;
}

.prc-diagram-body h2 {
  margin: 0 0 9px;
  font-size: 1.35rem;
  line-height: 1.25;
}

.prc-diagram-body p {
  margin: 0 0 18px;
  color: var(--prc-muted);
  line-height: 1.55;
}

.prc-card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: auto;
}

.prc-card-actions .prc-button {
  flex: 1 1 160px;
}

.prc-rights {
  margin-top: 34px;
  padding: 20px 22px;
  border: 1px solid var(--prc-border);
  border-radius: 8px;
  background: #f7f8fa;
}

.prc-rights h2 {
  margin: 0 0 8px;
  font-size: 1.2rem;
}

.prc-rights p {
  margin: 0;
  line-height: 1.6;
}

@media (max-width: 760px) {
  .prc-diagrams-grid {
    grid-template-columns: 1fr;
  }

  .prc-diagrams-intro {
    padding: 22px 20px;
  }

  .prc-download-bar,
  .prc-card-actions {
    flex-direction: column;
  }

  .prc-button,
  .prc-card-actions .prc-button {
    width: 100%;
  }
}