/* ==========================================================================
   CASE STUDIES (2026)
   Page-scoped styles, loaded only on:
     • case-study-phd-projects.html  → .csp-*
     • case-studies.html            → .csa-*
   The rest of the site continues to use css/style.css tokens. Client colours
   appear only inside evidence panels (swatches, screenshots) so the client's
   brand and the 05 IT Solutions brand stay visibly separate.
   ========================================================================== */

.csp-page {
  --cs-radius: 18px;
  --cs-radius-sm: 12px;
  --cs-ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --cs-measure: 68ch;
  /* Small supporting copy on these long-form pages needs 4.5:1 against both
     the white card surface and the tinted section surface. The global token
     (#73808C) measures 4.04:1 / 3.90:1, so the case-study pages use a
     slightly darker scoped value. The dark theme keeps the global token. */
  --color-muted: #66707B;
}

[data-theme="dark"] .csp-page {
  --color-muted: #94A3B8;
}

/* --------------------------------------------------------------------------
   01. Shared primitives
   -------------------------------------------------------------------------- */
.csp-eyebrow,
.csa-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin: 0 0 0.9rem;
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--primary-600);
}

[data-theme="dark"] .csp-eyebrow,
[data-theme="dark"] .csa-eyebrow {
  color: var(--primary-300);
}

.csp-eyebrow::before,
.csa-eyebrow::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
  flex: 0 0 auto;
}

.csp-kicker {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin: 0 0 0.75rem;
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--primary-600);
}

[data-theme="dark"] .csp-kicker {
  color: var(--primary-300);
}

.csp-kicker__num {
  font-family: var(--font-code);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--color-muted);
}

.csp-kicker__rule {
  width: 34px;
  height: 1px;
  background: var(--color-border);
}

.csp-section {
  position: relative;
  padding-block: clamp(3rem, 6vw, 5.25rem);
  border-bottom: 1px solid var(--color-border);
  scroll-margin-top: calc(var(--header-height-scrolled) + 3.6rem);
}

.csp-section--tint {
  background: var(--color-section);
}

.csp-section--tight {
  padding-block: clamp(2.25rem, 4vw, 3.5rem);
}

.csp-section__head {
  max-width: 880px;
  margin-bottom: clamp(1.75rem, 3vw, 2.75rem);
}

.csp-section__head--center {
  margin-inline: auto;
  text-align: center;
}

.csp-section__head--center .csp-kicker {
  justify-content: center;
}

.csp-section__title {
  margin: 0 0 0.9rem;
  font-family: var(--font-heading);
  font-size: clamp(1.7rem, 1.15rem + 1.9vw, 2.7rem);
  font-weight: var(--weight-bold);
  line-height: 1.14;
  letter-spacing: -0.025em;
  color: var(--color-heading);
  text-wrap: balance;
}

.csp-section__lead {
  max-width: var(--cs-measure);
  margin: 0;
  font-size: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  line-height: 1.65;
  color: var(--color-muted);
}

.csp-prose p {
  margin: 0 0 1rem;
  max-width: var(--cs-measure);
  color: var(--color-text);
}

.csp-prose p:last-child {
  margin-bottom: 0;
}

.csp-inline-link {
  color: var(--primary-600);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.csp-inline-link:hover {
  color: var(--primary-700);
}

[data-theme="dark"] .csp-inline-link {
  color: var(--primary-300);
}

[data-theme="dark"] .csp-inline-link:hover {
  color: var(--primary-200);
}

/* Evidence callout ------------------------------------------------------- */
.csp-note {
  display: flex;
  align-items: flex-start;
  gap: 0.8rem;
  margin-top: 1.5rem;
  padding: 1rem 1.15rem;
  border: 1px solid var(--primary-200);
  border-left: 3px solid var(--primary-500);
  border-radius: 0 var(--cs-radius-sm) var(--cs-radius-sm) 0;
  background: var(--primary-50);
  color: var(--neutral-700);
  font-size: 0.85rem;
  line-height: 1.6;
}

.csp-note .bi {
  color: var(--primary-600);
  font-size: 1rem;
  line-height: 1.4;
  flex: 0 0 auto;
}

.csp-note p {
  margin: 0;
}

[data-theme="dark"] .csp-note {
  border-color: rgba(92, 171, 244, 0.32);
  border-left-color: var(--primary-400);
  background: rgba(25, 118, 210, 0.14);
  color: var(--color-text);
}

[data-theme="dark"] .csp-note .bi {
  color: var(--primary-300);
}

.csp-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.22rem 0.55rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-body);
  color: var(--color-muted);
  font-family: var(--font-body);
  font-size: 0.64rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  white-space: nowrap;
}

/* Figures ---------------------------------------------------------------- */
.csp-figure {
  margin: 0;
}

.csp-figure__frame {
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--cs-radius);
  background: var(--color-card);
  box-shadow: var(--shadow-md);
}

.csp-figure__frame img {
  display: block;
  width: 100%;
  height: auto;
}

.csp-figure figcaption {
  margin-top: 0.75rem;
  font-size: 0.78rem;
  line-height: 1.55;
  color: var(--color-muted);
}

.csp-figure figcaption strong {
  color: var(--color-heading);
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   02. Hero
   -------------------------------------------------------------------------- */
.csp-hero {
  position: relative;
  overflow: clip;
  padding-block: clamp(2.75rem, 5.5vw, 5.25rem) clamp(2.5rem, 5vw, 4.5rem);
  border-bottom: 1px solid var(--color-border);
  background:
    radial-gradient(ellipse at 84% 6%, rgba(25, 118, 210, 0.13), transparent 52%),
    radial-gradient(ellipse at 4% 96%, rgba(51, 153, 255, 0.09), transparent 46%),
    linear-gradient(180deg, var(--color-section), var(--color-body));
}

[data-theme="dark"] .csp-hero {
  background:
    radial-gradient(ellipse at 84% 6%, rgba(92, 171, 244, 0.15), transparent 52%),
    radial-gradient(ellipse at 4% 96%, rgba(25, 118, 210, 0.14), transparent 46%),
    linear-gradient(180deg, var(--color-section), var(--color-body));
}

.csp-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(25, 118, 210, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(25, 118, 210, 0.05) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.5), transparent 72%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.5), transparent 72%);
}

[data-theme="dark"] .csp-hero::before {
  background-image:
    linear-gradient(rgba(92, 171, 244, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(92, 171, 244, 0.07) 1px, transparent 1px);
}

.csp-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
  gap: clamp(2rem, 4.5vw, 4.5rem);
  align-items: center;
}

.csp-hero__content {
  min-width: 0;
}

.csp-hero__client {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  margin-bottom: 1.1rem;
  padding: 0.35rem 0.8rem 0.35rem 0.4rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-card);
}

.csp-hero__logo {
  display: grid;
  place-items: center;
  width: 2.15rem;
  height: 2.15rem;
  padding: 0.28rem;
  border-radius: 50%;
  background: #FFFFFF;
  box-shadow: inset 0 0 0 1px rgba(15, 23, 42, 0.08);
}

.csp-hero__logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.csp-hero__client-name {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-heading);
  line-height: 1.2;
}

.csp-hero__client-domain {
  display: block;
  font-family: var(--font-code);
  font-size: 0.63rem;
  font-weight: 400;
  color: var(--color-muted);
  letter-spacing: 0;
}

.csp-hero__title {
  max-width: 17ch;
  margin: 0 0 1.15rem;
  font-family: var(--font-heading);
  font-size: clamp(2.25rem, 1.3rem + 3.7vw, 4.05rem);
  font-weight: var(--weight-bold);
  line-height: 1.03;
  letter-spacing: -0.04em;
  color: var(--color-heading);
  text-wrap: balance;
}

.csp-hero__lead {
  max-width: 56ch;
  margin: 0 0 1.5rem;
  font-size: clamp(1rem, 0.94rem + 0.32vw, 1.18rem);
  line-height: 1.65;
  color: var(--color-text);
}

.csp-hero__meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem 1.25rem;
  margin: 0 0 1.35rem;
  padding: 1.1rem 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.csp-hero__meta-item dt {
  margin-bottom: 0.22rem;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.csp-hero__meta-item dd {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.45;
  color: var(--color-heading);
}

.csp-hero__meta-item dd span {
  color: var(--color-muted);
}

.csp-hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
}

.csp-hero__actions .site-btn {
  white-space: normal;
}

.csp-hero__archive-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-left: 0.35rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-muted);
}

.csp-hero__archive-link:hover {
  color: var(--primary-600);
}

.csp-hero__visual {
  position: relative;
  min-width: 0;
}

.csp-browser {
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--cs-radius);
  background: var(--color-card);
  box-shadow: var(--shadow-lg);
}

.csp-browser__bar {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.55rem 0.7rem;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-section);
}

.csp-browser__dots {
  display: inline-flex;
  gap: 0.28rem;
  flex: 0 0 auto;
}

.csp-browser__dots span {
  width: 0.42rem;
  height: 0.42rem;
  border-radius: 50%;
  background: var(--color-border);
}

.csp-browser__dots span:first-child {
  background: #F87171;
}

.csp-browser__dots span:nth-child(2) {
  background: #FBBF24;
}

.csp-browser__dots span:nth-child(3) {
  background: #34D399;
}

.csp-browser__url {
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
  padding: 0.22rem 0.55rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-card);
  color: var(--color-muted);
  font-family: var(--font-code);
  font-size: 0.62rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.csp-browser__shot {
  display: block;
  width: 100%;
  aspect-ratio: 1440 / 1000;
  object-fit: cover;
  object-position: top center;
}

.csp-hero__archive {
  position: absolute;
  left: -1.15rem;
  bottom: -1.4rem;
  width: min(44%, 280px);
  padding: 0.35rem;
  border: 1px solid var(--color-border);
  border-radius: 14px;
  background: var(--color-card);
  box-shadow: var(--shadow-lg);
  transform: rotate(-2.4deg);
}

.csp-hero__archive img {
  display: block;
  width: 100%;
  aspect-ratio: 1440 / 1000;
  object-fit: cover;
  object-position: top center;
  border-radius: 9px;
}

.csp-hero__archive-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.4rem;
  padding: 0.42rem 0.35rem 0.25rem;
  font-family: var(--font-code);
  font-size: 0.6rem;
  color: var(--color-muted);
  white-space: nowrap;
}

.csp-hero__archive-label b {
  color: var(--color-heading);
  font-family: var(--font-body);
  font-size: 0.63rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.csp-hero__badge {
  position: absolute;
  top: 0.9rem;
  right: -0.6rem;
  z-index: 2;
  padding: 0.4rem 0.7rem;
  border-radius: var(--radius-pill);
  background: var(--neutral-900);
  color: #FFFFFF;
  font-size: 0.64rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  box-shadow: var(--shadow-md);
}

[data-theme="dark"] .csp-hero__badge {
  background: #FFFFFF;
  color: var(--neutral-900);
}

/* --------------------------------------------------------------------------
   03. Jump navigation
   -------------------------------------------------------------------------- */
.csp-jump {
  position: sticky;
  top: var(--header-height-scrolled);
  z-index: 1015;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-header-bg);
}

@supports (backdrop-filter: blur(12px)) or (-webkit-backdrop-filter: blur(12px)) {
  .csp-jump {
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    background: var(--color-header-bg);
  }
}

.csp-jump__inner {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding-block: 0.55rem;
}

.csp-jump__label {
  flex: 0 0 auto;
  font-family: var(--font-code);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.csp-jump__links {
  display: flex;
  align-items: center;
  gap: 0.12rem;
  overflow-x: auto;
  padding: 0.15rem 0;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.csp-jump__links::-webkit-scrollbar {
  display: none;
}

.csp-jump__link {
  flex: 0 0 auto;
  padding: 0.38rem 0.62rem;
  border-radius: var(--radius-pill);
  color: var(--color-muted);
  font-size: 0.75rem;
  font-weight: 500;
  line-height: 1.2;
  white-space: nowrap;
  transition: color 0.18s ease, background-color 0.18s ease;
}

.csp-jump__link:hover {
  color: var(--primary-600);
  background: var(--color-section);
}

[data-theme="dark"] .csp-jump__link:hover {
  color: var(--primary-300);
}

.csp-jump__link.is-active {
  color: var(--primary-700);
  background: var(--primary-50);
  font-weight: 700;
}

[data-theme="dark"] .csp-jump__link.is-active {
  color: var(--primary-200);
  background: rgba(25, 118, 210, 0.24);
}

.csp-jump__link:focus-visible {
  outline: 2px solid var(--primary-500);
  outline-offset: 1px;
}

/* --------------------------------------------------------------------------
   04. Overview
   -------------------------------------------------------------------------- */
.csp-overview {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.85fr);
  gap: clamp(2rem, 4vw, 4rem);
  align-items: start;
}

.csp-overview__main {
  min-width: 0;
}

.csp-facts {
  display: grid;
  gap: 0.55rem;
}

.csp-fact {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.85rem;
  align-items: center;
  padding: 0.9rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--cs-radius-sm);
  background: var(--color-card);
}

.csp-fact__value {
  display: grid;
  place-items: center;
  min-width: 3.1rem;
  height: 3.1rem;
  padding: 0 0.2rem;
  border-radius: 10px;
  background: var(--primary-50);
  color: var(--primary-700);
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1;
}

[data-theme="dark"] .csp-fact__value {
  background: rgba(25, 118, 210, 0.22);
  color: var(--primary-200);
}

.csp-fact__label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-heading);
  line-height: 1.35;
}

.csp-fact__meta {
  display: block;
  margin-top: 0.15rem;
  font-size: 0.72rem;
  line-height: 1.45;
  color: var(--color-muted);
}

/* --------------------------------------------------------------------------
   05. Context + friction list
   -------------------------------------------------------------------------- */
.csp-context {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: clamp(2rem, 4vw, 4rem);
  align-items: start;
}

.csp-context__figure {
  position: sticky;
  top: calc(var(--header-height-scrolled) + 4.5rem);
}

.csp-context__body {
  min-width: 0;
}

.csp-pullquote {
  margin: 1.6rem 0 0;
  padding: 1.1rem 0 0 1.2rem;
  border-top: 1px solid var(--color-border);
  border-left: 2px solid var(--primary-400);
  color: var(--color-heading);
  font-family: var(--font-heading);
  font-size: clamp(1.05rem, 0.95rem + 0.55vw, 1.32rem);
  font-weight: 600;
  line-height: 1.45;
  letter-spacing: -0.015em;
}

.csp-pullquote span {
  display: block;
  margin-top: 0.5rem;
  font-family: var(--font-code);
  font-size: 0.62rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.csp-friction {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--color-border);
}

.csp-friction__item {
  display: grid;
  grid-template-columns: 2.6rem minmax(0, 1fr) auto;
  gap: 1rem;
  padding-block: 1.35rem;
  border-bottom: 1px solid var(--color-border);
  align-items: start;
}

.csp-friction__num {
  padding-top: 0.15rem;
  font-family: var(--font-code);
  font-size: 0.72rem;
  color: var(--primary-600);
}

[data-theme="dark"] .csp-friction__num {
  color: var(--primary-300);
}

.csp-friction__title {
  margin: 0 0 0.3rem;
  font-family: var(--font-heading);
  font-size: 1.02rem;
  font-weight: 600;
  line-height: 1.35;
  color: var(--color-heading);
}

.csp-friction__text {
  max-width: 72ch;
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--color-muted);
}

/* --------------------------------------------------------------------------
   06. Cards, tables, architecture
   -------------------------------------------------------------------------- */
.csp-grid {
  display: grid;
  gap: 0.9rem;
}

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

.csp-grid--3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

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

.csp-gallery {
  margin-top: 1.25rem;
}

.csp-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 1.3rem;
  border: 1px solid var(--color-border);
  border-radius: var(--cs-radius-sm);
  background: var(--color-card);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

@media (hover: hover) {
  .csp-card:hover {
    border-color: var(--primary-300);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
  }
}

[data-theme="dark"] .csp-card:hover {
  border-color: var(--primary-600);
}

.csp-card__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
}

.csp-card__num {
  font-family: var(--font-code);
  font-size: 0.68rem;
  letter-spacing: 0.05em;
  color: var(--color-muted);
}

.csp-card__icon {
  display: grid;
  place-items: center;
  width: 2.35rem;
  height: 2.35rem;
  border-radius: 10px;
  background: var(--primary-50);
  color: var(--primary-700);
  font-size: 1rem;
}

[data-theme="dark"] .csp-card__icon {
  background: rgba(25, 118, 210, 0.22);
  color: var(--primary-200);
}

.csp-card__title {
  margin: 0 0 0.45rem;
  font-family: var(--font-heading);
  font-size: 1.02rem;
  font-weight: 600;
  line-height: 1.35;
  color: var(--color-heading);
}

.csp-card__text {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.62;
  color: var(--color-muted);
}

.csp-card__response {
  margin-top: auto;
  padding-top: 0.85rem;
  border-top: 1px dashed var(--color-border);
  font-size: 0.78rem;
  line-height: 1.55;
  color: var(--color-text);
}

.csp-card__response b {
  color: var(--primary-700);
  font-weight: 700;
}

[data-theme="dark"] .csp-card__response b {
  color: var(--primary-300);
}

.csp-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--cs-radius-sm);
  background: var(--color-card);
  -webkit-overflow-scrolling: touch;
}

.csp-table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  font-size: 0.86rem;
  line-height: 1.55;
}

.csp-table caption {
  caption-side: top;
  padding: 0.85rem 1rem 0;
  color: var(--color-muted);
  font-size: 0.72rem;
  text-align: left;
}

.csp-table th,
.csp-table td {
  padding: 0.8rem 0.95rem;
  border-bottom: 1px solid var(--color-border);
  text-align: left;
  vertical-align: top;
}

.csp-table thead th {
  background: var(--color-section);
  color: var(--color-muted);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.csp-table tbody th {
  width: 17%;
  color: var(--color-heading);
  font-weight: 600;
}

.csp-table td {
  color: var(--color-text);
}

.csp-table tbody tr:last-child th,
.csp-table tbody tr:last-child td {
  border-bottom: 0;
}

.csp-table__before {
  color: var(--color-muted);
}

.csp-arch {
  position: relative;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.7rem;
  margin-top: 1.5rem;
}

.csp-arch::before {
  content: "";
  position: absolute;
  top: 1.05rem;
  left: 8%;
  right: 8%;
  height: 1px;
  background: var(--color-border);
}

.csp-arch__node {
  position: relative;
  z-index: 1;
  padding: 1rem 0.7rem 0.9rem;
  border: 1px solid var(--color-border);
  border-radius: var(--cs-radius-sm);
  background: var(--color-card);
  text-align: center;
}

.csp-arch__num {
  display: grid;
  place-items: center;
  width: 1.65rem;
  height: 1.65rem;
  margin: 0 auto 0.6rem;
  border-radius: 50%;
  background: var(--primary-500);
  color: #FFFFFF;
  font-family: var(--font-code);
  font-size: 0.68rem;
  box-shadow: 0 0 0 5px var(--color-body);
}

.csp-section--tint .csp-arch__num {
  box-shadow: 0 0 0 5px var(--color-section);
}

.csp-arch__title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: 0.82rem;
  font-weight: 600;
  line-height: 1.35;
  color: var(--color-heading);
}

.csp-arch__meta {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.68rem;
  color: var(--color-muted);
}

.csp-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.7rem;
  margin-top: 1.25rem;
}

.csp-step {
  padding: 1rem;
  border-left: 2px solid var(--primary-200);
  background: linear-gradient(90deg, var(--primary-50), transparent);
}

[data-theme="dark"] .csp-step {
  border-left-color: var(--primary-600);
  background: linear-gradient(90deg, rgba(25, 118, 210, 0.16), transparent);
}

.csp-step__label {
  display: block;
  font-family: var(--font-code);
  font-size: 0.64rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--primary-700);
}

[data-theme="dark"] .csp-step__label {
  color: var(--primary-300);
}

.csp-step__title {
  margin: 0.28rem 0 0.3rem;
  font-family: var(--font-heading);
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--color-heading);
}

.csp-step__text {
  margin: 0;
  font-size: 0.76rem;
  line-height: 1.55;
  color: var(--color-muted);
}

/* --------------------------------------------------------------------------
   07. Visual system evidence
   -------------------------------------------------------------------------- */
.csp-palette {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.csp-palette__panel {
  padding: 1.15rem;
  border: 1px solid var(--color-border);
  border-radius: var(--cs-radius-sm);
  background: var(--color-card);
}

.csp-palette__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.9rem;
}

.csp-palette__name {
  margin: 0;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-heading);
}

.csp-palette__meta {
  margin: 0.2rem 0 0;
  font-size: 0.72rem;
  color: var(--color-muted);
}

.csp-swatches {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.45rem;
}

.csp-swatch {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  min-width: 0;
  padding: 0.42rem;
  border: 1px solid var(--color-border);
  border-radius: 9px;
  background: var(--color-body);
}

.csp-swatch__chip {
  flex: 0 0 auto;
  width: 1.85rem;
  height: 1.85rem;
  border: 1px solid rgba(15, 23, 42, 0.14);
  border-radius: 7px;
}

.csp-swatch__name {
  display: block;
  overflow: hidden;
  font-size: 0.7rem;
  font-weight: 600;
  line-height: 1.25;
  color: var(--color-heading);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.csp-swatch__hex {
  display: block;
  font-family: var(--font-code);
  font-size: 0.62rem;
  line-height: 1.4;
  color: var(--color-muted);
  text-transform: uppercase;
}

.csp-contrast {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.55rem;
  margin-top: 1.1rem;
}

.csp-contrast__item {
  padding: 0.75rem 0.8rem;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: var(--color-card);
}

.csp-contrast__ratio {
  display: block;
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-heading);
}

.csp-contrast__label {
  display: block;
  margin-top: 0.15rem;
  font-size: 0.68rem;
  line-height: 1.4;
  color: var(--color-muted);
}

.csp-contrast__flag {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  margin-top: 0.35rem;
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.csp-contrast__flag--pass {
  background: rgba(16, 185, 129, 0.14);
  color: #047857;
}

.csp-contrast__flag--fail {
  background: rgba(239, 68, 68, 0.14);
  color: #B91C1C;
}

.csp-contrast__flag--accent {
  background: rgba(249, 115, 22, 0.16);
  color: #9A3412;
}

[data-theme="dark"] .csp-contrast__flag--pass {
  color: #6EE7B7;
}

[data-theme="dark"] .csp-contrast__flag--fail {
  color: #FCA5A5;
}

[data-theme="dark"] .csp-contrast__flag--accent {
  color: #FDBA74;
}

.csp-type {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.csp-type__panel {
  padding: 1.15rem;
  border: 1px solid var(--color-border);
  border-radius: var(--cs-radius-sm);
  background: var(--color-card);
}

.csp-type__sample {
  overflow: hidden;
  padding: 1rem;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: #FFFFFF;
  color: #333333;
}

.csp-type__sample--old-head {
  font-family: "Arial Narrow", "Open Sans Condensed", Arial, sans-serif;
  font-size: 28px;
  font-weight: 600;
  line-height: 35px;
  color: #343A41;
}

.csp-type__sample--old-body {
  margin-top: 0.6rem;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 14px;
  line-height: 1.43;
  color: #333333;
}

.csp-type__sample--new-head {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: clamp(1.45rem, 3.2vw, 2.35rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: #0F172A;
}

.csp-type__sample--new-body {
  margin-top: 0.6rem;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: #343C47;
}

.csp-specs {
  margin: 0.9rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.4rem;
}

.csp-specs li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.8rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px dashed var(--color-border);
  font-size: 0.72rem;
}

.csp-specs li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.csp-specs span {
  color: var(--color-muted);
}

.csp-specs b {
  font-family: var(--font-code);
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--color-heading);
  text-align: right;
}

.csp-brand-split {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.6rem;
  margin-top: 1rem;
}

.csp-brand-split__item {
  display: flex;
  gap: 0.65rem;
  padding: 0.8rem;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: var(--color-card);
}

.csp-brand-split__mark {
  flex: 0 0 auto;
  width: 0.7rem;
  height: 0.7rem;
  margin-top: 0.28rem;
  border-radius: 2px;
}

.csp-brand-split__mark--client {
  background: #0E7490;
}

.csp-brand-split__mark--site {
  background: var(--primary-500);
}

.csp-brand-split__item b {
  display: block;
  font-size: 0.76rem;
  color: var(--color-heading);
}

.csp-brand-split__item span {
  display: block;
  margin-top: 0.1rem;
  font-size: 0.7rem;
  line-height: 1.45;
  color: var(--color-muted);
}

/* --------------------------------------------------------------------------
   08. Homepage anatomy
   -------------------------------------------------------------------------- */
.csp-home {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  gap: clamp(1.5rem, 3.5vw, 3rem);
  align-items: start;
}

.csp-fullpage {
  padding: 0.45rem;
  border: 1px solid var(--color-border);
  border-radius: var(--cs-radius);
  background: var(--color-card);
  box-shadow: var(--shadow-md);
}

.csp-fullpage__scroll {
  max-height: 620px;
  overflow-y: auto;
  border-radius: 10px;
  background: var(--color-section);
  scrollbar-color: var(--color-border) transparent;
  scrollbar-width: thin;
}

.csp-fullpage__scroll:focus-visible {
  outline: 2px solid var(--primary-500);
  outline-offset: 3px;
}

.csp-fullpage__scroll img {
  display: block;
  width: 100%;
  height: auto;
}

.csp-fullpage__hint {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  padding: 0.5rem 0.35rem 0.15rem;
  font-family: var(--font-code);
  font-size: 0.6rem;
  color: var(--color-muted);
}

.csp-home__map {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: home;
  display: grid;
  gap: 0.15rem;
}

.csp-home__map li {
  display: grid;
  grid-template-columns: 1.7rem minmax(0, 1fr);
  gap: 0.65rem;
  padding-block: 0.62rem;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--color-muted);
}

.csp-home__map li:last-child {
  border-bottom: 0;
}

.csp-home__map li::before {
  counter-increment: home;
  content: counter(home, decimal-leading-zero);
  font-family: var(--font-code);
  font-size: 0.66rem;
  color: var(--primary-600);
  padding-top: 0.12rem;
}

[data-theme="dark"] .csp-home__map li::before {
  color: var(--primary-300);
}

.csp-home__map b {
  display: block;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-heading);
}

/* --------------------------------------------------------------------------
   09. Service explorer
   -------------------------------------------------------------------------- */
.csp-facts-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.55rem;
  margin-bottom: 1.25rem;
}

.csp-facts-row__item {
  padding: 0.8rem 0.9rem;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: var(--color-card);
}

.csp-facts-row__value {
  display: block;
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1;
  color: var(--primary-700);
}

[data-theme="dark"] .csp-facts-row__value {
  color: var(--primary-300);
}

.csp-facts-row__label {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.7rem;
  color: var(--color-muted);
}

.csp-explorer {
  display: grid;
  grid-template-columns: minmax(0, 300px) minmax(0, 1fr);
  gap: 1rem;
  align-items: start;
}

.csp-panels {
  min-width: 0;
}

.csp-tabs {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.csp-tab {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 0.6rem;
  align-items: center;
  width: 100%;
  padding: 0.75rem 0.85rem;
  border: 1px solid transparent;
  border-radius: 10px;
  background: transparent;
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 0.82rem;
  line-height: 1.35;
  text-align: left;
  cursor: pointer;
  transition: background-color 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}

.csp-tab:hover {
  background: var(--color-section);
}

.csp-tab:focus-visible {
  outline: 2px solid var(--primary-500);
  outline-offset: 1px;
}

.csp-tab[aria-selected="true"] {
  border-color: var(--color-border);
  background: var(--color-card);
  color: var(--primary-700);
  box-shadow: var(--shadow-sm);
}

[data-theme="dark"] .csp-tab[aria-selected="true"] {
  color: var(--primary-200);
}

.csp-tab__num {
  font-family: var(--font-code);
  font-size: 0.64rem;
  color: var(--color-muted);
}

.csp-tab__count {
  font-family: var(--font-code);
  font-size: 0.62rem;
  color: var(--color-muted);
}

.csp-panel {
  min-height: 280px;
  padding: 1.15rem;
  border: 1px solid var(--color-border);
  border-radius: var(--cs-radius-sm);
  background: var(--color-card);
}

.csp-panel[hidden] {
  display: none;
}

.csp-panel__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.6rem;
  margin-bottom: 0.35rem;
}

.csp-panel__title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.35;
  color: var(--color-heading);
}

.csp-panel__meta {
  margin: 0;
  font-size: 0.78rem;
  line-height: 1.55;
  color: var(--color-muted);
}

.csp-panel__hint {
  margin: 0.65rem 0 0;
  font-family: var(--font-code);
  font-size: 0.6rem;
  letter-spacing: 0.03em;
  color: var(--color-muted);
}

.csp-service-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.45rem;
  margin-top: 0.85rem;
}

.csp-service-stub {
  padding: 0.7rem;
  border: 1px dashed var(--color-border);
  border-radius: 8px;
  background: var(--color-section);
}

.csp-service-stub span {
  display: block;
  font-family: var(--font-code);
  font-size: 0.58rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.csp-service-stub b {
  display: block;
  margin-top: 0.18rem;
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--color-heading);
}

.csp-service-stub i {
  display: inline-flex;
  align-items: center;
  gap: 0.2rem;
  margin-top: 0.45rem;
  font-size: 0.62rem;
  font-style: normal;
  color: var(--primary-700);
}

[data-theme="dark"] .csp-service-stub i {
  color: var(--primary-300);
}

/* --------------------------------------------------------------------------
   10. Motion demo
   -------------------------------------------------------------------------- */
.csp-motion {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(1.5rem, 3.5vw, 2.75rem);
  align-items: start;
}

.csp-motion__stage {
  padding: 0.85rem;
  border: 1px solid var(--color-border);
  border-radius: var(--cs-radius);
  background: var(--color-card);
  box-shadow: var(--shadow-md);
}

.csp-motion__demo {
  padding: 1rem;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: var(--color-section);
  overflow: hidden;
}

.csp-motion__demo-head {
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-card);
}

.csp-motion__demo-head b {
  display: block;
  font-family: var(--font-heading);
  font-size: 0.82rem;
  color: var(--color-heading);
}

.csp-motion__demo-head span {
  display: block;
  margin-top: 0.2rem;
  font-size: 0.66rem;
  color: var(--color-muted);
}

.csp-motion__rail {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.25rem;
  margin-top: 0.55rem;
}

.csp-motion__rail span {
  padding: 0.35rem 0.2rem;
  border: 1px solid var(--color-border);
  border-radius: 5px;
  background: var(--color-card);
  color: var(--color-muted);
  font-family: var(--font-code);
  font-size: 0.54rem;
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.csp-motion__cards {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.3rem;
  margin-top: 0.55rem;
}

.csp-motion__card {
  padding: 0.55rem 0.45rem;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: var(--color-card);
}

.csp-motion__card b {
  display: block;
  font-size: 0.6rem;
  font-weight: 600;
  color: var(--color-heading);
  line-height: 1.3;
}

.csp-motion__card span {
  display: block;
  margin-top: 0.3rem;
  height: 0.28rem;
  border-radius: 999px;
  background: var(--color-border);
}

.csp-motion__card span + span {
  width: 65%;
  margin-top: 0.2rem;
}

.csp-motion__controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
  margin-top: 0.75rem;
}

.csp-motion__status {
  min-height: 1.3em;
  margin: 0.55rem 0 0;
  font-size: 0.7rem;
  line-height: 1.45;
  color: var(--color-muted);
}

.csp-motion__specs {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.55rem;
}

.csp-motion__spec {
  display: grid;
  grid-template-columns: 3.6rem minmax(0, 1fr);
  gap: 0.65rem;
  padding-bottom: 0.55rem;
  border-bottom: 1px solid var(--color-border);
}

.csp-motion__spec:last-child {
  border-bottom: 0;
}

.csp-motion__spec code {
  font-family: var(--font-code);
  font-size: 0.68rem;
  color: var(--primary-700);
}

[data-theme="dark"] .csp-motion__spec code {
  color: var(--primary-300);
}

.csp-motion__spec b {
  display: block;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-heading);
}

.csp-motion__spec span {
  display: block;
  margin-top: 0.12rem;
  font-size: 0.72rem;
  line-height: 1.45;
  color: var(--color-muted);
}

/* --------------------------------------------------------------------------
   11. Responsive previewer
   -------------------------------------------------------------------------- */
.csp-responsive__top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.csp-switch {
  display: inline-flex;
  gap: 0.18rem;
  padding: 0.22rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-section);
}

.csp-switch__btn {
  padding: 0.42rem 0.7rem;
  border: 0;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--color-muted);
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 600;
  line-height: 1.2;
  cursor: pointer;
  white-space: nowrap;
}

.csp-switch__btn:hover {
  color: var(--primary-600);
}

.csp-switch__btn[aria-pressed="true"] {
  background: var(--color-card);
  color: var(--primary-700);
  box-shadow: var(--shadow-sm);
}

[data-theme="dark"] .csp-switch__btn[aria-pressed="true"] {
  color: var(--primary-200);
}

.csp-switch__btn:focus-visible {
  outline: 2px solid var(--primary-500);
  outline-offset: 1px;
}

.csp-device {
  display: grid;
  place-items: end center;
  min-height: 420px;
  margin-top: 1rem;
  padding: clamp(0.75rem, 3vw, 2rem);
  border: 1px solid var(--color-border);
  border-radius: var(--cs-radius);
  background:
    radial-gradient(circle at 50% 0%, rgba(25, 118, 210, 0.1), transparent 60%),
    var(--color-section);
}

.csp-device__frame {
  width: 100%;
  max-width: 980px;
  padding: 0.35rem;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  background: var(--color-card);
  box-shadow: var(--shadow-lg);
  transition: max-width 0.3s var(--cs-ease);
}

.csp-device__frame[data-device="tablet"] {
  max-width: 560px;
}

.csp-device__frame[data-device="mobile"],
.csp-device__frame[data-device="menu"] {
  max-width: 300px;
}

.csp-device__frame img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 8px;
}

.csp-device__caption {
  margin: 0.75rem 0 0;
  font-size: 0.75rem;
  line-height: 1.5;
  color: var(--color-muted);
  text-align: center;
}

.csp-responsive__notes {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.7rem;
  margin-top: 1rem;
}

.csp-responsive__note {
  display: flex;
  gap: 0.55rem;
  padding: 0.8rem;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: var(--color-card);
  font-size: 0.75rem;
  line-height: 1.5;
  color: var(--color-muted);
}

.csp-responsive__note .bi {
  flex: 0 0 auto;
  color: var(--primary-600);
}

/* --------------------------------------------------------------------------
   12. Quality / stack
   -------------------------------------------------------------------------- */
.csp-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.6rem;
}

.csp-stat {
  padding: 1rem;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: var(--color-card);
}

.csp-stat__value {
  display: block;
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 2.4vw, 2rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--primary-700);
}

[data-theme="dark"] .csp-stat__value {
  color: var(--primary-300);
}

.csp-stat__label {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.7rem;
  line-height: 1.4;
  color: var(--color-muted);
}

.csp-quality-lists {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.25rem;
}

.csp-checklist {
  margin: 0;
  padding: 1rem 1.1rem;
  list-style: none;
  border: 1px solid var(--color-border);
  border-radius: var(--cs-radius-sm);
  background: var(--color-card);
}

.csp-checklist__title {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin: 0 0 0.65rem;
  font-family: var(--font-heading);
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--color-heading);
}

.csp-checklist__title .bi-check2-circle {
  color: #059669;
}

.csp-checklist__title .bi-exclamation-circle {
  color: #D97706;
}

.csp-checklist li {
  position: relative;
  padding: 0.38rem 0 0.38rem 1.35rem;
  border-top: 1px dashed var(--color-border);
  font-size: 0.78rem;
  line-height: 1.55;
  color: var(--color-muted);
}

.csp-checklist li:first-of-type {
  border-top: 0;
}

.csp-checklist li::before {
  content: "\F26A";
  position: absolute;
  left: 0;
  top: 0.34rem;
  font-family: "bootstrap-icons";
  font-size: 0.75rem;
  color: #059669;
}

.csp-checklist--review li::before {
  content: "\F33A";
  color: #D97706;
}

.csp-stack {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.6rem;
  margin-top: 1.25rem;
}

.csp-stack__item {
  padding: 1rem;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: var(--color-card);
}

.csp-stack__icon {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  margin-bottom: 0.6rem;
  border-radius: 8px;
  background: var(--color-section);
  color: var(--primary-700);
  font-size: 0.9rem;
}

[data-theme="dark"] .csp-stack__icon {
  color: var(--primary-300);
}

.csp-stack__name {
  margin: 0;
  font-family: var(--font-heading);
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--color-heading);
}

.csp-stack__version {
  display: block;
  margin-top: 0.15rem;
  font-family: var(--font-code);
  font-size: 0.64rem;
  color: var(--color-muted);
}

/* --------------------------------------------------------------------------
   13. Before / after slider
   -------------------------------------------------------------------------- */
.csp-compare {
  --csp-split: 50%;
  margin-top: 1.5rem;
}

.csp-compare__stage {
  position: relative;
  overflow: hidden;
  aspect-ratio: 1440 / 1000;
  border: 1px solid var(--color-border);
  border-radius: var(--cs-radius);
  background: var(--color-section);
  box-shadow: var(--shadow-md);
  touch-action: pan-y;
}

.csp-compare__img {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
}

.csp-compare__img--before {
  clip-path: inset(0 calc(100% - var(--csp-split)) 0 0);
}

.csp-compare__divider {
  position: absolute;
  top: 0;
  bottom: 0;
  left: var(--csp-split);
  width: 2px;
  transform: translateX(-1px);
  background: #FFFFFF;
  box-shadow: 0 0 0 1px rgba(15, 23, 42, 0.18);
  pointer-events: none;
}

.csp-compare__handle {
  position: absolute;
  top: 50%;
  left: var(--csp-split);
  display: grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  transform: translate(-50%, -50%);
  border: 1px solid rgba(15, 23, 42, 0.12);
  border-radius: 50%;
  background: #FFFFFF;
  color: #0F172A;
  box-shadow: 0 6px 18px rgba(15, 23, 42, 0.28);
  font-size: 0.9rem;
  pointer-events: none;
}

.csp-compare__label {
  position: absolute;
  top: 0.75rem;
  padding: 0.28rem 0.5rem;
  border-radius: 5px;
  background: rgba(15, 23, 42, 0.82);
  color: #FFFFFF;
  font-family: var(--font-code);
  font-size: 0.58rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
}

.csp-compare__label--before {
  left: 0.75rem;
}

.csp-compare__label--after {
  right: 0.75rem;
}

.csp-compare__control {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.75rem;
  margin-top: 0.8rem;
}

.csp-compare__control label {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-heading);
  white-space: nowrap;
}

.csp-compare__control output {
  font-family: var(--font-code);
  font-size: 0.64rem;
  color: var(--color-muted);
  white-space: nowrap;
}

.csp-compare__range {
  width: 100%;
  accent-color: var(--primary-500);
  cursor: ew-resize;
}

.csp-compare__range:focus-visible {
  outline: 2px solid var(--primary-500);
  outline-offset: 3px;
}

/* --------------------------------------------------------------------------
   14. Outcome + related + CTA
   -------------------------------------------------------------------------- */
.csp-outcome {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.7rem;
}

.csp-outcome__item {
  padding: 1.15rem;
  border: 1px solid var(--color-border);
  border-radius: var(--cs-radius-sm);
  background: var(--color-card);
}

.csp-outcome__num {
  font-family: var(--font-code);
  font-size: 0.64rem;
  color: var(--color-muted);
}

.csp-outcome__title {
  margin: 0.55rem 0 0.4rem;
  font-family: var(--font-heading);
  font-size: 0.98rem;
  font-weight: 600;
  line-height: 1.35;
  color: var(--color-heading);
}

.csp-outcome__text {
  margin: 0;
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--color-muted);
}

.csp-evidence {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.25rem;
}

.csp-evidence__panel {
  padding: 1.15rem;
  border: 1px solid var(--color-border);
  border-radius: var(--cs-radius-sm);
  background: var(--color-card);
}

.csp-evidence__title {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin: 0 0 0.7rem;
  font-family: var(--font-heading);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-heading);
}

.csp-evidence__title .bi-check2-circle {
  color: #059669;
}

.csp-evidence__title .bi-slash-circle {
  color: #DC2626;
}

.csp-evidence__panel ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.csp-evidence__panel li {
  position: relative;
  padding: 0.36rem 0 0.36rem 1.1rem;
  font-size: 0.78rem;
  line-height: 1.55;
  color: var(--color-muted);
}

.csp-evidence__panel li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72rem;
  width: 0.32rem;
  height: 0.32rem;
  border-radius: 50%;
  background: var(--primary-400);
}

.csp-related {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.7rem;
}

.csp-related__card {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 1.15rem;
  border: 1px solid var(--color-border);
  border-radius: var(--cs-radius-sm);
  background: var(--color-card);
  color: var(--color-text);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

@media (hover: hover) {
  .csp-related__card:hover {
    border-color: var(--primary-300);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
  }
}

.csp-related__card:focus-visible {
  outline: 2px solid var(--primary-500);
  outline-offset: 2px;
}

.csp-related__eyebrow {
  font-family: var(--font-code);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.csp-related__title {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-heading);
}

.csp-related__text {
  font-size: 0.78rem;
  line-height: 1.55;
  color: var(--color-muted);
}

.csp-related__link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  margin-top: 0.15rem;
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--primary-600);
}

[data-theme="dark"] .csp-related__link {
  color: var(--primary-300);
}

.csp-page .final-cta {
  border-top: 1px solid var(--color-border);
}

/* --------------------------------------------------------------------------
   Restored hero (earlier Case Studies design)
   Reinstates the original editorial intro: eyebrow, heading and lead copy
   in a single column. Applied only on case-studies.html.
   -------------------------------------------------------------------------- */
.cs-intro {
  padding-block: clamp(var(--space-6), 5vw, var(--space-8)) clamp(var(--space-5), 3vw, var(--space-6));
}

.cs-intro__header {
  max-width: var(--content-measure);
}

.cs-intro__title {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-bold);
  font-size: clamp(2rem, 2.4vw + 1.2rem, 3rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--color-heading);
}

.cs-intro__lead {
  max-width: 660px;
  margin: var(--space-4) 0 0;
  font-size: clamp(1rem, 0.4vw + 0.95rem, 1.125rem);
  line-height: 1.7;
  color: var(--color-muted);
}

/* ==========================================================================
   ARCHIVE PAGE
   ========================================================================== */
.csa-featured {
  padding-block: clamp(var(--space-6), 4vw, var(--space-8));
}

.csa-feature {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-card);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.csa-feature:hover {
  border-color: var(--primary-300);
  box-shadow: var(--shadow-md);
}

[data-theme="dark"] .csa-feature:hover {
  border-color: var(--primary-600);
}

.csa-feature__media {
  position: relative;
  display: flex;
  align-items: center;
  padding: clamp(var(--space-4), 3vw, var(--space-6));
  background: var(--color-section);
  border-right: 1px solid var(--color-border);
}

.csa-feature__shot {
  display: block;
  max-width: 100%;
  height: auto;
  aspect-ratio: 1;
  object-fit: contain;
  object-position: center;
}

.csa-feature__badge {
  position: absolute;
  top: var(--space-3);
  left: var(--space-3);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-pill);
  background: var(--neutral-900);
  color: #FFFFFF;
  font-size: var(--font-size-small);
  font-weight: var(--weight-semibold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

[data-theme="dark"] .csa-feature__badge {
  background: #FFFFFF;
  color: var(--neutral-900);
}

.csa-feature__content {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(var(--space-5), 4vw, var(--space-7));
}

.csa-feature__index {
  margin: 0 0 var(--space-3);
  font-family: var(--font-code);
  font-size: var(--font-size-small);
  letter-spacing: 0.08em;
  color: var(--color-muted);
}

.csa-feature__client {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--font-size-small);
  font-weight: var(--weight-semibold);
  color: var(--color-heading);
}

.csa-feature__client img {
  width: 1.8rem;
  height: 1.8rem;
  padding: 0.2rem;
  border-radius: 50%;
  background: #FFFFFF;
  object-fit: contain;
  box-shadow: inset 0 0 0 1px rgba(15, 23, 42, 0.08);
}

.csa-feature__title {
  margin: 0 0 var(--space-3);
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 1.2vw + 1.25rem, var(--font-size-h3));
  font-weight: var(--weight-bold);
  line-height: var(--line-height-heading);
  letter-spacing: -0.01em;
  color: var(--color-heading);
  text-wrap: balance;
}

.csa-feature__desc {
  margin: 0 0 var(--space-4);
  font-size: var(--font-size-body);
  line-height: var(--line-height-body);
  color: var(--color-muted);
}

.csa-feature__desc--disclosure {
  font-size: var(--font-size-small);
}

.csa-feature__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: 0 0 var(--space-5);
  padding: 0;
  list-style: none;
}

.csa-feature__tags li {
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-section);
  font-size: 0.8125rem;
  font-weight: var(--weight-medium);
  line-height: 1.4;
  color: var(--color-text);
}

.csa-feature__meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2) var(--space-4);
  margin: 0 0 var(--space-5);
  padding: var(--space-3) 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.csa-feature__meta dt {
  font-size: 0.75rem;
  font-weight: var(--weight-semibold);
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.csa-feature__meta dd {
  margin: var(--space-1) 0 0;
  font-size: var(--font-size-small);
  line-height: 1.45;
  color: var(--color-heading);
}

.csa-feature__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
}

/* --------------------------------------------------------------------------
   15. Responsive refinements
   -------------------------------------------------------------------------- */
@media (max-width: 1199.98px) {
  .csp-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }

  .csp-hero__title {
    font-size: clamp(2.2rem, 1.2rem + 3.4vw, 3.5rem);
  }

  .csp-hero__archive {
    left: -0.6rem;
    width: min(42%, 240px);
  }

  .csp-arch {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .csp-arch::before {
    display: none;
  }

  .csp-jump__label {
    display: none;
  }
}

@media (max-width: 991.98px) {
  .csp-hero__grid,
  .csp-overview,
  .csp-context,
  .csp-home,
  .csp-motion,
  .csp-explorer,
  .csa-feature {
    grid-template-columns: minmax(0, 1fr);
  }

  .csp-hero__visual {
    max-width: 760px;
    margin-top: 1rem;
  }

  .csp-hero__archive {
    left: auto;
    right: 0.75rem;
    bottom: -1.1rem;
    width: min(38%, 230px);
  }

  .csp-hero__badge {
    right: 0.5rem;
  }

  .csp-context__figure {
    position: static;
  }

  .csp-grid--4,
  .csp-stats,
  .csp-stack {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .csp-outcome,
  .csp-related,
  .csa-standard__grid,
  .csp-responsive__notes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

  .csp-motion__stage {
    max-width: 640px;
  }

  .csa-feature__media {
    border-right: 0;
    border-bottom: 1px solid var(--color-border);
  }

  .csp-jump {
    top: var(--header-height-scrolled);
  }
}

@media (max-width: 767.98px) {
  .csp-hero {
    padding-block: clamp(2rem, 7vw, 3rem) clamp(2.25rem, 8vw, 3.5rem);
  }

  .csp-hero__title {
    max-width: 20ch;
  }

  .csp-hero__meta {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.7rem;
  }

  .csp-hero__meta-item {
    display: grid;
    grid-template-columns: 6.2rem minmax(0, 1fr);
    gap: 0.7rem;
    align-items: baseline;
  }

  .csp-hero__meta-item dt {
    margin: 0;
  }

  .csp-friction__item {
    grid-template-columns: 2rem minmax(0, 1fr);
  }

  .csp-friction__item .csp-tag {
    grid-column: 2;
    justify-self: start;
  }

  .csp-grid--2,
  .csp-grid--3,
  .csp-palette,
  .csp-type,
  .csp-quality-lists,
  .csp-evidence,
  .csp-facts-row,
  .csp-service-grid,
  .csp-brand-split,
  .csp-contrast {
    grid-template-columns: minmax(0, 1fr);
  }

  .csp-grid--4,
  .csp-stats,
  .csp-stack,
  .csp-outcome,
  .csp-related,
  .csp-responsive__notes,
  .csp-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .csp-arch {
    grid-template-columns: minmax(0, 1fr);
  }

  .csp-tabs {
    flex-direction: row;
    overflow-x: auto;
    padding-bottom: 0.25rem;
    scrollbar-width: none;
  }

  .csp-tabs::-webkit-scrollbar {
    display: none;
  }

  .csp-tab {
    flex: 0 0 auto;
    width: auto;
    grid-template-columns: auto auto;
    white-space: nowrap;
  }

  .csp-tab__count {
    display: none;
  }

  .csp-panel {
    min-height: 0;
  }

  .csp-device {
    min-height: 0;
    padding: 0.75rem;
  }

  .csp-device__frame[data-device="desktop"] {
    max-width: 100%;
  }

  .csp-compare__control {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .csp-compare__control label {
    grid-column: 1 / -1;
  }

  .csp-fullpage__scroll {
    max-height: 460px;
  }

  .csp-context__figure {
    order: 2;
  }

  .csp-context__body {
    order: 1;
  }

  .csa-feature__meta {
    grid-template-columns: minmax(0, 1fr);
  }

  .csp-jump__link {
    font-size: 0.7rem;
    padding: 0.34rem 0.52rem;
  }
}

@media (max-width: 575.98px) {
  .csp-hero__client {
    margin-bottom: 0.85rem;
  }

  .csp-hero__archive {
    display: none;
  }

  .csp-hero__badge {
    top: 0.55rem;
    right: 0.55rem;
    font-size: 0.56rem;
    padding: 0.3rem 0.5rem;
  }

  .csp-hero__actions {
    align-items: stretch;
    flex-direction: column;
  }

  .csp-hero__actions .site-btn {
    width: 100%;
  }

  .csp-hero__archive-link {
    align-self: center;
    margin: 0.25rem 0 0;
  }

  .csp-grid--4,
  .csp-stats,
  .csp-stack,
  .csp-outcome,
  .csp-related,
  .csp-responsive__notes,
  .csp-steps {
    grid-template-columns: minmax(0, 1fr);
  }

  .csp-facts-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .csp-service-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .csp-swatches {
    grid-template-columns: minmax(0, 1fr);
  }

  .csp-stat {
    padding: 0.85rem;
  }

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

  .csp-motion__rail {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .csp-motion__rail span:nth-child(n + 4) {
    display: none;
  }

  .csp-switch {
    width: 100%;
    overflow-x: auto;
  }

  .csp-switch__btn {
    flex: 1 0 auto;
  }

  .csp-compare__stage {
    aspect-ratio: 4 / 3;
  }

  .csp-compare__label {
    top: 0.5rem;
    font-size: 0.5rem;
  }

  .csp-compare__label--before {
    left: 0.5rem;
  }

  .csp-compare__label--after {
    right: 0.5rem;
  }

  .csp-compare__handle {
    width: 2.1rem;
    height: 2.1rem;
    font-size: 0.75rem;
  }

  .csa-feature__content {
    padding: 1.25rem;
  }

  .csp-hero__meta-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .csp-page *,
  .csa-page *,
  .csp-page *::before,
  .csa-page *::before,
  .csp-page *::after,
  .csa-page *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

@media print {
  .csp-jump,
  .csp-hero__badge,
  .csp-hero__archive {
    display: none !important;
  }

  .csp-section {
    break-inside: avoid;
  }
}