/* ==========================================================================
   Abir Al Zubayer Portfolio
   projects.css

   Styles for the Projects-section additions on index.html and for the
   project.html case-study template rendered by assets/js/project-detail.js.
   Every value comes from the design tokens in base.css.

   1. Shared primitives
   2. Projects section additions (index.html)
   3. Case-study page hero
   4. Case-study page layout and contents rail
   5. Case-study page content blocks
   6. Case-study page footer navigation and fallbacks
   7. Responsive
   8. Reduced motion / print
   ========================================================================== */

/* ------------------------------------------------------------------ 1. */

.card-chips,
.case-chips {
  position: relative;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.card-chip,
.case-chip {
  display: inline-block;
  padding: 0.28rem 0.65rem;
  border: 1px solid var(--line-2);
  border-radius: var(--r-pill);
  background: rgb(var(--fg-rgb) / 3.5%);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  line-height: 1.4;
  color: var(--text-2);
  white-space: nowrap;
  transition: border-color 0.3s var(--ease), color 0.3s var(--ease);
}

.work-card:hover .card-chip,
.article-card:hover .card-chip {
  border-color: var(--line-3);
  color: var(--text);
}

/* ------------------------------------------------------------------ 2. */

.featured__lead {
  max-width: 62ch;
  margin: 0 auto clamp(2rem, 1.2rem + 3vw, 3.25rem);
  font-size: var(--fs-lead);
  line-height: 1.7;
  color: var(--text-2);
  text-align: center;
}

.featured__eyebrow {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold-text);
  text-align: center;
  margin-bottom: var(--sp-4);
}

.featured__eyebrow::before,
.featured__eyebrow::after {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--gold);
  opacity: 0.6;
}

.work-card .work-card__kicker {
  font-family: var(--font-mono);
  font-size: var(--fs-2xs);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gold-text);
}

/* Compact index of every case study, closing out the Projects region. */
.case-strip {
  margin-top: clamp(2.5rem, 1.5rem + 3vw, 4rem);
  padding: clamp(1.25rem, 0.8rem + 2vw, 2.25rem);
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  background: linear-gradient(180deg, rgb(var(--fg-rgb) / 2.5%), transparent);
}

.case-strip__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--sp-4);
  flex-wrap: wrap;
  margin-bottom: clamp(1rem, 0.8rem + 0.8vw, 1.5rem);
}

.case-strip__title {
  font-size: var(--fs-h3);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--heading);
}

.case-strip__note {
  font-size: var(--fs-sm);
  color: var(--text-3);
  max-width: 52ch;
}

.case-strip__list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 250px), 1fr));
  gap: clamp(0.5rem, 0.35rem + 0.6vw, 0.85rem);
  margin: 0;
  padding: 0;
  list-style: none;
}

.case-strip__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.875rem;
  height: 100%;
  padding: 0.85rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--surface);
  text-decoration: none;
  transition: border-color 0.3s var(--ease), transform 0.4s var(--ease), background-color 0.3s var(--ease),
    box-shadow 0.4s var(--ease);
}

.case-strip__link:hover,
.case-strip__link:focus-visible {
  border-color: var(--gold-a40);
  background: var(--surface-2);
  transform: translateY(-3px);
  box-shadow: 0 16px 30px -18px rgb(var(--shadow-rgb) / calc(80% * var(--shadow-k)));
}

.case-strip__num {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 9px;
  border: 1px solid var(--gold-a20);
  background: var(--gold-a10);
  font-family: var(--font-mono);
  font-size: var(--fs-2xs);
  font-weight: 500;
  color: var(--gold-text);
  transition: background-color 0.3s var(--ease), color 0.3s var(--ease);
}

.case-strip__link:hover .case-strip__num {
  background: var(--gold);
  color: #121212;
}

.case-strip__name {
  display: block;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--heading);
  line-height: 1.35;
}

.case-strip__kind {
  display: block;
  margin-top: 0.15rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  color: var(--text-3);
}

.case-strip__arrow {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: var(--text-3);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform 0.35s var(--ease), stroke 0.3s var(--ease);
}

.case-strip__link:hover .case-strip__arrow,
.case-strip__link:focus-visible .case-strip__arrow {
  stroke: var(--gold);
  transform: translate(3px, -3px);
}

/* ------------------------------------------------------------------ 3. */

.case-page {
  padding-top: clamp(1.5rem, 1rem + 2vw, 2.5rem);
}

.case-hero {
  position: relative;
  border-radius: var(--r-2xl);
  border: 1px solid var(--line);
  background:
    radial-gradient(60% 70% at 100% 0%, rgb(244 163 0 / 13%), transparent 60%),
    radial-gradient(50% 60% at 0% 100%, rgb(129 236 255 / 7%), transparent 60%),
    linear-gradient(180deg, var(--surface), var(--bg-2));
  color: var(--text);
  overflow: hidden;
  isolation: isolate;
  padding: clamp(1.5rem, 1rem + 3.4vw, 4.5rem);
}

.case-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image: linear-gradient(rgb(var(--fg-rgb) / 4%) 1px, transparent 1px),
    linear-gradient(90deg, rgb(var(--fg-rgb) / 4%) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(120deg, transparent 30%, #000 100%);
  -webkit-mask-image: linear-gradient(120deg, transparent 30%, #000 100%);
  pointer-events: none;
}

.case-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: clamp(1.5rem, 1rem + 3vw, 3.5rem);
  align-items: center;
}

.case-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: var(--fs-2xs);
  color: var(--text-3);
  margin-bottom: var(--sp-5);
}

.case-crumbs a {
  color: var(--text-2);
  text-decoration: none;
  transition: color 0.25s var(--ease);
}

.case-crumbs a:hover,
.case-crumbs a:focus-visible {
  color: var(--gold-text);
}

.case-crumbs__sep {
  opacity: 0.5;
}

.case-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.8rem;
  border: 1px solid var(--gold-a40);
  border-radius: var(--r-pill);
  background: var(--gold-a10);
  font-family: var(--font-mono);
  font-size: var(--fs-2xs);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold-text);
  margin-bottom: var(--sp-4);
}

.case-hero__eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 8px var(--gold);
}

.case-hero__title {
  font-size: clamp(2rem, 1rem + 3.6vw, 3.75rem);
  font-weight: 800;
  line-height: 1.04;
  letter-spacing: -0.045em;
  color: var(--heading);
}

.case-hero__lead {
  margin-top: var(--sp-5);
  max-width: 58ch;
  font-size: var(--fs-lead);
  line-height: 1.75;
  color: var(--text-2);
}

.case-hero__tags {
  margin-top: clamp(1.25rem, 0.9rem + 1.2vw, 1.75rem);
}

.case-hero__media {
  position: relative;
  border-radius: var(--r-lg);
  border: 1px solid var(--line-2);
  overflow: hidden;
  background: rgb(var(--fg-rgb) / 4%);
  box-shadow: 0 40px 80px -30px rgb(var(--shadow-rgb) / calc(90% * var(--shadow-k))), 0 0 60px -20px rgb(244 163 0 / 25%);
}

.case-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  transition: transform 1.2s var(--ease);
}

.case-hero__media:hover img {
  transform: scale(1.04);
}

.case-facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 170px), 1fr));
  gap: clamp(0.6rem, 0.4rem + 0.8vw, 1rem);
  margin-top: clamp(1.75rem, 1.2rem + 2.4vw, 3rem);
}

.case-fact {
  padding: 1rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: rgb(var(--fg-rgb) / 3%);
  transition: border-color 0.3s var(--ease);
}

.case-fact:hover {
  border-color: var(--gold-a40);
}

.case-fact__label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-3);
}

.case-fact__value {
  margin: 0.4rem 0 0;
  font-size: var(--fs-body);
  font-weight: 600;
  color: var(--heading);
}

/* ------------------------------------------------------------------ 4. */

.case-layout {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: clamp(1.75rem, 1rem + 3.4vw, 4.5rem);
  padding-block: clamp(2.5rem, 1.6rem + 4vw, 5rem);
  align-items: start;
}

.case-toc {
  position: sticky;
  top: calc(var(--header-h) + 24px);
  padding: 1.1rem;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: rgb(var(--fg-rgb) / 2.5%);
}

.case-toc__title {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: var(--sp-3);
}

.case-toc__list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-left: 1px solid var(--line-2);
  counter-reset: toc;
}

.case-toc__list a {
  display: block;
  position: relative;
  padding: 0.45rem 0 0.45rem 0.9rem;
  margin-left: -1px;
  border-left: 2px solid transparent;
  font-size: var(--fs-sm);
  line-height: 1.45;
  color: var(--text-3);
  text-decoration: none;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease), padding 0.35s var(--ease);
}

.case-toc__list a:hover,
.case-toc__list a:focus-visible {
  color: var(--text);
  padding-left: 1.1rem;
}

.case-toc__list a.is-current {
  border-left-color: var(--gold);
  color: var(--heading);
  font-weight: 600;
}

.case-goal {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 1rem;
  padding: clamp(1.1rem, 0.8rem + 1vw, 1.6rem);
  border: 1px solid var(--gold-a20);
  border-radius: var(--r-lg);
  background: radial-gradient(80% 140% at 0% 0%, rgb(244 163 0 / 12%), transparent 60%), rgb(244 163 0 / 4%);
  margin-bottom: clamp(2rem, 1.4rem + 2.4vw, 3.25rem);
}

.case-goal__icon {
  width: 40px;
  height: 40px;
  padding: 9px;
  border-radius: 12px;
  background: var(--gold-a10);
  fill: none;
  stroke: var(--gold);
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.case-goal__label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold-text);
}

.case-goal__text {
  margin-top: 0.4rem;
  font-size: var(--fs-lead);
  font-weight: 600;
  line-height: 1.6;
  color: var(--heading);
}

/* ------------------------------------------------------------------ 5. */

.case-section + .case-section {
  margin-top: clamp(2.5rem, 1.6rem + 3.4vw, 4.25rem);
  padding-top: clamp(2.5rem, 1.6rem + 3.4vw, 4.25rem);
  border-top: 1px solid var(--line);
}

.case-section__head {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  margin-bottom: clamp(1.25rem, 0.9rem + 1.2vw, 1.75rem);
}

.case-section__num {
  display: grid;
  place-items: center;
  min-width: 38px;
  height: 30px;
  padding-inline: 0.4rem;
  border-radius: 8px;
  border: 1px solid var(--gold-a20);
  background: var(--gold-a10);
  font-family: var(--font-mono);
  font-size: var(--fs-2xs);
  font-weight: 500;
  color: var(--gold-text);
  font-variant-numeric: tabular-nums;
}

.case-section__title {
  font-size: clamp(1.4rem, 1.05rem + 1.4vw, 2.15rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.035em;
  color: var(--heading);
}

.case-body > * + * {
  margin-top: clamp(1rem, 0.85rem + 0.7vw, 1.5rem);
}

.case-p {
  font-size: var(--fs-lead);
  line-height: 1.8;
  color: var(--text-2);
  max-width: 72ch;
}

.case-p strong {
  color: var(--heading);
  font-weight: 600;
}

.case-p em {
  color: var(--text);
}

.case-p code,
.case-li code {
  padding: 0.12em 0.4em;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: var(--surface-3);
  font-size: 0.85em;
  color: var(--gold-text-hi);
}

.case-h {
  margin-top: clamp(1.75rem, 1.3rem + 1.6vw, 2.5rem) !important;
  font-size: var(--fs-h3);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -0.02em;
  color: var(--heading);
}

.case-quote {
  position: relative;
  padding: clamp(1.1rem, 0.8rem + 1vw, 1.6rem) clamp(1.25rem, 0.9rem + 1.2vw, 2rem);
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  background: linear-gradient(90deg, rgb(244 163 0 / 7%), transparent 70%);
  font-size: var(--fs-lead);
  font-weight: 600;
  line-height: 1.65;
  color: var(--heading);
}

.case-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.75rem;
  max-width: 76ch;
}

.case-li {
  position: relative;
  padding-left: 1.75rem;
  font-size: var(--fs-body);
  line-height: 1.75;
  color: var(--text-2);
}

/* Chevron bullet, like a shell prompt */
.case-li::before {
  content: '';
  position: absolute;
  left: 0.2rem;
  top: 0.62em;
  width: 7px;
  height: 7px;
  border-top: 2px solid var(--gold);
  border-right: 2px solid var(--gold);
  transform: rotate(45deg);
}

.case-li strong {
  color: var(--heading);
  font-weight: 600;
}

.case-flow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.case-flow__step {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.case-flow__label {
  display: inline-block;
  padding: 0.45rem 0.9rem;
  border: 1px solid var(--line-2);
  border-radius: var(--r-pill);
  background: var(--surface-2);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: 500;
  color: var(--heading);
  white-space: nowrap;
  transition: border-color 0.3s var(--ease), background-color 0.3s var(--ease), transform 0.35s var(--ease);
}

.case-flow__label:hover {
  border-color: var(--gold-a40);
  background: var(--gold-a10);
  transform: translateY(-2px);
}

.case-flow__step:not(:last-child)::after {
  content: '';
  width: 16px;
  height: 8px;
  background: linear-gradient(90deg, var(--gold-a40), var(--gold));
  clip-path: polygon(0 34%, 58% 34%, 58% 0, 100% 50%, 58% 100%, 58% 66%, 0 66%);
  flex: none;
}

/* ASCII diagrams render as a terminal window */
.case-dia {
  border: 1px solid var(--line-2);
  border-radius: var(--r-md);
  background: #0a0c10;
  overflow: hidden;
  box-shadow: var(--sh-md);
}

.case-dia__label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem clamp(0.875rem, 0.7rem + 0.6vw, 1.25rem);
  border-bottom: 1px solid var(--line);
  background: rgb(var(--fg-rgb) / 3%);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-3);
}

/* Traffic-light dots */
.case-dia__label::before {
  content: '';
  width: 9px;
  height: 9px;
  margin-right: 2.4rem;
  border-radius: 50%;
  background: #ff5f57;
  box-shadow: 14px 0 0 #febc2e, 28px 0 0 #28c840;
  flex: none;
}

/* System mono on purpose: the web-font subset lacks box-drawing glyphs, and
   mixing fonts breaks the diagram grid. */
.case-dia__pre {
  margin: 0;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  padding: clamp(0.875rem, 0.7rem + 0.8vw, 1.5rem);
  overflow-x: auto;
  font-size: clamp(0.6875rem, 0.64rem + 0.2vw, 0.8125rem);
  line-height: 1.6;
  color: #cfd6e2;
  tab-size: 2;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 258px), 1fr));
  gap: clamp(0.75rem, 0.5rem + 1vw, 1.1rem);
}

.case-grid__item {
  padding: clamp(1.1rem, 0.9rem + 0.7vw, 1.5rem);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: linear-gradient(180deg, var(--surface-2), var(--surface));
  transition: border-color 0.3s var(--ease), box-shadow 0.4s var(--ease), transform 0.4s var(--ease);
}

.case-grid__item:hover {
  border-color: var(--gold-a40);
  box-shadow: 0 20px 40px -24px rgb(var(--shadow-rgb) / calc(85% * var(--shadow-k)));
  transform: translateY(-3px);
}

.case-grid__title {
  position: relative;
  z-index: 2;
  font-size: var(--fs-body);
  font-weight: 700;
  line-height: 1.4;
  color: var(--heading);
}

.case-grid__text {
  position: relative;
  z-index: 2;
  margin-top: 0.5rem;
  font-size: var(--fs-sm);
  line-height: 1.7;
  color: var(--text-2);
}

.case-groups {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 288px), 1fr));
  gap: clamp(0.875rem, 0.6rem + 1vw, 1.25rem);
}

.case-group {
  padding: clamp(1.1rem, 0.9rem + 0.7vw, 1.5rem);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--surface);
}

.case-group__title {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold-text);
  margin-bottom: 0.8rem;
}

.case-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 168px), 1fr));
  gap: clamp(0.625rem, 0.4rem + 0.8vw, 1rem);
}

.case-stat {
  position: relative;
  padding: clamp(1rem, 0.85rem + 0.6vw, 1.35rem);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: linear-gradient(180deg, rgb(244 163 0 / 6%), transparent 80%), var(--surface);
  overflow: hidden;
}

.case-stat::before {
  content: '';
  position: absolute;
  inset: 0 0 auto;
  height: 2px;
  background: linear-gradient(90deg, var(--gold), transparent);
}

.case-stat__value {
  font-size: clamp(1.25rem, 1rem + 0.9vw, 1.75rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--heading);
}

.case-stat__key {
  margin-top: 0.4rem;
  font-size: var(--fs-xs);
  line-height: 1.5;
  color: var(--text-3);
}

.case-note {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.75rem;
  padding: clamp(0.9rem, 0.75rem + 0.6vw, 1.25rem);
  border: 1px dashed var(--line-2);
  border-radius: var(--r-md);
  background: rgb(129 236 255 / 3%);
  font-size: var(--fs-sm);
  line-height: 1.7;
  color: var(--text-2);
}

.case-note__icon {
  width: 18px;
  height: 18px;
  margin-top: 3px;
  fill: none;
  stroke: var(--cyan);
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ------------------------------------------------------------------ 6. */

.case-source {
  margin-top: clamp(2rem, 1.4rem + 2.4vw, 3rem);
  padding-top: clamp(1.25rem, 0.9rem + 1.6vw, 2rem);
  border-top: 1px solid var(--line);
  font-size: var(--fs-sm);
  line-height: 1.7;
  color: var(--text-3);
}

.case-source code {
  padding: 0.12em 0.4em;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: var(--surface-3);
  font-size: 0.85em;
  color: var(--text);
}

.case-pager {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
  gap: clamp(0.75rem, 0.5rem + 1vw, 1.25rem);
  padding-bottom: clamp(2.5rem, 1.6rem + 4vw, 5rem);
}

.case-pager__link {
  position: relative;
  display: block;
  padding: clamp(1.25rem, 1rem + 1vw, 1.75rem);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(180deg, var(--surface-2), var(--surface));
  text-decoration: none;
  overflow: hidden;
  transition: border-color 0.3s var(--ease), transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
}

.case-pager__link:hover,
.case-pager__link:focus-visible {
  border-color: var(--gold-a40);
  transform: translateY(-4px);
  box-shadow: var(--sh-card);
}

.case-pager__dir {
  position: relative;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold-text);
}

.case-pager__link--prev .case-pager__dir::before {
  content: '\2190';
  transition: transform 0.35s var(--ease);
}

.case-pager__link--next .case-pager__dir::after {
  content: '\2192';
  transition: transform 0.35s var(--ease);
}

.case-pager__link--prev:hover .case-pager__dir::before {
  transform: translateX(-4px);
}

.case-pager__link--next:hover .case-pager__dir::after {
  transform: translateX(4px);
}

.case-pager__name {
  position: relative;
  z-index: 2;
  display: block;
  margin-top: 0.6rem;
  font-size: var(--fs-h3);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.3;
  color: var(--heading);
}

.case-pager__kind {
  position: relative;
  z-index: 2;
  display: block;
  margin-top: 0.375rem;
  font-size: var(--fs-sm);
  color: var(--text-3);
}

.case-pager__link--next {
  text-align: right;
}

.case-fallback {
  padding-block: clamp(3rem, 2rem + 5vw, 6rem);
  text-align: center;
}

.case-fallback__title {
  font-size: var(--fs-h2);
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--heading);
}

.case-fallback__text {
  max-width: 56ch;
  margin: var(--sp-4) auto 0;
  font-size: var(--fs-lead);
  line-height: 1.75;
  color: var(--text-2);
}

/* "Loading project…" placeholder shimmer */
.case-fallback__text:only-child {
  color: var(--text-3);
  animation: loading-pulse 1.4s var(--ease-in-out) infinite alternate;
}

@keyframes loading-pulse {
  to {
    opacity: 0.4;
  }
}

.case-fallback__list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr));
  gap: clamp(0.625rem, 0.4rem + 0.8vw, 1rem);
  max-width: 900px;
  margin: clamp(1.75rem, 1.2rem + 2.4vw, 2.75rem) auto 0;
  padding: 0;
  list-style: none;
  text-align: left;
}

.case-fallback__actions {
  margin-top: clamp(1.75rem, 1.2rem + 2.4vw, 2.5rem);
  display: flex;
  justify-content: center;
}

.case-noscript {
  padding-block: clamp(2rem, 1.4rem + 2.6vw, 3.5rem);
}

.case-noscript__list {
  display: grid;
  gap: clamp(0.75rem, 0.5rem + 1vw, 1.25rem);
  margin: clamp(1.25rem, 0.9rem + 1.6vw, 2rem) 0 0;
  padding: 0;
  list-style: none;
}

.case-noscript__list h2 {
  font-size: var(--fs-h3);
  font-weight: 700;
  color: var(--heading);
}

.case-noscript__list p {
  margin-top: 0.5rem;
  font-size: var(--fs-sm);
  line-height: 1.7;
  color: var(--text-2);
}

.case-noscript a {
  color: var(--gold-text);
}

/* ------------------------------------------------------------------ 7. */

@media (max-width: 1000px) {
  .case-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .case-toc {
    position: static;
    top: auto;
  }

  .case-toc__list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem 0.4rem;
    border-left: 0;
  }

  .case-toc__list a,
  .case-toc__list a:hover {
    padding: 0.375rem 0.8rem;
    margin-left: 0;
    border: 1px solid var(--line-2);
    border-radius: var(--r-pill);
    background: var(--surface);
    font-size: var(--fs-xs);
  }

  .case-toc__list a.is-current {
    border-color: var(--gold);
    background: var(--gold-a10);
  }
}

@media (max-width: 900px) {
  .case-hero__grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .case-hero__media {
    order: -1;
    max-width: 560px;
  }
}

@media (max-width: 760px) {
  .case-strip__head {
    display: block;
  }

  .case-strip__note {
    margin-top: 0.5rem;
  }

  .case-pager__link--next {
    text-align: left;
  }
}

@media (max-width: 520px) {
  .case-hero {
    border-radius: var(--r-lg);
  }

  .case-section__head {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.6rem;
  }

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

  .case-goal__icon {
    display: none;
  }

  .case-dia__pre {
    font-size: 0.625rem;
  }
}

/* ------------------------------------------------------------------ 8. */

@media (prefers-reduced-motion: reduce) {

  .case-strip__link,
  .case-strip__arrow,
  .case-pager__link,
  .case-grid__item {
    transition: none;
  }

  .case-strip__link:hover,
  .case-strip__link:focus-visible,
  .case-pager__link:hover,
  .case-pager__link:focus-visible,
  .case-grid__item:hover {
    transform: none;
  }
}

@media print {
  :root {
    --heading: #111;
    --text: #222;
    --text-2: #333;
    --text-3: #555;
  }

  body {
    background: #fff;
  }

  .site-header,
  .footer,
  .case-toc,
  .case-pager {
    display: none;
  }

  .case-hero {
    background: none;
    border: 0;
    padding: 0;
  }

  .case-hero::after {
    display: none;
  }

  .case-dia {
    background: #fff;
  }

  .case-dia__pre {
    white-space: pre-wrap;
    color: #111;
  }
}