/* =============================================================================
   case.css — dedicated project case-study pages.

   Loaded after styles.css, so it inherits the design tokens, themes, and
   primitives (.btn, .chip, .icon, .reveal). Pattern: Scroll-Triggered
   Storytelling — Overview → Challenge → Approach → Outcome → Next.

   Each page sets --case-hue (derived from the project slug) so projects read
   as distinct without leaving the brand's teal→azure family.
   ========================================================================== */

.case {
  --case-accent: hsl(var(--case-hue) 70% 55%);
  --case-soft: hsl(var(--case-hue) 70% 55% / 0.12);
  --case-line: hsl(var(--case-hue) 70% 55% / 0.3);
  --case-glow: hsl(var(--case-hue) 80% 55% / 0.16);
}
[data-theme="light"] .case {
  --case-accent: hsl(var(--case-hue) 65% 34%);
  --case-soft: hsl(var(--case-hue) 65% 34% / 0.08);
  --case-line: hsl(var(--case-hue) 65% 34% / 0.26);
  --case-glow: hsl(var(--case-hue) 65% 40% / 0.1);
}

/* ==================================================== 01 BREADCRUMB === */
/* .crumbs itself now lives in styles.css — the blog uses it too. Only the
   case-page accent colour is set here. */
.crumbs a:hover { color: var(--case-accent); }

/* ========================================================== 02 HERO === */
.case-hero {
  position: relative;
  padding-block: clamp(2rem, 5vw, 3.5rem) clamp(2.5rem, 6vw, 4.5rem);
  overflow: hidden;
}
.case-hero::before {
  content: "";
  position: absolute;
  inset-block-start: -30vh;
  inset-inline-end: -10vw;
  inline-size: 60vw;
  block-size: 60vw;
  border-radius: 50%;
  background: radial-gradient(circle, var(--case-glow), transparent 68%);
  filter: blur(90px);
  pointer-events: none;
}

.case-hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

.case-hero__eyebrow {
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--case-accent);
  margin-block-end: var(--sp-3);
}

.case-hero__title {
  font-size: clamp(2.1rem, 1.4rem + 3.6vw, 4.2rem);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.02;
  margin-block-end: var(--sp-4);
}
html[lang="fa"] .case-hero__title { letter-spacing: 0; line-height: 1.25; }

.case-hero__summary {
  font-size: var(--fs-lg);
  color: var(--text-dim);
  max-inline-size: 54ch;
  margin-block-end: var(--sp-5);
}

/* fact strip */
.case-facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--sp-4);
  padding-block: var(--sp-4);
  border-block: 1px solid var(--border);
  margin-block-end: var(--sp-5);
}
.case-facts__item { min-inline-size: 0; }
.case-facts dt {
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-block-end: 0.25rem;
}
html[lang="fa"] .case-facts dt { letter-spacing: 0; text-transform: none; }
.case-facts dd {
  font-size: var(--fs-base);
  font-weight: 600;
  color: var(--text);
  overflow-wrap: anywhere;
}

.case-hero__cta { align-self: start; }

/* ------------------------------------------------------------- cover */
.case-cover {
  position: relative;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  aspect-ratio: 16 / 10;
  background: var(--surface);
  will-change: transform;
}
.case-cover img {
  inline-size: 100%;
  block-size: 100%;
  object-fit: cover;
}

/* Generated cover for projects without an uploaded image. */
.case-cover__generated {
  position: relative;
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 0.4rem;
  inline-size: 100%;
  block-size: 100%;
  padding: var(--sp-6);
  text-align: center;
  background:
    radial-gradient(ellipse at 70% 15%, var(--case-soft), transparent 60%),
    linear-gradient(150deg,
      hsl(var(--case-hue) 45% 12%) 0%,
      hsl(calc(var(--case-hue) + 22) 40% 9%) 100%);
}
[data-theme="light"] .case-cover__generated {
  background:
    radial-gradient(ellipse at 70% 15%, var(--case-soft), transparent 60%),
    linear-gradient(150deg,
      hsl(var(--case-hue) 30% 96%) 0%,
      hsl(calc(var(--case-hue) + 22) 32% 91%) 100%);
}

.case-cover__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, currentColor 1px, transparent 1px),
    linear-gradient(to bottom, currentColor 1px, transparent 1px);
  background-size: 48px 48px;
  color: var(--case-accent);
  opacity: 0.12;
  mask-image: radial-gradient(ellipse 70% 70% at 50% 40%, #000, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 70% 70% at 50% 40%, #000, transparent 75%);
}

.case-cover__mono {
  position: relative;
  display: grid;
  place-items: center;
  inline-size: clamp(56px, 8vw, 82px);
  block-size: clamp(56px, 8vw, 82px);
  border-radius: 20px;
  font-family: var(--font-latin);
  font-size: clamp(1.3rem, 2.4vw, 1.9rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #fff;
  background: linear-gradient(140deg,
    hsl(var(--case-hue) 72% 48%),
    hsl(calc(var(--case-hue) + 24) 70% 42%));
  box-shadow: 0 14px 34px -14px hsl(var(--case-hue) 70% 40% / 0.75);
  margin-block-end: var(--sp-2);
}

.case-cover__name {
  position: relative;
  font-size: clamp(1.15rem, 2.2vw, 1.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}
html[lang="fa"] .case-cover__name { letter-spacing: 0; }

.case-cover__tags {
  position: relative;
  font-family: var(--font-latin);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--case-accent);
}

/* ====================================================== 03 SECTIONS === */
.case-section { padding-block: clamp(2.75rem, 7vw, 5rem); position: relative; }
.case-section--alt { background: var(--bg-alt); }
.case-section--alt::before,
.case-section--alt::after {
  content: "";
  position: absolute;
  inset-inline: 0;
  block-size: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}
.case-section--alt::before { inset-block-start: 0; }
.case-section--alt::after { inset-block-end: 0; }

.case-eyebrow {
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--case-accent);
  margin-block-end: var(--sp-5);
}
html[lang="fa"] .case-eyebrow { letter-spacing: 0; text-transform: none; font-size: var(--fs-sm); }

.case-title {
  font-size: var(--fs-2xl);
  letter-spacing: -0.02em;
  margin-block-end: clamp(1.5rem, 4vw, var(--sp-6));
}
html[lang="fa"] .case-title { letter-spacing: 0; }

/* ------------------------------------------------------------ metrics */
.metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
}
.metrics li {
  background: var(--surface);
  padding: clamp(1.1rem, 3vw, 1.75rem) var(--sp-4);
  text-align: center;
  transition: background-color 0.25s var(--ease);
}
.metrics li:hover { background: var(--surface-2); }
.metrics__value {
  display: block;
  font-size: clamp(1.6rem, 1.1rem + 2vw, 2.6rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--case-accent);
  font-variant-numeric: tabular-nums;
}
.metrics__label {
  display: block;
  font-size: var(--fs-sm);
  color: var(--text-dim);
  margin-block-start: 0.35rem;
}

/* ---------------------------------------------------------- chapters */
.case-story .wrap { display: grid; gap: clamp(2rem, 5vw, 3.5rem); }

.chapter {
  display: grid;
  grid-template-columns: minmax(0, 0.42fr) minmax(0, 1fr);
  gap: clamp(1.25rem, 4vw, 3rem);
  align-items: start;
  padding-block-start: var(--sp-5);
  border-block-start: 1px solid var(--border);
}
.chapter:first-child { border-block-start: none; padding-block-start: 0; }

.chapter__aside {
  position: sticky;
  inset-block-start: calc(var(--header-h) + var(--sp-5));
  display: grid;
  gap: 0.5rem;
}
.chapter__num {
  font-family: var(--font-latin);
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--case-accent);
  background: var(--case-soft);
  border: 1px solid var(--case-line);
  border-radius: var(--r-full);
  padding: 0.18rem 0.6rem;
  justify-self: start;
}
.chapter__title {
  font-size: var(--fs-xl);
  letter-spacing: -0.02em;
}
html[lang="fa"] .chapter__title { letter-spacing: 0; }

.chapter__body { display: grid; gap: var(--sp-4); }
.chapter__body p {
  font-size: var(--fs-lg);
  color: var(--text-dim);
  max-inline-size: 72ch;
}
.chapter__body p:first-child { color: var(--text); }

/* -------------------------------------------------------- highlights */
.builds {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr));
  gap: var(--sp-4);
  counter-reset: build;
}
.builds li {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--sp-3);
  align-items: start;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: var(--sp-4) var(--sp-5);
  overflow: hidden;
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease-out);
}
.builds li::before {
  content: "";
  position: absolute;
  inset-block-start: 0;
  inset-inline: 0;
  block-size: 2px;
  background: linear-gradient(90deg, var(--case-accent), transparent);
  opacity: 0;
  transition: opacity 0.25s var(--ease);
}
.builds li:hover {
  border-color: var(--case-line);
  transform: translateY(-3px);
}
.builds li:hover::before { opacity: 1; }

.builds__num {
  display: grid;
  place-items: center;
  inline-size: 26px;
  block-size: 26px;
  border-radius: 50%;
  font-family: var(--font-latin);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--case-accent);
  background: var(--case-soft);
  border: 1px solid var(--case-line);
  flex: none;
}
.builds p { font-size: var(--fs-base); color: var(--text-dim); }

/* ----------------------------------------------------------- gallery */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 340px), 1fr));
  gap: var(--sp-4);
}
.gallery li { display: grid; gap: 0.5rem; }
.gallery__btn {
  position: relative;
  display: block;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--r);
  overflow: hidden;
  background: var(--surface);
  cursor: zoom-in;
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease-out),
              box-shadow 0.25s var(--ease);
}
.gallery__btn img {
  inline-size: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  display: block;
  transition: transform 0.4s var(--ease-out);
}
.gallery__btn:hover {
  border-color: var(--case-line);
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}
.gallery__btn:hover img { transform: scale(1.04); }

.gallery__zoom {
  position: absolute;
  inset-block-end: 0.6rem;
  inset-inline-end: 0.6rem;
  display: grid;
  place-items: center;
  inline-size: 36px;
  block-size: 36px;
  border-radius: var(--r-sm);
  background: rgba(0, 0, 0, 0.55);
  color: #fff;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  opacity: 0;
  transition: opacity 0.25s var(--ease);
}
.gallery__btn:hover .gallery__zoom,
.gallery__btn:focus-visible .gallery__zoom { opacity: 1; }
.gallery figcaption { font-size: var(--fs-sm); color: var(--text-faint); }

/* --------------------------------------------------------- lightbox */
.lightbox {
  border: none;
  padding: 0;
  max-inline-size: min(94vw, 1200px);
  max-block-size: 92vh;
  background: transparent;
  color: var(--text);
  overflow: visible;
}
.lightbox::backdrop {
  background: rgba(0, 0, 0, 0.82);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}
.lightbox figure { display: grid; gap: var(--sp-3); }
.lightbox img {
  inline-size: 100%;
  max-block-size: 80vh;
  object-fit: contain;
  border-radius: var(--r);
  background: var(--surface);
}
.lightbox figcaption {
  text-align: center;
  font-size: var(--fs-sm);
  color: #d6dee6;
}
.lightbox__close {
  position: absolute;
  inset-block-start: -46px;
  inset-inline-end: 0;
  display: grid;
  place-items: center;
  inline-size: 44px;
  block-size: 44px;
  border-radius: var(--r-full);
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.22);
  transition: background-color 0.2s var(--ease);
}
.lightbox__close:hover { background: rgba(255, 255, 255, 0.24); }

/* ============================================================ 04 NEXT === */
/* .pager itself now lives in styles.css — the blog uses it too. Only the
   case-page accent hover is set here. */
.pager__link:hover { border-color: var(--case-line); }

/* ---------------------------------------------------------- related */
.related {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr));
  gap: var(--sp-3);
  margin-block-end: clamp(2rem, 5vw, var(--sp-7));
}
.related a {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: 0.8rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--r);
  background: var(--surface);
  color: var(--text);
  transition: border-color 0.25s var(--ease), background-color 0.25s var(--ease);
}
.related a:hover {
  border-color: var(--case-line);
  background: var(--surface-2);
  color: var(--text);
}
.related__swatch {
  display: grid;
  place-items: center;
  inline-size: 40px;
  block-size: 40px;
  border-radius: 12px;
  flex: none;
  font-family: var(--font-latin);
  font-size: 0.8rem;
  font-weight: 800;
  color: #fff;
  background: linear-gradient(140deg,
    hsl(var(--case-hue) 72% 48%),
    hsl(calc(var(--case-hue) + 24) 70% 42%));
}
.related__body { display: grid; min-inline-size: 0; flex: 1; }
.related__body strong { font-size: var(--fs-base); }
.related__body span {
  font-size: var(--fs-sm);
  color: var(--text-faint);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.related .icon { inline-size: 16px; block-size: 16px; color: var(--text-faint); flex: none; }

/* -------------------------------------------------------------- cta */
.case-cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-4);
  align-items: center;
  justify-content: space-between;
  padding: clamp(1.25rem, 4vw, var(--sp-6));
  border: 1px solid var(--case-line);
  border-radius: var(--r-lg);
  background:
    radial-gradient(ellipse at 15% 0%, var(--case-soft), transparent 70%),
    var(--surface);
}
.case-cta p {
  font-size: var(--fs-xl);
  font-weight: 600;
  letter-spacing: -0.01em;
  max-inline-size: 34ch;
}
html[lang="fa"] .case-cta p { letter-spacing: 0; }
.case-cta__actions { display: flex; flex-wrap: wrap; gap: var(--sp-3); }

/* ====================================================== 05 RESPONSIVE === */
@media (max-width: 980px) {
  .case-hero__inner { grid-template-columns: minmax(0, 1fr); }
  .case-hero__text { order: 1; }
  .case-cover { order: 0; }
  .chapter { grid-template-columns: minmax(0, 1fr); gap: var(--sp-3); }
  .chapter__aside { position: static; }
}

@media (max-width: 620px) {
  .case-cta { flex-direction: column; align-items: flex-start; }
  .case-cta__actions .btn { flex: 1 1 100%; }
  .lightbox__close { inset-block-start: auto; inset-block-end: -52px; inset-inline: auto 50%; translate: 50% 0; }
}

@media (prefers-reduced-motion: reduce) {
  /* Parallax is applied via inline transform in JS; neutralise it here too. */
  .case-cover { transform: none !important; }
  .gallery__btn img { transition: none; }
}

/* =========================================================== 06 PRINT === */
@media print {
  /* The whole "More work" section goes — hiding only its contents left an
     orphaned heading with nothing under it. */
  .crumbs, .gallery__zoom, .lightbox, .case-next,
  .case-hero__cta { display: none !important; }

  .case-hero { padding-block: 0 0.8rem; }
  .case-hero::before { display: none; }
  .case-hero__inner { grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 1rem; }
  .case-hero__title { font-size: 20pt; }
  .case-hero__summary { font-size: 10pt; }

  .case-cover { box-shadow: none; border-color: #ddd; aspect-ratio: 16 / 11; }
  .case-cover__generated { background: #fff; border: none; }
  .case-cover__grid { display: none; }
  .case-cover__mono { background: #0f766e; box-shadow: none; }

  .case-section { padding-block: 0.7rem; }
  .case-section--alt::before, .case-section--alt::after { display: none; }
  .case-title { font-size: 13pt; }
  .case-eyebrow { font-size: 8pt; }

  .metrics { border-color: #ccc; }
  .metrics li { background: #fff; padding: 0.5rem; }
  .metrics__value { font-size: 14pt; color: #0f766e; }

  .chapter { grid-template-columns: minmax(0, 0.35fr) minmax(0, 1fr); break-inside: avoid; }
  .chapter__aside { position: static; }
  .chapter__body p { font-size: 9.5pt; }

  .builds { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.4rem; }
  .builds li { border-color: #ddd; padding: 0.5rem 0.7rem; break-inside: avoid; }
  .builds li::before { display: none; }

  .gallery { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0.4rem; }
  .gallery__btn { border-color: #ddd; }
}