/* ============================================================
   /portfolio/case-studies
   The Turn Group case studies showcase.
   Visual: bold modern editorial, Inter, no large radii, no serif.
   ============================================================ */

:root {
  --cs-ink: #0d0f12;
  --cs-ink-2: #2a2d33;
  --cs-muted: #6a6f78;
  --cs-line: #e6e8ec;
  --cs-card: #ffffff;
  --cs-bg: #f5f6f8;
  --cs-accent: #ff6b00;
  --cs-accent-2: #1a73e8;
  --cs-dark: #0d0f12;
  --cs-good: #1e9e5e;
}

.cs-wrap {
  background: var(--cs-bg);
  color: var(--cs-ink);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "ss01", "cv11";
}

.cs-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
}
.cs-section {
  padding: 88px 0;
}

/* ============================================================
   1. HERO (dark, editorial)
   ============================================================ */
.cs-hero {
  background:
    radial-gradient(900px 500px at 80% 20%, rgba(255, 107, 0, 0.18), transparent 60%),
    radial-gradient(700px 400px at 10% 80%, rgba(26, 115, 232, 0.14), transparent 60%),
    linear-gradient(135deg, #0a0c0f 0%, #14171c 100%);
  color: #fff;
  padding: 120px 0 96px;
  position: relative;
  overflow: hidden;
}
.cs-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
}
.cs-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 56px;
  align-items: center;
}
.cs-hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(255, 107, 0, 0.18);
  color: #ffae6b;
  border: 1px solid rgba(255, 107, 0, 0.4);
  border-radius: 999px;
  font: 700 0.78rem/1 'Inter', sans-serif;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 22px;
}
.cs-hero h1 {
  font: 800 clamp(2.4rem, 5.5vw, 4.4rem)/1.02 'Inter', sans-serif;
  letter-spacing: -0.03em;
  margin: 0 0 22px;
  color: #fff;
}
.cs-hero h1 strong {
  background: linear-gradient(120deg, #ff6b00 0%, #ffb070 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-weight: 800;
}
.cs-hero p {
  font: 400 1.18rem/1.6 'Inter', sans-serif;
  color: rgba(255, 255, 255, 0.78);
  max-width: 620px;
  margin: 0 0 32px;
}
.cs-hero-kpis {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.cs-hero-kpi {
  border-left: 3px solid var(--cs-accent);
  padding: 4px 0 4px 14px;
}
.cs-hero-kpi-num {
  font: 800 1.8rem/1 'Inter', sans-serif;
  color: #fff;
  letter-spacing: -0.02em;
}
.cs-hero-kpi-lbl {
  font: 500 0.84rem/1.3 'Inter', sans-serif;
  color: rgba(255, 255, 255, 0.6);
  margin-top: 6px;
  letter-spacing: 0.02em;
}

/* Hero stack of logo tiles (right column) */
.cs-hero-tiles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.cs-hero-tile {
  aspect-ratio: 1 / 1;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  display: grid;
  place-items: center;
  padding: 18px;
  transition: transform 200ms ease, background 200ms ease;
}
.cs-hero-tile:hover {
  transform: translateY(-4px);
  background: rgba(255, 255, 255, 0.1);
}
.cs-hero-tile span {
  font: 800 0.94rem/1.1 'Inter', sans-serif;
  color: #fff;
  text-align: center;
  letter-spacing: -0.01em;
}

/* ============================================================
   2. FILTER BAR
   ============================================================ */
.cs-filterbar {
  background: #fff;
  border-bottom: 1px solid var(--cs-line);
  padding: 22px 0;
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  background-color: rgba(255, 255, 255, 0.95);
}
.cs-filterbar-inner {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}
.cs-filterbar-lbl {
  font: 700 0.82rem/1 'Inter', sans-serif;
  color: var(--cs-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-right: 8px;
}
.cs-filter {
  border: 1px solid var(--cs-line);
  background: #fbfbfc;
  color: var(--cs-ink-2);
  padding: 8px 16px;
  border-radius: 8px;
  font: 600 0.88rem/1 'Inter', sans-serif;
  cursor: pointer;
  transition: all 160ms ease;
}
.cs-filter:hover {
  border-color: var(--cs-accent);
  color: var(--cs-accent);
}
.cs-filter--active {
  background: var(--cs-ink);
  color: #fff;
  border-color: var(--cs-ink);
}
.cs-filter--active:hover {
  background: var(--cs-ink);
  color: #fff;
}

/* ============================================================
   3. CASE STUDIES GRID (intro cards)
   ============================================================ */
.cs-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.cs-card {
  background: var(--cs-card);
  border: 1px solid var(--cs-line);
  border-radius: 14px;
  overflow: hidden;
  transition: transform 200ms ease, box-shadow 200ms ease, border-color 200ms ease;
  display: flex;
  flex-direction: column;
}
.cs-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 24px 48px -24px rgba(15, 23, 42, 0.2);
  border-color: rgba(255, 107, 0, 0.4);
}
.cs-card-cover {
  aspect-ratio: 16 / 10;
  background: linear-gradient(135deg, #1a1d24 0%, #2a2f3a 100%);
  position: relative;
  overflow: hidden;
  display: grid;
  place-items: center;
}
.cs-card-cover-name {
  /* Screen-reader only - identity now comes from the screenshot image */
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.cs-card-cover-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  display: block;
  transition: transform 0.5s ease;
  z-index: 1;
}
.cs-card:hover .cs-card-cover-img {
  transform: scale(1.04);
}
.cs-card-cover::before {
  /* Hidden when screenshot image is present */
  display: none;
}
.cs-card-cover[data-color="emerald"] { background: linear-gradient(135deg, #064e3b 0%, #047857 100%); }
.cs-card-cover[data-color="indigo"]  { background: linear-gradient(135deg, #1e1b4b 0%, #3730a3 100%); }
.cs-card-cover[data-color="rose"]    { background: linear-gradient(135deg, #4c0519 0%, #9f1239 100%); }
.cs-card-cover[data-color="amber"]   { background: linear-gradient(135deg, #451a03 0%, #b45309 100%); }
.cs-card-cover[data-color="cyan"]    { background: linear-gradient(135deg, #083344 0%, #0e7490 100%); }
.cs-card-cover[data-color="violet"]  { background: linear-gradient(135deg, #2e1065 0%, #6d28d9 100%); }
.cs-card-cover[data-color="slate"]   { background: linear-gradient(135deg, #0f172a 0%, #334155 100%); }
.cs-card-cover[data-color="orange"]  { background: linear-gradient(135deg, #7c2d12 0%, #ea580c 100%); }
.cs-card-cover[data-color="teal"]    { background: linear-gradient(135deg, #042f2e 0%, #0d9488 100%); }
.cs-card-cover[data-color="pink"]    { background: linear-gradient(135deg, #500724 0%, #be185d 100%); }
.cs-card-cover[data-color="lime"]    { background: linear-gradient(135deg, #1a2e05 0%, #4d7c0f 100%); }

.cs-card-body {
  padding: 22px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.cs-card-cat {
  font: 700 0.74rem/1 'Inter', sans-serif;
  color: var(--cs-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 10px;
}
.cs-card h3 {
  font: 700 1.18rem/1.25 'Inter', sans-serif;
  margin: 0 0 8px;
  color: var(--cs-ink);
  letter-spacing: -0.01em;
}
.cs-card-sub {
  font: 500 0.88rem/1.4 'Inter', sans-serif;
  color: var(--cs-muted);
  margin: 0 0 14px;
}
.cs-card-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px solid var(--cs-line);
}
.cs-card-tag {
  font: 600 0.72rem/1 'Inter', sans-serif;
  color: var(--cs-ink-2);
  background: #f1f3f6;
  padding: 5px 9px;
  border-radius: 6px;
}
.cs-card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 14px;
  font: 700 0.86rem/1 'Inter', sans-serif;
  color: var(--cs-accent);
  text-decoration: none;
  align-self: flex-start;
}
.cs-card-link svg {
  width: 14px;
  height: 14px;
  transition: transform 160ms ease;
}
.cs-card-link:hover svg {
  transform: translateX(3px);
}

/* ============================================================
   4. DEEP DIVE STUDIES (long-form per study)
   ============================================================ */
.cs-studies {
  background: #fff;
}
.cs-study {
  padding: 96px 0;
  border-bottom: 1px solid var(--cs-line);
  scroll-margin-top: 90px;
}
.cs-study:nth-child(even) {
  background: var(--cs-bg);
}
.cs-study:last-child {
  border-bottom: 0;
}
.cs-study-inner {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 56px;
  align-items: center;
}
.cs-study:nth-child(even) .cs-study-inner {
  grid-template-columns: 1.05fr 0.95fr;
}
.cs-study:nth-child(even) .cs-study-visual-wrap {
  order: 2;
}

.cs-study-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  background: rgba(255, 107, 0, 0.1);
  color: var(--cs-accent);
  border: 1px solid rgba(255, 107, 0, 0.25);
  border-radius: 999px;
  font: 700 0.74rem/1 'Inter', sans-serif;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 18px;
}
.cs-study h2 {
  font: 800 clamp(1.8rem, 3.5vw, 2.6rem)/1.1 'Inter', sans-serif;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
  color: var(--cs-ink);
}
.cs-study-tagline {
  font: 400 1.15rem/1.55 'Inter', sans-serif;
  color: var(--cs-ink-2);
  margin: 0 0 24px;
}
.cs-study-meta {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
  margin: 0 0 28px;
  padding: 18px 0;
  border-top: 1px solid var(--cs-line);
  border-bottom: 1px solid var(--cs-line);
}
.cs-study-meta-item {
  min-width: 100px;
}
.cs-study-meta-lbl {
  font: 700 0.7rem/1 'Inter', sans-serif;
  color: var(--cs-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}
.cs-study-meta-val {
  font: 700 0.95rem/1.3 'Inter', sans-serif;
  color: var(--cs-ink);
}
.cs-study h3 {
  font: 700 1.05rem/1.3 'Inter', sans-serif;
  color: var(--cs-ink);
  margin: 22px 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: 0.84rem;
}
.cs-study p {
  font: 400 1rem/1.65 'Inter', sans-serif;
  color: var(--cs-ink-2);
  margin: 0 0 14px;
}
.cs-study ul {
  margin: 0 0 18px;
  padding: 0 0 0 22px;
}
.cs-study ul li {
  font: 400 0.96rem/1.55 'Inter', sans-serif;
  color: var(--cs-ink-2);
  margin-bottom: 6px;
}
.cs-study-results {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 20px;
}
.cs-study-result {
  background: #fff;
  border: 1px solid var(--cs-line);
  border-radius: 10px;
  padding: 14px 16px;
  border-left: 3px solid var(--cs-accent);
}
.cs-study:nth-child(even) .cs-study-result {
  background: #fff;
}
.cs-study-result-num {
  font: 800 1.6rem/1 'Inter', sans-serif;
  color: var(--cs-ink);
  letter-spacing: -0.02em;
}
.cs-study-result-lbl {
  font: 500 0.78rem/1.3 'Inter', sans-serif;
  color: var(--cs-muted);
  margin-top: 4px;
}

/* Visual column wrapper - holds the screenshot panel + Visit live site button */
.cs-study-visual-wrap {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 14px;
  min-width: 0;
}

/* Visual side - large brand panel, sized to fit the whole screenshot top */
.cs-study-visual {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: linear-gradient(135deg, #1a1d24 0%, #2a2f3a 100%);
  padding: 0;
  box-shadow: 0 18px 40px rgba(15, 18, 25, 0.18), 0 2px 6px rgba(15, 18, 25, 0.08);
}
.cs-study-visual::before,
.cs-study-visual::after {
  /* Hidden when screenshot image is present */
  display: none;
}
.cs-study-visual-name {
  /* Screen-reader only - identity now comes from the screenshot image */
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.cs-study-visual-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  display: block;
  z-index: 2;
}

/* Outbound 'Visit live site' button - now lives below the panel */
.cs-study-visit {
  display: inline-flex;
  align-self: flex-start;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  font: 700 0.9rem/1 'Inter', sans-serif;
  letter-spacing: 0.02em;
  color: #fff !important;
  background: var(--cs-ink, #0f1219);
  border: 1px solid var(--cs-ink, #0f1219);
  border-radius: 8px;
  text-decoration: none;
  box-shadow: 0 4px 12px rgba(15, 18, 25, 0.16);
  transition: background-color 0.18s ease, border-color 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
}
.cs-study-visit:hover,
.cs-study-visit:focus-visible {
  background: var(--cs-accent, #ff6b00);
  border-color: var(--cs-accent, #ff6b00);
  color: #fff !important;
  transform: translateY(-1px);
  box-shadow: 0 8px 18px rgba(255, 107, 0, 0.28);
}
.cs-study-visit:focus-visible {
  outline: 2px solid var(--cs-accent, #ff6b00);
  outline-offset: 2px;
}
.cs-study-visit svg {
  flex-shrink: 0;
}
@media (max-width: 640px) {
  .cs-study-visit {
    width: 100%;
    justify-content: center;
    padding: 12px 16px;
    font-size: 0.88rem;
  }
  .cs-study-visual-wrap {
    align-items: stretch;
  }
}
.cs-study-visual-sub {
  font: 500 0.92rem/1.3 'Inter', sans-serif;
  color: rgba(255, 255, 255, 0.7);
  text-align: center;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-top: 16px;
  position: relative;
  z-index: 2;
}
.cs-study-visual--emerald { background: linear-gradient(135deg, #064e3b 0%, #047857 100%); }
.cs-study-visual--indigo  { background: linear-gradient(135deg, #1e1b4b 0%, #3730a3 100%); }
.cs-study-visual--rose    { background: linear-gradient(135deg, #4c0519 0%, #9f1239 100%); }
.cs-study-visual--amber   { background: linear-gradient(135deg, #451a03 0%, #b45309 100%); }
.cs-study-visual--cyan    { background: linear-gradient(135deg, #083344 0%, #0e7490 100%); }
.cs-study-visual--violet  { background: linear-gradient(135deg, #2e1065 0%, #6d28d9 100%); }
.cs-study-visual--slate   { background: linear-gradient(135deg, #0f172a 0%, #334155 100%); }
.cs-study-visual--orange  { background: linear-gradient(135deg, #7c2d12 0%, #ea580c 100%); }
.cs-study-visual--teal    { background: linear-gradient(135deg, #042f2e 0%, #0d9488 100%); }
.cs-study-visual--pink    { background: linear-gradient(135deg, #500724 0%, #be185d 100%); }
.cs-study-visual--lime    { background: linear-gradient(135deg, #1a2e05 0%, #4d7c0f 100%); }
.cs-study-visual--midnight{ background: linear-gradient(135deg, #020617 0%, #1e293b 100%); }
.cs-study-visual--ruby    { background: linear-gradient(135deg, #450a0a 0%, #b91c1c 100%); }
.cs-study-visual--sky     { background: linear-gradient(135deg, #0c4a6e 0%, #0284c7 100%); }
.cs-study-visual--forest  { background: linear-gradient(135deg, #052e16 0%, #166534 100%); }
.cs-study-visual--coral   { background: linear-gradient(135deg, #7f1d1d 0%, #f97316 100%); }
.cs-study-visual--royal   { background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 100%); }
.cs-study-visual--plum    { background: linear-gradient(135deg, #3b0764 0%, #7e22ce 100%); }
.cs-study-visual--rust    { background: linear-gradient(135deg, #431407 0%, #c2410c 100%); }
.cs-study-visual--sage    { background: linear-gradient(135deg, #14532d 0%, #16a34a 100%); }
.cs-study-visual--gold    { background: linear-gradient(135deg, #422006 0%, #ca8a04 100%); }
.cs-study-visual--steel   { background: linear-gradient(135deg, #1c1917 0%, #57534e 100%); }

/* ============================================================
   5. STATS BAND (full bleed)
   ============================================================ */
.cs-stats {
  background: var(--cs-dark);
  color: #fff;
  padding: 96px 0;
  position: relative;
  overflow: hidden;
}
.cs-stats::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(800px 400px at 70% 50%, rgba(255, 107, 0, 0.15), transparent 60%);
}
.cs-stats-inner {
  position: relative;
}
.cs-stats h2 {
  font: 800 clamp(2rem, 4vw, 3rem)/1.1 'Inter', sans-serif;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
  max-width: 780px;
}
.cs-stats-lede {
  font: 400 1.12rem/1.55 'Inter', sans-serif;
  color: rgba(255, 255, 255, 0.7);
  max-width: 680px;
  margin: 0 0 48px;
}
.cs-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.cs-stat {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  padding: 24px;
}
.cs-stat-num {
  font: 800 2.6rem/1 'Inter', sans-serif;
  color: #fff;
  letter-spacing: -0.03em;
  background: linear-gradient(120deg, #ff6b00, #ffb070);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.cs-stat-lbl {
  font: 500 0.92rem/1.3 'Inter', sans-serif;
  color: rgba(255, 255, 255, 0.7);
  margin-top: 8px;
}

/* ============================================================
   6. CTA (bottom)
   ============================================================ */
.cs-cta {
  background: linear-gradient(135deg, #ff6b00 0%, #ff9442 100%);
  color: #fff;
  text-align: center;
  padding: 80px 0;
}
.cs-cta h2 {
  font: 800 clamp(1.8rem, 3.5vw, 2.6rem)/1.1 'Inter', sans-serif;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
}
.cs-cta p {
  font: 400 1.1rem/1.55 'Inter', sans-serif;
  color: rgba(255, 255, 255, 0.92);
  max-width: 600px;
  margin: 0 auto 30px;
}
.cs-cta-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}
.cs-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  background: #fff;
  color: var(--cs-accent);
  border-radius: 8px;
  font: 700 1rem/1 'Inter', sans-serif;
  text-decoration: none;
  transition: transform 160ms ease, box-shadow 160ms ease;
}
.cs-cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 28px -12px rgba(0, 0, 0, 0.3);
}
.cs-cta-btn--ghost {
  background: transparent;
  border: 2px solid rgba(255, 255, 255, 0.5);
  color: #fff;
}
.cs-cta-btn--ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: #fff;
}

/* ============================================================
   Hidden when filtered
   ============================================================ */
.cs-hidden {
  display: none !important;
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1024px) {
  .cs-hero-inner {
    grid-template-columns: 1fr;
  }
  .cs-hero-tiles {
    max-width: 480px;
  }
  .cs-hero-kpis {
    grid-template-columns: repeat(2, 1fr);
  }
  .cs-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .cs-study-inner,
  .cs-study:nth-child(even) .cs-study-inner {
    grid-template-columns: 1fr;
  }
  .cs-study:nth-child(even) .cs-study-visual {
    order: 0;
  }
  .cs-stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 640px) {
  .cs-section { padding: 56px 0; }
  .cs-hero { padding: 80px 0 64px; }
  .cs-study { padding: 60px 0; }
  .cs-inner { padding: 0 20px; }
  .cs-grid { grid-template-columns: 1fr; }
  .cs-hero-tiles { grid-template-columns: repeat(3, 1fr); }
  .cs-study-results { grid-template-columns: 1fr; }
  .cs-stats-grid { grid-template-columns: 1fr; }
  .cs-filterbar { padding: 14px 0; }
  .cs-filterbar-inner { gap: 8px; }
  .cs-filter { padding: 6px 12px; font-size: 0.8rem; }
}