/* ==========================================================================
   RadioTech Studio — Case Studies Stylesheet
   ========================================================================== */

/* --------------------------------------------------------------------------
   Case Studies Listing Page
   -------------------------------------------------------------------------- */
.cs-hero {
  padding: calc(var(--header-h) + 4rem) 0 3rem;
  background: var(--clr-bg);
  position: relative;
  overflow: hidden;
  text-align: center;
}
.cs-hero::before {
  content: '';
  position: absolute;
  top: -100px; left: 50%;
  transform: translateX(-50%);
  width: 800px; height: 400px;
  background: radial-gradient(ellipse, rgba(0,212,255,0.08) 0%, transparent 70%);
  pointer-events: none;
}
.cs-hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--clr-blue);
  background: rgba(0,212,255,0.08);
  border: 1px solid rgba(0,212,255,0.2);
  padding: 0.35em 1em;
  border-radius: var(--radius-full);
  margin-bottom: 1.5rem;
}
.cs-hero-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 900;
  color: #fff;
  line-height: 1.1;
  margin-bottom: 1.25rem;
}
.cs-hero-desc {
  font-size: var(--fs-md);
  color: var(--clr-text-muted);
  max-width: 580px;
  margin: 0 auto 2.5rem;
  line-height: 1.8;
}
.cs-stats-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 3rem;
  flex-wrap: wrap;
}
.cs-stat {
  text-align: center;
}
.cs-stat-num {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  background: var(--grad-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.cs-stat-label {
  font-size: var(--fs-xs);
  color: var(--clr-text-dim);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* Filter bar */
.cs-filters {
  padding: 2rem 0;
  border-bottom: 1px solid var(--clr-border);
}
.cs-filter-inner {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.cs-filter-btn {
  font-size: var(--fs-xs);
  font-weight: 600;
  padding: 0.4em 1.1em;
  border-radius: var(--radius-full);
  border: 1px solid var(--clr-border);
  color: var(--clr-text-muted);
  background: transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  letter-spacing: 0.04em;
}
.cs-filter-btn:hover,
.cs-filter-btn.active {
  border-color: var(--clr-blue);
  color: var(--clr-blue);
  background: rgba(0,212,255,0.06);
}

/* Case study cards grid */
.cs-grid-section { padding: 4rem 0 6rem; }
.cs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 2rem;
}

/* Individual card */
.cs-card {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all 0.35s ease;
  display: flex;
  flex-direction: column;
  position: relative;
}
.cs-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-xl);
  background: var(--grad-glow);
  opacity: 0;
  transition: opacity 0.35s ease;
  pointer-events: none;
}
.cs-card:hover {
  border-color: rgba(0,212,255,0.35);
  transform: translateY(-6px);
  box-shadow: 0 20px 60px rgba(0,0,0,0.4), 0 0 40px rgba(0,212,255,0.08);
}
.cs-card:hover::before { opacity: 1; }

.cs-card-visual {
  position: relative;
  height: 230px;
  overflow: hidden;
  background: linear-gradient(135deg, #080e1e 0%, #0d1530 100%);
}
.cs-card-visual > div[style*="z-index:1"] {
  padding-top: 3rem !important;
}
.cs-card-visual-inner {
  width: 100%; height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.cs-card-mockup {
  width: 85%;
  max-width: 280px;
  background: rgba(10,18,38,0.9);
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: var(--radius-lg);
  padding: 1rem;
  position: relative;
  z-index: 1;
}
.cs-card-mockup-header {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 0.75rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid rgba(0,212,255,0.1);
}
.cs-mock-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
}
.cs-mock-dot.red { background: #ff5f57; }
.cs-mock-dot.yellow { background: #febc2e; }
.cs-mock-dot.green { background: #28c840; }
.cs-mock-title {
  font-size: 0.65rem;
  color: var(--clr-text-dim);
  margin-left: 0.25rem;
}
.cs-mock-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.4rem;
}
.cs-mock-label {
  font-size: 0.6rem;
  color: var(--clr-text-dim);
  width: 50px;
  flex-shrink: 0;
}
.cs-mock-bar {
  height: 4px;
  border-radius: 2px;
  flex: 1;
}
.cs-mock-bar.blue { background: linear-gradient(90deg, #00d4ff, #7c3aed); }
.cs-mock-bar.green { background: linear-gradient(90deg, #10b981, #00d4ff); }
.cs-mock-bar.purple { background: linear-gradient(90deg, #7c3aed, #a855f7); }
.cs-mock-val {
  font-size: 0.6rem;
  color: var(--clr-blue);
  font-weight: 700;
  width: 28px;
  text-align: right;
}
.cs-mock-status {
  font-size: 0.55rem;
  margin-top: 0.5rem;
  padding: 0.2em 0.6em;
  border-radius: var(--radius-full);
  display: inline-block;
}
.cs-mock-status.live {
  background: rgba(16,185,129,0.15);
  color: #10b981;
  border: 1px solid rgba(16,185,129,0.3);
}

.cs-card-visual-glow {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(0,212,255,0.06) 0%, transparent 70%);
}
.cs-card-cat-badge {
  position: absolute;
  top: 0.75rem; left: 0.75rem;
  max-width: calc(100% - 1.5rem);
  font-size: 0.58rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  line-height: 1;
  padding: 0.42em 0.75em;
  border-radius: var(--radius-full);
  background: rgba(0,212,255,0.12);
  border: 1px solid rgba(0,212,255,0.25);
  color: var(--clr-blue);
  z-index: 2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.cs-card-body {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.cs-card-title {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.75rem;
  line-height: 1.3;
}
.cs-card-summary {
  font-size: var(--fs-sm);
  color: var(--clr-text-muted);
  line-height: 1.7;
  margin-bottom: 1.25rem;
  flex: 1;
}
.cs-card-metrics {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}
.cs-metric {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}
.cs-metric-val {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  font-weight: 800;
  background: var(--grad-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.cs-metric-label {
  font-size: 0.65rem;
  color: var(--clr-text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.cs-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.25rem;
}
.cs-tag {
  font-size: 0.65rem;
  font-weight: 600;
  padding: 0.25em 0.7em;
  border-radius: var(--radius-full);
  background: rgba(124,58,237,0.1);
  border: 1px solid rgba(124,58,237,0.2);
  color: #a855f7;
}
.cs-card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--clr-blue);
  text-decoration: none;
  transition: gap var(--transition-fast);
}
.cs-card-link:hover { gap: 0.65rem; }
.cs-card-link svg { width: 16px; height: 16px; }

/* --------------------------------------------------------------------------
   Individual Case Study Page
   -------------------------------------------------------------------------- */
.csp-hero {
  padding: calc(var(--header-h) + 3rem) 0 3rem;
  background: var(--clr-bg);
  position: relative;
  overflow: hidden;
}
.csp-hero::before {
  content: '';
  position: absolute;
  top: -120px; right: -100px;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(124,58,237,0.12) 0%, transparent 70%);
  pointer-events: none;
}
.csp-hero::after {
  content: '';
  position: absolute;
  bottom: -80px; left: -80px;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(0,212,255,0.08) 0%, transparent 70%);
  pointer-events: none;
}
.csp-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.4em;
  font-size: var(--fs-sm);
  color: var(--clr-text-dim);
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}
.csp-breadcrumb a { color: var(--clr-text-muted); text-decoration: none; transition: color var(--transition-fast); }
.csp-breadcrumb a:hover { color: var(--clr-blue); }
.csp-breadcrumb-sep { color: var(--clr-text-dim); }

.csp-hero-inner {
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: 3rem;
  align-items: center;
}
.csp-cat-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}
.csp-cat {
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-blue);
  background: rgba(0,212,255,0.08);
  border: 1px solid rgba(0,212,255,0.2);
  padding: 0.3em 0.9em;
  border-radius: var(--radius-full);
}
.csp-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 900;
  color: #fff;
  line-height: 1.15;
  margin-bottom: 1.25rem;
}
.csp-summary {
  font-size: var(--fs-md);
  color: var(--clr-text-muted);
  line-height: 1.8;
  margin-bottom: 2rem;
}
.csp-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-bottom: 2rem;
  padding: 1.25rem;
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
}
.csp-meta-item { display: flex; flex-direction: column; gap: 0.2rem; }
.csp-meta-label { font-size: 0.65rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--clr-text-dim); }
.csp-meta-val { font-size: var(--fs-sm); font-weight: 600; color: var(--clr-text); }

.csp-hero-visual {
  position: relative;
}
.csp-hero-card {
  background: rgba(8,14,30,0.95);
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5), 0 0 40px rgba(0,212,255,0.06);
}
.csp-hero-card-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid rgba(0,212,255,0.1);
}
.csp-hero-card-dot { width: 10px; height: 10px; border-radius: 50%; }
.csp-status-live {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: var(--fs-xs);
  font-weight: 700;
  color: #10b981;
  margin-left: auto;
}
.csp-status-live::before {
  content: '';
  width: 7px; height: 7px;
  background: #10b981;
  border-radius: 50%;
  animation: pulse-dot 2s infinite;
}

/* Section layout */
.csp-section {
  padding: 5rem 0;
  position: relative;
}
.csp-section + .csp-section {
  border-top: 1px solid var(--clr-border);
}
.csp-section-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}
.csp-section-tag.blue { color: var(--clr-blue); }
.csp-section-tag.purple { color: #a855f7; }
.csp-section-tag.green { color: #10b981; }
.csp-section-tag svg { width: 14px; height: 14px; }

.csp-section-title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 1rem;
}
.csp-section-desc {
  font-size: var(--fs-md);
  color: var(--clr-text-muted);
  line-height: 1.8;
  max-width: 680px;
  margin-bottom: 2.5rem;
}

/* Challenge cards */
.csp-challenge-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
}
.csp-challenge-card {
  background: rgba(255,59,59,0.04);
  border: 1px solid rgba(255,59,59,0.15);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: all var(--transition-base);
}
.csp-challenge-card:hover {
  border-color: rgba(255,59,59,0.3);
  background: rgba(255,59,59,0.07);
}
.csp-challenge-icon {
  width: 42px; height: 42px;
  background: rgba(255,59,59,0.1);
  border: 1px solid rgba(255,59,59,0.2);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  color: #ff6b6b;
}
.csp-challenge-icon svg { width: 20px; height: 20px; }
.csp-challenge-title {
  font-size: var(--fs-base);
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.5rem;
}
.csp-challenge-desc {
  font-size: var(--fs-sm);
  color: var(--clr-text-muted);
  line-height: 1.7;
}

/* Solution steps */
.csp-solution-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}
.csp-solution-steps { display: flex; flex-direction: column; gap: 1.25rem; }
.csp-step {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
}
.csp-step-num {
  width: 36px; height: 36px;
  background: var(--grad-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--fs-xs);
  font-weight: 800;
  color: #fff;
  flex-shrink: 0;
}
.csp-step-body {}
.csp-step-title {
  font-size: var(--fs-base);
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.35rem;
}
.csp-step-desc {
  font-size: var(--fs-sm);
  color: var(--clr-text-muted);
  line-height: 1.7;
}

/* Solution visual panel */
.csp-solution-panel {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  position: sticky;
  top: calc(var(--header-h) + 1rem);
}
.csp-panel-title {
  font-size: var(--fs-sm);
  font-weight: 700;
  color: var(--clr-blue);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--clr-border);
}
.csp-panel-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid rgba(0,212,255,0.05);
}
.csp-panel-item:last-child { border-bottom: none; }
.csp-panel-check {
  width: 20px; height: 20px;
  background: rgba(16,185,129,0.1);
  border: 1px solid rgba(16,185,129,0.25);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: #10b981;
}
.csp-panel-check svg { width: 11px; height: 11px; }
.csp-panel-text { font-size: var(--fs-sm); color: var(--clr-text-muted); }

/* Results stats */
.csp-results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}
.csp-result-card {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  text-align: center;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}
.csp-result-card::before {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px;
  background: var(--grad-primary);
}
.csp-result-card:hover {
  border-color: rgba(0,212,255,0.3);
  transform: translateY(-3px);
}
.csp-result-icon {
  width: 40px; height: 40px;
  background: rgba(0,212,255,0.08);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 0.75rem;
  color: var(--clr-blue);
}
.csp-result-icon svg { width: 20px; height: 20px; }
.csp-result-num {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 900;
  background: var(--grad-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 0.35rem;
}
.csp-result-label {
  font-size: var(--fs-xs);
  color: var(--clr-text-dim);
  text-transform: uppercase;
  letter-spacing: 0.07em;
}

/* Tech stack */
.csp-stack-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.csp-stack-chip {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5em 1.1em;
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-full);
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--clr-text);
  transition: all var(--transition-fast);
}
.csp-stack-chip:hover {
  border-color: var(--clr-blue);
  color: var(--clr-blue);
  background: rgba(0,212,255,0.05);
}
.csp-stack-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--grad-primary);
  flex-shrink: 0;
}

/* CTA section */
.csp-cta {
  background: linear-gradient(135deg, rgba(0,212,255,0.06) 0%, rgba(124,58,237,0.06) 100%);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  padding: 3rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.csp-cta::before {
  content: '';
  position: absolute;
  top: -60px; left: 50%;
  transform: translateX(-50%);
  width: 400px; height: 200px;
  background: radial-gradient(ellipse, rgba(0,212,255,0.1) 0%, transparent 70%);
  pointer-events: none;
}
.csp-cta-title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  color: #fff;
  margin-bottom: 0.75rem;
}
.csp-cta-desc {
  font-size: var(--fs-md);
  color: var(--clr-text-muted);
  margin-bottom: 2rem;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}
.csp-cta-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Nav between case studies */
.csp-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-top: 2rem;
}
.csp-nav-item {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
  text-decoration: none;
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.csp-nav-item:hover {
  border-color: rgba(0,212,255,0.3);
  transform: translateY(-2px);
}
.csp-nav-dir {
  font-size: var(--fs-xs);
  color: var(--clr-text-dim);
  text-transform: uppercase;
  letter-spacing: 0.07em;
}
.csp-nav-title {
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--clr-blue);
}
.csp-nav-item.next { text-align: right; }

/* --------------------------------------------------------------------------
   Homepage Featured Section
   -------------------------------------------------------------------------- */
.featured-cs { padding: var(--space-2xl) 0; }
.featured-cs-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
}
.featured-cs-card {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all 0.35s ease;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  position: relative;
}
.featured-cs-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-xl);
  border: 1px solid transparent;
  background: var(--grad-primary) border-box;
  -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: destination-out;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.35s ease;
}
.featured-cs-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 60px rgba(0,0,0,0.4), 0 0 40px rgba(0,212,255,0.08);
}
.featured-cs-card:hover::after { opacity: 1; }

.featured-cs-top {
  height: 170px;
  background: linear-gradient(135deg, #070d1f 0%, #0d1530 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.featured-cs-icon {
  width: 70px; height: 70px;
  background: var(--grad-glow);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 1;
}
.featured-cs-icon svg { width: 32px; height: 32px; color: var(--clr-blue); }
.featured-cs-glow {
  position: absolute;
  width: 200px; height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0,212,255,0.1) 0%, transparent 70%);
}

.featured-cs-body { padding: 1.5rem; flex: 1; display: flex; flex-direction: column; }
.featured-cs-cat {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-blue);
  margin-bottom: 0.5rem;
}
.featured-cs-title {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.65rem;
  line-height: 1.3;
}
.featured-cs-desc {
  font-size: var(--fs-sm);
  color: var(--clr-text-muted);
  line-height: 1.7;
  margin-bottom: 1.25rem;
  flex: 1;
}
.featured-cs-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 1.25rem;
}
.featured-cs-tag {
  font-size: 0.6rem;
  font-weight: 600;
  padding: 0.2em 0.65em;
  border-radius: var(--radius-full);
  background: rgba(124,58,237,0.1);
  border: 1px solid rgba(124,58,237,0.2);
  color: #a855f7;
}
.featured-cs-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--clr-blue);
  transition: gap var(--transition-fast);
}
.featured-cs-link svg { width: 15px; height: 15px; }
.featured-cs-card:hover .featured-cs-link { gap: 0.65rem; }

.cs-view-all {
  text-align: center;
  margin-top: 2.5rem;
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 1100px) {
  .csp-hero-inner { grid-template-columns: 1fr; }
  .csp-hero-visual { display: none; }
  .csp-solution-layout { grid-template-columns: 1fr; }
  .csp-solution-panel { position: static; }
  .featured-cs-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .cs-grid { grid-template-columns: 1fr; }
  .csp-results-grid { grid-template-columns: repeat(2, 1fr); }
  .csp-challenge-grid { grid-template-columns: 1fr; }
  .featured-cs-grid { grid-template-columns: 1fr; }
  .csp-nav { grid-template-columns: 1fr; }
  .csp-cta { padding: 2rem 1.25rem; }
  .cs-stats-row { gap: 1.5rem; }
}

@media (max-width: 480px) {
  .csp-results-grid { grid-template-columns: 1fr; }
  .csp-meta-row { flex-direction: column; gap: 1rem; }
}