/* =========================================================
   Case Study – Building Leadership Campus
   Apple / macOS inspired showcase layout
   ========================================================= */

:root {
  /* Client palette (Building Leadership) */
  --bl-primary: #3B9A8D;
  --bl-primary-dark: #26413C;
  --bl-primary-deep: #1E302C;
  --bl-accent: #D9E76C;
  --bl-surface: #F3F7F6;
  --bl-surface-2: #E6EFED;
  --bl-border: #CEE3E0;

  --cs-max: 1240px;
  --cs-radius: 28px;
  --cs-radius-lg: 36px;
}

/* Offset for fixed KlarWeb header */
.cs-body { padding-top: 0; }

/* ---------- breadcrumb ---------- */
.cs-breadcrumb {
  padding: 96px 0 0;
  background: var(--clr-bg);
}

.cs-breadcrumb-inner {
  max-width: var(--cs-max);
  margin-inline: auto;
  padding-inline: var(--container-px);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.82rem;
  color: var(--clr-text-muted);
}

.cs-breadcrumb a {
  color: var(--clr-text-secondary);
  transition: color var(--t-fast);
}

.cs-breadcrumb a:hover { color: var(--clr-accent); }

.cs-breadcrumb svg {
  width: 12px;
  height: 12px;
  opacity: 0.5;
}

/* ---------- hero ---------- */
.cs-hero {
  padding: 56px 0 120px;
  background:
    radial-gradient(circle at 80% 10%, rgba(59,154,141,0.10) 0%, transparent 55%),
    radial-gradient(circle at 10% 90%, rgba(217,231,108,0.12) 0%, transparent 55%),
    var(--clr-bg);
  position: relative;
  overflow: hidden;
}

.cs-hero-inner {
  max-width: var(--cs-max);
  margin-inline: auto;
  padding-inline: var(--container-px);
  text-align: center;
}

.cs-hero .section-tag {
  background: rgba(59,154,141,0.12);
  color: var(--bl-primary-dark);
  margin-bottom: 28px;
}

.cs-hero h1 {
  font-size: clamp(2.6rem, 6vw, 4.75rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.035em;
  max-width: 920px;
  margin: 0 auto 24px;
}

.cs-hero h1 .accent {
  background: linear-gradient(135deg, var(--bl-primary) 0%, #57B8A9 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.cs-hero-sub {
  font-size: 1.15rem;
  color: var(--clr-text-secondary);
  max-width: 620px;
  margin: 0 auto 40px;
  line-height: 1.65;
}

.cs-hero-actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 72px;
}

.cs-btn-bl {
  background: var(--bl-primary-dark);
  color: #fff;
  box-shadow: 0 1px 3px rgba(38,65,60,0.3), 0 8px 24px rgba(38,65,60,0.18);
}

.cs-btn-bl:hover,
.cs-btn-bl:focus-visible {
  background: var(--bl-primary);
  transform: translateY(-1px);
}

/* ---------- macOS browser mockup ---------- */
.cs-macwin {
  max-width: 1100px;
  margin: 0 auto;
  background: #fff;
  border-radius: var(--cs-radius-lg);
  overflow: hidden;
  box-shadow:
    0 2px 4px rgba(0,0,0,0.04),
    0 24px 80px rgba(38,65,60,0.22),
    0 60px 160px rgba(38,65,60,0.14),
    0 0 0 1px rgba(0,0,0,0.04);
  border: 1px solid rgba(0,0,0,0.06);
}

.cs-macwin-chrome {
  background: linear-gradient(180deg, #F6F5F3 0%, #EDECEA 100%);
  border-bottom: 1px solid #E2E1DE;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.cs-dots {
  display: flex;
  gap: 8px;
}

.cs-dots span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  box-shadow: inset 0 0 0 0.5px rgba(0,0,0,0.1);
}

.cs-dots span:nth-child(1) { background: #FF5F57; }
.cs-dots span:nth-child(2) { background: #FEBC2E; }
.cs-dots span:nth-child(3) { background: #28C840; }

.cs-urlbar {
  flex: 1;
  max-width: 440px;
  margin: 0 auto;
  background: #fff;
  border: 1px solid #E2E1DE;
  border-radius: 999px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.8rem;
  color: #555;
}

.cs-urlbar svg {
  width: 12px;
  height: 12px;
  color: #888;
}

.cs-macwin-shot {
  margin: 0 auto;
  padding: 0;
  display: block;
}

.cs-macwin-shot img {
  display: block;
  width: 100%;
  height: auto;
}

/* BL live hero mock (legacy, unused) */
.cs-bl-hero {
  background: linear-gradient(135deg, #26413C 0%, #3A635D 100%);
  color: #fff;
  padding: 72px 56px 80px;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 40px;
  align-items: center;
  position: relative;
  min-height: 360px;
}

.cs-bl-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 85% 30%, rgba(217,231,108,0.12) 0%, transparent 55%);
  pointer-events: none;
}

.cs-bl-hero-text { position: relative; z-index: 2; }

.cs-bl-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.82rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--bl-accent);
  font-weight: 700;
  margin-bottom: 20px;
}

.cs-bl-logo-mark {
  width: 28px;
  height: 28px;
  background: var(--bl-accent);
  color: var(--bl-primary-dark);
  border-radius: 6px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 800;
}

.cs-bl-hero-text h2 {
  font-size: clamp(1.4rem, 2.4vw, 2rem);
  line-height: 1.2;
  color: #fff;
  margin-bottom: 16px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.cs-bl-hero-text p {
  color: rgba(255,255,255,0.72);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 22px;
  max-width: 400px;
}

.cs-bl-hero-btns {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.cs-bl-btn {
  padding: 10px 18px;
  border-radius: 6px;
  font-size: 0.82rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.cs-bl-btn-primary {
  background: var(--bl-accent);
  color: var(--bl-primary-dark);
}

.cs-bl-btn-ghost {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255,255,255,0.35);
}

.cs-bl-hero-visual {
  position: relative;
  z-index: 2;
  aspect-ratio: 4 / 3;
  border-radius: 18px;
  background:
    linear-gradient(135deg, rgba(217,231,108,0.20), rgba(59,154,141,0.35)),
    repeating-linear-gradient(45deg, rgba(255,255,255,0.05) 0 2px, transparent 2px 14px);
  border: 1px solid rgba(255,255,255,0.1);
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  padding: 22px;
}

.cs-bl-hero-visual::after {
  content: '';
  position: absolute;
  right: -30px;
  top: -30px;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(217,231,108,0.3), transparent 70%);
}

.cs-bl-tag-chip {
  background: rgba(255,255,255,0.16);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.22);
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 0.72rem;
  color: #fff;
  font-weight: 600;
  letter-spacing: 0.04em;
}

/* ---------- meta bar ---------- */
.cs-meta {
  background: var(--clr-bg-white);
  border-top: 1px solid var(--clr-border);
  border-bottom: 1px solid var(--clr-border);
}

.cs-meta-inner {
  max-width: var(--cs-max);
  margin-inline: auto;
  padding: 56px var(--container-px);
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 40px;
}

.cs-meta-item h4 {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--clr-text-muted);
  font-weight: 700;
  margin-bottom: 10px;
}

.cs-meta-item p {
  font-size: 0.95rem;
  color: var(--clr-text);
  font-weight: 600;
  line-height: 1.4;
  margin: 0;
}

.cs-meta-item a {
  color: var(--bl-primary);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color var(--t-fast);
}

.cs-meta-item a:hover { color: var(--bl-primary-dark); }

/* ---------- generic case-study section ---------- */
.cs-section {
  padding: 120px 0;
}

.cs-section-sm {
  padding: 80px 0;
}

.cs-bg-tinted { background: var(--bl-surface); }
.cs-bg-dark {
  background: linear-gradient(180deg, var(--bl-primary-dark) 0%, var(--bl-primary-deep) 100%);
  color: #fff;
}

.cs-container {
  max-width: var(--cs-max);
  margin-inline: auto;
  padding-inline: var(--container-px);
}

.cs-eyebrow {
  display: inline-block;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--bl-primary);
  margin-bottom: 18px;
}

.cs-bg-dark .cs-eyebrow { color: var(--bl-accent); }

.cs-headline {
  font-size: clamp(2rem, 3.8vw, 2.9rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.1;
  max-width: 760px;
  margin-bottom: 24px;
  color: var(--clr-text);
}

.cs-bg-dark .cs-headline { color: #fff; }

.cs-lead {
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--clr-text-secondary);
  max-width: 680px;
}

.cs-bg-dark .cs-lead { color: rgba(255,255,255,0.78); }

/* two-column narrative */
.cs-split {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 80px;
  align-items: center;
}

.cs-split-video {
  position: relative;
  aspect-ratio: 4 / 3;
  border-radius: var(--cs-radius);
  overflow: hidden;
  background: var(--bl-primary-dark);
  box-shadow: 0 30px 80px rgba(38,65,60,0.25);
}

.cs-split-video video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.cs-challenge-list {
  margin-top: 32px;
  display: grid;
  gap: 14px;
}

.cs-challenge-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.98rem;
  color: var(--clr-text-secondary);
  line-height: 1.55;
}

.cs-challenge-list svg {
  flex-shrink: 0;
  margin-top: 3px;
  color: var(--bl-primary);
}

/* ---------- feature grid (apple-like rows) ---------- */
.cs-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 64px;
}

.cs-feature {
  background: var(--clr-bg-white);
  border: 1px solid var(--clr-border);
  border-radius: var(--cs-radius);
  padding: 40px 32px;
  transition: transform var(--t-med) var(--ease), box-shadow var(--t-med) var(--ease);
}

.cs-feature:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 50px rgba(38,65,60,0.10);
}

.cs-feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--bl-primary) 0%, #57B8A9 100%);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  box-shadow: 0 6px 16px rgba(59,154,141,0.3);
}

.cs-feature h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.cs-feature p {
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--clr-text-secondary);
  margin: 0;
}

/* ---------- design-system strip ---------- */
.cs-ds-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 56px;
}

.cs-swatch {
  aspect-ratio: 1 / 1;
  border-radius: 22px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  font-size: 0.78rem;
  font-weight: 600;
  color: #fff;
  box-shadow: 0 12px 32px rgba(0,0,0,0.08);
  position: relative;
  overflow: hidden;
}

.cs-swatch small {
  display: block;
  opacity: 0.7;
  margin-top: 2px;
  font-weight: 500;
  font-family: 'SFMono-Regular', ui-monospace, 'SF Mono', Menlo, monospace;
}

.cs-swatch-1 { background: #3B9A8D; }
.cs-swatch-2 { background: #26413C; }
.cs-swatch-3 { background: #D9E76C; color: #26413C; }
.cs-swatch-4 { background: #F9FAFB; color: #26413C; border: 1px solid var(--clr-border); }

.cs-swatch-label { font-size: 0.82rem; }

/* typography card */
.cs-typo {
  background: var(--clr-bg-white);
  border-radius: var(--cs-radius);
  border: 1px solid var(--clr-border);
  padding: 48px;
  margin-top: 36px;
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  align-items: center;
}

.cs-typo-label {
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--clr-text-muted);
  font-weight: 700;
  margin-bottom: 8px;
}

.cs-typo-name {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 6px;
}

.cs-typo-desc {
  font-size: 0.9rem;
  color: var(--clr-text-secondary);
  max-width: 280px;
}

.cs-typo-preview {
  font-family: 'Inter', sans-serif;
  display: grid;
  gap: 14px;
}

.cs-typo-preview .wt-800 { font-size: 2.1rem; font-weight: 800; letter-spacing: -0.025em; line-height: 1.1; }
.cs-typo-preview .wt-600 { font-size: 1.1rem; font-weight: 600; color: var(--bl-primary); }
.cs-typo-preview .wt-400 { font-size: 0.95rem; font-weight: 400; color: var(--clr-text-secondary); line-height: 1.6; }

/* ---------- screens gallery ---------- */
.cs-screens {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 24px;
  margin-top: 64px;
}

.cs-screen {
  background: var(--clr-bg-white);
  border-radius: var(--cs-radius);
  overflow: hidden;
  box-shadow: 0 18px 50px rgba(38,65,60,0.12);
  border: 1px solid var(--clr-border);
  aspect-ratio: 16 / 10;
  position: relative;
  display: flex;
  flex-direction: column;
}

.cs-screen-chrome {
  padding: 12px 16px;
  background: #FAFAF9;
  border-bottom: 1px solid var(--clr-border);
  display: flex;
  gap: 6px;
}

.cs-screen-chrome span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.cs-screen-chrome span:nth-child(1) { background: #FF5F57; }
.cs-screen-chrome span:nth-child(2) { background: #FEBC2E; }
.cs-screen-chrome span:nth-child(3) { background: #28C840; }

.cs-screen-body {
  flex: 1;
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  background: linear-gradient(135deg, #26413C 0%, #3A635D 100%);
  color: #fff;
  position: relative;
  overflow: hidden;
}

.cs-screen-body::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 80% 20%, rgba(217,231,108,0.14), transparent 60%);
}

.cs-screen-body h4 {
  font-size: 1.2rem;
  color: #fff;
  font-weight: 700;
  position: relative;
}

.cs-screen-body p {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.7);
  line-height: 1.55;
  margin: 0;
  position: relative;
  max-width: 80%;
}

.cs-screen-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: auto;
  position: relative;
}

.cs-screen-cards div {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 10px;
  height: 58px;
  backdrop-filter: blur(6px);
}

.cs-screen-alt .cs-screen-body {
  background: var(--bl-surface);
  color: var(--bl-primary-dark);
}

.cs-screen-alt .cs-screen-body::before {
  background: radial-gradient(circle at 20% 80%, rgba(59,154,141,0.14), transparent 60%);
}

.cs-screen-alt .cs-screen-body h4 { color: var(--bl-primary-dark); }
.cs-screen-alt .cs-screen-body p { color: var(--clr-text-secondary); }

.cs-screen-alt .cs-module-list {
  margin-top: auto;
  display: grid;
  gap: 8px;
  position: relative;
}

.cs-module-list-item {
  background: #fff;
  border: 1px solid var(--bl-border);
  border-radius: 10px;
  padding: 10px 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--bl-primary-dark);
}

.cs-module-list-item .pill {
  background: var(--bl-accent);
  color: var(--bl-primary-dark);
  padding: 3px 8px;
  border-radius: 999px;
  font-size: 0.64rem;
}

/* ---------- quote ---------- */
.cs-quote {
  max-width: 880px;
  margin: 0 auto;
  text-align: center;
}

.cs-quote-mark {
  font-size: 5rem;
  line-height: 0.6;
  color: var(--bl-accent);
  font-weight: 800;
  margin-bottom: 20px;
  display: block;
}

.cs-quote blockquote {
  font-size: clamp(1.4rem, 2.5vw, 1.85rem);
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: -0.015em;
  color: #fff;
  margin-bottom: 28px;
}

.cs-quote cite {
  font-style: normal;
  font-size: 0.92rem;
  color: rgba(255,255,255,0.7);
  font-weight: 500;
}

.cs-quote cite strong {
  display: block;
  color: #fff;
  font-weight: 700;
  margin-bottom: 2px;
}

/* ---------- outcomes / stats ---------- */
.cs-outcomes {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin-top: 64px;
  border-radius: var(--cs-radius);
  overflow: hidden;
  border: 1px solid var(--clr-border);
  background: var(--clr-border);
}

.cs-outcome {
  background: var(--clr-bg-white);
  padding: 44px 36px;
  text-align: center;
}

.cs-outcome-num {
  font-size: clamp(2.4rem, 4vw, 3.25rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--bl-primary) 0%, var(--bl-primary-dark) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  margin-bottom: 10px;
}

.cs-outcome-label {
  font-size: 0.9rem;
  color: var(--clr-text-secondary);
  font-weight: 500;
  line-height: 1.5;
}

/* ---------- next CTA ---------- */
.cs-next {
  padding: 120px 0;
  background: var(--clr-bg);
  text-align: center;
}

.cs-next h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  margin-bottom: 20px;
}

.cs-next p {
  font-size: 1.1rem;
  color: var(--clr-text-secondary);
  max-width: 560px;
  margin: 0 auto 36px;
}

.cs-next-actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

/* ---------- responsive ---------- */
@media (max-width: 1024px) {
  .cs-section { padding: 88px 0; }
  .cs-split { grid-template-columns: 1fr; gap: 48px; }
  .cs-features { grid-template-columns: repeat(2, 1fr); }
  .cs-meta-inner { grid-template-columns: repeat(2, 1fr); gap: 32px; padding: 40px var(--container-px); }
  .cs-ds-grid { grid-template-columns: repeat(2, 1fr); }
  .cs-screens { grid-template-columns: 1fr; }
  .cs-typo { grid-template-columns: 1fr; padding: 36px; gap: 28px; }
  .cs-outcomes { grid-template-columns: 1fr; }
  .cs-bl-hero { grid-template-columns: 1fr; padding: 40px 32px; }
  .cs-bl-hero-visual { display: none; }
}

@media (max-width: 680px) {
  .cs-hero { padding: 40px 0 80px; }
  .cs-hero-actions { margin-bottom: 48px; }
  .cs-section { padding: 64px 0; }
  .cs-features { grid-template-columns: 1fr; }
  .cs-meta-inner { grid-template-columns: 1fr; }
  .cs-macwin { border-radius: 18px; }
  .cs-macwin-chrome { padding: 10px 14px; }
  .cs-urlbar { height: 24px; font-size: 0.7rem; }
}