.cs-main {
  max-width: 824px;
  margin: 0 auto;
  padding: 90px 0 60px;
}

.cs-hero {
  display: flex;
  gap: 60px;
  justify-content: space-between;
  margin-bottom: 60px;
}
.cs-hero-left { flex: 1; min-width: 280px; }
.cs-hero-right { flex: 1; min-width: 280px; margin-top: 31px; }
.cs-hero-subtitle {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-dark);
  margin: 0 0 8px;
}
.cs-hero-title {
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 8px;
}
.cs-hero-tagline { font-size: 14px; margin: 0; }
.cs-section-title { font-size: 18px; font-weight: 700; margin: 0 0 16px; }
.cs-hero-mission { font-size: 12px; line-height: 1.6; margin: 0; }

.cs-img-section { margin: 0 0 60px; }
.cs-img {
  background: #edeae8;
  border: 1px solid #000;
  border-radius: 8px;
  aspect-ratio: 16 / 10;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.cs-img img { width: 100%; height: 100%; object-fit: contain; display: block; }
.cs-stacked .cs-img { aspect-ratio: auto; }
.cs-stacked .cs-img img { height: auto; }
.cs-img-label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-dark);
  text-align: center;
  padding: 0 16px;
}
.cs-hero-images { display: block; }
.cs-hero-images .cs-img { width: 100%; aspect-ratio: 824/473; }
.cs-img--noborder { border: none; background: transparent; border-radius: 0; }

.cs-pair { display: flex; gap: 16px; }
.cs-pair .cs-img { flex: 1; aspect-ratio: 407.5/289; }
.cs-pair--fixed { align-items: flex-start; }
.cs-pair--fixed .cs-img { flex: none; width: 404px; }
.cs-img--full { aspect-ratio: 825/422; }
.cs-img--tall { aspect-ratio: 281/556; max-width: 281px; margin: 0 auto; }

.cs-overlay-pair { position: relative; }
.cs-overlay-pair .cs-img--wide { width: 100%; aspect-ratio: 670/306; }
.cs-overlay-pair .cs-img--overlay {
  position: absolute;
  left: 55.3%;
  top: 34.3%;
  width: 44.7%;
  aspect-ratio: 366/262;
  box-shadow: 6px 6px 16px rgba(0,0,0,0.15);
}

.cs-centered-block {
  text-align: center;
  max-width: 629px;
  margin: 0 auto 60px;
}
.cs-centered-block.cs-narrow { max-width: 560px; }
.cs-h2 { font-size: 18px; font-weight: 700; margin: 0 0 16px; }
.cs-h3 { font-size: 16px; font-weight: 700; margin: 0 0 12px; }
.cs-body { font-size: 12px; line-height: 1.6; margin: 0 0 12px; }
.cs-body strong { font-weight: 700; }

.cs-info-table {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  border: 1px solid #000;
  border-radius: 8px;
  overflow: hidden;
  margin: 0 0 60px;
}
.cs-info-table--3col { grid-template-columns: repeat(3, 1fr); }
.cs-info-cell {
  border-right: 1px solid #000;
  background: #fff;
  padding: 16px;
  text-align: center;
}
.cs-info-cell:last-child { border-right: none; }
.cs-info-label {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 12px;
  border-bottom: 1px solid #000;
  margin: -16px -16px 12px;
  padding: 12px;
}
.cs-info-value {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.5;
  margin: 0;
}

.cs-challenge-solution {
  display: flex;
  gap: 16px;
  margin: 0 0 60px;
}
.cs-cs-col { flex: 1; }
.cs-cs-title { font-size: 16px; font-weight: 700; margin: 0 0 16px; }
.cs-cs-item { font-size: 12px; line-height: 1.6; margin: 0 0 16px; }
.cs-cs-item:last-child { margin-bottom: 0; }
.cs-cs-item strong { display: block; font-size: 14px; margin-bottom: 0; line-height: 1.4; }

.cs-approach-title { text-align: center; font-size: 18px; font-weight: 700; margin: 60px 0; }

.cs-stepper {
  display: flex;
  align-items: center;
  gap: 0;
  max-width: 812px;
  margin: 0 auto 60px;
}
.cs-step {
  flex: 1;
  background: #fff;
  border: 1px solid #000;
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  text-align: center;
  padding: 16px 8px;
}
.cs-step-line { width: 30px; height: 1px; background: #000; flex-shrink: 0; }

.cs-step-block { max-width: 824px; margin: 0 auto 40px; display: flex; justify-content: center; }
.cs-step-text { width: 500px; max-width: 100%; text-align: center; }
.cs-step-heading { font-size: 18px; font-weight: 700; margin: 0 0 16px; }

.cs-stacked { display: flex; flex-direction: column; gap: 4px; max-width: 819px; margin: 0 auto 60px; }
.cs-stacked .cs-img { margin-top: 12px; }
.cs-caption {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.5;
  margin: 0 0 4px;
  color: rgba(0, 0, 0, 0.5);
}
.cs-list {
  font-size: 12px;
  line-height: 1.6;
  margin: 8px 0 0;
  padding-left: 20px;
}

.cs-improvements { max-width: 394px; margin: 0 auto 60px; display: flex; flex-direction: column; gap: 16px; }
.cs-improvements-title { font-size: 18px; font-weight: 700; text-align: center; margin: 0 0 8px; }
.cs-improvement-card { background: #fff; border: 1px solid #000; border-radius: 8px; padding: 16px; }
.cs-improvement-card .cs-caption { margin: 0; }

.cs-grid8 {
  display: grid;
  grid-template-columns: repeat(4, 192px);
  justify-content: center;
  gap: 16px;
  max-width: 824px;
  margin: 0 auto 60px;
}
.cs-grid8 .cs-img { aspect-ratio: 192/380; }

.cs-results { text-align: center; max-width: 601px; margin: 0 auto 60px; }

.cs-highlights { display: flex; align-items: center; gap: 0; max-width: 812px; margin: 0 auto 60px; }
.cs-highlight-card {
  flex: 1;
  background: #fff;
  border: 1px solid #000;
  border-radius: 8px;
  font-size: 12px;
  font-weight: 700;
  text-align: center;
  padding: 16px;
}
.cs-highlight-line { width: 40px; height: 1px; background: #000; flex-shrink: 0; }

.cs-stat-row { display: flex; gap: 16px; max-width: 824px; margin: 0 auto 16px; }
.cs-stat-row--last { margin-bottom: 60px; }
.cs-stat-card { flex: 1; background: #fff; border: 1px solid #000; border-radius: 8px; padding: 20px 16px; text-align: center; }
.cs-stat-number { font-size: 22px; font-weight: 700; margin: 0 0 6px; }
.cs-stat-label { font-family: var(--font-mono); font-size: 11px; line-height: 1.4; margin: 0; }

.cs-reflection { display: flex; flex-direction: column; gap: 16px; }

/* Persona card */
.cs-persona { display: flex; gap: 24px; background: #fff; border: 1px solid #000; border-radius: 8px; padding: 24px; margin: 0 0 60px; }
.cs-persona-side { flex-shrink: 0; width: 140px; text-align: center; }
.cs-persona-photo { width: 120px; height: 120px; border-radius: 50%; overflow: hidden; border: 1px solid #000; margin: 0 auto; }
.cs-persona-photo img { width: 100%; height: 100%; object-fit: cover; display: block; }
.cs-persona-name { font-size: 15px; font-weight: 700; margin: 12px 0 8px; }
.cs-persona-meta { font-family: var(--font-mono); font-size: 11px; line-height: 1.7; text-align: left; margin: 0; }
.cs-persona-body { flex: 1; display: grid; grid-template-columns: 1fr 1fr; gap: 20px 24px; }
.cs-persona-body h4 { font-size: 13px; font-weight: 700; margin: 0 0 6px; }
.cs-persona-body ul { font-size: 12px; line-height: 1.6; margin: 0; padding-left: 16px; }
.cs-persona-body ul li { margin-bottom: 2px; }

/* Journey map table */
.cs-journey-wrap { overflow-x: auto; margin: 0 0 60px; }
.cs-journey-table { width: 100%; min-width: 700px; border-collapse: collapse; font-size: 11px; border: 1px solid #000; border-radius: 8px; overflow: hidden; }
.cs-journey-table th { background: #1e1e1e; color: #fff; font-family: var(--font-mono); font-weight: 700; padding: 10px 12px; text-align: left; }
.cs-journey-table td { border-top: 1px solid #000; border-right: 1px solid #eee; padding: 10px 12px; vertical-align: top; font-family: var(--font-mono); line-height: 1.5; background: #fff; }
.cs-journey-table td:first-child { font-weight: 700; }
.cs-journey-table .cs-journey-label { background: rgba(0,0,0,0.1); }

/* Task result card */
.cs-task-row { display: flex; gap: 16px; margin: 0 0 40px; }
.cs-task-card { flex: 1; background: #fff; border: 1px solid #000; border-radius: 8px; padding: 16px; }
.cs-task-title { font-size: 13px; font-weight: 700; margin: 0 0 10px; }
.cs-task-stat { display: flex; justify-content: space-between; font-family: var(--font-mono); font-size: 11px; margin-bottom: 4px; }
.cs-task-stat strong { font-weight: 700; }
.cs-task-divider { border: none; border-top: 1px solid #ddd; margin: 10px 0; }
.cs-task-pos, .cs-task-neg { font-size: 11px; line-height: 1.5; margin: 0 0 4px; }
.cs-task-pos strong, .cs-task-neg strong { font-weight: 700; }

/* Research note card (before/after) */
.cs-note-row { display: flex; gap: 16px; margin: 0 0 60px; }
.cs-note-card { flex: 1; background: #fff; border: 1px solid #000; border-radius: 8px; padding: 16px; }
.cs-note-badge { display: inline-block; font-family: var(--font-mono); font-size: 10px; font-weight: 700; padding: 3px 10px; border-radius: 4px; margin-bottom: 10px; }
.cs-note-badge--success { background: #d7f2df; color: #1a7a3c; }
.cs-note-badge--partial { background: #fdf0cc; color: #8a6300; }
.cs-note-badge--fail { background: #fbdcd9; color: #b3261e; }
.cs-note-badge--focus { background: #1e1e1e; color: #fff; font-size: 9px; vertical-align: middle; margin: 0 0 0 8px; padding: 3px 8px; }
.cs-cs-title--sub { font-size: 13px; text-transform: uppercase; letter-spacing: 0.02em; }
.cs-note-stat { font-family: var(--font-mono); font-size: 11px; margin: 0 0 10px; }
.cs-note-qa { font-size: 11px; line-height: 1.6; margin: 0; }

.cs-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  justify-content: center;
  width: 100%;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-dark);
  text-decoration: none;
  margin: 300px 0 20px;
}
.cs-cta .arrow { display: inline-block; transition: transform 0.25s ease; }
.cs-cta:hover .arrow { transform: translateX(4px); }

@media (max-width: 700px) {
  .cs-main { padding: 90px 20px 60px; }
  .cs-hero { flex-direction: column; gap: 24px; }
  .cs-challenge-solution, .cs-pair, .cs-step-block { flex-direction: column; }
  .cs-pair--fixed .cs-img { width: 100%; }
  .cs-step-text--right { margin-left: 0; }
  .cs-info-table, .cs-info-table--3col { grid-template-columns: 1fr; }
  .cs-info-cell { border-right: none; border-bottom: 1px solid #000; }
  .cs-info-cell:last-child { border-bottom: none; }
  .cs-persona { flex-direction: column; align-items: center; text-align: center; }
  .cs-persona-body { grid-template-columns: 1fr; text-align: left; }
  .cs-persona-meta { text-align: center; }
  .cs-task-row, .cs-note-row { flex-direction: column; }
  .cs-stat-row { flex-direction: column; }
  .cs-grid8 { grid-template-columns: repeat(4, 1fr); gap: 8px; }
  .cs-stepper { flex-direction: column; align-items: stretch; gap: 0; }
  .cs-step { width: 100%; }
  .cs-step-line {
    display: block;
    width: 1px;
    height: 16px;
    margin: 6px auto;
    background: #000;
    align-self: center;
    flex-shrink: 0;
  }
}