/* ── MENU design-system palette ── */
:root {
  --menu-ink: #1A1A1A;
  --menu-amber: #d5ad78;
  --menu-white: #FFFFFF;
  --menu-offwhite: #FAFAFA;
  --menu-stone: #9B9B9B;
  --menu-mist: #F2F2F2;
  --menu-brand-color: #d5ad78;
  --menushop-brand-color: #5cd646;
}

/* ── Case study base classes ── */
.cs-label {
  font-family: Lato, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif, "PT Serif", Times, "Times New Roman", Georgia, serif;
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--menu-stone);
  display: block;
  margin-bottom: 0.5rem;
}

.cs-divider {
  border: none;
  border-top: 1px solid var(--menu-mist);
  margin: 0;
}

.cs-stat-block {
  padding-left: 0;
}

.cs-stat-block h2 {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1;
  margin-bottom: 0.25rem;
  color: var(--menu-ink);
}

.cs-pull-quote {
  padding: 1.5rem 0;
  margin: 2rem 0;
  font-style: italic;
  font-size: 1.15rem;
  line-height: 1.75;
  color: #555;
}

.cs-step-number {
  font-family: Lato, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif, "PT Serif", Times, "Times New Roman", Georgia, serif;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--menu-stone);
  text-transform: uppercase;
}

.cs-feature-card {
  border: 1px solid var(--menu-mist);
  border-radius: 4px;
  padding: 1.5rem;
  height: 100%;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.cs-feature-card:hover {
  border-color: var(--menu-amber);
  box-shadow: 0 4px 20px rgba(213, 173, 120, 0.15);
}

.cs-feature-icon {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
  display: block;
}

.process-connector {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--menu-amber);
  font-size: 1.25rem;
  padding: 0 0.5rem;
}

.bg-near-white {
  background-color: var(--menu-offwhite);
}

.text-serif {
  font-family: Lato, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif, "PT Serif", Times, "Times New Roman", Georgia, serif;
}

/* ── UI design sections ── */
.cs-swatch {
  width: 72px;
  height: 72px;
  border-radius: 120px;
  margin-bottom: 0.75rem;
}

.cs-swatch-label {
  font-family: Lato, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif, "PT Serif", Times, "Times New Roman", Georgia, serif;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--menu-stone);
}

.cs-swatch-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--menu-ink);
  margin-bottom: 0.15rem;
}

.cs-type-row {
  border-bottom: 1px solid var(--menu-mist);
  padding: 1.25rem 0;
}

.cs-type-row:last-child {
  border-bottom: none;
}

.cs-screen-annotation {
  padding: 0.75rem 0;
  margin-bottom: 0.5rem;
  font-size: 0.88rem;
  color: #444;
  line-height: 1.5;
  border-bottom: 1px solid var(--menu-mist);
}

.cs-screen-annotation:last-child {
  border-bottom: none;
}

.cs-screen-annotation strong {
  font-weight: 700;
  color: var(--menu-ink);
  display: block;
  margin-bottom: 0.2rem;
}

.cs-principle-number {
  font-family: Lato, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif, "PT Serif", Times, "Times New Roman", Georgia, serif;
  font-size: 2.5rem;
  font-weight: 800;
  color: rgba(213, 173, 120, 0.35);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.cs-grid-demo {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px;
}

.cs-grid-col {
  background: rgba(213, 173, 120, 0.12);
  height: 80px;
  border-radius: 2px;
}

/* ── Amber CTA button ── */
.btn-amber {
  display: inline-block;
  border: 1.5px solid var(--menu-amber);
  color: var(--menu-amber);
  background: transparent;
  padding: 0.5rem 1.75rem;
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: 2px;
  transition: background 0.2s ease, color 0.2s ease;
  text-decoration: none;
}

.btn-amber:hover {
  background: var(--menu-amber);
  color: var(--menu-white);
  text-decoration: none;
}

/* ── Discovery accordion ── */
.cs-accordion {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.cs-accordion-item {
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid rgba(213, 173, 120, 0.18);
  transition: box-shadow 0.25s ease;
}

.cs-accordion-item--1 {
  background: linear-gradient(120deg, rgba(213, 173, 120, 0.20) 0%, rgba(242, 242, 242, 0.55) 100%);
}

.cs-accordion-item--2 {
  background: linear-gradient(120deg, rgba(213, 173, 120, 0.13) 0%, rgba(250, 250, 250, 0.60) 100%);
}

.cs-accordion-item--3 {
  background: linear-gradient(120deg, rgba(213, 173, 120, 0.07) 0%, rgba(255, 255, 255, 0.70) 100%);
}

.cs-accordion-item[open] {
  box-shadow: 0 4px 24px rgba(213, 173, 120, 0.14);
  border-color: rgba(213, 173, 120, 0.35);
}

.cs-accordion-header {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 1.4rem 1.75rem;
  cursor: pointer;
  list-style: none;
  user-select: none;
}

.cs-accordion-header::-webkit-details-marker {
  display: none;
}

.cs-accordion-title {
  flex: 1;
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--menu-ink);
}

.cs-accordion-arrow {
  color: var(--menu-amber);
  font-size: 1.35rem;
  font-weight: 300;
  line-height: 1;
  transition: transform 0.22s ease;
  display: inline-block;
}

.cs-accordion-item[open] .cs-accordion-arrow {
  transform: rotate(45deg);
}

.cs-accordion-body {
  padding: 0 1.75rem 1.5rem;
  color: #555;
}

/* ── Challenge — full-bleed dark section ── */
.cs-challenge-section {
  position: relative;
  background-image: url('../images/taiwan-groumet.png');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.cs-challenge-overlay {
  position: absolute;
  inset: 0;
  background: rgba(14, 10, 6, 0.74);
  pointer-events: none;
}

.cs-challenge-label {
  color: rgba(213, 173, 120, 0.85);
}

.cs-challenge-body {
  color: rgba(255, 255, 255, 0.82);
  font-weight: 400;
}

.cs-challenge-quote {
  color: rgba(255, 255, 255, 0.65);
  border-color: transparent;
  background: rgba(213, 173, 120, 0.10);
  border-left: 2px solid rgba(213, 173, 120, 0.45);
  padding-left: 1.5rem;
}

/* ── Interview case · daily life photo carousel ── */
.cs-interview-life-strip {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  cursor: grab;
}

.cs-interview-life-strip::-webkit-scrollbar {
  display: none;
}

.cs-interview-life-strip:active {
  cursor: grabbing;
}

.cs-interview-life-photo {
  flex: 0 0 calc(16% - 4px);
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 6px;
  background: var(--menu-mist);
  scroll-snap-align: start;
  pointer-events: none;
}

@media (max-width: 768px) {
  .cs-interview-life-photo {
    flex: 0 0 calc(24% - 4px);
  }
}