/* Case study pages — Apple-inspired, matches index.html tokens & nav */
@import url("../assets/design-tokens.css");

/* Surface colors: html[data-canvas="case-study"] + data-theme (see design-tokens.css) */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: Inter, system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--body-text);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  padding-top: var(--space-12);
}

a {
  color: inherit;
  text-decoration: none;
}

:focus-visible {
  outline: 2px solid var(--accent-ink);
  outline-offset: 2px;
}

/* ── Nav (match index.html) ─────────────────────────────── */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--space-12);
  display: flex;
  align-items: center;
  background: var(--nav-bg);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--nav-border);
  transition: box-shadow 0.2s;
}

nav.scrolled {
  box-shadow: var(--nav-shadow-scrolled);
}

.nav-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 var(--page-inline);
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 15px;
  font-weight: 800;
  letter-spacing: -0.35px;
  color: var(--heading-on-light);
}

.nav-logo span {
  color: var(--accent-ink);
}

.nav-links {
  display: flex;
  gap: var(--space-8);
  align-items: center;
}

.nav-links a {
  font-size: 14px;
  font-weight: 600;
  color: var(--nav-text);
  transition: color 0.15s;
}

.nav-links a:hover {
  color: var(--heading-on-light);
}

.nav-cta {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-ink) !important;
  border: 1.5px solid var(--accent-ink);
  padding: var(--space-2) var(--space-4);
  border-radius: 6px;
  transition: background 0.15s, color 0.15s !important;
}

.nav-cta:hover {
  background: var(--accent);
  color: var(--btn-primary-fg) !important;
}

.theme-cycle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--nav-text);
  font-size: 16px;
  line-height: 1;
  cursor: pointer;
  font-family: inherit;
  transition:
    background 0.15s,
    color 0.15s,
    border-color 0.15s;
}

.theme-cycle:hover {
  background: var(--bg-off);
  color: var(--heading-on-light);
  border-color: var(--border);
}

/* ── Layout shell ───────────────────────────────────────── */
.cs-inner {
  max-width: var(--cs-max);
  margin: 0 auto;
  padding: 0 var(--page-inline);
}

.cs-section-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--label-caps);
  margin-bottom: var(--space-4);
}

.cs-section-kicker-dark {
  color: rgba(255, 255, 255, 0.45);
}

.cs-moment {
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.15;
  color: var(--heading-on-light);
  margin-bottom: var(--space-6);
}

.cs-moment--dark {
  color: #fff;
}

.cs-submoment {
  font-size: clamp(20px, 2.6vw, 28px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  color: var(--heading-on-light);
  margin-bottom: var(--space-4);
}

.cs-body {
  font-size: 17px;
  line-height: 1.75;
  color: var(--body-text);
  max-width: 65ch;
}

.cs-body--narrow {
  max-width: 62ch;
}

/* ── HERO (dark) ────────────────────────────────────────── */
.cs-hero {
  background: var(--cs-dark);
  color: #fff;
  padding: var(--space-15) 0 var(--space-10);
}

.cs-hero-title {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 800;
  letter-spacing: -0.045em;
  line-height: 1.05;
  margin-bottom: var(--space-5);
  color: #fff;
}

/* Gradient phrase on dark hero — white → accent (tokens alone assume light “ink → accent”) */
.cs-hero .text-gradient {
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.96) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  color: transparent;
}

.cs-hero-tagline {
  font-size: clamp(16px, 2vw, 19px);
  font-weight: 500;
  color: rgba(255, 255, 255, 0.62);
  max-width: 40rem;
  margin-bottom: var(--space-6);
}

.cs-hero-pills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-10);
}

.cs-hero-pill {
  font-size: 13px;
  font-weight: 500;
  padding: calc(var(--space-2) - 1px) calc(var(--space-3) + var(--space-2));
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.78);
}

.cs-hero-pill--hi {
  background: rgba(26, 115, 232, 0.22);
  border-color: rgba(26, 115, 232, 0.45);
  color: var(--accent-soft);
}

.cs-hero-media {
  margin: 0;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
}

.cs-hero-media img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: contain;
}

/* ── METRICS STRIP ─────────────────────────────────────── */
.cs-metrics {
  background: var(--cs-band-bg);
  padding: var(--space-12) 0;
  border-bottom: 1px solid var(--border);
}

.cs-metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-8);
}

.cs-stat-num {
  font-size: clamp(36px, 5vw, 52px);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--heading-on-light);
  margin-bottom: var(--space-3);
}

.cs-stat-num span {
  color: var(--accent-ink);
}

.cs-stat-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--label-caps);
  max-width: 12rem;
}

.cs-stat-num--text {
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1.1;
}

/* ── CONTEXT ────────────────────────────────────────────── */
.cs-context {
  background: var(--bg-section);
  padding: var(--space-12) 0;
}

.cs-context-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-10) var(--space-14);
}

.cs-context-block-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--label-caps);
  margin-bottom: 6px;
}

.cs-context-block-value {
  font-size: 16px;
  font-weight: 600;
  color: var(--heading-on-light);
  line-height: 1.45;
}

/* ── PROBLEM ────────────────────────────────────────────── */
.cs-problem {
  background: var(--bg);
  padding: var(--space-14) 0;
}

.cs-pain-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-6);
  margin-top: var(--space-10);
}

.cs-pain-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: var(--space-6);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.04);
}

.cs-pain-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--heading-on-light);
  margin-bottom: var(--space-3);
}

.cs-pain-body {
  font-size: 15px;
  line-height: 1.65;
  color: var(--mid);
}

/* ── ROLE ───────────────────────────────────────────────── */
.cs-role {
  background: var(--bg-section);
  padding: var(--space-14) 0;
}

.cs-role-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-10);
  margin-top: var(--space-6);
}

.cs-role-col-title {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--label-caps);
  margin-bottom: var(--space-4);
}

.cs-role-col p {
  font-size: 17px;
  line-height: 1.75;
  color: var(--body-text);
}

.cs-role-col p + p {
  margin-top: var(--space-4);
}

/* ── PROCESS (icon card grid) ───────────────────────────── */
.cs-process {
  background: var(--bg);
  padding: var(--space-14) 0;
}

.cs-process-grid {
  display: flex;
  align-items: stretch;
  overflow-x: auto;
  overflow-y: visible;
  gap: var(--space-4);
  margin-top: var(--space-10);
  padding: 0 2px var(--space-2);
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  scrollbar-width: none; /* Firefox */
  position: relative;
}

.cs-process-grid::-webkit-scrollbar {
  width: 0;
  height: 0;
}

.cs-process-nav {
  position: absolute;
  right: var(--space-5);
  bottom: var(--space-4);
  width: 38px;
  height: 38px;
  border-radius: 999px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(0, 0, 0, 0.08);
  background: rgba(255, 255, 255, 0.65);
  backdrop-filter: blur(10px);
  color: var(--mid);
  cursor: pointer;
  z-index: 5;
  transition: transform 0.15s ease, background 0.2s ease, opacity 0.2s ease;
}

.cs-process-nav:hover {
  transform: translateY(-1px);
  background: rgba(255, 255, 255, 0.82);
}

.cs-process-nav:active {
  transform: translateY(0);
}

.cs-process-nav:disabled {
  cursor: default;
  opacity: 0.35;
}

.cs-process-nav svg {
  width: 18px;
  height: 18px;
  display: block;
}

.cs-process-icon-card {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: var(--space-6);
  background: var(--surface-raised);
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 100%;

  /* Horizontal rail sizing */
  flex: 0 0 clamp(240px, 28vw, 320px);
  scroll-snap-align: center;
  transition:
    border-color 0.2s ease,
    background 0.2s ease;
}

.cs-process-icon,
.cs-process-emoji {
  font-size: 48px;
  line-height: 1;
  margin-bottom: var(--space-4);
}

.cs-process-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  color: var(--heading-on-light);
  will-change: transform;
}

.cs-process-icon svg {
  width: 100%;
  height: 100%;
  display: block;
}

.cs-process-step-num {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--label-caps);
  margin-bottom: var(--space-2);
}

.cs-process-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--heading-on-light);
  margin-bottom: var(--space-3);
  letter-spacing: -0.02em;
}

.cs-process-desc {
  font-size: 14px;
  line-height: 1.65;
  color: var(--mid);
  flex: 1;
}

.cs-process-icon-card.is-active {
  border-color: var(--accent-soft);
  background: var(--bg-off);
}

/* ── DECISIONS (dark bento) ─────────────────────────────── */
.cs-decisions {
  background: var(--cs-dark);
  color: #fff;
  padding: var(--space-15) 0;
}

.cs-bento {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-6);
  margin-top: var(--space-10);
}

.cs-bento-card {
  background: var(--cs-dark-elevated);
  border: 1px solid var(--cs-dark-border);
  border-radius: 16px;
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.cs-bento-title {
  font-size: clamp(18px, 2.2vw, 22px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.cs-bento-options {
  font-size: 12px;
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.45);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.cs-bento-chosen {
  font-size: 15px;
  font-weight: 600;
  color: var(--accent-soft);
  line-height: 1.5;
}

.cs-bento-why {
  font-size: 15px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.82);
}

/* ── VISUALS (tabs + dark bento gallery) ───────────────── */
.cs-visuals {
  background: var(--bg-section);
  padding: var(--space-14) 0;
}

.cs-visuals-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-8);
  margin-bottom: var(--space-6);
}

.cs-vtab {
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  padding: 10px 18px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--mid);
  cursor: pointer;
  transition:
    background 0.2s ease,
    color 0.2s ease,
    border-color 0.2s ease;
}

.cs-vtab:hover {
  border-color: var(--mid);
  color: var(--heading-on-light);
}

.cs-vtab.is-active {
  background: var(--cs-dark);
  color: #fff;
  border-color: var(--cs-dark);
}

.cs-bento-stage {
  display: grid;
  margin-top: var(--space-2);
}

.cs-bento-panel {
  grid-area: 1 / 1;
  opacity: 0;
  pointer-events: none;
  transition: opacity 200ms ease;
  z-index: 0;
}

.cs-bento-panel.is-active {
  opacity: 1;
  pointer-events: auto;
  z-index: 1;
}

.cs-bento-dark {
  background: var(--cs-dark);
  border-radius: 16px;
  padding: var(--space-6);
}

.cs-bento-stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.cs-bento-duo {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.cs-bento-img-card {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  background: #000;
}

.cs-bento-img-card--featured {
  aspect-ratio: 16 / 9;
}

.cs-bento-duo .cs-bento-img-card {
  aspect-ratio: 4 / 3;
}

.cs-bento-panel--pair .cs-bento-stack > .cs-bento-duo .cs-bento-img-card {
  aspect-ratio: 4 / 3;
}

.cs-bento-img-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 200ms ease;
  vertical-align: middle;
}

.cs-bento-img-card:hover img {
  transform: scale(1.01);
}

.cs-bento-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: flex-start;
  padding: var(--space-4);
  background: linear-gradient(to top, rgba(0, 0, 0, 0.72) 0%, rgba(0, 0, 0, 0.2) 45%, transparent 75%);
  pointer-events: none;
}

.cs-bento-cap {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  line-height: 1.3;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.35);
}

.cs-bento-sub {
  font-size: 12px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.65);
  margin-top: 4px;
  max-width: 36ch;
  line-height: 1.4;
}

/* ── OUTCOMES (dark stat shell) ─────────────────────────── */
.cs-outcomes {
  background: var(--bg);
  padding: var(--space-14) 0;
}

.cs-outcomes-shell {
  background: #0a0a0a;
  border-radius: 16px;
  padding: var(--space-10);
  margin-top: var(--space-10);
}

.cs-outcome-stat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
}

.cs-outcome-stat {
  padding: var(--space-6) 0;
  border-bottom: 1px solid #222222;
}

.cs-outcome-stat-grid > .cs-outcome-stat:last-child {
  border-bottom: none;
}

.cs-outcome-stat--full {
  grid-column: 1 / -1;
}

.cs-outcome-num {
  font-size: 64px;
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
  color: #ffffff;
}

.cs-outcome-num--accent {
  color: var(--accent);
}

.cs-outcome-num--compact {
  font-size: clamp(40px, 8vw, 56px);
}

.cs-outcome-label {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #888888;
  margin-top: var(--space-3);
}

.cs-outcome-context {
  font-size: 15px;
  line-height: 1.5;
  color: #cccccc;
  margin-top: var(--space-3);
  max-width: 42ch;
}

.cs-outcome-bar-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  margin-top: var(--space-6);
  max-width: 520px;
}

.cs-outcome-bar-col-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: #aaa;
  margin-bottom: var(--space-2);
}

.cs-outcome-bar-track {
  height: 8px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.08);
  overflow: hidden;
}

.cs-outcome-bar-fill {
  height: 100%;
  border-radius: 4px;
  width: 0;
  transition: width 1s ease-out;
}

.cs-outcome-bar-fill--before {
  background: #6b6b6b;
}

.cs-outcome-bar-fill--before-alert {
  background: #8b4040;
}

.cs-outcome-bar-fill--after {
  background: var(--accent);
}

.cs-outcome-bar-fill--after-green {
  background: var(--green);
}

.cs-outcome-uplift-pair {
  display: flex;
  align-items: flex-end;
  gap: var(--space-6);
  margin-top: var(--space-6);
  max-width: 480px;
}

.cs-outcome-uplift-col {
  flex: 1;
}

.cs-outcome-uplift-col--after {
  flex: 1.18;
}

.cs-outcome-note {
  margin-top: var(--space-10);
  font-size: 17px;
  line-height: 1.75;
  color: var(--body-text);
  max-width: 65ch;
}

.cs-outcome-note--on-dark {
  color: rgba(255, 255, 255, 0.72);
  max-width: 58ch;
}

/* ── REFLECTION ───────────────────────────────────────── */
.cs-reflection {
  background: var(--bg-section);
  padding: var(--space-14) 0;
}

.cs-reflection-block {
  margin-top: var(--space-8);
}

.cs-reflection-block p {
  font-size: 17px;
  line-height: 1.8;
  color: var(--body-text);
  max-width: 62ch;
}

.cs-reflection-block p + p {
  margin-top: var(--space-6);
}

.cs-reflection-lead {
  font-weight: 700;
  font-style: italic;
  color: var(--heading-on-light);
}

/* ── DOC FIGURES (workshop artifacts, flows) ──────────── */
.cs-doc-section {
  padding: var(--space-14) 0;
  background: var(--bg);
}

.cs-doc-section--tint {
  background: var(--bg-section);
}

.cs-doc-stack {
  margin-top: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-10);
}

.cs-doc-figure {
  margin: 0;
}

/* Readable diagram defaults — avoid stretching bitmaps; preserve aspect ratio */
.cs-doc-figure img {
  width: auto;
  max-width: 100%;
  height: auto;
  display: block;
  margin-left: auto;
  margin-right: auto;
  border-radius: 12px;
  border: 1px solid var(--border);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
  object-fit: contain;
}

/* When a full-bleed diagram should use full column width (still height: auto) */
.cs-doc-figure--wide img {
  width: 100%;
  max-width: 100%;
}

/* ── Horizontal flow rail (wide flowcharts / swimlanes) ───────── */
.cs-flow-rail {
  margin-top: var(--space-8);
}

.cs-flow-rail-hint {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 13px;
  font-weight: 600;
  color: var(--label-caps);
  margin: 0 0 var(--space-4);
}

.cs-flow-rail-hint::after {
  content: "→";
  font-weight: 700;
  opacity: 0.55;
}

.cs-flow-rail-track {
  display: flex;
  flex-direction: row;
  gap: var(--space-6);
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x mandatory;
  scroll-padding-inline: var(--page-inline);
  padding: var(--space-2) var(--page-inline) var(--space-6);
  margin: 0 calc(-1 * var(--page-inline));
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.cs-flow-rail-track:focus-within {
  outline: none;
}

.cs-flow-slide {
  flex: 0 0 auto;
  scroll-snap-align: start;
  width: min(960px, calc(100vw - 3rem));
  max-width: calc(100vw - 3rem);
  margin: 0;
}

.cs-flow-slide img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 12px;
  border: 1px solid var(--border);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
  background: var(--bg-section);
}

@media (max-width: 600px) {
  .cs-flow-rail-track {
    margin: 0 -20px;
    scroll-padding-inline: 20px;
    padding-inline: 20px;
  }

  .cs-flow-slide {
    width: min(920px, calc(100vw - 2.5rem));
  }
}

/* ── Solution comparison cards (matrix alternative) ─────────── */
.cs-matrix-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-6);
  margin-top: var(--space-8);
}

.cs-matrix-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: var(--space-6);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.05);
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.cs-matrix-card--note {
  background: var(--bg-section);
  font-size: 14px;
  line-height: 1.55;
  color: var(--mid);
}

.cs-matrix-num {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--accent-ink);
  margin-bottom: var(--space-2);
}

.cs-matrix-card h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--heading-on-light);
  line-height: 1.3;
  margin: 0 0 var(--space-3);
}

.cs-matrix-card .cs-matrix-lead {
  font-size: 14px;
  line-height: 1.55;
  color: var(--body-text);
  margin: 0 0 var(--space-5);
}

.cs-matrix-card dl {
  margin: 0;
  font-size: 13px;
  line-height: 1.5;
  color: var(--body-text);
}

.cs-matrix-card dt {
  font-weight: 700;
  color: var(--heading-on-light);
  margin-top: var(--space-3);
}

.cs-matrix-card dt:first-child {
  margin-top: 0;
}

.cs-matrix-card dd {
  margin: var(--space-1) 0 0;
  padding-left: 0;
}

.cs-matrix-card dd ul {
  margin: var(--space-2) 0 0;
  padding-left: 1.1rem;
}

.cs-matrix-card dd li + li {
  margin-top: 4px;
}

.cs-matrix-expand {
  margin-top: var(--space-8);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: var(--space-4) var(--space-5);
  background: var(--bg-section);
}

.cs-matrix-expand summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 14px;
  color: var(--heading-on-light);
  list-style: none;
}

.cs-matrix-expand summary::-webkit-details-marker {
  display: none;
}

.cs-matrix-expand[open] summary {
  margin-bottom: var(--space-4);
}

.cs-doc-caption {
  margin-top: var(--space-4);
  font-size: 14px;
  line-height: 1.55;
  color: var(--mid);
  max-width: 72ch;
}

.cs-deck-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-6);
  font-size: 15px;
  font-weight: 600;
  color: var(--accent-ink);
  border-bottom: 1px solid rgba(0, 20, 14, 0.25);
  padding-bottom: 2px;
  width: fit-content;
}

.cs-deck-link:hover {
  color: var(--heading-on-light);
  border-bottom-color: var(--heading-on-light);
}

.cs-inline-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--border);
}

.cs-inline-links a {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent-ink);
}

.cs-inline-links a:hover {
  color: var(--heading-on-light);
}

.cs-proposal-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  margin-top: var(--space-10);
  align-items: start;
}

.cs-proposal-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: var(--space-6);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.04);
}

.cs-proposal-card h3 {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--label-caps);
  margin-bottom: var(--space-4);
}

.cs-proposal-card ul {
  margin: 0;
  padding-left: 1.15rem;
  font-size: 15px;
  line-height: 1.65;
  color: var(--body-text);
}

.cs-proposal-card li + li {
  margin-top: var(--space-3);
}

.cs-doc-trio {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-6);
  margin-top: var(--space-10);
}

.cs-doc-trio .cs-doc-figure {
  min-width: 0;
}

.cs-doc-trio .cs-doc-figure img {
  width: 100%;
  max-width: 100%;
  max-height: min(70vh, 720px);
  height: auto;
  object-fit: contain;
  object-position: top center;
  background: var(--bg-section);
}

.cs-doc-quartet {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-8);
  margin-top: var(--space-10);
}

.cs-doc-quartet .cs-doc-figure img {
  width: 100%;
  max-width: 100%;
  max-height: min(75vh, 780px);
  height: auto;
  object-fit: contain;
  object-position: top center;
  background: var(--bg-section);
}

@media (max-width: 900px) {
  .cs-proposal-pair {
    grid-template-columns: 1fr;
  }

  .cs-doc-trio {
    grid-template-columns: 1fr;
  }

  .cs-doc-quartet {
    grid-template-columns: 1fr;
  }

  .cs-matrix-grid {
    grid-template-columns: 1fr;
  }
}

/* ── FOOTER NAV ───────────────────────────────────────── */
.cs-footer {
  background: var(--cs-dark);
  color: #fff;
  padding: var(--space-12) 0 var(--space-14);
}

.cs-footer-inner {
  max-width: var(--cs-max);
  margin: 0 auto;
  padding: 0 var(--page-inline);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-6);
  flex-wrap: wrap;
}

.cs-footer-col {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-4);
}

.cs-footer a {
  font-size: clamp(16px, 2vw, 20px);
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.02em;
  transition: color 0.15s;
}

.cs-footer a:hover {
  color: var(--accent-soft);
}

@media (max-width: 1100px) {
  .cs-process-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    overflow-x: visible;
    padding: 0;
    scroll-snap-type: none;
    gap: var(--space-4);
  }

  .cs-process-nav {
    display: none;
  }

  .cs-process-icon-card {
    flex: initial;
    width: auto;
    scroll-snap-align: unset;
  }
}

@media (max-width: 900px) {
  .cs-process-grid {
    display: grid;
    grid-template-columns: 1fr;
    overflow-x: visible;
    padding: 0;
    scroll-snap-type: none;
  }

  .cs-metrics-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .cs-context-grid,
  .cs-role-grid,
  .cs-pain-grid,
  .cs-bento {
    grid-template-columns: 1fr;
  }

  .cs-bento-duo {
    grid-template-columns: 1fr;
  }

  .cs-outcome-stat-grid {
    grid-template-columns: 1fr;
  }

  .cs-outcome-stat--full {
    grid-column: auto;
  }

  .cs-outcome-bar-pair {
    grid-template-columns: 1fr;
  }

  .cs-outcome-uplift-pair {
    flex-direction: column;
    align-items: stretch;
  }

  .cs-outcome-uplift-col--after {
    flex: 1;
  }
}

/* ── Accordion: text-only OR one-open + optional media stage (Apple-style) ── */
.cs-accordion {
  padding: var(--space-14) 0;
  background: var(--bg-section);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.cs-accordion--flush {
  background: transparent;
  border: none;
  padding: var(--space-12) 0;
}

.cs-accordion__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.35fr);
  gap: var(--space-10) var(--space-12);
  align-items: start;
  margin-top: var(--space-8);
}

.cs-accordion__shell {
  min-width: 0;
}

.cs-accordion__shell--solo {
  max-width: 42rem;
  margin-top: var(--space-8);
}

.cs-accordion__item {
  border-bottom: 1px solid var(--hairline);
}

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

.cs-accordion__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  padding: var(--space-6) 0;
  border: none;
  background: none;
  text-align: left;
  font: inherit;
  cursor: pointer;
  color: inherit;
}

.cs-accordion__title {
  flex: 1;
  min-width: 0;
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: var(--heading-on-light);
}

.cs-accordion__item.is-open .cs-accordion__title {
  color: var(--accent-ink);
}

.cs-accordion__chevron {
  flex-shrink: 0;
  font-size: 22px;
  font-weight: 500;
  line-height: 1;
  color: var(--mid);
  transition:
    transform 200ms ease,
    color 200ms ease;
}

.cs-accordion__chevron svg {
  width: 1em;
  height: 1em;
  display: block;
}

.cs-accordion__item.is-open .cs-accordion__chevron {
  transform: rotate(180deg);
  color: var(--accent-ink);
}

.cs-accordion__panel {
  overflow: hidden;
  max-height: 0;
  transition: max-height 320ms ease;
}

.cs-accordion__item.is-open .cs-accordion__panel {
  max-height: 24rem;
}

.cs-accordion__body {
  margin: 0;
  padding: 0 0 var(--space-6);
  padding-top: var(--space-2);
  font-size: 16px;
  line-height: 1.7;
  color: var(--body-text);
  max-width: 40rem;
}

.cs-accordion__stage {
  position: relative;
  margin: 0;
  border-radius: 20px;
  overflow: hidden;
  background: var(--surface-raised);
  border: 1px solid var(--hairline);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08);
  aspect-ratio: 4 / 3;
  min-height: 220px;
}

html[data-theme="dark"] .cs-accordion__stage {
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.45);
}

.cs-accordion__figure {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  vertical-align: middle;
  transition: opacity 220ms ease;
}

.cs-accordion__figure.is-swapping {
  opacity: 0.55;
}

@media (prefers-reduced-motion: reduce) {
  .cs-accordion__panel,
  .cs-accordion__chevron,
  .cs-accordion__figure {
    transition: none;
  }
}

@media (max-width: 900px) {
  .cs-accordion__grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .cs-accordion__stage {
    order: -1;
    max-height: 52vh;
    aspect-ratio: 16 / 10;
  }
}

@media (max-width: 600px) {
  body {
    padding-top: var(--space-12);
  }

  .nav-links .nav-hide {
    display: none;
  }

  .nav-links {
    gap: var(--space-4);
  }

  .cs-metrics-grid {
    grid-template-columns: 1fr;
  }

  .cs-process-grid {
    display: grid;
    grid-template-columns: 1fr;
    overflow-x: visible;
    padding: 0;
    scroll-snap-type: none;
  }

  .cs-outcomes-shell {
    padding: var(--space-6);
  }

  .cs-outcome-num {
    font-size: 48px;
  }

  .cs-inner,
  .cs-footer-inner {
    padding: 0 20px;
  }

  .cs-visuals-tabs {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: var(--space-2);
    -webkit-overflow-scrolling: touch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .cs-bar-fill {
    transition: none;
  }
}