/* ============================================================
   Syra Singh — Case Study stylesheet
   Shared across all /cs-*.html pages
   ============================================================ */

:root {
  --bg:        #FAFAF7;
  --ink:       #0F0F10;
  --ink-2:     #2A2A2C;
  --muted:     #7A7A7C;
  --soft:      #B5B5B6;
  --line:      #E5E2D8;
  --surface:   #F2F0EA;
  --surface-2: #ECE9DF;
  --accent:    #B8543A;
  --accent-2:  #F5EDE9;

  --serif: 'Instrument Serif', 'Cormorant Garamond', Georgia, serif;
  --sans:  'Geist', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', sans-serif;
  --mono:  'Geist Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}

*,*::before,*::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  letter-spacing: -0.005em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: inherit; text-decoration: none; }
::selection { background: var(--ink); color: var(--bg); }

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 400;
  letter-spacing: -0.015em;
  line-height: 1.05;
  margin: 0;
}
h1 { font-size: clamp(2.4rem, 6vw, 4.4rem); }
h2 { font-size: clamp(1.8rem, 4vw, 2.8rem); }
h3 { font-size: clamp(1.35rem, 2vw, 1.7rem); }
em, .i { font-style: italic; }
p { margin: 0 0 1.1em; color: var(--ink-2); }
img { display: block; max-width: 100%; }

.wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 clamp(1.4rem, 5vw, 2.4rem);
}
.wrap.wide {
  max-width: 1180px;
}

.eyebrow {
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 1rem;
}

/* ============================================================
   Top nav
   ============================================================ */
header.cs-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(250, 250, 247, 0.86);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line);
}
header.cs-nav nav {
  max-width: 1180px;
  margin: 0 auto;
  padding: 1rem clamp(1.4rem, 4vw, 3rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
header.cs-nav .back {
  font-family: var(--mono);
  font-size: 0.84rem;
  color: var(--ink-2);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: color .2s, gap .25s;
}
header.cs-nav .back:hover { color: var(--accent); gap: 0.7rem; }
header.cs-nav .brand {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.4rem;
}
header.cs-nav .right {
  font-family: var(--mono);
  font-size: 0.84rem;
  color: var(--muted);
}
header.cs-nav .right a { color: var(--ink-2); transition: color .2s; }
header.cs-nav .right a:hover { color: var(--accent); }

/* ============================================================
   Case study hero
   ============================================================ */
.cs-hero {
  padding: clamp(3rem, 8vw, 6rem) 0 clamp(2rem, 5vw, 4rem);
}
.cs-hero h1 {
  max-width: 22ch;
  margin: 0.4rem 0 1.4rem;
}
.cs-hero h1 em { color: var(--accent); }
.cs-hero .sub {
  font-size: 1.18rem;
  color: var(--ink-2);
  max-width: 60ch;
  margin: 0 0 2rem;
}
.cs-hero .tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.6rem;
}
.cs-hero .tag {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 0.3rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 999px;
}
.cs-hero .meta-line {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--muted);
  letter-spacing: 0.02em;
  padding-top: 1.4rem;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}
.cs-hero .meta-line b { color: var(--ink); font-weight: 500; }

/* ============================================================
   Stat band — 3 numbers
   ============================================================ */
.stat-band {
  background: var(--surface);
  padding: clamp(2.5rem, 5vw, 4rem) 0;
  margin: clamp(2.5rem, 5vw, 4rem) 0;
}
.stat-band .grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.2rem, 3vw, 2rem);
  max-width: 900px;
  margin: 0 auto;
  padding: 0 clamp(1.4rem, 4vw, 2.4rem);
}
@media (max-width: 720px) { .stat-band .grid { grid-template-columns: 1fr; gap: 1.6rem; } }
.stat-band .stat .n {
  font-family: var(--serif);
  font-size: clamp(2.4rem, 4.5vw, 3.6rem);
  line-height: 1;
  font-style: italic;
  color: var(--ink);
  display: block;
  margin-bottom: 0.5rem;
}
.stat-band .stat .l {
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  max-width: 24ch;
  line-height: 1.4;
}

/* ============================================================
   Long-form sections
   ============================================================ */
.cs-section {
  padding: clamp(2rem, 4vw, 3rem) 0;
}
.cs-section .sec-eyebrow {
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.7rem;
}
.cs-section h2 {
  max-width: 32ch;
  margin-bottom: 1.6rem;
}
.cs-section h2 em { color: var(--accent); }
.cs-section p {
  font-size: 1.08rem;
  line-height: 1.72;
  max-width: 64ch;
}
.cs-section p b, .cs-section li b { color: var(--ink); font-weight: 500; }
.cs-section ul {
  padding-left: 0;
  list-style: none;
  margin: 1.4rem 0;
  max-width: 64ch;
}
.cs-section ul li {
  font-size: 1.04rem;
  line-height: 1.65;
  color: var(--ink-2);
  padding-left: 1.6rem;
  position: relative;
  margin-bottom: 0.75rem;
}
.cs-section ul li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--accent);
}

/* Pull quote */
.pullquote {
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  line-height: 1.3;
  color: var(--ink);
  max-width: 28ch;
  margin: clamp(2.5rem, 4vw, 3.5rem) auto;
  text-align: center;
  position: relative;
  padding: 0 1rem;
}
.pullquote::before, .pullquote::after {
  content: "";
  display: block;
  width: 40px;
  height: 1px;
  background: var(--accent);
  margin: 1.4rem auto;
}

/* Process steps — 4 cards */
.process {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin: 2rem 0;
}

.process.mova-personas {
  grid-template-columns: repeat(3, 1fr);
  width: 100%;
  margin: 2rem 0;
}

.process.mova-personas .step {
  min-width: 0;
}

.process.mova-priorities {
  grid-template-columns: repeat(3, 1fr);
  width: 100%;
  margin: 2rem 0;
}

.process.mova-priorities .step {
  min-width: 0;
}

@media (max-width: 760px) { .process { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .process { grid-template-columns: 1fr; } }
.process .step {
  padding: 1.4rem 1.2rem;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 6px;
}
.process .step .n {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 0.6rem;
  text-transform: uppercase;
}
.process .step h4 {
  font-family: var(--serif);
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}
.process .step p {
  font-size: 0.88rem;
  color: var(--ink-2);
  line-height: 1.5;
  margin: 0;
}

/* Workflow screenshot — align with .process grid above */
.case-image {
  margin: clamp(2.75rem, 5vw, 4rem) 0 0;
  padding: 0;
  width: 100%;
}
.case-image-open {
  display: block;
  width: 100%;
  padding: 0;
  border: none;
  background: none;
  cursor: zoom-in;
  border-radius: 6px;
  text-align: left;
}
.case-image-open:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
.case-image-open img {
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: 6px;
  transition: border-color 0.2s, opacity 0.2s;
}
.case-image-open:hover img {
  border-color: var(--accent);
  opacity: 0.94;
}
.case-image-hint,
.case-image figcaption,
.image-lightbox-hint {
  font-family: var(--sans);
  font-size: 1.02rem;
  line-height: 1.65;
  letter-spacing: -0.005em;
  margin: 0;
}
.case-image-hint {
  margin-top: 0.65rem;
  color: var(--muted);
}
.case-image figcaption {
  margin-top: 0.75rem;
  color: var(--ink-2);
}

/* Full-size image lightbox */
.image-lightbox {
  margin: 0;
  padding: 0;
  border: none;
  width: 100%;
  max-width: 100%;
  height: 100%;
  max-height: 100%;
  background: transparent;
}
.image-lightbox::backdrop {
  background: rgba(250, 250, 247, 0.94);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.image-lightbox-panel {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.85rem;
  width: 100%;
  height: 100%;
  padding: clamp(1rem, 3vw, 1.75rem);
  box-sizing: border-box;
}
.image-lightbox-toolbar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  flex-shrink: 0;
}
.image-lightbox-btn {
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--bg);
  color: var(--ink-2);
  font-family: var(--sans);
  font-size: 1.2rem;
  line-height: 1;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, opacity 0.2s;
}
.image-lightbox-btn:hover:not(:disabled) {
  color: var(--accent);
  border-color: var(--accent);
}
.image-lightbox-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}
.image-lightbox-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.image-lightbox-level {
  min-width: 3.25rem;
  text-align: center;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--muted);
}
.image-lightbox-viewport {
  flex: 1;
  width: 100%;
  max-width: min(96vw, 1280px);
  overflow: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  cursor: zoom-in;
}
.image-lightbox-viewport.is-zoomed {
  cursor: grab;
}
.image-lightbox-viewport.is-zoomed:active {
  cursor: grabbing;
}
.image-lightbox-img {
  display: block;
  width: auto;
  height: auto;
  max-width: none;
  margin: 0 auto;
  border-radius: 0;
  box-shadow: none;
}
.image-lightbox-hint {
  flex-shrink: 0;
  max-width: 36rem;
  text-align: center;
  color: var(--muted);
}

/* Diagram block — sometimes needed for visual processes */
.diagram {
  margin: 2rem 0;
  padding: clamp(1.5rem, 3vw, 2.5rem);
  background: var(--surface);
  border-radius: 8px;
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--ink-2);
  line-height: 1.7;
  overflow-x: auto;
}

/* Key decision cards */
.decisions {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin: 1.8rem 0;
}
.decision {
  padding: 1.6rem;
  border-left: 3px solid var(--accent);
  background: var(--surface);
  border-radius: 0 6px 6px 0;
}
.decision h4 {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}
.decision p {
  font-size: 0.96rem;
  color: var(--ink-2);
  margin: 0;
  line-height: 1.6;
}

/* Outcome stat row inside content */
.outcomes {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin: 1.8rem 0;
}
@media (max-width: 680px) { .outcomes { grid-template-columns: 1fr; } }
.outcome {
  padding: 1.4rem 1.2rem;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 6px;
}
.outcome .big {
  font-family: var(--serif);
  font-style: italic;
  font-size: 2rem;
  color: var(--ink);
  display: block;
  line-height: 1;
}
.outcome .small {
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-top: 0.6rem;
  display: block;
  line-height: 1.4;
}

/* TODO callout — content I need from Syra */
.todo {
  background: var(--accent-2);
  border-left: 3px solid var(--accent);
  padding: 1rem 1.2rem;
  font-family: var(--mono);
  font-size: 0.86rem;
  color: var(--ink-2);
  line-height: 1.55;
  margin: 1.2rem 0;
  border-radius: 0 4px 4px 0;
}
.todo b { color: var(--accent); font-family: var(--serif); font-style: italic; font-size: 1rem; font-weight: 500; }

/* Divider */
.cs-rule {
  height: 1px;
  background: var(--line);
  max-width: 760px;
  margin: clamp(2rem, 4vw, 3rem) auto;
}

/* Bottom CTA */
.cs-footer {
  text-align: center;
  padding: clamp(4rem, 8vw, 6rem) 0;
}
.cs-footer h2 {
  margin-bottom: 1.2rem;
}
.cs-footer h2 em { color: var(--accent); }
.cs-footer .cta-row {
  display: flex;
  justify-content: center;
  gap: 0.7rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}
.btn {
  font-size: 0.94rem;
  padding: 0.7rem 1.2rem;
  border-radius: 999px;
  border: 1px solid var(--ink);
  color: var(--ink);
  font-family: var(--sans);
  transition: all .25s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.btn:hover { background: var(--ink); color: var(--bg); transform: translateY(-1px); }
.btn.primary { background: var(--ink); color: var(--bg); }
.btn.primary:hover { background: var(--accent); border-color: var(--accent); }

/* Inline external link styling */
.cs-section a.external,
.todo a {
  color: var(--accent);
  border-bottom: 1px solid var(--accent);
  padding-bottom: 1px;
  transition: opacity .2s;
}
.cs-section a.external:hover, .todo a:hover { opacity: 0.7; }

.try-it-out {
  display: block;
  text-align: left;
}

.try-it-out h2 {
  max-width: 18ch;
  margin: 0 0 1rem;
}

.try-it-out p {
  max-width: 60ch;
  margin: 0;
}

.try-it-out .cta-row {
  margin-top: 2rem;
  justify-content: flex-start;
}

/* Footer block */
footer.site {
  padding: 2rem 0 2.5rem;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.03em;
  color: var(--muted);
}
footer.site .wrap {
  max-width: 1180px;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
footer.site b { color: var(--ink); font-weight: 500; font-family: var(--serif); font-style: italic; }

/* Reveal on scroll */
body.has-js .reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .8s ease, transform .8s cubic-bezier(.2,.7,.3,1);
}
body.has-js .reveal.in {
  opacity: 1;
  transform: translateY(0);
}