/* Studi kasus Galeri Portofolio hsn.Studio (case-study.html, alamat /portfolio/case-study).
   Arah desain: editorial gelap dan eksklusif, seperti katalog rumah mode. Hitam hangat,
   gading, sampanye untuk angka, biru logo sebagai aksen. Serif tipis berukuran besar,
   garis rambut, ruang lega. Semua pasangan warna teks lolos kontras WCAG AAA (7:1). */

:root {
  --cs-bg: #0a0908;
  --cs-bg-2: #11100e;
  --cs-bg-3: #1a1815;
  --cs-ink: #f2ede4; /* 17,1:1 */
  --cs-muted: #bdb5a7; /* 9,8:1 */
  --cs-gold: #d4c19a; /* 11,3:1, sampanye untuk angka dan penanda */
  --cs-blue: #8fb8ff; /* 9,9:1, biru logo versi latar gelap */
  --cs-line: rgba(242, 237, 228, 0.12);
  --cs-line-2: rgba(242, 237, 228, 0.22);
  --cs-paper: #f4f0e8;
  --cs-paper-ink: #15130f; /* 16,3:1 */
  --cs-paper-muted: #4a453c; /* 8,4:1 */
  --cs-paper-blue: #0141a3; /* 8,1:1 */
  --cs-serif: "Cormorant Garamond", Georgia, "Times New Roman", serif;
  --cs-sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --cs-gutter: clamp(20px, 5vw, 88px);
  --cs-max: 1320px;
  --cs-ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}
[hidden] {
  display: none !important;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}
body {
  margin: 0;
  background: var(--cs-bg);
  color: var(--cs-ink);
  font: 400 16px/1.7 var(--cs-sans);
  -webkit-font-smoothing: antialiased;
  font-variant-numeric: lining-nums;
  text-rendering: optimizeLegibility;
}
img {
  display: block;
  max-width: 100%;
}
a {
  color: inherit;
}
:where(a, button, [tabindex]):focus-visible {
  outline: 2px solid var(--cs-blue);
  outline-offset: 4px;
  border-radius: 2px;
}
::selection {
  background: var(--cs-gold);
  color: var(--cs-bg);
}

.cs-skip {
  position: absolute;
  left: 12px;
  top: -60px;
  z-index: 100;
  padding: 10px 16px;
  background: var(--cs-ink);
  color: var(--cs-bg);
  text-decoration: none;
}
.cs-skip:focus {
  top: 12px;
}

.cs-wrap {
  width: min(100% - var(--cs-gutter) * 2, var(--cs-max));
  margin-inline: auto;
}

/* ── Tipografi ── */
.cs-eyebrow {
  margin: 0;
  font: 500 12px/1.4 var(--cs-sans);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cs-gold);
}
.cs-display {
  margin: 0;
  font-family: var(--cs-serif);
  font-weight: 300;
  line-height: 0.98;
  letter-spacing: -0.015em;
}
.cs-display em {
  font-style: italic;
  color: var(--cs-gold);
}
.cs-h3 {
  margin: 0 0 14px;
  font: 400 clamp(26px, 2.6vw, 36px)/1.1 var(--cs-serif);
  letter-spacing: -0.005em;
}
.cs-lead {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(17px, 1.4vw, 19px);
  line-height: 1.75;
  color: var(--cs-muted);
}
.cs-text {
  margin: 0;
  color: var(--cs-muted);
}
.cs-small {
  font-size: 14px;
  color: var(--cs-muted);
}
.cs-label {
  display: block;
  margin-bottom: 10px;
  font: 500 11px/1.4 var(--cs-sans);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cs-muted);
}

/* ── Bilah atas ── */
.cs-top {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px var(--cs-gutter);
  transition: background-color 0.5s var(--cs-ease), border-color 0.5s var(--cs-ease), padding 0.5s var(--cs-ease);
  border-bottom: 1px solid transparent;
}
.cs-top.is-solid {
  padding-block: 12px;
  background: rgba(10, 9, 8, 0.86);
  border-color: var(--cs-line);
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
}
.cs-brand {
  display: inline-flex;
  align-items: baseline;
  gap: 12px;
  text-decoration: none;
}
.cs-brand-name {
  font: 400 24px/1 var(--cs-serif);
  letter-spacing: 0.01em;
}
.cs-brand-tag {
  font: 500 10px/1 var(--cs-sans);
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--cs-gold);
}
.cs-back {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 0 20px;
  font: 500 12px/1 var(--cs-sans);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  text-decoration: none;
  border: 1px solid var(--cs-line-2);
  border-radius: 999px;
  transition: background-color 0.4s var(--cs-ease), color 0.4s var(--cs-ease);
}
.cs-back:hover {
  background: var(--cs-ink);
  color: var(--cs-bg);
}

/* ── Hero ── */
.cs-hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  align-items: end;
  overflow: hidden;
  isolation: isolate;
}
.cs-hero-media {
  position: absolute;
  inset: 0;
  z-index: -2;
}
.cs-hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.06);
  animation: cs-drift 22s var(--cs-ease) forwards;
  filter: saturate(0.85);
}
@keyframes cs-drift {
  to {
    transform: scale(1);
  }
}
.cs-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(180deg, rgba(10, 9, 8, 0.72) 0%, rgba(10, 9, 8, 0.2) 34%, rgba(10, 9, 8, 0.55) 62%, var(--cs-bg) 100%),
    radial-gradient(120% 80% at 20% 100%, rgba(10, 9, 8, 0.9), transparent 60%);
}
.cs-hero-inner {
  padding: 160px 0 clamp(56px, 8vh, 96px);
}
.cs-hero-title {
  margin-top: 22px;
  font-size: clamp(56px, 10.5vw, 168px);
  max-width: 12ch;
}
.cs-hero-sub {
  margin: 28px 0 0;
  max-width: 50ch;
  font: 300 clamp(18px, 1.7vw, 23px)/1.6 var(--cs-sans);
  color: var(--cs-ink);
}
.cs-meta {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  margin: clamp(48px, 7vh, 80px) 0 0;
  padding: 0;
  border-top: 1px solid var(--cs-line-2);
}
.cs-meta div {
  padding: 22px 24px 0 0;
}
.cs-meta dt {
  font: 500 11px/1.4 var(--cs-sans);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cs-gold);
}
.cs-meta dd {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.55;
  color: var(--cs-ink);
}

/* ── Angka besar ── */
.cs-facts {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border-block: 1px solid var(--cs-line);
}
.cs-fact {
  padding: clamp(28px, 4vw, 48px) 0 clamp(28px, 4vw, 44px);
  text-align: center;
  border-left: 1px solid var(--cs-line);
}
.cs-fact:first-child {
  border-left: 0;
}
.cs-fact strong {
  display: block;
  font: 300 clamp(44px, 5.6vw, 84px)/1 var(--cs-serif);
  color: var(--cs-gold);
  font-variant-numeric: lining-nums;
}
.cs-fact span {
  display: block;
  margin-top: 10px;
  font: 500 11px/1.4 var(--cs-sans);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cs-muted);
}

/* ── Navigasi bab ── */
.cs-chapters {
  position: sticky;
  top: 69px;
  z-index: 40;
  background: rgba(10, 9, 8, 0.9);
  border-bottom: 1px solid var(--cs-line);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}
.cs-chapters ol {
  display: flex;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}
.cs-chapters ol::-webkit-scrollbar {
  display: none;
}
.cs-chapters a {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  min-height: 52px;
  padding: 16px 18px 14px;
  white-space: nowrap;
  font-size: 14px;
  color: var(--cs-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.3s var(--cs-ease), border-color 0.3s var(--cs-ease);
}
.cs-chapters a span {
  font: 400 15px/1 var(--cs-serif);
  color: var(--cs-gold);
}
.cs-chapters a:hover,
.cs-chapters a.is-on {
  color: var(--cs-ink);
  border-color: var(--cs-gold);
}

/* ── Bab ── */
.cs-chapter {
  padding: clamp(96px, 12vw, 180px) 0 0;
}
.cs-chapter-head {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(32px, 6vw, 96px);
  align-items: end;
  padding-bottom: clamp(48px, 6vw, 80px);
  border-bottom: 1px solid var(--cs-line);
}
.cs-chapter-no {
  display: block;
  font: 300 clamp(96px, 14vw, 220px)/0.8 var(--cs-serif);
  color: transparent;
  -webkit-text-stroke: 1px var(--cs-gold);
}
.cs-chapter-title {
  margin-top: 18px;
  font-size: clamp(44px, 6vw, 92px);
}
.cs-block {
  display: grid;
  grid-template-columns: minmax(180px, 0.32fr) minmax(0, 1fr);
  gap: clamp(24px, 5vw, 80px);
  padding: clamp(56px, 7vw, 104px) 0;
  border-bottom: 1px solid var(--cs-line);
}
.cs-block:last-child {
  border-bottom: 0;
}
.cs-block.is-wide {
  grid-template-columns: minmax(0, 1fr);
}
.cs-block.is-wide .cs-block-label {
  position: static;
  max-width: 560px;
}
.cs-block-label {
  position: sticky;
  top: 150px;
  align-self: start;
}
.cs-block-label p {
  margin: 14px 0 0;
  font-size: 14px;
  color: var(--cs-muted);
}
.cs-block-index {
  font: 400 15px/1 var(--cs-serif);
  color: var(--cs-gold);
}

/* ── Pernyataan masalah ── */
.cs-statement {
  margin: 0;
  font: 300 clamp(30px, 3.6vw, 54px)/1.18 var(--cs-serif);
  letter-spacing: -0.01em;
}
.cs-statement em {
  font-style: italic;
  color: var(--cs-gold);
}
.cs-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(40px, 5vw, 64px);
  background: var(--cs-line);
  border: 1px solid var(--cs-line);
}
.cs-cards.is-two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.cs-cards.is-four {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}
.cs-card {
  padding: clamp(24px, 3vw, 40px);
  background: var(--cs-bg);
}
.cs-card-no {
  display: block;
  margin-bottom: 26px;
  font: 400 15px/1 var(--cs-serif);
  color: var(--cs-gold);
}
.cs-card h4 {
  margin: 0 0 10px;
  font: 400 24px/1.2 var(--cs-serif);
}
.cs-card p {
  margin: 0;
  font-size: 15px;
  color: var(--cs-muted);
}
.cs-kpi {
  display: block;
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px solid var(--cs-line);
  font: 500 12px/1.5 var(--cs-sans);
  letter-spacing: 0.06em;
  color: var(--cs-blue);
}

/* ── Persona ── */
.cs-persona-head {
  position: relative;
  display: flex;
  align-items: flex-end;
  gap: 22px;
  min-height: 200px;
  padding: 28px;
  overflow: hidden;
  background:
    radial-gradient(90% 120% at 100% 0%, rgba(212, 193, 154, 0.16), transparent 60%),
    linear-gradient(160deg, #1d1a16, #11100e 70%);
  border-bottom: 1px solid var(--cs-line);
}
.cs-monogram {
  position: absolute;
  right: 18px;
  top: -34px;
  font: italic 300 220px/1 var(--cs-serif);
  color: transparent;
  -webkit-text-stroke: 1px rgba(212, 193, 154, 0.35);
  pointer-events: none;
}
.cs-persona-head .cs-persona-name {
  position: relative;
  left: auto;
  bottom: auto;
}
.cs-personas {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 36px);
}
.cs-persona {
  display: grid;
  grid-template-rows: auto 1fr;
  background: var(--cs-bg-2);
  border: 1px solid var(--cs-line);
}
.cs-persona-photo {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
}
.cs-persona-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(0.35) contrast(1.02);
}
.cs-persona-photo::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 45%, rgba(17, 16, 14, 0.95));
}
.cs-persona-name {
  position: absolute;
  left: 28px;
  bottom: 22px;
  z-index: 1;
}
.cs-persona-name strong {
  display: block;
  font: 400 34px/1 var(--cs-serif);
}
.cs-persona-name span {
  display: block;
  margin-top: 8px;
  font-size: 14px;
  color: var(--cs-muted);
}
.cs-persona-body {
  display: grid;
  gap: 22px;
  padding: 26px 28px 32px;
}
.cs-persona-body blockquote {
  margin: 0;
  font: italic 300 22px/1.4 var(--cs-serif);
  color: var(--cs-ink);
}
.cs-list {
  margin: 0;
  padding: 0;
  list-style: none;
}
.cs-list li {
  position: relative;
  padding: 9px 0 9px 22px;
  font-size: 15px;
  color: var(--cs-muted);
  border-top: 1px solid var(--cs-line);
}
.cs-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 19px;
  width: 8px;
  height: 1px;
  background: var(--cs-gold);
}
.cs-list strong {
  color: var(--cs-ink);
  font-weight: 500;
}
.cs-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.cs-tag {
  padding: 6px 12px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--cs-ink);
  border: 1px solid var(--cs-line-2);
  border-radius: 999px;
}

/* ── Empathy map ── */
.cs-empathy {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--cs-line);
  border: 1px solid var(--cs-line);
}
.cs-empathy > div {
  padding: clamp(24px, 3vw, 40px);
  background: var(--cs-bg);
}
.cs-empathy h4 {
  margin: 0 0 14px;
  font: 500 11px/1.4 var(--cs-sans);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cs-gold);
}
.cs-empathy > div:nth-child(odd) {
  padding-right: 88px;
}
.cs-empathy > div:nth-child(even) {
  padding-left: 88px;
}
.cs-empathy p {
  margin: 0 0 10px;
  font: 300 20px/1.45 var(--cs-serif);
}
.cs-empathy-core {
  position: absolute;
  left: 50%;
  top: 50%;
  display: grid;
  place-items: center;
  width: 132px;
  height: 132px;
  margin: -66px 0 0 -66px;
  text-align: center;
  font: 400 18px/1.15 var(--cs-serif);
  background: var(--cs-bg-3);
  border: 1px solid var(--cs-gold);
  border-radius: 50%;
}
.cs-gains {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 40px);
  margin-top: clamp(28px, 3vw, 40px);
}

/* ── Journey map ── */
.cs-scroll {
  overflow-x: auto;
  scrollbar-color: var(--cs-line-2) transparent;
}
.cs-journey {
  width: 100%;
  min-width: 980px;
  border-collapse: collapse;
  table-layout: fixed;
}
.cs-journey th,
.cs-journey td {
  padding: 18px 16px;
  vertical-align: top;
  text-align: left;
  font-size: 14px;
  line-height: 1.55;
  border-top: 1px solid var(--cs-line);
}
.cs-journey thead th {
  padding-top: 0;
  border-top: 0;
  font: 400 24px/1.1 var(--cs-serif);
  color: var(--cs-ink);
}
.cs-journey thead th small {
  display: block;
  margin-bottom: 10px;
  font: 500 11px/1 var(--cs-sans);
  letter-spacing: 0.2em;
  color: var(--cs-gold);
}
.cs-journey tbody th {
  width: 150px;
  font: 500 11px/1.5 var(--cs-sans);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cs-gold);
}
.cs-journey td {
  color: var(--cs-muted);
}
.cs-journey .cs-emotion td {
  padding: 0;
}
.cs-curve {
  display: block;
  width: 100%;
  height: 130px;
}
.cs-journey .cs-solve td {
  color: var(--cs-ink);
}

/* ── Sitemap ── */
.cs-tree {
  display: grid;
  gap: 28px;
}
.cs-node {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 18px;
  background: var(--cs-bg-2);
  border: 1px solid var(--cs-line-2);
}
.cs-node strong {
  font: 400 20px/1.15 var(--cs-serif);
}
.cs-node code,
.cs-code {
  font: 400 12px/1.4 ui-monospace, "SF Mono", Menlo, monospace;
  color: var(--cs-blue);
}
.cs-node.is-root {
  border-color: var(--cs-gold);
}
.cs-tree-row {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  padding-top: 28px;
}
.cs-tree-row::before {
  content: "";
  position: absolute;
  top: 0;
  left: 16.6%;
  right: 16.6%;
  height: 1px;
  background: var(--cs-line-2);
}
.cs-tree-col {
  position: relative;
  display: grid;
  align-content: start;
  gap: 10px;
}
.cs-tree-col::before {
  content: "";
  position: absolute;
  top: -28px;
  left: 50%;
  width: 1px;
  height: 28px;
  background: var(--cs-line-2);
}
.cs-tree-col > .cs-node {
  text-align: center;
}
.cs-tree-col ul {
  margin: 0;
  padding: 0 0 0 18px;
  list-style: none;
  border-left: 1px solid var(--cs-line);
}
.cs-tree-col li {
  padding: 8px 0 8px 14px;
  font-size: 14px;
  color: var(--cs-muted);
}
.cs-tree-col li strong {
  color: var(--cs-ink);
  font-weight: 500;
}
.cs-tree-top {
  display: flex;
  justify-content: center;
}

/* ── User flow ── */
.cs-flow {
  display: grid;
  gap: 0;
  counter-reset: flow;
}
.cs-step {
  position: relative;
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr) minmax(0, 0.9fr);
  gap: 24px;
  padding: 22px 0;
  border-top: 1px solid var(--cs-line);
}
.cs-step::before {
  counter-increment: flow;
  content: counter(flow, decimal-leading-zero);
  font: 300 34px/1 var(--cs-serif);
  color: var(--cs-gold);
}
.cs-step h4 {
  margin: 0 0 6px;
  font: 400 22px/1.2 var(--cs-serif);
}
.cs-step p {
  margin: 0;
  font-size: 15px;
  color: var(--cs-muted);
}
.cs-step-why {
  font-size: 14px;
  color: var(--cs-muted);
  padding-left: 20px;
  border-left: 1px solid var(--cs-line-2);
}
.cs-step-why strong {
  display: block;
  margin-bottom: 4px;
  font: 500 11px/1.4 var(--cs-sans);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cs-blue);
}
.cs-step.is-decision h4::before {
  content: "◇ ";
  color: var(--cs-gold);
}
.cs-branch {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 12px;
}
.cs-branch span {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--cs-ink);
  background: var(--cs-bg-2);
  border: 1px solid var(--cs-line);
}
.cs-branch b {
  color: var(--cs-gold);
  font-weight: 500;
}

/* ── Bagian terang: design system ── */
.cs-ivory {
  margin-top: clamp(56px, 7vw, 104px);
  padding: clamp(48px, 6vw, 88px) clamp(20px, 4vw, 64px);
  color: var(--cs-paper-ink);
  background: var(--cs-paper);
}
.cs-ivory .cs-label,
.cs-ivory .cs-text,
.cs-ivory .cs-small {
  color: var(--cs-paper-muted);
}
.cs-ivory .cs-h3 {
  color: var(--cs-paper-ink);
}
.cs-ivory-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
  margin: 26px 0 56px;
}
.cs-swatch {
  display: grid;
  gap: 4px;
  font-size: 13px;
  color: var(--cs-paper-muted);
}
.cs-swatch i {
  display: block;
  aspect-ratio: 1 / 1.1;
  margin-bottom: 10px;
  border: 1px solid rgba(21, 19, 15, 0.12);
}
.cs-swatch strong {
  color: var(--cs-paper-ink);
  font-weight: 500;
}
.cs-swatch code {
  font: 400 12px/1.4 ui-monospace, "SF Mono", Menlo, monospace;
  color: var(--cs-paper-ink);
}
.cs-ratio {
  display: inline-block;
  margin-top: 2px;
  font-size: 12px;
  font-weight: 500;
  color: var(--cs-paper-blue);
}
.cs-typescale {
  border-top: 1px solid rgba(21, 19, 15, 0.14);
}
.cs-type {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 24px;
  align-items: baseline;
  padding: 18px 0;
  border-bottom: 1px solid rgba(21, 19, 15, 0.14);
}
.cs-type span {
  font-size: 12px;
  line-height: 1.5;
  color: var(--cs-paper-muted);
}
.cs-type span b {
  display: block;
  color: var(--cs-paper-ink);
  font-weight: 500;
}
.cs-type p {
  margin: 0;
  overflow-wrap: anywhere;
}
.cs-tokens {
  width: 100%;
  margin-top: 26px;
  border-collapse: collapse;
  font-size: 14px;
}
.cs-tokens th,
.cs-tokens td {
  padding: 12px 10px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid rgba(21, 19, 15, 0.14);
}
.cs-tokens th {
  font: 500 11px/1.4 var(--cs-sans);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cs-paper-muted);
}
.cs-tokens code {
  font: 400 12.5px/1.4 ui-monospace, "SF Mono", Menlo, monospace;
  color: var(--cs-paper-blue);
}
.cs-tokens td:last-child {
  color: var(--cs-paper-muted);
}
.cs-components {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 26px;
}
.cs-component {
  display: grid;
  gap: 18px;
  align-content: start;
  padding: 24px;
  background: #fbf9f4;
  border: 1px solid rgba(21, 19, 15, 0.1);
}
.cs-component-stage {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  min-height: 72px;
}
.cs-component h4 {
  margin: 0;
  font: 400 20px/1.2 var(--cs-serif);
}
.cs-component p {
  margin: 0;
  font-size: 13.5px;
  color: var(--cs-paper-muted);
}

/* Replika komponen portofolio (tampilan aslinya) */
.pf-like-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 26px;
  font: 400 13px/1 "Jost", var(--cs-sans);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cs-paper-ink);
  background: transparent;
  border: 1px solid var(--cs-paper-ink);
  border-radius: 999px;
  cursor: pointer;
  transition: background-color 0.4s var(--cs-ease), color 0.4s var(--cs-ease), transform 0.2s var(--cs-ease);
}
.pf-like-btn.is-solid,
.pf-like-btn:hover {
  color: var(--cs-paper);
  background: var(--cs-paper-ink);
}
.pf-like-btn.is-wa {
  color: #fff;
  background: #0141a3;
  border-color: #0141a3;
}
.pf-like-btn.is-wa:hover {
  background: #00317d;
}
.pf-like-btn:active {
  transform: scale(0.98);
}
.pf-like-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 44px;
  padding: 0 16px;
  font: 400 14px/1 "Jost", var(--cs-sans);
  color: var(--cs-paper-ink);
  background: transparent;
  border: 1px solid rgba(21, 19, 15, 0.2);
  border-radius: 999px;
  cursor: pointer;
}
.pf-like-chip sup {
  font-size: 10px;
  color: var(--cs-paper-blue);
}
.pf-like-chip.is-on {
  color: var(--cs-paper);
  background: var(--cs-paper-ink);
  border-color: var(--cs-paper-ink);
}
.pf-like-chip.is-on sup {
  color: #9cc1ff;
}
.pf-like-rating {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  font-size: 13px;
  color: var(--cs-paper-ink);
  background: #fff;
  border: 1px solid rgba(21, 19, 15, 0.12);
  border-radius: 999px;
}
.pf-like-rating b {
  color: #b8860b;
  letter-spacing: 0.08em;
}
.pf-like-card {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: #ebe5d9;
}
.pf-like-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 1.4s var(--cs-ease);
}
.pf-like-card:hover img {
  transform: scale(1.06);
}
.pf-like-card span {
  position: absolute;
  left: 14px;
  bottom: 12px;
  font: 400 20px/1 var(--cs-serif);
  color: #fff;
  text-shadow: 0 1px 12px rgba(0, 0, 0, 0.5);
}

/* ── Layar hi-fi ── */
.cs-screens {
  display: grid;
  gap: clamp(64px, 8vw, 120px);
}
.cs-screen {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
  gap: clamp(28px, 4vw, 64px);
  align-items: center;
}
.cs-screen:nth-child(even) {
  grid-template-columns: minmax(0, 0.65fr) minmax(0, 1.35fr);
}
.cs-screen:nth-child(even) .cs-devices {
  order: 2;
}
.cs-devices {
  position: relative;
  padding-bottom: 8%;
}
.cs-laptop {
  padding: 10px 10px 0;
  background: linear-gradient(180deg, #2a2723, #191714);
  border: 1px solid var(--cs-line-2);
  border-radius: 14px 14px 4px 4px;
  box-shadow: 0 40px 90px rgba(0, 0, 0, 0.6);
}
.cs-laptop img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  object-position: top;
  border-radius: 4px 4px 0 0;
}
.cs-laptop::after {
  content: "";
  display: block;
  height: 14px;
  margin: 0 -40px;
  background: linear-gradient(180deg, #34302b, #1d1b18);
  border-radius: 0 0 14px 14px;
}
.cs-phone {
  position: absolute;
  right: -2%;
  bottom: 0;
  width: 25%;
  padding: 6px;
  background: #0d0c0b;
  border: 1px solid var(--cs-line-2);
  border-radius: 28px;
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.7);
}
.cs-phone img {
  width: 100%;
  height: auto;
  aspect-ratio: 390 / 844;
  object-fit: cover;
  object-position: top;
  border-radius: 22px;
}
.cs-screen-copy .cs-h3 {
  margin-top: 14px;
}
.cs-screen-copy .cs-list {
  margin-top: 22px;
}

/* ── State design ── */
.cs-states-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 22px;
}
.cs-state-tab {
  min-height: 44px;
  padding: 0 18px;
  font: 500 12px/1 var(--cs-sans);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cs-muted);
  background: transparent;
  border: 1px solid var(--cs-line-2);
  border-radius: 999px;
  cursor: pointer;
  transition: color 0.3s var(--cs-ease), background-color 0.3s var(--cs-ease);
}
.cs-state-tab:hover {
  color: var(--cs-ink);
}
.cs-state-tab[aria-selected="true"] {
  color: var(--cs-bg);
  background: var(--cs-ink);
  border-color: var(--cs-ink);
}
.cs-state-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.8fr);
  gap: clamp(24px, 4vw, 56px);
  align-items: center;
}
.cs-state-stage {
  display: grid;
  place-items: center;
  min-height: 300px;
  padding: 32px;
  color: var(--cs-paper-ink);
  background: var(--cs-paper);
}
.cs-state-copy h4 {
  margin: 0 0 10px;
  font: 400 28px/1.15 var(--cs-serif);
}
.cs-state-copy p {
  margin: 0 0 12px;
  color: var(--cs-muted);
}
.cs-state-copy .cs-code {
  display: block;
  margin-top: 14px;
}
.demo-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}
.demo-skel {
  display: grid;
  grid-template-columns: repeat(3, 120px);
  gap: 10px;
}
.demo-skel i {
  display: block;
  height: 150px;
  background: linear-gradient(110deg, #e6dfd1 30%, #f1ece2 50%, #e6dfd1 70%) 0 0 / 300% 100%;
  animation: cs-shimmer 1.6s linear infinite;
}
.demo-skel i.is-blur {
  background: url("/assets/case-study/lqip.jpg") center / cover;
  filter: blur(10px);
  animation: none;
}
@keyframes cs-shimmer {
  to {
    background-position: -300% 0;
  }
}
.demo-loader {
  width: 34px;
  height: 34px;
  border: 1px solid rgba(21, 19, 15, 0.18);
  border-top-color: var(--cs-paper-ink);
  border-radius: 50%;
  animation: cs-spin 1s linear infinite;
}
@keyframes cs-spin {
  to {
    transform: rotate(360deg);
  }
}
.demo-state {
  display: grid;
  justify-items: center;
  gap: 12px;
  max-width: 360px;
  text-align: center;
}
.demo-state h5 {
  margin: 0;
  font: 300 34px/1.05 var(--cs-serif);
}
.demo-state p {
  margin: 0;
  font-size: 14px;
  color: var(--cs-paper-muted);
}

/* ── Metrik ── */
.cs-gauges {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--cs-line);
  border: 1px solid var(--cs-line);
}
.cs-gauge {
  display: grid;
  gap: 14px;
  justify-items: start;
  align-content: start;
  padding: clamp(24px, 3vw, 40px);
  background: var(--cs-bg);
}
.cs-ring {
  position: relative;
  width: 148px;
  height: 148px;
}
.cs-ring svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}
.cs-ring circle {
  fill: none;
  stroke-width: 2;
}
.cs-ring .track {
  stroke: var(--cs-line-2);
}
.cs-ring .bar {
  stroke: var(--cs-gold);
  stroke-linecap: round;
  stroke-dasharray: 289;
  stroke-dashoffset: 289;
  transition: stroke-dashoffset 1.8s var(--cs-ease);
}
.cs-ring strong {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font: 300 40px/1 var(--cs-serif);
}
.cs-gauge h4 {
  margin: 0;
  font: 400 24px/1.15 var(--cs-serif);
}
.cs-gauge p {
  margin: 0;
  font-size: 14px;
  color: var(--cs-muted);
}
.cs-badge {
  display: inline-block;
  padding: 5px 10px;
  font: 500 10.5px/1 var(--cs-sans);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cs-bg);
  background: var(--cs-gold);
  border-radius: 999px;
}
.cs-badge.is-live {
  background: var(--cs-blue);
}
.cs-badge.is-plan {
  color: var(--cs-ink);
  background: transparent;
  border: 1px solid var(--cs-line-2);
}
.cs-perf {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--cs-line);
  border: 1px solid var(--cs-line);
}
.cs-perf div {
  padding: 26px 24px;
  background: var(--cs-bg);
}
.cs-perf strong {
  display: block;
  font: 300 clamp(38px, 4vw, 56px)/1 var(--cs-serif);
  color: var(--cs-gold);
}
.cs-perf span {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  color: var(--cs-muted);
}
.cs-perf b {
  color: var(--cs-ink);
  font-weight: 500;
}
.cs-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.cs-table th,
.cs-table td {
  padding: 14px 12px 14px 0;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--cs-line);
}
.cs-table th {
  font: 500 11px/1.4 var(--cs-sans);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cs-gold);
}
.cs-table td {
  color: var(--cs-muted);
}
.cs-table td:first-child {
  color: var(--cs-ink);
}
.cs-pass {
  color: var(--cs-blue);
  font-weight: 500;
}
.cs-dot {
  display: inline-block;
  width: 12px;
  height: 12px;
  margin-right: 8px;
  vertical-align: -1px;
  border: 1px solid var(--cs-line-2);
  border-radius: 50%;
}
.cs-note {
  margin-top: 26px;
  padding: 18px 22px;
  font-size: 14px;
  color: var(--cs-muted);
  border-left: 1px solid var(--cs-gold);
  background: var(--cs-bg-2);
}
.cs-note strong {
  color: var(--cs-ink);
  font-weight: 500;
}

/* ── Penutup ── */
.cs-outro {
  margin-top: clamp(96px, 12vw, 180px);
  padding: clamp(96px, 12vw, 160px) 0;
  text-align: center;
  background:
    radial-gradient(60% 80% at 50% 0%, rgba(212, 193, 154, 0.1), transparent 70%),
    var(--cs-bg-2);
  border-top: 1px solid var(--cs-line);
}
.cs-outro-title {
  margin: 22px auto 0;
  max-width: 14ch;
  font-size: clamp(48px, 7vw, 112px);
}
.cs-outro .cs-lead {
  margin: 28px auto 0;
}
.cs-outro-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 44px;
}
.cs-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 30px;
  font: 500 12px/1 var(--cs-sans);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--cs-bg);
  background: var(--cs-ink);
  border: 1px solid var(--cs-ink);
  border-radius: 999px;
  transition: background-color 0.4s var(--cs-ease), color 0.4s var(--cs-ease);
}
.cs-cta:hover {
  background: var(--cs-gold);
  border-color: var(--cs-gold);
}
.cs-cta.is-ghost {
  color: var(--cs-ink);
  background: transparent;
  border-color: var(--cs-line-2);
}
.cs-cta.is-ghost:hover {
  color: var(--cs-bg);
  background: var(--cs-ink);
}
.cs-glossary {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0 40px;
  margin: 0;
}
.cs-glossary div {
  padding: 16px 0;
  border-top: 1px solid var(--cs-line);
}
.cs-glossary dt {
  font: 400 19px/1.3 var(--cs-serif);
}
.cs-glossary dd {
  margin: 4px 0 0;
  font-size: 14px;
  color: var(--cs-muted);
}
.cs-foot {
  padding: 40px 0 56px;
  font-size: 13px;
  color: var(--cs-muted);
  border-top: 1px solid var(--cs-line);
}
.cs-foot .cs-wrap {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
}

/* ── Muncul saat digulir ── */
.cs-reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 1.1s var(--cs-ease), transform 1.1s var(--cs-ease);
}
.cs-reveal.is-in {
  opacity: 1;
  transform: none;
}

/* ── Responsif ── */
@media (max-width: 1100px) {
  .cs-cards.is-four,
  .cs-components {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .cs-ivory-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .cs-perf {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .cs-glossary {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (max-width: 900px) {
  .cs-chapter-head,
  .cs-block,
  .cs-screen,
  .cs-screen:nth-child(even),
  .cs-state-panel {
    grid-template-columns: minmax(0, 1fr);
  }
  .cs-screen:nth-child(even) .cs-devices {
    order: 0;
  }
  .cs-block-label {
    position: static;
  }
  .cs-cards,
  .cs-personas,
  .cs-gauges,
  .cs-gains {
    grid-template-columns: minmax(0, 1fr);
  }
  .cs-meta {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .cs-facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .cs-fact:nth-child(4) {
    border-left: 0;
  }
  .cs-fact:nth-child(n + 4) {
    border-top: 1px solid var(--cs-line);
  }
  .cs-step {
    grid-template-columns: 48px minmax(0, 1fr);
  }
  .cs-step-why {
    grid-column: 2;
  }
  .cs-tree-row {
    grid-template-columns: minmax(0, 1fr);
    padding-top: 0;
  }
  .cs-tree-row::before,
  .cs-tree-col::before {
    display: none;
  }
}
@media (max-width: 640px) {
  .cs-brand-tag {
    display: none;
  }
  .cs-back {
    padding: 0 16px;
    font-size: 11px;
  }
  .cs-chapters {
    top: 67px;
  }
  .cs-cards.is-two,
  .cs-cards.is-four,
  .cs-components,
  .cs-empathy,
  .cs-perf,
  .cs-glossary {
    grid-template-columns: minmax(0, 1fr);
  }
  .cs-empathy > div:nth-child(n) {
    padding: 22px;
  }
  .cs-empathy-core {
    position: static;
    width: auto;
    height: auto;
    margin: 0;
    padding: 18px;
    border-radius: 0;
    order: -1;
  }
  .cs-ivory-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .cs-type {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
  }
  .cs-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .cs-fact:nth-child(n) {
    border-left: 1px solid var(--cs-line);
    border-top: 1px solid var(--cs-line);
  }
  .cs-fact:nth-child(odd) {
    border-left: 0;
  }
  .cs-fact:nth-child(-n + 2) {
    border-top: 0;
  }
  .cs-fact:last-child {
    grid-column: 1 / -1;
    border-left: 0;
  }
  .cs-phone {
    width: 30%;
  }
  .demo-skel {
    grid-template-columns: repeat(3, 84px);
  }
  .demo-skel i {
    height: 110px;
  }
  .cs-tokens {
    font-size: 13px;
  }
  .cs-tokens td:last-child,
  .cs-tokens th:last-child {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .cs-reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .cs-hero-media img,
  .demo-skel i,
  .demo-loader {
    animation: none;
    transform: none;
  }
  .cs-ring .bar {
    transition: none;
  }
}