:root {
  --interaction-bg: #10100f;
  --interaction-white: #fffdfa;
  --interaction-muted: rgba(255, 253, 250, .52);
  --interaction-soft: rgba(255, 253, 250, .72);
  --interaction-line: rgba(255, 253, 250, .16);
  --interaction-orange: #ff6a1f;
  --interaction-frame: 1440px;
  --interaction-gutter: clamp(1.2rem, 4vw, 3.5rem);
  --interaction-serif: "Times New Roman", "Songti SC", "SimSun", serif;
  --interaction-sans: "Times New Roman", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
}

* { box-sizing: border-box; }

html {
  min-width: 320px;
  background: var(--interaction-bg);
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 82% 16%, rgba(255, 106, 31, .055), transparent 28rem),
    linear-gradient(180deg, #12110f 0%, #10100f 48%, #0c0c0b 100%);
  color: var(--interaction-white);
  font-family: var(--interaction-sans);
  text-rendering: optimizeLegibility;
}

::selection { background: var(--interaction-orange); color: #080808; }
a { color: inherit; text-decoration: none; }
button { color: inherit; font: inherit; }
img { max-width: 100%; }

a:focus-visible,
button:focus-visible,
.interaction-carousel:focus-visible {
  outline: 2px solid var(--interaction-orange);
  outline-offset: 6px;
}

.interaction-skip {
  position: fixed;
  z-index: 30;
  top: 1rem;
  left: 1rem;
  padding: .75rem 1rem;
  background: var(--interaction-white);
  color: var(--interaction-bg);
  font-size: .8rem;
  transform: translateY(-180%);
  transition: transform .2s ease;
}

.interaction-skip:focus { transform: translateY(0); }

.interaction-header {
  position: fixed;
  z-index: 20;
  top: 0;
  right: 0;
  left: 0;
  display: flex;
  width: min(calc(100% - (var(--interaction-gutter) * 2)), var(--interaction-frame));
  min-height: 4.75rem;
  align-items: center;
  justify-content: space-between;
  margin: 0 auto;
  border-bottom: 1px solid var(--interaction-line);
  background: rgba(16, 16, 15, .82);
  backdrop-filter: blur(16px);
}

.interaction-brand {
  font-size: clamp(1.35rem, 1.8vw, 1.75rem);
  font-weight: 700;
  letter-spacing: -.1em;
  line-height: 1;
}

.interaction-brand sup {
  margin-left: .15rem;
  font-family: var(--interaction-serif);
  font-size: .42em;
  font-weight: 400;
  letter-spacing: 0;
  vertical-align: top;
}

.interaction-back {
  color: var(--interaction-muted);
  font-family: var(--interaction-serif);
  font-size: .72rem;
  letter-spacing: .06em;
  transition: color .25s ease;
}

.interaction-back span { color: var(--interaction-orange); }
.interaction-back:hover { color: var(--interaction-white); }

.interaction-main {
  width: min(100%, var(--interaction-frame));
  margin: 0 auto;
  padding: clamp(6rem, 8vw, 8rem) var(--interaction-gutter) clamp(5rem, 9vw, 8rem);
}

.interaction-hero { padding: clamp(1rem, 2vw, 2rem) 0 clamp(4rem, 8vw, 7rem); }

.interaction-hero-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--interaction-line);
}

.interaction-eyebrow,
.interaction-period,
.interaction-series,
.interaction-section-label,
.card-eyebrow,
.interaction-count,
.interaction-footer,
.interaction-hero-visual figcaption {
  font-family: var(--interaction-serif);
  letter-spacing: .12em;
  text-transform: uppercase;
}

.interaction-eyebrow,
.interaction-period,
.interaction-series {
  margin: 0;
  color: var(--interaction-muted);
  font-size: .67rem;
}

.interaction-hero-layout {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: clamp(5.5rem, 10vw, 9rem) 0 clamp(1rem, 2vw, 2rem);
  text-align: center;
}

.interaction-hero-copy { display: flex; width: 100%; min-width: 0; justify-content: center; }

.interaction-hero h1 {
  margin: 0;
  font-size: clamp(4.4rem, 8vw, 8.2rem);
  font-weight: 300;
  letter-spacing: -.1em;
  line-height: .82;
  text-align: center;
}

.interaction-hero h1 span,
.interaction-hero h1 em { display: block; }
.interaction-hero h1 em { color: var(--interaction-orange); font-style: normal; }

.interaction-hero-note {
  display: flex;
  width: 100%;
  flex-direction: column;
  align-items: center;
  gap: clamp(2.5rem, 4vw, 3.75rem);
  margin-top: clamp(3rem, 5vw, 4.5rem);
}

.interaction-description {
  max-width: 40rem;
  margin: 0;
  color: var(--interaction-muted);
  font-family: var(--interaction-sans);
  font-size: clamp(.95rem, 1.25vw, 1.1rem);
  line-height: 1.85;
}

.interaction-project-meta {
  display: grid;
  width: min(100%, 38rem);
  grid-template-columns: repeat(2, minmax(0, 1fr));
  font-family: var(--interaction-serif);
  text-align: left;
}

.interaction-project-meta > span { display: grid; gap: .65rem; padding: 0 clamp(1.5rem, 4vw, 3.5rem); }
.interaction-project-meta > span + span { border-left: 1px solid var(--interaction-line); }
.interaction-project-meta small { color: var(--interaction-muted); font-size: .63rem; font-weight: 400; letter-spacing: .12em; }
.interaction-project-meta strong { color: var(--interaction-white); font-size: .82rem; font-weight: 400; letter-spacing: .04em; }

.interaction-hero-visual {
  position: relative;
  width: min(100%, 1220px);
  margin: 0 auto;
  overflow: hidden;
  border: 1px solid var(--interaction-line);
  background: #080604;
}

.interaction-hero-visual img {
  display: block;
  width: 100%;
  aspect-ratio: 2.25 / 1;
  object-fit: cover;
  object-position: center;
  filter: saturate(.84) contrast(1.05);
}

.interaction-hero-visual::after {
  position: absolute;
  inset: 0;
  z-index: 2;
  background: linear-gradient(90deg, rgba(8, 6, 4, .08), transparent 48%, rgba(255, 106, 31, .08));
  content: "";
  pointer-events: none;
}

.interaction-hero-reveal {
  position: absolute;
  inset: 0 0 2.65rem;
  z-index: 3;
  display: grid;
  grid-template-columns: minmax(11rem, .7fr) minmax(0, 1.3fr);
  gap: 2rem;
  align-items: center;
  padding: clamp(2rem, 5vw, 4.5rem) clamp(1.5rem, 4vw, 4.5rem);
  opacity: 0;
  transition: opacity 240ms ease;
  pointer-events: none;
}

.interaction-hero-visual.is-door-open .interaction-hero-reveal { opacity: 1; }

.interaction-hero-reveal .interaction-section-label {
  align-self: end;
  margin: 0 0 .35rem;
}

.interaction-hero-reveal-copy {
  align-self: center;
  max-width: 34rem;
}

.interaction-hero-reveal-copy h2 {
  max-width: 15ch;
  margin: 0;
  color: var(--interaction-white);
  font-size: clamp(2.3rem, 4.4vw, 4.8rem);
  font-weight: 300;
  letter-spacing: -.075em;
  line-height: .92;
}

.interaction-hero-reveal-copy h2 em { color: var(--interaction-orange); font-style: normal; }

.interaction-hero-reveal-copy p {
  max-width: 24rem;
  margin: 1.5rem 0 0;
  color: var(--interaction-muted);
  font-size: .8rem;
  line-height: 1.8;
}

.interaction-door {
  position: absolute;
  inset: 0 0 2.65rem;
  z-index: 4;
  display: grid;
  grid-template-columns: 1fr 1fr;
  overflow: hidden;
  pointer-events: none;
  opacity: 1;
}

.interaction-door span {
  display: block;
  transform: translateX(0);
  transition: transform 760ms cubic-bezier(.72, .04, .25, 1);
}

.interaction-door--hero span:first-child {
  background: url("assets/project2-finance-operations.png") left center / 200% 100% no-repeat;
}

.interaction-door--hero span:last-child {
  background: url("assets/project2-finance-operations.png") right center / 200% 100% no-repeat;
}

.interaction-door.is-open { opacity: 1; }

.interaction-door.is-open span:first-child {
  transform: translateX(-100%);
}

.interaction-door.is-open span:last-child {
  transform: translateX(100%);
}

.interaction-hero-visual > img {
  opacity: 0;
}

.interaction-hero-visual.is-door-open > img,
.interaction-hero-visual.is-door-closed > img { opacity: 0; }

.interaction-hero-visual figcaption {
  position: relative;
  z-index: 5;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: .9rem 1rem 1rem;
  color: var(--interaction-muted);
  font-size: .6rem;
}

.interaction-work {
  scroll-margin-top: 5rem;
  margin-top: clamp(2rem, 4vw, 4rem);
}

.interaction-section-label {
  display: flex;
  align-items: center;
  gap: .7rem;
  margin: 0 0 .5rem;
  color: var(--interaction-muted);
  font-size: .67rem;
}

.interaction-section-label span {
  width: .42rem;
  height: .42rem;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--interaction-orange);
}

.interaction-showcase { position: relative; }

.interaction-carousel {
  position: relative;
  width: 100%;
  overflow: hidden;
  border-top: 1px solid var(--interaction-line);
  outline: none;
}

.interaction-track {
  display: flex;
  width: 100%;
  align-items: stretch;
  gap: 0;
  will-change: transform;
  transition-property: transform;
  transition-duration: 760ms;
  transition-timing-function: cubic-bezier(.22, .72, .18, 1);
}

.interaction-card {
  display: grid;
  flex: 0 0 100%;
  min-width: 0;
  min-height: clamp(27rem, 36vw, 34rem);
  grid-template-columns: minmax(0, 1.1fr) minmax(15rem, .9fr);
  gap: clamp(3rem, 8vw, 8rem);
  align-items: center;
  padding: clamp(3rem, 5.5vw, 5.5rem) clamp(.2rem, 1vw, 1rem);
  transform: rotate(-.15deg) scale(.99);
  transform-origin: center center;
  backface-visibility: hidden;
  transition: transform 760ms cubic-bezier(.22, .72, .18, 1), opacity 760ms ease;
}

.interaction-card.is-active { transform: rotate(0deg) scale(1); }

.card-art {
  position: relative;
  width: min(100%, 27rem);
  aspect-ratio: 1;
  justify-self: start;
  overflow: hidden;
  background: rgba(255, 253, 250, .035);
}

.card-art img { display: block; width: 100%; height: 100%; object-fit: contain; }

.interaction-card .card-art {
  background: #0c0c0c;
  border: 1px solid rgba(255, 253, 250, .12);
}

.interaction-card .card-art img {
  transform: scale(1.04);
}

.interaction-card .card-copy {
  display: flex;
  align-self: stretch;
  flex-direction: column;
  justify-content: center;
  max-width: none;
  padding: clamp(1.5rem, 3vw, 2.7rem);
  background: #d7d4ce;
  color: #242321;
}

.interaction-card .card-eyebrow,
.interaction-card .card-copy ul,
.interaction-card .card-copy footer {
  color: #5f5d58;
}

.interaction-card .card-copy h3,
.interaction-card .card-copy footer b {
  color: #242321;
}

.interaction-card .card-copy footer {
  border-top-color: rgba(36, 35, 33, .22);
}

.card-copy { width: 100%; max-width: 27rem; min-width: 0; }

.card-eyebrow {
  margin: 0 0 clamp(1.4rem, 2.4vw, 2.25rem);
  color: var(--interaction-muted);
  font-size: .67rem;
}

.card-eyebrow span { margin-right: .75rem; color: var(--interaction-orange); }

.card-copy h3 {
  margin: 0;
  font-size: clamp(2.7rem, 4vw, 4.1rem);
  font-weight: 300;
  letter-spacing: -.08em;
  line-height: .95;
}

.card-copy ul {
  display: grid;
  gap: .65rem;
  margin: clamp(1.8rem, 3vw, 2.8rem) 0 0;
  padding: 0;
  color: var(--interaction-muted);
  font-size: .9rem;
  line-height: 1.7;
  list-style: none;
}

.card-copy li { display: grid; grid-template-columns: 1.25rem 1fr; gap: .45rem; }
.card-copy li::before { color: var(--interaction-orange); content: "—"; }

.card-copy footer {
  display: flex;
  gap: 1.25rem;
  align-items: center;
  margin-top: clamp(2rem, 3.4vw, 3.25rem);
  padding-top: 1rem;
  border-top: 1px solid var(--interaction-line);
  color: var(--interaction-muted);
  font-family: var(--interaction-serif);
  font-size: .65rem;
  letter-spacing: .08em;
}

.card-copy footer b { color: var(--interaction-white); font-weight: 400; }

.interaction-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 1rem;
}

.interaction-guide { display: flex; align-items: center; gap: .25rem; }

.interaction-guide button {
  position: relative;
  display: grid;
  width: 44px;
  height: 44px;
  padding: 0;
  place-items: center;
  border: 0;
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
}

.interaction-guide button::before {
  width: .48rem;
  height: .48rem;
  border: 1px solid rgba(255, 253, 250, .5);
  border-radius: 50%;
  content: "";
  transition: background-color .25s ease, border-color .25s ease, transform .25s ease;
}

.interaction-guide button:hover::before { border-color: var(--interaction-white); }
.interaction-guide button.is-active::before { border-color: var(--interaction-orange); background: var(--interaction-orange); transform: scale(1.18); }

.interaction-count { margin: 0; color: var(--interaction-muted); font-size: .67rem; }
.interaction-count [data-current-slide] { color: var(--interaction-white); }

.interaction-footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: clamp(6rem, 10vw, 9rem);
  padding-top: 1.15rem;
  border-top: 1px solid var(--interaction-line);
  color: var(--interaction-muted);
  font-size: .6rem;
}

@media (max-width: 820px) {
  .interaction-hero-layout { padding-top: 5.5rem; }
  .interaction-hero-note { gap: 2.5rem; }
  .interaction-hero-visual img { aspect-ratio: 2 / 1; }
  .interaction-hero-reveal { grid-template-columns: 1fr; gap: 1rem; padding: 2rem 1.5rem; }
  .interaction-hero-reveal .interaction-section-label { align-self: start; }
  .interaction-hero-reveal-copy { align-self: center; }
  .interaction-card,
  .interaction-card--two { min-height: auto; grid-template-columns: 1fr; gap: 2.5rem; padding: 3.5rem 0 4rem; }
  .card-art { width: min(100%, 30rem); justify-self: center; }
  .interaction-card .card-copy { max-width: 34rem; justify-self: center; }
}

@media (max-width: 560px) {
  .interaction-header { min-height: 4.5rem; }
  .interaction-brand { font-size: 1.45rem; }
  .interaction-back { font-size: .67rem; }
  .interaction-main { padding-top: 6.5rem; }
  .interaction-hero { padding-bottom: 4rem; }
  .interaction-hero-topline { align-items: flex-start; }
  .interaction-eyebrow, .interaction-period, .interaction-series { font-size: .58rem; }
  .interaction-hero-layout { padding-top: 3.8rem; }
  .interaction-hero h1 { font-size: clamp(3.7rem, 17vw, 5.4rem); }
  .interaction-project-meta > span { padding: 0 1rem; }
  .interaction-hero-visual img { aspect-ratio: 1.35 / 1; }
  .interaction-hero-visual figcaption { flex-direction: column; gap: .45rem; font-size: .55rem; }
  .interaction-work { margin-top: 2.5rem; }
  .interaction-card, .interaction-card--two { gap: 2rem; padding: 2.8rem 0 3.25rem; }
  .card-art { width: min(100%, 25rem); }
  .card-copy h3 { font-size: clamp(2.6rem, 13vw, 3.5rem); }
  .card-copy ul { font-size: .88rem; }
  .card-copy footer { align-items: flex-start; flex-direction: column; gap: .5rem; }
  .interaction-footer { align-items: flex-start; flex-direction: column; gap: .7rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; }
}