:root {
  --bg: #050505;
  --fg: #ffffff;
  --muted: #9d9d9d;
  --dim: #6d6d6d;
  --hair: rgba(255, 255, 255, .12);
  --accent: #e2211c;
  --pad: clamp(20px, 4vw, 64px);
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100svh;
  overflow-x: hidden;
  background: radial-gradient(1300px 900px at 50% 42%, #070a12 0%, #050505 58%, #010102 100%) fixed;
  color: var(--fg);
  font-family: var(--mono);
  -webkit-font-smoothing: antialiased;
}

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

h1,
h2,
h3,
p,
ul,
ol {
  margin: 0;
  padding: 0;
}

ul,
ol {
  list-style: none;
}

::selection {
  background: var(--accent);
  color: #fff;
}

#gl {
  position: fixed;
  inset: 0;
  z-index: 0;
  display: block;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0;
  transition: opacity .9s ease;
}

#gl.is-ready {
  opacity: 1;
}

.grid-overlay {
  position: fixed;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .035) 1px, transparent 1px);
  background-size: 90px 90px;
  mask-image: radial-gradient(circle at 50% 50%, #000 0, transparent 72%);
  -webkit-mask-image: radial-gradient(circle at 50% 50%, #000 0, transparent 72%);
}

.cursor-glow {
  position: fixed;
  top: 0;
  left: 0;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  pointer-events: none;
  z-index: 3;
  background: radial-gradient(circle, rgba(186, 206, 255, .42) 0%, rgba(186, 206, 255, .15) 38%, transparent 70%);
  mix-blend-mode: screen;
  opacity: 0;
  transition: opacity .28s ease;
}

.cursor-glow.is-active {
  opacity: 1;
}

main {
  position: relative;
  z-index: 2;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 26px var(--pad);
  mix-blend-mode: difference;
}

.brand {
  font-size: clamp(18px, 2.2vw, 22px);
  font-weight: 500;
  letter-spacing: .28em;
  text-transform: none;
}

.main-nav {
  display: flex;
  gap: clamp(14px, 2.4vw, 34px);
}

.main-nav a {
  position: relative;
  padding-bottom: 4px;
  font-size: 12px;
  font-weight: 300;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, .72);
  transition: color .2s ease;
}

.main-nav a:hover {
  color: #fff;
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: #fff;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .24s ease;
}

.main-nav a:hover::after {
  transform: scaleX(1);
}

.scroll-rail {
  position: fixed;
  left: 24px;
  top: 50%;
  z-index: 100;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 20px;
  mix-blend-mode: difference;
}

.rail-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
}

.rail-item span {
  display: block;
  width: 16px;
  height: 1px;
  background: rgba(255, 255, 255, .45);
  transition: width .3s ease, background .3s ease;
}

.rail-item em {
  position: absolute;
  left: 26px;
  font-size: 10px;
  font-style: normal;
  letter-spacing: .12em;
  white-space: nowrap;
  color: rgba(255, 255, 255, .38);
  opacity: 0;
  transform: translateX(-6px);
  transition: opacity .24s ease, transform .24s ease;
}

.rail-item.is-active span {
  width: 24px;
  background: #fff;
}

.rail-item.is-active em {
  color: #fff;
  opacity: 1;
  transform: translateX(0);
}

.loader {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 22px;
  background: var(--bg);
  transition: opacity .5s ease;
}

.loader.is-hidden {
  opacity: 0;
  pointer-events: none;
}

.loader-brand {
  font-size: clamp(18px, 2.2vw, 22px);
  letter-spacing: .28em;
}

.loader-track {
  width: min(320px, 58vw);
  height: 1px;
  background: #262626;
  overflow: hidden;
}

.loader-track span {
  display: block;
  width: 0;
  height: 100%;
  background: #fff;
  transition: width .25s ease;
}

.loader-status {
  font-size: 11px;
  color: var(--muted);
  letter-spacing: .18em;
}

.panel {
  position: relative;
  min-height: 100svh;
  padding: 150px var(--pad) 90px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.panel::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(90deg, rgba(5, 5, 5, .72) 0%, rgba(5, 5, 5, .22) 58%, rgba(5, 5, 5, .58) 100%);
}

.panel--hero {
  justify-content: space-between;
  padding-top: 24vh;
}

.panel--hero::before {
  background: linear-gradient(90deg, rgba(5, 5, 5, .54) 0%, transparent 62%);
}

.hero-copy {
  max-width: 900px;
}

.eyebrow {
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--muted);
}

h1 {
  margin: 22px 0 26px;
  font-family: var(--sans);
  font-size: clamp(38px, 6.4vw, 90px);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: .03em;
}

.hero-desc {
  max-width: 520px;
  font-size: 14px;
  line-height: 1.85;
  color: #b4b4b4;
}

.hero-bottom {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 40px;
}

.model-hitbox {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 46%;
  height: 70%;
  transform: translate(-50%, -50%);
  z-index: 4;
  cursor: grab;
  touch-action: none;
  user-select: none;
}

.model-hitbox.is-dragging {
  cursor: grabbing;
}

.scroll-cue {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--muted);
}

.scroll-cue span {
  width: 48px;
  height: 1px;
  background: #fff;
  animation: cue 2.2s ease-in-out infinite;
}

@keyframes cue {
  0% {
    transform: scaleX(0);
    transform-origin: left;
  }

  55% {
    transform: scaleX(1);
    transform-origin: left;
  }

  56% {
    transform-origin: right;
  }

  100% {
    transform: scaleX(0);
    transform-origin: right;
  }
}

.news {
  width: min(400px, 100%);
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, .07);
  background: rgba(5, 5, 5, .52);
  backdrop-filter: blur(10px);
}

.news-title {
  margin-bottom: 14px;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--muted);
}

.news li {
  display: grid;
  gap: 4px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, .08);
}

.news li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.news time {
  font-size: 10px;
  color: var(--dim);
  letter-spacing: .12em;
}

.news a {
  font-size: 12px;
  line-height: 1.5;
  color: #e3e3e3;
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 48px;
}

.section-head h2 {
  font-family: var(--sans);
  font-size: clamp(30px, 4vw, 58px);
  font-weight: 300;
  letter-spacing: .18em;
  text-transform: uppercase;
}

.section-count {
  font-size: 12px;
  color: var(--dim);
  letter-spacing: .18em;
}

.project-list {
  width: min(1120px, 100%);
  margin-left: auto;
}

.project-item {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  gap: 24px;
  padding: 34px 0;
  border-top: 1px solid var(--hair);
}

.project-meta {
  font-size: 12px;
  color: var(--dim);
  letter-spacing: .14em;
}

.project-body h3 {
  margin-bottom: 14px;
  font-family: var(--sans);
  font-size: clamp(28px, 3.4vw, 52px);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: .04em;
}

.project-body p {
  max-width: 520px;
  margin-bottom: 18px;
  font-size: 14px;
  line-height: 1.8;
  color: #adadad;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tags li {
  padding: 6px 10px;
  border: 1px solid rgba(255, 255, 255, .24);
  font-size: 10px;
  letter-spacing: .08em;
  color: #dadada;
}

.about-inner {
  max-width: 1000px;
}

.statement {
  margin: 22px 0 48px;
  font-family: var(--sans);
  font-size: clamp(30px, 5.4vw, 74px);
  font-weight: 600;
  line-height: 1.28;
  letter-spacing: .04em;
}

.about-detail {
  max-width: 460px;
  font-size: 14px;
  line-height: 1.85;
  color: #a9a9a9;
}

.service-list {
  width: min(980px, 100%);
  margin-left: auto;
}

.service-item {
  display: grid;
  gap: 10px;
  padding: 30px 0;
  border-top: 1px solid var(--hair);
}

.service-item .num {
  font-size: 11px;
  color: var(--dim);
  letter-spacing: .18em;
}

.service-item h3 {
  margin-bottom: 6px;
  font-family: var(--sans);
  font-size: clamp(24px, 3vw, 42px);
  font-weight: 400;
  letter-spacing: .04em;
}

.service-item p {
  max-width: 620px;
  font-size: 14px;
  line-height: 1.8;
  color: #ababab;
}

.join-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 48px;
}

.join-grid h2 {
  margin: 22px 0 28px;
  font-family: var(--sans);
  font-size: clamp(36px, 5.6vw, 82px);
  font-weight: 300;
  line-height: 1.15;
  letter-spacing: .03em;
}

.join-note {
  max-width: 480px;
  font-size: 14px;
  line-height: 1.85;
  color: #a9a9a9;
}

.join-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 148px;
  min-height: 44px;
  padding: 0 22px;
  border: 1px solid rgba(255, 255, 255, .32);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  transition: background .2s ease, color .2s ease, border-color .2s ease;
}

.button:hover {
  border-color: #fff;
  background: #fff;
  color: var(--bg);
}

.button--solid {
  background: #fff;
  border-color: #fff;
  color: var(--bg);
}

.button--solid:hover {
  background: transparent;
  color: #fff;
}

.site-footer {
  position: relative;
  z-index: 2;
  padding: 90px var(--pad) 36px;
  background: #050505;
  border-top: 1px solid rgba(255, 255, 255, .1);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 32px;
}

.footer-label {
  margin-bottom: 16px;
  font-size: 11px;
  color: var(--dim);
  letter-spacing: .18em;
}

.footer-grid a,
.footer-grid span {
  display: block;
  margin-bottom: 8px;
  font-size: 12px;
  color: #bdbdbd;
  transition: color .2s ease;
}

.footer-grid a:hover {
  color: #fff;
}

.copyright {
  margin-top: 70px;
  font-size: 11px;
  color: #5d5d5d;
  letter-spacing: .08em;
}

@media (max-width: 860px) {
  .panel {
    padding-top: 130px;
  }

  .panel::before {
    background: rgba(5, 5, 5, .76);
  }

  .panel--hero::before {
    background: rgba(5, 5, 5, .62);
  }

  .scroll-rail {
    display: none;
  }

  .site-header {
    padding: 20px var(--pad);
  }

  .main-nav a {
    font-size: 10px;
    letter-spacing: .08em;
  }

  .hero-bottom {
    align-items: flex-start;
    flex-direction: column;
    gap: 28px;
  }

  .model-hitbox {
    width: 82%;
    height: 56%;
  }

  .project-item {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .project-list,
  .service-list {
    margin-left: 0;
  }

  .join-grid {
    grid-template-columns: 1fr;
    align-items: start;
  }

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

  .footer-grid > div:first-child {
    grid-column: 1 / -1;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .scroll-cue span {
    animation: none;
  }
}

/* survey modal */
.survey-overlay {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--pad);
  background: rgba(0, 0, 0, .78);
  backdrop-filter: blur(10px);
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s ease;
}

.survey-overlay.is-open {
  opacity: 1;
  pointer-events: auto;
}

.survey-dialog {
  position: relative;
  width: min(520px, 100%);
  max-height: min(82vh, 680px);
  overflow-y: auto;
  padding: 44px 36px 36px;
  background: #0a0a0a;
  border: 1px solid var(--hair);
}

.survey-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 36px;
  height: 36px;
  border: 1px solid var(--hair);
  background: transparent;
  color: #fff;
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  transition: background .2s ease, color .2s ease;
}

.survey-close:hover {
  background: #fff;
  color: var(--bg);
}

.survey-eyebrow {
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--dim);
}

.survey-dialog h2 {
  margin: 10px 0 28px;
  font-family: var(--sans);
  font-size: clamp(24px, 3.2vw, 32px);
  font-weight: 500;
}

.survey-field {
  display: block;
  margin-bottom: 18px;
}

.survey-field span {
  display: block;
  margin-bottom: 8px;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--dim);
  text-transform: uppercase;
}

.survey-field input,
.survey-field textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--hair);
  background: transparent;
  color: #fff;
  font-family: var(--sans);
  font-size: 14px;
  resize: vertical;
}

.survey-field input:focus,
.survey-field textarea:focus {
  outline: none;
  border-color: #fff;
}

.survey-submit {
  width: 100%;
  margin-top: 6px;
  cursor: pointer;
  font-family: var(--mono);
}

.survey-done {
  padding: 24px 0 8px;
  text-align: center;
}

.survey-done p {
  margin-bottom: 24px;
  font-size: 15px;
  color: #dadada;
}

@media (max-width: 860px) {
  .survey-dialog {
    padding: 36px 22px 28px;
  }
}
/* survey options */
fieldset.survey-field {
  border: 0;
  padding: 0;
  margin: 0 0 18px;
  min-width: 0;
}

.survey-options {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 22px;
}

.survey-option {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--sans);
  font-size: 13px;
  color: #dadada;
  cursor: pointer;
}

.survey-option input {
  width: auto;
  margin: 0;
  padding: 0;
  border: 0;
  accent-color: var(--accent);
  cursor: pointer;
}

.survey-other {
  margin-top: 12px;
}
/* survey embed mode */
.survey-dialog--embed {
  display: flex;
  flex-direction: column;
  width: min(880px, 100%);
  height: calc(100vh - 2 * var(--pad) - 4px);
  padding: 18px 20px 10px;
  overflow: hidden;
}

.survey-dialog--embed .survey-eyebrow {
  margin-bottom: 0;
}

.survey-dialog--embed h2 {
  margin: 4px 0 10px;
  font-size: clamp(19px, 2.2vw, 24px);
}

.survey-frame {
  display: block;
  flex: 1 1 auto;
  width: 100%;
  min-height: 0;
  height: auto;
  border: 1px solid var(--hair);
  background: #fff;
}

.survey-frame-fallback {
  margin-top: 8px;
  text-align: right;
}

.survey-frame-fallback .button {
  min-width: 0;
  min-height: 32px;
  padding: 0 14px;
  font-size: 11px;
  font-family: var(--mono);
}
/* heading description text bolder */
.hero-desc,
.project-body p,
.about-detail,
.service-item p,
.join-note {
  font-weight: 500;
}