/*
 * Template WebGL ARSTEMA XR Lab: wajah arstema.com di sekeliling kanvas Unity.
 *
 * Nilai token disalin dari repo arstema (21 Okt 2026): warna dari src/theme/theme.light.css
 * dan theme.dark.css, ukuran dari src/styles/tokens.css. Aturan header, footer, dan tombol
 * tema disalin dari src/situs/situs.css. Template ini dibangun di luar repo itu, jadi tidak
 * bisa mengimpornya; bila kerangka situs berubah, salin ulang bagian yang sama.
 * Aturan milik halaman ini berawalan xr-.
 */

@font-face {
  font-family: 'IBM Plex Sans';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('/kulit/plex-sans-400.woff2') format('woff2');
}
@font-face {
  font-family: 'IBM Plex Sans';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('/kulit/plex-sans-600.woff2') format('woff2');
}
@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('/kulit/plex-mono-500.woff2') format('woff2');
}

:root {
  --as-radius-sm: 6px;
  --as-space-3xs: 0.25rem;
  --as-space-2xs: 0.5rem;
  --as-space-sm: 1rem;
  --as-space-md: clamp(1.125rem, 1rem + 0.6vw, 1.5rem);
  --as-space-lg: clamp(1.5rem, 1.25rem + 1.1vw, 2rem);
  --as-space-xl: clamp(2rem, 1.6rem + 1.9vw, 3rem);
  --as-section-gap: clamp(2.25rem, 1.4rem + 3.4vw, 4.25rem);
  --as-content-max: 1680px;
  --as-reading-max: 68ch;
  --as-gutter: clamp(1rem, 0.55rem + 2.1vw, 3rem);
  --as-font-sans: 'IBM Plex Sans', system-ui, -apple-system, 'Segoe UI', Roboto,
    'Helvetica Neue', Arial, 'Noto Sans', sans-serif;
  --as-font-mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, 'SF Mono',
    Consolas, 'Liberation Mono', Menlo, monospace;
  --as-type-title: clamp(1.5rem, 1.1rem + 1.6vw, 2.125rem);
  --as-type-section: 1.0625rem;
  --as-type-body: 0.9375rem;
}

:root,
[data-theme='light'] {
  color-scheme: light;
  --as-page-bg: #f2efe7;
  --as-surface-primary: #f7f4ed;
  --as-surface-elevated: #fbfaf6;
  --as-surface-muted: #e9e3d7;
  --as-surface-interactive: #ddd5c6;
  --as-text-primary: #0b1815;
  --as-text-secondary: #3f4b47;
  --as-text-muted: #5d6863;
  --as-border-subtle: #dfd8ca;
  --as-border-default: #cbc3b3;
  --as-border-strong: #8b928b;
  --as-focus-ring: #0f6b58;
  --as-forest: #0a3029;
  --as-forest-deep: #061d19;
  --as-forest-raised: #0f3a32;
  --as-forest-line: #1d4a40;
  --as-on-forest: #f2efe7;
  --as-on-forest-muted: #a9b8b2;
  --as-signal: #f0a73d;
}

[data-theme='dark'] {
  color-scheme: dark;
  --as-page-bg: #07140f;
  --as-surface-primary: #0c1b16;
  --as-surface-elevated: #11231d;
  --as-surface-muted: #0a1813;
  --as-surface-interactive: #193129;
  --as-text-primary: #ebeee7;
  --as-text-secondary: #aebcb5;
  --as-text-muted: #82928b;
  --as-border-subtle: #1a2f28;
  --as-border-default: #28433a;
  --as-border-strong: #45645a;
  --as-focus-ring: #7fcfb6;
  --as-forest: #0b2c25;
  --as-forest-deep: #041310;
  --as-forest-raised: #10362e;
  --as-forest-line: #1f4a40;
  --as-on-forest: #f2efe7;
  --as-on-forest-muted: #a9b8b2;
  --as-signal: #f0a73d;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}
/* Elemen bergaya display tetap tersembunyi saat diberi atribut hidden. */
[hidden] {
  display: none !important;
}
body {
  margin: 0;
  background: var(--as-page-bg);
  color: var(--as-text-primary);
  font-family: var(--as-font-sans);
  line-height: 1.5;
}

/* --- Header (src/situs/situs.css) --------------------------------------- */

.as-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--as-surface-primary);
  border-bottom: 1px solid transparent;
  color: var(--as-text-primary);
}
.as-header__ukur {
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  height: 7px;
  pointer-events: none;
  background:
    linear-gradient(90deg, var(--as-signal) 0 0) left bottom / calc(var(--baca, 0) * 100%) 2px no-repeat,
    linear-gradient(var(--as-border-default) 0 0) left bottom / 100% 1px no-repeat,
    repeating-linear-gradient(90deg, var(--as-border-strong) 0 1px, transparent 1px 40px) left bottom / 100% 7px no-repeat,
    repeating-linear-gradient(90deg, var(--as-border-default) 0 1px, transparent 1px 8px) left bottom / 100% 3px no-repeat;
}
.as-header__bar {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--as-space-sm);
  max-width: var(--as-content-max);
  min-height: 4.25rem;
  margin: 0 auto;
  padding: 0.5rem var(--as-gutter);
}
.as-header-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  flex: 0 1 auto;
  min-width: 0;
  color: inherit;
  text-decoration: none;
}
.as-header-brand__mark {
  display: grid;
  place-items: center;
  width: 2.1rem;
  height: 2.1rem;
  flex: none;
}
.as-header-brand__mark svg {
  width: 100%;
  height: 100%;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.45;
  stroke-linecap: square;
  stroke-linejoin: miter;
}
.as-header-brand__mark .as-header-brand__signal {
  stroke: var(--as-signal);
}
.as-header-brand__text {
  display: grid;
  gap: 0.05rem;
  min-width: 0;
}
.as-header-brand__text strong {
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.23em;
  line-height: 1.2;
}
.as-header-brand__text small {
  display: none;
  color: var(--as-text-secondary);
  font: 400 0.61rem/1.2 var(--as-font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.as-header a:focus-visible {
  outline: 2px solid var(--as-focus-ring);
  outline-offset: 3px;
}
.as-header-nav {
  display: none;
  flex: 1 1 auto;
  justify-content: center;
  min-width: 0;
}
.as-header-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2.4vw, 2.3rem);
  margin: 0;
  padding: 0;
  list-style: none;
}
.as-header-nav__link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  min-height: 3rem;
  color: var(--as-text-primary);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-decoration: none;
  white-space: nowrap;
}
.as-header-nav__link::after {
  position: absolute;
  right: 0;
  bottom: 0.45rem;
  left: 0;
  height: 2px;
  content: '';
  background: var(--as-signal);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}
.as-header-nav__link:hover::after,
.as-header-nav__link[aria-current='page']::after {
  transform: scaleX(1);
  transform-origin: left;
}
.as-header-nav__link[aria-current='page']::before {
  position: absolute;
  top: 0.55rem;
  left: 50%;
  width: 0.28rem;
  height: 0.28rem;
  border-radius: 50%;
  content: '';
  background: var(--as-signal);
  transform: translateX(-50%);
}
.as-header-nav__academy {
  position: relative;
}
.as-header-nav__panel {
  position: absolute;
  top: calc(100% - 0.25rem);
  left: 50%;
  width: min(24rem, calc(100vw - 2rem));
  padding: 0.75rem;
  border: 1px solid var(--as-border-subtle);
  border-radius: 0.8rem;
  background: var(--as-surface-elevated);
  box-shadow: 0 24px 70px -30px var(--as-text-primary);
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 0.65rem);
  transition: opacity 0.25s ease, transform 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}
.as-header-nav__academy:hover .as-header-nav__panel,
.as-header-nav__academy:focus-within .as-header-nav__panel {
  opacity: 1;
  pointer-events: auto;
  transform: translate(-50%, 0);
}
.as-header-nav__panel-title {
  margin: 0.25rem 0.6rem 0.5rem;
  color: var(--as-text-muted);
  font: 500 0.62rem/1.4 var(--as-font-mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.as-header-nav__panel ul {
  display: grid;
  margin: 0;
  padding: 0;
  list-style: none;
}
.as-header-nav__panel a {
  display: grid;
  gap: 0.15rem;
  padding: 0.65rem 0.6rem;
  border-radius: 0.5rem;
  color: var(--as-text-primary);
  text-decoration: none;
}
.as-header-nav__panel a:hover {
  background: var(--as-surface-muted);
}
.as-header-nav__panel strong {
  font-size: 0.86rem;
  font-weight: 600;
}
.as-header-nav__panel small {
  color: var(--as-text-secondary);
  font-size: 0.74rem;
  line-height: 1.4;
}
.as-header-nav__pisah {
  align-self: center;
  width: 1px;
  height: 1.05rem;
  background: var(--as-border-default);
}
.as-header-nav__alat {
  color: var(--as-text-secondary);
}
.as-header-nav__alat:hover {
  color: var(--as-text-primary);
}
.as-header-nav__academy > a > span[aria-hidden='true'] {
  transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}
.as-header-nav__academy:hover > a > span[aria-hidden='true'],
.as-header-nav__academy:focus-within > a > span[aria-hidden='true'] {
  transform: rotate(180deg);
}
.as-header__actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-left: auto;
  flex: none;
}
@media (min-width: 64rem) {
  .as-header__bar {
    min-height: 5.25rem;
  }
  .as-header-brand {
    flex: 1 1 0;
  }
  .as-header-brand__text small {
    display: block;
  }
  .as-header-nav {
    display: flex;
    flex: 0 0 auto;
  }
  .as-header__actions {
    flex: 1 1 0;
    justify-content: flex-end;
  }
}

/* --- Halaman lab ----------------------------------------------------------- */

.xr-lompat {
  position: absolute;
  top: -10rem;
  left: var(--as-gutter);
  z-index: 50;
  padding: 0.75rem 1rem;
  border-radius: var(--as-radius-sm);
  background: var(--as-forest-deep);
  color: var(--as-on-forest);
  font-weight: 600;
  text-decoration: none;
}
.xr-lompat:focus {
  top: 0.5rem;
  outline: 2px solid var(--as-signal);
  outline-offset: 2px;
}

.xr-panggung {
  max-width: var(--as-content-max);
  margin: 0 auto;
  padding: var(--as-space-md) var(--as-gutter) 0;
}
.xr-judul {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0 var(--as-space-lg);
  margin-bottom: var(--as-space-2xs);
}
.xr-judul h1 {
  margin: 0;
  font-size: var(--as-type-title);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.15;
}
.xr-judul a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--as-text-secondary);
  font-size: 0.875rem;
  font-weight: 600;
  text-underline-offset: 0.25em;
}
.xr-judul a:hover {
  color: var(--as-text-primary);
}
.xr-judul a:focus-visible {
  outline: 2px solid var(--as-focus-ring);
  outline-offset: 3px;
}

/* Panggung: hutan di kedua tema, karena isi kanvasnya adegan 3D yang tidak ikut tema. */
.xr-layar {
  position: relative;
  /* Lebar ditulis: tanpa itu max-height ikut menyempitkan lebar demi menjaga rasio. */
  width: 100%;
  aspect-ratio: 16 / 10;
  min-height: 18rem;
  max-height: calc(100svh - 12rem);
  overflow: hidden;
  border: 1px solid var(--as-forest-line);
  border-radius: var(--as-radius-sm);
  background: var(--as-forest-deep);
}
.xr-layar canvas {
  display: block;
  width: 100%;
  height: 100%;
  /* Seret di kanvas menggerakkan lab, bukan menggulir halaman. */
  touch-action: none;
  /* "Langsung ke lab" menggulir kanvas ke bawah header lengket, bukan ke baliknya. */
  scroll-margin-top: 6.5rem;
}
.xr-layar canvas:focus-visible {
  outline: 2px solid var(--as-signal);
  outline-offset: -2px;
}
@media (max-width: 40rem) {
  .xr-layar {
    aspect-ratio: 3 / 4;
  }
}

.xr-muat,
.xr-gagal {
  position: absolute;
  inset: 0;
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 0.75rem;
  padding: var(--as-gutter);
  color: var(--as-on-forest);
  text-align: center;
}
.xr-muat p,
.xr-gagal p {
  margin: 0;
}
.xr-muat__judul,
.xr-gagal__judul {
  font-weight: 600;
}
/* Kemajuan muat digambar sebagai garis ukur header: strip tiap 8px, strip panjang tiap 40px. */
.xr-muat__ukur {
  width: min(22rem, 100%);
  height: 7px;
  background:
    linear-gradient(90deg, var(--as-signal) 0 0) left bottom / calc(var(--muat, 0) * 100%) 3px no-repeat,
    linear-gradient(var(--as-forest-line) 0 0) left bottom / 100% 1px no-repeat,
    repeating-linear-gradient(90deg, var(--as-on-forest-muted) 0 1px, transparent 1px 40px) left bottom / 100% 7px no-repeat,
    repeating-linear-gradient(90deg, var(--as-forest-line) 0 1px, transparent 1px 8px) left bottom / 100% 3px no-repeat;
}
.xr-muat__angka {
  font: 500 0.8rem/1 var(--as-font-mono);
  letter-spacing: 0.06em;
  font-variant-numeric: tabular-nums;
}
.xr-muat__catatan,
.xr-gagal__pesan {
  max-width: 34ch;
  color: var(--as-on-forest-muted);
  font-size: 0.8125rem;
}
.xr-gagal__pesan {
  max-width: 60ch;
  font-family: var(--as-font-mono);
  overflow-wrap: anywhere;
}

.xr-layar__kaki {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem var(--as-space-sm);
  padding-top: 0.75rem;
}
.xr-layar__kaki p {
  margin: 0;
  color: var(--as-text-muted);
  font: 500 0.72rem/1.5 var(--as-font-mono);
  letter-spacing: 0.04em;
}

.xr-tombol {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  padding: 0 0.9rem;
  border: 1px solid var(--as-border-default);
  border-radius: 0.25rem;
  background: transparent;
  color: var(--as-text-primary);
  font: inherit;
  font-size: 0.8125rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}
.xr-tombol:hover:not(:disabled) {
  border-color: var(--as-text-primary);
  background: var(--as-text-primary);
  color: var(--as-page-bg);
}
.xr-tombol:focus-visible {
  outline: 2px solid var(--as-focus-ring);
  outline-offset: 3px;
}
.xr-tombol:disabled {
  color: var(--as-text-muted);
  cursor: default;
}
/* Tepi on-forest-muted (8,5:1 di hutan), bukan forest-line (1,76:1): tombol ini satu-satunya jalan keluar dari galat. */
.xr-gagal .xr-tombol {
  border-color: var(--as-on-forest-muted);
  color: var(--as-on-forest);
}
.xr-gagal .xr-tombol:hover {
  border-color: var(--as-on-forest);
  background: var(--as-on-forest);
  color: var(--as-forest-deep);
}
.xr-gagal .xr-tombol:focus-visible {
  outline-color: var(--as-signal);
}

.xr-petunjuk {
  display: grid;
  gap: var(--as-space-xl);
  max-width: var(--as-content-max);
  margin: var(--as-section-gap) auto 0;
  padding: 0 var(--as-gutter);
}
.xr-petunjuk h2 {
  margin: 0 0 var(--as-space-sm);
  font-size: var(--as-type-section);
  font-weight: 600;
}
.xr-petunjuk p {
  max-width: var(--as-reading-max);
  margin: 0 0 0.75rem;
  color: var(--as-text-secondary);
  font-size: var(--as-type-body);
  line-height: 1.6;
}
.xr-kendali {
  display: grid;
  margin: 0;
  border-top: 1px solid var(--as-border-subtle);
}
.xr-kendali div {
  display: grid;
  grid-template-columns: minmax(9rem, max-content) 1fr;
  gap: var(--as-space-sm);
  align-items: center;
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--as-border-subtle);
  font-size: var(--as-type-body);
}
.xr-kendali dt {
  font-weight: 600;
}
.xr-kendali dd {
  margin: 0;
  color: var(--as-text-secondary);
}
.xr-kendali kbd {
  display: inline-grid;
  place-items: center;
  min-width: 1.75rem;
  height: 1.75rem;
  padding: 0 0.4rem;
  border: 1px solid var(--as-border-strong);
  border-bottom-width: 2px;
  border-radius: 4px;
  background: var(--as-surface-elevated);
  font: 500 0.8rem/1 var(--as-font-mono);
}
@media (min-width: 52rem) {
  .xr-petunjuk {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* --- Footer (src/situs/situs.css) ----------------------------------------- */

.as-shell-footer {
  margin-top: var(--as-section-gap);
  padding: clamp(3.5rem, 6vw, 6rem) var(--as-gutter) 1.5rem;
  background: var(--as-forest-deep);
  color: var(--as-on-forest);
}
.as-shell-footer__top,
.as-shell-footer__links,
.as-shell-footer__bottom {
  width: 100%;
  max-width: var(--as-content-max);
  min-width: 0;
  margin-inline: auto;
}
.as-shell-footer__top {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  padding-bottom: clamp(3rem, 6vw, 5.5rem);
}
.as-shell-footer__brand {
  display: grid;
  gap: 0.15rem;
  color: var(--as-on-forest);
  text-decoration: none;
}
.as-shell-footer__brand strong {
  font-size: 0.88rem;
  letter-spacing: 0.23em;
}
.as-shell-footer__brand small,
.as-shell-footer__note {
  color: var(--as-on-forest-muted);
  font: 400 0.64rem/1.4 var(--as-font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.as-shell-footer__note {
  margin: 0.9rem 0 0;
  font: inherit;
  font-size: 0.8rem;
  letter-spacing: 0;
  text-transform: none;
}
.as-shell-footer__statement {
  max-width: 48rem;
  margin: 0;
  font-size: clamp(2rem, 1.2rem + 3.2vw, 4.25rem);
  font-weight: 500;
  letter-spacing: -0.05em;
  line-height: 1.02;
  text-wrap: balance;
}
.as-shell-footer__links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2rem 1rem;
  padding: 2.25rem 0;
  border-block: 1px solid var(--as-forest-line);
}
.as-shell-footer__links section {
  display: grid;
  align-content: start;
  gap: 0.75rem;
  min-width: 0;
}
.as-shell-footer__links h2 {
  margin: 0 0 0.35rem;
  color: var(--as-on-forest-muted);
  font: 500 0.64rem/1.4 var(--as-font-mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.as-shell-footer a {
  justify-self: start;
  color: var(--as-on-forest);
  font-size: 0.84rem;
  text-decoration: none;
}
.as-shell-footer__links a {
  opacity: 0.78;
}
.as-shell-footer a:hover {
  opacity: 1;
  text-decoration: underline;
  text-underline-offset: 0.25em;
}
.as-shell-footer a:focus-visible {
  outline: 2px solid var(--as-signal);
  outline-offset: 3px;
}
.as-shell-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.7rem 2rem;
  padding-top: 1.5rem;
  color: var(--as-on-forest-muted);
  font: 400 0.64rem/1.4 var(--as-font-mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.as-shell-footer__theme {
  --as-surface-primary: var(--as-forest-deep);
  --as-surface-elevated: var(--as-forest-raised);
  --as-surface-interactive: var(--as-forest-raised);
  --as-text-primary: var(--as-on-forest);
  --as-text-secondary: var(--as-on-forest-muted);
  --as-border-default: var(--as-forest-line);
  --as-border-strong: var(--as-on-forest-muted);
  --as-focus-ring: var(--as-signal);

  text-transform: none;
  letter-spacing: 0;
}
.as-shell-footer__bottom a {
  font-size: inherit;
  color: var(--as-on-forest-muted);
}
@media (min-width: 52rem) {
  .as-shell-footer__top {
    grid-template-columns: 0.7fr 1fr;
    gap: 4rem;
  }
  .as-shell-footer__links {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 2rem;
  }
}

/* --- Tombol tema (src/situs/situs.css) ------------------------------------ */

.as-theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--as-space-3xs);
  min-width: 44px;
  min-height: 44px;
  padding: 0 var(--as-space-2xs);
  border: 1px solid var(--as-border-default);
  border-radius: var(--as-radius-sm);
  background: var(--as-surface-primary);
  color: var(--as-text-secondary);
  font: inherit;
  font-size: 0.8125rem;
  cursor: pointer;
  transition: background-color 120ms ease, border-color 120ms ease, color 120ms ease;
}
.as-theme-toggle:hover {
  border-color: var(--as-border-strong);
  background: var(--as-surface-interactive);
  color: var(--as-text-primary);
}
.as-theme-toggle:focus-visible {
  outline: 2px solid var(--as-focus-ring);
  outline-offset: 2px;
}
.as-theme-toggle__icon {
  display: inline-flex;
  width: 18px;
  height: 18px;
}
.as-theme-toggle__label {
  min-width: 8.5ch;
  text-align: left;
  white-space: nowrap;
}
/* React menukar ikonnya; di halaman statis keduanya ada dan tema memilih satu. */
[data-theme='dark'] .xr-ikon-terang,
:root:not([data-theme='dark']) .xr-ikon-gelap {
  display: none;
}
@media (max-width: 767px) {
  .as-theme-toggle__label {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
  }
}

@media (prefers-reduced-motion: reduce) {
  .as-header-nav__link::after,
  .as-header-nav__panel,
  .as-header-nav__academy > a > span[aria-hidden='true'],
  .xr-tombol,
  .as-theme-toggle {
    transition: none;
  }
}