/* ==========================================================================
   OntologyPlay — shared styles
   ========================================================================== */

@font-face{font-family:'Archivo';font-style:normal;font-weight:100 900;font-stretch:62% 125%;font-display:swap;src:url(../fonts/Archivo.woff2) format('woff2');}
@font-face{font-family:'JetBrains Mono';font-style:normal;font-weight:100 800;font-display:swap;src:url(../fonts/JetBrainsMono.woff2) format('woff2');}
@font-face{font-family:'Shippori Mincho';font-style:normal;font-weight:500;font-display:swap;src:url(../fonts/ShipporiMincho-500.woff2) format('woff2');}
@font-face{font-family:'Shippori Mincho';font-style:normal;font-weight:800;font-display:swap;src:url(../fonts/ShipporiMincho-800.woff2) format('woff2');}
@font-face{font-family:'Silkscreen';font-style:normal;font-weight:400;font-display:swap;src:url(../fonts/Silkscreen.woff2) format('woff2');}
@font-face{font-family:'Fredoka';font-style:normal;font-weight:300 700;font-display:swap;src:url(../fonts/Fredoka.woff2) format('woff2');}

:root{
  --bg:#0a0b0a;
  --bg-2:#111311;
  --fg:#eef1e8;
  --muted:#8b9086;
  --line:rgba(238,241,232,.12);
  --accent:#d8ff3e;
  --accent-ink:#0b0b0c;
  --cjk:'PingFang SC','Hiragino Sans GB','Microsoft YaHei','Noto Sans SC','Source Han Sans SC';
  --display:'Archivo',var(--cjk),system-ui,sans-serif;
  --mono:'JetBrains Mono',var(--cjk),ui-monospace,monospace;
  --gutter:clamp(16px,4vw,56px);
  --ease:cubic-bezier(.7,0,.2,1);
  --ease-out:cubic-bezier(.16,1,.3,1);
  color-scheme:dark;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
html.lenis,html.lenis body{height:auto}
.lenis.lenis-smooth{scroll-behavior:auto!important}
.lenis.lenis-stopped{overflow:hidden}
body{
  margin:0;background:var(--bg);color:var(--fg);
  font-family:var(--display);font-size:16px;line-height:1.55;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
img,video,canvas,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
::selection{background:var(--accent);color:var(--accent-ink)}
:focus-visible{outline:2px solid var(--accent);outline-offset:4px}

.mono{font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase}
.muted{color:var(--muted)}
.wrap{padding-inline:var(--gutter)}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* grain overlay */
.grain{
  position:fixed;inset:-50%;z-index:90;pointer-events:none;opacity:.06;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  animation:grain 1s steps(6) infinite;
}
@keyframes grain{
  0%{transform:translate(0,0)}20%{transform:translate(-3%,2%)}40%{transform:translate(2%,-4%)}
  60%{transform:translate(-4%,-2%)}80%{transform:translate(3%,3%)}100%{transform:translate(0,0)}
}

/* ---------------- nav ---------------- */
.nav{
  position:fixed;inset:0 0 auto 0;z-index:60;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px var(--gutter);
  mix-blend-mode:difference;color:#fff;
}
.nav__brand{display:flex;align-items:center;gap:10px;font-weight:700;font-stretch:110%;letter-spacing:-.01em;font-size:17px}
.nav__brand svg{width:28px;height:28px}
.nav__links{display:flex;gap:28px;align-items:center}
.nav__links a{position:relative;font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase}
.nav__links a::after{content:"";position:absolute;left:0;right:0;bottom:-4px;height:1px;background:currentColor;transform:scaleX(0);transform-origin:right;transition:transform .5s var(--ease-out)}
.nav__links a:hover::after,.nav__links a[aria-current="page"]::after{transform:scaleX(1);transform-origin:left}
.nav__clock{font-family:var(--mono);font-size:12px;letter-spacing:.06em;opacity:.8}
.nav__toggle{display:none;width:40px;height:40px;position:relative}
.nav__toggle span{position:absolute;left:8px;right:8px;height:1.5px;background:currentColor;transition:transform .4s var(--ease-out)}
.nav__toggle span:nth-child(1){top:15px}
.nav__toggle span:nth-child(2){top:24px}
.menu-open .nav__toggle span:nth-child(1){transform:translateY(4.5px) rotate(45deg)}
.menu-open .nav__toggle span:nth-child(2){transform:translateY(-4.5px) rotate(-45deg)}

.menu{
  position:fixed;inset:0;z-index:55;background:var(--accent);color:var(--accent-ink);
  display:flex;flex-direction:column;justify-content:flex-end;padding:96px var(--gutter) 40px;
  clip-path:inset(0 0 100% 0);transition:clip-path .7s var(--ease);
}
.menu-open .menu{clip-path:inset(0 0 0 0)}
.menu a{display:block;font-size:clamp(40px,12vw,72px);font-weight:800;font-stretch:80%;line-height:1;letter-spacing:-.03em;padding:6px 0;border-bottom:1px solid rgba(0,0,0,.15)}
.menu .mono{margin-top:28px}

@media (max-width:760px){
  .nav__links,.nav__clock{display:none}
  .nav__toggle{display:block}
  .menu-open .nav{mix-blend-mode:normal;color:var(--accent-ink)}
}

/* ---------------- language switch ---------------- */
.lang{display:inline-flex;align-items:center;gap:2px;padding:3px;border-radius:999px;box-shadow:inset 0 0 0 1px currentColor;font-family:var(--mono);font-size:11px;letter-spacing:.06em}
.lang span{padding:4px 8px;border-radius:999px;opacity:.55;transition:opacity .3s,background .3s,color .3s}
html:not(.lang-zh) .lang__en,html.lang-zh .lang__zh{opacity:1;background:currentColor}
html:not(.lang-zh) .nav .lang__en,html.lang-zh .nav .lang__zh{background:#fff;color:#000}
.lang--menu{margin-top:16px;font-size:14px;color:var(--accent-ink)}
html:not(.lang-zh) .lang--menu .lang__en,html.lang-zh .lang--menu .lang__zh{background:var(--accent-ink);color:var(--accent)}
.nav__brand{margin-right:auto}
.nav__links{position:absolute;left:50%;transform:translateX(-50%)}
.nav .lang{margin-left:20px}
@media (max-width:760px){.nav .lang{margin-left:auto;margin-right:4px}}

/* Chinese: CJK glyphs come from system fonts; relax Latin-tuned tracking */
html.lang-zh .mono{letter-spacing:.04em}
html.lang-zh :is(h1,h2,h3,.footer__word,.next__title,.mail__addr,.gcontact__mail,.links .l-name){letter-spacing:-.01em}

/* ---------------- cursor ---------------- */
.cursor{position:fixed;left:0;top:0;z-index:100;pointer-events:none;mix-blend-mode:difference}
.cursor__dot{position:absolute;width:6px;height:6px;margin:-3px 0 0 -3px;border-radius:50%;background:#fff}
.cursor__ring{
  position:absolute;width:38px;height:38px;margin:-19px 0 0 -19px;border-radius:50%;
  border:1px solid rgba(255,255,255,.7);
  display:grid;place-items:center;
  transition:width .35s var(--ease-out),height .35s var(--ease-out),margin .35s var(--ease-out),background-color .35s,border-color .35s;
}
.cursor__label{font-family:var(--mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:#000;opacity:0;transition:opacity .25s}
.cursor.is-hover .cursor__ring{width:64px;height:64px;margin:-32px 0 0 -32px;border-color:transparent;background:rgba(255,255,255,.95)}
.cursor.is-label .cursor__ring{width:96px;height:96px;margin:-48px 0 0 -48px;background:#fff;border-color:#fff}
.cursor.is-label .cursor__label{opacity:1}
.cursor.is-hidden{opacity:0}
@media (hover:none),(pointer:coarse){.cursor{display:none}}
@media (hover:hover) and (pointer:fine){html.has-cursor,html.has-cursor a,html.has-cursor button{cursor:none}}

/* ---------------- loader / page transition ---------------- */
.loader{
  position:fixed;inset:0;z-index:200;background:var(--bg);
  display:grid;place-items:center;
}
.loader__inner{display:flex;flex-direction:column;align-items:center;gap:22px}
.loader__mark{width:64px;height:64px;color:var(--accent)}
.loader__mark .edge{stroke-dasharray:120;stroke-dashoffset:120;animation:draw 1.2s var(--ease) forwards}
.loader__mark .node{opacity:0;animation:pop .4s var(--ease-out) forwards}
@keyframes draw{to{stroke-dashoffset:0}}
@keyframes pop{from{opacity:0;transform:scale(.2)}to{opacity:1;transform:scale(1)}}
.loader__count{font-family:var(--mono);font-size:12px;letter-spacing:.2em;color:var(--muted)}

.wipe{position:fixed;inset:0;z-index:150;pointer-events:none;display:grid;grid-template-columns:repeat(5,1fr)}
.wipe span{background:var(--accent);transform:scaleY(0);transform-origin:bottom}

/* ---------------- reveal helpers ---------------- */
[data-reveal]{opacity:0;transform:translateY(40px)}
.split-line{display:block;overflow:hidden;padding-bottom:.06em;margin-bottom:-.06em}
.split-line > span{display:inline-block;will-change:transform}
html.no-js [data-reveal],html.reduced [data-reveal]{opacity:1;transform:none}

/* ---------------- buttons ---------------- */
.btn{
  --b-bg:var(--fg);--b-fg:var(--bg);
  position:relative;display:inline-flex;align-items:center;gap:12px;
  height:54px;padding:0 26px;border-radius:999px;overflow:hidden;
  background:var(--b-bg);color:var(--b-fg);
  font-family:var(--mono);font-size:13px;letter-spacing:.06em;text-transform:uppercase;font-weight:600;
  isolation:isolate;white-space:nowrap;
}
.btn::before{
  content:"";position:absolute;inset:0;z-index:-1;background:var(--accent);
  border-radius:inherit;transform:translateY(101%);transition:transform .55s var(--ease-out);
}
.btn:hover::before{transform:translateY(0)}
.btn:hover{color:var(--accent-ink)}
.btn svg{width:16px;height:16px;flex:none}
.btn--ghost{--b-bg:transparent;--b-fg:var(--fg);box-shadow:inset 0 0 0 1px var(--line)}
.btn--accent{--b-bg:var(--accent);--b-fg:var(--accent-ink)}
.btn--accent::before{background:var(--fg)}

/* external link list (used on game pages) */
.links{display:grid;grid-template-columns:1fr;border-top:1px solid var(--line)}
@media (min-width:560px){.links{grid-template-columns:repeat(2,1fr)}}
@media (min-width:960px){.links{grid-template-columns:repeat(3,1fr)}}
.links a{
  position:relative;display:flex;justify-content:space-between;align-items:center;gap:12px;
  padding:26px 4px;border-bottom:1px solid var(--line);overflow:hidden;
}
.links a .l-name{font-size:clamp(22px,2.4vw,30px);font-weight:600;letter-spacing:-.02em;transition:transform .5s var(--ease-out)}
.links a .l-meta{font-family:var(--mono);font-size:11px;letter-spacing:.08em;color:var(--muted);text-transform:uppercase}
.links a svg{width:22px;height:22px;transition:transform .5s var(--ease-out)}
.links a:hover .l-name{transform:translateX(10px)}
.links a:hover svg{transform:rotate(45deg)}
@media (min-width:560px) and (max-width:959px){.links a:nth-child(odd){border-right:1px solid var(--line);padding-right:24px}.links a{padding-left:24px}}
@media (min-width:960px){.links a:not(:nth-child(3n)){border-right:1px solid var(--line);padding-right:24px}.links a{padding-left:24px}}

/* ---------------- shared game-page blocks ---------------- */
.kicker{color:var(--accent);margin:0 0 18px}
.mail__copy{display:inline-flex;align-items:center;gap:8px;padding:10px 16px;border-radius:999px;box-shadow:inset 0 0 0 1px var(--line);transition:background .3s,color .3s}
.mail__copy:hover{background:var(--accent);color:var(--accent-ink)}
.mail__copy svg{width:15px;height:15px}

.glinks{padding-block:clamp(96px,12vw,180px) clamp(64px,8vw,120px)}
.glinks__title{margin:0 0 48px;font-size:clamp(40px,7vw,112px);line-height:.92;letter-spacing:-.04em}
.gcontact{display:flex;flex-wrap:wrap;align-items:center;gap:16px 28px;margin-top:64px;padding:28px;border-radius:16px;box-shadow:inset 0 0 0 1px var(--line)}
.gcontact__mail{font-size:clamp(20px,3vw,40px);letter-spacing:-.02em;font-weight:500;overflow-wrap:anywhere;flex:1;min-width:0;transition:color .3s}
.gcontact__mail:hover{color:var(--accent)}

.next{position:relative;display:flex;flex-direction:column;justify-content:center;gap:12px;min-height:56vh;padding:64px var(--gutter);overflow:hidden;isolation:isolate;border-top:1px solid var(--line)}
.next img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:-1;opacity:.18;filter:grayscale(1);transform:scale(1.08);transition:opacity .8s var(--ease-out),transform 1.2s var(--ease-out),filter .8s}
.next:hover img{opacity:.55;filter:none;transform:scale(1)}
.next .mono{color:var(--muted)}
.next__title{font-size:clamp(44px,10vw,180px);line-height:.88;letter-spacing:-.045em;font-weight:800;font-stretch:85%;text-transform:uppercase;transition:transform .8s var(--ease-out)}
.next:hover .next__title{transform:translateX(2vw)}

/* ---------------- footer ---------------- */
.footer{position:relative;padding:96px var(--gutter) 28px;border-top:1px solid var(--line);overflow:hidden}
.footer__top{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:40px;margin-bottom:80px}
.footer h4{margin:0 0 16px;font-family:var(--mono);font-size:11px;font-weight:400;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.footer ul{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.footer li a{position:relative;font-size:16px;transition:color .3s}
.footer li a:hover{color:var(--accent)}
.footer__word{
  font-weight:900;font-stretch:125%;letter-spacing:-.05em;line-height:.8;
  font-size:clamp(40px,10.6vw,200px);white-space:nowrap;
  color:transparent;-webkit-text-stroke:1px rgba(238,241,232,.22);
  user-select:none;
}
.footer__word span{display:inline-block}
.footer__bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;margin-top:28px}

/* toast */
.toast{
  position:fixed;left:50%;bottom:28px;z-index:120;transform:translate(-50%,140%);
  background:var(--accent);color:var(--accent-ink);padding:12px 20px;border-radius:999px;
  font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;font-weight:600;
  transition:transform .5s var(--ease-out);pointer-events:none;
}
.toast.is-on{transform:translate(-50%,0)}

/* lightbox */
.lightbox{
  position:fixed;inset:0;z-index:140;display:grid;place-items:center;padding:4vw;
  background:rgba(5,6,5,.92);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  opacity:0;visibility:hidden;transition:opacity .4s,visibility .4s;
}
.lightbox.is-open{opacity:1;visibility:visible}
.lightbox img{max-height:86vh;width:auto;border-radius:6px;transform:scale(.96);transition:transform .5s var(--ease-out)}
.lightbox.is-open img{transform:scale(1)}
.lightbox__close,.lightbox__nav{position:absolute;font-family:var(--mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;padding:12px}
.lightbox__close{top:16px;right:16px}
.lightbox__nav--prev{left:8px;top:50%}
.lightbox__nav--next{right:8px;top:50%}
.lightbox__count{position:absolute;bottom:20px;left:50%;transform:translateX(-50%)}

@media (prefers-reduced-motion:reduce){
  .grain{animation:none}
  *{transition-duration:.01ms!important;animation-duration:.01ms!important}
}