/* ============================================================================
   URSAVUS — v2  ·  "A field guide to a deliberate game studio"
   Editorial / Swiss system with an exposed mathematical grid, taxonomic
   marginalia, and a deep-time signature. Fraunces · Inter · mono. Dual theme.
   ============================================================================ */

@font-face{font-family:"Fraunces";font-style:normal;font-weight:600;font-display:swap;src:url("../fonts/fraunces-600.woff2") format("woff2");}
@font-face{font-family:"Fraunces";font-style:italic;font-weight:400;font-display:swap;src:url("../fonts/fraunces-400-italic.woff2") format("woff2");}
@font-face{font-family:"Inter";font-style:normal;font-weight:400;font-display:swap;src:url("../fonts/inter-400.woff2") format("woff2");}
@font-face{font-family:"Inter";font-style:normal;font-weight:600;font-display:swap;src:url("../fonts/inter-600.woff2") format("woff2");}

/* ---------- tokens ---------- */
:root{
  --serif:"Fraunces",Georgia,"Times New Roman",serif;
  --sans:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --mono:ui-monospace,"SF Mono","JetBrains Mono","IBM Plex Mono",Menlo,Consolas,monospace;

  --maxw:1280px;
  --gut:clamp(20px,4.4vw,72px);
  --col:minmax(0,1fr);

  /* dark (default) */
  --bg:#0A0B0F;
  --bg-2:#0E1015;
  --panel:#101319;
  --ink:#ECEDF1;
  --ink-2:#9A9DA8;
  --ink-3:#5E626E;
  --line:#191C24;
  --line-2:#272B35;
  --accent:#7C73FF;
  --accent-2:#54E3C6;
  --accent-ink:#08090C;
  --grid:rgba(255,255,255,.030);
  --sel:rgba(124,115,255,.30);
  --shadow:0 40px 90px -50px rgba(0,0,0,.85);
}
[data-theme="light"]{
  --bg:#F4F3EC;
  --bg-2:#FBFAF5;
  --panel:#FFFFFF;
  --ink:#15161B;
  --ink-2:#585B63;
  --ink-3:#8E9099;
  --line:#E5E3D8;
  --line-2:#D4D2C5;
  --accent:#4B41E0;
  --accent-2:#0E9B86;
  --accent-ink:#FFFFFF;
  --grid:rgba(20,21,26,.045);
  --sel:rgba(75,65,224,.18);
  --shadow:0 40px 90px -55px rgba(31,31,46,.30);
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto;}}
body{
  margin:0;font-family:var(--sans);font-size:17px;line-height:1.6;
  color:var(--ink);background:var(--bg);
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
::selection{background:var(--sel);}

/* exposed graph-paper grid, very faint */
body::before{
  content:"";position:fixed;inset:0;z-index:-2;pointer-events:none;
  background-image:linear-gradient(var(--grid) 1px,transparent 1px),
                   linear-gradient(90deg,var(--grid) 1px,transparent 1px);
  background-size:clamp(40px,6vw,76px) clamp(40px,6vw,76px);
  -webkit-mask-image:radial-gradient(120% 100% at 50% 0%,#000 55%,transparent 100%);
          mask-image:radial-gradient(120% 100% at 50% 0%,#000 55%,transparent 100%);
}

a{color:inherit;text-decoration:none;}
img,svg,canvas{display:block;max-width:100%;}
hr{border:none;border-top:1px solid var(--line);margin:0;}
::-webkit-scrollbar{width:10px;height:10px;}
::-webkit-scrollbar-thumb{background:var(--line-2);border-radius:8px;}

.skip{position:absolute;left:-9999px;top:0;background:var(--accent);color:var(--accent-ink);padding:10px 16px;z-index:300;font-family:var(--mono);font-size:13px;border-radius:0 0 8px 0;}
.skip:focus{left:0;}

.wrap{max-width:var(--maxw);margin:0 auto;padding-inline:var(--gut);}

/* ---------- type ---------- */
h1,h2,h3,h4{font-family:var(--serif);font-weight:600;line-height:1.02;letter-spacing:-.018em;margin:0;color:var(--ink);}
h1 em,h2 em,h3 em,.disp em{font-style:italic;font-weight:400;color:var(--accent);}
.disp{font-family:var(--serif);font-weight:600;line-height:.98;letter-spacing:-.022em;font-size:clamp(2.7rem,8vw,7rem);}
h2{font-size:clamp(2rem,4.4vw,3.6rem);}
h3{font-size:clamp(1.25rem,2vw,1.6rem);letter-spacing:-.01em;}
p{margin:0 0 1.1em;}
strong{font-weight:600;color:var(--ink);}
em{font-style:italic;}
.lead{font-size:clamp(1.15rem,1.7vw,1.42rem);line-height:1.55;color:var(--ink-2);}
.muted{color:var(--ink-2);}
.faint{color:var(--ink-3);}
.serif{font-family:var(--serif);}
.mono{font-family:var(--mono);}

/* mono micro-label / catalog tag */
.tag{font-family:var(--mono);font-size:11.5px;letter-spacing:.26em;text-transform:uppercase;color:var(--ink-3);}
.tag--accent{color:var(--accent);}

/* drop initial for editorial openings */
.drop::first-letter{
  font-family:var(--serif);font-weight:600;float:left;font-size:3.4em;line-height:.8;
  padding:.06em .12em 0 0;color:var(--accent);
}

/* ---------- custom cursor ---------- */
@media (hover:hover) and (pointer:fine){
  body{cursor:none;}
  a,button,.magnetic,input,textarea,label[for],.tl-track{cursor:none;}
  .cursor{position:fixed;top:0;left:0;width:9px;height:9px;border-radius:50%;
    background:var(--accent);z-index:500;pointer-events:none;
    transform:translate(-50%,-50%);transition:width .2s,height .2s,background .2s,opacity .2s;}
  .cursor-ring{position:fixed;top:0;left:0;width:34px;height:34px;border:1px solid var(--ink-3);
    border-radius:50%;z-index:500;pointer-events:none;transform:translate(-50%,-50%);
    transition:width .25s cubic-bezier(.22,.61,.36,1),height .25s,border-color .25s,opacity .25s;}
  body.cursor-hot .cursor{width:5px;height:5px;}
  body.cursor-hot .cursor-ring{width:54px;height:54px;border-color:var(--accent);}
}
.cursor,.cursor-ring{display:none;}
@media (hover:hover) and (pointer:fine){.cursor,.cursor-ring{display:block;}}

/* ---------- header ---------- */
.site-head{position:fixed;top:0;left:0;right:0;z-index:200;
  transition:background .35s,backdrop-filter .35s,border-color .35s;border-bottom:1px solid transparent;}
.site-head.is-stuck{background:color-mix(in srgb,var(--bg) 72%,transparent);
  backdrop-filter:blur(16px) saturate(1.3);-webkit-backdrop-filter:blur(16px) saturate(1.3);border-bottom-color:var(--line);}
.head-row{display:flex;align-items:center;justify-content:space-between;gap:18px;height:74px;}
.brand{display:flex;align-items:center;gap:11px;font-family:var(--serif);font-weight:600;font-size:1.3rem;letter-spacing:-.01em;color:var(--ink);}
.brand .mark{width:24px;height:28px;color:var(--accent);transform-origin:50% 60%;transition:transform .7s cubic-bezier(.22,.61,.36,1);}
.brand:hover .mark{transform:rotate(-8deg) scale(1.06);}
.brand .mark path,.brand .mark circle{fill:currentColor;}
.brand small{font-family:var(--mono);font-size:10px;letter-spacing:.22em;text-transform:uppercase;color:var(--ink-3);align-self:flex-end;margin-bottom:5px;}
.nav{display:flex;align-items:center;gap:clamp(16px,2.2vw,30px);}
.nav a{font-family:var(--mono);font-size:12.5px;letter-spacing:.04em;color:var(--ink-2);position:relative;padding:6px 0;transition:color .2s;}
.nav a::after{content:"";position:absolute;left:0;right:100%;bottom:0;height:1px;background:var(--accent);transition:right .3s cubic-bezier(.22,.61,.36,1);}
.nav a:hover{color:var(--ink);}
.nav a:hover::after,.nav a.active::after{right:0;}
.nav a.active{color:var(--ink);}
.head-tools{display:flex;align-items:center;gap:14px;}
.tt{appearance:none;width:34px;height:34px;border-radius:50%;border:1px solid var(--line-2);background:var(--bg-2);display:grid;place-items:center;transition:border-color .2s,transform .3s;}
.tt:hover{border-color:var(--accent);transform:rotate(40deg);}
.tt-disc{width:13px;height:13px;border-radius:50%;background:var(--ink);box-shadow:inset -4px -2px 0 0 var(--bg-2);transition:.3s;}
[data-theme="light"] .tt-disc{background:var(--accent);box-shadow:none;}
.burger{display:none;}

/* ---------- hero ---------- */
.hero{position:relative;min-height:100svh;display:flex;align-items:center;padding-top:clamp(110px,14vh,168px);padding-bottom:clamp(56px,8vh,104px);overflow:hidden;}
.hero--page{min-height:clamp(520px,68vh,720px);}
.hero-field{position:absolute;inset:0;width:100%;height:100%;z-index:0;pointer-events:none;opacity:.92;}
.hero-field--lattice{opacity:.95;
  -webkit-mask-image:linear-gradient(to right,transparent 0%,transparent 20%,rgba(0,0,0,.4) 40%,#000 60%);
          mask-image:linear-gradient(to right,transparent 0%,transparent 20%,rgba(0,0,0,.4) 40%,#000 60%);}
.hero-field--ripple{opacity:.9;
  -webkit-mask-image:linear-gradient(to right,transparent 0%,transparent 26%,rgba(0,0,0,.42) 50%,#000 78%);
          mask-image:linear-gradient(to right,transparent 0%,transparent 26%,rgba(0,0,0,.42) 50%,#000 78%);}
.hero .wrap{position:relative;z-index:1;width:100%;}
.hero-eyebrow{display:flex;align-items:center;gap:14px;margin-bottom:clamp(18px,3vh,34px);}
.hero-eyebrow .rule{height:1px;width:clamp(40px,8vw,110px);background:var(--accent);opacity:.7;}
.hero h1{margin:0 0 .35em;max-width:18ch;}
.hero-foot{display:flex;flex-wrap:wrap;gap:clamp(20px,4vw,60px);align-items:flex-end;margin-top:clamp(22px,4vh,44px);}
.hero-foot .lead{max-width:46ch;margin:0;}
.scroll-cue{font-family:var(--mono);font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--ink-3);display:inline-flex;align-items:center;gap:9px;}
.scroll-cue .bar{width:1px;height:34px;background:linear-gradient(var(--accent),transparent);display:inline-block;position:relative;overflow:hidden;}
.scroll-cue .bar::after{content:"";position:absolute;top:-50%;left:0;width:1px;height:50%;background:var(--accent);animation:cue 1.9s cubic-bezier(.7,0,.3,1) infinite;}
@keyframes cue{0%{top:-50%}60%,100%{top:120%}}

/* taxonomy strip */
.taxon{border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.taxon-row{display:grid;grid-template-columns:repeat(4,1fr);}
.taxon-cell{padding:18px 0;border-left:1px solid var(--line);padding-left:18px;}
.taxon-cell:first-child{border-left:none;padding-left:0;}
.taxon-cell dt{font-family:var(--mono);font-size:10.5px;letter-spacing:.2em;text-transform:uppercase;color:var(--ink-3);margin-bottom:.5em;}
.taxon-cell dd{margin:0;font-family:var(--serif);font-size:clamp(1rem,1.5vw,1.25rem);color:var(--ink);}

/* ---------- sections / catalog ---------- */
.section{padding-block:clamp(72px,12vh,150px);position:relative;}
.section--line{border-top:1px solid var(--line);}
.cat-head{display:grid;grid-template-columns:auto 1fr;gap:clamp(16px,3vw,40px);align-items:baseline;margin-bottom:clamp(34px,6vh,68px);}
.cat-num{font-family:var(--mono);font-size:13px;letter-spacing:.1em;color:var(--accent);padding-top:.6em;}
.cat-title{max-width:20ch;}
.cat-sub{font-family:var(--mono);font-size:12px;letter-spacing:.04em;color:var(--ink-3);margin-top:1em;}

.grid12{display:grid;grid-template-columns:repeat(12,1fr);gap:clamp(18px,2.4vw,30px);}
.prose{max-width:60ch;}
.prose p{color:var(--ink-2);}
.prose .first{font-size:clamp(1.2rem,1.8vw,1.5rem);color:var(--ink);line-height:1.5;}

/* marginalia */
.margin-note{font-family:var(--mono);font-size:11.5px;line-height:1.7;letter-spacing:.01em;color:var(--ink-3);border-left:1px solid var(--line-2);padding-left:14px;}
.margin-note b{color:var(--accent);font-weight:400;}

/* field marks (principles) */
.marks{border-top:1px solid var(--line);}
.mark-row{display:grid;grid-template-columns:auto minmax(0,15rem) 1fr;gap:clamp(14px,3vw,44px);align-items:baseline;
  padding:clamp(22px,3vw,34px) 0;border-bottom:1px solid var(--line);transition:padding-left .35s cubic-bezier(.22,.61,.36,1);}
.mark-row:hover{padding-left:10px;}
.mark-row .ix{font-family:var(--mono);font-size:12px;color:var(--accent);}
.mark-row h3{font-size:clamp(1.3rem,2.2vw,1.9rem);}
.mark-row p{margin:0;color:var(--ink-2);max-width:54ch;}

/* specimen plate (games) */
.plate{border:1px solid var(--line);background:linear-gradient(180deg,var(--panel),var(--bg-2));border-radius:4px;overflow:hidden;position:relative;transition:border-color .3s,transform .3s;}
.plate:hover{border-color:var(--line-2);transform:translateY(-3px);}
.plate-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;padding:clamp(22px,3vw,32px);border-bottom:1px solid var(--line);}
.plate-id{font-family:var(--mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-3);}
.plate-name{font-family:var(--serif);font-weight:600;font-size:clamp(1.6rem,2.6vw,2.3rem);display:flex;align-items:center;gap:.42em;}
.plate-name .dot{width:9px;height:9px;border-radius:50%;background:var(--accent);}
.plate-kind{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);}
.plate-body{padding:clamp(22px,3vw,32px);}
.plate-body .sum{font-family:var(--serif);font-weight:600;font-size:clamp(1.15rem,1.7vw,1.4rem);line-height:1.25;margin-bottom:.7em;}
.plate-body p{color:var(--ink-2);}
.specs{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:4px;overflow:hidden;margin-top:1.2em;}
.specs>div{background:var(--panel);padding:15px 17px;}
.specs dt{font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--accent);margin-bottom:.5em;}
.specs dd{margin:0;color:var(--ink-2);font-size:.92rem;line-height:1.5;}

/* ---------- deep-time scale (signature) ---------- */
.deeptime{position:relative;}
.tl-stage{position:relative;margin-top:clamp(30px,6vh,60px);}
.tl-readout{display:grid;grid-template-columns:auto 1fr;gap:clamp(16px,3vw,40px);align-items:end;min-height:clamp(150px,22vh,210px);margin-bottom:30px;}
.tl-when{font-family:var(--mono);font-size:13px;letter-spacing:.06em;color:var(--accent);}
.tl-era{font-family:var(--serif);font-weight:600;font-size:clamp(2rem,4.6vw,3.6rem);line-height:1;margin:.18em 0 .35em;}
.tl-note{max-width:52ch;color:var(--ink-2);margin:0;}
.tl-figure{align-self:end;justify-self:end;width:clamp(54px,7vw,92px);color:var(--accent);opacity:.9;}
.tl-figure path,.tl-figure circle{fill:currentColor;}

.tl-track{position:relative;height:64px;border-top:1px solid var(--line);margin-top:18px;touch-action:none;user-select:none;}
.tl-axis{position:absolute;top:0;left:0;right:0;height:1px;background:var(--line-2);}
.tl-progress{position:absolute;top:0;left:0;height:1px;background:var(--accent);}
.tl-tick{position:absolute;top:0;width:1px;height:9px;background:var(--line-2);}
.tl-tick.major{height:15px;background:var(--ink-3);}
.tl-tick span{position:absolute;top:18px;left:50%;transform:translateX(-50%);white-space:nowrap;font-family:var(--mono);font-size:10.5px;letter-spacing:.08em;color:var(--ink-3);}
.tl-stop{position:absolute;top:-5px;width:11px;height:11px;border-radius:50%;background:var(--bg);border:1.5px solid var(--ink-3);transform:translateX(-50%);transition:border-color .2s,background .2s,transform .2s;}
.tl-stop.on{border-color:var(--accent);background:var(--accent);transform:translateX(-50%) scale(1.15);}
.tl-thumb{position:absolute;top:-9px;width:18px;height:18px;border-radius:50%;background:var(--accent);border:3px solid var(--bg);transform:translateX(-50%);box-shadow:0 0 0 1px var(--accent),0 8px 24px -8px var(--accent);transition:transform .08s;}
.tl-hint{font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3);margin-top:26px;}

/* ---------- buttons / links ---------- */
.btnrow{display:flex;flex-wrap:wrap;gap:14px;align-items:center;}
.btn{display:inline-flex;align-items:center;gap:.6em;font-family:var(--mono);font-size:12.5px;letter-spacing:.05em;text-transform:uppercase;
  padding:14px 22px;border-radius:3px;border:1px solid var(--line-2);color:var(--ink);background:var(--bg-2);transition:border-color .2s,background .2s,color .2s,transform .15s;}
.btn .arr{transition:transform .25s;}
.btn:hover{border-color:var(--accent);}
.btn:hover .arr{transform:translateX(4px);}
.btn--solid{background:var(--accent);border-color:var(--accent);color:var(--accent-ink);}
.btn--solid:hover{background:color-mix(in srgb,var(--accent) 88%,#000);}
.tlink{color:var(--accent);font-family:var(--mono);font-size:13px;letter-spacing:.02em;display:inline-flex;align-items:center;gap:.45em;position:relative;}
.tlink::after{content:"";position:absolute;left:0;right:100%;bottom:-2px;height:1px;background:var(--accent);transition:right .3s cubic-bezier(.22,.61,.36,1);}
.tlink:hover::after{right:0;}
.tlink .arr{transition:transform .25s;}
.tlink:hover .arr{transform:translateX(4px);}

/* contact */
.contact-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:clamp(30px,6vw,80px);align-items:end;}
.bigmail{font-family:var(--serif);font-weight:600;font-size:clamp(1.8rem,5vw,3.4rem);letter-spacing:-.02em;color:var(--ink);display:inline-block;position:relative;}
.bigmail::after{content:"";position:absolute;left:0;right:100%;bottom:.06em;height:2px;background:var(--accent);transition:right .4s cubic-bezier(.22,.61,.36,1);}
.bigmail:hover{color:var(--accent);}
.bigmail:hover::after{right:0;}

/* form */
.form{display:grid;gap:18px;max-width:560px;}
.field label{display:block;font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-2);margin-bottom:.6em;}
.field input,.field textarea{width:100%;font-family:var(--sans);font-size:16px;color:var(--ink);background:var(--bg-2);border:1px solid var(--line-2);border-radius:3px;padding:14px 16px;transition:border-color .2s,background .2s;}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--accent);background:var(--panel);}
.field textarea{resize:vertical;min-height:130px;}

/* ---------- footer ---------- */
.site-foot{border-top:1px solid var(--line);padding-block:clamp(48px,8vh,84px);}
.foot-top{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:clamp(28px,5vw,70px);align-items:start;}
.foot-mark{font-family:var(--serif);font-weight:600;font-size:clamp(1.9rem,3.2vw,2.6rem);line-height:1;display:flex;align-items:center;gap:.32em;margin:0 0 .5em;}
.foot-mark .mark{width:30px;height:36px;color:var(--accent);}
.foot-mark .mark path,.foot-mark .mark circle{fill:currentColor;}
.foot-brand p:not(.foot-mark){color:var(--ink-2);max-width:40ch;font-size:.96rem;}
.foot-col h4{font-family:var(--mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-3);font-weight:400;margin:0 0 1.1em;}
.foot-col a{display:block;color:var(--ink-2);font-size:.96rem;padding:5px 0;transition:color .2s;position:relative;width:fit-content;}
.foot-col a:hover{color:var(--accent);}
.foot-meta{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-top:clamp(34px,6vh,60px);padding-top:22px;border-top:1px solid var(--line);font-family:var(--mono);font-size:11.5px;letter-spacing:.04em;color:var(--ink-3);}

/* ---------- reveal motion ---------- */
html.js .reveal{opacity:0;transform:translateY(22px);}
html.js .reveal.in{opacity:1;transform:none;transition:opacity .9s cubic-bezier(.22,.61,.36,1),transform .9s cubic-bezier(.22,.61,.36,1);transition-delay:calc(var(--d,0)*1ms);}
@media (prefers-reduced-motion:reduce){
  html.js .reveal{opacity:1!important;transform:none!important;}
  .scroll-cue .bar::after{animation:none;}
  body{cursor:auto!important;}
  .cursor,.cursor-ring{display:none!important;}
}

/* ---------- responsive ---------- */
@media (max-width:1000px){
  .contact-grid{grid-template-columns:1fr;}
  .foot-top{grid-template-columns:1fr 1fr;}
  .foot-brand{grid-column:1/-1;}
}
@media (max-width:760px){
  body{font-size:16px;}
  .taxon-row{grid-template-columns:1fr 1fr;}
  .taxon-cell:nth-child(3){border-left:none;padding-left:0;}
  .taxon-cell{border-top:1px solid var(--line);padding-block:14px;}
  .taxon-cell:first-child,.taxon-cell:nth-child(2){border-top:none;}
  .cat-head{grid-template-columns:1fr;gap:8px;}
  .mark-row{grid-template-columns:auto 1fr;gap:10px 18px;}
  .mark-row p{grid-column:2;}
  .grid12{grid-template-columns:1fr;}
  .grid12>*{grid-column:1/-1!important;}
  .specs{grid-template-columns:1fr;}
  .disp{font-size:clamp(2.6rem,12vw,4rem);}
  .hero-field{opacity:.5;
    -webkit-mask-image:linear-gradient(to bottom,transparent 0%,transparent 26%,#000 62%);
            mask-image:linear-gradient(to bottom,transparent 0%,transparent 26%,#000 62%);}
  .foot-top{grid-template-columns:1fr;}
  .nav{display:none;position:fixed;inset:74px 0 auto 0;flex-direction:column;align-items:flex-start;gap:0;
    background:color-mix(in srgb,var(--bg) 96%,transparent);backdrop-filter:blur(18px);border-bottom:1px solid var(--line);padding:8px var(--gut) 18px;}
  .nav.open{display:flex;}
  .nav a{width:100%;padding:13px 0;border-bottom:1px solid var(--line);font-size:15px;}
  .burger{display:grid;place-items:center;width:36px;height:36px;border:1px solid var(--line-2);border-radius:6px;background:var(--bg-2);color:var(--ink);}
  .tl-figure{display:none;}
  .tl-readout{grid-template-columns:1fr;min-height:0;}
}