/* wildstack.ai — /principles
   Shared chrome (tokens, header, menu, footer) mirrors index.html;
   plus text-first prose styles for the principle pages. */
:root{
  --bg:#EDEBE4;--paper:#F7F6F2;--sand:#E7E4DC;
  --ink:#0C0C0E;--ink-2:#1A1A1D;--soft:#5B5B62;--faint:#6A6A72;--hint:#9A9AA1;
  --cobalt:#1B34F0;--cobalt-soft:#5A6CFF;--cobalt-on-dark:#8C9AFF;--cyan:#5FD0FF;
  --rule:rgba(12,12,14,.1);--rule-2:rgba(12,12,14,.12);--rule-3:rgba(12,12,14,.16);--rule-4:rgba(12,12,14,.18);
  --maxw:1320px;
  --display:"Archivo","Helvetica Neue",Helvetica,sans-serif;
  --body:"Instrument Sans","Helvetica Neue",system-ui,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,"SFMono-Regular",Menlo,monospace;
  --ease:cubic-bezier(.77,0,.18,1);--ease-out:cubic-bezier(.22,.7,.3,1);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--body);font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4,p{margin:0}
button{font:inherit;color:inherit}
::selection{background:var(--cobalt);color:var(--paper)}
:focus-visible{outline:2px solid var(--cobalt);outline-offset:3px}
.btn:focus-visible,.nav-cta:focus-visible{outline:2px solid var(--paper);outline-offset:-5px}
@media (prefers-reduced-motion:reduce){*{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important}}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 32px}
.eyebrow{font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--faint)}
.eyebrow-c{font-family:var(--mono);font-size:11px;letter-spacing:.1em;line-height:1.7;text-transform:uppercase;color:var(--cobalt)}
.skip-link{position:fixed;top:8px;left:8px;z-index:300;background:var(--ink);color:var(--paper);font-family:var(--mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;padding:12px 16px;transform:translateY(-160%);transition:transform .18s ease}
.skip-link:focus-visible{transform:none;outline-offset:2px}

/* buttons */
.btn{position:relative;overflow:hidden;isolation:isolate;display:inline-flex;align-items:center;justify-content:center;gap:12px;font-family:var(--mono);font-size:11.5px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;background:var(--cobalt);color:var(--paper);border:0;cursor:pointer;border-radius:2px;padding:20px 32px;box-shadow:0 12px 30px rgba(27,52,240,.26);white-space:nowrap}
.btn::before{content:"";position:absolute;inset:0;background:var(--ink);transform:translateY(101%);transition:transform .4s var(--ease);z-index:-1}
.btn:hover::before{transform:translateY(0)}

/* header */
.site-header{position:sticky;top:0;z-index:80;background:rgba(237,235,228,.86);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--rule)}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px;gap:24px;white-space:nowrap}
.brand{display:flex;align-items:baseline;gap:10px;color:var(--ink)}
.brand .name{font-family:var(--display);font-size:20px;font-weight:800;font-variation-settings:"wdth" 88;letter-spacing:-.035em}
.brand .name i{font-style:normal;color:var(--cobalt)}
.brand .loc{font-family:var(--mono);font-size:10px;letter-spacing:.14em;color:var(--faint);text-transform:uppercase}
.nav-links{display:flex;gap:32px;list-style:none;margin:0;padding:0}
.nav-links li{white-space:nowrap}
.nav-links a{position:relative;display:inline-block;font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--soft);padding-bottom:3px;transition:color .18s}
.nav-links a::after{content:"";position:absolute;left:0;right:0;bottom:-3px;height:1px;background:var(--cobalt);transform:scaleX(0);transform-origin:right;transition:transform .35s var(--ease)}
.nav-links a:hover,.nav-links a.active{color:var(--ink)}
.nav-links a:hover::after,.nav-links a.active::after{transform:scaleX(1);transform-origin:left}
.nav-cta{position:relative;overflow:hidden;isolation:isolate;display:inline-flex;align-items:center;min-height:44px;white-space:nowrap;font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;background:var(--cobalt);color:var(--paper);border:0;cursor:pointer;padding:0 20px;border-radius:2px;box-shadow:0 6px 18px rgba(27,52,240,.24)}
.nav-cta::before{content:"";position:absolute;inset:0;background:var(--ink);transform:translateY(101%);transition:transform .4s var(--ease);z-index:-1}
.nav-cta:hover::before{transform:translateY(0)}
.nav-right{display:flex;align-items:center;gap:10px}
.nav-menu{display:contents}
.nav-links a .arr{display:none}
.menu-foot{display:none}
.nav-burger{display:none;width:44px;height:44px;padding:0;flex-direction:column;align-items:center;justify-content:center;gap:6px;background:transparent;border:1px solid rgba(12,12,14,.14);border-radius:50%;cursor:pointer}
.nav-burger span{display:block;width:18px;height:1.5px;background:var(--ink);transition:transform .3s}
.site-header.nav-open .nav-burger span:nth-child(1){transform:translateY(3.75px) rotate(45deg)}
.site-header.nav-open .nav-burger span:nth-child(2){transform:translateY(-3.75px) rotate(-45deg)}
body.nav-lock{overflow:hidden}
@keyframes rise{from{transform:translateY(14px)}to{transform:translateY(0)}}

/* footer */
.site-footer{padding:44px 0 36px;overflow:hidden;border-top:1px solid var(--rule)}
.foot-mark{font-family:var(--display);font-weight:800;font-variation-settings:"wdth" 78;font-size:clamp(72px,14.6vw,230px);line-height:.8;letter-spacing:-.06em;margin:0 0 48px -.04em;white-space:nowrap;color:var(--ink)}
.foot-mark span{color:var(--cobalt)}
.foot-top{display:flex;justify-content:space-between;gap:36px;flex-wrap:wrap;align-items:flex-start}
.foot-top .note-p{margin-top:12px;max-width:34ch;color:var(--soft);font-size:14px}
.foot-cols{display:flex;gap:64px}
.foot-col h4{margin-bottom:14px;font-family:var(--mono);font-size:9.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--faint);font-weight:400}
.foot-col a{display:block;font-size:14px;color:var(--soft);transition:color .18s}
.foot-col .links{display:flex;flex-direction:column;gap:8px}
.foot-col a:hover{color:var(--cobalt)}
.foot-bottom{margin-top:40px;padding-top:22px;border-top:1px solid var(--rule);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-family:var(--mono);font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--faint)}

/* ---------- principle pages: one column, text first ---------- */
.prose-page{padding:clamp(56px,7vw,96px) 0 clamp(72px,8vw,120px)}
.prose-page .wrap{max-width:820px}
.page-head{display:flex;flex-direction:column;gap:18px;padding-bottom:36px;border-bottom:1px solid var(--rule);margin-bottom:44px}
.page-head .crumb{display:inline-block;width:max-content;transition:color .18s}
.page-head .crumb:hover{color:var(--ink)}
.page-head h1{font-family:var(--display);font-size:clamp(36px,5.4vw,64px);font-weight:800;font-variation-settings:"wdth" 82;line-height:.94;letter-spacing:-.04em;text-transform:uppercase;text-wrap:balance;max-width:16ch}
.pnum-big{font-family:var(--display);font-size:clamp(40px,5vw,56px);font-weight:800;font-variation-settings:"wdth" 78;letter-spacing:-.05em;line-height:.9;color:var(--cobalt);margin-top:6px}
.page-head .summary,.page-head .lede{font-family:var(--display);font-weight:400;font-variation-settings:"wdth" 104;font-size:clamp(18px,1.6vw,22px);line-height:1.3;letter-spacing:-.018em;color:var(--soft);max-width:38ch;text-wrap:pretty}
.prose{display:flex;flex-direction:column;gap:20px;max-width:68ch}
.prose h2{font-family:var(--display);font-size:22px;font-weight:700;font-variation-settings:"wdth" 90;letter-spacing:-.025em;line-height:1.15;margin-top:28px;padding-top:26px;border-top:1px solid var(--rule)}
.prose h2::before{content:"";display:block;width:38px;height:3px;background:var(--cobalt);margin:-27px 0 22px}
.prose p{font-size:17.5px;line-height:1.65;color:var(--ink-2);text-wrap:pretty}
.prose p.lede{font-size:19px;line-height:1.55;color:var(--ink)}
.prose p.layer strong{font-family:var(--display);font-weight:700;font-variation-settings:"wdth" 92;letter-spacing:-.02em;color:var(--ink)}
.prose a{color:var(--cobalt);border-bottom:1px solid rgba(27,52,240,.3);transition:border-color .18s}
.prose a:hover{border-color:var(--cobalt)}
.prose strong{color:var(--ink)}

/* index list */
.plist{display:flex;flex-direction:column;border-top:1px solid var(--rule);margin-bottom:56px}
.prow{display:grid;grid-template-columns:96px 1fr;gap:20px;padding:26px 0;border-bottom:1px solid var(--rule);position:relative;isolation:isolate;transition:color .3s}
.prow::before{content:"";position:absolute;left:-20px;right:-20px;top:0;bottom:0;background:var(--cobalt);transform:scaleX(0);transform-origin:left;transition:transform .45s var(--ease);z-index:-1}
.prow:hover::before{transform:scaleX(1)}
.prow:hover,.prow:hover .pdesc,.prow:hover .pnum,.prow:hover .arr{color:var(--paper)}
.pnum{font-family:var(--display);font-size:clamp(34px,4vw,48px);font-weight:800;font-variation-settings:"wdth" 78;letter-spacing:-.05em;line-height:.9;color:var(--ink);padding-top:3px;transition:color .3s}
.pbody{display:flex;flex-direction:column;gap:8px;min-width:0}
.ptitle{font-family:var(--display);font-size:clamp(20px,2.2vw,26px);font-weight:700;font-variation-settings:"wdth" 90;letter-spacing:-.03em;line-height:1.1;color:var(--ink)}
.ptitle .arr{color:var(--cobalt);display:inline-block;margin-left:8px;transition:transform .35s var(--ease-out),color .3s}
.prow:hover .ptitle .arr{transform:translateX(6px)}
.pdesc{font-size:15.5px;line-height:1.55;color:var(--soft);max-width:60ch;transition:color .3s}

/* prev / next */
.pager{display:grid;grid-template-columns:1fr 1fr 1fr;gap:1px;background:var(--rule);border:1px solid var(--rule);margin-top:64px}
.pg{display:flex;flex-direction:column;gap:10px;padding:22px 20px 24px;background:var(--bg);font-family:var(--display);font-size:16px;font-weight:600;font-variation-settings:"wdth" 92;letter-spacing:-.02em;line-height:1.2;color:var(--ink);transition:background .2s,color .2s}
.pg.next{text-align:right;align-items:flex-end}
.pg.all{text-align:center;align-items:center;background:var(--paper)}
a.pg:hover{background:var(--cobalt);color:var(--paper)}
a.pg:hover .eyebrow{color:#C9D0FF}

/* ---------- responsive ---------- */
@media (max-width:1100px){
  .nav-burger{display:flex}
  .nav-menu{display:flex;flex-direction:column;position:absolute;left:0;right:0;top:100%;height:calc(100vh - 72px);height:calc(100dvh - 72px);z-index:79;background:var(--ink);color:var(--paper);padding:28px 20px 24px;overflow-y:auto;visibility:hidden;opacity:0;pointer-events:none}
  .site-header.nav-open .nav-menu{visibility:visible;opacity:1;pointer-events:auto;animation:rise .25s var(--ease-out)}
  .nav-links{flex-direction:column;gap:0}
  .nav-links li{width:100%}
  .nav-links a{display:flex;justify-content:space-between;align-items:baseline;padding:18px 0;border-bottom:1px solid rgba(255,255,255,.1);color:var(--paper);font-family:var(--display);font-size:clamp(28px,8vw,40px);font-weight:800;font-variation-settings:"wdth" 82;letter-spacing:-.04em;line-height:1;text-transform:uppercase}
  .nav-links a::after{display:none}
  .nav-links a .arr{display:inline;font-family:var(--mono);font-size:14px;letter-spacing:0;color:var(--cobalt-on-dark);font-weight:400}
  .nav-links a:hover,.nav-links a.active{color:var(--cobalt-on-dark)}
  .menu-foot{margin-top:auto;display:flex;flex-direction:column;gap:18px;padding-top:32px}
  .menu-cta{width:100%;padding:22px;font-size:12px;box-shadow:none}
  .menu-meta{font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:#6B7580;display:flex;justify-content:space-between}
}
@media (max-width:900px){
  .pager{grid-template-columns:1fr}
  .pg,.pg.next,.pg.all{text-align:left;align-items:flex-start}
  .foot-cols{gap:40px}
}
@media (max-width:640px){
  .wrap{padding:0 20px}
  .nav{height:64px;gap:12px}
  .nav-cta{display:none}
  .nav-menu{height:calc(100vh - 64px);height:calc(100dvh - 64px)}
  .prose-page{padding:44px 0 72px}
  .page-head{gap:14px;padding-bottom:28px;margin-bottom:32px}
  .page-head h1{font-size:clamp(32px,10vw,44px)}
  .prose p{font-size:16.5px}
  .prose p.lede{font-size:17.5px}
  .prow{grid-template-columns:52px 1fr;gap:12px;padding:20px 0}
  .prow::before{left:-12px;right:-12px}
  .pnum{font-size:30px}
  .ptitle{font-size:20px}
  .foot-mark{font-size:clamp(44px,13.4vw,72px);margin-bottom:32px;letter-spacing:-.06em}
  .foot-cols{gap:32px;flex-direction:column}
}