/* ==========================================================
   THE INSTITUTE — house design system (2026-09-28)
   Quiet, editorial: stone greys easing into white. One system for every line.
   ========================================================== */
:root{
  --bone:#F6F6F4; --linen:#ECECEA; --sand:#DFDFDC; --stone:#B4B4B1;
  --clay:#7F7F83; --umber:#535357; --ink:#1C1C1E; --white:#FFFFFF;
  --night:#151516; --night-2:#1F1F21; --night-line:rgba(246,246,244,.14);
  --line:rgba(28,28,30,.12); --line-strong:rgba(28,28,30,.28);
  --serif:'Montserrat','Helvetica Neue',Helvetica,Arial,sans-serif;
  --sans:'Montserrat','Helvetica Neue',Helvetica,Arial,sans-serif;
  --track:.22em; --ease:cubic-bezier(.22,.61,.36,1);
  --gutter:clamp(20px,4vw,56px); --max:1240px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:#FFFFFF linear-gradient(180deg,#E6E6E4 0%,#F2F2F0 30%,#FAFAF9 62%,#FFFFFF 100%) no-repeat;min-height:100vh;color:var(--ink);font-family:var(--sans);font-size:15px;line-height:1.7;font-weight:400;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
:focus-visible{outline:1.5px solid var(--ink);outline-offset:4px}
::selection{background:var(--sand)}
.skip{position:absolute;left:-9999px;top:12px;z-index:200;background:var(--ink);color:var(--bone);padding:10px 16px;font-size:11px;letter-spacing:var(--track);text-transform:uppercase}
.skip:focus{left:12px}
.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--gutter)}
.narrow{max-width:760px}

/* ---- type ---- */
.eyebrow{font-family:var(--sans);font-size:10.5px;font-weight:500;letter-spacing:var(--track);text-transform:uppercase;color:var(--clay);margin:0 0 20px}
.display{font-family:var(--serif);font-weight:300;font-size:clamp(30px,5.4vw,78px);line-height:1.12;letter-spacing:.16em;text-transform:uppercase;margin:0}
.h1{font-family:var(--serif);font-weight:300;font-size:clamp(26px,3.8vw,52px);line-height:1.15;letter-spacing:.14em;text-transform:uppercase;margin:0 0 28px}
.h2{font-family:var(--serif);font-weight:300;font-size:clamp(20px,2.3vw,30px);line-height:1.3;letter-spacing:.14em;text-transform:uppercase;margin:0 0 20px}
.h3{font-family:var(--sans);font-size:11px;font-weight:600;letter-spacing:var(--track);text-transform:uppercase;margin:0 0 12px}
.lede{font-size:clamp(16px,1.45vw,19px);line-height:1.65;color:var(--umber);max-width:620px;margin:0}
.muted{color:var(--clay)}
.small{font-size:12.5px;line-height:1.6}
em.serif{font-family:var(--serif);font-style:normal;font-weight:300;color:var(--clay)}

/* ---- header ---- */
.hd{position:sticky;top:0;z-index:50;background:rgba(246,246,244,.86);backdrop-filter:saturate(140%) blur(14px);-webkit-backdrop-filter:saturate(140%) blur(14px);border-bottom:1px solid transparent;transition:border-color .4s var(--ease)}
.hd.scrolled{border-bottom-color:var(--line)}
.hd-in{max-width:var(--max);margin:0 auto;padding:0 var(--gutter);height:64px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center}
.hd-l{display:flex;gap:28px;align-items:center}
.hd-r{display:flex;gap:28px;justify-content:flex-end;align-items:center}
.hd a.nl,.hd button.nl{font:500 10.5px/1 var(--sans);letter-spacing:var(--track);text-transform:uppercase;color:var(--ink);background:none;border:0;padding:8px 0;cursor:pointer;position:relative}
.nl::after{content:"";position:absolute;left:0;right:100%;bottom:2px;height:1px;background:currentColor;transition:right .45s var(--ease)}
.nl:hover::after,.nl[aria-expanded="true"]::after,.nl[aria-current="page"]::after{right:0}
.nl .car{display:inline-block;margin-left:7px;font-size:8px;transform:translateY(-1px);transition:transform .35s var(--ease)}
.nl[aria-expanded="true"] .car{transform:translateY(-1px) rotate(180deg)}
.mark{font:500 13px/1 var(--sans);letter-spacing:.34em;text-transform:none;white-space:nowrap}
.mark b{font-weight:600}
.hide-sm{}
/* dropdown panel */
.menu{position:absolute;left:0;right:0;top:64px;background:var(--bone);border-bottom:1px solid var(--line);
  opacity:0;visibility:hidden;transform:translateY(-6px);transition:opacity .35s var(--ease),transform .35s var(--ease),visibility 0s .35s}
.menu.open{opacity:1;visibility:visible;transform:none;transition:opacity .35s var(--ease),transform .35s var(--ease)}
.menu-in{max-width:var(--max);margin:0 auto;padding:36px var(--gutter) 44px;display:grid;grid-template-columns:repeat(4,1fr);gap:32px}
.menu h4{font:500 10px/1 var(--sans);letter-spacing:var(--track);text-transform:uppercase;color:var(--clay);margin:0 0 18px}
.menu a{display:block;padding:6px 0}
.menu a .t{font-family:var(--serif);font-size:19px;font-weight:300;letter-spacing:.02em;line-height:1.2;display:block;transition:opacity .3s}
.menu a .d{font-size:12px;color:var(--clay);display:block}
.menu a:hover .t{opacity:.55}
.scrim{position:fixed;inset:64px 0 0;background:rgba(28,28,30,.12);opacity:0;visibility:hidden;transition:opacity .35s var(--ease),visibility 0s .35s;z-index:40}
.scrim.open{opacity:1;visibility:visible;transition:opacity .35s var(--ease)}

/* ---- sections ---- */
.hero{padding:clamp(88px,14vw,180px) 0 clamp(64px,9vw,120px)}
.sec{padding:clamp(72px,9vw,128px) 0;border-top:1px solid var(--line)}
.sec.tint{background:var(--linen);border-top:0}
.sec.night{background:var(--night);color:var(--bone);border-top:0}
.sec.night .muted,.sec.night .eyebrow{color:var(--stone)}
.sec.night .lede{color:#C9C9C6}
.split{display:grid;grid-template-columns:5fr 7fr;gap:clamp(32px,6vw,96px);align-items:start}
.cols{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.cols.two{grid-template-columns:repeat(2,1fr)}
.cols.four{grid-template-columns:repeat(4,1fr)}
.cell{background:var(--bone);padding:clamp(28px,3vw,44px)}
.tint .cell{background:var(--linen)}
.cell p{margin:0;color:var(--umber)}
.cell .h3{margin-bottom:14px}
.tag{display:inline-block;font:500 9.5px/1 var(--sans);letter-spacing:var(--track);text-transform:uppercase;color:var(--clay);border:1px solid var(--line-strong);padding:6px 9px;margin-bottom:22px}
.price{font-family:var(--serif);font-weight:300;font-size:38px;letter-spacing:.02em;line-height:1;margin:6px 0 18px}
.price s{font-size:22px;color:var(--stone);margin-right:8px}

/* ---- links & buttons ---- */
.btn{display:inline-flex;align-items:center;gap:12px;font:500 10.5px/1 var(--sans);letter-spacing:var(--track);text-transform:uppercase;padding:17px 30px;border:1px solid var(--ink);background:var(--ink);color:var(--bone);cursor:pointer;transition:background .35s var(--ease),color .35s var(--ease)}
.btn:hover{background:transparent;color:var(--ink)}
.btn.ghost{background:transparent;color:var(--ink)}
.btn.ghost:hover{background:var(--ink);color:var(--bone)}
.night .btn{background:var(--bone);color:var(--ink);border-color:var(--bone)}
.night .btn:hover{background:transparent;color:var(--bone)}
.tl{font:500 10.5px/1 var(--sans);letter-spacing:var(--track);text-transform:uppercase;position:relative;padding-bottom:6px;display:inline-block}
.tl::after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:currentColor;transform-origin:left;transition:transform .45s var(--ease)}
.tl:hover::after{transform:scaleX(.35)}
.actions{display:flex;flex-wrap:wrap;gap:16px 28px;align-items:center;margin-top:40px}

/* ---- lists / tables ---- */
.dl{border-top:1px solid var(--line);margin:0}
.dl div{display:grid;grid-template-columns:220px 1fr;gap:24px;padding:16px 0;border-bottom:1px solid var(--line)}
.dl dt{font:500 10.5px/1.8 var(--sans);letter-spacing:var(--track);text-transform:uppercase;color:var(--clay)}
.dl dd{margin:0}
.rows{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.rows li{display:grid;grid-template-columns:48px 1fr;gap:20px;padding:22px 0;border-bottom:1px solid var(--line)}
.rows .n{font-family:var(--serif);font-size:13px;letter-spacing:.14em;padding-top:2px;color:var(--clay)}
.rows h3{font:500 13px/1.5 var(--sans);letter-spacing:.04em;margin:0 0 4px}
.rows p{margin:0;color:var(--umber)}
table.t{width:100%;border-collapse:collapse}
table.t th,table.t td{text-align:left;padding:14px 0;border-bottom:1px solid var(--line);vertical-align:top}
table.t th{font:500 10.5px/1 var(--sans);letter-spacing:var(--track);text-transform:uppercase;color:var(--clay)}
details.q{border-bottom:1px solid var(--line)}
details.q summary{list-style:none;cursor:pointer;padding:22px 32px 22px 0;position:relative;font-family:var(--serif);font-size:16px;font-weight:400}
details.q summary::-webkit-details-marker{display:none}
details.q summary::after{content:"+";position:absolute;right:0;top:20px;font-family:var(--sans);font-weight:300;font-size:20px;transition:transform .35s var(--ease)}
details.q[open] summary::after{transform:rotate(45deg)}
details.q p{margin:0 0 24px;color:var(--umber);max-width:680px}

/* ---- forms ---- */
.form{display:grid;gap:18px;max-width:560px}
.field label{display:block;font:500 10px/1 var(--sans);letter-spacing:var(--track);text-transform:uppercase;color:var(--clay);margin-bottom:10px}
.field input,.field select,.field textarea{width:100%;font:15px/1.5 var(--sans);color:var(--ink);background:transparent;border:0;border-bottom:1px solid var(--line-strong);padding:10px 0;border-radius:0;transition:border-color .3s}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-bottom-color:var(--ink)}
.field textarea{resize:vertical;min-height:96px}
.hp{position:absolute;left:-9999px}
.note{font-size:12.5px;color:var(--clay)}

/* ---- footer ---- */
.ft{border-top:1px solid var(--line);padding:64px 0 40px;font-size:12.5px;color:var(--umber)}
.ft-in{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px}
.ft h4{font:500 10px/1 var(--sans);letter-spacing:var(--track);text-transform:uppercase;color:var(--clay);margin:0 0 16px}
.ft a{display:block;padding:3px 0}
.ft a:hover{color:var(--ink)}
.ft-base{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;margin-top:56px;padding-top:24px;border-top:1px solid var(--line);font-size:11px;letter-spacing:.06em;color:var(--clay)}

/* ---- reveal ---- */
.rv{opacity:0;transform:translateY(14px);transition:opacity 1s var(--ease),transform 1s var(--ease)}
.rv.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}.rv{opacity:1;transform:none}}

/* ---- responsive ---- */
@media (max-width:900px){
  .split{grid-template-columns:1fr}
  .cols,.cols.four{grid-template-columns:1fr 1fr}
  .menu-in{grid-template-columns:1fr 1fr;gap:28px}
  .ft-in{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  body{font-size:14.5px}
  .hd-in{grid-template-columns:auto 1fr auto;height:58px}
  .menu{top:58px}.scrim{inset:58px 0 0}
  .hide-sm{display:none!important}
  .mark{font-size:11.5px;letter-spacing:.26em;justify-self:center}
  .cols,.cols.two,.cols.four{grid-template-columns:1fr}
  .menu-in{grid-template-columns:1fr;padding:24px var(--gutter) 32px;max-height:calc(100vh - 58px);overflow:auto}
  .menu a .t{font-size:18px}
  .dl div{grid-template-columns:1fr;gap:4px}
  .ft-in{grid-template-columns:1fr}
}

/* ==========================================================
   BADGE PALETTE (2026-10-06) — the site takes the colours of the i2P badge:
   #231F20 ground, white content, PMS 187 #AA1C2E accent (the bill).
   Tokens are inverted so every rule that used light-on-dark / dark-on-light keeps its contrast.
   ========================================================== */
:root{
  --bone:#231F20; --linen:#2B2627; --sand:#3A3435; --stone:#8E8889;
  --clay:#ABA5A6; --umber:#D8D4D4; --ink:#FFFFFF; --white:#FFFFFF;
  --night:#171415; --night-2:#1D1A1B; --night-line:rgba(255,255,255,.14);
  --line:rgba(255,255,255,.13); --line-strong:rgba(255,255,255,.32);
  --red:#AA1C2E; --red-hi:#C8293D;
}
html{background:#231F20;color-scheme:dark}
body{background:#231F20 radial-gradient(120% 80% at 50% -10%,#2E292A 0%,#231F20 55%,#1C191A 100%) no-repeat}
.hd{background:rgba(35,31,32,.88)}
/* The shared footer carries its own ground, so it reads the same on light product pages (CUTLINE). */
.ft{background:#231F20}
.scrim{background:rgba(0,0,0,.45)}
.sec.night{color:#FFFFFF}
.sec.night .lede{color:#C9C4C5}
.night [style*="color:var(--bone)"]{color:#FFFFFF!important}
::selection{background:var(--red);color:#FFFFFF}
:focus-visible{outline-color:var(--red)}
.eyebrow{color:var(--clay)}
.eyebrow::before{content:"";display:inline-block;width:18px;height:2px;background:var(--red);vertical-align:middle;margin:0 10px 2px 0}
.nl::after{background:var(--red)}
.tag{border-color:rgba(170,28,46,.6);color:#E4DFDF}
.btn,.night .btn{background:var(--red);border-color:var(--red);color:#FFFFFF}
.btn:hover,.night .btn:hover{background:transparent;color:#FFFFFF;border-color:var(--red)}
.btn.ghost{background:transparent;color:#FFFFFF;border-color:var(--line-strong)}
.btn.ghost:hover{background:#FFFFFF;color:#231F20;border-color:#FFFFFF}