/* calx-ai.de: warm paper, one grotesk, one green. The hero is a plan whose
   assumptions get tested line by line; three of them carry the decision. */

/* Geist (SIL OFL 1.1, assets/fonts/OFL.txt), self-hosted: the same five subsets and
   unicode ranges Google Fonts serves for wght 300..700. */
/* cyrillic-ext */
@font-face {
  font-family: 'Geist';
  font-style: normal;
  font-weight: 300 700;
  font-display: swap;
  src: url(/assets/fonts/geist-cyrillic-ext.woff2) format('woff2');
  unicode-range: U+0460-052F, U+1C80-1C8A, U+20B4, U+2DE0-2DFF, U+A640-A69F, U+FE2E-FE2F;
}
/* cyrillic */
@font-face {
  font-family: 'Geist';
  font-style: normal;
  font-weight: 300 700;
  font-display: swap;
  src: url(/assets/fonts/geist-cyrillic.woff2) format('woff2');
  unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116;
}
/* vietnamese */
@font-face {
  font-family: 'Geist';
  font-style: normal;
  font-weight: 300 700;
  font-display: swap;
  src: url(/assets/fonts/geist-vietnamese.woff2) format('woff2');
  unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB;
}
/* latin-ext */
@font-face {
  font-family: 'Geist';
  font-style: normal;
  font-weight: 300 700;
  font-display: swap;
  src: url(/assets/fonts/geist-latin-ext.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
/* latin */
@font-face {
  font-family: 'Geist';
  font-style: normal;
  font-weight: 300 700;
  font-display: swap;
  src: url(/assets/fonts/geist-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root{
  --bg:#f2f1ec;
  --bg-2:#e8e7e0;
  --card:#fbfbf8;
  --fg:#121412;
  --fg-2:#5b5e5a;
  --fg-3:#999b95;
  --line:rgba(18,20,18,.12);
  --sig:#1f7a4d;
  --deep:#0e2419;
  --on-deep:#ebeee6;
  --mint:#8fdcaf;
  --wrap:1360px;
  --gut:clamp(20px,3.4vw,48px);
  --ease:cubic-bezier(.2,.7,.1,1);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--fg);
  font:400 17px/1.55 Geist,ui-sans-serif,system-ui,sans-serif;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;
}
a{color:inherit;text-decoration:none}
h1,h2,h3,p,figure{margin:0}
ol{list-style:none;margin:0;padding:0}
::selection{background:var(--sig);color:#fff}
:focus-visible{outline:2px solid var(--sig);outline-offset:3px}

.wrap{max-width:var(--wrap);margin:0 auto;padding:0 var(--gut)}
.skip{position:absolute;left:-999px;top:0;background:var(--fg);color:var(--bg);padding:10px 14px;z-index:99}
.skip:focus{left:8px;top:8px}

.arr{width:.9em;height:.9em;flex:none;transition:transform .35s var(--ease)}
a:hover .arr{transform:translateX(4px)}

/* ---------------------------------------------------------------- header */

.head{position:fixed;inset:0 0 auto;z-index:20;transition:background .3s,border-color .3s;border-bottom:1px solid transparent}
.head.stuck{background:rgba(242,241,236,.82);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-color:var(--line)}
.head.deep{background:rgba(14,36,25,.86);border-color:rgba(235,238,230,.1);color:var(--on-deep)}
.head.deep .nav a{color:rgba(235,238,230,.62)}
.head.deep .nav a:hover{color:var(--on-deep)}
.head-in{display:flex;align-items:center;justify-content:space-between;height:68px}
.mark{font-weight:600;font-size:21px;letter-spacing:-.04em}
.nav{display:flex;gap:30px;font-size:15px}
.nav a{color:var(--fg-2);transition:color .2s}
.nav a:hover,.nav a[aria-current]{color:var(--fg)}

/* ---------------------------------------------------------------- hero */

.hero{min-height:100svh;display:flex;align-items:center}
.hero-grid{
  width:100%;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.08fr);
  gap:clamp(40px,6vw,104px);align-items:center;padding-top:96px;padding-bottom:40px;
}
.hero-h{
  font-weight:500;font-size:clamp(40px,5.1vw,80px);line-height:.98;letter-spacing:-.047em;
  max-width:12ch;text-wrap:balance;
}
.hero-lede{margin:32px 0 40px;max-width:34ch;color:var(--fg-2);font-size:19px;line-height:1.5}
.cta{
  display:inline-flex;align-items:center;gap:12px;
  background:var(--sig);color:#fff;font-weight:500;font-size:15px;
  padding:14px 20px;border-radius:2px;transition:background .25s;
}
.cta:hover{background:var(--fg)}

/* the plan: a document whose lines are tested one by one */
.plan{
  background:var(--card);border:1px solid var(--line);border-radius:3px;
  padding:22px 28px 18px;box-shadow:0 1px 0 rgba(0,0,0,.03),0 30px 60px -30px rgba(20,30,20,.25);
  font-size:14px;line-height:1.4;
}
.plan-head{display:flex;justify-content:space-between;gap:16px;font-size:13px;color:var(--fg-3);padding-bottom:14px;border-bottom:1px solid var(--line);margin-bottom:6px}
.plan-head span:first-child{color:var(--fg);font-weight:500}
.plan-count b{font-weight:500;color:var(--fg);font-variant-numeric:tabular-nums}
.plan-lines li{
  position:relative;display:grid;grid-template-columns:26px 1fr auto;gap:14px;align-items:baseline;
  padding:7px 10px;margin:0 -10px;border-radius:2px;
  background:linear-gradient(var(--sig),var(--sig)) no-repeat 0 0/0% 100%;
  transition:color .5s,background-size .7s var(--ease);
}
.plan-lines li+li{box-shadow:inset 0 1px 0 rgba(18,20,18,.06)}
.pl-n{color:var(--fg-3);font-size:12.5px;font-variant-numeric:tabular-nums;transition:color .5s}
.pl-v{font-size:12.5px;color:var(--fg-3);opacity:0;transform:translateX(-6px);transition:opacity .4s,transform .4s var(--ease);white-space:nowrap}
/* the line under test */
.plan-lines li.now{background-color:rgba(31,122,77,.07)}
/* tested: most lines hold and recede */
.plan-lines li.t,html:not(.js) .plan-lines li{color:var(--fg-3)}
.plan-lines li.t .pl-v,html:not(.js) .pl-v{opacity:1;transform:none}
/* three carry the decision */
.plan-lines li.lb.t,html:not(.js) .plan-lines li.lb{color:#fff;background-size:100% 100%;box-shadow:none}
.plan-lines li.lb.t+li{box-shadow:none}
.plan-lines li.lb.t .pl-n,.plan-lines li.lb.t .pl-v,html:not(.js) .lb .pl-n,html:not(.js) .lb .pl-v{color:rgba(255,255,255,.8)}
.plan-lines li.lb.t .pl-v{font-weight:500;color:#fff}
.plan.done li:not(.lb):hover{color:var(--fg)}
.plan-foot{margin-top:14px;padding-top:14px;border-top:1px solid var(--line);font-size:13px;color:var(--fg-2);opacity:0;transition:opacity .6s}
.plan.done .plan-foot,html:not(.js) .plan-foot{opacity:1}

/* ---------------------------------------------------------------- band */

.band{background:var(--deep);color:var(--on-deep);padding:clamp(96px,13vw,190px) 0}
.band-h{font-size:clamp(32px,4.4vw,68px);line-height:1.02;letter-spacing:-.045em;font-weight:500;max-width:23ch;text-wrap:balance}
.band-h span{color:rgba(235,238,230,.42)}
.band-q{
  margin-top:clamp(56px,7vw,96px);padding-top:28px;border-top:1px solid rgba(235,238,230,.16);
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.08fr);gap:clamp(40px,6vw,104px);
  font-size:clamp(19px,1.6vw,23px);line-height:1.4;letter-spacing:-.012em;color:var(--mint);
}
.band-q::before{content:"The question we ask first";font-size:14px;letter-spacing:0;color:rgba(235,238,230,.5)}

/* ---------------------------------------------------------------- index */

.index{border-top:1px solid var(--line)}
.index a{
  display:grid;grid-template-columns:minmax(0,5fr) minmax(0,6fr) auto;gap:clamp(24px,4vw,64px);
  align-items:center;padding:clamp(26px,3vw,40px) 0;border-bottom:1px solid var(--line);
}
.index h3{font-size:clamp(34px,4.6vw,72px);font-weight:500;letter-spacing:-.05em;line-height:1;transition:transform .5s var(--ease),color .3s}
.index p{color:var(--fg-2);font-size:18px;max-width:38ch}
.index .arr{width:30px;height:30px;color:var(--fg-3);transition:transform .35s var(--ease),color .3s}
.index a:hover h3{transform:translateX(14px);color:var(--sig)}
.index a:hover .arr{color:var(--sig)}

/* ---------------------------------------------------------------- sections */

.sec{padding:clamp(72px,9vw,128px) 0}
.sec-tight{padding-top:0}
.sec-line{border-top:1px solid var(--line)}
.sec-head{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:clamp(36px,5vw,64px)}
.sec-head h2{font-size:15px;font-weight:500;color:var(--fg-2)}
.more{display:inline-flex;align-items:center;gap:10px;font-size:15px;color:var(--fg);font-weight:500}
.more:hover{color:var(--sig)}

.glyph{display:block;width:100%;height:auto;aspect-ratio:4/3;overflow:hidden}
.glyph g{fill:none;stroke-linecap:round;stroke-linejoin:round}
.glyph *{vector-effect:non-scaling-stroke}
.glyph .g-grey{stroke:rgba(0,0,0,.22);stroke-width:1}
.glyph .g-sig{stroke:var(--sig);stroke-width:2}
.glyph .g-sig circle{fill:var(--sig);stroke:none}
/* notes */
.notes{border-top:1px solid var(--line)}
.note a{
  display:grid;grid-template-columns:180px 1fr auto;gap:32px;align-items:start;
  padding:34px 0 38px;border-bottom:1px solid var(--line);
}
.note time{color:var(--fg-3);font-size:15px;padding-top:9px}
.note-title{font-size:clamp(26px,2.8vw,40px);font-weight:500;letter-spacing:-.035em;line-height:1.08;margin-bottom:14px;transition:color .25s}
.note p{color:var(--fg-2);max-width:60ch}
.note .arr{width:28px;height:28px;margin-top:6px;color:var(--fg-3);transition:transform .35s var(--ease),color .25s}
.note a:hover .note-title,.note a:hover .arr{color:var(--sig)}

/* contact */
.contact{border-top:1px solid var(--line);padding:clamp(90px,13vw,190px) 0 clamp(70px,9vw,120px)}
.contact-lede{color:var(--fg-2);font-size:19px;margin-bottom:22px}
.mail{
  display:inline-flex;align-items:center;gap:.25em;
  font-size:clamp(34px,5.4vw,80px);font-weight:500;letter-spacing:-.045em;line-height:1;
  transition:color .25s;
}
.mail .arr{width:.6em;height:.6em}
.mail:hover{color:var(--sig)}

/* ---------------------------------------------------------------- inner pages */

.phead{position:relative;overflow:hidden;padding:clamp(150px,20vw,230px) 0 clamp(64px,8vw,110px)}
.phead .wrap{position:relative}
.crumb{color:var(--fg-3);font-size:15px;margin-bottom:28px;display:flex;gap:18px}
.crumb a:hover{color:var(--fg)}
.display{font-size:clamp(40px,5.4vw,84px);font-weight:500;letter-spacing:-.045em;line-height:.95;max-width:14ch;text-wrap:balance}
.phead-lede{margin-top:40px;font-size:clamp(20px,1.9vw,26px);line-height:1.35;letter-spacing:-.015em;color:var(--fg-2);max-width:36ch}

.rows{border-top:1px solid var(--line)}
.row{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:clamp(32px,6vw,96px);padding:clamp(48px,6vw,80px) 0;border-bottom:1px solid var(--line);scroll-margin-top:80px}
.row-art .glyph{max-width:460px}
.row h2{font-size:clamp(32px,3.6vw,52px);font-weight:500;letter-spacing:-.045em;line-height:1;margin-bottom:22px}
.row-lead{font-size:clamp(20px,1.7vw,24px);line-height:1.35;letter-spacing:-.015em;margin-bottom:20px;max-width:30ch}
.row-text p:not(.row-lead){color:var(--fg-2);max-width:58ch}

.not{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:clamp(32px,6vw,96px)}
.not-h{font-size:clamp(34px,4.4vw,64px);font-weight:500;letter-spacing:-.05em;line-height:1;max-width:11ch}
.not-body p{font-size:clamp(18px,1.5vw,21px);color:var(--fg-2);max-width:46ch;margin-bottom:22px}
.not-body p:first-child{color:var(--fg)}

.essay{padding:clamp(150px,18vw,210px) 0 clamp(80px,10vw,140px)}
.essay .wrap{max-width:calc(820px + 2*var(--gut))}
.essay-h{font-size:clamp(40px,5.6vw,80px);max-width:none}
.essay-lede{margin-top:32px;font-size:clamp(20px,1.8vw,24px);line-height:1.4;letter-spacing:-.015em;color:var(--fg-2)}
.prose{margin-top:56px;padding-top:40px;border-top:1px solid var(--line);font-size:19px;line-height:1.65;color:#2a2a28}
.prose p+p{margin-top:1.1em}
.prose h2{font-size:26px;font-weight:500;letter-spacing:-.03em;color:var(--fg);margin:2em 0 .6em}

/* ---------------------------------------------------------------- footer */

.foot{border-top:1px solid var(--line);padding:36px 0 44px;font-size:14px;color:var(--fg-3)}
.foot-in{display:flex;align-items:center;gap:40px;flex-wrap:wrap}
.foot .mark{color:var(--fg);font-size:18px}
.foot-nav{display:flex;gap:24px;margin-right:auto}
.foot-nav a:hover,.legal a:hover{color:var(--fg)}
.legal{display:flex;gap:24px}

/* ---------------------------------------------------------------- motion */

.js .rise{opacity:0;transform:translateY(22px);transition:opacity .9s var(--ease),transform .9s var(--ease)}
.js .rise.in{opacity:1;transform:none}
.hero-h,.hero-lede,.hero .cta,.plan{animation:up 1.1s var(--ease) both}
.hero-lede{animation-delay:.1s}.hero .cta{animation-delay:.18s}.plan{animation-delay:.28s}
@keyframes up{from{opacity:0;transform:translateY(26px)}}
@media (prefers-reduced-motion:reduce){
  .js .rise{opacity:1;transform:none;transition:none}
  .hero-h,.hero-lede,.hero .cta,.plan{animation:none}
}

/* ---------------------------------------------------------------- narrow */

@media (max-width:1000px){
  .hero-grid{grid-template-columns:1fr;gap:56px;padding-top:120px}
  .hero{min-height:0}
  .band-q{grid-template-columns:1fr;gap:14px}
}
@media (max-width:760px){
  body{font-size:16px}
  .nav{gap:20px;font-size:14px}
  .head-in{height:58px}
  .hero-h{font-size:12vw;line-height:1}
  .plan{padding:18px 16px 14px}
  .plan{font-size:13.5px}
  .plan-lines li{grid-template-columns:20px 1fr 64px;gap:10px}
  .pl-v{white-space:normal;text-align:right;font-size:11.5px;line-height:1.2}
  .index a{grid-template-columns:1fr;gap:10px;padding:26px 0}
  .index .arr{display:none}
  .note a{grid-template-columns:1fr;gap:10px;padding:28px 0 30px}
  .note time{padding:0}
  .note .arr{display:none}
  .row,.not{grid-template-columns:1fr}
  .row-art .glyph{max-width:300px}
  .prose{font-size:17.5px}
  .foot-in{gap:22px}
  .foot-nav{width:100%;order:3}
}