/* ============================================================
   About · the scroll story
   Section one: the lens.
   ============================================================ */

@font-face{font-family:'Instrument Sans';font-style:normal;font-weight:400;font-display:swap;src:url('../fonts/instrument-sans-latin-400-normal.woff2') format('woff2')}
@font-face{font-family:'Instrument Sans';font-style:normal;font-weight:500;font-display:swap;src:url('../fonts/instrument-sans-latin-500-normal.woff2') format('woff2')}
@font-face{font-family:'Instrument Sans';font-style:normal;font-weight:600;font-display:swap;src:url('../fonts/instrument-sans-latin-600-normal.woff2') format('woff2')}
@font-face{font-family:'Instrument Serif';font-style:italic;font-weight:400;font-display:swap;src:url('../fonts/instrument-serif-latin-400-italic.woff2') format('woff2')}
@font-face{font-family:'JetBrains Mono';font-style:normal;font-weight:400;font-display:swap;src:url('../fonts/jetbrains-mono-latin-400-normal.woff2') format('woff2')}
@font-face{font-family:'JetBrains Mono';font-style:normal;font-weight:500;font-display:swap;src:url('../fonts/jetbrains-mono-latin-500-normal.woff2') format('woff2')}

:root{
  --paper:#FFFFFF; --ink:#14150F; --soft:#84867C; --faint:#B7B8AF;
  --accent:#12608F;
  --sans:"Instrument Sans",system-ui,-apple-system,sans-serif;
  --serif:"Instrument Serif",Georgia,serif;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,monospace;
}

*{box-sizing:border-box}
html{scroll-behavior:auto}
body{margin:0;background:#FFFFFF;color:var(--ink);font-family:var(--sans);
  -webkit-font-smoothing:antialiased;overflow-x:hidden}

/* the grid. light enough to be atmosphere, not paper */
body::before{content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(20,21,15,.042) 1px, transparent 1px),
    linear-gradient(90deg, rgba(20,21,15,.042) 1px, transparent 1px);
  background-size:68px 68px;
  -webkit-mask-image:radial-gradient(118% 94% at 50% 42%, #000 38%, transparent 90%);
  mask-image:radial-gradient(118% 94% at 50% 42%, #000 38%, transparent 90%)}
a{color:inherit}

/* ---- bar ---- */
.ab__bar{position:fixed;top:0;left:0;right:0;z-index:50;display:flex;justify-content:space-between;
  align-items:center;padding:16px 22px;pointer-events:none}
.ab__bar > *{pointer-events:auto}
.ab__home{display:inline-flex;align-items:center;gap:9px;text-decoration:none;font-weight:600;
  font-size:15px;letter-spacing:-.02em;background:rgba(255,255,255,.8);border:1px solid rgba(20,21,15,.09);
  -webkit-backdrop-filter:blur(14px) saturate(150%);backdrop-filter:blur(14px) saturate(150%);
  padding:9px 15px;border-radius:999px}
.ab__home svg{width:13px;height:13px}
.ab__step{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--faint);white-space:nowrap}
.ab__left{display:flex;align-items:center;gap:16px;min-width:0}
.ab__nav{display:flex;align-items:center;gap:20px;background:rgba(255,255,255,.8);
  border:1px solid rgba(20,21,15,.09);border-radius:999px;padding:11px 20px;
  -webkit-backdrop-filter:blur(14px) saturate(150%);backdrop-filter:blur(14px) saturate(150%)}
.ab__nav a{text-decoration:none;font-family:var(--mono);font-size:10.5px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--soft);transition:color .2s ease}
.ab__nav a:hover{color:var(--ink)}
.ab__nav a[aria-current]{color:var(--ink)}
@media (max-width:760px){ .ab__step{display:none} .ab__nav{gap:14px;padding:9px 15px} }

/* ---- the lens act ---- */
.lens-act{position:relative;height:100vh;min-height:620px}
.lens-stage{height:100%;overflow:hidden;display:grid;place-items:center;cursor:none}
.lens-stage.is-out{cursor:auto}

.lens-field{position:relative;width:min(1100px,92vw);height:min(620px,74vh)}

/* the fragments that drift behind everything */
.frag{position:absolute;font-size:clamp(13.5px,1.08vw,16px);line-height:1.3;color:var(--faint);
  letter-spacing:-.005em;white-space:nowrap;will-change:transform,opacity}

/* the headline, twice: plain underneath, magnified inside the glass */
.field-content{position:absolute;inset:0}
.line-wrap{position:absolute;inset:0;display:grid;place-items:center;padding:0 6%}
.line{font-family:var(--sans);font-weight:600;letter-spacing:-.04em;line-height:1.1;
  font-size:clamp(26px,4.3vw,54px);text-align:center;max-width:16ch;text-wrap:balance;
  color:var(--soft);transition:color .4s ease}

/* the glass */
.glass{position:absolute;width:var(--r);height:var(--r);margin:calc(var(--r) / -2) 0 0 calc(var(--r) / -2);
  left:0;top:0;pointer-events:none;will-change:transform,opacity;opacity:0;
  transition:opacity .35s ease}
.glass.is-on{opacity:1}
.glass__clip{position:absolute;inset:0;border-radius:50%;overflow:hidden;
  background:#FCFCFB;
  box-shadow:inset 0 3px 22px rgba(255,255,255,.9),inset 0 -8px 24px rgba(20,21,15,.05),
    0 24px 56px rgba(20,21,15,.12)}
.glass__inner{position:absolute;top:0;left:0;transform-origin:0 0;will-change:transform}
.glass__inner .line{color:var(--ink)}
.glass__inner .frag{color:var(--ink);opacity:.9!important}
.glass__ring{position:absolute;inset:-6%;width:112%;height:112%;overflow:visible}
.glass__ring path,.glass__ring line{fill:none;stroke:var(--ink);stroke-linecap:round;
  stroke-linejoin:round;vector-effect:non-scaling-stroke}

.lens-hint{position:absolute;left:50%;bottom:7vh;transform:translateX(-50%);
  font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--faint);transition:opacity .5s ease;pointer-events:none}
.lens-act.is-moved .lens-hint{opacity:0}

/* ---- the line that carries on ---- */
.thread{display:block;margin:0 auto;height:26vh;overflow:visible}
.thread path{fill:none;stroke:var(--ink);stroke-width:1.6;stroke-linecap:round}

.next{padding:0 0 22vh;text-align:center}
.next p{font-family:var(--serif);font-style:italic;font-size:clamp(20px,2.6vw,30px);
  color:var(--soft);margin:0;letter-spacing:-.02em}

/* ---- reduced motion + phones: no lens, just the words ---- */
@media (prefers-reduced-motion:reduce){
  .lens-act{height:auto}
  .lens-stage{height:auto;padding:22vh 0;cursor:auto}
  .glass{display:none}
  .line{color:var(--ink)}
}
@media (max-width:760px){
  .lens-act{height:auto}
  .lens-stage{height:auto;padding:18vh 22px 10vh;cursor:auto}
  .lens-field{height:auto;width:100%}
  .glass{display:none}
  .lens-hint{display:none}
  .field-content{position:static}
  .line-wrap{position:static;padding:0}
  .line{color:var(--ink);max-width:none;text-align:left}
  .frag{position:static;display:block;white-space:normal;font-size:15px;color:var(--soft);
    margin:0 0 9px;transform:none!important;opacity:1!important}
  .frag-list{margin-top:34px;padding-top:26px;border-top:1px solid rgba(20,21,15,.12)}
  .thread{height:14vh}
}


/* ============================================================
   The ask. Gradient fills the first screen, then settles into a
   band that stays at the top. A box types its own question and a
   dummy cursor clicks the button.
   ============================================================ */

.ask{position:relative;height:100vh;min-height:600px;display:grid;place-items:center}

/* fixed, so it is still there once you have scrolled away */
.grad{position:fixed;top:0;left:0;right:0;z-index:1;pointer-events:none;
  height:var(--gh,100vh);
  background:
    radial-gradient(58% 104% at 14% -6%,  rgba(226, 74,160,.26), rgba(226, 74,160,0) 66%),
    radial-gradient(52% 100% at 46% -8%,  rgba(245,119, 56,.26), rgba(245,119, 56,0) 64%),
    radial-gradient(56% 100% at 82% -6%,  rgba(216,128,196,.15), rgba(216,128,196,0) 68%);
  -webkit-mask-image:linear-gradient(#000 0%,#000 16%,transparent 76%);
  mask-image:linear-gradient(#000 0%,#000 16%,transparent 76%)}

/* grain only inside the gradient, never on the white */
.grad::after{content:"";position:absolute;inset:0;opacity:.34;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns=\'http://www.w3.org/2000/svg\' width=\'180\' height=\'180\'><filter id=\'g\'><feTurbulence type=\'fractalNoise\' baseFrequency=\'.9\' numOctaves=\'3\'/></filter><rect width=\'180\' height=\'180\' filter=\'url(%23g)\' opacity=\'.5\'/></svg>");
  -webkit-mask-image:linear-gradient(#000 0%,#000 34%,transparent 90%);
  mask-image:linear-gradient(#000 0%,#000 34%,transparent 90%)}

.ask__inner{position:relative;z-index:2;width:min(620px,92vw);margin-top:-4vh}

.ask__box{display:flex;align-items:center;gap:15px;background:rgba(255,255,255,.86);
  border:1px solid rgba(20,21,15,.07);border-radius:20px;padding:16px 16px 16px 20px;
  -webkit-backdrop-filter:blur(18px) saturate(140%);backdrop-filter:blur(18px) saturate(140%);
  box-shadow:0 18px 48px rgba(20,21,15,.10),0 2px 6px rgba(20,21,15,.04)}

.ask__spark{flex:none;width:24px;height:24px;display:block}
.ask__rule{flex:none;width:1px;height:22px;background:rgba(20,21,15,.14);margin-left:-3px}

.ask__text{flex:1;font-size:clamp(15px,1.5vw,18px);letter-spacing:-.015em;color:#0E0F0A;
  line-height:1.4;min-height:1.4em;font-weight:500}
.ask__caret{display:inline-block;width:2px;height:1.05em;background:#0E0F0A;
  vertical-align:-.16em;margin-left:2px;animation:blink 1.1s steps(1) infinite}
@keyframes blink{0%,49%{opacity:1}50%,100%{opacity:0}}
.ask.is-done .ask__caret{display:none}

.ask__send{flex:none;width:46px;height:46px;border-radius:50%;border:0;background:#14150F;
  display:grid;place-items:center;cursor:pointer;
  transition:transform .16s ease,box-shadow .2s ease}
.ask__send svg{width:17px;height:17px;stroke:#fff;fill:none;stroke-width:2;
  stroke-linecap:round;stroke-linejoin:round}
.ask__send:hover{transform:translateY(-1px)}
.ask__send.is-hit{transform:scale(.86);box-shadow:0 0 0 10px rgba(20,21,15,.07)}

.ask__note{margin:18px 3px 0;font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;
  text-transform:uppercase;color:#A0A198;transition:opacity .45s ease}
.ask.is-done .ask__note{opacity:0}

/* the dummy cursor: a little film that plays itself */
.auto{position:fixed;left:0;top:0;z-index:70;pointer-events:none;opacity:0;
  transition:opacity .3s ease;will-change:transform}
.auto.is-on{opacity:1}
.auto__arrow{position:absolute;left:0;top:0;width:21px;height:21px;
  transition:opacity .3s ease,transform .5s cubic-bezier(.22,1,.36,1)}
.auto__arrow path{fill:#14150F;stroke:#fff;stroke-width:1.3;stroke-linejoin:round}
.auto__lens{position:absolute;left:0;top:0;width:150px;height:150px;margin:-75px 0 0 -75px;
  opacity:0;transform:scale(.4);
  transition:opacity .45s ease,transform .55s cubic-bezier(.22,1,.36,1)}
.auto__lens circle{fill:rgba(252,252,251,.9);stroke:#14150F;stroke-width:2.4}
.auto__lens line{stroke:#14150F;stroke-width:6;stroke-linecap:round}
.auto.is-lens .auto__arrow{opacity:0;transform:scale(2.2)}
.auto.is-lens .auto__lens{opacity:1;transform:scale(1)}

/* everything below the gradient sits above it */
.lens-act,.thread,.next,.roots,.ab__bar{position:relative;z-index:2}

@media (prefers-reduced-motion:reduce){ .auto{display:none!important} }
@media (max-width:760px){
  .ask{height:auto;padding:24vh 20px 14vh;min-height:0}
  .ask__box{padding:14px 14px 14px 16px;gap:12px}
  .ask__rule{display:none}
  .grad{height:46vh!important}
  .ask__inner{margin-top:0;width:100%}
  .auto{display:none!important}
}


/* ============================================================
   Act two. A line that winds across, drawing itself as you go.
   The stops sit on the curve, found from the path itself.
   ============================================================ */

.jr{position:relative;z-index:2}
.jr__rule{display:none}
.jr__pin{height:100vh;overflow:hidden;position:relative}
.jr__track{position:absolute;left:0;top:0;width:2730px;height:100%;will-change:transform}

/* the band is pinned to the middle of the screen, so the line always
   runs through the centre whatever the window height */
.jr__curve{position:absolute;left:0;top:50%;width:2400px;height:560px;
  margin-top:-280px;overflow:visible}
.jr__curve path{fill:none;stroke:var(--ink);stroke-width:1.6;stroke-linecap:round;
  vector-effect:non-scaling-stroke}

.stop{position:absolute;width:clamp(330px,27vw,420px);margin-left:-165px}
.stop__dot{position:absolute;left:50%;top:0;width:11px;height:11px;margin:-5.5px 0 0 -5.5px;
  border-radius:50%;background:var(--ink)}
.stop__card{position:absolute;left:0;width:100%}
.stop--up   .stop__card{bottom:clamp(30px,5vh,54px)}
.stop--down .stop__card{top:clamp(30px,5vh,54px)}

.stop__no{font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--accent)}
.stop__when{font-family:var(--mono);font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;
  color:var(--faint);margin-left:10px}
.stop__title{font-family:var(--sans);font-weight:600;letter-spacing:-.036em;line-height:1.12;
  font-size:clamp(20px,min(2.35vw,3.7vh),33px);margin:14px 0 0;text-wrap:balance}
.stop__body{margin:10px 0 0;color:var(--soft);font-size:clamp(13.5px,1.05vw,15px);
  line-height:1.5;letter-spacing:-.01em}

/* the live dot the line finishes on */
.stop--end .stop__dot{width:15px;height:15px;margin:-7.5px 0 0 -7.5px;background:#1FA463}
.stop--end .stop__dot::after{content:"";position:absolute;inset:-7px;border-radius:50%;
  border:1.5px solid rgba(31,164,99,.45);animation:ping 2.1s ease-out infinite}
@keyframes ping{0%{transform:scale(.6);opacity:1}100%{transform:scale(1.5);opacity:0}}
.stop--end .stop__title{color:#15724A}

.jr__rail{position:absolute;left:12vw;right:12vw;bottom:4.5vh;height:1.5px;
  background:rgba(20,21,15,.1);border-radius:2px;z-index:3}
.jr__rail span{display:block;height:100%;width:0;background:var(--ink);border-radius:2px}

/* ---- the sign off ---- */
.outro{position:relative;z-index:2;padding:16vh 0 20vh;text-align:center}
.outro__pre{font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--soft);margin:0}
.outro__name{font-family:var(--sans);font-weight:600;letter-spacing:-.05em;line-height:1;
  font-size:clamp(46px,8.4vw,116px);margin:22px 0 0}
.outro__said{font-family:var(--serif);font-style:italic;font-size:clamp(19px,2.3vw,30px);
  color:var(--soft);margin:26px 0 0;line-height:1.4;letter-spacing:-.02em}
.outro__mail{display:inline-flex;align-items:center;gap:9px;margin-top:40px;text-decoration:none;
  font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;
  border:1px solid rgba(20,21,15,.14);border-radius:999px;padding:13px 22px;
  background:rgba(255,255,255,.7);transition:border-color .25s ease,transform .25s ease}
.outro__mail:hover{border-color:rgba(20,21,15,.3);transform:translateY(-2px)}

@media (max-width:860px){
  .jr__pin{height:auto;display:block;overflow:visible;padding:2vh 20px 4vh}
  .jr__track{position:relative;display:block;width:auto!important;height:auto!important;
    transform:none!important;padding-left:30px}
  .jr__curve{display:none}
  .stop{position:static!important;width:auto;margin:0 0 clamp(70px,12vh,120px)}
  .stop:last-child{margin-bottom:0}
  .stop__dot{position:absolute;left:5px;top:auto;margin:6px 0 0 -4.5px}
  .stop__card{position:static;width:auto}
  .jr__rail{display:none}
  .outro{padding:8vh 20px 14vh;text-align:left}

  /* the spine, drawn as you travel down it */
  .jr__rule{display:block;position:absolute;left:5px;top:14px;bottom:14px;width:1.5px;
    background:rgba(20,21,15,.22);transform-origin:top center;transform:scaleY(1)}
  .jr--anim .jr__rule{transform:scaleY(0)}
  .jr--anim .stop{opacity:0;transform:translateY(16px);
    transition:opacity .5s ease,transform .55s cubic-bezier(.22,1,.36,1)}
  .jr--anim .stop.is-in{opacity:1;transform:none}
}

/* ---- phones open straight on the journey ---- */
@media (max-width:760px){
  .ask,.lens-act,.thread{display:none!important}
  .jr__pin{padding-top:128px}
  .grad{height:38vh!important}
}