/* PHI — An Atlas of Modern Thought · SadAge
   Plaster arcade, drowned at dusk: a pale rosy scene behind everything,
   two type voices, flat white pills and discs, no shadows. */

:root{
  --ink:#212121; --paper:#ffffff; --oyster:#faf6f4; --graphite:#424242;
  --blush:#efded9; --plaster:#e6c8c4; --bone:#f1edeb; --lavender:#d4acc6;
  --sky:#d0dafb; --mauve:#927c87; --mist:#d2d6d7; --black:#0a0a0a; --index-dim:#d6d6d6;
  --sans:'Inter Tight',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
  --serif:'Cormorant Garamond',Georgia,Cambria,'Times New Roman',serif;
  --ease:cubic-bezier(.2,.7,.1,1);
  --slow:1.4s;
  --fg:var(--ink);
  --line:color-mix(in srgb,var(--fg) 22%,transparent);--bg:var(--plaster);
  --gutter:clamp(16px,5vw,80px);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--blush);color:var(--fg);font:400 16px/1.15 var(--sans);font-stretch:100%;letter-spacing:-.012em;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;transition:color .9s var(--ease)}
a{color:inherit}
button{font:inherit;color:inherit;letter-spacing:inherit}
img{max-width:100%;display:block}
:focus-visible{outline:1px solid currentColor;outline-offset:4px}
::selection{background:var(--ink);color:var(--oyster)}

.skip{position:fixed;left:16px;top:-80px;z-index:90;padding:12px 18px;border-radius:9999px;background:var(--paper);color:var(--ink);text-decoration:none}
.skip:focus{top:16px}

/* scene layers ───────────────────────────────────── */
#spill,#field{position:fixed;inset:0;width:100%;height:100%;display:block;pointer-events:none;z-index:0}
#grain{position:fixed;inset:-50%;z-index:1;pointer-events:none;opacity:.07;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  animation:grain 1.2s steps(6) infinite}
main{position:relative;z-index:2}

/* type ───────────────────────────────────────────── */
.cap{font:500 11.2px/1.5 var(--sans);letter-spacing:.02em;text-transform:uppercase}
.display{margin:0;font:400 clamp(52px,8vw,100px)/1 var(--sans);letter-spacing:-.016em}
.display .ln-serif{font:italic 300 clamp(64px,9.8vw,124px)/.92 var(--serif);letter-spacing:-.016em}
.display-m{font-size:clamp(44px,6.4vw,96px)}
.display-m .ln-serif{font-size:clamp(56px,8vw,118px)}
.lede{margin:0;font:400 clamp(18px,2vw,24px)/1.3 var(--sans);letter-spacing:-.02em}
.arr{font-style:normal;display:inline-block;transition:transform .6s var(--ease)}

/* reveals (Objects behaviour: blur → focus, masked line rise) */
.js .rv{opacity:0;transform:translateY(22px);filter:blur(10px);
  transition:opacity var(--slow) var(--ease),transform var(--slow) var(--ease),filter var(--slow) var(--ease);transition-delay:var(--d,0s)}
.js .rv.in{opacity:1;transform:none;filter:none}
.lines .ln{display:block;overflow:hidden;padding-bottom:.08em}
.js .lines .ln>span{display:block;transform:translateY(105%);transition:transform 1.5s var(--ease);transition-delay:calc(var(--d,.1s) + var(--i,0) * .18s)}
.js .lines.in .ln>span{transform:none}

/* pills & discs ──────────────────────────────────── */
.pill{position:relative;isolation:isolate;overflow:hidden;display:inline-flex;align-items:center;justify-content:center;gap:10px;
  min-height:41px;padding:0 20px;border:0;border-radius:9999px;font:400 16.8px/.86 var(--sans);letter-spacing:0;text-decoration:none;cursor:pointer}
.pill::before{content:"";position:absolute;z-index:-1;left:50%;top:50%;width:26.4px;height:26.4px;border-radius:50%;
  translate:-50% -50%;scale:0;transition:scale .7s var(--ease)}
.pill:hover::before,.pill:focus-visible::before{scale:12}
.pill:hover .arr{transform:translate(2px,-2px) rotate(0deg)}
.pill-paper{background:var(--paper);color:var(--ink)}
.pill-paper::before{background:var(--ink)}
.pill-paper:hover,.pill-paper:focus-visible{color:var(--paper)}
.pill-ink{background:var(--ink);color:var(--oyster)}
.pill-ink::before{background:var(--paper)}
.pill-ink:hover,.pill-ink:focus-visible{color:var(--ink)}
.pill-outline{background:transparent;color:var(--fg);box-shadow:inset 0 0 0 1px currentColor}
.pill-outline::before{background:var(--fg)}
.pill-outline:hover,.pill-outline:focus-visible{color:var(--bg)}

.disc{display:inline-grid;place-items:center;width:43.2px;height:43.2px;margin:8px;padding:0;border:0;border-radius:50%;
  background:var(--paper);color:var(--ink);font:400 20px/1 var(--sans);text-decoration:none;cursor:pointer;transition:background .5s var(--ease),color .5s var(--ease)}
.disc:hover{background:var(--ink);color:var(--paper)}
.disc svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.2}
.dots{position:relative;width:14px;height:4px}
.dots::before,.dots::after{content:"";position:absolute;top:0;width:4px;height:4px;border-radius:50%;background:currentColor;transition:all .5s var(--ease)}
.dots::before{left:0}.dots::after{right:0}
.menu-open #menu-btn{background:var(--ink);color:var(--paper)}
.menu-open .dots::before,.menu-open .dots::after{top:1px;left:0;right:auto;width:14px;height:1.4px;border-radius:0}
.menu-open .dots::before{rotate:45deg}.menu-open .dots::after{rotate:-45deg}

/* chrome ─────────────────────────────────────────── */
.chrome{position:fixed;z-index:40;opacity:0;pointer-events:none;transition:opacity 2s var(--ease) .4s,color .9s var(--ease)}
.entered .chrome{opacity:1;pointer-events:auto}
.chrome-top{top:0;left:0;right:0;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 16px 0 24px;pointer-events:none}
.entered .chrome-top{pointer-events:none}
.chrome-top>*{pointer-events:auto}
.wordmark{font:500 19.2px/1 var(--sans);letter-spacing:-.02em;text-decoration:none}
.wordmark span{font:italic 300 22px/1 var(--serif)}
.toplinks{display:flex;gap:4px;margin-left:auto}
.swap{display:inline-flex;padding:2.4px 12px;font:400 19.2px/1.1 var(--sans);letter-spacing:0;text-decoration:none}
.sw{position:relative;display:inline-block;overflow:hidden;vertical-align:top}
.sw-a,.sw-b{display:block;white-space:nowrap}
.sw-b{position:absolute;left:0;top:0;font:italic 300 20.8px/1.1 var(--serif);letter-spacing:0}
.sw i{display:inline-block;font-style:inherit;transition:transform .55s var(--ease);transition-delay:calc(var(--i) * 24ms)}
.sw-b i{transform:translateY(110%)}
.swap:hover .sw-a i,.swap:focus-visible .sw-a i,.swap[aria-current] .sw-a i{transform:translateY(-110%)}
.swap:hover .sw-b i,.swap:focus-visible .sw-b i,.swap[aria-current] .sw-b i{transform:none}
.chrome-bottom{left:0;right:0;bottom:0;display:flex;align-items:center;justify-content:space-between;padding:0 16px 14px 24px;pointer-events:none}
.entered .chrome-bottom{pointer-events:none}
.chrome-bottom>*{pointer-events:auto}
.disc-globe{position:absolute;left:50%;bottom:6px;translate:-50% 0}
.copy{font:400 12.8px/1 var(--sans);letter-spacing:-.02em}
#rail{right:10px;top:50%;translate:0 -50%;width:1px;height:34vh;background:var(--line)}
#rail i{position:absolute;left:-1px;top:0;width:3px;height:0;background:var(--fg);transition:height .6s var(--ease)}

/* side menu */
.menu{position:fixed;top:0;right:0;bottom:0;z-index:45;width:min(656px,100vw);padding:132.8px 40px 48px 100px;
  background:var(--bone);color:var(--ink);overflow:auto;transform:translateX(100%);transition:transform 1s var(--ease);display:flex;flex-direction:column}
.menu.open{transform:none}
.menu ol{list-style:none;margin:0;padding:0}
.menu a{text-decoration:none}
.menu ol a{display:inline-block;font:300 clamp(56px,7.6vw,108px)/1 var(--serif);letter-spacing:-.016em;transition:font-style .3s}
.menu ol a:hover{font-style:italic}
.menu sup{font:300 22px/1 var(--serif);margin-left:6px;vertical-align:top;position:relative;top:.4em}
.menu a[aria-current]{color:var(--index-dim);text-decoration:underline;text-decoration-thickness:4px;text-underline-offset:10px}
.menu-foot{margin-top:auto;padding-top:40px;font:400 12.8px/1.4 var(--sans)}

/* gate ───────────────────────────────────────────── */
.gate{position:fixed;inset:0;z-index:80;display:grid;place-items:center;padding:24px;background:var(--blush);color:var(--graphite);
  transition:opacity 1.4s var(--ease),filter 1.4s var(--ease),transform 1.4s var(--ease)}
.gate.out{opacity:0;filter:blur(12px);transform:scale(1.04);pointer-events:none}
.gate-col{display:flex;flex-direction:column;align-items:center;gap:18px;text-align:center;max-width:360px}
.phi-mark{width:92px;height:92px;fill:none;stroke:var(--ink);stroke-width:1.4}
.phi-mark circle{stroke-dasharray:189;stroke-dashoffset:189;transition:stroke-dashoffset 2.2s var(--ease) .2s}
.phi-mark path{stroke-dasharray:92;stroke-dashoffset:92;transition:stroke-dashoffset 1.6s var(--ease) .9s}
.phi-mark.in circle,.phi-mark.in path{stroke-dashoffset:0}
.gate-title{margin:6px 0 0;font:400 18px/1.5 var(--sans);letter-spacing:-.022em;text-transform:uppercase;color:var(--ink)}
.gate-tag{margin:0;font:400 16px/1.15 var(--sans);letter-spacing:-.025em}
.still-link{margin-top:10px;background:none;border:0;padding:6px;font:500 11.2px/1.5 var(--sans);letter-spacing:.02em;text-transform:uppercase;text-decoration:underline;text-underline-offset:3px;cursor:pointer}
.hush{position:absolute;left:50%;top:50%;width:8px;height:8px;margin:-4px;border-radius:50%;background:var(--ink);animation:breathe 2.4s var(--ease) infinite;transition:opacity .8s}
.gate.awake .hush{animation:none;opacity:0;transform:scale(.2)}
body.gated{overflow:hidden}

/* atlas ──────────────────────────────────────────── */
.room{position:relative;padding:160px var(--gutter)}
#atlas{padding-top:0}
.hero{min-height:100svh;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:28px;text-align:center;padding:120px 0 80px}
.hero .lede{max-width:440px}
.field-wrap{position:relative;width:min(1040px,100%);margin:0 auto}
.field{width:100%;aspect-ratio:1/1;touch-action:pan-y}
.core{position:absolute;left:50%;top:50%;width:26%;translate:-50% -50%;text-align:center;background:none;border:0;padding:12px;cursor:pointer;color:var(--ink)}
.core .cap{display:block;opacity:.7}
.core-q{display:block;margin-top:10px;font:italic 300 clamp(26px,3.8vw,50px)/.98 var(--serif);letter-spacing:-.016em}

.labels{position:fixed;inset:0;z-index:30;pointer-events:none;opacity:0;transition:opacity .9s var(--ease)}
.labels.on{opacity:1}
.labels.on .wlabel{pointer-events:auto}
.wlabel{position:absolute;left:0;top:0;white-space:nowrap;display:inline-flex;align-items:center;gap:6px;height:25.2px;padding:0 12px;
  border:0;border-radius:200px;background:var(--paper);color:var(--ink);font:400 12.8px/1 var(--sans);letter-spacing:-.028em;cursor:pointer;
  transition:background .4s var(--ease),color .4s var(--ease),opacity .6s;will-change:transform}
.wlabel b{font-weight:500;font-variant-numeric:tabular-nums}
.wlabel small{font-size:10px;opacity:.7}
.wlabel:hover,.wlabel.is-hot{background:var(--lavender)}
.wlabel[aria-pressed="true"]{background:var(--ink);color:var(--oyster)}
.wlabel.is-dim{opacity:.32}
.tip{position:fixed;left:0;top:0;z-index:35;max-width:290px;padding:12px 14px 13px;pointer-events:none;background:var(--paper);color:var(--ink)}
.tip .cap{display:block;opacity:.6}
.tip p{margin:6px 0 0;font:400 15px/1.3 var(--sans);letter-spacing:-.01em}

.float{position:absolute;z-index:3}
.float>*{animation:drift 9s ease-in-out infinite alternate}
.f-quote{left:0;top:3%;width:22%}
.f-quote p{margin:8px 0 0;font:italic 300 30px/1 var(--serif);letter-spacing:-.01em}
.f-link{right:0;top:5%;width:22%;padding:16px 18px;background:var(--paper);color:var(--ink);text-decoration:none}
.f-link .cap{display:block;opacity:.6}
.f-link-t{display:block;margin-top:8px;font:400 16px/1.15 var(--sans)}
.f-note{left:0;bottom:5%;width:22%;padding:16px 18px;box-shadow:inset 0 0 0 1px var(--line)}
.f-note p{margin:8px 0 0;font:400 16px/1.15 var(--sans)}
.f-count{right:0;bottom:3%;width:22%;text-align:right}
.f-count-n{font:italic 300 clamp(64px,8vw,100px)/.9 var(--serif);letter-spacing:-.016em}

.threads{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin:40px auto 0;max-width:820px}
.filter{display:inline-flex;align-items:baseline;gap:6px;height:25.2px;padding:5.2px 14px;border:0;border-radius:200px;background:transparent;
  box-shadow:inset 0 0 0 1px var(--line);font:400 12.8px/1 var(--sans);letter-spacing:-.028em;cursor:pointer;transition:background .4s,color .4s,box-shadow .4s}
.filter small{font-size:10px}
.filter:hover{box-shadow:inset 0 0 0 1px var(--ink)}
.filter[aria-pressed="true"]{background:var(--ink);color:var(--oyster);box-shadow:none}
.hint{margin:22px auto 0;max-width:520px;text-align:center;font:400 12.8px/1.5 var(--sans);letter-spacing:-.01em;opacity:.75}

/* work in focus ──────────────────────────────────── */
.focus-grid{display:grid;grid-template-columns:minmax(200px,auto) minmax(0,600px) minmax(220px,360px);gap:56px;align-items:start;max-width:1280px;margin:0 auto}
.focus-num{display:flex;flex-direction:column;gap:12px}
.big-num{font:italic 300 clamp(140px,18vw,260px)/.8 var(--serif);letter-spacing:-.03em;font-variant-numeric:tabular-nums}
.nav-row{display:flex;align-items:center;gap:0;margin-left:-8px}
.nav-row .cap{margin-left:8px}
.focus-body{display:flex;flex-direction:column;gap:22px}
.js .focus-body.swapping,.js .portrait-shape.swapping img{opacity:0;filter:blur(8px);transform:translateY(8px)}
.focus-body>*{transition:opacity .5s var(--ease),filter .5s var(--ease),transform .5s var(--ease)}
.js .focus-body.swapping>*{opacity:0;filter:blur(8px);transform:translateY(8px)}
.js .focus-body.swapping{opacity:1;filter:none;transform:none}
.sel-author{font:400 clamp(40px,5vw,64px)/1.2 var(--sans);letter-spacing:-.02em}
.sel-title{margin:-10px 0 0;font:italic 300 clamp(42px,5vw,68px)/.98 var(--serif);letter-spacing:-.016em}
.sel-sum{margin:0;font:400 clamp(19px,1.8vw,24px)/1.3 var(--sans);letter-spacing:-.02em}
.points{list-style:none;margin:0;padding:0;counter-reset:pt}
.points li{display:grid;grid-template-columns:40px 1fr;padding:14px 0;border-top:1px solid var(--line);font:400 16px/1.3 var(--sans);counter-increment:pt}
.points li:last-child{border-bottom:1px solid var(--line)}
.points li::before{content:"0" counter(pt);font:italic 300 20.8px/.9 var(--serif)}
.tags{display:flex;flex-wrap:wrap;gap:6px}
.tag{display:inline-flex;align-items:center;height:25.2px;padding:5.2px 14px;border-radius:200px;background:var(--ink);color:var(--oyster);font:400 12.8px/1 var(--sans);letter-spacing:-.028em}
.tag.thread{background:none;color:var(--ink);box-shadow:inset 0 0 0 1px var(--line)}
.actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:4px}

.portrait{margin:0;display:flex;flex-direction:column;gap:12px;padding-top:24px}
.portrait-shape{position:relative;aspect-ratio:4/5;overflow:hidden;background:var(--plaster)}
.portrait-shape img{width:100%;height:100%;object-fit:cover;filter:grayscale(1) contrast(1.05);mix-blend-mode:multiply;
  transition:opacity .6s var(--ease),filter .6s var(--ease),transform 1.2s var(--ease)}
.portrait-shape.is-plate{display:grid;place-items:center;background:var(--lavender)}
.portrait-shape.is-plate img{display:none}
.portrait-shape.is-plate::after{content:attr(data-initials);font:italic 300 clamp(90px,9vw,150px)/.8 var(--serif);color:var(--ink)}
.portrait .cap{opacity:.7;text-transform:none;letter-spacing:-.01em;font-size:12.8px;font-weight:400}

/* end of preview */
.preview-end{min-height:100svh;display:flex;flex-direction:column;justify-content:center;gap:28px;padding-bottom:200px}
.preview-end .lede{max-width:520px}

/* toast */
.toast{position:fixed;left:50%;bottom:72px;z-index:70;translate:-50% 0;max-width:calc(100% - 32px);padding:13px 20px;border-radius:9999px;
  background:var(--paper);color:var(--ink);font:400 14px/1.3 var(--sans);text-align:center}

/* ring cursor */
#cursor{position:fixed;left:0;top:0;z-index:100;pointer-events:none;display:none}
#cursor .ring{position:absolute;left:0;top:0;width:35.2px;height:35.2px;margin:-17.6px;border:1px solid var(--fg);border-radius:19.2px;transition:border-color .5s,width .4s var(--ease),height .4s var(--ease),margin .4s var(--ease)}
#cursor .pt{position:absolute;left:0;top:0;width:4px;height:4px;margin:-2px;border-radius:50%;background:var(--fg)}
#cursor.hot .ring{width:56px;height:56px;margin:-28px;border-radius:28px}
@media (pointer:fine){
  .cursor-on #cursor{display:block}
  .cursor-on,.cursor-on a,.cursor-on button{cursor:none}
}

/* motion keyframes ───────────────────────────────── */
@keyframes grain{0%,100%{transform:translate(0,0)}20%{transform:translate(-3%,2%)}40%{transform:translate(2%,-3%)}60%{transform:translate(-2%,-1%)}80%{transform:translate(3%,3%)}}
@keyframes breathe{0%,100%{opacity:.15;transform:scale(.6)}50%{opacity:.9;transform:scale(1.4)}}
@keyframes drift{to{translate:8px -16px;rotate:1.5deg}}

/* still mode: system setting or "Enter without motion" */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition-duration:.01ms!important;transition-delay:0s!important}
}
.still,.still *{scroll-behavior:auto}
.still *,.still *::before,.still *::after{animation:none!important;transition-duration:.01ms!important;transition-delay:0s!important}

/* responsive ─────────────────────────────────────── */
@media (max-width:1100px){
  .focus-grid{grid-template-columns:auto minmax(0,1fr)}
  .portrait{grid-column:1/-1;max-width:360px}
}
@media (max-width:760px){
  .toplinks,.copy{display:none}
  .chrome-top{padding-left:16px}
  .room{padding:120px var(--gutter)}
  .field-wrap{display:grid;grid-template-columns:1fr 1fr;gap:16px}
  .field{grid-column:1/-1}
  .float{position:static;width:auto}
  .f-count{text-align:left}
  .core{top:0;translate:-50% 0;margin-top:calc(50% - 40px);width:46%}
  .wlabel{height:22px;padding:0 8px;font-size:11px}
  .wlabel small{display:none}
  .focus-grid{grid-template-columns:1fr;gap:32px}
  .big-num{font-size:150px}
  .menu{padding:110px 24px 32px 32px}
}