/* Recursively Curious, Quiet Craft design system */
:root{
  --bg:#f6f6f3; --bg-soft:#efefe9; --ink:#16181c; --ink-soft:#5a5e66; --ink-faint:#9aa0a8;
  --line:#e3e3dc; --card:#fcfcfa; --accent:#e0573e; --accent-soft:#fbe7e1;
  --shadow:0 1px 2px rgba(20,22,25,.04),0 8px 24px -16px rgba(20,22,25,.18);
  --sky:linear-gradient(180deg,#add0f0,#e8f4fb);
  --transition:.55s cubic-bezier(.4,0,.2,1);
  --font:'Hanken Grotesk',system-ui,sans-serif;
}
[data-theme="dark"]{
  --bg:#0f1113; --bg-soft:#15181b; --ink:#eef0f2; --ink-soft:#a4abb3; --ink-faint:#646b73;
  --line:#23272b; --card:#15181b; --accent:#ff7a5c; --accent-soft:#2a1a14;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 12px 40px -20px rgba(0,0,0,.8);
  --sky:linear-gradient(180deg,#0b1733,#16203d);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;overflow-x:hidden;overflow-x:clip}
body{background:var(--bg);color:var(--ink);font-family:var(--font);line-height:1.55;
  -webkit-font-smoothing:antialiased;transition:background var(--transition),color var(--transition);
  overflow-x:hidden;overflow-x:clip}
a{color:inherit;text-decoration:none}
.wrap{max-width:760px;margin:0 auto;padding:0 28px}

/* nav */
nav{max-width:760px;margin:0 auto;padding:28px;display:flex;align-items:center;justify-content:space-between}
.logo{font-weight:700;font-size:16px;letter-spacing:-.01em;position:relative;display:inline-block}
.logo .echo{position:absolute;inset:0;color:var(--accent);opacity:0;transition:.4s;pointer-events:none}
.logo:hover .e1{opacity:.18;transform:translate(2.5px,2.5px)}
.logo:hover .e2{opacity:.1;transform:translate(5px,5px)}

/* day/night toggle */
.toggle{width:62px;height:30px;border-radius:999px;border:none;cursor:pointer;position:relative;
  background:var(--sky);overflow:hidden;transition:background var(--transition);box-shadow:inset 0 0 0 1px rgba(0,0,0,.06)}
.toggle .orb{position:absolute;top:3px;left:3px;width:24px;height:24px;border-radius:50%;
  background:radial-gradient(circle at 35% 30%,#fff6c8,#ffd23f 70%);box-shadow:0 0 10px #ffd23f88;
  transition:transform var(--transition),background var(--transition),box-shadow var(--transition);z-index:3}
[data-theme="dark"] .toggle .orb{transform:translateX(32px);background:radial-gradient(circle at 38% 32%,#fff,#cfd6e0 70%);box-shadow:0 0 8px #ffffff55}
.toggle .orb:before,.toggle .orb:after{content:"";position:absolute;border-radius:50%;background:#aab3c0;opacity:0;transition:opacity var(--transition)}
.toggle .orb:before{width:6px;height:6px;top:5px;left:6px}
.toggle .orb:after{width:4px;height:4px;bottom:5px;right:6px}
[data-theme="dark"] .toggle .orb:before,[data-theme="dark"] .toggle .orb:after{opacity:.5}
.toggle .stars{position:absolute;inset:0;opacity:0;transition:opacity var(--transition)}
[data-theme="dark"] .toggle .stars{opacity:1}
.toggle .stars i{position:absolute;width:2px;height:2px;border-radius:50%;background:#fff;animation:twinkle 2.6s infinite}
.toggle .stars i:nth-child(1){top:8px;left:10px;animation-delay:.1s}
.toggle .stars i:nth-child(2){top:16px;left:18px;animation-delay:.9s}
.toggle .stars i:nth-child(3){top:6px;left:22px;animation-delay:1.6s}
@keyframes twinkle{0%,100%{opacity:.3}50%{opacity:1}}
.toggle .cloud{position:absolute;top:8px;left:30px;width:16px;height:6px;border-radius:999px;background:#fff;opacity:.85;transition:opacity var(--transition),transform var(--transition)}
.toggle .cloud:before{content:"";position:absolute;top:-4px;left:4px;width:9px;height:9px;border-radius:50%;background:#fff}
[data-theme="dark"] .toggle .cloud{opacity:0;transform:translateX(10px)}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:9px;background:var(--ink);color:var(--bg);font-weight:600;
  font-size:15px;padding:13px 22px;border-radius:11px;transition:.25s;box-shadow:var(--shadow);cursor:pointer}
.btn:hover{transform:translateY(-2px)}
.btn.ghost{background:transparent;color:var(--ink);box-shadow:inset 0 0 0 1.5px var(--line)}
.btn.ghost:hover{box-shadow:inset 0 0 0 1.5px var(--accent);color:var(--accent)}
.btn .ar{transition:transform .25s}
.btn:hover .ar{transform:translateX(3px)}

/* shared text bits */
.rule{height:1px;background:var(--line);margin:56px 0;border:none;transition:background var(--transition)}
.eyebrow{font-size:13px;letter-spacing:.04em;color:var(--ink-soft);font-weight:500;margin-bottom:22px}
.eyebrow b{color:var(--accent);font-weight:600}
.sec-label{font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-faint);font-weight:600;margin-bottom:6px}
.sec-intro{font-size:18px;color:var(--ink-soft);max-width:50ch;margin-bottom:30px}

/* ---------- HOMEPAGE ---------- */
.hero{padding-top:54px;padding-bottom:30px}
h1{font-size:clamp(34px,5.2vw,50px);line-height:1.08;letter-spacing:-.025em;font-weight:800;max-width:15ch}
h1 .soft{color:var(--ink-soft);font-weight:700}
.uline{position:relative;white-space:nowrap}
.uline svg{position:absolute;left:-2%;width:104%;bottom:-.16em;height:.4em;overflow:visible}
.uline svg path{stroke:var(--accent);stroke-width:2.2;fill:none;stroke-linecap:round;
  stroke-dasharray:260;stroke-dashoffset:260;animation:draw 1.1s cubic-bezier(.6,0,.4,1) 1s forwards}
@keyframes draw{to{stroke-dashoffset:0}}
.lede{font-size:clamp(17px,2.1vw,20px);color:var(--ink-soft);max-width:48ch;margin-top:24px;line-height:1.6}
.why{margin-top:26px;display:inline-flex;align-items:center;gap:8px;font-size:15px;color:var(--ink-soft);
  cursor:pointer;border:none;background:none;font-family:inherit;transition:.25s}
.why:hover{color:var(--accent)}
.why .arc{display:inline-block;transition:transform .5s cubic-bezier(.4,0,.2,1)}
.why.spun .arc{transform:rotate(360deg)}
.why-deeper{max-width:48ch;overflow:hidden;max-height:0;opacity:0;
  transition:max-height .5s ease,opacity .5s ease,margin .5s ease;color:var(--ink-soft);font-size:16px;line-height:1.65}
.why-deeper.open{max-height:200px;opacity:1;margin-top:16px}
.why-deeper .acc{color:var(--accent);font-style:italic}
.cta{margin-top:34px}

.steps{display:flex;flex-direction:column;gap:4px}
.step{display:flex;gap:22px;align-items:flex-start;padding:18px 0}
.step .n{font-size:32px;font-weight:800;color:var(--accent);line-height:1;flex:none;width:42px;opacity:.9;letter-spacing:-.03em}
.step h4{font-size:20px;font-weight:700;letter-spacing:-.01em}
.step p{color:var(--ink-soft);font-size:16px;margin-top:5px;max-width:52ch}

.group-label{font-size:13px;font-weight:700;letter-spacing:.03em;color:var(--ink);margin:30px 0 4px}
.group-label:first-of-type{margin-top:0}
.proof-list{display:flex;flex-direction:column}
.item{display:flex;align-items:baseline;gap:18px;padding:18px 16px;margin:0 -16px;border-radius:12px;
  position:relative;transition:background .3s;cursor:pointer}
.item:hover{background:var(--card);box-shadow:var(--shadow)}
.item .dot{flex:none;width:7px;height:7px;border-radius:50%;background:var(--ink-faint);margin-top:9px;transition:.3s}
.item:hover .dot{background:var(--accent);transform:scale(1.4)}
.item .body{flex:1}
.item .head{display:flex;align-items:baseline;gap:12px;flex-wrap:wrap}
.item h3{font-size:21px;font-weight:700;letter-spacing:-.02em}
.item .tag{font-size:12px;color:var(--ink-faint);font-weight:500}
.item .desc{color:var(--ink-soft);font-size:15.5px;margin-top:3px;max-width:54ch}
.item .outcome{max-height:0;overflow:hidden;opacity:0;color:var(--ink-soft);font-size:13.5px;
  transition:max-height .35s ease,opacity .35s ease,margin .35s ease;display:flex;align-items:center;gap:8px}
.item .outcome b{color:var(--accent);font-weight:600}
.item:hover .outcome{max-height:48px;opacity:1;margin-top:9px}
.item .go{flex:none;color:var(--ink-faint);opacity:0;transform:translateX(-6px);transition:.3s;align-self:center}
.item:hover .go{opacity:1;transform:translateX(0);color:var(--accent)}

.about p{font-size:17px;color:var(--ink-soft);max-width:56ch;margin-top:14px;line-height:1.7}
.about p:first-of-type{margin-top:0}
.sign{margin-top:22px;font-style:italic;font-size:18px;color:var(--ink);font-weight:500}

.end{padding-top:24px;padding-bottom:30px;text-align:center}
.end h2{font-size:clamp(24px,3.6vw,34px);font-weight:800;letter-spacing:-.02em;max-width:22ch;margin:0 auto;line-height:1.18}
.end p{color:var(--ink-soft);margin:16px auto 0;max-width:44ch}
.end .btn{margin-top:26px}

/* ---------- DETAIL PAGES ---------- */
.back{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--ink-soft);
  margin:8px 0 30px;transition:.25s}
.back:hover{color:var(--accent);gap:11px}
.post-hero{padding:6px 0 12px}
.post-hero h1{font-size:clamp(36px,6vw,58px);line-height:1.04;max-width:16ch}
.post-hero .what{font-size:clamp(18px,2.2vw,21px);color:var(--ink-soft);max-width:50ch;margin-top:18px;line-height:1.6}
.post-meta{display:flex;gap:14px;flex-wrap:wrap;margin-top:24px;font-size:13px;color:var(--ink-faint)}
.post-meta .pill{display:inline-flex;align-items:center;gap:7px;padding:5px 12px;border-radius:999px;
  background:var(--card);box-shadow:inset 0 0 0 1px var(--line);font-weight:500}
.post-meta .pill .led{width:7px;height:7px;border-radius:50%;background:var(--accent)}

/* story beats */
.beat{padding:6px 0 2px;margin-top:44px}
.beat .label{font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);font-weight:600;margin-bottom:10px}
.beat h2{font-size:clamp(22px,3vw,28px);font-weight:800;letter-spacing:-.02em;max-width:20ch}
.beat p{font-size:17px;color:var(--ink-soft);line-height:1.75;max-width:58ch;margin-top:12px}
.beat p + p{margin-top:14px}

/* visual preview frame */
.preview{margin:40px 0 8px;border-radius:18px;background:var(--bg-soft);box-shadow:inset 0 0 0 1px var(--line);
  overflow:hidden;position:relative}
.preview .bar{display:flex;gap:6px;padding:13px 16px;border-bottom:1px solid var(--line)}
.preview .bar i{width:10px;height:10px;border-radius:50%;background:var(--line)}
.preview .stage{padding:46px 30px;min-height:240px;display:flex;flex-direction:column;align-items:center;
  justify-content:center;gap:14px;text-align:center}
.preview .glyph{font-size:48px;line-height:1}
.preview .cap{font-size:14px;color:var(--ink-faint);max-width:40ch}

/* invitation */
.invite{margin-top:48px;text-align:center;padding:46px 28px;border-radius:18px;background:var(--card);box-shadow:var(--shadow)}
.invite h2{font-size:clamp(22px,3vw,30px);font-weight:800;letter-spacing:-.02em;max-width:22ch;margin:0 auto;line-height:1.2}
.invite p{color:var(--ink-soft);margin:14px auto 0;max-width:42ch}
.invite .btn{margin-top:24px}

/* tech footnote */
.footnote{margin-top:40px;border-top:1px solid var(--line);padding-top:22px}
.footnote summary{cursor:pointer;font-size:14px;color:var(--ink-soft);font-weight:600;list-style:none;
  display:inline-flex;align-items:center;gap:9px;transition:.25s}
.footnote summary:hover{color:var(--accent)}
.footnote summary::-webkit-details-marker{display:none}
.footnote summary .chev{transition:transform .3s}
.footnote[open] summary .chev{transform:rotate(90deg)}
.footnote .inner{font-size:15px;color:var(--ink-soft);line-height:1.7;margin-top:16px;max-width:58ch}
.footnote .inner code{font-family:ui-monospace,monospace;font-size:13px;background:var(--bg-soft);padding:2px 6px;border-radius:5px}
.footnote .inner ul{margin:10px 0 0;padding-left:18px}
.footnote .inner li{margin:5px 0}

footer{padding:50px 0;text-align:center;font-size:13px;color:var(--ink-faint)}
footer .heart{color:var(--accent)}
.heart{cursor:default}

/* whimsy */
.rise{opacity:0;transform:translateY(14px);transition:opacity .7s cubic-bezier(.2,.6,.2,1),transform .7s cubic-bezier(.2,.6,.2,1)}
.rise.in{opacity:1;transform:none}
.niblet{position:fixed;left:-100px;bottom:13%;width:64px;height:auto;z-index:50;pointer-events:none;
  opacity:0;filter:drop-shadow(0 4px 8px rgba(224,87,62,.28))}
.niblet.swim{animation:swim 10s cubic-bezier(.45,.05,.55,.95) forwards}
@keyframes swim{
  0%{opacity:0;transform:translateX(0) translateY(0)}
  7%{opacity:1}
  20%{transform:translateX(24vw) translateY(-30px)}
  38%{transform:translateX(44vw) translateY(8px)}
  55%{transform:translateX(60vw) translateY(-4px)}
  72%{transform:translateX(78vw) translateY(-22px)}
  93%{opacity:1}
  100%{opacity:0;transform:translateX(112vw) translateY(0)}
}
.niblet .fish{transform-origin:center;animation:bob 1.9s ease-in-out infinite}
@keyframes bob{0%,100%{transform:rotate(-2.5deg) translateY(0)}50%{transform:rotate(2.5deg) translateY(1px)}}
.niblet .tail{transform-origin:50px 30px;animation:wag .58s ease-in-out infinite}
@keyframes wag{0%,100%{transform:rotate(-10deg) scaleX(.92)}50%{transform:rotate(10deg) scaleX(1)}}
.niblet .fin-top{transform-origin:50px 22px;animation:flutter .9s ease-in-out infinite}
.niblet .fin-pec{transform-origin:52px 36px;animation:flutter .7s ease-in-out infinite}
@keyframes flutter{0%,100%{transform:rotate(-3deg)}50%{transform:rotate(5deg)}}
.niblet .pupil,.niblet .eyew,.niblet .glint{transform-origin:60px 27px;animation:blink 4s infinite}
@keyframes blink{0%,95%,100%{transform:scaleY(1)}97.5%{transform:scaleY(.08)}}
.niblet .bub{opacity:0;transform-origin:center;animation:bubble 2.6s ease-out infinite}
.niblet .bub.b2{animation-delay:.9s}.niblet .bub.b3{animation-delay:1.7s}
@keyframes bubble{0%{opacity:0;transform:translate(0,0) scale(.4)}15%{opacity:.65}100%{opacity:0;transform:translate(18px,-26px) scale(1)}}
.spark{position:absolute;width:4px;height:4px;border-radius:50%;background:var(--accent);pointer-events:none;opacity:0}
.spark.go{animation:spark .6s ease-out forwards}
@keyframes spark{0%{opacity:1;transform:translate(0,0) scale(1)}100%{opacity:0;transform:translate(var(--dx),var(--dy)) scale(.2)}}

/* touch devices have no hover: reveal the payoff content that's hover-gated on desktop */
@media (hover: none){
  .item .outcome{max-height:80px;opacity:1;margin-top:9px}
  .item .dot{background:var(--accent)}
  .item .go{display:none}
}

/* consolidated mobile pass: comfortable gutters, calmer vertical rhythm */
@media (max-width:600px){
  .wrap{padding:0 24px}
  nav{padding:18px 24px}
  .rule{margin:40px 0}
  .item .go{display:none}
  /* small screens are touch-first: show the payoff lines without hover */
  .item .outcome{max-height:80px;opacity:1;margin-top:9px}
  .item .dot{background:var(--accent)}
  .step{gap:16px}
  .step .n{width:34px;font-size:27px}
  /* homepage rhythm */
  .hero{padding-top:20px;padding-bottom:24px}
  .lede{margin-top:20px}
  .end{padding-top:18px;padding-bottom:24px}
  /* detail-page rhythm */
  .beat{margin-top:32px}
  .preview{margin:30px 0 8px}
  .preview .stage{padding:36px 22px;min-height:200px}
  .invite{margin-top:36px;padding:36px 22px}
  .footnote{margin-top:32px}
}
@media (prefers-reduced-motion: reduce){
  .uline svg path{animation:none;stroke-dashoffset:0}
  .rise{opacity:1;transform:none;transition:none}
  .niblet,.niblet.swim{display:none}
  .toggle .orb,*{transition-duration:.001ms !important;animation:none !important}
}