:root{--bg:#FBFAFD;--card:#fff;--navy:#1E2370;--blue:#1F2F96;--red:#E2323F;--violet:#6A3D9E;
--lav:#B9B7DC;--pink:#F3A6AE;--ink:#22243A;--muted:#5D6080;--line:#E7E6F2}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:400 18px/1.75 Rubik,Heebo,system-ui,sans-serif}
a{color:var(--blue)}
.wrap{max-width:680px;margin:0 auto;padding:0 18px 40px}
header.top{display:flex;align-items:center;justify-content:space-between;padding:16px 0 8px}
.brand{font:800 26px/1 Heebo,Rubik,sans-serif;color:var(--navy);text-decoration:none}
.brand b{color:var(--red);font-family:Rubik}
.issue-tag{font-size:14px;color:var(--muted)}
.hero{margin:10px 0 18px}
.hero h1{font:800 30px/1.25 Rubik;color:var(--navy);margin:6px 0}
.hero p{margin:0;color:var(--muted)}
video{width:100%;max-height:72vh;border-radius:18px;background:#000;display:block;margin:14px auto}
.cards{list-style:none;padding:0;margin:0;display:grid;gap:12px}
.card a{display:flex;gap:14px;align-items:center;background:var(--card);border:1px solid var(--line);
border-radius:18px;padding:14px 16px;text-decoration:none;color:inherit;min-height:84px}
.card a:active{transform:scale(.99)}
.num{font:800 34px/1 Rubik;background:linear-gradient(135deg,var(--navy),var(--violet) 55%,var(--red));
-webkit-background-clip:text;background-clip:text;color:transparent;min-width:52px;text-align:center}
.card h2{font:700 18px/1.35 Rubik;color:var(--blue);margin:0}
.card p{margin:2px 0 0;font-size:15px;line-height:1.45;color:var(--red)}
.chip{display:inline-block;font-size:12px;line-height:1;padding:6px 10px;border-radius:99px;background:#EEEDF8;color:var(--navy);margin-bottom:6px}
article .bignum{font:800 72px/1 Rubik;background:linear-gradient(135deg,var(--navy),var(--violet) 55%,var(--red));
-webkit-background-clip:text;background-clip:text;color:transparent}
article h1{font:800 28px/1.3 Rubik;color:var(--blue);margin:8px 0 6px}
article .sub{display:inline-block;background:var(--red);color:#fff;font-weight:700;border-radius:14px;padding:8px 14px;line-height:1.4}
article h3{font:700 19px/1.4 Rubik;color:var(--navy);margin:26px 0 4px}
article p{margin:0 0 10px}
.sources{border-top:1px solid var(--line);margin-top:26px;padding-top:12px;font-size:15px}
.sources a{word-break:break-word}
.box{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:16px;margin:22px 0}
.box h2{font:800 20px/1.3 Rubik;color:var(--navy);margin:0 0 8px}
.box pre{white-space:pre-wrap;background:#F4F3FB;border-radius:12px;padding:12px;font:15px/1.6 ui-monospace,monospace;direction:ltr;text-align:left}
nav.pager{display:flex;gap:10px;margin-top:28px}
nav.pager a{flex:1;text-align:center;background:var(--navy);color:#fff;text-decoration:none;border-radius:14px;padding:14px 10px;font-weight:700}
nav.pager a.ghost{background:transparent;color:var(--navy);border:1.5px solid var(--navy)}
.join{display:block;margin:30px 0 0;text-align:center;background:#25D366;color:#fff;font-weight:700;text-decoration:none;border-radius:14px;padding:14px}
footer{margin-top:24px;text-align:center;font-size:14px;color:var(--muted)}
.chip.aud{background:#FDECEE;color:var(--red)}
.archive a{display:block;padding:10px 0;border-bottom:1px solid var(--line);text-decoration:none}

/* ===== v2: mobile-first polish, motion, background ===== */
html{scroll-behavior:smooth}
body{padding-bottom:calc(84px + env(safe-area-inset-bottom));overflow-x:hidden;position:relative;min-height:100svh}
body::before,body::after{content:"";position:fixed;z-index:-1;border-radius:50%;filter:blur(60px);opacity:.55;pointer-events:none}
body::before{width:70vmax;height:70vmax;top:-30vmax;inset-inline-start:-25vmax;background:radial-gradient(circle,var(--lav),transparent 65%);animation:drift1 24s ease-in-out infinite alternate}
body::after{width:60vmax;height:60vmax;bottom:-28vmax;inset-inline-end:-22vmax;background:radial-gradient(circle,var(--pink),transparent 65%);animation:drift2 28s ease-in-out infinite alternate}
.bg-dots{position:fixed;inset:0;z-index:-1;pointer-events:none;background-image:radial-gradient(rgba(30,35,112,.07) 1px,transparent 1.2px);background-size:22px 22px;
-webkit-mask-image:linear-gradient(to bottom,#000,transparent 70%);mask-image:linear-gradient(to bottom,#000,transparent 70%)}
@keyframes drift1{to{transform:translate(12vmax,10vmax) scale(1.1)}}
@keyframes drift2{to{transform:translate(-10vmax,-12vmax) scale(1.08)}}
header.top{position:sticky;top:0;z-index:20;margin:0 -18px;padding:12px 18px;padding-top:calc(12px + env(safe-area-inset-top));
background:rgba(251,250,253,.72);-webkit-backdrop-filter:blur(14px) saturate(1.4);backdrop-filter:blur(14px) saturate(1.4);border-bottom:1px solid rgba(231,230,242,.7)}
.hero h1{font-size:clamp(26px,7.4vw,34px)}
video{aspect-ratio:9/16;width:auto;height:min(64svh,calc((100vw - 36px) * 16 / 9));max-width:100%;max-height:none;box-shadow:0 18px 40px -18px rgba(30,35,112,.45)}
.card a{min-height:88px;background:rgba(255,255,255,.86);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
transition:transform .25s cubic-bezier(.2,.8,.2,1),box-shadow .25s,border-color .25s;-webkit-tap-highlight-color:transparent}
.card a:hover{transform:translateY(-2px);box-shadow:0 12px 28px -14px rgba(30,35,112,.35);border-color:var(--lav)}
.card a:active{transform:scale(.98)}
.card a::after{content:"←";margin-inline-start:auto;color:var(--lav);font-weight:700;transition:transform .25s}
.card a:hover::after{transform:translateX(-4px);color:var(--red)}
.num,article .bignum{background-size:200% 200%;animation:shine 6s ease-in-out infinite}
@keyframes shine{0%,100%{background-position:0% 50%}50%{background-position:100% 50%}}
.reveal{opacity:0;transform:translateY(16px);transition:opacity .55s ease,transform .55s cubic-bezier(.2,.8,.2,1);transition-delay:calc(var(--i,0) * 55ms)}
.reveal.in{opacity:1;transform:none}
.backlink{display:inline-flex;align-items:center;gap:6px;margin:6px 0 4px;font-size:15px;font-weight:700;text-decoration:none;color:var(--navy);
background:rgba(255,255,255,.8);border:1px solid var(--line);border-radius:99px;padding:8px 14px}
article h3{display:flex;align-items:center;gap:8px}
article h3::before{content:"";width:6px;height:22px;border-radius:3px;background:linear-gradient(var(--navy),var(--red))}
article .sub{box-shadow:0 10px 24px -14px rgba(226,50,63,.7)}
.dock{position:fixed;inset-inline:0;bottom:0;z-index:30;padding:10px 12px calc(10px + env(safe-area-inset-bottom));
background:rgba(251,250,253,.82);-webkit-backdrop-filter:blur(16px) saturate(1.5);backdrop-filter:blur(16px) saturate(1.5);border-top:1px solid rgba(231,230,242,.9)}
.dock .in{max-width:680px;margin:0 auto;display:grid;grid-template-columns:1fr 1.25fr 1fr;gap:8px}
.dock a{display:flex;align-items:center;justify-content:center;gap:6px;min-height:50px;border-radius:14px;text-decoration:none;font-weight:700;font-size:15px}
.dock a.mid{background:var(--navy);color:#fff}
.dock a.side{background:#fff;color:var(--navy);border:1.5px solid var(--line)}
.dock a.off{visibility:hidden}
.prog{position:fixed;top:0;inset-inline:0;height:3px;z-index:40;background:linear-gradient(90deg,var(--red),var(--violet),var(--navy));transform-origin:right;transform:scaleX(0)}
.box{background:rgba(255,255,255,.88);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}
.box.prompt{border:1.5px solid var(--lav)}
.copy{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;min-height:50px;margin-top:10px;border:0;border-radius:14px;
background:linear-gradient(135deg,var(--navy),var(--violet));color:#fff;font:700 16px Rubik,Heebo,system-ui,sans-serif;cursor:pointer}
.copy.ok{background:#1F8A4C}
.box pre{max-height:260px;overflow:auto}
.join{box-shadow:0 12px 26px -14px rgba(37,211,102,.9)}
@view-transition{navigation:auto}
::view-transition-old(root){animation:vt-out .22s ease both}
::view-transition-new(root){animation:vt-in .32s cubic-bezier(.2,.8,.2,1) both}
@keyframes vt-out{to{opacity:0;transform:translateY(-8px)}}
@keyframes vt-in{from{opacity:0;transform:translateY(12px)}}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}.reveal{opacity:1;transform:none}html{scroll-behavior:auto}}