:root{--bg:#0e0f12;--bg2:#161820;--ink:#e9e8e3;--muted:#8a8a82;--line:rgba(255,255,255,.14);
--amber:#f5b041;--violet:#8b5cf6;--teal:#14b8a6;--blue:#2f80c8;--red:#e85d5d;--max:1080px}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.65 Georgia,"Liberation Serif",serif}
a{color:var(--amber);text-decoration:none}a:hover{text-decoration:underline}
img{max-width:100%;height:auto}
h1,h2,h3{font-weight:600;line-height:1.2;letter-spacing:.01em}
h1{font-size:clamp(2rem,5vw,3.4rem);margin:.2em 0}h2{font-size:1.7rem;margin:0 0 .6em}h3{font-size:1.15rem;margin:.2em 0}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
.muted{color:var(--muted)}.small{font-size:.85rem}
.top{position:sticky;top:0;z-index:20;background:rgba(14,15,18,.88);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;gap:18px;height:58px;font-family:Helvetica,Arial,sans-serif}
.brand{display:flex;align-items:center;gap:12px;color:var(--ink);font-weight:600;letter-spacing:.04em}
.nav{margin-left:auto;display:flex;gap:22px;font-size:.95rem}
.nav a{color:var(--muted)}.nav a:hover,.nav a[aria-current]{color:var(--ink);text-decoration:none}
.nav a[aria-current]{border-bottom:2px solid var(--amber)}
.burger{display:none;margin-left:auto;background:none;border:0;color:var(--ink);font-size:1.5rem;cursor:pointer}
.btn{display:inline-block;padding:.7em 1.4em;border-radius:6px;font:600 .95rem Helvetica,Arial,sans-serif;border:1px solid var(--amber);color:var(--amber)}
.btn:hover{text-decoration:none;background:rgba(245,176,65,.12)}
.btn.primary{background:var(--amber);color:#14110a}.btn.primary:hover{background:#ffc566}
.btn.ghost{border-color:var(--line);color:var(--ink)}
.btn.off{opacity:.45;pointer-events:none}
.cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:1.4em}
section{padding:64px 0}section+section{border-top:1px solid var(--line)}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{background:var(--bg2);border:1px solid var(--line);border-radius:10px;padding:22px}
.card p{margin:.4em 0 0;color:#c9c8c2;font-size:.95rem}
.tag{display:inline-block;font:600 .7rem Helvetica,Arial,sans-serif;letter-spacing:.12em;text-transform:uppercase;padding:.2em .7em;border-radius:99px;border:1px solid var(--line);color:var(--muted)}
.tag.soon{color:var(--amber);border-color:rgba(245,176,65,.5)}
/* hero */
.hero{position:relative;min-height:calc(100vh - 58px);display:flex;align-items:center;overflow:hidden;padding:0}
#hero-canvas{position:absolute;inset:0;width:100%;height:100%}
.hero-fallback{position:absolute;right:8%;top:50%;transform:translateY(-50%);width:min(34vw,380px);opacity:.9}
.hero.has-3d .hero-fallback{display:none}
.hero:after{content:"";position:absolute;inset:0;pointer-events:none;background:radial-gradient(ellipse at 70% 50%,transparent 30%,rgba(14,15,18,.65) 100%)}
.hero .wrap{position:relative;z-index:2;width:100%}
.hero-text{max-width:560px}
.eyebrow{font:600 .8rem Helvetica,Arial,sans-serif;letter-spacing:.3em;text-transform:uppercase;color:var(--amber)}
.lead{font-size:1.25rem;color:#d7d6d0}
.book-row{display:flex;gap:36px;align-items:center}.book-row img{width:200px;border-radius:4px;box-shadow:0 14px 40px rgba(0,0,0,.6)}
.page main{padding:56px 0 40px}.page main .wrap{max-width:780px}
.prose p,.prose li{color:#d7d6d0}
.list{display:grid;gap:14px;padding:0;list-style:none}
.donate{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
form.sub{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}
form.sub input{flex:1;min-width:220px;padding:.7em 1em;border-radius:6px;border:1px solid var(--line);background:var(--bg);color:var(--ink);font:inherit}
.foot{border-top:1px solid var(--line);padding:36px 0;font-family:Helvetica,Arial,sans-serif;font-size:.9rem}
.foot-cols{display:grid;grid-template-columns:2fr 1fr 1fr;gap:24px;margin-bottom:18px}
@media(max-width:760px){
 body{font-size:16px}.grid3,.donate{grid-template-columns:1fr}.foot-cols{grid-template-columns:1fr}
 .burger{display:block}.nav{display:none;position:absolute;top:58px;left:0;right:0;flex-direction:column;gap:0;background:var(--bg);border-bottom:1px solid var(--line)}
 .nav a{padding:14px 20px;border-top:1px solid var(--line)}.menu-open .nav{display:flex}
 .book-row{flex-direction:column;align-items:flex-start}.hero-fallback{opacity:.25;right:-10%;width:70vw}
 section{padding:44px 0}.hero{align-items:flex-start;padding-top:44px}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
.nav a.lang{border:1px solid var(--line);border-radius:4px;padding:0 .5em;font-size:.8rem;line-height:1.7;color:var(--ink)}
.nav a.lang:hover{border-color:var(--amber);color:var(--amber)}
@media(max-width:760px){.nav a.lang{border:0;border-top:1px solid var(--line);border-radius:0;padding:14px 20px;font-size:inherit;line-height:inherit}}
/* hero: фігуру можна крутити мишкою */
.hero .wrap{pointer-events:none}.hero-text{pointer-events:auto}
.hero:after{z-index:1}
/* таблиця нуклідів */
.iso-wrap{max-width:1180px;padding-top:40px;padding-bottom:40px;font-family:"IBM Plex Mono","Courier New",monospace}
body.page main .wrap.iso-wrap{max-width:1180px}
.iso-head{text-align:center;margin-bottom:1.6rem}.iso-head h1{background:linear-gradient(135deg,#60a5fa,#a78bfa 50%,#f472b6);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;font-family:inherit}
.iso-stats{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap;margin-bottom:1.4rem}
.iso-stat{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);border-radius:8px;padding:.6rem 1.2rem;text-align:center}
.iso-stat .v{font-size:1.5rem;font-weight:700}.iso-stat .l{font-size:.65rem;color:#64748b;letter-spacing:.08em;text-transform:uppercase}
.iso-filters{display:flex;flex-direction:column;gap:.6rem;margin-bottom:1.2rem;background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.07);border-radius:10px;padding:.9rem 1.2rem}
.iso-filters .lbl{font-size:.7rem;color:#64748b;letter-spacing:.1em}.iso-filters .lbl2{font-size:.7rem;color:#94a3b8;align-self:center}
.iso-filters .grp{display:flex;gap:.3rem;flex-wrap:wrap}.iso-filters .sort{margin-left:auto}
.iso-filters button{padding:.2rem .55rem;border-radius:5px;border:0;background:rgba(255,255,255,.06);color:#94a3b8;cursor:pointer;font:inherit;font-size:.72rem}
.iso-filters button.on{background:#3b82f6;color:#fff}.iso-filters .sort button.on{background:#7c3aed}
.iso-table-wrap{overflow-x:auto;border-radius:12px;border:1px solid rgba(255,255,255,.07)}
.iso-table{width:100%;border-collapse:collapse;font-size:.8rem}
.iso-table th{padding:.7rem .8rem;text-align:left;color:#64748b;font-weight:600;font-size:.65rem;letter-spacing:.08em;white-space:nowrap;background:rgba(255,255,255,.05);border-bottom:1px solid rgba(255,255,255,.1)}
.iso-table td{padding:.6rem .8rem;border-bottom:1px solid rgba(255,255,255,.04);color:#cbd5e1}
.iso-table tbody tr:nth-child(even){background:rgba(255,255,255,.015)}.iso-table tbody tr:hover{background:rgba(255,255,255,.06)}
.iso-table .sym{font-weight:800;font-size:1rem}.iso-table .c{text-align:center}.iso-table .r{text-align:right}.iso-table .nw{white-space:nowrap}.iso-table .dim{color:#475569}
.pill-a{background:rgba(96,165,250,.15);color:#60a5fa;border-radius:4px;padding:.1rem .4rem;font-weight:700}
.pill{border:1px solid;border-radius:4px;padding:.1rem .5rem;font-weight:700;font-size:.75rem}
.iso-empty{text-align:center;padding:3rem;color:#475569}
.iso-legend{margin-top:1.2rem;display:flex;gap:1.6rem;flex-wrap:wrap;background:rgba(255,255,255,.02);border:1px solid rgba(255,255,255,.06);border-radius:8px;padding:1rem 1.4rem;font-size:.72rem}
.iso-legend .lg-h{font-size:.65rem;color:#64748b;letter-spacing:.1em}.iso-src{text-align:center;margin-top:1rem}

.iso-filters .row{display:flex;gap:.4rem;flex-wrap:wrap;align-items:center}
.iso-filters select{background:rgba(255,255,255,.06);color:#e2e8f0;border:1px solid rgba(255,255,255,.12);border-radius:5px;padding:.2rem .4rem;font:inherit;font-size:.75rem}
.iso-filters button.tog{background:rgba(255,255,255,.06);color:#475569}
.iso-table tr.res{opacity:.78;background:rgba(167,139,250,.05)}.iso-table td.dim{color:#64748b}.iso-table .sm{font-size:.7rem}
.iso-table tr.has-im{cursor:pointer}.iso-table .tri{margin-left:.35rem;font-size:.6rem;color:#fbbf24;vertical-align:middle}
.iso-table tr.open{background:rgba(251,191,36,.08)!important}
.iso-table tr.im-row td{padding:0;border-bottom:1px solid rgba(251,191,36,.3)}
.im-box{background:rgba(251,191,36,.06);border-left:3px solid #fbbf24;padding:.7rem 1.2rem .8rem 1.4rem}
.im-h{font-size:.62rem;color:#fbbf24;letter-spacing:.2em;margin-bottom:.5rem;text-transform:uppercase}
.im-list{display:flex;gap:1rem;flex-wrap:wrap}
.im{background:rgba(251,191,36,.08);border:1px solid rgba(251,191,36,.25);border-radius:8px;padding:.5rem .9rem;min-width:200px}
.im-t{font-weight:800;font-size:.95rem;color:#fbbf24;margin-bottom:.3rem}
.im-g{display:grid;grid-template-columns:auto 1fr;gap:.1rem .6rem;font-size:.7rem}.im-g span:nth-child(odd){color:#64748b}
.im-n{font-size:.65rem;color:#64748b;margin-top:.35rem;font-style:italic}
/* щоденник */
.entry-li .meta,.entry .meta{font:600 .72rem Helvetica,Arial,sans-serif;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-bottom:.3em}
.entry-li h3{margin:.1em 0}.entry-li h3 a{color:var(--ink)}.entry-li h3 a:hover{color:var(--amber);text-decoration:none}
.badge{padding:.1em .6em;border-radius:99px;border:1px solid var(--line);font-size:.68rem}.badge.public{color:#22c55e;border-color:#22c55e55}.badge.members{color:var(--amber);border-color:rgba(245,176,65,.5)}
.entry h1{margin-top:.2em}.entry p,.entry li{color:#d7d6d0}
.btn.off{opacity:.45;pointer-events:none}
/* форми: honeypot, статус, зворотний зв'язок */
.hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}
.form-msg{margin:.6em 0 0;font-size:.95em}.form-msg.ok{color:var(--teal)}.form-msg.err{color:var(--red)}
form.contact{display:grid;gap:12px;max-width:560px;margin-top:1em}
form.contact input,form.contact select,form.contact textarea{padding:.7em 1em;border-radius:6px;border:1px solid var(--line);background:var(--bg);color:var(--ink);font:inherit}
form.contact textarea{min-height:160px;resize:vertical}
form.contact button{justify-self:start}
/* About: фон — туманність Оріона (Hubble), портрет вирізаний з фото */
.orion-bg{position:fixed;inset:0;z-index:-1;pointer-events:none;background:linear-gradient(90deg,rgba(8,9,12,.93) 0%,rgba(8,9,12,.8) 38%,rgba(8,9,12,.3) 62%,rgba(8,9,12,.05) 100%),url(orion.webp) 65% 35%/cover no-repeat}
.author-hero{position:relative;min-height:0;margin-bottom:0}
.author-hero .author-photo{position:absolute;right:-70px;top:-40px;height:720px;width:auto;z-index:0;pointer-events:none}
.author-hero .txt,.author-hero ~ *{position:relative;z-index:1;text-shadow:0 1px 10px rgba(0,0,0,.9)}
@media(min-width:701px){.orion-bg ~ .wrap.prose{max-width:var(--max)}.author-hero .txt,.author-hero ~ *{max-width:52%}}
@media(max-width:700px){.orion-bg{background:linear-gradient(180deg,rgba(8,9,12,.15) 0%,rgba(8,9,12,.55) 45%,rgba(8,9,12,.88) 70%),url(orion.webp) 60% 30%/cover no-repeat}.author-hero .author-photo{position:relative;right:auto;top:auto;display:block;width:100%;height:auto;margin:-10px 0 0}.author-hero .txt{margin-top:-150px}}
/* сторінка «Інструменти»: картки з превʼю */
.tool-grid{list-style:none;padding:0;margin:1.5em 0 0;display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.tool-card{display:flex;flex-direction:column;background:var(--bg2);border:1px solid var(--line);border-radius:12px;overflow:hidden;color:inherit;text-decoration:none;transition:border-color .2s,transform .2s}
a.tool-card:hover{border-color:rgba(245,176,65,.55);transform:translateY(-3px);text-decoration:none}
.tool-card img{display:block;width:100%;aspect-ratio:16/10;object-fit:cover;background:#0a0b0e}
.tool-body{padding:16px 20px 20px;display:flex;flex-direction:column;gap:.35em;flex:1}
.tool-body h3{margin:.1em 0 0;font-size:1.15rem;color:var(--ink)}
.tool-body p{margin:0;color:#c9c8c2;font-size:.95rem}
.tool-body .go{margin-top:auto;padding-top:.6em;color:var(--amber);font-weight:600;font-size:.95rem}
.tool-card.soon{border-style:dashed;justify-content:center;min-height:200px;text-align:center}
.tool-card.soon .tool-body{align-items:center;justify-content:center}
@media(max-width:700px){.tool-grid{grid-template-columns:1fr}}