/* Codex Research — journal, articles and tools. Light surfaces, lime accents. */
.cxb{--ink:#0F1115;--ink2:#3A4048;--mut:#6B7280;--line:#E6E8EB;--soft:#F4F5F2;--g:#3EE53A;--gd:#1A8F17;--gt:#EAF8F0;background:var(--soft);padding:clamp(36px,4.5vw,72px) 0 clamp(60px,6vw,100px);color:var(--ink)}
.cxb *{box-sizing:border-box}
.cxb-wrap{max-width:1500px;margin:0 auto;padding:0 clamp(28px,4.4vw,80px)}
.cxb-k{display:inline-flex;align-items:center;gap:8px;margin:0;font:600 11px/1 "IBM Plex Mono",ui-monospace,monospace;letter-spacing:.16em;text-transform:uppercase;color:var(--gd)}
.cxb-k:before{content:"";width:6px;height:6px;border-radius:50%;background:var(--g)}

/* hero meta (inside the dark header card) */
.cxb-hero{padding:clamp(34px,4vw,64px) clamp(28px,4.4vw,80px) clamp(40px,4.4vw,72px);max-width:1500px;width:100%;align-self:center}
.cxb-hero .ch2-h{margin:16px 0 0;max-width:22ch}
.cxb-hero .ch2-h.sm{font-size:clamp(30px,3.6vw,54px);line-height:1.04;max-width:26ch}
.cxb-meta{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0 0}
.cxb-meta span{display:inline-flex;align-items:center;gap:8px;padding:8px 13px;border-radius:999px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);color:rgba(255,255,255,.86);font:500 13px/1 var(--f-body,inherit)}
.cxb-meta b{color:#fff;font-weight:700}
.cxb-meta i{width:7px;height:7px;border-radius:50%;background:var(--g);box-shadow:0 0 12px rgba(62,229,58,.8)}
.cxb-crumb{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 4px;font:600 11px/1 "IBM Plex Mono",ui-monospace,monospace;letter-spacing:.12em;text-transform:uppercase}
.cxb-crumb a{color:rgba(255,255,255,.62);text-decoration:none}.cxb-crumb a:hover{color:var(--g)}
.cxb-crumb span{color:rgba(255,255,255,.35)}

/* category pills */
.cxb-cats{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 28px}
.cxb-cats a{padding:10px 16px;border-radius:999px;background:#fff;border:1px solid var(--line);color:var(--ink2);text-decoration:none;font:700 13px/1 var(--f-display,inherit);transition:border-color .2s,background .2s,transform .2s}
.cxb-cats a:hover{border-color:var(--gd);transform:translateY(-1px)}
.cxb-cats a.on{background:var(--gt);border-color:var(--g);color:var(--gd);box-shadow:0 10px 24px -18px rgba(26,143,23,.7)}

/* cards */
.cxb-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(16px,1.8vw,26px)}
.cxb-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:26px;overflow:hidden;text-decoration:none;color:var(--ink);box-shadow:0 30px 60px -50px rgba(0,0,0,.4);transition:transform .25s,box-shadow .25s,border-color .25s}
.cxb-card:hover{transform:translateY(-4px);border-color:#CFEFD1;box-shadow:0 34px 60px -40px rgba(26,143,23,.45)}
.cxb-im{position:relative;aspect-ratio:16/10;background:radial-gradient(120% 90% at 70% 10%,#E4F9E4 0,#F4F7F2 55%,#EEF1EC 100%);display:flex;align-items:flex-end;justify-content:center;gap:4px;overflow:hidden}
.cxb-im img{height:88%;width:auto;object-fit:contain;filter:drop-shadow(0 18px 18px rgba(0,0,0,.18));transition:transform .4s}
.cxb-im img+img{height:76%;margin-left:-14%}
.cxb-im img.cover{width:100%;height:100%;object-fit:cover;filter:none}
.cxb-card:hover .cxb-im img{transform:translateY(-4px) scale(1.02)}
.cxb-tag{position:absolute;top:14px;left:14px;padding:7px 11px;border-radius:999px;background:rgba(255,255,255,.92);border:1px solid var(--line);font:600 10.5px/1 "IBM Plex Mono",ui-monospace,monospace;letter-spacing:.12em;text-transform:uppercase;color:var(--gd)}
.cxb-cb{display:flex;flex-direction:column;gap:10px;padding:20px 22px 22px;flex:1}
.cxb-cb h3{margin:0;font:800 clamp(18px,1.4vw,21px)/1.22 var(--f-display,inherit);letter-spacing:-.01em}
.cxb-cb p{margin:0;color:var(--ink2);font:400 15px/1.55 var(--f-body,inherit)}
.cxb-cm{margin-top:auto;padding-top:8px;display:flex;align-items:center;justify-content:space-between;color:var(--mut);font:500 12.5px/1 var(--f-body,inherit)}
.cxb-cm em{font-style:normal;color:var(--gd);font-weight:700}
.cxb-feat{grid-column:1/-1;display:grid;grid-template-columns:1.15fr 1fr}
.cxb-feat .cxb-im{aspect-ratio:auto;min-height:360px}
.cxb-feat .cxb-im img{height:78%}
.cxb-feat .cxb-im img+img{height:66%}
.cxb-feat .cxb-cb{padding:clamp(24px,3vw,44px);justify-content:center}
.cxb-feat h3{font-size:clamp(24px,2.4vw,36px);line-height:1.08}
.cxb-feat p{font-size:16.5px}
.cxb-pg{display:flex;justify-content:center;gap:8px;margin-top:36px}
.cxb-pg a,.cxb-pg span{min-width:44px;padding:12px 16px;border-radius:999px;background:#fff;border:1px solid var(--line);text-align:center;color:var(--ink);text-decoration:none;font:700 13px/1 var(--f-display,inherit)}
.cxb-pg span{background:var(--gt);border-color:var(--g);color:var(--gd)}
.cxb-empty{background:#fff;border:1px dashed #CFD5D2;border-radius:26px;padding:60px 24px;text-align:center;color:var(--mut)}

/* article */
.cxb-art{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:clamp(24px,3.4vw,56px);align-items:start}
.cxb-doc{background:#fff;border:1px solid var(--line);border-radius:28px;box-shadow:0 30px 60px -44px rgba(0,0,0,.35);padding:clamp(26px,3.6vw,60px)}
.cxb-by{display:flex;flex-wrap:wrap;gap:14px;align-items:center;padding-bottom:22px;margin-bottom:8px;border-bottom:1px solid #EEF0F2}
.cxb-av{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;background:var(--gt);box-shadow:inset 0 0 0 1px #BFEBC1;color:var(--gd);font:800 15px/1 var(--f-display,inherit)}
.cxb-by div{display:flex;flex-direction:column;gap:4px;font:500 13px/1.3 var(--f-body,inherit);color:var(--mut)}
.cxb-by b{color:var(--ink);font-weight:700}
.cxb-by .rv{margin-left:auto;padding:8px 12px;border-radius:12px;background:var(--gt);color:var(--gd);font:600 12px/1.3 var(--f-body,inherit)}
.cxb-rt{font:400 17.5px/1.78 var(--f-body,inherit);color:#22272E}
.cxb-rt>*:first-child{margin-top:18px}
.cxb-rt h2{margin:48px 0 14px;font:900 clamp(24px,2.3vw,32px)/1.12 var(--f-display,inherit);letter-spacing:-.02em;color:var(--ink);scroll-margin-top:110px}
.cxb-rt h3{margin:32px 0 10px;font:800 20px/1.25 var(--f-display,inherit);color:var(--ink);scroll-margin-top:110px}
.cxb-rt p{margin:0 0 18px}
.cxb-rt a{color:var(--gd);font-weight:600;text-decoration:underline;text-decoration-color:rgba(26,143,23,.35);text-underline-offset:3px}
.cxb-rt a:hover{text-decoration-color:var(--gd)}
.cxb-rt ul,.cxb-rt ol{margin:0 0 20px;padding-left:22px}
.cxb-rt li{margin:6px 0}
.cxb-rt li::marker{color:var(--gd);font-weight:700}
.cxb-rt strong{color:var(--ink)}
.cxb-rt blockquote{margin:26px 0;padding:18px 22px;border-radius:18px;background:var(--gt);border:1px solid #CDEFD0;color:#1D3B1F}
.cxb-rt blockquote p:last-child{margin:0}
.cxb-rt code{font:500 .88em "IBM Plex Mono",ui-monospace,monospace;background:var(--soft);padding:2px 6px;border-radius:6px}
.cxb-rt hr{border:0;border-top:1px solid #EEF0F2;margin:36px 0}
.cxb-rt img{max-width:100%;border-radius:18px}
.cxb-tw{overflow-x:auto;margin:24px 0;border:1px solid var(--line);border-radius:18px}
.cxb-rt table{width:100%;border-collapse:collapse;font-size:15px;line-height:1.45}
.cxb-rt th{text-align:left;background:var(--soft);font:700 11px/1.2 "IBM Plex Mono",ui-monospace,monospace;letter-spacing:.1em;text-transform:uppercase;color:var(--mut);padding:13px 16px}
.cxb-rt td{padding:13px 16px;border-top:1px solid #EEF0F2;vertical-align:top}
.cxb-rt td:first-child{font-weight:700;color:var(--ink)}

.cxb-faq{margin-top:46px}
.cxb-faq h2{margin:0 0 16px;font:900 clamp(24px,2.3vw,32px)/1.1 var(--f-display,inherit);letter-spacing:-.02em}
.cxb-faq details{border:1px solid var(--line);border-radius:18px;background:#fff;margin:0 0 10px;transition:border-color .2s,box-shadow .2s}
.cxb-faq details[open]{border-color:#BFEBC1;box-shadow:0 18px 36px -30px rgba(26,143,23,.6)}
.cxb-faq summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;gap:16px;align-items:center;padding:18px 20px;font:700 16.5px/1.35 var(--f-display,inherit)}
.cxb-faq summary::-webkit-details-marker{display:none}
.cxb-faq summary:after{content:"+";flex:none;width:30px;height:30px;border-radius:50%;display:grid;place-items:center;background:var(--gt);color:var(--gd);font:700 18px/1 var(--f-display,inherit);transition:transform .25s}
.cxb-faq details[open] summary:after{transform:rotate(45deg)}
.cxb-faq details>div{padding:0 20px 18px;color:var(--ink2);font:400 16px/1.65 var(--f-body,inherit)}
.cxb-dis{margin-top:36px;padding:18px 20px;border-radius:18px;background:var(--soft);border:1px solid var(--line);color:var(--mut);font:500 13.5px/1.55 var(--f-body,inherit)}
.cxb-dis b{color:var(--ink)}

.cxb-side{position:sticky;top:100px;display:flex;flex-direction:column;gap:16px}
.cxb-box{background:#fff;border:1px solid var(--line);border-radius:22px;padding:18px}
.cxb-box h4{margin:0 0 12px;font:600 11px/1 "IBM Plex Mono",ui-monospace,monospace;letter-spacing:.16em;text-transform:uppercase;color:var(--mut)}
.cxb-toc{display:flex;flex-direction:column;gap:2px;max-height:46vh;overflow:auto}
.cxb-toc a{display:block;padding:9px 12px;border-radius:12px;color:var(--ink2);text-decoration:none;font:600 14px/1.3 var(--f-display,inherit);border-left:2px solid transparent}
.cxb-toc a:hover{background:var(--soft)}
.cxb-toc a.on{background:var(--gt);color:var(--gd);border-left-color:var(--g)}
.cxb-pr{display:flex;align-items:center;gap:12px;padding:10px;border-radius:16px;text-decoration:none;color:var(--ink);transition:background .2s}
.cxb-pr:hover{background:var(--soft)}
.cxb-pr img{width:52px;height:64px;object-fit:contain;flex:none;filter:drop-shadow(0 8px 8px rgba(0,0,0,.15))}
.cxb-pr b{display:block;font:800 15px/1.2 var(--f-display,inherit)}
.cxb-pr small{display:block;margin-top:4px;color:var(--mut);font:500 12.5px/1.2 var(--f-body,inherit)}
.cxb-pr em{margin-left:auto;font-style:normal;font:800 14px/1 var(--f-display,inherit);color:var(--gd)}
.cxb-cta{display:flex;align-items:center;justify-content:center;gap:8px;margin-top:10px;padding:13px 16px;border-radius:999px;background:var(--g);color:#06260A;text-decoration:none;font:800 12.5px/1 var(--f-display,inherit);letter-spacing:.08em;text-transform:uppercase;box-shadow:0 14px 30px -16px rgba(62,229,58,.9);transition:transform .2s}
.cxb-cta:hover{transform:translateY(-2px)}
.cxb-note{font:500 13px/1.5 var(--f-body,inherit);color:var(--mut)}
.cxb-note b{color:var(--ink)}
.cxb-rel{margin-top:clamp(40px,4vw,64px)}
.cxb-rel>h2{margin:0 0 20px;font:900 clamp(24px,2.3vw,32px)/1.1 var(--f-display,inherit);letter-spacing:-.02em}

/* tool (calculator) */
.cxb-tool{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(18px,2.4vw,32px);align-items:start}
.cxb-fl{display:flex;flex-direction:column;gap:8px;margin-bottom:18px}
.cxb-fl label{font:600 11px/1 "IBM Plex Mono",ui-monospace,monospace;letter-spacing:.14em;text-transform:uppercase;color:var(--mut)}
.cxb-chips{display:flex;flex-wrap:wrap;gap:8px}
.cxb-chips button{padding:11px 16px;border-radius:999px;border:1px solid var(--line);background:#fff;color:var(--ink2);font:700 14px/1 var(--f-display,inherit);cursor:pointer;transition:all .2s}
.cxb-chips button:hover{border-color:var(--gd)}
.cxb-chips button.on{background:var(--gt);border-color:var(--g);color:var(--gd)}
.cxb-in{display:flex;align-items:center;border:1px solid var(--line);border-radius:14px;background:#fff;overflow:hidden}
.cxb-in input,.cxb-in select{flex:1;border:0;outline:0;padding:14px 16px;font:700 17px/1 var(--f-display,inherit);color:var(--ink);background:transparent;min-width:0}
.cxb-in span{padding:0 16px;color:var(--mut);font:600 13px/1 "IBM Plex Mono",ui-monospace,monospace}
.cxb-in:focus-within{border-color:var(--g);box-shadow:0 0 0 4px rgba(62,229,58,.18)}
.cxb-out{background:linear-gradient(160deg,#F0FBF0,#FFFFFF 60%);border:1px solid #CDEFD0;border-radius:28px;padding:clamp(22px,3vw,40px);box-shadow:0 30px 60px -44px rgba(26,143,23,.5)}
.cxb-big{display:flex;align-items:baseline;gap:10px;margin:10px 0 4px}
.cxb-big b{font:900 clamp(56px,6vw,88px)/.9 var(--f-display,inherit);letter-spacing:-.04em;color:var(--ink)}
.cxb-big span{font:700 18px/1 var(--f-display,inherit);color:var(--gd)}
.cxb-syr{margin:22px 0 8px;position:relative;height:74px}
.cxb-syr svg{width:100%;height:100%;overflow:visible}
.cxb-kv{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:16px}
.cxb-kv div{background:#fff;border:1px solid var(--line);border-radius:16px;padding:14px}
.cxb-kv small{display:block;font:600 10px/1 "IBM Plex Mono",ui-monospace,monospace;letter-spacing:.14em;text-transform:uppercase;color:var(--mut)}
.cxb-kv b{display:block;margin-top:8px;font:800 20px/1 var(--f-display,inherit)}
.cxb-warn{margin-top:14px;padding:12px 14px;border-radius:14px;background:#FFF7E6;border:1px solid #F5DDA5;color:#7A5300;font:600 13px/1.45 var(--f-body,inherit);display:none}
.cxb-warn.on{display:block}

@media(max-width:1100px){.cxb-grid{grid-template-columns:1fr 1fr}.cxb-art{grid-template-columns:1fr}.cxb-side{position:static}}
@media(max-width:760px){.cxb-grid{grid-template-columns:1fr}.cxb-feat{grid-template-columns:1fr}.cxb-feat .cxb-im{min-height:220px}.cxb-tool{grid-template-columns:1fr}.cxb-by .rv{margin-left:0}.cxb-rt{font-size:16.5px}}