/* Novis free tools: shared page styles. Tokens copied from home-v2.html so the tools read as the same site.
   Layout: one reading column; the tool sits first and works in five seconds; explanation, mistakes and
   practice follow; the Novis call to action closes each page. */
@font-face{font-family:'Inter';font-weight:400;font-display:swap;src:url('/fonts/inter-400.woff2') format('woff2')}
@font-face{font-family:'Inter';font-weight:500;font-display:swap;src:url('/fonts/inter-500.woff2') format('woff2')}
@font-face{font-family:'Inter';font-weight:600;font-display:swap;src:url('/fonts/inter-600.woff2') format('woff2')}
@font-face{font-family:'Space Grotesk';font-weight:600;font-display:swap;src:url('/fonts/space-grotesk-600.woff2') format('woff2')}
@font-face{font-family:'Space Grotesk';font-weight:700;font-display:swap;src:url('/fonts/space-grotesk-700.woff2') format('woff2')}
:root{
  --bg:#0a0c10;--panel:#0f1218;--surface:#12151c;--s2:#141922;--s3:#1a212c;
  --ink:#eceef1;--muted:#aab0b8;--dim:#767c85;--line:rgba(255,255,255,.09);--line-2:rgba(255,255,255,.14);
  --accent:#2ED3C3;--accent-ink:#042b27;--bad:#E0607A;--warn:#E3A648;
  --display:'Space Grotesk',Inter,system-ui,sans-serif;--text:Inter,system-ui,-apple-system,'Segoe UI',sans-serif;
  color-scheme:dark;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:400 16px/1.6 var(--text)}
a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}
.wrap{max-width:860px;margin:0 auto;padding:0 20px}
header.site{position:sticky;top:0;z-index:5;background:rgba(10,12,16,.86);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;height:60px;gap:12px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);font:700 19px var(--display);letter-spacing:-.01em}
.brand img{width:26px;height:26px}
.nav{display:flex;align-items:center;gap:18px;font-size:14px}
.nav a.plain{color:var(--muted)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:10px;padding:10px 16px;font:600 15px var(--text);border:1px solid transparent;cursor:pointer;text-decoration:none!important}
.btn.primary{background:var(--accent);color:var(--accent-ink)}
.btn.ghost{border-color:var(--line-2);color:var(--ink);background:transparent}
.crumbs{font-size:13px;color:var(--dim);margin:28px 0 10px}.crumbs a{color:var(--muted)}
h1{font:700 clamp(30px,5vw,44px)/1.08 var(--display);letter-spacing:-.025em;margin:0 0 12px;text-wrap:balance}
h2{font:700 26px/1.2 var(--display);letter-spacing:-.02em;margin:48px 0 12px;text-wrap:balance}
h3{font:600 18px/1.3 var(--display);margin:24px 0 8px}
.lede{color:var(--muted);font-size:18px;max-width:62ch;margin:0 0 24px}
p,li{max-width:68ch}
.tool{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:22px}
.tabs{display:flex;flex-wrap:wrap;gap:6px;margin:0 0 18px}
.tab{background:transparent;border:1px solid var(--line-2);color:var(--muted);border-radius:999px;padding:7px 14px;font:500 14px var(--text);cursor:pointer}
.tab[aria-selected="true"]{background:var(--s3);color:var(--ink);border-color:var(--accent)}
.fields{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:14px}
.field label{display:block;font-size:13px;color:var(--muted);margin:0 0 6px}
.field input,.field select{width:100%;background:var(--surface);border:1px solid var(--line-2);border-radius:10px;color:var(--ink);font:500 16px var(--text);padding:11px 12px}
.field input:focus,.field select:focus,.tab:focus-visible,.btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.hint{font-size:13px;color:var(--dim);margin-top:6px}
.result{margin-top:20px;border-top:1px solid var(--line);padding-top:18px}
.answer{display:flex;align-items:baseline;flex-wrap:wrap;gap:10px}
.answer .k{font-size:14px;color:var(--muted)}
.answer .v{font:700 40px/1 var(--display);letter-spacing:-.02em;color:var(--accent);font-variant-numeric:tabular-nums}
.err{color:var(--bad);font-weight:500}
ol.steps{counter-reset:s;list-style:none;padding:0;margin:16px 0 0}
ol.steps li{counter-increment:s;position:relative;padding:10px 0 10px 40px;border-top:1px solid var(--line);max-width:none}
ol.steps li::before{content:counter(s);position:absolute;left:0;top:10px;width:26px;height:26px;border-radius:50%;background:var(--s3);color:var(--muted);font:600 13px/26px var(--text);text-align:center}
ol.steps .say{color:var(--muted);font-size:14px}
ol.steps .show{font:600 16px var(--text);font-variant-numeric:tabular-nums}
ol.steps .how{font-size:14px;color:var(--dim)}
.notes{margin:14px 0 0;padding:12px 14px;border-radius:10px;background:var(--s2);border:1px solid var(--line);font-size:14px;color:var(--muted)}
.notes p{margin:4px 0}
.formula{font:600 18px var(--text);background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:12px 16px;display:inline-block;font-variant-numeric:tabular-nums}
.mistake{border-left:3px solid var(--warn);padding:2px 0 2px 14px;margin:14px 0}
.mistake b{display:block;font-family:var(--display)}
details.practice{border:1px solid var(--line);border-radius:12px;padding:14px 16px;margin:10px 0;background:var(--panel)}
details.practice summary{cursor:pointer;font-weight:500;list-style:none}
details.practice summary::-webkit-details-marker{display:none}
details.practice summary::before{content:'+';display:inline-block;width:18px;color:var(--accent);font-weight:700}
details.practice[open] summary::before{content:'-'}
details.practice .ans{margin-top:10px;color:var(--muted)}
.cta{margin:56px 0 0;padding:26px;border-radius:16px;background:linear-gradient(180deg,var(--s2),var(--panel));border:1px solid var(--line-2)}
.cta h2{margin-top:0}
.cta .row{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.related{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px;margin-top:12px}
.related a{display:block;border:1px solid var(--line);border-radius:12px;padding:14px;color:var(--ink);background:var(--panel)}
.related a span{display:block;color:var(--dim);font-size:13px;margin-top:4px}
.related a:hover{border-color:var(--accent);text-decoration:none}
footer.site{margin:64px 0 0;border-top:1px solid var(--line);padding:24px 0 40px;font-size:13px;color:var(--dim)}
footer.site .wrap{display:flex;flex-wrap:wrap;gap:16px;justify-content:space-between}
footer.site a{color:var(--muted)}
.chart{width:100%;max-width:100%;height:auto;margin-top:14px;background:var(--surface);border:1px solid var(--line);border-radius:12px}
table.pts{border-collapse:collapse;width:100%;margin-top:6px;font-variant-numeric:tabular-nums}
table.pts td{padding:4px 6px 4px 0}
table.pts th{padding:0 6px 2px 0;text-align:left;font:400 13px var(--text);color:var(--muted)}
table.pts input{width:100%;background:var(--surface);border:1px solid var(--line-2);border-radius:8px;color:var(--ink);font:500 15px var(--text);padding:8px 10px}
.practice-only{margin:0 0 18px;padding:12px 14px;border:1px solid var(--line-2);border-left:3px solid var(--warn);border-radius:10px;background:var(--s2);color:var(--ink);font-size:15px;max-width:none}
@media (max-width:560px){.nav a.plain{display:none}.tool{padding:16px}.answer .v{font-size:34px}h2{margin-top:40px}}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}