/* peptulator.com design system, 2026-09 redesign.
   One typeface (IBM Plex Sans, self-hosted), one accent, hairline borders, light first.
   Tokens only change in dark mode. No frameworks, no dependencies. */

@font-face{font-family:"Plex";font-style:normal;font-weight:400;font-display:swap;src:url(/assets/fonts/IBMPlexSans-Regular-Latin1.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Plex";font-style:normal;font-weight:500;font-display:swap;src:url(/assets/fonts/IBMPlexSans-Medium-Latin1.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Plex";font-style:normal;font-weight:600;font-display:swap;src:url(/assets/fonts/IBMPlexSans-SemiBold-Latin1.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}

:root{
  --bg:#F6F7F8; --surface:#FFFFFF; --surface-2:#EEF1F3;
  --line:#E6E9EC; --line-2:#D9DEE3;
  --ink:#0F1720; --ink-2:#5B6470; --ink-3:#6B7480;
  --accent:#0E6B66; --accent-hover:#0B5A56; --accent-tint:#E8F2F1; --accent-ink:#FFFFFF; --accent-line:#B9D8D5;
  --ok:#1A7F5A; --ok-tint:#E9F5EF;
  --warn:#A15C00; --warn-tint:#FBF1E3;
  --err:#B42318; --err-tint:#FCEBE9;
  --r-sm:6px; --r:8px; --r-lg:12px; --r-xl:16px;
  --shadow-float:0 1px 2px rgba(15,23,32,.04),0 8px 24px rgba(15,23,32,.08);
  --tap:44px; --wrap:1040px; --prose:700px;
  --ease:cubic-bezier(.23,1,.32,1);
  color-scheme:light;
}
@media (prefers-color-scheme:dark){
  :root{
    --bg:#111417; --surface:#191D21; --surface-2:#22272C;
    --line:#262B31; --line-2:#343A41;
    --ink:#E8EAED; --ink-2:#A8B0B8; --ink-3:#8A929B;
    --accent:#4CC2BC; --accent-hover:#6BD0CB; --accent-tint:#173432; --accent-ink:#111417; --accent-line:#2A5A57;
    --ok:#3DDC97; --ok-tint:#14302A;
    --warn:#FBBF24; --warn-tint:#33270E;
    --err:#F87171; --err-tint:#3A1A18;
    --shadow-float:0 1px 2px rgba(0,0,0,.4),0 12px 32px rgba(0,0,0,.5);
    color-scheme:dark;
  }
}

/* ---------- base */
*{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);overflow-x:hidden;
  font:400 16px/1.6 "Plex",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;
  font-feature-settings:"kern" 1,"liga" 1;
}
.num,td.num,th.num,.mini button,table{font-variant-numeric:tabular-nums}
.big,.fig dd,input,.stick b{font-variant-numeric:tabular-nums slashed-zero}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
a{color:var(--accent);text-decoration-thickness:1px;text-underline-offset:2px}
a:hover{text-decoration-thickness:2px}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
::selection{background:var(--accent-tint);color:var(--ink)}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation-duration:.01ms!important;transition-duration:.01ms!important}}
@media (hover:hover) and (pointer:fine){a,button,.chip,.mini button,.cards a,.next a{transition:color .12s ease,background-color .12s ease,border-color .12s ease,box-shadow .12s ease}}

/* ---------- type */
h1{font-size:clamp(26px,4.2vw,34px);line-height:1.15;letter-spacing:-.02em;font-weight:600;margin:40px 0 8px;text-wrap:balance}
h2{font-size:22px;line-height:1.25;letter-spacing:-.012em;font-weight:600;margin:56px 0 12px}
h3{font-size:17px;line-height:1.3;font-weight:600;margin:28px 0 8px}
h2+h3{margin-top:12px}
p{margin:0 0 14px;max-width:var(--prose)}
.sub{color:var(--ink-2);font-size:17px;line-height:1.55;margin:0 0 20px;max-width:62ch}
.hint,p.hint{font-size:13px;line-height:1.5;color:var(--ink-3);margin:0 0 16px;max-width:var(--prose)}
b,strong{font-weight:600}
code{font:500 13px/1.5 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;background:var(--surface-2);border-radius:4px;padding:2px 6px;color:var(--ink)}
ul,ol{max-width:var(--prose);padding-left:22px;margin:0 0 16px}
li{margin:0 0 6px}
ul.tight{padding-left:20px}
ul.tight li{margin:0 0 4px}
.sr{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.skip{position:absolute;left:-9999px;top:8px;z-index:100;background:var(--surface);color:var(--ink);padding:10px 14px;border-radius:var(--r);border:1px solid var(--line-2);font-weight:500;text-decoration:none}
.skip:focus{left:16px}
h2,h3,#all{scroll-margin-top:80px}

/* ---------- header */
.top{background:var(--surface);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:30}
.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;height:60px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font-weight:600;font-size:16px;letter-spacing:-.01em;white-space:nowrap;flex:0 0 auto}
.brand svg{width:22px;height:22px;display:block;color:var(--accent)}
.brand small{display:none;font-weight:400;color:var(--ink-3);font-size:13px;margin-left:4px}
@media (min-width:900px){.brand small{display:inline}}
.top nav{display:flex;gap:2px;font-size:14px;white-space:nowrap;min-width:0}
.top nav a{color:var(--ink-2);text-decoration:none;padding:8px 10px;border-radius:var(--r-sm);font-weight:500}
.top nav a:hover{color:var(--ink);background:var(--surface-2)}
.top nav a[aria-current]{color:var(--ink);background:var(--surface-2)}
.menu{display:none;align-items:center;justify-content:center;width:40px;height:40px;border:1px solid var(--line-2);border-radius:var(--r);background:var(--surface);color:var(--ink);cursor:pointer;padding:0;margin-right:-4px}
.menu svg{width:18px;height:18px;display:block}
@media (max-width:680px){
  .menu{display:inline-flex}
  .top nav{display:none;position:absolute;left:0;right:0;top:60px;background:var(--surface);border-bottom:1px solid var(--line);flex-direction:column;padding:8px 16px 12px;gap:0;box-shadow:var(--shadow-float)}
  .top nav a{padding:12px 8px;font-size:15px;border-radius:var(--r-sm)}
  .top.open nav{display:flex}
}

/* ---------- hero */
.hero{padding-top:8px}
.hero h1{margin-top:36px}
.meta{display:flex;flex-wrap:wrap;gap:6px 18px;margin:0 0 24px;padding:0;list-style:none;font-size:13px;color:var(--ink-3)}
.meta li{display:flex;align-items:center;gap:6px}
.meta li::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--line-2);flex:0 0 auto}
.meta li.on{color:var(--accent);font-weight:500}
.meta li.on::before{background:var(--accent)}

/* ---------- calculator layout */
.calc{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:24px;align-items:start;margin:0 0 24px}
@media (max-width:860px){.calc{grid-template-columns:1fr;gap:16px}}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);min-width:0}
.panel-in{padding:24px}
.result{position:sticky;top:76px}
@media (max-width:860px){.result{position:static}}
@media (max-width:560px){.wrap{padding:0 18px}.panel-in{padding:18px 16px}}

/* compound row at the top of the input panel */
.cmp{display:flex;align-items:center;gap:12px;padding:16px 24px;border-bottom:1px solid var(--line)}
.cmp .k{font-size:13px;color:var(--ink-3);font-weight:500;flex:0 0 auto}
.cmp .name{font-weight:600;font-size:16px;color:var(--ink);letter-spacing:-.01em;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.cmp .klass{font-size:13px;color:var(--ink-3);min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;margin-left:auto;text-align:right}
@media (max-width:560px){.cmp{padding:14px 16px}.cmp .klass{display:none}.cbx-btn span{display:none}.hero h1{margin-top:24px}.sub{font-size:16px}}

/* combobox */
.cbx{position:relative;flex:1 1 auto;min-width:0}
.cbx-btn{
  width:100%;display:flex;align-items:center;gap:10px;min-height:var(--tap);padding:8px 12px 8px 14px;
  background:var(--surface);border:1px solid var(--line-2);border-radius:var(--r);cursor:pointer;
  font-family:inherit;font-size:16px;color:var(--ink);text-align:left;
}
.cbx-btn:hover{border-color:var(--ink-3)}
.cbx-btn b{font-weight:600;letter-spacing:-.01em;flex:0 1 auto;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.cbx-btn span{color:var(--ink-3);font-size:13px;flex:1 1 auto;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.cbx-btn svg{width:16px;height:16px;flex:0 0 auto;color:var(--ink-3)}
.cbx-btn[aria-expanded="true"]{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-tint)}
.cbx-pop{
  position:absolute;left:0;right:0;top:calc(100% + 6px);z-index:50;background:var(--surface);
  border:1px solid var(--line-2);border-radius:var(--r-lg);box-shadow:var(--shadow-float);overflow:hidden;
  transform-origin:top;animation:pop .15s var(--ease);
}
@keyframes pop{from{opacity:0;transform:scale(.97)}to{opacity:1;transform:none}}
.cbx-q{display:flex;align-items:center;gap:8px;padding:8px 10px;border-bottom:1px solid var(--line)}
.cbx-q svg{width:16px;height:16px;color:var(--ink-3);flex:0 0 auto}
.cbx-q input{border:0;background:transparent;min-height:36px;padding:0 4px;font-size:16px;width:100%;color:var(--ink);font-family:inherit}
.cbx-q input:focus{outline:0}
.cbx-list{max-height:340px;overflow-y:auto;padding:6px;overscroll-behavior:contain}
.cbx-g{font-size:12px;color:var(--ink-3);font-weight:500;padding:10px 10px 4px;letter-spacing:.01em}
.chip{
  display:flex;align-items:center;gap:10px;width:100%;text-align:left;padding:9px 10px;border:0;background:transparent;
  border-radius:var(--r-sm);font-family:inherit;font-size:15px;color:var(--ink);cursor:pointer;min-height:40px;
}
.chip span{color:var(--ink-3);font-size:13px;margin-left:auto;white-space:nowrap;flex:0 0 auto}
.chip:hover,.chip.hi{background:var(--surface-2)}
.chip[aria-selected="true"]{background:var(--accent-tint);color:var(--accent);font-weight:500}
.chip[aria-selected="true"] span{color:var(--accent)}
.chip mark{background:transparent;color:inherit;font-weight:600}
.cbx-none{padding:14px 10px;color:var(--ink-3);font-size:14px}
@media (max-width:560px){
  .cbx-pop{position:fixed;left:0;right:0;bottom:0;top:auto;border-radius:var(--r-xl) var(--r-xl) 0 0;max-height:80vh;display:flex;flex-direction:column;animation:sheet .2s var(--ease);padding-bottom:env(safe-area-inset-bottom)}
  .cbx-pop::before{content:"";display:block;width:36px;height:4px;border-radius:2px;background:var(--line-2);margin:10px auto 4px}
  .cbx-list{max-height:none;flex:1 1 auto}
  .cbx-q input{min-height:44px}
  .cbx-back{position:fixed;inset:0;background:rgba(15,23,32,.35);z-index:49;animation:fade .2s ease}
  @keyframes sheet{from{transform:translateY(24px);opacity:0}to{transform:none;opacity:1}}
  @keyframes fade{from{opacity:0}to{opacity:1}}
}
.cbx-back{display:none}
@media (max-width:560px){.cbx-back{display:block}}

/* segmented control */
.modes{display:flex;gap:2px;padding:3px;background:var(--surface-2);border-radius:var(--r);margin:0 0 20px;position:relative}
.mode{
  flex:1;min-height:38px;border:1px solid transparent;border-radius:var(--r-sm);background:transparent;
  font-family:inherit;font-size:14px;font-weight:500;color:var(--ink-2);cursor:pointer;padding:0 10px;
}
.mode:hover{color:var(--ink)}
.mode[aria-pressed="true"]{background:var(--surface);color:var(--ink);border-color:var(--line-2);box-shadow:0 1px 2px rgba(15,23,32,.06)}

/* fields */
.fields{display:grid;grid-template-columns:1fr 1fr;gap:18px 16px}
.f{display:flex;flex-direction:column;gap:6px;min-width:0}
.full{grid-column:1/-1}
label{font-size:13px;line-height:1.4;color:var(--ink-2);font-weight:500}
.in{
  display:flex;align-items:stretch;min-height:48px;background:var(--surface);border:1px solid var(--line-2);
  border-radius:var(--r);overflow:hidden;
}
.in:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-tint)}
.in input{
  flex:1 1 auto;min-width:0;width:100%;border:0;background:transparent;padding:0 12px 0 14px;
  font-family:inherit;font-size:18px;font-weight:500;color:var(--ink);min-height:46px;
}
.in input:focus{outline:0}
.in input::placeholder{color:var(--ink-3);font-weight:400;font-size:16px}
.in .unit{display:flex;align-items:center;padding:0 14px 0 4px;font-size:14px;color:var(--ink-3);font-weight:500;white-space:nowrap}
.in .unit.pre{padding:0 2px 0 14px}
.in .unit.pre+input{padding-left:4px}
.in select{
  border:0;border-left:1px solid var(--line);background:var(--surface-2);color:var(--ink);font-family:inherit;font-size:14px;font-weight:500;
  padding:0 30px 0 12px;cursor:pointer;-webkit-appearance:none;appearance:none;flex:0 0 auto;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236B7480' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'><path d='M6 9l6 6 6-6'/></svg>");
  background-repeat:no-repeat;background-position:right 10px center;
}
.in select:focus{outline:0}
.in.sel select{width:100%;border-left:0;background-color:transparent;font-size:16px;padding-left:14px;min-height:46px;font-weight:500}
input[type=number]::-webkit-inner-spin-button,input[type=number]::-webkit-outer-spin-button{-webkit-appearance:none;margin:0}
input[type=number]{-moz-appearance:textfield}
.presets{display:flex;flex-wrap:wrap;gap:6px;align-items:center;margin-top:2px}
.mini{display:flex;gap:6px;flex-wrap:wrap;align-items:center}
.mini i{font-style:normal;font-size:12px;color:var(--ink-3)}
.mini i.ml{display:none}
.mini button{
  min-height:30px;padding:0 10px;border:1px solid var(--line-2);border-radius:var(--r-sm);background:var(--surface);
  color:var(--ink-2);font-family:inherit;font-size:13px;font-weight:500;cursor:pointer;
}
.mini button:hover{border-color:var(--accent);color:var(--accent)}
.mini button.on{background:var(--accent-tint);border-color:var(--accent-line);color:var(--accent)}
.more{margin-top:20px;border-top:1px solid var(--line);padding-top:16px}
.more summary{list-style:none;cursor:pointer;font-size:14px;font-weight:500;color:var(--ink-2);display:flex;align-items:center;gap:8px;min-height:32px;user-select:none;flex-wrap:wrap}
.more summary::-webkit-details-marker{display:none}
.more summary svg{width:14px;height:14px;transition:transform .18s var(--ease);color:var(--ink-3)}
.more[open] summary svg{transform:rotate(90deg)}
.more summary:hover{color:var(--ink)}
.more .fields{margin-top:14px}
.more .val{color:var(--ink-3);font-weight:400;margin-left:auto;font-size:13px;text-align:right;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0}
@media (max-width:560px){.more .val{flex-basis:100%;margin-left:22px;text-align:left}}
.calc .hint{padding:14px 24px 16px;margin:0;border-top:1px solid var(--line);font-size:13px;color:var(--ink-3)}
.calc .hint.tip{padding:0;margin:18px 0 0;border:0}
@media (max-width:560px){.calc .hint{padding:12px 16px 14px}}

/* ---------- result panel */
.reslab{display:block;font-size:13px;font-weight:500;color:var(--ink-3);margin:0 0 6px}
.big{display:flex;align-items:baseline;gap:8px;flex-wrap:wrap;margin:0 0 6px;animation:xfade .16s var(--ease)}
@keyframes xfade{from{opacity:.35}to{opacity:1}}
.big b{font-size:clamp(52px,7vw,64px);line-height:1;letter-spacing:-.03em;font-weight:600;color:var(--ink)}
.big em{font-style:normal;font-size:20px;font-weight:500;color:var(--ink-2)}
.big small{font-size:14px;color:var(--ink-3);flex-basis:100%;margin-top:2px}
.lead{font-size:15px;color:var(--ink-2);margin:0 0 18px}
.barrel{margin:4px 0 18px;color:var(--accent)}
.barrel svg{display:block;width:100%;max-width:460px;height:auto}
.fig{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px 12px;margin:0;padding:18px 0 0;border-top:1px solid var(--line)}
.fig div{min-width:0}
.fig dt{font-size:12.5px;color:var(--ink-3);font-weight:500;line-height:1.3}
.fig dd{margin:3px 0 0;font-size:18px;font-weight:500;letter-spacing:-.01em;color:var(--ink);line-height:1.2;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.fig dd small{font-size:13px;color:var(--ink-3);font-weight:400;margin-left:2px}
.split{margin-top:16px;padding:12px 14px;background:var(--surface-2);border-radius:var(--r);font-size:14px;display:flex;flex-wrap:wrap;gap:4px 16px;align-items:baseline}
.split b{flex-basis:100%;font-size:12.5px;color:var(--ink-3);font-weight:500}
.split span{color:var(--ink-2)}
.split em{font-style:normal;font-weight:600;color:var(--ink)}
.split small{flex-basis:100%;color:var(--ink-3);font-size:12px}
.msg{border-radius:var(--r);padding:10px 12px;font-size:14px;line-height:1.5;margin-top:14px;display:flex;gap:10px;align-items:flex-start}
.msg::before{content:"";flex:0 0 auto;width:8px;height:8px;border-radius:50%;margin-top:7px;background:currentColor}
.msg.warn{background:var(--warn-tint);color:var(--warn)}
.msg.err{background:var(--err-tint);color:var(--err)}
.result .empty{color:var(--ink-3)}
.costrow{display:flex;align-items:center;gap:12px;padding:14px 24px;border-top:1px solid var(--line);flex-wrap:wrap}
.costrow label{flex:1 1 140px;font-size:13px;color:var(--ink-2)}
.costrow .in{flex:0 0 150px;min-height:40px}
.costrow .in input{min-height:38px;font-size:16px}
.costrow output{font-size:14px;font-weight:600;color:var(--ink);flex:0 0 auto;white-space:nowrap}
.acts{display:flex;gap:8px;padding:14px 24px;border-top:1px solid var(--line);flex-wrap:wrap;align-items:center}
.acts button{
  display:inline-flex;align-items:center;gap:6px;min-height:36px;padding:0 12px;border:1px solid var(--line-2);background:var(--surface);
  color:var(--ink);border-radius:var(--r-sm);font-family:inherit;font-size:14px;font-weight:500;cursor:pointer;
}
.acts button:hover{background:var(--surface-2)}
.acts button svg{width:14px;height:14px}
.acts button.done{color:var(--ok);border-color:var(--ok)}
.acts .fine{margin-left:auto;font-size:12.5px;color:var(--ink-3);text-align:right}
.acts .fine a{color:var(--ink-3)}
@media (max-width:560px){.costrow,.acts{padding-left:16px;padding-right:16px}.acts .fine{flex-basis:100%;text-align:left;margin-left:0}}

/* mobile sticky summary */
.stick{
  position:fixed;left:0;right:0;bottom:0;z-index:40;display:none;align-items:baseline;gap:8px;
  padding:12px 18px calc(12px + env(safe-area-inset-bottom));background:var(--surface);color:var(--ink);
  border-top:1px solid var(--line-2);box-shadow:0 -8px 24px rgba(15,23,32,.08);font-size:14px;
}
.stick b{font-size:22px;line-height:1;font-weight:600;letter-spacing:-.02em}
.stick span{margin-left:auto;color:var(--ink-3);font-size:13px}
.stick.on{display:flex}
@media (min-width:861px){.stick{display:none!important}}
.embed .stick{display:none!important}

/* ---------- blocks under the calculator */
.under{display:flex;flex-wrap:wrap;gap:6px 20px;align-items:baseline;margin:0 0 32px;font-size:13px;color:var(--ink-3)}
.under b{color:var(--ink-2);font-weight:500}
.under code{white-space:nowrap}
.under .sep{flex:1 1 auto}
.under a{white-space:nowrap;color:var(--ink-3)}

.grab{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(280px,400px);gap:20px 40px;align-items:center;
  padding:24px 28px;margin:0 0 20px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  font-size:14.5px;color:var(--ink-2);
}
@media (max-width:760px){.grab{grid-template-columns:1fr;padding:20px}}
.grab b{color:var(--ink);font-size:16px;display:block;margin-bottom:4px;letter-spacing:-.01em}
.grab p{margin:0;font-size:14px;max-width:none}
.grabrow{display:flex;gap:8px;flex-wrap:wrap}
.grabrow input{flex:1 1 180px;min-height:var(--tap);padding:0 14px;font-size:16px;font-family:inherit;color:var(--ink);background:var(--surface);border:1px solid var(--line-2);border-radius:var(--r)}
.grabrow input:focus{outline:0;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-tint)}
.grab .hint{display:block;margin:8px 0 0;font-size:12.5px}
.grab form{min-width:0}
.hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}
.grabdone{display:flex;flex-wrap:wrap;align-items:center;gap:10px;grid-column:1/-1}
.grabdone b{display:inline;margin:0;font-size:15px}
.grabdone .hint{flex-basis:100%;margin:0}
.grab .msg{grid-column:1/-1;margin:0}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:var(--tap);padding:0 20px;
  background:var(--accent);color:var(--accent-ink);text-decoration:none;font-weight:500;font-size:15px;border-radius:var(--r);
  border:0;cursor:pointer;font-family:inherit;white-space:nowrap;
}
.btn:hover{background:var(--accent-hover)}
.btn:active{transform:scale(.98)}
.btn.sec{background:var(--surface);color:var(--ink);border:1px solid var(--line-2)}
.btn.sec:hover{background:var(--surface-2)}

.next{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:10px;margin:0 0 40px}
.next a{
  display:flex;flex-direction:column;gap:2px;padding:14px 16px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  text-decoration:none;color:var(--ink);font-size:14.5px;
}
.next a:hover{border-color:var(--line-2);background:var(--surface-2)}
.next a b{font-weight:600;display:flex;align-items:center;gap:6px}
.next a b::after{content:"";width:6px;height:6px;border-right:1.5px solid var(--ink-3);border-top:1.5px solid var(--ink-3);transform:rotate(45deg);margin-left:auto}
.next a span{color:var(--ink-3);font-size:13px;line-height:1.45}

.trust{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px 32px;margin:8px 0 40px;padding:24px 0 0;border-top:1px solid var(--line)}
.trust div{min-width:0}
.trust b{display:block;font-size:14px;margin-bottom:4px;color:var(--ink);font-weight:600}
.trust span{font-size:13.5px;color:var(--ink-2);line-height:1.5;display:block}

.note{border:1px solid var(--line);background:var(--surface);padding:16px 20px;border-radius:var(--r-lg);margin:24px 0;font-size:15px;color:var(--ink-2);max-width:var(--prose)}
.note b{color:var(--ink)}
.disc{margin:56px 0 0;padding:20px 24px;border:1px solid var(--line);border-radius:var(--r-lg);background:var(--surface);font-size:13.5px;line-height:1.55;color:var(--ink-2)}
.disc b{color:var(--ink);display:block;margin-bottom:4px}

/* ---------- tables */
.scroll{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-lg);background:var(--surface);margin:16px 0 20px;-webkit-overflow-scrolling:touch;max-width:var(--prose)}
table{border-collapse:collapse;width:100%;font-size:14.5px}
th,td{padding:11px 14px;text-align:left;border-bottom:1px solid var(--line);white-space:nowrap;vertical-align:top}
th{font-size:12.5px;font-weight:500;color:var(--ink-3);background:var(--surface-2);letter-spacing:.01em}
td.num{text-align:right}
th:not(:first-child){text-align:right}
tbody tr:last-child td{border-bottom:0}
tbody tr:hover td{background:var(--bg)}
td b{font-weight:600;color:var(--ink)}
.scroll table{min-width:420px}

/* ---------- cards, lists, faq */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:10px;margin:16px 0 24px}
.cards a{display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:14px 16px;text-decoration:none;color:var(--ink)}
.cards a:hover{border-color:var(--line-2);background:var(--surface-2)}
.cards a b{display:block;font-size:15px;margin-bottom:2px;font-weight:600}
.cards a span{font-size:13px;color:var(--ink-3);line-height:1.45}
.all{list-style:none;margin:6px 0 8px;padding:0;columns:2;column-gap:32px;font-size:14.5px}
.all li{break-inside:avoid;margin:0 0 10px;line-height:1.45;padding-left:0}
.all li span{display:block;color:var(--ink-2);font-size:13px}
.all li b{font-weight:600}
.all li a{color:var(--ink);text-decoration:none;font-weight:500}
.all li a:hover{color:var(--accent);text-decoration:underline}
@media (max-width:560px){.all{columns:1}}
.faq{margin:0;max-width:var(--prose)}
.faq dt{font-weight:600;margin-top:20px;font-size:16px}
.faq dd{margin:6px 0 0;color:var(--ink-2)}
.xq{margin:14px 0 0;font-size:14px;color:var(--ink-2);max-width:62ch}
.xq a{font-weight:500}

/* ---------- graphics */
.curve,.barrels{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:20px;margin:16px 0 20px;max-width:var(--prose)}
.curve svg,.barrels svg{display:block;width:100%;height:auto;color:var(--accent)}

/* ---------- footer */
footer{border-top:1px solid var(--line);margin-top:72px;padding:32px 0 56px;font-size:13.5px;color:var(--ink-3);background:var(--surface)}
footer .fbrand{display:flex;align-items:center;gap:8px;color:var(--ink);font-weight:600;margin-bottom:14px}
footer .fbrand svg{width:18px;height:18px;color:var(--accent)}
footer .fbrand small{font-weight:400;color:var(--ink-3);margin-left:4px}
footer nav{display:flex;flex-wrap:wrap;gap:2px 18px;margin-bottom:14px}
footer a{color:var(--ink-2);text-decoration:none;padding:4px 0;display:inline-block}
footer a:hover{color:var(--accent)}
footer p{max-width:72ch;margin:0}

/* ---------- embed mode (?embed=1) */
.embed header.top,.embed footer,.embed nav,.embed .grab,.embed .trust,.embed .stick,.embed .tip,.embed main.wrap > *:not(.hero):not(#calc):not(.embed-credit){display:none!important}
.embed .hero .sub{display:none}
.embed body{background:#fff}.embed main.wrap{padding:8px 12px;max-width:100%}.embed h1{font-size:1.25rem;margin:8px 0 12px}.embed .calc{gap:12px}
.embed-credit{display:none;font-size:12px;color:var(--ink-3);margin:10px 0 0}.embed .embed-credit{display:block}
.embed .calc{grid-template-columns:1fr}
.embed .result{position:static}
pre.snippet{background:#0F1720;color:#E8EAED;padding:14px 16px;border-radius:var(--r);overflow-x:auto;font-size:13px;line-height:1.55;white-space:pre-wrap;word-break:break-all;max-width:var(--prose)}
pre.snippet code{background:transparent;color:inherit;padding:0}
.embed-demo{margin:16px 0}

/* ---------- print */
@media print{
  .top,footer,.acts,.costrow,.modes,.note,.cards,.disc,.faq,.hint,.stick,.meta,.under,.grab,.next,.trust,.cbx-pop,.menu,.more{display:none!important}
  body{background:#fff;color:#000;font-size:12pt}
  .calc{grid-template-columns:1fr}
  .panel,.scroll,.curve{border-color:#999;break-inside:avoid;box-shadow:none}
  .result{position:static}
  .big b{color:#000}
  a[href]:after{content:""}
  .wrap{max-width:none;padding:0}
}

/* Printable chart images (2026-09-14) */
.chartimg{margin:22px 0;padding:0}
.chartimg img{display:block;width:100%;max-width:520px;height:auto;margin:0 auto;
  border:1px solid var(--line-2);border-radius:var(--r-lg);background:var(--surface)}
.chartimg figcaption{margin:12px auto 0;max-width:var(--prose);font-size:.9rem;
  color:var(--ink-2);text-align:center;line-height:1.5}
.chartimg figcaption a{color:var(--accent)}
@media print{.chartimg img{max-width:100%;border:none}}