/* QuickCalc Hub: shared styles for every page.
   Layout: header with streak, main column with calculator + guide, sidebar with lists, footer with legal links.
   Colors are tokens so the site works in light and dark mode. */

:root{
  --bg:#EEF2F1; --surface:#FFFFFF; --fg:#13201E; --muted:#4F6360; --line:#CFDAD7;
  --accent:#0B7A66; --accent-fg:#FFFFFF; --accent-soft:#D9EFE9; --streak:#B93C06;
  --display:"Bricolage Grotesque","Arial Narrow",system-ui,sans-serif;
  --body:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,Menlo,Consolas,monospace;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#0E1615; --surface:#162220; --fg:#E6EFED; --muted:#9DB2AE; --line:#2A3B38;
  --accent:#3DD1B1; --accent-fg:#06201A; --accent-soft:#17382F; --streak:#FF8A4C; color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#0E1615; --surface:#162220; --fg:#E6EFED; --muted:#9DB2AE; --line:#2A3B38;
  --accent:#3DD1B1; --accent-fg:#06201A; --accent-soft:#17382F; --streak:#FF8A4C; color-scheme:dark}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font-family:var(--body);font-size:16px;line-height:1.6;
  padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px));
  padding-bottom:24px;overflow-x:hidden}
body.has-banner{padding-bottom:230px}
a{color:var(--accent)}
img{max-width:100%}
button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,a:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
[hidden]{display:none!important}
.skip{position:absolute;left:-9999px}
.skip:focus{left:16px;top:8px;background:var(--surface);padding:8px 12px;z-index:50}
.wrap{max-width:1120px;margin:0 auto}
main,article,aside{min-width:0}

h1,h2,h3{font-family:var(--display);letter-spacing:-.015em;line-height:1.15;text-wrap:balance;margin:0;color:var(--fg)}
h1{font-size:clamp(26px,4vw,36px)}
h2{font-size:clamp(20px,2.6vw,24px);margin-top:12px}
h3{font-size:18px}
p{margin:0}

/* header */
.top{display:flex;align-items:center;justify-content:space-between;gap:12px 20px;flex-wrap:wrap;padding-block:14px}
.brand{font-family:var(--display);font-weight:800;font-size:24px;letter-spacing:-.02em;color:var(--fg);text-decoration:none}
.brand{display:inline-flex;align-items:center;gap:10px}
.brand-mark{width:34px;height:34px;flex:none}
.brand-mark rect{fill:var(--accent)}
.brand-mark path{fill:none;stroke:var(--accent-fg);stroke-width:2.6;stroke-linecap:round}
.brand-mark .eq{stroke:#FFB38A}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .brand-mark .eq{stroke:var(--accent-fg)}}
:root[data-theme="dark"] .brand-mark .eq{stroke:var(--accent-fg)}
.brand-txt span{color:var(--accent)}
.mainnav{display:flex;gap:6px;flex-wrap:wrap}
.mainnav a{color:var(--fg);text-decoration:none;padding:6px 10px;border-radius:8px;font-weight:500}
.mainnav a:hover{background:var(--surface)}
.pill{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line);background:var(--surface);border-radius:999px;padding:6px 14px;font-weight:600;font-size:14px}
.pill b{font-family:var(--mono);color:var(--streak);font-size:16px}

/* layout */
.layout{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:28px;align-items:start;padding-block:12px 8px}
.side{display:flex;flex-direction:column;gap:16px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:16px}
.card h3{margin-bottom:10px}
.big{font-family:var(--display);font-weight:800;font-size:44px;color:var(--streak);line-height:1}
.dots{display:grid;grid-template-columns:repeat(7,1fr);gap:6px;margin-top:12px}
.dots i{height:8px;border-radius:4px;background:var(--line)}
.dots i.on{background:var(--streak)}
.cap{font-size:12px;color:var(--muted);margin-top:6px}
.empty{color:var(--muted);font-size:14px}
.list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px}
.list a.item{display:block;font-size:14px;background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:8px 10px;color:var(--fg);text-decoration:none;overflow-wrap:anywhere}
.list a.item:hover{border-color:var(--accent)}
.list .meta{display:block;color:var(--muted);font-size:12px;font-family:var(--mono)}
.list li.empty{font-size:13px}

/* buttons and fields */
.btn{font:inherit;font-weight:500;color:var(--fg);background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:9px 14px;cursor:pointer;min-height:40px}
.btn:hover{border-color:var(--accent)}
.btn.small{padding:6px 12px;min-height:34px;font-size:13px}
.btn[aria-pressed="true"]{background:var(--accent);color:var(--accent-fg);border-color:var(--accent)}
.btn.danger{color:var(--streak)}
.link{background:none;border:0;color:var(--accent);font:inherit;font-size:13px;cursor:pointer;padding:0;margin-top:10px;text-decoration:underline}
.btnrow,.actions,.headbtns{display:flex;gap:8px;flex-wrap:wrap}
.actions{margin-top:12px}
label{display:flex;flex-direction:column;gap:6px;font-size:13px;font-weight:600;color:var(--muted);min-width:0}
input,select,textarea{font:inherit;font-size:16px;color:var(--fg);background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:10px 12px;width:100%;min-width:0}
textarea{resize:vertical;line-height:1.5}
textarea.wide{grid-column:1/-1}

/* calculator */
.tool{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:22px}
.toolhead{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;flex-wrap:wrap}
.sub{color:var(--muted);margin-top:6px}
.fields{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:14px;margin-top:20px}
.results{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:12px;margin-top:20px}
.res{background:var(--accent-soft);border-radius:10px;padding:14px 16px;min-width:0}
.res .k{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;font-weight:600}
.res .v{font-family:var(--mono);font-size:22px;font-weight:500;overflow-wrap:anywhere;font-variant-numeric:tabular-nums}
.res.main{grid-column:1/-1}
.res.main .v{font-size:34px;color:var(--accent)}
.resfoot{margin-top:12px}
.formula{color:var(--muted);font-size:13px;margin-top:14px;font-family:var(--mono);overflow-wrap:anywhere}

/* article content */
.doc{margin-top:28px;display:grid;gap:12px;max-width:70ch}
.doc p,.doc li{margin:0}
.doc ul,.doc ol{margin:0;padding-left:22px;display:grid;gap:6px}
.doc h2{margin-top:18px}
.doc code,code{font-family:var(--mono);font-size:13px;overflow-wrap:anywhere}
.example{background:var(--surface);border:1px solid var(--line);border-left:4px solid var(--accent);border-radius:10px;padding:14px 16px}
.muted{color:var(--muted)}
details{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:12px 16px}
summary{cursor:pointer;font-weight:600}
details p{margin-top:8px;color:var(--muted)}
.tablewrap{overflow-x:auto;border:1px solid var(--line);border-radius:10px}
table{width:100%;border-collapse:collapse;font-size:14px;min-width:480px}
th,td{text-align:left;padding:9px 12px;border-bottom:1px solid var(--line);vertical-align:top}
th{color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.06em}
.danger-zone{border:1px solid var(--line);border-radius:12px;padding:16px;display:grid;gap:10px}
.related{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px;margin-top:8px}
.related a{display:block;background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:12px 14px;text-decoration:none;color:var(--fg);font-weight:600}
.related a:hover{border-color:var(--accent)}
.related span{display:block;font-weight:400;font-size:14px;color:var(--muted);margin-top:2px}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px}
.cards a{display:block;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:16px;text-decoration:none;color:var(--fg)}
.cards a:hover{border-color:var(--accent)}
.cards strong{font-family:var(--display);font-size:18px;display:block;margin-bottom:4px}
.cards span{color:var(--muted);font-size:14px}

/* footer */
.site-foot{display:flex;flex-wrap:wrap;gap:10px 20px;justify-content:space-between;align-items:center;color:var(--muted);font-size:13px;margin-top:40px;padding-block:24px;border-top:1px solid var(--line)}
.site-foot nav{display:flex;flex-wrap:wrap;gap:8px 16px}
.site-foot a{color:var(--fg)}

/* cookie banner */
.banner{position:fixed;left:0;right:0;bottom:0;z-index:20;background:var(--surface);border-top:1px solid var(--line);box-shadow:0 -8px 24px rgb(0 0 0 / .12);
  padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px));
  padding-top:14px;padding-bottom:max(14px,env(safe-area-inset-bottom,0px));
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between}
.banner p{margin:0;max-width:680px;font-size:14px}

@media (max-width:860px){
  .layout{grid-template-columns:minmax(0,1fr)}
  .tool{padding:18px}
  .big{font-size:38px}
}
@media (prefers-reduced-motion:no-preference){.res{transition:background .2s}}