/* fcalculator.com v3 chrome: tokens, fonts, base, header, menus, search, footer.
   Loaded on every page. New pages add v3.css, legacy pages add style.css + bridge.css.
   Spec: /var/www/fcalculator.com/FCALC-V3.md */

@font-face{font-family:'Geist';font-style:normal;font-weight:100 900;font-display:swap;src:url(/static/fonts/geist-latin.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Geist';font-style:normal;font-weight:100 900;font-display:swap;src:url(/static/fonts/geist-latin-ext.woff2) format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:'Geist Mono';font-style:normal;font-weight:100 900;font-display:swap;src:url(/static/fonts/geist-mono-latin.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Geist Mono';font-style:normal;font-weight:100 900;font-display:swap;src:url(/static/fonts/geist-mono-latin-ext.woff2) format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
/* metric-matched fallback so the swap does not shift the layout */
@font-face{font-family:'Geist Fallback';src:local('Arial');size-adjust:104%;ascent-override:94%;descent-override:22%;line-gap-override:0%}

:root{
  --bg:#fff;
  --ink:hsl(0 0% 4%);
  --ink-2:hsl(0 0% 4% / .76);
  --ink-3:hsl(216 4% 49%);
  --ink-4:hsl(216 5% 70%);
  --line:hsl(222 19% 91%);
  --line-2:hsl(222 19% 85%);
  --surface:hsl(40 18% 97%);
  --surface-2:hsl(40 14% 93%);
  --surface-3:hsl(40 10% 88%);
  --up:#0f7a3d; --up-bg:#e7f4eb;
  --down:#c12525; --down-bg:#fbe9e9;
  --warn:#9a5700; --warn-bg:#fbf0dc;
  --focus:hsl(216 7% 62%);
  --focus-ring:0 0 0 4px hsl(216 10% 50% / .14);
  --font:'Geist','Geist Fallback',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  --mono:'Geist Mono',ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --r:10px; --r-lg:16px; --r-xl:22px;
  --hdr:56px;
  --gut:16px;
  --maxw:1280px;
  --ease:cubic-bezier(.2,.7,.2,1);
}
@media (min-width:768px){:root{--gut:24px;--hdr:60px}}
@media (min-width:1280px){:root{--gut:32px}}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scrollbar-gutter:stable;scroll-padding-top:calc(var(--hdr) + 16px)}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);font-size:16px;line-height:1.55;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility;
  font-feature-settings:"ss01" on}
img,svg{max-width:100%}
a{color:inherit}
button{font:inherit;color:inherit}
.mono,.num{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:-.01em}
[hidden]{display:none!important}
.sr{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
:focus-visible{outline:2px solid hsl(0 0% 4% / .55);outline-offset:2px;border-radius:6px}
input:focus-visible,select:focus-visible,textarea:focus-visible{outline:none}
.skip{position:absolute;left:-999px;top:8px;z-index:999;background:var(--ink);color:#fff;padding:8px 14px;border-radius:999px;text-decoration:none}
.skip:focus{left:8px}
.sym{width:18px;height:18px;flex:none;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;vertical-align:middle}

/* ── header ── */
.hd{position:sticky;top:0;z-index:100;height:var(--hdr);background:hsl(0 0% 100% / .88);
  -webkit-backdrop-filter:saturate(1.6) blur(14px);backdrop-filter:saturate(1.6) blur(14px);border-bottom:1px solid var(--line)}
.hd-in{max-width:var(--maxw);margin:0 auto;height:100%;padding:0 var(--gut);display:flex;align-items:center;gap:8px}
.logo{display:inline-flex;align-items:center;gap:9px;text-decoration:none;color:var(--ink);font-weight:560;font-size:17px;letter-spacing:-.02em;flex:none;margin-right:12px}
.logo-m{width:26px;height:26px;border-radius:7px;background:var(--ink);color:#fff;display:grid;place-items:center;font-size:14px;font-weight:600;letter-spacing:-.04em;line-height:1}
.logo-t span{color:var(--ink-3);font-weight:450}
.nav{display:none;align-items:center;gap:2px;height:100%}
.nav-i{position:relative;height:100%;display:flex;align-items:center}
.nav-a{display:inline-flex;align-items:center;gap:4px;padding:7px 11px;border-radius:999px;font-size:14.5px;color:var(--ink-2);text-decoration:none;white-space:nowrap;transition:background .15s,color .15s}
.nav-a:hover,.nav-i:focus-within>.nav-a,.nav-a[aria-current]{color:var(--ink);background:var(--surface)}
.nav-a .car{width:10px;height:10px;opacity:.5}
.mega{position:absolute;top:calc(100% + 1px);left:-8px;min-width:560px;background:#fff;border:1px solid var(--line);border-top:0;
  border-radius:0 0 var(--r-lg) var(--r-lg);padding:18px;display:grid;grid-template-columns:1fr 1fr;gap:4px 18px;
  opacity:0;visibility:hidden;transform:translateY(-4px);transition:opacity .16s var(--ease),transform .16s var(--ease),visibility 0s .16s}
.nav-i:nth-last-child(-n+4)>.mega{left:auto;right:-8px}
.nav-i:hover>.mega,.nav-i:focus-within>.mega{opacity:1;visibility:visible;transform:none;transition-delay:.06s,.06s,0s}
.mega a{display:block;padding:9px 10px;border-radius:var(--r);text-decoration:none}
.mega a:hover{background:var(--surface)}
.mega b{display:block;font-weight:500;font-size:14.5px}
.mega small{display:block;color:var(--ink-3);font-size:13px;line-height:1.4;margin-top:1px}
.mega .mega-f{grid-column:1/-1;border-top:1px solid var(--line);margin-top:8px;padding-top:12px;display:flex;justify-content:space-between;align-items:center;font-size:13.5px;color:var(--ink-3)}
.mega .mega-f a{display:inline;padding:0;color:var(--ink);text-decoration:underline;text-decoration-color:var(--ink-4);text-underline-offset:3px}
.mega .mega-f a:hover{background:none}
.hd-end{margin-left:auto;display:flex;align-items:center;gap:6px}
.sbtn{display:inline-flex;align-items:center;gap:8px;height:36px;padding:0 10px 0 12px;border:1px solid var(--line-2);border-radius:999px;background:#fff;color:var(--ink-3);font-size:14px;cursor:pointer;transition:border-color .15s}
.sbtn:hover{border-color:var(--ink-4);color:var(--ink-2)}
.sbtn .sym{width:16px;height:16px}
.sbtn kbd{font-family:var(--mono);font-size:11.5px;border:1px solid var(--line);border-radius:5px;padding:1px 5px;color:var(--ink-3);background:var(--surface)}
.sbtn .sbtn-t,.sbtn kbd{display:none}
.ibtn{width:38px;height:38px;border:0;background:transparent;border-radius:999px;display:grid;place-items:center;cursor:pointer;color:var(--ink)}
.ibtn:hover{background:var(--surface)}
.pill{display:inline-flex;align-items:center;gap:7px;height:36px;padding:0 15px;border-radius:999px;background:var(--ink);color:#fff;font-size:14px;font-weight:500;text-decoration:none;border:0;cursor:pointer;white-space:nowrap}
.pill:hover{background:hsl(0 0% 20%)}
.pill-2{background:var(--surface);color:var(--ink)}
.pill-2:hover{background:var(--surface-2)}
.pill .sym{width:16px;height:16px}
#install-btn{display:none}
body.can-install #install-btn{display:inline-flex}
@media (min-width:640px){.sbtn .sbtn-t{display:inline}.sbtn{padding:0 8px 0 12px;min-width:210px}.sbtn kbd{display:inline;margin-left:auto}}
@media (min-width:1100px){.nav{display:flex}.hd-menu{display:none}.sbtn{min-width:0;padding:0 11px}.sbtn .sbtn-t,.sbtn kbd{display:none}.nav-a{padding:7px 8px;font-size:14px}.logo{margin-right:6px}}
@media (min-width:1360px){.sbtn{min-width:200px;padding:0 8px 0 12px}.sbtn .sbtn-t,.sbtn kbd{display:inline}.nav-a{padding:7px 11px;font-size:14.5px}}

/* ── sheet menu (phones, tablets) ── */
.sheet{position:fixed;inset:0;z-index:200;background:#fff;display:flex;flex-direction:column;transform:translateY(-8px);opacity:0;visibility:hidden;transition:opacity .18s,transform .18s var(--ease),visibility 0s .18s}
.sheet.open{opacity:1;visibility:visible;transform:none;transition-delay:0s}
.sheet-top{flex-shrink:0;height:calc(var(--hdr) + 1px);border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 var(--gut)}
.sheet-b{flex:1 1 auto;overflow-y:auto;padding:8px var(--gut) 40px;-webkit-overflow-scrolling:touch}
.sheet details{border-bottom:1px solid var(--line)}
.sheet summary{list-style:none;display:flex;justify-content:space-between;align-items:center;padding:16px 2px;font-size:18px;font-weight:500;cursor:pointer}
.sheet summary::-webkit-details-marker{display:none}
.sheet summary .sym{transition:transform .2s}
.sheet details[open] summary .sym{transform:rotate(45deg)}
.sheet .sh-l{padding:0 0 14px;display:grid;gap:2px}
.sheet .sh-l a{padding:9px 2px;text-decoration:none;color:var(--ink-2);font-size:15.5px;display:flex;justify-content:space-between}
.sheet .sh-l a small{color:var(--ink-3);font-size:13px}
.sheet .sh-x{display:flex;flex-direction:column;gap:2px;padding-top:14px}
.sheet .sh-x a{padding:10px 2px;text-decoration:none;font-size:16px;color:var(--ink-2)}
body.lock{overflow:hidden}

/* ── search palette ── */
.pal{position:fixed;inset:0;z-index:300;display:none;background:hsl(0 0% 4% / .28);-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);padding:0}
.pal.open{display:block}
.pal-box{background:#fff;max-width:640px;margin:0 auto;height:100%;display:flex;flex-direction:column;overflow:hidden}
@media (min-width:768px){.pal{padding:12vh 16px 0}.pal-box{height:auto;max-height:70vh;border-radius:var(--r-lg);border:1px solid var(--line)}}
.pal-in{display:flex;align-items:center;gap:10px;padding:0 14px;border-bottom:1px solid var(--line);flex:none}
.pal-in input{flex:1;border:0;outline:0;height:58px;font:inherit;font-size:17px;background:transparent;color:var(--ink)}
.pal-in input::placeholder{color:var(--ink-4)}
.pal-in kbd,.pal-esc{font-family:var(--mono);font-size:11.5px;border:1px solid var(--line);border-radius:5px;padding:2px 6px;color:var(--ink-3);background:var(--surface);cursor:pointer}
.pal-r{overflow-y:auto;padding:6px}
.pal-g{font-size:12.5px;color:var(--ink-3);padding:10px 10px 4px}
.pal-r a{display:flex;align-items:center;gap:10px;padding:10px;border-radius:var(--r);text-decoration:none;color:var(--ink)}
.pal-r a small{margin-left:auto;color:var(--ink-3);font-size:12.5px}
.pal-r a.on,.pal-r a:hover{background:var(--surface)}
.pal-r mark{background:none;color:var(--ink);font-weight:600}
.pal-empty{padding:28px 14px;color:var(--ink-3);text-align:center}

/* ── footer ── */
.ft{border-top:1px solid var(--line);margin-top:72px;background:#fff}
.ft-in{max-width:var(--maxw);margin:0 auto;padding:48px var(--gut) 28px}
.ft-top{display:grid;gap:36px}
.ft-cols{display:grid;gap:28px 20px;grid-template-columns:1fr 1fr}
.ft-brand p{color:var(--ink-3);font-size:14.5px;max-width:360px;margin:14px 0 0}
.ft h2{font-size:13.5px;font-weight:500;color:var(--ink-3);margin:0 0 12px}
.ft ul{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.ft ul a{text-decoration:none;color:var(--ink-2);font-size:14.5px}
.ft ul a:hover{color:var(--ink);text-decoration:underline;text-underline-offset:3px;text-decoration-color:var(--ink-4)}
.ft-bot{margin-top:40px;padding-top:20px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;color:var(--ink-3);font-size:13px}
.ft-bot p{margin:0;max-width:760px}
.ft-bot nav{display:flex;gap:18px}
.ft-bot a{color:var(--ink-3);text-decoration:none}
.ft-bot a:hover{color:var(--ink)}
@media (min-width:768px){.ft-cols{grid-template-columns:repeat(4,1fr)}}
@media (min-width:1024px){.ft-top{grid-template-columns:300px 1fr;gap:64px}}

/* ── toast (shared) ── */
.fc-toast{position:fixed;left:50%;bottom:24px;transform:translate(-50%,20px);background:var(--ink);color:#fff;padding:10px 16px;border-radius:999px;font-size:14px;opacity:0;transition:.2s;z-index:400;pointer-events:none}
.fc-toast.on{opacity:1;transform:translate(-50%,0)}

@media print{.hd,.ft,.sheet,.pal,.no-print{display:none!important}body{font-size:12px}}