/* MyFastCalcTools · V17.18 · The Navigation Instrument
   Sitewide, independent of the calculator engine. */
.site-head.wtm-masthead{position:relative;top:auto;z-index:30;overflow:visible;background:transparent;border:0;backdrop-filter:none;box-shadow:none}
.wtm-masthead-row{display:flex;justify-content:space-between;align-items:center;min-height:90px;gap:24px}
.wtm-masthead .wtm-identity{width:max-content;flex:none;gap:11px;text-decoration:none}
.wtm-masthead .wtm-identity .brand-mark{width:39px;height:39px;border-radius:11px;background:#254d3a;color:#f9f6e9;font:italic 27px/1 Georgia,serif;box-shadow:0 5px 11px #274a3415}
.wtm-masthead .wtm-identity .brand-type{display:flex;flex-direction:column;font:600 1.13rem/1.12 'Source Serif 4',Georgia,serif;letter-spacing:-.025em;color:#243a2b}
.wtm-masthead .wtm-identity .brand-type small{font:400 .57rem/1.4 'IBM Plex Mono',monospace;letter-spacing:.018em;color:#77857a;margin-top:3px}
.wtm-masthead-note{display:flex;align-items:center;gap:9px;color:#657b69;letter-spacing:.16em;font:600 .61rem/1.4 'IBM Plex Mono',monospace;white-space:nowrap}
.wtm-masthead-note-dot{height:6px;width:6px;background:#7fa48a;box-shadow:0 0 0 4px #deebdc;border-radius:50%}
.wtm-command-shelf{position:fixed;z-index:400;top:14px;left:50%;transform:translateX(-50%);display:flex;align-items:stretch;gap:0;min-height:62px;padding:5px 6px 5px 8px;border:1px solid #b9cdbf;border-radius:23px;background:rgba(252,252,247,.95);box-shadow:0 15px 44px rgba(26,55,38,.13),0 3px 9px rgba(26,55,38,.05),inset 0 1px 0 white;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);isolation:isolate;font-family:'IBM Plex Sans',sans-serif}
.wtm-command-shelf::after{content:'';pointer-events:none;position:absolute;inset:-5px;border-radius:27px;border:1px solid rgba(224,232,221,.7)}
.wtm-shelf-signature{min-width:73px;display:flex;align-items:center;justify-content:center;gap:3px;padding:0 12px 0 9px;margin-right:6px;border-right:1px solid #dae5d8;color:#244e35}
.wtm-shelf-signature strong{font:500 1.62rem/1 'Source Serif 4',Georgia,serif;letter-spacing:-.07em}
.wtm-shelf-signature span{writing-mode:vertical-rl;transform:rotate(180deg);font:600 .47rem/1 'IBM Plex Mono',monospace;letter-spacing:.1em;color:#688574}
.wtm-command-shelf .wtm-shelf-action{appearance:none;-webkit-appearance:none;position:relative;display:flex;align-items:center;justify-content:center;flex-direction:column;flex:0 0 91px;gap:2px;min-width:80px;min-height:51px;padding:5px 8px 3px;color:#385c46;background:transparent;border:0;border-radius:17px;text-decoration:none;outline-offset:2px;cursor:pointer;transition:background .25s ease,color .25s ease,transform .25s cubic-bezier(.22,.8,.25,1)}
.wtm-command-shelf .wtm-shelf-action::after{content:'';width:11px;height:3px;border-radius:99px;background:transparent;position:absolute;bottom:1px;transition:width .25s ease,background .25s ease}
.wtm-shelf-action svg{display:block;width:19px;height:19px;transition:transform .3s cubic-bezier(.2,.8,.2,1)}
.wtm-shelf-action span{font-size:.68rem;font-weight:650;letter-spacing:.01em;line-height:1.1}
.wtm-shelf-action small{position:absolute;right:6px;top:4px;font:600 .65rem 'IBM Plex Mono',monospace;color:#526b58}
.wtm-command-shelf .wtm-shelf-action:hover,.wtm-command-shelf .wtm-shelf-action[aria-expanded=true]{background:#e9f2e7;color:#1f5134}
.wtm-command-shelf .wtm-shelf-action:hover svg,.wtm-command-shelf .wtm-shelf-action[aria-expanded=true] svg{transform:translateY(-2px) rotate(-7deg)}
.wtm-command-shelf .wtm-shelf-action:hover::after,.wtm-command-shelf .wtm-shelf-action[aria-expanded=true]::after{width:25px;background:#598c66}
.wtm-command-shelf .wtm-shelf-action:focus-visible{outline:3px solid #bb8a5c;outline-offset:2px}
.wtm-command-shelf .wtm-shelf-action:active{transform:scale(.96)}
/* Navigation as a small, indexed field guide rather than a conventional menu. */
.wtm-nav-panel{box-sizing:border-box;position:fixed;inset:87px auto auto 50%;transform:translateX(-50%);margin:0;padding:0;width:min(688px,calc(100vw - 32px));max-width:none;max-height:calc(100dvh - 104px);border:1px solid #c2d3c2;border-radius:25px;color:#223a2b;background:#f8f9f3;box-shadow:0 32px 90px rgba(18,43,28,.22),0 5px 15px rgba(18,43,28,.09);overflow:auto;overscroll-behavior:contain}
.wtm-nav-panel::backdrop{background:rgba(18,35,25,.27);backdrop-filter:blur(5px);-webkit-backdrop-filter:blur(5px)}
.wtm-nav-panel[open]{animation:wtm-sheet-arrive .34s cubic-bezier(.2,.85,.2,1) both}
@keyframes wtm-sheet-arrive{from{opacity:0;transform:translate(-50%,-10px) scale(.98)}to{opacity:1;transform:translate(-50%,0) scale(1)}}
.wtm-nav-sheet{padding:26px 27px 19px}
.wtm-nav-head{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:19px}
.wtm-nav-head h2{font:500 clamp(1.65rem,2.7vw,2.2rem)/1.1 'Source Serif 4',Georgia,serif;letter-spacing:-.035em;color:#1b3b2a;margin:7px 0 6px}
.wtm-nav-head p{margin:0;color:#516657;font-size:.84rem;line-height:1.45}
.wtm-nav-kicker{display:flex;align-items:center;gap:8px;color:#668371;font:600 .58rem/1.4 'IBM Plex Mono',monospace;letter-spacing:.12em}
.wtm-nav-kicker span{width:17px;height:1px;background:#718e75}
.wtm-nav-dismiss{height:40px;width:40px;flex:none;display:grid;place-items:center;border-radius:14px;border:1px solid #cddccd;background:#fff;color:#315d3f;box-shadow:0 3px 9px #213b2610;transition:background .22s ease,transform .22s ease}
.wtm-nav-dismiss svg{width:17px;height:17px;transition:transform .3s}
.wtm-nav-dismiss:hover{background:#e8f2e7;transform:rotate(-5deg)}.wtm-nav-dismiss:hover svg{transform:rotate(90deg)}
.wtm-cat-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}
.wtm-cat-tile{position:relative;min-height:122px;display:flex;flex-direction:column;align-items:flex-start;gap:15px;padding:15px 14px 13px;border:1px solid #d8e4d8;border-radius:17px;text-decoration:none;color:#2d5039;background:linear-gradient(145deg,#fff,#f1f7ef);box-shadow:inset 0 1px 0 #fff;transition:border-color .22s,box-shadow .25s,background .22s,transform .25s cubic-bezier(.2,.75,.25,1)}
.wtm-cat-tile:hover{border-color:#aac7b1;background:linear-gradient(145deg,#fff,#e8f2e5);box-shadow:0 8px 20px #284d3317;transform:translateY(-3px)}
.wtm-cat-tile:focus-visible{outline:3px solid #bd8754;outline-offset:2px}
.wtm-cat-glyph{height:37px;width:37px;display:grid;place-items:center;border-radius:13px;border:1px solid #cddfce;background:#e7f0e6;color:#305c40}
.wtm-cat-glyph svg{height:21px;width:21px}
.wtm-cat-copy{display:flex;flex-direction:column;min-width:0;gap:3px}
.wtm-cat-copy strong{font:600 .83rem/1.2 'IBM Plex Sans',sans-serif;letter-spacing:-.01em}
.wtm-cat-copy small{color:#4f6756;font:500 .68rem/1.3 'IBM Plex Mono',monospace}
.wtm-cat-arrow{position:absolute;right:13px;top:18px;color:#94ad9b;opacity:.4;transition:transform .25s,opacity .25s}
.wtm-cat-arrow svg{width:16px;height:16px}.wtm-cat-tile:hover .wtm-cat-arrow{transform:translateX(2px);opacity:1}
.wtm-nav-tail{display:flex;justify-content:space-between;align-items:center;gap:14px;padding-top:16px;margin-top:17px;border-top:1px solid #d9e4d9}
.wtm-nav-tail a{display:flex;align-items:center;gap:9px;font-size:.76rem;font-weight:650;color:#285a3c;text-decoration:none}
.wtm-nav-tail a:hover{text-decoration:underline;text-underline-offset:3px}.wtm-nav-tail svg{width:15px;height:15px}
.wtm-nav-tail>span{color:#526b58;font:500 .65rem 'IBM Plex Mono',monospace}
.wtm-nav-footer{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:22px;padding-top:13px;border-top:1px solid #e0e8de;color:#536956;font:500 .66rem/1.5 'IBM Plex Mono',monospace}
.wtm-nav-footer span:first-child{display:flex;align-items:center;gap:6px}.wtm-nav-footer svg{width:15px;height:15px}
.wtm-secondary-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px}
.wtm-secondary-grid a{display:grid;position:relative;min-height:105px;grid-template-columns:1fr auto;gap:2px;padding:14px 16px;border:1px solid #d8e3d6;border-radius:15px;background:#fffefa;text-decoration:none;color:#2b5039;transition:border-color .2s,transform .22s,background .2s}
.wtm-secondary-grid a:hover{border-color:#a4c1a7;background:#edf5eb;transform:translateY(-2px)}
.wtm-secondary-number{grid-column:1/-1;color:#526b58;font:600 .65rem 'IBM Plex Mono',monospace}
.wtm-secondary-grid strong{grid-column:1;align-self:end;font-size:.85rem}
.wtm-secondary-grid small{grid-column:1;color:#516657;font-size:.76rem}
.wtm-secondary-grid svg{grid-column:2;grid-row:2/4;width:17px;height:17px;align-self:center}
.wtm-nav-content[hidden]{display:none!important}
@media(max-width:1080px) and (min-width:821px){.wtm-command-shelf{left:auto;right:14px;transform:none}.wtm-masthead-note{display:none}}
@media(max-width:820px){
 body{padding-bottom:calc(94px + env(safe-area-inset-bottom,0px))}
 .wtm-masthead-row{min-height:67px}
 .wtm-masthead-note{display:none}
 .wtm-command-shelf{top:auto;bottom:calc(11px + env(safe-area-inset-bottom,0px));width:min(390px,calc(100% - 24px));height:68px;min-height:68px;padding:5px;left:50%;border:1px solid #aac6b3;border-radius:23px;box-shadow:0 10px 36px #162f2533,0 2px 12px #162f2512;background:rgba(248,251,245,.97)}
 .wtm-command-shelf::after{display:none}
 .wtm-shelf-signature{display:none}
 .wtm-command-shelf .wtm-shelf-action{flex:1;min-width:0;min-height:56px;padding:7px 2px;gap:4px;border-radius:17px}
 .wtm-shelf-action svg{width:21px;height:21px}
 .wtm-shelf-action span{font-size:.67rem}
 .wtm-shelf-action small{display:none}
 .wtm-nav-panel{inset:auto 0 0 0;transform:none;width:100%;max-width:none;max-height:min(88dvh,740px);border:1px solid #c4d8c8;border-bottom:0;border-radius:25px 25px 0 0;overflow:auto;padding-bottom:env(safe-area-inset-bottom,0px);box-shadow:0 -15px 65px #172e2133}
 .wtm-nav-panel[open]{animation:wtm-sheet-mobile .38s cubic-bezier(.16,.8,.24,1) both}
 @keyframes wtm-sheet-mobile{from{opacity:.6;transform:translateY(34px)}to{opacity:1;transform:translateY(0)}}
 .wtm-nav-sheet{padding:29px 21px 23px}
 .wtm-nav-sheet::before{content:'';position:absolute;top:9px;left:50%;transform:translateX(-50%);height:4px;width:41px;border-radius:10px;background:#bfcebd}
 .wtm-cat-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:9px}
 .wtm-cat-tile{min-height:98px;gap:10px;padding:11px 12px}
 .wtm-cat-glyph{height:31px;width:31px;border-radius:11px}.wtm-cat-glyph svg{height:18px;width:18px}
 .wtm-nav-footer span:last-child{display:none}
}
@media(max-width:360px){.wtm-nav-sheet{padding-left:15px;padding-right:15px}.wtm-nav-head h2{font-size:1.63rem}.wtm-nav-tail>span{display:none}.wtm-masthead-row{min-height:60px}.wtm-cat-copy strong{font-size:.75rem}}
@media(prefers-reduced-motion:reduce){.wtm-command-shelf *,.wtm-nav-panel,.wtm-nav-panel *{animation:none!important;transition:none!important;scroll-behavior:auto!important}}