/* Matches the Mini Civils supporting-page and survey-instrument styles. */
:root{--bg:#0b0c0b;--surface:#0e110d;--raised:#181d14;--border:#414437;--text:#f4f3ee;--muted:#aeb5a3;--accent:#fe9527;--sage:#b8bfae;--display:'Bahnschrift Condensed','Arial Narrow',Impact,sans-serif;--mono:'Cascadia Mono',Consolas,monospace}
body{background:var(--bg);color:var(--text);font-family:Inter,'Segoe UI',Arial,sans-serif;isolation:isolate;min-height:100svh;padding-bottom:0}
.page-contours{position:fixed;z-index:-1;inset:0 auto 0 0;width:min(48vw,75vh);pointer-events:none;opacity:.58;background:url('site-background.jpg') left top / auto 100vh no-repeat;mask-image:linear-gradient(90deg,#000,transparent)}
.skip-link{position:fixed;left:1rem;top:1rem;z-index:100;transform:translateY(-180%);padding:.8rem 1rem;color:#111;background:var(--accent);font-weight:800}.skip-link:focus{transform:none}
.site-header{height:auto;min-height:5.25rem;padding:1.1rem clamp(1.5rem,4vw,4.5rem);background:linear-gradient(180deg,#040606aa,#0406062e);border-bottom:1px solid #ffffff24;gap:2rem}
.brand{font:800 .83rem/1.2 Inter,'Segoe UI',Arial,sans-serif;letter-spacing:.18em;text-decoration:none;color:var(--text)}.brand small{font:700 .55rem/1 var(--mono);letter-spacing:.22em;margin-top:.42rem}.brand span{color:#f47721}
.site-nav{display:flex;gap:clamp(1rem,3vw,3rem);align-items:center}.site-nav a{display:grid;place-items:center;color:#b8bbb6;width:40px;height:40px;position:relative}.site-nav a:hover,.site-nav a[aria-current]{color:var(--accent)}.site-nav a[aria-current]:after{content:'';position:absolute;height:2px;background:var(--accent);left:8px;right:8px;bottom:-17px}.site-nav svg{width:21px;height:21px;fill:none;stroke:currentColor;stroke-width:1.25;stroke-linecap:round;stroke-linejoin:round}
.shell{display:block;width:min(1140px,calc(100% - 8vw));max-width:none;padding:2rem 0 5rem;margin:0 auto}.back-link{display:inline-flex;padding:.8rem 0;color:var(--accent);text-decoration:none;font:700 .68rem/1.6 var(--mono);letter-spacing:.07em}.workspace{margin-top:0}.page-heading{display:block;margin-bottom:2.4rem}.page-heading .eyebrow{font:700 .65rem/1.5 var(--mono);letter-spacing:.13em;color:var(--accent)}.page-heading h1{font:900 clamp(2.6rem,4.4vw,4.2rem)/.98 var(--display);letter-spacing:-.025em;margin:1rem 0 1.4rem;text-transform:uppercase}.page-heading p{font-size:1rem;line-height:1.7;max-width:48rem;color:#b8bbb6}.live-label{display:none}
.tool-nav{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;border:1px solid var(--border);border-bottom:0;background:#0e110d;margin:0}.tool-button{display:flex;align-items:center;gap:12px;padding:1rem .95rem;min-height:57px;border:0;border-right:1px solid var(--border);border-radius:0;background:transparent;font:700 .7rem/1.4 var(--mono);text-transform:uppercase;letter-spacing:.03em;box-shadow:none;color:#c7cbc2}.tool-button:last-child{border-right:0}.tool-button span{font-size:.6rem;color:#9da48f}.tool-button[aria-pressed=true]{background:var(--accent);color:#10130d;border:0;border-right:1px solid var(--border)}.tool-button[aria-pressed=true] span{color:#373321}.tool-button:hover{background:#25291e}.tool-button[aria-pressed=true]:hover{background:#ffad53}
.calculator{display:grid;grid-template-columns:1fr 1.05fr;gap:0;align-items:stretch;border:1px solid var(--border);border-top:3px solid var(--accent);background:#0e110d}.card{padding:clamp(1.3rem,3vw,2.7rem);border:0;border-radius:0;background:transparent;min-width:0}.calculator>form{border-right:1px solid var(--border)}.result-card{background:linear-gradient(135deg,#fe952717,transparent 70%)}.card-title{font:800 1.25rem/1.1 var(--display);text-transform:uppercase;margin:0 0 1rem}.step{font:700 .64rem var(--mono);vertical-align:middle}.hint{font-size:.8rem;color:#aeb5a3;line-height:1.65}.fields{gap:22px 18px;margin:1.5rem 0}.field-head{font:700 .66rem/1.5 var(--mono);letter-spacing:.08em;text-transform:uppercase;color:#b8bfae}.unit{font-size:.66rem;letter-spacing:0}.field input,.field select{border-radius:0;background:#181d14;border:1px solid #59624b;padding:.75rem;min-height:3.25rem;color:var(--text);font:500 1.3rem/1.2 var(--mono)}.field select{font:.85rem/1.4 Inter,'Segoe UI',sans-serif}.field input:read-only{background:#1b2117;color:#b8bfae;border-color:#59624b}.field .help{font:.73rem/1.6 Inter,'Segoe UI',sans-serif;margin-top:.6rem;color:#aeb5a3}
.segmented{margin:1.4rem 0;padding:0;border:1px solid var(--border);border-radius:0;background:transparent;gap:0}.segmented button{border-radius:0;padding:1rem .7rem;font:700 .7rem/1.35 var(--mono);border-right:1px solid var(--border);text-transform:uppercase}.segmented button:last-child{border-right:0}.segmented button[aria-pressed=true]{color:#10130d;background:var(--accent);box-shadow:none}.button{border-radius:0;min-height:2.75rem;padding:.7rem .8rem;font:700 .68rem/1.3 var(--mono);border-color:#606752}.button:hover{color:var(--accent);border-color:var(--accent);background:transparent}.button.primary{background:var(--accent);color:#11170c}.actions{gap:.6rem}.status-line{font:.68rem/1.5 var(--mono)}.error{font-size:.85rem;color:#ffb773}
.result-kicker{color:#b8bfae;font:700 .68rem/1.5 var(--mono);letter-spacing:.13em}.big-number{font:500 clamp(1.8rem,3.4vw,3.2rem)/1.2 var(--mono);letter-spacing:-.04em;margin:1.2rem 0 .8rem;color:var(--accent)}.big-number span{font:400 1.05rem/1.4 var(--mono);letter-spacing:0}.result-description{font:.82rem/1.65 var(--mono);color:#c3c8bd}.result-pair{gap:1.2rem}.result-pair small{font:700 .67rem/1.5 var(--mono);letter-spacing:.08em;text-transform:uppercase;color:#b8bfae}.result-pair .big-number{font-size:clamp(1.7rem,2.6vw,2.5rem);letter-spacing:-.055em}.result-pair .big-number span{font-size:.9rem}.metrics{border-color:var(--border);gap:1rem}.metric small{font:700 .6rem/1.5 var(--mono);letter-spacing:.04em;text-transform:uppercase}.metric strong{font:.92rem/1.5 var(--mono)}
.diagram,.measurement-guide{border-radius:0;background-color:#10140e;border-color:#34382e}.diagram svg text{fill:#c3c8bd}.legend{font:.6rem/1.5 var(--mono)}.callout{border-radius:0;background:#fe952709;border-color:var(--accent);color:#b8bbb6;font-size:.8rem}.out-square{border-radius:0;border-color:#8f622d;background:#fe95270d}.out-square .big-number{font:500 clamp(2.2rem,4vw,3.6rem)/1.15 var(--mono);letter-spacing:-.04em}.ant-card{border-radius:0;border:1px solid var(--border);border-top:2px solid var(--accent);background:#11140f;padding:1.3rem}.ant-card strong{font:800 1.7rem/1.05 var(--display);text-transform:uppercase}.empty{border-radius:0}.section-divider{border-color:#34382e}.progress i{border-radius:0}.mini-table{font-size:.75rem}
.context{margin-top:3rem;gap:2.5rem}.context details{border:0;border-top:1px solid var(--border);border-radius:0;padding:1.2rem 0}.context summary{font:800 1.6rem/1.1 var(--display);text-transform:uppercase;color:var(--text)}details{border-color:#34382e}summary{font:700 .7rem/1.6 var(--mono);letter-spacing:.04em;color:#b8bfae}details p{color:#b8bbb6;font-size:.82rem;line-height:1.75}.service{border-top:1px solid var(--border);padding-top:2rem;margin-top:2rem;gap:2rem}.service strong{font:800 1.8rem/1.08 var(--display);text-transform:uppercase;display:block;max-width:28ch}.service p{font-size:.85rem;line-height:1.7;max-width:38rem;margin-top:1rem}.service a{display:inline-flex;align-items:center;justify-content:space-between;min-height:3.25rem;padding:1rem 1.2rem;background:var(--accent);color:#11170c;font:800 .7rem/1.5 var(--mono);text-transform:uppercase;letter-spacing:.08em}.service a:hover{background:#ffad53}
footer{display:flex;justify-content:space-between;gap:1.5rem;padding:2rem 4%;border-color:#ffffff14;font:700 .55rem/1.6 var(--mono);letter-spacing:.1em}.mobile-dock{display:none!important}
@media(max-width:760px){.site-header{padding:1rem;gap:1rem;flex-wrap:wrap}.brand{font-size:.72rem}.site-nav{gap:.25rem}.site-nav a{width:30px;height:36px}.site-nav svg{width:18px;height:18px}.site-nav a[aria-current]:after{bottom:-10px}.shell{width:calc(100% - 2rem);padding-top:1.3rem}.page-heading h1{font-size:clamp(2.6rem,9vw,3.5rem)}.page-heading p{font-size:.9rem}.tool-nav{grid-template-columns:1fr 1fr}.tool-button{font-size:.65rem;padding:.8rem .6rem;gap:7px;border-bottom:1px solid var(--border)}.tool-button:nth-child(2){border-right:0}.tool-button[aria-pressed=true]{border-bottom:1px solid var(--border)}.calculator{grid-template-columns:1fr;gap:0}.calculator>form{border-right:0;border-bottom:1px solid var(--border)}.card{padding:1.5rem}.context{grid-template-columns:1fr;gap:1rem;margin-top:2rem}.fields{gap:18px 12px}.field input{font-size:1.1rem}.result-pair .big-number{font-size:1.9rem}.service{flex-direction:column;align-items:stretch}.service a{justify-content:center}.service strong{font-size:1.65rem}.actions .button{flex-grow:1}footer{flex-direction:column;padding:1.5rem 1rem}.page-contours{opacity:.3}}
@media(max-width:420px){.site-header{justify-content:center}.site-nav{justify-content:space-between;width:100%}.site-nav a[aria-current]:after{bottom:-7px}.tool-button{font-size:.6rem}.card{padding:1.2rem}.metric strong{font-size:.8rem}.big-number{font-size:2.25rem}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
@media print{.site-header,.tool-nav,.back-link,.page-contours,.skip-link,footer{display:none!important}.shell{width:100%;padding:0}.calculator{display:block;border-color:#666}.calculator>form{border-right:0}.card,.result-card{background:white;color:black}.page-heading h1{font-size:2.4rem;color:black}.big-number{color:#a44b00}.result-kicker,.result-description,.field-head,.hint,.field .help,.metric small{color:#333}.field input,.field select{background:white;color:black}.context{margin-top:1rem}.context summary{color:black}}

.related-tools{margin-top:3rem;border-top:1px solid var(--border);padding-top:2rem}.related-tools h2{font:800 1.8rem/1 var(--display)}.related-tools nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem}.related-tools a{border:1px solid var(--border);border-top:2px solid var(--accent);padding:1.3rem;background:#0e110d;text-decoration:none;color:var(--text);font:700 .8rem/1.5 var(--mono);display:flex;justify-content:space-between;gap:1rem}.related-tools a:hover{color:var(--accent);background:#1c2119}@media(max-width:760px){.related-tools nav{grid-template-columns:1fr}}@media print{.related-tools{display:none}}