:root{color-scheme:light;--ink:#102a2a;--muted:#536965;--paper:#f5f5ef;--line:#d8e0d7;--green:#c2ef8b;--white:#fff;--mono:ui-monospace,SFMono-Regular,Consolas,'Liberation Mono',monospace;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;color:var(--ink);background:var(--paper)}
*{box-sizing:border-box}body{margin:0}button,input,textarea{font:inherit}button,a,input,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a{color:inherit;text-underline-offset:3px}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid #28736a;outline-offset:4px}[hidden]{display:none!important}.site-header,main,footer{width:min(1100px,calc(100% - 80px));margin-inline:auto}.site-header{height:106px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{font-size:24px;letter-spacing:-1px;font-weight:750;text-decoration:none;display:flex;gap:10px;align-items:center}.brand-icon{font-family:var(--mono);font-size:19px;letter-spacing:-2px;background:var(--ink);color:var(--green);padding:5px 8px;border-radius:7px}.brand-dot{color:#557a3c;margin-left:-10px}.header-note{font-size:13px;color:var(--muted)}.intro{padding:64px 0 36px;max-width:740px}.eyebrow{font-family:var(--mono);font-size:11px;letter-spacing:1.6px;font-weight:600;margin:0 0 15px}.intro .eyebrow:before{content:'';display:inline-block;width:7px;height:7px;border-radius:50%;background:#608b45;margin-right:10px}h1{font-size:clamp(40px,6vw,68px);line-height:1.08;letter-spacing:-3px;margin:0 0 23px;font-weight:650}h1 span{color:#597b4a}.lede{font-size:18px;line-height:1.65;color:var(--muted);max-width:610px;margin:0}.calculator{background:var(--white);border:1px solid var(--line);border-radius:16px;box-shadow:0 8px 36px #102a2a05;overflow:hidden}.form-panel{padding:30px 32px;background:#fafbf7;border-bottom:1px solid var(--line)}.panel-title{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:26px}.panel-title h2{font-size:19px;letter-spacing:-.5px;margin:0}.badge{border:1px solid #d3dece;border-radius:5px;font-family:var(--mono);font-size:11px;padding:5px 8px;color:#45643c}label{display:block;font-size:13px;font-weight:600;margin-bottom:9px}.input-row{display:flex;gap:10px}input{min-width:0;flex:1;border:1px solid #a7b8ac;background:#fff;border-radius:7px;padding:15px 16px;font-family:var(--mono);font-size:17px;color:var(--ink)}input[aria-invalid=true]{border-color:#b53b31}.primary{background:var(--ink);color:var(--green);border:1px solid var(--ink);border-radius:7px;padding:14px 23px;font-weight:600;white-space:nowrap}.primary:hover{background:#204242}.primary span{margin-left:18px}.hint{font-size:12px;color:var(--muted);line-height:1.65;margin:10px 0 0}.examples{display:flex;align-items:center;flex-wrap:wrap;gap:8px;margin-top:19px;font-size:12px}.examples>span{color:var(--muted);margin-right:3px}.examples button{border:1px solid var(--line);background:transparent;color:var(--muted);border-radius:4px;font-size:11px;padding:5px 9px}.examples button:hover{background:#edf3e5;color:var(--ink)}.error{color:#9d2a23;font-size:13px;line-height:1.6;margin:12px 0 0}#results{padding:30px 32px 32px}.result-heading{display:flex;align-items:center;justify-content:space-between;gap:16px}.result-heading .eyebrow{color:var(--muted);margin-bottom:8px}.result-heading h2{font-family:var(--mono);font-size:clamp(17px,2.6vw,27px);letter-spacing:-1px;margin:0;overflow-wrap:anywhere}.secondary{background:#fff;border:1px solid var(--line);border-radius:5px;padding:9px 12px;font-size:12px;white-space:nowrap;color:var(--ink)}.secondary:hover{background:var(--paper)}.stats{display:grid;grid-template-columns:1.35fr 1fr 1fr;gap:0;margin:27px 0 31px;background:var(--paper);border:1px solid #e6e9e0;border-radius:9px}.stats>div{padding:20px;min-width:0}.stats>div+div{border-left:1px solid var(--line)}.stats span{display:block;font-size:12px;color:var(--muted);margin-bottom:11px}.stats strong{display:block;font-family:var(--mono);font-size:clamp(15px,2vw,22px);font-weight:500;overflow-wrap:anywhere;line-height:1.35}.stats small{display:block;color:var(--muted);font-size:11px;line-height:1.6;margin-top:8px}h3{font-size:13px;margin:0;font-weight:650}.details-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}.text-button{border:0;background:transparent;color:#41693c;font-size:12px;text-decoration:underline;text-underline-offset:3px;padding:5px 0 5px 8px}.details{display:grid;grid-template-columns:190px 1fr;margin:0;border-top:1px solid var(--line)}.details dt,.details dd{padding:13px 0;border-bottom:1px solid #e9ede6;font-size:13px;line-height:1.6;margin:0}.details dt{color:var(--muted)}.details dd{font-family:var(--mono);overflow-wrap:anywhere;min-width:0}.range-note{font-size:12px;line-height:1.7;color:var(--muted);margin:16px 0 25px;max-width:740px}.explore{display:grid;grid-template-columns:1fr 1fr;gap:30px;border-top:1px solid var(--line);padding-top:24px}.explore .hint{margin:4px 0 12px}.explore #parent,.explore #children{font-size:12px;color:var(--muted)}.subnet-button{display:block;text-align:left;margin:7px 0 0;border:1px solid var(--line);background:#fafbf7;color:var(--ink);font-family:var(--mono);font-size:12px;padding:10px 12px;border-radius:5px;max-width:100%;overflow-wrap:anywhere}.subnet-button:hover{background:#edf3e5;border-color:#97b786}.status{font-size:12px;color:#315c34;line-height:1.7;padding:0 32px;margin:0}.status:not(:empty){padding-block:0 20px}.copy-fallback{width:100%;min-height:100px;display:block;margin-top:10px;font-family:var(--mono);font-size:12px}.notes{display:grid;grid-template-columns:repeat(3,1fr);gap:36px;padding:46px 0;border-bottom:1px solid var(--line)}.note-number{font-family:var(--mono);font-size:10px;letter-spacing:1px;color:var(--muted)}.notes h2{font-size:16px;font-weight:600;margin:13px 0 10px;letter-spacing:-.2px}.notes p,.guide p{font-size:13px;line-height:1.85;color:var(--muted);margin:0}.guide{padding:38px 0 42px;max-width:900px}.guide h2{font-size:21px;font-weight:600;letter-spacing:-.5px;margin:0 0 15px}.guide-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px;margin:22px 0}.guide-grid strong{display:block;font-family:var(--mono);font-size:13px;color:var(--ink);margin-bottom:6px}.guide .hint{font-size:11px}footer{padding:25px 0 34px;border-top:1px solid var(--line);display:flex;gap:24px;align-items:center;justify-content:space-between;font-size:11px;color:var(--muted)}.footer-brand{font-weight:700;color:var(--ink);text-decoration:none;font-size:13px}.skip{position:fixed;left:10px;top:-100px;background:var(--white);padding:12px;z-index:10}.skip:focus{top:10px}
@media(min-width:1200px){.intro{padding-top:72px}.calculator{margin-top:5px}}
@media(max-width:760px){.site-header,main,footer{width:calc(100% - 36px)}.site-header{height:80px}.header-note{font-size:11px}.brand{font-size:21px}.intro{padding:40px 0 29px}h1{letter-spacing:-1.7px}.lede{font-size:16px}.form-panel,#results{padding:22px}.stats{grid-template-columns:1fr 1fr}.stats>div:first-child{grid-column:1/-1;border-bottom:1px solid var(--line)}.stats>div:nth-child(2){border-left:0}.stats>div{padding:16px}.stats strong{font-size:20px}.details{grid-template-columns:145px 1fr}.notes{gap:22px;grid-template-columns:1fr;padding:34px 0}.notes article{max-width:520px}.notes h2{margin:8px 0}.guide-grid{grid-template-columns:1fr;gap:20px}footer{flex-wrap:wrap;gap:13px}footer span:last-child{margin-left:auto}.status{padding-inline:22px}}
@media(max-width:460px){.header-note{display:none}.input-row{flex-direction:column}input{width:100%;font-size:16px;padding:14px 12px}.primary{padding:12px}.form-panel,#results{padding:19px}.result-heading{align-items:flex-start;gap:8px}.result-heading h2{font-size:17px}.secondary{font-size:11px;padding:8px}.details{grid-template-columns:1fr}.details dt{border-bottom:0;padding:13px 0 1px;font-size:11px}.details dd{padding:2px 0 12px}.explore{grid-template-columns:1fr;gap:22px}.stats strong{font-size:18px}.stats>div{padding:14px}.stats small{font-size:10px}.status{padding-inline:19px}footer span:last-child{margin-left:0;width:100%}}
@media(prefers-reduced-motion:no-preference){button,a{transition:background-color .15s,border-color .15s}}
select{font:inherit;color:var(--ink);background:var(--white);border:1px solid #a7b8ac;border-radius:5px;padding:10px 32px 10px 12px;min-width:110px}select:focus-visible,summary:focus-visible{outline:3px solid #28736a;outline-offset:4px}button:disabled{cursor:default;opacity:.45}.planner{border-top:1px solid var(--line);margin-top:26px;padding-top:22px}.planner summary{font-size:13px;font-weight:650;cursor:pointer;padding:6px 0}.planner-content{padding-top:8px}.planner-controls{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin:18px 0 12px}.planner-controls label{font-size:12px}.plan-window{font-size:12px;line-height:1.7;overflow-wrap:anywhere;font-family:var(--mono);margin:18px 0 10px}.plan-entries{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:1fr 1fr;gap:7px 12px}.plan-entries li{min-width:0}.plan-entries .subnet-button{width:100%;margin:0}.plan-pagination{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}.planner .hint{overflow-wrap:anywhere}@media(max-width:760px){.plan-entries{grid-template-columns:1fr}}@media print{.planner{display:none}}
@media print{.site-header,.intro,form,.examples,.secondary,.text-button,.explore,.notes,.guide,footer,.status{display:none}.site-header,main,footer{width:100%}.calculator{border:0;box-shadow:none}.form-panel{padding:0;background:white;border:0}.panel-title{margin:0}.details dd{overflow-wrap:anywhere}.stats{break-inside:avoid}}