/* Brainrotter property design system. Local system typography, no imports. */
:root{--font-display:system-ui,-apple-system,"Segoe UI",sans-serif;--font-heading:var(--font-display);--font-body:var(--font-display);--font-numeric:var(--font-display);--heading-1:3.5rem;--heading-2:2rem;--heading-3:1.35rem;--heading-4:1.15rem;--heading-5:1rem;--heading-6:.9rem;--body-size:1rem;--small-size:.78rem;--label-size:.8rem;--neutral:#dce1da;--surface-elevated:#fff;--surface-interactive:#e7ede2;--content-narrow:740px;--entrance-duration:280ms;--exit-duration:160ms;--layout-duration:280ms}
:root{--page:#f4f5f1;--card:#fff;--muted-surface:#e9ede5;--primary:#245c46;--secondary:#dce6dc;--text:#1c2c25;--muted:#67736b;--border:#dce1da;--success:#245c46;--warning:#8b621d;--error:#a23333;--info:#365c79;--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:24px;--space-6:32px;--space-7:48px;--space-8:64px;--radius:18px;--shadow:0 12px 35px #20362808;--width:1160px;--fast:160ms;--normal:280ms;--slow:420ms;--ease:cubic-bezier(.2,.8,.2,1);--display:clamp(2.6rem,5vw,4rem)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--page);color:var(--text);font-family:system-ui,-apple-system,"Segoe UI",sans-serif;font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button,a,input,select,summary{touch-action:manipulation}button{cursor:pointer}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid var(--primary);outline-offset:4px}h1,h2,h3,p{margin-top:0}h1,h2,h3{line-height:1.14;letter-spacing:-.04em;font-weight:650}h1{font-size:var(--display);margin-bottom:24px}h2{font-size:clamp(1.5rem,2.2vw,2rem)}h3{font-size:1.35rem}p{color:var(--muted)}.small{font-size:.78rem;color:var(--muted);line-height:1.6}.eyebrow{display:block;font-size:.7rem;letter-spacing:.13em;text-transform:uppercase;font-weight:650;color:var(--primary);margin-bottom:16px}.lead{font-size:1.1rem;max-width:540px;line-height:1.8}.container{max-width:var(--width);margin:auto;padding:0 24px}.preview-strip{height:34px;display:flex;justify-content:center;align-items:center;gap:8px;font-size:.68rem;background:#e4e9df;color:#425449;letter-spacing:.02em}.preview-strip>span:last-child{margin-left:20px;color:#536558}.dot{display:inline-block;width:6px;height:6px;background:var(--primary);border-radius:50%;flex:none}.navigation{max-width:var(--width);margin:auto;padding:27px 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.arc{stroke:var(--primary);stroke-width:3}.hero-panel svg .point,.card-art svg .point{fill:var(--primary);stroke:#e7ede2;stroke-width:3}.hero-panel svg text,.card-art svg text{fill:#245c46;stroke:none;font-size:12px;font-weight:600}.panel-bottom{border-top:1px solid #d6e0d0;display:flex;justify-content:space-between;padding:23px 26px;align-items:center;background:#edf1e8}.panel-bottom strong{font-size:2.1rem;display:block;letter-spacing:-.05em;font-variant-numeric:tabular-nums;font-weight:600}.panel-bottom strong small{font-size:1rem;font-weight:450;letter-spacing:0}.panel-bottom>a{display:grid;place-items:center;border:1px solid #ced9c8;border-radius:50%;width:43px;height:43px;font-size:1.2rem}.section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:27px}.section-head h2{margin:0}.section-head .eyebrow{margin-bottom:10px}.text-link{font-size:.8rem;font-weight:600;color:var(--primary);white-space:nowrap}.bento{display:grid;grid-template-columns:1.1fr 1fr;grid-template-rows:auto auto;gap:20px}.tool-card{display:block;border:1px solid var(--border);border-radius:var(--radius);background:var(--card);overflow:hidden;transition:transform var(--normal) var(--ease),box-shadow var(--normal)}.bento>.tool-card{grid-row:span 2}.tool-card:hover,.note-card:hover,.trust-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}.card-art{background:#ecf0e8;min-height:150px;display:grid;place-items:center}.card-art svg{width:100%;height:220px;stroke:#a3b6a0;fill:none;stroke-width:1}.card-body{padding:26px}.card-body h3{display:flex;justify-content:space-between;gap:12px}.card-body p{font-size:.88rem;margin:0;max-width:380px}.note-card,.trust-card{border:1px solid var(--border);border-radius:var(--radius);padding:28px;transition:transform var(--normal) var(--ease),box-shadow 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12px;background:#fafbf8;color:var(--text)}input[aria-invalid=true]{border-color:var(--error)}.field-error{display:block;font-size:.74rem;color:var(--error);margin-top:5px;min-height:0}.input-panel>.button{width:100%;margin:20px 0 14px}.input-panel>.small{margin:0;font-size:.71rem}.result-panel{background:#e7ede2;display:flex;flex-direction:column;justify-content:center}.empty-result{text-align:center;padding:45px 10px}.empty-result h2{font-size:1.5rem;letter-spacing:-.025em}.empty-result p{font-size:.9rem;max-width:260px;margin:auto}.result-symbol{font-size:4rem;font-weight:200;display:block;color:#69836b;margin-bottom:25px}.result-number{font-size:clamp(2.3rem,4vw,3.5rem);font-variant-numeric:tabular-nums;letter-spacing:-.06em;margin:8px 0 20px;overflow-wrap:anywhere}.result-number small{font-size:1.15rem;font-weight:450;letter-spacing:0}.result-panel>p{font-size:.85rem;max-width:330px}.result-detail{border-top:1px solid #d2ddcc;margin:16px 0 25px;padding-top:15px}.result-detail>div{display:flex;justify-content:space-between;gap:16px;font-size:.76rem;margin:10px 0}.result-detail span{color:var(--muted)}.result-detail strong{font-weight:550}.result-panel [role=status]{font-size:.75rem;margin-top:8px}.example-row{display:flex;gap:16px;flex-wrap:wrap;margin:22px 0 36px;align-items:center}.example-row a{font-size:.72rem;border:1px solid var(--border);border-radius:25px;padding:7px 12px;background:#fff}.callout{border:1px solid var(--border);border-left:3px solid var(--primary);border-radius:10px;padding:23px 26px;background:#eaf0e6;margin:25px 0 40px}.callout p{font-size:.87rem;margin:10px 0}.callout a:not(.button){font-size:.8rem;color:var(--primary);font-weight:600}.calculator~.tool-card{max-width:540px;margin-bottom:55px}.calculator~.tool-card .card-art{display:none}.article-meta{font-size:.75rem;color:var(--muted);padding-top:5px}.article-layout{display:grid;grid-template-columns:230px minmax(0,740px);gap:56px;justify-content:center;padding-bottom:60px}.article-layout aside{position:sticky;top:25px;height:max-content;border-left:1px solid var(--border);padding-left:20px}.article-layout aside a{display:block;font-size:.78rem;padding:8px 0;color:var(--muted)}.prose{font-size:1rem;line-height:1.9}.prose h2{font-size:1.55rem;margin:42px 0 18px;letter-spacing:-.03em}.prose section:first-child h2{margin-top:0}.prose p{color:#526158}.prose>.button{margin:20px 0 50px}.source-url{font-family:ui-monospace,monospace;font-size:.78rem;overflow-wrap:anywhere}.formula{font-size:.8rem;overflow:auto;line-height:1.9;background:#e5ece1;padding:22px;border-radius:12px;color:var(--primary)}details{border-top:1px solid var(--border);border-bottom:1px solid var(--border);padding:18px 0}summary{cursor:pointer;font-weight:600;min-height:32px}details p{margin:15px 0 0}.filter-bar{display:flex;gap:6px;margin-bottom:25px}.segment{border:1px solid transparent;border-radius:8px;background:transparent;color:var(--muted);padding:10px 17px;min-height:44px;font-size:.8rem}.segment.active{background:#fff;border-color:var(--border);color:var(--primary)}.tool-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-bottom:70px}.tool-grid>[hidden]{display:none}.skip-link{position:fixed;top:-100px;left:16px;z-index:100;background:#fff;padding:12px 20px;border:2px solid var(--primary)}.skip-link:focus{top:12px}.error-panel{padding:40px;background:#fff;border:1px solid var(--border);border-radius:var(--radius);margin:45px 0}.metrics-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin:30px 0}.metrics-grid article{padding:28px;background:#fff;border:1px solid var(--border);border-radius:var(--radius)}.metrics-grid strong{font-size:2rem;font-variant-numeric:tabular-nums}
@media(max-width:900px){.hero{gap:30px;padding:55px 0}.hero h1{font-size:3.1rem}.navigation nav{gap:18px}.nav-cta{display:none}.newsletter{gap:32px;padding:30px}.article-layout{grid-template-columns:160px minmax(0,1fr);gap:30px}.calculator{gap:18px}.input-panel,.result-panel{padding:24px}.principles{gap:25px}.panel-top{padding:20px}.panel-bottom{padding:20px}.preview-strip>span:last-child{margin-left:8px}}
@media(max-width:640px){.container{padding:0 20px}.preview-strip{font-size:.61rem}.preview-strip>span:last-child{display:none}.navigation{padding:20px;gap:15px;flex-wrap:wrap}.brand{font-size:1rem}.navigation nav{margin:0;width:100%;justify-content:space-between;gap:12px;font-size:.8rem}.hero{grid-template-columns:1fr;gap:35px;padding:43px 0 50px}.hero h1{font-size:clamp(2rem,10.8vw,2.8rem)}.hero .lead{font-size:1rem}.hero-panel{border-radius:18px}.hero-panel svg{max-height:225px}.panel-bottom strong{font-size:1.85rem}.hero-note{font-size:.7rem}.section-head{align-items:start;flex-direction:column;gap:14px}.section-head h2{font-size:1.5rem}.bento{grid-template-columns:1fr;gap:16px}.bento>.tool-card{grid-row:auto}.card-art svg{height:190px}.card-body,.note-card,.trust-card{padding:24px}.note-card .note-mark{display:none}.note-card .eyebrow{padding-right:0}.principles{grid-template-columns:1fr;gap:26px;padding:38px 0}.principles>div{display:grid;grid-template-columns:32px 1fr;gap:0 12px}.principles .index{grid-row:1/3;margin:1px 0}.principles h3{margin:0 0 8px}.principles p{grid-column:2}.newsletter{grid-template-columns:1fr;gap:22px;padding:25px;margin:38px 0}.newsletter h2{font-size:1.7rem}.footer{padding:28px 20px;grid-template-columns:1fr;gap:8px}.footer nav{grid-column:1;grid-row:auto}.page-heading{padding:40px 0 25px}.page-heading h1{font-size:2.5rem}.page-heading .lead{font-size:1rem}.calculator{grid-template-columns:1fr;gap:20px}.input-panel,.result-panel{padding:24px}.input-panel .section-head{flex-direction:row;gap:8px}.coordinate-grid{gap:14px}.input-panel h2{font-size:1.15rem}.empty-result{padding:28px 10px}.result-number{font-size:3rem}.example-row{gap:8px;margin:20px 0 30px}.example-row>.small{width:100%}.article-layout{display:block;padding-bottom:30px}.article-layout aside{position:static;margin-bottom:30px;display:flex;gap:10px;overflow:auto;padding:0;border:0}.article-layout aside .eyebrow{display:none}.article-layout aside a{white-space:nowrap;padding:8px 12px;border:1px solid var(--border);border-radius:20px;font-size:.7rem}.prose{font-size:.95rem;line-height:1.85}.prose h2{font-size:1.4rem}.tool-grid,.metrics-grid{grid-template-columns:1fr}.filter-bar{gap:2px}.segment{padding:10px 13px}.callout{padding:20px}.formula{font-size:.7rem;padding:16px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}}
nav a{min-height:44px;display:inline-flex;align-items:center}.example-row a,.article-layout aside a{min-height:44px;display:inline-flex;align-items:center}.check{min-height:44px}.panel-bottom>a{width:44px;height:44px}
/* Registered utility and learning compositions; the reference calculator remains intact. */
.registry-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin:24px 0 64px}.registry-card{min-width:0}.registry-card[hidden]{display:none}.registry-card .tool-card{height:100%;display:flex;flex-direction:column}.registry-card .card-art{height:180px;min-height:0;display:flex;align-items:center;justify-content:center}.registry-card .card-body{flex:1}.tool-example{display:block;font-size:.78rem;margin-top:20px;color:var(--primary)}.registry-card .card-art .geo-diagram{height:160px}
.geo-diagram{display:block;width:100%;max-width:320px;height:190px;fill:none;stroke:#a2b69f;stroke-width:1.2;margin:auto}.geo-diagram text{fill:var(--primary);stroke:none;text-anchor:middle;font-size:12px;font-family:var(--font-body);font-weight:650;letter-spacing:.03em}.geo-diagram .diagram-surface{fill:#edf1e8;stroke:#c2cfbc}.geo-diagram .diagram-accent{stroke:var(--primary);stroke-width:3;fill:none}.geo-diagram .diagram-point{fill:var(--primary);stroke:var(--page);stroke-width:2}.geo-diagram .diagram-box{fill:#245c4608;stroke:var(--primary);stroke-width:2;stroke-dasharray:5 4}.registered-tool fieldset{margin:0 0 24px;padding:0;border:0}.registered-tool legend{font-size:.85rem;font-weight:650;margin-bottom:14px}.registered-tool input{min-width:0;width:100%;font-size:.95rem}.registered-tool .tool-control{margin-bottom:20px}.tool-control .small{display:block;margin-top:7px;font-size:.72rem}.tool-control label{display:block;font-size:.82rem;font-weight:650;margin-bottom:8px}.registered-tool .button[type=submit]{width:100%;margin-top:12px}.registered-tool .reset-link{display:block;text-align:center;padding:12px;font-size:.85rem;color:var(--muted)}.tool-result{min-width:0;align-self:start}.tool-result .empty-result{padding:12px 0 0}.tool-result .geo-diagram{margin:0 auto 24px}.coordinate-result{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:12px 0 24px}.coordinate-result span{display:block;font-size:.75rem;color:var(--muted)}.coordinate-result strong{font-size:clamp(1.1rem,2.1vw,1.6rem);font-variant-numeric:tabular-nums;letter-spacing:-.04em}.format-stack>div{position:relative;padding:14px 48px 14px 0;border-top:1px solid var(--border)}.format-stack code{display:block;white-space:normal;overflow-wrap:anywhere;font-family:var(--font-numeric);font-size:.86rem}.format-stack .quiet-button{position:absolute;right:0;top:18px;min-height:44px;padding:4px}.result-stats{margin:8px 0 24px;display:grid;grid-template-columns:1fr 1fr;gap:12px}.result-stats>div{border-top:1px solid var(--border);padding-top:15px}.result-stats dt{font-size:.75rem;color:var(--muted)}.result-stats dd{margin:4px 0;font-size:1.5rem;letter-spacing:-.04em;font-weight:650;overflow-wrap:anywhere}.precision-note{font-size:.75rem;border-left:2px solid #b4c4ab;padding-left:12px}.next-tools{margin:36px 0 48px}.next-tools>div{display:flex;gap:12px;flex-wrap:wrap}.next-tools .button{font-size:.85rem}.method-panel{background:var(--muted-surface);padding:32px;border-radius:var(--radius);margin:32px 0 56px}.method-panel>p{max-width:80ch}.method-panel details{border-top:1px solid #cfd8c9;padding:15px 0}.method-panel summary{cursor:pointer;min-height:44px;align-content:center;font-weight:600}.learning-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-bottom:48px}.learning-card{display:block;background:#eeeae1;border:1px solid #deddd3;border-radius:var(--radius);padding:32px;transition:transform var(--normal) var(--ease),border-color var(--normal)}.learning-card:hover{transform:translateY(-3px);border-color:#b2beaa}.learning-card h3{max-width:24ch}.learning-card p{max-width:50ch}.learning-section{margin:64px 0}.trust-panel{display:grid;grid-template-columns:1.4fr 1fr;align-items:center;gap:48px;margin:48px 0 64px;padding:40px;background:var(--muted-surface);border-radius:var(--radius)}.glossary-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.glossary-grid section{border-top:1px solid var(--border);padding:24px 0}.glossary-grid h2{font-size:1.4rem}.breadcrumb:hover{text-decoration:underline}.filter-bar{flex-wrap:wrap}.registered-tool input::placeholder{font-size:.72rem}.distance-summary{font-size:.9rem}.tool-bearing .result-stats dd{font-size:2.1rem}.tool-coordinate-converter .coordinate-result{display:none}
@media(max-width:1000px){.registry-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.featured-tools .registry-card:last-child{grid-column:1/-1}.featured-tools .registry-card:last-child .tool-card{display:grid;grid-template-columns:1fr 1fr}.registered-tool .coordinate-grid{grid-template-columns:1fr}.coordinate-result{gap:8px}.trust-panel{gap:24px}}
@media(max-width:600px){.registry-grid,.learning-grid,.glossary-grid{grid-template-columns:1fr}.featured-tools .registry-card:last-child .tool-card{display:flex}.registry-grid{gap:18px;margin-bottom:40px}.registry-card .card-art{height:160px}.registry-card .card-art .geo-diagram{height:150px}.registered-tool .coordinate-grid{grid-template-columns:1fr}.tool-result .geo-diagram{max-width:270px}.tool-result{padding:24px}.result-stats dd{font-size:1.25rem}.tool-bearing .result-stats dd{font-size:1.6rem}.coordinate-result{grid-template-columns:1fr}.coordinate-result strong{font-size:1.5rem}.format-stack code{font-size:.82rem}.method-panel,.learning-card{padding:24px}.trust-panel{grid-template-columns:1fr;padding:28px}.trust-panel .geo-diagram{height:160px}.next-tools>div{display:grid;grid-template-columns:1fr}.next-tools .button{white-space:normal}.filter-bar .segment{min-height:44px}.learning-section{margin:44px 0}.tool-control label{font-size:.85rem}}
@media(prefers-reduced-motion:reduce){.learning-card,.registry-card .tool-card{transition:none}.learning-card:hover{transform:none}}

:root{--primary:#245c46;--page:#f4f5f1;}