:root{--bg: #f5f7fa;--surface: #ffffff;--raised: #eceff4;--border: #d9e0e8;--text: #151a21;--muted: #535e6e;--accent: #1c4f8f;--accent-soft: #e3ecf8;--ok: #0f5c3f;--ok-soft: #e2f1ea;--bad: #a3231f;--bad-soft: #fae9e8;--warn-bg: #fdf3e3;--warn-border: #e6c98a;--radius: 6px;--maxw: 68rem;--font: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;--shadow: 0 1px 2px rgba(21, 26, 33, .06), 0 2px 10px rgba(21, 26, 33, .04)}@media(prefers-color-scheme:dark){:root:not([data-theme=light]){--bg: #12161c;--surface: #1a1f27;--raised: #232932;--border: #313945;--text: #e8edf4;--muted: #9aa6b6;--accent: #7cb0f5;--accent-soft: #1d2b40;--ok: #56c38c;--ok-soft: #16281f;--bad: #f2837d;--bad-soft: #2c1a19;--warn-bg: #2d2413;--warn-border: #5c4a21;--shadow: 0 1px 2px rgba(0, 0, 0, .35), 0 2px 10px rgba(0, 0, 0, .3)}}:root[data-theme=dark]{--bg: #12161c;--surface: #1a1f27;--raised: #232932;--border: #313945;--text: #e8edf4;--muted: #9aa6b6;--accent: #7cb0f5;--accent-soft: #1d2b40;--ok: #56c38c;--ok-soft: #16281f;--bad: #f2837d;--bad-soft: #2c1a19;--warn-bg: #2d2413;--warn-border: #5c4a21}*{box-sizing:border-box}[hidden]{display:none!important}html{scroll-behavior:smooth}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important}}body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font);font-size:17px;line-height:1.65;-webkit-text-size-adjust:100%;-webkit-font-smoothing:antialiased}.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 16px}.narrow{max-width:44rem}a{color:var(--accent);text-underline-offset:2px}a:hover{text-decoration-thickness:2px}:focus-visible{outline:3px solid var(--accent);outline-offset:2px;border-radius:4px}h1{font-size:clamp(1.7rem,4.6vw,2.4rem);line-height:1.15;letter-spacing:-.02em;margin:0 0 .35em}h2{font-size:clamp(1.3rem,3vw,1.6rem);line-height:1.25;letter-spacing:-.01em;margin:2.2em 0 .5em}h3{font-size:1.08rem;margin:1.6em 0 .4em}p{margin:0 0 1em}.site-header{border-bottom:1px solid var(--border);background:var(--surface);padding-top:max(14px,env(safe-area-inset-top))}.site-header .wrap{display:flex;flex-wrap:wrap;gap:6px 22px;align-items:center;padding-block:11px 13px}.brand{display:inline-flex;align-items:center;gap:9px;font-weight:700;text-decoration:none;color:var(--text);font-size:1.02rem;letter-spacing:-.01em;min-height:44px}.brand svg{width:26px;height:26px;border-radius:6px;flex:none}.site-nav{display:flex;flex-wrap:wrap;gap:2px 14px;font-size:.93rem;margin-left:auto}.site-nav a{text-decoration:none;color:var(--muted);display:inline-flex;align-items:center;justify-content:center;min-height:44px;min-width:44px;padding-inline:4px}.site-nav a:hover{color:var(--accent);text-decoration:underline}.site-nav a[aria-current=page]{color:var(--text);font-weight:600}main{padding-block:30px 56px}.lede{font-size:1.1rem;color:var(--muted);margin:0 0 1.6em;max-width:46rem}.site-footer{border-top:1px solid var(--border);padding-block:26px 44px;font-size:.88rem;color:var(--muted)}.site-footer a{color:var(--muted)}.site-footer nav{display:flex;flex-wrap:wrap;gap:2px 18px;margin-bottom:10px}.site-footer nav a{display:inline-flex;align-items:center;justify-content:center;min-height:44px;min-width:44px}.site-footer p{max-width:42rem}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px}.tool-grid{display:grid;gap:14px;padding:0;margin:1.6em 0;list-style:none;grid-template-columns:repeat(auto-fit,minmax(13rem,1fr))}.tool-grid li{display:flex;flex-direction:column;gap:4px}.tool-grid a,.tool-grid strong{font-weight:650;text-decoration:none;font-size:1.02rem}.tool-grid a:hover{text-decoration:underline}.tool-grid li:has(a){position:relative;transition:border-color .12s ease}.tool-grid li:has(a):hover{border-color:var(--accent)}.tool-grid a:after{content:"";position:absolute;inset:0;border-radius:var(--radius)}.tool-grid p{margin:0;color:var(--muted);font-size:.93rem;line-height:1.5}.calc{display:flex;flex-direction:column;gap:20px;grid-template-columns:minmax(0,1fr);margin:1.2em 0 0}.calc>.presets{order:-2}.calc>div:last-child{order:-1}@media(min-width:56rem){.calc{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:start}.calc>.presets{grid-column:1 / -1;order:0;margin-bottom:0}.calc>div:last-child{position:sticky;top:16px;order:0}}.field-grid{display:grid;gap:14px}@media(min-width:30rem){.field-grid.two{grid-template-columns:1fr 1fr}}.field{display:flex;flex-direction:column;gap:4px;min-width:0}.field>label{font-weight:600;font-size:.94rem}.field .note{font-size:.84rem;color:var(--muted);line-height:1.45;margin:0}.field .control{display:flex;gap:6px}.field input[type=text],.field input[type=number],.field select{font:inherit;font-size:1rem;color:var(--text);background:var(--surface);border:1.5px solid var(--border);border-radius:9px;padding:9px 11px;min-width:0;width:100%}.field .control input{flex:1 1 auto}.field .control select{flex:0 0 auto;width:auto;background:var(--raised)}.field input:hover,.field select:hover{border-color:var(--muted)}.field[data-invalid=true] input{border-color:var(--accent);background:var(--accent-soft)}.field input[type=range]{width:100%;accent-color:var(--accent);border:0;background:none;min-height:44px;padding-block:14px;font-size:16px}.range-row{display:flex;align-items:baseline;justify-content:space-between;gap:10px}.range-row output{font-variant-numeric:tabular-nums;font-weight:650}fieldset{border:0;padding:0;margin:0;min-width:0}legend{font-weight:600;font-size:.94rem;padding:0;margin-bottom:6px}.chips{display:flex;flex-wrap:wrap;gap:7px}.chips label{font-size:.89rem;padding:6px 11px;border-radius:999px;border:1.5px solid var(--border);background:var(--surface);cursor:pointer;user-select:none}.chips input{position:absolute;opacity:0;width:0;height:0}.chips input:checked+span,.chips label:has(input:checked){border-color:var(--accent);background:var(--accent-soft);color:var(--accent);font-weight:600}.chips label:has(input:focus-visible){outline:3px solid var(--accent);outline-offset:2px}.answer{background:var(--surface);border:1.5px solid var(--border);border-left:5px solid var(--accent);border-radius:var(--radius);padding:18px 20px;box-shadow:var(--shadow)}.answer .headline{font-size:clamp(1.45rem,4vw,1.95rem);font-weight:700;letter-spacing:-.02em;line-height:1.2;margin:0 0 .25em;font-variant-numeric:tabular-nums}.answer .headline em{font-style:normal;color:var(--accent)}.answer .sub{margin:0;color:var(--muted);font-size:.97rem}.figures{display:grid;gap:10px;margin:16px 0 0;padding:0;list-style:none;grid-template-columns:repeat(auto-fit,minmax(8.5rem,1fr))}.figures li{background:var(--raised);border-radius:9px;padding:10px 12px}.figures .k{display:block;font-size:.8rem;color:var(--muted)}.figures .v{display:block;font-size:1.16rem;font-weight:650;font-variant-numeric:tabular-nums}.bars{margin:16px 0 0;padding:0;list-style:none;display:grid;gap:9px}.bars li{display:grid;grid-template-columns:1fr auto;gap:2px 12px;align-items:baseline}.bars .label{font-size:.92rem}.bars .val{font-variant-numeric:tabular-nums;font-weight:600;font-size:.95rem}.bars .track{grid-column:1 / -1;height:7px;background:var(--raised);border-radius:99px;overflow:hidden}.bars .fill{display:block;height:100%;background:var(--accent);border-radius:99px}.notice{background:var(--warn-bg);border:1px solid var(--warn-border);border-radius:9px;padding:11px 13px;font-size:.92rem;margin:14px 0 0}.notice ul{margin:0;padding-left:1.15em}.notice li+li{margin-top:.4em}.notice:empty{display:none}figure{margin:0}.sketch{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:14px;margin:0 0 1.2rem}.sketch svg{width:100%;height:auto;display:block;touch-action:none}.sketch figcaption{font-size:.85rem;color:var(--muted);margin-top:9px}.sketch .handle{cursor:grab}.sketch .handle:active{cursor:grabbing}.prose{max-width:42rem}.prose h2{margin-top:1.8em}.prose ul,.prose ol{padding-left:1.25em}.prose li{margin:.35em 0}.prose code{font-family:var(--mono);font-size:.9em;background:var(--raised);padding:.12em .35em;border-radius:5px}.prose table{width:100%;border-collapse:collapse;margin:1.2em 0;font-size:.95rem}.prose th,.prose td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--border)}.prose th{font-weight:650}.meta{font-size:.87rem;color:var(--muted)}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}.presets{margin:0 0 18px}.presets .presets-label{display:block;font-size:.9rem;color:var(--muted);margin-bottom:8px}.presets .row{display:flex;flex-wrap:wrap;gap:8px}.presets button{font:inherit;font-size:.92rem;font-weight:550;min-height:44px;padding:8px 14px;color:var(--text);background:var(--surface);border:1.5px solid var(--border);border-radius:999px;cursor:pointer;text-align:left}.presets button:hover{border-color:var(--accent);color:var(--accent)}.presets button[aria-pressed=true]{border-color:var(--accent);background:var(--accent-soft);color:var(--accent);font-weight:650}.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}.table-scroll table{margin:0;min-width:28rem}.photo-pair{display:grid;gap:16px;margin:1.8rem 0;grid-template-columns:minmax(0,1fr)}@media(min-width:44rem){.photo-pair{grid-template-columns:repeat(2,minmax(0,1fr));align-items:start}}.photo-pair :global(.photo){margin:0;max-width:none}.photo-pair :global(.photo img){aspect-ratio:16 / 10;object-fit:cover}.switch{display:inline-flex;align-items:center;gap:9px;min-height:44px;cursor:pointer;font-size:.89rem;color:var(--muted);-webkit-user-select:none;user-select:none}.switch input{position:absolute;opacity:0;width:0;height:0}.switch .box{width:20px;height:20px;flex:none;border:1.5px solid var(--border);border-radius:4px;background:var(--surface);display:inline-grid;place-items:center}.switch input:checked+.box{background:var(--accent);border-color:var(--accent)}.switch input:checked+.box:after{content:"";width:10px;height:5px;border-left:2px solid var(--surface);border-bottom:2px solid var(--surface);transform:rotate(-45deg) translateY(-1px)}.switch input:focus-visible+.box{outline:3px solid var(--accent);outline-offset:2px}select,button,input[type=text],input[type=number],input[type=search]{min-height:44px;font-size:max(1rem,16px)}.prose pre{min-height:44px}.prose td a,.how .detail td a{display:inline-flex;align-items:center;min-height:46px}.chips label:has(input:disabled){opacity:.45;cursor:not-allowed}.fitcalc{display:grid;gap:18px;grid-template-columns:minmax(0,1fr);margin:1.2em 0 0}@media(max-width:61.999rem){.fitcalc>.fc-verdict{display:contents}.fitcalc>.fc-verdict>:first-child{order:1}.fitcalc>.fc-plan{order:2}.fitcalc>.fc-verdict>:not(:first-child){order:3}.fitcalc>.fc-inputs{order:4}}@media(min-width:62rem){.fitcalc{grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);align-items:start;column-gap:24px}.fitcalc>.fc-plan{grid-column:1;grid-row:1 / span 2}.fitcalc>.fc-verdict{grid-column:2;grid-row:1}.fitcalc>.fc-inputs{grid-column:2;grid-row:2}.fitcalc>.fc-plan>.planner{position:sticky;top:16px}}.fc-inputs>*+*{margin-top:14px}.figures .v,.clearance-table td{font-variant-numeric:tabular-nums}.clearance-table{width:100%;border-collapse:collapse;font-size:.92rem;margin:14px 0 0}.clearance-table th,.clearance-table td{text-align:left;padding:7px 9px;border-bottom:1px solid var(--border)}.clearance-table th{font-weight:650;color:var(--muted);font-size:.84rem}.clearance-table td:last-child,.clearance-table th:last-child{text-align:right}.clearance-table tr[data-short=true] td{color:var(--bad)}.object-list{list-style:none;margin:0;padding:0;display:grid;gap:8px}.object-list li{display:flex;align-items:center;gap:10px;background:var(--raised);border:1px solid var(--border);border-radius:6px;padding:8px 10px}.object-list .name{flex:1 1 auto;font-size:.92rem;min-width:0}.object-list .dims{font-family:var(--mono);font-size:.82rem;color:var(--muted);white-space:nowrap}.object-list button{background:none;border:1px solid var(--border);border-radius:5px;color:var(--muted);font:inherit;font-size:.84rem;min-height:44px;min-width:44px;cursor:pointer}.object-list button:hover{border-color:var(--bad);color:var(--bad)}
