:root{--bg:#f8f7f3;--surface:#fff;--ink:#202e36;--muted:#627078;--line:#e5e6e0;--accent:#b94732;--accent-soft:#fff0e9;--accent-vivid:#eb795a;--result:#24353c;--result-text:#fff1d8;--art:#f0ede5;--hill:#648278;--hill-dark:#294c48;--sun:#edb774;--radius:18px;font-family:Inter,"Segoe UI",Arial,sans-serif;color:var(--ink);background:var(--bg);font-synthesis:none}
:root[data-theme=forest]{--bg:#f4f6f0;--accent:#347153;--accent-soft:#e9f3e8;--accent-vivid:#5d9970;--result:#253d32;--result-text:#e7f1d5;--art:#e9eee1;--hill:#8caa78;--hill-dark:#456f50;--sun:#d9b45d}
:root[data-theme=blue]{--bg:#f5f7fb;--accent:#3656be;--accent-soft:#edf0ff;--accent-vivid:#6a85ec;--result:#23365a;--result-text:#e4edff;--art:#e9edf5;--hill:#8a9fc6;--hill-dark:#4c648c;--sun:#efbd81}
*{box-sizing:border-box}body{margin:0}button,input{font:inherit}button,a,input,summary{-webkit-tap-highlight-color:transparent}button,a,summary{touch-action:manipulation}button{cursor:pointer}a{color:inherit;text-decoration:none}svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}.svg-defs{position:absolute;width:0;height:0;overflow:hidden}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:4px}input:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.design-bar{min-height:43px;padding:0 max(24px,calc((100vw - 1100px)/2));display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);font-size:10px;letter-spacing:1.5px;font-weight:650}.version{color:var(--muted);margin-left:9px}.themes{display:flex;gap:2px}.swatch{width:36px;height:40px;border:0;background:transparent;position:relative}.swatch:before{content:"";display:block;width:15px;height:15px;border-radius:50%;background:var(--swatch);margin:auto}.swatch[aria-pressed=true]:after{content:"";position:absolute;inset:8px 6px;border:1px solid var(--swatch);border-radius:50%}.coral{--swatch:#b94732}.forest{--swatch:#347153}.blue{--swatch:#3656be}.header{max-width:1100px;margin:auto;height:89px;display:flex;justify-content:space-between;align-items:center}.brand{font-size:29px;font-weight:750;letter-spacing:-1.5px;display:inline-flex;align-items:center}.brand-dot{color:var(--accent)}.brand-mark{width:23px;height:23px;display:grid;grid-template-columns:1fr 1fr;gap:3px;margin-right:11px;transform:rotate(-7deg)}.brand-mark span{background:var(--ink);border-radius:2px}.brand-mark span:last-child{background:var(--accent-vivid)}.browse{display:flex;gap:13px;align-items:center;font-size:13px;min-height:44px;font-weight:600}.browse svg{width:18px}main{max-width:1000px;margin:0 auto}.breadcrumb{display:flex;gap:12px;font-size:12px;color:var(--muted);margin:27px 0 32px}.breadcrumb span:first-child{color:var(--ink)}.breadcrumb span:nth-child(2){opacity:.4}.intro{margin-bottom:35px}.eyebrow{font-size:10px;letter-spacing:1.6px;color:var(--accent);font-weight:700;display:flex;align-items:center;gap:7px}.eyebrow>span{width:6px;height:6px;background:var(--accent);border-radius:50%}h1{font-size:58px;line-height:1.12;letter-spacing:-2.8px;margin:17px 0 17px;font-weight:650}h1>span{color:var(--accent)}.intro p{color:var(--muted);font-size:15px;line-height:1.8;margin:0}.workspace{display:grid;grid-template-columns:1.1fr 1fr;gap:24px;align-items:start}.calculator{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:27px;box-shadow:0 8px 20px #202e3603}.card-heading{display:flex;align-items:center;gap:12px;margin-bottom:29px}.tool-icon{width:39px;height:42px;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center;border-radius:11px}.card-heading h2{font-size:16px;letter-spacing:-.4px;margin:0 0 4px}.card-heading div>span{font-size:11px;color:var(--muted)}.free-badge{margin-left:auto;color:var(--accent);background:var(--accent-soft);font-size:9px;font-weight:700;letter-spacing:.8px;padding:5px 7px;border-radius:5px}.section-label{display:flex;gap:8px;align-items:center;font-size:12px;font-weight:600;margin-bottom:13px}.step{font-size:10px;color:var(--accent);font-weight:650}.unit{margin-left:auto;font-size:9px;color:var(--muted);font-weight:500}.dimension-row{display:flex;align-items:end;gap:8px}.field{flex:1;min-width:0}label{display:block;font-size:11px;color:var(--muted);margin-bottom:7px}input{width:100%;min-width:0;min-height:52px;border:1px solid var(--line);border-radius:9px;background:var(--bg);padding:10px 13px;color:var(--ink);font-size:22px;font-weight:550;letter-spacing:-.6px;font-variant-numeric:tabular-nums;appearance:textfield}input::-webkit-inner-spin-button{appearance:none}.swap{height:52px;width:44px;flex-shrink:0;border:0;background:none;color:var(--muted);display:grid;place-items:center}.swap:hover{color:var(--accent)}.presets{display:grid;grid-template-columns:repeat(4,1fr);gap:7px;margin:14px 0 24px}.presets button{border:1px solid var(--line);background:white;border-radius:7px;min-height:49px;color:var(--ink);font-size:12px;font-weight:650;padding:7px 2px}.presets button span{display:block;font-size:9px;color:var(--muted);margin-top:4px;font-weight:400}.presets button[aria-pressed=true]{background:var(--accent-soft);border-color:var(--accent);color:var(--accent)}.presets button[aria-pressed=true] span{color:var(--accent)}.result{background:var(--result);color:var(--result-text);border-radius:12px;padding:19px 21px}.result-top{display:flex;justify-content:space-between;align-items:center;font-size:9px;letter-spacing:1.1px;color:#d2dcdb}.live{font-size:10px;letter-spacing:0;display:flex;gap:5px;align-items:center}.live i{width:5px;height:5px;border-radius:50%;background:#b8d4a6}.ratio-line{display:flex;justify-content:space-between;align-items:center;margin:10px 0 12px}#ratio{font-size:57px;letter-spacing:-2px;font-weight:500;line-height:1.15;overflow-wrap:anywhere}#ratio span{color:var(--accent-vivid);margin:0 8px}.copy{width:44px;height:44px;color:var(--result-text);border:1px solid #ffffff30;border-radius:9px;background:transparent;flex-shrink:0}.copy svg{width:17px}.copy:hover{background:#ffffff12}.result-meta{display:flex;align-items:center;justify-content:space-between;color:#d2dcdb;font-size:11px}#orientation{font-size:9px;border:1px solid #ffffff25;padding:4px 8px;border-radius:4px}.resize{margin-top:25px}.lock{margin-left:auto;width:13px;height:13px;color:var(--muted)}.resize-fields{display:flex;align-items:center;gap:13px}.resize-fields>div{flex:1;min-width:0}.resize-fields label span{float:right;font-size:10px}.resize-fields input,.resize-fields output{font-size:19px;min-height:47px}.resize-fields output{display:flex;align-items:center;background:var(--accent-soft);border:1px solid transparent;border-radius:9px;padding:10px 13px;color:var(--accent);font-weight:600;overflow-wrap:anywhere}.resize-fields>svg{width:17px;margin-top:20px;color:var(--muted)}.resize-note{font-size:10px;color:var(--muted);line-height:1.5;margin:9px 0 0}.privacy{border-top:1px solid var(--line);padding-top:17px;margin-top:22px;display:flex;align-items:center;justify-content:center;gap:6px;color:var(--muted);font-size:10px}.privacy svg{width:13px;height:13px;color:var(--accent)}.preview-card{background:#f0eee7;background:var(--art);border-radius:var(--radius);overflow:hidden;padding:25px;position:sticky;top:24px}.preview-heading{display:flex;align-items:center;justify-content:space-between;gap:10px}.preview-heading h2{font-size:14px;font-weight:550;margin:0}.preview-heading>span{font-size:8px;letter-spacing:1px;color:var(--muted)}.artboard{height:310px;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:20px;background-image:radial-gradient(#202e3625 .7px,transparent .7px);background-size:14px 14px;margin:26px -5px 17px}.axis{font-size:10px;color:var(--muted);font-variant-numeric:tabular-nums}.picture{position:relative;width:100%;max-width:310px;aspect-ratio:16/9;max-height:230px;overflow:hidden;background:#e8d8bc;outline:1px solid #202e3620;outline-offset:6px;isolation:isolate;transition:width .2s,height .2s}.sun{position:absolute;right:20%;top:14%;width:18%;aspect-ratio:1;border-radius:50%;background:var(--sun)}.hill{position:absolute;width:120%;height:110%;border-radius:48% 48% 0 0;transform:rotate(-25deg)}.hill-back{background:var(--hill);top:60%;left:-35%}.hill-front{background:var(--hill-dark);top:73%;right:-35%;transform:rotate(25deg)}.picture>span{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:27px;color:white;font-weight:500;letter-spacing:1px;text-shadow:0 1px 6px #0006}.corner{position:absolute;width:9px;height:9px;border-color:#fff9;border-style:solid}.tl{top:8px;left:8px;border-width:1px 0 0 1px}.tr{top:8px;right:8px;border-width:1px 1px 0 0}.bl{bottom:8px;left:8px;border-width:0 0 1px 1px}.br{bottom:8px;right:8px;border-width:0 1px 1px 0}.preview-caption{display:flex;justify-content:center;gap:7px;align-items:center;font-size:11px;color:var(--muted);padding-top:17px;border-top:1px solid #202e3615}.caption-dot{width:5px;height:5px;border-radius:50%;background:var(--hill-dark)}.guide{padding:65px 0 35px;margin-top:25px}.guide h2,.faq h2{font-size:27px;letter-spacing:-1px;font-weight:550;margin:14px 0 10px}.guide-heading>p{color:var(--muted);font-size:13px}.guide-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:40px;margin-top:35px}.guide-number{font-size:12px;color:var(--accent)}.guide-grid h3{font-size:14px;font-weight:600}.guide-grid p{font-size:13px;line-height:1.85;color:var(--muted)}.faq{max-width:650px;padding:20px 0 50px}.faq h2{font-size:23px;margin-bottom:20px}details{border-bottom:1px solid var(--line)}summary{cursor:pointer;min-height:58px;display:flex;align-items:center;justify-content:space-between;font-size:13px;font-weight:600;list-style:none}summary::-webkit-details-marker{display:none}summary:after{content:"+";font-size:22px;color:var(--accent);font-weight:400}details[open] summary:after{content:"−"}details p{font-size:13px;color:var(--muted);line-height:1.8;margin:0 25px 20px 0}footer{max-width:1100px;margin:auto;border-top:1px solid var(--line);padding:27px 0 32px;display:flex;align-items:center;gap:20px}footer .brand{font-size:23px}footer>span{font-size:11px;color:var(--muted)}footer small{margin-left:auto;font-size:10px;color:var(--muted)}.toast{position:fixed;bottom:24px;left:50%;transform:translate(-50%,15px);background:var(--ink);color:white;padding:13px 22px;border-radius:10px;font-size:13px;opacity:0;pointer-events:none;transition:.2s;z-index:10}.toast.show{opacity:1;transform:translate(-50%,0)}.error{color:#a73425;font-size:12px;line-height:1.6}.result.invalid{opacity:.5}button{transition:background .15s,transform .15s}button:active{transform:scale(.96)}
@media(min-width:1100px){.intro{position:relative}.intro p{position:absolute;right:10px;bottom:8px}}@media(max-width:1160px){.header,footer{margin-left:30px;margin-right:30px}main{margin:0 40px}}@media(max-width:700px){.design-bar{padding:0 22px;height:43px}.header{height:77px;margin:0 23px}.brand{font-size:27px}.browse{font-size:11px;gap:8px}.brand-mark{width:21px;height:21px}main{margin:0 21px}.breadcrumb{margin:19px 0 27px;font-size:11px}.eyebrow{font-size:8px;letter-spacing:1.35px}h1{font-size:43px;line-height:1.13;letter-spacing:-1.9px;margin:15px 0}.intro p{font-size:13px;line-height:1.8}.intro{margin-bottom:26px}.workspace{display:flex;flex-direction:column;gap:18px}.calculator{width:100%;padding:21px 19px;border-radius:15px}.card-heading{gap:10px;margin-bottom:26px}.card-heading h2{font-size:15px}.card-heading div>span{font-size:10px}.tool-icon{width:35px;height:39px;border-radius:9px}.section-label{font-size:11px}.dimension-row{gap:3px}input{font-size:23px;padding:11px 12px}.presets{gap:6px;margin:13px 0 22px}.presets button{font-size:11px}.presets button span{font-size:9px}.result{padding:17px 19px}#ratio{font-size:55px}.privacy{font-size:9px}.resize{margin-top:24px}.resize-note{font-size:9px}.preview-card{width:100%;padding:23px 21px;position:static;border-radius:15px}.preview-heading h2{font-size:13px}.artboard{height:248px;margin-top:20px;gap:17px}.picture{max-width:260px;max-height:180px}.guide{padding-top:30px;margin-top:16px}.guide h2{font-size:25px;line-height:1.25;max-width:240px}.guide-heading>p{font-size:12px;line-height:1.7}.guide-grid{display:flex;flex-direction:column;gap:17px;margin-top:27px}.guide-grid article{display:grid;grid-template-columns:36px 1fr;column-gap:9px}.guide-number{grid-row:span 2;padding-top:2px}.guide-grid h3{margin:0 0 6px}.guide-grid p{margin:0;font-size:12px}.faq{padding:8px 0 35px}.faq h2{font-size:22px}summary{font-size:12px}footer{margin:0 22px;padding:24px 0;display:flex;flex-wrap:wrap;gap:12px}footer .brand{font-size:23px}footer>span{margin-left:auto;font-size:9px}footer small{margin:0;width:100%;font-size:9px}.toast{white-space:nowrap;max-width:calc(100vw - 24px);font-size:12px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important}}