@import url('https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=DM+Sans:wght@400;500;600;700&family=Manrope:wght@400;500;600;700;800&display=swap');
:root{--beam-color:#78b7e5;--support-color:#172b40;--paper:#f4f3ef;--white:#fff;--ink:#202a27;--muted:#7c8580;--line:#e7e9e4;--green:#246b53;--mint:#eaf3ed;--orange:#d9824a;--shadow:0 5px 24px #1e33220a}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:'DM Sans',sans-serif;font-size:14px}.topbar{height:64px;padding:0 max(calc((100vw - 1320px)/2),32px);background:#fff;border-bottom:1px solid #eceee9;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font:800 12px Manrope,sans-serif;letter-spacing:1.4px}.brand-mark{width:28px;height:28px;border-radius:8px;background:var(--green);color:white;display:grid;place-items:center;font:700 17px Manrope}.brand-light{font-weight:500;color:#87908b;margin-left:4px}.top-note,.eyebrow,.status,.metric>span{font:500 10px 'DM Mono',monospace;letter-spacing:1.15px;color:#8a938e}.top-note i{display:inline-block;width:7px;height:7px;border-radius:50%;background:#65aa7b;margin-left:5px}main{max-width:1320px;padding:0 32px;margin:auto}.intro{padding:38px 0 30px}.eyebrow{color:var(--green)}h1,h2,h3,p{margin:0}h1{font:700 34px Manrope,sans-serif;letter-spacing:-1.5px;margin:8px 0 5px}.intro p{color:#76807b;font-size:14px}.workspace{display:grid;grid-template-columns:390px minmax(0,1fr);gap:24px;align-items:start;padding-bottom:50px}.inputs{display:grid;gap:14px}.card,.diagram-card,.plot-card,.metric{background:var(--white);border:1px solid #e9ebe7;border-radius:10px;box-shadow:var(--shadow)}.card{padding:20px}.card-head{display:flex;gap:12px;align-items:flex-start;margin-bottom:19px}.step{background:var(--mint);color:var(--green);font:500 11px 'DM Mono',monospace;padding:6px 7px;border-radius:5px}.card h2,.result-heading h2{font:700 16px Manrope,sans-serif}.card-head p,.diagram-header p{font-size:12px;color:#89918c;margin-top:4px}label{font-size:11px;font-weight:600;color:#68736d;display:block;margin:13px 0 0}.row{display:grid;grid-template-columns:1fr 100px;gap:12px}input:not([type=checkbox]),select{display:block;width:100%;height:37px;margin-top:6px;border:1px solid #e2e6e1;border-radius:6px;background:#fff;color:var(--ink);padding:0 10px;font:500 13px 'DM Sans',sans-serif;outline:none}input:focus,select:focus{border-color:#73a78c;box-shadow:0 0 0 3px #246b5312}.field-unit{float:right;color:#89918c;font-weight:400}.dimension-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 12px}.material-note{margin-top:14px;border-top:1px solid var(--line);padding-top:11px;font-size:11px;color:#87908b}.list-title{display:flex;justify-content:space-between;align-items:center;color:#647069;font-size:11px;font-weight:700;margin:18px 0 3px}.text-button{border:0;background:none;color:var(--green);font:600 11px 'DM Sans',sans-serif;cursor:pointer}.dynamic-list{display:grid;gap:8px}.dynamic-row{display:grid;grid-template-columns:1fr 1fr 30px;gap:8px;align-items:end;padding:9px;background:#f8f9f7;border-radius:6px}.dynamic-row label{margin:0;font-size:10px}.dynamic-row input,.dynamic-row select{height:33px;font-size:12px}.remove{height:32px;border:0;background:transparent;color:#9b7770;font-size:17px;cursor:pointer}.hint{font-size:10px;line-height:1.5;color:#929a95;margin-top:11px}.checkline{display:flex;gap:9px;align-items:flex-start;margin-top:18px;padding-top:14px;border-top:1px solid var(--line);cursor:pointer}.checkline input{accent-color:var(--green);margin:2px 0 0}.checkline b{font-size:11px;color:#47514b}.checkline small{display:block;font-size:10px;color:#929a95;margin-top:3px}.load-row{grid-template-columns:1fr 1fr 30px}.load-row.load-point,.load-row.load-moment{grid-template-columns:1fr 1fr 1fr 30px}.load-row .load-extra{grid-column:1/3}.calculate{height:47px;border:0;border-radius:7px;background:var(--green);color:white;padding:0 17px;font:600 13px Manrope,sans-serif;text-align:left;cursor:pointer;box-shadow:0 5px 12px #246b5320}.calculate span{float:right;font-size:18px;line-height:15px}.calculate:hover{background:#1e5c46}.results{min-width:0}.result-heading{display:flex;justify-content:space-between;align-items:center;margin:2px 1px 15px}.result-heading h2{font-size:19px;margin-top:5px}.status{background:#fff;border:1px solid var(--line);border-radius:20px;padding:7px 10px;font-size:9px}.diagram-card{padding:17px 19px 10px}.diagram-header{display:flex;justify-content:space-between;align-items:flex-start}.diagram-header h3,.plot-card h3{font:700 13px Manrope,sans-serif}.legend{display:flex;gap:13px;color:#8a938e;font-size:10px}.legend i{display:inline-block;width:7px;height:7px;background:var(--orange);margin-right:5px;border-radius:2px}.legend-beam{background:var(--beam-color)!important}.legend-support{background:var(--support-color)!important}svg{width:100%;display:block}.diagram-card svg{height:178px;margin-top:5px}.message{font-size:11px;color:#929a95;padding:11px 2px;min-height:34px}.metric-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.metric{padding:14px 16px;min-height:89px}.metric>span{font-size:9px;letter-spacing:.75px}.metric b{display:block;font:700 21px Manrope,sans-serif;margin:6px 0 1px;letter-spacing:-.5px}.metric small{font-size:10px;color:#909994}.metric-wide{grid-column:span 2}.metric-wide b{font-size:23px}.plots{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:10px}.plot-card{padding:14px 15px}.plot-card>div:first-child{display:flex;justify-content:space-between}.plot-card>div:first-child span{font:10px 'DM Mono',monospace;color:#929a95}.plot-card svg{height:115px;margin-top:8px}.technical{border-bottom:1px solid #dedfd9;padding:12px 2px;color:#647069;font-size:11px}.technical summary{cursor:pointer;font-weight:600}.technical p{margin-top:9px;line-height:1.65;color:#818a84}footer{font-size:10px;color:#9aa19c;padding:13px 2px}.message.error{color:#b34f41}.diagram-label{font:11px 'DM Mono',monospace;fill:#748078}.plot-label{font:10px 'DM Mono',monospace;fill:#87918a}
@media(max-width:900px){.workspace{grid-template-columns:340px 1fr;gap:15px}main{padding:0 20px}.topbar{padding:0 20px}.plots{grid-template-columns:1fr}}@media(max-width:690px){.workspace{grid-template-columns:1fr}.inputs{order:1}.results{order:2}.intro{padding:28px 0 20px}h1{font-size:29px}.status{font-size:8px}.diagram-card svg{height:150px}}
[hidden]{display:none!important}
.load-row .load-extra{grid-column:auto}
.section-preview{margin-top:16px;padding:8px 10px 10px;background:#f8f9f7;border:1px solid var(--line);border-radius:7px}.section-preview svg{height:170px}.section-preview svg text{font:11px 'DM Mono',monospace;fill:#647069}.section-dimensions{display:flex;flex-wrap:wrap;justify-content:center;gap:5px 12px;color:#7c8580;font:10px 'DM Sans',sans-serif}.section-dimensions b{color:#47514b;font-weight:600}
.round-section line:nth-of-type(2),.round-section text:nth-of-type(2),.round-section+.section-dimensions{display:none}
.tube-section line:nth-of-type(2),.tube-section text:nth-of-type(2),.tube-section+.section-dimensions{display:none}
.load-row.load-point,.load-row.load-moment,.load-row.load-udl{grid-template-columns:minmax(0,1fr) minmax(0,1fr) 24px}
.load-row>label:nth-child(1){grid-column:1;grid-row:1}
.load-row>label:nth-child(2){grid-column:2;grid-row:1}
.load-row>label:nth-child(3){grid-column:1;grid-row:2}
.load-row>label.load-magnitude{grid-column:1/3;grid-row:2}
.load-value-unit{display:flex;align-items:center;gap:8px;margin-top:6px}
.load-value-unit input{flex:1;min-width:0;margin-top:0}
.load-value-unit select.load-unit{width:85px;flex:none;margin-top:0;padding:0 4px;background:transparent;border:0;border-radius:0;color:var(--green);font-weight:600;cursor:pointer;box-shadow:none}
.load-row.load-udl>label:nth-child(4){grid-column:1;grid-row:3}
.load-row>.remove{grid-column:3;grid-row:1}
.plot-y-label{font-size:14px;fill:#647069}

.inputs .card > .calculate{display:block;width:100%;margin-top:18px}

.plot-card{position:relative}
.plot-card svg{cursor:crosshair}
.plot-tooltip{position:absolute;z-index:2;pointer-events:none;max-width:calc(100% - 12px);padding:7px 9px;border-radius:6px;background:var(--ink);color:white;box-shadow:0 3px 12px #202a2720;font:11px "DM Sans",sans-serif;line-height:1.4}

.plot-lookup{display:grid;grid-template-columns:minmax(0,110px) minmax(0,1fr);gap:12px;align-items:end;margin-top:12px;padding-top:12px;border-top:1px solid var(--line)}
.plot-lookup label{margin:0}
.plot-lookup-result{min-width:0}
.plot-lookup-result>span{display:block;font-size:11px;font-weight:600;color:#68736d}
.plot-lookup output{display:block;min-height:37px;padding-top:10px;font:600 12px 'DM Sans',sans-serif;line-height:1.5;color:var(--green);overflow-wrap:anywhere}
.plot-lookup input[aria-invalid=true]{border-color:#b34f41}

.plot-unit-controls{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:12px}
.plot-unit-controls label{margin:0}
.plot-unit-controls select{height:32px;font-size:12px}