:root{color-scheme:light dark}
body{margin:0;background:light-dark(#edf0f3,#10161f);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif}
#lathe-app{--page:light-dark(#f8fafc,#18212c);--surface:light-dark(#fff,#202c3b);--ink:light-dark(#172a42,#e8eef8);--muted:light-dark(#657487,#acb9ca);--line:light-dark(#dce3eb,#36475d);--soft:light-dark(#f0f4f8,#263449);--key:light-dark(#225a9f,#a1c4ff);--on-key:light-dark(#fff,#142742);--tint:light-dark(#eaf1fa,#293f5e);--danger:light-dark(#ac302c,#ffaba5);--mono:"SFMono-Regular","Menlo",Consolas,monospace;color:var(--ink);font-size:14px;line-height:1.5;width:100%;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif}
#lathe-app[data-theme="orange"]{--page:light-dark(#edf0f1,#20262b);--surface:light-dark(#fafbfb,#29323a);--ink:light-dark(#262d33,#eef1f4);--muted:light-dark(#646d75,#b2bec6);--line:light-dark(#d2d9de,#45525b);--soft:light-dark(#e5e9ec,#333e47);--key:light-dark(#b84b17,#ffb17f);--on-key:light-dark(#fff,#2a180d);--tint:light-dark(#f9eee5,#4e3627)}
#lathe-app[data-theme="green"]{--page:light-dark(#f7f8f3,#22291f);--surface:light-dark(#fdfef9,#2c3528);--ink:light-dark(#2a382e,#eaf1e5);--muted:light-dark(#667363,#b3bfad);--line:light-dark(#d8dfd1,#43533d);--soft:light-dark(#edf1e6,#354230);--key:light-dark(#476146,#b4d3a6);--on-key:light-dark(#fff,#21311a);--tint:light-dark(#e9f0df,#3e5034)}
#lathe-app *{box-sizing:border-box}
#lathe-app [hidden]{display:none!important}
#lathe-app .app-shell{position:relative;background:var(--page);max-width:440px;min-height:830px;margin:20px auto;border:1px solid var(--line);border-radius:20px;overflow:clip;display:flex;flex-direction:column;box-shadow:0 14px 48px light-dark(#18304a0a,#00000025)}
#lathe-app .app-brand{display:flex;align-items:center;gap:9px;padding:20px 22px 17px;border-bottom:1px solid var(--line);font-size:13px;font-weight:600}
#lathe-app .brand-mark{display:grid;place-items:center;background:var(--key);color:var(--on-key);width:25px;height:25px;border-radius:4px;font-size:13px;font-weight:500}
#lathe-app .local-mode{margin-left:auto;font-size:11px;font-weight:400;color:var(--muted)}
#lathe-app main{flex:1;padding:24px 22px 28px;min-width:0}
#lathe-app h1{font-size:26px;line-height:1.3;font-weight:600;letter-spacing:-.7px;margin:0 0 7px}
#lathe-app h2{font-size:14px;font-weight:600;margin:0}
#lathe-app h3{font-size:13px;font-weight:600;margin:0}
#lathe-app p{margin:0}
#lathe-app button,#lathe-app input,#lathe-app select,#lathe-app textarea{font:inherit}
#lathe-app button{color:inherit;cursor:pointer}
#lathe-app button:disabled{cursor:default;opacity:.38}
#lathe-app button:focus-visible,#lathe-app input:focus-visible,#lathe-app select:focus-visible,#lathe-app textarea:focus-visible,#lathe-app a:focus-visible{outline:2px solid var(--key);outline-offset:3px}
#lathe-app .subtitle{font-size:12px;color:var(--muted);line-height:1.7}
#lathe-app .page-heading{margin-bottom:22px}
#lathe-app .eyebrow{color:var(--muted);font-size:11px;letter-spacing:1px;margin-bottom:7px}
#lathe-app .section-head{display:flex;justify-content:space-between;align-items:center;gap:8px;margin:24px 0 11px}
#lathe-app .text-button{border:0;background:transparent;color:var(--key);font-size:12px;padding:8px 0;min-height:36px}
#lathe-app .search{display:flex;align-items:center;gap:10px;background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:0 12px;min-height:44px;margin:14px 0 16px;color:var(--muted)}
#lathe-app .search input{width:100%;min-width:0;background:transparent;border:0;color:var(--ink);font-size:14px;padding:11px 0}
#lathe-app .search-symbol{font-family:var(--mono);font-size:19px}
#lathe-app .machine-banner{display:flex;align-items:center;justify-content:space-between;gap:10px;width:100%;padding:10px 12px;background:var(--soft);border:0;border-radius:5px;font-size:11px;text-align:left;color:var(--muted)}
#lathe-app .machine-banner strong{font-size:12px;color:var(--ink);font-weight:500}
#lathe-app .continue-card{display:block;text-align:left;width:100%;border:1px solid var(--line);background:var(--surface);border-radius:7px;padding:16px 16px 14px;margin:14px 0 5px;position:relative}
#lathe-app .continue-card:before{content:"";position:absolute;left:0;top:15px;bottom:15px;width:3px;background:var(--key)}
#lathe-app .continue-top{display:flex;justify-content:space-between;font-size:11px;color:var(--muted)}
#lathe-app .continue-card h2{font-size:17px;margin:9px 0 4px}
#lathe-app .continue-result{display:flex;align-items:baseline;justify-content:space-between;margin-top:14px;gap:8px}
#lathe-app .continue-result strong{font-family:var(--mono);font-size:26px;font-weight:500;letter-spacing:-.7px}
#lathe-app .continue-result span{font-size:12px;color:var(--key)}
#lathe-app .tool-grid{display:grid;grid-template-columns:1fr 1fr;gap:9px}
#lathe-app .tool-card{display:flex;align-items:center;gap:10px;min-width:0;min-height:77px;text-align:left;background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:12px 10px}
#lathe-app .tool-symbol{display:grid;place-items:center;flex-shrink:0;width:29px;height:32px;background:var(--tint);color:var(--key);border-radius:3px;font-family:var(--mono);font-size:18px}
#lathe-app .tool-card strong{display:block;font-size:12px;font-weight:500}
#lathe-app .tool-card small{display:block;font-size:11px;color:var(--muted);margin-top:4px}
#lathe-app .recent-row,#lathe-app .tool-row{display:flex;gap:12px;align-items:center;justify-content:space-between;width:100%;border:0;border-bottom:1px solid var(--line);text-align:left;padding:14px 0;background:transparent}
#lathe-app .recent-row>span:first-child,#lathe-app .tool-row>span:first-child{min-width:0;flex:1}
#lathe-app .tool-row strong,#lathe-app .recent-row strong{display:block;font-size:13px;font-weight:500}
#lathe-app .tool-row small,#lathe-app .recent-row small{display:block;font-size:11px;color:var(--muted);margin-top:4px;line-height:1.6}
#lathe-app .row-arrow{color:var(--muted);font-size:19px;font-weight:400}
#lathe-app .chips{display:flex;flex-wrap:wrap;gap:6px;margin:14px 0 18px}
#lathe-app .chip{font-size:11px;min-height:34px;padding:7px 10px;border:1px solid var(--line);background:var(--surface);color:var(--muted);border-radius:4px}
#lathe-app .chip[aria-pressed="true"]{background:var(--key);border-color:var(--key);color:var(--on-key)}
#lathe-app .tool-group{margin-bottom:24px}
#lathe-app .tool-group-title{display:flex;justify-content:space-between;align-items:center;background:var(--soft);padding:7px 10px;font-size:11px;color:var(--muted)}
#lathe-app .bottom-nav{display:grid;grid-template-columns:repeat(4,1fr);padding:8px 12px 15px;border-top:1px solid var(--line);background:var(--surface);gap:4px}
#lathe-app .bottom-nav button{border:0;border-radius:5px;background:transparent;color:var(--muted);min-height:44px;font-size:12px}
#lathe-app .bottom-nav button[aria-current="page"]{background:var(--tint);color:var(--key);font-weight:600}
#lathe-app .backline{display:flex;justify-content:space-between;align-items:center;gap:12px;margin:-10px 0 13px}
#lathe-app .backline button{min-height:36px;padding:4px 0;border:0;background:transparent;color:var(--muted);font-size:12px}
#lathe-app .backline .is-pinned{color:var(--key)}
#lathe-app .calc-title{font-size:23px;margin-bottom:8px}
#lathe-app .calc-context{display:flex;gap:7px;flex-wrap:wrap;font-size:11px;color:var(--muted);margin-bottom:18px}
#lathe-app .calc-context span+span:before{content:"·";padding-right:7px}
#lathe-app .drawing{margin:12px 0;background:var(--soft);border:1px solid var(--line);border-radius:5px;padding:8px 5px 4px;color:var(--key)}
#lathe-app .drawing svg{display:block;width:100%;height:178px;overflow:visible}
#lathe-app .drawing text{fill:var(--muted);font-family:var(--mono);font-size:14px}
#lathe-app .drawing .part{fill:color-mix(in srgb,var(--key) 6%,var(--surface));stroke:var(--key);stroke-width:1.7}
#lathe-app .drawing .dimension{fill:none;stroke:var(--muted);stroke-width:1}
#lathe-app .drawing .axis{fill:none;stroke:var(--muted);stroke-width:.8;stroke-dasharray:7 3 2 3;opacity:.7}
#lathe-app .drawing .active-dimension{fill:var(--key);font-weight:600}
#lathe-app .drawing-caption{display:flex;justify-content:space-between;flex-wrap:wrap;gap:4px 10px;font-size:11px;color:var(--muted);padding:1px 6px 4px}
#lathe-app .input-row{display:flex;align-items:center;justify-content:space-between;gap:8px;min-height:62px;border-bottom:1px solid var(--line);padding:7px 0}
#lathe-app .input-label{font-size:12px;max-width:52%;line-height:1.6}
#lathe-app .input-box{display:flex;align-items:center;gap:6px;width:46%;min-width:105px;padding:8px;background:var(--surface);border:1px solid var(--line);border-radius:4px}
#lathe-app .input-box:focus-within{border-color:var(--key);background:var(--tint)}
#lathe-app .input-box input{border:0;background:transparent;font-family:var(--mono);font-size:20px;color:var(--ink);min-width:0;width:100%;text-align:right;padding:0}
#lathe-app .input-box span{font-size:11px;color:var(--muted);white-space:nowrap}
#lathe-app .input-tools{display:flex;align-items:center;gap:6px;padding:7px 0}
#lathe-app .input-tools button{min-height:40px;padding:5px 8px;background:transparent;border:0;font-size:12px;color:var(--muted)}
#lathe-app .input-tools [data-action="history"]{margin-left:auto;color:var(--key);padding-right:0}
#lathe-app .edit-status{font-size:11px;color:var(--muted);padding:0 0 9px}
#lathe-app .edit-status:empty{display:none}
#lathe-app .error{font-size:12px;color:var(--danger);padding:11px 0}
#lathe-app .result-box{background:var(--surface);border:1px solid var(--line);border-top:2px solid var(--key);border-radius:4px;margin-top:12px;padding:14px}
#lathe-app .result-top{display:flex;align-items:center;justify-content:space-between;font-size:11px;color:var(--muted);margin-bottom:11px}
#lathe-app .result-main strong{font-family:var(--mono);font-size:35px;font-weight:500;letter-spacing:-1px;font-variant-numeric:tabular-nums;overflow-wrap:anywhere;line-height:1.3}
#lathe-app .result-main .unit{font-size:16px;margin-left:6px;color:var(--muted)}
#lathe-app .secondary-result{display:flex;justify-content:space-between;align-items:baseline;gap:12px;padding-top:10px;font-size:12px;color:var(--muted)}
#lathe-app .secondary-result strong{font-family:var(--mono);font-size:15px;font-weight:500;color:var(--ink);overflow-wrap:anywhere;text-align:right}
#lathe-app .secondary-result strong span{font-size:11px;margin-left:5px;color:var(--muted)}
#lathe-app details{font-size:12px;color:var(--muted);margin:14px 0}
#lathe-app summary{min-height:38px;padding:8px 0;cursor:pointer}
#lathe-app .formula{font-family:var(--mono);font-size:11px;line-height:1.8;overflow-wrap:anywhere}
#lathe-app .note{font-size:11px;line-height:1.8;margin-top:8px;color:var(--muted)}
#lathe-app .inline-notice{font-size:11px;color:var(--muted);background:var(--soft);border-left:2px solid var(--line);padding:10px 12px;margin:15px 0;line-height:1.8}
#lathe-app .action-pair{display:grid;grid-template-columns:1fr 1.5fr;gap:8px;margin-top:16px}
#lathe-app .primary,#lathe-app .secondary{display:flex;justify-content:center;align-items:center;gap:8px;min-height:45px;padding:11px 14px;border-radius:4px;font-size:12px;border:1px solid var(--line)}
#lathe-app .primary{background:var(--key);color:var(--on-key);border-color:var(--key)}
#lathe-app .secondary{background:var(--surface);color:var(--ink)}
#lathe-app .full{width:100%;margin-top:12px}
#lathe-app .meta-fields{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:15px}
#lathe-app .form-label{display:block;font-size:11px;color:var(--muted);margin-bottom:13px}
#lathe-app .form-label input,#lathe-app .form-label select,#lathe-app .form-label textarea{width:100%;min-height:43px;padding:9px 10px;background:var(--surface);border:1px solid var(--line);border-radius:4px;color:var(--ink);margin-top:6px;font-size:14px}
#lathe-app .form-label textarea{resize:vertical;min-height:70px}
#lathe-app .history-list{margin:0 0 10px;padding:0;list-style:none;border-top:1px solid var(--line)}
#lathe-app .history-list li{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:11px 0;border-bottom:1px solid var(--line);font-size:12px}
#lathe-app .history-list small{display:block;font-size:11px;color:var(--muted);margin-top:4px}
#lathe-app .history-list button{font-size:11px;min-height:36px;background:var(--tint);color:var(--key);border:0;border-radius:4px;padding:6px 8px}
#lathe-app .empty{padding:24px 0 18px;font-size:12px;line-height:1.8;color:var(--muted);text-align:center}
#lathe-app .record-card{background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:14px;margin:10px 0}
#lathe-app .record-open{border:0;background:transparent;display:block;width:100%;text-align:left;padding:0}
#lathe-app .record-meta{display:flex;justify-content:space-between;gap:10px;color:var(--muted);font-size:11px;margin-bottom:7px}
#lathe-app .record-card h2{font-size:14px;margin:4px 0 6px}
#lathe-app .record-result{font-family:var(--mono);font-size:21px;letter-spacing:-.5px;margin:9px 0 3px}
#lathe-app .record-actions{display:flex;align-items:center;gap:15px;border-top:1px solid var(--line);padding-top:4px;margin-top:10px}
#lathe-app .record-actions button{background:transparent;border:0;font-size:11px;min-height:35px;color:var(--key);padding:3px 0}
#lathe-app .comparison{border-collapse:collapse;width:100%;font-size:11px;margin-top:14px}
#lathe-app .comparison th,#lathe-app .comparison td{text-align:right;padding:9px 3px;border-bottom:1px solid var(--line);font-weight:400;overflow-wrap:anywhere}
#lathe-app .comparison th:first-child,#lathe-app .comparison td:first-child{text-align:left}
#lathe-app .comparison th{color:var(--muted)}
#lathe-app .changed{color:var(--key);font-weight:600!important}
#lathe-app .theme-options{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:13px 0 24px}
#lathe-app .theme-option{padding:11px 7px 10px;border:1px solid var(--line);border-radius:5px;background:var(--surface);font-size:11px;color:var(--muted)}
#lathe-app .theme-option[aria-pressed="true"]{border-color:var(--key);box-shadow:inset 0 0 0 1px var(--key);color:var(--ink)}
#lathe-app .swatch{height:40px;display:block;border-radius:3px;margin-bottom:8px;background:linear-gradient(90deg,var(--preview-paper) 66%,var(--preview-key) 66%)}
#lathe-app .settings-section{margin:22px 0;padding-top:16px;border-top:1px solid var(--line)}
#lathe-app .settings-row{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:59px;border-bottom:1px solid var(--line);font-size:12px}
#lathe-app .settings-row select{max-width:54%;background:var(--surface);color:var(--ink);font-size:12px;border:1px solid var(--line);border-radius:4px;padding:7px;min-height:36px}
#lathe-app .machine-card{background:var(--surface);border:1px solid var(--line);padding:13px;border-radius:5px;margin:9px 0}
#lathe-app .machine-card.selected{border-color:var(--key)}
#lathe-app .machine-card .machine-card-top{display:flex;align-items:center;justify-content:space-between;gap:10px}
#lathe-app .machine-card strong{font-size:13px;font-weight:500}
#lathe-app .machine-card small{font-size:11px;color:var(--muted);display:block;margin:5px 0}
#lathe-app .machine-buttons{display:flex;gap:16px;margin-top:6px}
#lathe-app .machine-buttons button{font-size:11px;color:var(--key);background:transparent;border:0;min-height:35px;padding:5px 0}
#lathe-app .status-label{color:var(--muted);font-size:11px}
#lathe-app .handbook-row{padding:15px 0;border-bottom:1px solid var(--line)}
#lathe-app .handbook-row strong{font-family:var(--mono);font-size:15px;color:var(--key);display:block;margin:6px 0}
#lathe-app a{color:var(--key);text-decoration:underline;text-underline-offset:3px;overflow-wrap:anywhere}
#lathe-app .app-toast{margin:0 22px;font-size:11px;color:var(--key);line-height:1.6}
#lathe-app .app-toast:not(:empty){padding:8px 0}
#lathe-app .storage-warning{background:var(--soft);color:var(--danger);font-size:11px;padding:8px 12px;line-height:1.6}
#lathe-app .backup-box{width:100%;min-height:110px;background:var(--surface);color:var(--ink);font-family:var(--mono);font-size:11px;border:1px solid var(--line);border-radius:4px;padding:10px}
#lathe-app .section-description{font-size:11px;color:var(--muted);margin:8px 0 12px;line-height:1.7}
#lathe-app .check-row{display:flex;align-items:center;gap:10px;font-size:12px;min-height:44px}
#lathe-app .check-row input{accent-color:var(--key);width:17px;height:17px}
@media(max-width:480px){#lathe-app .app-shell{margin:0 auto;border-radius:0;border-left:0;border-right:0;box-shadow:none;min-height:100svh}#lathe-app main{padding:22px 18px 25px}#lathe-app .app-brand{padding-left:18px;padding-right:18px}#lathe-app .tool-grid{gap:7px}#lathe-app .tool-card{gap:8px;padding:10px 8px}#lathe-app .tool-symbol{width:25px;font-size:16px}#lathe-app .calc-title{font-size:21px}}
@media(prefers-reduced-motion:reduce){#lathe-app *{scroll-behavior:auto!important}}
@media(pointer:coarse){#lathe-app button,#lathe-app summary,#lathe-app select{min-height:44px}#lathe-app .search input,#lathe-app .form-label input,#lathe-app .form-label textarea,#lathe-app .form-label select,#lathe-app .settings-row select,#lathe-app .backup-box{font-size:16px}#lathe-app .settings-row{flex-wrap:wrap;padding:8px 0}}