:root{--bg:#f3f6f5;--panel:#fff;--ink:#142e2a;--muted:#546963;--line:#d5e1dd;--green:#087461;--soft:#e9f4ef;--orange:#a75126;--orange-soft:#fcf0e8;--shadow:0 12px 40px #193e3210;--error:#b63232}
@media(prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#101d1c;--panel:#172a27;--ink:#e4f1ed;--muted:#a9bdb5;--line:#355149;--green:#7ad9bc;--soft:#203c34;--orange:#f4b58d;--orange-soft:#382b25;--shadow:none;--error:#ffa7a1}}
:root[data-theme=dark]{--bg:#101d1c;--panel:#172a27;--ink:#e4f1ed;--muted:#a9bdb5;--line:#355149;--green:#7ad9bc;--soft:#203c34;--orange:#f4b58d;--orange-soft:#382b25;--shadow:none;--error:#ffa7a1;color-scheme:dark}
:root[data-theme=light]{color-scheme:light}html{background:var(--bg);color:var(--ink);font-family:Inter,"Noto Sans TC",system-ui,-apple-system,sans-serif;line-height:1.6}body{min-width:320px}button,input,select{font:inherit}button,a,input,select,summary{-webkit-tap-highlight-color:transparent}button,.button{min-height:44px;border:1px solid var(--line);border-radius:8px;padding:9px 17px;background:var(--panel);color:var(--ink);font-weight:600;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:20px}button:hover:not(:disabled),.button:hover{border-color:var(--green);background:var(--soft)}button:disabled{opacity:.46;cursor:not-allowed}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible,pre:focus-visible{outline:3px solid var(--green);outline-offset:4px}a{color:var(--green)}[hidden]{display:none!important}.shell{max-width:1120px;margin-inline:auto;padding-inline:32px}.masthead{height:104px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{font-size:31px;font-weight:800;letter-spacing:-1.5px;color:var(--ink);text-decoration:none;line-height:1}.brand>span{color:var(--green)}.brand small{display:block;letter-spacing:2.1px;font-size:9px;font-weight:600;margin-top:9px}.header-actions{display:flex;gap:20px;align-items:center}.local-badge{display:flex;align-items:center;gap:8px;color:var(--green);font-size:12px;font-weight:600}.local-badge i{width:6px;height:6px;background:var(--green);border-radius:50%}.quiet{border-color:transparent;background:transparent;font-size:13px}.intro{display:flex;justify-content:space-between;gap:32px;align-items:flex-end;padding:63px 0 40px}.eyebrow,.note-index{font:11px/1.5 ui-monospace,SFMono-Regular,monospace;letter-spacing:1.8px;color:var(--green)}h1{font-size:clamp(32px,4.5vw,48px);letter-spacing:-1.5px;margin:16px 0 16px;line-height:1.25;font-weight:700}.mobile-break{display:none}.lead{font-size:15px;line-height:1.9;margin:0;color:var(--muted)}.intro-note{border-left:1px solid var(--line);padding-left:24px;min-width:228px}.intro-note p{font-size:13px;line-height:1.95;color:var(--muted);margin-bottom:0}.workspace{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:24px;box-shadow:var(--shadow);scroll-margin:24px}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:20px}h2{font-size:16px;letter-spacing:.2px;margin:0}.section-number{font:12px ui-monospace,monospace;color:var(--green);margin-right:10px}.file-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.file-card{min-width:0;border:1px solid var(--line);border-radius:10px;padding:20px;background:var(--soft)}.file-b{background:var(--orange-soft)}.file-caption{display:flex;align-items:center;gap:10px;font:10px ui-monospace,monospace;letter-spacing:1px;color:var(--green);margin-bottom:24px}.file-b .file-caption{color:var(--orange)}.structure-letter{font:600 24px/1 ui-monospace,monospace}.file-card label{font-size:15px;font-weight:650;display:block;margin-bottom:10px}.file-card input{display:block;width:100%;max-width:100%;font-size:12px;color:var(--muted);min-height:44px}.file-card input::file-selector-button{font:600 12px system-ui;min-height:44px;border:1px solid var(--line);padding:8px 12px;border-radius:6px;background:var(--panel);color:var(--ink);margin-right:10px;cursor:pointer}.file-detail{font-size:12px;color:var(--muted);margin:12px 0 0;overflow-wrap:anywhere}.input-note{color:var(--muted);font-size:12px;line-height:1.8;margin:15px 0}.settings{border-top:1px solid var(--line);border-bottom:1px solid var(--line);font-size:12px;margin-top:20px}.settings summary{cursor:pointer;padding:14px 0;font-weight:600;min-height:44px}.settings p{color:var(--muted);line-height:1.9}.settings-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:6px 0 14px}.settings-grid label{font-weight:600}.settings select{display:block;margin-top:6px;width:100%;min-height:44px;background:var(--bg);border:1px solid var(--line);border-radius:6px;color:var(--ink);padding:9px;font-size:12px}.actions{display:flex;align-items:center;gap:10px;margin-top:22px;flex-wrap:wrap}.primary{background:var(--green);color:var(--panel);border-color:var(--green);min-width:184px}.primary:hover:not(:disabled){background:var(--ink);color:var(--panel)}.elapsed{font:12px ui-monospace,monospace;color:var(--muted);margin-left:auto}.status{font-size:13px;color:var(--muted);min-height:21px;margin:14px 0 0;overflow-wrap:anywhere}.status[data-error=true]{color:var(--error)}.result-section{margin-top:35px}.result-section .section-heading{margin-inline:3px}.muted{color:var(--muted);font-size:12px}.empty-result{border:1px dashed var(--line);border-radius:12px;min-height:174px;display:flex;flex-direction:column;justify-content:center;align-items:center;padding:24px;color:var(--muted);text-align:center}.empty-symbol{font:24px ui-monospace,monospace;color:var(--green);letter-spacing:10px}.empty-result p{margin:14px 0 4px;font-size:13px}.empty-result small{font-size:12px}#result{padding:24px;background:var(--panel);border:1px solid var(--line);border-radius:12px}.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.metrics>div{min-width:0;border-right:1px solid var(--line);padding-right:12px}.metrics>div:last-child{border:0}.metrics span{font-size:11px;color:var(--muted);display:block}.metrics strong{display:block;font:500 clamp(20px,2.8vw,28px)/1.7 ui-monospace,monospace;color:var(--green);overflow-wrap:anywhere}.output-header{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;border-top:1px solid var(--line);padding-top:16px;margin-top:20px}h3{font-size:13px;margin:0}.downloads{display:flex;gap:8px}.downloads .button{font-size:12px;padding:8px 12px;gap:0}pre{font:12px/1.8 ui-monospace,SFMono-Regular,Menlo,monospace;background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:20px;overflow:auto;max-height:400px;white-space:pre;margin:16px 0 0;tab-size:4}.output-note{font-size:11px;color:var(--muted);line-height:1.8;margin-bottom:0}.boundary{display:grid;grid-template-columns:160px 1fr;gap:24px;padding:25px 0;margin-top:20px}.boundary-label{font-size:11px;color:var(--green);padding-top:3px}.boundary p{font-size:12px;color:var(--muted);line-height:1.9;margin:0}.boundary strong{font-weight:600;color:var(--ink)}.footer{border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:16px;padding-block:22px;margin-top:10px;font-size:11px;color:var(--muted)}.footer>span:first-child{font-weight:700;color:var(--ink)}.skip{position:fixed;left:16px;top:-90px;background:var(--panel);padding:12px;z-index:3}.skip:focus{top:10px}.notice{padding:16px;border:1px solid var(--error);color:var(--error)}
@media(max-width:700px){.shell{padding-inline:20px}.masthead{height:86px}.header-actions{gap:4px}.local-badge{font-size:11px}.intro{padding:38px 0 26px}.intro-note{display:none}h1{font-size:38px}.lead{font-size:13px}.workspace{padding:18px}.section-heading{margin-bottom:18px;gap:5px}.file-grid{gap:12px}.file-card{padding:16px}.file-caption{font-size:9px;letter-spacing:.2px;margin-bottom:18px}.settings-grid{grid-template-columns:1fr;gap:12px}.metrics{grid-template-columns:1fr 1fr;gap:18px}.metrics>div:nth-child(2){border:0}.metrics strong{font-size:25px}.boundary{grid-template-columns:1fr;gap:8px;padding:22px 2px}.footer{flex-direction:column;gap:6px}.actions .primary{min-width:150px}.elapsed{width:100%;margin-left:0}#result{padding:18px}}
@media(max-width:480px){.shell{padding-inline:16px}.brand{font-size:28px}.brand small{font-size:8px}.header-actions .quiet{font-size:11px;padding:8px}.file-grid{grid-template-columns:1fr}.file-caption{margin-bottom:16px}.file-card input{font-size:12px}.file-card{padding:18px}.file-card label{font-size:14px}.mobile-break{display:block}h1{font-size:38px;line-height:1.35;letter-spacing:-.5px}.intro{padding-top:30px}.eyebrow{font-size:9px;letter-spacing:1.5px}.workspace{padding:16px}h2{font-size:15px}.section-heading .quiet{font-size:11px;padding-inline:6px}.actions{gap:7px}.actions .primary{min-width:145px}.actions>button{padding-inline:12px}.result-section .section-heading{flex-wrap:wrap}.downloads .button{padding-inline:10px}pre{padding:12px}.output-header{gap:14px}.footer{font-size:10px}}
.skip{top:0;clip-path:inset(50%);width:1px;height:1px;overflow:hidden;white-space:nowrap}.skip:focus{clip-path:none;width:auto;height:auto;overflow:visible}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}