:root{color-scheme:light dark;--bg: #f6f8fa;--surface: #ffffff;--surface-2: #eef2f5;--text: #16202a;--muted: #56616e;--border: #d6dde4;--accent: #0b7285;--accent-strong: #095c6b;--accent-soft: #e3f3f6;--on-accent: #ffffff;--error: #b42318;--del-bg: #fdeeee;--del-mark: #f6c6c6;--del-text: #8f1d1d;--ins-bg: #e8f6ed;--ins-mark: #b7e4c6;--ins-text: #12632b;--fold-bg: #eef2f5;--shadow: 0 1px 2px rgb(16 24 32 / 6%), 0 4px 16px rgb(16 24 32 / 5%);--radius: 12px;--font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;--page: 1120px;--gutter: 16px}@media(prefers-color-scheme:dark){:root{--bg: #0e1318;--surface: #151c23;--surface-2: #1c252e;--text: #e5eaef;--muted: #9ba7b3;--border: #2a3541;--accent: #5cc8db;--accent-strong: #8adbe8;--accent-soft: #12313a;--on-accent: #062228;--error: #ff9b8f;--del-bg: #351c1f;--del-mark: #6a2a30;--del-text: #ffb4ab;--ins-bg: #142e1f;--ins-mark: #22573a;--ins-text: #9be2b4;--fold-bg: #1c252e;--shadow: 0 1px 2px rgb(0 0 0 / 30%), 0 4px 16px rgb(0 0 0 / 25%)}}*,*:before,*:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.55 var(--font);min-height:100vh;display:flex;flex-direction:column}main{flex:1}a{color:var(--accent)}a:hover{color:var(--accent-strong)}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.skip{position:absolute;left:-9999px}.skip:focus{left:var(--gutter);top:8px;z-index:10;background:var(--surface);padding:6px 10px;border-radius:8px}.wrap{width:100%;max-width:var(--page);margin:0 auto;padding:0 var(--gutter)}.site-header{border-bottom:1px solid var(--border);background:var(--surface)}.site-header .wrap{display:flex;align-items:center;gap:20px;min-height:60px}.logo{display:inline-flex;align-items:center;gap:10px;color:var(--text);text-decoration:none;font-weight:700;font-size:1.15rem;letter-spacing:-.01em}.logo:hover{color:var(--text)}.logo-mark{width:30px;height:30px;flex:none}.site-nav{display:flex;gap:4px;margin-left:auto}.site-nav a,.lang-switch{color:var(--muted);text-decoration:none;font-size:.95rem;padding:6px 10px;border-radius:8px;white-space:nowrap}.site-nav a:hover,.lang-switch:hover{color:var(--text);background:var(--surface-2)}.site-nav a[aria-current=page]{color:var(--accent);font-weight:600}.lang-switch{border:1px solid var(--border)}@media(max-width:760px){.site-nav{display:none}.lang-switch{margin-left:auto}}.site-footer{margin-top:64px;border-top:1px solid var(--border);color:var(--muted);font-size:.92rem}.site-footer .wrap{display:flex;flex-wrap:wrap;gap:8px 24px;justify-content:space-between;padding-top:20px;padding-bottom:28px}.site-footer p{margin:0}.page-head{padding:36px 0 8px}.page-head h1{margin:0 0 8px;font-size:clamp(1.6rem,1.2rem + 1.6vw,2.2rem);line-height:1.2;letter-spacing:-.02em}.page-head p{margin:0;color:var(--muted);font-size:1.05rem;max-width:62ch}.tool{margin-top:24px}.panes{display:grid;gap:16px}@media(min-width:860px){.panes{grid-template-columns:1fr 1fr}}.pane{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);min-width:0}.pane-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;padding:10px 14px 0}.pane-head label,.pane-head h2{font-weight:600;font-size:.95rem;margin:0}.meta{color:var(--muted);font-size:.85rem;font-variant-numeric:tabular-nums}.pane textarea{display:block;width:100%;min-height:15rem;margin:0;padding:10px 14px;border:0;background:transparent;color:var(--text);font:.95rem/1.5 var(--mono);resize:vertical}.pane textarea:focus{outline:none}.pane:focus-within{border-color:var(--accent)}.pane-bar{display:flex;flex-wrap:wrap;align-items:center;gap:8px;padding:8px 10px;border-top:1px solid var(--border)}.pane-bar .spacer{flex:1}.btn{font:inherit;font-size:.9rem;line-height:1;padding:8px 12px;border-radius:8px;border:1px solid var(--border);background:var(--surface);color:var(--text);cursor:pointer;white-space:nowrap}.btn:hover{background:var(--surface-2)}.btn-primary{background:var(--accent);border-color:var(--accent);color:var(--on-accent);font-weight:600}.btn-primary:hover{background:var(--accent-strong);border-color:var(--accent-strong)}.btn.is-done{color:var(--ins-text);border-color:var(--ins-text)}.options{display:flex;flex-wrap:wrap;align-items:center;gap:10px 20px;margin:16px 0 0}.check{display:inline-flex;align-items:center;gap:8px;cursor:pointer;font-size:.95rem}.check input{width:18px;height:18px;accent-color:var(--accent);margin:0}.segmented{display:inline-flex;border:1px solid var(--border);border-radius:9px;overflow:hidden;background:var(--surface)}.segmented label{position:relative;cursor:pointer}.segmented input{position:absolute;opacity:0;pointer-events:none}.segmented span{display:block;padding:7px 12px;font-size:.9rem}.segmented input:checked+span{background:var(--accent);color:var(--on-accent);font-weight:600}.segmented input:focus-visible+span{outline:2px solid var(--accent);outline-offset:-2px}.message{margin:10px 2px 0;font-size:.92rem;color:var(--muted)}.message.is-error{color:var(--error)}.notice{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin:10px 14px;padding:10px 12px;border-radius:10px;background:var(--accent-soft);font-size:.92rem}.file-pane{margin-top:32px}.dropzone{display:flex;flex-wrap:wrap;align-items:center;gap:10px;padding:14px;border-bottom:1px dashed var(--border);color:var(--muted)}.is-dragging{outline:2px dashed var(--accent);outline-offset:-6px;background:var(--accent-soft)}.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}.diff-out{margin-top:16px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}.diff-head{display:flex;flex-wrap:wrap;align-items:center;gap:8px 16px;padding:10px 14px;border-bottom:1px solid var(--border)}.diff-head h2{margin:0;font-size:.95rem}.stat{font-size:.88rem;font-variant-numeric:tabular-nums;padding:2px 8px;border-radius:999px}.stat-add{background:var(--ins-bg);color:var(--ins-text)}.stat-remove{background:var(--del-bg);color:var(--del-text)}.stat-change{background:var(--surface-2);color:var(--muted)}.diff-empty{margin:0;padding:18px 14px;color:var(--muted)}.diff-table{width:100%;border-collapse:collapse;table-layout:fixed;font:.88rem/1.5 var(--mono)}.diff-table td{vertical-align:top;padding:1px 8px;white-space:pre-wrap;overflow-wrap:anywhere}.diff-table .num{width:3.6em;text-align:right;color:var(--muted);user-select:none;font-variant-numeric:tabular-nums;padding-right:6px}.diff-table .sign{width:1.6em;text-align:center;user-select:none;padding:1px 0}.diff-table .gap{background:var(--surface-2)}.diff-table .split-left{border-right:1px solid var(--border)}.diff-table .del{background:var(--del-bg)}.diff-table .ins{background:var(--ins-bg)}.diff-table del,.diff-table ins{text-decoration:none;border-radius:3px}.diff-table del{background:var(--del-mark);color:var(--del-text)}.diff-table ins{background:var(--ins-mark);color:var(--ins-text)}.diff-table .fold td{background:var(--fold-bg);padding:0}.fold-btn{display:block;width:100%;padding:6px 12px;border:0;background:transparent;color:var(--accent);font:.85rem var(--font);text-align:center;cursor:pointer}.fold-btn:hover{text-decoration:underline}.about{margin-top:48px;max-width:72ch}.about h2,.more h2,.tools-heading{font-size:1.25rem;margin:0 0 12px;letter-spacing:-.01em}.about p{margin:0 0 12px;color:var(--muted)}.prose{max-width:72ch;padding-bottom:8px}.prose h2{font-size:1.2rem;margin:32px 0 8px;letter-spacing:-.01em}.prose p{margin:0 0 12px}.prose .updated{color:var(--muted);font-size:.95rem}.cards{display:grid;gap:16px;padding:0;margin:0;list-style:none}@media(min-width:700px){.cards{grid-template-columns:repeat(auto-fill,minmax(280px,1fr))}}.card{display:flex;gap:14px;height:100%;padding:18px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);color:var(--text);text-decoration:none;transition:border-color .15s,transform .15s}.card:hover{color:var(--text);border-color:var(--accent);transform:translateY(-1px)}.badge{flex:none;display:grid;place-items:center;width:46px;height:46px;border-radius:11px;background:var(--accent-soft);color:var(--accent);font:700 1.05rem var(--mono)}.card h3{margin:2px 0 4px;font-size:1.05rem}.card p{margin:0;color:var(--muted);font-size:.95rem}.more{margin-top:48px}.hero{padding:56px 0 28px}.hero h1{margin:0 0 12px;font-size:clamp(2rem,1.4rem + 2.6vw,3rem);line-height:1.1;letter-spacing:-.03em;max-width:18ch}.hero p{margin:0;font-size:1.15rem;color:var(--muted);max-width:56ch}.points{display:flex;flex-wrap:wrap;gap:8px 20px;padding:0;margin:20px 0 0;list-style:none;color:var(--muted);font-size:.95rem}.points li:before{content:"✓";color:var(--accent);font-weight:700;margin-right:8px}.tools-heading{margin-top:28px}