:root{--c-navy: #0a1f44;--c-primary: #1d7af3;--c-primary-d: #1260c9;--c-cyan: #19c3e6;--c-ink: #0b1b33;--c-muted: #5a6a82;--c-bg: #f5f8fc;--c-card: #fff;--c-line: #e1e8f2;--c-field: #fff;--c-code: #f1f5fb;--c-ok: #16a34a;--c-err: #dc2626;--radius: 14px;--header-h: 64px;--font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", "Noto Sans Devanagari", "Kohinoor Devanagari", "Nirmala UI", "Mangal", Roboto, sans-serif;--mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", "Noto Sans Mono CJK SC", monospace;color-scheme:light}html.dark{--c-navy: #e6edf7;--c-primary: #4c97f6;--c-primary-d: #7ab2fa;--c-ink: #e6edf7;--c-muted: #93a4bd;--c-bg: #0b1220;--c-card: #111a2c;--c-line: #25324a;--c-field: #0d1626;--c-code: #0d1626;color-scheme:dark}html:lang(ja){--font: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", "Yu Gothic", Meiryo, "Noto Sans JP", "Segoe UI", Roboto, sans-serif}*,*:before,*:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}body{margin:0;font-family:var(--font);color:var(--c-ink);background:var(--c-bg);line-height:1.6}img{max-width:100%;display:block}a{color:inherit;text-decoration:none}[hidden]{display:none!important}.container{width:100%;max-width:1200px;margin-inline:auto;padding-inline:max(16px,env(safe-area-inset-left))}.site-header{position:sticky;top:0;z-index:50;background:#ffffffeb;-webkit-backdrop-filter:saturate(160%) blur(10px);backdrop-filter:saturate(160%) blur(10px);border-bottom:1px solid var(--c-line);padding-top:env(safe-area-inset-top)}html.dark .site-header{background:#0b1220eb}.bar{display:flex;align-items:center;min-height:var(--header-h);position:relative;gap:12px}.brand{display:block;margin-right:auto}.brand img{width:200px;height:auto}html.dark .brand img{filter:invert(1) hue-rotate(180deg) brightness(1.15) saturate(1.1)}.nav{display:flex;align-items:stretch;align-self:stretch;gap:2px}.nav a{position:relative;display:flex;align-items:center;padding:0 16px;color:var(--c-navy);transition:color .2s}.nav a span{font-size:15px;font-weight:600}.nav a:after{content:"";position:absolute;left:16px;right:16px;bottom:0;height:3px;border-radius:3px 3px 0 0;background:linear-gradient(90deg,var(--c-primary),var(--c-cyan));transform:scaleX(0);transition:transform .25s}.nav a:hover{color:var(--c-primary)}.nav a:hover:after,.nav a.active:after{transform:scaleX(1)}.nav a.active{color:var(--c-primary)}.menu-btn{display:none;background:none;border:0;padding:10px;cursor:pointer}.menu-btn span{display:block;width:24px;height:2.5px;margin:5px 0;background:var(--c-navy);border-radius:2px;transition:transform .25s,opacity .25s}.open .menu-btn span:nth-child(1){transform:translateY(7.5px) rotate(45deg)}.open .menu-btn span:nth-child(2){opacity:0}.open .menu-btn span:nth-child(3){transform:translateY(-7.5px) rotate(-45deg)}.lang-menu{position:relative;order:2}.lang-current{display:inline-flex;align-items:center;gap:.35rem;height:34px;padding:0 .8rem;font:600 13px var(--font);color:var(--c-navy);background:transparent;border:1px solid var(--c-line);border-radius:999px;cursor:pointer}.lang-current:hover{border-color:var(--c-primary)}.lang-caret{border:4px solid transparent;border-top-color:currentColor;border-bottom-width:0;opacity:.7}.lang-list{display:none;position:absolute;top:calc(100% + 6px);right:0;z-index:60;min-width:9rem;margin:0;padding:.35rem;list-style:none;background:var(--c-card);border:1px solid var(--c-line);border-radius:12px;box-shadow:0 14px 28px #0000002e}.lang-list.show{display:block}.lang-list a{display:block;padding:.45rem .7rem;border-radius:8px;font-size:14px;white-space:nowrap}.lang-list a:hover{background:var(--c-code)}.lang-list a.active{color:var(--c-primary);font-weight:700}.theme-btn{order:3;display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;color:var(--c-navy);background:transparent;border:1px solid var(--c-line);border-radius:10px;cursor:pointer}.theme-btn:hover{border-color:var(--c-primary);color:var(--c-primary)}.nav{order:1}.menu-btn{order:4}.hero{padding:44px 0 28px;background:radial-gradient(60% 120% at 85% 0%,rgb(25 195 230 / .18),transparent 60%),linear-gradient(120deg,#1d7af31a,#19c3e60f);border-bottom:1px solid var(--c-line)}.hero h1{margin:0 0 8px;font-size:clamp(26px,4vw,40px);color:var(--c-navy);line-height:1.2}.hero-sub{margin:0 0 22px;color:var(--c-muted);max-width:46em}.search{position:relative;max-width:640px}.search svg{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--c-muted);pointer-events:none}.search input[type=search]{width:100%;height:50px;padding:0 16px 0 44px;font:16px var(--font);color:var(--c-ink);background:var(--c-field);border:1px solid var(--c-line);border-radius:14px;outline:none;box-shadow:0 2px 10px #0a1f440f}.search input[type=search]:focus{border-color:var(--c-primary);box-shadow:0 0 0 3px #1d7af32e}.home{padding-bottom:40px}.chips{display:flex;flex-wrap:wrap;gap:8px;margin:22px 0 6px}.chip{padding:7px 14px;font:600 14px var(--font);color:var(--c-ink);background:var(--c-card);border:1px solid var(--c-line);border-radius:999px;cursor:pointer}.chip:hover{border-color:var(--c-primary)}.chip.active{color:#fff;background:var(--c-primary);border-color:var(--c-primary)}.cat-sec{margin-top:22px}.cat-sec h2,.more h2{margin:0 0 12px;font-size:18px;color:var(--c-navy)}.empty{margin:40px 0;text-align:center;color:var(--c-muted)}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:12px}.card{display:flex;gap:12px;align-items:flex-start;padding:14px;background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--radius);transition:transform .15s,box-shadow .15s,border-color .15s}.card:hover{transform:translateY(-2px);border-color:var(--c-primary);box-shadow:0 8px 22px #0a1f441a}.card-body{min-width:0}.card h3{margin:0 0 2px;font-size:16px;color:var(--c-navy)}.card p{margin:0;font-size:13px;color:var(--c-muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.ico{flex:none;display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:12px;color:#fff;font:700 15px var(--mono);letter-spacing:-.5px;background:linear-gradient(135deg,#1d7af3,#19c3e6)}.ico-dev{background:linear-gradient(135deg,#1d7af3,#19c3e6)}.ico-encode{background:linear-gradient(135deg,#7c3aed,#a78bfa)}.ico-gen{background:linear-gradient(135deg,#059669,#34d399)}.ico-text{background:linear-gradient(135deg,#d97706,#fbbf24)}.ico-image{background:linear-gradient(135deg,#db2777,#f472b6)}.ico-calc{background:linear-gradient(135deg,#0891b2,#22d3ee)}.ico-convert{background:linear-gradient(135deg,#4f46e5,#818cf8)}.toolpage{padding-top:18px;padding-bottom:48px}.crumb{display:flex;gap:8px;align-items:center;font-size:14px;color:var(--c-muted)}.crumb a:hover{color:var(--c-primary)}.toolpage h1{margin:10px 0 4px;font-size:clamp(24px,3.4vw,32px);color:var(--c-navy)}.lead{margin:0 0 18px;color:var(--c-muted);max-width:52em}.tool{padding:16px;background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--radius)}.more{margin-top:32px}.panes{display:grid;grid-template-columns:1fr 1fr;gap:14px}.panes.one{grid-template-columns:1fr}.pane{min-width:0;display:flex;flex-direction:column;gap:6px}.pane-head{display:flex;align-items:center;justify-content:space-between;gap:8px;min-height:30px;font-weight:600;font-size:14px;color:var(--c-navy)}.pane-head .acts{display:flex;gap:6px;flex-wrap:wrap}textarea,input[type=text],input[type=number],input[type=search],input[type=datetime-local],input[type=date],input[type=password],select{font:14px var(--font);color:var(--c-ink);background:var(--c-field);border:1px solid var(--c-line);border-radius:10px;padding:8px 10px;outline:none}textarea:focus,input:focus,select:focus{border-color:var(--c-primary);box-shadow:0 0 0 3px #1d7af326}textarea{width:100%;min-height:260px;resize:vertical;font-family:var(--mono);font-size:13px;line-height:1.55;-moz-tab-size:2;tab-size:2;white-space:pre;overflow:auto;background:var(--c-code)}textarea.wrap{white-space:pre-wrap;word-break:break-word}textarea.sm{min-height:120px}.row{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin:12px 0}.row:first-child{margin-top:0}.row.end{justify-content:flex-end}.field{display:inline-flex;align-items:center;gap:6px;font-size:14px}.field.col{flex-direction:column;align-items:flex-start}.field input[type=checkbox],.field input[type=radio]{width:16px;height:16px;accent-color:var(--c-primary)}.field input[type=number],.field input[type=text],.field select{min-width:0}.field input[type=range]{accent-color:var(--c-primary)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:7px 14px;font:600 14px var(--font);color:var(--c-ink);background:var(--c-card);border:1px solid var(--c-line);border-radius:10px;cursor:pointer;transition:border-color .15s,background .15s}.btn:hover{border-color:var(--c-primary);color:var(--c-primary)}.btn-primary{color:#fff;background:var(--c-primary);border-color:var(--c-primary)}.btn-primary:hover{color:#fff;background:var(--c-primary-d);border-color:var(--c-primary-d)}.btn-sm{padding:3px 10px;font-size:13px;border-radius:8px}.btn:disabled{opacity:.5;cursor:not-allowed}.status{min-height:22px;margin:8px 0 0;font-size:14px}.status[data-kind=err]{color:var(--c-err)}.status[data-kind=ok]{color:var(--c-ok)}.out{padding:10px 12px;font:13px/1.6 var(--mono);background:var(--c-code);border:1px solid var(--c-line);border-radius:10px;white-space:pre-wrap;word-break:break-all;min-height:40px}.kv{width:100%;border-collapse:collapse;font-size:14px}.kv th,.kv td{padding:7px 10px;text-align:left;border-bottom:1px solid var(--c-line);vertical-align:top}.kv th{width:9em;color:var(--c-muted);font-weight:600;white-space:nowrap}.kv td{font-family:var(--mono);font-size:13px;word-break:break-all}.kv td .btn{margin-left:6px}.badge{display:inline-block;padding:1px 8px;font-size:12px;font-weight:600;color:#fff;background:var(--c-primary);border-radius:999px}.badge.ok{background:var(--c-ok)}.badge.err{background:var(--c-err)}.dropzone{display:flex;align-items:center;justify-content:center;min-height:120px;padding:18px;text-align:center;color:var(--c-muted);border:2px dashed var(--c-line);border-radius:12px;cursor:pointer;transition:border-color .15s,background .15s}.dropzone:hover,.dropzone.over{border-color:var(--c-primary);background:#1d7af30f}.preview{max-width:100%;max-height:360px;margin:8px auto 0;border-radius:8px;background:repeating-conic-gradient(#e5e7eb 0 25%,#fff 0 50%) 0 0 / 16px 16px}html.dark .preview{background:repeating-conic-gradient(#1f2937 0 25%,#111a2c 0 50%) 0 0 / 16px 16px}.mono{font-family:var(--mono)}.muted{color:var(--c-muted);font-size:13px}.diff{font:13px/1.55 var(--mono);border:1px solid var(--c-line);border-radius:10px;overflow:auto;max-height:520px;background:var(--c-code)}.diff div{padding:0 10px;white-space:pre-wrap;word-break:break-all}.diff .add{background:#16a34a2e}.diff .del{background:#dc262629}.diff .ctx{color:var(--c-muted)}mark.m{background:#facc158c;color:inherit;border-radius:3px}.md-out{padding:12px 16px;border:1px solid var(--c-line);border-radius:10px;min-height:260px;overflow:auto;background:var(--c-field)}.md-out pre{background:var(--c-code);padding:10px;border-radius:8px;overflow:auto}.md-out code{font-family:var(--mono);font-size:.92em}.md-out img{max-width:100%}.md-out table{border-collapse:collapse}.md-out th,.md-out td{border:1px solid var(--c-line);padding:4px 10px}.md-out blockquote{margin:0;padding-left:12px;border-left:4px solid var(--c-line);color:var(--c-muted)}.swatch{width:100%;height:96px;border-radius:12px;border:1px solid var(--c-line)}.qr-box{display:flex;justify-content:center;padding:16px;background:#fff;border-radius:12px;border:1px solid var(--c-line)}.qr-box svg,.qr-box canvas,.qr-box img{max-width:100%;height:auto}.meter{height:8px;border-radius:999px;background:var(--c-line);overflow:hidden}.meter i{display:block;height:100%;width:0;background:var(--c-err);transition:width .2s,background .2s}.stat{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:10px}.stat div{padding:10px 12px;background:var(--c-code);border:1px solid var(--c-line);border-radius:10px}.stat b{display:block;font-size:22px;color:var(--c-navy)}.stat span{font-size:12px;color:var(--c-muted)}.tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:10px}.tab{padding:6px 12px;font:600 14px var(--font);color:var(--c-ink);background:transparent;border:1px solid var(--c-line);border-radius:8px;cursor:pointer}.tab.active{color:#fff;background:var(--c-primary);border-color:var(--c-primary)}.toast{position:fixed;left:50%;bottom:28px;z-index:100;transform:translate(-50%,20px);padding:9px 18px;font-size:14px;color:#fff;background:#111827;border-radius:999px;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s}.toast.show{opacity:1;transform:translate(-50%)}.toast[data-kind=err]{background:var(--c-err)}.site-footer{margin-top:24px;padding:22px 0 calc(22px + env(safe-area-inset-bottom));color:var(--c-muted);font-size:14px;border-top:1px solid var(--c-line)}.foot{display:flex;flex-wrap:wrap;gap:6px 24px;justify-content:space-between}.foot p{margin:0}@media(max-width:960px){.menu-btn{display:block}.brand img{width:160px}.nav{display:none;position:absolute;top:100%;left:0;right:0;flex-direction:column;align-items:stretch;background:var(--c-card);border-bottom:1px solid var(--c-line);padding:6px 0;box-shadow:0 12px 24px #0000001f}.open .nav{display:flex}.nav a{padding:12px 20px}.nav a:after{display:none}.nav a.active{background:#1d7af314}}@media(max-width:720px){.panes,.grid{grid-template-columns:1fr}.hero{padding:28px 0 20px}textarea{min-height:200px}}@media print{.site-header,.site-footer,.more{display:none}}