:root{--bg: #0a0a0a;--surface: #0f0f0f;--surface-hover: #1a1a1a;--border: #1a3a1a;--text: #33ff33;--text-dim: #1a991a;--text-bright: #66ff66;--accent: #33ff33;--error: #ff3333;--success: #33ff33;--warning: #ffcc00;--glow: 0 0 4px rgba(51, 255, 51, .4);--glow-strong: 0 0 8px rgba(51, 255, 51, .6);--font: "IBM Plex Mono", "Fira Code", "Cascadia Code", "Courier New", monospace;--sidebar-width: 220px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body{height:100%;background:var(--bg);color:var(--text);font-family:var(--font);font-size:13px;line-height:1.6}::selection{background:var(--text);color:var(--bg)}#app{display:flex;height:100%}#sidebar{width:var(--sidebar-width);background:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column;flex-shrink:0;overflow-y:auto}.sidebar-header{padding:14px 16px;border-bottom:1px solid var(--border)}.sidebar-header h1{font-family:var(--font);font-size:14px;font-weight:700;color:var(--text-bright);text-transform:uppercase;letter-spacing:.15em;text-shadow:var(--glow)}#nav{display:flex;flex-direction:column;padding:8px 0;flex:1}.sidebar-footer{padding:10px 16px;border-top:1px solid var(--border);font-size:11px;color:var(--text-dim);text-align:center}.sidebar-footer a{color:var(--text);text-decoration:none;text-shadow:var(--glow)}.sidebar-footer a:hover{color:var(--text-bright)}.nav-item{display:block;width:100%;padding:4px 16px;background:none;border:none;color:var(--text-dim);font-family:var(--font);font-size:13px;text-align:left;cursor:pointer;transition:color .1s}.nav-item:before{content:"  ";white-space:pre}.nav-item:hover{color:var(--text);background:none}.nav-item.active{color:var(--text-bright);background:none;text-shadow:var(--glow)}.nav-item.active:before{content:"> "}#main{flex:1;overflow-y:auto;padding:24px 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.15s}textarea:focus,input[type=text]:focus,input[type=number]:focus,select:focus{border-color:var(--text);box-shadow:var(--glow)}textarea{resize:vertical;min-height:120px}textarea::placeholder,input::placeholder{color:var(--text-dim);opacity:.5}select{cursor:pointer;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%231a991a'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 10px center;padding-right:28px}button{background:transparent;border:1px solid var(--border);color:var(--text-dim);font-family:var(--font);font-size:12px;padding:5px 12px;border-radius:0;cursor:pointer;text-transform:uppercase;letter-spacing:.05em;transition:color .1s,border-color .1s,text-shadow .1s}button:hover{color:var(--text);border-color:var(--text);background:transparent}button.primary{border-color:var(--text);color:var(--text);text-shadow:var(--glow)}button.primary:hover{color:var(--text-bright);border-color:var(--text-bright);box-shadow:var(--glow)}button.copied{border-color:var(--text-bright);color:var(--text-bright);text-shadow:var(--glow-strong)}.btn-row{display:flex;gap:6px;flex-wrap:wrap}.output-box{background:var(--bg);border:1px solid var(--border);border-radius:0;padding:12px;font-family:var(--font);font-size:13px;white-space:pre-wrap;word-break:break-all;min-height:40px;color:var(--text)}.output-box.error{border-color:var(--error);color:var(--error);text-shadow:0 0 4px rgba(255,51,51,.4)}.output-box.success{border-color:var(--success);text-shadow:var(--glow)}.inline-row{display:flex;gap:8px;align-items:center}.inline-row input{flex:1}.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:16px}.result-item{display:flex;align-items:center;justify-content:space-between;padding:8px 12px;background:var(--bg);border:1px solid var(--border);border-radius:0;margin-bottom:6px}.result-item .label{font-size:10px;font-weight:700;color:var(--text-dim);text-transform:uppercase;letter-spacing:.08em;margin-bottom:2px}.result-item .value{font-family:var(--font);font-size:13px;word-break:break-all;flex:1}.result-item button{margin-left:8px;flex-shrink:0}.color-preview{width:100%;height:60px;border:1px solid var(--border);border-radius:0}.diff-line{padding:1px 8px;font-family:var(--font);font-size:13px;white-space:pre}.diff-line.add{background:#33ff3314;color:var(--success)}.diff-line.add:before{content:"+ "}.diff-line.remove{background:#ff333314;color:var(--error)}.diff-line.remove:before{content:"- "}.diff-line.equal{color:var(--text-dim)}.diff-line.equal:before{content:"  "}.match-highlight{background:#3f33;border-bottom:1px solid var(--text);text-shadow:var(--glow)}#app:after{content:"";position:fixed;inset:0;background:repeating-linear-gradient(0deg,rgba(0,0,0,.15) 0px,rgba(0,0,0,.15) 1px,transparent 1px,transparent 3px);pointer-events:none;z-index:9999}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:var(--bg)}::-webkit-scrollbar-thumb{background:var(--border)}::-webkit-scrollbar-thumb:hover{background:var(--text-dim)}.boot{position:fixed;inset:0;background:#0a0a0a;z-index:99999;display:flex;align-items:center;justify-content:center;transition:opacity .4s ease-out}.boot.fade-out{opacity:0}.boot-screen{font-family:var(--font);font-size:14px;color:var(--text);line-height:1.8}.boot-line{opacity:0;animation:boot-reveal .05s forwards;white-space:pre}.boot-line:first-child{color:var(--text-bright);font-weight:700;text-shadow:var(--glow-strong);margin-bottom:8px}.boot-ok{color:var(--text-bright);text-shadow:var(--glow)}.boot-cursor{animation:blink .6s step-end infinite}@keyframes 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