:root{--bg: #ffffff;--bg-sunken: #f4f5f7;--bg-raised: #ffffff;--border: #d8dbe0;--border-strong: #b9bec7;--text: #1c2024;--text-dim: #5d646e;--accent: #0b6bcb;--accent-contrast: #ffffff;--error: #c02626;--error-bg: #fdf0f0;--warning: #96650a;--warning-bg: #fdf6e7;--info-bg: #eef4fb;--mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;--radius: 6px;--header-height: 48px;--syn-text: #1c2024;--syn-comment: #6a737d;--syn-keyword: #a626a4;--syn-string: #1a7f37;--syn-number: #986801;--syn-type: #0550ae;--syn-property: #953800;--syn-function: #6639ba;--syn-punctuation: #57606a;--syn-meta: #4b5563}@media(prefers-color-scheme:dark){:root{--bg: #16181d;--bg-sunken: #101216;--bg-raised: #1d2027;--border: #2e333c;--border-strong: #414855;--text: #e3e6ea;--text-dim: #98a1ae;--accent: #63a7ef;--accent-contrast: #10131a;--error: #f2807a;--error-bg: #2e1b1b;--warning: #e0b558;--warning-bg: #2c2415;--info-bg: #16222f;--syn-text: #e3e6ea;--syn-comment: #8b949e;--syn-keyword: #d2a8ff;--syn-string: #7ee787;--syn-number: #f0b072;--syn-type: #79c0ff;--syn-property: #ffa657;--syn-function: #d2a8ff;--syn-punctuation: #9aa4b2;--syn-meta: #a5b1c2}}*{box-sizing:border-box}html,body{height:100%;margin:0}body{display:flex;flex-direction:column;background:var(--bg);color:var(--text);font:14px/1.5 system-ui,-apple-system,Segoe UI,Roboto,sans-serif}a{color:var(--accent)}.app-header{display:flex;align-items:center;gap:24px;height:var(--header-height);padding:0 16px;border-bottom:1px solid var(--border);background:var(--bg-raised);flex:none}.brand{display:flex;align-items:center;gap:8px;font-weight:600;font-size:16px;text-decoration:none;color:var(--text)}.tabs{display:flex;gap:4px}.tabs a{padding:6px 12px;border-radius:var(--radius);text-decoration:none;color:var(--text-dim)}.tabs a:hover{background:var(--bg-sunken);color:var(--text)}.tabs a.active{background:var(--accent);color:var(--accent-contrast)}.header-right{margin-left:auto;display:flex;align-items:center;gap:16px;font-size:13px}.privacy{padding:3px 8px;border:1px solid var(--border);border-radius:999px;color:var(--text-dim)}main{flex:1;min-height:0;display:flex}.view{flex:1;min-height:0;display:flex;flex-direction:column;padding:12px 16px 0;gap:10px}.view[hidden]{display:none}.split{flex:1;min-height:0;display:grid;grid-template-columns:1fr 1fr;gap:12px}@media(max-width:900px){.split{grid-template-columns:1fr;grid-template-rows:1fr 1fr}}.pane{display:flex;flex-direction:column;min-height:0;min-width:0;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;background:var(--bg-raised)}.pane-head{display:flex;align-items:center;gap:8px;padding:6px 8px;border-bottom:1px solid var(--border);background:var(--bg-sunken);min-height:38px}.pane-title{font-weight:600;font-size:13px;color:var(--text-dim)}.editor{flex:1;min-height:0;overflow:auto}.cm-editor{height:100%;font-family:var(--mono);font-size:13px}.cm-editor.cm-focused{outline:none}.cm-scroller{font-family:var(--mono)}.options{display:flex;flex-wrap:wrap;align-items:center;gap:8px 14px;padding:8px 10px;border:1px solid var(--border);border-radius:var(--radius);background:var(--bg-sunken);flex:none}.options label{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--text-dim)}.options label.check{gap:5px;color:var(--text)}.options code{font-family:var(--mono);font-size:12px;background:var(--bg);padding:0 3px;border-radius:3px}select,textarea,button,input[type=file]{font:inherit;color:inherit}select{padding:4px 6px;border:1px solid var(--border-strong);border-radius:4px;background:var(--bg-raised)}button.ghost{padding:4px 10px;border:1px solid var(--border-strong);border-radius:4px;background:var(--bg-raised);cursor:pointer}button.ghost:hover:not(:disabled){border-color:var(--accent);color:var(--accent)}button.ghost:disabled{opacity:.5;cursor:default}.pane-head .ghost{margin-left:auto}.file-tabs{display:flex;gap:4px;overflow-x:auto;min-width:0}.file-tab{padding:3px 10px;border:1px solid transparent;border-radius:4px;background:transparent;cursor:pointer;font-family:var(--mono);font-size:12px;color:var(--text-dim);white-space:nowrap}.file-tab.active{background:var(--bg-raised);border-color:var(--border);color:var(--text)}.pane.stale .editor{opacity:.45}.stale-badge{display:none;padding:2px 8px;border-radius:999px;font-size:11px;background:var(--warning-bg);color:var(--warning);border:1px solid currentColor;white-space:nowrap}.pane.stale .stale-badge{display:inline-block}.messages{flex:none;max-height:22vh;overflow-y:auto;display:flex;flex-direction:column;gap:4px}.messages:empty{display:none}.message{padding:6px 10px;border-radius:4px;border-left:3px solid transparent;font-size:13px}.message.error{background:var(--error-bg);border-left-color:var(--error);color:var(--error)}.message.warning{background:var(--warning-bg);border-left-color:var(--warning);color:var(--warning)}.message.info{background:var(--info-bg);border-left-color:var(--accent);color:var(--text-dim)}.decode-input{flex:none;display:flex;flex-direction:column;gap:8px}#payload-text{width:100%;min-height:90px;max-height:28vh;resize:vertical;padding:8px 10px;border:1px solid var(--border);border-radius:var(--radius);background:var(--bg-raised);font-family:var(--mono);font-size:13px}.options label.file{position:relative;overflow:hidden;cursor:pointer}.options label.file input[type=file]{position:absolute;inset:0;opacity:0;cursor:pointer}.options label.file span{padding:4px 10px;border:1px dashed var(--border-strong);border-radius:4px}.payload-status:empty{display:none}.status{font-size:12px;font-family:var(--mono)}.status.ok{color:var(--text-dim)}.status.error{color:var(--error)}.tree-wrap{flex:1;min-height:0;display:flex;flex-direction:column;gap:6px}.tree-toolbar{display:flex;gap:6px;flex:none}.tree{flex:1;min-height:0;overflow:auto;padding:4px 0 16px}.tree-root,.tree-children{list-style:none;margin:0;padding:0}.tree-children{margin-left:14px;padding-left:12px;border-left:1px solid var(--border)}.tree-node summary{list-style:none;cursor:pointer}.tree-node summary::-webkit-details-marker,.tree-node summary::marker{display:none;content:""}.node-row,.tree-node summary{display:flex;flex-wrap:wrap;align-items:center;gap:6px;padding:3px 4px;border-radius:4px}.tree-node summary:hover,.node-row.leaf:hover{background:var(--bg-sunken)}.twisty{width:12px;flex:none;color:var(--text-dim);transition:transform .12s ease}.twisty:not(.empty):before{content:"▸"}details[open]>summary .twisty:not(.empty){transform:rotate(90deg)}@media(prefers-reduced-motion:reduce){.twisty{transition:none}}.node-body{margin:2px 0 6px 18px;display:flex;flex-direction:column;gap:4px}.hex-inline{display:inline-flex;flex-wrap:wrap;gap:3px;margin-left:auto;font-size:11px;opacity:.85}.chip{padding:1px 6px;border-radius:3px;font-size:11px;font-family:var(--mono);border:1px solid var(--border);color:var(--text-dim);white-space:nowrap}.chip-field{color:var(--accent);border-color:var(--accent)}.chip-offset{border-style:dashed}.primary{font-family:var(--mono);font-size:13px}.primary.string{color:#157f3b}.primary.structural{color:var(--text-dim);font-style:italic}@media(prefers-color-scheme:dark){.primary.string{color:#6fd08c}}.primary .kind,.reading em{font-style:normal;font-size:11px;color:var(--text-dim);margin-left:6px}.reading em{margin:0 4px 0 0}.alternatives{display:flex;flex-wrap:wrap;align-items:baseline;gap:6px;font-size:12px}.label{font-size:11px;text-transform:uppercase;letter-spacing:.04em;color:var(--text-dim);min-width:44px}.hex{font-family:var(--mono);padding:0 4px;border-radius:3px;word-break:break-all}.hex-tag{background:var(--info-bg);color:var(--accent)}.hex-len{background:var(--warning-bg);color:var(--warning)}.hex-value{background:var(--bg-sunken);color:var(--text-dim)}.hex-end{background:var(--info-bg);color:var(--text-dim)}.reading{font-family:var(--mono);padding:1px 6px;border:1px solid var(--border);border-radius:3px;color:var(--text-dim)}.app-footer{flex:none;display:flex;gap:16px;padding:8px 16px;border-top:1px solid var(--border);background:var(--bg-raised);font-size:12px;color:var(--text-dim)}.app-footer span:last-child{margin-left:auto}.boot-overlay{position:fixed;inset:0;display:grid;place-items:center;background:var(--bg);z-index:10}.boot-inner{display:flex;flex-direction:column;align-items:center;gap:12px;color:var(--text-dim);max-width:60ch;text-align:center}.spinner{width:28px;height:28px;border:3px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@media(prefers-reduced-motion:reduce){.spinner{animation-duration:3s}}