:root {
  color-scheme: dark;
  --canvas: #181818;
  --editor: #1f1f1f;
  --sidebar: #181818;
  --input: #313131;
  --hover: #2a2d2e;
  --active: #37373d;
  --border: #2b2b2b;
  --border-strong: #454545;
  --text: #cccccc;
  --text-bright: #e7e7e7;
  --muted: #9d9d9d;
  --dim: #6f6f6f;
  --accent: #0078d4;
  --accent-bright: #3794ff;
  --success: #89d185;
  --warning: #cca700;
  --error: #f48771;
  --add: #1b2b20;
  --delete: #321f21;
  --hunk: #17273a;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body { margin: 0; overflow: hidden; color: var(--text); background: var(--canvas); font-size: 13px; }
button, textarea { font: inherit; }
button {
  min-height: 28px;
  border: 1px solid transparent;
  border-radius: 2px;
  background: var(--accent);
  color: #fff;
  padding: 4px 12px;
  font-weight: 600;
  cursor: pointer;
}
button:hover { background: #026ec1; }
button:active { background: #005a9e; }
button:focus-visible, textarea:focus-visible, .line-select:focus-visible, .markdown-block:focus-visible {
  outline: 1px solid var(--accent-bright);
  outline-offset: 1px;
}
button.secondary { border-color: var(--border-strong); background: transparent; color: var(--text); font-weight: 400; }
button.secondary:hover { background: var(--hover); }
button.danger { border-color: #6e3434; background: transparent; color: var(--error); }
button.danger:hover { background: #3b2222; }
[hidden] { display: none !important; }

.titlebar {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  height: 35px;
  padding: 0 8px 0 12px;
  border-bottom: 1px solid var(--border);
  background: var(--editor);
  user-select: none;
}
.product { margin: 0; color: var(--muted); font-size: 11px; font-weight: 700; letter-spacing: .08em; }
.document-title { min-width: 0; display: flex; justify-content: center; align-items: baseline; gap: 8px; padding: 0 12px; }
h1 { margin: 0; overflow: hidden; color: var(--text-bright); font-size: 12px; font-weight: 500; text-overflow: ellipsis; white-space: nowrap; }
.subtitle { margin: 0; overflow: hidden; color: var(--muted); font-size: 11px; text-overflow: ellipsis; white-space: nowrap; }
.titlebar-action { min-height: 24px; padding: 2px 9px; font-size: 12px; }

.workbench { display: grid; grid-template-columns: minmax(0, 1fr) 340px; height: calc(100vh - 35px); }
.editor { display: flex; min-width: 0; min-height: 0; flex-direction: column; background: var(--editor); }
.editor-tabs { display: flex; justify-content: space-between; height: 36px; border-bottom: 1px solid var(--border); background: var(--canvas); }
.editor-tab { display: flex; align-items: center; min-width: 130px; padding: 0 14px; border-top: 1px solid var(--accent); border-right: 1px solid var(--border); background: var(--editor); color: var(--text-bright); }
.editor-content { min-height: 0; flex: 1; overflow: auto; scrollbar-color: #424242 transparent; scrollbar-width: thin; }
.view-toggle { display: flex; align-items: center; gap: 2px; padding: 4px 8px; }
.view-toggle button { min-height: 24px; padding: 2px 9px; background: transparent; color: var(--muted); font-size: 12px; font-weight: 400; }
.view-toggle button:hover { background: var(--hover); color: var(--text); }
.view-toggle button[aria-pressed="true"] { background: var(--active); color: var(--text-bright); }

.markdown-preview { width: min(100%, 920px); margin: 0 auto; padding: 32px clamp(24px, 5vw, 64px) 64px; font-size: 14px; line-height: 1.65; }
.markdown-block { margin: 2px 0; padding: 5px 10px; border: 1px solid transparent; border-left: 2px solid transparent; cursor: pointer; }
.markdown-block:hover { background: var(--hover); }
.markdown-block.selected { border-left-color: var(--accent-bright); background: #25364d; }
.markdown-block.annotated:not(.selected) { border-left-color: var(--warning); background: #2d2a1e; }
.markdown-block > :first-child { margin-top: 0; }
.markdown-block > :last-child { margin-bottom: 0; }
.markdown-preview h1, .markdown-preview h2, .markdown-preview h3, .markdown-preview h4 { color: var(--text-bright); line-height: 1.3; font-weight: 600; }
.markdown-preview h1 { padding-bottom: 7px; border-bottom: 1px solid var(--border-strong); font-size: 24px; }
.markdown-preview h2 { padding-bottom: 5px; border-bottom: 1px solid var(--border); font-size: 20px; }
.markdown-preview h3 { font-size: 16px; }
.markdown-preview p { margin: 8px 0; }
.markdown-preview ul, .markdown-preview ol { margin: 0; padding-left: 24px; }
.markdown-preview li { margin: 3px 0; }
.markdown-block:has(> :is(ul, ol)) { margin: 0; padding-top: 1px; padding-bottom: 1px; }
.markdown-preview blockquote { margin: 10px 0; padding: 2px 12px; border-left: 3px solid #c586c0; color: var(--muted); }
.markdown-preview code { border-radius: 2px; background: #2a2a2a; color: #ce9178; padding: 1px 4px; font-family: "Cascadia Code", Consolas, monospace; font-size: .92em; }
.markdown-preview pre { overflow: auto; padding: 12px 14px; border: 1px solid var(--border); border-radius: 2px; background: var(--canvas); }
.markdown-preview pre code { background: transparent; color: #d4d4d4; padding: 0; }
.markdown-preview table { width: 100%; margin: 10px 0; border-collapse: collapse; }
.markdown-preview th, .markdown-preview td { border: 1px solid var(--border-strong); padding: 6px 8px; text-align: left; }
.markdown-preview th { background: var(--input); color: var(--text-bright); }
.markdown-preview tr:nth-child(even) { background: #232323; }
.markdown-preview a { color: #4daafc; text-underline-offset: 2px; }
.markdown-preview hr { margin: 18px 0; border: 0; border-top: 1px solid var(--border-strong); }
.markdown-preview input[type="checkbox"] { margin-right: 6px; accent-color: var(--accent); }
.md-image { color: var(--warning); font-style: italic; }
.md-raw-html { color: var(--muted); white-space: pre-wrap; }
.md-mermaid { overflow: auto; margin: 10px 0; padding: 12px; border: 1px solid var(--border); background: var(--canvas); }
.md-mermaid-svg { display: block; width: 100%; height: auto; max-height: 72vh; margin: 0 auto; object-fit: contain; }
.md-mermaid-warning { margin: 6px 0 0; color: var(--warning); font-size: 12px; text-align: center; }

.lines { min-width: max-content; padding: 8px 0 48px; font-family: "Cascadia Code", Consolas, monospace; font-size: 13px; line-height: 1.5; }
.line { display: grid; grid-template-columns: 48px 48px 40px minmax(480px, 1fr); min-height: 20px; border-left: 2px solid transparent; }
.line:hover { background: var(--hover); }
.line.selected { border-left-color: var(--accent-bright); background: #25364d; }
.line.addition { border-left-color: var(--success); background: var(--add); }
.line.deletion { border-left-color: var(--error); background: var(--delete); }
.line.hunk { border-left-color: var(--accent-bright); background: var(--hunk); color: #9cdcfe; }
.line.file { margin-top: 8px; border-top: 1px solid var(--border); border-left-color: var(--warning); background: #242424; color: #dcdcaa; font-weight: 600; }
.line.notice { color: var(--muted); font-style: italic; }
.line-number { padding: 1px 7px; color: var(--dim); text-align: right; user-select: none; }
.line-select { width: 100%; min-height: 100%; padding: 0; border: 0; background: transparent; color: var(--dim); font: inherit; font-weight: 400; }
.line-select:hover { background: var(--hover); color: var(--text); }
.line-select[aria-pressed="true"] { background: var(--accent); color: #fff; }
.line code { padding: 1px 12px 1px 5px; white-space: pre; }

.hljs-comment, .hljs-quote { color: #6a9955; }
.hljs-keyword, .hljs-literal, .hljs-selector-tag { color: #569cd6; }
.hljs-string, .hljs-attr, .hljs-symbol, .hljs-bullet { color: #ce9178; }
.hljs-number { color: #b5cea8; }
.hljs-title, .hljs-title.class_, .hljs-built_in, .hljs-type { color: #4ec9b0; }
.hljs-title.function_, .hljs-section { color: #dcdcaa; }
.hljs-variable, .hljs-template-variable, .hljs-property { color: #9cdcfe; }
.hljs-meta, .hljs-regexp, .hljs-selector-class, .hljs-selector-id { color: #c586c0; }
.hljs-emphasis { font-style: italic; }
.hljs-strong { font-weight: 700; }

.sidebar { display: flex; min-width: 0; min-height: 0; flex-direction: column; border-left: 1px solid var(--border); background: var(--sidebar); }
.sidebar-title { display: flex; align-items: center; height: 36px; padding: 0 16px; border-bottom: 1px solid var(--border); }
.sidebar h2 { margin: 0; color: var(--text-bright); font-size: 11px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; }
.sidebar-content { min-height: 0; flex: 1; overflow: auto; padding: 14px 16px; }
.hint { min-height: 18px; margin: 0 0 12px; color: var(--muted); }
label { display: block; margin: 0 0 5px; color: var(--text); font-size: 12px; }
textarea { width: 100%; min-height: 96px; resize: vertical; border: 1px solid var(--border-strong); border-radius: 2px; background: var(--input); color: var(--text-bright); padding: 7px 8px; line-height: 1.45; }
textarea:hover { border-color: #6b6b6b; }
textarea::placeholder { color: #8a8a8a; }
#add { width: 100%; margin-top: 8px; }
.annotations { display: grid; gap: 8px; margin: 14px 0; }
.annotation { padding: 9px 10px; border-left: 2px solid var(--accent-bright); background: var(--editor); }
.annotation strong { color: #9cdcfe; font-size: 12px; font-weight: 600; }
.annotation p { margin: 6px 0 8px; color: var(--text); line-height: 1.45; white-space: pre-wrap; }
.annotation button { min-height: 24px; padding: 2px 8px; border-color: #6e3434; background: transparent; color: var(--error); font-size: 12px; font-weight: 400; }
.annotation button:hover { background: #3b2222; }
.error { min-height: 18px; margin: 8px 0 0; color: var(--error); }
.actions { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 7px; padding: 10px 16px; border-top: 1px solid var(--border); background: var(--sidebar); }
#approve[hidden] ~ #feedback { grid-column: 1 / -1; }
.approve { background: #16825d; }
.approve:hover { background: #147454; }
.submitted { margin: 30vh auto; max-width: 480px; color: var(--text); text-align: center; }

* { scrollbar-color: #424242 transparent; scrollbar-width: thin; }

@media (max-width: 760px) {
  body { overflow: auto; }
  .titlebar { position: sticky; top: 0; z-index: 5; grid-template-columns: auto minmax(0, 1fr) auto; }
  .document-title { justify-content: flex-start; }
  .subtitle { display: none; }
  .workbench { display: block; height: auto; }
  .editor { height: 58vh; min-height: 360px; }
  .sidebar { min-height: 42vh; border-top: 1px solid var(--border); border-left: 0; }
  .sidebar-content { overflow: visible; }
  .markdown-preview { padding: 20px 10px 40px; }
  .markdown-block { padding: 4px 7px; }
  .actions { position: sticky; bottom: 0; }
}