:root {
  color-scheme: light dark;
  --bg: #f6f8fa;
  --fg: #24292f;
  --border: #d0d7de;
  --accent: #0969da;
  --accent-contrast: #ffffff;
  --accent-soft: rgba(9, 105, 218, 0.18);
  --header-bg: #ffffffcc;
  --pane-bg: #ffffff;
  --code-bg: #f6f8fa;
  --code-fg: #24292f;
  --editor-fg: #24292f;
  --syntax-markup: #af00db;
  --syntax-heading: #0451a5;
  --syntax-link: #0070c1;
  --syntax-code: #a31515;
  --syntax-comment: #008000;
  --syntax-highlight: #795e26;
  --explorer-width: 240px;
}

[data-theme="dark"] {
  --bg: #0d1117;
  --fg: #e6edf3;
  --border: #30363d;
  --accent: #4493f8;
  --accent-contrast: #0d1117;
  --accent-soft: rgba(68, 147, 248, 0.22);
  --header-bg: #161b22cc;
  --pane-bg: #161b22;
  --code-bg: #161b22;
  --code-fg: #e6edf3;
  --editor-fg: #d4d4d4;
  --syntax-markup: #c586c0;
  --syntax-heading: #4fc1ff;
  --syntax-link: #569cd6;
  --syntax-code: #ce9178;
  --syntax-comment: #6a9955;
  --syntax-highlight: #dcdcaa;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--fg);
  height: 100vh;
  display: flex;
  flex-direction: column;
}


.app-header {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 0.6rem;
  padding: 0.6rem 1rem;
  background: var(--header-bg);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-groups {
  display: flex;
  flex: 1;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  min-width: 0;
}

.logo-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-title h1 {
  font-size: 1.25rem;
  margin: 0;
}

.document-title-input {
  border: 1px solid transparent;
  background: transparent;
  color: var(--fg);
  font-size: 0.95rem;
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  min-width: 0;
  max-width: 240px;
}

.document-title-input:focus,
.document-title-input:hover {
  outline: none;
  border-color: var(--accent);
  background: var(--pane-bg);
}

.document-title-input::placeholder {
  color: var(--border);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.pane-toolbar {
  display: flex;
  gap: 0.25rem;
  flex-wrap: wrap;
  align-items: center;
  min-width: 0;
}

.editor-toolbar {
  flex-wrap: nowrap;
  overflow-x: auto;
  padding: 2px;
}

.file-toolbar {
  display: grid;
  grid-template-columns: repeat(2, minmax(112px, 1fr));
  padding: 0.4rem;
  min-width: 250px;
}

.toolbar-group {
  display: inline-flex;
  align-items: center;
  gap: 0.15rem;
  padding-right: 0.35rem;
  margin-right: 0.2rem;
  border-right: 1px solid var(--border);
}

.toolbar-group:last-child {
  border-right: 0;
  padding-right: 0;
  margin-right: 0;
}

.tool-btn,
.file-btn,
.view-toggle button,
.theme-toggle {
  border: 1px solid var(--border);
  background: var(--pane-bg);
  color: var(--fg);
  padding: 0.35rem 0.6rem;
  font-size: 0.85rem;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.tool-btn--icon {
  justify-content: center;
  min-width: 32px;
  padding: 0.35rem;
  font-weight: 600;
}

.tool-btn--bold { font-family: Georgia, serif; font-size: 1rem; font-weight: 800; }
.tool-btn--italic { font-family: Georgia, serif; font-size: 1rem; font-style: italic; }
.tool-btn--strike { text-decoration: line-through; }
.tool-btn--code { font-family: "SFMono-Regular", Consolas, monospace; font-size: 0.75rem; }

.app-menu {
  position: relative;
  flex: 0 0 auto;
}

.app-menu summary {
  list-style: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--pane-bg);
  color: var(--fg);
  cursor: pointer;
  font-size: 0.85rem;
  padding: 0.35rem 0.6rem;
}

.app-menu summary::-webkit-details-marker { display: none; }
.app-menu[open] summary { border-color: var(--accent); background: var(--accent-soft); }
.app-menu .file-toolbar {
  position: absolute;
  z-index: 12;
  top: calc(100% + 0.4rem);
  right: 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--pane-bg);
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.18);
}

.tool-btn:hover,
.file-btn:hover,
.view-toggle button:hover,
.tool-btn:focus,
.file-btn:focus,
.view-toggle button:focus {
  outline: none;
  border-color: var(--accent);
}


.tool-btn:active,
.file-btn:active,
.view-toggle button:active,
.theme-toggle:active {
  background: var(--accent);
  color: var(--accent-contrast);
}

.theme-toggle {
  position: relative;
  width: 64px;
  height: 30px;
  border-radius: 999px;
  padding: 0 8px;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  overflow: hidden;
  gap: 0;
  justify-self: end;
}

.theme-toggle::after {
  content: "";
  position: absolute;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--bg);
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.15);
  top: 2px;
  left: 2px;
  transform: translateX(0);
  transition: transform 0.2s ease;
}

.theme-toggle .icon {
  font-size: 0.9rem;
  line-height: 1;
  z-index: 2;
  transition: opacity 0.2s ease;
  pointer-events: none;
  color: var(--accent);
}

.theme-toggle .sun {
  margin-right: 8px;
}

.theme-toggle .moon {
  margin-left: 8px;
}

[data-theme="dark"] .theme-toggle::after {
  transform: translateX(32px);
}

[data-theme="dark"] .theme-toggle .sun {
  opacity: 0.35;
}

[data-theme="light"] .theme-toggle .moon {
  opacity: 0.35;
}

.app-main {
  flex: 1;
  display: flex;
  min-height: 0;
}

/* Workspace additions: deliberately use the existing palette so they remain
   at home in the lightweight, local-first application. */
/* Compact toolbar restored from the WYSIWYG workspace. */
.app-header { display:grid; grid-template-columns:auto minmax(0,1fr) auto auto; gap:.6rem; padding:.6rem 1rem; }
.header-groups { display:flex; align-items:center; justify-content:space-between; gap:.6rem; }
.editor-toolbar { flex-wrap:nowrap; overflow-x:auto; padding:2px; }
.file-toolbar { display:grid; grid-template-columns:repeat(2, minmax(112px, 1fr)); padding:.4rem; min-width:250px; border-left:0; }
.toolbar-group { display:inline-flex; align-items:center; gap:.15rem; padding-right:.35rem; margin-right:.2rem; border-right:1px solid var(--border); }
.toolbar-group:last-child { border-right:0; padding-right:0; margin-right:0; }
.tool-btn--icon { justify-content:center; min-width:32px; padding:.35rem; font-weight:600; }
.tool-btn--bold { font-family:Georgia,serif; font-size:1rem; font-weight:800; }
.tool-btn--italic { font-family:Georgia,serif; font-size:1rem; font-style:italic; }
.tool-btn--strike { text-decoration:line-through; }
.tool-btn--code { font-family:"SFMono-Regular",Consolas,monospace; font-size:.75rem; }
.tool-btn svg { width:18px; height:18px; fill:none; stroke:currentColor; stroke-width:2; stroke-linecap:round; stroke-linejoin:round; }
.app-menu { position:relative; flex:0 0 auto; }
.app-menu summary { list-style:none; border:1px solid var(--border); border-radius:6px; background:var(--pane-bg); color:var(--fg); cursor:pointer; font-size:.85rem; padding:.35rem .6rem; }
.app-menu summary::-webkit-details-marker { display:none; }
.app-menu[open] summary { border-color:var(--accent); background:var(--accent-soft); }
.app-menu .file-toolbar { position:absolute; z-index:22; top:calc(100% + .4rem); right:0; border:1px solid var(--border); border-radius:8px; background:var(--pane-bg); box-shadow:0 12px 28px rgba(15,23,42,.18); }
.autosave-toggle { position:relative; inline-size:92px; block-size:30px; display:inline-flex; align-items:center; justify-content:space-between; padding:0 8px; overflow:hidden; border:1px solid var(--border); border-radius:999px; background:var(--pane-bg); color:var(--accent); font:inherit; font-size:.64rem; font-weight:650; letter-spacing:.01em; cursor:pointer; transition:border-color .2s ease, background .2s ease; }
.autosave-toggle::after { content:""; position:absolute; inset:2px auto 2px 2px; inline-size:42px; border-radius:999px; background:var(--bg); box-shadow:0 2px 6px rgba(15,23,42,.15); transform:translateX(0); transition:transform .2s ease; }
.autosave-toggle[aria-pressed="true"]::after { transform:translateX(46px); }
.autosave-toggle__local, .autosave-toggle__disk { position:relative; z-index:1; inline-size:38px; text-align:center; transition:opacity .2s ease; pointer-events:none; }
.autosave-toggle[aria-pressed="true"] .autosave-toggle__local, .autosave-toggle[aria-pressed="false"] .autosave-toggle__disk { opacity:.38; }
.autosave-toggle:hover:not(:disabled), .autosave-toggle:focus-visible { border-color:var(--accent); outline:none; background:var(--accent-soft); }
.autosave-toggle:active:not(:disabled) { background:var(--pane-bg); }
.autosave-toggle:disabled { cursor:not-allowed; }
.autosave-toggle[hidden] { display:none; }
.autosave-toggle.is-unavailable { opacity:.55; cursor:not-allowed; }
.view-toggle { display:flex; gap:.25rem; padding:.2rem; background:var(--bg); border:1px solid var(--border); border-radius:8px; }
.view-toggle button { border:0; background:transparent; color:var(--fg); padding:.32rem .55rem; border-radius:5px; cursor:pointer; font-size:.8rem; }
.view-toggle button[aria-pressed="true"] { background:var(--pane-bg); color:var(--accent); box-shadow:0 1px 2px rgba(15,23,42,.12); }
.workspace-center { display:flex; flex:1 1 auto; min-width:0; min-height:0; flex-direction:column; }
.workspace-panes { display:flex; flex:1 1 auto; min-height:0; min-width:0; }
.workspace-tabs { display:flex; min-height:34px; overflow:auto; border-bottom:1px solid var(--border); background:var(--header-bg); }
.workspace-tab-group { display:flex; align-items:center; border-right:1px solid var(--border); }
.workspace-tab { display:flex; align-items:center; gap:.4rem; max-width:210px; padding:.45rem .55rem; border:0; border-right:1px solid var(--border); background:transparent; color:var(--fg); cursor:pointer; white-space:nowrap; overflow:hidden; }
.workspace-tab-group .workspace-tab { border-right:0; }
.workspace-tab[aria-selected="true"] { background:var(--pane-bg); box-shadow:inset 0 2px 0 var(--accent); }
.workspace-tab__label { overflow:hidden; text-overflow:ellipsis; }
.workspace-tab__close { border:0; background:transparent; color:inherit; font-size:1rem; line-height:1; cursor:pointer; border-radius:3px; }
.workspace-tab__close:hover { background:var(--accent-soft); }
.save-status { color:color-mix(in srgb, var(--fg) 62%, transparent); font-size:.78rem; white-space:nowrap; }
.save-status[data-state="error"] { color:#dc2626; }
.external-media-button { display:block; margin:.75rem 0; padding:.55rem .7rem; border:1px solid var(--border); border-radius:6px; background:var(--accent-soft); color:var(--fg); cursor:pointer; font:inherit; }
.external-media-button:hover, .external-media-button:focus-visible { border-color:var(--accent); }
.context-sidebar { flex:0 0 260px; min-width:180px; border-left:1px solid var(--border); background:var(--pane-bg); overflow:auto; }
.context-sidebar__tabs { display:flex; align-items:center; border-bottom:1px solid var(--border); }
.context-sidebar__tabs button { border:0; border-bottom:2px solid transparent; background:transparent; color:var(--fg); padding:.6rem .45rem; cursor:pointer; font:inherit; font-size:.8rem; }
.context-sidebar__tabs button[aria-selected="true"] { border-color:var(--accent); color:var(--accent); }
.context-sidebar__tabs .context-sidebar__toggle { margin-left:auto; font-size:1.1rem; }
.context-sidebar__rail-label { display:none; }
.context-panel__content { padding:.65rem; }
.context-empty { color:color-mix(in srgb, var(--fg) 55%, transparent); font-size:.85rem; }
.outline-item, .backlink-item { display:block; width:100%; border:0; background:transparent; color:var(--fg); text-align:left; padding:.35rem; border-radius:4px; cursor:pointer; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.outline-item:hover, .backlink-item:hover { background:var(--accent-soft); }
.backlink-item small { display:block; opacity:.7; overflow:hidden; text-overflow:ellipsis; }
.graph-toolbar { display:flex; align-items:center; justify-content:space-between; gap:.4rem; margin-bottom:.55rem; font-size:.78rem; color:color-mix(in srgb, var(--fg) 65%, transparent); }
.graph-open-button { border:1px solid var(--border); border-radius:4px; background:var(--pane-bg); color:var(--accent); padding:.28rem .4rem; font:inherit; cursor:pointer; white-space:nowrap; }
.graph-open-button:hover { background:var(--accent-soft); border-color:var(--accent); }
.graph-svg { display:block; width:100%; height:100%; min-height:220px; border:1px solid var(--border); border-radius:8px; background:radial-gradient(circle at center, var(--accent-soft), transparent 70%); touch-action:none; cursor:grab; }
.graph-svg.is-panning { cursor:grabbing; }
.graph-svg--mini { height:240px; cursor:pointer; }
.graph-panel__hint { margin:.5rem .15rem; font-size:.74rem; line-height:1.4; color:color-mix(in srgb, var(--fg) 65%, transparent); }
.graph-node-group { cursor:pointer; outline:none; }
.graph-hit { fill:transparent; }
.graph-node { fill:var(--accent); stroke:var(--pane-bg); stroke-width:2px; vector-effect:non-scaling-stroke; }
.graph-node--active { fill:#e18b34; }
.graph-node--orphan { fill:color-mix(in srgb, var(--fg) 48%, var(--pane-bg)); }
.graph-node-group.is-selected .graph-node, .graph-node-group:focus-visible .graph-node { stroke:#f59e0b; stroke-width:4px; }
.graph-node-group.is-neighbor .graph-node, .graph-node-group:hover .graph-node { fill:#34b6d9; }
.graph-node-group.is-dimmed { opacity:.16; }
.graph-edge { stroke:color-mix(in srgb, var(--accent) 48%, var(--border)); stroke-width:1.5; stroke-linecap:round; vector-effect:non-scaling-stroke; pointer-events:none; }
.graph-edge.is-dimmed { opacity:.12; }
.graph-edge.is-emphasized { stroke:var(--accent); stroke-width:2.5; }
.graph-label { display:none; fill:var(--fg); font-weight:600; pointer-events:none; paint-order:stroke; stroke:var(--pane-bg); stroke-width:4px; stroke-linejoin:round; }
.graph-label.is-visible { display:inline; }
.graph-modal { position:fixed; inset:0; z-index:40; display:grid; place-items:center; padding:clamp(1rem,5vh,3rem); }
.graph-modal[hidden] { display:none; }
.graph-modal__backdrop { position:absolute; inset:0; background:rgba(8, 15, 28, .62); backdrop-filter:blur(3px); }
.graph-modal__dialog { position:relative; display:flex; flex-direction:column; width:min(1200px, 100%); height:min(850px, 100%); border:1px solid var(--border); border-radius:12px; overflow:hidden; background:var(--pane-bg); box-shadow:0 24px 70px rgba(0,0,0,.38); }
.graph-modal__dialog header { display:flex; align-items:flex-start; justify-content:space-between; padding:1rem 1.2rem; border-bottom:1px solid var(--border); }
.graph-modal__dialog h2 { margin:0; font-size:1.1rem; }
.graph-modal__dialog p { margin:.2rem 0 0; color:color-mix(in srgb, var(--fg) 65%, transparent); font-size:.85rem; }
.graph-modal__dialog header button { border:0; background:transparent; color:var(--fg); font-size:1.5rem; line-height:1; cursor:pointer; }
.graph-controls { display:flex; align-items:center; flex-wrap:wrap; gap:.55rem 1rem; padding:.65rem 1rem; border-bottom:1px solid var(--border); font-size:.8rem; }
.graph-controls input[type="search"] { flex:1 1 180px; min-width:140px; padding:.45rem .6rem; border:1px solid var(--border); border-radius:6px; background:var(--pane-bg); color:var(--fg); font:inherit; }
.graph-controls label { display:flex; align-items:center; gap:.3rem; white-space:nowrap; cursor:pointer; }
.graph-controls__zoom { display:flex; margin-left:auto; gap:.25rem; }
.graph-controls__zoom button, .graph-modal__footer button { border:1px solid var(--border); border-radius:5px; padding:.4rem .6rem; background:var(--pane-bg); color:var(--fg); font:inherit; cursor:pointer; white-space:nowrap; }
.graph-controls__zoom button:hover, .graph-modal__footer button:hover:not(:disabled) { border-color:var(--accent); color:var(--accent); }
.graph-modal__footer button:disabled { opacity:.5; cursor:default; }
.graph-modal__canvas { flex:1; min-height:0; padding:.6rem; }
.graph-modal__canvas .graph-svg { height:100%; min-height:0; }
.graph-modal__footer { display:flex; align-items:center; justify-content:space-between; gap:1rem; min-height:54px; padding:.6rem 1rem; border-top:1px solid var(--border); font-size:.8rem; color:color-mix(in srgb, var(--fg) 75%, transparent); }
.graph-modal__footer div { overflow:hidden; white-space:nowrap; text-overflow:ellipsis; }
.graph-empty { margin:2rem auto; max-width:30rem; text-align:center; color:color-mix(in srgb, var(--fg) 70%, transparent); }
.app-main.context-collapsed .context-sidebar { flex:0 0 42px; min-width:42px; max-width:42px; overflow:hidden; }
.app-main.context-collapsed .context-sidebar__tabs { position:relative; display:block; height:44px; border-bottom:0; }
.app-main.context-collapsed .context-sidebar__tabs button:not(.context-sidebar__toggle), .app-main.context-collapsed .context-panel { display:none; }
.app-main.context-collapsed .context-sidebar__toggle {
  position:absolute;
  top:8px;
  right:6px;
  width:28px;
  height:28px;
  margin:0;
  padding:0;
  border:1px solid var(--border);
  border-radius:0;
  background:var(--pane-bg);
  color:var(--fg);
  line-height:1;
}
.app-main.context-collapsed .context-sidebar__rail-label {
  display:block;
  width:max-content;
  margin:0 auto;
  color:var(--fg);
  font-size:.68rem;
  letter-spacing:0;
  text-transform:uppercase;
  writing-mode:vertical-rl;
}
.workspace-modal { position:fixed; inset:0; z-index:30; display:grid; place-items:start center; padding-top:12vh; }
.about-modal { position:fixed; inset:0; z-index:50; display:grid; place-items:center; padding:1rem; }
.about-modal[hidden] { display:none; }
.about-modal__backdrop { position:absolute; inset:0; background:rgba(15,23,42,.55); }
.about-modal__dialog { position:relative; display:flex; flex-direction:column; width:min(680px,100%); max-height:min(760px,90vh); overflow:hidden; border:1px solid var(--border); border-radius:12px; background:var(--pane-bg); box-shadow:0 20px 50px rgba(0,0,0,.3); }
.about-modal__dialog header { display:flex; align-items:center; justify-content:space-between; padding:.8rem 1rem; border-bottom:1px solid var(--border); }
.about-modal__dialog h2 { margin:0; font-size:1rem; }
.about-modal__dialog header button { border:0; background:transparent; color:var(--fg); font-size:1.5rem; line-height:1; cursor:pointer; }
.about-modal__content { overflow-y:auto; }
.workspace-modal[hidden] { display:none; }
.workspace-modal__backdrop { position:absolute; inset:0; background:rgba(15,23,42,.42); }
.workspace-modal__dialog { position:relative; width:min(620px,calc(100% - 2rem)); max-height:70vh; overflow:hidden; border:1px solid var(--border); border-radius:9px; background:var(--pane-bg); box-shadow:0 20px 45px rgba(0,0,0,.25); }
.workspace-modal__dialog header { display:flex; align-items:center; justify-content:space-between; padding:.65rem .8rem; border-bottom:1px solid var(--border); }
.workspace-modal__dialog h2 { margin:0; font-size:1rem; }
.workspace-modal__dialog header button { border:0; background:transparent; color:var(--fg); font-size:1.3rem; cursor:pointer; }
#workspace-query { width:calc(100% - 1.2rem); margin:.6rem; padding:.55rem .65rem; border:1px solid var(--border); border-radius:5px; background:var(--pane-bg); color:var(--fg); }
.workspace-results { max-height:calc(70vh - 100px); overflow:auto; padding:.2rem .4rem .6rem; }
.workspace-result { width:100%; display:block; border:0; background:transparent; color:var(--fg); text-align:left; padding:.55rem; border-radius:5px; cursor:pointer; }
.workspace-result:hover, .workspace-result.is-active { background:var(--accent-soft); }
.workspace-result small { display:block; opacity:.7; margin-top:.15rem; }
@media (max-width: 960px) { .context-sidebar { display:none; } .workspace-tabs { min-height:32px; } }

.file-explorer {
  flex: 0 0 var(--explorer-width);
  min-width: 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--bg);
  border-right: 1px solid var(--border);
  font-size: 0.85rem;
}

.file-explorer__header {
  position: sticky;
  top: 0;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0.75rem;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  text-transform: uppercase;
  font-size: 0.68rem;
  padding-right: 2.5rem;
}

.file-explorer__toggle {
  position: absolute;
  top: 0.55rem;
  right: 0.45rem;
  width: 28px;
  height: 28px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--fg);
  font-size: 1.3rem;
  line-height: 1;
  cursor: pointer;
}

.file-explorer__new-file {
  position:absolute;
  top:.55rem;
  right:2.45rem;
  width:28px;
  height:28px;
  border:1px solid transparent;
  border-radius:5px;
  background:transparent;
  color:var(--fg);
  font-size:1.2rem;
  line-height:1;
  cursor:pointer;
}
.file-explorer__new-file:hover:not(:disabled),
.file-explorer__new-file:focus:not(:disabled) { outline:none; border-color:var(--accent); background:var(--accent-soft); }
.file-explorer__new-file:disabled { cursor:not-allowed; opacity:.4; }

.file-explorer__toggle:hover,
.file-explorer__toggle:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--accent-soft);
}

.file-explorer__rail-label {
  display: none;
}

.file-explorer__name {
  overflow: hidden;
  color: var(--fg);
  font-size: 0.78rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-explorer__tree {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: 0.35rem 0;
}

.file-explorer__footer {
  flex: none;
  padding: 0.7rem 0.55rem;
  border-top: 1px solid var(--border);
  color: var(--fg);
  font-size: 0.68rem;
  text-align: center;
}

.file-explorer__about {
  border: 0;
  padding: 0;
  background: transparent;
  color: var(--accent);
  font: inherit;
  text-decoration: underline;
  cursor: pointer;
}

.file-explorer__empty {
  padding: 1rem 0.75rem;
  color: rgba(87, 96, 106, 0.9);
  line-height: 1.45;
}

.file-explorer__empty-message {
  margin: 0 0 0.75rem;
}

.file-explorer__open-folder,
.file-explorer__reconnect {
  color: var(--fg);
}

.file-tree,
.file-tree ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.file-tree ul {
  padding-left: 0.8rem;
}

.file-tree summary,
.file-tree button {
  width: 100%;
  min-height: 28px;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--fg);
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.file-tree summary {
  padding: 0.35rem 0.5rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-tree button {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.35rem 0.5rem 0.35rem 1.45rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-tree button::before {
  content: "M";
  flex: 0 0 auto;
  color: var(--accent);
  font-size: 0.68rem;
  font-weight: 700;
}

.file-tree summary:hover,
.file-tree summary:focus,
.file-tree button:hover,
.file-tree button:focus {
  outline: none;
  background: var(--accent-soft);
}

.file-tree button.is-active,
.file-tree summary.is-active {
  background: var(--accent-soft);
  box-shadow: inset 3px 0 0 var(--accent);
}

.explorer-divider {
  position: relative;
  z-index: 2;
  flex: 0 0 5px;
  margin-right: -5px;
  cursor: col-resize;
  transform: translateX(-2px);
}

.explorer-divider::after {
  content: "";
  position: absolute;
  inset: 0 2px;
  background: var(--accent);
  opacity: 0;
  transition: opacity 0.15s ease;
}

.explorer-divider:hover::after,
.explorer-divider:focus::after,
.explorer-divider.dragging::after {
  opacity: 1;
}

.app-main.explorer-collapsed .explorer-divider {
  display: none;
}

.app-main.explorer-collapsed .file-explorer {
  flex-basis: 42px;
  overflow: hidden;
}

.app-main.explorer-collapsed .file-explorer__header {
  position: relative;
  height: 44px;
  padding: 0;
  border-bottom: 0;
}

.app-main.explorer-collapsed .file-explorer__header > span,
.app-main.explorer-collapsed .file-explorer__name,
.app-main.explorer-collapsed .file-explorer__tree,
.app-main.explorer-collapsed .file-explorer__empty {
  display: none;
}

.app-main.explorer-collapsed .file-explorer__footer {
  display: none;
}

.app-main.explorer-collapsed .file-explorer__toggle {
  top: 8px;
  right: 6px;
  border-color: var(--border);
  background: var(--pane-bg);
}

.app-main.explorer-collapsed .file-explorer__new-file {
  display: none;
}

.app-main.explorer-collapsed .file-explorer__rail-label {
  display: block;
  width: max-content;
  margin: 0 auto;
  color: var(--fg);
  font-size: 0.68rem;
  letter-spacing: 0;
  text-transform: uppercase;
  writing-mode: vertical-rl;
}

body.resizing-explorer {
  cursor: col-resize;
  user-select: none;
}

.pane {
  background: var(--pane-bg);
  padding: 0;
  overflow: hidden;
  display: flex;
  flex: 1 1 50%;
  min-width: 0;
}

.editor-pane {
  position: relative;
}

.editor-syntax,
.editor-pane textarea {
  border: none;
  background: transparent;
  color: transparent;
  caret-color: var(--editor-fg, var(--fg));
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.82rem;
  padding: 1rem;
  width: 100%;
  margin: 0;
  padding: 8px 12px;
  border: 0;
  font-family: Menlo, Monaco, "Courier New", monospace;
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0;
  line-height: 20px;
  tab-size: 4;
  white-space: pre-wrap;
  overflow-wrap: break-word;
}

.editor-syntax {
  z-index: 0;
  overflow: hidden;
  color: var(--editor-fg);
  pointer-events: none;
}

.editor-syntax code {
  display: block;
  font: inherit;
}

.editor-pane textarea {
  background: transparent;
  color: transparent;
  -webkit-text-fill-color: transparent;
  caret-color: var(--editor-fg);
  z-index: 1;
  resize: none;
  outline: none;
  overflow: auto;
}

.editor-pane { position:relative; }
.editor-syntax,
.editor-pane textarea {
  font-family:"SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size:.82rem;
  line-height:1.55;
  padding:1rem;
}
.editor-syntax {
  position:absolute;
  inset:0;
  z-index:0;
  margin:0;
  overflow:hidden;
  pointer-events:none;
  white-space:pre-wrap;
  overflow-wrap:break-word;
  color:var(--editor-fg, var(--fg));
}
.editor-syntax code { display:block; min-height:100%; font:inherit; color:inherit; }
.editor-pane textarea { position:relative; z-index:1; }
.editor-pane textarea::selection { background:var(--accent-soft); color:transparent; }
.syntax-marker { color:var(--syntax-markup, #af00db); }
.syntax-heading { color:var(--syntax-heading, #0451a5); font-weight:700; }
.syntax-list-marker { color:var(--accent); font-weight:700; }
.syntax-link { color:var(--syntax-link, #0070c1); }
.syntax-code, .syntax-code-block { color:var(--syntax-code, #a31515); }
.syntax-comment { color:var(--syntax-comment, #008000); }
.syntax-strong { font-weight:700; }
.syntax-emphasis { font-style:italic; }
.syntax-highlight { color:var(--syntax-highlight, #795e26); background:rgba(255, 214, 10, .2); }

.preview-pane {
  overflow: auto;
}

.markdown-body {
  width: 100%;
  padding: 1.5rem;
  color: inherit;
  /* Keep the rendered document at its established reading size. The source
     editor alone uses the compact size requested for Markdown editing. */
  font-size: 0.97rem;
  line-height: 1.65;
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4,
.markdown-body h5,
.markdown-body h6 {
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.3em;
  margin: 1.5em 0 0.8em;
}

/* The document padding already provides breathing room at the top. Avoid
   stacking it with the normal section spacing on the opening block. */
.markdown-body > :first-child {
  margin-top: 0;
}

.markdown-body h1 {
  font-size: 2rem;
}

.markdown-body h2 {
  font-size: 1.6rem;
}

.markdown-body h3 {
  font-size: 1.35rem;
}

.markdown-body h4 {
  font-size: 1.15rem;
}

.markdown-body h5 {
  font-size: 1.05rem;
}

.markdown-body h6 {
  font-size: 1rem;
}

.markdown-body pre,
.markdown-body code {
  background: var(--code-bg);
  color: var(--code-fg);
  border-radius: 6px;
}

.markdown-body pre {
  padding: 1rem;
  overflow: auto;
}

.markdown-body pre code {
  background: transparent;
  color: inherit;
  font-size: 0.95em;
}

.markdown-body pre code.hljs {
  background: transparent;
  color: inherit;
}

[data-theme="dark"] .markdown-body pre code.hljs {
  color: #e6edf3;
}

.markdown-body mark {
  background: #fff2a8;
  color: inherit;
  padding: 0 0.2em;
  border-radius: 0.2em;
}

[data-theme="dark"] .markdown-body mark {
  background: rgba(255, 214, 10, 0.35);
}

.markdown-body table {
  border-collapse: collapse;
  width: 100%;
  margin: 1rem 0;
}

.markdown-body .mermaid {
  width: 100%;
}

.markdown-body .mermaid svg {
  max-width: 100%;
}

.markdown-body th,
.markdown-body td {
  border: 1px solid var(--border);
  padding: 0.5rem;
}

.markdown-body blockquote {
  border-left: 4px solid var(--border);
  padding: 0.5rem 1rem;
  color: rgba(87, 96, 106, 0.9);
  margin: 1rem;
}

.divider {
  flex: 0 0 6px;
  cursor: col-resize;
  background: var(--border);
  position: relative;
}

.divider::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 2px;
  height: 32px;
  background: var(--accent);
  opacity: 0;
  border-radius: 2px;
  transition: opacity 0.2s ease;
}

.divider:hover::after,
.divider:focus::after,
.divider.dragging::after {
  opacity: 1;
}

.view-toggle {
  display: flex;
  gap: 0.25rem;
  padding: 0.2rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.view-toggle button {
  border: 0;
  background: transparent;
  color: var(--fg);
  padding: 0.32rem 0.55rem;
  border-radius: 5px;
  cursor: pointer;
  font-size: 0.8rem;
}

.view-toggle button[aria-pressed="true"] {
  background: var(--pane-bg);
  color: var(--accent);
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.12);
}

.app-main.wysiwyg-mode .editor-pane,
.app-main.wysiwyg-mode .divider { display: none; }

.app-main.wysiwyg-mode .preview-pane {
  flex: 1 1 auto;
  position: relative;
}

.app-main.wysiwyg-mode #preview {
  min-height: calc(100vh - 150px);
  outline: none;
  caret-color: var(--accent);
}

.app-main.wysiwyg-mode #preview:focus {
  box-shadow: inset 3px 0 0 var(--accent-soft);
}

.app-main.markdown-only .preview-pane,
.app-main.markdown-only .divider { display: none; }

.app-main.markdown-only .editor-pane { flex: 1 1 auto; }

.app-main.show-preview .editor-pane,
.app-main.show-preview .divider { display: none; }

.app-main.show-preview .preview-pane { flex: 1 1 auto; }

.toast {
  position: fixed;
  bottom: 1rem;
  right: 1rem;
  padding: 0.75rem 1rem;
  background: var(--pane-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
  font-size: 0.9rem;
}

body.dragging #drop-zone {
  outline: 3px dashed var(--accent);
  outline-offset: -5px;
}

.draft-manager {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 20;
}

.draft-manager[hidden] {
  display: none;
}

.draft-manager__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.35);
}

.draft-manager__dialog {
  position: relative;
  width: min(420px, calc(100% - 2rem));
  background: var(--pane-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 20px 40px rgba(15, 23, 42, 0.18);
  display: flex;
  flex-direction: column;
  max-height: calc(100% - 4rem);
}

.draft-manager__header,
.draft-manager__footer {
  padding: 1rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.draft-manager__footer {
  border-bottom: none;
  border-top: 1px solid var(--border);
}

.draft-manager__content {
  padding: 0 1rem 1rem;
  overflow-y: auto;
}

.draft-manager__empty {
  margin: 1.5rem 0;
  text-align: center;
  color: var(--border);
}

.draft-manager__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.draft-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  width: 100%;
}

.draft-item__name {
  flex: 1;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--fg);
  padding: 0.35rem 0.5rem;
  border-radius: 4px;
  min-width: 0;
}

.draft-item__name:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--pane-bg);
}

.draft-item__actions {
  display: flex;
  gap: 0.35rem;
}

.draft-item__actions button {
  border: 1px solid var(--border);
  background: var(--pane-bg);
  color: var(--fg);
  padding: 0.3rem 0.5rem;
  font-size: 0.75rem;
  border-radius: 4px;
  cursor: pointer;
}

.draft-item__actions button:hover,
.draft-item__actions button:focus {
  outline: none;
  border-color: var(--accent);
}

.draft-item__meta {
  font-size: 0.75rem;
  color: var(--border);
  min-width: 80px;
  text-align: right;
}

.draft-item--active .draft-item__name {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.storage-indicator {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.85rem;
}

.storage-bar {
  width: 100%;
  height: 8px;
  background: rgba(148, 163, 184, 0.25);
  border-radius: 999px;
  overflow: hidden;
}

.storage-bar span {
  display: block;
  height: 100%;
  width: 0;
  background: #16a34a;
  transition: width 0.3s ease, background 0.3s ease;
}

.storage-indicator.storage-indicator--warn .storage-bar span {
  background: #f59e0b;
}

.storage-indicator.storage-indicator--danger .storage-bar span {
  background: #dc2626;
}

.storage-label {
  font-size: 0.8rem;
}

.responsive-toggle.view-toggle { display:flex; margin-left:0; align-self:auto; }
.app-main.markdown-only .preview-pane,
.app-main.markdown-only .divider { display:none; }
.app-main.markdown-only .editor-pane { flex:1 1 auto; }

@media (max-width: 960px) {
  .app-header {
    grid-template-columns: 1fr auto;
    align-items: stretch;
  }

  .header-groups {
    grid-column: 1 / -1;
    grid-row: 2;
    width: 100%;
  }

  .editor-toolbar,
  .file-toolbar {
    justify-content: flex-start;
    justify-self: flex-start;
  }

  .editor-toolbar {
    padding-right: 0;
  }

  .file-toolbar {
    border-left: none;
    padding-left: 0;
  }

  .view-toggle {
    grid-column: 1 / -1;
    grid-row: 3;
    justify-self: start;
    overflow-x: auto;
    max-width: 100%;
  }

  .theme-toggle {
    grid-column: 2;
    grid-row: 1;
  }

  .app-main {
    flex-direction: row;
  }

  .file-explorer {
    flex-basis: min(var(--explorer-width), 42vw);
  }

  .divider {
    display: none;
  }

  .preview-pane {
    display: none;
  }

  .app-main.show-preview .preview-pane {
    display: flex;
  }

}

/* Keep the wide desktop header compact, then give controls their own rows
   before a laptop-sized viewport can clip or hide formatting actions. */
.app-header { display:grid; grid-template-columns:auto minmax(0, 1fr) auto auto; align-items:center; gap:.6rem; padding:.6rem 1rem; }
.logo-title { min-width:0; gap:.55rem; }
.logo-title h1 { font-size:1.15rem; white-space:nowrap; }
.document-title-input { width:clamp(110px, 11vw, 180px); }
.save-status { inline-size:92px; font-size:.75rem; overflow:hidden; white-space:nowrap; }
.header-groups { min-width:0; flex-wrap:nowrap; justify-content:flex-end; }
.editor-toolbar { min-width:0; flex-wrap:nowrap; overflow-x:auto; }
.view-toggle { flex:0 0 auto; flex-wrap:nowrap; }

@media (max-width: 1800px) {
  .app-header {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas:
      "identity theme"
      "toolbar view";
    row-gap: .45rem;
  }

  .logo-title { grid-area: identity; }
  .header-groups { grid-area: toolbar; justify-content:flex-start; }
  .theme-toggle { grid-area: theme; }
  .view-toggle { grid-area: view; }

  /* A 13-inch laptop gets the entire formatting bar, rather than a clipped
     horizontal scroller. Groups wrap as whole, familiar clusters. */
  .editor-toolbar { flex:1 1 auto; flex-wrap:wrap; overflow:visible; }
}

@media (max-width: 1120px) and (min-width: 961px) {
  .app-header {
    grid-template-areas:
      "identity theme"
      "toolbar toolbar"
      "view view";
  }

  .view-toggle { justify-self:start; }
}

@media (max-width: 960px) {
  .app-header { display:flex; flex-wrap:wrap; padding:.45rem .75rem; }
  .header-groups { order:3; flex:1 1 100%; justify-content:flex-start; }
  .editor-toolbar { flex:1 1 auto; flex-wrap:wrap; overflow:visible; }
  .view-toggle { overflow:visible; max-width:none; flex-wrap:wrap; }
}

@media (max-width: 560px) {
  .logo-title { flex-wrap:wrap; }
  .save-status { display:none; }
  .toolbar-group { border-right:0; }
}

@media print {
  body {
    background: #fff;
    color: #000;
  }

  .app-header,
  .file-explorer,
  .explorer-divider,
  .divider,
  .editor-pane,
  .toast {
    display: none !important;
  }

  .app-main {
    display: block;
  }

  .preview-pane {
    display: block;
    overflow: visible;
  }

  .markdown-body {
    padding: 0;
  }
}