/* ---------------------------------------------------
   notes app
--------------------------------------------------- */

@import url('https://fonts.googleapis.com/css2?family=Space+Mono:wght@400;700&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root {
  --bg: #090c10;
  --bg-alt: #0d1219;
  --panel: #11161d;
  --fg: #c9d3dc;
  --fg-dim: #566270;
  --fg-dimmer: #313a45;
  --accent: #ffb400;
  --accent-soft: #ffb40022;
  --accent-2: #37d6a0;
  --danger: #ff3b5c;
  --border: #1c2530;
  --font-display: 'Space Mono', 'Courier New', monospace;
  --font-body: 'IBM Plex Mono', 'Courier New', monospace;
  --sidebar-w: 280px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
}

body {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  grid-template-rows: 48px 1fr;
  grid-template-areas:
    "topbar topbar"
    "sidebar main";
  height: 100vh;
  overflow: hidden;
}

header.topbar {
  grid-area: topbar;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 0 16px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-alt);
  font-size: 12.5px;
  color: var(--fg-dim);
  min-width: 0;
}
.topbar .brand {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--fg);
  font-size: 13px;
  letter-spacing: 0.02em;
  text-decoration: none;
  white-space: nowrap;
}
.topbar .brand:hover { color: var(--accent); }
.topbar .sep { color: var(--fg-dimmer); }
.topbar .breadcrumb {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--fg-dim);
}
.topbar .breadcrumb .current { color: var(--accent-2); }
.topbar-spacer { flex: 1; }
.topbar a.tool-link {
  color: var(--fg-dim);
  text-decoration: none;
  border: 1px solid var(--border);
  padding: 5px 10px;
  border-radius: 2px;
  white-space: nowrap;
  transition: color 0.15s ease, border-color 0.15s ease;
}
.topbar a.tool-link:hover { color: var(--accent); border-color: var(--accent); }
#sidebar-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 14px;
  padding: 5px 9px;
  border-radius: 2px;
  cursor: pointer;
}

nav.sidebar {
  grid-area: sidebar;
  background: var(--bg-alt);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  padding: 14px 10px 40px;
}
nav.sidebar::-webkit-scrollbar { width: 8px; }
nav.sidebar::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

.tree, .tree ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.tree ul {
  margin-left: 9px;
  padding-left: 10px;
  border-left: 1px dashed var(--border);
}
.tree li { margin: 1px 0; }

.tree .node-row {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 8px;
  border-radius: 2px;
  font-size: 12.5px;
  color: var(--fg);
  cursor: pointer;
  text-decoration: none;
  user-select: none;
  min-width: 0;
}
.tree .node-row:hover { background: var(--accent-soft); color: var(--accent); }

.tree .folder-toggle {
  display: inline-block;
  width: 10px;
  flex-shrink: 0;
  color: var(--fg-dimmer);
  transition: transform 0.15s ease;
  font-size: 9px;
}
.tree li.expanded > .node-row .folder-toggle { transform: rotate(90deg); }
.tree li:not(.expanded) > ul { display: none; }

.tree .folder-name { color: var(--fg-dim); font-weight: 600; }
.tree li.expanded > .node-row .folder-name { color: var(--fg); }

.tree .file-icon {
  flex-shrink: 0;
  color: var(--fg-dimmer);
  font-size: 11px;
}
.tree a.node-row.active {
  background: var(--accent-soft);
  color: var(--accent);
}
.tree a.node-row.active .file-icon { color: var(--accent); }
.tree .file-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sidebar-empty {
  color: var(--fg-dimmer);
  font-size: 12px;
  padding: 10px 8px;
  line-height: 1.6;
}

main.content {
  grid-area: main;
  overflow-y: auto;
  padding: 40px 48px 80px;
}
main.content::-webkit-scrollbar { width: 10px; }
main.content::-webkit-scrollbar-thumb { background: var(--border); border-radius: 5px; }

.article-shell {
  max-width: 720px;
  margin: 0 auto;
}

.empty-state {
  max-width: 520px;
  margin: 12vh auto 0;
  text-align: center;
  color: var(--fg-dim);
}
.empty-state .glyph {
  font-family: var(--font-display);
  font-size: 34px;
  color: var(--fg-dimmer);
  margin-bottom: 14px;
}
.empty-state h1 {
  font-family: var(--font-display);
  font-size: 18px;
  color: var(--fg);
  margin: 0 0 8px;
}
.empty-state p { font-size: 13px; line-height: 1.7; margin: 0; }

.load-error {
  max-width: 560px;
  margin: 10vh auto 0;
  border: 1px solid var(--danger);
  background: #ff3b5c11;
  padding: 18px 20px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--fg);
}
.load-error .title { color: var(--danger); font-weight: 600; margin-bottom: 6px; }
.load-error code {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  padding: 1px 5px;
  border-radius: 2px;
}

.md-content { font-size: 14.5px; line-height: 1.75; color: var(--fg); }
.md-content h1, .md-content h2, .md-content h3, .md-content h4 {
  font-family: var(--font-display);
  color: var(--fg);
  line-height: 1.35;
  margin: 1.6em 0 0.6em;
}
.md-content h1 { font-size: 24px; margin-top: 0; }
.md-content h2 { font-size: 19px; border-bottom: 1px solid var(--border); padding-bottom: 6px; }
.md-content h3 { font-size: 15.5px; color: var(--accent-2); }
.md-content p { margin: 0 0 1.1em; }
.md-content a { color: var(--accent); text-decoration: none; border-bottom: 1px dashed var(--accent); }
.md-content a:hover { border-bottom-style: solid; }
.md-content ul, .md-content ol { margin: 0 0 1.1em; padding-left: 1.4em; }
.md-content li { margin: 0.3em 0; }
.md-content blockquote {
  margin: 1.2em 0;
  padding: 4px 16px;
  border-left: 3px solid var(--accent);
  color: var(--fg-dim);
  background: var(--bg-alt);
}
.md-content code {
  font-family: var(--font-body);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  padding: 1px 5px;
  border-radius: 2px;
  font-size: 0.92em;
  color: var(--accent-2);
}
.md-content pre {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  padding: 14px 16px;
  overflow-x: auto;
  border-radius: 2px;
  margin: 1.2em 0;
}
.md-content pre code {
  background: none;
  border: none;
  padding: 0;
  color: var(--fg);
}
.md-content img { max-width: 100%; border: 1px solid var(--border); }
.md-content table { border-collapse: collapse; width: 100%; margin: 1.2em 0; font-size: 0.92em; }
.md-content th, .md-content td {
  border: 1px solid var(--border);
  padding: 7px 10px;
  text-align: left;
}
.md-content th { color: var(--accent-2); font-family: var(--font-display); font-weight: 700; }
.md-content hr { border: none; border-top: 1px dashed var(--border); margin: 2em 0; }

.article-meta {
  font-size: 11px;
  color: var(--fg-dimmer);
  margin-bottom: 6px;
  letter-spacing: 0.03em;
}

body.editor-body {
  grid-template-columns: 1fr;
  grid-template-areas:
    "topbar"
    "editor";
}
.editor-wrap {
  grid-area: editor;
  display: grid;
  grid-template-columns: 1fr 1fr;
  overflow: hidden;
}
.editor-pane, .preview-pane { display: flex; flex-direction: column; min-width: 0; }
.editor-pane { border-right: 1px solid var(--border); }
.pane-label {
  font-size: 11px;
  color: var(--fg-dim);
  padding: 8px 14px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-alt);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}
#md-source {
  flex: 1;
  resize: none;
  border: none;
  outline: none;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.7;
  padding: 16px 18px;
}
.preview-pane .md-content-wrap {
  flex: 1;
  overflow-y: auto;
  padding: 20px 26px 60px;
}
.editor-toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 16px;
}
.editor-toolbar input[type="text"] {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 12.5px;
  padding: 6px 9px;
  border-radius: 2px;
  width: 200px;
}
.editor-toolbar button, .editor-toolbar label.file-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--fg-dim);
  font-family: var(--font-body);
  font-size: 12px;
  padding: 6px 11px;
  border-radius: 2px;
  cursor: pointer;
  white-space: nowrap;
}
.editor-toolbar button:hover, .editor-toolbar label.file-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
}
.editor-toolbar button.primary {
  color: var(--bg);
  background: var(--accent);
  border-color: var(--accent);
  font-weight: 600;
}
.editor-toolbar button.primary:hover { background: var(--accent-2); border-color: var(--accent-2); color: var(--bg); }
.editor-toolbar input[type="file"] { display: none; }
.autosave-note {
  font-size: 10.5px;
  color: var(--fg-dimmer);
  padding: 6px 14px 0;
}

@media (max-width: 860px) {
  body { grid-template-columns: 1fr; }
  nav.sidebar {
    position: fixed;
    top: 48px;
    left: 0;
    bottom: 0;
    width: min(82vw, 320px);
    z-index: 20;
    transform: translateX(-100%);
    transition: transform 0.2s ease;
    box-shadow: 12px 0 30px -12px rgba(0,0,0,0.6);
  }
  body.sidebar-open nav.sidebar { transform: translateX(0); }
  main.content { padding: 28px 20px 60px; }
  #sidebar-toggle { display: inline-block; }
  .editor-wrap { grid-template-columns: 1fr; grid-template-rows: 1fr 1fr; }
  .editor-pane { border-right: none; border-bottom: 1px solid var(--border); }
  .editor-toolbar input[type="text"] { width: 120px; }
}

@media (prefers-reduced-motion: reduce) {
  nav.sidebar, .tree .folder-toggle { transition: none; }
}