:root {
  color-scheme: dark;
  --color-canvas-default: #0d1117;
  --color-canvas-subtle: #161b22;
  --color-canvas-inset: #010409;
  --color-border-default: #30363d;
  --color-border-muted: #21262d;
  --color-fg-default: #e6edf3;
  --color-fg-muted: #7d8590;
  --color-fg-subtle: #6e7681;
  --color-accent-fg: #58a6ff;
  --color-accent-emphasis: #1f6feb;
  --color-danger-fg: #f85149;
}

* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
  margin: 0;
}

body {
  background: var(--color-canvas-default);
  color: var(--color-fg-default);
  font: 14px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track { background: var(--color-canvas-subtle); }
::-webkit-scrollbar-thumb { background: var(--color-border-default); border-radius: 4px; }

a {
  color: inherit;
  text-decoration: none;
}

#app {
  display: flex;
  height: 100vh;
}

/* ---- Sidebar ---- */

.sidebar {
  display: flex;
  flex-direction: column;
  width: 288px;
  flex-shrink: 0;
  height: 100vh;
  border-right: 1px solid var(--color-border-default);
  background: var(--color-canvas-inset);
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 16px 16px 12px;
  color: var(--color-accent-fg);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.sidebar-search {
  padding: 0 12px 12px;
  position: relative;
}
.sidebar-search svg {
  position: absolute;
  left: 22px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-fg-subtle);
  pointer-events: none;
}
.sidebar-search input {
  padding-left: 32px;
}

.sidebar-new {
  padding: 0 12px 12px;
}
.sidebar-new a {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 0 12px 16px;
}

.sidebar-group {
  margin-bottom: 12px;
}
.sidebar-group-label {
  padding: 0 4px 4px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-accent-fg);
}
.sidebar-empty {
  padding: 8px 4px;
  font-size: 12px;
  color: var(--color-fg-subtle);
}

.sidebar-link {
  display: block;
  padding: 6px 8px;
  border-radius: 6px;
  font-size: 14px;
  color: var(--color-fg-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sidebar-link:hover {
  background: var(--color-canvas-subtle);
  color: var(--color-fg-default);
}
.sidebar-link.active {
  background: var(--color-canvas-subtle);
  color: var(--color-fg-default);
  font-weight: 500;
}

/* ---- Main content ---- */

.main {
  flex: 1;
  overflow-y: auto;
  padding: 32px;
}

.page {
  max-width: 768px;
  margin: 0 auto;
}

/* ---- Empty state ---- */

.empty-state {
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-align: center;
}
.empty-state svg {
  color: var(--color-accent-fg);
  margin-bottom: 8px;
}
.empty-state h1 {
  font-size: 18px;
  font-weight: 700;
  margin: 0;
}
.empty-state p {
  margin: 0;
  font-size: 14px;
  color: var(--color-fg-muted);
}

/* ---- Article view ---- */

.article-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}
.article-category {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-accent-fg);
}
.article-title {
  font-size: 24px;
  font-weight: 700;
  margin: 2px 0 0;
}
.article-byline {
  margin: 4px 0 0;
  font-size: 12px;
  color: var(--color-fg-subtle);
}
.article-divider {
  border: none;
  border-top: 1px solid var(--color-border-default);
  margin: 0 0 24px;
}

/* Rendered markdown body */
.prose h1, .prose h2, .prose h3, .prose h4 { font-weight: 700; margin: 1.4em 0 0.5em; }
.prose h1 { font-size: 22px; }
.prose h2 { font-size: 19px; }
.prose h3 { font-size: 16px; }
.prose p { margin: 0 0 1em; }
.prose ul, .prose ol { margin: 0 0 1em; padding-left: 1.5em; }
.prose li { margin: 0.25em 0; }
.prose a { color: var(--color-accent-fg); text-decoration: underline; }
.prose strong { font-weight: 700; }
.prose code { background: var(--color-canvas-subtle); border-radius: 4px; padding: 0.1em 0.4em; font-family: SFMono-Regular, Consolas, Menlo, monospace; font-size: 0.9em; }
.prose pre { background: var(--color-canvas-subtle); border: 1px solid var(--color-border-default); border-radius: 6px; padding: 12px; overflow-x: auto; margin: 0 0 1em; }
.prose pre code { background: none; padding: 0; }
.prose blockquote { border-left: 3px solid var(--color-accent-emphasis); color: var(--color-fg-muted); margin: 0 0 1em; padding-left: 1em; }
.prose table { border-collapse: collapse; width: 100%; margin: 0 0 1em; }
.prose th, .prose td { border: 1px solid var(--color-border-default); padding: 6px 10px; text-align: left; }
.prose th { color: var(--color-fg-muted); }
.prose hr { border: none; border-top: 1px solid var(--color-border-default); margin: 1.5em 0; }
.prose input[type="checkbox"] { margin-right: 0.4em; }

/* ---- Forms / buttons ---- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  background: none;
  color: inherit;
}
.btn-primary {
  background: var(--color-accent-emphasis);
  color: #fff;
}
.btn-primary:hover { filter: brightness(1.1); }
.btn-primary:disabled { opacity: 0.6; cursor: default; }
.btn-secondary {
  background: var(--color-canvas-subtle);
  border-color: var(--color-border-default);
}
.btn-secondary:hover { background: var(--color-border-default); }

.input {
  display: block;
  width: 100%;
  padding: 6px 12px;
  background: var(--color-canvas-default);
  border: 1px solid var(--color-border-default);
  border-radius: 6px;
  font-size: 14px;
  color: var(--color-fg-default);
  font-family: inherit;
}
.input::placeholder { color: var(--color-fg-subtle); }
.input:focus {
  outline: none;
  border-color: var(--color-accent-emphasis);
  box-shadow: 0 0 0 2px var(--color-accent-emphasis) inset;
}

.error-text { color: var(--color-danger-fg); font-size: 14px; margin: 0 0 12px; }

/* ---- Password gate / prompt ---- */

.password-gate {
  max-width: 360px;
  margin: 64px auto 0;
  text-align: center;
}
.password-gate svg { color: var(--color-accent-fg); margin-bottom: 8px; }
.password-gate h2 { font-size: 18px; font-weight: 700; margin: 0 0 4px; }
.password-gate p { margin: 0 0 16px; font-size: 14px; color: var(--color-fg-muted); }
.password-form { display: flex; flex-direction: column; gap: 12px; }

.reauth-box {
  max-width: 360px;
  border: 1px solid var(--color-border-default);
  background: var(--color-canvas-subtle);
  border-radius: 6px;
  padding: 12px;
  margin-bottom: 12px;
}

/* ---- Editor ---- */

.editor {
  display: flex;
  flex-direction: column;
  height: 100%;
}
.editor-fields {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 12px;
  margin-bottom: 16px;
}
.editor-fields .input-author { grid-column: 1 / -1; }
.editor-panes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  flex: 1;
  min-height: 0;
}
.editor-panes textarea {
  height: 100%;
  resize: none;
  font-family: SFMono-Regular, Consolas, Menlo, monospace;
}
.editor-preview {
  height: 100%;
  overflow-y: auto;
  border: 1px solid var(--color-border-default);
  background: var(--color-canvas-subtle);
  border-radius: 6px;
  padding: 16px;
}
.editor-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 16px;
}

@media (max-width: 720px) {
  .editor-fields { grid-template-columns: 1fr; }
  .editor-panes { grid-template-columns: 1fr; }
}