:root { color-scheme: light; --bg: #f6f7f9; --card: #fff; --text: #1a1a1a; --muted: #666; --line: #ddd; --accent: #2563eb; --danger: #b91c1c; }
* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, "Segoe UI", sans-serif; background: var(--bg); color: var(--text); line-height: 1.5; }
.topbar { display: flex; justify-content: space-between; align-items: center; padding: 12px 16px; background: var(--card); border-bottom: 1px solid var(--line); }
.topbar h1 { margin: 0; font-size: 20px; }
.top-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.layout { max-width: 1100px; margin: 0 auto; padding: 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 16px; }
.login-card { max-width: 480px; margin: 40px auto; }
label { display: block; margin: 10px 0; font-size: 14px; }
input, textarea, select { width: 100%; padding: 9px 10px; margin-top: 4px; border: 1px solid var(--line); border-radius: 8px; font: inherit; }
button { padding: 8px 14px; border: 1px solid var(--line); border-radius: 8px; background: #fff; cursor: pointer; font: inherit; }
button:hover { border-color: var(--accent); }
button.danger { color: var(--danger); }
.muted { color: var(--muted); } .small { font-size: 13px; } .error { color: var(--danger); }
.toolbar { display: flex; gap: 8px; margin-bottom: 12px; flex-wrap: wrap; }
.toolbar input[type="search"] { flex: 1 1 220px; } .toolbar select { width: auto; }
.chips { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; }
.chip { border-radius: 999px; } .chip.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.columns { display: grid; grid-template-columns: 1fr 1.2fr; gap: 16px; align-items: start; }
.note-list { display: grid; gap: 10px; }
.note-item { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 12px; cursor: pointer; text-align: left; width: 100%; }
.note-item.active { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(37,99,235,.15); }
.note-item h3 { margin: 0 0 4px; font-size: 16px; }
.note-item p { margin: 0; color: var(--muted); font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.note-item .meta { font-size: 12px; color: var(--muted); margin-top: 6px; }
.pager { display: flex; gap: 10px; align-items: center; margin-top: 12px; }
.editor textarea { resize: vertical; }
.editor-tabs { display: flex; gap: 6px; margin: 8px 0; }
.tab { border-radius: 8px 8px 0 0; } .tab.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.preview { border: 1px solid var(--line); border-radius: 8px; padding: 12px; overflow-wrap: anywhere; }
.preview pre { overflow: auto; background: #f1f3f5; padding: 10px; border-radius: 6px; }
.preview img { max-width: 100%; }
.editor-actions { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
@media (max-width: 720px) {
  .columns { grid-template-columns: 1fr; }
  .topbar { flex-direction: column; align-items: flex-start; gap: 8px; }
  .login-card { margin: 16px auto; }
}