:root {
  color-scheme: light dark;
  --bg: #f6f5f9;
  --surface: #ffffff;
  --surface-alt: #f0eef6;
  --border: #e2dfeb;
  --text: #201d29;
  --text-soft: #625d75;
  --accent: #6c4bd8;
  --accent-soft: #efeaff;
  --accent-text: #ffffff;
  --danger: #b4283a;
  --danger-soft: #fdecef;
  --shadow: 0 10px 30px rgba(32, 29, 41, .08);
  --radius: 14px;
  --font: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}
html[data-theme="dark"] {
  --bg: #16141c;
  --surface: #1f1c26;
  --surface-alt: #262230;
  --border: #34303f;
  --text: #f2effa;
  --text-soft: #a9a3bb;
  --accent: #a68cff;
  --accent-soft: #2c2440;
  --accent-text: #17141f;
  --danger: #ff8b9a;
  --danger-soft: #34202a;
  --shadow: 0 10px 30px rgba(0, 0, 0, .35);
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.55 var(--font);
  -webkit-font-smoothing: antialiased;
}
h1, h2 { margin: 0; }
.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;
}
.app {
  display: flex; flex-direction: column;
  min-height: 100vh; min-height: 100dvh;
}
.topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 14px 20px; background: var(--surface); border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 12px; min-width: 0; }
.brand-mark {
  display: grid; place-items: center; width: 36px; height: 36px; flex: none;
  border-radius: 11px; background: var(--accent-soft); color: var(--accent); font-size: 18px;
}
.brand-text { min-width: 0; }
.brand-text h1 { font-size: 17px; line-height: 1.3; letter-spacing: .01em; }
.brand-text p { margin: 0; font-size: 12.5px; color: var(--text-soft); overflow: hidden; white-space: nowrap; }
.topbar-actions { display: flex; align-items: center; gap: 8px; flex: none; }
.badge {
  font-size: 12px; padding: 3px 9px; border-radius: 999px;
  background: var(--accent-soft); color: var(--accent); border: 1px solid var(--border);
}
.who { font-size: 12.5px; color: var(--text-soft); max-width: 160px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.workspace {
  flex: 1; display: grid; gap: 0; grid-template-columns: minmax(240px, 320px) 1fr;
  min-height: 0; background: var(--bg);
}
.pane { min-height: 0; display: flex; flex-direction: column; }
.pane-list { background: var(--surface); border-right: 1px solid var(--border); }
.list-tools { display: flex; flex-direction: column; gap: 8px; padding: 12px; }
.search input {
  width: 100%; min-height: 40px; padding: 8px 12px; font: inherit; color: var(--text);
  background: var(--surface-alt); border: 1px solid var(--border); border-radius: 10px;
}
.note-list { list-style: none; margin: 0; padding: 0 8px 16px; overflow-y: auto; flex: 1; }
.note-item { margin: 2px 0; }
.note-button {
  display: flex; flex-direction: column; gap: 2px; width: 100%; text-align: left;
  padding: 10px 12px; min-height: 64px; font: inherit; color: inherit; cursor: pointer;
  background: transparent; border: 1px solid transparent; border-radius: 10px;
}
.note-button:hover { background: var(--surface-alt); }
.note-item[data-active="true"] .note-button { background: var(--accent-soft); border-color: var(--border); }
.note-title { font-weight: 600; font-size: 14px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.note-snippet { font-size: 12.5px; color: var(--text-soft); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.note-date { font-size: 11.5px; color: var(--text-soft); }
.empty, .list-hint { margin: 8px 14px; color: var(--text-soft); font-size: 13px; }
.list-hint { margin-top: auto; }
.pane-editor { background: var(--bg); position: relative; }
.editor-empty { margin: auto; padding: 32px; text-align: center; color: var(--text-soft); max-width: 420px; }
.editor-empty h2 { color: var(--text); font-size: 17px; margin-bottom: 6px; }
.editor-body { display: flex; flex-direction: column; flex: 1; min-height: 0; padding: 14px 18px 18px; gap: 10px; }
.editor-head { display: flex; align-items: center; gap: 8px; }
.back { display: none; }
.title-input {
  flex: 1; min-width: 0; min-height: 44px; padding: 6px 10px; font-size: 19px; font-weight: 650;
  color: var(--text); background: transparent; border: 1px solid transparent; border-radius: 10px;
}
.title-input:hover { border-color: var(--border); }
.title-input:focus { outline: none; border-color: var(--accent); background: var(--surface); }
.body-input {
  flex: 1; min-height: 240px; width: 100%; padding: 14px; font: inherit; line-height: 1.65;
  color: var(--text); background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); resize: none; box-shadow: var(--shadow);
}
.body-input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.editor-foot { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.meta { display: flex; gap: 12px; font-size: 12.5px; color: var(--text-soft); }
.editor-actions { display: flex; gap: 8px; }
.btn {
  min-height: 44px; padding: 8px 16px; font: inherit; font-weight: 600; cursor: pointer;
  border-radius: 11px; border: 1px solid var(--border); background: var(--surface); color: var(--text);
}
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.btn-ghost { background: transparent; }
.btn-danger { background: var(--danger-soft); border-color: var(--border); color: var(--danger); }
.btn-danger[data-confirm="true"] { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn:hover:not(:disabled) { filter: brightness(1.04); }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.status-line { padding: 0 18px 12px; font-size: 12.5px; color: var(--text-soft); min-height: 18px; }
.overlay {
  position: fixed; inset: 0; display: grid; place-items: center; padding: 20px;
  background: rgba(16, 14, 22, .55); z-index: 20;
}
.overlay-card {
  width: min(440px, 100%); background: var(--surface); color: var(--text);
  border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 22px;
}
.overlay-card h2 { font-size: 17px; margin-bottom: 8px; }
.overlay-card p { margin: 0 0 16px; color: var(--text-soft); font-size: 13.5px; }
.overlay-actions { display: flex; gap: 8px; }
.skeleton { padding: 16px; display: grid; gap: 10px; }
.skeleton span { display: block; height: 14px; border-radius: 7px; background: var(--surface-alt); }
@media (max-width: 820px) {
  .workspace { grid-template-columns: 1fr; }
  .pane-list { border-right: 0; border-bottom: 1px solid var(--border); }
  .app[data-selected="true"] .pane-list { display: none; }
  .app[data-selected="false"] .pane-editor { display: none; }
  .back { display: inline-flex; align-items: center; }
  .editor-body { padding: 10px 12px 14px; }
  .title-input { font-size: 17px; }
  .topbar { padding: 12px 14px; }
  .who { display: none; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }