#topbar {
  flex: none;
  height: var(--topbar-h);
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  position: relative;
  z-index: var(--z-sticky);
}

.tb {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 18px;
  gap: 16px;
}

.tb-left, .tb-right { display: flex; align-items: center; gap: 6px; min-width: 0; }
.tb-right { gap: 8px; }

.tb-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 34px;
  padding: 0 8px 0 4px;
  border-radius: var(--r-sm);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.tb-brand:hover { background: var(--paper-2); }
.tb-brand .logo-mark { width: 28px; height: 28px; border-radius: 7px; display: block; flex: none; }
.tb-brand .icon { color: var(--ink-3); }

.tb-sep { width: 1px; height: 18px; background: var(--line-2); margin: 0 6px; }

.tb-space {
  display: flex;
  align-items: center;
  gap: 6px;
  height: 30px;
  padding: 0 10px;
  border-radius: var(--r-sm);
  font-size: var(--fs-13);
  font-weight: 500;
  color: var(--ink-2);
  background: var(--paper-2);
}
.tb-space:hover { background: var(--paper-3); color: var(--ink); }

.tb-nav { display: flex; gap: 2px; margin-left: 10px; padding: 3px; border-radius: var(--r-md); background: var(--paper-2); }
.tb-link {
  height: 28px;
  display: inline-flex;
  align-items: center;
  padding: 0 12px;
  border-radius: 7px;
  font-size: var(--fs-13);
  font-weight: 500;
  color: var(--ink-3);
  transition: all var(--t-fast) var(--ease);
}
.tb-link:hover { color: var(--ink); }
.tb-link.on { color: var(--ink); background: var(--surface); box-shadow: var(--sh-1); }

.tb-search {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 300px;
  height: 34px;
  padding: 0 8px 0 12px;
  border-radius: 9px;
  background: var(--paper-2);
  border: 1px solid transparent;
  color: var(--ink-4);
  font-size: var(--fs-13);
  transition: border-color var(--t-fast) var(--ease);
}
.tb-search span:not(.kbd) { flex: 1; text-align: left; }
.tb-search:hover { border-color: var(--line); color: var(--ink-3); }
.tb-search .kbd { margin-left: -4px; }

.tb-icon {
  position: relative;
  width: 34px;
  height: 34px;
  border-radius: 9px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--ink-2);
}
.tb-icon:hover, .tb-icon.on { background: var(--paper-2); color: var(--ink); }
.tb-badge {
  position: absolute;
  top: 2px;
  right: 1px;
  min-width: 16px;
  height: 16px;
  padding: 0 4px;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-size: 10px;
  font-weight: 600;
  line-height: 16px;
  text-align: center;
  box-shadow: 0 0 0 2px var(--surface);
}
.tb-icon.has .icon { transform: translateX(-3px); }
.tb-me { margin-left: 4px; border-radius: 50%; }

/* search palette */
.sp { overflow: hidden; }
.sp-input { display: flex; align-items: center; gap: 10px; padding: 14px 18px; border-bottom: 1px solid var(--line); color: var(--ink-3); }
.sp-input .icon { width: 18px; height: 18px; }
.sp-input input { border: 0; font-size: var(--fs-16); background: transparent; color: var(--ink); }
.sp-results { max-height: 56vh; overflow: auto; padding: 6px; }
.sp-group + .sp-group { margin-top: 4px; }
.sp-head { padding: 8px 10px 4px; font-size: var(--fs-11); font-weight: 600; color: var(--ink-4); letter-spacing: 0.04em; }
.sp-row { display: flex; align-items: center; gap: 10px; width: 100%; padding: 7px 10px; border-radius: var(--r-sm); font-size: var(--fs-13); text-align: left; }
.sp-row.active, .sp-row:hover { background: var(--paper-2); }
.sp-row b { font-weight: 600; color: var(--accent); }
.sp-row .ml-2 { margin-left: 8px; }
.sp-foot { display: flex; align-items: center; gap: 6px; padding: 10px 16px; border-top: 1px solid var(--line); font-size: var(--fs-12); color: var(--ink-4); background: var(--surface-2); }

/* notifications */
.nt-head { padding: 14px 18px 6px; font-size: var(--fs-11); font-weight: 600; color: var(--ink-4); letter-spacing: 0.04em; }
.nt-row { display: flex; align-items: flex-start; gap: 12px; width: 100%; padding: 12px 18px; text-align: left; border-bottom: 1px solid var(--line-soft); }
.nt-row:hover { background: var(--surface-2); }
.nt-row.unread { background: var(--accent-soft); }
.nt-row .dot { margin-top: 6px; }
.nt-ico { width: 28px; height: 28px; border-radius: 8px; display: grid; place-items: center; background: var(--paper-2); color: var(--ink-2); flex: none; }
.nt-ico.wiki { background: var(--accent-soft); color: var(--accent); }
.nt-text { font-size: var(--fs-13); line-height: 1.5; color: var(--ink); }

/* shortcuts */
.sc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px 28px; }
.sc-row { padding: 6px 0; font-size: var(--fs-13); border-bottom: 1px solid var(--line-soft); }

/* shared page frame for library-type views */
.page-wrap { max-width: 1240px; margin: 0 auto; padding: 28px 32px 64px; }
.page-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin-bottom: 20px; }
.page-head h1 { font-size: var(--fs-24); font-weight: 600; letter-spacing: -0.02em; }