:root{
  --sidebar-w: 280px;
  --bg: #f6f8ff;
  --card: #ffffff;
  --muted: #6b7280;
  --brand: #2563eb;
}
html,body,.app-root{height:100%;}
body{background: var(--bg);}
.sidebar{width: var(--sidebar-w); background:#fff; display:flex; flex-direction:column;}
.brand .avatar{width:34px;height:34px;display:grid;place-items:center;border-radius:10px;background:#eef2ff;}
.main{min-width:0;}
.topbar{background: rgba(255,255,255,.8); backdrop-filter: blur(8px);}
.search{position:relative; width: 320px; max-width: 45vw;}
.search i{position:absolute;left:12px;top:50%;transform:translateY(-50%); color:#9ca3af;}
.search input{padding-left:36px;}
.nav-subject .nav-link{display:flex;align-items:center;gap:.6rem;border-radius:12px;padding:.65rem .9rem;color:#111827;}
.nav-subject .nav-link.active{background:#eef2ff;color:#1d4ed8;}
.badge-mini{font-size:.7rem;color:var(--muted);}
.pill{display:inline-block;padding:.15rem .5rem;border-radius:999px;background:#f3f4f6;color:#374151;font-size:.8rem;}
.sentence{font-size:1.25rem; line-height:1.6;}
.sentence .tok{cursor:pointer;border-bottom:1px dashed #c7d2fe;}
.sentence .tok:hover{background:#eef2ff;}
.card-mini{border-radius:16px;}
.card-mini .icon{width:44px;height:44px;border-radius:14px;display:grid;place-items:center;background:#eef2ff;color:#1d4ed8;font-size:1.2rem;}
.mode-actions{display:flex; gap:.5rem; flex-wrap:wrap;}
.kbd{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono","Courier New",monospace;background:#f3f4f6;border:1px solid #e5e7eb;border-bottom-width:2px;padding:.1rem .35rem;border-radius:.4rem;font-size:.8rem;}
.dark body, body.dark{background:#0b1220;color:#e5e7eb;}
body.dark .sidebar, body.dark .card, body.dark .modal-content, body.dark .topbar{background:#0f172a;color:#e5e7eb;}
body.dark .nav-subject .nav-link{color:#e5e7eb;}
body.dark .nav-subject .nav-link.active{background:#1f2a44;color:#93c5fd;}
body.dark .pill, body.dark .kbd{background:#111827;color:#e5e7eb;border-color:#1f2937;}
body.dark .form-control, body.dark .form-select{background:#0b1220;color:#e5e7eb;border-color:#1f2937;}
body.dark .text-muted{color:#94a3b8 !important;}
.lookup-body pre{white-space:pre-wrap;}


/* Word Bank grid (auto-fill) */
.wb-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px;}
.wb-card{background:#fff;border:1px solid rgba(0,0,0,.08);border-radius:14px;padding:14px;box-shadow:0 2px 10px rgba(0,0,0,.04);display:flex;flex-direction:column;min-height:132px;}
.wb-top{display:flex;align-items:flex-start;justify-content:space-between;gap:8px;}
.wb-lemma{font-weight:700;font-size:1.05rem;line-height:1.2;}
.wb-zh{margin-top:6px;min-height:1.2em;}
.wb-meta{margin-top:8px;color:rgba(0,0,0,.55);font-size:.85rem;}
.wb-actions{margin-top:auto;display:flex;gap:8px;justify-content:flex-end;}
.lookup-examples{display:flex;flex-direction:column;gap:10px;}
.ex-item{padding:10px 12px;border:1px solid rgba(0,0,0,.08);border-radius:12px;background:rgba(13,110,253,.03);}
.ex-en{font-size:.95rem;}
.ex-zh{font-size:.9rem;color:rgba(0,0,0,.6);margin-top:4px;}