.library-shell { display:grid; gap:18px; }
.chat-sidebar-label { margin-right:auto; color:var(--text-primary); font-size:13px; font-weight:700; }
.chat-new-icon { width:34px; height:34px; display:grid; place-items:center; border:0; border-radius:9px; background:transparent; color:var(--text-secondary); font-size:17px; cursor:pointer; }
.chat-new-icon:hover { background:var(--bg-tertiary); color:var(--text-primary); }
.chat-product-nav { display:grid; gap:2px; margin:0 0 12px; padding-bottom:12px; border-bottom:1px solid var(--border); }
.chat-product-nav-item { width:100%; display:flex; align-items:center; gap:10px; border:0; border-radius:10px; padding:9px 10px; background:transparent; color:var(--text-secondary); font:inherit; font-size:12px; font-weight:750; text-align:left; cursor:pointer; }
.chat-product-nav-item:hover { background:var(--bg-tertiary); color:var(--text-primary); }
.chat-product-nav-item i { font-size:17px; }
.chat-product-nav-item small { margin-left:auto; color:var(--text-tertiary); font-size:9px; font-weight:800; text-transform:uppercase; letter-spacing:.04em; }
.chat-product-nav-item.is-disabled { cursor:default; opacity:.68; }
.library-workspace { display:grid; grid-template-columns:230px minmax(0,1fr); gap:18px; min-height:calc(100vh - 88px); }
.library-rail { padding:10px; border:1px solid var(--border); border-radius:var(--radius-lg); background:var(--bg-surface); }
.library-rail-top { display:flex; align-items:center; justify-content:space-between; padding:3px 4px 10px; }
.library-rail-brand { color:var(--text-primary); font-size:13px; font-weight:700; }
.library-rail .chat-product-nav { border-bottom:0; }
.library-rail .chat-product-nav-item.active { background:var(--bg-tertiary); color:var(--text-primary); }
.library-content { min-width:0; }
.library-usage { display:grid; grid-template-columns:minmax(0,1fr) auto; align-items:center; gap:18px; padding:18px 20px; border:1px solid var(--border); border-radius:var(--radius-lg); background:var(--bg-surface); }
.library-usage-copy { display:grid; gap:8px; }
.library-usage-line { display:flex; justify-content:space-between; gap:12px; color:var(--text-secondary); font-size:12px; font-weight:700; }
.library-usage-track { height:8px; overflow:hidden; border-radius:999px; background:var(--bg-tertiary); }
.library-usage-fill { height:100%; width:0; border-radius:inherit; background:linear-gradient(90deg,var(--primary),#7c3aed); transition:width .2s ease; }
.library-toolbar { display:grid; grid-template-columns:minmax(220px,1fr) auto auto; gap:10px; align-items:center; }
.library-search { position:relative; }
.library-search i { position:absolute; left:12px; top:50%; transform:translateY(-50%); color:var(--text-tertiary); }
.library-search input, .library-control { width:100%; padding:11px 12px; border:1px solid var(--border); border-radius:12px; background:var(--bg-secondary); color:var(--text-primary); }
.library-search input { padding-left:36px; }
.library-view-toggle { display:flex; padding:3px; border:1px solid var(--border); border-radius:10px; background:var(--bg-secondary); }
.library-view-toggle button { width:32px; height:32px; display:grid; place-items:center; border:0; border-radius:7px; background:transparent; color:var(--text-tertiary); cursor:pointer; }
.library-view-toggle button.active { background:var(--bg-surface); color:var(--text-primary); box-shadow:var(--shadow-sm); }
.library-selection-bar { display:flex; align-items:center; gap:12px; min-height:34px; color:var(--text-secondary); font-size:11px; }
.library-selection-bar label { display:flex; align-items:center; gap:7px; cursor:pointer; }
.library-selection-bar #library-selection-count { margin-right:auto; color:var(--text-tertiary); }
.library-tabs { display:flex; gap:6px; flex-wrap:wrap; }
.library-tab { border:1px solid var(--border); border-radius:999px; padding:8px 12px; background:var(--bg-surface); color:var(--text-secondary); font:inherit; font-size:12px; font-weight:750; cursor:pointer; }
.library-tab.active { border-color:var(--primary); background:var(--primary-soft); color:var(--primary); }
.library-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(245px,1fr)); gap:14px; }
.library-card { position:relative; display:grid; grid-template-rows:auto 1fr auto; min-height:190px; padding:16px; border:1px solid var(--border); border-radius:var(--radius-lg); background:var(--bg-surface); box-shadow:var(--shadow-sm); }
.library-card.selected { border-color:var(--primary); box-shadow:0 0 0 2px var(--primary-soft); }
.library-card-select { position:absolute; top:12px; right:12px; z-index:2; display:grid; place-items:center; width:22px; height:22px; border-radius:7px; background:rgba(255,255,255,.92); cursor:pointer; }
.library-card-head .badge { margin-right:28px; }
.library-grid.library-list { display:flex; flex-direction:column; gap:6px; }
.library-grid.library-list .library-card { grid-template-columns:auto minmax(0,1fr) auto; grid-template-rows:1fr; align-items:center; gap:14px; min-height:0; padding:11px 46px 11px 12px; box-shadow:none; }
.library-grid.library-list .library-card-head { display:block; }
.library-grid.library-list .library-card-head .badge { display:none; }
.library-grid.library-list .library-file-icon { width:36px; height:36px; border-radius:10px; font-size:18px; }
.library-grid.library-list .library-card-title { margin:0 0 3px; }
.library-grid.library-list .library-card-meta br { display:none; }
.library-grid.library-list .library-card-meta br:after { content:' · '; }
.library-grid.library-list .library-card-actions { margin:0; flex-wrap:nowrap; }
.library-card-head { display:flex; justify-content:space-between; gap:12px; align-items:flex-start; }
.library-file-icon { width:42px; height:42px; border-radius:13px; display:grid; place-items:center; color:var(--primary); background:var(--primary-soft); font-size:21px; }
.library-card-title { margin:14px 0 5px; font-size:14px; line-height:1.35; font-weight:800; color:var(--text-primary); overflow-wrap:anywhere; }
.library-card-meta { color:var(--text-tertiary); font-size:11px; line-height:1.55; }
.library-card-actions { display:flex; gap:7px; flex-wrap:wrap; align-items:center; margin-top:16px; }
.library-empty, .library-error { grid-column:1/-1; display:grid; place-items:center; min-height:250px; padding:32px; border:1px dashed var(--border); border-radius:var(--radius-lg); text-align:center; color:var(--text-secondary); background:var(--bg-surface); }
.library-empty i, .library-error i { display:block; margin-bottom:12px; color:var(--primary); font-size:34px; }
.library-status { min-height:18px; font-size:12px; color:var(--text-secondary); }
.library-status.error { color:var(--danger); }
.library-preview-body { min-height:320px; display:grid; place-items:center; background:var(--bg-page); border-radius:var(--radius-md); overflow:hidden; }
.library-preview-body img, .library-preview-body video { display:block; max-width:100%; max-height:65vh; }
.library-preview-body iframe { width:100%; height:65vh; border:0; background:#fff; }
.library-preview-body audio { width:min(520px,90%); }
.library-upload-progress { display:none; gap:8px; align-items:center; font-size:12px; color:var(--text-secondary); }
.library-upload-progress.active { display:flex; }
@media (max-width:820px) { .library-workspace { grid-template-columns:1fr; } .library-rail { min-height:auto; } .library-toolbar { grid-template-columns:1fr; } .library-usage { grid-template-columns:1fr; } }