/* Namespaced components; load tokens.css before this file. */
.lb-root { font:14px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC",sans-serif; color:var(--lb-text); -webkit-font-smoothing:antialiased; }
.lb-root * { box-sizing:border-box; }
.lb-root [hidden] { display:none!important; }
.lb-root button,.lb-root input,.lb-root select,.lb-root textarea { font:inherit; }
.lb-root button { cursor:pointer; }
.lb-root :focus-visible { outline:2px solid var(--lb-focus); outline-offset:3px; }
.lb-root h1,.lb-root h2,.lb-root h3,.lb-root p { margin-top:0; }
.lb-root a { color:inherit; }
.lb-root code { font:12px ui-monospace,"SFMono-Regular",Consolas,monospace; }
.lb-sprite { position:absolute; width:0; height:0; overflow:hidden; }
.lb-icon { width:18px; height:18px; fill:none; stroke:currentColor; stroke-width:1.8; stroke-linecap:round; stroke-linejoin:round; flex-shrink:0; }
.lb-logo { width:34px; height:34px; object-fit:contain; }
.lb-brand { display:flex; align-items:center; gap:10px; font-size:22px; font-weight:650; letter-spacing:-.5px; }
.lb-muted,.lb-helper { color:var(--lb-text-secondary); }
.lb-helper { font-size:12px; line-height:1.8; margin:6px 0 0; }
.lb-row { display:flex; align-items:center; flex-wrap:wrap; gap:12px; }
.lb-stack { display:flex; flex-direction:column; gap:16px; }
.lb-button { display:inline-flex; align-items:center; justify-content:center; gap:7px; min-height:38px; padding:8px 14px; border:1px solid var(--lb-line); border-radius:10px; background:var(--lb-surface); color:var(--lb-text); font-weight:500; text-decoration:none; transition:background .12s; }
.lb-button:hover { background:var(--lb-subtle); }
.lb-primary { background:var(--lb-action); color:var(--lb-on-action); border-color:transparent; }
.lb-root a.lb-primary { color:var(--lb-on-action); }
.lb-primary:hover { background:var(--lb-action-hover); }
.lb-ghost { background:transparent; border-color:transparent; color:var(--lb-text-secondary); }
.lb-ghost:hover { background:var(--lb-raised); color:var(--lb-text); }
.lb-icon-button { width:36px; min-width:36px; height:36px; min-height:36px; padding:8px; }
.lb-send { width:36px; min-width:36px; height:36px; min-height:36px; padding:0; border-radius:50%; font-size:23px; line-height:1; }
.lb-button:disabled { opacity:.45; cursor:default; }
.lb-button[aria-busy="true"] { cursor:wait; }
.lb-field { display:flex; flex-direction:column; gap:7px; font-size:13px; font-weight:500; }
.lb-input,.lb-select { display:block; width:100%; min-height:42px; padding:10px 12px; border:1px solid var(--lb-border-strong); border-radius:10px; color:var(--lb-text); background:var(--lb-surface); font-weight:400; }
.lb-input::placeholder { color:var(--lb-placeholder); }
.lb-input:focus,.lb-select:focus { border-color:var(--lb-focus); box-shadow:0 0 0 3px var(--lb-focus-ring); outline:none; }
.lb-input:disabled { background:var(--lb-subtle); color:var(--lb-text-secondary); }
.lb-input[aria-invalid="true"] { border-color:var(--lb-danger); }
.lb-check { display:flex; align-items:center; gap:9px; font-size:13px; font-weight:400; }
.lb-check input { accent-color:var(--lb-action); width:16px; height:16px; }
.lb-segment { display:inline-flex; padding:3px; gap:3px; border-radius:12px; background:var(--lb-subtle); }
.lb-segment .lb-button { min-height:34px; border:0; background:transparent; padding:6px 13px; color:var(--lb-text-secondary); }
.lb-segment [aria-pressed="true"] { background:var(--lb-surface); color:var(--lb-text); box-shadow:0 1px 3px var(--lb-small-shadow); }
.lb-nav-item { display:flex; align-items:center; gap:10px; padding:10px; min-height:40px; width:100%; border:0; border-radius:10px; background:transparent; text-decoration:none; text-align:left; color:var(--lb-text); }
.lb-nav-item:hover { background:var(--lb-raised); }
.lb-nav-item[aria-current],.lb-nav-item[aria-selected="true"] { background:var(--lb-selected); }
.lb-section-label { font-size:12px; color:var(--lb-text-secondary); padding:8px 10px; margin-top:16px; }
.lb-panel { border:1px solid var(--lb-line); background:var(--lb-surface); border-radius:20px; padding:24px; }
.lb-menu-anchor { position:relative; display:inline-flex; }
.lb-menu { position:absolute; right:0; top:calc(100% + 8px); width:190px; z-index:30; padding:7px; border:1px solid var(--lb-line); border-radius:14px; background:var(--lb-surface); box-shadow:0 8px 30px var(--lb-small-shadow); }
.lb-menu-heading { display:block; padding:5px 9px; font-size:11px; color:var(--lb-text-secondary); }
.lb-menu-item { display:flex; align-items:center; gap:9px; width:100%; min-height:38px; padding:9px; border:0; border-radius:9px; background:transparent; color:var(--lb-text); text-align:left; }
.lb-menu-item:hover,.lb-menu-item:focus-visible { background:var(--lb-raised); }
.lb-menu-item[aria-checked="true"] { background:var(--lb-selected); }
.lb-menu-item .lb-checkmark { margin-left:auto; visibility:hidden; }
.lb-menu-item[aria-checked="true"] .lb-checkmark { visibility:visible; }
.lb-dialog { width:min(620px,calc(100vw - 32px)); max-height:88dvh; padding:0; color:var(--lb-text); border:1px solid var(--lb-line); border-radius:20px; background:var(--lb-surface); box-shadow:0 20px 80px #0003; }
.lb-dialog::backdrop { background:var(--lb-backdrop); }
.lb-dialog-form { display:flex; flex-direction:column; max-height:88dvh; }
.lb-dialog-header,.lb-dialog-footer { padding:18px 24px; display:flex; align-items:center; justify-content:space-between; gap:16px; flex-shrink:0; }
.lb-dialog-header h2 { margin:0; font-size:20px; font-weight:600; }
.lb-dialog-body { padding:0 24px 24px; overflow-y:auto; min-height:0; }
.lb-dialog-footer { border-top:1px solid var(--lb-line); }
.lb-error { color:var(--lb-danger); font-size:12px; }
.lb-status { display:inline-flex; font-size:12px; padding:5px 9px; border-radius:7px; background:var(--lb-subtle); color:var(--lb-text-secondary); }
.lb-error-panel { background:var(--lb-danger-bg); border:1px solid var(--lb-danger-line); border-radius:16px; padding:18px; }
.lb-error-panel strong { color:var(--lb-danger); }
.lb-error-panel p { margin:8px 0 12px; }
.lb-message-user { background:var(--lb-selected); border-radius:20px 20px 6px 20px; padding:16px 20px; margin:16px 0 16px auto; width:fit-content; max-width:85%; overflow-wrap:anywhere; }
.lb-message-assistant { padding:12px 0; overflow-wrap:anywhere; line-height:1.85; }
.lb-composer-context { display:flex; align-items:center; gap:16px; background:var(--lb-subtle); border-radius:20px 20px 0 0; margin:0 16px -12px; padding:12px 16px 22px; font-size:13px; }
.lb-composer { padding:18px 18px 12px; border:1px solid var(--lb-line); background:var(--lb-composer); border-radius:26px; box-shadow:0 2px 8px var(--lb-small-shadow); }
.lb-composer textarea { display:block; resize:none; border:0; outline:none; background:transparent; width:100%; min-height:82px; max-height:180px; font-size:16px; color:var(--lb-text); }
.lb-composer textarea::placeholder { color:var(--lb-placeholder); }
.lb-composer:focus-within { border-color:var(--lb-border-strong); }
.lb-composer-actions { display:flex; align-items:center; gap:8px; padding-top:8px; }
.lb-spacer { flex:1; }
.lb-empty { display:flex; flex-direction:column; align-items:center; justify-content:center; text-align:center; min-height:240px; padding:32px 16px; }
.lb-empty img { width:64px; height:64px; margin-bottom:24px; }
.lb-empty h2 { font-size:clamp(24px,2.4vw,34px); font-weight:500; letter-spacing:-.8px; margin:0 0 12px; }
.lb-empty p { font-size:14px; color:var(--lb-text-secondary); }
.lb-toast { position:fixed; bottom:24px; left:50%; transform:translateX(-50%); padding:12px 18px; border:1px solid var(--lb-line); border-radius:12px; background:var(--lb-surface); color:var(--lb-text); box-shadow:0 8px 30px var(--lb-small-shadow); z-index:100; max-width:calc(100vw - 32px); }
@media(max-width:520px) { .lb-panel { padding:18px; } .lb-dialog-header,.lb-dialog-footer { padding:16px 18px; } .lb-dialog-body { padding:0 18px 18px; } .lb-composer { border-radius:22px; padding:14px 12px 10px; } .lb-composer-actions { gap:4px; } }
@media(prefers-reduced-motion:reduce) { .lb-root * { transition:none!important; scroll-behavior:auto!important; } }