.nbs-root{--nbs-bg:var(--vnb-material-strong,rgb(22 24 29));--nbs-card:rgb(255 255 255/0.05);--nbs-card-strong:rgb(255 255 255/0.09);--nbs-label:var(--vnb-label,#f2f4f8);--nbs-soft:var(--vnb-label-soft,rgb(242 244 248/0.8));--nbs-muted:var(--vnb-label-muted,#94a5bd);--nbs-line:var(--vnb-separator,rgb(120 128 140/0.42));--nbs-accent:var(--vnb-accent,#5cc6f7);--nbs-danger:var(--vnb-danger,#f43f5e);--nbs-good:#34d399;--nbs-warn:#fbbf24;display:flex;flex-direction:column;min-width:0;height:100%;background:var(--nbs-bg);color:var(--nbs-label);font-size:14px;line-height:1.5}html[data-theme=light] .nbs-root{--nbs-bg:var(--vnb-material-strong,rgb(252 252 253));--nbs-card:rgb(15 23 42/0.04);--nbs-card-strong:rgb(15 23 42/0.08);--nbs-label:var(--vnb-label,#0b1220);--nbs-soft:var(--vnb-label-soft,rgb(11 18 32/0.8));--nbs-muted:var(--vnb-label-muted,#5b6b82);--nbs-line:var(--vnb-separator,rgb(60 60 67/0.26));--nbs-good:#059669;--nbs-warn:#b45309}.nbs-header{display:flex;flex-direction:column;gap:8px;padding:12px 12px 10px;border-block-end:1px solid var(--nbs-line)}.nbs-header-row{display:flex;align-items:center;gap:8px;min-width:0}.nbs-title{font-weight:700;font-size:15px;flex:1 1 auto;min-width:0}.nbs-chips{display:flex;flex-wrap:wrap;gap:6px;min-width:0}.nbs-body{flex:1 1 auto;min-height:0;overflow-y:auto;overscroll-behavior:contain;padding:12px;display:flex;flex-direction:column;gap:12px}.nbs-btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:36px;padding:6px 12px;border-radius:10px;border:1px solid var(--nbs-line);background:var(--nbs-card);color:var(--nbs-label);font:inherit;font-size:13px;font-weight:600;cursor:pointer;text-align:center}.nbs-btn:hover{background:var(--nbs-card-strong)}.nbs-action:focus-visible,.nbs-btn:focus-visible,.nbs-chip:focus-visible,.nbs-dot:focus-visible,.nbs-option:focus-visible{outline:2px solid var(--nbs-accent);outline-offset:2px}.nbs-btn[aria-disabled=true]{opacity:.55}.nbs-btn--primary{background:var(--nbs-accent);border-color:transparent;color:#04121c}.nbs-btn--primary:hover{filter:brightness(1.06);background:var(--nbs-accent)}.nbs-btn--quiet{background:transparent;border-color:transparent;color:var(--nbs-soft)}.nbs-btn--tall{min-height:44px}.nbs-chip{display:inline-flex;align-items:center;gap:6px;max-width:100%;min-height:32px;padding:4px 10px;border-radius:999px;border:1px solid var(--nbs-line);background:var(--nbs-card);color:var(--nbs-label);font:inherit;font-size:12.5px;font-weight:600;cursor:pointer}.nbs-chip span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.nbs-menu{position:absolute;z-index:20;inset-inline-start:0;top:calc(100% + 6px);min-width:220px;max-width:min(320px,86vw);max-height:60vh;overflow-y:auto;padding:6px;border-radius:12px;border:1px solid var(--nbs-line);background:var(--nbs-bg);box-shadow:0 10px 30px rgb(0 0 0/.35)}.nbs-menu-item{display:flex;align-items:center;gap:8px;width:100%;min-height:36px;padding:6px 10px;border:0;border-radius:8px;background:transparent;color:var(--nbs-label);font:inherit;font-size:13px;text-align:start;cursor:pointer}.nbs-menu-item:hover,.nbs-menu-item[aria-checked=true]{background:var(--nbs-card-strong)}.nbs-menu-item[aria-disabled=true]{color:var(--nbs-muted)}.nbs-actions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.nbs-action{display:flex;flex-direction:column;align-items:flex-start;gap:2px;min-height:56px;padding:10px 12px;border-radius:12px;border:1px solid var(--nbs-line);background:var(--nbs-card);color:var(--nbs-label);font:inherit;text-align:start;cursor:pointer}.nbs-action:hover{background:var(--nbs-card-strong)}.nbs-action strong{font-size:13.5px}.nbs-action small{font-size:11.5px;color:var(--nbs-muted)}.nbs-action[data-locked=true] small{color:var(--nbs-warn)}.nbs-card{border:1px solid var(--nbs-line);border-radius:12px;background:var(--nbs-card);padding:12px;min-width:0}.nbs-muted{color:var(--nbs-muted);font-size:12.5px}.nbs-alert{border-radius:10px;padding:8px 10px;font-size:13px;background:rgb(251 191 36/.1);border:1px solid rgb(251 191 36/.35);color:var(--nbs-label)}.nbs-alert--danger{background:rgb(244 63 94/.1);border-color:rgb(244 63 94/.35)}.nbs-good{color:var(--nbs-good);font-weight:700}.nbs-bad{color:var(--nbs-danger);font-weight:700}.nbs-field{display:flex;flex-direction:column;gap:6px}.nbs-field label,.nbs-legend{font-size:12px;font-weight:700;color:var(--nbs-soft)}.nbs-input,.nbs-textarea{width:100%;min-width:0;border-radius:10px;border:1px solid var(--nbs-line);background:var(--nbs-card);color:var(--nbs-label);font:inherit;font-size:16px;padding:8px 10px}.nbs-textarea{min-height:72px;resize:vertical}.nbs-segment{display:flex;flex-wrap:wrap;gap:6px}.nbs-segment .nbs-chip[aria-pressed=true]{border-color:var(--nbs-accent);background:rgb(92 198 247/.16)}.nbs-history{display:flex;flex-direction:column;gap:6px}.nbs-history-item{display:flex;align-items:center;gap:8px;width:100%;min-height:44px;padding:8px 10px;border-radius:10px;border:1px solid var(--nbs-line);background:transparent;color:var(--nbs-label);font:inherit;font-size:13px;text-align:start;cursor:pointer}.nbs-history-item:hover{background:var(--nbs-card)}.nbs-badge{flex:none;font-size:11px;font-weight:700;padding:1px 8px;border-radius:999px;background:rgb(251 191 36/.16);color:var(--nbs-warn)}.nbs-nav{display:flex;flex-wrap:wrap;gap:6px}.nbs-dot{width:32px;height:32px;border-radius:999px;border:1px solid var(--nbs-line);background:var(--nbs-card);color:var(--nbs-label);font:inherit;font-size:12px;font-weight:700;cursor:pointer}.nbs-dot[aria-current=step]{border-color:var(--nbs-accent);box-shadow:0 0 0 2px rgb(92 198 247/.35)}.nbs-dot[data-state=correct]{background:rgb(52 211 153/.2);border-color:var(--nbs-good)}.nbs-dot[data-state=incorrect]{background:rgb(244 63 94/.18);border-color:var(--nbs-danger)}.nbs-dot[data-state=revealed],.nbs-dot[data-state=skipped]{background:rgb(251 191 36/.14)}.nbs-options{display:flex;flex-direction:column;gap:8px}.nbs-option{display:flex;align-items:flex-start;gap:10px;width:100%;min-height:44px;padding:10px 12px;border-radius:10px;border:1px solid var(--nbs-line);background:var(--nbs-card);color:var(--nbs-label);font:inherit;text-align:start;cursor:pointer}.nbs-option kbd{flex:none;font:700 11px ui-monospace,monospace;color:var(--nbs-muted);padding-top:2px}.nbs-option[data-state=correct]{border-color:var(--nbs-good);background:rgb(52 211 153/.14)}.nbs-option[data-state=incorrect]{border-color:var(--nbs-danger);background:rgb(244 63 94/.12)}.nbs-row{display:flex;flex-wrap:wrap;align-items:center;gap:8px}.nbs-spacer{flex:1 1 auto}.nbs-flashcard{display:grid;place-items:center;min-height:180px;padding:18px;border-radius:14px;border:1px solid var(--nbs-line);background:var(--nbs-card-strong);text-align:center;font-size:16px;cursor:pointer}.nbs-splitter{position:relative;width:12px;cursor:col-resize;touch-action:none;background:transparent;border:0;padding:0}.nbs-splitter:after{content:"";position:absolute;inset-block:calc(50% - 18px);inset-inline-start:4px;width:4px;border-radius:4px;background:var(--vnb-separator,rgb(120 128 140/.6))}.nbs-splitter:focus-visible{outline:2px solid var(--vnb-accent,#5cc6f7);outline-offset:-2px}.nbs-aside{position:relative;min-width:0;height:100%;overflow:hidden;border-inline-start:1px solid var(--vnb-separator,rgb(120 128 140/.42))}.nbs-sheet{position:fixed;inset-inline:0;bottom:0;z-index:70;height:88dvh;max-height:88dvh;border-start-start-radius:18px;border-start-end-radius:18px;overflow:hidden;box-shadow:0 -12px 40px rgb(0 0 0/.45);padding-bottom:var(--safe-bottom,0)}.nbs-sheet-back{position:sticky;top:0;z-index:2}