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#0000;margin-bottom:-1px;padding:8px 12px;font-weight:700}.mode-switch button.on{color:var(--ink);border-bottom-color:var(--crimson)}.calc-toggle{border:1.5px solid var(--rule-strong);color:var(--ink-2);background:0 0;margin-bottom:6px}.calc-toggle.on{border-color:var(--crimson);color:var(--crimson)}.work-area.with-calc{grid-template-columns:minmax(0,1fr) 260px;align-items:start;gap:20px;display:grid}.work-main{min-width:0}.source-tag{letter-spacing:.1em;text-transform:uppercase;color:var(--ink-2);white-space:nowrap;border:1.5px solid;border-radius:3px;flex:none;padding:3px 8px;font-size:.68rem;font-weight:700;display:inline-block;transform:rotate(-1.5deg)}.source-ai{color:var(--crimson)}.source-fallback{color:var(--mid)}.notice{border-left:3px solid var(--mid);background:var(--mid-bg);border-radius:0 4px 4px 0;margin:12px 0;padding:10px 14px}.notice p{margin:4px 0 0}.explain,.feedback{border-left:3px solid var(--rule-strong);background:var(--paper-2);border-radius:0 4px 4px 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