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var(--ti83-screen-text);background-color:#0000001a;font-weight:700}.mode-value{font-weight:700}.help-overlay{position:fixed;inset:0;background-color:#000000b3;display:flex;align-items:center;justify-content:center;z-index:10000;padding:20px}.help-modal{background:#fff;border-radius:12px;width:100%;max-width:800px;max-height:90vh;display:flex;flex-direction:column;box-shadow:0 10px 40px #0000004d;animation:slideIn .3s ease-out}.help-header{display:flex;justify-content:space-between;align-items:center;padding:20px 24px;border-bottom:2px solid #e5e7eb}.help-header h2{margin:0;color:#1f2937;font-size:1.5rem}.help-close{background:none;border:none;font-size:1.5rem;cursor:pointer;color:#6b7280;width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:6px;transition:all .2s}.help-close:hover{background-color:#f3f4f6;color:#1f2937}.help-tabs{display:flex;border-bottom:1px solid #e5e7eb;padding:0 24px;gap:8px}.help-tab{padding:12px 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