.calc-display{min-height:76px;font-size:1.85rem;font-weight:700;text-align:right;padding:0.75rem 1rem;border-radius:12px;background:linear-gradient(135deg,rgba(13,110,253,0.06),rgba(13,110,253,0.01));border:1px solid rgba(13,110,253,0.12);overflow-x:auto;white-space:nowrap;word-break:break-all}[data-bs-theme="dark"] .calc-display{background:linear-gradient(135deg,rgba(13,110,253,0.12),rgba(0,0,0,0.2));border-color:rgba(13,110,253,0.2)}.calc-func-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:0.4rem;margin-top:1rem}.calc-keypad{display:grid;grid-template-columns:repeat(4,1fr);gap:0.5rem;margin-top:0.75rem}.calc-key{height:46px;font-weight:700;font-size:0.95rem;border-radius:10px}.calc-key.calc-key-wide{grid-column:span 4;height:52px;font-size:1.05rem}.calc-key-mem,.calc-key-func{font-size:0.75rem;height:40px}#mode-toggle-btn{font-weight:800;letter-spacing:0.03em}#memory-indicator{font-size:0.7rem;vertical-align:middle}.calc-history-panel{max-height:460px;overflow-y:auto}.feature-card{transition:transform 0.3s ease}.feature-card:hover{transform:translateY(-5px)}@media (max-width:576px){.calc-display{font-size:1.4rem}.calc-func-grid{grid-template-columns:repeat(4,1fr)}.calc-key{height:42px;font-size:0.8rem}}