.calculator-buttons{display:grid;grid-template-columns:repeat(6,1fr);gap:6px}.calc-btn{padding:8px 4px;border:none;border-radius:6px;font-size:0.9rem;font-weight:600;cursor:pointer;transition:all 0.05s;background:#34495e;color:white;display:flex;align-items:center;justify-content:center;height:40px;box-shadow:0 3px 0 rgba(0,0,0,0.2);-webkit-tap-highlight-color:transparent}.calc-btn:active{transform:translateY(2px);box-shadow:none}.calc-btn:hover{filter:brightness(1.05)}.number-btn{background:#7f8c8d}.operator-btn{background:#e67e22}.function-btn{background:#3498db}.memory-btn{background:#8e44ad}.equals-btn{background:#2ecc71;color:white;grid-column:1 / -1}.clear-btn{background:#e74c3c}.backspace-btn{background:#d35400}.parentheses-btn{background:#16a085;unicode-bidi:plaintext}.memory-bar{display:flex;gap:6px;margin-bottom:12px;justify-content:center}.memory-indicator{background:rgba(255,255,255,0.1);padding:5px 10px;border-radius:4px;font-size:0.8rem;color:#ddd;border:1px solid rgba(255,255,255,0.2)}.calculator-display{background:#1a1a1a;color:white;padding:12px;border-radius:8px;margin-bottom:15px;text-align:left;direction:ltr;overflow:hidden;min-height:70px;border:2px solid #444;font-family:'Courier New',monospace}.result-display{font-size:1.8rem;font-weight:bold;text-align:right;word-break:break-all;color:white;min-height:35px;padding:10px 0;line-height:1.4;white-space:nowrap;overflow-x:auto;overflow-y:hidden}.calculator{background:#2c3e50;border-radius:15px;padding:15px;box-shadow:0 8px 25px rgba(0,0,0,0.2);margin-bottom:30px;border:1px solid #34495e;max-width:450px;margin-left:auto;margin-right:auto}@media(min-width:992px){.calculator{max-width:380px;padding:10px 12px}.calculator-display{min-height:58px;padding:10px}.result-display{font-size:1.45rem;min-height:30px}.calc-btn{height:34px;font-size:0.84rem;padding:6px 4px}}@media(max-width:992px){.calculator{max-width:400px;padding:12px}.calc-btn{height:38px;font-size:0.85rem}}@media(max-width:576px){.calculator{max-width:100%;padding:10px}.calculator-buttons{gap:5px}}@media(max-width:480px){.calc-btn{height:34px;font-size:0.75rem;padding:4px 2px}.calculator-buttons{gap:4px}.calculator-display{padding:8px;min-height:55px}.result-display{font-size:1.3rem;padding:6px 0}.memory-indicator{font-size:0.7rem;padding:3px 6px}}@media(max-width:380px){.calc-btn{height:30px;font-size:0.68rem;padding:2px 1px}.calculator-buttons{gap:3px}.calculator-display{padding:6px}.result-display{font-size:1.1rem;min-height:25px}.memory-bar{gap:4px}.memory-indicator{font-size:0.65rem;padding:2px 4px}}