:root{--cyan: #00f0ff;--cyan-dim: #00f0ff88;--magenta: #ff00e5;--magenta-dim: #ff00e566;--blue: #4d7cff;--bg: #06060f;--surface: #0c0c1d;--surface-light: #14142b;--text: #e8e8f0;--text-dim: #8888aa;--border: #1a1a3a;--op-color: #ff6b2b;--fn-color: #2bff88;--equals-color: #00f0ff}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{min-height:100vh;background:var(--bg);font-family:SF Mono,Cascadia Code,Fira Code,ui-monospace,monospace;color:var(--text)}.app{min-height:100vh;display:grid;place-items:center;position:relative;overflow:hidden;padding:1.5rem}.bg-grid{position:fixed;top:0;right:0;bottom:0;left:0;background-image:linear-gradient(rgba(0,240,255,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(0,240,255,.03) 1px,transparent 1px);background-size:40px 40px;pointer-events:none}.bg-glow{position:fixed;border-radius:50%;filter:blur(120px);pointer-events:none;opacity:.4}.bg-glow-1{width:500px;height:500px;background:var(--cyan);top:-200px;right:-100px;animation:float1 12s ease-in-out infinite}.bg-glow-2{width:400px;height:400px;background:var(--magenta);bottom:-150px;left:-100px;animation:float2 15s ease-in-out infinite}@keyframes float1{0%,to{transform:translate(0)}50%{transform:translate(-60px,80px)}}@keyframes float2{0%,to{transform:translate(0)}50%{transform:translate(80px,-60px)}}.scanline{position:fixed;top:0;right:0;bottom:0;left:0;pointer-events:none;background:repeating-linear-gradient(0deg,transparent,transparent 2px,rgba(0,240,255,.008) 2px,rgba(0,240,255,.008) 4px)}.calculator-wrapper{position:relative;z-index:1}.calculator{width:340px;background:linear-gradient(135deg,var(--surface) 0%,#0a0a1a 100%);border:1px solid var(--border);border-radius:16px;overflow:hidden;box-shadow:0 0 0 1px #00f0ff0d,0 0 40px #00f0ff14,0 0 80px #ff00e50d,0 20px 60px #0009;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px)}.calc-header{display:flex;align-items:center;gap:6px;padding:10px 14px;border-bottom:1px solid var(--border);background:#0000004d}.header-dot{width:10px;height:10px;border-radius:50%}.dot-red{background:#f44;box-shadow:0 0 6px #f448}.dot-yellow{background:#fa0;box-shadow:0 0 6px #fa08}.dot-green{background:#2bff88;box-shadow:0 0 6px #2bff8888}.header-title{font-size:.65rem;letter-spacing:.15em;color:var(--text-dim);margin-left:8px;flex:1}.header-status{font-size:.55rem;letter-spacing:.2em;color:var(--cyan);text-shadow:0 0 8px var(--cyan-dim);animation:pulse 2s ease-in-out infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.display-container{position:relative;padding:20px 18px 16px;border-bottom:1px solid var(--border)}.display-bg{position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(180deg,rgba(0,240,255,.02) 0%,transparent 100%)}.display-content{position:relative;z-index:1}.display-sub{font-size:.8rem;color:var(--text-dim);min-height:1.2em;text-align:right;letter-spacing:.05em}.display-main{font-size:2.4rem;font-weight:600;text-align:right;color:var(--text);letter-spacing:-.02em;text-shadow:0 0 20px rgba(0,240,255,.3);word-break:break-all;min-height:1.3em;line-height:1.2}.display-reflection{position:absolute;bottom:0;left:18px;right:18px;height:1px;background:linear-gradient(90deg,transparent,var(--cyan-dim),transparent)}.btn-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;padding:14px}.calc-btn{font-family:inherit;font-size:1.1rem;font-weight:500;border:1px solid var(--border);border-radius:10px;padding:14px 8px;cursor:pointer;background:var(--surface-light);color:var(--text);transition:all .15s ease;position:relative;overflow:hidden;-webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent}.calc-btn:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(135deg,rgba(255,255,255,.04) 0%,transparent 50%);pointer-events:none}.calc-btn:hover{background:#1e1e40;border-color:#00f0ff33;transform:translateY(-1px);box-shadow:0 4px 12px #0000004d}.calc-btn:active{transform:translateY(0);box-shadow:none}.calc-btn.fn{color:var(--fn-color);border-color:#2bff8826;background:#2bff880f}.calc-btn.fn:hover{background:#2bff881f;border-color:#2bff884d;box-shadow:0 0 15px #2bff881a}.calc-btn.op{color:var(--op-color);border-color:#ff6b2b33;background:#ff6b2b14;font-size:1.3rem}.calc-btn.op:hover{background:#ff6b2b26;border-color:#ff6b2b59;box-shadow:0 0 15px #ff6b2b1a}.calc-btn.equals{color:#000;background:linear-gradient(135deg,var(--cyan),var(--blue));border-color:var(--cyan);font-weight:700;font-size:1.4rem;text-shadow:none}.calc-btn.equals:hover{box-shadow:0 0 25px #00f0ff66;border-color:var(--cyan)}.calc-btn.wide{text-align:left;padding-left:22px}.util-row{display:flex;justify-content:center;padding:0 14px 10px}.util-btn{font-family:inherit;font-size:.7rem;letter-spacing:.15em;color:var(--text-dim);background:transparent;border:1px solid rgba(255,255,255,.06);border-radius:6px;padding:6px 16px;cursor:pointer;transition:all .15s ease}.util-btn:hover{color:#f44;border-color:#ff44444d}.calc-footer{display:flex;align-items:center;justify-content:center;gap:8px;padding:8px 14px 12px;border-top:1px solid var(--border)}.calc-footer span:first-child{font-size:.55rem;letter-spacing:.2em;color:var(--text-dim);opacity:.5}.footer-blink{display:inline-block;width:5px;height:5px;border-radius:50%;background:var(--cyan);box-shadow:0 0 6px var(--cyan);animation:blink 1.5s step-end infinite}@keyframes blink{0%,to{opacity:1}50%{opacity:0}}@media(max-width:400px){.calculator{width:100%;max-width:340px}.display-main{font-size:2rem}.calc-btn{padding:12px 6px;font-size:1rem}}