:root{color-scheme:light dark}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,Arial}.app{min-height:100vh;background:#f8fafc;color:#0f172a}.dark .app{background:#0b1220;color:#e2e8f0}.crt .app{background:#000;color:#0f0;position:relative;background-image:radial-gradient(circle at 20% 80%,rgba(0,255,0,.05) 0%,transparent 50%),radial-gradient(circle at 80% 20%,rgba(0,255,0,.05) 0%,transparent 50%),radial-gradient(circle at 40% 40%,rgba(0,255,0,.03) 0%,transparent 50%)}.crt .scan{position:fixed;top:0;right:0;bottom:0;left:0;pointer-events:none;opacity:.3;mix-blend-mode:screen;background-image:linear-gradient(#0000 50%,#00000040 51%);background-size:100% 3px}.hacker-bg{position:fixed;top:0;left:0;width:100%;height:100%;pointer-events:none;overflow:hidden;z-index:-1;font-family:Courier New,monospace;font-size:12px;color:#00ff001a;line-height:1.2;white-space:pre}.hacker-code{position:absolute;animation:scrollDown 20s linear infinite;opacity:.15}.hacker-code:nth-child(1){animation-delay:0s}.hacker-code:nth-child(2){animation-delay:-5s}.hacker-code:nth-child(3){animation-delay:-10s}.hacker-code:nth-child(4){animation-delay:-15s}@keyframes scrollDown{0%{transform:translateY(-100vh)}to{transform:translateY(100vh)}}.glitch{position:relative;animation:glitch 2s infinite}@keyframes glitch{0%,to{transform:translate(0)}10%{transform:translate(-2px,2px)}20%{transform:translate(2px,-2px)}30%{transform:translate(-2px,2px)}40%{transform:translate(2px,-2px)}50%{transform:translate(-2px,2px)}60%{transform:translate(2px,-2px)}70%{transform:translate(-2px,2px)}80%{transform:translate(2px,-2px)}90%{transform:translate(-2px,2px)}}.terminal-cursor{animation:blink 1s infinite}@keyframes blink{0%,50%{opacity:1}51%,to{opacity:0}}.container{max-width:1000px;margin:0 auto;padding:24px;display:grid;gap:24px}@media (min-width: 1024px){.grid{display:grid;grid-template-columns:1.3fr 1fr;gap:24px}}.card{background:#fff;border:1px solid #e2e8f0;border-radius:16px;padding:16px}.dark .card{background:#0f172a;border-color:#233147}.crt .card{background:#000;border-color:#0f0;box-shadow:0 0 15px #0f03;border:1px solid #00ff00}.header{display:flex;align-items:center;justify-content:space-between;gap:12px}.h1{font-size:22px;font-weight:800;letter-spacing:-.01em}.input{width:100%;background:transparent;border:none;outline:none;font-size:28px;font-weight:700;color:inherit;padding:8px 0}.input::placeholder{opacity:.6;font-weight:500}.result{margin-top:12px;opacity:.85;font-size:16px;font-weight:600;padding:8px 12px;background:#0000000d;border-radius:8px;border-left:4px solid #4f46e5}.dark .result{background:#ffffff0d;border-left-color:#5b52f0}.crt .result{background:#00ff001a;border-left-color:#0f0;color:#0f0;text-shadow:0 0 5px rgba(0,255,0,.8)}.crt .input{color:#0f0;text-shadow:0 0 5px rgba(0,255,0,.6);caret-color:#0f0}.crt .input::placeholder{color:#00ff0080;text-shadow:0 0 3px rgba(0,255,0,.4)}.keypad{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.keypad .btn-eq{grid-column:span 4;min-height:70px;font-size:20px}.btn{-webkit-user-select:none;user-select:none;border-radius:14px;padding:16px 20px;font-size:18px;font-weight:600;border:2px solid transparent;cursor:pointer;transition:all .15s ease;min-height:60px;display:flex;align-items:center;justify-content:center}.btn:hover{transform:translateY(-2px);box-shadow:0 4px 12px #00000026}.btn:active{transform:translateY(0);box-shadow:0 2px 6px #0000001a}.btn-base{background:linear-gradient(145deg,#fff,#f1f5f9);color:#1e293b;border-color:#e2e8f0;box-shadow:0 2px 4px #0000000d}.btn-base:hover{background:linear-gradient(145deg,#f8fafc,#e2e8f0);border-color:#cbd5e1}.dark .btn-base{background:linear-gradient(145deg,#1e293b,#0f172a);color:#f1f5f9;border-color:#334155;box-shadow:0 2px 4px #0003}.dark .btn-base:hover{background:linear-gradient(145deg,#334155,#1e293b);border-color:#475569}.btn-op{background:linear-gradient(145deg,#f1f5f9,#e2e8f0);border-color:#cbd5e1;color:#475569;box-shadow:0 2px 4px #0000000d}.btn-op:hover{background:linear-gradient(145deg,#e2e8f0,#cbd5e1);border-color:#94a3b8;color:#334155}.dark .btn-op{background:linear-gradient(145deg,#334155,#1e293b);border-color:#475569;color:#cbd5e1;box-shadow:0 2px 4px #0003}.dark .btn-op:hover{background:linear-gradient(145deg,#475569,#334155);border-color:#64748b;color:#f1f5f9}.btn-eq{background:linear-gradient(145deg,#4f46e5,#3730a3);color:#fff;border-color:#3730a3;box-shadow:0 4px 8px #4f46e54d;font-weight:700}.btn-eq:hover{background:linear-gradient(145deg,#5b52f0,#4f46e5);box-shadow:0 6px 12px #4f46e566;transform:translateY(-3px)}.crt .btn-base{background:#000;color:#0f0;border-color:#0f0;box-shadow:0 0 10px #0f06;text-shadow:0 0 5px rgba(0,255,0,.8)}.crt .btn-base:hover{background:#010;box-shadow:0 0 15px #0f09;transform:translateY(-3px)}.crt .btn-op{background:#010;color:#0f0;border-color:#0f0;box-shadow:0 0 8px #00ff004d;text-shadow:0 0 5px rgba(0,255,0,.6)}.crt .btn-op:hover{background:#020;box-shadow:0 0 12px #00ff0080;transform:translateY(-3px)}.crt .btn-eq{background:linear-gradient(145deg,#0f0,#0a0);color:#000;border-color:#0f0;box-shadow:0 0 20px #0f0c;text-shadow:none;font-weight:700}.crt .btn-eq:hover{background:linear-gradient(145deg,#0f0,#0c0);box-shadow:0 0 25px #0f0;transform:translateY(-3px)}.row{display:flex;gap:10px;align-items:center}.select{border-radius:10px;padding:8px 12px;background:#fff;border:1px solid #e2e8f0}.dark .select{background:#0f172a;border-color:#233147;color:#e2e8f0}.crt .select{background:#000;border-color:#0f0;color:#0f0;box-shadow:0 0 5px #00ff004d}.history-item{border:1px solid #e2e8f0;border-radius:12px;padding:10px;cursor:pointer}.dark .history-item{border-color:#233147}.history-item:hover{background:#0206170a}.dark .history-item:hover{background:#e2e8f00f}.small{font-size:12px;opacity:.7}.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background-color:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.ai-explanation{background:linear-gradient(145deg,#4f46e50d,#4f46e505);border:1px solid rgba(79,70,229,.2);border-radius:12px;padding:16px;margin-bottom:8px;box-shadow:0 2px 8px #4f46e51a}.dark .ai-explanation{background:linear-gradient(145deg,#5b52f01a,#5b52f00d);border-color:#5b52f04d;box-shadow:0 2px 8px #5b52f033}.crt .ai-explanation{background:#79ff790d;border-color:#79ff794d;box-shadow:0 0 8px #79ff7933}.api-key-input{width:100%;padding:12px;border:1px solid #e2e8f0;border-radius:8px;font-size:14px;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;background:#fff;color:#0f172a}.dark .api-key-input{background:#0f172a;border-color:#233147;color:#e2e8f0}.crt .api-key-input{background:#000;border-color:#0a4;color:#79ff79}