.calc{position:relative;width:360px;background:var(--surface);border:1px solid var(--border);border-radius:24px;overflow:hidden;box-shadow:0 0 0 1px #00ffc80f,0 32px 80px #000c,inset 0 1px #ffffff0a;animation:shellIn .6s cubic-bezier(.16,1,.3,1) both}.calc--sci{width:420px}@keyframes shellIn{0%{opacity:0;transform:translateY(40px) scale(.95)}to{opacity:1;transform:translateY(0) scale(1)}}.calc__header{display:flex;align-items:center;justify-content:space-between;padding:14px 18px 6px}.calc__brand{font-family:Orbitron,monospace;font-size:.65rem;font-weight:700;letter-spacing:.2em;color:var(--accent);text-shadow:0 0 10px rgba(0,255,200,.5)}.blink{animation:blink 1s step-end infinite}@keyframes blink{50%{opacity:0}}.calc__header-btns{display:flex;gap:6px}.hbtn{background:transparent;border:1px solid var(--border);border-radius:8px;color:var(--text-dim);padding:4px 10px;font-size:.85rem;cursor:pointer;transition:all .2s}.hbtn:hover{color:var(--accent);border-color:var(--accent);box-shadow:var(--glow)}.hbtn--active{color:var(--func);border-color:var(--func)}.hist{max-height:120px;overflow-y:auto;padding:6px 18px;border-bottom:1px solid var(--border);scrollbar-width:thin;scrollbar-color:var(--accent) transparent;animation:histIn .25s ease both}@keyframes histIn{0%{opacity:0;max-height:0}to{opacity:1;max-height:120px}}.hist__empty{color:var(--text-dim);font-size:.75rem;text-align:center;padding:8px}.hist__item{font-size:.72rem;color:var(--text-dim);padding:3px 0;border-bottom:1px solid rgba(255,255,255,.03);font-family:Share Tech Mono,monospace}.hist__item:hover{color:var(--accent);cursor:default}.calc__display{position:relative;padding:18px 22px 14px;min-height:100px;text-align:right;background:linear-gradient(135deg,rgba(0,255,200,.03),transparent);border-bottom:1px solid var(--border);transition:background .3s;overflow:hidden}.calc__display:before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,var(--accent),transparent);animation:scanH 3s linear infinite;opacity:.4}@keyframes scanH{0%{transform:translate(-100%)}to{transform:translate(100%)}}.calc__display--flash{animation:displayFlash .3s ease}@keyframes displayFlash{0%{background:rgba(0,255,200,.15)}to{background:transparent}}.calc__expr{font-size:.75rem;color:var(--text-dim);min-height:1.2em;word-break:break-all;margin-bottom:4px;letter-spacing:.05em}.calc__val{color:var(--text);font-family:Orbitron,monospace;font-weight:700;letter-spacing:-1px;transition:font-size .15s ease;word-break:break-all;text-shadow:0 0 20px rgba(0,255,200,.2)}.calc__cursor{display:inline-block;width:2px;height:1.2em;background:var(--accent);margin-left:3px;vertical-align:middle;animation:cursorBlink 1.1s step-end infinite;border-radius:1px;box-shadow:0 0 6px var(--accent)}@keyframes cursorBlink{50%{opacity:0}}.sci-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:rgba(0,255,200,.04);border-bottom:1px solid var(--border);animation:gridIn .35s cubic-bezier(.16,1,.3,1) both}@keyframes gridIn{0%{opacity:0;transform:scaleY(.8);transform-origin:top}to{opacity:1;transform:scaleY(1)}}.basic-grid{display:flex;flex-direction:column;gap:1px;background:rgba(255,255,255,.03)}.basic-row{display:grid;grid-template-columns:repeat(4,1fr);gap:1px}.key{position:relative;overflow:hidden;aspect-ratio:1;border:none;outline:none;cursor:pointer;font-family:Orbitron,monospace;font-size:1rem;font-weight:700;display:flex;align-items:center;justify-content:center;transition:filter .15s,transform .1s,box-shadow .15s;-webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent;letter-spacing:.02em}.key--num{background:var(--surface2);color:#d4ede9}.key--func{background:#1a1a2e;color:var(--func);font-size:.9rem}.key--op{background:#1f0d1a;color:var(--op)}.key--eq{background:#001f18;color:var(--eq)}.key--sci{background:#0d0d1f;color:#a78bfa;font-size:.72rem;aspect-ratio:auto;padding:10px 6px;font-family:Share Tech Mono,monospace;letter-spacing:0}.key--down{filter:brightness(1.6);transform:scale(.92)}.key--op:hover{box-shadow:var(--glow2)}.key--eq:hover{box-shadow:var(--glow)}.key--num:hover{filter:brightness(1.2)}.key--sci:hover{color:var(--accent)}.ripple{position:absolute;width:6px;height:6px;border-radius:50%;background:rgba(255,255,255,.35);top:50%;left:50%;transform:translate(-50%,-50%) scale(0);animation:rippleAnim .55s ease-out forwards;pointer-events:none}@keyframes rippleAnim{to{transform:translate(-50%,-50%) scale(18);opacity:0}}.basic-row .key{animation:keyIn .4s cubic-bezier(.16,1,.3,1) both}.basic-row:nth-child(1) .key{animation-delay:calc(var(--i,0)*.04s + .1s)}.basic-row:nth-child(2) .key{animation-delay:calc(var(--i,0)*.04s + .2s)}.basic-row:nth-child(3) .key{animation-delay:calc(var(--i,0)*.04s + .3s)}.basic-row:nth-child(4) .key{animation-delay:calc(var(--i,0)*.04s + .4s)}.basic-row:nth-child(5) .key{animation-delay:calc(var(--i,0)*.04s + .5s)}@keyframes keyIn{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #050508;--surface: #0d0d14;--surface2: #12121e;--border: rgba(0,255,200,.12);--accent: #00ffc8;--accent2: #ff3cac;--accent3: #f9c846;--op: #ff3cac;--eq: #00ffc8;--func: #784fff;--text: #e8f4f0;--text-dim: #4a6b62;--glow: 0 0 20px rgba(0,255,200,.3);--glow2: 0 0 20px rgba(255,60,172,.3)}body{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg);font-family:Share Tech Mono,monospace;overflow:hidden}body:before{content:"";position:fixed;top:0;right:0;bottom:0;left:0;background:radial-gradient(ellipse 80% 50% at 20% 20%,rgba(0,255,200,.04) 0%,transparent 60%),radial-gradient(ellipse 60% 60% at 80% 80%,rgba(255,60,172,.04) 0%,transparent 60%);pointer-events:none;z-index:0}body:after{content:"";position:fixed;top:0;right:0;bottom:0;left:0;background:repeating-linear-gradient(0deg,transparent,transparent 2px,rgba(0,0,0,.15) 2px,rgba(0,0,0,.15) 4px);pointer-events:none;z-index:0;animation:scanroll 8s linear infinite}@keyframes scanroll{0%{background-position:0 0}to{background-position:0 100px}}