@import "https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&display=swap";:root{--bg-gradient-1:#0f172a;--bg-gradient-2:#1e1b4b;--calc-bg:#ffffff0d;--calc-border:#ffffff1a;--text-primary:#f8fafc;--text-secondary:#94a3b8;--btn-bg:#ffffff14;--btn-bg-hover:#ffffff26;--btn-bg-active:#fff3;--btn-operator:#6366f1cc;--btn-operator-hover:#6366f1;--btn-special:#e11d48cc;--btn-special-hover:#e11d48;--shadow-sm:0 4px 6px -1px #0000001a, 0 2px 4px -1px #0000000f;--shadow-lg:0 10px 25px -5px #00000080, 0 8px 10px -6px #00000080}*{box-sizing:border-box;margin:0;padding:0}body{background:linear-gradient(135deg, var(--bg-gradient-1), var(--bg-gradient-2));color:var(--text-primary);-webkit-user-select:none;user-select:none;-webkit-font-smoothing:antialiased;justify-content:center;align-items:center;min-height:100vh;font-family:Inter,sans-serif;display:flex;overflow:hidden}.app-container{justify-content:center;align-items:center;width:100vw;height:100vh;display:flex;position:relative}.bg-blob{filter:blur(80px);z-index:-1;opacity:.6;animation:10s ease-in-out infinite alternate float;position:absolute}.blob-1{width:300px;margin:0;overflow:hidden}#root{justify-content:center;align-items:center;width:100%;height:100%;display:flex}@keyframes fadeIn{0%{opacity:0;transform:scale(.98)translateY(10px)}to{opacity:1;transform:scale(1)translateY(0)}}.fade-in{animation:.4s cubic-bezier(.16,1,.3,1) forwards fadeIn}.calculator{background:var(--calc-bg);-webkit-backdrop-filter:blur(24px);border:1px solid var(--calc-border);width:100%;max-width:400px;height:100vh;max-height:850px;box-shadow:var(--glass-shadow);border-radius:40px;flex-direction:column;padding:32px 20px 40px;display:flex;position:relative;overflow:hidden}@media (width<=450px){.calculator{border:none;border-radius:0;height:100vh;max-height:100vh}}.display{flex-direction:column;flex:1;justify-content:flex-end;align-items:flex-end;margin-bottom:20px;padding:20px 10px;display:flex}.display-equation{color:var(--text-secondary);letter-spacing:1px;min-height:2.2rem;font-size:1.8rem;font-weight:300}.display-current{color:var(--text-primary);word-break:break-all;letter-spacing:-2px;font-size:5.5rem;font-weight:300;line-height:1.1;transition:font-size .2s}.display-current.long-text{font-size:3rem}.keypad{grid-template-columns:repeat(4,1fr);gap:14px;display:grid}.btn{background:var(--btn-bg);color:var(--text-primary);aspect-ratio:1;cursor:pointer;border:none;border-radius:50%;justify-content:center;align-items:center;font-size:2rem;font-weight:400;transition:all .2s cubic-bezier(.25,.46,.45,.94);display:flex;box-shadow:0 4px 12px #0000001a}.btn:active{background:var(--btn-active);transform:scale(.92)}.btn:hover{background:var(--btn-hover)}.btn-operator{background:var(--operator-color);color:#fff;font-weight:500;box-shadow:0 4px 15px #ff9f0a4d}.btn-operator:hover{background:var(--operator-hover)}.btn-operator:active{background:#e58e09}.btn-special{background:var(--special-color);color:var(--text-primary);font-weight:500}.btn-zero{aspect-ratio:auto;border-radius:40px;grid-column:span 2;justify-content:flex-start;padding-left:30px}.secret-screen{-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);z-index:100;background:#0f172af2;flex-direction:column;width:100%;height:100%;padding:32px;animation:.5s cubic-bezier(.16,1,.3,1) forwards slideUp;display:flex;position:absolute;top:0;left:0}@keyframes slideUp{0%{opacity:0;transform:translateY(100%)}to{opacity:1;transform:translateY(0)}}.screen-header{text-align:center;margin-bottom:32px}.screen-header h2{background:linear-gradient(90deg,#818cf8,#c084fc);-webkit-text-fill-color:transparent;-webkit-background-clip:text;margin-bottom:8px;font-size:1.8rem;font-weight:600}.screen-header p{color:var(--text-secondary);font-size:.9rem}