* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: #fafbff;
  background-image: radial-gradient(#d4e4f1 5px, transparent 1px);
  background-size: 22px 22px;
}

.calculator-wrapper {
  position: relative;
  width: 700px;
  height: 700px;
}

.bg {
  position: absolute;
  width: 100%;
  height: 100%;
  z-index: 1;
}
.lines {
  position: absolute;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 2;
}

.base-calc {
  position: relative;  
  width: 700px;        
  height: 700px;
}

.base-buttons-grid {
  position: absolute;  
  left: 247px;
  top: 415px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: repeat(5, 1fr);
  gap: 11px;
}

.btn {
    padding: 0;
    margin: 0;
    border: none;
    background: none;
    outline: none;
    cursor: pointer;
    z-index: 10
}
.btn-img {
  position: relative;
  width: 44px;
  z-index: 3;
}
.btn:focus {
    outline: none;    
}

/* Screens only differ in font size, color and y-coordinates */
.screen {
  position: absolute;
  left: 239px;
  width: 230px;
  font-family: "Gamja Flower", system-ui;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.curr-screen {
  top: 368px;
  height: 28px;
  font-size: 30px;
  color: #0a0773;
  z-index: 5;
}
.old-screen {
  font-size: 25px;
  color: #3b3a78;
  z-index: 6;
  height: 26px;
}
.old-screen-1 {
  top: 330px;
}
.old-screen-2 {
  top: 290px; 
}
.old-screen-3 { 
  top: 252px; 
}

.sidebar {
  position: absolute; 
  top: 220px;
  right: 143px;
  width: 40%;    
  height: 40%;   
  transform: translateX(0);
  transition: transform 0.4s ease;
}
.sidebar.open {
  transform: translateX(183px); /* Sidebar sliding animation on click */
}
.sidebar.open ~ .sci-grid {
  opacity: 1;
  pointer-events: auto;    
}
.sidebar-img {
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

.sci-grid {
  position: absolute;
  top: 230px;
  right:180px;
  width: 0px;
  gap: 15px;
  height: 260px;
  display: grid; 
  grid-template-columns: repeat(3, 1fr); 
  grid-template-rows: repeat(4, 1fr);  
  z-index: 1;   
  opacity: 0;   
  pointer-events: auto;       
  transition: opacity 0.3s ease;    
}

.sidebar-toggle {
  position: absolute;
  top: 500px;
  right: 135px;
  z-index: 10; 
  background: none;
  border: none;
  outline: none;
  cursor: pointer;
}
.sidebar-toggle:focus {
    outline: none;
}
.sidebar-toggle img {
  width: 70px;
  height: 70px;
}

.sci-btn-img {
  position: relative;
  width: 40px;
  z-index: 3;
}

.watermark {
    position: absolute;
    font-size: 30px;
    font-family: "Gamja Flower", system-ui;
    color: #0a0773;
    bottom: 10px;
    left: 30px;
}

.music-btn {
  width: 50px; 
  height: 50px; 
  cursor: pointer; 
  position: fixed; 
  top: 30px; 
  right: 35px; 
  z-index: 100;
}

.social-icons {
  position: absolute;
  bottom: 35px;
  right: 35px;
}

.icon-img {
  width: 50px;
  height: 50px;
  padding: 5px;
}