:root {
    --key-size: 50px; 
    --key-gap: 6px;     
    --border-radius: 5px;
    --base-font-size: 12px;
    --special-font-size: 10px;
    --key-bg: #fdfdfd;
    --key-border: #aaa;
    --key-color: #333;
    --container-bg: #bbb;
    --container-padding: 15px;
    --body-bg: #e1e1e1;

    
    --spacer-width-1u: var(--key-size);
    --spacer-width-0_5u: calc(var(--key-size) * 0.5);

    
    --spacer-fkeys-1: calc(var(--spacer-width-1u) - 4px); 
    --spacer-fkeys-2: var(--spacer-width-0_5u);     
    --spacer-fkeys-3: var(--spacer-width-0_5u);     

    
    --spacer-nav-lhs-row1: calc(var(--spacer-width-1u) - var(--key-gap) + 4px); 
    --spacer-nav-lhs-row2to6: var(--spacer-width-1u);                     

    
    --spacer-nav-block: calc(var(--key-size) * 3 + var(--key-gap) * 2); 
    --spacer-arrow-l: var(--spacer-width-1u);
    --spacer-arrow-r: var(--spacer-width-1u);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
    background-color: var(--body-bg);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 15px;
    color: var(--key-color);
    margin: 0;
    padding-bottom: 70px; 
}

.controls {
    margin-bottom: 25px;
    display: flex;
    align-items: center;
    gap: 10px; 
    background-color: #c9c9c9;
    padding: 10px 15px;
    border-radius: var(--border-radius);
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.2);
}

#keyboard-container {
    background-color: var(--container-bg);
    padding: var(--container-padding);
    border-radius: 8px;
    border: 1px solid #999;
    box-shadow: 0 5px 15px rgba(0,0,0,0.25);
    width: fit-content;
}


.keyboard-layout {
    display: none; 
}

.keyboard-layout.active {
    display: block; 
}



#ansi-layout.active .keyboard--ansi,
#iso-layout.active .keyboard--iso {
     display: flex; 
    gap: calc(var(--key-size) + var(--key-gap)); 
    align-items: flex-start; 
}


.main-keyboard-area {
    display: flex;
    flex-direction: column;
    gap: var(--key-gap);
}

.numpad-area {
    display: flex;
    flex-direction: column;
    gap: var(--key-gap);
    margin-top: 50px; 
}

.keyboard__row {
    display: flex;
    gap: var(--key-gap);
    height: var(--key-size); 
    align-items: flex-start; 
}

.key {
    background-color: var(--key-bg);
    border: 1px solid var(--key-border);
    border-bottom: 3px solid var(--key-border);
    border-radius: var(--border-radius);
    padding: 0;
    width: var(--key-size); 
    height: var(--key-size); 
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: var(--base-font-size);
    font-weight: 500;
    text-align: center;
    box-shadow: 0 1px 1px rgba(0,0,0,0.1);
    white-space: pre; 
    box-sizing: border-box; 
    flex-shrink: 0;
    color: var(--key-color); 
    cursor: default; 
    user-select: none; 
    position: relative; 
}


.key--spacer {
    background-color: transparent;
    border: none;
    box-shadow: none;
    padding: 0;
    height: auto; 
    align-self: stretch; 
    position: static; 
}


.key:not([class*='key--']):not(.key--arrow):not(.key--spacer) {
    font-size: calc(var(--base-font-size) * 0.9);
    line-height: 1.1;
    flex-direction: column;
    justify-content: space-around;
    padding: 4px 0;
}


.key--esc, .key--f, .key--sys, .key--nav, .key--num,
.key--tab, .key--backspace, .key--backslash, .key--caps, .key--enter, 
.key--shift-l, .key--shift-r, .key--ctrl, .key--win, .key--alt, 
.key--space, .key--menu, .key--plus, .key--enter-num, .key--zero,
.key--iso-extra 
 {
    font-size: var(--special-font-size);
}


.key--arrow { 
    font-size: calc(var(--base-font-size) * 1.5); 
    color: var(--key-color) !important; 
}


.key--w1_25 { width: calc(var(--key-size) * 1.25 + var(--key-gap) * 0.25); }
.key--w1_5 { width: calc(var(--key-size) * 1.5 + var(--key-gap) * 0.5); }
.key--w1_75 { width: calc(var(--key-size) * 1.75 + var(--key-gap) * 0.75); }
.key--w2 { width: calc(var(--key-size) * 2 + var(--key-gap) * 1); }
.key--w2_25 { width: calc(var(--key-size) * 2.25 + var(--key-gap) * 1.25); }
.key--w2_75 { width: calc(var(--key-size) * 2.75 + var(--key-gap) * 1.75); }
.key--w6_25 { width: calc(var(--key-size) * 6.25 + var(--key-gap) * 5.25); }


.key--h2 {
    height: calc(var(--key-size) * 2 + var(--key-gap) * 1);
}


.numpad__row:first-child {
     
}

.numpad__row:nth-child(2) { 
    display: flex; 
    gap: var(--key-gap);
    align-items: flex-start; 
    height: auto; 
}

.numpad-main-grid {
    display: grid;
    grid-template-columns: repeat(3, var(--key-size));
    grid-template-rows: repeat(4, var(--key-size)); 
    gap: var(--key-gap);
}


.key--zero.key--w2 {
    grid-column: span 2;
    width: calc(var(--key-size) * 2 + var(--key-gap)); 
}

.numpad-tall-keys {
    display: flex;
    flex-direction: column;
    gap: var(--key-gap);
}


.key--plus.key--h2,
.key--enter-num.key--h2 {
     height: calc(var(--key-size) * 2 + var(--key-gap)); 
}



.keyboard--iso .key--iso-enter {
    
    
    clip-path: polygon(
        0% 0%,      
        100% 0%,     
        100% 100%,   
        20% 100%,    
        20% 50%,     
        0% 50%      
    );
    
    justify-content: flex-end; 
    align-items: flex-start;  
    padding-top: 10px;
    padding-right: 10px; 
}


.keyboard--iso .key[data-code="Backslash"] {
   
}




.key.clicked {
  background-color: #a3e6a3; 
  border-bottom-color: #6dc46d; 
  color: #145a14; 
}

.key.pressed {
  background-color: #6dc46d; 
  border-bottom-color: #4a9b4a; 
  color: #ffffff; 
  transform: translateY(1px); 
  box-shadow: 0 0 1px rgba(0,0,0,0.1); 
}

.key.clicked.pressed {
    background-color: #6dc46d;
    border-bottom-color: #4a9b4a;
    color: #ffffff;
}


#latency-bar {
    margin-top: 40px; 
    padding: 10px 20px;
    background-color: #c9c9c9; 
    border-radius: var(--border-radius);
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.2);
    color: var(--key-color);
    font-family: monospace; 
    font-size: 14px;
    width: fit-content; 
    min-width: 150px; 
    text-align: center;
}

#latency-value {
    font-weight: bold;
    min-width: 60px; 
    display: inline-block; 
    text-align: right;
}


.controls span:first-child { 
    margin-right: 5px;
}

#layout-label { 
    margin-left: 5px;
    min-width: 35px; 
    display: inline-block;
}

.switch {
  position: relative;
  display: inline-block;
  width: 44px; 
  height: 24px; 
  vertical-align: middle; 
}

.switch input { 
  opacity: 0;
  width: 0;
  height: 0;
}

.slider { 
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc; 
  transition: .4s;
}

.slider:before { 
  position: absolute;
  content: "";
  height: 18px; 
  width: 18px;  
  left: 3px;    
  bottom: 3px;   
  background-color: white;
  transition: .4s;
}

input:checked + .slider { 
  background-color: #86c386; 
}

input:focus + .slider { 
  box-shadow: 0 0 1px #86c386;
}

input:checked + .slider:before { 
  transform: translateX(20px); 
}

.slider.round {
  border-radius: 24px; 
}

.slider.round:before {
  border-radius: 50%; 
}



#page-footer {
    position: fixed; 
    bottom: 40px;    
    left: 0;         
    right: 0;
    text-align: center; 
    font-size: 10px;
    color: black;
    z-index: 10; 
    pointer-events: none; 
}