:root{
  --main:#00FF00;
}

html,body{
  height:100%;
  margin:0;
  font-family:monospace;
  color:var(--main);
  overflow: hidden;
}

.header {
  text-align: center;
  font-size: 1.7vw;
  color: var(--main);
}

.center {
  margin-top: 20vh;
  display:flex;
  align-items:center;
  justify-content:center;
  gap: 1vh;
  flex-direction:column;
  box-sizing:border-box;
}

.mainBtn {
  background: transparent;
  border: 5px solid var(--main);
  color: var(--main);
  font-size: clamp(18px, 5vw, 40px);
  padding: clamp(14px, 3vw, 28px) clamp(22px, 5vw, 44px);
  box-shadow: 0 8px 24px rgba(2,6,23,0.6);
  cursor: pointer;
  transition: transform .08s ease, box-shadow .08s ease, filter .08s ease;
  user-select: none;
  margin-top: -8vw;
}
.mainBtn:active{ transform:translateY(2px) scale(.996); filter:brightness(.98); box-shadow:0 4px 12px rgba(2,6,23,0.6);}

.countContainer {
  display: flex;
  flex-direction: row;
  align-items: center;
  font-size: clamp(20px, 4vw, 38px);
  color: var(--main);
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%) translateY(20px);
  padding: 10px 16px;
  color: var(--main);
  border: 4px solid var(--main);
  opacity: 0;
  pointer-events: none;
  transition: opacity 220ms ease, transform 220ms ease;
  z-index: 9999;
  font-weight: 700;
  font-size: 1.2vw;
  background: rgba(255,255,255,0.03);
  box-shadow: 0 6px 18px rgba(2,6,23,0.6);
}
.toast.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}

.upgradeButtonContainer {
  display: flex;
  flex-direction: row;
  justify-content: center;
  gap: 10vh;
  min-height: 300px;
  margin-top: 2vh;
  margin-bottom: 2vh;
}

.column {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 40px;
  flex: 1;
  max-width: 220px;
}

.upgradeBtn {
  position: relative;
  background: transparent;
  color: var(--main);
  border-color: var(--main);
  border-width: 3px;
  padding: 2vw 3vw;
  width: 24vw;
  height: 18vh;
  display: flex;
  justify-content: center;
  align-items: center;
}
.upgradeBtn:active{ transform:translateY(2px) scale(.996); filter:brightness(.98); box-shadow:0 4px 12px rgba(2,6,23,0.6);}

.asciiArt {
  position: absolute;
  right: 1vw;
  bottom: 1vw;
  font-family: monospace;
  font-size: .8vw;
  font-weight: 700;
  line-height: 1;
  user-select: none;
  white-space: pre;
}

.upgradeName {
  font-size: 1.6vw;
  text-align: center;
}

.priceTag {
  font-size: 1.2vw;
  text-align: center;
}

.countNumber {
  position: absolute;
  left: 1vw;
  font-size: clamp(14px, 5vw, 50px);
  font-weight: 700;
  user-select: none;
}

.tooltip {
    position: absolute;
    background: #111;
    color: #fff;
    padding: 6px 10px;
    font-size: 14px;
    pointer-events: none;
    opacity: 0;
    transform: translateY(-6px);
    transition: opacity 0.15s ease-out;
    z-index: 9999;
}

.vertical-divider {
  width: 2px;
  height: 43vh;
  align-self: stretch;
  margin: 16px 0;
  background-color: #00FF00;
}

.count {
  font-size:clamp(18px,5vw,32px);
  color: var(--main);
}

.visually-hidden { position:absolute !important; height:1px; width:1px; overflow:hidden; clip:rect(1px,1px,1px,1px); white-space:nowrap; }

.flagText {
  font-family: monospace;
  font-size: 24px;
  color: var(--main);
  text-align: center;
  margin-top: 12px;
}

#popup {
  display: none;
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 9999;

  background: hsl(154 50% 5%);
  border: 2px solid #0f0;
  padding: 2vh 2vw;

  justify-content: center;
  align-items: center;
  flex-direction: column;
}