:root {
  --black-on-white-text-color: #111;
  --courier-font: "Courier New", Courier, monospace;
  --stendec-mint: #52bda8;
  --stendec-dark: #0e725f;
  --panel: #202523;
  --panel-soft: #2d3431;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 50% 20%, rgba(82, 189, 168, 0.16), transparent 36%),
    linear-gradient(180deg, #1d211f 0%, #171a19 100%);
  color: #eef6f2;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

button,
input {
  font: inherit;
}

.calculator-core {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.calculator-card {
  width: min(100%, 760px);
}

.calculator-scroll {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  overflow-x: auto;
  padding: 18px 0 12px;
  border: 1px solid rgba(82, 189, 168, 0.18);
  border-radius: 8px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02)),
    var(--panel);
  box-shadow: 0 22px 70px rgba(0, 0, 0, 0.28);
}

#pointer_div {
  position: relative;
  flex: 0 0 auto;
  outline: none;
}

#pointer_div:focus {
  box-shadow: 0 0 0 3px rgba(82, 189, 168, 0.42);
}

.hpkey2,
.hpkey2small {
  display: none;
}

.centerdiv_narrow {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  width: min(100%, 720px);
  margin: 18px auto 0;
  padding: 0 12px;
}

.centerdiv_narrow button {
  min-height: 42px;
  border: 1px solid rgba(82, 189, 168, 0.24);
  border-radius: 6px;
  background: linear-gradient(180deg, #3a413f 0%, #242b29 100%);
  color: #f2faf7;
  font-weight: 750;
  cursor: pointer;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.25);
}

.centerdiv_narrow button:hover,
.centerdiv_narrow button:focus-visible {
  border-color: rgba(82, 189, 168, 0.7);
  color: #ffffff;
}

#programmonitor {
  display: none;
}

.calculator-note {
  max-width: 680px;
  margin: 16px auto 0;
  color: rgba(238, 246, 242, 0.72);
  font-size: 0.86rem;
  line-height: 1.5;
  text-align: center;
}

@media (max-width: 720px) {
  .calculator-core {
    place-items: start center;
    padding: 16px 12px;
  }

  .calculator-scroll {
    align-items: flex-start;
  }

  #pointer_div {
    margin-left: 0;
  }
}