:root {
  --black-on-white-text-color: #111;
  --courier-font: "Courier New", Courier, monospace;
  --stendec-mint: #52bda8;
  --stendec-dark: #0e725f;
  --panel: #19201d;
}

* {
  box-sizing: border-box;
}

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

html {
  background: var(--panel);
}

body {
  margin: 0;
  background: transparent;
  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-loader {
  min-height: 330px;
  display: grid;
  gap: 16px;
  place-items: center;
  align-content: center;
  border: 1px solid rgba(82, 189, 168, 0.18);
  border-radius: 8px;
  background: rgba(32, 37, 35, 0.86);
  color: rgba(238, 246, 242, 0.78);
}

.calculator-loader[hidden],
.calculator-scroll[hidden] {
  display: none !important;
}

.calculator-loader span {
  width: 34px;
  height: 34px;
  border: 3px solid rgba(82, 189, 168, 0.2);
  border-top-color: var(--stendec-mint);
  border-radius: 50%;
  animation: calculator-spin 900ms linear infinite;
}

.calculator-loader.has-error span {
  display: none;
}

@keyframes calculator-spin {
  to { transform: rotate(360deg); }
}

.calculator-scroll {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  overflow: visible;
}

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

#pointer_div :is(
  #modifier,
  #rpnalg,
  #pgrm,
  #begin,
  #dmyc,
  #undo,
  #parentheses,
  #user,
  #trigo,
  #complex,
  #carry,
  #overflow,
  #wordstatus,
  #altdisplay
) {
  position: relative;
  top: 6px;
  color: var(--black-on-white-text-color);
  font-weight: 400;
  line-height: 1;
}

#pointer_div #rpnalg {
  font-size: 12px;
  letter-spacing: normal;
}

.hpkey2,
.hpkey2small {
  display: none;
}

.calculator-scroll.is-showing-shortcuts .hpkey2,
.calculator-scroll.is-showing-shortcuts .hpkey2small {
  display: inline-block !important;
}

.centerdiv_narrow {
  width: min(100%, 720px);
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px;
  margin: 18px auto 0;
  padding: 0 12px;
}

.centerdiv_narrow button {
  min-height: 42px;
  padding: 6px;
  border: 1px solid rgba(82, 189, 168, 0.24);
  border-radius: 6px;
  background: linear-gradient(180deg, #3a413f 0%, #242b29 100%);
  color: #f2faf7;
  font-size: 0.9rem;
  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: #fff;
}

.centerdiv_narrow button[aria-pressed="true"] {
  border-color: var(--stendec-mint);
  background: linear-gradient(180deg, #66cbb7 0%, #45ad98 100%);
  color: #09251f;
}

#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 {
    min-height: auto;
    place-items: start center;
    padding: 10px;
  }

  .calculator-loader {
    min-height: 260px;
  }

  #pointer_div {
    margin-left: 0;
  }

  .calculator-note {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .calculator-loader span {
    animation-duration: 1ms;
  }
}