/* LCD glyphs are drawn by lcd-display.js, so no display font is needed here */
@import url("https://fonts.cdnfonts.com/css/eurostile-mn");
@import url("https://fonts.cdnfonts.com/css/pirulen");

body {
  margin: 0;
  min-height: 100vh;
  padding: 1.5rem 1rem 3rem;
  box-sizing: border-box;
  background: #0f172a; /* deep slate */
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* Calculator and the example recorder sit side by side, stacking when narrow */
.workspace {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: center;
  gap: 2rem;
  width: 100%;
}

body > h2,
body > h5 {
  color: #f2f2f2;
  font-family: Helvetica;
  width: 100%;
  text-align: center;
}

.calculator {
  width: 18rem;
  height: 35rem;
  background: hsl(220, 9%, 32%); /* neutral graphite casing */
  border-top-left-radius: 10px;
  border-top-right-radius: 10px;
  border-bottom-left-radius: 100px 30px;
  border-bottom-right-radius: 100px 30px;
  /* stays positioned: the replay pad and nav arrows are absolute children */
  position: relative;
  flex: 0 0 auto;
  padding: 1.5rem;
  color: hsl(225, 20%, 84%);
  font-family: Helvetica;
  box-shadow: 0 0 50px 5px hsla(0, 0%, 0%, 0.5);
}

.model {
  display: block;
  text-align: right;
  /* keeps the casing spacing the removed brand labels used to occupy */
  margin-bottom: 1.7rem;
  font-size: 90%;
  font-style: italic;
  font-family: CMU;
  font-weight: 700;
}

/* The LCD is painted onto a canvas by lcd-display.js. The .indicators,
   .input and .main-display elements stay in the DOM as the source of
   truth for the renderer, but are not themselves visible. */
.screen {
  width: 100%;
  height: 5.2rem;
  background: #97ab96;
  background: linear-gradient(to bottom, #a3b6a0, #8b9f8b 65%, #93a692);
  border-radius: 5px;
  box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.45), inset 0 2px 5px rgba(0, 0, 0, 0.35),
    0 1px 0 rgba(255, 255, 255, 0.12);
  margin: 0.8em 0;
  overflow: hidden;
  position: relative;
  border: 2px solid #5a6e5d;
}

.screen .lcd {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  pointer-events: none;
}

/* Glass sheen over the finished pixels */
.screen::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(
    160deg,
    rgba(255, 255, 255, 0.14) 0%,
    rgba(255, 255, 255, 0.04) 22%,
    rgba(255, 255, 255, 0) 45%
  );
}

.screen.off {
  background: linear-gradient(to bottom, #93a695, #849682);
}

/* Not rendered, so innerText reads back exactly what was written */
.screen .indicators,
.screen .input,
.screen .main-display {
  display: none;
}

button {
  text-align: center;
  padding: 5px;
  border: 0 white none;
  box-sizing: border-box;
  color: hsl(225, 20%, 84%);
  position: relative;
  box-shadow: 2px 2px 5px 0 hsla(0, 0%, 0%, 0.75);
  transition: all 0.2s ease;
  cursor: pointer;
}

.simple-button,
.on {
  cursor: pointer;
}
.active {
  top: 2px;
  -webkit-box-shadow: inset 0 1px 0 #ffe5c4b4, inset 0 -3px 0 #161616;
  -moz-box-shadow: inset 0 1px 0 #ffe5c4b4, inset 0 -3pxpx 0 #161616;
  box-shadow: inset 0 1px 0 #ffe5c4b4, inset 0 -3px 0 #161616;
}

table {
  width: 100%;
  border-collapse: collapse;
}

td {
  text-align: center;
}

/* Trimmed to offset the taller LCD, so the replay pad stays aligned */
.modifiers {
  margin: 1.5rem 0 1.15rem 0;
}

.modifiers button {
  width: 2.35rem;
  height: 1.25rem;
  border-radius: 15px;
  position: relative;
  margin-right: 0.75rem;
  background: hsl(221, 14%, 66%);
  background: linear-gradient(to top, hsl(221, 14%, 66%), hsl(221, 14%, 71%));
}

.modifiers button::before,
.modifiers button::after {
  text-transform: uppercase;
}

.mode::before,
.on::before {
  color: hsl(225, 20%, 84%);
}

.shift {
  left: 0;
}

.alpha {
  top: 5px;
}

.mode {
  float: right;
  top: 11px;
}

.on {
  float: right;
  right: 0;
  margin-right: 0.5em !important;
}

.shift::before {
  content: "Shift";
}
.alpha::after {
  content: "Alpha";
}
.mode::before {
  content: "Mode";
  left: -9px;
}
.mode::after {
  content: "CLR";
  right: -9px;
  color: hsl(34, 68%, 72%);
}
.on::before {
  content: "ON";
}

.replay {
  background: linear-gradient(to top, hsl(221, 14%, 66%), hsl(221, 14%, 71%));
  width: 78px;
  height: 70px;
  line-height: 70px;
  position: absolute;
  left: 38%;
  top: 30%;
  border-radius: 125px;
  text-transform: uppercase;
  font-size: 9px;
  text-align: center;
  vertical-align: middle;
  box-shadow: 2px 2px 5px 0 hsla(0, 0%, 0%, 0.75);
}

button.nav {
  position: absolute;
  background: none;
  box-shadow: none;
  width: 26px;
  height: 22px;
  padding: 0;
  font-size: 11px;
  line-height: 22px;
  color: hsl(208, 30%, 22%);
  z-index: 2;
}

/* Replay pad: 78x70px circle at left 38% / top 30% */
.nav.up {
  left: calc(38% + 26px);
  top: calc(30% + 1px);
}

.nav.down {
  left: calc(38% + 26px);
  top: calc(30% + 47px);
}

.nav.left {
  left: calc(38% + 1px);
  top: calc(30% + 24px);
}

.nav.right {
  left: calc(38% + 51px);
  top: calc(30% + 24px);
}

button.nav.active {
  transform: scale(0.85);
}

.function-keys {
  margin: 1.5rem 0 0.75rem 0;
}

.function-keys button {
  background: hsl(198, 39%, 23%);
  background: linear-gradient(to top, hsl(198, 39%, 23%), hsl(198, 39%, 28%));
  font-size: small;
  width: 2.25rem;
  height: 1.5rem;
  border-radius: 5px;
}

.function-keys td {
  padding-bottom: 1rem;
  padding-right: 0.25rem;
}

/* .basic-keys {
} */
.basic-keys button {
  width: 2.5rem;
  height: 1.75rem;
  background: hsl(221, 14%, 66%);
  background: linear-gradient(to top, hsl(221, 14%, 66%), hsl(221, 14%, 71%));
  border-radius: 3px 3px 7px 7px;
}

.basic-keys td {
  padding-bottom: 1rem;
  padding-right: 0.25rem;
}

.basic-keys tr:last-child td {
  padding-bottom: 0;
}

button.pink {
  background: hsl(353, 50%, 70%);
  background: linear-gradient(to top, hsl(353, 50%, 70%), hsl(353, 50%, 75%));
}

button::before,
button::after {
  position: absolute;
  font-size: 9px;
  top: -13px;
  display: block;
  width: 100%;
  display: inline-block;
}

/* shift */
button::before {
  color: hsl(34, 68%, 72%);
  left: 0;
  text-align: left;
}

/* alpha */
button::after {
  color: hsl(353, 50%, 70%);
  right: 0;
  text-align: right;
}

.center-shift::before,
.center-alpha::after {
  text-align: center;
}

.del::before {
  content: "INS";
}
.ac::before {
  content: "OFF";
}
.reciprocal::before {
  content: "x!";
}
.combin::before {
  content: "nPr";
}
.pol::before {
  content: "Rec(";
}
.pol::after {
  content: ":";
}
.cube::before {
  content: "\221b";
}
.frac::before {
  content: "d/c";
}
.pow::before {
  content: "ˣ \221A";
}
.log::before {
  content: "10 ˣ";
}
.ln::before {
  content: "e ˣ";
}
.ln::after {
  content: "e";
}
.minus::before {
  content: "";
}
.minus::after {
  content: "A";
}
.deg::before {
  content: "\2190";
}
.deg::after {
  content: "B";
}
.hyp::after {
  content: "C";
}
.sin::before {
  content: "sin \207b\b9";
}
.cos::before {
  content: "cos \207b\b9";
}
.tan::before {
  content: "tan \207b\b9";
}
.sin::after {
  content: "D";
}
.cos::after {
  content: "E";
}
.tan::after {
  content: "F";
}
.rcl::before {
  content: "STO";
}
.eng::before {
  content: "\2190";
}
.close-paren::after {
  content: "X";
}
.comma::before {
  content: ";";
}
.comma::after {
  content: "Y";
}
.mem-plus::before {
  content: "M-";
}
.mem-plus::after {
  content: "M";
}
.zero::before {
  content: "Rnd";
}
.period::before {
  content: "Ran#";
}
.exp::before {
  content: "\03c0";
}
.ans::before {
  content: "DRG\25ba";
}
.equals::before {
  content: "%";
}
.one::before {
  content: "S-SUM";
  font-size: 8px;
  top: -10px;
}
.two::before {
  content: "S-VAR";
  font-size: 8px;
  top: -10px;
}

/* jazzy 'x' */
/* .reciprocal, .square {} */

/* ---------------------------------------------------------------
   Example recorder
   --------------------------------------------------------------- */
.recorder {
  width: 21rem;
  max-width: 100%;
  box-sizing: border-box;
  align-self: stretch;
  background: #172033;
  border: 1px solid rgba(226, 232, 240, 0.12);
  border-radius: 12px;
  padding: 1rem 1.1rem 1.2rem;
  color: hsl(225, 20%, 84%);
  font-family: Helvetica;
  font-size: 13px;
  line-height: 1.45;
}

.recorder [hidden] {
  display: none !important;
}

.rec-heading {
  margin: 0 0 0.9rem 0;
  font-size: 15px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: hsl(34, 68%, 72%);
}

.rec-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.6rem;
}

.recorder button {
  box-shadow: none;
  transition: background 0.15s ease, color 0.15s ease;
}

.rec-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: hsl(220, 9%, 32%);
  color: hsl(225, 20%, 88%);
  border: 1px solid rgba(226, 232, 240, 0.14);
  border-radius: 8px;
  padding: 0.5rem 0.85rem;
  font-family: Helvetica;
  font-size: 13px;
}

.rec-btn:hover {
  background: hsl(220, 9%, 38%);
}

.rec-btn.small {
  flex: 1 1 auto;
  justify-content: center;
  padding: 0.45rem 0.5rem;
  font-size: 12px;
}

.rec-btn.ghost {
  background: transparent;
}

.rec-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: hsl(353, 50%, 70%);
}

.recorder.is-recording .rec-btn#rec-toggle {
  background: hsl(353, 40%, 38%);
  border-color: hsl(353, 50%, 55%);
}

.recorder.is-recording .rec-dot {
  animation: rec-pulse 1s infinite;
}

@keyframes rec-pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.25;
  }
}

.rec-count {
  font-size: 12px;
  color: hsl(225, 12%, 62%);
}

.rec-naming {
  margin-bottom: 0.75rem;
}

.rec-naming input {
  width: 100%;
  box-sizing: border-box;
  background: #0f172a;
  border: 1px solid rgba(226, 232, 240, 0.18);
  border-radius: 7px;
  padding: 0.5rem 0.6rem;
  color: hsl(225, 20%, 88%);
  font-family: Helvetica;
  font-size: 13px;
}

.rec-naming input:focus {
  outline: 1px solid hsl(34, 68%, 72%);
}

.rec-naming-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.rec-save,
.rec-discard {
  border-radius: 7px;
  padding: 0.45rem 0.9rem;
  font-family: Helvetica;
  font-size: 12.5px;
  border: 1px solid transparent;
}

.rec-save {
  background: hsl(34, 68%, 72%);
  color: #2a1f0d;
}

.rec-discard {
  background: transparent;
  color: hsl(225, 12%, 62%);
  border-color: rgba(226, 232, 240, 0.16);
}

.rec-list {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.rec-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: #101a2b;
  border: 1px solid rgba(226, 232, 240, 0.08);
  border-radius: 8px;
  padding: 0.5rem 0.6rem;
}

.rec-item .rec-play-name {
  flex: 1;
  text-align: left;
  background: none;
  border: none;
  padding: 0;
  color: hsl(225, 20%, 88%);
  font-family: Helvetica;
  font-size: 13px;
}

.rec-item .rec-play-name:hover {
  color: hsl(34, 68%, 72%);
}

.rec-item .rec-steps {
  font-size: 11px;
  color: hsl(225, 12%, 55%);
}

.rec-item .rec-delete {
  background: none;
  border: none;
  padding: 0 0.2rem;
  color: hsl(225, 12%, 55%);
  font-size: 15px;
  line-height: 1;
}

.rec-item .rec-delete:hover {
  color: hsl(353, 50%, 70%);
}

.rec-empty {
  color: hsl(225, 12%, 55%);
  font-size: 12.5px;
  text-align: center;
  padding: 0.4rem 0;
}

.rec-replay {
  margin-top: 0.9rem;
  padding-top: 0.9rem;
  border-top: 1px dashed rgba(226, 232, 240, 0.16);
}

.rec-replay-title {
  color: hsl(34, 68%, 72%);
  font-weight: bold;
  margin-bottom: 0.2rem;
}

.rec-replay-step {
  min-height: 2.6em;
  font-size: 12.5px;
}

.rec-replay-dots {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin: 0.5rem 0 0.7rem;
}

.rec-replay-dots i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: rgba(226, 232, 240, 0.2);
}

.rec-replay-dots i.done {
  background: hsl(34, 68%, 72%);
}

.rec-replay-dots i.current {
  background: #fff;
  transform: scale(1.35);
}

.rec-replay-controls {
  display: flex;
  gap: 0.4rem;
}

.rec-hint {
  margin: 1rem 0 0;
  font-size: 11.5px;
  color: hsl(225, 12%, 58%);
}

.rec-hint b {
  color: hsl(225, 20%, 84%);
}

/* Key lit up by the replay */
.calculator button.rec-flash {
  box-shadow: 0 0 0 2px #fff, 0 0 14px 3px rgba(255, 255, 255, 0.6);
}

button span.sup {
  font-size: xx-small !important;
  vertical-align: super;
}

.sub {
  font-size: xx-small;
  vertical-align: bottom;
}

.xxs {
  font-size: xx-small;
}