:root {
  color-scheme: dark;
  --bg-color: #212429;
  --cont-color: #34383e;
  --gris: #777;
  --white: #fff;
  --display: #a4c6a5;
  --btn-action: #b74d6c;
  --git-chendo: #fd3938;
  font-family: Arial, Helvetica, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  -webkit-tap-highlight-color: transparent;
}

body {
  min-height: 100vh;
  min-height: 100dvh;
  margin: 0;
  padding: 24px 12px;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: var(--bg-color);
  user-select: none;
}

.container-all {
  width: 100%;
}

.site-header {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  width: min(22rem, 100%);
  min-height: 34px;
  margin: 0 auto 10px;
}

h1 {
  display: flex;
  grid-column: 2;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin: 0;
  color: var(--white);
  font-size: 1.4rem;
}

.app-version {
  grid-column: 3;
  justify-self: end;
  color: var(--display);
  font-size: 0.8rem;
  font-variant-numeric: tabular-nums;
}

.creator-mark {
  display: none;
  grid-column: 3;
  justify-self: end;
  width: 32px;
  height: 32px;
  border-radius: 50%;
}

.creator-mark img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.creator-mark:focus-visible {
  outline: 2px solid var(--display);
  outline-offset: 3px;
}

i.fa-github {
  color: var(--git-chendo);
}

h1 a {
  color: #ccc;
  text-decoration: none;
}

.back-op {
  width: min(22rem, 100%);
  margin: 0 auto;
  padding: 12px;
  border: 1px solid var(--gris);
  border-radius: 8px;
  background-color: var(--cont-color);
  box-shadow: 2px 2px 8px rgb(0 0 0 / 55%);
  transition: opacity 160ms ease;
}

.back-op.is-off {
  opacity: 0.55;
}

.field-name {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 28px;
}

.field-name p {
  margin: 0;
  color: var(--white);
}

.field-name span,
.angle-mode {
  color: var(--display);
}

.field-result {
  min-width: 0;
  height: 76px;
  padding: 8px 10px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: stretch;
  overflow: hidden;
  background-color: var(--display);
  color: #111;
  font-variant-numeric: tabular-nums;
}

.show-op {
  min-width: 0;
  overflow-x: auto;
  color: #26362c;
  font-size: 0.95rem;
  text-align: right;
  white-space: nowrap;
  scrollbar-width: thin;
}

.show-result {
  min-height: 1.3em;
  overflow: hidden;
  color: #101710;
  font-size: 1.35rem;
  font-weight: 700;
  text-align: right;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.show-result.error {
  color: #8b172f;
  font-size: 0.95rem;
}

.container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  margin: 14px 0;
}

.btn-column {
  display: flex;
  flex: 0 0 auto;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.btn-column span {
  min-height: 0.8em;
  color: var(--white);
  font-size: 0.6rem;
  text-align: center;
}

.btn-column .angle-mode {
  color: var(--display);
}

.btn,
.btn-replay,
.btn-cs,
.btn-math {
  border: 1px solid #73777c;
  background-color: var(--cont-color);
  box-shadow: 1px 2px 2px #000;
  color: var(--white);
  font: inherit;
  cursor: pointer;
  touch-action: manipulation;
}

.btn:hover,
.btn-replay:hover,
.btn-cs:hover,
.btn-math:hover {
  filter: brightness(1.2);
}

.btn:active,
.btn-replay:active,
.btn-cs:active,
.btn-math:active {
  transform: translateY(1px);
  background-color: var(--bg-color);
}

.btn:focus-visible,
.btn-replay:focus-visible,
.btn-cs:focus-visible,
.btn-math:focus-visible {
  outline: 2px solid var(--display);
  outline-offset: 2px;
}

button:disabled {
  cursor: not-allowed;
}

button.btn {
  width: 34px;
  height: 22px;
  padding: 0;
  border-radius: 12px;
}

.btn-replay {
  min-width: 72px;
  height: 42px;
  padding: 0 8px;
  border-radius: 22px 22px 30px 30px;
  font-size: 0.7rem;
}

.container-one {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  margin: 0 -2px 6px;
}

.btn-cs {
  min-width: 0;
  min-height: 36px;
  margin: 3px 2px;
  padding: 2px;
  border-radius: 5px;
  font-size: clamp(0.66rem, 3vw, 0.8rem);
}

.btn-cs.opacity {
  visibility: hidden;
}

.container-two {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.btn-math {
  min-width: 0;
  min-height: 42px;
  margin: 3px;
  padding: 5px;
  border-radius: 7px 0;
  font-size: 0.95rem;
}

.btn-action {
  background-color: var(--btn-action);
}

.shift-active [data-action="shift"],
.alpha-active [data-action="alpha"],
.hyp-active [data-action="hyp"] {
  border-color: var(--display);
  color: var(--display);
}

@media (max-width: 360px) {
  .back-op {
    padding: 9px;
  }

  .container {
    gap: 4px;
  }

  .btn-replay {
    min-width: 62px;
    font-size: 0.62rem;
  }

  .btn-math {
    margin: 2px;
  }
}

@media (max-width: 1100px) {
  html,
  body {
    width: 100%;
    min-width: 320px;
    height: 100%;
    min-height: 100%;
    overflow: hidden;
  }

  body {
    height: 100vh;
    height: 100dvh;
    padding: 0;
    align-items: stretch;
  }

  .container-all {
    display: flex;
    flex: 1 1 auto;
    flex-direction: column;
    width: 100%;
    min-width: 0;
    min-height: 0;
  }

  .site-header {
    display: flex;
    flex: 0 0 auto;
    justify-content: flex-start;
    width: 100%;
    min-height: calc(42px + env(safe-area-inset-top));
    margin: 0;
    padding: env(safe-area-inset-top) max(14px, env(safe-area-inset-left)) 0;
    background-color: var(--bg-color);
  }

  .site-header h1 {
    display: none;
  }

  .creator-mark {
    display: block;
    width: 30px;
    height: 30px;
    margin-left: auto;
  }

  .app-version {
    color: var(--display);
    font-size: 0.95rem;
    font-weight: 700;
  }

  .back-op {
    display: grid;
    flex: 1 1 auto;
    grid-template-rows: auto auto auto minmax(0, 1fr) minmax(0, 1fr);
    gap: clamp(5px, 1.2dvh, 10px);
    width: 100%;
    max-width: none;
    min-width: 0;
    min-height: 0;
    margin: 0;
    padding: max(8px, env(safe-area-inset-bottom)) max(8px, env(safe-area-inset-right)) max(8px, env(safe-area-inset-bottom)) max(8px, env(safe-area-inset-left));
    overflow: hidden;
    border: 0;
    border-radius: 0;
    box-shadow: none;
  }

  .field-name {
    min-height: 20px;
  }

  .field-name p {
    font-size: 0.85rem;
  }

  .field-result {
    height: auto;
    min-height: 58px;
    padding: 7px 10px;
  }

  .container {
    min-height: 0;
    margin: 0;
    gap: clamp(4px, 2vw, 12px);
  }

  .container-one,
  .container-two {
    min-height: 0;
    margin: 0;
    gap: clamp(4px, 1.4vw, 10px);
  }

  .container-one {
    grid-template-rows: repeat(4, minmax(0, 1fr));
  }

  .container-two {
    grid-template-rows: repeat(4, minmax(0, 1fr));
  }

  .btn-cs,
  .btn-math {
    height: 100%;
    min-height: 0;
    max-height: clamp(42px, 7dvh, 72px);
    align-self: center;
    margin: 0;
    padding: 2px;
    font-size: clamp(0.72rem, 2.6vw, 1.05rem);
  }

  .btn-column {
    height: 100%;
    justify-content: center;
  }

  .btn-column span {
    font-size: clamp(0.58rem, 1.8vw, 0.72rem);
  }

  button.btn {
    width: clamp(34px, 8vw, 48px);
    height: clamp(24px, 5.5dvh, 34px);
  }

  .btn-replay {
    min-width: clamp(62px, 17vw, 90px);
    height: clamp(34px, 7dvh, 46px);
  }
}

@media (max-width: 1100px) and (orientation: landscape) {
  .back-op {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-template-rows: auto auto auto minmax(0, 1fr);
  }

  .field-name,
  .field-result,
  .container {
    grid-column: 1 / -1;
  }

  .container-one,
  .container-two {
    grid-row: 4;
  }

  .container-one {
    grid-column: 1;
  }

  .container-two {
    grid-column: 2;
  }

  .site-header {
    min-height: calc(34px + env(safe-area-inset-top));
  }

  .field-result {
    min-height: 48px;
  }

  .btn-column span {
    font-size: 0.58rem;
  }

  button.btn {
    height: clamp(30px, 8dvh, 36px);
  }

  .btn-replay {
    height: clamp(34px, 9dvh, 40px);
  }
}

@media (max-width: 700px) and (max-height: 360px) and (orientation: landscape) {
  .site-header {
    min-height: calc(28px + env(safe-area-inset-top));
  }

  .back-op {
    gap: 4px;
    padding: max(6px, env(safe-area-inset-bottom)) max(6px, env(safe-area-inset-right)) max(6px, env(safe-area-inset-bottom)) max(6px, env(safe-area-inset-left));
  }

  .field-name {
    display: none;
  }

  .field-result {
    min-height: 42px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}