.bg {
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  width: 100%;
  z-index: -1;
  overflow: hidden;
  background: #fafafa;
}

:root {
  --case: white;
  --case-shadow: #e1e1e1;
  --digit: #E7ECEF;
  --ink: #541E1E;

  --font-legend: "Domine", sans-serif;
  --font-lcd: "Chonburi", monospace;
}

* {
  box-sizing: border-box;
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 16px;
  background: radial-gradient(circle at 50% 10%, #eef1e6, #cfd6c3 75%);
  font-family: var(--font-legend);
}

.calc {
  width: 100%;
  max-width: 560px;
  background: linear-gradient(180deg, #FAFAFA, var(--case) 30%);
  border-radius: 34px 34px 26px 26px;
  padding: 20px 20px 26px;
  border-radius: 20px;
  box-shadow: 12px 12px 16px #bfbfbf,
    -12px -12px 16px #ffffff;
}

.screen-well {
  background: var(--case-shadow);
  border-radius: 16px;
  padding: 10px;
  margin-bottom: 16px;
}

.screen {
  position: relative;
  transform: rotateX(6deg);
  transform-origin: bottom center;
  background: radial-gradient(ellipse 130% 90% at 50% 0%, rgba(255, 255, 255, 0.260) 0%, rgba(255, 255, 255, 0.180) 45%, rgba(255, 255, 255, 0.130) 100%);
  backdrop-filter: blur(26px) saturate(180%);
  -webkit-backdrop-filter: blur(26px) saturate(180%);
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.32);
  padding: 18px 22px 34px;
  min-height: 92px;
  box-shadow: 0 14px 42px -11px rgba(0, 0, 0, 0.275), 0 1px 2px rgba(0, 0, 0, 0.138), inset 0 0 16px rgba(255, 255, 255, 0.084), inset 0 4px 8px -4px rgba(0, 0, 0, 0.060), inset 0 -1px 1px rgba(255, 255, 255, 0.132), inset 0 1px 1px rgba(255, 255, 255, 0.600), inset 0 0 0 1px rgba(255, 255, 255, 0.320);
  overflow: hidden;
  isolation: isolate;
  color: #ffffff;
}

.screen::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(ellipse 110% 65% at 50% -15%, rgba(255, 255, 255, 0.522) 0%, rgba(255, 255, 255, 0) 70%);
  opacity: 0.95;
  mix-blend-mode: screen;
  pointer-events: none;
  z-index: 1;
}

.screen::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow: inset 0 0 0 0.5px rgba(255, 255, 255, 0.470), inset 0 1px 0 rgba(255, 255, 255, 0.700), inset 0 -1px 0 rgba(255, 255, 255, 0.150);
  pointer-events: none;
  z-index: 1;
}

.screen>* {
  position: relative;
  z-index: 2;
}

.screen-glass {
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(255, 255, 255, 0.08) 0%, rgba(255, 255, 255, 0) 35%);
  pointer-events: none;
}

@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .screen {
    background: rgba(255, 255, 255, 0.630);
  }
}

.screen-mode {
  margin: 0;
  min-height: 14px;
  font-family: var(--font-lcd);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--digit);
  opacity: 0.55;
  text-align: right;
}

.screen-display {
  margin: 6px 0 0;
  font-family: var(--font-lcd);
  font-size: clamp(30px, 7vw, 44px);
  letter-spacing: 0.05em;
  color: var(--ink);
  text-align: right;
  white-space: nowrap;
  overflow: hidden;
  text-shadow: 0 0 10px rgba(231, 236, 239, 0.25);
}

.keys {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  grid-auto-rows: 1fr;
  gap: 8px 9px;
}

.key {
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  border: none;
  cursor: pointer;
  font-family: var(--font-legend);
  font-weight: 600;
  font-size: 15px;
  color: var(--ink);
  transition: transform 0.06s ease, box-shadow 0.06s ease;
}

.g2,
.g3,
.g4,
.g5,
.g6,
.g7,
.g8,
.g9,
.g10,
.g11 {
  background: #f2f2f2;
  box-shadow: 0 4px 0 #d9d9d9, 0 8px 12px -5px rgba(0, 0, 0, 0.4);
}

.key-equals {
  aspect-ratio: auto;
  border-radius: 40px;
  font-size: 22px;
  background: #541E1E !important;
  color: white !important;
  box-shadow: 0 4px 0 #300f0f, 0 8px 12px -5px rgba(0, 0, 0, 0.4) !important;
}

.key-equals {
  grid-column: 6;
  grid-row: 3 / 5;
}

.key:active,
.key.pressed {
  transform: translateY(3px);
  box-shadow: 0 0 0 transparent, 0 2px 4px -2px rgba(0, 0, 0, 0.3) !important;
}

.key:focus-visible {
  outline: 2px solid #5D80B3;
  outline-offset: 3px;
}

@media (max-width: 460px) {
  .calc {
    padding: 14px 14px 20px;
    border-radius: 26px 26px 20px 20px;
  }

  .keys {
    gap: 6px 7px;
  }

  .key {
    font-size: 12px;
  }

  .key-equals {
    font-size: 18px;
  }

  .screen-display {
    font-size: clamp(24px, 8vw, 32px);
  }
}

.video-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  overflow: hidden;
  background: #fafafa;
}

.calc:hover,
.calc:focus-visible {
  box-shadow:
    inset 4px 4px 8px #bfbfbf,
    inset -4px -4px 8px #ffffff;

  background: #f2f2f2;
  filter: none;
}

footer {
  font-family: "Domine", serif;
  color: #541e1e;
  line-height: 1;
  font-size: 0.7em;
  position: fixed;
  bottom: 20px;
  height: 30px;
  width: 100%;
  text-align: center;
  padding: 10px 0;
}

.botao-flutuante {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 1000;
}

.botao-flutuante .lista {
  display: none;
  position: absolute;
  bottom: 60px;
  right: 0;
  flex-direction: column;
  gap: 10px;
  min-width: 180px;
}

.botao-flutuante .lista.aberto {
  display: flex;
}

.icon {
  color: #541e1e;
}

.item {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 10px;
  background-color: rgba(242, 242, 242, 0.95);
  box-shadow: -8px -8px 15px white, 8px 8px 15px rgba(163, 177, 198, .35);
  padding: 12px 15px;
  border-radius: 5px;
}

a {
  text-decoration: none;
  color: #541e1e;
  font-family: "Domine", serif;
}

.botao {
  display: flex;
}

button {
  border: none;
  cursor: pointer;
  border-radius: 30px;
  background: #f2f2f2;
  box-shadow: -8px -8px 15px white, 8px 8px 15px rgba(163, 177, 198, .35);
  transition: filter 0.8s ease, transform 0.2s ease;
  position: relative;
  padding: 5px;
}

button .icon {
  padding: 3px;
  display: flex;
  align-items: center;
}

#butao:active {
  box-shadow: inset -5px -5px 10px white, inset 5px 5px 10px rgba(163, 177, 198, .35);
}