:host {
  display: block;
  container-type: inline-size;
}

.keypad {
  background: var(--calc-surface-soft);
  color: var(--calc-text);
  display: flex;
  flex-direction: column;
  gap: clamp(8px, 2cqi, 14px);
  height: 100%;
  padding: clamp(10px, 2.5cqi, 18px);
}

.keypad-header {
  align-items: baseline;
  display: flex;
  justify-content: space-between;
}

.keypad-header strong {
  font-size: clamp(0.95rem, 3.4cqi, 1.2rem);
}

.keypad-header span {
  color: var(--calc-text-muted);
  font-size: clamp(0.76rem, 2.6cqi, 0.92rem);
}

.tabs {
  background: var(--calc-control-muted);
  border: 1px solid var(--calc-border);
  border-radius: 8px;
  display: grid;
  gap: clamp(2px, 0.8cqi, 3px);
  grid-template-columns: repeat(4, minmax(0, 1fr));
  padding: clamp(2px, 0.8cqi, 3px);
}

.base-control {
  align-items: center;
  border: 0;
  display: flex;
  gap: 8px;
  justify-content: space-between;
  margin: 0;
  min-width: 0;
  padding: 0;
}

.base-control[hidden] {
  display: none;
}

.base-control legend {
  color: var(--calc-control-muted-text);
  float: left;
  font-size: clamp(0.76rem, 2.5cqi, 0.9rem);
  font-weight: 600;
  line-height: clamp(28px, 8.5cqi, 36px);
  padding: 0;
}

.base-options {
  background: var(--calc-control-muted);
  border: 1px solid var(--calc-border);
  border-radius: 7px;
  display: grid;
  flex: 1 1 auto;
  gap: 2px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  min-width: 0;
  padding: 2px;
}

.base-options label {
  align-items: center;
  border: 1px solid transparent;
  border-radius: 5px;
  color: var(--calc-text);
  cursor: pointer;
  display: inline-flex;
  font:
    650 clamp(0.7rem, 2.6cqi, 0.86rem) / 1 system-ui,
    sans-serif;
  height: clamp(28px, 8.5cqi, 36px);
  justify-content: center;
  min-width: 0;
  padding: 0 4px;
}

.base-options input {
  appearance: none;
  height: 0;
  margin: 0;
  position: absolute;
  width: 0;
}

.base-options label:has(input:checked) {
  background: var(--calc-control-active);
  border-color: var(--calc-border-strong);
  box-shadow: 0 1px 2px rgb(16 24 40 / 10%);
  color: var(--calc-control-text);
}

.keys {
  display: grid;
  gap: clamp(6px, 1.9cqi, 10px);
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.keys[data-layout='compact'] {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

button {
  align-items: center;
  aspect-ratio: 1.08;
  background: var(--calc-surface);
  border: 1px solid var(--calc-border);
  border-radius: 7px;
  color: inherit;
  cursor: pointer;
  display: inline-flex;
  font:
    600 clamp(0.86rem, 4.6cqi, 1.2rem) / 1.1 system-ui,
    sans-serif;
  justify-content: center;
  min-height: clamp(40px, 14cqi, 66px);
  min-width: 0;
  padding: 0;
}

.tab {
  aspect-ratio: auto;
  border-color: transparent;
  border-radius: 6px;
  color: var(--calc-control-muted-text);
  font-size: clamp(0.78rem, 3.3cqi, 1rem);
  height: clamp(30px, 9.5cqi, 40px);
  min-height: 0;
}

.tab[aria-selected='true'] {
  background: var(--calc-control-active);
  border-color: var(--calc-border-strong);
  box-shadow: 0 1px 2px rgb(16 24 40 / 10%);
  color: var(--calc-control-text);
}

.key:hover,
.tab:hover {
  background: var(--calc-control);
  border-color: var(--calc-border-strong);
}

.key:disabled {
  background: var(--calc-control-muted);
  border-color: var(--calc-border);
  color: var(--calc-control-muted-text);
  cursor: not-allowed;
  opacity: 0.58;
}

.key:active,
.tab:active {
  transform: translateY(1px);
}

.key[data-kind='operation'] {
  background: var(--calc-operation);
}

.key[data-kind='command'] {
  background: linear-gradient(
    to bottom,
    var(--color-button-background-to) 5%,
    var(--color-button-background-from) 100%
  );
  background-color: var(--color-button-background-to);
  border: 1px outset var(--color-button-border);
  box-shadow: 0 10px 14px -7px var(--color-button-box-shadow);
  color: var(--color-button-text);
  text-shadow: 0 1px 0 var(--color-button-text-shadow);
}

.key[data-kind='command']:hover {
  background: linear-gradient(
    to bottom,
    var(--color-button-background-from) 5%,
    var(--color-button-background-to) 100%
  );
  background-color: var(--color-button-background-from);
}

.key[data-wide='true'] {
  aspect-ratio: auto;
  grid-column: span 2;
  min-height: clamp(40px, 12cqi, 58px);
}

@media (orientation: portrait) {
  .keypad {
    gap: clamp(2px, 0.35svh, 4px);
    height: auto;
    padding: clamp(3px, 0.55svh, 6px);
  }

  .keys {
    gap: clamp(2px, 0.35svh, 3px);
  }

  button {
    aspect-ratio: auto;
    font-size: clamp(0.84rem, 3.2vw, 1.08rem);
    height: clamp(24px, 4.6svh, 36px);
    min-height: 0;
  }

  .key[data-wide='true'] {
    height: clamp(24px, 4.6svh, 36px);
    min-height: 0;
  }

  .tab {
    height: clamp(20px, 3svh, 26px);
  }

  .base-control {
    gap: 6px;
  }

  .base-control legend {
    line-height: clamp(22px, 3.4svh, 28px);
  }

  .base-options label {
    font-size: clamp(0.68rem, 2.8vw, 0.8rem);
    height: clamp(22px, 3.4svh, 28px);
  }
}

@media (orientation: landscape) and (max-height: 520px) {
  .keypad-header {
    display: none;
  }

  button {
    aspect-ratio: 1.35;
    font-size: clamp(0.74rem, 3.2cqi, 0.95rem);
    min-height: clamp(22px, 8cqi, 34px);
  }

  .key[data-wide='true'] {
    min-height: clamp(22px, 8cqi, 34px);
  }
}