:root {
  color-scheme: dark;
  font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  font-synthesis: none;
  --background: #21071b;
  --panel: #2c0824;
  --input: #340a2b;
  --text: #f5edf3;
  --muted: #a7899e;
  --line: #542044;
  --result: #67b8e8;
  --accent: #c2b600;
  --focus: #d4c800;
  --error: #ff6c73;
  --calculator-font: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --calculator-size: 1.5rem;
}

:root[data-calculator-font="sans"] {
  --calculator-font: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

:root[data-calculator-font="serif"] {
  --calculator-font: "Iowan Old Style", "Palatino Linotype", Palatino, serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-width: 320px;
  min-height: 100%;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background: var(--background);
}

button,
input {
  font: inherit;
}

.calculator-shell {
  display: flex;
  flex-direction: column;
  width: min(960px, 100%);
  height: 100vh;
  min-height: 420px;
  margin: 0 auto;
  background: var(--panel);
}

.history-panel {
  position: relative;
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  scrollbar-color: var(--line) transparent;
}

.history-heading {
  position: sticky;
  z-index: 1;
  top: 0;
  display: flex;
  justify-content: flex-end;
  min-height: 40px;
  padding: 8px 12px;
  background: linear-gradient(var(--panel) 55%, transparent);
}

.toolbar {
  display: flex;
  align-items: flex-start;
  gap: 2px;
}

.text-button {
  align-self: flex-start;
  padding: 4px 7px;
  border: 0;
  border-radius: 3px;
  color: var(--muted);
  background: transparent;
  cursor: pointer;
  font-size: 0.72rem;
}

.text-button:hover,
.text-button:focus-visible,
.settings summary:hover,
.settings summary:focus-visible {
  color: var(--text);
  outline: 1px solid var(--focus);
  outline-offset: 1px;
}

.settings {
  position: relative;
}

.settings summary {
  padding: 4px 7px;
  border-radius: 3px;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.72rem;
  list-style: none;
}

.settings summary::-webkit-details-marker {
  display: none;
}

.settings-panel {
  position: absolute;
  z-index: 4;
  top: calc(100% + 7px);
  right: 0;
  width: min(300px, calc(100vw - 24px));
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: #26081f;
  box-shadow: 0 12px 30px rgb(8 0 6 / 45%);
}

.setting-row {
  display: grid;
  grid-template-columns: 5.5rem minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  min-height: 34px;
  color: var(--muted);
  font-size: 0.76rem;
}

.setting-row select {
  width: 100%;
  padding: 5px 7px;
  border: 1px solid var(--line);
  border-radius: 3px;
  color: var(--text);
  background: var(--input);
  font: inherit;
}

.credits {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.62rem;
  line-height: 1.45;
}

.history-list {
  margin: 0;
  padding: 12px clamp(18px, 4vw, 40px) 28px;
  list-style: none;
}

.history-list li + li {
  margin-top: 24px;
}

.history-entry {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: start;
  width: 100%;
  color: var(--text);
  font-family: var(--calculator-font);
  text-align: left;
}

.history-content {
  min-width: 0;
  cursor: text;
  user-select: text;
  -webkit-user-select: text;
}

.history-reuse {
  width: 28px;
  height: 28px;
  padding: 0;
  border: 0;
  border-radius: 3px;
  color: var(--muted);
  background: transparent;
  cursor: pointer;
  font-size: 1rem;
  opacity: 0.6;
}

.history-reuse:hover,
.history-reuse:focus-visible {
  color: var(--text);
  outline: 1px solid var(--focus);
  outline-offset: 1px;
  opacity: 1;
}

.history-expression,
.history-result {
  display: block;
  overflow-wrap: anywhere;
  font-size: var(--calculator-size);
  line-height: 1.45;
  user-select: text;
  -webkit-user-select: text;
}

.history-expression {
  color: var(--text);
}

.history-result {
  color: var(--result);
  font-variant-numeric: tabular-nums;
}

.history-result::before {
  color: var(--accent);
  content: "= ";
}

.empty-history {
  position: absolute;
  inset: 50% 20px auto;
  color: var(--muted);
  font-size: 0.82rem;
  text-align: center;
  transform: translateY(-50%);
}

.workbench {
  position: relative;
  z-index: 2;
  flex: none;
  padding: 14px clamp(18px, 4vw, 40px) 12px;
  border-top: 1px solid var(--line);
  background: var(--input);
  box-shadow: 0 -16px 32px rgb(14 0 11 / 24%);
}

.autocomplete {
  position: absolute;
  right: clamp(18px, 4vw, 40px);
  bottom: calc(100% - 1px);
  left: clamp(18px, 4vw, 40px);
  max-height: min(250px, 42vh);
  overflow-y: auto;
  border: 1px solid var(--line);
  border-radius: 4px 4px 0 0;
  background: #26081f;
  box-shadow: 0 -12px 28px rgb(8 0 6 / 35%);
}

.autocomplete[hidden] {
  display: none;
}

#autocomplete-list {
  margin: 0;
  padding: 4px;
  list-style: none;
}

.autocomplete-option {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 7px 9px;
  border: 0;
  border-radius: 2px;
  color: var(--text);
  background: transparent;
  font-family: var(--calculator-font);
  text-align: left;
  cursor: pointer;
}

.autocomplete-option:hover,
.autocomplete-option:focus-visible,
.autocomplete-option.is-active {
  outline: none;
  background: var(--line);
}

.autocomplete-kind {
  color: var(--muted);
  font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  font-size: 0.68rem;
}

#autocomplete-help {
  padding: 6px 12px 8px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.65rem;
}

#result {
  display: block;
  min-height: 1.45em;
  margin-bottom: 6px;
  overflow-wrap: anywhere;
  color: var(--result);
  font-family: var(--calculator-font);
  font-size: var(--calculator-size);
  line-height: 1.45;
  font-variant-numeric: tabular-nums;
}

#result:empty {
  display: none;
}

#result.is-preview {
  opacity: 0.78;
}

#result::first-letter {
  color: var(--accent);
}

.expression-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  align-items: center;
}

.prompt {
  color: var(--accent);
  font-family: var(--calculator-font);
  font-size: var(--calculator-size);
  line-height: 1;
}

#expression {
  display: block;
  width: 100%;
  padding: 4px 0 7px;
  border: 0;
  border-bottom: 1px solid transparent;
  border-radius: 0;
  outline: none;
  color: var(--text);
  background: transparent;
  caret-color: var(--text);
  font-family: var(--calculator-font);
  font-size: var(--calculator-size);
}

#expression:focus {
  border-color: var(--focus);
}

#expression[aria-invalid="true"] {
  border-color: var(--error);
}

.error-message {
  min-height: 1.25em;
  margin: 5px 0 0 26px;
  color: var(--error);
  font-size: 0.8rem;
}

.input-help {
  margin: 5px 0 0 26px;
  color: var(--muted);
  font-size: 0.68rem;
}

kbd {
  color: var(--text);
  font-family: inherit;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-height: 520px) {
  .input-help {
    display: none;
  }
}

@media (max-width: 520px) {
  .history-heading {
    min-height: 34px;
  }

  .history-list {
    padding-top: 6px;
  }

  .history-list li + li {
    margin-top: 18px;
  }
}