/* Calculator — expression line, history, responsive grid */

.vault-calc {
  max-width: 280px;
  margin: 0 auto;
}
.vault-calc__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}
.vault-calc__header .vault-card__title {
  margin: 0;
}
.vault-calc__history-btn {
  padding: 0.35rem 0.6rem;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--vault-primary);
  background: var(--vault-bg);
  border: 1px solid var(--vault-border);
  border-radius: 0.375rem;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}
.vault-calc__history-btn:hover {
  background: var(--vault-bg-elevated);
  border-color: var(--vault-primary);
}
.vault-calc__history-btn--icon {
  padding: 0.4rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
.vault-calc__history-icon {
  width: 1.15rem;
  height: 1.15rem;
  display: block;
}
.vault-calc__history-toolbar {
  display: flex;
  justify-content: flex-end;
  padding: 0.25rem 0 0.35rem;
  margin-bottom: 0.15rem;
  border-bottom: 1px solid var(--vault-border);
}
.vault-calc__clear-history-btn {
  padding: 0.25rem 0.5rem;
  font-size: 0.75rem;
  color: var(--vault-text-muted);
  background: transparent;
  border: none;
  border-radius: 0.25rem;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.vault-calc__clear-history-btn:hover {
  background: var(--vault-bg-elevated);
  color: var(--vault-text);
}
.vault-calc__body {
  position: relative;
  min-height: 320px;
}
.vault-calc__panel {
  min-height: 320px;
  display: flex;
  flex-direction: column;
  transition: opacity 0.15s;
}
.vault-calc__panel--hidden {
  display: none;
}
.vault-calc__panel--history {
  overflow: hidden;
  flex-direction: column;
}
.vault-calc__panel--history .vault-calc__history {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}
.vault-calc__history-empty {
  margin: 0;
  padding: 1rem 0.5rem;
  font-size: 0.9rem;
  color: var(--vault-text-muted);
  text-align: center;
}
.vault-calc__history-btn--active {
  background: var(--vault-primary-light);
  border-color: var(--vault-primary);
  color: var(--vault-primary);
}
.vault-calc__history {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}
.vault-calc__history-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0;
  font-size: 0.8rem;
  text-align: left;
  border-radius: 0.25rem;
  color: var(--vault-text-muted);
}
.vault-calc__history-expr-btn {
  flex: 1;
  min-width: 0;
  padding: 0.4rem 0.5rem;
  font-size: inherit;
  text-align: left;
  background: transparent;
  border: none;
  border-radius: 0.25rem;
  color: inherit;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.vault-calc__history-expr-btn:hover {
  background: var(--vault-bg-elevated);
  color: var(--vault-text);
}
.vault-calc__history-expr {
  display: block;
  word-break: break-word;
  white-space: normal;
  font-variant-numeric: tabular-nums;
  text-align: left;
}
.vault-calc__history-result {
  flex-shrink: 0;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--vault-primary);
}
.vault-calc__history-result-copyable {
  flex-shrink: 0;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  padding: 0.25rem 0.4rem;
}
.vault-calc__history-result-copyable .vault-copyable__text {
  color: var(--vault-primary);
  max-width: none;
  white-space: nowrap;
}
.vault-calc__expression {
  width: 100%;
  padding: 0.35rem 0.5rem 0;
  font-size: 0.9rem;
  font-weight: 400;
  text-align: right;
  color: var(--vault-text-muted);
  min-height: 1.4em;
  word-break: break-all;
}
.vault-calc__display-wrap {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  margin-bottom: 0.5rem;
  min-height: 2.5rem;
}
.vault-calc__display-wrap .vault-calc__display-copyable {
  flex: 1;
  min-width: 0;
  padding: 0.75rem 0.5rem;
  font-size: 1.5rem;
  font-weight: 500;
  text-align: right;
  justify-content: flex-end;
  flex-direction: row-reverse;
  border: 1px solid var(--vault-border);
  border-radius: 0.375rem;
  background: var(--vault-bg);
}
.vault-calc__display-wrap .vault-calc__display-copyable .vault-copyable__text {
  flex: 1;
  min-width: 0;
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--vault-text);
  max-width: none;
  text-align: right;
}
.vault-calc__history-result-copyable {
  flex-direction: row-reverse;
}
.vault-calc__display {
  width: 100%;
  padding: 0.75rem 0.5rem;
  margin-bottom: 0.5rem;
  font-size: 1.5rem;
  font-weight: 500;
  text-align: right;
  color: var(--vault-text);
  background: var(--vault-bg);
  border: 1px solid var(--vault-border);
  border-radius: 0.375rem;
  min-height: 2.5rem;
  word-break: break-all;
}
.vault-calc__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.35rem;
}
.vault-calc__btn {
  padding: 0.6rem 0.4rem;
  font-size: 1rem;
  font-weight: 500;
  border: 1px solid var(--vault-border);
  border-radius: 0.375rem;
  background: var(--vault-bg-elevated);
  color: var(--vault-text);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}
.vault-calc__btn:hover {
  background: var(--vault-border);
  border-color: var(--vault-text-subtle);
}
.vault-calc__btn:active {
  transform: scale(0.98);
}
.vault-calc__btn--num {
  background: var(--vault-bg);
}
.vault-calc__btn--op {
  background: var(--vault-bg);
  color: var(--vault-primary);
}
.vault-calc__btn--mem {
  font-size: 0.75rem;
  background: var(--vault-bg);
  color: var(--vault-text-muted);
}
.vault-calc__btn--eq {
  background: var(--vault-primary);
  color: #fff;
  border-color: var(--vault-primary);
}
.vault-calc__btn--eq:hover {
  background: var(--vault-primary-hover);
  border-color: var(--vault-primary-hover);
}
.vault-calc__btn--wide {
  grid-column: span 2;
}

@media (min-width: 360px) {
  .vault-calc {
    max-width: 320px;
  }
  .vault-calc__display {
    font-size: 1.75rem;
    padding: 0.85rem 0.6rem;
  }
  .vault-calc__display-wrap .vault-calc__display-copyable,
  .vault-calc__display-wrap .vault-calc__display-copyable .vault-copyable__text {
    font-size: 1.75rem;
  }
  .vault-calc__display-wrap .vault-calc__display-copyable {
    padding: 0.85rem 0.6rem;
  }
  .vault-calc__btn {
    padding: 0.7rem;
    font-size: 1.1rem;
  }
}