/* Calculator module */

.calc-page {
  --calc-purple: #7c3aed;
  --calc-purple-soft: #ede9fe;
  --calc-purple-line: #ddd6fe;
  --calc-ink: #18181d;
  --calc-muted: #9494a3;
  --calc-surface: #fff;
  --calc-bg: #f4f5f8;
  --calc-border: rgba(24, 24, 29, 0.09);
  --calc-radius: 14px;
  font-family: 'Vazirmatn', Tahoma, sans-serif;
  color: var(--calc-ink);
}

.calc-page--embed {
  background: transparent;
}

.calc-shell {
  width: min(400px, 100%);
  margin: 0 auto;
  padding: 16px;
  border-radius: 20px;
  border: 1px solid var(--calc-border);
  background: var(--calc-surface);
  box-shadow: 0 8px 32px rgba(24, 24, 29, 0.06);
}

.calc-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 12px;
}

.calc-modes {
  display: flex;
  gap: 6px;
  padding: 4px;
  border-radius: 12px;
  background: var(--calc-bg);
}

.calc-mode {
  flex: 1;
  min-width: 72px;
  height: 34px;
  border: 0;
  border-radius: 9px;
  background: transparent;
  font: inherit;
  font-size: 12px;
  font-weight: 700;
  color: var(--calc-muted);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.calc-mode.is-active {
  background: var(--calc-surface);
  color: var(--calc-purple);
  box-shadow: 0 2px 8px rgba(24, 24, 29, 0.06);
}

.calc-angle {
  height: 34px;
  padding: 0 12px;
  border: 1px solid var(--calc-purple-line);
  border-radius: 9px;
  background: var(--calc-purple-soft);
  font: inherit;
  font-size: 11px;
  font-weight: 800;
  color: var(--calc-purple);
  cursor: pointer;
}

.calc-display {
  padding: 14px 12px;
  margin-bottom: 12px;
  border-radius: var(--calc-radius);
  background: var(--calc-bg);
  min-height: 88px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 6px;
}

.calc-display__expr {
  min-height: 20px;
  font-size: 13px;
  color: var(--calc-muted);
  word-break: break-all;
  line-height: 1.4;
}

.calc-display__result {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.02em;
  word-break: break-all;
  line-height: 1.2;
}

.calc-display.is-error .calc-display__result {
  font-size: 14px;
  color: #dc2626;
}

.calc-pad {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.calc-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.calc-row--eng {
  grid-template-columns: repeat(5, 1fr);
}

.calc-key {
  height: 48px;
  border: 1px solid var(--calc-border);
  border-radius: 12px;
  background: var(--calc-surface);
  font: inherit;
  font-size: 16px;
  font-weight: 700;
  color: var(--calc-ink);
  cursor: pointer;
  transition: background 0.12s, transform 0.12s;
  user-select: none;
}

.calc-key:active {
  transform: scale(0.96);
}

.calc-key--op {
  color: var(--calc-purple);
  background: var(--calc-purple-soft);
  border-color: var(--calc-purple-line);
}

.calc-key--eq {
  background: var(--calc-purple);
  border-color: var(--calc-purple);
  color: #fff;
}

.calc-key--muted {
  color: var(--calc-muted);
  background: var(--calc-bg);
}

.calc-row--eq .calc-key--eq {
  width: 100%;
  height: 52px;
  font-size: 18px;
}

@media (max-width: 380px) {
  .calc-key {
    height: 44px;
    font-size: 14px;
  }

  .calc-display__result {
    font-size: 24px;
  }
}