.calc-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  padding: 20px 24px 60px;
  align-items: start;
}

@media (max-width: 900px) {
  .calc-wrap { grid-template-columns: 1fr; }
}

.calc-col {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.calc-card {
  background: var(--card);
  border: 1px solid var(--border-strong);
  border-radius: 0;
  padding: 18px 20px;
  box-shadow: none;
}

.calc-card h2 {
  margin: -18px -20px 16px;
  padding: 12px 20px;
  font-size: 14px;
  font-weight: 600;
  background: var(--ribbon);
  border-bottom: 1px solid var(--border);
}

.calc-card h3 {
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin: 18px 0 8px;
}

#calcForm label,
.calc-settings label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 12px;
}

#calcForm input[type="number"],
#calcForm select,
.calc-settings input[type="number"] {
  display: block;
  width: 100%;
  margin-top: 4px;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 2px;
  font-size: 13px;
  color: var(--text);
  background: var(--card);
  font-family: inherit;
}

#calcForm input:focus, #calcForm select:focus, .calc-settings input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 1px var(--primary);
}

.calc-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.calc-result h2 { margin-bottom: 14px; }

.calc-breakdown {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 18px;
  font-size: 13px;
}

.calc-breakdown .row {
  display: flex;
  justify-content: space-between;
  padding: 6px 0;
  border-bottom: 1px solid var(--border);
}

.calc-breakdown .row.discount { color: var(--green); }

.calc-total-box {
  background: var(--primary);
  border-radius: 0;
  padding: 16px 18px;
  color: white;
}

.calc-total-label {
  font-size: 11px;
  opacity: 0.9;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin-top: 10px;
}

.calc-total-label:first-child { margin-top: 0; }

.calc-total-value {
  font-size: 24px;
  font-weight: 700;
}

.calc-total-value-vat { font-size: 18px; opacity: 0.95; }

.calc-per-unit {
  margin-top: 10px;
  font-size: 12px;
  opacity: 0.9;
  border-top: 1px solid rgba(255,255,255,0.3);
  padding-top: 10px;
}

.calc-settings summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 13px;
  list-style: none;
}

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

.calc-hint {
  font-size: 12px;
  color: var(--muted);
  margin: 10px 0 4px;
}

.paper-rate-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.paper-rate-row span {
  flex: 1;
  font-size: 12px;
}

.paper-rate-row input {
  width: 110px;
  padding: 5px 8px;
  border: 1px solid var(--border);
  border-radius: 2px;
  background: var(--card);
  color: var(--text);
  font-family: inherit;
}