/* ========== Calculator Layout ========== */
.calc-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 28px;
}

.calc-panel {
  background: linear-gradient(180deg, var(--color-bg-card) 0%, var(--color-bg-secondary) 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.calc-panel-old {
  border-top: 3px solid var(--color-accent-secondary);
}

.calc-panel-new {
  border-top: 3px solid var(--color-accent-warning);
}

.calc-panel-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}
.calc-panel-header h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-text-primary);
}

.calc-panel-badge {
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  color: #000;
}
.badge-old {
  background: linear-gradient(180deg, var(--color-accent-secondary), #5d8a9a);
}
.badge-new {
  background: linear-gradient(180deg, var(--color-accent-warning), #e06020);
  color: #fff;
}

.calc-field {
  margin-bottom: 16px;
}
.calc-field label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-label);
  margin-bottom: 6px;
}

.calc-input,
.spec-input {
  width: 100%;
  padding: 10px 14px;
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-size: 15px;
  font-family: var(--font-family-display);
  transition: border-color 0.2s;
}
.calc-input:focus,
.spec-input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px rgba(255, 198, 41, 0.15);
}

.spec-picker {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.spec-picker span {
  color: var(--color-text-muted);
  font-weight: 700;
}
.spec-select {
  padding: 10px 8px;
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-size: 14px;
  font-family: var(--font-family-display);
  min-width: 70px;
}
.spec-select:focus {
  outline: none;
  border-color: var(--color-accent);
}
.spec-picker .spec-input {
  flex: 1;
  min-width: 120px;
}

/* ========== Results ========== */
.calc-result {
  background: linear-gradient(180deg, var(--color-bg-card) 0%, var(--color-bg-secondary) 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  min-height: 100px;
}

.calc-empty {
  text-align: center;
  color: var(--color-text-muted);
  padding: 20px;
}

.calc-comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-border-light);
}

.calc-col {
  padding: 12px;
}
.calc-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.calc-value {
  font-size: 14px;
  color: var(--color-text-body);
  margin-bottom: 4px;
  font-family: var(--font-family-display);
}

.calc-deltas {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 10px;
  margin-bottom: 16px;
}
.calc-delta-item {
  padding: 10px 14px;
  background: rgba(255, 198, 41, 0.04);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--color-text-body);
}
.calc-delta-item strong {
  color: var(--color-accent);
  font-family: var(--font-family-display);
}

.calc-advice {
  padding: 16px;
  border-radius: var(--radius-md);
  font-size: 14px;
  line-height: 1.7;
}
.calc-advice-ok {
  background: rgba(72, 209, 122, 0.08);
  border: 1px solid rgba(72, 209, 122, 0.3);
  color: var(--color-accent-success);
}
.calc-advice-caution {
  background: rgba(255, 122, 47, 0.08);
  border: 1px solid rgba(255, 122, 47, 0.3);
  color: var(--color-accent-warning);
}
.calc-advice-danger {
  background: rgba(255, 95, 86, 0.08);
  border: 1px solid rgba(255, 95, 86, 0.3);
  color: var(--color-accent-danger);
}

/* ========== Calculator Responsive ========== */
@media (max-width: 768px) {
  .calc-container {
    grid-template-columns: 1fr;
  }

  .calc-panel {
    padding: 16px;
  }

  .spec-picker {
    gap: 4px;
  }
  .spec-select {
    min-width: 55px;
    padding: 8px 4px;
    font-size: 13px;
  }
  .spec-picker .spec-input {
    min-width: 100px;
  }
}