.roi-calculator-container {
  padding: 2rem;
  margin-top: 3rem;
  background-color: var(--surface);
  border: 1px solid var(--border-light);
  border-radius: 16px;
  color: var(--text-light);
}

.roi-header-flex {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.roi-title {
  margin: 0;
  font-size: 1.5rem;
  color: var(--primary);
}

.roi-presets {
  display: flex;
  gap: 0.5rem;
}

.roi-preset-btn {
  background: var(--surface-light);
  border: 1px solid var(--border-light);
  color: var(--text-muted);
  padding: 0.4rem 1rem;
  border-radius: 20px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 0.9rem;
}

.roi-preset-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-light);
}

.roi-preset-btn.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.roi-input-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.roi-card {
  padding: 1.5rem;
  border-radius: 12px;
  background-color: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.roi-card-title {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.roi-input-group {
  margin-bottom: 1rem;
}

.roi-input-group:last-child {
  margin-bottom: 0;
}

.roi-input-group label {
  display: block;
  font-size: 0.9rem;
  color: var(--text-light);
  margin-bottom: 0.4rem;
}

.roi-input-group input {
  width: 100%;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border-light);
  color: var(--text-light);
  padding: 0.8rem;
  border-radius: 8px;
  font-size: 1rem;
  outline: none;
  transition: border-color 0.3s;
}

.roi-input-group input:focus {
  border-color: var(--primary);
}

.roi-metric-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-bottom: 2rem;
}

.roi-metric-card {
  padding: 1.2rem;
  border-radius: 12px;
  background-color: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.roi-metric-value {
  font-size: 1.5rem;
  font-weight: bold;
  margin-bottom: 0.3rem;
  color: var(--text-light);
}

.text-positive {
  color: var(--accent-success, #4CAF50);
}

.text-negative {
  color: var(--accent-danger, #F44336);
}

.bg-positive {
  background-color: var(--accent-success, #4CAF50);
}

.bg-negative {
  background-color: var(--accent-danger, #F44336);
}

.roi-metric-label {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.roi-table-container {
  margin-top: 2rem;
}

.roi-table-title {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.roi-table-wrapper {
  overflow-x: auto;
}

.roi-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.roi-table th {
  padding: 1rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-light);
  font-weight: 500;
}

.roi-table td {
  padding: 1rem;
  font-size: 0.95rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.roi-row-breakeven {
  background-color: rgba(76, 175, 80, 0.1);
}

.roi-row-breakeven td {
  color: var(--accent-success, #4CAF50);
  font-weight: 500;
}

.roi-progress-cell {
  min-width: 100px;
}

.roi-progress-bar {
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  overflow: hidden;
}

.roi-progress-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.3s ease;
}

.roi-ai-container {
  margin-top: 2rem;
}

.roi-ai-result {
  margin-top: 1rem;
  padding: 1.5rem;
  background: rgba(108, 99, 255, 0.1);
  border: 1px solid var(--primary);
  border-radius: 8px;
  line-height: 1.6;
}

.roi-ai-result h4 {
  margin-top: 0;
  margin-bottom: 1rem;
  color: var(--primary);
}

.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid rgba(255,255,255,0.3);
  border-radius: 50%;
  border-top-color: var(--primary);
  animation: spin 1s ease-in-out infinite;
  vertical-align: middle;
  margin-right: 8px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@media (max-width: 768px) {
  .roi-input-cards {
    grid-template-columns: 1fr;
  }
  
  .roi-metric-cards {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 480px) {
  .roi-metric-cards {
    grid-template-columns: 1fr;
  }
  
  .roi-header-flex {
    flex-direction: column;
    align-items: flex-start;
  }
}