.paint-calculator {
  max-width: 1000px;
  margin: 0 auto;
}

.paint-calculator h2,
.paint-calculator h3,
.paint-calculator h4 {
  margin-top: 0;
}

.paint-calculator .tool-panel {
  background: var(--panel-background);
  border: 1px solid var(--border);
  padding: 1.5rem;
}

.paint-section {
  padding-bottom: 1.5rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.paint-section:last-child {
  margin-bottom: 0;
}

.paint-section-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.paint-section-heading p,
.paint-calculator .tool-panel-header p {
  margin: 0.35rem 0 0;
  color: var(--text-muted);
}

.paint-grid {
  display: grid;
  gap: 1rem;
  margin-bottom: 1rem;
}

.paint-grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.paint-grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.paint-grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.paint-field {
  min-width: 0;
}

.paint-field label {
  display: block;
  margin-bottom: 0.4rem;
  font-weight: 700;
}

.paint-help {
  color: var(--text-muted);
  font-size: 0.8rem;
  font-weight: 400;
}

.paint-field small {
  display: block;
  margin-top: 0.4rem;
  color: var(--text-muted);
  font-size: 0.8rem;
  line-height: 1.4;
}

.paint-field input,
.paint-field select {
  width: 100%;
  min-height: 2.7rem;
  padding: 0.55rem 0.65rem;
  border: 1px solid var(--border);
  background: var(--surface-background);
  color: var(--text-dark);
  font: inherit;
  box-sizing: border-box;
}

.paint-field input:focus,
.paint-field select:focus {
  outline: 2px solid var(--main);
  outline-offset: 1px;
}

.paint-input-prefix,
.paint-input-suffix {
  display: flex;
  align-items: stretch;
}

.paint-input-prefix span,
.paint-input-suffix span {
  display: flex;
  align-items: center;
  padding: 0 0.7rem;
  background: var(--main);
  color: var(--page-background);
  font-weight: 700;
}

.paint-input-prefix input,
.paint-input-suffix input {
  min-width: 0;
}

.paint-option-box {
  display: flex;
  align-items: center;
  border: 1px solid var(--border);
  padding: 0.8rem;
  min-height: 2.7rem;
  box-sizing: border-box;
}

.checkbox-option {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  cursor: pointer;
}

.checkbox-option input {
  margin-top: 0.2rem;
  accent-color: var(--main);
}

.checkbox-option span {
  line-height: 1.4;
}

.checkbox-option small {
  display: block;
  margin-top: 0.15rem;
  color: var(--text-muted);
}

.paint-conditional {
  margin-top: 1rem;
  padding: 1rem;
  border-left: 3px solid var(--main);
  background: rgba(255, 255, 255, 0.025);
}

.paint-conditional[hidden] {
  display: none;
}

.paint-options-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1rem;
}

.paint-rooms {
  display: grid;
  gap: 1rem;
}

.paint-room {
  border: 1px solid var(--border);
  padding: 1rem;
  background: rgba(255, 255, 255, 0.02);
}

.paint-room-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}

.paint-room-header h3 {
  display: inline;
  margin: 0;
}

.paint-room-number {
  color: var(--main);
  font-weight: 800;
  margin-right: 0.35rem;
}

.paint-remove-room {
  padding: 0.4rem 0.7rem;
  background: transparent;
  color: var(--error);
  border-color: var(--error);
}

.paint-remove-room:hover {
  background: var(--error);
  color: var(--page-background);
}

.paint-room-result {
  margin-top: 1rem;
  padding: 0.75rem;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.9rem;
}

.paint-room-result strong {
  color: var(--main);
}

.paint-summary-section {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 2px solid var(--main);
}

.paint-summary {
  display: grid;
  gap: 1rem;
}

.paint-summary-total {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.paint-summary-card {
  border: 1px solid var(--border);
  padding: 1rem;
  background: rgba(255, 255, 255, 0.025);
}

.paint-summary-card-label {
  display: block;
  margin-bottom: 0.25rem;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.paint-summary-card-value {
  display: block;
  color: var(--main);
  font-size: 1.6rem;
  font-weight: 900;
}

.paint-summary-table-wrap {
  overflow-x: auto;
}

.paint-summary-table {
  width: 100%;
  border-collapse: collapse;
}

.paint-summary-table th,
.paint-summary-table td {
  padding: 0.65rem;
  border: 1px solid var(--border);
  text-align: left;
}

.paint-summary-table th {
  background: var(--main);
  color: var(--page-background);
}

.paint-summary-table td {
  background: var(--panel-background);
}

.paint-summary-notes {
  padding: 1rem;
  border-left: 3px solid var(--note);
  background: rgba(228, 241, 103, 0.05);
  color: var(--text-muted);
}

.paint-disclaimer {
  margin-top: 1.5rem;
  padding: 1rem;
  border-left: 3px solid var(--note);
  background: rgba(228, 241, 103, 0.05);
}

.paint-calculator .tool-info {
  margin-top: 2rem;
}

.paint-calculator .tool-info h2 {
  margin-top: 2.5rem;
  color: var(--main);
}

.paint-calculator .tool-info h3 {
  margin-top: 1.5rem;
}

.paint-calculator .tool-info p {
  line-height: 1.65;
  color: var(--text-muted);
}

@media (max-width: 800px) {
  .paint-grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .paint-summary-total {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .paint-calculator .tool-panel {
    padding: 1rem;
  }

  .paint-grid-2,
  .paint-grid-3,
  .paint-grid-4 {
    grid-template-columns: 1fr;
  }

  .paint-section-heading {
    flex-direction: column;
  }

  .paint-section-heading .tool-button {
    width: 100%;
  }

  .paint-options-row {
    flex-direction: column;
    gap: 0.75rem;
  }

  .paint-room-header {
    flex-direction: column;
  }

  .paint-remove-room {
    width: 100%;
  }
}