/* ============================================================================
   Infinity Sheets - Solver & Goal Seek Optimization Suite Styles
   Microsoft Excel / Google Sheets Standard What-If & Linear Programming Modeling
   ============================================================================ */

.solver-modal-card {
  max-width: 660px;
  width: 95%;
  background: var(--bg-surface, #ffffff);
  border: 1px solid var(--border-color, #cbd5e1);
  border-radius: 10px;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.18), 0 10px 10px -5px rgba(0, 0, 0, 0.1);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: solverModalPop 0.18s ease-out;
  font-family: inherit;
}

@keyframes solverModalPop {
  from { opacity: 0; transform: scale(0.96) translateY(-8px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.solver-modal-header {
  padding: 14px 18px;
  background: linear-gradient(90deg, #0f766e, #107c41);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.solver-modal-title {
  font-size: 0.95rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 9px;
  letter-spacing: 0.01em;
}

.solver-modal-close {
  background: transparent;
  border: none;
  color: rgba(255, 255, 255, 0.85);
  font-size: 1.25rem;
  line-height: 1;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 4px;
  transition: all 0.15s ease;
}

.solver-modal-close:hover {
  background: rgba(255, 255, 255, 0.2);
  color: #ffffff;
}

.solver-modal-body {
  padding: 16px 20px;
  overflow-y: auto;
  max-height: 75vh;
  display: flex;
  flex-direction: column;
  gap: 14px;
  font-size: 0.82rem;
  color: var(--text-main, #1e293b);
}

.solver-section-box {
  background: var(--bg-surface-secondary, #f8fafc);
  border: 1px solid var(--border-color, #e2e8f0);
  border-radius: 8px;
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.solver-field-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.solver-field-label {
  width: 140px;
  min-width: 140px;
  font-weight: 600;
  color: var(--text-main, #334155);
}

.solver-input-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 6px;
}

.solver-input {
  flex: 1;
  padding: 6px 10px;
  font-size: 0.82rem;
  font-family: inherit;
  border: 1px solid var(--border-color, #cbd5e1);
  border-radius: 6px;
  background: var(--bg-surface, #ffffff);
  color: var(--text-main, #1e293b);
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.solver-input:focus {
  border-color: #107c41;
  box-shadow: 0 0 0 2px rgba(16, 124, 65, 0.2);
}

.solver-btn-use-cell {
  background: var(--bg-surface, #ffffff);
  border: 1px solid var(--border-color, #cbd5e1);
  color: var(--text-muted, #64748b);
  padding: 6px 9px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.75rem;
  transition: all 0.15s ease;
}

.solver-btn-use-cell:hover {
  background: var(--bg-surface-secondary, #f1f5f9);
  color: var(--primary-color, #107c41);
}

/* Radio Choice for Objective */
.solver-radio-group {
  display: flex;
  align-items: center;
  gap: 16px;
}

.solver-radio-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  font-weight: 500;
}

.solver-radio-label input[type="radio"] {
  accent-color: #107c41;
  cursor: pointer;
}

/* Constraints List & Table */
.solver-constraints-box {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.solver-constraints-table-wrap {
  max-height: 140px;
  overflow-y: auto;
  border: 1px solid var(--border-color, #cbd5e1);
  border-radius: 6px;
  background: var(--bg-surface, #ffffff);
}

.solver-constraints-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
}

.solver-constraints-table th {
  background: var(--bg-surface-secondary, #f1f5f9);
  padding: 6px 10px;
  font-weight: 700;
  text-align: left;
  border-bottom: 1px solid var(--border-color, #cbd5e1);
  color: var(--text-muted, #475569);
}

.solver-constraints-table td {
  padding: 6px 10px;
  border-bottom: 1px solid var(--border-color, #e2e8f0);
}

.solver-constraints-table tr:last-child td {
  border-bottom: none;
}

.solver-constraints-table tr.selected {
  background: rgba(16, 124, 65, 0.1);
}

.solver-constraint-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.solver-btn-sm {
  padding: 5px 10px;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 6px;
  border: 1px solid var(--border-color, #cbd5e1);
  background: var(--bg-surface, #ffffff);
  color: var(--text-main, #334155);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: all 0.15s ease;
}

.solver-btn-sm:hover {
  background: var(--bg-surface-secondary, #f1f5f9);
  border-color: #94a3b8;
}

/* Modal Footer */
.solver-modal-footer {
  padding: 12px 20px;
  background: var(--bg-surface-secondary, #f8fafc);
  border-top: 1px solid var(--border-color, #e2e8f0);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.solver-status-indicator {
  font-size: 0.75rem;
  color: var(--text-muted, #64748b);
  display: flex;
  align-items: center;
  gap: 6px;
}

.solver-status-indicator.success {
  color: #059669;
  font-weight: 600;
}

.solver-status-indicator.error {
  color: #dc2626;
  font-weight: 600;
}

.solver-modal-buttons {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-solver-solve {
  background: #107c41;
  color: #ffffff;
  border: 1px solid #0b6333;
  padding: 6px 16px;
  border-radius: 6px;
  font-weight: 700;
  font-size: 0.82rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s ease;
}

.btn-solver-solve:hover {
  background: #0e6b37;
}

.btn-solver-solve:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Result Dialog / Popover */
.solver-result-box {
  background: #ecfdf5;
  border: 1px solid #a7f3d0;
  border-radius: 8px;
  padding: 10px 14px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: #065f46;
  font-size: 0.82rem;
}

.solver-result-icon {
  font-size: 1.25rem;
  color: #10b981;
  margin-top: 1px;
}

/* Scenario Manager Specific */
.scenario-list-wrap {
  border: 1px solid var(--border-color, #cbd5e1);
  border-radius: 6px;
  max-height: 160px;
  overflow-y: auto;
  background: var(--bg-surface, #ffffff);
}

.scenario-item {
  padding: 8px 12px;
  border-bottom: 1px solid var(--border-color, #e2e8f0);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  transition: background 0.15s ease;
}

.scenario-item:last-child {
  border-bottom: none;
}

.scenario-item:hover {
  background: var(--bg-surface-secondary, #f1f5f9);
}

.scenario-item.active {
  background: rgba(16, 124, 65, 0.1);
  border-left: 3px solid #107c41;
  font-weight: 700;
}