/* Pannelli */

.section,
.status-panel,
.step-card,
.summary-card,
.editor-block {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  transition: background var(--speed), border-color var(--speed),
    box-shadow var(--speed);
}

.editor-block {
  padding: 16px;
  margin-bottom: 14px;
  overflow-x: auto;
}

.editor-block h3,
.step-card h3,
.summary-card h3 {
  margin: 0 0 12px;
  font-size: 16px;
  letter-spacing: 0;
}

/* Bottoni */

.primary-button,
.ghost-button,
.icon-button,
.example-button {
  min-height: 38px;
  border-radius: 8px;
  padding: 0 14px;
  font-weight: 800;
  letter-spacing: 0;
  min-width: 0;
  white-space: nowrap;
  transition: background 0.15s, border-color 0.15s, color 0.15s,
    transform 0.1s;
}

.primary-button:active,
.ghost-button:active,
.icon-button:active,
.example-button:active {
  transform: scale(0.97);
}

.primary-button {
  background: var(--accent);
  color: var(--accent-contrast);
}

.primary-button:hover:not(:disabled) {
  filter: brightness(1.1);
}

.primary-button:disabled {
  opacity: 0.72;
  cursor: not-allowed;
  filter: none;
}

/* Loading spinner on the Risolvi button */

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

.primary-button.is-loading {
  pointer-events: none;
  opacity: 0.82;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.primary-button.is-loading::before {
  content: "";
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255,255,255,0.35);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.65s linear infinite;
  flex-shrink: 0;
}

.ghost-button,
.example-button {
  background: var(--surface);
  color: var(--ink);
  border: 1px solid var(--line);
}

.ghost-button:hover:not(:disabled),
.example-button:hover:not(:disabled) {
  background: var(--surface-2);
}

.icon-button {
  min-width: 42px;
  background: var(--surface-2);
  color: var(--accent-2);
  border: 1px solid var(--line);
}

.icon-button:hover:not(:disabled) {
  background: var(--line);
}

.example-row {
  margin-bottom: 14px;
}

.example-button {
  min-height: 34px;
  padding: 0 11px;
  font-size: 13px;
}

.random-button {
  flex: 1 1 100%;
}

.remove-button {
  width: 36px;
  min-height: 38px;
  border-radius: 8px;
  color: var(--danger);
  background: var(--remove-bg);
  border: 1px solid var(--remove-border);
  font-weight: 900;
  transition: background 0.15s, transform 0.1s;
}

.remove-button:active {
  transform: scale(0.95);
}

/* Cambio tema */

.theme-toggle {
  min-width: 38px;
  min-height: 38px;
  border-radius: 8px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.15s;
}

.theme-toggle:hover {
  background: var(--line);
}

/* Selettore vista */

.mode-select {
  flex: 0 0 132px;
  display: grid;
  gap: 4px;
  min-width: 132px;
}

.mode-select span {
  color: var(--muted);
  font-size: 11px;
  font-weight: 900;
  text-transform: uppercase;
}

.mode-select select {
  min-height: 38px;
}

/* Campi */

.field {
  display: grid;
  gap: 6px;
}

.field label,
.matrix-label {
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

input,
select {
  width: 100%;
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 10px;
  background: var(--input-bg);
  color: var(--ink);
  transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
}

input:focus,
select:focus {
  border-color: var(--accent-2);
  outline: 3px solid color-mix(in srgb, var(--accent-2) 18%, transparent);
}

/* Validazione inline */

input.input-error {
  border-color: var(--danger);
  background: var(--remove-bg);
}

input.input-error:focus {
  border-color: var(--danger);
  outline-color: color-mix(in srgb, var(--danger) 18%, transparent);
}

.input-error-tip {
  color: var(--danger);
  font-size: 11px;
  font-weight: 700;
  margin-top: 2px;
  animation: fadeSlideIn 0.2s ease;
}

@keyframes fadeSlideIn {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Stato */

.status-panel {
  padding: 14px 16px;
  margin-bottom: 14px;
  font-weight: 700;
  transition: background var(--speed), border-color var(--speed),
    color var(--speed);
}

.empty-state {
  color: var(--muted);
  font-weight: 600;
}

.status-optimal {
  border-color: color-mix(in srgb, var(--good) 38%, var(--line));
  background: color-mix(in srgb, var(--good) 8%, var(--surface));
  color: var(--good);
}

.status-warning {
  border-color: color-mix(in srgb, var(--warning) 38%, var(--line));
  background: color-mix(in srgb, var(--warning) 8%, var(--surface));
  color: var(--warning);
}

.status-error {
  border-color: color-mix(in srgb, var(--danger) 38%, var(--line));
  background: var(--remove-bg);
  color: var(--danger);
}

/* Badge */

.phase-badge,
.tag {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  border-radius: 999px;
  padding: 0 10px;
  background: var(--surface-2);
  color: var(--accent-2);
  font-size: 12px;
  font-weight: 900;
}

/* Avvisi */

.callout {
  border-left: 4px solid var(--accent-2);
  padding: 10px 12px;
  background: var(--callout-bg);
  border-radius: 8px;
  color: var(--callout-ink);
}

/* Feedback copia */

.copy-feedback {
  color: var(--good);
  font-size: 13px;
  font-weight: 800;
}

/* Aggiungi vincolo al tableau ottimo */

.add-constraint-banner {
  margin-bottom: 14px;
  animation: fadeSlideIn 0.25s ease;
}

.add-constraint-card {
  background: var(--surface);
  border: 1px solid var(--accent);
  border-left: 4px solid var(--accent);
  border-radius: 8px;
  padding: 16px;
  box-shadow: var(--shadow);
}

.add-constraint-card h3 {
  margin: 0 0 14px;
  font-size: 15px;
  color: var(--accent-2);
  letter-spacing: 0;
}

.add-constraint-inputs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-bottom: 14px;
}

.add-constraint-inputs .coeff-group {
  display: inline-flex;
  align-items: center;
  gap: 3px;
}

.add-constraint-inputs input[type="text"] {
  width: 58px;
  text-align: center;
  min-height: 36px;
  padding: 6px 4px;
  font-size: 14px;
  font-weight: 700;
}

.add-constraint-inputs select {
  width: auto;
  min-width: 52px;
  min-height: 36px;
  font-weight: 700;
}

.add-constraint-inputs .var-label {
  font-weight: 800;
  font-size: 14px;
  color: var(--ink);
}

.add-constraint-inputs .op-label {
  font-weight: 800;
  font-size: 15px;
  color: var(--muted);
  margin: 0 2px;
}

.add-constraint-actions {
  display: flex;
  gap: 8px;
}

.add-constraint-result-msg {
  margin-top: 12px;
  padding: 10px 12px;
  border-radius: 8px;
  font-weight: 700;
  font-size: 14px;
}

.add-constraint-result-msg.msg-optimal {
  background: color-mix(in srgb, var(--good) 8%, var(--surface));
  border: 1px solid color-mix(in srgb, var(--good) 38%, var(--line));
  color: var(--good);
}

.add-constraint-result-msg.msg-infeasible {
  background: color-mix(in srgb, var(--warning) 8%, var(--surface));
  border: 1px solid color-mix(in srgb, var(--warning) 38%, var(--line));
  color: var(--warning);
}

.add-constraint-result-msg.msg-unchanged {
  background: color-mix(in srgb, var(--good) 8%, var(--surface));
  border: 1px solid color-mix(in srgb, var(--good) 38%, var(--line));
  color: var(--good);
}