:root {
  color-scheme: light;
  --border: #d7dce1;
  --bg: #f4f6f8;
  --panel-bg: #ffffff;
  --text: #1f2933;
  --accent: #4a6fa5;
  --code-bg: #12222f;
  --code-fg: #dce8f0;
}

* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
}

body {
  display: flex;
  flex-direction: column;
}

.app-footer {
  flex: none;
  padding: 0.25rem 1rem;
  font-size: 0.7rem;
  color: var(--text);
  opacity: 0.5;
  text-align: center;
  background: var(--panel-bg);
  border-top: 1px solid var(--border);
}

.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding: 0.6rem 1rem;
  background: var(--panel-bg);
  border-bottom: 1px solid var(--border);
}

.title-block {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  flex-wrap: wrap;
  min-width: 0;
}

.toolbar h1 {
  font-size: 1.1rem;
  margin: 0;
  white-space: nowrap;
}

.tagline {
  margin: 0;
  font-size: 0.82rem;
  color: #52606d;
  white-space: nowrap;
}

.toolbar-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.toolbar-actions button,
.toolbar-actions select {
  font-size: 0.95rem;
  padding: 0.4rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--panel-bg);
  cursor: pointer;
}

.toolbar-actions button:hover {
  background: #eef1f4;
}

.example-picker {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.9rem;
}

/* --- Barra di esecuzione ------------------------------------------------ */
.exec-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: var(--panel-bg);
  border-bottom: 1px solid var(--border);
}

.exec-bar button {
  font-size: 0.9rem;
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--panel-bg);
  cursor: pointer;
}

.exec-bar button:hover:not(:disabled) {
  background: #eef1f4;
}

.exec-bar button:disabled {
  opacity: 0.5;
  cursor: default;
}

#btnRun {
  border-color: #3fa66a;
  color: #1e6b3f;
}

#btnStop {
  border-color: #d9534f;
  color: #a33328;
}

.exec-status {
  font-size: 0.85rem;
  color: #52606d;
  margin-left: 0.25rem;
}

.workspace-area {
  flex: 1;
  display: flex;
  min-height: 0;
}

#blocklyDiv {
  flex: 1.4;
  min-width: 0;
  height: 100%;
  transition: opacity 0.15s ease;
}

#blocklyDiv.exec-locked {
  opacity: 0.6;
  pointer-events: none;
}

/* Rinforza l'evidenziazione nativa di Blockly (workspace.highlightBlock),
   altrimenti troppo tenue rispetto a .exec-highlight nei pannelli di
   codice: stesso colore, cosi' lo studente riconosce a colpo d'occhio che
   e' lo stesso "passo" evidenziato in due punti diversi dello schermo. */
.blocklyHighlighted .blocklyPath {
  stroke: #f4c95d;
  stroke-width: 3px;
}

.outputs {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  border-left: 1px solid var(--border);
  background: var(--code-bg);
}

.tabs {
  display: flex;
  flex: none;
  background: var(--panel-bg);
  border-bottom: 1px solid var(--border);
}

.tab-btn {
  flex: 1;
  padding: 0.6rem 0.5rem;
  text-align: center;
  font-size: 0.85rem;
  font-weight: 600;
  color: #52606d;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
}

.tab-btn:hover {
  color: var(--text);
}

.tab-btn.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.code-body {
  flex: 1;
  min-height: 0;
  position: relative;
}

.code-panel {
  display: none;
  height: 100%;
}

.code-panel.active {
  display: block;
}

.output-code {
  height: 100%;
  margin: 0;
  padding: 0.9rem 1rem;
  overflow: auto;
  box-sizing: border-box;
  color: var(--code-fg);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.9rem;
  line-height: 1.5;
  white-space: pre;
}

.copy-btn {
  position: absolute;
  top: 0.6rem;
  right: 1rem;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.3rem 0.65rem;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: rgba(255, 255, 255, 0.08);
  color: var(--code-fg);
  cursor: pointer;
}

.copy-btn:hover {
  background: rgba(255, 255, 255, 0.18);
}

/* --- Evidenziazione del blocco in esecuzione nei pannelli di codice ---- */
.exec-highlight {
  background: #f4c95d;
  color: #12222f;
  border-radius: 3px;
  padding: 0 2px;
  margin: 0 -2px;
}

/* --- Scheda "Esecuzione" (console) ------------------------------------- */
.run-panel.active {
  display: flex;
  flex-direction: column;
}

.run-console {
  flex: 1;
  min-height: 0;
  overflow: auto;
  padding: 0.9rem 1rem;
  color: var(--code-fg);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.9rem;
  line-height: 1.6;
}

.run-line {
  white-space: pre-wrap;
}

.run-line.run-output::before {
  content: "→ ";
  opacity: 0.7;
}

.run-line.run-input {
  color: #8fd0ff;
}

.run-line.run-error {
  color: #ff9d8a;
  font-weight: 600;
}

.run-input-form {
  display: flex;
  flex: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1rem;
  background: rgba(255, 255, 255, 0.06);
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  color: var(--code-fg);
  font-size: 0.85rem;
}

.run-input-form input {
  flex: 1;
  min-width: 0;
  padding: 0.3rem 0.5rem;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: rgba(255, 255, 255, 0.08);
  color: var(--code-fg);
  font-family: inherit;
  font-size: inherit;
}

.run-input-form button {
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.3rem 0.65rem;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: rgba(255, 255, 255, 0.15);
  color: var(--code-fg);
  cursor: pointer;
}

.run-input-form button:hover {
  background: rgba(255, 255, 255, 0.25);
}

/* --- Notifica toast --------------------------------------------------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: 1.25rem;
  transform: translateX(-50%) translateY(10px);
  max-width: calc(100vw - 2rem);
  padding: 0.6rem 1.1rem;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  text-align: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
  background: var(--panel-bg);
  border: 1px solid var(--border);
  color: var(--text);
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.toast.success {
  background: #e5f6ec;
  border-color: #3fa66a;
  color: #1e6b3f;
}

.toast.error {
  background: #fdeceb;
  border-color: #d9534f;
  color: #a33328;
}

/* --- Modale (benvenuto e futuri usi) ----------------------------------- */
.modal {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: rgba(15, 23, 33, 0.55);
  z-index: 2000;
}

.modal[hidden] {
  display: none;
}

.modal-box {
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  padding: 1.5rem;
  border-radius: 12px;
  background: var(--panel-bg);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.25);
}

.modal-box h2 {
  margin: 0 0 0.75rem;
  font-size: 1.15rem;
}

.modal-box p {
  margin: 0 0 0.75rem;
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--text);
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 1rem;
}

.modal-btn {
  padding: 0.5rem 1.1rem;
  border-radius: 8px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
}

.modal-btn:hover {
  opacity: 0.9;
}

@media (max-width: 480px) {
  .modal-box {
    padding: 1.1rem;
  }
  .toast {
    width: calc(100% - 2rem);
  }
}

@media (max-width: 900px) {
  .workspace-area {
    flex-direction: column;
  }
  #blocklyDiv {
    height: 55vh;
  }
  .outputs {
    border-left: none;
    border-top: 1px solid var(--border);
  }
}