/* Tablet e desktop stretti */

@media (max-width: 1120px) {
  .topbar {
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .topbar-actions {
    flex: 1 1 520px;
    justify-content: flex-start;
  }

  .workspace,
  .output-grid {
    grid-template-columns: 1fr;
  }

  .editor-panel {
    position: static;
    max-height: none;
    padding-right: 0;
  }
}

/* Mobile */

@media (max-width: 720px) {
  /* Barra superiore */
  .topbar {
    align-items: stretch;
    flex-direction: column;
    gap: 12px;
    padding: 14px 16px;
    position: static;
  }

  .topbar h1 {
    font-size: 24px;
  }

  .brand-logo {
    width: 44px;
    height: 44px;
  }

  .topbar-actions {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    flex: 0 1 auto;
    width: 100%;
    gap: 8px;
  }

  .topbar-actions > * {
    min-width: 0;
  }

  /* Tema, vista e risoluzione sulla stessa riga */
  .theme-toggle {
    grid-column: span 1;
    width: 100%;
    min-width: 0;
    min-height: 44px;
  }

  .mode-select {
    grid-column: span 3;
    width: 100%;
    flex: initial;
    min-width: 0;
  }

  .topbar-actions .primary-button {
    grid-column: span 2;
    width: 100%;
    min-height: 44px;
    font-size: 15px;
  }

  /* Azioni secondarie */
  .topbar-actions .ghost-button {
    grid-column: span 3;
    width: 100%;
    min-height: 40px;
    font-size: 13px;
    line-height: 1.15;
    padding: 0 10px;
    text-align: center;
    white-space: normal;
  }

  /* Area di lavoro */
  .workspace {
    padding: 12px;
    gap: 14px;
  }

  .panel-heading {
    margin-bottom: 10px;
  }

  .panel-heading h2 {
    font-size: 18px;
  }

  /* Problema random */
  .example-row {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 6px;
    margin-bottom: 10px;
  }

  .example-button {
    width: 100%;
    min-height: 36px;
    padding: 0 10px;
    font-size: 12px;
    line-height: 1.15;
    white-space: normal;
  }

  .random-button {
    grid-column: 1 / -1;
  }

  /* Blocchi editor */
  .editor-block {
    padding: 12px;
    margin-bottom: 10px;
  }

  .editor-block h3 {
    font-size: 15px;
    margin-bottom: 10px;
  }

  /* Dimensioni */
  .dimension-row {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }

  /* Funzione obiettivo */
  .objective-row {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  /* Vincoli */
  .constraint-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 6px;
    margin-bottom: 0;
    border-top: 1px solid var(--line);
    padding-top: 10px;
    padding-bottom: 6px;
  }

  /* Coefficienti dei vincoli */
  .constraint-row input[data-action="constraint-coefficient"] {
    min-height: 40px;
  }

  .constraint-row select,
  .constraint-row input[data-action="constraint-rhs"] {
    min-height: 40px;
  }

  .constraint-row .remove-button {
    grid-column: 1 / -1;
    justify-self: end;
  }

  /* Variabili */
  .variable-row {
    grid-template-columns: 1fr 1fr 36px;
    gap: 6px;
    margin-bottom: 0;
    border-top: 1px solid var(--line);
    padding-top: 10px;
    padding-bottom: 6px;
  }

  /* Intestazione matrice */
  .matrix-head {
    display: none;
  }

  .mobile-field-label {
    display: block;
    color: var(--muted);
    font-size: 11px;
    font-weight: 900;
    text-transform: uppercase;
  }

  /* Campi più comodi al tocco */
  input,
  select {
    min-height: 44px;
    font-size: 16px; /* evita lo zoom automatico su iOS */
    padding: 10px 12px;
  }

  /* Pulsanti rimozione */
  .remove-button {
    min-width: 40px;
    min-height: 44px;
    font-size: 16px;
  }

  /* Pulsanti piccoli */
  .icon-button {
    min-width: 44px;
    min-height: 44px;
  }

  /* Stato */
  .status-panel {
    padding: 12px;
    font-size: 14px;
    margin-bottom: 10px;
  }

  /* Toolbar passaggi */
  .step-toolbar {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 6px;
    margin-bottom: 10px;
  }

  .step-toolbar .ghost-button {
    width: 100%;
    min-height: 40px;
    padding: 0 10px;
    font-size: 13px;
    line-height: 1.15;
    white-space: normal;
  }

  .step-counter {
    grid-column: 1 / -1;
    order: -1;
    min-width: 0;
    width: 100%;
    font-size: 12px;
  }

  /* Passaggi e riepiloghi */
  .step-card,
  .summary-card {
    padding: 12px;
    margin-bottom: 12px;
  }

  .step-card h3,
  .summary-card h3 {
    font-size: 15px;
  }

  .step-title {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  /* Testi di spiegazione */
  .explanation {
    font-size: 14px;
    line-height: 1.5;
  }

  .notes-list {
    font-size: 14px;
    padding-left: 16px;
  }

  .calculation-panel {
    padding: 12px;
  }

  .calculation-section h4 {
    font-size: 15px;
  }

  .calculation-list {
    gap: 10px;
    padding-left: 24px;
  }

  .calculation-list li {
    font-size: 15px;
    line-height: 1.65;
  }

  .calculation-list code {
    font-size: 13px;
  }

  .math-line {
    min-height: 52px;
    padding: 8px 0 12px;
  }

  .math-line .katex {
    font-size: 1.05em;
  }

  .standard-transform-panel {
    padding: 12px;
  }

  .standard-transform-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .constraint-transform-head {
    align-items: flex-start;
    flex-direction: column;
    gap: 6px;
  }

  .standard-tags {
    justify-content: flex-start;
  }

  .constraint-transform-math {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .transform-arrow {
    padding-left: 2px;
  }

  /* Tableau */
  .tableau {
    min-width: 500px;
    font-size: 12px;
  }

  .tableau th,
  .tableau td {
    padding: 6px 7px;
  }

  /* Rapporti e metriche */
  .ratio-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .compact-meta {
    grid-template-columns: repeat(2, 1fr);
  }

  .metric {
    padding: 8px;
  }

  .metric-value {
    font-size: 16px;
  }

  /* Testo del problema */
  .problem-text {
    font-size: 12px;
  }

  /* Avvisi */
  .callout {
    font-size: 13px;
    padding: 8px 10px;
  }

}

/* Telefoni molto stretti */

@media (max-width: 400px) {
  .topbar h1 {
    font-size: 20px;
  }

  .workspace {
    padding: 8px;
    gap: 10px;
  }

  .editor-block {
    padding: 10px;
  }

  .theme-toggle {
    grid-column: span 2;
  }

  .mode-select {
    grid-column: span 4;
  }

  .topbar-actions .primary-button {
    grid-column: 1 / -1;
  }

  /* Azioni secondarie a tutta larghezza */
  .topbar-actions .ghost-button {
    grid-column: 1 / -1;
  }

  .dimension-row,
  .constraint-row {
    grid-template-columns: 1fr;
  }

  .variable-row {
    grid-template-columns: 1fr 36px;
  }

  .variable-row select {
    grid-column: 1 / -1;
  }

  .ratio-grid,
  .solution-grid {
    grid-template-columns: 1fr;
  }

  .compact-meta {
    grid-template-columns: 1fr 1fr;
  }

  .step-toolbar .ghost-button {
    padding: 0 8px;
    font-size: 12px;
  }
}

/* Niente hover sui dispositivi touch */

@media (hover: none) {
  .primary-button:hover:not(:disabled),
  .ghost-button:hover:not(:disabled),
  .example-button:hover:not(:disabled),
  .icon-button:hover:not(:disabled),
  .theme-toggle:hover {
    filter: none;
    background: revert;
  }
}

/* Telefoni in orizzontale */

@media (max-width: 720px) and (orientation: landscape) {
  .topbar {
    padding: 10px 16px;
    gap: 8px;
  }

  .topbar h1 {
    font-size: 20px;
  }

  .eyebrow {
    margin-bottom: 2px;
    font-size: 10px;
  }
}

/* Safe area */

@supports (padding: env(safe-area-inset-left)) {
  .topbar {
    padding-left: max(16px, env(safe-area-inset-left));
    padding-right: max(16px, env(safe-area-inset-right));
  }

  .workspace {
    padding-left: max(12px, env(safe-area-inset-left));
    padding-right: max(12px, env(safe-area-inset-right));
  }
}