:root {
  --color-primary: #f96420;
  --color-primary-light: #f7a955;
  --color-primary-dark: #f74f00;
  --color-primary-80: rgba(249, 100, 32, 0.8);
  --color-primary-50: rgba(249, 100, 32, 0.5);
  --color-primary-30: rgba(249, 100, 32, 0.3);
  --color-primary-20: rgba(249, 100, 32, 0.2);
  --color-secondary: #1e293b;
  --color-secondary-light: #334155;
  --color-secondary-dark: #020617;
  --color-secondary-50: rgba(30, 41, 59, 0.5);
  --color-secondary-80: rgba(30, 41, 59, 0.8);
  --color-secondary-30: rgba(30, 41, 59, 0.3);
  --color-secondary-20: rgba(30, 41, 59, 0.2);
  --color-accent: #207df9;
  --color-accent-light: #4dabf7;
  --color-accent-dark: #0e5aee;
  --color-accent-30: rgba(32, 125, 249, 0.3);
  --color-text: #f8fafc;
  --color-text-primary: #f8fafc;
  --color-text-secondary: #cbd5e1;
  --color-text-tertiary: #94a3b8;
  --color-text-light: #e2e8f0;
  --color-text-primary-30: rgba(248, 250, 252, 0.3);
  --color-background: #020617;
  --color-surface: #020612;
  --color-overlay: rgba(15, 23, 42, 0.9);
  --color-success: #22c55e;
  --color-code-hello: #2095f7;
  --color-error: #ef4444;
  --color-warning: #f59e0b;
  --color-info: #3b82f6;

  --font-h1: 2.5rem/1.2 'Onest', sans-serif;
  --font-h2: 2rem/1.3 'Onest', sans-serif;
  --font-h3: 1.75rem/1.3 'Onest', sans-serif;
  --font-h4: 1.5rem/1.4 'Onest', sans-serif;
  --font-body: 1rem/1.5 'Onest', sans-serif;
  --font-small: 0.875rem/1.5 'Onest', sans-serif;
  --font-tiny: 0.75rem/1.5 'Onest', sans-serif;
  --font-code: 0.875rem/1.6 'Fira Code', monospace;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;

  --transition-normal: 250ms;
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);

  --section-header-height: calc(var(--font-small) * 1.5 + 2 * var(--space-2) + 1px);
  --status-bar-height: calc(var(--font-tiny) * 1.5 + 2 * var(--space-1));
  --exercise-buttons-container-height: calc( (var(--font-tiny) * 1.5 + 2 * var(--space-1)) + 2 * var(--space-2) );
  --footer-height-default: var(--status-bar-height);
  --footer-height-exercise: calc(var(--status-bar-height) + var(--exercise-buttons-container-height));

  --current-footer-padding: var(--footer-height-default);

  --exercise-bottom-row-min-height: 20rem;
}

html {
  height: 100%;
}
body {
  height: 100%; margin: 0; padding: 0;
  padding-bottom: 0;
  overflow: hidden;
  font: var(--font-body); background-color: var(--color-background);
  color: var(--color-text); display: flex; flex-direction: column;
  box-sizing: border-box;
}
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }
* { box-sizing: border-box; }

main.workspace {
  flex: 1;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.statement-container, .editor-section, .terminal-section, .testcases-container {
  display: flex; flex-direction: column; overflow: hidden;
  background-color: var(--color-surface);
}

.section-header {
  background-color: var(--color-secondary-dark);
  color: var(--color-text-primary);
  padding: var(--space-2) var(--space-4);
  font: var(--font-small);
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--color-secondary-light);
  flex-shrink: 0;
  height: var(--section-header-height);
}

.terminal-title-group {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.terminal-header-controls {
  display: flex;
  align-items: center;
}

.review-error-button {
  background-color: var(--color-error);
  color: var(--color-text-primary);
  padding: 0.2rem 0.6rem;
  border-radius: var(--space-1);
  font-size: var(--font-tiny);
  font-weight: 600;
  white-space: nowrap;
  border: 1px solid rgba(255, 255, 255, 0.2);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  transition: all var(--transition-normal) ease;
}

.review-error-button:hover {
  background-color: #dc2626;
  transform: translateY(-1px);
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.review-error-button.hidden {
  display: none;
}

.review-error-button #review-error-close-btn {
  font-size: 0.9em;
  color: var(--color-text-light);
  opacity: 0.7;
  transition: opacity 0.2s;
  padding: 2px;
}

.review-error-button #review-error-close-btn:hover {
  opacity: 1;
  transform: scale(1.1);
}

#toggle-terminal-btn i {
  font-size: 1.2rem;
}

.editor-title-group {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.statement-content, .terminal-content, .testcases-content, .CodeMirror {
  flex: 1;
  overflow: auto; padding: var(--space-4);
}
.terminal-content { padding: var(--space-2) var(--space-4); min-height: 0; }
.CodeMirror { padding: 0; }

.loading { display: flex; align-items: center; gap: var(--space-2); }
.spinner { border: 2px solid rgba(255,255,255,0.1); border-top: 2px solid var(--color-primary); border-radius: 50%; width: 1rem; height: 1rem; animation: spin 1s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

.app-footer {
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--color-secondary-dark);
  border-top: 1px solid var(--color-secondary-light);
  z-index: 10;
  display: flex;
  flex-direction: column;
}

.app-footer #exercise-buttons {
  border-bottom: 1px solid var(--color-secondary-light);
  display: none;
  height: var(--exercise-buttons-container-height);
}

.status-bar {
  display: flex; justify-content: space-between; align-items: center;
  padding: var(--space-1) var(--space-4);
  font: var(--font-tiny); font-family: 'Onest', sans-serif;
  flex-shrink: 0;
  height: var(--status-bar-height);
  background-color: var(--color-primary);
  color: var(--color-text-primary);
}
.status-bar .status-item { display: flex; align-items: center; gap: var(--space-2); }
.status-bar .status-item svg { width: 0.875rem; height: 0.875rem; vertical-align: middle; stroke: currentColor; }

body:not(.exercise) .statement-container,
body:not(.exercise) .testcases-container {
  display: none;
}

body:not(.exercise) .editor-section {
  flex: 3;
  min-height: 0;
}

body:not(.exercise) .terminal-section {
  flex: 1;
  border-top: 1px solid var(--color-secondary-light);
  min-height: 12.8rem;
  display: flex;
  flex-direction: column;
}

body:not(.exercise) .terminal-section.collapsed {
  flex-grow: 0;
  flex-shrink: 0;
  flex-basis: var(--section-header-height);
  height: var(--section-header-height);
  min-height: var(--section-header-height);
  overflow: hidden;
}

body.exercise {
  --current-footer-padding: var(--footer-height-exercise);
  padding-bottom: 0;
}

body.exercise main.workspace {
  height: calc(100vh - var(--footer-height-exercise));
  min-height: 0;
  overflow: auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr auto;
  gap: 1px;
  background-color: var(--color-secondary-light);
}

body.exercise .statement-container,
body.exercise .testcases-container {
  display: flex;
}

body.exercise .testcases-content {
  max-height: 30vh;
  overflow-y: auto;
}

body.exercise .terminal-section,
body.exercise .testcases-container {
    min-height: var(--exercise-bottom-row-min-height);
}

body.exercise .statement-container { grid-area: 1 / 1 / 2 / 2; }
body.exercise .editor-section      { grid-area: 1 / 2 / 2 / 3; }
body.exercise .terminal-section    { grid-area: 2 / 1 / 3 / 2; }
body.exercise .testcases-container { grid-area: 2 / 2 / 3 / 3; }

body.exercise .editor-section { border-bottom: none; }
body.exercise .terminal-section {
  padding-bottom: var(--footer-height-exercise);
  overflow-y: auto;
}

body.exercise .terminal-section.collapsed {
  min-height: var(--section-header-height) !important;
  height: var(--section-header-height) !important;
  flex-basis: var(--section-header-height) !important;
}

body.exercise .testcases-container {
  min-height: var(--exercise-bottom-row-min-height);
}

.terminal-section.collapsed {
  flex-grow: 0;
  flex-shrink: 0;
  flex-basis: var(--section-header-height);
  height: var(--section-header-height);
  min-height: var(--section-header-height);
  overflow: hidden;
}

.terminal-content pre#output {
  margin: 0;
  font: var(--font-code);
  white-space: pre-wrap;
  word-break: break-all;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--color-text-light);
}

.input-container {
  display: none;
  padding: var(--space-2) var(--space-4);
  border-top: 1px solid var(--color-secondary-light);
  flex-shrink: 0;
  background-color: var(--color-secondary-dark);
  position: relative;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 2;
}
.input-field-container { display: flex; gap: var(--space-2); align-items: center; }
.input-prompt { color: var(--color-accent); font-weight: 600; }
.input-field {
  flex: 1; padding: var(--space-1) var(--space-2); border: 1px solid var(--color-secondary-light);
  border-radius: var(--space-1); background: var(--color-background); color: var(--color-text);
  font: var(--font-code); line-height: 1.4;
}
.input-btn {
  background-color: var(--color-primary); border: none; padding: var(--space-1) var(--space-3);
  border-radius: var(--space-1); cursor: pointer; font-weight: 600; color: var(--color-text);
  font-size: var(--font-tiny);
}
.input-btn:hover { background-color: var(--color-primary-light); }

#terminal-buttons {
  border-top: 1px solid var(--color-secondary-light);
}

.button-container {
  display: flex; gap: var(--space-3); padding: var(--space-2) var(--space-2);
  background: var(--color-secondary-dark);
  flex-shrink: 0;
  align-items: center;
}

button {
  background: var(--color-primary); color: var(--color-text); border: none;
  padding: var(--space-1) var(--space-3); border-radius: var(--space-1);
  cursor: pointer; font-weight: 600; font-family: 'Onest', sans-serif; font-size: var(--font-tiny);
  transition: background-color var(--transition-normal) var(--ease-in-out), transform var(--transition-normal) ease;
}
button:hover { background: var(--color-primary-light); }
button:active { transform: translateY(1px); }
button:disabled { background-color: var(--color-secondary); color: var(--color-text-tertiary); cursor: not-allowed; transform: none; }

#run-btn { background: var(--color-code-hello); }
#run-btn:hover:not(:disabled) { background: #1d4ed8; }

#clear-btn { background: var(--color-error); }
#clear-btn:hover:not(:disabled) { background: #dc2626; }

#run-tests-btn { background: var(--color-info); }
#run-tests-btn:hover:not(:disabled) { background: #2563eb; }
#submit-btn { background: var(--color-accent); }
#submit-btn:hover:not(:disabled) { background: var(--color-accent-dark); }

.toggle-btn {
  background: none; border: none; color: var(--color-text-secondary);
  cursor: pointer; padding: 0 var(--space-1); font-size: 1.2em; line-height: 1;
  transition: color var(--transition-normal) var(--ease-in-out);
}
.toggle-btn:hover { color: var(--color-text); }
.toggle-btn:disabled { color: var(--color-secondary); cursor: not-allowed;}

.terminal-section.collapsed .terminal-content,
.terminal-section.collapsed .input-container,
.terminal-section.collapsed #terminal-buttons {
  display: none;
}

.simulated-title {
  font: var(--font-h3);
  font-weight: 600;
  margin-bottom: var(--space-2);
  color: var(--color-text-primary);
}
.simulated-body {
  font: var(--font-body);
  color: var(--color-text-secondary);
}

body.exercise .terminal-section.collapsed {
  align-self: end;
  padding-bottom: 0;
}

body.exercise:has(.terminal-section.collapsed) .statement-container {
  grid-row: 1 / 3;
}

body.exercise .terminal-section.collapsed {
  align-self: end;
  padding-bottom: 0;
}

body.exercise .terminal-section.collapsed {
  border-top: 1px solid var(--color-secondary-light);
}

body.exercise .terminal-section:not(.collapsed) {
  border-top: none;
}

.editor-brand {
  display: flex;
  align-items: center;
}

.brand-name-start {
  font: var(--font-h3);
  font-weight: 600;
  color: var(--color-text-primary);
}

.brand-name-end {
  font: var(--font-h3);
  font-weight: 600;
  color: var(--color-primary);
}

.brand-logo {
  height: calc(var(--font-small) * 1.3);
  margin-left: var(--space-2);
  max-width: 2.5rem;
  object-fit: contain;
}

.modal {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: var(--color-overlay);
  display: flex; align-items: center; justify-content: center;
  z-index: 100;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal) var(--ease-in-out), visibility 0s linear var(--transition-normal);
}
.modal:not(.hidden) {
  opacity: 1;
  visibility: visible;
  transition: opacity var(--transition-normal) var (--ease-in-out), visibility 0s linear 0s;
}

.modal-content {
  background: var(--color-surface);
  padding: var(--space-5);
  border-radius: var(--space-2);
  width: 90%;
  max-width: 480px;
  min-height: 260px;
  border: 1px solid var(--color-secondary-light);
  box-shadow: 0 8px 16px rgba(0,0,0,0.2), 0 0 0 1px var(--color-secondary-30);
  display: flex;
  flex-direction: column;
  position: relative;
}

.modal-close-btn {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  background: transparent;
  border: none;
  font-size: 1.8rem;
  font-weight: 300;
  color: var(--color-text-secondary);
  cursor: pointer;
  padding: 0;
  line-height: 1;
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--transition-normal) ease;
  z-index: 10;
}
.modal-close-btn:hover {
  color: var(--color-text-primary);
}
.modal-close-btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 1px;
  border-radius: var(--space-1);
}

.modal-content h2 {
  font: var(--font-h3);
  font-weight: 600;
  color: var(--color-text-primary);
  margin: 0 0 var(--space-4) 0;
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-secondary-light);
  padding-right: calc(var(--space-3) + 2rem);
}

.modal-content label {
  display: block;
  margin-bottom: var(--space-2);
  font-size: var(--font-small);
  font-weight: 500;
  color: var(--color-text-secondary);
}

.modal-content input[type="text"] {
  width: 100%;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-secondary-light);
  border-radius: var(--space-1);
  background-color: var(--color-background);
  color: var(--color-text-light);
  font-size: var(--font-body);
  line-height: 1.5;
  margin-bottom: var(--space-1);
  transition: border-color var(--transition-normal) ease, box-shadow var(--transition-normal) ease;
}

.modal-content input[type="text"]:focus {
  border-color: var(--color-primary);
  outline: none;
  box-shadow: 0 0 0 3px var(--color-primary-30);
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
  margin-top: auto;
}

.modal-actions button {
  padding: var(--space-2) var(--space-2);
  font-size: var(--font-small);
}

#cancel-share-btn {
  background-color: var(--color-secondary);
  color: var(--color-text-secondary);
}
#cancel-share-btn:hover:not(:disabled) {
  background-color: var(--color-secondary-light);
  color: var(--color-text);
}

#share-result {
  margin-top: var(--space-4);
  padding: var(--space-3);
  background-color: var(--color-secondary-dark);
  border-radius: var(--space-1);
  border: 1px solid var(--color-secondary-light);
}
#share-result.hidden {
  display: none;
}

#share-result p {
  margin: 0 0 var(--space-2) 0;
  font-size: var(--font-small);
  color: var(--color-text-secondary);
  font-weight: 500;
}

.share-link-container {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

#share-url {
  flex-grow: 1;
  margin-bottom: 0;
  background-color: var(--color-secondary);
  border-color: var (--color-secondary-light);
  cursor: default;
}
#share-url:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-30);
}

#copy-link-btn {
  background-color: var(--color-accent);
  color: var(--color-text-primary);
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-small);
  flex-shrink: 0;
  white-space: nowrap;
}
#copy-link-btn:hover:not(:disabled) {
  background-color: var(--color-accent-dark);
}

#share-error {
  color: #ef4444;
  font-size: 0.95em;
  margin: 0 0 0 0;
  display: none;
  min-height: 1.3em;
}

@media (max-width: 768px) {

  .editor-brand a span.brand-name-start,
  .editor-brand a span.brand-name-end {
    display: none;
  }

  .editor-brand .brand-logo {
    margin-left: 0;
  }

  .section-header {
    padding: var(--space-2) var(--space-3);
  }

  #share-btn {
    padding: var(--space-1) var(--space-2);
    font-size: calc(var(--font-tiny) * 0.9);
  }
}

@media (max-width: 480px) {
  .editor-title-group #file-name {
    font-size: 1.5rem;
  }
  .editor-title-group {
    gap: var(--space-1);
  }

  .chat-panel {
    bottom: 0;
    right: 0;
    left: 0;
    width: auto;
    border-radius: 0;
    box-shadow: none;
    border: none;
  }

  #terminal-buttons button {
    font-size: calc(var(--font-tiny) * 0.9);
    padding: var(--space-1) var(--space-2);
  }

  .chat-fab {
    bottom: 5rem; /* Adjusted from 1rem */
    right: 1rem;
  }
}

#editor-container.cm-container {
  flex: 1 1 auto;
  min-height: 0;
  min-width: 0;
  height: 100%;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding: 0;
}

/* CodeMirror 6: fuerza el editor a ocupar todo el espacio y solo scroll vertical */
.cm-editor {
  flex: 1 1 auto;
  min-height: 0;
  min-width: 0;
  height: 100%;
  width: 100%;
  display: flex;
  flex-direction: column;
  box-sizing: border-box;
  overflow-x: hidden !important;
  overflow-y: auto;
  background: var(--color-background);
  word-break: break-word;
  white-space: pre-wrap;
}

/* El área de líneas y el contenido del editor ocupan todo el alto */
.cm-scroller {
  flex: 1 1 auto;
  min-height: 0;
  min-width: 0;
  height: 100%;
  overflow-x: hidden !important;
  overflow-y: auto;
  word-break: break-word;
  white-space: pre-wrap;
}

/* El contenido del editor: asegura wrap y sin scroll horizontal */
.cm-content {
  padding: 0 0.5rem;
  min-width: 100%;
  box-sizing: border-box;
  min-width: 0 !important;
  width: 100% !important;
  overflow-x: hidden !important;
  word-break: break-word;
  white-space: pre-wrap;
}

/* Ajusta el alto del editor-section para que el editor ocupe todo el espacio */
.editor-section {
  display: flex;
  flex-direction: column;
  flex: 1 1 0%;
  min-height: 0;
  min-width: 0;
  overflow: hidden;
}

/* Ajusta el padding del editor para que no haya espacio extra */
.cm-content {
  padding: 0 0.5rem;
  min-width: 100%;
  box-sizing: border-box;
}

/* Opcional: mejora la visualización de la línea activa */
.cm-activeLine {
  background: var(--color-secondary-30);
}

/* --- PAQUETES MODAL --- */
#packages-modal .modal-content {
  max-width: 520px;
  min-width: 320px;
  min-height: 340px;
  background: var(--color-surface);
  border-radius: var(--space-2);
  box-shadow: 0 8px 24px rgba(0,0,0,0.25), 0 0 0 1px var(--color-secondary-30);
  border: 1px solid var(--color-secondary-light);
  padding: var(--space-5) var(--space-5) var(--space-4) var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

#packages-modal .modal-content h2 {
  font: var(--font-h3);
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-secondary-light);
  padding-bottom: var(--space-2);
}

#packages-modal .modal-content label {
  font-size: var(--font-small);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
  font-weight: 500;
}

#packages-modal .packages-list-section {
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

#packages-modal .packages-list-empty {
  color: var(--color-text-tertiary);
  font-size: var(--font-small);
  padding: var(--space-3) 0;
  text-align: center;
}

#packages-modal .packages-list {
  list-style: none;
  margin: 0;
  padding: 0;
  flex: 1 1 auto;
  overflow-y: auto;
  max-height: 260px;
  border-radius: var(--space-1);
  background: var(--color-secondary-dark);
  border: 1px solid var(--color-secondary-light);
}

#packages-modal .package-list-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid var(--color-secondary-light);
  font-size: var(--font-small);
  background: transparent;
  transition: background 0.2s;
  position: relative;
}
#packages-modal .package-list-item:last-child {
  border-bottom: none;
}
#packages-modal .package-list-item:hover {
  background: var(--color-secondary-30);
}

#packages-modal .package-checkbox {
  accent-color: var(--color-primary);
  width: 1.1em;
  height: 1.1em;
  margin-right: var(--space-2);
  border-radius: 4px;
  border: 1.5px solid var(--color-primary);
  background: var(--color-background);
  cursor: pointer;
  transition: border-color 0.2s;
}
#packages-modal .package-checkbox:disabled {
  accent-color: var(--color-secondary-light);
  border-color: var(--color-secondary-light);
  background: var(--color-secondary);
  cursor: not-allowed;
}

#packages-modal .package-label {
  flex: 1 1 auto;
  color: var(--color-text-primary);
  font-weight: 500;
  cursor: pointer;
  user-select: text;
  transition: color 0.2s;
}
#packages-modal .package-list-item.loaded .package-label {
  color: var(--color-success);
}
#packages-modal .package-list-item.installing .package-label {
  color: var(--color-warning);
}
#packages-modal .package-list-item.error .package-label {
  color: var(--color-error);
}

#packages-modal .package-status {
  margin-left: var(--space-2);
  font-size: var(--font-tiny);
  font-weight: 600;
  color: var(--color-warning);
  vertical-align: middle;
}
#packages-modal .package-list-item.loaded .package-status {
  color: var(--color-success);
}
#packages-modal .package-list-item.error .package-status {
  color: var(--color-error);
}

#packages-modal .packages-list-section {
  margin-bottom: var(--space-2);
}

#packages-modal .packages-list::-webkit-scrollbar {
  width: 8px;
  background: var(--color-secondary-dark);
}
#packages-modal .packages-list::-webkit-scrollbar-thumb {
  background: var(--color-secondary-light);
  border-radius: 4px;
}

/* Buscador de paquetes */
#packages-modal #package-search-input {
  width: 100%;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-secondary-light);
  border-radius: var(--space-1);
  background: var(--color-background);
  color: var(--color-text-light);
  font-size: var(--font-small);
  margin-bottom: var(--space-2);
  transition: border-color 0.2s, box-shadow 0.2s;
  position: sticky;
  top: 0;
  z-index: 2;
  background: var(--color-surface);
}
#packages-modal #package-search-input:focus {
  border-color: var(--color-primary);
  outline: none;
  box-shadow: 0 0 0 2px var(--color-primary-30);
}

/* Mensaje de carga */
#packages-modal #packages-loading-msg {
  color: var(--color-warning);
  font-size: var(--font-small);
  padding: var(--space-2) 0;
  text-align: center;
}

/* Responsive */
@media (max-width: 600px) {
  #packages-modal .modal-content {
    max-width: 98vw;
    min-width: 0;
    padding: var(--space-3) var(--space-2);
  }
}

.terminal-section {
  display: flex;
  flex-direction: column;
  position: relative;
  min-height: 0;
}

.terminal-content {
  flex: 1 1 auto;
  overflow-y: auto;
  padding: var(--space-2) var(--space-4);
  min-height: 0;
}

.input-container {
  display: none;
  padding: var(--space-2) var(--space-4);
  border-top: 1px solid var(--color-secondary-light);
  flex-shrink: 0;
  background-color: var(--color-secondary-dark);
  position: relative;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 2;
}

.terminal-section .input-container[style*="display: flex"] {
  display: flex !important;
}

::-webkit-scrollbar {
  width: 10px;
  background: var(--color-secondary-dark);
}
::-webkit-scrollbar-thumb {
  background: var(--color-secondary-light);
  border-radius: 6px;
  border: 2px solid var(--color-secondary-dark);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary-50);
}
::-webkit-scrollbar-corner {
  background: var(--color-secondary-dark);
}

* {
  scrollbar-width: thin;
  scrollbar-color: var(--color-secondary-light) var(--color-secondary-dark);
}

.terminal-resizer {
  width: 100%;
  height: 1px;
  background-color: var(--color-secondary-light);
  cursor: ns-resize;
  position: relative;
  transition: background-color var(--transition-normal) ease;
}

.terminal-resizer::before {
  content: '';
  position: absolute;
  top: -4px;
  bottom: -4px;
  left: 0;
  right: 0;
}

.terminal-resizer:hover,
.terminal-resizer.active {
  background-color: var(--color-primary);
}

.terminal-section.collapsed .terminal-resizer {
  display: none;
}

/* --- MATPLOTLIB MODAL --- */
#matplotlib-modal .modal-content {
  max-width: 600px;
  min-width: 320px;
  min-height: 340px;
  background: var(--color-surface);
  border-radius: var(--space-2);
  box-shadow: 0 8px 24px rgba(0,0,0,0.25), 0 0 0 1px var(--color-secondary-30);
  border: 1px solid var(--color-secondary-light);
  padding: var(--space-5) var(--space-5) var(--space-4) var(--space-5);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
}

#matplotlib-modal .modal-content h2 {
  font: var(--font-h3);
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-secondary-light);
  padding-bottom: var(--space-2);
  width: 100%;
  text-align: center;
}

#matplotlib-modal .modal-content img#matplotlib-img {
  max-width: 100%;
  max-height: 400px;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
  margin-top: 1rem;
  background: var(--color-background);
}

#matplotlib-modal .modal-content #matplotlib-error {
  color: var(--color-error);
  font-size: var(--font-small);
  margin: 0 0 var(--space-2) 0;
  display: none;
  min-height: 1.3em;
  width: 100%;
  text-align: center;
}

/* Botón de descarga en el modal de matplotlib */
#matplotlib-download-btn {
  background-color: var(--color-accent);
  color: var(--color-text-primary);
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-small);
  border-radius: var(--space-1);
  margin-top: var(--space-3);
  border: none;
  cursor: pointer;
  font-weight: 600;
  transition: background-color var(--transition-normal) var(--ease-in-out);
}
#matplotlib-download-btn:hover:not(:disabled) {
  background-color: var(--color-accent-dark);
}

/* === CHAT SYSTEM === */

/* FAB (Floating Action Button) */
.chat-fab {
  position: fixed;
  bottom: 4.5rem;
  right: 2rem;
  width: 4rem;
  height: 4rem;
  background: var(--color-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3), 0 2px 8px rgba(249, 100, 32, 0.4);
  cursor: pointer;
  transition: all var(--transition-normal) var(--ease-in-out);
  z-index: 1000;
  user-select: none;
  overflow: visible;
  transform: translateX(0);
  opacity: 1;
  visibility: visible;
}

.chat-fab:hover {
  background: var(--color-primary-light);
  transform: translateX(0) scale(1.05);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4), 0 3px 12px rgba(249, 100, 32, 0.5);
}

.chat-fab.dragging {
  transition: none;
  cursor: grabbing;
  z-index: 1001;
}

.chat-fab.hidden-right {
  right: -3rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  background: var(--color-primary-80);
  transform: translateX(0);
}

.chat-fab.hidden-right:hover {
  right: -2.5rem;
  background: var(--color-primary);
  transform: translateX(0);
}

.chat-fab.chat-open {
  opacity: 0;
  visibility: hidden;
  transform: translateX(0) scale(0.8);
}

.chat-fab.chat-minimized {
  opacity: 0;
  visibility: hidden;
  transform: translateX(0) scale(0.8);
}

.chat-fab i {
  font-size: 1.5rem;
  color: var(--color-text-primary);
  transition: all var(--transition-normal) var(--ease-in-out);
}

.chat-fab-text {
  position: absolute;
  right: 4.5rem;
  background: var(--color-secondary-dark);
  color: var(--color-text-primary);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--space-1);
  font-size: var(--font-tiny);
  font-weight: 600;
  white-space: nowrap;
  opacity: 0;
  transform: translateX(1rem);
  transition: all var(--transition-normal) var(--ease-in-out);
  pointer-events: none;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.chat-fab:hover:not(.dragging):not(.hidden-right):not(.chat-open):not(.chat-minimized) .chat-fab-text {
  opacity: 1;
  transform: translateX(0);
}

.chat-fab.hidden-right .chat-fab-text,
.chat-fab.dragging .chat-fab-text,
.chat-fab.chat-open .chat-fab-text,
.chat-fab.chat-minimized .chat-fab-text {
  opacity: 0;
}

.chat-fab.hidden-right i {
  font-size: 1rem;
}

/* Chat Panel */
.chat-panel {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 800px;
  height: 500px;
  background: var(--color-surface);
  border-radius: var(--space-3);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3), 0 0 0 1px var(--color-secondary-30);
  border: 1px solid var(--color-secondary-light);
  display: flex;
  flex-direction: column;
  z-index: 999;
  opacity: 0;
  transform: translateY(2rem) scale(0.95);
  transition: opacity var(--transition-normal) var(--ease-in-out), 
              transform var(--transition-normal) var(--ease-in-out),
              visibility 0s linear var(--transition-normal);
  overflow: hidden;
  visibility: hidden;
  pointer-events: none;
}

.chat-panel:not(.hidden) {
  opacity: 1;
  transform: translateY(0) scale(1);
  visibility: visible;
  pointer-events: auto;
  transition: opacity var(--transition-normal) var(--ease-in-out), 
              transform var(--transition-normal) var(--ease-in-out),
              visibility 0s linear 0s; 
}

.chat-panel.minimized {
  height: 3.5rem;
  overflow: hidden;
}

/* Chat Header */
.chat-header {
  background: var(--color-secondary-dark);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-secondary-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-shrink: 0;
  border-radius: var(--space-3) var(--space-3) 0 0;
}

.chat-header h3 {
  font: var(--font-h4);
  font-weight: 600;
  color: var(--color-text-primary);
  margin: 0;
}

.chat-controls {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.chat-counter {
  font: var(--font-tiny);
  color: var(--color-text-tertiary);
  background: var(--color-secondary);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--space-1);
  font-weight: 600;
}

.chat-control-btn {
  background: none;
  border: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  padding: var(--space-1);
  border-radius: var(--space-1);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal) ease;
  width: 1.75rem;
  height: 1.75rem;
}

.chat-control-btn:hover {
  background: var(--color-secondary);
  color: var(--color-text-primary);
}

.chat-control-btn i {
  font-size: 0.875rem;
}

/* Chat Messages */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.chat-message {
  display: flex;
  flex-direction: column;
  max-width: 85%;
  animation: fadeInUp 0.3s ease-out;
}

.chat-message.user {
  align-self: flex-end;
}

.chat-message.assistant {
  align-self: flex-start;
}

.chat-message.system {
  align-self: center;
  max-width: 100%;
}

.chat-message-content {
  padding: var(--space-2) var(--space-3);
  border-radius: var(--space-2);
  font-size: var(--font-small);
  line-height: 1.5;
  word-wrap: break-word;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.chat-message.user .chat-message-content {
  background: var(--color-primary);
  color: var (--color-text-primary);
  border-bottom-right-radius: var(--space-1);
}

.chat-message.assistant .chat-message-content {
  background: var(--color-secondary-dark);
  color: var(--color-text-light);
  border: 1px solid var(--color-secondary-light);
  border-bottom-left-radius: var(--space-1);
}

.chat-message.system .chat-message-content {
  background: var(--color-secondary);
  color: var(--color-text-secondary);
  border-radius: var(--space-2);
  text-align: center;
  font-size: var(--font-tiny);
}

.chat-message-content p {
  margin: 0;
}

.chat-message-content p + p {
  margin-top: var(--space-2);
}

.chat-message-content code {
  background: rgba(255, 255, 255, 0.1);
  padding: 0.125rem 0.25rem;
  border-radius: 0.25rem;
  font-family: var(--font-code);
  font-size: 0.8em;
}

.chat-message-content pre {
  background: rgba(0, 0, 0, 0.2);
  padding: var(--space-2);
  border-radius: var(--space-1);
  overflow-x: auto;
  margin: var(--space-2) 0;
}

.chat-message-content pre code {
  background: none;
  padding: 0;
}

/* Styles for code block actions in chat */
.chat-code-block-wrapper {
  position: relative;
  margin: var(--space-2) 0;
}

.chat-code-block-wrapper > pre {
  margin: 0; 
}

.chat-code-actions {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  display: flex;
  gap: 0.5rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease-in-out, visibility 0.2s ease-in-out;
  z-index: 1; 
}

.chat-code-block-wrapper:hover .chat-code-actions {
  opacity: 1;
  visibility: visible;
}

.chat-code-action-btn {
  background-color: var(--color-secondary);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-secondary-light);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--space-1);
  cursor: pointer;
  font-size: var(--font-tiny);
  font-family: var(--font-body);
  display: flex;
  align-items: center;
  gap: var(--space-1);
  transition: background-color 0.2s, color 0.2s;
  line-height: 1.2;
}

.chat-code-action-btn:hover {
  background-color: var(--color-secondary-light);
  color: var(--color-text-primary);
}

.chat-code-action-btn i {
  font-size: 0.9em;
  line-height: 1;
}


/* Typing Indicator */
.chat-typing {
  align-self: flex-start;
  max-width: 85%;
}

.chat-typing .chat-message-content {
  background: var(--color-secondary-dark);
  border: 1px solid var(--color-secondary-light);
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
}

.typing-dots {
  display: flex;
  gap: 0.25rem;
}

.typing-dot {
  width: 0.5rem;
  height: 0.5rem;
  background: var(--color-text-tertiary);
  border-radius: 50%;
  animation: typingDot 1.4s infinite ease-in-out;
}

.typing-dot:nth-child(1) { animation-delay: -0.32s; }
.typing-dot:nth-child(2) { animation-delay: -0.16s; }

/* Chat Input */
.chat-input-container {
  padding: var(--space-3);
  border-top: 1px solid var (--color-secondary-light);
  background: var(--color-surface);
  flex-shrink: 0;
  border-radius: 0 0 var(--space-3) var(--space-3);
}

.chat-input-wrapper {
  display: flex;
  align-items: flex-end;
  gap: var(--space-2);
  background: var(--color-secondary-dark);
  border: 1px solid var(--color-secondary-light);
  border-radius: var(--space-2);
  padding: var(--space-2);
  transition: border-color var(--transition-normal) ease;
}

.chat-input-wrapper:focus-within {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px var(--color-primary-30);
}

.chat-input {
  flex: 1;
  background: none;
  border: none;
  color: var(--color-text-light);
  font: var(--font-small);
  line-height: 1.4;
  resize: none;
  outline: none;
  min-height: 1.5rem;
  max-height: 6rem;
  overflow-y: auto;
  padding: 0;
}

.chat-input::placeholder {
  color: var(--color-text-tertiary);
}

.chat-send-btn {
  background: var(--color-primary);
  border: none;
  color: var(--color-text-primary);
  width: 2rem;
  height: 2rem;
  border-radius: var(--space-1);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal) ease;
  flex-shrink: 0;
}

.chat-send-btn:hover:not(:disabled) {
  background: var(--color-primary-light);
  transform: scale(1.05);
}

.chat-send-btn:disabled {
  background: var(--color-secondary);
  color: var(--color-text-tertiary);
  cursor: not-allowed;
  transform: none;
}

.chat-send-btn i {
  font-size: 0.875rem;
}

.chat-code-btn {
  background: var(--color-secondary-light);
  border: none;
  color: var(--color-text-primary);
  width: 2rem;
  height: 2rem;
  border-radius: var(--space-1);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal) ease;
  flex-shrink: 0;
}

.chat-code-btn:hover:not(:disabled) {
  background: var(--color-secondary);
  transform: scale(1.05);
}

.chat-code-btn:disabled {
  background: var(--color-secondary);
  color: var(--color-text-tertiary);
  cursor: not-allowed;
  transform: none;
}

.chat-code-btn.active {
  background: var(--color-primary);
  color: var(--color-text-primary);
}

.chat-code-btn i {
  font-size: 0.875rem;
}

.chat-code-selection-indicator {
  background-color: var(--color-secondary);
  color: var(--color-text-tertiary);
  padding: 0.2rem 0.5rem;
  border-radius: var(--space-1);
  font-size: var(--font-tiny);
  font-weight: 600;
  white-space: nowrap;
  margin-right: var(--space-2);
  align-self: center;
  transition: opacity 0.2s ease, transform 0.2s ease;
  line-height: 1.4;
}

.chat-code-selection-indicator.hidden {
  display: none;
}

/* Chat Limit Reached */
.chat-limit-reached {
  padding: var(--space-4);
  border-top: 1px solid var(--color-secondary-light);
  background: var(--color-surface);
  flex-shrink: 0;
  border-radius: 0 0 var(--space-3) var(--space-3);
}

.chat-limit-reached.hidden {
  display: none;
}

.chat-limit-message {
  text-align: center;
  color: var(--color-text-secondary);
}

.chat-limit-message i {
  font-size: 2rem;
  color: var(--color-warning);
  margin-bottom: var(--space-2);
  display: block;
}

.chat-limit-message p {
  margin: 0 0 var(--space-3) 0;
  font-size: var(--font-small);
}

.chat-new-conversation-btn {
  background: var(--color-accent);
  color: var(--color-text-primary);
  border: none;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--space-2);
  cursor: pointer;
  font-weight: 600;
  font-size: var(--font-small);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin: 0 auto;
  transition: background-color var(--transition-normal) ease;
}

.chat-new-conversation-btn:hover {
  background: var(--color-accent-dark);
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(1rem);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes typingDot {
  0%, 80%, 100% {
    transform: scale(0);
  }
  40% {
    transform: scale(1);
  }
}

/* Responsive Chat */
@media (max-width: 768px) {
  .chat-panel {
    bottom: 1rem;
    right: 1rem;
    left: 1rem;
    width: auto;
    border-radius: 0;
    box-shadow: none;
    border: none;
  }
  
  .chat-fab {
    bottom: 5rem;
    right: 1rem;
  }
}

@media (max-width: 480px) {
  .chat-panel {
    bottom: 0;
    right: 0;
    left: 0;
    width: auto;
    border-radius: 0;
    box-shadow: none;
    border: none;
  }
  
  .chat-header {
    border-radius: 0;
  }
  
  .chat-input-container {
    border-radius: 0;
  }
  
  .chat-limit-reached {
    border-radius: 0;
  }

  .chat-fab {
    bottom: 5rem;
    right: 1rem;
  }

  #terminal-buttons button {
    font-size: calc(var(--font-tiny) * 0.9);
    padding: var(--space-1) var(--space-2);
  }
}

/* Scrollbar for chat messages */
.chat-messages::-webkit-scrollbar {
  width: 6px;
}

.chat-messages::-webkit-scrollbar-track {
  background: transparent;
}

.chat-messages::-webkit-scrollbar-thumb {
  background: var(--color-secondary-light);
  border-radius: 3px;
}

.chat-messages::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary-50);
}