:root {
  --bg: #e9edf5;
  --grid-dot: #c3cbdb;
  --ink: #1b2233;
  --ink-soft: #4a536b;
  --panel: #ffffff;
  --panel-border: #d6dceb;
  --accent: #2f5fd6;
  --accent-soft: #e4ebfc;
  --true-color: #1f9d55;
  --false-color: #d64545;
  --edge-color: #5b6579;
  --danger-bg: #fdecec;
  --mono: ui-monospace, "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, monospace;
  --sans: -apple-system, "Segoe UI", system-ui, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--bg);
}

body {
  display: grid;
  grid-template-rows: auto 1fr;
  height: 100vh;
  overflow: hidden;
}

/* ---------- Top bar ---------- */

header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background: var(--panel);
  border-bottom: 1px solid var(--panel-border);
  z-index: 5;
}

header h1 {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.01em;
  margin: 0 auto 0 8px;
  white-space: nowrap;
}

header h1 span {
  color: var(--accent);
}

.menu-trigger {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 1px solid var(--panel-border);
  background: var(--panel);
  color: var(--ink);
  padding: 8px 11px;
  border-radius: 6px;
  font-size: 14px;
  font-family: var(--sans);
  cursor: pointer;
  transition: background 0.12s, border-color 0.12s;
  min-width: 38px;
}

.menu-trigger svg { width: 18px; height: 18px; flex: none; }

.menu-trigger:hover { border-color: var(--accent); }

.menu-trigger.open {
  background: var(--accent-soft);
  border-color: var(--accent);
}

.menu-trigger.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
  margin-left: 0;
}

.menu-trigger.primary:hover { border-color: #fff; opacity: 0.92; }

.menu-trigger.accent-icon { color: var(--accent); border-color: var(--accent); background: var(--accent-soft); }
.menu-trigger.accent-icon:hover { background: var(--accent); color: #fff; }

/* Botón partido de Run: el ícono (ejecuta el modo actual) + una flechita
   angosta al lado (abre el desplegable para elegir el modo). */
.split-button {
  display: flex;
  margin-left: auto;
}

.split-button #btn-run-main {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
  border-right: 1px solid rgba(255, 255, 255, 0.35);
}

.split-button .caret {
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
  min-width: 22px;
  padding: 8px 6px;
  font-size: 10px;
}

/* ---------- Menús desplegables (Archivo / Formas / Run / Ayuda) ---------- */
/* El mismo componente en PC y celular: un panel flotante anclado justo
   debajo del botón que lo abrió, posicionado con JS (getBoundingClientRect)
   para que siempre quede visible sin importar el tamaño de pantalla. */

#menu-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 25;
  background: transparent;
}

#menu-backdrop.active { display: block; }

.dropdown-menu {
  display: none;
  position: fixed;
  z-index: 30;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  box-shadow: 0 10px 30px rgba(20, 26, 40, 0.2);
  padding: 8px;
  max-height: 75vh;
  max-width: 90vw;
  overflow-y: auto;
}

.dropdown-menu.active { display: block; }

.dropdown-menu button {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  min-width: 170px;
  text-align: left;
  border: none;
  background: none;
  padding: 10px 12px;
  border-radius: 6px;
  font-size: 13.5px;
  font-family: var(--sans);
  color: var(--ink);
  cursor: pointer;
}

.dropdown-menu button:hover { background: var(--accent-soft); }

.dropdown-menu button.armed { background: var(--accent); color: #fff; }

.dropdown-menu button.primary { background: var(--accent); color: #fff; font-weight: 600; }
.dropdown-menu button.primary:hover { filter: brightness(1.08); }

.dropdown-menu button svg { width: 18px; height: 18px; flex: none; }

#menu-panel-formas .toolbar {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

#help-popover {
  width: 300px;
  padding: 12px 14px;
}

#help-popover ul {
  margin: 0;
  padding-left: 18px;
  font-size: 12.5px;
  color: var(--ink-soft);
  line-height: 1.65;
}

#help-popover strong { color: var(--ink); }

#help-popover kbd {
  font-family: var(--mono);
  background: var(--bg);
  border: 1px solid var(--panel-border);
  border-radius: 3px;
  padding: 0 4px;
  font-size: 11px;
}



/* ---------- Layout ---------- */

main {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(280px, 1fr);
  min-height: 0;
}

#canvas-wrap {
  position: relative;
  overflow: auto;
  background-image: radial-gradient(circle, var(--grid-dot) 1px, transparent 1px);
  background-size: 22px 22px;
}

#canvas { display: block; }

/* ---------- Sidebar ---------- */

aside {
  border-left: 1px solid var(--panel-border);
  background: var(--panel);
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.tabs {
  display: flex;
  border-bottom: 1px solid var(--panel-border);
}

.tabs button {
  flex: 1;
  border: none;
  background: none;
  padding: 10px 8px;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--ink-soft);
  cursor: pointer;
  border-bottom: 2px solid transparent;
}

.tabs button.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.tab-panel {
  flex: 1;
  overflow-y: auto;
  padding: 12px;
  display: none;
  font-size: 13px;
}

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

#vars-scope-label {
  font-size: 11.5px;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 6px 8px;
  border-radius: 5px;
  margin-bottom: 8px;
}
#vars-scope-label:empty { display: none; }

#vars-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 12px;
}

#vars-table th {
  text-align: left;
  color: var(--ink-soft);
  font-weight: 600;
  padding: 4px 6px;
  border-bottom: 1px solid var(--panel-border);
}

#vars-table td {
  padding: 4px 6px;
  border-bottom: 1px solid #f0f2f7;
  vertical-align: top;
}

#console-log {
  font-family: var(--mono);
  font-size: 12.5px;
  white-space: pre-wrap;
  line-height: 1.5;
}

#console-log .err {
  background: var(--danger-bg);
  color: var(--false-color);
  padding: 4px 6px;
  border-radius: 4px;
  display: block;
  margin: 4px 0;
}

#tab-codigo { padding: 0; display: none; flex-direction: column; }
#tab-codigo.active { display: flex; }

#codigo-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 8px 10px;
  border-bottom: 1px solid var(--panel-border);
  flex: none;
}

#codigo-status {
  font-size: 11.5px;
  color: var(--false-color);
}

#btn-copy-code {
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--panel-border);
  background: var(--panel);
  color: var(--ink);
  width: 30px;
  height: 30px;
  padding: 0;
  border-radius: 5px;
  cursor: pointer;
  flex: none;
}
#btn-copy-code svg { width: 16px; height: 16px; }
#btn-copy-code:hover { border-color: var(--accent); color: var(--accent); }

#codigo-pre {
  margin: 0;
  padding: 12px;
  overflow: auto;
  flex: 1;
  font-size: 12px;
}

#codigo-output { font-family: var(--mono); }

#input-prompt {
  margin-top: 10px;
  padding: 10px;
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  border-radius: 6px;
  display: none;
}

#input-prompt.active { display: block; }

#input-prompt label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 6px;
}

#input-prompt .row { display: flex; gap: 6px; }

#input-prompt input {
  flex: 1;
  padding: 5px 8px;
  border: 1px solid var(--panel-border);
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 12.5px;
}

#input-prompt button {
  border: none;
  background: var(--accent);
  color: #fff;
  padding: 5px 12px;
  border-radius: 4px;
  font-size: 12.5px;
  cursor: pointer;
}

/* ---------- Nodes / edges ---------- */

.node-shape {
  fill: #ffffff;
  stroke: var(--ink);
  stroke-width: 1.6;
}

.node { touch-action: pinch-zoom; }

.node.selected .node-shape { stroke: var(--accent); stroke-width: 2.4; }
.node.current .node-shape {
  stroke: var(--accent);
  stroke-width: 3;
  filter: drop-shadow(0 0 5px rgba(47, 95, 214, 0.55));
}
.node.error .node-shape { stroke: var(--false-color); stroke-width: 2.6; }

.node[data-type="start"] .node-shape,
.node[data-type="end"] .node-shape,
.node[data-type="connector"] .node-shape { fill: #f5f7fc; }

.node[data-type="decision"] .node-shape { fill: #fff8ec; }
.node[data-type="input"] .node-shape,
.node[data-type="output"] .node-shape { fill: #f0f7ff; }
.node[data-type="for"] .node-shape { fill: #f4f0ff; }
.node[data-type="declaration"] .node-shape { fill: #eaf7ee; stroke: #2f9e56; }
.node[data-type="subprogram"] .node-shape { fill: #f5f7fc; }
.node[data-type="switch"] .node-shape { fill: #eaf2ff; stroke: #2f6fd6; }

.node text {
  font-family: var(--mono);
  font-size: 11.5px;
  fill: var(--ink);
  pointer-events: none;
  user-select: none;
}

.node .for-label,
.node .switch-case-label {
  font-family: var(--mono);
  font-size: 10px;
  fill: var(--ink);
  pointer-events: none;
  user-select: none;
}

.node .type-label {
  font-family: var(--sans);
  font-size: 9.5px;
  font-weight: 700;
  fill: var(--ink-soft);
  letter-spacing: 0.04em;
}

.port {
  fill: #fff;
  stroke: var(--ink-soft);
  stroke-width: 1.4;
  cursor: crosshair;
  touch-action: pinch-zoom;
}

.port:hover { stroke: var(--accent); fill: var(--accent-soft); }
.port.port-true { stroke: var(--true-color); }
.port.port-false { stroke: var(--false-color); }

/* Anclajes de entrada: sutiles por defecto, se resaltan al pasar el
   mouse o mientras se está arrastrando una conexión (clase .connecting
   en <body>), para que sea obvio dónde se puede soltar. */
.anchor-point {
  fill: var(--panel);
  stroke: var(--ink-soft);
  stroke-width: 1;
  opacity: 0.35;
  touch-action: pinch-zoom;
}
.anchor-point.draggable { cursor: crosshair; }
.anchor-point:hover { opacity: 1; fill: var(--accent-soft); stroke: var(--accent); }
body.connecting .anchor-point { opacity: 0.85; }
body.connecting .anchor-point:hover { opacity: 1; fill: var(--accent); stroke: var(--accent); }

.port-label {
  font-family: var(--sans);
  font-size: 9px;
  font-weight: 700;
  pointer-events: none;
}
.port-label.true { fill: var(--true-color); }
.port-label.false { fill: var(--false-color); }

.resize-handle {
  fill: #fff;
  stroke: var(--ink-soft);
  stroke-width: 1.2;
  cursor: nwse-resize;
  opacity: 0.55;
  touch-action: pinch-zoom;
}
.node:hover .resize-handle,
.node.selected .resize-handle { opacity: 1; stroke: var(--accent); }
.resize-handle:hover { fill: var(--accent-soft); }

.node .edit-badge circle {
  fill: var(--accent);
  stroke: #fff;
  stroke-width: 1.5;
  cursor: pointer;
  touch-action: pinch-zoom;
}
.node .edit-badge text {
  font-size: 11px;
  fill: #fff;
  pointer-events: none;
}

.edge-path {
  fill: none;
  stroke: var(--edge-color);
  stroke-width: 1.8;
}
.edge-path.true { stroke: var(--true-color); }
.edge-path.false { stroke: var(--false-color); }
.edge-path.selected { stroke: var(--accent); stroke-width: 2.6; }

.edge-hit {
  fill: none;
  stroke: transparent;
  stroke-width: 14;
  cursor: pointer;
}

.temp-edge {
  fill: none;
  stroke: var(--accent);
  stroke-width: 1.8;
  stroke-dasharray: 4 3;
  pointer-events: none;
}

/* ---------- Property panel (modal) ---------- */

#overlay {
  position: fixed;
  inset: 0;
  background: rgba(20, 26, 40, 0.35);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 20;
}

#overlay.active { display: flex; }

#prop-panel {
  background: #fff;
  border-radius: 10px;
  padding: 18px 20px;
  width: 380px;
  box-shadow: 0 12px 40px rgba(20, 26, 40, 0.25);
}

#prop-panel h2 {
  font-size: 13px;
  margin: 0 0 14px;
  color: var(--ink-soft);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

#prop-fields label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  margin: 10px 0 4px;
}

#prop-fields input[type="text"],
#prop-fields textarea,
#prop-fields select {
  width: 100%;
  padding: 6px 8px;
  border: 1px solid var(--panel-border);
  border-radius: 5px;
  font-family: var(--mono);
  font-size: 12.5px;
}

#prop-fields textarea { min-height: 64px; resize: vertical; }

.decl-legend {
  display: flex;
  gap: 6px;
  margin-top: 10px;
  font-size: 10.5px;
  font-weight: 600;
  color: var(--ink-soft);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.decl-legend span:first-child { flex: 1; }
.decl-legend span:last-child { flex: none; width: 96px; }

#decl-rows { display: flex; flex-direction: column; gap: 10px; margin-top: 8px; }

#switch-rows { display: flex; flex-direction: column; gap: 6px; margin-top: 8px; }
.switch-row { display: flex; gap: 6px; align-items: center; }
.switch-row .switch-valor {
  flex: 1;
  min-width: 0;
  width: auto;
  padding: 6px 7px;
  border: 1px solid var(--panel-border);
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 12.5px;
}

.decl-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 8px;
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  background: var(--bg);
}

.decl-row-top {
  display: flex;
  gap: 6px;
  align-items: center;
}
#prop-fields .decl-row-top .decl-nombre { flex: 1; min-width: 0; width: auto; }
#prop-fields .decl-row-top .decl-tipo { flex: none; width: 96px; }

.decl-row-bottom {
  display: flex;
  gap: 8px;
  align-items: center;
}
#prop-fields .decl-row-bottom .decl-valor { flex: 1; min-width: 0; width: auto; }

.decl-global-label {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 11.5px;
  color: var(--ink-soft);
  white-space: nowrap;
  flex: none;
}
.decl-global-label input { width: auto; }

.decl-row input,
.decl-row select {
  padding: 6px 7px;
  border: 1px solid var(--panel-border);
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 12.5px;
}

.decl-del {
  border: none;
  background: var(--danger-bg);
  color: var(--false-color);
  border-radius: 4px;
  width: 26px;
  height: 26px;
  flex: none;
  cursor: pointer;
  font-size: 12px;
}

.decl-add {
  margin-top: 4px;
  border: 1px dashed var(--panel-border);
  background: none;
  color: var(--accent);
  border-radius: 5px;
  padding: 6px 10px;
  font-size: 12.5px;
  cursor: pointer;
  width: 100%;
}
.decl-add:hover { border-color: var(--accent); background: var(--accent-soft); }

#prop-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 16px;
}

#prop-actions button {
  border: none;
  padding: 7px 14px;
  border-radius: 5px;
  font-size: 12.5px;
  cursor: pointer;
}

#prop-actions .save { background: var(--accent); color: #fff; font-weight: 600; }
#prop-actions .cancel { background: #eef1f6; color: var(--ink); }
#prop-actions .delete { background: var(--danger-bg); color: var(--false-color); margin-right: auto; }

/* ---------- Celular / pantallas angostas ---------- */

@media (max-width: 760px) {
  header { gap: 6px; padding: 8px 10px; }

  header h1 { font-size: 13px; margin: 0 auto; }

  .menu-trigger { padding: 8px 10px; font-size: 12px; }

  main {
    grid-template-columns: 1fr;
    grid-template-rows: 1fr minmax(200px, 40vh);
  }

  aside { border-left: none; border-top: 1px solid var(--panel-border); }

  #prop-panel { width: 92vw; max-width: 380px; }

  #help-popover,
  #menu-panel-archivo,
  #menu-panel-run { width: 88vw; max-width: 320px; }

  #menu-panel-formas { width: 80vw; max-width: 280px; }

  /* La pestaña "Código" pasa a ocupar toda la pantalla (con la barra de
     pestañas arriba, para poder volver a Variables/Consola tocándola) --
     en el panel angosto de abajo, el código apenas se alcanzaba a leer. */
  aside:has(#tab-codigo.active) {
    position: fixed;
    inset: 0;
    z-index: 40;
    border: none;
  }
}

/* Objetivos táctiles algo más grandes cuando el dispositivo es táctil
   (no tiene mouse de precisión), independientemente del ancho de pantalla. */
@media (pointer: coarse) {
  .resize-handle { opacity: 0.85; }
}