:root {
  --bg: #0f172a;
  --panel: #1e293b;
  --panel-border: #334155;
  --text: #e2e8f0;
  --text-dim: #94a3b8;
  --accent: #38bdf8;
  --accent-2: #facc15;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif; background: var(--bg); color: var(--text); }

#appRoot { display: flex; flex-direction: column; height: 100vh; }

#topBar {
  display: flex; align-items: center; gap: 12px;
  padding: 8px 14px; background: var(--panel); border-bottom: 1px solid var(--panel-border);
  flex-shrink: 0;
}
.brand { font-weight: 700; font-size: 16px; margin-right: 8px; }
.brand span { color: var(--accent); }
.top-actions { display: flex; align-items: center; gap: 6px; }
.top-btn {
  background: #334155; color: var(--text); border: 1px solid #475569; border-radius: 6px;
  padding: 6px 10px; font-size: 13px; cursor: pointer;
}
.top-btn:hover { background: #475569; }
.sep { width: 1px; height: 20px; background: #475569; margin: 0 4px; }

.dropdown { position: relative; display: inline-block; }
.dropdown-menu {
  display: none; position: absolute; top: 100%; left: 0; background: var(--panel);
  border: 1px solid var(--panel-border); border-radius: 6px; min-width: 120px; z-index: 20;
  flex-direction: column; padding: 4px;
}
.dropdown:hover .dropdown-menu { display: flex; }
.dropdown-menu button {
  background: transparent; border: none; color: var(--text); text-align: left;
  padding: 6px 10px; border-radius: 4px; cursor: pointer; font-size: 13px;
}
.dropdown-menu button:hover { background: #334155; }

/* Cinta (ribbon): pestañas + grupos con icono+texto, sustituye la barra lateral de iconos */
#ribbon { background: var(--panel); border-bottom: 1px solid var(--panel-border); flex-shrink: 0; }
.ribbon-tabs { display: flex; gap: 2px; padding: 4px 10px 0; }
.ribbon-tab {
  background: transparent; border: none; color: var(--text-dim); font-size: 13px;
  padding: 6px 14px; cursor: pointer; border-radius: 6px 6px 0 0;
}
.ribbon-tab:hover { color: var(--text); }
.ribbon-tab.active { color: var(--text); background: var(--bg); }
.ribbon-panels { background: var(--bg); border-top: 1px solid var(--panel-border); }
.ribbon-panel { display: none; align-items: stretch; gap: 0; padding: 6px 10px; overflow-x: auto; }
.ribbon-panel.active { display: flex; }
.ribbon-group {
  display: flex; flex-direction: column; align-items: center; justify-content: space-between;
  padding: 2px 10px; border-right: 1px solid var(--panel-border); flex-shrink: 0;
}
.ribbon-group:last-child { border-right: none; }
.ribbon-group-buttons { display: flex; align-items: flex-start; gap: 2px; }
.ribbon-group-buttons--grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 2px; }
.ribbon-btn {
  display: flex; flex-direction: column; align-items: center; gap: 2px;
  width: 56px; background: transparent; border: 1px solid transparent; border-radius: 6px;
  color: var(--text); font-size: 10px; padding: 5px 2px; cursor: pointer; line-height: 1.2;
}
.ribbon-btn:hover { background: #1e293b; border-color: var(--panel-border); }
.ribbon-btn.active { background: var(--accent); color: #0f172a; }
.ribbon-icon { font-size: 17px; }
.ribbon-group-title { font-size: 10px; color: var(--text-dim); margin-top: 4px; }

/* Pestañas de dibujos abiertos, estilo pestañas de navegador */
#docTabs {
  display: flex; align-items: center; gap: 2px; background: var(--bg);
  border-bottom: 1px solid var(--panel-border); padding: 4px 8px 0; flex-shrink: 0; overflow-x: auto;
}
#docTabs:empty { display: none; }
.doc-tab {
  display: flex; align-items: center; gap: 6px; background: var(--panel); color: var(--text-dim);
  border: 1px solid var(--panel-border); border-bottom: none; border-radius: 6px 6px 0 0;
  padding: 6px 8px 6px 12px; font-size: 12px; cursor: pointer; max-width: 160px; flex-shrink: 0;
}
.doc-tab.active { color: var(--text); background: var(--bg); }
.doc-tab .doc-tab-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.doc-tab .doc-tab-close { background: none; border: none; color: inherit; cursor: pointer; font-size: 12px; padding: 0 2px; }
.doc-tab .doc-tab-close:hover { color: #f87171; }

#workArea { flex: 1; display: flex; min-height: 0; }

.tool-btn.active { background: var(--accent); color: #0f172a; }

#canvasWrap { flex: 1; position: relative; min-width: 0; }
#cadCanvas { display: block; width: 100%; height: 100%; cursor: crosshair; }

/* Línea de comandos, estilo AutoCAD: historial + prompt actual.
   Altura fija (3 líneas de historial + 1 actual) para que el canvas no
   cambie de tamaño según cuánto texto haya acumulado. */
#commandLine {
  background: #0b1220; border-top: 1px solid var(--panel-border); flex-shrink: 0;
  padding: 4px 14px; font-family: 'SFMono-Regular', Consolas, Menlo, monospace; font-size: 12px;
  height: 74px; overflow: hidden;
}
#commandHistory { color: var(--text-dim); height: 54px; overflow: hidden; }
#commandHistory div { padding: 1px 0; }
#commandCurrent { color: var(--text); padding: 1px 0; }
.command-label { color: var(--accent); }

#rightPanel {
  width: 260px; background: var(--panel); border-left: 1px solid var(--panel-border);
  display: flex; flex-direction: column; flex-shrink: 0;
}
.panel-tabs { display: flex; border-bottom: 1px solid var(--panel-border); }
.panel-tab {
  flex: 1; background: transparent; border: none; color: var(--text-dim);
  padding: 10px; cursor: pointer; font-size: 13px; border-bottom: 2px solid transparent;
}
.panel-tab.active { color: var(--text); border-bottom-color: var(--accent); }
.panel-content { display: none; flex: 1; flex-direction: column; padding: 10px; overflow-y: auto; }
.panel-content.active { display: flex; }

.layer-row { display: flex; align-items: center; gap: 6px; padding: 6px 2px; border-bottom: 1px solid #27354a; }
.layer-row--active { background: rgba(56, 189, 248, 0.08); border-radius: 4px; }
.layer-row input[type="color"] { width: 22px; height: 22px; border: none; background: none; padding: 0; }
.layer-name { flex: 1; min-width: 0; background: #0f172a; border: 1px solid #334155; color: var(--text); border-radius: 4px; padding: 3px 5px; font-size: 12px; }
.icon-btn { background: transparent; border: none; color: var(--text-dim); cursor: pointer; font-size: 13px; padding: 2px 4px; }
.icon-btn:hover { color: var(--text); }

.block-row { display: flex; align-items: center; justify-content: space-between; padding: 6px 2px; border-bottom: 1px solid #27354a; font-size: 13px; }
.small-btn { background: #334155; border: 1px solid #475569; color: var(--text); border-radius: 6px; padding: 5px 10px; font-size: 12px; cursor: pointer; }
.small-btn:hover { background: #475569; }
.full-width { width: 100%; margin-top: 8px; }
.empty-hint { color: var(--text-dim); font-size: 12px; line-height: 1.4; }

#statusBar {
  display: flex; align-items: center; gap: 24px; background: var(--panel);
  border-top: 1px solid var(--panel-border); padding: 6px 14px; font-size: 12px; color: var(--text-dim);
  flex-shrink: 0;
}
.status-toggles { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.status-icon-btn {
  background: transparent; border: 1px solid transparent; border-radius: 4px; color: var(--text-dim);
  font-size: 14px; width: 24px; height: 24px; cursor: pointer; line-height: 1;
}
.status-icon-btn:hover { border-color: var(--panel-border); color: var(--text); }
.status-icon-btn.active { background: var(--accent); color: #0f172a; }

/* Cuenta de usuario (barra superior) */
#accountArea { margin-left: auto; display: flex; align-items: center; gap: 8px; font-size: 13px; }
.account-email { color: var(--text-dim); }

/* Modales (login/registro, mis dibujos) */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(15, 23, 42, 0.65);
  display: flex; align-items: center; justify-content: center; z-index: 100;
}
.modal-overlay[hidden] { display: none; }
.modal-box {
  background: var(--panel); border: 1px solid var(--panel-border); border-radius: 10px;
  padding: 20px; width: 320px; max-width: calc(100vw - 32px);
}
.modal-box--wide { width: 420px; }
.modal-box h2 { margin: 0 0 14px; font-size: 16px; }
.modal-box .field { display: flex; flex-direction: column; gap: 4px; margin-bottom: 12px; }
.modal-box label { font-size: 12px; color: var(--text-dim); }
.modal-box input[type="email"], .modal-box input[type="password"], .modal-box input[type="text"] {
  background: #0f172a; border: 1px solid #334155; color: var(--text); border-radius: 6px;
  padding: 7px 9px; font-size: 13px;
}
.modal-actions { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-top: 16px; }
.modal-error { color: #f87171; font-size: 12px; margin-top: 8px; min-height: 14px; }
.modal-links { display: flex; justify-content: space-between; margin-top: 10px; font-size: 12px; }
.modal-links a { color: var(--accent); cursor: pointer; text-decoration: none; }
.modal-links a:hover { text-decoration: underline; }
.modal-close { position: absolute; top: 12px; right: 14px; background: none; border: none; color: var(--text-dim); font-size: 16px; cursor: pointer; }
.modal-box { position: relative; }

.drawing-row {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  padding: 8px 4px; border-bottom: 1px solid #27354a; font-size: 13px;
}
.drawing-row .drawing-name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; cursor: pointer; }
.drawing-row .drawing-name:hover { color: var(--accent); }
.drawing-row .drawing-date { color: var(--text-dim); font-size: 11px; }
#drawingsList { max-height: 320px; overflow-y: auto; margin-bottom: 4px; }

/* Responsive (iPhone y pantallas estrechas): la cinta pasa a una sola fila
   compacta de solo iconos con scroll horizontal, en vez de grupos apilados
   con icono+texto — eso es lo que ocupaba tanto espacio vertical. */
@media (max-width: 700px) {
  #topBar { padding: 6px 8px; gap: 6px; }
  .brand { font-size: 13px; margin-right: 2px; }
  .top-actions { overflow-x: auto; flex-wrap: nowrap; -webkit-overflow-scrolling: touch; }
  .top-btn { padding: 5px 7px; font-size: 11px; white-space: nowrap; flex-shrink: 0; }
  #accountArea { font-size: 11px; gap: 4px; }
  .account-email { display: none; }

  .ribbon-tabs { padding: 2px 6px 0; }
  .ribbon-tab { padding: 4px 8px; font-size: 11px; }
  .ribbon-panel { padding: 3px 6px; flex-wrap: nowrap; }
  .ribbon-group { flex-direction: row; align-items: center; padding: 0 5px; gap: 2px; }
  .ribbon-group-title { display: none; }
  .ribbon-group-buttons, .ribbon-group-buttons--grid {
    display: flex; flex-wrap: nowrap; grid-template-columns: none; gap: 1px;
  }
  .ribbon-btn { flex-direction: row; width: auto; padding: 6px; gap: 0; flex-shrink: 0; }
  .ribbon-btn span:last-child { display: none; }
  .ribbon-icon { font-size: 16px; }

  #docTabs { padding: 2px 6px 0; }
  .doc-tab { padding: 4px 6px 4px 8px; font-size: 11px; max-width: 110px; }

  #rightPanel { width: 150px; }
  .panel-tab { padding: 6px 4px; font-size: 11px; }

  #commandLine { height: 54px; padding: 3px 8px; font-size: 10px; }
  #commandHistory { height: 36px; }

  #statusBar { padding: 4px 8px; font-size: 10px; gap: 10px; }
}