:root {
  --clr-header: #1e2a3a;
  --clr-toolbar: #263248;
  --clr-toolbar-hover: #2e3d5c;
  --clr-accent: #3b82f6;
  --clr-accent-dark: #1d4ed8;
  --clr-accent-green: #10b981;
  --clr-panel-bg: #f8fafc;
  --clr-panel-border: #e2e8f0;
  --clr-canvas-bg: #ffffff;
  --clr-text: #1e293b;
  --clr-text-muted: #64748b;
  --clr-wall: #2d3748;
  --clr-door: #92400e;
  --clr-window: #1e40af;
  --clr-room: rgba(59,130,246,0.08);
  --clr-dim: #dc2626;
  --clr-select: #f59e0b;
  --toolbar-w: 148px;
  --panel-w: 272px;
  --header-h: 46px;
  --radius: 6px;
  --shadow: 0 1px 3px rgba(0,0,0,.12), 0 1px 2px rgba(0,0,0,.06);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 13px;
  color: var(--clr-text);
  background: var(--clr-canvas-bg);
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  user-select: none;
}

/* ── HEADER ─────────────────────────────────────── */
#header {
  height: var(--header-h);
  background: var(--clr-header);
  color: #fff;
  display: flex;
  align-items: center;
  padding: 0 12px;
  gap: 12px;
  flex-shrink: 0;
  z-index: 100;
  box-shadow: 0 2px 6px rgba(0,0,0,.3);
}

.header-left  { display: flex; align-items: center; gap: 12px; flex: 1; min-width: 0; }
.header-center { flex: 0 1 auto; font-size: 11px; color: #94a3b8; white-space: nowrap; }
.header-right { display: flex; align-items: center; gap: 6px; }

.app-logo {
  display: flex;
  align-items: center;
  gap: 7px;
  color: var(--clr-accent);
  flex-shrink: 0;
}
.app-logo svg { width: 20px; height: 20px; }
.logo-text { font-weight: 700; font-size: 14px; letter-spacing: -.3px; color: #fff; }

.project-name-wrap { min-width: 0; }
#project-name {
  background: transparent;
  border: none;
  border-bottom: 1px solid rgba(255,255,255,.2);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  padding: 2px 4px;
  width: 180px;
  outline: none;
}
#project-name:focus { border-bottom-color: var(--clr-accent); }

.btn-header {
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.15);
  color: #e2e8f0;
  padding: 5px 12px;
  border-radius: 5px;
  cursor: pointer;
  font-size: 12px;
  white-space: nowrap;
  transition: background .15s;
}
.btn-header:hover { background: rgba(255,255,255,.2); }
.btn-save { background: var(--clr-accent) !important; border-color: var(--clr-accent) !important; color: #fff !important; }
.btn-save:hover { background: var(--clr-accent-dark) !important; }
.btn-export { background: var(--clr-accent-green) !important; border-color: var(--clr-accent-green) !important; color: #fff !important; }
.btn-export:hover { background: #059669 !important; }
.btn-undo:disabled { opacity: 0.35; cursor: not-allowed; }

/* ── MAIN LAYOUT ─────────────────────────────────── */
#main {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* ── MODAL ───────────────────────────────────────── */
#modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.45);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
}
#modal-overlay.hidden { display: none; }

.modal-box {
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 20px 60px rgba(0,0,0,.3);
  width: 420px;
  max-width: 90vw;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid #e2e8f0;
}
.modal-header h3 { font-size: 15px; font-weight: 600; }
.modal-close {
  background: none; border: none; cursor: pointer;
  color: #64748b; font-size: 16px; padding: 2px 6px; border-radius: 4px;
}
.modal-close:hover { background: #f1f5f9; }
.modal-body { padding: 16px 18px; overflow-y: auto; flex: 1; }
.modal-footer {
  padding: 12px 18px;
  border-top: 1px solid #e2e8f0;
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}
.btn-modal-cancel {
  background: #f1f5f9; border: 1px solid #e2e8f0; color: #475569;
  padding: 6px 16px; border-radius: 5px; cursor: pointer; font-size: 13px;
}
.btn-modal-cancel:hover { background: #e2e8f0; }
.btn-modal-ok {
  background: var(--clr-accent); border: none; color: #fff;
  padding: 6px 16px; border-radius: 5px; cursor: pointer; font-size: 13px; font-weight: 600;
}
.btn-modal-ok:hover { background: var(--clr-accent-dark); }

/* ── CONTEXT MENU ────────────────────────────────── */
#context-menu {
  position: fixed;
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 7px;
  box-shadow: 0 8px 24px rgba(0,0,0,.15);
  z-index: 500;
  min-width: 160px;
  padding: 4px 0;
}
#context-menu.hidden { display: none; }
#context-menu-list { list-style: none; }
#context-menu-list li {
  padding: 7px 14px;
  cursor: pointer;
  font-size: 13px;
  color: #1e293b;
}
#context-menu-list li:hover { background: #f1f5f9; }
#context-menu-list li.danger { color: #dc2626; }
#context-menu-list li.danger:hover { background: #fef2f2; }
#context-menu-list .ctx-sep {
  height: 1px; background: #e2e8f0; margin: 4px 0; cursor: default;
}
#context-menu-list .ctx-sep:hover { background: #e2e8f0; }

/* ── 3D VIEWER ───────────────────────────────────── */
#view3d-overlay {
  position: fixed;
  inset: 0;
  z-index: 800;
  display: flex;
  flex-direction: column;
  background: #0c1820;
}
#view3d-overlay.hidden { display: none; }

#view3d-toolbar {
  height: 46px;
  background: var(--clr-header);
  display: flex;
  align-items: center;
  padding: 0 14px;
  gap: 14px;
  flex-shrink: 0;
  box-shadow: 0 2px 6px rgba(0,0,0,.4);
}
#view3d-toolbar > span:first-child {
  color: #e2e8f0;
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
}
#view3d-floor-sel {
  background: rgba(255,255,255,.10);
  border: 1px solid rgba(255,255,255,.20);
  color: #e2e8f0;
  padding: 4px 8px;
  border-radius: 5px;
  font-size: 12px;
  cursor: pointer;
  outline: none;
}
#view3d-floor-sel option { background: #1e2a3a; color: #e2e8f0; }

.view3d-hint-text {
  flex: 1;
  text-align: center;
  font-size: 11px;
  color: #64748b;
}

#btn-3d-close, #btn-3d-walk {
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.2);
  color: #e2e8f0;
  padding: 5px 16px;
  border-radius: 5px;
  cursor: pointer;
  font-size: 12px;
  white-space: nowrap;
  transition: background .15s;
}
#btn-3d-close:hover { background: rgba(255,255,255,.22); }
#btn-3d-walk:hover  { background: rgba(255,255,255,.22); }
#btn-3d-walk.walk-active { background: #10b981 !important; border-color: #059669 !important; color: #fff !important; }

/* Crosshair in walk mode */
#view3d-canvas.walk-mode::after {
  content: '+';
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  color: rgba(255,255,255,.8);
  font-size: 22px;
  font-weight: 300;
  pointer-events: none;
  z-index: 10;
  text-shadow: 0 0 4px rgba(0,0,0,.5);
}
#view3d-canvas.walk-mode { cursor: none; }
#walk-hint {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,.65);
  color: #fff;
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 12px;
  pointer-events: none;
  z-index: 20;
  display: none;
}
#view3d-canvas.walk-mode #walk-hint { display: block; }

#view3d-canvas {
  flex: 1;
  position: relative;
  overflow: hidden;
}
#view3d-canvas canvas {
  display: block !important;
  width: 100% !important;
  height: 100% !important;
}

#view3d-hint {
  position: absolute;
  bottom: 18px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,.55);
  color: #94a3b8;
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 11px;
  pointer-events: none;
  white-space: nowrap;
}

.btn-3d {
  background: #7c3aed !important;
  border-color: #7c3aed !important;
  color: #fff !important;
}
.btn-3d:hover { background: #6d28d9 !important; }
.btn-present {
  background: #0f766e !important;
  border-color: #0f766e !important;
  color: #fff !important;
}
.btn-present:hover { background: #0d6b62 !important; }

/* ── TOOLBAR TOGGLE ──────────────────────────────── */
#toolbar {
  transition: width 0.2s ease, padding 0.2s ease, min-width 0.2s ease;
}
#toolbar.toolbar-hidden {
  width: 0 !important;
  padding: 0 !important;
  overflow: hidden !important;
  min-width: 0 !important;
}
.btn-toolbar-toggle {
  padding: 5px 9px !important;
  font-size: 15px !important;
  flex-shrink: 0 !important;
  font-weight: 600 !important;
}

/* ── UTILITIES ───────────────────────────────────── */
.hidden { display: none !important; }
.empty-msg { color: var(--clr-text-muted); font-size: 12px; font-style: italic; padding: 4px 0; }

/* ── RESPONSIVE ─────────────────────────────────── */

/* Tablets and below: panel slides in as overlay */
@media (max-width: 900px) {
  :root {
    --panel-w: 260px;
  }

  #panel {
    position: fixed;
    right: 0;
    top: var(--header-h);
    bottom: 0;
    z-index: 200;
    transform: translateX(100%);
    transition: transform .25s ease;
    box-shadow: -4px 0 16px rgba(0,0,0,.18);
  }
  #panel.panel-open {
    transform: translateX(0);
  }

  .btn-panel-toggle { display: flex !important; }

  .header-center { display: none; }

  #project-name { width: 130px; }
}

/* Already visible on desktop */
@media (min-width: 901px) {
  .btn-panel-toggle { display: none !important; }
}

/* Phones: compact toolbar */
@media (max-width: 600px) {
  :root {
    --toolbar-w: 108px;
    --header-h: 42px;
  }

  .logo-text { display: none; }

  .btn-header { padding: 4px 8px; font-size: 11px; }

  .header-right { gap: 4px; }

  /* Hide less-critical header buttons on very small screens */
  #btn-export-csv,
  #btn-export-json,
  #btn-import-json { display: none; }
}

/* ── Brújula de orientación ──────────────────────── */
#compass-overlay {
  position: absolute;
  bottom: 70px;
  right: 16px;
  background: rgba(255,255,255,0.92);
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  padding: 6px 8px 4px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.13);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  z-index: 40;
  user-select: none;
  min-width: 82px;
}
#compass-title {
  font-size: 11px;
  font-weight: 700;
  color: #1e2a3a;
  letter-spacing: 0.04em;
}
#compass-deg {
  font-weight: 400;
  color: #64748b;
  font-size: 10px;
}
#compass-svg { display: block; }
#compass-btns {
  display: flex;
  gap: 6px;
  margin-top: 2px;
}
#compass-btns button {
  background: #f1f5f9;
  border: 1px solid #e2e8f0;
  border-radius: 4px;
  width: 24px;
  height: 22px;
  font-size: 11px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #475569;
  transition: background 0.15s;
}
#compass-btns button:hover { background: #e0e7ef; }

/* ── Indicador RETILAP ───────────────────────────── */
.retilap-indicator {
  margin-top: 8px;
  padding: 7px 8px 6px;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  font-size: 11px;
}
.retilap-title {
  font-weight: 700;
  color: #1e2a3a;
  margin-bottom: 5px;
  font-size: 11px;
  letter-spacing: 0.03em;
}
.retilap-bar-wrap {
  background: #e2e8f0;
  border-radius: 4px;
  height: 6px;
  overflow: hidden;
  margin-bottom: 4px;
}
.retilap-bar {
  height: 100%;
  border-radius: 4px;
  transition: width 0.3s, background 0.3s;
  min-width: 4px;
}
.retilap-val {
  font-size: 10.5px;
  font-weight: 600;
}
.retilap-val.ok   { color: #15803d; }
.retilap-val.warn { color: #b45309; }

/* ── Handle de rotación de muebles ──────────────── */
.furn-rot-handle { cursor: grab; }
.furn-rot-handle:hover { filter: brightness(1.25); }

/* ── PRESENTATION MODE ───────────────────────────── */
body.presentation-mode #header,
body.presentation-mode #toolbar,
body.presentation-mode #panel,
body.presentation-mode #compass-overlay,
body.presentation-mode #status-bar { display: none !important; }

body.presentation-mode #main { flex: 1; }

#pres-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 900;
  display: none;
  flex-direction: column;
  align-items: flex-end;
  padding: 16px;
  gap: 8px;
}
#pres-exit {
  pointer-events: all;
  background: rgba(30,42,58,.9);
  color: #fff;
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 13px;
  cursor: pointer;
  user-select: none;
  transition: background .15s;
}
#pres-exit:hover { background: #ef4444; }
#pres-info {
  background: rgba(30,42,58,.85);
  color: #e2e8f0;
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 12px;
  display: flex;
  gap: 14px;
  align-items: center;
}
#pres-north { color: #3b82f6; font-weight: 700; font-size: 14px; }