/* ============================================
   MAPA MENTAL MAKER - Layout
   ============================================ */

/* --- App Container --- */
.app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  width: 100vw;
  overflow: hidden;
}

/* --- Header --- */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  padding: 0 var(--space-lg);
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  z-index: var(--z-header);
  flex-shrink: 0;
}

.header__left {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.header__logo {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--text-primary);
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.header__separator {
  width: 1px;
  height: 24px;
  background-color: var(--border-color);
}

.header__title {
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  color: var(--text-secondary);
  max-width: 240px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
  cursor: text;
}

.header__title:hover {
  border-color: var(--border-color);
  background-color: var(--bg-primary);
}

.header__title:focus {
  outline: none;
  border-color: var(--accent-blue);
  background-color: var(--bg-secondary);
  color: var(--text-primary);
}

.header__center {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.header__right {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  position: relative;
}

.header__save-status {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--text-xs);
  color: var(--text-muted);
  transition: opacity var(--transition-base);
}

.header__save-status .dot {
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background-color: var(--accent-green);
  transition: background-color var(--transition-base);
}

.header__save-status.saving .dot {
  background-color: var(--accent-orange);
}

.header__actions-desktop {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.header__more-btn {
  display: none;
}

.header__more-menu {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: var(--space-sm);
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-elevated);
  min-width: 180px;
  padding: var(--space-xs);
  z-index: 1000;
  display: none;
}

.header__more-menu.visible {
  display: flex;
  flex-direction: column;
}

/* --- Main Content --- */
.main {
  display: flex;
  flex: 1;
  overflow: hidden;
  position: relative;
}

/* --- Sidebar --- */
.sidebar {
  width: var(--sidebar-width);
  height: 100%;
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  z-index: var(--z-sidebar);
  flex-shrink: 0;
  overflow: hidden;
  transition: width var(--transition-smooth), opacity var(--transition-smooth);
}

.sidebar.collapsed {
  width: 0;
  opacity: 0;
  pointer-events: none;
}

/* Tabs: see components.css for premium icon-only tabs */

.sidebar__content {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-md);
}

.sidebar__panel {
  display: none;
}

.sidebar__panel.active {
  display: block;
}

/* --- Sidebar Panel Sections --- */
.panel-section {
  margin-bottom: var(--space-lg);
}

.panel-section__title {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-sm);
}

/* --- Canvas Area --- */
.canvas-container {
  flex: 1;
  position: relative;
  overflow: hidden;
  background-color: var(--bg-canvas);
  cursor: grab;
  touch-action: none;
}

.canvas-container.panning {
  cursor: grabbing;
}

.canvas-container.creating {
  cursor: crosshair;
}

/* --- Canvas Grid (Premium) --- */
.canvas-grid {
  position: absolute;
  inset: -50%;
  width: 200%;
  height: 200%;
  pointer-events: none;
  z-index: 0;
  background-image:
    radial-gradient(circle, var(--grid-dot-color, rgba(0,0,0,0.08)) 1px, transparent 1px);
  background-size: 28px 28px;
  opacity: 1;
  transition: opacity var(--transition-base), background-image var(--transition-base);
  animation: gridFloat 30s ease-in-out infinite alternate;
}

.canvas-grid.lines {
  background-image:
    linear-gradient(to right, var(--grid-dot-color, rgba(0,0,0,0.08)) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-dot-color, rgba(0,0,0,0.08)) 1px, transparent 1px);
  background-size: 40px 40px;
  animation: none; /* Linhas organizadas ficam fixas para melhor visualizacao */
}

.canvas-grid::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(
    ellipse at center,
    transparent 50%,
    var(--bg-canvas) 100%
  );
  z-index: 1;
}

@keyframes gridFloat {
  0% { transform: translate(0, 0); }
  100% { transform: translate(14px, 14px); }
}

.canvas-grid.hidden {
  opacity: 0;
}

/* --- Canvas Viewport (transformavel) --- */
.canvas-viewport {
  position: absolute;
  inset: 0;
  transform-origin: 0 0;
  will-change: transform;
}

/* --- SVG Layer (conexoes) --- */
.connections-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: var(--z-connections);
  overflow: visible;
}

.connections-layer path {
  fill: none;
  stroke: var(--border-hover);
  stroke-width: 2;
  stroke-linecap: round;
  transition: stroke var(--transition-fast);
}

.connections-layer path:hover {
  stroke: var(--accent-blue);
  stroke-width: 2.5;
}

.connections-layer path.creating {
  stroke: var(--accent-blue);
  stroke-dasharray: 8 4;
  opacity: 0.6;
}

/* --- Nodes Layer --- */
.nodes-layer {
  position: absolute;
  inset: 0;
  z-index: var(--z-nodes);
}

/* --- Rubber Band Selection --- */
.selection-box {
  position: absolute;
  border: 1.5px solid var(--accent-blue);
  background-color: rgba(79, 140, 255, 0.08);
  border-radius: var(--radius-xs);
  pointer-events: none;
  z-index: var(--z-node-dragging);
  display: none;
}

/* --- Zoom Controls --- */
.zoom-controls {
  position: absolute;
  bottom: var(--space-lg);
  right: var(--space-lg);
  display: flex;
  flex-direction: column;
  background-color: var(--bg-secondary);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-color);
  z-index: var(--z-zoom-controls);
  overflow: hidden;
}

.zoom-controls__btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--zoom-control-width);
  height: var(--zoom-control-width);
  color: var(--text-secondary);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.zoom-controls__btn:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
}

.zoom-controls__btn:active {
  background-color: var(--bg-active);
}

.zoom-controls__level {
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--zoom-control-width);
  height: 32px;
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  color: var(--text-secondary);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.zoom-controls__level:hover {
  background-color: var(--bg-hover);
}

.zoom-controls__separator {
  height: 1px;
  background: var(--border-color);
  margin: 2px 6px;
}

/* --- Minimap --- */
.minimap {
  position: absolute;
  bottom: var(--space-lg);
  left: var(--space-lg);
  width: var(--minimap-size);
  height: calc(var(--minimap-size) * 0.7);
  background-color: var(--bg-secondary);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-color);
  z-index: var(--z-minimap);
  overflow: hidden;
  cursor: pointer;
}

.minimap canvas {
  width: 100%;
  height: 100%;
}

.minimap__viewport {
  position: absolute;
  border: 2px solid var(--accent-blue);
  background-color: rgba(79, 140, 255, 0.08);
  border-radius: 2px;
  pointer-events: none;
}

/* --- Context Menu --- */
.context-menu {
  position: fixed;
  min-width: 200px;
  background-color: var(--bg-secondary);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-elevated);
  border: 1px solid var(--border-color);
  z-index: var(--z-context-menu);
  padding: var(--space-xs);
  display: none;
}

.context-menu.visible {
  display: block;
}

.context-menu__item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  font-size: var(--text-sm);
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast);
  cursor: pointer;
}

.context-menu__item:hover {
  background-color: var(--bg-hover);
}

.context-menu__item.danger {
  color: var(--accent-red);
}

.context-menu__item.danger:hover {
  background-color: var(--accent-red-light);
}

.context-menu__item i {
  width: 16px;
  height: 16px;
  color: var(--text-muted);
  flex-shrink: 0;
}

.context-menu__item.danger i {
  color: var(--accent-red);
}

.context-menu__shortcut {
  margin-left: auto;
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.context-menu__separator {
  height: 1px;
  background-color: var(--border-color);
  margin: var(--space-xs) 0;
}

/* --- Toast Notifications --- */
.toast-container {
  position: fixed;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background-color: var(--text-primary);
  color: var(--text-inverse);
  font-size: var(--text-sm);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-elevated);
  pointer-events: auto;
  opacity: 0;
  transform: translateY(16px);
}

.toast i {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* --- Modal --- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: var(--bg-overlay);
  z-index: var(--z-modal-overlay);
  display: none;
  align-items: center;
  justify-content: center;
  opacity: 0;
}

.modal-overlay.visible {
  display: flex;
}

.modal {
  background-color: var(--bg-secondary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-elevated);
  max-width: 520px;
  width: 90%;
  max-height: 80vh;
  overflow: auto;
  padding: var(--space-xl);
}

.modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
}

.modal__title {
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
}

.modal__close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.modal__close:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
}

.modal__body {
  margin-bottom: var(--space-lg);
}

.modal__footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-sm);
}

/* --- Welcome / Home Screen --- */
.home-screen {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  background-color: var(--bg-primary);
  z-index: var(--z-context-menu); /* Deve cobrir o editor, mas ficar ABAIXO do modal! */
  overflow-y: auto;
  overflow-x: hidden;
  padding: var(--space-2xl) 0;
}

.home-screen.hidden {
  display: none;
}

.home-bg-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.home-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 560px;
  width: 100%;
  padding: var(--space-2xl);
  margin-top: var(--space-lg);
}

.home-hero {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-sm);
}

.home-hero__banner {
  position: absolute;
  top: -80px;
  left: 50%;
  transform: translateX(-50%);
  width: 150%;
  max-width: 900px;
  height: auto;
  z-index: -1;
  opacity: 0.2;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  pointer-events: none;
  border-radius: var(--radius-2xl);
}

[data-theme="dark"] .home-hero__banner {
  opacity: 0.4;
}

.home-hero__logo {
  width: 56px;
  height: 56px;
  margin-bottom: var(--space-md);
  object-fit: contain;
  filter: drop-shadow(0 8px 16px rgba(79, 140, 255, 0.3));
}

.home-content__title {
  font-family: var(--font-display);
  font-size: 2.75rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
  background: linear-gradient(135deg, var(--text-primary) 30%, var(--accent-blue) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.home-content__subtitle {
  font-size: var(--text-base);
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
}

.home-content__actions {
  display: flex;
  flex-direction: row;
  justify-content: center;
  gap: var(--space-md);
  margin-bottom: var(--space-2xl);
}

.home-maps-list {
  width: 100%;
  margin-top: var(--space-lg);
}

.home-maps-list__title {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-sm);
  text-align: left;
}

.home-map-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-sm);
  cursor: pointer;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.home-map-item:hover {
  border-color: var(--accent-blue);
  box-shadow: var(--shadow-glow-blue);
}

.home-map-item__info {
  text-align: left;
}

.home-map-item__name {
  font-weight: var(--weight-medium);
  font-size: var(--text-base);
}

.home-map-item__date {
  font-size: var(--text-xs);
  color: var(--text-muted);
  margin-top: 2px;
}

.home-map-item__delete {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  transition: background-color var(--transition-fast), color var(--transition-fast);
  opacity: 0;
}

.home-map-item:hover .home-map-item__delete {
  opacity: 1;
}

.home-map-item__delete:hover {
  background-color: var(--accent-red-light);
  color: var(--accent-red);
}

/* --- Responsive: Tablet --- */
@media (max-width: 1023px) {
  .sidebar {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    z-index: var(--z-sidebar);
    box-shadow: var(--shadow-elevated);
  }

  .sidebar.collapsed {
    transform: translateX(-100%);
    width: var(--sidebar-width);
    opacity: 1;
  }
}

/* --- Responsive: Mobile --- */
@media (max-width: 767px) {
  .header {
    padding: 0 var(--space-xs);
    gap: 4px;
  }

  .header__left, .header__right {
    gap: 4px;
  }

  .header__logo {
    display: none;
  }

  .sidebar-toggle__label {
    display: none;
  }

  .sidebar-toggle, .header .btn--icon {
    width: 32px;
    height: 32px;
    padding: 0;
  }

  .sidebar-toggle svg, .header .btn--icon svg {
    width: 16px;
    height: 16px;
  }

  .header__title {
    max-width: 160px;
    font-size: var(--text-sm);
    padding: 2px 4px;
  }

  .header__separator {
    display: none;
  }

  .header__center {
    display: none;
  }

  .header__actions-desktop {
    display: none !important;
  }

  .hide-mobile {
    display: none !important;
  }

  .header__more-btn {
    display: flex;
  }

  .header__right .btn-text {
    display: none;
  }

  .sidebar {
    width: 85vw;
    max-width: 320px;
  }

  .zoom-controls {
    bottom: var(--space-md);
    right: 50%;
    transform: translateX(50%);
    flex-direction: row;
    border-radius: var(--radius-full);
  }

  .zoom-controls__btn {
    width: 36px;
    height: 36px;
  }

  #btn-shortcuts {
    display: none !important;
  }

  .zoom-controls__level {
    width: 48px;
    height: 36px;
    border-top: none;
    border-bottom: none;
    border-left: 1px solid var(--border-color);
    border-right: 1px solid var(--border-color);
  }
  
  .zoom-controls__separator {
    width: 1px;
    height: 24px;
    margin: 6px 2px;
  }

  .minimap {
    display: none;
  }

  .home-content {
    padding: var(--space-lg);
  }

  .home-map-card__actions {
    opacity: 1;
  }
}

/* --- Sidebar Footer (B20 branding) --- */
.sidebar__footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: var(--space-md);
  border-top: 1px solid var(--border-color);
  flex-shrink: 0;
}

.sidebar__footer-text {
  font-size: 11px;
  color: var(--text-muted);
  text-align: center;
}

.sidebar__footer-text strong {
  color: var(--text-secondary);
  font-weight: var(--weight-semibold);
}

.sidebar__footer-email {
  font-size: 11px;
  color: var(--accent-blue);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.sidebar__footer-email:hover {
  color: #3D7AEE;
}

/* --- Home Screen Footer (B20 branding) --- */
.brand-footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  margin-top: var(--space-2xl);
  padding-top: var(--space-lg);
}

.brand-footer__text {
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.brand-footer__text a {
  color: var(--text-secondary);
  font-weight: var(--weight-semibold);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.brand-footer__text a:hover {
  color: var(--accent-blue);
}

.brand-footer__legal {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.brand-footer__legal .btn-link {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0;
  font-size: inherit;
  font-family: inherit;
  transition: color var(--transition-fast);
}

.brand-footer__legal .btn-link:hover {
  color: var(--text-primary);
  text-decoration: underline;
}

.brand-footer__legal .separator {
  opacity: 0.5;
}