/* Editor shell layout, topbar, rails, and responsive chrome. */
.app-loading {
  position: fixed;
  inset: 0;
  z-index: var(--z-loading);
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(8, 15, 31, 0.72);
  backdrop-filter: blur(6px);
}

.app-loading-card {
  padding: var(--space-8) var(--space-9);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  align-items: flex-start;
  max-width: 360px;
}

.app-loading-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--tracking-base);
}

.app {
  --rail-w: 64px;
  --panel-open-w: 340px;
  --panel-collapsed-w: 52px;
  --left-w: var(--panel-open-w);
  --right-w: var(--panel-open-w);
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  gap: var(--space-6);
  padding: var(--space-7);
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
}

.app.right-collapsed {
  --right-w: var(--panel-collapsed-w);
}

@media (min-width: 901px) {
  .app.mode-use,
  .app.mode-design.template-editing {
    grid-template-columns: var(--rail-w) var(--left-w) 1fr;
  }

  .app.mode-use.left-collapsed,
  .app.mode-design.template-editing.left-collapsed {
    grid-template-columns: var(--rail-w) 1fr;
  }

  .app.mode-design {
    grid-template-columns: var(--rail-w) var(--left-w) 1fr var(--right-w);
  }

  .app.mode-design.left-collapsed {
    grid-template-columns: var(--rail-w) 1fr var(--right-w);
  }

  .app.mode-design.layout-focus {
    grid-template-columns: var(--rail-w) 1fr;
  }
}

.topbar {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  gap: var(--space-4);
  flex-wrap: nowrap;
  overflow: hidden;
  box-shadow: var(--shadow-elevated);
}

.topbar-left,
.topbar-right {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: nowrap;
}

.topbar-zoom {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: nowrap;
}

.topbar-left {
  min-width: 0;
}

.topbar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-width: 0;
}

.topbar-brand .title {
  font-size: var(--font-size-xl);
  white-space: nowrap;
}

.topbar-actions {
  display: flex;
  gap: var(--space-2);
  flex-wrap: nowrap;
}

.topbar-center {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  min-width: 0;
  overflow: hidden;
}

.topbar-status-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
}

.topbar-status-pill-secondary {
  color: var(--text);
}

.topbar-status-key {
  color: var(--muted);
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
}

.topbar-status-value {
  font-weight: 600;
}

.topbar-selection {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 260px;
}

.topbar .chip {
  padding: var(--space-3) var(--space-5);
}

.topbar .chip.icon-btn {
  padding: var(--space-3);
  min-width: var(--control-h-md);
  border-radius: var(--radius-md);
}

.topbar .pill {
  padding: var(--space-1) var(--space-4);
}


.layout-focus .sidebar {
  display: none;
}

@media (max-width: 1100px) {
  .topbar-selection {
    display: none;
  }
}

.tool-rail {
  padding: var(--space-5) var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  align-items: stretch;
  min-height: 0;
  overflow: hidden;
}

.tool-rail-top {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  flex: 0 0 auto;
}

.tool-rail-main {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
}

.tool-rail-divider {
  height: 1px;
  background: var(--border);
  opacity: 0.6;
  margin: var(--space-1) 0;
  flex: 0 0 auto;
}

.tool-rail-panels {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  flex: 0 0 auto;
}

.rail-button {
  justify-content: center;
  min-height: var(--control-h-xl);
  border-radius: var(--radius-control-lg);
  width: 100%;
}

.tool-rail .rail-button:not(.ghost) {
  border-color: rgba(34, 211, 238, 0.55);
  background: rgba(34, 211, 238, 0.12);
  color: #9ae5f8;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.title {
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-3xl);
}

.muted {
  color: var(--muted);
  font-size: var(--font-size-lg);
}

.top-actions,
.top-status {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  align-items: center;
}

.sidebar {
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  min-height: 0;
  overflow-y: auto;
}

.sidebar.sidebar-collapsed {
  padding: var(--space-5) var(--space-3);
  overflow: hidden;
  align-items: center;
  justify-content: flex-start;
  gap: var(--space-5);
}

.panel-collapsed {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-5);
  margin-top: var(--space-1);
}

.panel-collapsed-label {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  font-size: var(--font-size-sm);
  color: var(--muted);
  user-select: none;
}

.inspector.sidebar {
  overflow: hidden;
}

.inspector-body {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  background: linear-gradient(145deg, var(--panel), var(--panel-alt));
  padding-bottom: var(--space-1);
}

/* Dense sidebar controls (scope to panels only). */
.sidebar .chip {
  padding: var(--space-3) var(--space-5);
  min-height: var(--control-h-sm);
}

.sidebar input[type="range"] {
  height: 18px;
}

.sidebar input[type="range"]::-webkit-slider-runnable-track {
  height: 6px;
}

.sidebar input[type="range"]::-webkit-slider-thumb {
  width: 14px;
  height: 14px;
  margin-top: -4px;
}

.sidebar input[type="range"]::-moz-range-track {
  height: 6px;
}

.sidebar input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
}

.canvas {
  padding: var(--space-7);
  display: flex;
  flex-direction: column;
  gap: var(--space-7);
  min-height: 0;
  overflow: hidden;
}

@media (max-width: 900px) {
  .app {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto minmax(0, 1fr) minmax(0, 360px);
  }
  .app.layout-focus {
    grid-template-rows: auto auto minmax(0, 1fr);
  }
  .topbar {
    grid-column: 1;
  }
  .tool-rail {
    grid-column: 1;
    flex-direction: row;
    justify-content: center;
    flex-wrap: wrap;
    overflow: visible;
  }
  .tool-rail-top,
  .tool-rail-main,
  .tool-rail-panels {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    overflow: visible;
    min-height: auto;
    flex: 0 0 auto;
  }
  .tool-rail-divider {
    display: none;
  }
  .rail-button {
    width: auto;
    flex: 0 0 56px;
  }
  .sidebar {
    grid-column: 1;
    order: 3;
  }
  .canvas {
    grid-column: 1;
    order: 1;
  }
}