body {
  display: grid;
  grid-template-areas:
    "header  header"
    "canvas  sidebar";
  grid-template-rows: var(--header-height) 1fr;
  grid-template-columns: 1fr var(--sidebar-width);
  height: 100dvh;
  overflow: hidden;
}

/* Header */
header {
  grid-area: header;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding: 0 var(--space-lg);
  margin: 8px 8px 0 8px;
  border-radius: var(--radius-lg);
  backdrop-filter: var(--glass-blur);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
  z-index: 10;
}

.header__brand h1 {
  font-family: var(--font-ui);
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

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

.stat {
  display: flex;
  align-items: center;
  gap: 5px;
}

.stat__label {
  font-family: var(--font-ui);
  font-size: 11px;
  color: var(--text-tertiary);
}

.stat__value {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex-shrink: 0;
}

.status-dot--connected { background: var(--sys-green); }
.status-dot--disconnected { background: var(--sys-red); }

.sidebar-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: transparent;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 16px;
  cursor: pointer;
}

.sidebar-toggle:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

/* Canvas */
.canvas-wrap {
  grid-area: canvas;
  overflow: hidden;
  background: var(--bg-primary);
  position: relative;
}

.canvas-wrap canvas {
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  cursor: crosshair;
}

/* Sidebar */
.sidebar {
  grid-area: sidebar;
  display: flex;
  flex-direction: column;
  backdrop-filter: var(--glass-blur);
  background: var(--glass-bg);
  border-left: 1px solid var(--glass-border);
  overflow: hidden;
  z-index: 5;
}

.section-title {
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.glass {
  background: var(--bg-secondary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
}

/* Responsive */
@media (max-width: 1279px) {
  body {
    grid-template-areas: "header" "canvas";
    grid-template-columns: 1fr;
    grid-template-rows: var(--header-height) 1fr;
  }

  .sidebar-toggle { display: flex; }

  .sidebar {
    position: fixed;
    top: var(--header-height);
    right: 0;
    bottom: 0;
    width: var(--sidebar-width);
    transform: translateX(100%);
    transition: transform var(--duration-medium) var(--ease-out);
    z-index: 50;
    backdrop-filter: var(--glass-blur);
    background: var(--glass-bg);
    border-left: 1px solid var(--glass-border);
  }

  .sidebar.is-open { transform: translateX(0); }
}

@media (max-width: 767px) {
  .sidebar {
    top: auto;
    right: 0;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 50dvh;
    transform: translateY(100%);
    border-left: none;
    backdrop-filter: var(--glass-blur);
    background: var(--glass-bg);
    border-top: 1px solid var(--glass-border);
  }

  .sidebar.is-open { transform: translateY(0); }
}