/* Reset & layout */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  height: 100vh;
  overflow: hidden;
}

#root {
  height: 100vh;
}

.app {
  display: flex;
  height: 100vh;
  position: relative;
}

.sidebar-toggle {
  display: none;
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 1000;
  background: var(--color-primary);
  color: var(--ctp-crust);
  border: none;
  border-radius: 8px;
  width: 36px;
  height: 36px;
  font-size: 18px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

@media (max-width: 768px) {
  .sidebar-toggle {
    display: flex;
  }

  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    z-index: 999;
    transform: translateX(-100%);
  }

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

  .message-bubble {
    max-width: 90%;
  }
}