body.home-page,
body.app-page,
body.result-page {
  min-height: 100vh;
  min-height: 100dvh;
}

.ambient-grid,
.arena-glow {
  inset: 0;
  pointer-events: none;
  position: fixed;
  z-index: -1;
}

.ambient-grid {
  background:
    radial-gradient(ellipse at 20% 0%, rgba(168, 85, 247, 0.08), transparent 50%),
    radial-gradient(ellipse at 80% 100%, rgba(6, 182, 212, 0.06), transparent 50%);
}

.arena-glow {
  background:
    radial-gradient(ellipse at 50% 30%, rgba(168, 85, 247, 0.06), transparent 60%);
}

.home-shell,
.app-shell,
.result-shell {
  margin: 0 auto;
  max-width: 960px;
  min-height: 100vh;
  min-height: 100dvh;
  padding: 1rem;
}

.hero-header,
.app-header {
  align-items: center;
  display: flex;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.hero-stage {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.hero-copy {
  padding: 1.5rem;
}

.hero-visual {
  display: none;
}

.hero-monitor,
.hero-panel,
.signal-pane,
.lobby-panel {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 1rem;
}

.app-shell {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.lobby-grid {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  overflow: hidden;
}

.hero-copy,
.workspace-pane,
.info-pane,
.result-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}

.workspace-pane {
  display: grid;
  gap: 1rem;
  padding: 1.25rem;
}

.info-pane {
  display: grid;
  gap: 0.75rem;
  padding: 1.25rem;
}

.viewport-page {
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
}

.result-shell {
  align-items: center;
  display: flex;
  justify-content: center;
}

.result-panel {
  max-width: 480px;
  padding: 2rem 1.5rem;
  text-align: center;
  width: 100%;
}

@media (min-width: 768px) {
  .home-shell,
  .app-shell,
  .result-shell {
    padding: 1.5rem;
  }

  .hero-copy {
    padding: 2rem;
  }

  .lobby-grid {
    flex-direction: row;
  }

  .lobby-grid .workspace-pane {
    flex: 1;
  }

  .lobby-grid .info-pane {
    width: 280px;
    flex-shrink: 0;
  }
}