.stage-shell {
  position: relative;
  min-height: 100vh;
  padding: 20px;
}

.app-overlay {
  position: fixed;
  inset: 0;
  z-index: 20;
  overflow: auto;
  padding: 20px;
  background:
    linear-gradient(180deg, rgba(9, 10, 15, 0.76), rgba(9, 10, 15, 0.94)),
    radial-gradient(ellipse at center, rgba(72, 214, 210, 0.16), transparent 50%);
  backdrop-filter: blur(4px);
}

#gameScreen {
  overflow: hidden;
}

body[data-screen="onlineGame"] {
  height: 100dvh;
  overflow: hidden;
}

body[data-screen="onlineGame"] .stage-shell {
  height: 100dvh;
  min-height: 0;
}

.boot-screen {
  display: grid;
  place-items: center;
}

.intro-screen {
  display: grid;
  place-items: center;
  z-index: 30;
}

.intro-panel {
  text-align: center;
}

.intro-host-image {
  width: min(220px, 60vw);
  margin: 0 auto 14px;
  display: block;
  filter: drop-shadow(0 18px 36px rgba(72, 214, 210, 0.22));
}

.intro-actions {
  display: grid;
  gap: 10px;
}

.mobile-only,
.mobile-intel-close {
  display: none;
}

.auth-panel,
.end-panel {
  margin: min(12vh, 100px) auto;
}

.overlay-panel {
  width: min(480px, 100%);
  padding: 24px;
}

.overlay-panel h2 {
  margin: 0;
  font-size: 34px;
  line-height: 1.05;
  letter-spacing: 0;
}

.overlay-panel p:not(.eyebrow) {
  margin: 12px 0 18px;
  line-height: 1.45;
}

.intro-question {
  color: var(--gf-warm);
  font-weight: 800;
}

.start-button {
  width: 100%;
  min-height: 52px;
}