*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: var(--color-pitch-black);
  color: var(--color-ice-highlight);
  font-family: var(--font-untitled-sans);
  font-size: 14px;
  line-height: 1.4;
  touch-action: none;
}

.app-root {
  position: relative;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  background-color: var(--color-pitch-black);
}

.view-screen {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
}

/* Universal Hidden Utility */
.hidden {
  display: none !important;
}

/* Tactile 3D Buttons */
.hud-btn {
  background: var(--glass-3d-btn-bg);
  border: 1px solid var(--liquid-glass-border);
  border-top: 1px solid var(--liquid-glass-border-top);
  color: #ffffff;
  font-family: var(--font-untitled-sans);
  font-size: 14px;
  font-weight: 700;
  min-height: 42px;
  padding: 8px 18px;
  cursor: pointer;
  border-radius: var(--radius-btn);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  letter-spacing: 0.3px;
  box-shadow: var(--glass-3d-btn-shadow);
  transition: all 0.12s ease;
  white-space: nowrap;
}

.hud-btn:hover:not(:disabled) {
  background: var(--glass-3d-btn-bg-hover);
  border-color: var(--theme-accent);
  border-top-color: #ffffff;
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.40), 0 4px 14px rgba(0, 0, 0, 0.8);
}

.hud-btn:hover:not(:disabled) svg {
  filter: drop-shadow(0 0 6px var(--theme-accent));
}

.hud-btn:active:not(:disabled) {
  transform: translateY(1px);
  box-shadow: var(--glass-3d-btn-active-shadow);
}

.hud-btn-primary {
  background: linear-gradient(135deg, rgba(2, 132, 199, 0.8) 0%, rgba(56, 189, 248, 0.4) 100%), #040e22;
  border-color: var(--color-cyan);
  border-top: 1px solid #ffffff;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.45), 0 0 16px var(--theme-primary-glow);
}

.btn-danger {
  color: var(--color-red) !important;
  border-color: rgba(244, 63, 94, 0.35) !important;
}

.btn-danger:hover:not(:disabled) {
  background: rgba(244, 63, 94, 0.16) !important;
  border-color: var(--color-red) !important;
  color: #ffffff !important;
  box-shadow: 0 0 14px rgba(244, 63, 94, 0.4) !important;
}

/* Main Menu Screen */
#screen-menu {
  align-items: center;
  justify-content: center;
  background: var(--color-pitch-black);
}

.menu-card {
  max-width: 440px;
  width: 90%;
  padding: 44px 32px;
  background: var(--liquid-glass-bg);
  border: 1px solid var(--liquid-glass-border);
  border-top: 1px solid var(--liquid-glass-border-top);
  border-bottom: 2px solid var(--theme-accent);
  border-radius: var(--radius-modal);
  text-align: center;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.95), 0 0 30px rgba(2, 132, 199, 0.2);
}

.brand-title {
  font-family: var(--font-aeonikpro);
  font-size: 54px;
  font-weight: 900;
  letter-spacing: 0.12em;
  color: #ffffff;
  margin-bottom: 14px;
  text-shadow: 0 0 28px var(--theme-accent-glow);
}

.brand-desc {
  font-size: 14px;
  color: var(--color-moon-mist);
  margin-bottom: 28px;
  line-height: 1.6;
}

.menu-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.menu-actions .hud-btn {
  min-height: 46px;
  font-size: 14px;
}