:root {
  --bg-0: #000000;
  --bg-1: #03030a;
  --bg-2: #0a1020;
  --text-primary: rgba(255, 255, 255, 0.82);
  --text-secondary: rgba(255, 255, 255, 0.44);
  --text-live: rgba(236, 255, 242, 0.92);
  --glass: rgba(255, 255, 255, 0.08);
  --glass-border: rgba(255, 255, 255, 0.18);
  --shadow-soft: 0 12px 36px rgba(0, 0, 0, 0.45);
  --shadow-glow: 0 18px 60px rgba(155, 182, 255, 0.2);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  overflow: hidden;
  background:
    radial-gradient(1200px 620px at 50% -15%, rgba(99, 129, 255, 0.16), transparent 62%),
    radial-gradient(900px 540px at 80% 120%, rgba(57, 103, 196, 0.12), transparent 70%),
    linear-gradient(180deg, var(--bg-1) 0%, var(--bg-0) 54%, var(--bg-0) 100%);
  color: var(--text-primary);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Helvetica Neue', sans-serif;
  letter-spacing: -0.01em;
}

.sky-glow {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 18% 24%, rgba(155, 198, 255, 0.14), transparent 34%),
    radial-gradient(circle at 70% 20%, rgba(110, 154, 255, 0.11), transparent 30%),
    radial-gradient(circle at 84% 82%, rgba(98, 135, 255, 0.08), transparent 34%);
  filter: blur(12px);
}

#stars-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
}

.top-bar {
  position: fixed;
  top: 1.1rem;
  left: 1.1rem;
  right: 1.1rem;
  z-index: 8;
  display: flex;
  align-items: center;
  justify-content: space-between;
  pointer-events: none;
}

.brand {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.77rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.presence {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.46rem 0.68rem;
  border-radius: 999px;
  border: 1px solid var(--glass-border);
  background: var(--glass);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  box-shadow: var(--shadow-soft);
}

.presence-dot {
  width: 0.48rem;
  height: 0.48rem;
  border-radius: 999px;
  background: rgba(148, 255, 177, 0.95);
  box-shadow: 0 0 12px rgba(148, 255, 177, 0.6);
  animation: dot-pulse 2.1s ease-out infinite;
}

.presence-label {
  margin: 0;
  color: var(--text-primary);
  font-size: 0.83rem;
  white-space: nowrap;
}

.presence-label strong {
  font-weight: 600;
}

.status-wrap {
  position: fixed;
  left: 50%;
  bottom: 6.2rem;
  z-index: 8;
  transform: translateX(-50%);
  pointer-events: none;
}

#status {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 500;
  text-align: center;
}

#status.online {
  color: var(--text-live);
}

.controls {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 1.25rem;
  z-index: 9;
  display: flex;
  justify-content: center;
}

#trigger-btn {
  appearance: none;
  border: 1px solid var(--glass-border);
  border-radius: 18px;
  padding: 0.82rem 1.48rem;
  min-width: 148px;
  color: var(--text-primary);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.13), rgba(255, 255, 255, 0.06));
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-soft), inset 0 1px 0 rgba(255, 255, 255, 0.26);
  font-size: 0.95rem;
  font-weight: 560;
  letter-spacing: 0.01em;
  cursor: pointer;
  transform: scale(1);
  transition: transform 170ms cubic-bezier(0.2, 0.8, 0.2, 1),
    box-shadow 220ms cubic-bezier(0.2, 0.8, 0.2, 1),
    border-color 220ms ease,
    opacity 120ms ease;
}

#trigger-btn:hover {
  transform: scale(1.02);
  border-color: rgba(255, 255, 255, 0.28);
  box-shadow: var(--shadow-soft), var(--shadow-glow), inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

#trigger-btn:active {
  transform: scale(0.95);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.38), inset 0 1px 0 rgba(255, 255, 255, 0.18);
}

#trigger-btn:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

@keyframes dot-pulse {
  0% {
    opacity: 0.62;
    transform: scale(0.8);
  }

  45% {
    opacity: 1;
    transform: scale(1);
  }

  100% {
    opacity: 0.62;
    transform: scale(0.8);
  }
}

@media (max-width: 640px) {
  .top-bar {
    top: 0.78rem;
    left: 0.78rem;
    right: 0.78rem;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.56rem;
  }

  .status-wrap {
    bottom: 5.6rem;
  }
}