* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  -webkit-tap-highlight-color: transparent;
}

body {
  background: #0a0e14;
  color: #fff;
  height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding: calc(env(safe-area-inset-top) + 30px) 24px calc(env(safe-area-inset-bottom) + 30px);
  user-select: none;
  overflow: hidden;
}

.header {
  text-align: center;
  margin-top: 20px;
}

.title {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.status {
  font-size: 15px;
  color: #8b949e;
  margin-top: 6px;
}

.avatar-box {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: radial-gradient(circle, #1f6feb 0%, #0d1117 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 54px;
  box-shadow: 0 0 35px rgba(31, 111, 235, 0.25);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.avatar-box.live {
  transform: scale(1.08);
  box-shadow: 0 0 50px rgba(31, 111, 235, 0.7);
}

.controls {
  display: flex;
  gap: 28px;
  margin-bottom: 25px;
}

.btn-round {
  width: 76px;
  height: 76px;
  border-radius: 50%;
  border: none;
  font-size: 32px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.15s ease;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
}

.btn-round:active {
  transform: scale(0.92);
}

.btn-call {
  background: #238636;
  color: #fff;
}

.btn-hangup {
  background: #da3633;
  color: #fff;
  display: none;
}