body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, sans-serif;
  background: #0b0f1a;
  color: white;
}

/* КОНТЕНТ */
#content {
  padding-bottom: 140px;
}

/* БОЛЬШИЕ КНОПКИ */
.big-buttons {
  display: flex;
  gap: 15px;
  padding: 20px;
}

.big-btn {
  flex: 1;
  height: 80px; /* ВАЖНО — огромные */
  border-radius: 20px;
  font-size: 20px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
}

.big-btn.blue {
  background: #2f7bff;
}

.big-btn.outline {
  border: 2px solid #2f7bff;
  color: #2f7bff;
}

/* АВАТАР */
.profile {
  text-align: center;
  margin-top: 40px;
}

.avatar-big {
  width: 120px;
  height: 120px;
  border-radius: 50%;
}

/* НИЖНЕЕ МЕНЮ */
.nav {
  position: fixed;
  bottom: 10px;
  left: 10px;
  right: 10px;
  height: 80px;
  display: flex;
  justify-content: space-around;
  align-items: center;
  border-radius: 30px;
  background: rgba(255,255,255,0.08);
  backdrop-filter: blur(20px);
}

.tab {
  font-size: 18px;
  padding: 10px 20px;
  border-radius: 15px;
}

.tab.active {
  background: rgba(77,166,255,0.2);
  color: #4da6ff;
}