* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: #ffffff;
  color: #333333;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  text-align: center;
}

.logo {
  width: 280px;
  max-width: 80vw;
  margin-bottom: 2rem;
}

.titol {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: #2c3e50;
  margin-bottom: 0.5rem;
}

.subtitol {
  font-size: 1.1rem;
  color: #7f8c8d;
  font-weight: 400;
  margin-bottom: 1rem;
}

.linia {
  width: 60px;
  height: 3px;
  background-color: #25d366;
  margin: 1.5rem auto;
  border-radius: 2px;
}

.whatsapp-btn {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background-color: #25d366;
  color: #ffffff;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  text-decoration: none;
  z-index: 1000;
}

.whatsapp-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.3);
}

.whatsapp-btn svg {
  width: 32px;
  height: 32px;
  fill: #ffffff;
}

@media (max-width: 600px) {
  .titol {
    font-size: 1.6rem;
  }

  .subtitol {
    font-size: 0.95rem;
  }

  .logo {
    width: 200px;
  }

  .whatsapp-btn {
    bottom: 20px;
    right: 20px;
    width: 54px;
    height: 54px;
  }

  .whatsapp-btn svg {
    width: 28px;
    height: 28px;
  }
}