body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background: linear-gradient(to right, #0f2027, #203a43, #2c5364);
  color: #f0f0f0;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: rgba(0, 0, 0, 0.7);
  padding: 20px;
  border-bottom: 2px solid #00ffff;
  flex-wrap: wrap;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.header-right {
  display: flex;
  align-items: center;
}

.logo {
  width: 40px;
  height: 40px;
  transition: width 0.3s, height 0.3s;
}

header h1 {
  font-size: 2em;
  margin: 0;
  color: #00ffff;
  transition: font-size 0.3s;
}

#searchInput {
  padding: 6px 10px;
  font-size: 1em;
  border-radius: 4px;
  border: none;
  transition: opacity 0.3s ease;
}

.menu-btn {
  font-size: 1.5em;
  background: none;
  border: none;
  color: #00ffff;
  cursor: pointer;
}

.subtitle {
  width: 100%;
  text-align: center;
  font-size: 1.1em;
  color: #ccc;
  margin-top: 10px;
}

@media (max-width: 768px) {
  .logo {
    width: 30px;
    height: 30px;
  }

  header h1 {
    font-size: 1.5em;
  }

  #searchInput {
    display: none;
  }

  header {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }

  .header-left {
    order: 1;
    flex: 1;
    justify-content: flex-start;
  }

  .header-right {
    order: 2;
    flex: 0;
    justify-content: flex-end;
  }

  .menu-btn {
    font-size: 1.3em;
  }

  .subtitle {
    order: 3;
    width: 100%;
    text-align: center;
    margin-top: 10px;
  }
}