book-hi-code/src/App.vue

<script setup>
</script>

<template>
  <div id="app">
    <main class="app-main">
      <router-view />
    </main>
  </div>
</template>

<style scoped>
.app-header {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 56px;
  padding: 0 16px;
  background: #2e7d32;
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 100;
}

.back-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  border-radius: 50%;
  margin-right: 4px;
}

.back-btn:hover {
  background: rgba(255, 255, 255, 0.2);
}

.brand { 
  font-weight: 600; 
  font-size: 18px;
}

.title { 
  font-size: 16px; 
  opacity: 0.9;
}

.app-main {
  flex: 1;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
}

@media (max-width: 768px) {
  .app-main {
    padding: 12px;
  }
  
  .brand {
    font-size: 16px;
  }
  
  .title {
    font-size: 14px;
  }
}
</style>