Revisione/app/components/TheSidebar.vue

<template>
  <aside class="sidebar">

    <!-- logo -->
    <div class="sidebar-logo">
      <div class="logo-icon">
        <svg width="16" height="16" viewBox="0 0 16 16" fill="none">
          <path d="M2 12V4l6-2 6 2v8l-6 2-6-2z" fill="white" opacity="0.9"/>
          <path d="M8 2v12M2 4l6 2 6-2" stroke="white" stroke-width="1.2" stroke-opacity="0.6" fill="none"/>
        </svg>
      </div>
      <span class="logo-text">Revisi<span class="logo-accent">.one</span></span>
    </div>

    <!-- nav -->
    <nav class="sidebar-nav">
      <NuxtLink to="/" class="nav-item" :class="{ 'nav-item--active': isActive('/') }" exact-active-class="">
        <svg class="nav-icon" width="17" height="17" viewBox="0 0 20 20" fill="none" stroke="currentColor" stroke-width="1.6" stroke-linecap="round" stroke-linejoin="round">
          <path d="M3 9.5L10 3l7 6.5V17a1 1 0 01-1 1H4a1 1 0 01-1-1V9.5z"/>
          <path d="M7 18V11h6v7"/>
        </svg>
        Dashboard
      </NuxtLink>

      <NuxtLink to="/new" class="nav-item" active-class="nav-item--active">
        <svg class="nav-icon" width="17" height="17" viewBox="0 0 20 20" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round">
          <path d="M10 4v12M4 10h12"/>
        </svg>
        New Course
      </NuxtLink>
    </nav>

    <!-- user -->
    <div class="sidebar-user">
      <div class="user-avatar">
        {{ initials }}
      </div>
      <div class="user-info">
        <div class="user-name">{{ name }}</div>
        <div class="user-sub">Student</div>
      </div>
    </div>

  </aside>
</template>

<script setup lang="ts">
const route = useRoute();

// just a placeholder — real auth would provide this
const name = "You";
const initials = "YO";

function isActive(path: string): boolean {
  if (path === "/") {
    return route.path === "/" || route.path.startsWith("/course/");
  }
  return route.path.startsWith(path);
}
</script>

<style scoped>
.sidebar {
  width: var(--sidebar-w);
  min-height: 100vh;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
}

.sidebar-logo {
  padding: 28px 24px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--r-sm);
  background: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.logo-text {
  font-family: "Lora", serif;
  font-weight: 600;
  font-size: 17px;
  letter-spacing: -0.3px;
  color: var(--text);
}

.logo-accent {
  color: var(--accent);
}

.sidebar-nav {
  padding: 16px 12px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-item {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: var(--r-sm);
  background: transparent;
  color: var(--text-2);
  font-weight: 400;
  font-size: 14px;
  text-decoration: none;
  transition: all 0.15s;
}

.nav-item:hover {
  background: var(--surface-2);
}

.nav-item--active {
  background: var(--accent-dim) !important;
  color: var(--accent) !important;
  font-weight: 600;
}

.nav-item--active .nav-icon {
  color: var(--accent);
}

.nav-icon {
  flex-shrink: 0;
  color: var(--text-3);
  transition: color 0.15s;
}

.nav-item:hover .nav-icon {
  color: var(--text-2);
}

.nav-item--active .nav-icon {
  color: var(--accent);
}

.sidebar-user {
  padding: 16px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
}

.user-avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: linear-gradient(135deg, oklch(72% 0.12 65), oklch(58% 0.14 44));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 12px;
  font-weight: 600;
  flex-shrink: 0;
}

.user-info {
  flex: 1;
  min-width: 0;
}

.user-name {
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
  line-height: 1.3;
}

.user-sub {
  font-size: 12px;
  color: var(--text-3);
  line-height: 1.3;
}
</style>