/* =============================================
   nav.css — 统一导航栏样式
   适用于 index.html / radio.html / config.html / admin.html / singer.html
   ============================================= */

.top-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(22, 33, 62, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0 20px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.top-nav-brand {
  font-size: 1rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent), #ff6b81);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
  letter-spacing: -0.5px;
}

.top-nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.top-nav-links li a {
  display: inline-block;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.85rem;
  text-decoration: none;
  transition: all var(--transition);
  white-space: nowrap;
}

.top-nav-links li a:hover {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}

.top-nav-links li a.active {
  color: var(--accent);
  background: var(--accent-glow);
  font-weight: 600;
}

/* 页面顶部留出导航栏空间 */
body.has-nav {
  padding-top: 52px;
}

/* radio.html 全屏收音机页面特殊处理 */
body.radio-page.has-nav {
  padding-top: 52px;
}

@media (max-width: 768px) {
  .top-nav {
    height: 46px;
    padding: 0 12px;
  }
  .top-nav-links li a {
    padding: 6px 10px;
    font-size: 0.78rem;
  }
  .top-nav-brand {
    font-size: 0.9rem;
  }
  body.has-nav {
    padding-top: 46px;
  }
  body.radio-page.has-nav {
    padding-top: 46px;
  }
}