/* Shared top nav — matches home / crypto-tool / legal navbar-modern */

:root {
  --brand-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --tech-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --accent-color: #00f2fe;
}

[data-theme="dark"] {
  --bg-primary: #0a0a0a;
  --card-bg: rgba(255, 255, 255, 0.05);
  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.8);
  --border-color: rgba(255, 255, 255, 0.1);
  --navbar-bg: rgba(10, 10, 10, 0.9);
}

[data-theme="light"] {
  --bg-primary: #ffffff;
  --card-bg: rgba(0, 0, 0, 0.05);
  --text-primary: #1a1a1a;
  --text-secondary: rgba(0, 0, 0, 0.7);
  --border-color: rgba(0, 0, 0, 0.1);
  --navbar-bg: rgba(255, 255, 255, 0.9);
}

.navbar-modern.site-nav {
  box-sizing: border-box;
  background: var(--navbar-bg);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 1.25rem;
  position: fixed;
  left: 0;
  right: 0;
  top: 0;
  width: auto;
  max-width: 100%;
  z-index: 1000;
}

/* ponytail: 顶栏贴边但不吃滚动条宽度；padding 在 nav 上，避免 100%+padding 撑破 */
.site-nav .container {
  box-sizing: border-box;
  width: 100%;
  max-width: none;
  padding: 0;
  margin: 0;
}

.site-nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-nav .navbar-brand-modern {
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.site-nav .brand-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  overflow: hidden;
  flex-shrink: 0;
}

.site-nav .brand-icon img {
  width: 100%;
  height: 100%;
  display: block;
}

.site-nav .navbar-nav-modern {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.site-nav .nav-link-modern {
  color: var(--text-primary);
  text-decoration: none;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 500;
  border: none;
  background: transparent;
}

.site-nav .nav-link-modern:hover,
.site-nav .nav-link-modern.is-active {
  color: var(--accent-color);
  background: rgba(79, 172, 254, 0.1);
}

.site-nav .lang-toggle {
  color: var(--text-primary);
  text-decoration: none;
  padding: 0.45rem 0.75rem;
  margin-left: 0.35rem;
  border-radius: 20px;
  border: 1px solid var(--border-color);
  background: var(--card-bg);
  font-size: 0.88rem;
  font-weight: 600;
  line-height: 1.2;
}

.site-nav .lang-toggle:hover {
  color: var(--accent-color);
  border-color: var(--accent-color);
  background: rgba(79, 172, 254, 0.1);
}

.site-nav .theme-toggle {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 0.5rem;
  margin-left: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  color: inherit;
}

.site-nav .theme-toggle:hover {
  background: rgba(79, 172, 254, 0.1);
  border-color: var(--accent-color);
}

.site-nav .theme-toggle i {
  color: var(--text-secondary);
}

.site-nav .theme-toggle:hover i {
  color: var(--accent-color);
}

@media (max-width: 576px) {
  .site-nav {
    padding: 0.7rem 0.85rem;
  }

  .site-nav .navbar-brand-modern {
    font-size: 1.2rem;
  }

  .site-nav .nav-link-modern {
    padding: 0.45rem 0.55rem;
    font-size: 0.9rem;
  }

  .site-nav .theme-toggle {
    margin-left: 0.35rem;
  }
}