.site-header {
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--header-bg);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border, #1a2332);
}

.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: 18px;
}

.site-nav { display: flex; align-items: center; gap: 18px; margin-left: auto; }
.site-nav-links, .site-nav-auth { display: flex; align-items: center; gap: 12px; }
.site-nav-auth { margin-left: auto; }
.site-nav-auth .theme-toggle { margin-left: 4px; }
.topbar-links { margin-left: auto; }

.site-nav-link,
.site-nav-button {
  font-size: 0.95rem;
  color: var(--text-dim, var(--muted, #8fa3bc));
  font-weight: 500;
  text-decoration: none;
  transition: color .15s, background .15s, border-color .15s;
  white-space: nowrap;
  padding: 6px 10px;
  border-radius: 8px;
  border: 1px solid transparent;
  background: none;
  font-family: var(--font-body, 'Figtree', sans-serif);
  line-height: 1.2;
}
.site-nav-link:hover, .site-nav-button:hover { color: var(--text, #e8eff8); }
.site-nav-link.active {
  color: var(--green, #00e57a);
  background: rgba(0,229,122,0.08);
  border-color: rgba(0,229,122,0.22);
}
.site-nav-auth.is-logged-in .site-nav-link,
.site-nav-auth.is-logged-in .site-nav-button {
  padding-left: 0;
  padding-right: 0;
}
.site-nav-button { cursor: pointer; }
.site-nav-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--green, #00e57a);
  color: var(--contrast-text-2);
  font-weight: 700;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.site-nav-signup, .site-nav-login { white-space: nowrap; }
.site-nav-toggle { display: none; background: none; border: none; color: var(--text, #e8eff8); font-size: 1.5rem; cursor: pointer; margin-left: auto; }

@media (max-width: 768px) {
  .site-nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border, #1a2332);
    padding: 16px 24px;
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    z-index: 120;
  }
  .site-nav.open { display: flex; }
  .site-nav-links, .site-nav-auth {
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 10px;
  }
  .topbar-links { display: none; }
  .site-nav-auth .btn,
  .site-nav-auth .site-nav-link,
  .site-nav-links .site-nav-link,
  .site-nav-auth .site-nav-button {
    padding: 0;
    border: none;
    background: transparent;
    box-shadow: none;
    color: var(--text-dim, var(--muted, #8fa3bc));
    width: auto;
    justify-content: flex-start;
    text-align: left;
    font-weight: 500;
    font-size: 1.1rem;
  }
  .site-nav-link.active {
    color: var(--text-dim, var(--muted, #8fa3bc));
    background: transparent;
    border-color: transparent;
  }
  .site-nav-auth .site-nav-avatar { display: none; }
  .site-nav-toggle { display: block; }
}


.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  width: 38px;
  height: 38px;
  padding: 0;
  border-radius: 10px;
  border: 1px solid var(--theme-toggle-border);
  background: var(--theme-toggle-bg);
  color: var(--theme-toggle-text);
  cursor: pointer;
  font-family: var(--font-body, 'Figtree', sans-serif);
  font-size: 0.95rem;
  line-height: 1;
  transition: background .15s, border-color .15s, color .15s;
  flex-shrink: 0;
}
.theme-toggle:hover {
  background: var(--theme-toggle-hover-bg);
  color: var(--text);
}
.theme-toggle-icon { font-size: 1rem; }
.theme-toggle-label {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
@media (max-width: 768px) {
  .site-nav-auth .theme-toggle {
    margin-left: 0;
  }
  .theme-toggle {
    width: auto;
    height: auto;
    padding: 0;
    border: none;
    background: transparent;
    border-radius: 0;
    justify-content: flex-start;
    color: var(--text-dim, var(--muted, #8fa3bc));
    font-size: 1.1rem;
  }
  .theme-toggle-icon { display: none; }
  .theme-toggle-label {
    position: static;
    width: auto;
    height: auto;
    margin: 0;
    overflow: visible;
    clip: auto;
    white-space: normal;
  }
}