:root{
  --bg-header: #111111;
  --bg-submenu: #1d1d1d;
  --text-light: #ffffff;
  --accent: #d98c00;
  --border: rgba(255,255,255,0.08);
  --shadow: 0 12px 30px rgba(0,0,0,0.18);
}

.site-header{
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg-header);
  color: var(--text-light);
  box-shadow: var(--shadow);
}

.header-inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  gap: 20px;
}

.brand{
  color: var(--text-light);
  text-decoration: none;
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.3px;
}

.menu-toggle{
  display: none;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-light);
  border-radius: 10px;
  padding: 10px 14px;
  cursor: pointer;
  font-size: 1.2rem;
}

.site-nav{
  display: flex;
}

.nav-list{
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-list > li{
  position: relative;
}

.nav-list > li > a,
.submenu-toggle{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 10px 14px;
  border: none;
  background: transparent;
  color: var(--text-light);
  text-decoration: none;
  cursor: pointer;
  font: inherit;
  border-radius: 10px;
}

.nav-list > li > a:hover,
.submenu-toggle:hover,
.nav-list > li > a.active{
  background: rgba(255,255,255,0.08);
  color: #fff;
}

.submenu{
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 280px;
  background: var(--bg-submenu);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 10px;
  margin: 0;
  list-style: none;
  box-shadow: var(--shadow);
  display: none;
}

.has-submenu.open .submenu{
  display: block;
}

.submenu li a{
  display: block;
  padding: 10px 12px;
  color: var(--text-light);
  text-decoration: none;
  border-radius: 10px;
}

.submenu li a:hover{
  background: rgba(255,255,255,0.08);
}

.separator{
  height: 1px;
  background: var(--border);
  margin: 8px 0;
}

@media (max-width: 900px){
  .menu-toggle{
    display: inline-flex;
  }

  .site-nav{
    display: none;
    width: 100%;
  }

  .site-nav.open{
    display: block;
  }

  .header-inner{
    flex-wrap: wrap;
    padding-top: 10px;
    padding-bottom: 10px;
  }

  .nav-list{
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    padding: 10px 0 4px;
  }

  .nav-list > li > a,
  .submenu-toggle{
    width: 100%;
    justify-content: flex-start;
  }

  .submenu{
    position: static;
    min-width: 100%;
    margin-top: 8px;
  }
}