.site-header {
  --nv-bg: rgba(12, 12, 18, .72);
  --nv-bg-solid: rgba(12, 12, 18, .9);
  --nv-line: rgba(255, 255, 255, .09);
  --nv-text: #9a9aa8;
  --nv-hi: #ffffff;
  --nv-hover: rgba(255, 255, 255, .06);
  --nv-panel: rgba(16, 16, 24, .96);
  --nv-overlay: rgba(8, 8, 14, .98);
  --nv-accent: #8b5cf6;
  --nv-accent-solid: #7c3aed;
  --nv-gold: #fbbf24;
  --nv-shadow: 0 10px 30px rgba(0, 0, 0, .28);

  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: transparent;
  border: none;
  box-shadow: none;
}

body.light-mode .site-header {
  --nv-bg: rgba(255, 255, 255, .78);
  --nv-bg-solid: rgba(255, 255, 255, .94);
  --nv-line: rgba(15, 23, 42, .1);
  --nv-text: #5b6178;
  --nv-hi: #1c2140;
  --nv-hover: rgba(15, 23, 42, .05);
  --nv-panel: #ffffff;
  --nv-overlay: rgba(255, 255, 255, .98);
  --nv-accent: #6d28d9;
  --nv-accent-solid: #6d28d9;
  --nv-gold: #b45309;
  --nv-shadow: 0 10px 30px rgba(30, 27, 75, .1);
}

.header-glow, .header-divider { display: none; }

.site-header .header-inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: .5rem;
  width: calc(100% - 24px);
  max-width: 1240px;
  min-height: 0;
  margin: 12px auto 0;
  padding: .4rem .5rem;
  background: var(--nv-bg);
  backdrop-filter: blur(18px) saturate(1.3);
  -webkit-backdrop-filter: blur(18px) saturate(1.3);
  border: 1px solid var(--nv-line);
  border-radius: 16px;
  box-shadow: var(--nv-shadow);
  transition: background .25s ease;
}
.site-header.scrolled .header-inner { background: var(--nv-bg-solid); }

.logo {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .2rem .6rem .2rem .2rem;
  border-radius: 12px;
  text-decoration: none;
  color: var(--nv-hi);
  transition: background .18s ease;
}
.logo:hover { background: var(--nv-hover); }
.logo a { display: flex; align-items: center; text-decoration: none; color: inherit; }
.logo-img { width: 36px; height: 36px; object-fit: contain; display: block; border-radius: 10px; }
.logo-text { display: flex; flex-direction: column; line-height: 1.1; }
.logo-text strong { font-size: .92rem; font-weight: 700; letter-spacing: .06em; color: var(--nv-hi); }
.logo-text small { font-size: .62rem; font-weight: 500; letter-spacing: .16em; color: var(--nv-text); }

.main-nav {
  display: flex;
  align-items: center;
  gap: 2px;
  margin: 0;
  padding: 0;
  max-width: 100%;
  background: transparent;
  border: none;
  box-shadow: none;
}
@media (min-width: 1201px) {
  .main-nav {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
  }
  .header-actions {
    margin-left: auto;
  }
}

.main-nav a,
.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .55rem .8rem;
  border-radius: 10px;
  font-size: .85rem;
  font-weight: 500;
  line-height: 1;
  white-space: nowrap;
  color: var(--nv-text);
  background: transparent;
  border: none;
  text-decoration: none;
  transition: color .15s ease, background .15s ease;
}
.main-nav a svg, .nav-link svg { width: 16px; height: 16px; flex-shrink: 0; opacity: .7; transition: opacity .15s ease, color .15s ease; }
.main-nav a:hover, .nav-link:hover { color: var(--nv-hi); background: var(--nv-hover); }
.main-nav a:hover svg, .nav-link:hover svg { opacity: 1; }

.main-nav a.active, .nav-link.active { color: var(--nv-hi); background: transparent; }
.main-nav a.active svg, .nav-link.active svg { opacity: 1; color: var(--nv-accent); }
.nav-link::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 1px;
  width: 4px;
  height: 4px;
  margin-left: -2px;
  border-radius: 50%;
  background: var(--nv-accent);
  transform: scale(0);
  transition: transform .2s ease;
}
.main-nav a.active::after, .nav-link.active::after { transform: scale(1); }

.nav-link.nav-admin { color: var(--nv-gold); }
.nav-link.nav-admin:hover { color: var(--nv-gold); background: rgba(251, 191, 36, .1); }
.nav-link.nav-admin.active { color: var(--nv-gold); }
.nav-link.nav-admin.active svg, .nav-link.nav-admin::after { color: var(--nv-gold); background: var(--nv-gold); }

.nav-drop { position: relative; }
.nav-drop-toggle { cursor: pointer; font-family: inherit; }
.nav-caret { width: 12px; height: 12px; opacity: .5; transition: transform .2s ease, opacity .2s ease; }
.nav-drop:hover .nav-caret, .nav-drop:focus-within .nav-caret, .nav-drop.open .nav-caret { transform: rotate(180deg); opacity: 1; }

.nav-drop-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  min-width: 220px;
  padding: 10px .4rem .4rem;
  display: flex;
  flex-direction: column;
  gap: 2px;
  background: transparent;
  border: none;
  box-shadow: none;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateX(-50%) translateY(10px);
  transition: opacity .18s ease, transform .18s ease, visibility .18s;
  z-index: 1002;
}
.nav-drop-menu-inner {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: .4rem;
  background: var(--nv-panel);
  backdrop-filter: blur(22px) saturate(1.3);
  -webkit-backdrop-filter: blur(22px) saturate(1.3);
  border: 1px solid var(--nv-line);
  border-radius: 14px;
  box-shadow: var(--nv-shadow);
  overflow: hidden;
}
.nav-drop.open .nav-drop-menu {
  opacity: 1; visibility: visible; pointer-events: auto; transform: translateX(-50%) translateY(0);
}
.nav-drop-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .62rem .8rem;
  border-radius: 10px;
  font-size: .85rem;
  font-weight: 500;
  color: var(--nv-text);
  text-decoration: none;
  white-space: nowrap;
  transition: background .15s ease, color .15s ease;
}
.nav-drop-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 20%;
  bottom: 20%;
  width: 3px;
  border-radius: 3px;
  background: var(--nv-accent);
  transform: scaleY(0);
  transition: transform .16s ease;
}
.nav-drop-item svg { width: 16px; height: 16px; opacity: .6; flex-shrink: 0; }
.nav-drop-item:hover { background: var(--nv-hover); color: var(--nv-hi); }
.nav-drop-item:hover::before { transform: scaleY(1); }
.nav-drop-item:hover svg { opacity: 1; }
.nav-drop-item.active { color: var(--nv-hi); background: var(--nv-hover); }
.nav-drop-item.active::before { transform: scaleY(1); }
.nav-drop-item.active svg { opacity: 1; color: var(--nv-accent); }

.main-nav a.nav-cta {
  margin-left: .35rem;
  padding: .6rem 1rem;
  font-size: .84rem;
  font-weight: 600;
  color: #fff;
  background: var(--nv-accent-solid);
  border-radius: 10px;
  transition: background .15s ease, transform .15s ease;
}
.main-nav a.nav-cta svg { opacity: .9; color: #fff; }
.main-nav a.nav-cta::after { display: none; }
.main-nav a.nav-cta:hover { color: #fff; background: #6d28d9; transform: translateY(-1px); }
.main-nav a.nav-cta.active { color: #fff; background: var(--nv-accent-solid); box-shadow: 0 0 0 2px var(--nv-bg-solid), 0 0 0 4px var(--nv-accent); }
.main-nav a.nav-cta.active svg { color: #fff; }

.main-nav a.nav-cta-outline {
  color: var(--nv-gold);
  background: transparent;
  box-shadow: inset 0 0 0 1px rgba(251, 191, 36, .45);
}
body.light-mode .main-nav a.nav-cta-outline { box-shadow: inset 0 0 0 1px rgba(180, 83, 9, .45); }
.main-nav a.nav-cta-outline svg { color: var(--nv-gold); }
.main-nav a.nav-cta-outline:hover { color: var(--nv-gold); background: rgba(251, 191, 36, .12); transform: translateY(-1px); }
.main-nav a.nav-cta-outline.active { background: rgba(251, 191, 36, .12); box-shadow: inset 0 0 0 1px var(--nv-gold); }
.main-nav a.nav-cta.nav-cta-outline,
.main-nav a.nav-cta.nav-cta-outline.active,
.main-nav a.nav-cta.nav-cta-outline:hover {
  color: var(--nv-gold);
  background: transparent;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: .25rem;
  flex-shrink: 0;
  margin-left: auto;
  padding: 0;
  background: transparent;
  border: none;
}
.header-actions form { display: inline-flex; margin: 0; }

.theme-toggle,
.lang-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 36px;
  border-radius: 10px;
  border: none;
  background: transparent;
  color: var(--nv-text);
  font-family: inherit;
  cursor: pointer;
  transition: background .15s ease, color .15s ease;
}
.theme-toggle { width: 36px; flex-shrink: 0; }
.theme-toggle:hover, .lang-toggle:hover { background: var(--nv-hover); color: var(--nv-hi); }
.theme-toggle .theme-icon-sun { display: none; }

.lang-switcher { position: relative; }
.lang-toggle { gap: .4rem; padding: 0 .6rem; font-size: .78rem; font-weight: 600; white-space: nowrap; }
.flag-img { border-radius: 3px; display: block; }
.lang-dropdown {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  min-width: 170px;
  padding: .35rem;
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--nv-panel);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid var(--nv-line);
  border-radius: 14px;
  box-shadow: var(--nv-shadow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition: opacity .16s ease, transform .16s ease, visibility .16s;
  z-index: 1002;
}
.lang-dropdown.open { opacity: 1; visibility: visible; transform: translateY(0); }
.lang-option {
  display: flex;
  align-items: center;
  gap: .55rem;
  padding: .55rem .7rem;
  border-radius: 9px;
  font-size: .84rem;
  font-weight: 500;
  color: var(--nv-text);
  text-decoration: none;
  transition: background .15s ease, color .15s ease;
}
.lang-option:hover { background: var(--nv-hover); color: var(--nv-hi); }
.lang-option.active { color: var(--nv-hi); background: var(--nv-hover); }

.btn-login {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .45rem;
  height: 36px;
  padding: 0 1rem;
  border-radius: 10px;
  border: none;
  background: var(--nv-accent-solid);
  color: #fff;
  font-size: .84rem;
  font-weight: 600;
  white-space: nowrap;
  text-decoration: none;
  transition: background .15s ease;
}
.btn-login:hover { background: #6d28d9; }

.btn-profile {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .55rem;
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: 50%;
  border: none;
  background: transparent;
  color: var(--nv-hi);
  text-decoration: none;
  transition: background .15s ease;
}
.btn-profile:hover { background: var(--nv-hover); }
.btn-profile .profile-avatar {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  border: none;
  background: var(--nv-hover);
  box-shadow: 0 0 0 2px var(--nv-line);
  transition: box-shadow .15s ease;
}
.btn-profile:hover .profile-avatar { box-shadow: 0 0 0 2px var(--nv-accent); }
.btn-profile .profile-name { display: none; font-size: .85rem; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 120px; color: var(--nv-hi); }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
  width: 38px;
  height: 38px;
  margin-left: auto;
  border-radius: 10px;
  background: transparent;
  border: none;
  cursor: pointer;
  transition: background .15s ease;
}
.nav-toggle:hover { background: var(--nv-hover); }
.nav-toggle span { width: 18px; height: 2px; border-radius: 2px; background: var(--nv-hi); transition: transform .25s ease, opacity .2s ease; }
.nav-toggle.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.site-header a:focus-visible, .site-header button:focus-visible { outline: 2px solid var(--nv-accent); outline-offset: 2px; }
@media (prefers-reduced-motion: reduce) { .site-header * { transition: none !important; animation: none !important; } }

@keyframes navSlide { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: translateY(0); } }

.profile-header-actions { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; flex: 1; }
.footer-logo-text h4 { font-size: 1.5rem; font-weight: 700; margin: 0 0 .5rem; background: linear-gradient(135deg, #a78bfa 0%, #c084fc 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.footer-logo-text p { color: var(--text-secondary); margin: 0; font-size: .95rem; line-height: 1.6; max-width: 300px; }
body.light-mode .footer-logo-text h4 { background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
body.light-mode .footer-logo-text p { color: rgba(28, 33, 64, .65); }
@media (max-width: 768px) {
  .profile-header-actions { flex-direction: column; width: 100%; gap: 1rem; }
  .footer-logo-text h4 { font-size: 1.25rem; }
}

@media (max-width: 1200px) {
  .site-header .header-inner { flex-wrap: nowrap; }
  .logo-text { display: none; }
  .nav-toggle { display: flex; position: relative; z-index: 1001; }
  .main-nav { display: none; }
  .header-actions { display: none; }

  .main-nav.open {
    position: fixed;
    inset: 0;
    z-index: 998;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: .4rem;
    width: 100%;
    height: 100vh;
    height: 100dvh;
    margin: 0;
    padding: 84px 1.1rem 8rem;
    overflow-y: auto;
    overscroll-behavior: contain;
    background: var(--nv-overlay);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    animation: navSlide .22s ease;
  }
  .main-nav.open > *,
  .main-nav.open .nav-drop-menu > * { width: 100%; max-width: 480px; margin-left: auto; margin-right: auto; }

  .main-nav a, .nav-link, .main-nav a.nav-cta {
    justify-content: flex-start;
    padding: .85rem 1rem;
    font-size: .95rem;
    border-radius: 12px;
    background: var(--nv-hover);
  }
  .main-nav a.nav-cta { justify-content: center; margin: .5rem auto 0; background: var(--nv-accent-solid); }
  .main-nav a.nav-cta-outline { background: transparent; }
  .nav-link::after { display: none; }
  .main-nav a.active, .nav-link.active { background: var(--nv-hover); box-shadow: inset 2px 0 0 var(--nv-accent); border-radius: 12px; }

  
  .nav-drop-toggle { display: none; }
  .nav-drop, .nav-drop-menu { display: contents; opacity: 1; visibility: visible; pointer-events: auto; transform: none; }
  .nav-drop-item { justify-content: flex-start; padding: .85rem 1rem; font-size: .95rem; border-radius: 12px; background: var(--nv-hover); }
  .nav-drop-item.active { box-shadow: inset 2px 0 0 var(--nv-accent); }

  .header-actions.open {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 999;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: .6rem;
    width: 100%;
    margin: 0;
    padding: 1rem 1.2rem calc(1rem + env(safe-area-inset-bottom));
    background: var(--nv-overlay);
    border-top: 1px solid var(--nv-line);
    animation: navSlide .22s ease;
  }
  .header-actions.open .lang-switcher { flex: 1 1 0; min-width: 0; }
  .header-actions.open .lang-toggle { width: 100%; justify-content: space-between; height: 42px; background: var(--nv-hover); }
  .header-actions.open .lang-dropdown { top: auto; bottom: calc(100% + 8px); right: 0; left: 0; }
  .header-actions.open .theme-toggle { flex: 0 0 42px; width: 42px; height: 42px; background: var(--nv-hover); }
  .header-actions.open .btn-login { flex: 1 1 100%; width: 100%; height: 44px; font-size: .9rem; }
  .header-actions.open .btn-profile { flex: 1 1 100%; width: 100%; height: 44px; border-radius: 12px; background: var(--nv-hover); justify-content: flex-start; padding: 0 .7rem; }
  .header-actions.open .btn-profile .profile-name { display: inline-flex; }
}

@media (max-width: 640px) {
  .site-header .header-inner { width: calc(100% - 16px); margin-top: 8px; padding: .35rem .45rem; border-radius: 14px; }
  .logo-img { width: 34px; height: 34px; }
}