/* Full-width top bar + auth modal tabs + footer language */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
}

.nav-bar {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 64px;
  padding: 0;
  border-bottom: 1px solid rgba(0, 229, 255, 0.12);
  backdrop-filter: blur(16px);
}

.nav-bar-inner {
  width: 100%;
  max-width: 1400px;
  display: grid;
  grid-template-columns: minmax(140px, auto) 1fr minmax(160px, auto);
  align-items: center;
  gap: var(--spacing-lg);
  padding: 0 var(--spacing-xl);
  min-height: 64px;
}

.nav-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none !important;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.nav-logo img {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.nav-logo .logo-text span { color: var(--color-accent-cyan); }

.nav-tabs {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(12px, 2.5vw, 32px);
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}

.nav-tabs a {
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  opacity: 0.82;
  padding: 8px 4px;
  border-bottom: 2px solid transparent;
  transition: opacity 0.15s, border-color 0.15s;
  white-space: nowrap;
}

.nav-tabs a:hover,
.nav-tabs a.active {
  opacity: 1;
  border-bottom-color: var(--color-accent-cyan);
}

.nav-right {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--spacing-sm);
}

.nav-greeting {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent-lime);
  white-space: nowrap;
}

.nav-light .nav-greeting { color: var(--color-accent-violet-deep); }

.nav-auth {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.nav-auth[hidden],
.nav-greeting[hidden] { display: none !important; }

.footer-lang {
  max-width: var(--container-max);
  margin: var(--spacing-xl) auto 0;
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-hairline-cloud);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.footer-lang-label {
  font-size: 13px;
  font-weight: 600;
  color: #6b7280;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.footer .lang-switch {
  background: #f3f4f6;
  border-color: var(--color-hairline-cloud);
}

.footer .lang-switch button { color: #6b7280; }

/* Auth modal tabs */
.auth-modal-tabs {
  display: flex;
  gap: 0;
  margin-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--color-hairline-violet);
}

.modal-light .auth-modal-tabs { border-color: var(--color-hairline-cloud); }

.auth-modal-tab {
  flex: 1;
  padding: 10px 16px;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--color-on-dark-muted);
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  margin-bottom: -1px;
  transition: color 0.15s, border-color 0.15s;
}

.modal-light .auth-modal-tab { color: #6b7280; }

.auth-modal-tab.active {
  color: var(--color-accent-lime);
  border-bottom-color: var(--color-accent-lime);
}

.modal-light .auth-modal-tab.active {
  color: var(--color-accent-violet-deep);
  border-bottom-color: var(--color-accent-violet-deep);
}

.form-error {
  font-size: 13px;
  color: #fa7faa;
  margin-top: var(--spacing-sm);
  min-height: 1.2em;
}

.form-error:empty { display: none; }

.toast {
  position: fixed;
  top: 80px;
  left: 50%;
  transform: translateX(-50%) translateY(-12px);
  background: linear-gradient(135deg, #1f1633, #422082);
  color: #fff;
  border: 1px solid rgba(194, 239, 78, 0.4);
  padding: 12px 24px;
  border-radius: var(--rounded-md);
  font-size: 14px;
  font-weight: 600;
  z-index: 300;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s, transform 0.25s, visibility 0.25s;
  box-shadow: var(--shadow-neon);
  max-width: 90vw;
  text-align: center;
}

.toast.show {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

@media (max-width: 900px) {
  .nav-bar-inner {
    grid-template-columns: auto 1fr auto;
  }

  .nav-tabs {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(21, 15, 35, 0.98);
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--color-hairline-violet);
    gap: var(--spacing-sm);
    align-items: stretch;
  }

  .nav-light .nav-tabs { background: #fff; }

  .nav-tabs.open { display: flex; }

  .nav-tabs a {
    padding: 12px 8px;
    border-bottom: none;
    border-left: 3px solid transparent;
  }

  .nav-tabs a.active { border-left-color: var(--color-accent-lime); }

  .site-header { position: relative; }

  .nav-bar { position: sticky; top: 0; flex-wrap: wrap; }

  .nav-bar-inner { position: relative; }
}

@media (max-width: 480px) {
  .nav-auth .btn-auth { padding: 8px 10px; font-size: 11px; }
}