.theme-toggle-button {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 18px;
  border: none;
  border-left: 1px solid var(--border2);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  font-size: 0.76rem;
  transition: color 0.12s, background 0.12s;
}

.theme-toggle-button:hover,
.theme-toggle-button:focus-visible {
  background: var(--surface);
  color: var(--text);
  outline: none;
}

.theme-toggle-label {
  color: var(--dim);
  font-size: 0.64rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.theme-toggle-value {
  color: var(--text);
  font-weight: 700;
}

.mobile-nav-theme-toggle {
  display: none;
}

:root[data-theme="tui"] {
  --bg: #ffffff;
  --surface: #f8fbff;
  --surface2: #eff6ff;
  --border: #dbeafe;
  --border2: #bfdbfe;
  --border3: #93c5fd;
  --purple: #2563eb;
  --purple-deep: #1d4ed8;
  --purple-faint: rgba(37, 99, 235, 0.08);
  --text: #0f172a;
  --muted: #475569;
  --dim: #64748b;
  --green: #16a34a;
  --amber: #d97706;
  --blue: #0284c7;
}

:root[data-theme="tui"] body {
  background: #ffffff;
  color: var(--text);
}

:root[data-theme="tui"] nav {
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 2px solid var(--purple-deep);
  backdrop-filter: blur(12px);
}

:root[data-theme="tui"] .nav-brand-mark,
:root[data-theme="tui"] .footer-brand-mark {
  background: linear-gradient(135deg, var(--purple-deep), #60a5fa);
  color: #ffffff;
}

:root[data-theme="tui"] .hero-tag,
:root[data-theme="tui"] .section-tag,
:root[data-theme="tui"] .pricing-contact-tag,
:root[data-theme="tui"] .price-badge,
:root[data-theme="tui"] .ent-badge,
:root[data-theme="tui"] .step-num,
:root[data-theme="tui"] .t-prompt {
  color: var(--purple-deep);
}

:root[data-theme="tui"] .hero-tag {
  border-color: rgba(37, 99, 235, 0.18);
  background: rgba(239, 246, 255, 0.8);
}

:root[data-theme="tui"] .hero-blink {
  background: var(--purple);
}

:root[data-theme="tui"] #features {
  background: var(--surface);
}

:root[data-theme="tui"] .terminal,
:root[data-theme="tui"] .pricing-contact,
:root[data-theme="tui"] .price-enterprise {
  box-shadow: 0 18px 48px rgba(37, 99, 235, 0.06);
}

:root[data-theme="tui"] .price-enterprise {
  background:
    linear-gradient(180deg, rgba(239, 246, 255, 0.96), rgba(255, 255, 255, 0.98)),
    #ffffff;
}

:root[data-theme="tui"] .pricing-contact,
:root[data-theme="tui"] footer {
  background: #ffffff;
}

:root[data-theme="tui"] .btn-nav-primary,
:root[data-theme="tui"] .btn-primary,
:root[data-theme="tui"] .price-btn-filled,
:root[data-theme="tui"] .ent-cta,
:root[data-theme="tui"] .pricing-contact-cta:hover,
:root[data-theme="tui"] .mobile-nav-primary {
  color: #ffffff;
}

:root[data-theme="tui"] .btn-outline:hover,
:root[data-theme="tui"] .price-btn-border:hover,
:root[data-theme="tui"] .footer-links li a:hover,
:root[data-theme="tui"] .channel-pill:hover {
  background: rgba(239, 246, 255, 0.88);
}

:root[data-theme="tui"] .pricing-contact-cta {
  background: #ffffff;
}

:root[data-theme="tui"] .theme-toggle-value {
  color: var(--purple-deep);
}

:root[data-theme="tui"] .mobile-nav-panel {
  background: rgba(255, 255, 255, 0.98);
}

@media (max-width: 768px) {
  .mobile-nav-theme-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    width: 100%;
    margin-top: 14px;
    padding: 14px 16px;
    border: 1px solid var(--border2);
    background: var(--surface);
    color: var(--text);
    font: inherit;
    font-size: 0.9rem;
    line-height: 1.4;
    cursor: pointer;
  }

  .mobile-nav-theme-toggle:focus-visible {
    outline: none;
    border-color: var(--border3);
  }

  :root[data-theme="tui"] .mobile-nav-theme-toggle {
    background: rgba(239, 246, 255, 0.94);
  }
}