/* ==========================================================================
   YLHH Tools — Dark mode (data-theme="dark")
   ========================================================================== */

[data-theme="dark"] {
  color-scheme: dark;

  --color-primary: #5b9fd4;
  --color-primary-dark: #3d7fb8;
  --color-primary-light: #7ab3e0;
  --color-accent: #d4b84a;
  --color-accent-light: #e8cc6a;
  --color-dark: #f1f5f9;
  --color-text: #cbd5e1;
  --color-text-light: #94a3b8;
  --color-bg: #0f172a;
  --color-bg-alt: #1e293b;
  --color-bg-dark: #020617;
  --color-surface: #1e293b;
  --color-header-bg: rgba(15, 23, 42, 0.95);
  --color-input-bg: #0f172a;
  --color-gallery-bg: #f1f5f9;
  --color-border: #334155;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.45);
}

[data-theme="dark"] .site-header.scrolled {
  box-shadow: var(--shadow-sm);
}

/* Dark header — invert logo to white */
[data-theme="dark"] .site-header .site-logo-img {
  filter: brightness(0) invert(1);
}

[data-theme="dark"] .nav-menu a:hover,
[data-theme="dark"] .nav-menu .current-menu-item > a,
[data-theme="dark"] .nav-menu .current_page_item > a,
[data-theme="dark"] .nav-menu .current-menu-ancestor > a {
  background: rgba(91, 159, 212, 0.12);
}

[data-theme="dark"] .tech-icon {
  background: rgba(91, 159, 212, 0.12);
}

[data-theme="dark"] .panel-icon,
[data-theme="dark"] .contact-service-icon {
  background: rgba(91, 159, 212, 0.12);
}

[data-theme="dark"] .contact-card-icon {
  background: var(--color-bg);
}

[data-theme="dark"] .product-gallery-frame,
[data-theme="dark"] .gallery-slide,
[data-theme="dark"] .gallery-slide img,
[data-theme="dark"] .product-gallery-img {
  background: var(--color-gallery-bg);
}

[data-theme="dark"] .product-gallery-frame {
  border-color: rgba(255, 255, 255, 0.08);
}

[data-theme="dark"] .gallery-nav {
  background: rgba(30, 41, 59, 0.95);
  color: var(--color-dark);
}

[data-theme="dark"] .gallery-nav:hover {
  background: var(--color-primary);
  color: #fff;
}

[data-theme="dark"] .form-group input,
[data-theme="dark"] .form-group textarea {
  background: var(--color-input-bg);
  color: var(--color-text);
}

[data-theme="dark"] .form-group input:focus,
[data-theme="dark"] .form-group textarea:focus {
  box-shadow: 0 0 0 3px rgba(91, 159, 212, 0.2);
}

[data-theme="dark"] .section-cta-banner .btn-primary {
  color: #0f172a;
}

[data-theme="dark"] .product-inquiry-box .btn-primary {
  color: #0f172a;
}

[data-theme="dark"] .ylhh-form-message.is-success {
  background: rgba(34, 197, 94, 0.12);
  border-color: rgba(34, 197, 94, 0.35);
  color: #86efac;
}

[data-theme="dark"] .ylhh-form-message.is-error {
  background: rgba(239, 68, 68, 0.12);
  border-color: rgba(239, 68, 68, 0.35);
  color: #fca5a5;
}

[data-theme="dark"] .page-technology .tech-data-table td::before,
[data-theme="dark"] .page-about .tech-data-table td::before {
  color: var(--color-text-light);
}

/* Theme toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg-alt);
  color: var(--color-text);
  cursor: pointer;
  transition: all var(--transition);
  flex-shrink: 0;
}

.theme-toggle:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.theme-toggle .ylhh-icon {
  width: 18px;
  height: 18px;
}

.theme-toggle.is-auto {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.theme-toggle__auto-dot {
  position: absolute;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  bottom: 4px;
  right: 4px;
}

.theme-toggle {
  position: relative;
}

html[data-theme="dark"] .theme-toggle__icon--sun,
html[data-theme="light"] .theme-toggle__icon--moon {
  display: none;
}

.theme-toggle__icon {
  display: flex;
  align-items: center;
  justify-content: center;
}

html:not([data-theme-mode="auto"]) .theme-toggle__auto-dot {
  display: none !important;
}