/* Светлая тема — переключается через data-sd-theme на <html> */

html[data-sd-theme="light"] {
  color-scheme: light;
  --sd-bg: #f3f5f9;
  --sd-bg-elevated: #ffffff;
  --sd-surface: rgba(255, 255, 255, 0.88);
  --sd-border: rgba(15, 23, 42, 0.12);
  --sd-border-strong: rgba(15, 23, 42, 0.22);
  --sd-text: #1a1f36;
  --sd-text-muted: #4a5568;
  --sd-accent: #00a88f;
  --sd-accent-2: #6d3fe0;
  --sd-shadow: 0 12px 40px rgba(15, 23, 42, 0.08);
  --sd-header-scrolled-bg: rgba(255, 255, 255, 0.94);
  --sd-mobile-nav-bg: rgba(255, 255, 255, 0.98);
  --sd-nav-hover-bg: rgba(15, 23, 42, 0.05);
  --sd-cursor-core: #00a88f;
  --sd-cursor-ring: rgba(0, 168, 143, 0.65);
}

html[data-sd-theme="light"] .sd-cursor__core {
  border-color: var(--sd-cursor-core, #00a88f);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.9), 0 0 12px var(--sd-cursor-core, #00a88f);
}

html[data-sd-theme="dark"],
html:not([data-sd-theme]) {
  color-scheme: dark;
  --sd-header-scrolled-bg: rgba(11, 13, 18, 0.92);
  --sd-mobile-nav-bg: rgba(11, 13, 18, 0.97);
  --sd-nav-hover-bg: rgba(255, 255, 255, 0.06);
  --sd-cursor-core: #00e5c0;
  --sd-cursor-ring: rgba(0, 229, 192, 0.7);
}

html[data-sd-theme="light"] body.sd-has-shell::before {
  background:
    radial-gradient(ellipse 80% 50% at 20% -10%, rgba(0, 168, 143, 0.1), transparent),
    radial-gradient(ellipse 60% 40% at 90% 10%, rgba(109, 63, 224, 0.08), transparent),
    var(--sd-bg);
}

/* Главная: тёмные градиенты → светлая палитра */
html[data-sd-theme="light"] .sd-svc-funnel::before {
  opacity: 0.2;
}

html[data-sd-theme="light"] .sd-hero-full__layer--back {
  background:
    radial-gradient(ellipse 90% 70% at 15% 20%, rgba(0, 168, 143, 0.14), transparent 55%),
    radial-gradient(ellipse 70% 60% at 85% 75%, rgba(109, 63, 224, 0.1), transparent 50%),
    var(--sd-bg);
}

html[data-sd-theme="light"] .sd-svc-sites a {
  background: var(--sd-nav-hover-bg);
}

/* Кнопка переключения темы в шапке */
.sd-theme-toggle {
  flex-shrink: 0;
  display: grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  margin: 0;
  border: 1px solid var(--sd-border);
  border-radius: 0.65rem;
  background: transparent;
  color: var(--sd-text);
  transition: border-color 0.25s var(--sd-ease), background 0.25s var(--sd-ease), transform 0.35s var(--sd-ease);
}

.sd-theme-toggle:hover {
  border-color: var(--sd-accent);
  background: var(--sd-nav-hover-bg);
}

.sd-theme-toggle:active {
  transform: scale(0.94);
}

.sd-theme-toggle__icon {
  width: 1.35rem;
  height: 1.35rem;
  position: relative;
}

.sd-theme-toggle__sun,
.sd-theme-toggle__moon {
  position: absolute;
  inset: 0;
  transition: opacity 0.35s var(--sd-ease), transform 0.45s var(--sd-ease);
}

.sd-theme-toggle__sun {
  opacity: 0;
  transform: rotate(-90deg) scale(0.5);
}

.sd-theme-toggle__moon {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

html[data-sd-theme="light"] .sd-theme-toggle__sun {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

html[data-sd-theme="light"] .sd-theme-toggle__moon {
  opacity: 0;
  transform: rotate(90deg) scale(0.5);
}

.sd-header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

@media (max-width: 960px) {
  .sd-nav-toggle {
    display: block;
    margin-left: auto;
  }

  .sd-header-actions {
    margin-left: 0.35rem;
  }
}
