/* ==========================================================================
   THEME — Theme toggle morphing animation
   ========================================================================== */

.theme-toggle {
  position: relative;
  width: 52px;
  height: 28px;
  border-radius: var(--radius-full);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  cursor: pointer;
  overflow: hidden;
  transition: border-color var(--duration-fast) ease;
}

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

.theme-toggle__track {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 6px;
}

.theme-toggle__icon {
  width: 14px;
  height: 14px;
  color: var(--color-text-subtle);
  transition: color var(--duration-fast) ease,
              transform var(--duration-normal) var(--ease-out-expo);
}

.theme-toggle__icon--sun {
  color: var(--color-accent);
}

[data-theme="light"] .theme-toggle__icon--sun {
  color: var(--color-text-subtle);
}

[data-theme="light"] .theme-toggle__icon--moon {
  color: var(--color-accent);
}

.theme-toggle__thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
  box-shadow: var(--shadow-sm);
  transition: transform var(--duration-normal) var(--ease-out-expo);
}

[data-theme="light"] .theme-toggle__thumb {
  transform: translateX(24px);
}

/* Theme transition overlay for morph effect */
.theme-transition-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  background: var(--color-bg);
  clip-path: circle(0% at var(--x, 50%) var(--y, 50%));
  transition: clip-path 0.6s var(--ease-in-out-expo);
}

.theme-transition-overlay.is-active {
  clip-path: circle(150% at var(--x, 50%) var(--y, 50%));
}

/* Smooth color transitions on theme change */
body,
.navbar,
.glass,
.btn--secondary,
.services__panel,
.services__accordion-item,
.process-step,
.faq-item,
.client-logo,
.project-card,
.testimonial-card,
.footer {
  transition: background-color var(--duration-slow) var(--ease-out-expo),
              border-color var(--duration-slow) var(--ease-out-expo),
              color var(--duration-slow) var(--ease-out-expo),
              box-shadow var(--duration-slow) var(--ease-out-expo);
}