/* ===== MICRO-INTERACTIONS: ANIMATIONS ONLY ===== */
/* Version: 2.0 | Tailwind-first approach */

/* ========================================
   1. HOVER & FOCUS TRANSITIONS
   ======================================== */

a, button {
  transition: color 0.2s cubic-bezier(0.4, 0, 0.2, 1),
              opacity 0.2s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.15s cubic-bezier(0.4, 0, 0.2, 1),
              background-size 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

a {
  background-image: linear-gradient(currentColor, currentColor);
  background-repeat: no-repeat;
  background-position: 0 100%;
  background-size: 0% 2px;
  text-decoration: none;
}

a:hover {
  background-size: 100% 2px;
}

/* Enhanced focus (not well supported by Tailwind) */
a:focus-visible,
button:focus-visible {
  outline: 2px solid rgb(59 130 246);
  outline-offset: 4px;
  border-radius: 2px;
  opacity: 1;
}

.dark a:focus-visible,
.dark button:focus-visible {
  outline-color: rgb(96 165 250);
}

button:active {
  transform: translateY(1px);
}

/* Theme toggle rotation */
#theme-toggle {
  transition: transform 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

#theme-toggle:hover {
  transform: rotate(180deg);
}

/* ========================================
   2. LINK UNDERLINE ANIMATION
   ======================================== */

/* ========================================
   3. SCROLL PROGRESS (transform only)
   ======================================== */

.scroll-progress {
  transform: scaleX(0);
  transform-origin: 0%;
  will-change: transform;
}

/* ========================================
   4. BACK TO TOP (visibility only)
   ======================================== */

#back-to-top {
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

#back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
}

/* ========================================
   ACCESSIBILITY
   ======================================== */

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  html {
    scroll-behavior: auto;
  }
  
  .scroll-progress {
    display: none;
  }
}