/* ============================================
   Scroll Reveal Animations
   ============================================ */

/* Base hidden state for scroll reveal */
[data-reveal] {
  opacity: 0;
  transition: opacity 0.8s ease, transform 0.8s ease;
  will-change: opacity, transform;
}

[data-reveal="fade-up"] {
  transform: translateY(40px);
}

[data-reveal="fade-down"] {
  transform: translateY(-40px);
}

[data-reveal="fade-left"] {
  transform: translateX(40px);
}

[data-reveal="fade-right"] {
  transform: translateX(-40px);
}

[data-reveal="scale"] {
  transform: scale(0.92);
}

[data-reveal="fade"] {
  transform: none;
}

/* Revealed state */
[data-reveal].revealed {
  opacity: 1;
  transform: none;
}

/* Stagger children */
[data-reveal-stagger] > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

[data-reveal-stagger].revealed > * {
  opacity: 1;
  transform: none;
}

[data-reveal-stagger].revealed > *:nth-child(1) { transition-delay: 0.05s; }
[data-reveal-stagger].revealed > *:nth-child(2) { transition-delay: 0.1s; }
[data-reveal-stagger].revealed > *:nth-child(3) { transition-delay: 0.15s; }
[data-reveal-stagger].revealed > *:nth-child(4) { transition-delay: 0.2s; }
[data-reveal-stagger].revealed > *:nth-child(5) { transition-delay: 0.25s; }
[data-reveal-stagger].revealed > *:nth-child(6) { transition-delay: 0.3s; }
[data-reveal-stagger].revealed > *:nth-child(7) { transition-delay: 0.35s; }
[data-reveal-stagger].revealed > *:nth-child(8) { transition-delay: 0.4s; }

/* Delay variants */
[data-reveal-delay="100"] { transition-delay: 0.1s; }
[data-reveal-delay="200"] { transition-delay: 0.2s; }
[data-reveal-delay="300"] { transition-delay: 0.3s; }
[data-reveal-delay="400"] { transition-delay: 0.4s; }
[data-reveal-delay="500"] { transition-delay: 0.5s; }
[data-reveal-delay="600"] { transition-delay: 0.6s; }

/* ============================================
   Navbar Animation
   ============================================ */
.navbar {
  transition: background var(--transition-base),
              backdrop-filter var(--transition-base),
              box-shadow var(--transition-base),
              border-color var(--transition-base);
}

/* ============================================
   Hero Animations
   ============================================ */
.hero-content > * {
  opacity: 0;
  transform: translateY(20px);
  animation: hero-fade-in 0.6s ease forwards;
}

.hero-content > *:nth-child(1) { animation-delay: 0.1s; }
.hero-content > *:nth-child(2) { animation-delay: 0.2s; }
.hero-content > *:nth-child(3) { animation-delay: 0.3s; }
.hero-content > *:nth-child(4) { animation-delay: 0.4s; }
.hero-content > *:nth-child(5) { animation-delay: 0.5s; }
.hero-content > *:nth-child(6) { animation-delay: 0.6s; }
.hero-content > *:nth-child(7) { animation-delay: 0.7s; }
.hero-content > *:nth-child(8) { animation-delay: 0.8s; }

@keyframes hero-fade-in {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-visual {
  opacity: 0;
  animation: hero-visual-in 0.8s ease 0.4s forwards;
}

@keyframes hero-visual-in {
  to {
    opacity: 1;
  }
}

/* Background shapes gentle drift */
.hero-bg-shape--1 {
  animation: shape-drift-1 20s ease-in-out infinite;
}

.hero-bg-shape--2 {
  animation: shape-drift-2 25s ease-in-out infinite;
}

.hero-bg-shape--3 {
  animation: shape-drift-3 18s ease-in-out infinite;
}

@keyframes shape-drift-1 {
  0%, 100% { transform: translate(0, 0); }
  33% { transform: translate(-30px, 20px); }
  66% { transform: translate(20px, -15px); }
}

@keyframes shape-drift-2 {
  0%, 100% { transform: translate(0, 0); }
  33% { transform: translate(25px, -25px); }
  66% { transform: translate(-20px, 15px); }
}

@keyframes shape-drift-3 {
  0%, 100% { transform: translate(-50%, -50%); }
  33% { transform: translate(calc(-50% + 20px), calc(-50% - 20px)); }
  66% { transform: translate(calc(-50% - 15px), calc(-50% + 15px)); }
}

/* ============================================
   Card Hover Micro-animations
   ============================================ */
.skill-category,
.service-card,
.process-card,
.stat-card,
.about-info-card,
.contact-item,
.timeline-card {
  transition: transform var(--transition-base),
              box-shadow var(--transition-base),
              border-color var(--transition-base);
}

/* ============================================
   Button Shine Effect
   ============================================ */
.btn--primary::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(
    45deg,
    transparent 30%,
    rgba(255, 255, 255, 0.1) 50%,
    transparent 70%
  );
  transform: rotate(45deg) translateX(-100%);
  transition: transform 0.6s ease;
}

.btn--primary:hover::after {
  transform: rotate(45deg) translateX(100%);
}

/* ============================================
   Project Card Image Overlay
   ============================================ */
.project-card-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.2), transparent 50%);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.project-card:hover .project-card-image::after {
  opacity: 1;
}

/* ============================================
   Filter Transition
   ============================================ */
.project-card {
  transition: transform var(--transition-base),
              box-shadow var(--transition-base),
              border-color var(--transition-base),
              opacity var(--transition-base);
}

.project-card.hiding {
  opacity: 0;
  transform: scale(0.9);
  pointer-events: none;
}

.project-card.showing {
  opacity: 1;
  transform: scale(1);
}

/* ============================================
   Counter Animation
   ============================================ */
.stat-number {
  transition: none;
}

/* ============================================
   Theme Transition
   ============================================ */
*,
*::before,
*::after {
  transition-property: background-color, border-color, color, box-shadow;
  transition-duration: 0s;
}

body.theme-transitioning,
body.theme-transitioning *,
body.theme-transitioning *::before,
body.theme-transitioning *::after {
  transition-property: background-color, border-color, color, box-shadow;
  transition-duration: 0.4s !important;
  transition-timing-function: ease !important;
}

/* ============================================
   Focus ring animation
   ============================================ */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  transition: outline-offset var(--transition-fast);
}

/* ============================================
   Reduced Motion
   ============================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }

  [data-reveal-stagger] > * {
    opacity: 1 !important;
    transform: none !important;
  }

  .hero-content > * {
    opacity: 1 !important;
    transform: none !important;
  }

  .hero-visual {
    opacity: 1 !important;
  }
}