/* ============================================
   PRELOADER / LOADING SCREEN
   ============================================ */

.preloader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-primary);
  z-index: var(--z-preloader);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.preloader.loaded {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.preloader-content {
  text-align: center;
}

/* Animated logo/initials */
.preloader-logo {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  margin-bottom: var(--space-6);
  position: relative;
  display: inline-block;
}

.preloader-logo::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--color-primary);
  transform: scaleX(0);
  animation: preloaderLine 1.5s ease-in-out infinite;
}

@keyframes preloaderLine {
  0%, 100% {
    transform: scaleX(0);
    transform-origin: left;
  }
  50% {
    transform: scaleX(1);
    transform-origin: left;
  }
  51% {
    transform-origin: right;
  }
}

/* Spinner */
.preloader-spinner {
  width: 60px;
  height: 60px;
  position: relative;
  margin: 0 auto var(--space-5);
}

.preloader-spinner::before,
.preloader-spinner::after {
  content: '';
  position: absolute;
  border-radius: 50%;
}

.preloader-spinner::before {
  width: 100%;
  height: 100%;
  border: 3px solid var(--border-color);
  border-top-color: var(--color-primary);
  animation: preloaderSpin 1s linear infinite;
}

.preloader-spinner::after {
  width: 60%;
  height: 60%;
  top: 20%;
  left: 20%;
  border: 3px solid var(--border-color);
  border-bottom-color: var(--color-primary-light);
  animation: preloaderSpin 0.8s linear infinite reverse;
}

@keyframes preloaderSpin {
  100% {
    transform: rotate(360deg);
  }
}

/* Loading text */
.preloader-text {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
}

.preloader-text span {
  display: inline-block;
  animation: preloaderBounce 1s ease-in-out infinite;
}

.preloader-text span:nth-child(1) { animation-delay: 0s; }
.preloader-text span:nth-child(2) { animation-delay: 0.1s; }
.preloader-text span:nth-child(3) { animation-delay: 0.2s; }
.preloader-text span:nth-child(4) { animation-delay: 0.3s; }
.preloader-text span:nth-child(5) { animation-delay: 0.4s; }
.preloader-text span:nth-child(6) { animation-delay: 0.5s; }
.preloader-text span:nth-child(7) { animation-delay: 0.6s; }

@keyframes preloaderBounce {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-5px);
    color: var(--color-primary);
  }
}

/* Progress bar variant */
.preloader-progress {
  width: 200px;
  height: 4px;
  background: var(--border-color);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-top: var(--space-5);
}

.preloader-progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
  border-radius: var(--radius-full);
  transition: width 0.3s ease;
}

/* ============================================
   SMOOTH SCROLL BEHAVIOR
   ============================================ */

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px; /* Account for fixed navbar */
}

/* For browsers that support scroll-timeline */
@supports (animation-timeline: scroll()) {
  html {
    scroll-timeline: --page-scroll block;
  }
}

/* ============================================
   PAGE TRANSITION EFFECTS
   ============================================ */

.page-transition {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: calc(var(--z-preloader) - 1);
  pointer-events: none;
  display: flex;
}

.page-transition-panel {
  flex: 1;
  background: var(--color-primary);
  transform: scaleY(0);
  transform-origin: bottom;
}

.page-transition.active .page-transition-panel {
  animation: pageTransitionIn 0.5s cubic-bezier(0.65, 0, 0.35, 1) forwards;
}

.page-transition.active.out .page-transition-panel {
  animation: pageTransitionOut 0.5s cubic-bezier(0.65, 0, 0.35, 1) forwards;
  transform-origin: top;
}

.page-transition-panel:nth-child(1) { animation-delay: 0s; }
.page-transition-panel:nth-child(2) { animation-delay: 0.05s; }
.page-transition-panel:nth-child(3) { animation-delay: 0.1s; }
.page-transition-panel:nth-child(4) { animation-delay: 0.15s; }
.page-transition-panel:nth-child(5) { animation-delay: 0.2s; }

@keyframes pageTransitionIn {
  0% {
    transform: scaleY(0);
  }
  100% {
    transform: scaleY(1);
  }
}

@keyframes pageTransitionOut {
  0% {
    transform: scaleY(1);
  }
  100% {
    transform: scaleY(0);
  }
}

/* ============================================
   ENHANCED SCROLL PROGRESS BAR
   ============================================ */

.scroll-progress-enhanced {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  z-index: var(--z-sticky);
  background: var(--border-color-light);
}

.scroll-progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg,
    var(--color-primary),
    var(--color-primary-light),
    var(--color-accent)
  );
  background-size: 200% 100%;
  animation: scrollProgressGradient 3s ease infinite;
  transition: width 0.1s ease;
  position: relative;
}

.scroll-progress-bar::after {
  content: '';
  position: absolute;
  right: 0;
  top: 0;
  width: 100px;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4));
  animation: scrollProgressShine 2s ease-in-out infinite;
}

@keyframes scrollProgressGradient {
  0%, 100% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
}

@keyframes scrollProgressShine {
  0%, 100% {
    opacity: 0;
    transform: translateX(-100%);
  }
  50% {
    opacity: 1;
    transform: translateX(100%);
  }
}

/* ============================================
   GLOBAL MICRO-INTERACTIONS
   ============================================ */

/* Universal link hover effect */
a:not(.btn):not(.nav-link):not(.social-icon-bounce):not(.footer-social-link) {
  position: relative;
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:not(.btn):not(.nav-link):not(.social-icon-bounce):not(.footer-social-link)::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-primary);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition-base);
}

a:not(.btn):not(.nav-link):not(.social-icon-bounce):not(.footer-social-link):hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* Universal button micro-interactions */
.btn {
  position: relative;
  overflow: hidden;
  transition: all var(--transition-base);
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.6s ease, height 0.6s ease;
}

.btn:hover::before {
  width: 300px;
  height: 300px;
}

.btn:active {
  transform: scale(0.98);
}

/* Card hover lift effect */
.card,
.card-service,
.contact-card-flip,
.skill-badge {
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.card:hover,
.card-service:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

/* Image hover zoom */
.img-place img {
  transition: transform var(--transition-slow);
}

.img-place:hover img {
  transform: scale(1.05);
}

/* Icon bounce on hover */
.icon-bounce {
  transition: transform var(--transition-bounce);
}

.icon-bounce:hover {
  transform: translateY(-3px);
}

/* Focus states for accessibility */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

/* Selection styling */
::selection {
  background: var(--color-primary);
  color: var(--text-inverse);
}

::-moz-selection {
  background: var(--color-primary);
  color: var(--text-inverse);
}

/* ============================================
   ENHANCED TYPOGRAPHY
   ============================================ */

body {
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, .h1 {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
}

h2, .h2 {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
}

h3, .h3 {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
}

h4, .h4 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
}

h5, .h5 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
}

h6, .h6 {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-medium);
}

.lead {
  font-size: var(--font-size-lg);
  line-height: var(--line-height-relaxed);
}

.small, small {
  font-size: var(--font-size-sm);
}

.text-xs {
  font-size: var(--font-size-xs);
}

/* ============================================
   PERFORMANCE OPTIMIZATIONS
   ============================================ */

/* GPU acceleration for animations */
.cursor-follower,
.cursor-dot,
.preloader,
.page-transition,
.back-to-top,
.floating-shapes .shape,
.about-blob {
  will-change: transform;
}

/* Reduce motion for accessibility */
@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;
  }

  .preloader {
    display: none !important;
  }

  .cursor-follower,
  .cursor-dot {
    display: none !important;
  }
}

/* Lazy loading placeholder */
.lazy-placeholder {
  background: linear-gradient(
    90deg,
    var(--bg-tertiary) 0%,
    var(--bg-secondary) 50%,
    var(--bg-tertiary) 100%
  );
  background-size: 200% 100%;
  animation: lazyShimmer 1.5s ease-in-out infinite;
}

@keyframes lazyShimmer {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

/* Content visibility for performance */
.vg-page:not(#home) {
  content-visibility: auto;
  contain-intrinsic-size: 0 500px;
}

/* ============================================
   RESPONSIVE ADJUSTMENTS FOR GLOBAL STYLES
   ============================================ */

@media (max-width: 991.98px) {
  :root {
    --font-size-4xl: 3rem;
    --font-size-3xl: 2.5rem;
    --font-size-2xl: 2rem;
  }

  .theme-toggle {
    top: auto;
    bottom: 80px;
    right: 15px;
    width: 45px;
    height: 45px;
  }
}

@media (max-width: 767.98px) {
  :root {
    --font-size-4xl: 2.5rem;
    --font-size-3xl: 2rem;
    --font-size-2xl: 1.75rem;
    --font-size-xl: 1.5rem;
  }

  html {
    scroll-padding-top: 60px;
  }

  .preloader-logo {
    font-size: var(--font-size-3xl);
  }
}

@media (max-width: 575.98px) {
  :root {
    --font-size-4xl: 2rem;
    --font-size-3xl: 1.75rem;
    --font-size-2xl: 1.5rem;
  }

  .theme-toggle {
    width: 40px;
    height: 40px;
    bottom: 70px;
  }

  .theme-toggle .icon-sun,
  .theme-toggle .icon-moon {
    font-size: 1.2rem;
  }
}

/* ============================================
   END GLOBAL STYLES
   ============================================ */