/* ============================================
   VHASS - Animations Stylesheet
   Scroll reveals, micro-interactions, transitions
   ============================================ */

/* ============================================
   REVEAL ANIMATIONS
   ============================================ */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Staggered reveal delays */
.reveal:nth-child(1) { transition-delay: 0.1s; }
.reveal:nth-child(2) { transition-delay: 0.2s; }
.reveal:nth-child(3) { transition-delay: 0.3s; }
.reveal:nth-child(4) { transition-delay: 0.4s; }
.reveal:nth-child(5) { transition-delay: 0.5s; }
.reveal:nth-child(6) { transition-delay: 0.6s; }

/* ============================================
   FADE IN ANIMATION
   ============================================ */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.6s ease-out forwards;
}

/* ============================================
   SLIDE IN ANIMATIONS
   ============================================ */
@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.slide-in-left {
    animation: slideInLeft 0.6s ease-out forwards;
}

.slide-in-right {
    animation: slideInRight 0.6s ease-out forwards;
}

.slide-in-up {
    animation: slideInUp 0.6s ease-out forwards;
}

/* ============================================
   SCALE ANIMATIONS
   ============================================ */
@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.scale-in {
    animation: scaleIn 0.5s ease-out forwards;
}

/* ============================================
   PULSE ANIMATION
   ============================================ */
@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.pulse {
    animation: pulse 2s ease-in-out infinite;
}

/* ============================================
   BOUNCE ANIMATION
   ============================================ */
@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.bounce {
    animation: bounce 1s ease-in-out infinite;
}

/* ============================================
   ROTATE ANIMATION
   ============================================ */
@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.rotate {
    animation: rotate 2s linear infinite;
}

/* ============================================
   SHIMMER EFFECT
   ============================================ */
@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

.shimmer {
    background: linear-gradient(
        90deg,
        rgba(255, 255, 255, 0) 0%,
        rgba(255, 255, 255, 0.3) 50%,
        rgba(255, 255, 255, 0) 100%
    );
    background-size: 1000px 100%;
    animation: shimmer 2s infinite;
}

/* ============================================
   LOADING SPINNER
   ============================================ */
@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(0, 113, 206, 0.2);
    border-top-color: #0071CE;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* ============================================
   HOVER EFFECTS
   ============================================ */

/* Lift on hover */
.hover-lift {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

/* Grow on hover */
.hover-grow {
    transition: transform 0.3s ease;
}

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

/* Glow on hover */
.hover-glow {
    transition: box-shadow 0.3s ease;
}

.hover-glow:hover {
    box-shadow: 0 0 20px rgba(0, 113, 206, 0.4);
}

/* Underline effect */
.hover-underline {
    position: relative;
}

.hover-underline::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background-color: currentColor;
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.hover-underline:hover::after {
    transform: scaleX(1);
}

/* ============================================
   TRANSITION UTILITIES
   ============================================ */
.transition-fast {
    transition: all 0.15s ease;
}

.transition-base {
    transition: all 0.25s ease;
}

.transition-slow {
    transition: all 0.35s ease;
}

/* ============================================
   PARALLAX EFFECT
   ============================================ */
.parallax {
    transform: translateZ(0);
    will-change: transform;
}

/* ============================================
   SMOOTH SCROLL BEHAVIOR
   ============================================ */
html {
    scroll-behavior: smooth;
}

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

/* ============================================
   PAGE TRANSITION
   ============================================ */
.page-transition {
    animation: fadeIn 0.5s ease-out;
}

/* ============================================
   MOBILE MENU ANIMATION
   ============================================ */
.nav-menu {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
}

.nav-menu.active {
    max-height: 600px;
    transition: max-height 0.5s ease-in;
}

/* ============================================
   IMAGE LAZY LOAD EFFECT
   ============================================ */
.lazy-image {
    opacity: 0;
    transition: opacity 0.5s ease-in;
}

.lazy-image.loaded {
    opacity: 1;
}

/* ============================================
   SKELETON LOADING
   ============================================ */
@keyframes skeleton {
    0% {
        background-position: -200px 0;
    }
    100% {
        background-position: calc(200px + 100%) 0;
    }
}

.skeleton {
    background-color: #E0E0E0;
    background-image: linear-gradient(
        90deg,
        #E0E0E0 0px,
        #F5F5F5 40px,
        #E0E0E0 80px
    );
    background-size: 200px 100%;
    background-repeat: no-repeat;
    animation: skeleton 1.2s ease-in-out infinite;
}

/* ============================================
   TYPING ANIMATION
   ============================================ */
@keyframes typing {
    from {
        width: 0;
    }
    to {
        width: 100%;
    }
}

@keyframes blink {
    50% {
        border-color: transparent;
    }
}

.typing-animation {
    overflow: hidden;
    border-right: 2px solid;
    white-space: nowrap;
    animation: typing 3s steps(40, end), blink 0.75s step-end infinite;
}

/* ============================================
   GRADIENT ANIMATION
   ============================================ */
@keyframes gradientShift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

.gradient-animate {
    background-size: 200% 200%;
    animation: gradientShift 5s ease infinite;
}

/* ============================================
   BLUR FADE IN
   ============================================ */
@keyframes blurFadeIn {
    from {
        opacity: 0;
        filter: blur(10px);
    }
    to {
        opacity: 1;
        filter: blur(0);
    }
}

.blur-fade-in {
    animation: blurFadeIn 0.8s ease-out forwards;
}

/* ============================================
   CUSTOM SCROLLBAR ANIMATION
   ============================================ */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: #F5F5F5;
}

::-webkit-scrollbar-thumb {
    background: #BDBDBD;
    border-radius: 5px;
    transition: background 0.3s ease;
}

::-webkit-scrollbar-thumb:hover {
    background: #0071CE;
}

/* ============================================
   FOCUS VISIBLE ANIMATION
   ============================================ */
*:focus-visible {
    outline: 2px solid #0071CE;
    outline-offset: 2px;
    transition: outline-offset 0.2s ease;
}

/* ============================================
   STAGGER ANIMATION UTILITIES
   ============================================ */
.stagger-1 { animation-delay: 0.1s; }
.stagger-2 { animation-delay: 0.2s; }
.stagger-3 { animation-delay: 0.3s; }
.stagger-4 { animation-delay: 0.4s; }
.stagger-5 { animation-delay: 0.5s; }
.stagger-6 { animation-delay: 0.6s; }