/* Index page: preloader, hero particles, scroll animations */

.preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease-in-out, visibility 0.5s ease-in-out;
}

body.dark-mode .preloader {
    background-color: #222;
}

.preloader.fade-out {
    opacity: 0;
    visibility: hidden;
}

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

.preloader-logo {
    width: 120px;
    height: 120px;
    margin-bottom: 20px;
}

.preloader-path {
    stroke-dasharray: 1500;
    stroke-dashoffset: 1500;
    animation: preloaderDraw 2s ease forwards;
}

@keyframes preloaderDraw {
    to {
        stroke-dashoffset: 0;
    }
}

.preloader p {
    font-size: 16px;
    color: var(--primary-color);
    letter-spacing: 2px;
    margin-top: 20px;
    font-weight: 500;
    opacity: 0;
    animation: fadeIn 0.5s ease 1.5s forwards;
}

@keyframes fadeIn {
    to {
        opacity: 1;
    }
}

/* Page transitions */
.page-transition {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--primary-color);
    transform: translateY(100%);
    z-index: 9990;
    pointer-events: none;
    opacity: 0.9;
}

.page-transition.active {
    animation: pageTransition 1s cubic-bezier(0.77, 0, 0.175, 1) forwards;
}

@keyframes pageTransition {
    0% {
        transform: translateY(100%);
    }
    100% {
        transform: translateY(0);
    }
}

/* Enhanced animations */
.fade-up {
    /* Progressive enhancement: content stays visible if JS doesn't run */
    opacity: 1;
    transform: none;
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

/* Keep opacity at 1 so Safari / slow IO never leaves sections invisible */
.js-enhanced .fade-up {
    opacity: 1;
    transform: translateY(30px);
}

.js-enhanced .fade-up.active {
    opacity: 1;
    transform: translateY(0);
}

/* Hero must stay visible on all browsers if observers lag */
#home .hero-content.fade-up,
.js-enhanced #home .hero-content.fade-up {
    opacity: 1;
    transform: none;
}

/* Mobile: do not hide below-the-fold blocks until observed (Safari IO quirks) */
@media (max-width: 1024px), (hover: none) and (pointer: coarse) {
    .js-enhanced .fade-up {
        opacity: 1;
        transform: none;
    }

    .js-enhanced .fade-up.active {
        opacity: 1;
        transform: none;
    }
}

.stagger-item {
    opacity: 1;
    transform: translateY(30px);
}

.js-enhanced .stagger-item {
    opacity: 1;
}

.stagger-item.active {
    transform: translateY(0);
    transition: transform 0.5s ease;
}

.js-enhanced .stagger-item.active {
    animation: staggerSlide 0.5s ease forwards;
}

@keyframes staggerSlide {
    from {
        transform: translateY(30px);
    }
    to {
        transform: translateY(0);
    }
}

/* Enhanced card animations */
.enhanced-card {
    position: relative;
    overflow: hidden;
    transition: transform 0.5s cubic-bezier(0.165, 0.84, 0.44, 1), 
                box-shadow 0.5s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.enhanced-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 50%);
    opacity: 0;
    transition: opacity 0.5s ease;
    z-index: 2;
    pointer-events: none;
}

.enhanced-card::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, rgba(255, 69, 0, 0), rgba(255, 69, 0, 0.1), rgba(255, 69, 0, 0));
    transform: rotate(30deg);
    transition: transform 0.7s ease-in-out;
    z-index: 1;
    pointer-events: none;
}

.enhanced-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 15px 30px rgba(0,0,0,0.15);
}

.enhanced-card:hover::before {
    opacity: 1;
}

.enhanced-card:hover::after {
    transform: rotate(30deg) translate(50%, 50%);
}

/* Button animation */
.animated-btn {
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
    z-index: 1;
}

.animated-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.7s ease;
    z-index: -1;
}

.animated-btn:hover::before {
    left: 100%;
}

.animated-btn::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: -100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
    transition: left 0.7s ease;
    z-index: -1;
    transition-delay: 0.2s;
}

.animated-btn:hover::after {
    left: 100%;
}

/* Floating animation */
.floating {
    animation: floating 3s ease-in-out infinite;
}

@keyframes floating {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

/* Reveal border animation */
.reveal-border {
    position: relative;
}

.reveal-border::before,
.reveal-border::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width 0.4s ease;
}

.reveal-border::before {
    top: 0;
    left: 0;
}

.reveal-border::after {
    bottom: 0;
    right: 0;
}

.reveal-border:hover::before,
.reveal-border:hover::after {
    width: 100%;
}

/* Text reveal animation */
.text-reveal {
    position: relative;
    display: inline-block;
    overflow: hidden;
}

.text-reveal span {
    display: block;
    transform: translateY(100%);
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.text-reveal.active span {
    transform: translateY(0);
}

/* 3D Card Tilt Effect */
.tilt-card {
    transition: transform 0.6s cubic-bezier(0.23, 1, 0.32, 1);
    transform-style: preserve-3d;
}

.tilt-card:hover {
    transform: perspective(1000px) rotateX(5deg) rotateY(5deg);
}

.tilt-card::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    background: linear-gradient(135deg, 
                rgba(255, 255, 255, 0.2) 0%, 
                rgba(255, 255, 255, 0) 60%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.tilt-card:hover::before {
    opacity: 1;
}

/* Layered shadow effect */
.shadow-card {
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s cubic-bezier(0.215, 0.61, 0.355, 1);
}

.shadow-card:hover {
    box-shadow: 
        0 5px 15px rgba(0, 0, 0, 0.05),
        0 15px 35px rgba(0, 0, 0, 0.1),
        0 30px 60px rgba(0, 0, 0, 0.1);
}

/* Hero section enhancements */
.hero-enhanced {
    position: relative;
    overflow: hidden;
}

.hero-enhanced::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, 
                rgba(0, 0, 0, 0.4) 0%, 
                rgba(0, 0, 0, 0.7) 100%);
    z-index: 1;
}

.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 0;
}

.particle {
    position: absolute;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.4);
    pointer-events: none;
    z-index: 0;
}

/* Hero cyber / glitch (background = plexus image only, see enhancements.css) */
.hero-cyber {
    isolation: isolate;
}

.hero-cyber-tagline.typewriter-done,
.hero-cyber-tagline:not(:empty) {
    animation: hero-tagline-flicker 4s infinite;
}

@keyframes hero-tagline-flicker {
    0%, 96%, 100% { opacity: 0.95; }
    97% { opacity: 0.7; }
    98% { opacity: 1; }
    99% { opacity: 0.85; }
}

.hero-cyber .hero-buttons .btn-primary {
    box-shadow:
        0 0 20px rgba(0, 255, 220, 0.25),
        0 4px 15px rgba(13, 110, 253, 0.35);
}

.hero-cyber .hero-buttons .btn-outline {
    border-color: rgba(0, 255, 220, 0.55);
    color: #e8fffc;
    text-shadow: 0 0 8px rgba(0, 255, 220, 0.35);
}

.hero-cyber .hero-buttons .btn-outline:hover {
    background: rgba(0, 255, 220, 0.12);
    box-shadow: 0 0 18px rgba(0, 255, 220, 0.3);
}

@media (prefers-reduced-motion: reduce) {
  .preloader-path {
    animation: none;
    stroke-dashoffset: 0;
  }
  .preloader p {
    animation: none;
    opacity: 1;
  }
  .floating,
  .particle {
    animation: none !important;
  }
  .fade-up,
  .stagger-item {
    opacity: 1;
    transform: none;
  }
  .hero-cyber-tagline {
    animation: none !important;
  }
}