/* ==========================================================================
   Animations - Elysoft Cyberpunk Theme
   ========================================================================== */

/* ==========================================================================
   Scroll-triggered entrance animations
   ========================================================================== */

.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-left {
    opacity: 0;
    transform: translateX(-40px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.fade-right {
    opacity: 0;
    transform: translateX(40px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-right.visible {
    opacity: 1;
    transform: translateX(0);
}

.scale-in {
    opacity: 0;
    transform: scale(0.9);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.scale-in.visible {
    opacity: 1;
    transform: scale(1);
}

/* Staggered children */
.stagger > *:nth-child(1) { transition-delay: 0ms; }
.stagger > *:nth-child(2) { transition-delay: 100ms; }
.stagger > *:nth-child(3) { transition-delay: 200ms; }
.stagger > *:nth-child(4) { transition-delay: 300ms; }
.stagger > *:nth-child(5) { transition-delay: 400ms; }
.stagger > *:nth-child(6) { transition-delay: 500ms; }

/* ==========================================================================
   Keyframe animations
   ========================================================================== */

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.5); }
}

@keyframes glow-breathe {
    0%, 100% { box-shadow: 0 0 10px rgba(0, 212, 255, 0.2); }
    50% { box-shadow: 0 0 25px rgba(0, 212, 255, 0.4), 0 0 50px rgba(0, 212, 255, 0.1); }
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-12px); }
}

@keyframes float-slow {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-8px); }
}

@keyframes gradient-shift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes rotate-slow {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

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

@keyframes border-glow {
    0%, 100% {
        border-color: rgba(0, 212, 255, 0.2);
        box-shadow: 0 0 8px rgba(0, 212, 255, 0.1);
    }
    50% {
        border-color: rgba(0, 212, 255, 0.5);
        box-shadow: 0 0 20px rgba(0, 212, 255, 0.2), 0 0 40px rgba(0, 212, 255, 0.05);
    }
}

@keyframes fade-in-up {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes kanji-float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
        opacity: 0.15;
    }
    25% {
        opacity: 0.25;
    }
    50% {
        transform: translateY(-20px) rotate(3deg);
        opacity: 0.2;
    }
    75% {
        opacity: 0.15;
    }
}

/* ==========================================================================
   Utility animation classes
   ========================================================================== */

.gradient-text {
    background: linear-gradient(135deg, var(--neon-blue), var(--neon-purple), var(--neon-orange));
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradient-shift 4s ease infinite;
}

.gradient-text--blue-purple {
    background: linear-gradient(135deg, var(--neon-blue), var(--neon-purple));
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradient-shift 4s ease infinite;
}

.float-animation {
    animation: float 3s ease-in-out infinite;
}

.float-animation--slow {
    animation: float-slow 4s ease-in-out infinite;
}

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

.border-glow {
    animation: border-glow 3s ease-in-out infinite;
}

.neon-line {
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--neon-blue), var(--neon-purple), transparent);
    border: none;
    margin: var(--space-3xl) 0;
    opacity: 0.4;
}

/* Tilt effect on hover */
.tilt-card {
    transition: transform var(--transition-base);
    transform-style: preserve-3d;
}

.tilt-card:hover {
    transform: perspective(1000px) rotateX(2deg) rotateY(-2deg) translateY(-4px);
}

/* Shimmer loading effect */
.shimmer {
    background: linear-gradient(
        90deg,
        var(--bg-tertiary) 25%,
        var(--bg-surface) 50%,
        var(--bg-tertiary) 75%
    );
    background-size: 200% 100%;
    animation: shimmer 2s infinite;
}

/* Kanji floating background */
.kanji-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
    z-index: 0;
}

.kanji-bg__char {
    position: absolute;
    font-size: clamp(3rem, 8vw, 6rem);
    color: var(--neon-purple);
    opacity: 0.08;
    font-weight: 300;
    animation: kanji-float 6s ease-in-out infinite;
    user-select: none;
}

.kanji-bg__char:nth-child(1) { top: 10%; left: 5%; animation-delay: 0s; }
.kanji-bg__char:nth-child(2) { top: 20%; right: 10%; animation-delay: 1s; }
.kanji-bg__char:nth-child(3) { top: 50%; left: 15%; animation-delay: 2s; }
.kanji-bg__char:nth-child(4) { top: 70%; right: 20%; animation-delay: 3s; }
.kanji-bg__char:nth-child(5) { top: 40%; left: 60%; animation-delay: 1.5s; }
.kanji-bg__char:nth-child(6) { top: 80%; left: 40%; animation-delay: 2.5s; }

/* Decorative orb for background */
.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    pointer-events: none;
}

/* Entrance animation for hero content */
.hero-enter {
    animation: fade-in-up 0.8s ease forwards;
}

.hero-enter--delay-1 { animation-delay: 0.1s; opacity: 0; }
.hero-enter--delay-2 { animation-delay: 0.3s; opacity: 0; }
.hero-enter--delay-3 { animation-delay: 0.5s; opacity: 0; }
.hero-enter--delay-4 { animation-delay: 0.7s; opacity: 0; }

/* Prefers reduced motion */
@media (prefers-reduced-motion: reduce) {
    .fade-up,
    .fade-left,
    .fade-right,
    .scale-in {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .gradient-text,
    .gradient-text--blue-purple {
        animation: none;
    }

    .float-animation,
    .float-animation--slow,
    .glow-breathe,
    .border-glow {
        animation: none;
    }

    .hero-enter {
        animation: none;
        opacity: 1;
    }

    .hero-enter--delay-1,
    .hero-enter--delay-2,
    .hero-enter--delay-3,
    .hero-enter--delay-4 {
        opacity: 1;
    }

    .kanji-bg__char {
        animation: none;
    }
}