/* ===================================
   MOTION SYSTEM
   =================================== */
:root {
    --ease-out: cubic-bezier(0.25, 0.8, 0.4, 1);
    --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
    --anim-fast: 180ms var(--ease-out);
    --anim-base: 260ms var(--ease-out);
    --anim-slow: 380ms var(--ease-in-out);
}

@keyframes fade-rise {
    from {
        opacity: 0;
        transform: translateY(24px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float-y {
    0% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-6px);
    }

    100% {
        transform: translateY(0);
    }
}

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

    50% {
        background-position: 100% 50%;
    }

    100% {
        background-position: 0% 50%;
    }
}

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

    100% {
        background-position: 200% 0;
    }
}

@keyframes pulse-glow {
    0% {
        box-shadow: 0 0 0 0 rgba(0, 212, 170, 0.35);
    }

    100% {
        box-shadow: 0 0 0 16px rgba(0, 212, 170, 0);
    }
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

/* ===================================
   REVEAL SYSTEM (IntersectionObserver hooks)
   =================================== */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity var(--anim-base), transform var(--anim-base);
}

.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.reveal-stagger>* {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity var(--anim-base), transform var(--anim-base);
    transition-delay: calc(var(--i, 0) * 80ms);
}

.reveal-stagger.is-visible>* {
    opacity: 1;
    transform: translateY(0);
}

/* ===================================
   HOVER MICROINTERACTIONS
   =================================== */
.hover-card {
    transition: transform var(--anim-base), box-shadow var(--anim-base), border-color var(--anim-base);
}

.hover-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
    border-color: var(--accent-primary);
}

.hover-glow {
    position: relative;
    overflow: hidden;
    transition: color var(--anim-fast), border-color var(--anim-fast), box-shadow var(--anim-base);
}

.hover-glow::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 20% 20%, rgba(0, 212, 170, 0.08), transparent 45%);
    opacity: 0;
    transition: opacity var(--anim-base);
    pointer-events: none;
}

.hover-glow:hover::after {
    opacity: 1;
}

.hover-button {
    transition: transform var(--anim-fast), box-shadow var(--anim-fast), background var(--anim-base);
}

.hover-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
}

.hover-button:active {
    transform: translateY(0) scale(0.98);
}

.hover-underline {
    position: relative;
}

.hover-underline::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 100%;
    height: 2px;
    background: var(--accent-gradient);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--anim-fast);
}

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

/* ===================================
   BACKGROUND EFFECTS
   =================================== */
.hero-bg-animate {
    background-size: 200% 200%;
    animation: gradient-shift 10s ease infinite;
}

.float-slow {
    animation: float-y 6s ease-in-out infinite;
}

/* ===================================
   LOADERS & SKELETONS
   =================================== */
.loader-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: rotate 1s linear infinite;
}

.loader-dots {
    display: inline-flex;
    gap: 8px;
    align-items: center;
}

.loader-dots span {
    width: 10px;
    height: 10px;
    background: var(--accent-primary);
    border-radius: 50%;
    animation: float-y 1.4s ease-in-out infinite;
}

.loader-dots span:nth-child(2) {
    animation-delay: 0.15s;
}

.loader-dots span:nth-child(3) {
    animation-delay: 0.3s;
}

.skeleton {
    background: linear-gradient(90deg,
            var(--bg-tertiary) 25%,
            var(--bg-elevated) 50%,
            var(--bg-tertiary) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.4s linear infinite;
    border-radius: var(--radius-md);
}

/* ===================================
   ACCESSIBILITY & REDUCED MOTION
   =================================== */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
    }

    .reveal,
    .reveal-stagger>* {
        opacity: 1 !important;
        transform: none !important;
    }
}