/* ========================================
   PAGE TRANSITIONS
   Smooth navigation between worlds
   ======================================== */

/* Transition overlay */
.page-transition {
    position: fixed;
    inset: 0;
    z-index: var(--z-loading);
    pointer-events: none;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Tunnel effect */
.transition-tunnel {
    position: absolute;
    inset: 0;
    background: var(--bg-primary);
    transform: scale(0);
    border-radius: 50%;
    transition: transform 0.8s cubic-bezier(0.86, 0, 0.07, 1);
}

.page-transition.active .transition-tunnel {
    transform: scale(3);
}

/* Particles during transition */
.transition-particles {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--primary);
    border-radius: 50%;
    opacity: 0;
}

.page-transition.active .transition-particles {
    animation: particle-transition 0.8s ease-out forwards;
}

@keyframes particle-transition {
    0% {
        opacity: 1;
        transform: translate(0, 0) scale(1);
    }

    100% {
        opacity: 0;
        transform: translate(var(--tx), var(--ty)) scale(0);
    }
}

/* Loading text */
.transition-text {
    position: relative;
    z-index: 1;
    font-family: var(--font-mono);
    font-size: var(--text-lg);
    color: var(--primary);
    opacity: 0;
    transform: scale(0.8);
    transition: opacity 0.3s, transform 0.3s;
}

.page-transition.active .transition-text {
    opacity: 1;
    transform: scale(1);
}

/* Warp lines */
.warp-lines {
    position: absolute;
    inset: 0;
    overflow: hidden;
    opacity: 0;
}

.page-transition.active .warp-lines {
    opacity: 1;
}

.warp-line {
    position: absolute;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
    animation: warp 0.5s ease-out forwards;
}

@keyframes warp {
    0% {
        width: 0;
        left: 50%;
        opacity: 1;
    }

    100% {
        width: 100%;
        left: 0;
        opacity: 0;
    }
}

/* Fade transition fallback */
.page-fade-out {
    animation: fadeOut 0.3s ease forwards;
}

.page-fade-in {
    animation: fadeIn 0.5s ease forwards;
}

@keyframes fadeOut {
    from {
        opacity: 1;
    }

    to {
        opacity: 0;
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

/* Slide transitions */
.slide-in-right {
    animation: slideInRight 0.5s ease forwards;
}

.slide-in-left {
    animation: slideInLeft 0.5s ease forwards;
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }

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

@keyframes slideInLeft {
    from {
        transform: translateX(-100%);
        opacity: 0;
    }

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

/* Circuit board reveal */
.circuit-reveal {
    position: fixed;
    inset: 0;
    z-index: var(--z-loading);
    background: var(--bg-primary);
    display: grid;
    grid-template-columns: repeat(10, 1fr);
    grid-template-rows: repeat(10, 1fr);
}

.circuit-cell {
    background: var(--bg-primary);
    border: 1px solid rgba(var(--primary-rgb), 0.1);
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.circuit-reveal.active .circuit-cell {
    transform: scale(0);
    opacity: 0;
}