/* Page Transitions CSS */

:root {
    --transition-primary: #6366f1;
    --transition-secondary: #0a0e27;
    --transition-accent: #1a1f3a;
    --transition-duration: 400ms;
}

/* Main transition container */
.page-transition-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none !important;
    z-index: 9999;
    overflow: hidden;
    display: none;
}

.page-transition-container.transitioning-out,
.page-transition-container.transitioning-in {
    display: block;
}

.page-transition-container * {
    pointer-events: none !important;
}

/* Transition overlays */
.transition-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--transition-secondary) 0%, var(--transition-accent) 50%, var(--transition-secondary) 100%);
    transform: translateY(-100%);
    transition: transform var(--transition-duration) cubic-bezier(0.4, 0, 0.2, 1);
}

.transition-overlay-2 {
    background: linear-gradient(135deg, var(--transition-accent) 0%, var(--transition-secondary) 50%, var(--transition-accent) 100%);
    transform: translateY(100%);
}

/* Transitioning states */
.page-transition-container.transitioning-out .transition-overlay {
    transform: translateY(0);
}

.page-transition-container.transitioning-in .transition-overlay {
    transform: translateY(100%);
}

.page-transition-container.transitioning-in .transition-overlay-2 {
    transform: translateY(-100%);
}

/* Particle effect */
.particle-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.transition-particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: radial-gradient(circle, var(--transition-primary) 0%, transparent 70%);
    border-radius: 50%;
    animation: particleFloat 3s infinite ease-in-out;
    opacity: 0;
}

@keyframes particleFloat {
    0%, 100% {
        transform: translateY(0) translateX(0);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    50% {
        transform: translateY(-50px) translateX(20px);
    }
}

.page-transition-container.transitioning-out.particle-burst .particle-container {
    opacity: 1;
}

.page-transition-container.transitioning-out.particle-burst .transition-particle {
    animation: particleBurst 0.4s ease-out forwards;
}

@keyframes particleBurst {
    0% {
        transform: scale(0) translate(0, 0);
        opacity: 0;
    }
    50% {
        opacity: 1;
    }
    100% {
        transform: scale(20) translate(var(--tx, 50px), var(--ty, -50px));
        opacity: 0;
    }
}

/* Matrix rain effect */
.matrix-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.3s ease;
    overflow: hidden;
}

.matrix-column {
    position: absolute;
    top: -100%;
    font-family: 'Courier New', monospace;
    font-size: 14px;
    line-height: 20px;
    color: #00ff00;
    text-shadow: 0 0 5px #00ff00;
    animation: matrixFall 4s linear infinite;
    opacity: 0;
}

@keyframes matrixFall {
    0% {
        top: -100%;
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        top: 100%;
        opacity: 0;
    }
}

.page-transition-container.transitioning-out.matrix-fade .matrix-container {
    opacity: 0.3;
}

.page-transition-container.transitioning-out.matrix-fade .matrix-column {
    animation: matrixFadeIn 0.4s ease-out forwards;
}

@keyframes matrixFadeIn {
    0% {
        opacity: 0;
        transform: translateY(-20px);
    }
    100% {
        opacity: 0.8;
        transform: translateY(0);
    }
}

/* Tech grid overlay */
.tech-grid-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: grid;
    grid-template-columns: repeat(15, 1fr);
    grid-template-rows: repeat(10, 1fr);
    gap: 2px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.tech-grid-cell {
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.2);
    opacity: 0;
    transform: scale(0.8);
    transition: all 0.3s ease;
}

.page-transition-container.transitioning-out.tech-grid-sweep .tech-grid-overlay {
    opacity: 1;
}

.page-transition-container.transitioning-out.tech-grid-sweep .tech-grid-cell {
    animation: gridCellSweep 0.4s ease-out forwards;
}

@keyframes gridCellSweep {
    0% {
        opacity: 0;
        transform: scale(0.8) rotateX(90deg);
    }
    50% {
        opacity: 1;
        transform: scale(1.1) rotateX(0deg);
    }
    100% {
        opacity: 0;
        transform: scale(1) rotateX(-90deg);
    }
}

/* Loading state styles */
body.page-loading {
    overflow: hidden;
}

body.page-loading::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 14, 39, 0.9);
    z-index: 9998;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Glitch effect for transitions */
@keyframes glitch {
    0%, 100% {
        transform: translate(0);
        filter: hue-rotate(0deg);
    }
    20% {
        transform: translate(-1px, 1px);
        filter: hue-rotate(90deg);
    }
    40% {
        transform: translate(1px, -1px);
        filter: hue-rotate(180deg);
    }
    60% {
        transform: translate(-1px, -1px);
        filter: hue-rotate(270deg);
    }
    80% {
        transform: translate(1px, 1px);
        filter: hue-rotate(360deg);
    }
}

.page-transition-container.transitioning-out {
    animation: glitch 0.3s ease-in-out;
}

/* AI pulse effect */
.page-transition-container::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.4) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    transition: all var(--transition-duration) ease;
}

.page-transition-container.transitioning-out::before {
    width: 200vw;
    height: 200vw;
    opacity: 0;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .matrix-column {
        font-size: 12px;
        line-height: 16px;
    }
    
    .tech-grid-overlay {
        grid-template-columns: repeat(10, 1fr);
        grid-template-rows: repeat(15, 1fr);
    }
    
    .transition-particle {
        width: 3px;
        height: 3px;
    }
}

/* Performance optimizations */
.page-transition-container * {
    will-change: transform, opacity;
}

/* Cleanup after transition */
.page-transition-container:not(.transitioning-out):not(.transitioning-in) * {
    will-change: auto;
}

/* Smooth fade for content */
body > *:not(.page-transition-container) {
    animation: contentFadeIn 0.3s ease-out;
}

@keyframes contentFadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}