/* ===================================================================
   CENTRALIZED ANIMATION SYSTEM
   Global animation variables, timing, and accessibility
   =================================================================== */

/* ============ ANIMATION VARIABLES ============ */
:root {
    /* Timing Standards */
    --anim-duration-instant: 0.15s;
    --anim-duration-fast: 0.3s;
    --anim-duration-normal: 0.4s;
    --anim-duration-slow: 0.6s;
    --anim-duration-slower: 0.8s;

    /* Easing Functions */
    --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    --ease-in: cubic-bezier(0.4, 0, 1, 1);
    --ease-out: cubic-bezier(0, 0, 0.2, 1);
    --ease-in-out: cubic-bezier(0.4, 0, 0.6, 1);

    /* Combined Transitions */
    --transition-instant: all var(--anim-duration-instant) var(--ease-smooth);
    --transition-fast: all var(--anim-duration-fast) var(--ease-smooth);
    --transition-normal: all var(--anim-duration-normal) var(--ease-smooth);
    --transition-slow: all var(--anim-duration-slow) var(--ease-smooth);

    /* Loop Animation Durations */
    --anim-pulse: 2s;
    --anim-float: 3s;
    --anim-wave: 2s;
    --anim-shimmer: 2s;
}

/* ============ PERFORMANCE OPTIMIZATIONS ============ */

/* GPU-accelerated transforms */
.will-animate {
    will-change: transform;
    backface-visibility: hidden;
    perspective: 1000px;
}

.will-fade {
    will-change: opacity;
}

.will-transform-fade {
    will-change: transform, opacity;
    backface-visibility: hidden;
}

/* Remove will-change after animation */
.animated {
    will-change: auto;
}

/* ============ ACCESSIBILITY ============ */

/* Respect user's motion preferences */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        animation-delay: 0ms !important;
        transition-duration: 0.01ms !important;
        transition-delay: 0ms !important;
    }

    /* Disable problematic animations */
    .profile-image-minimal,
    .floating-icon,
    .wave-emoji,
    .circular-background {
        animation: none !important;
    }

    /* Keep essential feedback */
    button:active,
    .btn:active {
        transition-duration: 0.1s !important;
    }
}

/* ============ STANDARDIZED KEYFRAMES ============ */

/* Pulse - for status indicators */
@keyframes pulse-unified {

    0%,
    100% {
        opacity: 1;
        transform: scale(1);
    }

    50% {
        opacity: 0.7;
        transform: scale(1.05);
    }
}

/* Float - for floating elements */
@keyframes float-unified {

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

    50% {
        transform: translateY(-20px);
    }
}

/* Fade In Up - for entrance animations */
@keyframes fadeInUp-unified {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

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

/* Shimmer - for loading states */
@keyframes shimmer-unified {
    0% {
        background-position: -1000px 0;
    }

    100% {
        background-position: 1000px 0;
    }
}

/* Slide Up - for messages/notifications */
@keyframes slideUp-unified {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

/* ============ HOVER EFFECT CLASSES ============ */

/* Standard card hover */
.hover-lift {
    transition: transform var(--anim-duration-fast) var(--ease-smooth),
        box-shadow var(--anim-duration-fast) var(--ease-smooth);
}

.hover-lift:hover {
    transform: translateY(-8px);
}

/* Button hover */
.hover-scale {
    transition: transform var(--anim-duration-fast) var(--ease-smooth);
}

.hover-scale:hover {
    transform: scale(1.05);
}

/* Icon hover */
.hover-rotate {
    transition: transform var(--anim-duration-normal) var(--ease-bounce);
}

.hover-rotate:hover {
    transform: rotate(10deg) scale(1.1);
}

/* ============ ENTRANCE ANIMATION UTILITIES ============ */

.fade-in {
    animation: fadeInUp-unified var(--anim-duration-slow) var(--ease-smooth) backwards;
}

.slide-up {
    animation: slideUp-unified var(--anim-duration-fast) var(--ease-smooth);
}

/* ============ LOADING STATES ============ */

.shimmer-effect {
    background: linear-gradient(90deg,
            rgba(255, 255, 255, 0) 0%,
            rgba(255, 255, 255, 0.2) 50%,
            rgba(255, 255, 255, 0) 100%);
    background-size: 1000px 100%;
    animation: shimmer-unified var(--anim-shimmer) infinite linear;
}

[data-theme="dark"] .shimmer-effect {
    background: linear-gradient(90deg,
            rgba(255, 255, 255, 0) 0%,
            rgba(255, 255, 255, 0.1) 50%,
            rgba(255, 255, 255, 0) 100%);
}

/* ============ STATUS INDICATORS ============ */

.pulse-indicator {
    animation: pulse-unified var(--anim-pulse) ease-in-out infinite;
}

.float-indicator {
    animation: float-unified var(--anim-float) ease-in-out infinite;
}

/* ============ SMOOTH SCROLLING ============ */

html {
    scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
}

/* ============ FOCUS STATES ============ */

/* Ensure focus indicators are animated smoothly */
*:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 4px;
    transition: outline-offset var(--anim-duration-fast) var(--ease-smooth);
}

/* ============ PAGE TRANSITIONS ============ */

/* Smooth page load */
body {
    animation: fadeInUp-unified 0.5s var(--ease-smooth);
}

@media (prefers-reduced-motion: reduce) {
    body {
        animation: none;
    }
}