/* === UNIFIED SMOOTH ANIMATIONS === */

/* === CSS CUSTOM PROPERTIES FOR ANIMATIONS === */
:root {
    --anim-fast: 150ms;
    --anim-normal: 250ms;
    --anim-slow: 350ms;
    --anim-slower: 450ms;
    
    --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
    --ease-out: cubic-bezier(0, 0, 0.2, 1);
    --ease-in: cubic-bezier(0.4, 0, 1, 1);
    --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
}

/* === BASE TRANSITION CLASSES === */
.smooth-transition {
    transition: all var(--anim-normal) var(--ease-smooth);
}

.smooth-transition-fast {
    transition: all var(--anim-fast) var(--ease-smooth);
}

.smooth-transition-slow {
    transition: all var(--anim-slow) var(--ease-smooth);
}

/* === FADE ANIMATIONS === */
@keyframes smoothFadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes smoothFadeOut {
    from {
        opacity: 1;
    }
    to {
        opacity: 0;
    }
}

@keyframes smoothFadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes smoothFadeInScale {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* === SLIDE ANIMATIONS === */
@keyframes smoothSlideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes smoothSlideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* === SCALE ANIMATIONS === */
@keyframes smoothScaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes smoothScaleOut {
    from {
        opacity: 1;
        transform: scale(1);
    }
    to {
        opacity: 0;
        transform: scale(0.9);
    }
}

/* === MODAL ANIMATIONS === */
@keyframes smoothModalIn {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

@keyframes smoothModalOut {
    from {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
    to {
        opacity: 0;
        transform: scale(0.95) translateY(20px);
    }
}

@keyframes smoothBackdropIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* === TAB SWITCHING ANIMATIONS === */
@keyframes smoothTabFadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes smoothTabSlideIn {
    from {
        opacity: 0;
        transform: translateX(15px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* === UTILITY CLASSES === */
.animate-fade-in {
    animation: smoothFadeIn var(--anim-normal) var(--ease-smooth);
}

.animate-fade-in-up {
    animation: smoothFadeInUp var(--anim-normal) var(--ease-smooth);
}

.animate-fade-in-down {
    animation: smoothFadeInDown var(--anim-normal) var(--ease-smooth);
}

.animate-fade-in-scale {
    animation: smoothFadeInScale var(--anim-normal) var(--ease-smooth);
}

.animate-slide-in-right {
    animation: smoothSlideInRight var(--anim-normal) var(--ease-smooth);
}

.animate-slide-in-left {
    animation: smoothSlideInLeft var(--anim-normal) var(--ease-smooth);
}

.animate-scale-in {
    animation: smoothScaleIn var(--anim-normal) var(--ease-smooth);
}

.animate-modal-in {
    animation: smoothModalIn var(--anim-slow) var(--ease-smooth);
}

.animate-tab-in {
    animation: smoothTabFadeIn var(--anim-normal) var(--ease-smooth);
}

/* === STAGGERED ANIMATIONS === */
.stagger-1 { animation-delay: 50ms; }
.stagger-2 { animation-delay: 100ms; }
.stagger-3 { animation-delay: 150ms; }
.stagger-4 { animation-delay: 200ms; }
.stagger-5 { animation-delay: 250ms; }

/* === HOVER EFFECTS === */
.hover-lift {
    transition: transform var(--anim-fast) var(--ease-smooth), 
                box-shadow var(--anim-fast) var(--ease-smooth);
}

.hover-lift:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

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

.hover-scale:hover {
    transform: scale(1.02);
}

/* === PERFORMANCE OPTIMIZATIONS === */
.gpu-accelerated {
    transform: translateZ(0);
    will-change: transform, opacity;
}

/* === REDUCED MOTION SUPPORT === */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}