/* ============================================
   ANIMATIONS & TRANSITIONS
   ============================================ */

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

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

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

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

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

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

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }

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

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.7;
    }
}

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

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

@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }

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

@keyframes float {

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

    50% {
        transform: translateY(-10px);
    }
}

@keyframes glow {

    0%,
    100% {
        box-shadow: 0 0 20px rgba(33, 150, 243, 0.3);
    }

    50% {
        box-shadow: 0 0 30px rgba(33, 150, 243, 0.6);
    }
}

/* === ANIMATION CLASSES === */
.fade-in {
    animation: fadeIn 0.5s ease-out;
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

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

.slide-in-right {
    animation: slideInRight 0.5s ease-out;
}

.animate-pulse {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

.animate-float {
    animation: float 3s ease-in-out infinite;
}

/* Stagger animations for lists */
.stagger-animation>* {
    opacity: 0;
    animation: fadeInUp 0.5s ease-out forwards;
}

.stagger-animation>*:nth-child(1) {
    animation-delay: 0.1s;
}

.stagger-animation>*:nth-child(2) {
    animation-delay: 0.2s;
}

.stagger-animation>*:nth-child(3) {
    animation-delay: 0.3s;
}

.stagger-animation>*:nth-child(4) {
    animation-delay: 0.4s;
}

.stagger-animation>*:nth-child(5) {
    animation-delay: 0.5s;
}

.stagger-animation>*:nth-child(6) {
    animation-delay: 0.6s;
}

/* === LOADING SPINNER === */
.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(0, 0, 0, 0.1);
    border-top-color: hsl(var(--color-primary));
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.spinner-sm {
    width: 20px;
    height: 20px;
    border-width: 2px;
}

.spinner-lg {
    width: 60px;
    height: 60px;
    border-width: 6px;
}

/* Gradient spinner */
.spinner-gradient {
    background: conic-gradient(from 0deg,
            hsl(var(--color-primary)),
            hsl(var(--color-accent)),
            hsl(var(--color-secondary)),
            hsl(var(--color-primary)));
    border: none;
    -webkit-mask: radial-gradient(circle, transparent 50%, black 50%);
    mask: radial-gradient(circle, transparent 50%, black 50%);
}

/* === HOVER EFFECTS === */
.hover-scale {
    transition: transform var(--transition-base);
}

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

.hover-lift {
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.hover-glow {
    transition: box-shadow var(--transition-base);
}

.hover-glow:hover {
    box-shadow: 0 0 20px hsla(var(--color-primary), 0.4);
}

/* === SKELETON LOADING === */
.skeleton {
    background: linear-gradient(90deg,
            hsl(var(--color-background)) 0%,
            hsl(var(--color-surface)) 50%,
            hsl(var(--color-background)) 100%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-md);
}

.skeleton-text {
    height: 1rem;
    margin-bottom: var(--space-sm);
}

.skeleton-heading {
    height: 2rem;
    width: 60%;
    margin-bottom: var(--space-md);
}

.skeleton-card {
    height: 200px;
}

/* === PROGRESS BAR === */
.progress-bar {
    width: 100%;
    height: 8px;
    background: hsl(var(--color-background));
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, hsl(var(--color-primary)), hsl(var(--color-accent)));
    border-radius: var(--radius-full);
    transition: width var(--transition-slow);
}

/* === TOAST NOTIFICATIONS === */
.toast {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    min-width: 300px;
    padding: var(--space-lg);
    background: hsl(var(--color-surface));
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    z-index: var(--z-tooltip);
    animation: slideInRight 0.3s ease-out;
}

.toast.toast-exit {
    animation: slideInRight 0.3s ease-out reverse;
}

/* === BACKDROP BLUR === */
.backdrop-blur {
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

/* === GRADIENT BACKGROUNDS === */
.gradient-bg-primary {
    background: linear-gradient(135deg, hsl(var(--color-primary)), hsl(var(--color-primary-light)));
}

.gradient-bg-secondary {
    background: linear-gradient(135deg, hsl(var(--color-secondary)), hsl(var(--color-secondary-light)));
}

.gradient-bg-accent {
    background: linear-gradient(135deg, hsl(var(--color-accent)), hsl(var(--color-accent-light)));
}

.gradient-bg-hero {
    background: linear-gradient(135deg,
            hsl(var(--color-primary)) 0%,
            hsl(var(--color-accent)) 50%,
            hsl(var(--color-secondary)) 100%);
}

/* === PARTICLE BACKGROUND === */
.particles-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 0;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: hsl(var(--color-primary));
    border-radius: 50%;
    opacity: 0.3;
    animation: float 6s ease-in-out infinite;
}

/* === RESPONSIVE ANIMATIONS === */
@media (prefers-reduced-motion: reduce) {

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