/* Premium UI Micro-animations & Keyframes */

/* 1. Keyframe Definitions */

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

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.96);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

@keyframes pulse-glow {
    0% {
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(16, 185, 129, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
    }
}

/* 2. Utility Animation Classes */

.animate-fade-in {
    animation: fadeIn 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.animate-slide-up {
    animation: slideUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.animate-scale-in {
    animation: scaleIn 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

/* 3. Hover Interactions (Premium Card Elevates) */

.animate-hover {
    transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1), 
                box-shadow 0.3s cubic-bezier(0.25, 0.8, 0.25, 1), 
                border-color 0.3s ease;
}

.animate-hover:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 24px -10px rgba(0, 0, 0, 0.15);
    border-color: var(--primary-light);
}

.dark-theme .animate-hover:hover {
    box-shadow: 0 12px 24px -10px rgba(0, 0, 0, 0.5);
    border-color: var(--primary);
}

/* Star feedback pulse animation */
.star-btn svg {
    transition: transform 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.star-btn:hover svg {
    transform: scale(1.2);
}

.star-btn:active svg {
    transform: scale(0.9);
}

/* Rotating spinners */
.spinner-icon {
    animation: spin 1s linear infinite;
}

/* 4. Advanced Premium Interactions */

/* Button Sheen Effect */
@keyframes sheen {
    0% {
        transform: translateX(-100%) skewX(-15deg);
    }
    100% {
        transform: translateX(200%) skewX(-15deg);
    }
}

.btn-premium {
    position: relative;
    overflow: hidden;
}

.btn-premium::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 30%;
    height: 100%;
    background: linear-gradient(
        to right,
        rgba(255, 255, 255, 0) 0%,
        rgba(255, 255, 255, 0.3) 50%,
        rgba(255, 255, 255, 0) 100%
    );
    transform: translateX(-100%) skewX(-15deg);
    transition: none;
}

.btn-premium:hover::after {
    animation: sheen 1.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Stagger Utilities */
.stagger-1 { animation-delay: 0.1s; }
.stagger-2 { animation-delay: 0.2s; }
.stagger-3 { animation-delay: 0.3s; }
.stagger-4 { animation-delay: 0.4s; }
.stagger-5 { animation-delay: 0.5s; }
.stagger-6 { animation-delay: 0.6s; }