/* Custom animations and utilities */
@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-slide-up {
    animation: slideUp 0.5s ease-out;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #555;
}

/* Post card hover effects */
.post-card {
    transition: all 0.3s ease;
}

.post-card:hover {
    transform: translateY(-2px);
}

/* Gradient backgrounds for text-only posts */
.gradient-1 { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); }
.gradient-2 { background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%); }
.gradient-3 { background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%); }
.gradient-4 { background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%); }
.gradient-5 { background: linear-gradient(135deg, #fa709a 0%, #fee140 100%); }

/* Video container responsive */
.video-container {
    position: relative;
    padding-bottom: 177.78%; /* 9:16 Aspect Ratio */
    height: 0;
    overflow: hidden;
}

.video-container video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Gallery grid styles */
.gallery-grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2px;
}

.gallery-grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2px;
}

.gallery-grid-4 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: repeat(2, 1fr);
    gap: 2px;
}

/* Floating action button */
.fab {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1000;
    transition: all 0.3s ease;
}

.fab:hover {
    transform: scale(1.1) rotate(90deg);
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    body {
        background-color: #1a1a1a;
    }
}

/* Loading skeleton */
.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}