/* ============================================
   Feed Page - Linear Timeline Design
   ============================================ */

.feed-page {
    min-height: 100vh;
    padding: var(--spacing-lg) 0;
    background: var(--color-bg);
}

.feed-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Feed Header */
.feed-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding-top: var(--spacing-lg);
}

.feed-title {
    font-family: var(--font-mono);
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 300;
    letter-spacing: 0.3em;
    color: var(--color-text);
    margin: 0 0 var(--spacing-sm);
    text-shadow: 0 0 30px var(--color-glow);
}

.feed-subtitle {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-text-dim);
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

/* Timeline Container */
.feed-timeline {
    position: relative;
    padding-left: 60px;
}

/* Vertical Timeline Line */
.feed-timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 1px;
    background: linear-gradient(
        180deg,
        transparent 0%,
        var(--color-border) 5%,
        var(--color-border) 95%,
        transparent 100%
    );
}

/* Year Section */
.feed-year {
    position: relative;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid rgba(0, 102, 255, 0.1);
}

.feed-year:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

/* Year Marker (dot on timeline) */
.feed-year::before {
    content: '';
    position: absolute;
    left: -48px;
    top: 8px;
    width: 14px;
    height: 14px;
    background: var(--color-bg);
    border: 2px solid var(--color-text);
    border-radius: 50%;
    box-shadow: 0 0 15px var(--color-glow);
    z-index: 1;
}

/* Year Header */
.feed-year-label {
    display: flex;
    align-items: baseline;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.feed-year-number {
    font-family: var(--font-mono);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 600;
    color: var(--color-text);
    letter-spacing: 0.05em;
    text-shadow: 0 0 20px var(--color-glow);
    line-height: 1;
}

.feed-year-count {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-text-dim);
    letter-spacing: 0.1em;
}

/* Images Grid - 4 Rows Grid Layout with Masonry-like feel */
.feed-images-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
    padding: var(--spacing-sm) 0;
}

/* Individual Image Item */
.feed-image-item {
    position: relative;
    cursor: pointer;
    transition: transform 0.3s ease;
    overflow: visible;
}

.feed-image-item:hover {
    transform: scale(1.03);
    z-index: 10;
}

.feed-image-item img {
    width: 100%;
    height: auto;
    display: block;
    border: 1px solid rgba(0, 102, 255, 0.2);
    transition: border-color 0.3s ease, box-shadow 0.3s ease, filter 0.3s ease;
}

.feed-image-item:hover img {
    border-color: rgba(0, 102, 255, 0.8);
    box-shadow: 
        0 0 20px rgba(0, 102, 255, 0.5),
        0 0 40px rgba(0, 102, 255, 0.3),
        0 0 60px rgba(0, 102, 255, 0.2);
    filter: brightness(1.05);
}

/* Scroll Indicator - hidden in grid mode */
.feed-scroll-hint {
    display: none;
}

/* Modal for Full Image View */
.feed-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.95);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    backdrop-filter: blur(10px);
    cursor: pointer;
}

.feed-modal.active {
    opacity: 1;
    visibility: visible;
}

.feed-modal-content {
    max-width: 90vw;
    max-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feed-modal img {
    max-width: 100%;
    max-height: 90vh;
    object-fit: contain;
    display: block;
}

.feed-modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    font-size: 1.5rem;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.feed-modal-close:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.6);
    transform: rotate(90deg);
}

/* Navigation Arrows in Modal */
.feed-modal-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0, 102, 255, 0.2);
    border: 1px solid rgba(0, 102, 255, 0.5);
    color: white;
    font-size: 2rem;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.feed-modal-nav:hover {
    background: rgba(0, 102, 255, 0.4);
    transform: translateY(-50%) scale(1.1);
}

.feed-modal-prev {
    left: var(--spacing-md);
}

.feed-modal-next {
    right: var(--spacing-md);
}

.feed-modal-counter {
    position: absolute;
    bottom: var(--spacing-md);
    left: 50%;
    transform: translateX(-50%);
    color: var(--color-text-dim);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(0, 0, 0, 0.6);
    border-radius: 4px;
}

/* Loading State */
.feed-loading {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--color-text-dim);
    font-family: var(--font-mono);
}

/* Empty State */
.feed-empty {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--color-text-dim);
    font-family: var(--font-mono);
    max-width: 500px;
    margin: 0 auto;
    line-height: 1.8;
}

/* Responsive Design */
@media (max-width: 768px) {
    .feed-container {
        padding: 0 var(--spacing-sm);
    }
    
    .feed-timeline {
        padding-left: 40px;
    }
    
    .feed-timeline::before {
        left: 12px;
    }
    
    .feed-year::before {
        left: -34px;
        width: 10px;
        height: 10px;
    }
    
    .feed-year-number {
        font-size: 1.8rem;
    }
    
    .feed-images-row {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-sm);
    }
    
    .feed-modal-nav {
        width: 45px;
        height: 45px;
        font-size: 1.5rem;
    }
    
    .feed-modal-prev {
        left: var(--spacing-xs);
    }
    
    .feed-modal-next {
        right: var(--spacing-xs);
    }
}

@media (max-width: 480px) {
    .feed-timeline {
        padding-left: 30px;
    }
    
    .feed-timeline::before {
        left: 8px;
    }
    
    .feed-year::before {
        left: -26px;
        width: 8px;
        height: 8px;
    }
    
    .feed-year-number {
        font-size: 1.5rem;
    }
    
    .feed-year-count {
        font-size: 0.75rem;
    }
    
    .feed-images-row {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .feed-header {
        margin-bottom: var(--spacing-lg);
    }
    
    .feed-title {
        letter-spacing: 0.2em;
    }
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    .feed-scroll-hint span {
        animation: none;
    }
    
    .feed-image-item {
        transition: none;
    }
    
    .feed-image-item:hover {
        transform: none;
    }
}