/* Dark Mode Base Styles */
        :root {
            --main-bg-color: #000;
            --secondary-bg-color: #121212;
            --text-color: #fff;
            --secondary-text-color: #aaa;
            --accent-color: #1DA1F2;
            --border-color: #333;
            --card-bg-color: #1e1e1e;
            --comment-bg-color: #252525;
            --input-bg-color: #333;
            --input-text-color: #fff;
            --button-hover-color: #333;
        }
        
        /* Light Mode Overrides */
        .light-mode {
            --main-bg-color: #fff;
            --secondary-bg-color: #f5f5f5;
            --text-color: #000;
            --secondary-text-color: #666;
            --border-color: #ddd;
            --card-bg-color: #fff;
            --comment-bg-color: #f9f9f9;
            --input-bg-color: #f5f5f5;
            --input-text-color: #000;
            --button-hover-color: #eee;
        }
        
        body {
            background-color: var(--main-bg-color);
            color: var(--text-color);
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            margin: 0;
            padding: 0;
            transition: background-color 0.3s, color 0.3s;
        }
        
        /* Header Styles */
        .header {
            background-color: var(--secondary-bg-color);
            padding: 15px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
        }
        
        .logo {
            font-size: 24px;
            font-weight: bold;
            color: var(--accent-color);
        }
        
        .header-actions {
            display: flex;
            gap: 15px;
            align-items: center;
        }
        
        .theme-toggle {
            background: none;
            border: none;
            color: var(--text-color);
            font-size: 20px;
            cursor: pointer;
            padding: 5px;
            border-radius: 50%;
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: background-color 0.2s;
        }
        
        .theme-toggle:hover {
            background-color: var(--button-hover-color);
        }
        
        .upload-btn {
            background-color: var(--accent-color);
            color: white;
            border: none;
            padding: 8px 15px;
            border-radius: 20px;
            font-weight: bold;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 5px;
            transition: opacity 0.2s;
        }
        
        .upload-btn:hover {
            opacity: 0.9;
        }
        
        /* Main Content Styles */
        .main-content {
            padding: 15px;
            max-width: 600px;
            margin: 0 auto;
            padding-bottom: 70px;
        }
        
        .back-to-photos {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            color: var(--accent-color);
            text-decoration: none;
            margin-bottom: 15px;
            font-size: 14px;
        }
        
        .single-photo-container {
            background-color: var(--card-bg-color);
            border-radius: 10px;
            overflow: hidden;
            margin-bottom: 15px;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
        }
        
        /* Post Header Styles */
        .single-photo-header {
            display: flex;
            align-items: center;
            padding: 12px;
            gap: 10px;
        }
        
        .profile-pic {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            object-fit: cover;
            border: 2px solid var(--accent-color);
        }
        
        .username {
            font-weight: bold;
            color: var(--text-color);
            text-decoration: none;
        }
        
        .verified-badge {
            color: var(--accent-color);
            font-size: 14px;
        }
        
        /* Photo Content Styles */
        .single-photo-content {
            position: relative;
        }
        
        .single-photo-image {
            width: 100%;
            display: block;
            max-height: 600px;
            object-fit: contain;
            background-color: #000;
        }
        
        .image-slider {
            position: relative;
            overflow: hidden;
        }
        
        .image-slider img {
            display: none;
            width: 100%;
            height: auto;
            max-height: 600px;
            object-fit: contain;
            background-color: #000;
        }
        
        .image-slider img.active {
            display: block;
        }
        
        .slider-controls {
            position: absolute;
            top: 50%;
            width: 100%;
            display: flex;
            justify-content: space-between;
            transform: translateY(-50%);
            padding: 0 10px;
            box-sizing: border-box;
        }
        
        .slider-prev, .slider-next {
            background-color: rgba(0, 0, 0, 0.5);
            color: white;
            border: none;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            font-size: 16px;
            transition: background-color 0.2s;
        }
        
        .slider-prev:hover, .slider-next:hover {
            background-color: rgba(0, 0, 0, 0.8);
        }
        
        .slider-dots {
            position: absolute;
            bottom: 15px;
            left: 0;
            right: 0;
            display: flex;
            justify-content: center;
            gap: 8px;
        }
        
        .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: rgba(255, 255, 255, 0.5);
            cursor: pointer;
            transition: background-color 0.2s;
        }
        
        .dot.active {
            background-color: var(--accent-color);
        }
        
        /* Photo Overlay Stats */
        .photo-overlay-stats {
            position: absolute;
            right: 10px;
            bottom: 60px;
            display: flex;
            flex-direction: column;
            gap: 15px;
            color: white;
            text-shadow: 0 1px 2px rgba(0, 0, 0, 0.8);
        }
        
        .photo-overlay-stat {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 3px;
        }
        
        .photo-overlay-stat i {
            font-size: 20px;
        }
        
        .photo-overlay-stat span {
            font-size: 12px;
            font-weight: bold;
        }
        
        /* Caption Styles */
        .single-photo-caption {
            padding: 12px;
            font-size: 14px;
            line-height: 1.4;
            color: var(--text-color);
        }
        
        /* Post Footer Styles */
        .single-photo-footer {
            padding: 12px;
        }
        
        .interaction-buttons {
            display: flex;
            justify-content: space-between;
            margin-bottom: 10px;
        }
        
        .interaction-btn {
            background: none;
            border: none;
            color: var(--text-color);
            font-size: 24px;
            cursor: pointer;
            padding: 5px;
            transition: transform 0.2s, color 0.2s;
        }
        
        .interaction-btn:hover {
            transform: scale(1.1);
        }
        
        .like-btn.active i {
            color: #ff0000;
            animation: like 0.5s ease;
        }
        
        @keyframes like {
            0% { transform: scale(1); }
            50% { transform: scale(1.3); }
            100% { transform: scale(1); }
        }
        
        .timestamp {
            font-size: 12px;
            color: var(--secondary-text-color);
            margin-top: 5px;
        }
        
        /* Sound Info Styles */
        .sound-info {
            margin-top: 15px;
            padding: 10px;
            background-color: var(--comment-bg-color);
            border-radius: 8px;
            display: none;
        }
        
        .sound-info h4 {
            margin: 0 0 5px 0;
            font-size: 14px;
        }
        
        .sound-info p {
            margin: 0 0 5px 0;
            font-size: 12px;
            color: var(--secondary-text-color);
        }
        
        .sound-player {
            width: 100%;
            margin: 10px 0;
        }
        
        .use-sound-btn {
            background-color: var(--accent-color);
            color: white;
            border: none;
            padding: 5px 10px;
            border-radius: 15px;
            font-size: 12px;
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 5px;
        }
        
        /* Comment Panel Styles */
.comment-panel {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--secondary-bg-color);
    border-top-left-radius: 15px;
    border-top-right-radius: 15px;
    height: 70vh;
    z-index: 1001;
    transform: translateY(100%);
    transition: transform 0.3s ease-out;
    display: flex;
    flex-direction: column;
    box-shadow: 0 -5px 15px rgba(0, 0, 0, 0.2);
}

.comment-panel.active {
    transform: translateY(0);
}

.panel-handle {
    width: 40px;
    height: 5px;
    background-color: var(--secondary-text-color);
    border-radius: 5px;
    margin: 10px auto;
    cursor: pointer;
}

.comment-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 15px 10px 15px;
    border-bottom: 1px solid var(--border-color);
}

.comment-panel-header h3 {
    margin: 0;
    font-size: 18px;
}

.comment-panel-header button {
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 24px;
    cursor: pointer;
    padding: 5px;
}

.comment-panel-content {
    flex: 1;
    overflow-y: auto;
    padding: 15px;
}

.no-comments {
    text-align: center;
    padding: 30px 0;
    color: var(--secondary-text-color);
}

.comment-item {
    margin-bottom: 15px;
    padding: 10px;
    background-color: var(--comment-bg-color);
    border-radius: 8px;
}

.comment-user {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 5px;
}

.comment-user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
}

.comment-username {
    font-weight: bold;
    font-size: 14px;
    color: var(--text-color);
    text-decoration: none;
}

.comment-time {
    font-size: 10px;
    color: var(--secondary-text-color);
    margin-left: auto;
}

.comment-text {
    font-size: 14px;
    line-height: 1.4;
    margin: 5px 0;
    color: var(--text-color);
}

.comment-actions {
    display: flex;
    gap: 15px;
    margin-top: 8px;
}

.comment-action {
    font-size: 12px;
    color: var(--secondary-text-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 3px;
}

.comment-action:hover {
    color: var(--accent-color);
}

.comment-panel-footer {
    padding: 10px 15px;
    border-top: 1px solid var(--border-color);
    background-color: var(--secondary-bg-color);
    flex-shrink: 0;
}

.comment-form {
    display: flex;
    gap: 10px;
}

.comment-input {
    flex: 1;
    padding: 10px 15px;
    border-radius: 20px;
    border: none;
    background-color: var(--input-bg-color);
    color: var(--input-text-color);
    font-size: 14px;
    outline: none;
}

.comment-submit {
    background-color: var(--accent-color);
    color: white;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
}

        
        /* Overlay Backdrop */
        .overlay-backdrop {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: rgba(0, 0, 0, 0.5);
            z-index: 1000;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s;
        }
        
        .overlay-backdrop.active {
            opacity: 1;
            pointer-events: all;
        }
        
        /* Bottom Navigation */
        .bottom-nav {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background-color: var(--secondary-bg-color);
            display: flex;
            justify-content: space-around;
            padding: 10px 0;
            z-index: 999;
            border-top: 1px solid var(--border-color);
        }
        
        .nav-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-decoration: none;
            color: var(--secondary-text-color);
            font-size: 10px;
            gap: 3px;
        }
        
        .nav-item.active {
            color: var(--accent-color);
        }
        
        .nav-icon {
            font-size: 20px;
        }
        
        /* Description outside grid */
        .photo-description {
            margin: 15px 0;
            padding: 0 15px;
            font-size: 14px;
            line-height: 1.5;
            color: var(--text-color);
        }
        
        /* Responsive Design */
        @media (max-width: 480px) {
            .main-content {
                padding: 10px;
                padding-bottom: 70px;
            }
            
            .single-photo-container {
                border-radius: 0;
            }
            
            .photo-overlay-stats {
                bottom: 50px;
            }
            
            .interaction-buttons {
                padding: 0 10px;
            }
            
            .comment-panel {
                height: 60vh;
            }
        }
        
        /* Edit/Delete Comment Options */
        .comment-options {
            position: relative;
            margin-left: auto;
        }
        
        .comment-menu-btn {
            background: none;
            border: none;
            color: var(--secondary-text-color);
            cursor: pointer;
            padding: 5px;
        }
        
        .comment-menu {
            position: absolute;
            right: 0;
            bottom: 100%;
            background-color: var(--card-bg-color);
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
            overflow: hidden;
            z-index: 1;
            display: none;
        }
        
        .comment-menu.active {
            display: block;
        }
        
        .comment-menu-item {
            padding: 8px 15px;
            font-size: 14px;
            color: var(--text-color);
            cursor: pointer;
            white-space: nowrap;
        }
        
        .comment-menu-item:hover {
            background-color: var(--button-hover-color);
        }
        
        .comment-menu-item.delete {
            color: #ff4444;
        }