/**
 * Contacts Manager - Object Sharing UI Components
 * Modern, colorful UI components for sharing objects (TEXT, IMAGE, VIDEO, URL, etc.)
 * Version 4.0.0
 */

/* ========================================
   Object Type Color Variables
   ======================================== */
:root {
    /* Object Type Primary Colors */
    --object-text-color: #3B82F6;
    --object-image-color: #10B981;
    --object-video-color: #8B5CF6;
    --object-url-color: #F59E0B;
    --object-multimedia-color: #EC4899;
    --object-file-color: #6B7280;
    --object-profile-color: #06B6D4;
    --object-email-color: #EF4444;

    /* Object Type Light Backgrounds */
    --object-text-light: rgba(59, 130, 246, 0.1);
    --object-image-light: rgba(16, 185, 129, 0.1);
    --object-video-light: rgba(139, 92, 246, 0.1);
    --object-url-light: rgba(245, 158, 11, 0.1);
    --object-multimedia-light: rgba(236, 72, 153, 0.1);
    --object-file-light: rgba(107, 114, 128, 0.1);
    --object-profile-light: rgba(6, 182, 212, 0.1);
    --object-email-light: rgba(239, 68, 68, 0.1);

    /* Object Type Gradients */
    --object-text-gradient: linear-gradient(135deg, #3B82F6 0%, #60A5FA 100%);
    --object-image-gradient: linear-gradient(135deg, #10B981 0%, #34D399 100%);
    --object-video-gradient: linear-gradient(135deg, #8B5CF6 0%, #A78BFA 100%);
    --object-url-gradient: linear-gradient(135deg, #F59E0B 0%, #FBBF24 100%);
    --object-multimedia-gradient: linear-gradient(135deg, #EC4899 0%, #F472B6 100%);
    --object-file-gradient: linear-gradient(135deg, #6B7280 0%, #9CA3AF 100%);
    --object-profile-gradient: linear-gradient(135deg, #06B6D4 0%, #22D3EE 100%);
    --object-email-gradient: linear-gradient(135deg, #EF4444 0%, #F87171 100%);

    /* Object Type Glow Shadows */
    --object-text-glow: 0 0 20px rgba(59, 130, 246, 0.4);
    --object-image-glow: 0 0 20px rgba(16, 185, 129, 0.4);
    --object-video-glow: 0 0 20px rgba(139, 92, 246, 0.4);
    --object-url-glow: 0 0 20px rgba(245, 158, 11, 0.4);
    --object-multimedia-glow: 0 0 20px rgba(236, 72, 153, 0.4);
    --object-file-glow: 0 0 20px rgba(107, 114, 128, 0.4);
    --object-profile-glow: 0 0 20px rgba(6, 182, 212, 0.4);
    --object-email-glow: 0 0 20px rgba(239, 68, 68, 0.4);

    /* Sharing Panel Layout */
    --sharing-panel-width: 22rem;
    --share-card-radius: var(--radius-lg);
}

/* Dark Theme Overrides */
[data-theme="dark"] {
    --object-text-light: rgba(59, 130, 246, 0.15);
    --object-image-light: rgba(16, 185, 129, 0.15);
    --object-video-light: rgba(139, 92, 246, 0.15);
    --object-url-light: rgba(245, 158, 11, 0.15);
    --object-multimedia-light: rgba(236, 72, 153, 0.15);
    --object-file-light: rgba(107, 114, 128, 0.15);
    --object-profile-light: rgba(6, 182, 212, 0.15);
    --object-email-light: rgba(239, 68, 68, 0.15);
}

/* ========================================
   1. OBJECT TYPE SELECTOR (Pill/Chip Filter)
   ======================================== */
.object-type-selector {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 0.5rem 0;
}

.object-type-selector.compact {
    gap: 0.375rem;
}

/* Individual Type Chip */
.object-type-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background-color: var(--bg-secondary);
    border: 1.5px solid var(--border-primary);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    user-select: none;
    position: relative;
    overflow: hidden;
}

.object-type-chip::before {
    content: '';
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity var(--transition-fast);
    border-radius: inherit;
}

.object-type-chip:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.object-type-chip i {
    font-size: 0.875rem;
    transition: transform var(--transition-fast);
}

.object-type-chip:hover i {
    transform: scale(1.1);
}

.object-type-chip .chip-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 1.25rem;
    height: 1.25rem;
    padding: 0 0.375rem;
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-full);
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-left: 0.25rem;
}

/* Active/Selected State - Type-specific colors */
.object-type-chip.active {
    color: white;
    border-color: transparent;
    box-shadow: var(--shadow-md);
}

.object-type-chip.active .chip-count {
    background-color: rgba(255, 255, 255, 0.25);
    color: white;
}

/* TEXT Type */
.object-type-chip[data-type="text"] { --chip-color: var(--object-text-color); }
.object-type-chip[data-type="text"]:hover { border-color: var(--object-text-color); color: var(--object-text-color); }
.object-type-chip[data-type="text"].active {
    background: var(--object-text-gradient);
    box-shadow: var(--object-text-glow);
}
.object-type-chip[data-type="text"].active::before {
    background: radial-gradient(circle at 30% 30%, rgba(255,255,255,0.2) 0%, transparent 60%);
    opacity: 1;
}

/* IMAGE Type */
.object-type-chip[data-type="image"] { --chip-color: var(--object-image-color); }
.object-type-chip[data-type="image"]:hover { border-color: var(--object-image-color); color: var(--object-image-color); }
.object-type-chip[data-type="image"].active {
    background: var(--object-image-gradient);
    box-shadow: var(--object-image-glow);
}
.object-type-chip[data-type="image"].active::before {
    background: radial-gradient(circle at 30% 30%, rgba(255,255,255,0.2) 0%, transparent 60%);
    opacity: 1;
}

/* VIDEO Type */
.object-type-chip[data-type="video"] { --chip-color: var(--object-video-color); }
.object-type-chip[data-type="video"]:hover { border-color: var(--object-video-color); color: var(--object-video-color); }
.object-type-chip[data-type="video"].active {
    background: var(--object-video-gradient);
    box-shadow: var(--object-video-glow);
}
.object-type-chip[data-type="video"].active::before {
    background: radial-gradient(circle at 30% 30%, rgba(255,255,255,0.2) 0%, transparent 60%);
    opacity: 1;
}

/* URL Type */
.object-type-chip[data-type="url"] { --chip-color: var(--object-url-color); }
.object-type-chip[data-type="url"]:hover { border-color: var(--object-url-color); color: var(--object-url-color); }
.object-type-chip[data-type="url"].active {
    background: var(--object-url-gradient);
    box-shadow: var(--object-url-glow);
}
.object-type-chip[data-type="url"].active::before {
    background: radial-gradient(circle at 30% 30%, rgba(255,255,255,0.2) 0%, transparent 60%);
    opacity: 1;
}

/* MULTIMEDIA Type */
.object-type-chip[data-type="multimedia"] { --chip-color: var(--object-multimedia-color); }
.object-type-chip[data-type="multimedia"]:hover { border-color: var(--object-multimedia-color); color: var(--object-multimedia-color); }
.object-type-chip[data-type="multimedia"].active {
    background: var(--object-multimedia-gradient);
    box-shadow: var(--object-multimedia-glow);
}
.object-type-chip[data-type="multimedia"].active::before {
    background: radial-gradient(circle at 30% 30%, rgba(255,255,255,0.2) 0%, transparent 60%);
    opacity: 1;
}

/* FILE Type */
.object-type-chip[data-type="file"] { --chip-color: var(--object-file-color); }
.object-type-chip[data-type="file"]:hover { border-color: var(--object-file-color); color: var(--object-file-color); }
.object-type-chip[data-type="file"].active {
    background: var(--object-file-gradient);
    box-shadow: var(--object-file-glow);
}
.object-type-chip[data-type="file"].active::before {
    background: radial-gradient(circle at 30% 30%, rgba(255,255,255,0.2) 0%, transparent 60%);
    opacity: 1;
}

/* PROFILE Type */
.object-type-chip[data-type="profile"] { --chip-color: var(--object-profile-color); }
.object-type-chip[data-type="profile"]:hover { border-color: var(--object-profile-color); color: var(--object-profile-color); }
.object-type-chip[data-type="profile"].active {
    background: var(--object-profile-gradient);
    box-shadow: var(--object-profile-glow);
}
.object-type-chip[data-type="profile"].active::before {
    background: radial-gradient(circle at 30% 30%, rgba(255,255,255,0.2) 0%, transparent 60%);
    opacity: 1;
}

/* EMAIL Type */
.object-type-chip[data-type="email"] { --chip-color: var(--object-email-color); }
.object-type-chip[data-type="email"]:hover { border-color: var(--object-email-color); color: var(--object-email-color); }
.object-type-chip[data-type="email"].active {
    background: var(--object-email-gradient);
    box-shadow: var(--object-email-glow);
}
.object-type-chip[data-type="email"].active::before {
    background: radial-gradient(circle at 30% 30%, rgba(255,255,255,0.2) 0%, transparent 60%);
    opacity: 1;
}

/* "All" Type Chip */
.object-type-chip[data-type="all"] {
    background: var(--bg-tertiary);
}
.object-type-chip[data-type="all"]:hover {
    background: var(--bg-hover);
    border-color: var(--color-primary);
    color: var(--color-primary);
}
.object-type-chip[data-type="all"].active {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    box-shadow: var(--shadow-primary);
}

/* ========================================
   2. SHARE CARD Component
   ======================================== */
.share-card {
    display: flex;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-primary);
    border-radius: var(--share-card-radius);
    overflow: hidden;
    transition: all var(--transition-fast);
    cursor: pointer;
    position: relative;
}

.share-card:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.share-card.selected {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px var(--color-primary-light);
}

/* Left Color Bar - Type Indicator */
.share-card-type-bar {
    width: 4px;
    flex-shrink: 0;
    transition: width var(--transition-fast);
}

.share-card:hover .share-card-type-bar {
    width: 6px;
}

/* Type-specific bar colors */
.share-card[data-type="text"] .share-card-type-bar { background: var(--object-text-gradient); }
.share-card[data-type="image"] .share-card-type-bar { background: var(--object-image-gradient); }
.share-card[data-type="video"] .share-card-type-bar { background: var(--object-video-gradient); }
.share-card[data-type="url"] .share-card-type-bar { background: var(--object-url-gradient); }
.share-card[data-type="multimedia"] .share-card-type-bar { background: var(--object-multimedia-gradient); }
.share-card[data-type="file"] .share-card-type-bar { background: var(--object-file-gradient); }
.share-card[data-type="profile"] .share-card-type-bar { background: var(--object-profile-gradient); }
.share-card[data-type="email"] .share-card-type-bar { background: var(--object-email-gradient); }

/* Card Content Area */
.share-card-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 1rem;
    min-width: 0;
}

/* Card Header with Icon and Title */
.share-card-header {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.share-card-icon {
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    flex-shrink: 0;
    font-size: 1rem;
    transition: transform var(--transition-fast);
}

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

/* Type-specific icon backgrounds */
.share-card[data-type="text"] .share-card-icon { background: var(--object-text-light); color: var(--object-text-color); }
.share-card[data-type="image"] .share-card-icon { background: var(--object-image-light); color: var(--object-image-color); }
.share-card[data-type="video"] .share-card-icon { background: var(--object-video-light); color: var(--object-video-color); }
.share-card[data-type="url"] .share-card-icon { background: var(--object-url-light); color: var(--object-url-color); }
.share-card[data-type="multimedia"] .share-card-icon { background: var(--object-multimedia-light); color: var(--object-multimedia-color); }
.share-card[data-type="file"] .share-card-icon { background: var(--object-file-light); color: var(--object-file-color); }
.share-card[data-type="profile"] .share-card-icon { background: var(--object-profile-light); color: var(--object-profile-color); }
.share-card[data-type="email"] .share-card-icon { background: var(--object-email-light); color: var(--object-email-color); }

.share-card-title-area {
    flex: 1;
    min-width: 0;
}

.share-card-title {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.25rem 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.share-card-type-label {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.125rem 0.5rem;
    border-radius: var(--radius-sm);
}

/* Type-specific labels */
.share-card[data-type="text"] .share-card-type-label { background: var(--object-text-light); color: var(--object-text-color); }
.share-card[data-type="image"] .share-card-type-label { background: var(--object-image-light); color: var(--object-image-color); }
.share-card[data-type="video"] .share-card-type-label { background: var(--object-video-light); color: var(--object-video-color); }
.share-card[data-type="url"] .share-card-type-label { background: var(--object-url-light); color: var(--object-url-color); }
.share-card[data-type="multimedia"] .share-card-type-label { background: var(--object-multimedia-light); color: var(--object-multimedia-color); }
.share-card[data-type="file"] .share-card-type-label { background: var(--object-file-light); color: var(--object-file-color); }
.share-card[data-type="profile"] .share-card-type-label { background: var(--object-profile-light); color: var(--object-profile-color); }
.share-card[data-type="email"] .share-card-type-label { background: var(--object-email-light); color: var(--object-email-color); }

/* Preview Content */
.share-card-preview {
    margin-bottom: 0.75rem;
}

.share-card-preview-text {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.share-card-preview-image {
    width: 100%;
    height: 8rem;
    object-fit: cover;
    border-radius: var(--radius-md);
    background-color: var(--bg-tertiary);
}

.share-card-preview-url {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    background-color: var(--bg-secondary);
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
    color: var(--object-url-color);
    text-decoration: none;
    overflow: hidden;
}

.share-card-preview-url i {
    flex-shrink: 0;
}

.share-card-preview-url span {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Shared By/With Info */
.share-card-meta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-primary);
    margin-top: auto;
}

.share-card-user {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex: 1;
    min-width: 0;
}

.share-card-avatar {
    width: 1.75rem;
    height: 1.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-purple) 100%);
    border-radius: var(--radius-full);
    color: white;
    font-size: 0.625rem;
    font-weight: 600;
    flex-shrink: 0;
}

.share-card-user-info {
    min-width: 0;
}

.share-card-user-label {
    font-size: 0.6875rem;
    color: var(--text-muted);
    margin-bottom: 0.125rem;
}

.share-card-user-name {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.share-card-timestamp {
    font-size: 0.75rem;
    color: var(--text-muted);
    white-space: nowrap;
}

/* Card Actions */
.share-card-actions {
    display: flex;
    gap: 0.25rem;
    opacity: 0;
    transition: opacity var(--transition-fast);
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
}

.share-card:hover .share-card-actions {
    opacity: 1;
}

.share-card-action {
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.share-card-action:hover {
    background-color: var(--color-primary-light);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.share-card-action.danger:hover {
    background-color: var(--color-danger-light);
    border-color: var(--color-danger);
    color: var(--color-danger);
}

/* ========================================
   3. ACTIVITY FEED ITEM
   ======================================== */
.activity-feed {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.activity-feed-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.activity-feed-item:hover {
    background-color: var(--bg-hover);
    border-color: var(--border-hover);
}

/* Avatar with Type Badge */
.activity-avatar-wrapper {
    position: relative;
    flex-shrink: 0;
}

.activity-avatar {
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-purple) 100%);
    border-radius: var(--radius-full);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
}

.activity-type-badge {
    position: absolute;
    bottom: -2px;
    right: -2px;
    width: 1.25rem;
    height: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    border: 2px solid var(--bg-primary);
    font-size: 0.5rem;
    color: white;
}

/* Type-specific badge colors */
.activity-type-badge[data-type="text"] { background: var(--object-text-gradient); }
.activity-type-badge[data-type="image"] { background: var(--object-image-gradient); }
.activity-type-badge[data-type="video"] { background: var(--object-video-gradient); }
.activity-type-badge[data-type="url"] { background: var(--object-url-gradient); }
.activity-type-badge[data-type="multimedia"] { background: var(--object-multimedia-gradient); }
.activity-type-badge[data-type="file"] { background: var(--object-file-gradient); }
.activity-type-badge[data-type="profile"] { background: var(--object-profile-gradient); }
.activity-type-badge[data-type="email"] { background: var(--object-email-gradient); }

/* Activity Content */
.activity-content {
    flex: 1;
    min-width: 0;
}

.activity-text {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.4;
    margin: 0;
}

.activity-text strong {
    color: var(--text-primary);
    font-weight: 600;
}

.activity-text .activity-type-text {
    font-weight: 500;
}

/* Type-specific text colors */
.activity-text .activity-type-text[data-type="text"] { color: var(--object-text-color); }
.activity-text .activity-type-text[data-type="image"] { color: var(--object-image-color); }
.activity-text .activity-type-text[data-type="video"] { color: var(--object-video-color); }
.activity-text .activity-type-text[data-type="url"] { color: var(--object-url-color); }
.activity-text .activity-type-text[data-type="multimedia"] { color: var(--object-multimedia-color); }
.activity-text .activity-type-text[data-type="file"] { color: var(--object-file-color); }
.activity-text .activity-type-text[data-type="profile"] { color: var(--object-profile-color); }
.activity-text .activity-type-text[data-type="email"] { color: var(--object-email-color); }

.activity-time {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* Activity Indicator Dot */
.activity-indicator {
    width: 0.5rem;
    height: 0.5rem;
    border-radius: var(--radius-full);
    flex-shrink: 0;
}

.activity-indicator.unread {
    background: var(--color-primary);
    animation: pulseIndicator 2s ease-in-out infinite;
}

@keyframes pulseIndicator {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.8); }
}

/* ========================================
   4. QUICK SHARE MODAL
   ======================================== */
.quick-share-modal .modal-container {
    max-width: 36rem;
}

/* Object Type Tabs */
.object-type-tabs {
    display: flex;
    gap: 0.25rem;
    padding: 0.25rem;
    background-color: var(--bg-secondary);
    border-radius: var(--radius-lg);
    margin-bottom: 1.5rem;
    overflow-x: auto;
}

.object-type-tab {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.375rem;
    padding: 0.75rem 1rem;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-muted);
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    min-width: 4rem;
    flex-shrink: 0;
}

.object-type-tab i {
    font-size: 1.125rem;
    transition: transform var(--transition-fast);
}

.object-type-tab:hover {
    color: var(--text-primary);
    background-color: var(--bg-hover);
}

.object-type-tab:hover i {
    transform: scale(1.1);
}

.object-type-tab.active {
    color: white;
    box-shadow: var(--shadow-sm);
}

.object-type-tab.active i {
    transform: scale(1.15);
}

/* Tab-specific active colors */
.object-type-tab[data-type="text"].active { background: var(--object-text-gradient); }
.object-type-tab[data-type="image"].active { background: var(--object-image-gradient); }
.object-type-tab[data-type="video"].active { background: var(--object-video-gradient); }
.object-type-tab[data-type="url"].active { background: var(--object-url-gradient); }
.object-type-tab[data-type="multimedia"].active { background: var(--object-multimedia-gradient); }
.object-type-tab[data-type="file"].active { background: var(--object-file-gradient); }
.object-type-tab[data-type="profile"].active { background: var(--object-profile-gradient); }
.object-type-tab[data-type="email"].active { background: var(--object-email-gradient); }

/* Content Input Areas */
.share-content-area {
    margin-bottom: 1.5rem;
}

.share-content-area.hidden {
    display: none;
}

/* Text Input */
.share-text-input {
    width: 100%;
    min-height: 8rem;
    padding: 1rem;
    font-size: 0.9375rem;
    font-family: inherit;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    border: 2px solid var(--border-primary);
    border-radius: var(--radius-md);
    resize: vertical;
    transition: all var(--transition-fast);
}

.share-text-input:focus {
    outline: none;
    border-color: var(--object-text-color);
    box-shadow: 0 0 0 3px var(--object-text-light);
}

/* URL Input */
.share-url-input-wrapper {
    display: flex;
    align-items: stretch;
    background-color: var(--bg-secondary);
    border: 2px solid var(--border-primary);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all var(--transition-fast);
}

.share-url-input-wrapper:focus-within {
    border-color: var(--object-url-color);
    box-shadow: 0 0 0 3px var(--object-url-light);
}

.share-url-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 3rem;
    background-color: var(--object-url-light);
    color: var(--object-url-color);
}

.share-url-input {
    flex: 1;
    padding: 0.875rem 1rem;
    font-size: 0.9375rem;
    font-family: inherit;
    color: var(--text-primary);
    background: transparent;
    border: none;
    outline: none;
}

/* File Upload Zone */
.share-upload-zone {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 10rem;
    padding: 2rem;
    border: 2px dashed var(--border-secondary);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: center;
}

.share-upload-zone:hover {
    border-color: var(--color-primary);
    background-color: var(--bg-hover);
}

.share-upload-zone.drag-over {
    border-color: var(--color-primary);
    border-style: solid;
    background-color: var(--color-primary-light);
}

.share-upload-zone .upload-icon {
    width: 4rem;
    height: 4rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary-50) 0%, var(--color-primary-100) 100%);
    border-radius: var(--radius-2xl);
    margin-bottom: 1rem;
}

.share-upload-zone .upload-icon i {
    font-size: 1.5rem;
    color: var(--color-primary);
}

/* Type-specific upload zones */
.share-upload-zone[data-type="image"] .upload-icon { background: linear-gradient(135deg, var(--object-image-light) 0%, rgba(16, 185, 129, 0.2) 100%); }
.share-upload-zone[data-type="image"] .upload-icon i { color: var(--object-image-color); }
.share-upload-zone[data-type="image"]:hover { border-color: var(--object-image-color); }
.share-upload-zone[data-type="image"].drag-over { background-color: var(--object-image-light); }

.share-upload-zone[data-type="video"] .upload-icon { background: linear-gradient(135deg, var(--object-video-light) 0%, rgba(139, 92, 246, 0.2) 100%); }
.share-upload-zone[data-type="video"] .upload-icon i { color: var(--object-video-color); }
.share-upload-zone[data-type="video"]:hover { border-color: var(--object-video-color); }
.share-upload-zone[data-type="video"].drag-over { background-color: var(--object-video-light); }

.share-upload-zone[data-type="file"] .upload-icon { background: linear-gradient(135deg, var(--object-file-light) 0%, rgba(107, 114, 128, 0.2) 100%); }
.share-upload-zone[data-type="file"] .upload-icon i { color: var(--object-file-color); }
.share-upload-zone[data-type="file"]:hover { border-color: var(--object-file-color); }
.share-upload-zone[data-type="file"].drag-over { background-color: var(--object-file-light); }

.share-upload-zone h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.25rem 0;
}

.share-upload-zone p {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0;
}

/* Recipient Selector */
.share-recipients-section {
    margin-bottom: 1.5rem;
}

.share-recipients-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.share-recipients-input-wrapper {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 0.5rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    min-height: 3rem;
    align-items: center;
    transition: all var(--transition-fast);
}

.share-recipients-input-wrapper:focus-within {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-focus);
}

.share-recipient-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.25rem 0.375rem 0.25rem 0.25rem;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-purple) 100%);
    border-radius: var(--radius-full);
    color: white;
    font-size: 0.8125rem;
    font-weight: 500;
}

.share-recipient-tag .tag-avatar {
    width: 1.5rem;
    height: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.5rem;
    font-weight: 600;
}

.share-recipient-tag .tag-remove {
    width: 1rem;
    height: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.2);
    border: none;
    border-radius: var(--radius-full);
    color: white;
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.share-recipient-tag .tag-remove:hover {
    background: rgba(255, 255, 255, 0.4);
}

.share-recipients-input {
    flex: 1;
    min-width: 8rem;
    padding: 0.375rem 0.5rem;
    font-size: 0.9375rem;
    font-family: inherit;
    color: var(--text-primary);
    background: transparent;
    border: none;
    outline: none;
}

/* Share Button with Gradient */
.share-submit-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    padding: 0.875rem 1.5rem;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    border: none;
    border-radius: var(--radius-lg);
    color: white;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-primary);
}

.share-submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.share-submit-btn:active {
    transform: translateY(0);
}

.share-submit-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.share-submit-btn i {
    font-size: 1rem;
}

/* ========================================
   5. OBJECT SHARING PANEL (Left Panel Layout)
   ======================================== */
.sharing-panel {
    width: var(--sharing-panel-width);
    height: 100%;
    background-color: var(--bg-primary);
    border-right: 1px solid var(--border-primary);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    overflow: hidden;
    transition: width var(--transition-slow);
}

.sharing-panel.collapsed {
    width: 0;
    padding: 0;
    overflow: hidden;
}

/* Panel Header */
.sharing-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-primary);
    flex-shrink: 0;
}

.sharing-panel-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.sharing-panel-close {
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.sharing-panel-close:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

/* Inbox/Outbox Tabs */
.sharing-tabs {
    display: flex;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-primary);
    flex-shrink: 0;
}

.sharing-tab {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1rem;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.sharing-tab:hover {
    color: var(--text-primary);
    background-color: var(--bg-hover);
}

.sharing-tab.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
    background-color: var(--bg-primary);
}

.sharing-tab i {
    font-size: 1rem;
}

.sharing-tab-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 1.25rem;
    height: 1.25rem;
    padding: 0 0.375rem;
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-full);
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--text-muted);
}

.sharing-tab.active .sharing-tab-count {
    background-color: var(--color-primary-light);
    color: var(--color-primary);
}

/* Panel Content */
.sharing-panel-content {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
}

/* Filter by Type Section */
.sharing-filter-section {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-primary);
}

.sharing-filter-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.sharing-filter-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
}

/* Compact chips for panel */
.sharing-filter-chips .object-type-chip {
    padding: 0.375rem 0.625rem;
    font-size: 0.75rem;
}

.sharing-filter-chips .object-type-chip i {
    font-size: 0.75rem;
}

/* Search Section */
.sharing-search {
    padding: 0.75rem 1.25rem;
    border-bottom: 1px solid var(--border-primary);
}

.sharing-search-input {
    width: 100%;
    padding: 0.625rem 0.875rem 0.625rem 2.5rem;
    font-size: 0.875rem;
    font-family: inherit;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.sharing-search-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: var(--shadow-focus);
}

.sharing-search-wrapper {
    position: relative;
}

.sharing-search-icon {
    position: absolute;
    left: 0.875rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 0.875rem;
    pointer-events: none;
}

/* Object List */
.sharing-object-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 1rem 1.25rem;
}

/* Compact share card for list */
.share-card-compact {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.share-card-compact:hover {
    background-color: var(--bg-hover);
    border-color: var(--border-hover);
}

.share-card-compact.selected {
    background-color: var(--color-primary-light);
    border-color: var(--color-primary);
}

.share-card-compact-icon {
    width: 2.25rem;
    height: 2.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    flex-shrink: 0;
    font-size: 0.875rem;
}

/* Type-specific compact icons */
.share-card-compact[data-type="text"] .share-card-compact-icon { background: var(--object-text-light); color: var(--object-text-color); }
.share-card-compact[data-type="image"] .share-card-compact-icon { background: var(--object-image-light); color: var(--object-image-color); }
.share-card-compact[data-type="video"] .share-card-compact-icon { background: var(--object-video-light); color: var(--object-video-color); }
.share-card-compact[data-type="url"] .share-card-compact-icon { background: var(--object-url-light); color: var(--object-url-color); }
.share-card-compact[data-type="multimedia"] .share-card-compact-icon { background: var(--object-multimedia-light); color: var(--object-multimedia-color); }
.share-card-compact[data-type="file"] .share-card-compact-icon { background: var(--object-file-light); color: var(--object-file-color); }
.share-card-compact[data-type="profile"] .share-card-compact-icon { background: var(--object-profile-light); color: var(--object-profile-color); }
.share-card-compact[data-type="email"] .share-card-compact-icon { background: var(--object-email-light); color: var(--object-email-color); }

.share-card-compact-info {
    flex: 1;
    min-width: 0;
}

.share-card-compact-title {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 0.125rem;
}

.share-card-compact-meta {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.share-card-compact-time {
    font-size: 0.6875rem;
    color: var(--text-muted);
    white-space: nowrap;
}

/* Empty State for Panel */
.sharing-empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem 1.5rem;
    text-align: center;
}

.sharing-empty-icon {
    width: 4rem;
    height: 4rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary-50) 0%, var(--color-primary-100) 100%);
    border-radius: var(--radius-2xl);
    margin-bottom: 1rem;
}

.sharing-empty-icon i {
    font-size: 1.5rem;
    color: var(--color-primary);
}

.sharing-empty-state h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.375rem 0;
}

.sharing-empty-state p {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0;
    max-width: 16rem;
}

/* ========================================
   6. ANIMATIONS
   ======================================== */
/* Chip Selection Animation */
.object-type-chip.active {
    animation: chipActivate 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes chipActivate {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

/* Share Card Appear Animation */
.share-card {
    animation: shareCardAppear 0.3s ease-out backwards;
}

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

/* Stagger animation for lists */
.sharing-object-list .share-card-compact:nth-child(1) { animation-delay: 0.02s; }
.sharing-object-list .share-card-compact:nth-child(2) { animation-delay: 0.04s; }
.sharing-object-list .share-card-compact:nth-child(3) { animation-delay: 0.06s; }
.sharing-object-list .share-card-compact:nth-child(4) { animation-delay: 0.08s; }
.sharing-object-list .share-card-compact:nth-child(5) { animation-delay: 0.10s; }

/* Activity Feed Animation */
.activity-feed-item {
    animation: activityAppear 0.25s ease-out backwards;
}

@keyframes activityAppear {
    from {
        opacity: 0;
        transform: translateX(-10px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Tab Switch Animation */
.object-type-tab.active {
    animation: tabActivate 0.2s ease-out;
}

@keyframes tabActivate {
    0% { transform: scale(0.95); }
    100% { transform: scale(1); }
}

/* ========================================
   7. RESPONSIVE STYLES
   ======================================== */
@media (max-width: 64rem) {
    :root {
        --sharing-panel-width: 20rem;
    }

    .object-type-selector {
        gap: 0.375rem;
    }

    .object-type-chip {
        padding: 0.375rem 0.75rem;
        font-size: 0.75rem;
    }
}

@media (max-width: 48rem) {
    :root {
        --sharing-panel-width: 100%;
    }

    .sharing-panel {
        position: fixed;
        left: -100%;
        top: var(--header-height);
        height: calc(100vh - var(--header-height));
        z-index: var(--z-modal);
        transition: left var(--transition-slow);
    }

    .sharing-panel.open {
        left: 0;
    }

    .object-type-tabs {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .object-type-tab {
        min-width: 3.5rem;
        padding: 0.625rem 0.75rem;
    }

    .object-type-tab span {
        display: none;
    }

    .share-card {
        flex-direction: column;
    }

    .share-card-type-bar {
        width: 100%;
        height: 4px;
    }

    .share-card:hover .share-card-type-bar {
        height: 6px;
        width: 100%;
    }
}

@media (max-width: 30rem) {
    .object-type-selector {
        gap: 0.25rem;
    }

    .object-type-chip {
        padding: 0.375rem 0.625rem;
        font-size: 0.6875rem;
    }

    .object-type-chip span {
        display: none;
    }

    .share-card-actions {
        position: static;
        opacity: 1;
        margin-top: 0.75rem;
        padding-top: 0.75rem;
        border-top: 1px solid var(--border-primary);
    }

    .activity-feed-item {
        padding: 0.625rem;
    }

    .activity-avatar {
        width: 2rem;
        height: 2rem;
    }
}

/* ========================================
   8. DARK MODE ENHANCEMENTS
   ======================================== */
[data-theme="dark"] .object-type-chip {
    background-color: var(--bg-tertiary);
}

[data-theme="dark"] .share-card {
    background-color: var(--bg-secondary);
}

[data-theme="dark"] .activity-feed-item {
    background-color: var(--bg-secondary);
}

[data-theme="dark"] .sharing-panel {
    background-color: var(--bg-secondary);
}

[data-theme="dark"] .object-type-tabs {
    background-color: var(--bg-tertiary);
}

[data-theme="dark"] .share-text-input,
[data-theme="dark"] .share-url-input-wrapper,
[data-theme="dark"] .share-recipients-input-wrapper {
    background-color: var(--bg-tertiary);
}

/* ========================================
   9. REDUCED MOTION
   ======================================== */
@media (prefers-reduced-motion: reduce) {
    .object-type-chip,
    .share-card,
    .activity-feed-item,
    .object-type-tab,
    .share-card-compact {
        animation: none !important;
    }

    .share-card-icon,
    .object-type-chip i,
    .object-type-tab i {
        transition: none !important;
    }

    .activity-indicator.unread {
        animation: none;
    }
}

/* ========================================
   10. FOCUS STYLES
   ======================================== */
.object-type-chip:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.share-card:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.activity-feed-item:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.object-type-tab:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.sharing-tab:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: -2px;
}

.share-submit-btn:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* ========================================
   11. PRINT STYLES
   ======================================== */
@media print {
    .sharing-panel,
    .share-card-actions,
    .sharing-tabs,
    .sharing-filter-section,
    .sharing-search,
    .object-type-selector {
        display: none !important;
    }

    .share-card {
        break-inside: avoid;
        page-break-inside: avoid;
    }
}

/* ========================================
   12. PAGE LAYOUT
   ======================================== */
.object-sharing-page {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background-color: var(--bg-secondary);
    overflow-x: hidden;
}

.os-page-wrapper {
    display: flex;
    flex: 1;
    width: 100%;
    max-width: 1920px;
    margin: 0 auto;
}

/* ========================================
   13. HEADER STYLES
   ======================================== */
.os-header {
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    height: 4rem;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    border-bottom: 1px solid var(--border-primary);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.os-header::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg,
        rgba(99, 102, 241, 0.03) 0%,
        rgba(139, 92, 246, 0.03) 50%,
        rgba(236, 72, 153, 0.03) 100%
    );
    pointer-events: none;
}

.os-header-left {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.os-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
}

.os-logo-icon {
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-purple) 100%);
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.os-logo-icon i {
    font-size: 1.25rem;
    color: white;
}

.os-logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.os-nav-links {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.os-nav-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.os-nav-link:hover {
    color: var(--text-primary);
    background-color: var(--bg-hover);
}

.os-nav-link.active {
    color: var(--color-primary);
    background-color: var(--color-primary-light);
}

.os-nav-link i {
    font-size: 1rem;
}

.os-header-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.os-header-search {
    position: relative;
    width: 16rem;
}

.os-header-search-input {
    width: 100%;
    padding: 0.5rem 1rem 0.5rem 2.5rem;
    font-size: 0.875rem;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

.os-header-search-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: var(--shadow-focus);
    width: 20rem;
}

.os-header-search-icon {
    position: absolute;
    left: 0.875rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 0.875rem;
    pointer-events: none;
}

.os-header-btn {
    position: relative;
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.os-header-btn:hover {
    color: var(--text-primary);
    background-color: var(--bg-hover);
}

.os-header-btn .notification-badge {
    position: absolute;
    top: 0.25rem;
    right: 0.25rem;
    width: 1rem;
    height: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-danger);
    border-radius: var(--radius-full);
    font-size: 0.625rem;
    font-weight: 600;
    color: white;
    border: 2px solid var(--bg-primary);
}

.os-profile-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 0.75rem 0.375rem 0.375rem;
    background: transparent;
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.os-profile-btn:hover {
    border-color: var(--color-primary);
    background-color: var(--bg-hover);
}

.os-profile-avatar {
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-purple) 100%);
    border-radius: var(--radius-full);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
}

.os-profile-name {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

.os-profile-btn i {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ========================================
   14. LEFT SIDEBAR - Object Types & Collections
   ======================================== */
.os-sidebar-left {
    width: 280px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-primary);
    border-right: 1px solid var(--border-primary);
    height: calc(100vh - 4rem);
    position: sticky;
    top: 4rem;
    overflow-y: auto;
    overflow-x: hidden;
    transition: width var(--transition-slow), transform var(--transition-slow);
}

.os-sidebar-left.collapsed {
    width: 0;
    transform: translateX(-100%);
}

.os-sidebar-section {
    padding: 1.25rem;
    border-bottom: 1px solid var(--border-primary);
}

.os-sidebar-section:last-child {
    border-bottom: none;
}

.os-sidebar-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.os-sidebar-title h3 {
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    margin: 0;
}

.os-sidebar-title-action {
    width: 1.5rem;
    height: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.os-sidebar-title-action:hover {
    background-color: var(--bg-hover);
    color: var(--color-primary);
}

/* Object Type Filter List */
.os-type-filter-list {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.os-type-filter-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.625rem 0.75rem;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: left;
    width: 100%;
    position: relative;
}

.os-type-filter-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 0;
    border-radius: 0 2px 2px 0;
    transition: height var(--transition-fast);
}

.os-type-filter-item:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.os-type-filter-item.active {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.os-type-filter-item.active::before {
    height: 1.5rem;
}

/* Type-specific active states */
.os-type-filter-item[data-type="all"].active::before { background: linear-gradient(135deg, var(--color-primary), var(--color-purple)); }
.os-type-filter-item[data-type="text"].active::before { background: var(--object-text-gradient); }
.os-type-filter-item[data-type="image"].active::before { background: var(--object-image-gradient); }
.os-type-filter-item[data-type="video"].active::before { background: var(--object-video-gradient); }
.os-type-filter-item[data-type="url"].active::before { background: var(--object-url-gradient); }
.os-type-filter-item[data-type="multimedia"].active::before { background: var(--object-multimedia-gradient); }
.os-type-filter-item[data-type="file"].active::before { background: var(--object-file-gradient); }
.os-type-filter-item[data-type="profile"].active::before { background: var(--object-profile-gradient); }
.os-type-filter-item[data-type="email"].active::before { background: var(--object-email-gradient); }

.os-type-filter-icon {
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    flex-shrink: 0;
    transition: transform var(--transition-fast);
}

.os-type-filter-item:hover .os-type-filter-icon {
    transform: scale(1.05);
}

/* Type-specific icon backgrounds */
.os-type-filter-item[data-type="all"] .os-type-filter-icon { background: linear-gradient(135deg, var(--color-primary-light), rgba(139, 92, 246, 0.1)); color: var(--color-primary); }
.os-type-filter-item[data-type="text"] .os-type-filter-icon { background: var(--object-text-light); color: var(--object-text-color); }
.os-type-filter-item[data-type="image"] .os-type-filter-icon { background: var(--object-image-light); color: var(--object-image-color); }
.os-type-filter-item[data-type="video"] .os-type-filter-icon { background: var(--object-video-light); color: var(--object-video-color); }
.os-type-filter-item[data-type="url"] .os-type-filter-icon { background: var(--object-url-light); color: var(--object-url-color); }
.os-type-filter-item[data-type="multimedia"] .os-type-filter-icon { background: var(--object-multimedia-light); color: var(--object-multimedia-color); }
.os-type-filter-item[data-type="file"] .os-type-filter-icon { background: var(--object-file-light); color: var(--object-file-color); }
.os-type-filter-item[data-type="profile"] .os-type-filter-icon { background: var(--object-profile-light); color: var(--object-profile-color); }
.os-type-filter-item[data-type="email"] .os-type-filter-icon { background: var(--object-email-light); color: var(--object-email-color); }

.os-type-filter-label {
    flex: 1;
}

.os-type-filter-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 1.5rem;
    height: 1.5rem;
    padding: 0 0.375rem;
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-full);
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--text-muted);
}

.os-type-filter-item.active .os-type-filter-count {
    background-color: var(--color-primary-light);
    color: var(--color-primary);
}

/* Collections List */
.os-collections-list {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.os-collection-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.625rem 0.75rem;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: left;
    width: 100%;
}

.os-collection-item:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.os-collection-item.active {
    background-color: var(--color-primary-light);
    color: var(--color-primary);
}

.os-collection-icon {
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    flex-shrink: 0;
}

.os-collection-icon.custom-color {
    background: var(--collection-color, var(--bg-tertiary));
    color: white;
}

.os-collection-name {
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.os-collection-count {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.os-add-collection-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 0.75rem;
    background: transparent;
    border: 1px dashed var(--border-secondary);
    border-radius: var(--radius-md);
    color: var(--text-muted);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    width: 100%;
    margin-top: 0.5rem;
}

.os-add-collection-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background-color: var(--color-primary-light);
}

.os-add-collection-btn i {
    font-size: 0.75rem;
}

/* ========================================
   15. MAIN CONTENT AREA
   ======================================== */
.os-main-content {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
    gap: 1.5rem;
}

/* Toolbar */
.os-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1rem 1.25rem;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
}

.os-toolbar-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.os-toolbar-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.os-toolbar-subtitle {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.os-toolbar-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* View Toggle */
.os-view-toggle {
    display: flex;
    align-items: center;
    background-color: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: 0.25rem;
}

.os-view-toggle-btn {
    width: 2.25rem;
    height: 2.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.os-view-toggle-btn:hover {
    color: var(--text-primary);
}

.os-view-toggle-btn.active {
    background-color: var(--bg-primary);
    color: var(--color-primary);
    box-shadow: var(--shadow-sm);
}

/* Sort Dropdown */
.os-sort-dropdown {
    position: relative;
}

.os-sort-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.875rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.os-sort-btn:hover {
    border-color: var(--color-primary);
    color: var(--text-primary);
}

/* New Object Button */
.os-new-object-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-purple) 100%);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.os-new-object-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.os-new-object-btn:active {
    transform: translateY(0);
}

/* Objects Grid */
.os-objects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.25rem;
    animation: contentFadeIn 0.4s ease-out;
}

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

/* Objects List View */
.os-objects-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    animation: contentFadeIn 0.4s ease-out;
}

.os-objects-list .share-card {
    flex-direction: row;
}

.os-objects-list .share-card-type-bar {
    width: 4px;
    height: auto;
}

.os-objects-list .share-card:hover .share-card-type-bar {
    width: 6px;
}

.os-objects-list .share-card-preview-image {
    width: 6rem;
    height: 4rem;
    flex-shrink: 0;
}

/* Empty State */
.os-empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4rem 2rem;
    text-align: center;
    background-color: var(--bg-primary);
    border: 2px dashed var(--border-secondary);
    border-radius: var(--radius-xl);
    animation: emptyStateAppear 0.5s ease-out;
}

@keyframes emptyStateAppear {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.os-empty-state-icon {
    width: 5rem;
    height: 5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary-light) 0%, rgba(139, 92, 246, 0.1) 100%);
    border-radius: var(--radius-2xl);
    margin-bottom: 1.5rem;
}

.os-empty-state-icon i {
    font-size: 2rem;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.os-empty-state h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
}

.os-empty-state p {
    font-size: 0.9375rem;
    color: var(--text-muted);
    margin: 0 0 1.5rem 0;
    max-width: 24rem;
}

.os-empty-state-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-purple) 100%);
    border: none;
    border-radius: var(--radius-lg);
    color: white;
    font-size: 0.9375rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.os-empty-state-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

/* ========================================
   16. RIGHT SIDEBAR - Activity Feed
   ======================================== */
.os-sidebar-right {
    width: 320px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-primary);
    border-left: 1px solid var(--border-primary);
    height: calc(100vh - 4rem);
    position: sticky;
    top: 4rem;
    overflow: hidden;
    transition: width var(--transition-slow), transform var(--transition-slow);
}

.os-sidebar-right.collapsed {
    width: 0;
    transform: translateX(100%);
}

.os-sidebar-right-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem;
    border-bottom: 1px solid var(--border-primary);
}

.os-sidebar-right-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.os-sidebar-right-actions {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.os-sidebar-action-btn {
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.os-sidebar-action-btn:hover {
    background-color: var(--bg-hover);
    color: var(--color-primary);
}

/* Activity Feed Content */
.os-activity-content {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 1rem;
}

.os-activity-date-group {
    margin-bottom: 1.5rem;
}

.os-activity-date-label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.os-activity-date-label::after {
    content: '';
    flex: 1;
    height: 1px;
    background-color: var(--border-primary);
}

.os-activity-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

/* Enhanced Activity Item */
.os-activity-item {
    display: flex;
    gap: 0.75rem;
    padding: 0.875rem;
    background-color: var(--bg-secondary);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    animation: activitySlideIn 0.3s ease-out backwards;
}

@keyframes activitySlideIn {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.os-activity-item:hover {
    background-color: var(--bg-hover);
    transform: translateX(-4px);
}

.os-activity-item.unread {
    background-color: var(--color-primary-light);
    border-left: 3px solid var(--color-primary);
}

.os-activity-avatar {
    position: relative;
    flex-shrink: 0;
}

.os-activity-avatar-img {
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-purple) 100%);
    border-radius: var(--radius-full);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
}

.os-activity-type-icon {
    position: absolute;
    bottom: -2px;
    right: -2px;
    width: 1.25rem;
    height: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    border: 2px solid var(--bg-secondary);
    font-size: 0.5rem;
    color: white;
}

/* Type-specific activity icons */
.os-activity-type-icon[data-type="text"] { background: var(--object-text-gradient); }
.os-activity-type-icon[data-type="image"] { background: var(--object-image-gradient); }
.os-activity-type-icon[data-type="video"] { background: var(--object-video-gradient); }
.os-activity-type-icon[data-type="url"] { background: var(--object-url-gradient); }
.os-activity-type-icon[data-type="multimedia"] { background: var(--object-multimedia-gradient); }
.os-activity-type-icon[data-type="file"] { background: var(--object-file-gradient); }
.os-activity-type-icon[data-type="profile"] { background: var(--object-profile-gradient); }
.os-activity-type-icon[data-type="email"] { background: var(--object-email-gradient); }

.os-activity-details {
    flex: 1;
    min-width: 0;
}

.os-activity-text {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin: 0 0 0.25rem 0;
}

.os-activity-text strong {
    color: var(--text-primary);
    font-weight: 600;
}

.os-activity-text .os-activity-object {
    font-weight: 500;
}

.os-activity-time {
    font-size: 0.6875rem;
    color: var(--text-muted);
}

/* Load More */
.os-activity-load-more {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem;
    margin-top: 0.5rem;
    background: transparent;
    border: 1px dashed var(--border-secondary);
    border-radius: var(--radius-md);
    color: var(--text-muted);
    font-size: 0.8125rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.os-activity-load-more:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background-color: var(--color-primary-light);
}

/* ========================================
   17. MODAL ENHANCEMENTS
   ======================================== */
.os-modal-overlay {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    z-index: var(--z-modal);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

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

.os-modal {
    position: relative;
    width: 100%;
    max-width: 40rem;
    max-height: calc(100vh - 2rem);
    background-color: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-2xl);
    overflow: hidden;
    transform: scale(0.95) translateY(20px);
    transition: transform var(--transition-normal);
}

.os-modal-overlay.active .os-modal {
    transform: scale(1) translateY(0);
}

/* Modal Header with Type Color Bar */
.os-modal-header {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-primary);
}

.os-modal-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
}

/* Type-specific header bars */
.os-modal[data-type="text"] .os-modal-header::before { background: var(--object-text-gradient); }
.os-modal[data-type="image"] .os-modal-header::before { background: var(--object-image-gradient); }
.os-modal[data-type="video"] .os-modal-header::before { background: var(--object-video-gradient); }
.os-modal[data-type="url"] .os-modal-header::before { background: var(--object-url-gradient); }
.os-modal[data-type="multimedia"] .os-modal-header::before { background: var(--object-multimedia-gradient); }
.os-modal[data-type="file"] .os-modal-header::before { background: var(--object-file-gradient); }
.os-modal[data-type="profile"] .os-modal-header::before { background: var(--object-profile-gradient); }
.os-modal[data-type="email"] .os-modal-header::before { background: var(--object-email-gradient); }

.os-modal-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.os-modal-title-icon {
    width: 2.25rem;
    height: 2.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    font-size: 1rem;
}

/* Type-specific title icons */
.os-modal[data-type="text"] .os-modal-title-icon { background: var(--object-text-light); color: var(--object-text-color); }
.os-modal[data-type="image"] .os-modal-title-icon { background: var(--object-image-light); color: var(--object-image-color); }
.os-modal[data-type="video"] .os-modal-title-icon { background: var(--object-video-light); color: var(--object-video-color); }
.os-modal[data-type="url"] .os-modal-title-icon { background: var(--object-url-light); color: var(--object-url-color); }
.os-modal[data-type="multimedia"] .os-modal-title-icon { background: var(--object-multimedia-light); color: var(--object-multimedia-color); }
.os-modal[data-type="file"] .os-modal-title-icon { background: var(--object-file-light); color: var(--object-file-color); }
.os-modal[data-type="profile"] .os-modal-title-icon { background: var(--object-profile-light); color: var(--object-profile-color); }
.os-modal[data-type="email"] .os-modal-title-icon { background: var(--object-email-light); color: var(--object-email-color); }

.os-modal-close {
    width: 2.25rem;
    height: 2.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.os-modal-close:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

/* Modal Body */
.os-modal-body {
    padding: 1.5rem;
    overflow-y: auto;
    max-height: calc(100vh - 12rem);
}

/* Type Tabs in Modal */
.os-type-tabs {
    display: flex;
    gap: 0.25rem;
    padding: 0.25rem;
    background-color: var(--bg-secondary);
    border-radius: var(--radius-lg);
    margin-bottom: 1.5rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.os-type-tab {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.375rem;
    padding: 0.75rem 1rem;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-muted);
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    cursor: pointer;
    transition: all var(--transition-fast);
    min-width: 4.5rem;
    flex-shrink: 0;
}

.os-type-tab i {
    font-size: 1.25rem;
    transition: transform var(--transition-fast);
}

.os-type-tab:hover {
    color: var(--text-primary);
    background-color: var(--bg-hover);
}

.os-type-tab:hover i {
    transform: scale(1.1);
}

.os-type-tab.active {
    color: white;
    box-shadow: var(--shadow-md);
}

.os-type-tab.active i {
    transform: scale(1.15);
}

/* Type-specific tab active states */
.os-type-tab[data-type="text"].active { background: var(--object-text-gradient); }
.os-type-tab[data-type="image"].active { background: var(--object-image-gradient); }
.os-type-tab[data-type="video"].active { background: var(--object-video-gradient); }
.os-type-tab[data-type="url"].active { background: var(--object-url-gradient); }
.os-type-tab[data-type="multimedia"].active { background: var(--object-multimedia-gradient); }
.os-type-tab[data-type="file"].active { background: var(--object-file-gradient); }
.os-type-tab[data-type="profile"].active { background: var(--object-profile-gradient); }
.os-type-tab[data-type="email"].active { background: var(--object-email-gradient); }

/* Form Styles */
.os-form-group {
    margin-bottom: 1.25rem;
}

.os-form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.os-form-label .required {
    color: var(--color-danger);
}

.os-form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 0.9375rem;
    font-family: inherit;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    border: 1.5px solid var(--border-primary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.os-form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

.os-form-textarea {
    min-height: 8rem;
    resize: vertical;
}

.os-form-hint {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.375rem;
}

/* Modal Footer */
.os-modal-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.75rem;
    padding: 1.25rem 1.5rem;
    border-top: 1px solid var(--border-primary);
    background-color: var(--bg-secondary);
}

.os-modal-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.os-modal-btn-secondary {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    color: var(--text-secondary);
}

.os-modal-btn-secondary:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.os-modal-btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-purple) 100%);
    border: none;
    color: white;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.os-modal-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.os-modal-btn-primary:active {
    transform: translateY(0);
}

.os-modal-btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* ========================================
   18. RESPONSIVE DESIGN - PAGE LAYOUT
   ======================================== */
@media (max-width: 1280px) {
    .os-sidebar-right {
        width: 280px;
    }

    .os-objects-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }
}

@media (max-width: 1024px) {
    .os-sidebar-left {
        position: fixed;
        left: 0;
        top: 4rem;
        z-index: calc(var(--z-modal) - 1);
        transform: translateX(-100%);
        box-shadow: var(--shadow-xl);
    }

    .os-sidebar-left.open {
        transform: translateX(0);
    }

    .os-sidebar-right {
        position: fixed;
        right: 0;
        top: 4rem;
        z-index: calc(var(--z-modal) - 1);
        transform: translateX(100%);
        box-shadow: var(--shadow-xl);
    }

    .os-sidebar-right.open {
        transform: translateX(0);
    }

    .os-header-search {
        width: 12rem;
    }

    .os-header-search-input:focus {
        width: 14rem;
    }

    .os-nav-links {
        display: none;
    }
}

@media (max-width: 768px) {
    .os-header {
        padding: 0 1rem;
        height: 3.5rem;
    }

    .os-logo-text {
        display: none;
    }

    .os-header-search {
        display: none;
    }

    .os-profile-name {
        display: none;
    }

    .os-main-content {
        padding: 1rem;
    }

    .os-toolbar {
        flex-direction: column;
        align-items: stretch;
        gap: 0.75rem;
        padding: 0.875rem;
    }

    .os-toolbar-left {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .os-toolbar-right {
        justify-content: space-between;
    }

    .os-objects-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .os-sidebar-left,
    .os-sidebar-right {
        width: 100%;
        max-width: 320px;
    }

    .os-modal {
        max-width: 100%;
        max-height: 100vh;
        border-radius: 0;
    }

    .os-modal-overlay {
        padding: 0;
    }

    .os-type-tabs {
        padding: 0.125rem;
    }

    .os-type-tab {
        padding: 0.5rem 0.75rem;
        min-width: 3.5rem;
    }

    .os-type-tab span {
        display: none;
    }
}

@media (max-width: 480px) {
    .os-header {
        padding: 0 0.75rem;
    }

    .os-header-left {
        gap: 0.75rem;
    }

    .os-logo-icon {
        width: 2rem;
        height: 2rem;
    }

    .os-logo-icon i {
        font-size: 1rem;
    }

    .os-header-btn {
        width: 2.25rem;
        height: 2.25rem;
    }

    .os-profile-btn {
        padding: 0.25rem;
    }

    .os-profile-avatar {
        width: 1.75rem;
        height: 1.75rem;
    }

    .os-main-content {
        padding: 0.75rem;
        gap: 0.75rem;
    }

    .os-toolbar {
        padding: 0.75rem;
    }

    .os-empty-state {
        padding: 2rem 1rem;
    }

    .os-empty-state-icon {
        width: 4rem;
        height: 4rem;
    }

    .os-empty-state-icon i {
        font-size: 1.5rem;
    }

    .os-modal-body {
        padding: 1rem;
    }

    .os-modal-footer {
        padding: 1rem;
        flex-direction: column;
    }

    .os-modal-btn {
        width: 100%;
    }
}

/* Touch-friendly controls */
@media (hover: none) and (pointer: coarse) {
    .os-type-filter-item,
    .os-collection-item,
    .os-activity-item {
        padding: 0.875rem;
    }

    .share-card-actions {
        opacity: 1;
    }

    .os-view-toggle-btn {
        width: 2.75rem;
        height: 2.75rem;
    }

    .os-header-btn {
        width: 2.75rem;
        height: 2.75rem;
    }
}

/* ========================================
   19. DARK MODE - PAGE LAYOUT
   ======================================== */
[data-theme="dark"] .os-header {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
}

[data-theme="dark"] .os-header::before {
    background: linear-gradient(90deg,
        rgba(99, 102, 241, 0.05) 0%,
        rgba(139, 92, 246, 0.05) 50%,
        rgba(236, 72, 153, 0.05) 100%
    );
}

[data-theme="dark"] .os-sidebar-left,
[data-theme="dark"] .os-sidebar-right {
    background-color: var(--bg-secondary);
}

[data-theme="dark"] .os-toolbar {
    background-color: var(--bg-secondary);
}

[data-theme="dark"] .os-empty-state {
    background-color: var(--bg-secondary);
    border-color: var(--border-secondary);
}

[data-theme="dark"] .os-modal {
    background-color: var(--bg-secondary);
}

[data-theme="dark"] .os-modal-footer {
    background-color: var(--bg-tertiary);
}

[data-theme="dark"] .os-activity-item {
    background-color: var(--bg-tertiary);
}

[data-theme="dark"] .os-activity-item:hover {
    background-color: var(--bg-hover);
}

[data-theme="dark"] .os-activity-item.unread {
    background-color: rgba(99, 102, 241, 0.15);
}

[data-theme="dark"] .os-type-tabs {
    background-color: var(--bg-tertiary);
}

[data-theme="dark"] .os-form-input {
    background-color: var(--bg-tertiary);
}

[data-theme="dark"] .os-header-search-input {
    background-color: var(--bg-tertiary);
}

[data-theme="dark"] .os-view-toggle {
    background-color: var(--bg-tertiary);
}

[data-theme="dark"] .os-sort-btn {
    background-color: var(--bg-tertiary);
}

/* Dark mode gradient adjustments */
[data-theme="dark"] .os-logo-icon {
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

[data-theme="dark"] .os-new-object-btn {
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

[data-theme="dark"] .os-modal-btn-primary {
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

/* ========================================
   20. PAGE LOAD & TRANSITION ANIMATIONS
   ======================================== */
.os-page-enter {
    animation: pageEnter 0.5s ease-out;
}

@keyframes pageEnter {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.os-sidebar-enter-left {
    animation: sidebarEnterLeft 0.4s ease-out;
}

@keyframes sidebarEnterLeft {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.os-sidebar-enter-right {
    animation: sidebarEnterRight 0.4s ease-out;
}

@keyframes sidebarEnterRight {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.os-header-enter {
    animation: headerEnter 0.4s ease-out;
}

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

/* Staggered card animations */
.os-objects-grid .share-card:nth-child(1) { animation-delay: 0.05s; }
.os-objects-grid .share-card:nth-child(2) { animation-delay: 0.1s; }
.os-objects-grid .share-card:nth-child(3) { animation-delay: 0.15s; }
.os-objects-grid .share-card:nth-child(4) { animation-delay: 0.2s; }
.os-objects-grid .share-card:nth-child(5) { animation-delay: 0.25s; }
.os-objects-grid .share-card:nth-child(6) { animation-delay: 0.3s; }

/* Staggered activity feed animations */
.os-activity-list .os-activity-item:nth-child(1) { animation-delay: 0.05s; }
.os-activity-list .os-activity-item:nth-child(2) { animation-delay: 0.1s; }
.os-activity-list .os-activity-item:nth-child(3) { animation-delay: 0.15s; }
.os-activity-list .os-activity-item:nth-child(4) { animation-delay: 0.2s; }
.os-activity-list .os-activity-item:nth-child(5) { animation-delay: 0.25s; }

/* Card hover effects */
.share-card {
    position: relative;
    overflow: hidden;
}

.share-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        135deg,
        rgba(255, 255, 255, 0) 0%,
        rgba(255, 255, 255, 0.1) 50%,
        rgba(255, 255, 255, 0) 100%
    );
    transform: translateX(-100%);
    transition: transform 0.6s ease;
    pointer-events: none;
}

.share-card:hover::after {
    transform: translateX(100%);
}

[data-theme="dark"] .share-card::after {
    background: linear-gradient(
        135deg,
        rgba(255, 255, 255, 0) 0%,
        rgba(255, 255, 255, 0.05) 50%,
        rgba(255, 255, 255, 0) 100%
    );
}

/* Modal animations */
.os-modal-overlay {
    animation: modalOverlayIn 0.3s ease-out;
}

@keyframes modalOverlayIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.os-modal {
    animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: scale(0.9) translateY(20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    .os-page-enter,
    .os-sidebar-enter-left,
    .os-sidebar-enter-right,
    .os-header-enter,
    .os-modal-overlay,
    .os-modal,
    .os-activity-item,
    .os-objects-grid,
    .os-empty-state {
        animation: none !important;
    }

    .share-card::after {
        display: none;
    }

    .os-modal-overlay.active .os-modal {
        transform: none;
    }
}

/* ========================================
   21. FOCUS STYLES - PAGE LAYOUT
   ======================================== */
.os-nav-link:focus-visible,
.os-header-btn:focus-visible,
.os-profile-btn:focus-visible,
.os-type-filter-item:focus-visible,
.os-collection-item:focus-visible,
.os-add-collection-btn:focus-visible,
.os-view-toggle-btn:focus-visible,
.os-sort-btn:focus-visible,
.os-new-object-btn:focus-visible,
.os-sidebar-action-btn:focus-visible,
.os-activity-item:focus-visible,
.os-activity-load-more:focus-visible,
.os-modal-close:focus-visible,
.os-type-tab:focus-visible,
.os-modal-btn:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.os-header-search-input:focus-visible,
.os-form-input:focus-visible {
    outline: none;
}

/* ========================================
   22. UTILITY CLASSES
   ======================================== */
.os-hidden {
    display: none !important;
}

.os-visible {
    display: block !important;
}

.os-flex {
    display: flex !important;
}

.os-sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Sidebar overlay for mobile */
.os-sidebar-overlay {
    position: fixed;
    inset: 0;
    top: 4rem;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: calc(var(--z-modal) - 2);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.os-sidebar-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Mobile menu toggle */
.os-mobile-menu-btn {
    display: none;
    width: 2.5rem;
    height: 2.5rem;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.os-mobile-menu-btn:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

@media (max-width: 1024px) {
    .os-mobile-menu-btn {
        display: flex;
    }
}