/* Chat list screen styles */
.chat-list-screen {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background-color: var(--color-bg);
}

.chat-list-header {
    padding: var(--spacing-md);
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.header-title {
    font-size: var(--text-2xl);
    font-weight: 700;
}

.header-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.search-container {
    position: relative;
    margin-bottom: var(--spacing-md);
}

.search-input {
    padding-left: var(--spacing-xl);
    background-color: var(--color-bg-secondary);
}

.search-icon {
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-tertiary);
    pointer-events: none;
}

.chat-list-container {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md);
}

.chat-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.chat-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    transition: all var(--transition-fast);
    cursor: pointer;
    text-decoration: none;
    color: inherit;
}

.chat-item:hover {
    background-color: var(--color-bg-secondary);
    border-color: var(--color-primary);
    transform: translateX(4px);
}

.chat-item.active {
    background-color: var(--color-bg-tertiary);
    border-color: var(--color-primary);
}

.chat-avatar {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-full);
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: var(--text-lg);
    margin-right: var(--spacing-md);
    flex-shrink: 0;
}

.chat-info {
    flex: 1;
    min-width: 0; /* Allow text truncation */
}

.chat-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: var(--spacing-xs);
}

.chat-name {
    font-weight: 600;
    font-size: var(--text-base);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-time {
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
    flex-shrink: 0;
    margin-left: var(--spacing-sm);
}

.chat-preview {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.chat-last-message {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
}

.chat-unread {
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
    font-size: var(--text-xs);
    font-weight: 600;
    padding: 2px 6px;
    border-radius: var(--radius-full);
    margin-left: var(--spacing-sm);
    min-width: 20px;
    text-align: center;
    flex-shrink: 0;
}

.chat-status {
    width: 10px;
    height: 10px;
    border-radius: var(--radius-full);
    margin-left: var(--spacing-sm);
    flex-shrink: 0;
}

.chat-status.online {
    background-color: var(--color-success);
}

.chat-status.away {
    background-color: var(--color-warning);
}

.chat-status.offline {
    background-color: var(--color-border);
}

.chat-list-footer {
    padding: var(--spacing-md);
    background-color: var(--color-surface);
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: space-around;
}

.footer-tab {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-sm);
    border: none;
    background: none;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: color var(--transition-fast);
    font-size: var(--text-xs);
}

.footer-tab:hover {
    color: var(--color-primary);
}

.footer-tab.active {
    color: var(--color-primary);
}

.footer-icon {
    font-size: 1.5rem;
    margin-bottom: 4px;
}

/* Empty state */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl);
    text-align: center;
    color: var(--color-text-secondary);
}

.empty-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.5;
}

/* Responsive adjustments */
@media (min-width: 768px) {
    .chat-list-screen {
        max-width: 600px;
        margin: 0 auto;
        border-left: 1px solid var(--color-border);
        border-right: 1px solid var(--color-border);
    }
    
    .chat-list-footer {
        display: none; /* Desktop uses top navigation */
    }
}

@media (min-width: 1024px) {
    .chat-list-screen {
        max-width: 400px;
        border-right: 1px solid var(--color-border);
    }
}

/* Loading skeleton */
.skeleton {
    background: linear-gradient(90deg, var(--color-bg-secondary) 25%, var(--color-bg-tertiary) 50%, var(--color-bg-secondary) 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

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