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

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

.chat-back-button {
    margin-right: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    border: none;
    background: none;
    color: var(--color-text);
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.chat-back-button:hover {
    background-color: var(--color-bg-secondary);
}

.chat-partner {
    display: flex;
    align-items: center;
    flex: 1;
}

.chat-partner-avatar {
    width: 45px;
    height: 45px;
    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;
    margin-right: var(--spacing-md);
    flex-shrink: 0;
}

.chat-partner-info {
    flex: 1;
    min-width: 0;
}

.chat-partner-name {
    font-weight: 600;
    font-size: var(--text-base);
    margin-bottom: 2px;
}

.chat-partner-status {
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
    display: flex;
    align-items: center;
}

.status-indicator {
    width: 8px;
    height: 8px;
    border-radius: var(--radius-full);
    margin-right: 4px;
}

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

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

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

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.message-date {
    text-align: center;
    color: var(--color-text-tertiary);
    font-size: var(--text-xs);
    margin: var(--spacing-md) 0;
    position: relative;
}

.message-date::before,
.message-date::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 30%;
    height: 1px;
    background-color: var(--color-border);
}

.message-date::before {
    left: 0;
}

.message-date::after {
    right: 0;
}

.message {
    display: flex;
    max-width: 80%;
    animation: messageAppear 0.3s ease-out;
}

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

.message.incoming {
    align-self: flex-start;
}

.message.outgoing {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.message-avatar {
    width: 35px;
    height: 35px;
    border-radius: var(--radius-full);
    background-color: var(--color-bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-sm);
    font-weight: 600;
    margin: 0 var(--spacing-sm);
    flex-shrink: 0;
    align-self: flex-end;
}

.message.outgoing .message-avatar {
    margin: 0 0 0 var(--spacing-sm);
}

.message-content {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.message-bubble {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-lg);
    position: relative;
    word-break: break-word;
}

.message.incoming .message-bubble {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-top-left-radius: var(--radius-sm);
}

.message.outgoing .message-bubble {
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
    border-top-right-radius: var(--radius-sm);
}

.message-text {
    font-size: var(--text-base);
    line-height: var(--line-height-normal);
}

.message-time {
    font-size: var(--text-xs);
    opacity: 0.7;
    align-self: flex-end;
}

.message.incoming .message-time {
    color: var(--color-text-tertiary);
}

.message.outgoing .message-time {
    color: rgba(255, 255, 255, 0.8);
}

.message-status {
    font-size: 12px;
    margin-left: 4px;
}

.message-actions {
    display: flex;
    gap: var(--spacing-xs);
    margin-top: 4px;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.message:hover .message-actions {
    opacity: 1;
}

.chat-input-area {
    padding: var(--spacing-md);
    background-color: var(--color-surface);
    border-top: 1px solid var(--color-border);
    position: sticky;
    bottom: 0;
}

.input-wrapper {
    display: flex;
    gap: var(--spacing-sm);
    align-items: flex-end;
}

.chat-input {
    flex: 1;
    min-height: 44px;
    max-height: 120px;
    resize: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-lg);
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    font-size: var(--text-base);
    font-family: var(--font-sans);
    line-height: var(--line-height-normal);
}

.chat-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

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

.input-action-button {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    border: none;
    background: none;
    color: var(--color-text);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color var(--transition-fast);
}

.input-action-button:hover {
    background-color: var(--color-bg-secondary);
}

.input-action-button.primary {
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
}

.input-action-button.primary:hover {
    background-color: var(--color-primary-dark);
}

.attachment-preview {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    overflow-x: auto;
    padding: var(--spacing-xs);
}

.attachment-item {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-md);
    background-color: var(--color-bg-secondary);
    position: relative;
    flex-shrink: 0;
}

.attachment-remove {
    position: absolute;
    top: -8px;
    right: -8px;
    width: 24px;
    height: 24px;
    border-radius: var(--radius-full);
    background-color: var(--color-danger);
    color: var(--color-text-inverse);
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    cursor: pointer;
}

/* Typing indicator */
.typing-indicator {
    display: flex;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    align-self: flex-start;
    margin-bottom: var(--spacing-sm);
}

.typing-dots {
    display: flex;
    gap: 4px;
}

.typing-dot {
    width: 8px;
    height: 8px;
    border-radius: var(--radius-full);
    background-color: var(--color-text-tertiary);
    animation: typingDot 1.4s infinite;
}

.typing-dot:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-dot:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typingDot {
    0%, 60%, 100% {
        transform: translateY(0);
    }
    30% {
        transform: translateY(-6px);
    }
}

/* Responsive adjustments */
@media (min-width: 768px) {
    .chat-screen {
        max-width: 600px;
        margin: 0 auto;
        border-left: 1px solid var(--color-border);
        border-right: 1px solid var(--color-border);
    }
    
    .message {
        max-width: 70%;
    }
}

@media (min-width: 1024px) {
    .chat-screen {
        max-width: 800px;
    }
    
    .message {
        max-width: 65%;
    }
}

/* Scrollbar styling */
.chat-messages::-webkit-scrollbar {
    width: 6px;
}

.chat-messages::-webkit-scrollbar-track {
    background: var(--color-bg-secondary);
}

.chat-messages::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: var(--radius-full);
}

.chat-messages::-webkit-scrollbar-thumb:hover {
    background: var(--color-border-dark);
}