.messages-container {
    flex: 1;
    overflow-y: auto;
    padding: 12px 16px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    -webkit-overflow-scrolling: touch;
    position: relative;
    background:
        radial-gradient(circle at 50% 30%, rgba(59,130,246,0.04) 0%, transparent 50%),
        radial-gradient(circle at 20% 80%, rgba(139,92,246,0.03) 0%, transparent 40%),
        radial-gradient(circle at 80% 20%, rgba(59,130,246,0.02) 0%, transparent 40%);
}

.messages-container::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.015) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.015) 1px, transparent 1px);
    background-size: 24px 24px;
    pointer-events: none;
}

.messages-container::-webkit-scrollbar {
    width: 4px;
}

.messages-container::-webkit-scrollbar-track {
    background: transparent;
}

.messages-container::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 2px;
}

.messages-container::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

.message {
    display: flex;
    gap: 8px;
    max-width: 78%;
    animation: messageIn 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
}

@keyframes messageIn {
    from { opacity: 0; transform: translateY(8px) scale(0.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

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

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

.message.date-divider {
    align-self: center;
    max-width: 100%;
    margin: 16px 0 12px;
}

.message.date-divider span {
    background: var(--bg-tertiary);
    padding: 5px 14px;
    border-radius: 12px;
    font-size: 11px;
    color: var(--text-muted);
    font-weight: 500;
    border: 1px solid var(--border);
}

.message-avatar {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    flex-shrink: 0;
    box-shadow: 0 0 0 1px rgba(255,255,255,0.05);
}

.message-content {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.message.outgoing .message-content {
    align-items: flex-end;
}

.message-sender {
    font-size: 11px;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 1px;
    padding: 0 4px;
    letter-spacing: 0.2px;
}

.message-reply {
    font-size: 11px;
    color: var(--text-muted);
    padding: 5px 10px;
    background: rgba(255,255,255,0.03);
    border-radius: var(--radius-sm);
    border-left: 2px solid var(--accent);
    margin-bottom: 4px;
    max-width: 220px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.message-bubble {
    padding: 9px 14px;
    border-radius: var(--radius-lg);
    line-height: 1.45;
    word-wrap: break-word;
    position: relative;
}

.message.incoming .message-bubble {
    background: var(--message-incoming);
    border: 1px solid var(--message-incoming-border);
    border-bottom-left-radius: 4px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.3), inset 0 1px 0 rgba(255,255,255,0.02);
}

.message.outgoing .message-bubble {
    background: linear-gradient(135deg, var(--message-outgoing-start), var(--message-outgoing-end));
    border-bottom-right-radius: 4px;
    color: #fff;
    box-shadow: 0 4px 12px rgba(29,78,216,0.35), inset 0 1px 0 rgba(255,255,255,0.1);
}

.message-bubble p {
    font-size: 14px;
    margin: 0;
    overflow: hidden;
}

.message-bubble code {
    background: rgba(255,255,255,0.08);
    padding: 1px 5px;
    border-radius: 4px;
    font-size: 12px;
    font-family: 'SF Mono', 'Fira Code', monospace;
}

.message-bubble pre {
    background: rgba(0,0,0,0.3);
    padding: 10px 12px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 6px 0;
    border: 1px solid var(--border);
}

.message-bubble pre code {
    background: none;
    padding: 0;
    font-size: 12px;
    line-height: 1.5;
}

.message-bubble blockquote {
    border-left: 3px solid var(--accent);
    padding: 4px 12px;
    margin: 4px 0;
    color: var(--text-secondary);
    font-style: italic;
    background: rgba(59,130,246,0.04);
    border-radius: 0 6px 6px 0;
}

.message-bubble p:not(:last-child) {
    margin-bottom: 2px;
}

.message-bubble > .message-meta {
    display: flex;
    align-items: center;
    gap: 3px;
    float: right;
    margin: 3px 0 0 8px;
}

.message-meta {
    display: flex;
    align-items: center;
    gap: 3px;
}

.message-time {
    font-size: 10px;
    color: var(--text-muted);
    font-weight: 500;
}

.message.outgoing .message-time {
    color: rgba(255,255,255,0.55);
}

.message-status {
    width: 14px;
    height: 14px;
    color: var(--text-muted);
}

.message-status.read {
    color: var(--accent);
}

.message.outgoing .message-status {
    color: rgba(255,255,255,0.45);
}

.message.outgoing .message-status.read {
    color: #93c5fd;
}

.message-selector {
    width: 20px;
    height: 20px;
    border: 2px solid var(--text-muted);
    border-radius: 50%;
    display: none;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    cursor: pointer;
    transition: all 0.15s ease;
    margin: auto 4px;
}

.select-mode-active .message-selector {
    display: flex;
}

.message-selector.checked {
    background: var(--accent);
    border-color: var(--accent);
    box-shadow: 0 0 12px var(--accent-glow);
}

.message-selector.checked::after {
    content: '';
    width: 8px;
    height: 8px;
    background: white;
    border-radius: 50%;
}

.message.grouped {
    margin-top: -4px;
}

.message.grouped .message-avatar {
    visibility: hidden;
}

.message.search-match {
    background: rgba(59, 130, 246, 0.1);
    border-radius: 8px;
}

.search-highlight {
    background: rgba(255, 255, 0, 0.4);
    padding: 2px 4px;
    border-radius: 3px;
}

.pinned-mark, .bookmarked-mark {
    display: inline-flex;
    vertical-align: middle;
    margin-left: 4px;
}

.pinned-mark { color: var(--accent); opacity: 0.6; }
.bookmarked-mark { color: #f59e0b; opacity: 0.7; }

.message.pinned {
    background: rgba(59, 130, 246, 0.05);
    border-left: 3px solid var(--accent);
    padding-left: 8px;
}

.message.bookmarked {
    border-left: 3px solid #f59e0b;
    padding-left: 8px;
}

.scroll-to-bottom-btn {
    position: absolute;
    bottom: 100px;
    right: 20px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--surface);
    border: 1px solid var(--border);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: all 0.2s ease;
    z-index: 10;
}

.scroll-to-bottom-btn.visible {
    opacity: 1;
    pointer-events: auto;
}

.scroll-to-bottom-btn:hover {
    background: var(--surface-hover);
    transform: translateY(-2px);
}

.scroll-to-bottom-btn svg {
    width: 20px;
    height: 20px;
    color: var(--text-secondary);
}

.chat-search-panel {
    display: none;
    padding: 8px 16px;
    background: var(--surface);
    border-top: 1px solid var(--border);
    align-items: center;
    gap: 8px;
}

.chat-search-panel.active {
    display: flex;
}

.chat-search-input {
    flex: 1;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 8px 16px;
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
}

.chat-search-input:focus {
    border-color: var(--accent);
}

.chat-search-count {
    font-size: 12px;
    color: var(--text-secondary);
    min-width: 40px;
    text-align: center;
}

.chat-search-close {
    width: 32px;
    height: 32px;
}

.floating-date {
    position: absolute;
    top: 12px;
    left: 50%;
    transform: translateX(-50%);
    padding: 4px 16px;
    border-radius: 20px;
    background: var(--accent);
    color: white;
    font-size: 12px;
    font-weight: 600;
    white-space: nowrap;
    pointer-events: none;
    z-index: 15;
    opacity: 0;
    transition: opacity 0.25s ease;
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

.floating-date.visible {
    opacity: 1;
}

.messages-container.compact-mode {
    gap: 2px;
    padding: 8px 12px;
}

.messages-container.compact-mode .message {
    max-width: 88%;
}

.messages-container.compact-mode .message-bubble {
    padding: 6px 10px;
    border-radius: 10px;
}

.messages-container.compact-mode .message-bubble p {
    font-size: 13px;
}

.messages-container.compact-mode .message-meta {
    margin-top: 1px;
}

.messages-container.compact-mode .message-avatar {
    width: 24px;
    height: 24px;
    font-size: 10px !important;
}

.messages-container.compact-mode .message.grouped {
    margin-top: -2px;
}

.messages-container.compact-mode .date-divider {
    margin: 10px 0 8px;
}

.messages-container.compact-mode .message-image {
    max-width: 180px;
}

.empty-chat {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 60px 20px;
    text-align: center;
    opacity: 0.5;
    user-select: none;
}

.empty-chat-icon {
    width: 48px;
    height: 48px;
    color: var(--text-muted);
    opacity: 0.4;
}

.empty-chat-text {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
}

.empty-chat-sub {
    font-size: 12px;
    color: var(--text-muted);
}