/* ============================================================
   chat.css — 对话节点新拟态设计
   ============================================================ */

.chat-container {
    display: flex;
    flex-direction: column;
    height: 100%;
    width: 100%;
    gap: 10px;
    padding: 0;
    box-sizing: border-box;
    min-width: 0;
    overflow: hidden;
    background: transparent;
}

/* 顶部配置栏 */
.chat-config-bar {
    position: relative;
    z-index: 3;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
    padding: 8px 10px;
    border-radius: var(--chat-panel-radius);
    background: var(--chat-panel-bg);
    border: var(--chat-panel-border);
    box-shadow: var(--chat-panel-shadow);
    overflow: visible;
    min-height: 42px;
}
.chat-config-bar .model-selector {
    max-width: 360px;
    flex: 1 1 auto;
    min-width: 120px;
}
.chat-history-wrap {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 8px;
    border-radius: 8px;
    background: var(--chat-panel-bg);
    box-shadow: var(--chat-bubble-shadow);
    font-size: 12px;
    white-space: nowrap;
    flex-shrink: 0;
}
.chat-history-label {
    color: var(--text-muted);
    font-size: 11px;
    font-weight: 500;
}
.chat-history-count {
    width: 38px;
    padding: 3px 6px;
    border: none;
    border-radius: 8px;
    outline: none;
    text-align: center;
    background: var(--chat-bubble-bg);
    box-shadow: var(--chat-bubble-shadow);
    color: var(--text);
    font-size: 12px;
    font-weight: 600;
    box-sizing: border-box;
    transition: box-shadow var(--duration-normal), transform var(--duration-fast);
}
.chat-history-count:hover {
    box-shadow: var(--neu-shadow-hover);
    transform: translateY(-1px);
}
.chat-history-count:focus {
    box-shadow: var(--neu-shadow), 0 0 0 2px color-mix(in srgb, var(--accent) 20%, transparent);
    transform: translateY(0);
}

/* 消息列表 */
.chat-list {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 12px 10px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    background: var(--chat-panel-bg);
    box-shadow: var(--chat-panel-shadow);
    border: var(--chat-panel-border);
    border-radius: var(--chat-panel-radius);
    min-height: 120px;
    pointer-events: auto;
}
/* 滚动条样式已在 node.css 统一定义 */

/* 消息行 */
.chat-msg {
    display: flex;
    gap: 8px;
    max-width: 92%;
    pointer-events: auto;
}
.chat-msg.user { align-self: flex-end; flex-direction: row-reverse; }
.chat-msg.ai { align-self: flex-start; }
.chat-msg.system { align-self: center; max-width: 100%; }

/* 头像 */
.chat-avatar {
    width: 28px; height: 28px;
    border-radius: 50%;
    background: var(--node-neu-surface);
    box-shadow: var(--neu-shadow);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    flex-shrink: 0;
}
.chat-msg.user .chat-avatar {
    background: color-mix(in srgb, var(--type-chat) 12%, var(--node-neu-surface));
}

/* 消息体 */
.chat-msg-body {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 0;
}
.chat-msg.user .chat-msg-body { align-items: flex-end; }
.chat-msg-meta {
    font-size: 10px;
    color: var(--text-muted);
    display: flex;
    gap: 5px;
    align-items: center;
    padding: 0 4px;
}

/* 气泡 — 新拟态风格 */
.chat-bubble {
    padding: 10px 12px;
    border-radius: 14px;
    font-size: 13px;
    line-height: 1.6;
    color: var(--chat-bubble-text);
    word-break: break-word;
    user-select: text;
    min-width: 64px;
    pointer-events: auto;
    background: var(--node-neu-surface);
    box-shadow: var(--neu-shadow);
}
.chat-bubble-text { white-space: pre-wrap; }

/* 用户气泡 — 凸起 + 类型色 */
.chat-msg.user .chat-bubble {
    background: var(--chat-user-bubble-bg);
    box-shadow: var(--chat-bubble-shadow);
    color: var(--text);
    border-top-right-radius: 4px;
}
/* AI 气泡 — 内凹 */
.chat-msg.ai .chat-bubble {
    background: var(--chat-ai-bubble-bg);
    box-shadow: var(--chat-ai-bubble-shadow);
    border-top-left-radius: 4px;
}
/* 系统消息 */
.chat-msg.system .chat-bubble {
    background: color-mix(in srgb, var(--danger) 8%, var(--node-neu-surface));
    box-shadow: var(--neu-inset);
    color: var(--danger);
    font-size: 12px;
    padding: 6px 10px;
    text-align: center;
    border-radius: 10px;
    min-width: 0;
}
.chat-msg.system.chat-typing .chat-bubble {
    background: transparent;
    box-shadow: none;
    color: var(--text-muted);
}

/* 气泡操作按钮 */
.chat-bubble-wrap { position: relative; max-width: 100%; }
.chat-bubble-actions {
    position: absolute; top: -8px; right: 8px;
    display: flex; gap: 5px;
    opacity: 0; transform: translateY(4px);
    pointer-events: none;
    transition: opacity var(--duration-fast), transform var(--duration-fast);
    z-index: 2;
}
.chat-msg.user .chat-bubble-actions { right: auto; left: 8px; }
.chat-bubble-wrap:hover .chat-bubble-actions,
.chat-bubble-wrap:focus-within .chat-bubble-actions {
    opacity: 1; transform: translateY(0); pointer-events: auto;
}
.chat-bubble-action {
    width: 26px; height: 26px;
    border: none;
    border-radius: 50%;
    background: var(--node-neu-surface);
    box-shadow: var(--neu-shadow);
    color: var(--text-muted);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: transform var(--duration-fast), color var(--duration-fast), box-shadow var(--duration-fast);
}
.chat-bubble-action:hover {
    transform: translateY(-1px);
    color: var(--accent);
    box-shadow: var(--neu-shadow-hover);
}
.chat-bubble-action:active { box-shadow: var(--neu-inset); transform: translateY(0); }
.chat-bubble-action .svg-icon { width: 13px; height: 13px; }

/* 气泡图片 */
.chat-bubble-media { margin-top: 8px; }
.chat-bubble-image {
    display: block;
    width: min(100%, 220px);
    max-height: 220px;
    object-fit: cover;
    border-radius: 12px;
    box-shadow: var(--neu-shadow);
    cursor: pointer;
}

/* 输入区域 */
.chat-input-area {
    display: flex;
    width: 100%; min-width: 0;
    gap: 8px;
    flex-shrink: 0;
    align-items: stretch;
    padding: 8px;
    box-sizing: border-box;
    overflow: hidden;
    border-radius: 14px;
    background: var(--node-neu-surface);
    box-shadow: var(--neu-inset);
    pointer-events: auto;
}
.chat-textarea {
    flex: 1;
    min-height: 40px; max-height: 120px;
    resize: none;
    border: none;
    border-radius: 10px;
    padding: 10px 12px;
    font-size: 13px;
    line-height: 1.5;
    outline: none;
    background: var(--surface);
    box-shadow: var(--neu-inset);
    font-family: inherit;
    box-sizing: border-box;
    color: var(--text);
    transition: box-shadow var(--duration-fast);
}
.chat-textarea:focus {
    box-shadow: var(--neu-inset-deep), 0 0 0 2px color-mix(in srgb, var(--accent) 18%, transparent);
}
.chat-rich-input {
    margin-top: 0;
    min-width: 0;
    min-height: 42px;
    max-height: 132px;
    background: var(--surface);
    box-shadow: var(--neu-inset);
    border-radius: 10px;
    border: none;
    border-color: transparent;
    flex: 1 1 auto;
    padding: 10px 12px;
}
.chat-rich-input:focus {
    background: var(--surface);
    box-shadow: var(--neu-inset-deep), 0 0 0 2px color-mix(in srgb, var(--accent) 18%, transparent);
}

/* 发送按钮 — 新拟态凸起 */
.chat-send-btn {
    background: var(--node-neu-surface);
    box-shadow: var(--neu-shadow);
    color: var(--text);
    border: none;
    border-radius: 12px;
    min-width: 64px;
    flex: 0 0 64px;
    min-height: 42px;
    align-self: stretch;
    cursor: pointer;
    font-weight: 700;
    font-size: 13px;
    transition: box-shadow var(--duration-normal), transform var(--duration-fast), color var(--duration-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    white-space: nowrap;
}
.chat-send-btn:hover {
    box-shadow: var(--neu-shadow-hover);
    transform: translateY(-1px);
    color: var(--accent);
}
.chat-send-btn:active {
    box-shadow: var(--neu-inset);
    transform: translateY(0);
}
.chat-send-btn:disabled {
    box-shadow: var(--neu-inset);
    cursor: not-allowed;
    opacity: 0.5;
    color: var(--text-muted);
    transform: none;
}