/* ====================================
   Phase 3: 聊天消息操作按钮样式
   ==================================== */

/**
 * Phase 3 优化：将所有内联 hover 效果迁移到 CSS
 * 目标：减少内联样式，提升渲染性能和代码可维护性
 */

/* ==========================================
   基础按钮样式
   ========================================== */

.msg-action-btn {
    background: rgba(0, 0, 0, 0.05);
    border: none;
    width: 22px;
    height: 22px;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    transition: all 0.2s ease;
    margin-left: 4px;
}

.msg-action-btn:first-child {
    margin-left: 0;
}

/* ==========================================
   删除按钮
   ========================================== */

.delete-msg-btn {
    /* 继承基础样式 */
}

.delete-msg-btn:hover {
    background: rgba(239, 68, 68, 0.1) !important;
    transform: scale(1.1);
}

.delete-msg-btn:active {
    transform: scale(0.95);
}

/* ==========================================
   重发按钮
   ========================================== */

.resend-msg-btn {
    /* 继承基础样式 */
}

.resend-msg-btn:hover {
    background: rgba(59, 130, 246, 0.1) !important;
    transform: scale(1.1);
}

.resend-msg-btn:active {
    transform: scale(0.95);
}

/* ==========================================
   复制按钮
   ========================================== */

.copy-btn {
    background: rgba(0, 0, 0, 0.05);
    border: none;
    width: 24px;
    height: 24px;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.copy-btn:hover {
    background: rgba(0, 0, 0, 0.1) !important;
    transform: scale(1.05);
}

.copy-btn:active {
    transform: scale(0.95);
    background: rgba(0, 0, 0, 0.15) !important;
}

/* ==========================================
   导出 PNG 按钮
   ========================================== */

.export-png-btn {
    background: rgba(0, 0, 0, 0.05);
    border: 1px dashed #e2e8f0;
    width: 24px;
    height: 24px;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.export-png-btn:hover {
    background: rgba(0, 0, 0, 0.1) !important;
    border-color: #cbd5e1;
    transform: scale(1.05);
}

.export-png-btn:active {
    transform: scale(0.95);
}

/* ==========================================
   操作按钮容器
   ========================================== */

.action-buttons-container {
    display: none;
    gap: 5px;
    z-index: 3;
    padding: 4px;
    transition: opacity 0.2s ease;
}

/* 消息容器 hover 时显示操作按钮 */
.message-container:hover .action-buttons-container {
    display: flex !important;
}

/* 操作按钮容器自身 hover 时保持显示 */
.action-buttons-container:hover {
    display: flex !important;
}

/* ==========================================
   原始操作按钮区域（复制、导出）
   ========================================== */

.original-actions {
    position: absolute;
    top: 8px;
    left: 12px;
    display: flex;
    gap: 6px;
    opacity: 0.6;
    transition: opacity 0.2s ease;
    z-index: 2;
}

.original-actions:hover {
    opacity: 1 !important;
}

/* ==========================================
   思考过程折叠按钮
   ========================================== */

.reasoning-toggle-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 2px 6px;
    color: #64748b;
    font-size: 15px;
    transition: all 0.2s ease;
}

.reasoning-toggle-btn:hover {
    color: #475569;
    transform: scale(1.1);
}

.reasoning-toggle-btn:active {
    transform: scale(0.95);
}

/* ==========================================
   思维导图打开按钮
   ========================================== */

.mindmap-open-btn {
    padding: 10px 22px;
    font-size: 15px;
    background: rgba(59, 130, 246, 0.92);
    color: #fff;
    border: none;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(59, 130, 246, 0.12);
    cursor: pointer;
    transition: all 0.2s ease;
}

.mindmap-open-btn:hover {
    background: rgba(59, 130, 246, 1);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.2);
    transform: translateY(-1px);
}

.mindmap-open-btn:active {
    transform: translateY(0);
}

/* ==========================================
   图片点击放大
   ========================================== */

.user-message-image {
    display: block;
    width: auto;
    height: auto;
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    cursor: pointer;
    transition: all 0.2s ease;
}

.user-message-image:hover {
    opacity: 0.9;
    transform: scale(1.02);
}

.user-message-image:active {
    transform: scale(0.98);
}

/* ==========================================
   响应式调整
   ========================================== */

@media (max-width: 768px) {
    .msg-action-btn {
        width: 28px;
        height: 28px;
    }

    .copy-btn,
    .export-png-btn {
        width: 28px;
        height: 28px;
    }

    .action-buttons-container {
        gap: 8px;
    }
}

/* ==========================================
   辅助功能增强
   ========================================== */

/* 键盘焦点样式 */
.msg-action-btn:focus,
.copy-btn:focus,
.export-png-btn:focus,
.reasoning-toggle-btn:focus,
.mindmap-open-btn:focus {
    outline: 2px solid #3b82f6;
    outline-offset: 2px;
}

/* 禁用状态 */
.msg-action-btn:disabled,
.copy-btn:disabled,
.export-png-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.msg-action-btn:disabled:hover,
.copy-btn:disabled:hover,
.export-png-btn:disabled:hover {
    background: rgba(0, 0, 0, 0.05) !important;
    transform: none !important;
}

/* ==========================================
   打印样式
   ========================================== */

@media print {
    .action-buttons-container,
    .original-actions {
        display: none !important;
    }
}

/* ==========================================
   深色模式支持（可选）
   ========================================== */

@media (prefers-color-scheme: dark) {
    .msg-action-btn {
        background: rgba(255, 255, 255, 0.1);
    }

    .delete-msg-btn:hover {
        background: rgba(239, 68, 68, 0.2) !important;
    }

    .resend-msg-btn:hover {
        background: rgba(59, 130, 246, 0.2) !important;
    }

    .copy-btn,
    .export-png-btn {
        background: rgba(255, 255, 255, 0.1);
    }

    .copy-btn:hover,
    .export-png-btn:hover {
        background: rgba(255, 255, 255, 0.15) !important;
    }
}