/* SAPL YAHE Chat Widget Styles */
:root {
    --dsc-font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
    --dsc-border-radius-lg: 12px; 
    --dsc-border-radius-md: 8px;
    --dsc-border-radius-sm: 25px; 
    --dsc-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    --dsc-transition-speed: 0.3s;

    /* Default Light Theme Colors */
    --dsc-primary-color: #0073aa; 
    --dsc-secondary-color: #ffffff;
    --dsc-text-color: #333333;
    --dsc-text-on-primary-color: #ffffff;
    --dsc-header-bg: var(--dsc-primary-color);
    --dsc-header-text: var(--dsc-text-on-primary-color);
    --dsc-widget-bg: var(--dsc-secondary-color);
    --dsc-bot-message-bg: #f0f0f0;
    --dsc-bot-message-text: #333333;
    --dsc-user-message-bg: var(--dsc-primary-color);
    --dsc-user-message-text: var(--dsc-text-on-primary-color);
    --dsc-input-bg: #f9f9f9;
    --dsc-input-border: #e0e0e0;
    --dsc-input-text: #333333;
    --dsc-send-button-bg: var(--dsc-primary-color);
    --dsc-send-button-text: var(--dsc-text-on-primary-color);
    --dsc-toggle-button-bg: var(--dsc-primary-color);
    --dsc-toggle-button-icon-color: var(--dsc-text-on-primary-color);
    --dsc-primary-color-rgb: 0, 115, 170;
    --dsc-resize-handle-color: rgba(0, 0, 0, 0.2);
    --dsc-resize-handle-hover-color: var(--dsc-primary-color);
    --dsc-action-button-color: #777; 
    --dsc-action-button-hover-bg: var(--dsc-primary-color); 
    --dsc-action-button-hover-icon-color: var(--dsc-text-on-primary-color); 
    --dsc-action-button-active-color: var(--dsc-primary-color);
    --dsc-action-button-success-color: #4CAF50; 
    --dsc-action-button-error-color: #F44336; 
}

/* Main Chat Window Container */
#sapl-yahe-chat-container {
    position: fixed;
    min-width: 280px; 
    min-height: 250px;
    background: var(--dsc-widget-bg);
    border-radius: var(--dsc-border-radius-lg); 
    box-shadow: var(--dsc-shadow);
    display: flex;
    flex-direction: column;
    z-index: 2147483640; 
    transition: opacity var(--dsc-transition-speed) ease-in-out, transform var(--dsc-transition-speed) ease-in-out;
    overflow: hidden; 
    font-family: var(--dsc-font-family);
    opacity: 0;
    transform: translateY(20px) scale(0.95);
    visibility: hidden;
    bottom: 20px; 
    width: 370px; 
    height: 450px;
}

#sapl-yahe-chat-container.active {
    opacity: 1;
    transform: translateY(0) scale(1);
    visibility: visible;
}

#sapl-yahe-chat-container.right.active { right: 20px; }
#sapl-yahe-chat-container.left.active { left: 20px; }

/* Resize Handles */
.dsc-resize-handle { position: absolute; background-color: transparent; z-index: 10; }
.dsc-resize-handle-top { top: 0; left: 0; width: 100%; height: 8px; cursor: ns-resize; }
.dsc-resize-handle-left { top: 0; left: 0; width: 8px; height: 100%; cursor: ew-resize; }
.dsc-resize-handle-right { top: 0; right: 0; width: 8px; height: 100%; cursor: ew-resize; }
.dsc-resize-handle-top-left { top: 0; left: 0; width: 12px; height: 12px; cursor: nwse-resize; z-index: 11; }
.dsc-resize-handle-top-right { top: 0; right: 0; width: 12px; height: 12px; cursor: nesw-resize; z-index: 11; }

/* Mobile Specific Styles */
@media (max-width: 768px) {
    .dsc-resize-handle { display: none !important; }
    #sapl-yahe-chat-container.active {
        width: calc(100vw - 20px) !important; 
        height: clamp(250px, 55vh, 450px) !important; 
        left: 10px !important; right: 10px !important; bottom: 10px !important;
        min-width: unset !important; min-height: 250px !important; 
    }
    .message-actions {
        /* Buttons are always visible now, consider if they need to be hidden or styled differently on mobile */
    }
}
@media (max-width: 768px) and (orientation: landscape) {
    #sapl-yahe-chat-container.active {
        height: clamp(150px, 80vh, 260px) !important; 
        min-height: 150px !important;
    }
    #sapl-yahe-chat-messages { min-height: 50px; }
    #sapl-yahe-chat-input-container { padding: 8px 10px; }
    #sapl-yahe-chat-input { min-height: 36px; max-height: 70px; }
    #sapl-yahe-chat-send { width: 36px; height: 36px; }
}

/* Toggle Button */
#sapl-yahe-chat-toggle-button {
    position: fixed; background-color: var(--dsc-toggle-button-bg); color: var(--dsc-toggle-button-icon-color);
    border-radius: 50%; box-shadow: 0 4px 15px rgba(0,0,0,0.2); display: flex;
    justify-content: center; align-items: center; cursor: pointer; z-index: 2147483639; 
    transition: all var(--dsc-transition-speed) ease, opacity var(--dsc-transition-speed) ease;
    transform: scale(1); overflow: hidden; padding: 0; 
}
#sapl-yahe-chat-toggle-button:hover { 
    transform: scale(1.1); 
    box-shadow: 0 6px 20px rgba(0,0,0,0.25); 
    /* 新增：Hover时应用透明度变量，使用 !important 覆盖内联样式 */
    opacity: var(--dsc-toggle-button-hover-opacity, 0.9) !important; 
}
#sapl-yahe-chat-toggle-button svg { width: 55%; height: 55%; fill: currentColor; transition: opacity 0.2s ease-in-out; position: absolute; }
#sapl-yahe-chat-toggle-button img { width: 100%; height: 100%; object-fit: cover; border-radius: 50%; }
#sapl-yahe-chat-toggle-button .dsc-icon-chat { display: block; } 
#sapl-yahe-chat-toggle-button .dsc-icon-close { display: none; } 

/* Header */
#sapl-yahe-chat-header {
    background: var(--dsc-header-bg); color: var(--dsc-header-text); padding: 12px 15px;
    display: flex; justify-content: space-between; align-items: center;
    flex-shrink: 0; user-select: none; 
}
#sapl-yahe-chat-bot-info { display: flex; align-items: center; gap: 10px; overflow: hidden; }
#sapl-yahe-chat-bot-avatar { 
    /* 修改：使用 calc 计算动态宽高 */
    width: calc(36px * var(--dsc-bot-avatar-scale, 1)); 
    height: calc(36px * var(--dsc-bot-avatar-scale, 1)); 
    border-radius: 50%; object-fit: cover; flex-shrink: 0; border: 1px solid var(--dsc-text-on-primary-color, rgba(255,255,255,0.3)); 
}
#sapl-yahe-chat-bot-name { font-weight: 600; font-size: 1rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
#sapl-yahe-chat-close-btn { cursor: pointer; font-size: 1.75rem; line-height: 1; padding: 0.1em 0.25em; color: var(--dsc-header-text); opacity: 0.7; transition: opacity var(--dsc-transition-speed); border-radius: 50%; }
#sapl-yahe-chat-close-btn:hover { opacity: 1; background-color: rgba(0,0,0,0.1); }

/* Messages Area */
#sapl-yahe-chat-messages {
    flex: 1; padding: 15px; overflow-y: auto; display: flex;
    flex-direction: column; gap: 12px; background-color: var(--dsc-widget-bg);
}
.sapl-yahe-chat-message {
    max-width: 85%; padding: 10px 15px; border-radius: var(--dsc-border-radius-md);
    line-height: 1.55; position: relative; word-wrap: break-word; 
    box-shadow: 0 1px 2px rgba(0,0,0,0.05); font-size: 0.9rem; 
}
.bot-message { background: var(--dsc-bot-message-bg); color: var(--dsc-bot-message-text); align-self: flex-start; border-bottom-left-radius: 4px; }
.user-message { background: var(--dsc-user-message-bg); color: var(--dsc-user-message-text); align-self: flex-end; border-bottom-right-radius: 4px; }

/* Message Actions (Copy, Email buttons) - Left Aligned */
.message-actions {
    text-align: left; /* MODIFIED: Changed from right to left */
    margin-top: 8px;
    margin-bottom: -5px; 
    opacity: 0.8; 
    visibility: visible; 
    height: auto; 
    overflow: visible; 
    transition: opacity 0.2s ease-in-out; 
}
.message-actions:hover {
    opacity: 1; 
}

.dsc-action-btn {
    background: transparent; 
    border: none;
    cursor: pointer;
    padding: 6px; 
    margin-right: 4px; /* MODIFIED: Use margin-right for spacing when left-aligned */
    margin-left: 0;    /* MODIFIED: Ensure no left margin */
    color: var(--dsc-action-button-color); 
    display: inline-flex; 
    align-items: center;
    justify-content: center;
    border-radius: 50%; 
    width: 28px;  
    height: 28px; 
    transition: background-color 0.2s ease-in-out, color 0.2s ease-in-out;
    box-sizing: border-box;
}
.dsc-action-btn:first-child { /* MODIFIED: Remove margin from the first button if needed */
    /* margin-left: 0; /* This is already set above, but can be explicit */
}
.dsc-action-btn svg {
    width: 16px; 
    height: 16px;
    fill: currentColor; 
}
.dsc-action-btn:hover {
    color: var(--dsc-action-button-hover-icon-color); 
    background-color: var(--dsc-action-button-hover-bg); 
}
.dsc-action-btn.dsc-btn-active { /* Style for when read aloud was active (kept for consistency if needed later) */
    color: var(--dsc-action-button-hover-icon-color); 
    background-color: var(--dsc-action-button-hover-bg); 
}
.dsc-action-btn.dsc-btn-success { 
    color: var(--dsc-action-button-success-color) !important; 
}
.dsc-action-btn.dsc-btn-error { 
    color: var(--dsc-action-button-error-color) !important; 
}


/* Markdown Content Styling */
.message-content {} 
.message-content p { margin-top: 0.5em; margin-bottom: 0.5em; }
.message-content p:first-child { margin-top: 0; }
.message-content p:last-child { margin-bottom: 0; }
.message-content h1, .message-content h2, .message-content h3, .message-content h4, .message-content h5, .message-content h6 {
    margin-top: 0.8em; margin-bottom: 0.3em; line-height: 1.3; 
}
.message-content h1 + p, .message-content h2 + p, .message-content h3 + p, .message-content h4 + p, .message-content h5 + p, .message-content h6 + p {
    margin-top: 0;
}
.message-content ul, .message-content ol { padding-left: 20px; margin-top: 0.6em; margin-bottom: 0.6em; }
.message-content li { margin-bottom: 0.25em; } 
.message-content pre { background-color: #f0f0f0; padding: 10px; border-radius: var(--dsc-border-radius-md); overflow-x: auto; margin: 0.6em 0; font-size: 0.85em; }
.message-content code { background-color: #e8e8e8; padding: 2px 4px; border-radius: 3px; font-family: Consolas, Monaco, 'Andale Mono', 'Ubuntu Mono', monospace; font-size: 0.9em; }
.message-content pre code { background-color: transparent; padding: 0; font-size: inherit; }
.message-content blockquote { border-left: 3px solid var(--dsc-primary-color, #0073aa); padding-left: 10px; margin: 0.6em 0; color: #555; font-style: italic; }
.message-content table { border-collapse: collapse; margin: 0.8em 0; width: 100%; } 
.message-content th, .message-content td { border: 1px solid #ddd; padding: 6px; text-align: left; } 
.message-content th { background-color: #f2f2f2; }

.message-time { font-size: 0.6875rem; opacity: 0.6; text-align: right; margin-top: 6px; display: block; }
.sapl-yahe-chat-message.loading-message { display: flex; align-items: center; gap: 8px; opacity: 0.8; background: var(--dsc-bot-message-bg); color: var(--dsc-bot-message-text); padding: 12px 15px; }
.typing-indicator span { height: 7px; width: 7px; background-color: var(--dsc-bot-message-text); opacity: 0.7; border-radius: 50%; display: inline-block; animation: typing 1.4s infinite ease-in-out both; }
.typing-indicator span:nth-child(1) { animation-delay: -0.32s; }
.typing-indicator span:nth-child(2) { animation-delay: -0.16s; }
@keyframes typing { 0%, 80%, 100% { transform: scale(0); } 40% { transform: scale(1.0); } }

/* Input Area */
#sapl-yahe-chat-input-container {
    padding: 12px 15px; border-top: 1px solid var(--dsc-input-border); display: flex;
    gap: 10px; align-items: flex-end; background-color: var(--dsc-widget-bg); flex-shrink: 0; 
}
#sapl-yahe-chat-input {
    flex: 1; padding: 10px 15px; border: 1px solid var(--dsc-input-border);
    border-radius: var(--dsc-border-radius-sm); resize: none; font-family: inherit;
    font-size: 0.9rem; line-height: 1.5; background-color: var(--dsc-input-bg);
    color: var(--dsc-input-text);
    transition: border-color var(--dsc-transition-speed), box-shadow var(--dsc-transition-speed), height 0.1s ease-out; 
    min-height: 40px; max-height: 100px; overflow-y: auto; 
}
#sapl-yahe-chat-input:focus { border-color: var(--dsc-primary-color); box-shadow: 0 0 0 2px rgba(var(--dsc-primary-color-rgb), 0.25); }
#sapl-yahe-chat-send { background: var(--dsc-send-button-bg); color: var(--dsc-send-button-text); }
#sapl-yahe-chat-toggle-button { background-color: var(--dsc-toggle-button-bg); color: var(--dsc-toggle-button-icon-color); }

/* Scrollbar styling */
#sapl-yahe-chat-messages::-webkit-scrollbar { width: 6px; }
#sapl-yahe-chat-messages::-webkit-scrollbar-track { background: transparent; }
#sapl-yahe-chat-messages::-webkit-scrollbar-thumb { background: rgba(var(--dsc-primary-color-rgb), 0.5); border-radius: 3px; }
#sapl-yahe-chat-messages::-webkit-scrollbar-thumb:hover { background: rgba(var(--dsc-primary-color-rgb), 0.7); }