/**
 * Dream.HQ AI学习助手样式 - 暗色主题
 * 位置：音乐播放器上方，右下角浮动
 */

/* ==================== AI助手浮动按钮 ==================== */
.ai-assistant-trigger {
    position: fixed;
    right: 20px;
    bottom: 90px;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: linear-gradient(135deg, #6361DC 0%, #8b5cf6 100%);
    border: 2px solid rgba(139, 92, 246, 0.4);
    cursor: pointer;
    z-index: 1001;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    box-shadow: 0 4px 20px rgba(99, 97, 220, 0.4);
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.ai-assistant-trigger::after {
    content: '';
    position: absolute;
    inset: -3px;
    border-radius: 50%;
    background: linear-gradient(135deg, #6361DC, #a78bfa, #6361DC);
    z-index: -1;
    opacity: 0;
    transition: opacity 0.35s ease;
}

.ai-assistant-trigger:hover {
    transform: scale(1.08);
    box-shadow: 0 6px 28px rgba(99, 97, 220, 0.6);
}

.ai-assistant-trigger:hover::after {
    opacity: 0.6;
    animation: aiRingPulse 2s ease-in-out infinite;
}

.ai-assistant-trigger:active {
    transform: scale(0.95);
}

.ai-assistant-trigger .ai-icon {
    position: relative;
    z-index: 1;
    transition: transform 0.3s ease;
}

.ai-assistant-trigger:hover .ai-icon {
    transform: rotate(-15deg) scale(1.1);
}

/* 脉冲动画 */
.ai-assistant-trigger.pulse {
    animation: aiPulse 2s ease-in-out infinite;
}

.ai-assistant-trigger.has-notification::before {
    content: '';
    position: absolute;
    top: 4px;
    right: 4px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #2ed573;
    border: 2px solid rgba(0,0,0,0.5);
    z-index: 2;
}

@keyframes aiPulse {
    0%, 100% { box-shadow: 0 4px 20px rgba(99, 97, 220, 0.4); }
    50% { box-shadow: 0 4px 35px rgba(99, 97, 220, 0.7), 0 0 60px rgba(139, 92, 246, 0.3); }
}

@keyframes aiRingPulse {
    0%, 100% { opacity: 0.4; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(1.05); }
}

/* ==================== AI助手聊天面板 ==================== */
.ai-chat-panel {
    position: fixed;
    right: 20px;
    bottom: 160px;
    width: 400px;
    max-width: calc(100vw - 40px);
    height: 520px;
    max-height: calc(100vh - 200px);
    background: #121217;
    border: 1px solid #2a2a40;
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    z-index: 1001;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(99, 97, 220, 0.1);
    transform: translateY(20px) scale(0.95);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    transform-origin: bottom right;
}

.ai-chat-panel.open {
    transform: translateY(0) scale(1);
    opacity: 1;
    visibility: visible;
    pointer-events: all;
}

/* ==================== 面板头部 ==================== */
.ai-chat-header {
    padding: 16px 20px;
    border-bottom: 1px solid #2a2a40;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
}

.ai-chat-header-left {
    display: flex;
    align-items: center;
    gap: 10px;
}

.ai-chat-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, #6361DC, #8b5cf6);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
}

.ai-chat-title {
    font-size: 15px;
    font-weight: 600;
    color: #ffffff;
}

.ai-chat-subtitle {
    font-size: 11px;
    color: #888;
    display: flex;
    align-items: center;
    gap: 4px;
}

.ai-chat-subtitle .dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #2ed573;
    display: inline-block;
}

.ai-chat-header-actions {
    display: flex;
    align-items: center;
    gap: 4px;
}

.ai-chat-header-btn {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    border: none;
    background: transparent;
    color: #999;
    cursor: pointer;
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.ai-chat-header-btn:hover {
    background: #252530;
    color: #fff;
}

.ai-chat-header-btn.close-btn:hover {
    background: rgba(255, 71, 87, 0.2);
    color: #ff4757;
}

/* ==================== 全屏模式 ==================== */
.ai-chat-panel.ai-fullscreen {
    position: fixed;
    top: 0;
    left: 0;
    right: auto;
    bottom: auto;
    width: 100vw;
    height: 100vh;
    max-width: 100vw;
    max-height: 100vh;
    border-radius: 0;
    z-index: 10000;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.ai-chat-panel.ai-fullscreen .ai-chat-messages {
    max-width: 900px;
    margin: 0 auto;
    width: 100%;
    padding: 24px 32px;
    gap: 18px;
}

.ai-chat-panel.ai-fullscreen .ai-chat-header {
    padding: 18px 28px;
}

.ai-chat-panel.ai-fullscreen .ai-chat-header,
.ai-chat-panel.ai-fullscreen .ai-chat-input-area {
    max-width: 960px;
    margin: 0 auto;
    width: 100%;
    padding-left: 28px;
    padding-right: 28px;
}

.ai-chat-panel.ai-fullscreen .ai-chat-input-area {
    padding-top: 16px;
    padding-bottom: 16px;
}

.ai-chat-panel.ai-fullscreen .ai-chat-title {
    font-size: 17px;
}

.ai-chat-panel.ai-fullscreen .ai-message-bubble {
    max-width: 65%;
    font-size: 15px;
}

/* 全屏时隐藏浮动按钮 */
body.ai-fullscreen-active .ai-assistant-trigger {
    opacity: 0;
    pointer-events: none;
}

/* ==================== 消息列表 ==================== */
.ai-chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 16px 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.ai-chat-messages::-webkit-scrollbar {
    width: 4px;
}
.ai-chat-messages::-webkit-scrollbar-track {
    background: transparent;
}
.ai-chat-messages::-webkit-scrollbar-thumb {
    background: #3a3a4a;
    border-radius: 2px;
}

/* 欢迎卡片 */
.ai-welcome-card {
    text-align: center;
    padding: 24px 16px;
    color: #888;
}

.ai-welcome-card .ai-welcome-icon {
    font-size: 48px;
    margin-bottom: 12px;
    display: block;
}

.ai-welcome-card h3 {
    color: #fff;
    font-size: 16px;
    margin: 0 0 6px 0;
}

.ai-welcome-card p {
    font-size: 13px;
    margin: 0;
    line-height: 1.6;
}

.ai-welcome-suggestions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 16px;
    justify-content: center;
}

.ai-suggestion-chip {
    background: #1e1e28;
    border: 1px solid #2a2a40;
    border-radius: 16px;
    padding: 6px 14px;
    font-size: 12px;
    color: #b8b8c8;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.ai-suggestion-chip:hover {
    background: #252530;
    border-color: #6361DC;
    color: #fff;
}

/* ==================== 消息气泡 ==================== */
.ai-message {
    display: flex;
    gap: 10px;
    animation: messageSlideIn 0.3s ease;
}

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

.ai-message.user {
    flex-direction: row-reverse;
}

.ai-message-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
}

.ai-message.assistant .ai-message-avatar {
    background: linear-gradient(135deg, #6361DC, #8b5cf6);
}

.ai-message.user .ai-message-avatar {
    background: #3a3a4a;
}

.ai-message-bubble {
    max-width: 75%;
    padding: 10px 14px;
    border-radius: 12px;
    font-size: 14px;
    line-height: 1.6;
    word-break: break-word;
}

.ai-message.assistant .ai-message-bubble {
    background: #1e1e28;
    border: 1px solid #2a2a40;
    color: #e0e0e0;
    border-bottom-left-radius: 4px;
}

.ai-message.user .ai-message-bubble {
    background: linear-gradient(135deg, #6361DC, #8b5cf6);
    color: #fff;
    border-bottom-right-radius: 4px;
}

/* 富文本消息 */
.ai-message-bubble p {
    margin: 0 0 10px 0;
    line-height: 1.7;
}

.ai-message-bubble p:last-child {
    margin-bottom: 0;
}

/* ===== Markdown 标题 ===== */
.ai-message-bubble h1,
.ai-message-bubble h2,
.ai-message-bubble h3,
.ai-message-bubble h4 {
    color: #ffffff;
    margin: 16px 0 8px 0;
    font-weight: 600;
    line-height: 1.4;
}

.ai-message-bubble h1 { font-size: 18px; border-bottom: 1px solid #2a2a40; padding-bottom: 6px; }
.ai-message-bubble h2 { font-size: 16px; }
.ai-message-bubble h3 { font-size: 15px; }
.ai-message-bubble h4 { font-size: 14px; }

/* ===== 列表 ===== */
.ai-message-bubble ul,
.ai-message-bubble ol {
    margin: 8px 0;
    padding-left: 22px;
}

.ai-message-bubble li {
    margin: 4px 0;
    line-height: 1.6;
}

.ai-message-bubble li::marker {
    color: #6361DC;
}

/* ===== 表格 ===== */
.ai-message-bubble table {
    width: 100%;
    border-collapse: collapse;
    margin: 12px 0;
    font-size: 12px;
}

.ai-message-bubble th,
.ai-message-bubble td {
    border: 1px solid #2a2a40;
    padding: 6px 10px;
    text-align: left;
}

.ai-message-bubble th {
    background: #252530;
    color: #ffffff;
    font-weight: 600;
}

.ai-message-bubble tr:nth-child(even) {
    background: rgba(255,255,255,0.02);
}

/* ===== 引用 ===== */
.ai-message-bubble blockquote {
    border-left: 3px solid #6361DC;
    margin: 10px 0;
    padding: 6px 14px;
    background: rgba(99,97,220,0.08);
    border-radius: 0 4px 4px 0;
    color: #b0b0b8;
    font-style: italic;
}

.ai-message-bubble blockquote p {
    margin: 4px 0;
}

/* ===== 分隔线 ===== */
.ai-message-bubble hr {
    border: none;
    border-top: 1px solid #2a2a40;
    margin: 14px 0;
}

/* ===== 链接 ===== */
.ai-message-bubble a {
    color: #61dafb;
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s;
}

.ai-message-bubble a:hover {
    border-bottom-color: #61dafb;
}

/* ===== 行内代码 ===== */
.ai-message-bubble code {
    background: rgba(255,255,255,0.1);
    padding: 1px 5px;
    border-radius: 3px;
    font-size: 12px;
    font-family: "Fira Code", "Consolas", monospace;
    color: #ff79c6;
}

/* ===== 代码块 ===== */
.ai-message-bubble pre {
    background: #0d0d14;
    border: 1px solid #2a2a40;
    border-radius: 8px;
    padding: 12px;
    overflow-x: auto;
    margin: 10px 0;
    font-size: 12px;
    line-height: 1.6;
    position: relative;
}

.ai-message-bubble pre code {
    background: none;
    padding: 0;
    font-size: 12px;
    color: #e0e0e0;
}

/* ===== 加粗/强调 ===== */
.ai-message-bubble strong {
    color: #ffffff;
    font-weight: 600;
}

.ai-message-bubble em {
    color: #c0c0d0;
}

/* ===== 图片 ===== */
.ai-message-bubble img {
    max-width: 100%;
    border-radius: 8px;
    margin: 8px 0;
}

/* ==================== 输入区域 ==================== */
.ai-chat-input-area {
    padding: 12px 16px;
    border-top: 1px solid #2a2a40;
    display: flex;
    align-items: flex-end;
    gap: 8px;
    flex-shrink: 0;
}

.ai-chat-input {
    flex: 1;
    background: #1e1e28;
    border: 1px solid #2a2a40;
    border-radius: 12px;
    padding: 10px 14px;
    color: #e0e0e0;
    font-size: 14px;
    font-family: inherit;
    resize: none;
    outline: none;
    min-height: 20px;
    max-height: 100px;
    line-height: 1.5;
    transition: border-color 0.2s;
}

.ai-chat-input:focus {
    border-color: #6361DC;
}

.ai-chat-input::placeholder {
    color: #666;
}

.ai-send-btn {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    border: none;
    background: linear-gradient(135deg, #6361DC, #8b5cf6);
    color: #fff;
    cursor: pointer;
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all 0.2s;
}

.ai-send-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(99, 97, 220, 0.5);
}

.ai-send-btn:active {
    transform: scale(0.95);
}

.ai-send-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* ==================== 加载动画 ==================== */
.ai-typing-indicator {
    display: flex;
    gap: 4px;
    padding: 10px 14px;
    align-items: center;
}

.ai-typing-indicator span {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #6361DC;
    animation: typingBounce 1.4s ease-in-out infinite;
}

.ai-typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.ai-typing-indicator span:nth-child(3) { animation-delay: 0.4s; }

@keyframes typingBounce {
    0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
    30% { transform: translateY(-6px); opacity: 1; }
}

/* ==================== 响应式适配 ==================== */
@media (max-width: 768px) {
    .ai-assistant-trigger {
        right: 16px;
        bottom: 76px;
        width: 46px;
        height: 46px;
        font-size: 22px;
    }

    .ai-chat-panel {
        right: 10px;
        bottom: 145px;
        width: calc(100vw - 20px);
        max-width: 400px;
        height: 460px;
        max-height: calc(100vh - 180px);
        border-radius: 14px;
    }

    .ai-chat-header {
        padding: 12px 16px;
    }

    .ai-chat-messages {
        padding: 12px 16px;
        gap: 12px;
    }

    .ai-chat-input-area {
        padding: 10px 12px;
        gap: 6px;
    }

    .ai-message-bubble {
        max-width: 82%;
    }

    /* 全屏模式 - 移动端 */
    .ai-chat-panel.ai-fullscreen .ai-chat-messages {
        padding: 16px 18px;
        gap: 14px;
    }

    .ai-chat-panel.ai-fullscreen .ai-chat-header,
    .ai-chat-panel.ai-fullscreen .ai-chat-input-area {
        padding-left: 16px;
        padding-right: 16px;
    }

    .ai-chat-panel.ai-fullscreen .ai-message-bubble {
        max-width: 85%;
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    .ai-assistant-trigger {
        right: 12px;
        bottom: 66px;
        width: 42px;
        height: 42px;
        font-size: 20px;
    }

    .ai-chat-panel {
        right: 6px;
        bottom: 120px;
        width: calc(100vw - 12px);
        height: 420px;
        max-height: calc(100vh - 170px);
    }
}