/* ============================================
   📨 逸事 (Anecdotes) - 现代纸条 (Modern Letter Strip)
   ============================================ */

/* === 全局容器 === */
.anecdotes-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    z-index: 100000;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.5s ease;
    font-family: "Songti SC", "STSong", "SimSun", "Noto Serif SC", serif;
}

.anecdotes-modal.active {
    opacity: 1;
    visibility: visible;
}

/* === 关闭按钮 === */
.anecdotes-close-btn {
    position: absolute;
    top: 30px;
    right: 30px;
    width: 40px;
    height: 40px;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.4);
    border-radius: 50%;
    color: rgba(255, 255, 255, 0.9);
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    z-index: 100002;
    backdrop-filter: blur(5px);
}
.anecdotes-close-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: rotate(90deg);
}

/* === 爱品入口按钮 (Binder Icon) === */
.anecdotes-collection-btn {
    position: absolute;
    top: 30px;
    left: 30px;
    width: 40px;
    height: 40px;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.4);
    border-radius: 50%;
    color: rgba(255, 255, 255, 0.9);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    z-index: 100002;
    backdrop-filter: blur(5px);
}
.anecdotes-collection-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: scale(1.1);
}
.anecdotes-collection-btn svg {
    width: 20px;
    height: 20px;
}

/* === 核心触发器：信封 (Pure CSS Envelope) === */
.treasure-box {
    position: relative;
    width: 140px;
    height: 90px;
    background: linear-gradient(to bottom, #fdfbf7, #f4f1ea);
    border: 1px solid #e0e0e0;
    border-radius: 4px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    cursor: pointer;
    transition: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
}
.treasure-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 0;
    border-style: solid;
    border-width: 50px 70px 0 70px;
    border-color: #e8e4db transparent transparent transparent;
    transform-origin: top;
    transition: transform 0.4s ease;
    z-index: 3;
    pointer-events: none;
}
.treasure-box::after {
    content: '✉️';
    font-size: 24px;
    opacity: 0.3;
    color: #8b5a2b;
    z-index: 4;
}
.treasure-box:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}
.treasure-box:hover::before {
    transform: rotateX(20deg);
}
.treasure-box.opened {
    transform: scale(0.8) translateY(20px);
    opacity: 0;
    pointer-events: none;
}
.treasure-box.thinking {
    animation: letterBreath 1.5s infinite ease-in-out;
}
@keyframes letterBreath {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

/* === 纸条容器 === */
.letter-container {
    position: absolute;
    width: 90%;
    max-width: 380px;
    height: auto;
    max-height: 80vh;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
    pointer-events: none;
    display: flex;
    flex-direction: column;
}
.letter-container.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

/* === 纸张本体 === */
.letter-paper {
    background: #fffdf9;
    background-image: linear-gradient(#f0efeb 1px, transparent 1px);
    background-size: 100% 32px;
    background-attachment: local;
    background-position: 0 34px;
    border-radius: 2px;
    box-shadow: 
        0 2px 10px rgba(0, 0, 0, 0.05),
        0 20px 50px rgba(0, 0, 0, 0.1);
    padding: 35px 30px;
    padding-bottom: 60px;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    position: relative;
    scrollbar-width: none;
    -ms-overflow-style: none;
}
.letter-paper::-webkit-scrollbar { display: none; }

/* === 输入框 === */
.letter-textarea {
    width: 100%;
    min-height: 160px;
    background: transparent;
    border: none;
    padding: 0;
    font-family: inherit;
    font-size: 17px;
    line-height: 32px;
    color: #333;
    resize: none;
    outline: none;
    margin-bottom: 30px;
}
.letter-textarea::placeholder {
    color: #bbb;
    font-style: italic;
}
.letter-input-mode .letter-title { display: none; }

/* === 按钮 (动漫手绘线条风格) === */
.letter-confirm-btn {
    width: 100%;
    padding: 12px 0;
    background: #ffffff;
    color: #000000;
    border: 2px solid #bdbdbd;
    border-radius: 255px 15px 225px 15px / 15px 225px 15px 255px;
    font-size: 16px;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s ease-in-out;
    margin-top: auto;
    box-shadow: 4px 4px 0 #dcdcdc;
    letter-spacing: 2px;
}
.letter-confirm-btn:hover {
    background: #000000;
    color: #ffffff;
    border-radius: 15px 225px 15px 255px / 255px 15px 225px 15px;
    box-shadow: 2px 2px 0 #000000;
    transform: translate(2px, 2px);
    letter-spacing: 2px;
}
.letter-confirm-btn:active {
    box-shadow: 0 0 0 #000000;
    transform: translate(4px, 4px);
}

/* === 笔按钮样式 (修复巨大的SVG) === */
.letter-pen-btn {
    position: absolute;
    bottom: -60px; /* 移出纸张下方 */
    right: 0;
    width: 50px;
    height: 50px;
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 50%;
    display: none; /* 默认隐藏，需要时只要去掉 display:none 或者设为 flex */
    /* 实际上HTML结构里它在 letter-container 内部还是外部？
       根据Step 813，它在 letter-container 内。
       但是我们希望它浮动。
    */
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: all 0.3s;
    z-index: 10;
}
/* 如果它在 letter-container 内部，且容器是 column flex，它会被挤压。
   检查 index.html 结构... 
   <div id="anecdotes-letter"...>
      <div class="letter-paper">...</div>
      <button ...>
   </div>
   container is flex column? 
   .letter-container { display: flex; flex-direction: column; }
   So the button will be stacked below the paper.
   That's fine.
*/
.letter-pen-btn {
    display: flex; /* 覆盖上面的 none, 只要 .letter-container visible */
    margin-top: 15px;
    align-self: flex-end; /* 靠右 */
    position: relative;
    bottom: auto;
    right: auto;
}

.letter-pen-btn svg {
    width: 24px;
    height: 24px;
    color: #555;
    transition: transform 0.3s;
}
.letter-pen-btn:hover {
    transform: scale(1.1);
    background: #fdfdfd;
}
.letter-pen-btn:hover svg {
    transform: rotate(15deg);
    color: #000;
}


/* === 爱品列表容器 (Binder Style) === */
.anecdotes-collection-modal {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    backdrop-filter: blur(25px);
    background: rgba(255, 255, 255, 0.4);
    z-index: 100005;
    display: none;
    justify-content: center;
    align-items: center;
    animation: fadeIn 0.3s ease;
}
.anecdotes-collection-modal.active { display: flex; }

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.collection-binder {
    width: 90%; max-width: 420px;
    height: 75vh;
    background: #fdfbf7;
    border-radius: 6px;
    /* 活页本效果 */
    box-shadow: 
        24px 0 0 #e8e4db inset, /* 侧边 */
        25px 0 0 rgba(0,0,0,0.05) inset, /* 缝隙阴影 */
        0 15px 50px rgba(0,0,0,0.15);
    padding: 20px;
    padding-left: 50px; /* 让出孔位 */
    position: relative;
    display: flex;
    flex-direction: column;
}

/* 活页孔 */
.collection-binder::before {
    content: '';
    position: absolute;
    top: 30px; bottom: 30px; left: 12px;
    width: 10px;
    background-image: radial-gradient(circle, #333 30%, transparent 31%);
    background-size: 100% 40px;
}

.binder-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 15px;
    border-bottom: 2px solid #333;
    margin-bottom: 15px;
}
.binder-header h2 {
    margin: 0;
    font-size: 20px;
    color: #333;
    font-weight: 600;
    letter-spacing: 2px;
}
.collection-close-btn {
    background: none;
    border: none;
    font-size: 24px;
    color: #999;
    cursor: pointer;
}
.collection-close-btn:hover { color: #333; }

.collection-list {
    flex: 1;
    overflow-y: auto;
    padding-right: 5px;
    /* 滚动条 */
    scrollbar-width: thin;
    scrollbar-color: #ddd transparent;
}
.collection-list::-webkit-scrollbar { width: 4px; }
.collection-list::-webkit-scrollbar-thumb { background: #ddd; border-radius: 2px; }

/* 列表项 (活页纸条) */
.collection-item {
    background: #fff;
    padding: 15px;
    margin-bottom: 15px;
    border-bottom: 1px dashed #ccc;
    position: relative;
    transition: background 0.2s;
}
.collection-item:hover {
    background: #fafafa;
}
.collection-date {
    font-size: 12px;
    color: #999;
    margin-bottom: 5px;
    font-family: "Helvetica Neue", sans-serif; /* 日期用无衬线体更清晰 */
}
.collection-summary {
    font-size: 15px;
    line-height: 1.6;
    color: #333;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-line-clamp: 3; /* Standard property for compatibility */
    line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.collection-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 10px;
    opacity: 0.6;
    transition: opacity 0.2s;
}
.collection-item:hover .collection-actions { opacity: 1; }

.collection-action-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
    color: #999;
    transition: color 0.2s;
}
.collection-action-btn:hover { color: #333; }
.collection-action-btn svg { width: 16px; height: 16px; }

/* === 按钮组 (结果页) === */
.letter-actions button {
    background: transparent;
    border: none;
    border-top: 1px dashed #ddd; /* 与 "再写一封" 保持一致 */
    color: #999;
    font-size: 13px;
    font-family: inherit;
    cursor: pointer;
    transition: color 0.2s, background 0.2s;
    padding: 10px;
}
.letter-actions button:hover {
    color: #8b5a2b;
    background: rgba(139, 90, 43, 0.05);
}

/* 隐藏原有古风多余元素 */
.box-body, .box-lid, .box-body::before, .box-body::after, .box-lid::before, .box-lid::after {
    display: none;
}

/* === 内容展示模式 === */
.letter-response-mode .letter-content {
    font-size: 17px;
    line-height: 32px;
    color: #2c2c2c;
    white-space: pre-wrap;
    text-align: left;
    letter-spacing: 0.05em;
    padding-bottom: 20px;
}
.letter-response-mode::before {
    content: 'DATE: ' attr(data-date);
    display: block;
    font-size: 10px;
    color: #ccc;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 20px;
    text-align: center;
}
.letter-signature {
    text-align: right;
    margin-top: 40px;
    font-size: 14px;
    color: #555;
    font-style: italic;
}

/* 加载动画 */
.letter-loading {
    min-height: 200px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
.letter-loading-spinner {
    width: 30px;
    height: 30px;
    border: 2px solid rgba(139, 90, 43, 0.2);
    border-top-color: #8b5a2b;
    border-radius: 50%;
    animation: spin 1s infinite linear;
    margin-bottom: 20px;
}
.letter-loading-text {
    font-size: 14px;
    color: #8b5a2b;
    font-style: italic;
    animation: pulse 1.5s infinite;
}
.anecdotes-hint {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
    margin-top: 80px;
    text-shadow: 0 1px 2px rgba(0,0,0,0.1);
    font-family: inherit;
    letter-spacing: 1px;
}

/* ============================================
   📝 Markdown 渲染样式 for Letter Paper
   ============================================ */

/* === 段落 === */
.letter-paragraph {
    font-size: 17px;
    line-height: 32px;
    color: #2c2c2c;
    margin: 0 0 16px 0;
    /* 改为左对齐，避免字距过大 */
    text-align: left;
    letter-spacing: 0.05em;
}

/* === 标题系列 === */
.letter-h1 {
    font-size: 24px;
    font-weight: 700;
    color: #1a1a1a;
    margin: 24px 0 16px 0;
    line-height: 1.4;
    border-bottom: 2px solid #8b5a2b;
    padding-bottom: 8px;
    letter-spacing: 0.1em;
}

.letter-h2 {
    font-size: 22px;
    font-weight: 700;
    color: #1a1a1a;
    margin: 20px 0 14px 0;
    line-height: 1.4;
    border-bottom: 1px solid #d0d0d0;
    padding-bottom: 6px;
    letter-spacing: 0.08em;
}

.letter-h3 {
    font-size: 20px;
    font-weight: 600;
    color: #2c2c2c;
    margin: 18px 0 12px 0;
    line-height: 1.4;
    letter-spacing: 0.06em;
}

.letter-h4 {
    font-size: 18px;
    font-weight: 600;
    color: #2c2c2c;
    margin: 16px 0 10px 0;
    line-height: 1.4;
}

.letter-h5 {
    font-size: 17px;
    font-weight: 600;
    color: #333;
    margin: 14px 0 8px 0;
    line-height: 1.4;
}

.letter-h6 {
    font-size: 16px;
    font-weight: 600;
    color: #555;
    margin: 12px 0 6px 0;
    line-height: 1.4;
}

/* === 粗体和斜体 === */
.letter-bold {
    font-weight: 700;
    color: #1a1a1a;
}

.letter-italic {
    font-style: italic;
    color: #555;
}

.letter-strikethrough {
    text-decoration: line-through;
    color: #999;
    opacity: 0.7;
}

/* === 代码块 === */
.letter-code-block {
    background: #f5f2ed;
    border: 1px solid #e0ddd8;
    border-left: 3px solid #8b5a2b;
    border-radius: 3px;
    padding: 12px 16px;
    margin: 16px 0;
    overflow-x: auto;
    font-family: "SF Mono", "Monaco", "Inconsolata", "Fira Code", "Fira Mono", "Roboto Mono", "Courier New", monospace;
    font-size: 14px;
    line-height: 1.6;
    color: #333;
    white-space: pre;
    scrollbar-width: thin;
    scrollbar-color: #ccc transparent;
}

.letter-code-block::-webkit-scrollbar {
    height: 6px;
}

.letter-code-block::-webkit-scrollbar-thumb {
    background: #ccc;
    border-radius: 3px;
}

.letter-code-block code {
    background: none;
    padding: 0;
    border: none;
    font-size: inherit;
    color: inherit;
}

/* 代码块语言标签 */
.letter-code-block[data-lang]::before {
    content: attr(data-lang);
    display: block;
    font-size: 11px;
    color: #8b5a2b;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
    font-weight: 600;
}

/* === 行内代码 === */
.letter-inline-code {
    background: #f5f2ed;
    border: 1px solid #e0ddd8;
    border-radius: 3px;
    padding: 2px 6px;
    font-family: "SF Mono", "Monaco", "Inconsolata", "Courier New", monospace;
    font-size: 15px;
    color: #8b5a2b;
    /* 允许换行，避免溢出 */
    white-space: pre-wrap;
    word-wrap: break-word;
    word-break: break-all;
    /* 行内显示 */
    display: inline;
}

/* === 列表 === */
.letter-ul,
.letter-ol {
    margin: 12px 0;
    padding-left: 28px;
    line-height: 32px;
}

.letter-ul {
    list-style-type: disc;
}

.letter-ol {
    list-style-type: decimal;
}

.letter-li,
.letter-li-ordered {
    font-size: 17px;
    color: #2c2c2c;
    margin: 6px 0;
    line-height: 32px;
    letter-spacing: 0.05em;
}

.letter-li::marker {
    color: #8b5a2b;
}

.letter-li-ordered::marker {
    color: #8b5a2b;
    font-weight: 600;
}

/* === 引用 === */
.letter-blockquote {
    background: #faf9f7;
    border-left: 4px solid #8b5a2b;
    margin: 16px 0;
    padding: 12px 20px;
    font-style: italic;
    color: #555;
    line-height: 32px;
    position: relative;
}

.letter-blockquote::before {
    content: '"';
    position: absolute;
    top: 8px;
    left: 8px;
    font-size: 32px;
    color: #d0c8b8;
    font-family: Georgia, serif;
    line-height: 1;
}

.letter-blockquote p {
    margin: 0;
}

/* === 分隔线 === */
.letter-hr {
    border: none;
    border-top: 1px dashed #ccc;
    margin: 24px 0;
    opacity: 0.6;
}

/* === 链接 === */
.letter-link {
    color: #8b5a2b;
    text-decoration: none;
    border-bottom: 1px solid #d0c8b8;
    transition: all 0.2s ease;
}

.letter-link:hover {
    color: #6d4623;
    border-bottom-color: #8b5a2b;
    background: rgba(139, 90, 43, 0.05);
}

/* === 图片 === */
.letter-image {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 16px auto;
    border-radius: 4px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* === 响应式调整 === */
@media (max-width: 400px) {
    .letter-paragraph,
    .letter-li,
    .letter-li-ordered {
        font-size: 16px;
        line-height: 28px;
    }
    
    .letter-h1 { font-size: 22px; }
    .letter-h2 { font-size: 20px; }
    .letter-h3 { font-size: 18px; }
    .letter-h4 { font-size: 17px; }
    
    .letter-code-block {
        font-size: 13px;
        padding: 10px 12px;
    }
    
    .letter-inline-code {
        font-size: 14px;
    }
}

/* === 确保内容容器支持 Markdown === */
#anecdotes-response-content {
    font-size: 17px;
    line-height: 32px;
    color: #2c2c2c;
    text-align: left;
    letter-spacing: 0.05em;
    padding-bottom: 20px;
}

/* 移除旧的 white-space: pre-wrap，让 Markdown 自然排版 */
.letter-response-mode .letter-content {
    white-space: normal;
}