/* public/css/style.css - 最终优化版 (完整版) */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f0f2f5; /* 更明亮的背景色 */
    color: #1f1f1f; /* 深色文字以保证对比度 */
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.container {
    width: 90%;
    max-width: 1024px;
    margin: 30px auto;
    padding: 30px;
    background-color: #ffffff;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    border-radius: 10px;
    flex-grow: 1;
}

header {
    background-color: #ffffff; /* 浅色头部 */
    color: #1f1f1f;
    padding: 1.5rem 0;
    text-align: center;
    border-bottom: 1px solid #dcdcdc; /* 细边框 */
}

header h1 {
    margin: 0;
    font-size: 2.2rem;
    font-weight: 500;
    color: #1a73e8; /* 主题蓝色 */
}

header nav {
    margin-top: 15px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 18px;
    flex-wrap: wrap; /* 允许头部导航按钮换行 */
}
.welcome-user {
    color: #5f6368; /* 头部欢迎文字颜色 */
    font-size: 0.95rem;
    margin-bottom: 5px; /* 在换行时给一点底部间距 */
}
.welcome-user strong {
    color: #1a73e8;
}

/* --- 统一操作按钮样式 (除富文本、登出、删除外) --- */
.button-action,
input[type="submit"], /* 登录页的提交按钮 */
.button-like, /* <a> 标签模拟的按钮 */
.button-header:not(.danger) /* 头部非危险按钮 */
{
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 500; 
    color: #ffffff;
    text-align: center;
    vertical-align: middle;
    cursor: pointer;
    user-select: none;
    background-color: #1a73e8; /* 主题蓝色 */
    border: 1px solid #1a73e8;
    padding: 0.6rem 1.2rem;
    font-size: 0.95rem;
    line-height: 1.5;
    border-radius: 0.35rem; 
    transition: background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
    text-decoration: none;
    min-height: 40px;
    box-sizing: border-box;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}
.button-action:hover,
input[type="submit"]:hover,
.button-like:hover,
.button-header:not(.danger):hover {
    background-color: #1765c7; 
    border-color: #1765c7;
    box-shadow: 0 2px 4px rgba(0,0,0,0.08);
}
.button-action:focus,
input[type="submit"]:focus,
.button-like:focus,
.button-header:not(.danger):focus {
    outline: none;
    box-shadow: 0 0 0 0.2rem rgba(26, 115, 232, 0.35); 
}

/* 危险操作按钮 (登出, 删除) */
.button-danger, button.danger, .button-header.danger {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 500;
    color: #ffffff;
    text-align: center;
    vertical-align: middle;
    cursor: pointer;
    user-select: none;
    background-color: #d93025; /* 红色 */
    border: 1px solid #d93025;
    padding: 0.6rem 1.2rem;
    font-size: 0.95rem;
    line-height: 1.5;
    border-radius: 0.35rem;
    transition: background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
    text-decoration: none;
    min-height: 40px;
    box-sizing: border-box;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}
.button-danger:hover, button.danger:hover, .button-header.danger:hover {
    background-color: #c5221f; 
    border-color: #c5221f;
    box-shadow: 0 2px 4px rgba(0,0,0,0.08);
}
.button-danger:focus, button.danger:focus, .button-header.danger:focus {
    outline: none;
    box-shadow: 0 0 0 0.2rem rgba(217, 48, 37, 0.35);
}
.button-header.danger { 
    padding: 0.45rem 0.9rem;
}


h2 {
    color: #1a73e8; 
    border-bottom: 1px solid #e0e0e0;
    padding-bottom: 15px;
    margin-top: 0;
    margin-bottom: 30px;
    font-weight: 500;
    font-size: 1.8rem;
}

.form-styled div, form div {
    margin-bottom: 1.5rem;
}
.form-styled label, form label {
    display: block;
    margin-bottom: 0.6rem;
    font-weight: 500;
    color: #3c4043; 
}
.checkbox-label {
    display: inline-block !important;
    font-weight: normal !important;
    margin-left: 0.4rem;
    vertical-align: middle;
}

.form-styled input[type="text"], .form-styled input[type="password"], .form-styled select, .form-styled textarea,
form input[type="text"], form input[type="password"], form select, form textarea,
.form-styled input[type="number"] 
{
    display: block;
    width: 100%;
    padding: 0.6rem 0.85rem;
    font-size: 0.95rem;
    line-height: 1.5;
    color: #3c4043;
    background-color: #ffffff;
    background-clip: padding-box;
    border: 1px solid #dadce0; 
    border-radius: 0.3rem;
    box-sizing: border-box;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
    min-height: 40px;
}
.form-styled input[type="file"], form input[type="file"] {
    padding: 10px 0;
    min-height: auto;
    border: none; 
}

/* (新增) 修复复选框样式 */
.form-styled input[type="checkbox"], form input[type="checkbox"] {
    display: inline-block;
    width: auto;
    min-height: auto;
    vertical-align: middle;
}


.form-styled input:focus, form input:focus,
.form-styled select:focus, form select:focus,
.form-styled textarea:focus, form textarea:focus,
.form-styled input[type="number"]:focus
{
    border-color: #1a73e8; 
    outline: 0;
    box-shadow: 0 0 0 0.2rem rgba(26, 115, 232, 0.25);
}

.form-actions {
    margin-top: 2rem;
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
}

.note-list {
    list-style: none;
    padding: 0;
}
.note-item {
    background-color: #ffffff;
    border: 1px solid #e0e0e0;
    padding: 25px;
    margin-bottom: 18px;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    transition: box-shadow 0.2s ease-in-out, background-color 0.2s ease-in-out, border-color 0.2s ease-in-out;
}
.note-item:hover {
    box-shadow: 0 5px 15px rgba(0,0,0,0.07);
}
/* (新增) 置顶文章样式 */
.note-item.pinned {
    background-color: #fffbef; /* 浅黄色背景 */
    border-color: #ffeeba; /* 稍深的黄色边框 */
}
.note-item.pinned:hover {
    box-shadow: 0 5px 15px rgba(255, 235, 186, 0.6);
}


.note-item h3 {
    margin-top: 0;
    margin-bottom: 8px;
    font-size: 1.4rem;
    font-weight: 500;
    color: #1a73e8;
}
.note-item h3 a.note-title-link { /* 确保标题链接样式 */
    color: inherit; /* 继承 h3 的颜色 */
    text-decoration: none;
}
.note-item h3 a.note-title-link:hover {
    text-decoration: underline;
}

.note-item .note-owner {
    font-size: 0.85rem;
    color: #5f6368;
    font-weight: normal;
}
.note-item .note-meta {
    font-size: 0.8rem;
    color: #5f6368;
    margin-bottom: 12px;
    display: flex; /* 新增 */
    gap: 15px; /* 新增 */
    flex-wrap: wrap; /* 新增 */
}
.note-item .note-content-preview {
    font-size: 0.95rem;
    color: #3c4043;
    word-break: break-word;
    max-height: 60px;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 10px;
}
.note-item .note-actions {
    display: flex;
    gap: 10px;
    align-items: center;
    align-self: flex-start;
    flex-wrap: wrap; 
}
.note-item .note-actions .button-action,
.note-item .note-actions .button-danger {
    padding: 0.45rem 0.9rem;
    font-size: 0.9rem;
    min-width: 75px;
}

/* 新增：文章列表中的分类和状态 */
.article-category {
    background-color: #e9f5ff;
    color: #1a73e8;
    padding: 2px 6px;
    border-radius: 3px;
    font-weight: 500;
}
.article-status-draft {
    background-color: #fef0e9;
    color: #d9534f;
    padding: 2px 6px;
    border-radius: 3px;
    font-weight: 500;
    font-size: 0.9em;
}

/* (新增) 文章列表中的置顶徽章 */
.article-pinned-badge {
    display: inline-block;
    background-color: #ffc107;
    color: #333;
    padding: 2px 6px;
    border-radius: 3px;
    font-weight: bold;
    font-size: 0.9em;
    vertical-align: middle;
}


.current-attachment-info, .note-attachment {
    margin-top: 10px;
    font-size: 0.9em;
    color: #3c4043;
}
.current-attachment-info a, .note-attachment a {
    color: #1a73e8;
    text-decoration: none;
    font-weight: 500;
}
.current-attachment-info a:hover, .note-attachment a:hover {
    text-decoration: underline;
}

/* 富文本编辑器包裹容器 */
.rich-text-editor-wrapper {
    display: flex;
    flex-direction: column;
    border: 1px solid #dadce0; 
    border-radius: 0.3rem;   
    margin-top: 5px; 
}

/* 富文本编辑器工具栏 */
#richTextToolbar {
    padding: 5px; 
    background-color: #f1f3f4; 
    border: none; 
    border-bottom: 1px solid #dadce0; 
    border-top-left-radius: 0; /* 由 wrapper 处理 */
    border-top-right-radius: 0; /* 由 wrapper 处理 */
    display: flex; 
    flex-wrap: wrap; 
    align-items: center; 
    gap: 4px; 
    flex-shrink: 0; 
}

#richTextToolbar > button,
#richTextToolbar > select,
#richTextToolbar > input[type="color"],
#richTextToolbar > label.sr-only { 
    display: inline-flex; 
    align-items: center; 
    justify-content: center; 
    vertical-align: middle; 
    margin: 1px; 
    padding: 0 5px; 
    font-size: 0.85rem; 
    background-color: #ffffff;
    color: #3c4043;
    border: 1px solid #bdc1c6;
    border-radius: 0.2rem; 
    height: 28px; 
    line-height: normal; 
    box-sizing: border-box; 
    box-shadow: none;
    transition: background-color 0.1s ease, border-color 0.1s ease;
    flex-grow: 0; 
    flex-shrink: 1; 
    flex-basis: auto; 
}

#richTextToolbar > button {
    /* padding-top: 1px;
    padding-bottom: 1px; */
}

#richTextToolbar > select {
    padding-top: 1px; 
    padding-bottom: 1px;
    padding-left: 4px; 
    padding-right: 20px; 
    min-width: 55px; 
    max-width: 110px; 
}

#richTextToolbar > input[type="color"] {
    padding: 0; 
    width: 28px; 
    border-width: 1px; 
}


#richTextToolbar > button:hover,
#richTextToolbar > select:hover,
#richTextToolbar > input[type="color"]:hover {
    background-color: #e8eaed;
    border-color: #adb1b5;
}

.sr-only { 
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border-width: 0 !important;
}


#richContent {
    border: none; 
    border-radius: 0;
    padding: 15px;
    min-height: 150px; 
    max-height: 350px; 
    background-color: #ffffff;
    overflow-y: auto; 
    line-height: 1.7;
    color: #1f1f1f;
    flex-grow: 1; 
}
#richContent:focus {
    outline: 2px solid rgba(26, 115, 232, 0.4); 
    outline-offset: -1px; 
}

.error-message, .success-message {
    border: 1px solid transparent;
    padding: 0.8rem 1.3rem;
    margin-bottom: 1.2rem;
    border-radius: 0.3rem;
    font-size: 0.95rem;
}
.error-message {
    color: #a50e0e;
    background-color: #fdd8d6;
    border-color: #f7c5c2;
}
.success-message {
    color: #0d652d;
    background-color: #d3eadd;
    border-color: #bde4ca;
}

.user-list {
    list-style-type: none;
    padding: 0;
    margin-top: 25px;
}
.user-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 18px;
    border: 1px solid #e0e0e0;
    margin-bottom: -1px;
    background-color: #fff;
}
.user-item:first-child {
    border-top-left-radius: 0.3rem;
    border-top-right-radius: 0.3rem;
}
.user-item:last-child {
    border-bottom-left-radius: 0.3rem;
    border-bottom-right-radius: 0.3rem;
    margin-bottom: 0;
}
.user-item span {
    margin-right: 12px;
    color: #3c4043;
}
.user-item span strong {
    color: #1f1f1f;
}
.user-item .user-item-actions { 
    display: flex;
    gap: 8px; 
    flex-wrap: wrap;
}
.user-item .user-item-actions .button-action,
.user-item .user-item-actions .button-danger {
    padding: 0.4rem 0.8rem;
    font-size: 0.9rem;
    min-width: 70px;
}

/* --- (新增) 修复登录框太大 --- */
/* 新增：用于登录、注册等页面的窄容器 */
.form-container {
    max-width: 500px; /* 限制最大宽度 */
    margin-left: auto; /* 自动居中 */
    margin-right: auto; /* 自动居中 */
}
/* 确保窄容器内的 h2 标题样式一致 */
.form-container h2 {
    text-align: left; /* 保持与 admin.html 一致 */
}
/* --- 结束新增 --- */

/* (新增) 分类过滤器 */
.category-filter select {
    /* 样式已内联在 index.html 中，但保留 CSS 规则以便将来扩展 */
    min-height: 38px;
    box-sizing: border-box;
    border: 1px solid #ccc;
    border-radius: 0.25rem;
    padding: 0.5rem;
    width: 100%;
    background-color: #fff; /* 确保背景色 */
}
.category-filter select:focus {
    border-color: #1a73e8; 
    outline: 0;
    box-shadow: 0 0 0 0.2rem rgba(26, 115, 232, 0.25);
}


/* (新增) 分页样式 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    list-style: none;
    padding: 0;
    flex-wrap: wrap; /* 允许换行 */
}
.pagination-item {
    margin: 2px;
}
.pagination-link {
    display: block;
    padding: 0.5rem 0.9rem;
    min-width: 40px; /* 确保圆形/方形 */
    box-sizing: border-box;
    text-align: center;
    text-decoration: none;
    color: #1a73e8;
    background-color: #ffffff;
    border: 1px solid #dcdcdc;
    border-radius: 0.3rem;
    transition: background-color 0.15s ease-in-out, border-color 0.15s ease-in-out;
    cursor: pointer;
    font-weight: 500;
}
.pagination-link:hover {
    background-color: #f0f2f5;
    border-color: #1a73e8;
}
.pagination-item.active .pagination-link {
    background-color: #1a73e8;
    color: #ffffff;
    border-color: #1a73e8;
    cursor: default;
}
.pagination-item.disabled .pagination-link {
    color: #9e9e9e;
    background-color: #f9f9f9;
    border-color: #e0e0e0;
    cursor: not-allowed;
}


footer {
    text-align: center;
    padding: 25px;
    background-color: #ffffff;
    color: #5f6368;
    margin-top: auto;
    font-size: 0.9rem;
    border-top: 1px solid #dcdcdc;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .container {
        width: 95%;
        padding: 15px; 
        margin: 15px auto;
    }
    
    /* (修复) 确保 form-container 在移动端时不会有奇怪的边距 */
    .form-container {
        max-width: 100%; /* 移动端占满 */
    }

    header h1 {
        font-size: 1.8rem;
    }
    header nav {
        /* 保持横向排列，允许换行 */
        flex-direction: row; /* 确保是 row */
        flex-wrap: wrap; 
        justify-content: center; 
        gap: 8px; 
    }
    header nav .button-action,
    header nav .button-danger {
        padding: 0.4rem 0.7rem; 
        font-size: 0.85rem;   
        min-height: 32px;    
        flex-grow: 0; 
        flex-shrink: 1; 
    }
    header nav .welcome-user {
        width: 100%; 
        text-align: center;
        margin-bottom: 8px;
        order: -1; /* 让欢迎语优先显示在最上面，如果换行 */
    }


    .button-action:not(.button-header),
    input[type="submit"]:not(.button-header),
    .button-like:not(.button-header),
    .button-danger:not(.button-header) {
        padding: 0.5rem 0.8rem; 
        font-size: 0.9rem;    
        min-height: 36px;     
    }
    

    .form-actions {
        flex-direction: column;
        align-items: stretch;
    }
    .form-actions .button-action, .form-actions .button-danger {
        width: 100%; 
        margin-bottom: 8px; 
    }
    .form-actions .button-action:last-child, 
    .form-actions .button-danger:last-child {
        margin-bottom: 0;
    }
    
    /* (修改) 确保搜索栏和过滤器在移动端能良好堆叠 */
    .toolbar-actions {
        flex-direction: column;
        align-items: stretch;
    }
    .toolbar-actions #searchForm {
        min-width: 100%;
    }
    .toolbar-actions .category-filter {
        min-width: 100%;
    }
    .toolbar-actions #clearSearchButton {
        min-width: 100%;
    }


    .note-item .note-actions {
        flex-direction: row;
        flex-wrap: wrap;
        width: 100%;
        justify-content: flex-start;
        gap: 8px; 
    }
    .note-item .note-actions .button-action,
    .note-item .note-actions .button-danger {
        padding: 0.35rem 0.7rem; 
        font-size: 0.85rem;    
        min-width: 65px;      
    }

    .user-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    .user-item .user-item-actions .button-action,
    .user-item .user-item-actions .button-danger {
        padding: 0.35rem 0.7rem;
        font-size: 0.85rem;
        min-width: auto; 
        flex-grow: 1; 
    }

    /* 移动端富文本工具栏 */
    #richTextToolbar {
        justify-content: flex-start; /* 保持左对齐 */
        gap: 3px; 
        padding: 4px;
    }
    #richTextToolbar > button,
    #richTextToolbar > select,
    #richTextToolbar > input[type="color"] {
        padding: 2px 4px; 
        font-size: 0.75rem; 
        height: 26px; 
    }
    #richTextToolbar > select {
        min-width: 50px;
        max-width: 90px; 
    }
    #richTextToolbar > input[type="color"] {
        width: 26px;
    }
    #richContent {
        min-height: 100px;
        max-height: 250px; 
    }
}

/* 新增：评论区样式 */
.comments-section {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #ccc;
}
#commentsList {
    list-style-type: none;
    padding: 0;
    margin-bottom: 20px;
}
.comment-item {
    border: 1px solid #e0e0e0;
    background: #f9f9f9;
    padding: 12px 15px;
    border-radius: 5px;
    margin-bottom: 10px;
}
.comment-meta {
    font-size: 0.9em;
    color: #555;
    margin-bottom: 5px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.comment-meta strong {
    color: #1a73e8;
    font-size: 1.05em;
}
.comment-meta span {
    font-size: 0.9em;
    color: #777;
    margin-left: 10px;
}
.comment-content {
    word-wrap: break-word;
    margin-bottom: 8px;
    color: #333;
}
.comment-actions {
    text-align: right;
}
/* 评论用的小号删除按钮 */
.button-danger.button-small {
    padding: 0.2rem 0.5rem;
    font-size: 0.8rem;
    min-height: 24px;
    min-width: 50px;
    line-height: 1.4;
}
#commentForm textarea {
    min-height: 80px;
    margin-bottom: 10px;
}
/* 评论表单的按钮间距 */
#commentForm .form-actions {
    margin-top: 0; 
}