/****************************************
 * lunarxiv · 全局样式
 * 参考：arXiv.css, browse_search.css, abs.css, arXiv-print.css
 ****************************************/

/****************************************
 *  全局基础
 ****************************************/
body {
  margin: 0;
  padding: 0;
  background-color: #fff;
  color: #000;
  font-family: "Lucida Grande", helvetica, arial, verdana, sans-serif;
  line-height: 1.4;
  position: relative;
}

/* 全页固定背景图：不随滚动、填满视口、右对齐裁切左侧、约 10% 浓度 */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: -1;
  background-image: url("../assets/image/background.jpg");
  background-size: cover;
  background-position: right center;
  background-repeat: no-repeat;
  opacity: 0.05;
  pointer-events: none;
}

a:link,
a:visited,
a:active {
  text-decoration: none;
  font-weight: normal;
}

a:hover {
  text-decoration: underline;
}

img {
  border: 0;
}

/****************************************
 *  顶部黑条（桌面显示：校徽 + 校名 + 致谢）
 ****************************************/
.header-top {
  font-family: verdana, arial, helvetica, sans-serif;
  color: #fff;
  background-color: #222;
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 20px;
  min-height: 60px;
  box-sizing: border-box;
}

.header-top-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-top-right {
  margin-left: auto;
  font-size: 0.9rem;
  font-weight: normal;
  text-align: right;
}

/* 桌面黑条内徽标与校名更大 */
.header-crest {
  height: 50px;
  width: auto;
  display: block;
}

.header-school-name {
  font-family: Georgia, "Times New Roman", Times, serif;
  font-size: 1.35em;
  font-weight: normal;
}

/****************************************
 *  红色顶栏（logo、校徽校名、搜索、菜单）
 ****************************************/
.header-bottom {
  background-color: #b31b1b;
  color: #fff;
  margin: 0;
  padding: 10px 20px;
  min-height: 60px;
  border-bottom: 2px solid #ccc;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  align-content: center;
  gap: 0;
  box-sizing: border-box;
}

.header-bottom > * {
  align-self: center;
}

/* 宽屏（两栏都出现）时黑条与红条等高 */
@media screen and (min-width: 769px) {
  .header-top,
  .header-bottom {
    min-height: 60px;
    height: 60px;
    align-items: center;
    align-content: center;
  }
}

.header-bottom .logo {
  margin: 0;
  font-size: 2em;
  font-weight: bold;
  font-style: normal;
  color: #fff;
  letter-spacing: -1px;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  line-height: 1;
}

.header-bottom a.logo:hover {
  text-decoration: none;
  opacity: 0.9;
}

/* lunarXiv 图文混排商标：lunar + 图 + iv */
.logo-brand {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 0.1em;
}

.logo-word {
  font-family:
    "Larabiefont", "Larabie", "Lucida Grande", helvetica, arial, sans-serif;
  font-weight: bold;
  color: inherit;
  line-height: 1;
}

.logo-img {
  height: 0.9em;
  width: auto;
  display: block;
}

/* 宽屏（501px 及以上）lunarXiv logo 整体约 1.2 倍大 */
@media screen and (min-width: 501px) {
  .header-bottom .logo {
    font-size: 2.4em;
  }
}

/* 竖向分割线：平板时在 arXiv 与校徽校名之间显示 */
.header-divider {
  display: none;
  width: 0;
  height: 44px;
  border-left: 1px solid #fc5554;
  border-right: 1px solid #731515;
  margin: 0 1em;
  flex-shrink: 0;
}

/* 红条内校徽+校名：平板显示，手机仅校徽 */
.header-university {
  display: none;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.header-crest-inline {
  height: 45px;
  width: auto;
  display: block;
}

.header-university-name {
  font-family: Georgia, "Times New Roman", Times, serif;
  font-size: 1rem;
  color: #fff;
  white-space: nowrap;
}

/* 顶栏搜索框 */
.header-search-box {
  display: flex;
  justify-content: flex-end;
  margin-left: auto;
  padding: 0;
  font-size: 0.8em;
  line-height: 100%;
  flex-shrink: 0;
}

.header-search-box input,
.header-search-box select {
  margin: 0;
  padding: 0 0.5em;
}

.header-search-box input {
  font-size: 12px;
  line-height: 1.5;
  height: 2.25em;
  border-radius: 2px;
  border: 1px solid #95989a;
  box-shadow: inset 0 1px 2px rgba(10, 10, 10, 0.1);
  width: 200px;
  max-width: 100%;
}

.header-search-box button {
  font-size: 12px;
  line-height: 1.5;
  height: 2.25em;
  border-radius: 2px;
  border: 1px solid #95989a;
  background-color: #711111;
  color: #fff;
  padding: 0 0.5em;
  cursor: pointer;
  margin-left: 0;
}

.header-search-box button:hover,
.header-search-box button:focus {
  background-color: #440a0a;
  color: #fff;
}

/* 菜单按钮：仅手机显示 */
.header-menu-btn {
  display: none;
  color: #fff;
  font-size: 1.5rem;
  padding: 0.25em 0.4em;
  line-height: 1;
  text-decoration: none;
  align-items: center;
  justify-content: center;
}

.header-menu-btn:hover {
  text-decoration: none;
  opacity: 0.9;
}

/****************************************
 *  首页主内容区（列表、标题、摘要等来自 data，使用中文衬线字体）
 ****************************************/
.main-container {
  margin: 0.7em;
  font-size: 90%;
  max-width: 1000px;
  margin-left: auto;
  margin-right: auto;
  padding: 20px;
  font-family: "Noto Serif SC", "Noto Serif CJK SC", "Source Han Serif CN", SimSun, "Songti SC", Georgia, "Times New Roman", serif;
}

h1.page-title {
  font-weight: normal;
  font-size: 22px;
  margin-bottom: 20px;
  text-align: center;
}

/****************************************
 *  分页
 ****************************************/
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 20px 0;
  font-size: 14px;
}

.pagination-list {
  list-style: none;
  padding: 0;
  margin: 0 20px 0 0;
  display: flex;
  gap: 5px;
  flex-wrap: wrap;
}

.page-link {
  padding: 5px 10px;
  border: 1px solid #ccc;
  color: #333;
  border-radius: 3px;
}

.page-link.active {
  background-color: #0055aa;
  color: white;
  border-color: #0055aa;
}

.page-link:hover:not(.active) {
  background-color: #eee;
  text-decoration: none;
}

.pagination .page-link.disabled {
  pointer-events: none;
  background-color: #e0e0e0;
  color: #999;
}

/****************************************
 *  论文列表项
 ****************************************/
.results-list {
  list-style: none;
  padding: 0;
}

.result-item {
  margin-bottom: 30px;
  padding-bottom: 0;
}

.list-identifier {
  margin-bottom: 4px;
  font-size: 15px;
}

.list-identifier a,
.arxiv-id-link {
  font-weight: bold;
  color: #0000ff;
}

.format-links {
  font-size: 14px;
  color: #000;
}

.format-links a {
  color: #0000ff;
}

.tag-container {
  display: inline-block;
  margin-left: 10px;
}

.tag {
  background-color: #dbeaf0;
  color: #003366;
  padding: 2px 6px;
  font-size: 12px;
  border-radius: 2px;
  font-family: monospace;
  margin-right: 4px;
}

.tag.secondary {
  background-color: #f0f0f0;
  color: #666;
}

.list-title {
  font-size: large;
  font-weight: bold;
  margin: 0.25em 0 0 0;
  line-height: 120%;
}

.list-authors {
  font-weight: normal;
  font-size: 110%;
}

.author-name {
  color: #0000ff;
}

.abstract {
  font-size: 14px;
  margin-bottom: 8px;
  text-align: justify;
}

.abstract-prefix {
  font-weight: bold;
}

.submission-history,
.comments {
  font-weight: normal;
  font-size: 90%;
  color: #000;
  margin-bottom: 2px;
}

.meta-label {
  font-weight: bold;
}

/* 加载中 / 错误态 */
.loading {
  font-style: italic;
  color: #555;
  margin: 1rem 0;
}

.paper-not-found {
  text-align: center;
  padding: 2rem;
  border: 1px solid #ddd;
  border-radius: 4px;
  background: #f8f8f8;
}

.paper-not-found h2 {
  font-size: 20px;
  color: #b31b1b;
  margin: 0 0 0.75rem 0;
}

.paper-not-found p {
  margin: 0 0 1rem 0;
  color: #333;
}

.paper-not-found a {
  color: #0000ff;
}

/****************************************
 *  详情页布局（主栏 + 侧栏）
 ****************************************/
.content-wrapper {
  margin: -0.7em;
  margin-top: 0;
  max-width: 1000px;
  margin-left: auto;
  margin-right: auto;
  padding: 1.5em 20px 0;
  overflow: auto;
}

/* 详情主栏：标题、作者、摘要等来自 data，使用中文衬线字体 */
.main-column {
  margin: 0 0 1em 0;
  padding: 0;
  width: calc(100% - 18em);
  float: left;
  min-width: 0;
  font-family: "Noto Serif SC", "Noto Serif CJK SC", "Source Han Serif CN", SimSun, "Songti SC", Georgia, "Times New Roman", serif;
}

/* 侧栏 extra-services (arXiv.css .extra-services) */
.sidebar {
  float: right;
  margin: 0;
  width: 18em;
  font-size: 14px;
  border-left: 0.35em solid #ddd;
  padding-left: 0.5em;
}

.header-breadcrumbs {
  font-size: 14px;
  margin: 0 0 20px 20px;
  color: #333;
}

/* 详情页文章标题 */
h1.paper-title {
  display: block;
  font-size: 1.8em !important;
  font-weight: 700;
  margin: 12px 0 12px 20px;
  line-height: 120%;
}

/* 详情页作者行 */
.detail-authors {
  font-size: 1.2em;
  line-height: 24px;
  margin: 8px 0 8px 20px;
}

.detail-authors a {
  font-size: medium;
}

/* 摘要块：与标题/作者左对齐 20px，背景透明 */
.abstract-block {
  font-size: 1.05em;
  line-height: 1.55;
  margin: 14px 20px 21px 20px;
  background-color: transparent;
  border: none;
  padding: 0;
}

.abstract-block .abstract-prefix {
  font-weight: bold;
  display: block;
  margin-bottom: 5px;
}

.abstract-text {
  text-align: justify;
}

/* 详情页元数据表格 */
.metatable {
  font-size: 0.95em !important;
  line-height: 1.5;
  margin: 0 0 1.5em 20px;
  width: 100%;
  border-spacing: 0;
}

.metatable td {
  padding: 0.1em 0.5em 0 0;
  vertical-align: top;
}

.table-label {
  font-weight: 400 !important;
  color: #333;
  white-space: nowrap;
  text-align: right;
  width: 100px;
}

/* 侧栏各个区块 */
.sidebar-box {
  margin-bottom: 0;
  padding: 0.5em 1em 0.5em 0;
  font-size: 90%;
  border-bottom: medium solid #ddd;
  border-left: none;
}

.sidebar-header {
  font-size: 140%;
  font-weight: bold;
  margin: 0.1em 0 0 0;
  padding-bottom: 5px;
  margin-bottom: 10px;
  color: #333;
  text-transform: none;
  letter-spacing: 0;
  border-bottom: 1px solid #ddd;
}

.access-paper-list {
  list-style: none;
  padding: 0;
  margin: 0.3em 0 0 0;
}

.access-paper-list li {
  margin-bottom: 8px;
}

.download-btn {
  background-color: #fff;
  border: 1px solid #ccc;
  padding: 5px 10px;
  display: block;
  text-decoration: none;
  color: #333;
  border-radius: 3px;
  transition: background 0.2s;
}

.download-btn:hover {
  background-color: #f0f0f0;
  text-decoration: none;
  border-color: #bbb;
}

.browse-context {
  font-size: 13px;
}

.browse-context .browse-sep {
  margin: 0 5px;
  color: #999;
}

.browse-nav {
  margin: 5px 0;
  padding: 0.2em 0 0 0;
}

/* 详情页 Submission history 区块 */
.submission-history-block {
  margin: 1.5em 0 1.5em 20px;
  font-size: 90%;
  line-height: 1.5em;
}

.submission-history-block h3 {
  font-size: 120%;
  margin: 0 0 0.25em 0;
  font-weight: bold;
  border-bottom: 1px solid #ddd;
  padding-bottom: 5px;
}

.submission-history-block p {
  font-size: inherit;
  color: #333;
  margin: 0;
  font-family: "Lucida Grande", helvetica, arial, verdana, sans-serif;
}

/****************************************
 *  页脚
 ****************************************/
footer {
  background-color: hsl(0, 0%, 95%);
  color: #000;
  padding: 1em 2em;
  font-size: 0.9rem;
  -webkit-font-smoothing: antialiased;
  margin-top: 6rem;
  border-top: 1px solid #ddd;
  clear: both;
  overflow: hidden;
}

footer a,
footer a:visited {
  color: #000;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  line-height: 1.75em;
}

footer a:hover,
footer a:active {
  color: #005e9d;
  border-bottom: 1px dotted #005e9d;
  text-decoration: none;
}

footer ul {
  padding: 0;
  margin: 0;
}

/* 三列均匀分布 */
.footer-content {
  max-width: 1000px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  gap: 2em;
}

.footer-col {
  flex: 1;
  min-width: 0;
  text-align: center;
}

.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-col li {
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}

.footer-col a {
  font-size: 13.5px;
  color: #000;
}

.icon-mock {
  display: inline-block;
  width: 14px;
  text-align: center;
  margin-right: 5px;
}

/* 页脚弹窗：风格与页面一致 */
.footer-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1em;
  visibility: hidden;
  opacity: 0;
  transition: visibility 0.2s, opacity 0.2s;
}

.footer-modal.is-open {
  visibility: visible;
  opacity: 1;
}

.footer-modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  cursor: pointer;
}

.footer-modal-box {
  position: relative;
  max-width: 520px;
  width: 100%;
  max-height: 85vh;
  overflow: auto;
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 6px;
  padding: 1.5em 2em 2em;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  font-family: "Noto Serif SC", "Noto Serif CJK SC", SimSun, "Songti SC", Georgia, serif;
  font-size: 14px;
  line-height: 1.65;
  color: #333;
}

.footer-modal-close {
  position: absolute;
  top: 0.1em;
  right: 0.1em;
  width: 2em;
  height: 2em;
  padding: 0;
  border: none;
  background: transparent;
  font-size: 1.5rem;
  line-height: 1;
  color: #666;
  cursor: pointer;
}

.footer-modal-close:hover {
  color: #000;
}

.footer-modal-body p {
  margin: 0 0 0.75em 0;
}

.footer-modal-body p:last-child {
  margin-bottom: 0;
}

.footer-modal-body a {
  color: #005e9d;
  text-decoration: none;
  border-bottom: 1px dotted #005e9d;
}

.footer-modal-body a:hover {
  border-bottom-style: solid;
}

/****************************************
 *  响应式：≤768px 平板（隐藏黑条，红条内 logo | 竖线 | 校徽+校名）
 ****************************************/
@media screen and (max-width: 768px) {
  .header-top {
    display: none !important;
  }

  .header-bottom {
    padding: 10px 15px;
  }

  .header-divider {
    display: block;
  }

  .header-university {
    display: flex;
  }

  .header-search-box {
    margin-left: auto;
  }

  .header-search-box input {
    display: none;
  }

  .header-search-box button {
    display: none;
  }

  .header-menu-btn {
    display: flex;
    flex-shrink: 0;
  }
}

/****************************************
 *  响应式：≤500px 手机（红条仅：logo 图 | 校徽 | 搜索 | 菜单）
 ****************************************/
@media screen and (max-width: 500px) {
  .header-bottom {
    height: 80px;
    min-height: 80px;
    align-items: center;
    padding: 0 0.5em;
  }

  /* 500px 以下仍保留网站图标与学校图标之间的竖线 */
  .header-divider {
    display: block;
  }

  /* 仅保留校徽，校名隐藏 */
  .header-university-name {
    display: none;
  }

  /* logo 仅保留中间图片：lunar 与 iv 隐藏，img 缩放与校徽一致（固定高度） */
  .header-bottom .logo .logo-word {
    display: none !important;
  }

  .header-bottom .logo-img {
    height: 73px;
    width: auto;
    display: block;
  }

  .header-university {
    display: flex;
  }

  .header-crest-inline {
    height: 73px;
  }

  .header-search-box {
    margin-left: auto;
  }

  .header-search-box input {
    width: 120px;
    max-width: 40vw;
    font-size: 11px;
  }

  .header-menu-btn {
    display: flex;
    flex-shrink: 0;
  }

  /* 主内容区窄屏微调（原 481px 逻辑合并） */
  .main-container {
    padding: 10px 8px;
  }

  .list-title {
    font-size: 1rem;
  }

  .content-wrapper {
    padding: 1.5em 0.5em 0;
  }

  .abstract-block {
    margin-left: 0.5em;
    margin-right: 0.5em;
  }
}

/****************************************
 *  响应式：≤768px 主内容、详情、侧栏、页脚
 ****************************************/
@media screen and (max-width: 768px) {
  .header-bottom .logo {
    text-align: left;
  }

  .header-search-box input {
    width: 100%;
    max-width: 280px;
  }

  .main-container {
    margin: 0.7em;
    padding: 15px 10px;
  }

  .pagination {
    flex-wrap: wrap;
    justify-content: center;
  }

  .pagination-list {
    margin: 0 10px 5px 0;
  }

  /* 详情页窄屏布局 */
  .content-wrapper {
    margin: 0;
    padding: 1.5em 1em 0;
    flex-direction: column;
    display: block;
  }

  .main-column {
    width: 100%;
    float: left;
    margin: 0 0 1em 0;
  }

  .sidebar {
    width: 100%;
    float: left;
    border-left: 0;
    padding: 1em 0;
    margin: 0 0 1em 0;
    -webkit-box-shadow: inset 0px 8px 15px 0px rgba(173, 173, 173, 1);
    box-shadow: inset 0px 8px 15px 0px rgba(173, 173, 173, 1);
    background-color: #e6e6e6;
  }

  .sidebar-box {
    border: 0;
    font-size: 12px;
    padding: 0.5em 1em;
  }

  .sidebar-header {
    font-size: 15px;
    margin-bottom: 0.5em;
  }

  .header-breadcrumbs {
    margin: 0.25em 0 0.5em 0;
    font-size: 0.85em;
  }

  h1.paper-title {
    margin: 0 0 0.25em 0;
    padding-left: 0;
    font-size: 1.5em;
  }

  .detail-authors {
    margin: 1em 0 0 0;
    font-size: 0.9em;
  }

  .abstract-block {
    margin: 0.5em 0 1em 0;
  }

  .metatable {
    margin: 0.75em 0 1.5em 1.5em;
  }

  .submission-history-block {
    padding: 1em;
    margin: 0;
    background-color: #f5f5f5;
    -webkit-box-shadow: inset 0px -6px 15px 0px rgba(219, 219, 219, 1);
    box-shadow: inset 0px -6px 15px 0px rgba(219, 219, 219, 1);
  }

  .submission-history-block h3 {
    font-size: 1em;
  }

  /* 窄屏侧栏下载按钮样式 */
  .sidebar .download-btn {
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0.7em 0.25em;
    border-radius: 10px;
    background-color: #408bd0;
    padding: 0.25em 1em;
    font-weight: 800;
    color: white;
    text-decoration: none;
    font-size: 20px;
    text-align: center;
  }

  .sidebar .download-btn:hover {
    background-color: #2a6fb0;
    color: white;
  }

  .footer-content {
    flex-direction: column;
    gap: 1em;
  }

  footer {
    margin-top: 3rem;
    padding: 1em;
  }
}

/****************************************
 *  打印样式
 ****************************************/
@media print {
  .header-top,
  .header-search-box,
  .pagination,
  #pagination,
  #pagination-bottom,
  .sidebar {
    display: none !important;
  }

  .main-column {
    width: 100%;
  }

  .header-breadcrumbs {
    font-size: 18px;
  }
}