/* ===== JetBrains Mono (from new_all.css) ===== */
@import url("https://fonts.googleapis.com/css?family=Open+Sans:300,400,600,400italic,600italic|Roboto+Slab:400,700");
@import url('https://fonts.googleapis.com/css?family=Crimson+Text');
@font-face{
    font-family: 'JetBrains Mono';
    src: url('https://raw.githubusercontent.com/JetBrains/JetBrainsMono/master/fonts/webfonts/JetBrainsMono-Regular.woff2') format('woff2'),
    url('https://raw.githubusercontent.com/JetBrains/JetBrainsMono/master/fonts/ttf/JetBrainsMono-Regular.ttf') format('truetype');
}

/* ===== Astro Today — topic colours ===== */
:root {
  --at-GA:    rgba(44, 126, 212, 1);
  --at-SR:    rgba(255, 215, 0, 1);
  --at-HE:    rgba(255, 69, 0, 1);
  --at-CO:    rgba(34, 139, 34, 1);
  --at-IM:    rgba(105, 105, 105, 1);
  --at-EP:    rgba(139, 69, 19, 1);
  --at-other: rgba(20, 20, 20, 1);
}

/* ===== Sidebar section label ===== */
.sidebar-section-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--sidebar-text-muted);
  margin-bottom: 8px;
}

/* ===== Topic toggle buttons (vertical list) ===== */
.at-topic-toggles {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.at-topic-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 8px;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  color: var(--sidebar-text-muted);
  background: transparent;
  text-align: left;
  transition: background 150ms ease, color 150ms ease;
  width: 100%;
}

.at-topic-btn:hover {
  background: var(--sidebar-hover-bg);
  color: var(--sidebar-text);
}

.at-topic-btn.active {
  color: #fff;
}

.at-topic-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.at-topic-count {
  margin-left: auto;
  font-size: 11px;
  opacity: 0.7;
}

/* ===== Loading ===== */
.at-loading {
  text-align: center;
  padding: 48px 0;
  font-size: 14px;
  color: var(--color-text-muted);
}

/* ===== Paper item ===== */
.at-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid #f0f2f4;
}

.at-item:last-child { border-bottom: none; }

.at-item.collapsed .at-abstract,
.at-item.collapsed .at-authors { display: none; }

/* ===== Hanging number ===== */
.at-num {
  flex-shrink: 0;
  width: 40px;
  text-align: right;
  padding-top: 0;
  line-height: 1.4;
}

.at-num code {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.75em;
  color: var(--color-text-muted);
  background: none;
  border-radius: 0;
  padding: 0;
}

/* ===== Right column ===== */
.at-body {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
}

/* ===== Header row: title ===== */
.at-header {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.at-title-title {
  font-size: 1.1em;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  line-height: 1.4;
}

.at-title-title:hover { color: var(--color-accent); }
.at-title-title.key_matched { color: #0550ae; }

/* ===== Tags row ===== */
.at-title-tags {
  display: flex;
  justify-content: flex-start;
  flex-wrap: wrap;
  font-size: calc(var(--font-size-main, 15px) * 0.8);
  line-height: 1;
  gap: 0;
  margin: 1px 0;
}

.at-tag {
  padding: 0.2em 0.4em;
  border-radius: 0.4em;
  margin-right: 0.2em;
  color: white;
}

.at-arxiv-tag { background-color: brown; }
.at-arxiv-tag:hover { text-decoration: none; color: white; }

/* ===== Authors ===== */
.at-authors {
  font-size: calc(var(--font-size-main, 15px) * 0.82);
  line-height: 1.2;
  font-weight: 400;
  margin: 2px 0;
}

.at-authors a {
  color: rgba(0, 45, 114, 1);
  text-decoration: none;
  border-radius: 3px;
}
.at-authors a:not(:first-child) {
  color: rgba(0, 45, 114, 0.4);
  font-size: calc(var(--font-size-main, 15px) * 0.72);
}
.at-authors a:hover {
  background-color: rgba(123, 176, 210, 0.51);
}
.at-authors a:not(:first-child)::before {
  content: none;
}
.at-authors span {
  color: rgba(0, 45, 114, 0.4);
  font-size: calc(var(--font-size-main, 15px) * 0.72);
}

/* ===== Abstract ===== */
.at-abstract {
  font-size: 1.0em;
  line-height: 1.65;
  color: var(--color-text);
  overflow-x: auto;
  margin-top: 1px;
}

.at-abstract code {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.9em;
}

/* keyword highlight */
mark {
  background: #fff176;
  border-radius: 3px;
  padding: 0 2px;
  font-weight: 700;
  color: #000;
}

/* ===== Date badge in section title ===== */
.at-badge {
  font-size: 12px;
  font-weight: 400;
  color: var(--color-text-muted);
  margin-left: 10px;
  vertical-align: middle;
}

/* ===== Error message ===== */
.at-error {
  padding: 16px;
  background: #fff3f3;
  border: 1px solid #fca5a5;
  border-radius: 6px;
  font-size: 13px;
  color: #b91c1c;
  margin-bottom: 16px;
}

/* ===== Main content font (--font-main from new_all.css) ===== */
.at-body,
.at-title-title,
.at-authors,
.at-abstract {
  font-family: "Open Sans", sans-serif;
}

/* ===== Mobile ===== */
@media (max-width: 768px) {
  .at-item {
    flex-direction: column;
    gap: 2px;
  }

  .at-num {
    width: auto;
    text-align: left;
    line-height: 1.2;
  }

  .at-sidebar {
    width: 100%;
    height: auto;
    position: static;
    display: flex !important;
    flex-direction: column;
    padding: 16px 16px 12px;
  }

  .at-sidebar .sidebar-name,
  .at-sidebar .sidebar-affiliation,
  .at-sidebar .sidebar-section-label,
  #at-date-badge,
  .at-sidebar > .sidebar-divider,
  .at-sidebar > a.sidebar-link {
    display: none;
  }

  .at-topic-toggles {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 4px;
    padding-top: 0;
    border-top: none;
  }

  .at-topic-btn {
    width: auto;
    padding: 4px 8px;
    gap: 6px;
    font-size: 12px;
  }

  .at-topic-count {
    display: none;
  }
}