/* Author avatar: force a true 200x200 square at every breakpoint.
   The theme (minimal-mistakes _sidebar.scss) applies:
     .author__avatar     { width: 36px; height: 36px }   (below $large)
     .author__avatar img { max-width: 110px; border-radius: 50% }
     .author__avatar img { padding: 5px; border: 1px solid #f2f3f3 } ($large)
   The `max-width: 110px` is what clamps the image, so it must be reset
   alongside width/height; padding + border are zeroed so the rendered
   image box is exactly 200x200. */
.author__avatar {
  display: block !important;
  width: 200px !important;
  height: 200px !important;
}

.author__avatar img {
  width: 200px !important;
  height: 200px !important;
  max-width: none !important;
  padding: 0 !important;
  border: 0 !important;
  border-radius: 0 !important;
  object-fit: cover;
}

/* Even vertical rhythm in the author sidebar: the gap below the name
   matches the gap between links (a uniform 8px box-to-box).
   `.sidebar .author__name` is needed to beat the theme's
   `.sidebar h3 { margin-bottom: 0 }`; the links get padding-block: 0
   so their 8px margin-bottom is the whole gap. */
.sidebar .author__name {
  margin-bottom: 8px;
}

.author__urls a {
  margin-bottom: 8px;
  padding-block: 0;
}

/* ==========================================================================
   Research timeline
   Vertical continuous rail · circular year nodes · projects branch right.
   ========================================================================== */

.rt {
  /* geometry */
  --rt-rail: 104px;          /* width reserved for the year column            */
  --rt-gap: 26px;            /* horizontal branch length (node -> project)    */
  --rt-line: 2px;            /* rail / tick thickness                         */
  --rt-thumb-w: 120px;       /* fixed collapsed thumbnail size                */
  --rt-thumb-h: 84px;
  --rt-row-center: 42px;     /* vertical center of a project row (thumb-h/2)  */

  /* palette */
  --rt-rule: rgba(29, 33, 39, 0.18);
  --rt-accent: #1d2127;
  --rt-bg: #ffffff;
  --rt-media-bg: #f5f5f5;
  --rt-strong: #1b1d20;
  --rt-body: #2d3136;
  --rt-muted: rgba(29, 33, 39, 0.6);

  position: relative;
  max-width: 720px;
  margin: 2rem 0 0;
}

/* ---- year block + continuous vertical line ------------------------------- */
.rt__year {
  position: relative;
  padding-left: calc(var(--rt-rail) + var(--rt-gap));
  padding-bottom: 34px;
}

.rt__year:last-child {
  padding-bottom: 0;
}

/* each year paints its own segment of the rail; stacked they form one line  */
.rt__year::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: var(--rt-rail);
  width: var(--rt-line);
  background: var(--rt-rule);
  transform: translateX(-50%);
}

.rt__year:first-child::before {
  top: var(--rt-row-center);
}

.rt__year:last-child::before {
  bottom: calc(100% - var(--rt-row-center));
}

/* ---- year label + circular node --------------------------------------- */
.rt__year-label {
  position: absolute;
  left: 0;
  top: var(--rt-row-center);
  width: calc(var(--rt-rail) - 18px);
  text-align: right;
  transform: translateY(-50%);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--rt-strong);
}

.rt__node {
  position: absolute;
  left: var(--rt-rail);
  top: var(--rt-row-center);
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--rt-accent);
  box-shadow: 0 0 0 4px var(--rt-bg);
  transform: translate(-50%, -50%);
}

/* ---- projects branching to the right --------------------------------- */
.rt__projects {
  position: relative;
}

.rt__project {
  position: relative;
}

.rt__project:not(:last-child) {
  margin-bottom: 20px;
}

/* horizontal connector from the rail to each project row */
.rt__tick {
  position: absolute;
  left: calc(-1 * var(--rt-gap));
  top: var(--rt-row-center);
  width: var(--rt-gap);
  height: var(--rt-line);
  background: var(--rt-rule);
}

/* ---- collapsed row: thumb + title + tags + toggle ------------------- */
.rt__row {
  display: flex;
  align-items: center;
  gap: 16px;
  width: 100%;
  margin: 0;
  padding: 0;
  background: transparent;
  border: 0;
  font: inherit;
  color: inherit;
  text-align: left;
  cursor: pointer;
}

.rt__thumb {
  flex: 0 0 auto;
  width: var(--rt-thumb-w);
  height: var(--rt-thumb-h);
  object-fit: contain;
  padding: 4px;
  background: var(--rt-media-bg);
  border: 1px solid var(--rt-rule);
  border-radius: 6px;
}

.rt__meta {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.rt__title {
  font-size: 1.02rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--rt-strong);
  overflow-wrap: break-word;
}

.rt__row:hover .rt__title {
  text-decoration: underline;
}

.rt__tags {
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--rt-muted);
}

.rt__toggle-icon {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: 1px solid var(--rt-rule);
  border-radius: 6px;
  background: var(--rt-bg);
  font-size: 1.15rem;
  line-height: 1;
  color: var(--rt-strong);
}

.rt__row:hover .rt__toggle-icon,
.rt__row:focus-visible .rt__toggle-icon {
  border-color: var(--rt-accent);
}

.rt__row:focus-visible {
  outline: 2px solid var(--rt-accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---- expanded detail (one open at a time, toggled via .is-open) ----- */
.rt__detail {
  display: none;
  padding: 14px 0 4px;
}

.rt__project.is-open .rt__detail {
  display: block;
}

.rt__detail-img {
  display: block;
  width: 100%;
  max-width: 460px;
  max-height: 300px;
  object-fit: contain;
  margin-bottom: 12px;
  padding: 6px;
  background: var(--rt-media-bg);
  border: 1px solid var(--rt-rule);
  border-radius: 6px;
}

.rt__summary {
  margin: 0 0 10px;
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--rt-body);
}

/* Methods / Papers / Code groups shown side by side in the expanded card */
.rt__resources {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 26px;
  margin-top: 4px;
}

.rt__resgroup {
  display: flex;
  flex-direction: column;
  gap: 7px;
  min-width: 0;
}

.rt__reslabel {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--rt-muted);
}

.rt__reslist {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.rt__reslist li {
  display: flex;
}

/* plain (non-link) pills — used for Methods */
.rt__reslist--plain li {
  font-size: 0.8rem;
  line-height: 1.4;
  padding: 2px 10px;
  color: var(--rt-body);
  border: 1px solid var(--rt-rule);
  border-radius: 999px;
}

/* link pills — used for Papers and Code */
.rt__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  line-height: 1.4;
  padding: 3px 11px;
  color: var(--rt-body);
  text-decoration: none;
  border: 1px solid var(--rt-rule);
  border-radius: 999px;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.rt__link i {
  font-size: 0.85em;
  opacity: 0.65;
}

a.rt__link:hover,
a.rt__link:focus-visible {
  border-color: var(--rt-accent);
  background: var(--rt-media-bg);
  color: var(--rt-strong);
}

a.rt__link:focus-visible {
  outline: 2px solid var(--rt-accent);
  outline-offset: 2px;
}

/* listed but no URL yet (e.g. an accepted paper without a link) */
.rt__link--pending {
  color: var(--rt-muted);
  border-style: dashed;
  cursor: default;
}

/* ---- mobile: keep the vertical timeline, tighten the geometry ------- */
@media (max-width: 640px) {
  .rt {
    --rt-rail: 54px;
    --rt-gap: 12px;
    --rt-thumb-w: 72px;
    --rt-thumb-h: 52px;
    --rt-row-center: 26px;
  }

  .rt__year-label {
    width: calc(var(--rt-rail) - 20px);
    font-size: 0.76rem;
  }

  .rt__row {
    gap: 8px;
  }

  .rt__node {
    width: 12px;
    height: 12px;
    box-shadow: 0 0 0 3px var(--rt-bg);
  }

  .rt__title {
    font-size: 0.95rem;
  }

  .rt__toggle-icon {
    width: 24px;
    height: 24px;
    font-size: 1rem;
  }

  .rt__detail-img {
    max-width: 100%;
  }
}