/* ==========================================================================
   components.css — buttons, chips, cards, filters, timeline, dialogs.
   jankovic.phd
   ========================================================================== */

/* ---- Buttons ---- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  height: 40px; padding-inline: 20px; border-radius: var(--radius-btn);
  font-family: var(--font-display); font-weight: 500; font-size: var(--text-sm);
  text-decoration: none; white-space: nowrap; user-select: none;
  transition: background-color var(--dur-2) var(--ease-out), color var(--dur-2) var(--ease-out),
              border-color var(--dur-2) var(--ease-out), translate var(--dur-1) var(--ease-out);
}
.btn .icon { width: 16px; height: 16px; }
.btn:active { translate: 0 0; scale: 0.98; }

.btn--primary { background: var(--accent-primary); color: var(--text-on-accent); }
.btn--primary:hover { background: var(--accent-primary-hover); color: var(--text-on-accent); translate: 0 -1px; }

.btn--secondary { background: transparent; border: 1px solid var(--border-strong); color: var(--text-body); }
.btn--secondary:hover { border-color: var(--accent-primary); color: var(--text-body); translate: 0 -1px; }

.btn--ghost {
  background: transparent; color: var(--text-muted); height: 34px; padding-inline: 12px;
  border-radius: var(--radius-btn); font-family: var(--font-body); font-weight: 500;
}
.btn--ghost:hover { background: var(--surface-raised); color: var(--text-heading); }

/* Square icon button (profile links row, toolbar) */
.icon-btn {
  display: inline-grid; place-items: center; width: 40px; height: 40px;
  border-radius: var(--radius-btn); border: 1px solid var(--border-hairline);
  color: var(--text-muted); text-decoration: none;
  transition: color var(--dur-1) var(--ease-spring), border-color var(--dur-1) var(--ease-out),
              background-color var(--dur-1) var(--ease-out), transform var(--dur-1) var(--ease-spring);
}
.icon-btn .icon { width: 20px; height: 20px; }
.icon-btn:hover { color: var(--text-heading); border-color: var(--border-strong); background: var(--surface-raised); }
@media (hover: hover) { .icon-btn:hover { transform: scale(1.1) rotate(-4deg); } }

/* ---- Chips / badges ---- */
.chip {
  display: inline-flex; align-items: center; gap: 5px;
  height: 24px; padding-inline: 10px; border-radius: var(--radius-pill);
  font-size: var(--text-xs); font-weight: 500; letter-spacing: 0.02em;
  border: 1px solid var(--border-hairline); color: var(--text-muted);
  white-space: nowrap;
}
.chip .icon { width: 12px; height: 12px; }

.chip--article  { color: var(--badge-article-text);  background: var(--badge-article-bg);  border-color: var(--badge-article-border); }
.chip--preprint { color: var(--badge-preprint-text); background: var(--badge-preprint-bg); border-color: var(--badge-preprint-border); }
.chip--proceedings { color: var(--badge-proc-text);  background: var(--badge-proc-bg);     border-color: var(--badge-proc-border); }
.chip--thesis   { color: var(--badge-topic-text);    background: var(--badge-topic-bg);    border-color: var(--badge-topic-border); }
.chip--topic    { color: var(--badge-topic-text);    background: var(--badge-topic-bg);    border-color: var(--badge-topic-border); }
.chip--award    { color: var(--badge-award-text);    background: var(--badge-award-bg);    border-color: var(--badge-award-border); }
.chip--invited  { color: var(--badge-preprint-text); background: var(--badge-preprint-bg); border-color: var(--badge-preprint-border); }
.chip--contributed { color: var(--badge-proc-text);  background: var(--badge-proc-bg);     border-color: var(--badge-proc-border); }
.chip--seminar  { color: var(--badge-article-text);  background: var(--badge-article-bg);  border-color: var(--badge-article-border); }

/* Interactive filter chip */
.chip--filter { cursor: pointer; height: 28px; background: transparent; color: var(--text-muted);
  transition: border-color var(--dur-1) var(--ease-out), background-color var(--dur-1) var(--ease-out),
              color var(--dur-1) var(--ease-out); }
.chip--filter:hover { border-color: var(--accent-primary); color: var(--text-body); }
.chip--filter[aria-pressed="true"] { background: var(--accent-primary); border-color: var(--accent-primary); color: var(--text-on-accent); }

/* ---- Cards ---- */
.card {
  background: var(--surface-card);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  transition: translate var(--dur-2) var(--ease-out), border-color var(--dur-2) var(--ease-out),
              border-width var(--dur-1) var(--ease-out), box-shadow var(--dur-2) var(--ease-out);
}

/* Filter-match highlighting (all-publications list):
   full match (every selected filter) = accent border + thicker;
   partial match (at least one filter) = thicker border only. */
.pub-card--partial { border-width: 2px; }
.pub-card--full { border-width: 2px; border-color: var(--accent-primary); }
@media (hover: hover) {
  .card--hover.pub-card--full:hover { border-color: var(--accent-primary-hover); }
}
@media (hover: hover) {
  .card--hover:hover { translate: 0 -4px; border-color: var(--border-strong); box-shadow: var(--shadow-card-hover); }
}

/* Research topic card (a link: clicking opens the filtered publications list) */
.topic-card { padding: var(--space-5); display: grid; gap: var(--space-2); align-content: start;
  text-decoration: none; color: inherit; }
.topic-card .icon { width: 28px; height: 28px; color: var(--text-eyebrow); }
.topic-card h3 { font-size: var(--text-lg); color: var(--text-body); transition: color var(--dur-2) var(--ease-out); }
.topic-card p { font-size: var(--text-sm); color: var(--text-muted); }
.topic-card__more { display: inline-flex; align-items: center; gap: 6px; margin-top: var(--space-2);
  font-size: var(--text-xs); font-weight: 500; color: var(--text-link); }
.topic-card__more .icon { width: 14px; height: 14px; color: inherit; }
@media (hover: hover) {
  .topic-card:hover h3 { color: var(--text-heading); }
  .topic-card:hover .topic-card__more { color: var(--text-link-hover); }
}

/* ---- Publication card ---- */
.pub-card { display: flex; flex-direction: column; overflow: hidden; }

.thumb { position: relative; aspect-ratio: 21 / 10; overflow: hidden;
  border-bottom: 1px solid var(--border-hairline);
  border-radius: calc(var(--radius-card) - 1px) calc(var(--radius-card) - 1px) 0 0;
  background: var(--surface-raised); }
.thumb img { width: 100%; height: 100%; object-fit: cover; object-position: top;
  filter: var(--thumb-dim); transition: filter var(--dur-3) var(--ease-out), scale var(--dur-3) var(--ease-out); }
@media (hover: hover) {
  .pub-card:hover .thumb img { filter: var(--thumb-dim-hover); scale: 1.04; }
}
.thumb--placeholder { display: grid; place-items: center; align-content: center; gap: 6px;
  border-top: 3px solid var(--accent-primary); text-align: center; padding: var(--space-4); }
.thumb--placeholder .icon { width: 40px; height: 40px; color: var(--text-muted); opacity: 0.35; }
.thumb--placeholder .venue { font-family: var(--font-display); font-size: var(--text-sm);
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-muted); }

.pub-card__body { padding: var(--space-5); display: grid; gap: var(--space-2); flex: 1; align-content: start; }
.pub-card__meta { display: flex; align-items: center; gap: var(--space-2); flex-wrap: wrap; }
.pub-card__meta .year { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--text-muted); margin-left: auto; }
.pub-card__title { font-size: var(--text-lg); line-height: 1.35; }
.pub-card__title a { color: var(--text-body); text-decoration: none; }
.pub-card__title a:hover { color: var(--text-link); }
.pub-card__authors { font-size: var(--text-sm); color: var(--text-muted); }
.pub-card__authors .me { font-weight: 600; color: var(--text-body); }
.pub-card__venue { font-size: var(--text-sm); font-style: italic; color: var(--text-muted); }
.pub-card__topics { display: flex; gap: 6px; flex-wrap: wrap; }
.pub-card__actions { display: flex; gap: 4px; flex-wrap: wrap; margin-top: auto; padding-top: var(--space-2); }
.pub-card__actions .btn--ghost { font-size: var(--text-xs); height: 30px; padding-inline: 10px; gap: 6px; }
.pub-card__actions .icon { width: 14px; height: 14px; }

/* Copy feedback */
.copy-btn.is-copied { color: var(--badge-article-text); }

/* ---- Publications: filter bar ---- */
.filter-bar {
  position: sticky; top: calc(var(--nav-height) + 8px); z-index: 50;
  background: var(--bg-subtle); border: 1px solid var(--border-hairline);
  border-radius: var(--radius-card); padding: var(--space-3) var(--space-4);
  display: grid; gap: var(--space-3); margin-bottom: var(--space-6);
}
.filter-bar__search { position: relative; }
.filter-bar__search .icon { position: absolute; left: 12px; top: 50%; translate: 0 -50%;
  width: 16px; height: 16px; color: var(--text-muted); pointer-events: none; }
.filter-bar__search input {
  width: 100%; height: 40px; padding: 0 12px 0 38px;
  background: var(--bg-page); border: 1px solid var(--border-strong); border-radius: var(--radius-btn);
  color: var(--text-body); font-size: var(--text-sm);
  transition: border-color var(--dur-1) var(--ease-out);
}
.filter-bar__search input::placeholder { color: var(--text-muted); }
.filter-bar__search input:focus { border-color: var(--accent-interactive); outline: none; }
.filter-bar fieldset { border: none; padding: 0; margin: 0; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.filter-bar legend { float: left; margin-right: 4px; padding: 0; font-family: var(--font-display);
  font-size: var(--text-xs); font-weight: 500; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-muted); }
.filter-bar__foot { display: flex; align-items: center; gap: var(--space-3); flex-wrap: wrap; }
.filter-bar__count { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--text-muted);
  transition: opacity var(--dur-1) var(--ease-out); }
.filter-bar__clear { font-size: var(--text-xs); color: var(--text-link); text-decoration: underline; }
.filter-bar__clear[hidden] { display: none; }
@media (max-width: 639px) {
  .filter-bar { position: static; }
  .filter-bar fieldset { flex-wrap: nowrap; overflow-x: auto; scrollbar-width: none; padding-bottom: 2px; }
  .filter-bar fieldset::-webkit-scrollbar { display: none; }
}

/* ---- Publications: grids + expandable region ---- */
.pub-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-5); list-style: none; padding: 0; }
@media (max-width: 959px) { .pub-grid { grid-template-columns: 1fr; } }

.pubs-all { display: grid; grid-template-rows: 0fr; transition: grid-template-rows 0.6s var(--ease-in-out); }
.pubs-all > .pubs-all-inner { overflow: hidden; min-height: 0; }
.pubs-all.is-open { grid-template-rows: 1fr; }
.pubs-all-inner > * { padding-top: var(--space-6); }
html.no-js .pubs-all { grid-template-rows: 1fr; } /* content available without JS */

.pubs-expand { display: flex; justify-content: center; margin-top: var(--space-6); }
html.no-js .pubs-expand { display: none; }
.pubs-expand .icon { transition: transform var(--dur-2) var(--ease-out); }
.pubs-expand [aria-expanded="true"] .icon--chevron { transform: rotate(180deg); }

.filter-dip { transition: opacity 200ms var(--ease-out); }
.filter-dip.is-filtering { opacity: 0.4; }

/* ---- Talks list ---- */
.talk-list { list-style: none; padding: 0; }
.talk-row {
  display: grid; grid-template-columns: 200px 1fr; gap: var(--space-5);
  padding-block: var(--space-5); border-bottom: 1px solid var(--border-hairline);
  border-radius: var(--radius-btn);
  transition: background-color var(--dur-2) var(--ease-out);
}
@media (hover: hover) { .talk-row:hover { background: var(--bg-subtle); } }
.talk-row__thumb { width: 200px; aspect-ratio: 16 / 9; border-radius: var(--radius-btn);
  overflow: hidden; border: 1px solid var(--border-hairline); background: var(--surface-raised); }
.talk-row__thumb img { width: 100%; height: 100%; object-fit: cover; filter: var(--thumb-dim);
  transition: scale var(--dur-3) var(--ease-out), filter var(--dur-3) var(--ease-out); }
@media (hover: hover) { .talk-row:hover .talk-row__thumb img { scale: 1.04; filter: var(--thumb-dim-hover); } }
.talk-row__thumb--placeholder { display: grid; place-items: center; }
.talk-row__thumb--placeholder .icon { width: 32px; height: 32px; color: var(--text-muted); opacity: 0.35; }
.talk-row__body { display: grid; gap: 6px; align-content: start; }
.talk-row__title { font-size: var(--text-lg); font-weight: 600; color: var(--text-body); font-family: var(--font-body); line-height: 1.4; }
.talk-row__event { font-size: var(--text-sm); color: var(--text-muted); }
.talk-row__meta { display: flex; align-items: center; gap: var(--space-2); flex-wrap: wrap; }
.talk-row__meta .date { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--text-muted); }
.talk-row__actions { display: flex; gap: 4px; flex-wrap: wrap; }
.talk-row__actions .btn--ghost { font-size: var(--text-xs); height: 30px; padding-inline: 10px; gap: 6px; }
@media (max-width: 639px) {
  .talk-row { grid-template-columns: 144px 1fr; gap: var(--space-4); }
  .talk-row__thumb { width: 144px; }
}
@media (max-width: 479px) { .talk-row { grid-template-columns: 1fr; } .talk-row__thumb { width: 100%; } }

/* ---- Poster grid ---- */
.poster-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: var(--space-5); list-style: none; padding: 0; }
.poster-card { overflow: hidden; cursor: pointer; text-align: left; display: block; width: 100%; }
.poster-card__thumb { position: relative; aspect-ratio: 1 / 1.414; background: var(--surface-raised);
  border-bottom: 1px solid var(--border-hairline); overflow: hidden; }
.poster-card__thumb img { width: 100%; height: 100%; object-fit: cover; object-position: top; filter: var(--thumb-dim);
  transition: filter var(--dur-3) var(--ease-out); }
@media (hover: hover) { .poster-card:hover .poster-card__thumb img { filter: var(--thumb-dim-hover); } }
.poster-card__thumb .icon { position: absolute; inset: 0; margin: auto; width: 40px; height: 40px; color: var(--text-muted); opacity: 0.35; }
.poster-card__award { position: absolute; top: 8px; right: 8px; }
.poster-card__body { padding: var(--space-4); display: grid; gap: 4px; }
.poster-card__title { font-size: var(--text-sm); font-weight: 600; line-height: 1.4; color: var(--text-body);
  transition: color var(--dur-2) var(--ease-out); }
@media (hover: hover) { .poster-card:hover .poster-card__title { color: var(--text-heading); } }
.poster-card__event { font-size: var(--text-xs); color: var(--text-muted); }

/* ---- Dialog (poster lightbox) ---- */
.lightbox { border: 1px solid var(--border-strong); border-radius: 16px; padding: 0;
  background: var(--surface-card); color: var(--text-body);
  max-width: min(92vw, 900px); max-height: 92vh; overflow: hidden; }
.lightbox::backdrop { background: rgb(5 16 15 / 0.8); backdrop-filter: blur(4px); }
.lightbox[open] { animation: lightbox-in var(--dur-2) var(--ease-out); }
@keyframes lightbox-in { from { opacity: 0; transform: scale(0.96); } to { opacity: 1; transform: scale(1); } }
.lightbox__img { max-height: calc(92vh - 88px); width: auto; max-width: 100%; margin-inline: auto; object-fit: contain; }
.lightbox__bar { display: flex; align-items: center; gap: var(--space-3); padding: var(--space-3) var(--space-4);
  border-top: 1px solid var(--border-hairline); }
.lightbox__caption { font-size: var(--text-sm); color: var(--text-muted); margin-right: auto; }
.lightbox__close { margin-left: 4px; }

/* ---- CV: sidebar + timeline ---- */
.cv-layout { display: grid; grid-template-columns: 320px 1fr; gap: var(--space-7); align-items: start; }
.cv-sidebar { position: sticky; top: calc(var(--nav-height) + 32px); display: grid; gap: var(--space-5); }
.cv-sidebar .portrait { width: 132px; border-radius: 50%; border: 2px solid var(--border-strong); }
.cv-side-block h3 { font-size: var(--text-sm); text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--text-eyebrow); font-weight: 500; display: flex; align-items: center; gap: 8px; margin-bottom: var(--space-2); }
.cv-side-block h3 .icon { width: 16px; height: 16px; }
.cv-side-block ul { list-style: none; padding: 0; display: grid; gap: var(--space-1); font-size: var(--text-sm); color: var(--text-muted); }
.cv-side-block a { color: var(--text-muted); }
.cv-side-block a:hover { color: var(--text-link); }
.chip-cluster { display: flex; gap: 6px; flex-wrap: wrap; }

.lang-meter { display: flex; align-items: center; gap: 8px; }
.lang-meter .label { min-width: 9ch; }
.lang-meter .level { margin-left: auto; font-size: var(--text-xs); }
.lang-meter .dots { display: inline-flex; gap: 4px; }
.lang-meter .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--border-strong); }
.lang-meter .dot.on { background: var(--accent-primary); }

.cv-section { margin-bottom: var(--space-8); }
.cv-section > .section-head { margin-bottom: var(--space-5); }
.cv-section > .section-head .icon { font-size: var(--text-xl); }

.timeline { position: relative; list-style: none; padding: 0 0 0 28px; display: grid; gap: var(--space-6); }
.timeline::before { content: ""; position: absolute; left: 4px; top: 6px; bottom: 6px; width: 2px;
  background: var(--grad-rail); border-radius: 1px; }
.tl-entry { position: relative; }
.tl-entry::before { content: ""; position: absolute; left: -28px; top: 6px; width: 10px; height: 10px;
  border-radius: 50%; background: var(--bg-page); border: 2px solid var(--accent-primary);
  transition: transform var(--dur-2) var(--ease-out); }
html.js .tl-entry[data-reveal].is-in::before { animation: node-pop var(--dur-2) var(--ease-spring); }
@keyframes node-pop { 0% { transform: scale(1); } 50% { transform: scale(1.3); } 100% { transform: scale(1); } }
.tl-entry__head { display: flex; align-items: baseline; gap: var(--space-3); flex-wrap: wrap; }
.tl-entry__years { font-family: var(--font-mono); font-size: var(--text-sm); color: var(--text-muted); min-width: 88px; }
.tl-entry__org { font-weight: 600; color: var(--text-body); }
.tl-entry__role { font-size: var(--text-sm); color: var(--text-muted); }
.tl-entry__body { margin-top: var(--space-1); display: grid; gap: var(--space-2); }
.tl-entry__desc { font-size: var(--text-sm); color: var(--text-muted); max-width: 62ch; }
.tl-entry__chips { display: flex; gap: 6px; flex-wrap: wrap; }

@media (max-width: 959px) {
  .cv-layout { grid-template-columns: 1fr; }
  .cv-sidebar { position: static; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); align-items: start; }
}

/* ---- Thesis viewer ---- */
.thesis-meta { display: flex; gap: var(--space-2); flex-wrap: wrap; margin-block: var(--space-3); }
.thesis-abstract { border: 1px solid var(--border-hairline); border-radius: var(--radius-card);
  background: var(--surface-card); padding: var(--space-4) var(--space-5); max-width: 72ch; }
.thesis-abstract summary { cursor: pointer; font-family: var(--font-display); font-weight: 500;
  color: var(--text-heading); display: flex; align-items: center; gap: 8px; }
.thesis-abstract summary::-webkit-details-marker { display: none; }
.thesis-abstract summary .icon { transition: transform var(--dur-2) var(--ease-out); }
.thesis-abstract[open] summary .icon { transform: rotate(180deg); }
.thesis-abstract p { margin-top: var(--space-3); font-size: var(--text-sm); color: var(--text-muted); }

.viewer-toolbar { display: flex; align-items: center; gap: var(--space-2); flex-wrap: wrap; margin-block: var(--space-5) var(--space-4); }
.viewer-frame { position: relative; border: 1px solid var(--border-hairline); border-radius: var(--radius-card);
  overflow: hidden; background: var(--surface-card); }
.viewer-frame iframe { display: block; width: 100%; height: max(70vh, calc(100vh - 220px)); border: 0;
  opacity: 0; transition: opacity var(--dur-3) var(--ease-out); }
.viewer-frame iframe.is-ready { opacity: 1; }
.viewer-skeleton { position: absolute; inset: 0; display: grid; place-items: center;
  color: var(--text-muted); font-size: var(--text-sm); overflow: hidden; }
.viewer-skeleton::before { content: ""; position: absolute; inset: 0;
  background: linear-gradient(100deg, transparent 30%, rgb(255 255 255 / 0.04) 50%, transparent 70%);
  animation: shimmer 1.6s infinite; }
@keyframes shimmer { from { transform: translateX(-100%); } to { transform: translateX(100%); } }

/* Placeholder card for a missing / non-embeddable PDF */
.pdf-fallback { display: grid; grid-template-columns: 120px 1fr; gap: var(--space-5); padding: var(--space-5); align-items: center; }
.pdf-fallback__cover { aspect-ratio: 1 / 1.414; border-radius: var(--radius-btn); background: var(--surface-raised);
  border: 1px solid var(--border-hairline); display: grid; place-items: center; overflow: hidden; }
.pdf-fallback__cover img { width: 100%; height: 100%; object-fit: cover; filter: var(--thumb-dim); }
.pdf-fallback__cover .icon { width: 32px; height: 32px; color: var(--text-muted); opacity: 0.3; }
.pdf-fallback__body { display: grid; gap: var(--space-2); justify-items: start; }
.pdf-fallback__name { font-family: var(--font-mono); font-size: var(--text-sm); }
.pdf-fallback__size { font-size: var(--text-xs); color: var(--text-muted); }
@media (max-width: 479px) { .pdf-fallback { grid-template-columns: 1fr; } .pdf-fallback__cover { max-width: 140px; } }

/* ---- Live region toast (visually subtle, announced politely) ---- */
.status-live { position: fixed; bottom: 24px; left: 50%; translate: -50% 0; z-index: 120;
  background: var(--surface-raised); border: 1px solid var(--border-strong); color: var(--text-body);
  border-radius: var(--radius-pill); padding: 8px 18px; font-size: var(--text-sm);
  opacity: 0; pointer-events: none; transition: opacity var(--dur-2) var(--ease-out), translate var(--dur-2) var(--ease-out); }
.status-live.is-shown { opacity: 1; translate: -50% -6px; }