/* ==========================================================================
   PropGesture project page - page-specific styles.
   Bulma provides the base reset/typography; everything below is ours.
   ========================================================================== */

:root {
  --pg-fg: #1c1f24;
  --pg-fg-soft: #4a5058;
  --pg-fg-faint: #767d87;
  --pg-bg: #ffffff;
  --pg-bg-alt: #f6f7f9;
  --pg-line: #e3e6ea;
  --pg-accent: #2b5fd9;
  --pg-accent-soft: #eaf0fd;
  --pg-radius: 10px;
  --pg-maxw: 1200px;
}

html { scroll-behavior: smooth; }

body {
  font-family: "Noto Sans", "Google Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--pg-fg);
  background: var(--pg-bg);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--pg-accent); }
a:hover { color: #1b47ab; }

/* --------------------------------------------------------------- hero ---- */
.pg-hero { padding: 3.5rem 1.5rem 1.5rem; }
/* Sits between the title (2.75rem) and the author list (1.35rem). */
.pg-venue {
  font-size: 1.65rem; font-weight: 600; letter-spacing: 0.01em;
  color: var(--pg-accent); margin-bottom: 1rem;
}
/* Two classes, so this beats Bulma's own `.title.is-2 { font-size: 2.5rem }`.
   The clamp keeps 2.75rem on desktop and scales down rather than overflowing
   on narrow screens. */
.title.pg-title {
  font-family: "Google Sans", "Noto Sans", sans-serif;
  font-size: clamp(2rem, 4.6vw, 2.75rem);
  font-weight: 700; letter-spacing: -0.02em; line-height: 1.2;
  color: var(--pg-fg); margin-bottom: 1rem !important;
}
.pg-authors {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 0.25rem 1.25rem;
  font-size: 1.35rem; margin-bottom: 0.6rem;
}
.pg-author { color: var(--pg-fg); }
.pg-author sup { color: var(--pg-fg-faint); font-size: 0.7em; }
.pg-affil {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 0.15rem 1.25rem;
  color: var(--pg-fg-soft); font-size: 1.35rem;
}
.pg-affil sup { font-size: 0.7em; }
.pg-equal { margin-top: 0.35rem; font-size: 1rem; color: var(--pg-fg-faint); }

.pg-buttons { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.6rem; margin-top: 1.75rem; }
.pg-btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.55rem 1.15rem; border-radius: 999px;
  background: var(--pg-fg); color: #fff; font-size: 0.92rem; font-weight: 500;
  transition: transform 0.15s ease, background 0.15s ease;
}
.pg-btn:hover { background: #000; color: #fff; transform: translateY(-1px); }
.pg-btn .pg-icon { font-size: 0.95em; }
.pg-btn.is-disabled {
  background: var(--pg-bg-alt); color: var(--pg-fg-faint);
  border: 1px solid var(--pg-line); cursor: default;
}
.pg-btn.is-disabled:hover { transform: none; background: var(--pg-bg-alt); color: var(--pg-fg-faint); }
.pg-btn em { font-style: normal; opacity: 0.75; font-size: 0.85em; }

/* --------------------------------------------------------------- icons ---- */
.pg-icon { width: 1.05em; height: 1.05em; flex: none; display: inline-block; vertical-align: -0.15em; }
.pg-icon-lg { width: 2.4rem; height: 2.4rem; margin-bottom: 0.25rem; }
.pg-sound .pg-icon { width: 15px; height: 15px; }
.pg-carousel-nav .pg-icon { width: 17px; height: 17px; }

/* ----------------------------------------------------------- sections ---- */
.pg-section { padding: 3.25rem 1.5rem; }
.pg-section.pg-alt { background: var(--pg-bg-alt); border-block: 1px solid var(--pg-line); }
.pg-teaser-section { padding-top: 0.5rem; padding-bottom: 1.5rem; }
.pg-statement-section { padding-top: 1rem; padding-bottom: 2.5rem; }

.pg-h2 {
  font-family: "Google Sans", "Noto Sans", sans-serif;
  font-size: 1.75rem; font-weight: 700; letter-spacing: -0.015em;
  text-align: center; margin-bottom: 1.75rem;
}
.pg-h3 {
  font-family: "Google Sans", "Noto Sans", sans-serif;
  font-size: 1.2rem; font-weight: 600; margin-bottom: 0.5rem; letter-spacing: -0.01em;
}
.pg-prose { color: var(--pg-fg-soft); line-height: 1.75; font-size: 1.0rem; }
/* Flush both margins across body copy. Auto-hyphenation is off so no hyphens
   are introduced mid-word at line breaks. */
.pg-prose, .pg-group-desc, .pg-caption {
  text-align: justify; hyphens: manual; -webkit-hyphens: manual;
}
.pg-prose p + p { margin-top: 0.9rem; }
.pg-prose strong { color: var(--pg-fg); }
.pg-intro { margin: 0 auto 1.75rem; }
.pg-statement {
  font-size: 1.22rem; line-height: 1.65; text-align: center;
  color: var(--pg-fg-soft); max-width: 780px; margin: 0 auto;
}
.pg-statement strong { color: var(--pg-fg); }

.pg-hint {
  display: inline-flex; align-items: center; gap: 0.4rem; justify-content: center;
  margin-top: 1rem !important; font-size: 0.85rem; color: var(--pg-fg-faint);
}

/* ------------------------------------------------------ figures/images ---- */
/* Square corners: the figure's corner labels get clipped by a radius. */
.pg-teaser { display: block; width: 100%; height: auto; }
.pg-figure { margin: 0 0 1.5rem; }
.pg-figure-img {
  display: block; width: 100%; height: auto;
  border: 1px solid var(--pg-line); border-radius: var(--pg-radius); background: #fff;
}
.pg-caption {
  margin-top: 0.75rem; font-size: 0.88rem; line-height: 1.6;
  color: var(--pg-fg-faint);
}
.pg-caption strong { color: var(--pg-fg-soft); }

/* -------------------------------------------------------------- video ---- */
.pg-video-placeholder {
  aspect-ratio: 16 / 9; width: 100%;
  display: flex; align-items: center; justify-content: center; text-align: center;
  border: 1px dashed var(--pg-line); border-radius: var(--pg-radius);
  background: var(--pg-bg-alt); color: var(--pg-fg-faint);
}
.pg-placeholder-title { font-weight: 600; color: var(--pg-fg-soft); margin-top: 0.5rem; }
.pg-placeholder-sub { font-size: 0.88rem; }
.pg-video-embed { position: relative; width: 100%; aspect-ratio: 16 / 9; border-radius: var(--pg-radius); overflow: hidden; }
.pg-video-embed iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }

/* ------------------------------------------------------- video panels ---- */
.pg-panel {
  position: relative; border-radius: var(--pg-radius); overflow: hidden;
  background: #eceef1; border: 1px solid var(--pg-line);
}
.pg-panel video {
  display: block; width: 100%; height: auto; aspect-ratio: 1 / 1;
  object-fit: contain; background: #eceef1;
}
.pg-panel-label {
  position: absolute; top: 0.6rem; right: 0.6rem; z-index: 2;
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.22rem 0.6rem; border-radius: 6px;
  background: rgba(20, 22, 26, 0.72); color: #fff;
  font-size: 0.78rem; font-weight: 600; letter-spacing: 0.01em;
  backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px);
}
.pg-panel-label.is-ours { background: var(--pg-accent); }
.pg-sound {
  position: absolute; bottom: 0.6rem; right: 0.6rem; z-index: 2;
  width: 32px; height: 32px; display: grid; place-items: center;
  border: 0; border-radius: 50%; cursor: pointer;
  background: rgba(20, 22, 26, 0.6); color: #fff; font-size: 0.8rem;
  opacity: 0; transition: opacity 0.15s ease, background 0.15s ease;
}
.pg-panel:hover .pg-sound, .pg-sound.is-on, .pg-sound:focus-visible { opacity: 1; }
.pg-sound:hover { background: rgba(20, 22, 26, 0.85); }
.pg-sound.is-on { background: var(--pg-accent); }

/* --------------------------------------------------------------- grid ---- */
.pg-grid { display: grid; gap: 0.9rem; }
.pg-grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.pg-grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (max-width: 900px) { .pg-grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 600px) { .pg-grid-3, .pg-grid-2 { grid-template-columns: 1fr; } }

/* ------------------------------------------------------------ actions ---- */
/* Sits just below the clips it replays. */
.pg-actions { display: flex; justify-content: flex-start; margin: 0.6rem 0 0; }
.pg-refresh {
  display: grid; place-items: center;
  width: 30px; height: 30px; padding: 0; border-radius: 50%; cursor: pointer;
  font: inherit; color: var(--pg-fg-soft); background: transparent;
  border: 1px solid var(--pg-line); transition: all 0.15s ease;
}
.pg-refresh:hover { color: var(--pg-fg); border-color: var(--pg-fg-faint); }
.pg-refresh:active .pg-icon { transform: rotate(-180deg); }
.pg-refresh .pg-icon { width: 13px; height: 13px; transition: transform 0.3s ease; }
.pg-alt .pg-refresh { background: #fff; }

/* -------------------------------------------------------------- chips ---- */
.pg-chips { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.4rem; margin-bottom: 1.1rem; }
.pg-chip {
  padding: 0.4rem 0.95rem; border-radius: 999px; cursor: pointer;
  font: inherit; font-size: 0.86rem; font-weight: 500;
  color: var(--pg-fg-soft); background: transparent;
  border: 1px solid var(--pg-line); transition: all 0.15s ease;
}
.pg-chip:hover { border-color: var(--pg-fg-faint); color: var(--pg-fg); }
.pg-chip.is-active {
  background: var(--pg-fg); border-color: var(--pg-fg); color: #fff;
}
.pg-alt .pg-chip { background: #fff; }
.pg-alt .pg-chip.is-active { background: var(--pg-fg); }

/* ----------------------------------------------------------- carousel ---- */
.pg-group { margin-bottom: 2.75rem; }
.pg-group:last-child { margin-bottom: 0; }
.pg-group-desc {
  color: var(--pg-fg-soft); font-size: 0.95rem; line-height: 1.7;
  margin-bottom: 1.1rem;
}
.pg-carousel { position: relative; }
.pg-carousel-viewport { overflow: hidden; border-radius: var(--pg-radius); }
.pg-carousel-track { display: flex; transition: transform 0.4s cubic-bezier(0.22, 0.61, 0.36, 1); }
.pg-slide {
  flex: 0 0 100%; min-width: 100%;
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.9rem;
}
/* An odd trailing slide holds a single panel - keep it column-width, centred. */
.pg-slide-single {
  grid-template-columns: minmax(0, calc(50% - 0.45rem));
  justify-content: center;
}
@media (max-width: 700px) { .pg-slide { grid-template-columns: 1fr; } }

.pg-carousel-nav {
  position: absolute; top: 50%; transform: translateY(-50%); z-index: 3;
  width: 40px; height: 40px; display: grid; place-items: center;
  border: 1px solid var(--pg-line); border-radius: 50%; cursor: pointer;
  background: rgba(255, 255, 255, 0.94); color: var(--pg-fg);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.12);
  transition: background 0.15s ease, opacity 0.15s ease;
}
.pg-carousel-nav:hover { background: #fff; }
.pg-carousel-nav[disabled] { opacity: 0.35; cursor: default; }
.pg-carousel-prev { left: -18px; }
.pg-carousel-next { right: -18px; }
@media (max-width: 1280px) {
  .pg-carousel-prev { left: 8px; }
  .pg-carousel-next { right: 8px; }
}
.pg-dots { display: flex; justify-content: center; gap: 0.45rem; margin-top: 0.9rem; }
.pg-dot {
  width: 8px; height: 8px; padding: 0; border: 0; border-radius: 50%;
  background: #c8ccd2; cursor: pointer; transition: all 0.15s ease;
}
.pg-dot:hover { background: var(--pg-fg-faint); }
.pg-dot.is-active { background: var(--pg-fg); transform: scale(1.25); }

/* -------------------------------------------------------------- table ---- */
/* ------------------------------------------------------------- bibtex ---- */
.pg-bibtex {
  background: var(--pg-bg-alt); border: 1px solid var(--pg-line);
  border-radius: var(--pg-radius); padding: 1.15rem 1.35rem;
  font-size: 0.85rem; line-height: 1.6; overflow-x: auto; color: var(--pg-fg-soft);
}
.pg-bibtex code { background: none; color: inherit; padding: 0; font-size: inherit; }

/* ------------------------------------------------------------- footer ---- */
.pg-footer {
  padding: 2.5rem 1.5rem; border-top: 1px solid var(--pg-line);
  font-size: 0.85rem; line-height: 1.7; color: var(--pg-fg-faint);
}
.pg-footer p + p { margin-top: 0.6rem; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .pg-carousel-track { transition: none; }
}