/* Home filter – future-proof, Chirpy-safe */

#home-filter{
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;      /* spacing between buttons */
  margin-bottom: 1rem;
}


/* Design tokens */
:root {
  --hf-bg: rgba(0, 0, 0, 0.03);
  --hf-bg-hover: rgba(0, 0, 0, 0.06);
  --hf-border: rgba(0, 0, 0, 0.10);
  --hf-border-hover: rgba(0, 0, 0, 0.18);
  --hf-text: var(--text-color);
  --hf-active-bg: rgba(0, 0, 0, 0.07);
  --hf-active-border: rgba(0, 0, 0, 0.30);
}

/* Dark mode support */
html[data-mode="dark"], body[data-mode="dark"], [data-theme="dark"] {
  --hf-bg: rgba(255, 255, 255, 0.04);
  --hf-bg-hover: rgba(255, 255, 255, 0.08);
  --hf-border: rgba(255, 255, 255, 0.14);
  --hf-border-hover: rgba(255, 255, 255, 0.25);
  --hf-active-bg: rgba(255, 255, 255, 0.10);
  --hf-active-border: rgba(255, 255, 255, 0.35);
}

#home-filter .btn {
  border-radius: 999px;
  padding: .35rem .75rem;
  font-weight: 600;
  letter-spacing: .2px;

  background: var(--hf-bg);
  border: 1px solid var(--hf-border);
  color: var(--hf-text);

  transition: transform .12s ease,
              background .12s ease,
              border-color .12s ease;
}

#home-filter .btn:hover {
  transform: translateY(-1px);
  background: var(--hf-bg-hover);
  border-color: var(--hf-border-hover);
}

#home-filter .btn.active {
  background: var(--hf-active-bg);
  border-color: var(--hf-active-border);
}

/* Accessibility */
#home-filter .btn:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 2px;
}



/* === Project Links (Repo / Demo / PDF / Paper) === */

.project-links{
  margin: 1.25rem 0 .5rem;
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  justify-content: center;
}

.project-link{
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  padding: .48rem 1rem;

  font-size: .9rem;
  font-weight: 600;
  text-decoration: none;

  border-radius: 999px;
  color: var(--text-color);

  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.14);
  backdrop-filter: blur(6px);

  transition: transform .15s ease,
              background .15s ease,
              border-color .15s ease,
              box-shadow .15s ease;
}

.project-link:hover{
  transform: translateY(-1px);
  background: rgba(255,255,255,.08);
  border-color: rgba(255,255,255,.25);
  box-shadow: 0 10px 24px rgba(0,0,0,.25);
}

.project-link:focus-visible{
  outline: 2px solid var(--bs-primary);
  outline-offset: 2px;
}

.project-link i{
  font-size: 1rem;
}

/* Links button bar (keep Chirpy/Bootstrap button style, fix spacing reliably) */
.post-repo-link{
  margin: .15rem 0 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
}

.post-repo-link .btn{
  margin: 0 .2rem .12rem 0;   /* right + bottom (very small) */
  padding: .2rem .55rem;      /* optional: tighter button */
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  gap: .3rem;
}

.post-repo-link .btn:hover{
  transform: translateY(-1px);
}



.post-repo-link .btn{
  margin: 0.5rem .6rem 0rem 0;
}