:root{
  --text:#111;
  --muted:#6b7280;
  --border:#e5e7eb;
  --accent-purple:#6F6AB1;
  --accent-green:#72BE8D;
  --bg:#fff;
}

*{ box-sizing:border-box }
html,body{ margin:0; padding:0 }
body{
  font-family: 'Epilogue', system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color:var(--text);
  background:var(--bg);
}

a{ color:inherit; }

/* Header + nav */
.site-header{ border-bottom:1px solid var(--border); background:#fff; position:sticky; top:0; z-index:50 }
.site-header__inner{ max-width:1120px; margin:0 auto; padding:14px 20px; display:flex; align-items:center; justify-content:space-between; gap:16px }
.brand{ display:flex; flex-direction:column; text-decoration:none; color:inherit }
.brand__title{ font-family:'Anton', sans-serif; font-size:28px; line-height:1; letter-spacing:.5px }
.brand__tag{ font-size:11px; letter-spacing:1px;margin-top: 10px; text-transform:uppercase; color:var(--muted) }

.mainnav{ display:flex; gap:18px; align-items:center; position:relative }
.mainnav__item{ position:relative }
.mainnav__link{ text-decoration:none; color:inherit; font-size:14px; text-transform:uppercase; letter-spacing:.8px }
.mainnav__item--has-sub:hover .mainnav__submenu{ opacity:1; pointer-events:auto; transform:translateY(0) }

.mainnav__submenu{
  position:absolute; top:100%; left:0; min-width:260px; padding:8px;
  border:1px solid var(--border); background:#fff; border-radius:10px;
  display:flex; flex-direction:column; gap:2px;
  opacity:0; pointer-events:none; transform:translateY(6px); transition:all .16s ease;
}
.mainnav__submenu-link{
  display:block; padding:10px 12px; border-radius:8px; color:inherit; text-decoration:none;
}
.mainnav__submenu-link:hover{ background:#f7f7fb }


/* Page wrapper */
.page{ max-width:1120px; margin:24px auto; padding:0 20px }

/* Filters */
.filters{ position:sticky; top:62px; z-index:40; background:#fff; border-bottom:1px solid var(--border); padding:10px 0; margin-bottom:18px }
.filters__row{ display:flex; flex-wrap:wrap; gap:10px; align-items:center; justify-content:space-between }
.search-row{ display:flex; gap:8px; align-items:center; flex:1 }
.input{ border:2px solid #111; padding:8px 10px; border-radius:0; min-width:260px }
.btn{ border:2px solid #111; background:#fff; padding:8px 10px; cursor:pointer; border-radius:0; }
.chips{ display:flex; flex-wrap:wrap; gap:8px; align-items:center }
.chip{ display:inline-block; border:2px solid #111; padding:2px 8px; font-size:12px; text-transform:uppercase; cursor:pointer }
.chip.active{ background:#111; color:#fff }
.muted{ color:var(--muted) ; font-size:13px }

/* Grid + cards */
.grid{ display:grid; gap:20px; grid-template-columns:repeat(auto-fill, minmax(280px, 1fr)) }
.card{ border:1px solid var(--border); border-radius:16px; overflow:hidden; background:#fff }
.imgbox{ position:relative; width:100%; padding-top:56.25%; background:#f6f7f9; display:block; }
.imgbox img{ position:absolute; inset:0; width:100%; height:100%; object-fit:cover; filter:grayscale(100%) }

/* Placeholder when no image is available */
.imgbox__placeholder{ position:absolute; inset:0; display:grid; place-items:center; background:repeating-linear-gradient(135deg,#fafafa,#fafafa 10px,#f0f0f3 10px,#f0f0f3 20px); color:#777; font-weight:700; letter-spacing:.04em; text-transform:uppercase }
.imgbox__placeholder-text{ background:rgba(255,255,255,.85); padding:.4rem .6rem; border:1px solid var(--border); border-radius:8px }

.card-body{ padding:16px }
.card-title{ margin:0; font-size:20px; font-weight:800; text-transform:uppercase; line-height:1.2 }
.card-title a{ color:inherit; text-decoration:none }
.card-title a:hover{ text-decoration:underline }
.card-meta{ color:var(--muted); font-size:13px; margin-top:6px }
.card-abstract{ color:#333; margin-top:12px }

/* Links row (PDF/DOI/Publisher) */
.row-split{ margin-top:12px; display:flex; justify-content:space-between; align-items:center }
.links{ display:flex; gap:12px; align-items:center }

/* Make PDF / DOI bold and apply hover color */
.link-sm{
  font-size:13px;
  text-decoration:underline;
  cursor:pointer;
  font-weight:700;
}
.links a.link-sm:hover{
  color:#f15a29;
  text-decoration:none;
}

/* Detail */
.detail{ max-width:920px; margin:0 auto }
.detail-title{ font-family:'Anton',sans-serif; font-size:32px; text-transform:uppercase; margin:0 0 8px }
.detail-sub{ color:var(--muted); margin-top:6px }
.detail-abstract{ margin-top:12px }

/* Static pages */
.prose{ max-width:820px; margin:0 auto; line-height:1.6 }
.prose h2{ font-family:'Anton'; margin:0 0 6px }
.prose p{ margin:0 0 12px }

/* Video embed */
.section-title{ margin:16px 0 8px; font-weight:800; text-transform:uppercase; font-size:14px; letter-spacing:.6px }
.video-select{ margin-bottom:10px }
.video-embed{ width:100%; }
.video-embed__box{
  position:relative;
  width:100%;
  padding-top:56.25%; /* 16:9 */
  background:#000;
  border-radius:12px;
  overflow:hidden;
  border:1px solid var(--border);
}
.video-embed__box iframe{
  position:absolute; inset:0; width:100%; height:100%; border:0;
}

/* YouTube thumbnail fallback (click-to-play) */
.yt-thumb {
  position: relative;
  width: 100%;
  padding-top: 56.25%;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: #000;
  cursor: pointer;
}
.yt-thumb img {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
  filter: brightness(0.86);
}
.yt-thumb .yt-play {
  position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
  width: 72px; height: 72px; border-radius: 999px; background: rgba(255,255,255,.92);
  display: grid; place-items: center; box-shadow: 0 8px 24px rgba(0,0,0,.25);
}
.yt-thumb .yt-play:before {
  content: ""; display: block; border-style: solid;
  border-width: 12px 0 12px 20px; border-color: transparent transparent transparent #000;
  margin-left: 6px;
}

/* Footer */
.site-footer{ border-top:1px solid var(--border); margin-top:40px }
.site-footer__inner{ max-width:1120px; margin:0 auto; padding:14px 20px; display:flex; align-items:center; justify-content:space-between }

/* Responsive */
@media (max-width:900px){
  .hero__title{ font-size:22px }
}



.brand__surname{
  color: #F15A29;
}