:root{
  --max: 850px;
  --pad: 20px;
  --bg: #f7f7f7;
  --text: #222;
  --muted: #555;
  --border: #ddd;
  --panel: #fff;
  --overlay: rgba(0,0,0,.45);
  --title-track: 6px;
  --tile-gap: 20px;
}

*{
  box-sizing: border-box;
}

body{
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: var(--bg);
  color: var(--text);
}

main{
  max-width: var(--max);
  margin: 0 auto;
  padding: var(--pad);
  text-align: center;
}

/* top site name */
.site-title{
  letter-spacing: var(--title-track);
  font-weight: 700;
  margin: 0 0 25px 0;
  font-size: 22px;
  text-align: center;
}

/* intro text */
.intro{
  max-width: 700px;
  margin: 0 auto 30px auto;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.6;
  text-align: left;
}

/* breadcrumbs */
.breadcrumbs{
  background: #efefef;
  border: 1px solid var(--border);
  padding: 8px 12px;
  font-size: 14px;
  margin: 0 0 20px 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  text-align: left;
}

.breadcrumbs a{
  color: var(--text);
  text-decoration: none;
}

.breadcrumbs a:hover{
  text-decoration: underline;
}

.sep{
  color: #888;
}

.current{
  color: var(--muted);
  font-weight: 700;
}

/* 2 x 2 hub grid */
.grid{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--tile-gap);
  margin-bottom: 40px;
}

.tile{
  position: relative;
  overflow: hidden;
  display: block;
  border: 1px solid var(--border);
  background: var(--panel);
  text-decoration: none;
}

.tile,
.tile:link,
.tile:visited{
  color: #fff;
}

.tile img{
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.3s ease;
}

.tile:hover img{
  transform: scale(1.05);
}

.overlay{
  position: absolute;
  inset: 0;
  background: var(--overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
  color: #fff;
  font-size: 24px;
  letter-spacing: 3px;
  font-weight: 700;
  text-align: center;
  padding: 0 10px;
  text-shadow: 0 2px 6px rgba(0,0,0,.7);
}

.tile:hover .overlay{
  opacity: 1;
}

/* 3-choice strip layout */
.strip-list{
  display: grid;
  gap: 20px;
  margin-bottom: 40px;
}

.strip{
  position: relative;
  overflow: hidden;
  display: block;
  border: 1px solid var(--border);
  background: var(--panel);
  text-decoration: none;
}

.strip,
.strip:link,
.strip:visited{
  color: #fff;
}

.strip img{
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.3s ease;
}

.strip:hover img{
  transform: scale(1.03);
}

.strip .overlay{
  opacity: 1;
}

/* footer */
.site-footer{
  margin-top: 40px;
  text-align: center;
}

.site-footer img{
  width: 80px;
  height: auto;
  margin-bottom: 10px;
}

.page-title{
  margin: 0 0 20px 0;
  letter-spacing: 3px;
  font-size: 22px;
  font-weight: 700;
  text-align: center;
}

.footer-text{
  letter-spacing: 4px;
  font-weight: 700;
  font-size: 14px;
  text-align: center;
}

/* mobile */
@media (max-width: 768px){
  .grid{
    grid-template-columns: 1fr;
  }
}

.quickjump{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin:10px 0 22px;
}

.q-link,
.q-link:link,
.q-link:visited{
  background:#fff;
  border:1px solid var(--border);
  padding:8px 12px;
  border-radius:8px;
  color:var(--text);
  font-size:13px;
  text-decoration:none;
}

.q-link:hover{
  text-decoration:underline;
}

.q-disabled{
  background:#fff;
  border:1px solid var(--border);
  padding:8px 12px;
  border-radius:8px;
  color:#777;
  font-size:13px;
}

.gallery{
  display:grid;
  grid-template-columns:repeat(2, 1fr);
  gap:30px;
  margin-top:25px;
  margin-bottom:40px;
}

.photo-item{
  margin:0;
}

.photo-item img{
  width:100%;
  display:block;
  border:1px solid var(--border);
  background:#fff;
  cursor:pointer;
}

.caption{
  margin-top:10px;
  font-size:14px;
  color:var(--muted);
  text-align:left;
  line-height:1.5;
}

.lightbox{
  position:fixed;
  inset:0;
  background:rgba(0,0,0,0.85);
  display:none;
  align-items:center;
  justify-content:center;
  z-index:9999;
  padding:20px;
}

.lightbox.open{
  display:flex;
}

.lightbox img{
  max-width:95vw;
  max-height:85vh;
  border:1px solid rgba(255,255,255,0.25);
  background:#000;
}

.lb-close{
  position:absolute;
  top:14px;
  right:18px;
  font-size:28px;
  color:#fff;
  cursor:pointer;
  user-select:none;
}

.lb-btn{
  position:absolute;
  top:50%;
  transform:translateY(-50%);
  font-size:36px;
  color:#fff;
  cursor:pointer;
  user-select:none;
  padding:10px 14px;
  border-radius:10px;
  background:rgba(0,0,0,0.25);
}

.lb-prev{
  left:14px;
}

.lb-next{
  right:14px;
}

.lb-title{
  position:absolute;
  bottom:14px;
  left:14px;
  right:14px;
  color:#fff;
  font-size:14px;
  text-align:center;
  opacity:0.9;
  line-height:1.4;
}

@media (max-width:768px){
  .gallery{
    grid-template-columns:1fr;
  }
}