:root{
  --bg: #ffffff;
}

*{ box-sizing: border-box; }

html, body{
  margin: 0;
  padding: 0;
  width: 100%;
  min-height: 100%;
  background: var(--bg);
}

/* ---------- column ---------- */

.col{
  max-width: 760px;
  width: 100%;
  margin: 0 auto;
  padding: 60px 24px 100px;
}

.page-title{
  position: fixed;
  top: 20px;
  left: 24px;
  z-index: 50;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 14px;
  font-weight: 400;
  color: #000;
}

/* ---------- feed ---------- */

.feed{
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.feed img{
  display: block;
  width: 100%;
  max-width: 920px;
  height: auto;
  cursor: pointer;
  transition: transform 0.3s cubic-bezier(.2,.8,.2,1);
}

.feed img:hover{
  transform: translateY(-3px);
}

/* ---------- book cta ---------- */

.book-cta{
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 60;
  height: 80px;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 8px 22px 8px 8px;
  background: #fff;
  border: 1px solid #e6e6e6;
  border-radius: 8px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
  text-decoration: none;
  cursor: pointer;
  transition: box-shadow 0.2s ease;
}

.book-cta:hover{
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
}

.book-cta img{
  height: 100%;
  width: auto;
  display: block;
  border-radius: 3px;
}

.book-cta-text{
  display: inline-block;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 14px;
  font-weight: 400;
  line-height: 1.4;
  color: #000;
  white-space: nowrap;
  transform: translateY(-2px);
}

.book-cta-arrow{
  display: inline-block;
  vertical-align: middle;
  margin-left: 3px;
  margin-top: -2px;
  color: #000;
}

/* ---------- lightbox ---------- */

.lightbox{
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(20, 17, 13, 0.86);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  padding: 48px;
  cursor: zoom-out;
}

.lightbox.open{
  opacity: 1;
  pointer-events: auto;
}

.lightbox-close{
  position: fixed;
  top: 24px;
  right: 24px;
  z-index: 101;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: #fff;
  cursor: pointer;
  opacity: 0.85;
  transition: opacity 0.2s ease;
}

.lightbox-close:hover{
  opacity: 1;
}

.lightbox-content{
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 1100px;
  max-height: 100%;
  transform: scale(0.96);
  transition: transform 0.3s cubic-bezier(.2,.8,.2,1);
}

.lightbox.open .lightbox-content{
  transform: scale(1);
}

.lightbox-img-wrap{
  max-width: 100%;
  overflow: hidden;
  line-height: 0;
}

.lightbox-img-wrap img{
  display: block;
  max-width: 100%;
  max-height: calc(100vh - 140px);
  width: auto;
  height: auto;
  object-fit: contain;
}

.lightbox-caption{
  flex: 0 0 auto;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 14px;
  font-weight: 400;
  color: #fff;
  cursor: default;
  text-align: left;
}

@media (max-width: 560px){
  .col{
    padding: calc(20px + 18px + 16px) 20px 80px;
  }
  .feed{
    gap: 28px;
  }
}