/* Simple Baby Shower Gallery (Pastel Blue theme) */

:root{
  --bg1: #f4fbff;
  --bg2: #dff1ff;
  --ink: #17324a;
  --blue: #9fcdf5;
  --blue-2: #cfe8ff;
  --shadow: rgba(0, 35, 70, 0.16);
}

*{ box-sizing: border-box; }
html, body { height: 100%; }

body{
  margin: 0;
  font-family: "Nunito", system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(900px 600px at 15% 10%, rgba(159,205,245,0.35), transparent 55%),
    radial-gradient(900px 600px at 85% 15%, rgba(207,232,255,0.55), transparent 55%),
    linear-gradient(180deg, var(--bg1), var(--bg2));
  overflow-x: hidden;
}

.no-scroll{ overflow: hidden; }

/* Header */
.topbar{
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  background: rgba(255,255,255,0.72);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(159,205,245,0.35);
}

.brand{
  display: flex;
  gap: 12px;
  align-items: center;
}

.dot{
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: linear-gradient(180deg, rgba(207,232,255,0.95), rgba(159,205,245,0.95));
  box-shadow: 0 10px 18px rgba(0,35,70,0.10);
  border: 1px solid rgba(159,205,245,0.75);
}

.titles .small{
  font-size: 12px;
  font-weight: 900;
  color: rgba(23, 50, 74, 0.70);
  letter-spacing: .02em;
}

.titles .big{
  font-family: "DM Serif Display", serif;
  font-size: 20px;
  line-height: 1;
}

.nav{
  display: flex;
  gap: 10px;
  align-items: center;
}

.navlink{
  text-decoration: none;
  font-weight: 900;
  color: rgba(23, 50, 74, 0.80);
  padding: 10px 12px;
  border-radius: 999px;
  border: 1px solid rgba(159,205,245,0.40);
  background: rgba(255,255,255,0.55);
}

.navlink.active{
  background: linear-gradient(180deg, rgba(207,232,255,0.95), rgba(159,205,245,0.85));
  border-color: rgba(159,205,245,0.75);
}

/* Layout */
.wrap{
  max-width: 1200px;
  margin: 0 auto;
  padding: 18px 16px 34px;
}

/* Grid: 4 columns on desktop, 3 on medium, 2 on small, 1 on very small */
.grid{
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

@media (max-width: 1100px){
  .grid{ grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 760px){
  .grid{ grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 420px){
  .grid{ grid-template-columns: 1fr; }
}

/* Tiles */
.tile{
  border: 0;
  padding: 0;
  background: rgba(255,255,255,0.70);
  border-radius: 22px;
  overflow: hidden;
  box-shadow: 0 18px 30px var(--shadow);
  cursor: pointer;
  transition: transform .18s ease, box-shadow .18s ease;
}

.tile:hover{
  transform: translateY(-2px);
  box-shadow: 0 22px 38px rgba(0,35,70,0.18);
}

.tile:active{
  transform: translateY(0px);
}

.tile:focus-visible{
  outline: none;
  box-shadow: 0 0 0 4px rgba(159,205,245,0.55), 0 18px 30px rgba(0,35,70,0.16);
}

.tile img{
  width: 100%;
  height: 260px;
  object-fit: cover;
  display: block;
}

@media (max-width: 760px){
  .tile img{ height: 220px; }
}

/* Lightbox */
.lightbox{
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(14, 28, 40, 0.58);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity .25s ease, visibility .25s ease;
  z-index: 30;
  padding: 16px;
}

.lightbox.show{
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.lightbox img{
  max-width: min(980px, 96vw);
  max-height: 84vh;
  border-radius: 20px;
  box-shadow: 0 30px 70px rgba(0,0,0,0.35);
}

.lb-close{
  position: fixed;
  top: 14px;
  right: 14px;
  width: 44px;
  height: 44px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.35);
  background: rgba(255,255,255,0.18);
  color: white;
  font-size: 28px;
  cursor: pointer;
}