:root{
  --petrol-0:#031a1d;
  --petrol-1:#06262a;
  --petrol-2:#0a3438;
  --card: rgba(255,255,255,.06);
  --card2: rgba(255,255,255,.085);
  --border: rgba(255,255,255,.12);
  --text: #e9fbfb;
  --muted:#b9dede;
  --radius: 18px;
  --shadow: 0 18px 45px rgba(0,0,0,.35);
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Inter, sans-serif;
  color: var(--text);
  background:
    radial-gradient(1000px 600px at 15% 0%, rgba(0, 255, 214, .10), transparent 60%),
    radial-gradient(900px 600px at 90% 10%, rgba(0, 187, 255, .10), transparent 55%),
    linear-gradient(180deg, var(--petrol-0), var(--petrol-1) 40%, var(--petrol-2));
}

header{
  padding: 56px 16px 14px;
  text-align:center;
}
h1{
  margin:0;
  font-size: clamp(2.4rem, 5.5vw, 4.1rem);
  letter-spacing:.02em;
  text-shadow: 0 12px 40px rgba(0,0,0,.35);
}
.subtitle{
  margin: 10px auto 0;
  max-width: 760px;
  color: var(--muted);
  line-height: 1.4;
}

.container{
  max-width: 1150px;
  margin:0 auto;
  padding: 16px;
}

.panel{
  background: linear-gradient(180deg, var(--card2), var(--card));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(8px);
  margin-bottom: 16px;
}

.row{display:grid; gap:12px;}
@media (min-width: 900px){
  .row{grid-template-columns: 1.1fr 2fr auto; align-items:start;}
}

input, textarea, button{font:inherit}
input[type="file"]{
  width:100%;
  padding: 10px;
  border: 1px dashed rgba(255,255,255,.22);
  border-radius: 14px;
  background: rgba(0,0,0,.15);
  color: var(--text);
}

button{
  padding: 12px 16px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,.18);
  background: rgba(0,0,0,.18);
  color: var(--text);
  cursor:pointer;
  transition: transform .08s ease, background .18s ease, border-color .18s ease;
}
button:hover{ background: rgba(0,0,0,.26); border-color: rgba(255,255,255,.28); }
button:active{ transform: translateY(1px); }
button.primary{
  background: linear-gradient(180deg, rgba(0,255,214,.25), rgba(0,0,0,.20));
  border-color: rgba(0,255,214,.35);
}
small{ color: rgba(233,251,251,.72); }

.grid{
  display:grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
  padding-bottom: 56px;
}

.card{
  border-radius: var(--radius);
  overflow:hidden;
  background: linear-gradient(180deg, rgba(255,255,255,.09), rgba(255,255,255,.05));
  border: 1px solid rgba(255,255,255,.12);
  box-shadow: 0 16px 40px rgba(0,0,0,.22);
  transition: transform .12s ease, border-color .18s ease;
}
.card:hover{
  transform: translateY(-2px);
  border-color: rgba(0,255,214,.25);
}

.thumb{
  width:100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  display:block;
  filter: saturate(1.05) contrast(1.02);
}

.body{
  padding: 12px 12px 14px;
  display:grid;
  gap: 8px;
}
.caption{ line-height:1.35; }
.meta{ color: rgba(233,251,251,.70); font-size: .9rem; }

.actions{
  display:flex;
  gap:10px;
  justify-content: space-between;
  align-items:center;
}
.danger{
  background: rgba(255, 90, 90, .12);
  border-color: rgba(255, 90, 90, .22);
}
.danger:hover{ background: rgba(255, 90, 90, .18); }

.img-btn{
  padding:0;
  border:none;
  background: transparent;
  cursor: zoom-in;
  display:block;
  width:100%;
}

/* Admin caption list */
.caption-list{
  display:grid;
  gap:10px;
  padding: 10px;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 14px;
  background: rgba(0,0,0,.12);
  max-height: 320px;
  overflow:auto;
}
.caption-row{
  display:grid;
  gap:8px;
  padding: 10px;
  border-radius: 14px;
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.08);
}
.caption-file{
  font-size: .92rem;
  color: rgba(233,251,251,.78);
}
.caption-input{
  width:100%;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,.14);
  background: rgba(0,0,0,.16);
  color: var(--text);
}

/* Lightbox */
.lightbox{
  position: fixed;
  inset: 0;
  display:none;
  z-index: 9999;
}
.lightbox.open{ display:block; }
.lb-backdrop{
  position:absolute; inset:0;
  background: rgba(0,0,0,.72);
  backdrop-filter: blur(6px);
}
.lb-content{
  position:absolute;
  left:50%; top:50%;
  transform: translate(-50%, -50%);
  width: min(1080px, calc(100% - 32px));
  max-height: calc(100% - 64px);
  display:grid;
  gap: 12px;
  z-index:2;
}
#lbImg{
  width:100%;
  max-height: calc(100vh - 190px);
  object-fit: contain;
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,.16);
  background: rgba(0,0,0,.25);
  box-shadow: 0 22px 70px rgba(0,0,0,.45);
}
.lb-meta{
  display:flex;
  justify-content: space-between;
  gap: 12px;
  color: rgba(233,251,251,.86);
}
.lb-caption{
  font-size: 1.05rem;
  line-height:1.35;
}
.lb-date{
  opacity:.85;
  white-space: nowrap;
}

.lb-close{
  position:absolute;
  right: 16px;
  top: 16px;
  z-index: 3;
  font-size: 26px;
  width: 44px; height: 44px;
  border-radius: 14px;
  padding:0;
}
.lb-nav{
  position:absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 3;
  width: 46px; height: 56px;
  font-size: 30px;
  border-radius: 16px;
}
.lb-prev{ left: 14px; }
.lb-next{ right: 14px; }