:root{
  --bg: #0b0b11;
  --card: #141422;
  --card-hover: #1b1b2d;
  --text: #f1f1f4;
  --muted: #b8b8c7;
  --accent: #b388ff; /* lilás */
  --accent-2: #bfcab3; /* verde oliva claro (suave) */
  --radius: 18px;
  --shadow: 0 10px 30px 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, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  background: radial-gradient(1200px 700px at 20% -10%, rgba(179,136,255,.18), transparent 60%),
              radial-gradient(1000px 600px at 120% 0%, rgba(191,202,179,.12), transparent 60%),
              var(--bg);
  color:var(--text);
}
a{color:inherit}

.container{
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 20px 60px;
}

header.page-header{
    margin-top: 60px;
  display:flex; align-items:center; justify-content:space-between;
  gap:16px; margin-bottom:26px;
}
.title{
  display:flex; flex-direction:column; gap:4px;
}
.title h1{margin:0; font-size: clamp(22px, 2.4vw, 34px);}    
.title p{margin:0; color:var(--muted)}

.back-link{
  text-decoration:none; border:1px solid rgba(255,255,255,.12);
  padding:10px 14px; border-radius: 999px; transition:.2s ease;
  background: linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,0));
}
.back-link:hover{border-color:rgba(255,255,255,.22); transform: translateY(-1px)}

/* Filtro / controles (opcional, já funcional) */
.toolbar{display:flex; gap:12px; flex-wrap:wrap; margin:18px 0 12px}
.search{flex:1 1 260px; min-width: 220px;}
input[type="search"]{
  width:100%; padding:12px 14px; border-radius: 12px; border:1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.06); color: var(--text); outline:none;
}
input[type="search"]::placeholder{color:#a6a6b6}
.chip{
  border:1px solid rgba(255,255,255,.12); border-radius:999px; padding:8px 12px; cursor:pointer;
  background: rgba(255,255,255,.04);
}

/* Grade da galeria */
.certs-grid{
  display:grid; gap:16px; margin-top:12px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.cert-card{
  position:relative; overflow:hidden; border-radius: var(--radius);
  background: var(--card); box-shadow: var(--shadow);
  border: 1px solid rgba(255,255,255,.08);
  transition: transform .18s ease, background .18s ease, border-color .18s ease;
  /* Mantém retângulo na horizontal (A4 landscape ~1.414) */
  aspect-ratio: 7 / 5; 
  display:flex; align-items:center; justify-content:center;
}
.cert-card:hover{ transform: translateY(-2px); background: var(--card-hover); border-color: rgba(255,255,255,.16)}

.cert-card img{
  width:100%; height:100%; object-fit: cover; display:block;
  filter: saturate(1.02);
}
.cert-badge{
  position:absolute; left:10px; top:10px; font-size:12px; padding:6px 10px; border-radius:999px;
  background: rgba(179,136,255,.15); color: #e7dcff; border:1px solid rgba(179,136,255,.4);
}
.cert-caption{
  position:absolute; left:0; right:0; bottom:0; padding:10px 12px; font-size:14px;
  background: linear-gradient(180deg, rgba(0,0,0,0) 0%, rgba(0,0,0,.65) 70%);
  color:#f7f7fb;
}
.cert-caption small{display:block; color:#cfd0df; opacity:.9}

/* Lightbox */
.lightbox{ position: fixed; inset:0; display:none; place-items:center; background: rgba(5,6,10,.75); z-index: 50; }
.lightbox.show{ display:grid; }
.lightbox-content{ position:relative; width:min(92vw, 1200px); }
.lightbox-figure{ background:#000; border-radius: 16px; overflow:hidden; border:1px solid rgba(255,255,255,.15); box-shadow: var(--shadow); }
.lightbox-figure img{ width:100%; height:auto; display:block; }
.lightbox-caption{ padding:10px 14px; color:#e9e9f6; font-size:14px; background: #0c0c11; border-top:1px solid rgba(255,255,255,.08)}

.lightbox-close, .lightbox-prev, .lightbox-next{
  position:absolute; top:50%; transform: translateY(-50%);
  border:none; cursor:pointer; padding:12px; border-radius: 999px;
  background: rgba(255,255,255,.1); color:#fff; backdrop-filter: blur(6px);
}
.lightbox-close{ top:-18px; right:-18px; transform:none; }
.lightbox-prev{ left:-58px; }
.lightbox-next{ right:-58px; }
.lightbox-close:hover, .lightbox-prev:hover, .lightbox-next:hover{ background: rgba(255,255,255,.18)}

@media (max-width: 800px){
  .lightbox-prev{ left:6px; top:auto; bottom: 10px; transform:none }
  .lightbox-next{ right:6px; top:auto; bottom: 10px; transform:none }
  .lightbox-close{ right:10px; top:10px }
}