/* ================= BASE ================= */
body{
  margin:0;
  font-family:'Segoe UI', sans-serif;
  background:linear-gradient(180deg,#4fc3f7,#0d47a1);
  color:white;
  overflow-x:hidden;
}

/* ================= HEADER ================= */
header{
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:15px 20px;
}

/* ================= HERO ================= */
.galeria-header{
  padding:120px 20px 60px;
  text-align:center;
}

.galeria-title{
  font-size:clamp(2.5rem,6vw,4rem);

  background:linear-gradient(45deg,#ffffff,#4fc3f7);
  -webkit-background-clip:text;
  background-clip:text;

  color:transparent;

  text-shadow:
    0 0 10px rgba(79,195,247,0.6),
    0 0 30px rgba(79,195,247,0.9),
    0 0 60px rgba(79,195,247,1);
}

.galeria-sub{
  text-align:center;
  font-size:clamp(1rem,2.5vw,1.3rem);
  margin-top:10px;
  opacity:.85;
}

/* ================= BOTON ================= */
.upload-btn-container{
  text-align:center;
  margin:30px 0;
}

.btn-upload{
  padding:14px 32px;
  border:none;
  border-radius:30px;

  background:linear-gradient(135deg,#4fc3f7,#0d47a1);
  color:white;

  font-size:16px;
  font-weight:600;
  cursor:pointer;

  position:relative;
  overflow:hidden;

  transition:.3s;

  box-shadow:
    0 5px 15px rgba(13,71,161,0.4),
    0 0 10px rgba(79,195,247,0.3);
}

.btn-upload:hover{
  transform:translateY(-3px) scale(1.05);

  box-shadow:
    0 10px 25px rgba(13,71,161,0.6),
    0 0 20px rgba(79,195,247,0.7);
}

.btn-upload:active{
  transform:scale(0.95);
}

/* EFECTO BRILLO */
.btn-upload::after{
  content:"";
  position:absolute;
  top:0;
  left:-100%;
  width:100%;
  height:100%;

  background:linear-gradient(
    120deg,
    transparent,
    rgba(255,255,255,0.4),
    transparent
  );

  transition:0.6s;
}

.btn-upload:hover::after{
  left:100%;
}

/* ================= GALERIA ================= */
.galeria{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(220px,1fr));
  gap:15px;
  padding:20px;
}

.card-img{
  position:relative;
  border-radius:15px;
  overflow:hidden;
}

.card-img img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:.3s;
}

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

.user-tag{
  position:absolute;
  bottom:0;
  width:100%;
  padding:8px;

  background:linear-gradient(transparent,rgba(0,0,0,0.8));
  font-size:13px;
}

/* ================= VIEWER ================= */
.viewer{
  position:fixed;
  inset:0;
  background:black;

  display:flex;
  justify-content:center;
  align-items:center;

  opacity:0;
  pointer-events:none;

  transition:.3s;
  z-index:11000;
}

.viewer.active{
  opacity:1;
  pointer-events:auto;
}

.viewer img{
  max-width:90%;
  max-height:90%;
}

.viewer-close{
  position:absolute;
  top:20px;
  right:20px;
  font-size:25px;
  cursor:pointer;
}

/* ================= MODAL ================= */
.modal{
  position:fixed;
  inset:0;

  background:rgba(0,0,0,0.75);
  backdrop-filter:blur(6px);

  display:flex;
  justify-content:center;
  align-items:center;

  opacity:0;
  pointer-events:none;

  transition:.3s ease;
  z-index:10000;
}

.modal.active{
  opacity:1;
  pointer-events:auto;
}

/* CONTENEDOR */
.modal-content{
  width:90%;
  max-width:360px;

  background:linear-gradient(180deg,#0f2a3a,#122f42);
  border-radius:20px;
  padding:25px;

  box-shadow:0 10px 40px rgba(0,0,0,0.5);

  text-align:center;
  color:white;

  transform:scale(.9);
  opacity:0;

  transition:.3s ease;
}

.modal.active .modal-content{
  transform:scale(1);
  opacity:1;
}

/* TITULO */
.modal-title{
  margin-bottom:15px;
  font-size:18px;
  font-weight:bold;
}

/* INPUT */
.modal input[type="text"]{
  width:100%;
  padding:12px;
  border:none;
  border-radius:12px;

  background:#2a3d4a;
  color:white;

  margin-bottom:15px;
}

/* DROP AREA */
.drop-area{
  display:block;
  border:2px dashed #4fc3f7;
  border-radius:15px;

  padding:25px 10px;
  margin-bottom:15px;

  cursor:pointer;
  transition:.3s;
}

.drop-area:hover{
  background:rgba(79,195,247,0.1);
}

.drop-area input{
  display:none;
}

/* PREVIEW */
#preview{
  width:100%;
  border-radius:10px;
  margin-bottom:10px;
  display:none;
}

/* BOTON SUBIR */
#upload{
  width:100%;
  padding:14px;

  border:none;
  border-radius:15px;

  background:linear-gradient(90deg,#4fc3f7,#2979ff);
  color:white;

  font-size:16px;
  cursor:pointer;

  transition:.3s;
}

#upload:hover{
  transform:scale(1.05);
  box-shadow:0 0 15px rgba(79,195,247,0.6);
}

/* CLOSE */
.close{
  position:absolute;
  top:15px;
  right:20px;
  font-size:20px;
  cursor:pointer;
}

/* ================= RESPONSIVE ================= */
@media(max-width:768px){

  .galeria-header{
    padding:90px 15px 40px;
  }

  .galeria-title{
    font-size:32px;
  }

  .galeria{
    grid-template-columns:1fr;
  }

  .btn-upload{
    width:85%;
    font-size:15px;
  }

}