* { margin:0; padding:0; box-sizing:border-box;}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  background: linear-gradient(120deg,#021,#010,#201);
  overflow-x: hidden;
  color: white;
  padding: 20px;
  -webkit-user-select: none;
  -moz-user-select: none;    
  -ms-user-select: none;  
  user-select: none;       
}

body::before {
  content: "";
  position: fixed; 
  top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: radial-gradient(circle at 20% 30%, rgba(0,255,150,0.1), transparent),
              radial-gradient(circle at 80% 70%, rgba(150,0,255,0.1), transparent);
  animation: moveBg 10s infinite alternate ease-in-out;
  z-index: -1;
}

@keyframes moveBg {
  from { transform: translate(-10%, -10%); }
  to { transform: translate(10%, 10%); }
}

.card {
  position: relative;
  width: 100%;
  max-width: 380px;
  padding: 30px;
  border-radius: 25px;
  background: rgba(255,255,255,0.05);
  backdrop-filter: blur(15px);
  text-align: center;
  animation: appear 0.8s ease;
  z-index: 2;
  margin: auto;
  font-family: Arial, sans-serif; 
}

@keyframes appear {
  from { transform: scale(0.8); opacity:0; filter:blur(10px);} 
  to { transform: scale(1); opacity:1; filter:blur(0);} 
}

.avatar {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  margin: auto;
  background: url('https://www.ismatrons.com/downloads/yticon.png') center/cover;
  animation: breathe 3s infinite;
}

@keyframes breathe {
  0%,100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

h1 { font-size: clamp(28px,5vw,42px); margin:10px 0; }
p { color:#ccc; font-size: clamp(14px,2.5vw,16px); }

.youtube {
  background: linear-gradient(90deg,#ff0000,#ff4d4d);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight:bold;
}

.java {
  color:#f89820;
  font-weight:bold;
  position:relative;
}

.java::after {
  content:"☕";
  margin-left:5px;
  font-size:0.9em;
}

.btn {
  display:inline-block;
  margin-top:20px;
  padding:12px 24px;
  border-radius:25px;
  background: linear-gradient(90deg,#444,#222);
  color:white;
  text-decoration:none;
  transition:0.3s;
  position:relative;
  overflow:hidden;
}

.btn:hover { transform: scale(1.1); }
.btn::after {
  content:"";
  position:absolute;
  width:120%; height:100%; top:0; left:-120%;
  background: linear-gradient(120deg,transparent,rgba(255,255,255,0.3),transparent);
  transition:0.5s;
}
.btn:hover::after { left:120%; }

.nav {
  position: fixed;
  bottom: 20px;
  display: flex;
  gap: 15px;
  background: rgba(118, 118, 118, 0.5);
  padding: 10px 20px;
  border-radius: 30px;
  backdrop-filter: blur(10px);
  z-index: 100;
   font-family: Arial, sans-serif; 
}

.nav img {
  width: 34px; height: 34px; padding: 6px;          
  object-fit: contain; opacity: 0.7; cursor: pointer;
  transition: 0.3s; border-radius: 20%;    
  border: 1.5px solid transparent; 
}

.nav img:hover { opacity:1; transform: scale(1.2); }

.nav-item { position: relative; display: flex; align-items: center; justify-content: center; }

.tooltip {
  position: absolute; bottom: 45px; background: rgba(0,0,0,0.8);
  color: white; padding: 5px 10px; border-radius: 8px; font-size: 12px;
  opacity: 0; transform: translateY(5px); transition: 0.2s;
  pointer-events: none; white-space: nowrap;
  border: 1px solid rgba(255,255,255,0.1); backdrop-filter: blur(10px);
}

.nav-item:hover .tooltip { opacity: 1; transform: translateY(0); }
.nav-item.active img { background: rgba(255, 255, 255, 0.15); border-color: white; opacity: 1; }

.portfolio {
  position: absolute; inset:0; display:none; padding:20px;
  grid-template-columns: repeat(auto-fit,minmax(140px,1fr)); gap:15px; z-index: 2;
}
.item {
  background:#111; border-radius:15px; height:140px;
  position:relative; overflow:hidden; cursor:pointer; transition:0.3s;
}
.item:hover { transform: scale(1.05); }
.overlay {
  position:absolute; bottom:0; width:100%; background: rgba(0,0,0,0.7);
  padding:10px; transform: translateY(100%); transition:0.3s; font-size:12px;
}
.item:hover .overlay { transform: translateY(0); }

.version { position: fixed; bottom: 10px; left: 10px; font-size: 12px; color: #b0b0b0; z-index: 10;}

.lang-selector {
  position: fixed;
  top: 15px;
  right: 15px;
  z-index: 1000;
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 14px;
  padding-bottom: 15px; 
}

.lang-current {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(15px);
  padding: 8px 16px;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  cursor: pointer;
  transition: 0.3s;
  display: flex;
  align-items: center;
  gap: 8px;
}

.lang-selector:hover .lang-current { background: rgba(255, 255, 255, 0.15); }

.lang-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  background: rgba(15, 15, 15, 0.95);
  backdrop-filter: blur(15px);
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  overflow: hidden;
  opacity: 0;
  transform: translateY(-5px);
  pointer-events: none;
  transition: 0.3s ease;
  min-width: 140px;
}

.lang-selector:hover .lang-dropdown {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.lang-option {
  padding: 10px 16px;
  cursor: pointer;
  transition: 0.2s;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 8px;
}

.lang-option:hover:not(.disabled) { background: rgba(255, 255, 255, 0.1); }
.lang-option.disabled { opacity: 0.4; cursor: not-allowed; }

.lang-flag {
  width: 20px; height: auto;
  border-radius: 2px; object-fit: contain;
}
@media screen and (max-width: 500px) {
  .lang-selector {
    transform: scale(0.9);
    transform-origin: top right;
  }
  
  .card {
    margin-top: 70px;
    margin-bottom: 90px;
    padding: 25px 20px;
  }
  
  .nav {
    width: 90%;
    justify-content: space-evenly;
    gap: 5px;
    padding: 8px;
    bottom: 15px;
  }
  
  .nav img {
    width: 30px;
    height: 30px;
  }

  .tooltip { display: none !important; }
}

@media screen and (max-height: 650px) {
  .card {
    margin-top: 70px;
    margin-bottom: 90px;
  }
}

.banner-top-left {
  position: fixed;
  top: 15px;
  left: 15px;
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 16px;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 20px;
  color: #ffffff;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 13px;
  font-weight: 500;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  transition: transform 0.3s ease, background 0.3s ease;
}

.banner-top-left:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: translateY(1px);
}

.banner-top-left .info-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 1.5px solid rgba(255, 255, 255, 0.85);
  font-size: 11px;
  font-weight: bold;
  line-height: 1;
  flex-shrink: 0;
}

/* Adaptación responsive para pantallas pequeñas */
@media screen and (max-width: 500px) {
  .banner-top-left {
    transform: scale(0.9);
    transform-origin: top left;
    max-width: 200px;
    font-size: 12px;
  }
}