/* ====== BASE (igual que tu plantilla) ====== */
:root{
  --bg:#0a0a14;
  --bg-gradient:linear-gradient(135deg,#0a0a14 0%,#1a1a2e 100%);
  --text:#ffffff;
  --text-muted:rgba(255,255,255,0.7);
  --text-light:rgba(255,255,255,0.9);
  --card:rgba(18,18,30,0.95);
  --card-border:rgba(255,255,255,0.1);
  --accent:#00d4ff;
  --accent-gradient:linear-gradient(135deg,#00d4ff 0%,#0099cc 100%);
  --success:#00ff9d;
  --warning:#ffcc00;
  --error:#ff4757;
  --go-color:#00ff9d;
  --nogo-color:#ff4757;
  --shadow:0 8px 32px rgba(0,0,0,0.3);
  --shadow-lg:0 20px 60px rgba(0,0,0,0.5);
  --border-radius:16px;
  --border-radius-sm:12px;
  --transition:all 0.3s cubic-bezier(0.4,0,0.2,1);
}

*{box-sizing:border-box;margin:0;padding:0;}
html,body{
  height:100%;
  font-family:'Inter',system-ui,-apple-system,sans-serif;
  background:var(--bg-gradient);
  color:var(--text);
  overflow-x:hidden;
}

/* ====== ESTADO CONEXIÓN ====== */
.connection-status{
  position:fixed; top:16px; right:16px; z-index:1000;
  display:flex; gap:12px; align-items:center;
}
.connection-indicator,.sync-indicator{
  background:rgba(0,0,0,0.6);
  backdrop-filter:blur(10px);
  border:1px solid rgba(255,255,255,0.1);
  border-radius:20px;
  padding:8px 16px;
  display:flex; align-items:center; gap:8px;
  font-size:12px; font-weight:500;
  transition:var(--transition);
}
.connection-indicator.online{color:var(--success);border-color:rgba(0,255,157,0.3);}
.connection-indicator.offline{color:var(--error);border-color:rgba(255,71,87,0.3);}
.sync-indicator{color:var(--accent);border-color:rgba(0,212,255,0.3);}
.sync-indicator.syncing i{animation:spin 1s linear infinite;}
@keyframes spin{from{transform:rotate(0deg)} to{transform:rotate(360deg)}}

/* ====== NOTIF ====== */
.notification{
  position:fixed; top:20px; left:50%;
  transform:translateX(-50%) translateY(-100px);
  background:rgba(0,212,255,0.95);
  backdrop-filter:blur(10px);
  border-radius:var(--border-radius-sm);
  padding:16px 24px;
  display:flex; align-items:center; gap:12px;
  z-index:1001;
  box-shadow:var(--shadow);
  transition:transform 0.4s cubic-bezier(0.68,-0.55,0.265,1.55);
}
.notification.show{transform:translateX(-50%) translateY(0);}
.notification i{font-size:20px;}
.notification.success{background:rgba(0,255,157,0.95);}
.notification.error{background:rgba(255,71,87,0.95);}
.notification.warning{background:rgba(255,204,0,0.95);}

/* ====== UI ====== */
.ui-wrap{
  min-height:100vh;
  display:flex; align-items:center; justify-content:center;
  padding:20px;
  background:var(--bg-gradient);
}
.card-elegant{
  width:min(800px,95vw);
  background:var(--card);
  border:1px solid var(--card-border);
  border-radius:var(--border-radius);
  padding:32px;
  backdrop-filter:blur(20px);
  box-shadow:var(--shadow-lg);
  position:relative;
  overflow:hidden;
}
.card-elegant::before{
  content:'';
  position:absolute; top:0; left:0; right:0;
  height:4px; background:var(--accent-gradient);
}
.card-header{display:flex;align-items:center;gap:16px;margin-bottom:24px;}
.card-icon{
  width:60px;height:60px;
  background:rgba(0,212,255,0.1);
  border-radius:16px;
  display:flex;align-items:center;justify-content:center;
  font-size:24px;color:var(--accent);
  border:2px solid rgba(0,212,255,0.2);
}
.card-icon.success{
  background:rgba(0,255,157,0.1);
  color:var(--success);
  border-color:rgba(0,255,157,0.2);
}
.card-elegant h1{
  font-size:28px;font-weight:700;
  background:linear-gradient(135deg,#ffffff 0%, var(--accent) 100%);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}
.muted{color:var(--text-muted);font-size:15px;line-height:1.6;margin-bottom:24px;}

.input-group{margin-bottom:24px;}
.label{display:block;margin-bottom:8px;}
.label span{
  display:block;font-size:14px;font-weight:600;color:var(--text-light);
  margin-bottom:8px;text-transform:uppercase;letter-spacing:0.5px;
}
.input-with-icon{position:relative;display:flex;align-items:center;}
.input-with-icon i{position:absolute;left:16px;color:var(--accent);font-size:18px;z-index:1;}
.input-with-icon input{
  width:100%;
  padding:16px 16px 16px 48px;
  background:rgba(255,255,255,0.05);
  border:2px solid rgba(255,255,255,0.1);
  border-radius:var(--border-radius-sm);
  color:var(--text);
  font-size:16px;font-weight:500;
  transition:var(--transition);
}
.input-with-icon input:focus{
  outline:none;
  border-color:var(--accent);
  background:rgba(0,212,255,0.05);
  box-shadow:0 0 0 3px rgba(0,212,255,0.1);
}
.input-hint{display:block;font-size:12px;color:var(--text-muted);margin-top:6px;font-style:italic;}

.btn-modern{
  padding:16px 28px;
  border-radius:var(--border-radius-sm);
  border:none;
  font-size:16px;font-weight:600;
  cursor:pointer;
  transition:var(--transition);
  display:inline-flex;align-items:center;justify-content:center;
  gap:10px;
  text-transform:uppercase;
  letter-spacing:0.5px;
}
.btn-modern.primary{
  background:var(--accent-gradient);
  color:white;
  box-shadow:0 4px 15px rgba(0,212,255,0.3);
}
.btn-modern.primary:hover{transform:translateY(-2px);box-shadow:0 8px 25px rgba(0,212,255,0.4);}
.btn-modern.secondary{
  background:rgba(255,255,255,0.1);
  color:var(--text);
  border:2px solid rgba(255,255,255,0.2);
}
.btn-modern.secondary:hover{background:rgba(255,255,255,0.2);border-color:rgba(255,255,255,0.3);}
.ui-actions{display:flex;gap:16px;margin-top:32px;}

.step-indicator{
  display:flex;justify-content:center;gap:12px;
  margin-top:32px;padding-top:24px;
  border-top:1px solid rgba(255,255,255,0.1);
}
.step{
  width:36px;height:36px;border-radius:50%;
  background:rgba(255,255,255,0.1);
  display:flex;align-items:center;justify-content:center;
  font-weight:700;font-size:14px;color:var(--text-muted);
  transition:var(--transition);
}
.step.active{background:var(--accent-gradient);color:white;box-shadow:0 4px 12px rgba(0,212,255,0.4);}

.instructions-container{display:flex;flex-direction:column;gap:20px;margin:24px 0;}
.instruction-step{
  display:flex;align-items:center;gap:20px;
  padding:20px;
  background:rgba(255,255,255,0.05);
  border-radius:var(--border-radius-sm);
  transition:var(--transition);
}
.instruction-step:hover{background:rgba(255,255,255,0.08);transform:translateX(4px);}
.instruction-icon{
  width:50px;height:50px;border-radius:12px;
  background:rgba(0,212,255,0.1);
  display:flex;align-items:center;justify-content:center;
  font-size:22px;color:var(--accent);flex-shrink:0;
}
.instruction-icon.go{background:rgba(0,255,157,0.1);color:var(--go-color);}
.instruction-icon.nogo{background:rgba(255,71,87,0.1);color:var(--nogo-color);}
.instruction-content h3{font-size:18px;font-weight:600;margin-bottom:4px;color:var(--text-light);}
.instruction-content p{color:var(--text-muted);font-size:14px;line-height:1.5;}
.highlight{color:var(--accent);font-weight:700;font-size:20px;}
.keyboard-key{
  display:inline-block;padding:4px 10px;
  background:rgba(255,255,255,0.1);
  border-radius:6px;
  font-family:monospace;
  font-weight:700;
  color:var(--accent);
  border:1px solid rgba(255,255,255,0.2);
}

.performance-tip{
  display:flex;align-items:center;gap:12px;
  padding:16px;
  background:rgba(0,212,255,0.1);
  border-radius:var(--border-radius-sm);
  border-left:4px solid var(--accent);
  margin:24px 0;
}
.performance-tip i{font-size:20px;color:var(--accent);flex-shrink:0;}
.performance-tip p{color:var(--text-light);font-size:14px;line-height:1.5;}

.results-summary{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(250px,1fr));
  gap:20px;
  margin:24px 0;
}
.result-item{
  display:flex;align-items:center;gap:16px;
  padding:20px;
  background:rgba(255,255,255,0.05);
  border-radius:var(--border-radius-sm);
  transition:var(--transition);
}
.result-item:hover{background:rgba(255,255,255,0.08);transform:translateY(-2px);}
.result-icon{
  width:50px;height:50px;border-radius:12px;
  background:rgba(0,212,255,0.1);
  display:flex;align-items:center;justify-content:center;
  font-size:22px;color:var(--accent);flex-shrink:0;
}
.result-info{display:flex;flex-direction:column;}
.result-label{
  font-size:12px;text-transform:uppercase;
  letter-spacing:1px;color:var(--text-muted);margin-bottom:4px;
}
.result-value{
  font-size:24px;font-weight:700;color:var(--text-light);
  background:linear-gradient(135deg,#ffffff 0%, var(--accent) 100%);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}

.save-status-container{margin:32px 0;}
.save-status{
  display:flex;align-items:center;gap:20px;
  padding:24px;
  background:rgba(0,212,255,0.1);
  border-radius:var(--border-radius-sm);
  border:2px solid rgba(0,212,255,0.2);
}
.save-icon{
  width:60px;height:60px;border-radius:50%;
  background:rgba(0,212,255,0.2);
  display:flex;align-items:center;justify-content:center;
  font-size:28px;color:var(--accent);flex-shrink:0;
}
.save-content{flex:1;}
.save-content h3{font-size:18px;font-weight:600;margin-bottom:8px;color:var(--text-light);}
.save-content p{color:var(--text-muted);font-size:14px;margin-bottom:12px;}
.progress-bar{height:6px;background:rgba(255,255,255,0.1);border-radius:3px;overflow:hidden;}
.progress-fill{
  height:100%;width:0%;
  background:var(--accent-gradient);
  border-radius:3px;
  animation:progress-load 2s ease-in-out infinite;
}
@keyframes progress-load{0%{width:0%}50%{width:70%}100%{width:100%}}

.ui-error{
  width:min(800px,95vw);
  margin:0 auto 20px;
  padding:20px;
  border-radius:var(--border-radius-sm);
  background:rgba(255,71,87,0.1);
  border:2px solid rgba(255,71,87,0.3);
  color:#ffdede;
  font-size:14px;
  line-height:1.5;
}
.ui-error::before{content:'⚠️ ';margin-right:8px;}
.hidden{display:none !important;}

/* ====== TASK FULLSCREEN (solo prueba) ====== */
.task-screen{
  position:fixed;
  inset:0;
  width:100vw;
  height:100vh;
  background:#000;
  overflow:hidden;
  z-index:9999;
}

.fixation{
  position:absolute;
  top:50%;
  left:50%;
  transform:translate(-50%,-50%);
  font-size:72px;
  color:var(--accent);
  opacity:0.9;
  user-select:none;
  pointer-events:none;
  text-shadow:0 0 20px rgba(0,212,255,0.5);
  animation:pulse 2s ease-in-out infinite;
}
@keyframes pulse{0%,100%{opacity:0.9}50%{opacity:0.7}}

.choice{
  position:absolute;
  top:50%;
  transform:translate(-50%,-50%);
  font-size:160px;
  font-weight:800;
  letter-spacing:2px;
  color:#ffffff;
  text-shadow:0 0 18px rgba(255,255,255,0.25);
  user-select:none;
  pointer-events:none;
}
.choice-left{ left:25%; }
.choice-right{ left:75%; }

.choice.flash-correct{
  text-shadow:
    0 0 18px rgba(255,255,255,0.25),
    0 0 32px rgba(0,255,157,0.35);
}
.choice.flash-wrong{
  text-shadow:
    0 0 18px rgba(255,255,255,0.25),
    0 0 32px rgba(255,71,87,0.35);
}

@media (max-width: 768px){
  .card-elegant{padding:24px;}
  .card-header{flex-direction:column;text-align:center;gap:12px;}
  .card-elegant h1{font-size:24px;}
  .ui-actions{flex-direction:column;}
  .btn-modern{width:100%;}
  .fixation{font-size:56px;}
  .choice{font-size:120px;}
  .choice-left{left:22%;}
  .choice-right{left:78%;}
}