/* ====== BASE MODERNA ====== */
: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-dark: #0099cc;
  --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 DE 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);} }

/* ====== NOTIFICACIONES ====== */
.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 WRAP ====== */
.ui-wrap {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
  background: var(--bg-gradient);
}

/* ====== TARJETAS ====== */
.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; }

/* ====== INPUTS ====== */
.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; }

/* ====== BOTONES ====== */
.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; }

/* ====== PASOS ====== */
.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); }

/* ====== INSTRUCCIONES ====== */
.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);
}

/* ====== TIP ====== */
.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; }

/* ====== RESULTADOS ====== */
.results-summary{
  display:grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 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;
}

/* ====== GUARDADO ====== */
.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%} }

/* ====== ERROR ====== */
.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; }

/* ====== FULLSCREEN TASK ====== */
.task-screen{
  position: fixed; inset:0;
  width:100vw; height:100vh;
  background:#000;
  overflow:hidden;
  z-index:9999;
  display:flex;
  align-items:center;
  justify-content:center;
}
.trial-counter{
  position:absolute; top:20px; left:20px;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(10px);
  border-radius:20px;
  padding:10px 20px;
  display:flex; align-items:center; gap:6px;
  font-size:18px; font-weight:700;
  color: var(--accent);
  z-index:100;
  border:2px solid rgba(0,212,255,0.3);
}
.counter-separator{ color: var(--text-muted); margin:0 4px; }

.fixation{
  position:absolute;
  top:50%; left:50%;
  transform: translate(-50%, -50%);
  font-size: 72px;
  color: var(--accent);
  opacity:0.9;
  z-index:10;
  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} }

.response-indicator{
  position:absolute;
  top:20px; right:20px;
  width:50px; height:50px;
  background: rgba(0,255,157,0.2);
  border-radius:50%;
  display:flex; align-items:center; justify-content:center;
  font-size:24px;
  color: var(--success);
  z-index:100;
  opacity:0;
  transform: scale(0);
  transition: all 0.3s cubic-bezier(0.68,-0.55,0.265,1.55);
}
.response-indicator.show{ opacity:1; transform: scale(1); }
.response-indicator.error{ background: rgba(255,71,87,0.2); color: var(--error); }

/* ====== NUEVO: ESTÍMULO CENTRAL SST ====== */
.center-stim{
  position:absolute;
  top:50%; left:50%;
  transform: translate(-50%, -50%);
  width: 240px;
  height: 240px;
  display:flex;
  align-items:center;
  justify-content:center;
  z-index: 20;
}

.go-arrow{
  font-size: 140px;
  font-weight: 800;
  color: #ffffff;
  text-shadow: 0 0 18px rgba(255,255,255,0.35);
  user-select:none;
}

.stop-signal{
  position:absolute;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  border: 14px solid rgba(255,71,87,0.95);
  box-shadow:
    0 0 35px rgba(255,71,87,0.55),
    0 0 70px rgba(255,71,87,0.25);
  animation: stop-pulse 0.45s ease-in-out infinite;
  pointer-events:none;
}
@keyframes stop-pulse{
  0%,100%{ transform: scale(1); opacity: 0.95; }
  50%{ transform: scale(1.04); opacity: 0.8; }
}

/* ====== RESPONSIVE ====== */
@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%; }
  .instruction-step{ flex-direction: column; text-align:center; }
  .trial-counter{ top:10px; left:10px; padding:8px 16px; font-size:14px; }
  .fixation{ font-size:56px; }
  .go-arrow{ font-size: 110px; }
  .center-stim{ width: 200px; height: 200px; }
  .stop-signal{ width: 185px; height:185px; border-width: 12px; }
}