/* ===== LOADER ===== */
.loader-screen{
  position:fixed; inset:0; z-index:var(--z-loader);
  display:flex; align-items:center; justify-content:center;
  background:var(--bg-0);
  transition:opacity .6s var(--ease-smooth), visibility .6s;
}
.loader-screen.loaded{opacity:0; visibility:hidden; pointer-events:none;}
.loader-core{position:relative; text-align:center;}
.loader-ring{
  position:absolute; top:50%; left:50%;
  width:80px; height:80px; margin:-40px 0 0 -40px;
  border-radius:50%;
  border:3px solid transparent;
  border-top-color:var(--accent-1);
  animation:spin 1.4s linear infinite;
}
.ring2{width:110px; height:110px; margin:-55px 0 0 -55px; border-top-color:var(--accent-2); animation-duration:1.8s;}
.ring3{width:140px; height:140px; margin:-70px 0 0 -70px; border-top-color:var(--accent-3); animation-duration:2.2s;}
.loader-text{margin-top:90px; color:var(--text-1); font-size:14px; letter-spacing:1px;}

/* ===== CARDS ===== */
.card{
  border-radius:var(--radius-lg);
  padding:22px;
  transition:transform .35s var(--ease-smooth), box-shadow .35s var(--ease-smooth);
  position:relative; overflow:hidden;
}
.card:hover{transform:translateY(-6px); box-shadow:var(--glow-cyan);}
.card-icon{font-size:36px; margin-bottom:12px; display:inline-block;}
.card h3{font-size:16px; margin-bottom:6px;}
.card p{font-size:13px;}

/* ===== BUTTONS ===== */
.btn{
  display:inline-flex; align-items:center; gap:8px;
  padding:10px 20px; border-radius:var(--radius-md);
  font-weight:600; font-size:13px;
  background:var(--grad-primary); color:#04101a;
  box-shadow:var(--glow-cyan);
  transition:transform .25s var(--ease-bounce), filter .25s;
}
.btn:hover{transform:translateY(-3px) scale(1.02); filter:brightness(1.1);}
.btn.secondary{background:rgba(255,255,255,0.06); color:var(--text-0); box-shadow:none; border:1px solid var(--glass-border);}
.btn.warm{background:var(--grad-warm); color:#1a0d02;}

/* ===== ABILITY MODULE ===== */
.ability-module{
  border-radius:var(--radius-xl);
  padding:28px;
  margin-bottom:36px;
  position:relative;
}
.ability-header{display:flex; align-items:center; gap:16px; margin-bottom:18px;}
.ability-header .card-icon{font-size:40px;}
.ability-header h2{font-size:22px;}
.ability-header .tag{
  font-size:11px; padding:3px 10px; border-radius:20px;
  background:rgba(255,255,255,0.08); color:var(--text-2);
}

.vs-stage{
  display:grid; grid-template-columns:1fr auto 1fr; gap:20px; align-items:center;
  margin:20px 0;
}
.vs-panel{
  border-radius:var(--radius-lg);
  padding:20px; min-height:220px;
  display:flex; flex-direction:column; align-items:center; text-align:center; gap:10px;
}
.vs-panel.human{background:linear-gradient(160deg, rgba(255,45,149,0.10), rgba(124,58,237,0.06));}
.vs-panel.machine{background:linear-gradient(160deg, rgba(0,229,255,0.10), rgba(0,255,163,0.06));}
.vs-divider{
  display:flex; flex-direction:column; align-items:center; gap:6px;
  font-size:12px; color:var(--text-2); font-weight:700;
}
.vs-divider .vs-bolt{font-size:28px; animation:pulseGlow 2s ease-in-out infinite;}

.panel-visual{width:100%; height:140px; display:flex; align-items:center; justify-content:center;}
.panel-visual svg{width:120px; height:120px;}
.panel-list{font-size:12px; color:var(--text-1); text-align:left; width:100%;}
.panel-list li{padding:3px 0; border-bottom:1px dashed rgba(255,255,255,0.08);}

.compare-table{width:100%; border-collapse:collapse; font-size:13px; margin-top:12px;}
.compare-table th, .compare-table td{padding:10px 12px; text-align:left; border-bottom:1px solid rgba(255,255,255,0.08);}
.compare-table th{color:var(--text-2); font-size:11px; text-transform:uppercase; letter-spacing:0.5px;}
.badge{padding:2px 10px; border-radius:12px; font-size:11px; font-weight:700;}
.badge.human{background:rgba(255,45,149,0.18); color:#ff8fc2;}
.badge.machine{background:rgba(0,229,255,0.18); color:#7fe9ff;}
.badge.both{background:rgba(255,184,0,0.18); color:#ffd77f;}

.chip-row{display:flex; flex-wrap:wrap; gap:8px; margin-top:10px;}
.chip{
  font-size:12px; padding:5px 12px; border-radius:20px;
  background:rgba(255,255,255,0.05); border:1px solid var(--glass-border);
  color:var(--text-1);
}

.fun-fact{
  margin-top:16px; padding:14px 18px; border-radius:var(--radius-md);
  background:linear-gradient(120deg, rgba(255,184,0,0.08), rgba(255,45,149,0.05));
  border-left:3px solid var(--accent-5);
  font-size:13px; color:var(--text-1);
}
.fun-fact strong{color:var(--accent-5);}

.engineer-tip{
  margin-top:10px; padding:14px 18px; border-radius:var(--radius-md);
  background:linear-gradient(120deg, rgba(0,229,255,0.08), rgba(124,58,237,0.06));
  border-left:3px solid var(--accent-1);
  font-size:13px;
}

.minigame-launch{
  display:flex; align-items:center; justify-content:space-between;
  margin-top:16px; padding:14px 18px; border-radius:var(--radius-md);
  background:rgba(255,255,255,0.03); border:1px dashed var(--glass-border);
}

/* ===== MODAL ===== */
.modal-overlay{
  position:fixed; inset:0; z-index:var(--z-modal);
  background:rgba(3,5,10,0.75); backdrop-filter:blur(6px);
  display:none; align-items:center; justify-content:center; padding:20px;
}
.modal-overlay.active{display:flex;}
.modal-content{
  max-width:720px; width:100%; max-height:85vh; overflow-y:auto;
  border-radius:var(--radius-lg); padding:28px;
}
.modal-close{position:absolute; top:16px; right:16px; font-size:20px; color:var(--text-2);}

/* ===== ABILITY GRID (Level 2 index) ===== */
.ability-nav-grid{margin-bottom:40px;}
.ability-nav-item{
  cursor:pointer; text-align:center;
}
.ability-nav-item .card-icon{transition:transform .3s var(--ease-bounce);}
.ability-nav-item:hover .card-icon{transform:scale(1.25) rotate(8deg);}

/* progress ring for level4 */
.curiosity-bar{
  height:8px; border-radius:8px; background:rgba(255,255,255,0.08); overflow:hidden; margin-top:6px;
}
.curiosity-fill{height:100%; background:var(--grad-primary); width:0%; transition:width .6s var(--ease-smooth);}

.domain-node{
  padding:14px 18px; border-radius:var(--radius-md);
  text-align:center; font-size:13px; font-weight:600;
  background:rgba(255,255,255,0.04); border:1px solid var(--glass-border);
  transition:all .3s;
}
.domain-node:hover{background:rgba(0,229,255,0.08); box-shadow:var(--glow-cyan); transform:translateY(-3px);}

.hero-panel{
  border-radius:var(--radius-xl); padding:40px; text-align:center; margin-bottom:36px;
  background:linear-gradient(150deg, rgba(0,229,255,0.08), rgba(124,58,237,0.08));
  position:relative; overflow:hidden;
}
.hero-panel h2{font-size:30px; margin-bottom:10px;}
.hero-panel p{max-width:640px; margin:0 auto 20px; font-size:14px;}

.example-strip{display:flex; gap:16px; overflow-x:auto; padding:10px 4px 20px;}
.example-strip .card{min-width:140px; flex-shrink:0;}

/* ================================================================
   Engineering Explorer progress and badge patch
   ================================================================ */

.explorer-progress{
  max-width:720px;
  margin:0 auto 18px;
  padding:10px 14px;
  border:1px solid var(--glass-border);
  border-radius:var(--radius-md);
  background:rgba(8,18,38,0.58);
  backdrop-filter:blur(10px);
}

.explorer-progress-title{
  display:flex;
  justify-content:space-between;
  gap:12px;
  font-size:12px;
  color:var(--text-1);
  margin-bottom:7px;
}

.explorer-progress-title span:last-child{
  color:var(--text-2);
}

.explorer-progress-track{
  height:8px;
  border-radius:99px;
  background:rgba(255,255,255,0.08);
  overflow:hidden;
}

.explorer-progress-fill{
  height:100%;
  border-radius:99px;
  background:var(--grad-primary);
  box-shadow:var(--glow-cyan);
  transition:width .55s var(--ease-smooth);
}

.badge-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit, minmax(180px, 1fr));
  gap:12px;
  margin-top:16px;
}

.badge-card{
  padding:14px;
  border:1px solid var(--glass-border);
  border-radius:var(--radius-md);
  background:rgba(255,255,255,0.035);
}

.badge-card.locked{
  opacity:.42;
  filter:grayscale(1);
}

.badge-card-icon{
  display:block;
  font-size:28px;
  margin-bottom:7px;
}

.badge-card h4{
  margin:0 0 5px;
  font-size:14px;
  color:var(--text-0);
}

.badge-card p{
  margin:0;
  font-size:12px;
  color:var(--text-2);
}

.badge-toast{
  position:fixed;
  right:22px;
  bottom:22px;
  z-index:6000;
  display:flex;
  align-items:center;
  gap:12px;
  max-width:330px;
  padding:14px 16px;
  border:1px solid var(--accent-5);
  border-radius:var(--radius-md);
  transform:translateY(120px);
  opacity:0;
  transition:all .35s var(--ease-smooth);
  box-shadow:var(--glow-cyan);
}

.badge-toast.show{
  transform:translateY(0);
  opacity:1;
}

.badge-toast-icon{
  font-size:32px;
}

.badge-toast strong{
  font-size:14px;
  color:var(--accent-5);
}

.badge-toast span{
  font-size:12px;
  color:var(--text-1);
}

@media (max-width:640px){
  .explorer-progress-title{
    font-size:11px;
  }

  .badge-toast{
    left:14px;
    right:14px;
    bottom:14px;
    max-width:none;
  }
}