:root{
  --bg:#0a0e1a;
  --bg2:#0f1626;
  --panel:rgba(255,255,255,0.05);
  --panel-2:rgba(255,255,255,0.08);
  --border:rgba(255,255,255,0.1);
  --accent:#00e0ff;
  --accent2:#a855f7;
  --accent3:#ffb703;
  --text:#e8eefc;
  --text-dim:#9aa5c4;
  --green:#22c55e;
  --red:#ef4444;
  --radius:18px;
  --shadow:0 10px 30px rgba(0,0,0,0.35);
  --shadow-glow:0 10px 30px rgba(0,224,255,0.12);
}

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

html{
  scroll-behavior:smooth;
}

body{
  min-height:100vh;
  overflow-x:hidden;
  font-family:"Segoe UI",system-ui,-apple-system,BlinkMacSystemFont,"Helvetica Neue",Arial,sans-serif;
  color:var(--text);
  background:
    radial-gradient(circle at 20% 10%, rgba(0,224,255,0.12), transparent 22%),
    radial-gradient(circle at 80% 20%, rgba(168,85,247,0.12), transparent 25%),
    radial-gradient(circle at 50% 80%, rgba(255,183,3,0.08), transparent 20%),
    linear-gradient(180deg, #0d1220 0%, #090d17 100%);
}

button,
input{
  font:inherit;
}

button{
  cursor:pointer;
}

#app{
  min-height:100vh;
  display:flex;
  flex-direction:column;
}

/* Top Bar */
#top-nav{
  position:sticky;
  top:0;
  z-index:50;
  display:flex;
  align-items:center;
  gap:16px;
  padding:14px 22px;
  background:rgba(10,14,26,0.82);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--border);
}

.brand{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:1.1rem;
  font-weight:700;
  letter-spacing:0.02em;
  background:linear-gradient(90deg,var(--accent),var(--accent2));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  white-space:nowrap;
}

.progress-wrap{
  flex:1;
  min-width:100px;
  height:8px;
  border-radius:999px;
  overflow:hidden;
  border:1px solid var(--border);
  background:rgba(255,255,255,0.06);
}

#progress-bar{
  width:0%;
  height:100%;
  background:linear-gradient(90deg,var(--accent),var(--accent2));
  transition:width .45s ease;
}

.nav-actions{
  display:flex;
  align-items:center;
  gap:10px;
}

#search-input{
  width:190px;
  padding:9px 14px;
  border:none;
  outline:none;
  border-radius:12px;
  color:var(--text);
  background:var(--panel);
  border:1px solid var(--border);
}

#search-input::placeholder{
  color:var(--text-dim);
}

#badges-btn{
  padding:8px 12px;
  border-radius:12px;
  border:1px solid var(--border);
  background:var(--panel);
  color:var(--text);
  transition:.25s ease;
}

#badges-btn:hover{
  background:var(--panel-2);
  transform:translateY(-2px);
}

/* Section Nav */
#section-nav{
  display:flex;
  gap:8px;
  overflow-x:auto;
  padding:12px 22px;
  background:rgba(15,22,38,0.9);
  border-bottom:1px solid var(--border);
}

#section-nav::-webkit-scrollbar{
  height:7px;
}

#section-nav::-webkit-scrollbar-thumb{
  background:rgba(255,255,255,0.12);
  border-radius:999px;
}

.nav-btn{
  white-space:nowrap;
  border:none;
  border-radius:999px;
  padding:10px 16px;
  color:var(--text-dim);
  background:var(--panel);
  border:1px solid var(--border);
  transition:.25s ease;
}

.nav-btn:hover{
  color:var(--text);
  border-color:rgba(0,224,255,0.45);
  transform:translateY(-2px);
}

.nav-btn.active{
  color:#03131c;
  font-weight:700;
  border-color:transparent;
  background:linear-gradient(90deg,var(--accent),var(--accent2));
  box-shadow:0 8px 20px rgba(0,224,255,0.18);
}

/* Stage */
#stage{
  width:min(1200px, 100%);
  margin:0 auto;
  padding:32px 22px 90px;
  flex:1;
}

.section-title{
  margin-bottom:8px;
  font-size:1.9rem;
  line-height:1.1;
  background:linear-gradient(90deg,var(--accent),var(--accent2));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}

.section-sub{
  margin-bottom:26px;
  color:var(--text-dim);
  font-size:0.96rem;
  line-height:1.6;
}

/* Common Cards */
.card{
  position:relative;
  overflow:hidden;
  border-radius:var(--radius);
  padding:20px;
  background:var(--panel);
  border:1px solid var(--border);
  backdrop-filter:blur(10px);
  box-shadow:var(--shadow);
  transition:.25s ease;
}

.card:hover{
  transform:translateY(-4px);
  border-color:rgba(0,224,255,0.35);
  box-shadow:var(--shadow-glow);
}

.grid{
  display:grid;
  gap:18px;
}

.grid-4{
  grid-template-columns:repeat(auto-fill,minmax(210px,1fr));
}

.grid-3{
  grid-template-columns:repeat(auto-fill,minmax(260px,1fr));
}

/* Welcome */
.welcome-hero{
  text-align:center;
  padding:40px 0 10px;
}

.chip-grow{
  font-size:5rem;
  display:inline-block;
  animation:pulseGrow 3s ease-in-out infinite;
  filter:drop-shadow(0 0 20px rgba(0,224,255,0.22));
}

@keyframes pulseGrow{
  0%,100%{transform:scale(1);}
  50%{transform:scale(1.15);}
}

.evolve-row{
  margin-top:26px;
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  align-items:center;
  gap:10px;
  font-size:2rem;
}

.evolve-row span.arrow{
  color:var(--accent);
  font-size:1.2rem;
}

.evolve-item{
  opacity:0;
  animation:fadeUp .65s forwards;
}

@keyframes fadeUp{
  from{
    opacity:0;
    transform:translateY(14px);
  }
  to{
    opacity:1;
    transform:translateY(0);
  }
}

.hero-msg{
  margin-top:26px;
  color:var(--accent3);
  font-size:1.3rem;
  font-weight:700;
}

.start-btn{
  margin-top:30px;
  border:none;
  border-radius:999px;
  padding:14px 34px;
  background:linear-gradient(90deg,var(--accent),var(--accent2));
  color:#04101f;
  font-size:1rem;
  font-weight:700;
  box-shadow:0 10px 25px rgba(168,85,247,0.28);
  transition:.25s ease;
}

.start-btn:hover{
  transform:translateY(-3px) scale(1.03);
}

/* Timeline */
.timeline{
  position:relative;
  padding-left:26px;
  border-left:3px solid rgba(255,255,255,0.12);
}

.tl-item{
  position:relative;
  margin-bottom:26px;
  padding-left:16px;
  cursor:pointer;
}

.tl-item::before{
  content:"";
  position:absolute;
  left:-31px;
  top:4px;
  width:14px;
  height:14px;
  border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 12px rgba(0,224,255,0.9);
}

.tl-year{
  font-size:.8rem;
  font-weight:700;
  color:var(--accent3);
  margin-bottom:3px;
}

.tl-name{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:1.18rem;
  font-weight:700;
}

.tl-detail{
  display:none;
  margin-top:10px;
  padding:14px;
  border-radius:14px;
  line-height:1.6;
  font-size:.9rem;
  color:var(--text);
  background:rgba(255,255,255,0.04);
  border:1px solid var(--border);
}

.tl-item.open .tl-detail{
  display:block;
  animation:fadeUp .35s ease;
}

/* Zoom Section */
.zoom-stage{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:14px;
  margin:18px 0;
  text-align:center;
}

.zoom-level{
  font-size:3.2rem;
  opacity:.35;
  transition:.35s ease;
}

.zoom-level.active{
  opacity:1;
  transform:scale(1.25);
  text-shadow:0 0 18px rgba(0,224,255,0.4);
}

.zoom-label{
  min-height:24px;
  color:var(--text-dim);
  font-size:.9rem;
}

.zoom-controls{
  display:flex;
  gap:12px;
  flex-wrap:wrap;
  justify-content:center;
  margin-top:10px;
}

.zoom-controls button{
  padding:10px 18px;
  border-radius:12px;
  border:1px solid var(--border);
  background:var(--panel);
  color:var(--text);
  transition:.25s ease;
}

.zoom-controls button:hover{
  border-color:rgba(0,224,255,0.45);
  transform:translateY(-2px);
}

/* Chip Cards */
.chip-card .icon{
  font-size:2.3rem;
}

.chip-card .cat{
  margin-top:6px;
  color:var(--accent);
  font-size:.72rem;
  font-weight:700;
  text-transform:uppercase;
  letter-spacing:.08em;
}

.chip-card h4{
  margin:8px 0 8px;
  font-size:1rem;
}

.diff-dots{
  margin-top:10px;
  display:flex;
  gap:4px;
  font-size:.8rem;
}

.diff-dots span{
  opacity:.22;
}

.diff-dots span.filled{
  opacity:1;
  color:var(--accent3);
}

/* Modal */
#chip-modal{
  position:fixed;
  inset:0;
  z-index:200;
  display:flex;
  align-items:center;
  justify-content:center;
  background:rgba(0,0,0,0.65);
  backdrop-filter:blur(5px);
}

#chip-modal.hidden{
  display:none;
}

.modal-card{
  position:relative;
  width:min(92%, 700px);
  max-height:85vh;
  overflow-y:auto;
  padding:28px;
  border-radius:22px;
  background:linear-gradient(180deg, rgba(15,22,38,0.96), rgba(10,14,26,0.98));
  border:1px solid var(--border);
  box-shadow:0 20px 60px rgba(0,0,0,0.55);
  animation:fadeUp .25s ease;
}

#close-modal{
  position:absolute;
  top:14px;
  right:14px;
  border:none;
  border-radius:10px;
  padding:6px 12px;
  color:var(--text);
  background:var(--panel);
  border:1px solid var(--border);
}

.modal-content h2{
  margin-bottom:5px;
}

.modal-content .sub{
  margin-bottom:14px;
  color:var(--accent);
  font-size:.86rem;
}

.modal-block{
  margin:14px 0;
}

.modal-block h4{
  margin-bottom:6px;
  color:var(--accent3);
  font-size:.82rem;
  text-transform:uppercase;
  letter-spacing:.07em;
}

.modal-block p,
.modal-block li{
  line-height:1.65;
  color:var(--text);
  font-size:.93rem;
}

.modal-block ul{
  padding-left:18px;
}

.tag-list{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}

.tag{
  padding:5px 12px;
  border-radius:999px;
  font-size:.8rem;
  border:1px solid var(--border);
  background:var(--panel);
  transition:.2s ease;
  cursor:pointer;
}

.tag:hover{
  border-color:rgba(0,224,255,0.4);
  color:var(--accent);
}

/* Devices */
.device-card{
  text-align:center;
}

.device-card .icon{
  font-size:2.7rem;
  margin-bottom:8px;
}

.device-detail{
  margin-top:18px;
}

.device-chip-grid{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  justify-content:center;
  margin-top:12px;
}

.mini-chip{
  min-width:100px;
  padding:10px 14px;
  border-radius:12px;
  border:1px solid var(--border);
  background:var(--panel);
  text-align:center;
  transition:.22s ease;
  cursor:pointer;
}

.mini-chip:hover{
  transform:translateY(-3px);
  border-color:rgba(0,224,255,0.4);
}

/* Flow */
.flow-row{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  align-items:center;
  gap:10px;
  margin:28px 0;
}

.flow-node{
  min-width:110px;
  padding:16px 18px;
  text-align:center;
  border-radius:14px;
  border:1px solid var(--border);
  background:var(--panel);
  transition:.25s ease;
}

.flow-node.active{
  transform:scale(1.08);
  border-color:rgba(0,224,255,0.55);
  box-shadow:0 0 20px rgba(0,224,255,0.25);
}

.flow-arrow{
  color:var(--accent);
  font-size:1.4rem;
}

/* Factory */
.factory-steps{
  display:flex;
  flex-direction:column;
  gap:12px;
}

.factory-step{
  display:flex;
  align-items:flex-start;
  gap:16px;
  padding:14px 18px;
  border-radius:14px;
  border:1px solid var(--border);
  background:var(--panel);
  transition:.25s ease;
  cursor:pointer;
}

.factory-step:hover{
  border-color:rgba(0,224,255,0.35);
}

.factory-step.done{
  background:rgba(34,197,94,0.08);
  border-color:rgba(34,197,94,0.4);
}

.factory-step .num{
  flex-shrink:0;
  width:34px;
  height:34px;
  display:flex;
  align-items:center;
  justify-content:center;
  border-radius:50%;
  background:linear-gradient(180deg,var(--accent),#59c9ff);
  color:#04101f;
  font-weight:800;
}

.factory-detail{
  display:none;
  margin-top:6px;
  color:var(--text-dim);
  font-size:.88rem;
  line-height:1.6;
}

.factory-step.open .factory-detail{
  display:block;
}

/* Future Cards */
.future-card{
  border-left:3px solid var(--accent2);
}

.future-tag{
  display:inline-block;
  margin-bottom:8px;
  padding:4px 10px;
  border-radius:999px;
  background:rgba(168,85,247,0.18);
  color:#d5b4ff;
  font-size:.72rem;
}

/* Quiz */
.quiz-box{
  width:min(100%, 650px);
  margin:0 auto;
}

.quiz-q{
  margin-bottom:20px;
  font-size:1.14rem;
  line-height:1.5;
  font-weight:700;
}

.quiz-opt{
  display:block;
  width:100%;
  margin-bottom:10px;
  padding:14px 18px;
  text-align:left;
  border-radius:12px;
  border:1px solid var(--border);
  color:var(--text);
  background:var(--panel);
  transition:.22s ease;
}

.quiz-opt:hover{
  border-color:rgba(0,224,255,0.45);
  transform:translateY(-2px);
}

.quiz-opt.correct{
  background:rgba(34,197,94,0.15);
  border-color:rgba(34,197,94,0.55);
}

.quiz-opt.wrong{
  background:rgba(239,68,68,0.15);
  border-color:rgba(239,68,68,0.55);
}

.quiz-explain{
  display:none;
  margin-top:16px;
  padding:14px;
  border-radius:12px;
  line-height:1.6;
  font-size:.9rem;
  background:rgba(255,255,255,0.04);
  border:1px solid var(--border);
}

.quiz-nav{
  margin-top:20px;
  text-align:right;
}

.quiz-nav button{
  padding:10px 24px;
  border:none;
  border-radius:999px;
  background:linear-gradient(90deg,var(--accent),var(--accent2));
  color:#04101f;
  font-weight:800;
}

.quiz-score{
  margin-top:20px;
  text-align:center;
  font-size:1.45rem;
  font-weight:700;
}

/* Toast */
#toast{
  position:fixed;
  right:24px;
  bottom:24px;
  z-index:300;
  padding:14px 22px;
  border-radius:14px;
  border:1px solid rgba(0,224,255,0.35);
  background:rgba(8,12,22,0.96);
  color:var(--text);
  box-shadow:0 10px 30px rgba(0,0,0,0.45);
  transform:translateY(130%);
  transition:.35s ease;
}

#toast.show{
  transform:translateY(0);
}

/* Badges Panel */
#badges-panel{
  position:fixed;
  top:74px;
  right:20px;
  z-index:150;
  width:290px;
  padding:18px;
  border-radius:16px;
  border:1px solid var(--border);
  background:rgba(12,18,30,0.96);
  box-shadow:0 20px 40px rgba(0,0,0,0.5);
}

#badges-panel.hidden{
  display:none;
}

#badges-panel h3{
  display:flex;
  justify-content:space-between;
  align-items:center;
  margin-bottom:12px;
  font-size:1rem;
}

#badges-panel h3 button{
  color:var(--text-dim);
  background:none;
  border:none;
  font-size:1rem;
}

.badge-item{
  display:flex;
  gap:10px;
  align-items:flex-start;
  padding:9px 0;
  border-bottom:1px solid rgba(255,255,255,0.06);
  font-size:.84rem;
}

.badge-item.locked{
  opacity:.4;
}

/* Utility */
.hidden{
  display:none;
}

/* Responsive */
@media (max-width: 900px){
  #top-nav{
    flex-wrap:wrap;
  }

  .progress-wrap{
    order:3;
    width:100%;
    flex-basis:100%;
  }

  .nav-actions{
    margin-left:auto;
  }
}

@media (max-width: 640px){
  #stage{
    padding:24px 16px 80px;
  }

  #section-nav{
    padding:10px 14px;
  }

  #top-nav{
    padding:12px 14px;
  }

  #search-input{
    width:130px;
  }

  .section-title{
    font-size:1.55rem;
  }

  .chip-grow{
    font-size:4rem;
  }

  .hero-msg{
    font-size:1.08rem;
  }

  .grid-4{
    grid-template-columns:repeat(2,1fr);
  }

  .grid-3{
    grid-template-columns:1fr;
  }

  .flow-row{
    flex-direction:column;
  }

  .flow-arrow{
    transform:rotate(90deg);
  }

  #badges-panel{
    right:12px;
    left:12px;
    width:auto;
  }

  .modal-card{
    width:95%;
    padding:22px 18px;
  }
}

@media (max-width: 420px){
  .grid-4{
    grid-template-columns:1fr;
  }

  .nav-btn{
    padding:9px 12px;
    font-size:.82rem;
  }

  .start-btn{
    width:100%;
  }
}