/* ===== RESET / BASE ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%;overflow:hidden;font-family:'Rajdhani',sans-serif;color:#e8f4ff;background:#05060f}
body{
  background:
    radial-gradient(ellipse at top left,rgba(120,40,255,.25),transparent 60%),
    radial-gradient(ellipse at bottom right,rgba(0,200,255,.25),transparent 60%),
    linear-gradient(180deg,#05060f 0%, #0a0a1f 100%);
}
canvas#particles-bg{position:fixed;inset:0;z-index:0;pointer-events:none}
:root{
  --cyan:#00e5ff;
  --purple:#a855f7;
  --pink:#ff3ec9;
  --blue:#3b82f6;
  --bg-glass:rgba(20,25,55,0.35);
  --border-glow:rgba(0,229,255,0.35);
}

/* ===== UTIL ===== */
.glass{
  background:var(--bg-glass);
  backdrop-filter:blur(20px) saturate(160%);
  -webkit-backdrop-filter:blur(20px) saturate(160%);
  border:1px solid rgba(255,255,255,0.08);
  border-radius:18px;
  box-shadow:0 8px 40px rgba(0,0,0,.4), inset 0 1px 0 rgba(255,255,255,.05);
}
.glass-btn{
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.12);
  color:#e8f4ff;
  padding:8px 16px;
  border-radius:12px;
  font-family:'Rajdhani',sans-serif;
  font-weight:600;
  cursor:pointer;
  transition:all .25s ease;
  backdrop-filter:blur(10px);
}
.glass-btn:hover{background:rgba(0,229,255,.15);border-color:var(--cyan);box-shadow:0 0 20px rgba(0,229,255,.4)}
.neon-text{
  font-family:'Orbitron',sans-serif;
  background:linear-gradient(90deg,var(--cyan),var(--purple),var(--pink));
  -webkit-background-clip:text;background-clip:text;color:transparent;
  text-shadow:0 0 30px rgba(0,229,255,.3);
  letter-spacing:2px;
}
.neon-text.big{font-size:clamp(2rem,5vw,3.5rem)}
.muted{color:#8aa0c0;font-size:.95rem}

/* ===== TOP NAV ===== */
.topnav{
  position:fixed;top:18px;left:18px;right:18px;z-index:50;
  display:flex;justify-content:space-between;align-items:center;
  padding:12px 22px;
}
.logo{display:flex;align-items:center;gap:12px;font-family:'Orbitron',sans-serif;font-weight:700;font-size:1.1rem}
.logo-icon{font-size:1.5rem;color:var(--cyan);text-shadow:0 0 18px var(--cyan);animation:spin 8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.nav-actions{display:flex;gap:10px}

/* ===== SCREENS ===== */
.screen{
  position:fixed;inset:0;z-index:10;
  opacity:0;pointer-events:none;
  transition:opacity .6s ease, transform .6s ease;
  transform:scale(.98);
  overflow:auto;
}
.screen.active{opacity:1;pointer-events:auto;transform:scale(1)}

/* ===== LOGIN ===== */
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:90px 20px 40px}
.login-card{width:100%;max-width:440px;padding:40px 34px;position:relative;overflow:hidden}
.login-card::before{
  content:'';position:absolute;inset:-2px;border-radius:18px;
  background:conic-gradient(from 0deg,var(--cyan),var(--purple),var(--pink),var(--cyan));
  z-index:-1;filter:blur(20px);opacity:.4;animation:spin 6s linear infinite;
}
.login-header{text-align:center;margin-bottom:24px}
.orb{
  width:70px;height:70px;margin:0 auto 16px;border-radius:50%;
  background:radial-gradient(circle at 30% 30%,#fff,var(--cyan) 40%,var(--purple) 80%);
  box-shadow:0 0 40px var(--cyan), inset 0 0 20px rgba(255,255,255,.4);
  animation:pulse 3s ease-in-out infinite;
}
@keyframes pulse{50%{transform:scale(1.08);filter:hue-rotate(40deg)}}
.subtitle{color:#8aa0c0;margin-top:6px;font-size:.95rem;letter-spacing:1px}
.tab-bar{display:flex;gap:8px;margin-bottom:24px;background:rgba(0,0,0,.25);padding:5px;border-radius:12px}
.tab-btn{flex:1;background:transparent;border:none;color:#8aa0c0;padding:10px;border-radius:9px;font-family:'Rajdhani';font-weight:600;cursor:pointer;transition:.3s}
.tab-btn.active{background:linear-gradient(90deg,var(--cyan),var(--purple));color:#000}
.auth-form{display:none;flex-direction:column;gap:18px}
.auth-form.active{display:flex;animation:fadeUp .5s ease}
@keyframes fadeUp{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.input-group{position:relative}
.input-group input{
  width:100%;padding:16px 14px 8px;
  background:rgba(0,0,0,.3);border:1px solid rgba(255,255,255,.1);
  color:#fff;border-radius:10px;font-size:1rem;font-family:'Rajdhani';outline:none;
  transition:.3s;
}
.input-group input:focus{border-color:var(--cyan);box-shadow:0 0 18px rgba(0,229,255,.3)}
.input-group label{
  position:absolute;left:14px;top:14px;color:#8aa0c0;pointer-events:none;
  transition:.25s;font-size:.95rem;
}
.input-group input:focus + label,
.input-group input:not(:placeholder-shown) + label,
.input-group input:valid + label{top:4px;font-size:.7rem;color:var(--cyan)}

.cyber-btn{
  position:relative;padding:14px;border:none;border-radius:12px;cursor:pointer;
  background:linear-gradient(90deg,var(--cyan),var(--purple));
  color:#000;font-family:'Orbitron';font-weight:700;letter-spacing:2px;
  text-transform:uppercase;font-size:.9rem;
  transition:.3s;
}
.cyber-btn:hover{transform:translateY(-2px);box-shadow:0 10px 30px rgba(168,85,247,.5)}
.hint{text-align:center;color:#8aa0c0;font-size:.8rem;margin-top:8px}
.auth-msg{margin-top:14px;text-align:center;min-height:22px;font-weight:600}
.auth-msg.error{color:#ff5d8f}
.auth-msg.success{color:#7cffc0}

/* ===== CITY ===== */
#cityScreen{overflow:hidden}
#city3d-container{position:absolute;inset:0}
.city-overlay{position:absolute;inset:0;pointer-events:none;z-index:5}
.city-hud{
  position:absolute;top:90px;left:30px;padding:18px 22px;pointer-events:auto;
  max-width:330px;
}
.city-hud h2{font-size:1.3rem;margin-bottom:6px}
.city-hud p{color:#9bb;font-size:.85rem}
.time-toggle{
  position:absolute;top:90px;right:30px;width:48px;height:48px;
  display:flex;align-items:center;justify-content:center;font-size:1.4rem;
  pointer-events:auto;padding:0;
}
.building-tooltip{
  position:absolute;padding:12px 16px;pointer-events:none;opacity:0;
  transform:translate(-50%,-100%);transition:opacity .2s;min-width:180px;
}
.building-tooltip.show{opacity:1}
.building-tooltip h3{font-family:'Orbitron';color:var(--cyan);font-size:.95rem;margin-bottom:4px}
.building-tooltip p{font-size:.8rem;color:#bcd}

/* ===== MODULE / DASHBOARD ===== */
.back-btn{position:absolute;top:90px;left:30px;z-index:30}
.module-wrap,.dashboard-wrap{
  padding:130px 40px 40px;max-width:1200px;margin:0 auto;
}
.module-wrap > h1{margin-bottom:8px}
.module-wrap > p{margin-bottom:30px}

.dashboard-wrap{display:grid;grid-template-columns:320px 1fr;gap:24px}
.profile-card{padding:30px;text-align:center}
.avatar-ring{
  width:120px;height:120px;border-radius:50%;margin:0 auto 16px;
  background:conic-gradient(from 0deg,var(--cyan),var(--purple),var(--pink),var(--cyan));
  padding:3px;animation:spin 10s linear infinite;
}
.avatar{
  width:100%;height:100%;border-radius:50%;
  background:linear-gradient(135deg,#1a1f3a,#0a0a1f);
  display:flex;align-items:center;justify-content:center;
  font-family:'Orbitron';font-size:3rem;color:var(--cyan);
  text-shadow:0 0 18px var(--cyan);
}
.profile-card h2{font-family:'Orbitron';font-size:1.3rem;margin-bottom:4px}
.stats-row{display:flex;justify-content:space-around;margin-top:20px;padding-top:20px;border-top:1px solid rgba(255,255,255,.08)}
.stat{display:flex;flex-direction:column;align-items:center}
.stat-val{font-family:'Orbitron';font-size:1.6rem;color:var(--cyan);text-shadow:0 0 12px var(--cyan)}
.stat-lbl{font-size:.75rem;color:#8aa0c0;text-transform:uppercase;letter-spacing:1px}

.results-panel,.achievements{padding:26px;grid-column:2}
.results-panel h3,.achievements h3{margin-bottom:18px;font-size:1.1rem}
.results-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:14px}
.result-card{
  background:rgba(0,0,0,.25);border:1px solid rgba(255,255,255,.08);
  padding:18px;border-radius:14px;position:relative;overflow:hidden;
}
.result-card .subj{font-family:'Orbitron';font-size:.85rem;color:#bcd;letter-spacing:1px}
.result-card .grade{font-family:'Orbitron';font-size:2.4rem;font-weight:700;margin-top:8px;
  background:linear-gradient(90deg,var(--cyan),var(--purple));-webkit-background-clip:text;background-clip:text;color:transparent}
.result-card .bar{height:6px;background:rgba(255,255,255,.08);border-radius:3px;margin-top:10px;overflow:hidden}
.result-card .bar span{display:block;height:100%;background:linear-gradient(90deg,var(--cyan),var(--purple));width:0;transition:width 1.2s ease}

.achievements{grid-column:2}
.ach-item{display:flex;align-items:center;gap:12px;padding:12px;border-radius:12px;background:rgba(0,0,0,.2);margin-bottom:10px;animation:fadeUp .6s ease}
.ach-icon{font-size:1.6rem;width:46px;height:46px;display:flex;align-items:center;justify-content:center;border-radius:50%;background:linear-gradient(135deg,var(--cyan),var(--purple))}
.ach-text strong{display:block;font-family:'Orbitron';font-size:.9rem}
.ach-text span{font-size:.8rem;color:#8aa0c0}

/* Leaderboard */
.leaderboard{padding:26px;max-width:800px}
.lb-row{display:grid;grid-template-columns:60px 1fr 100px 100px;gap:14px;align-items:center;padding:12px;border-radius:10px;margin-bottom:6px;transition:.25s}
.lb-row:hover{background:rgba(0,229,255,.06)}
.lb-row.head{font-family:'Orbitron';color:var(--cyan);font-size:.8rem;letter-spacing:1px;border-bottom:1px solid rgba(255,255,255,.1)}
.lb-rank{font-family:'Orbitron';font-size:1.2rem;color:var(--cyan)}
.lb-rank.gold{color:gold}.lb-rank.silver{color:silver}.lb-rank.bronze{color:#cd7f32}

/* Course grid */
.course-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px}
.course-card{padding:24px}
.course-card h3{font-family:'Orbitron';color:var(--cyan);margin-bottom:6px}
.course-card p{color:#9ab;font-size:.85rem;margin-bottom:14px}
.progress{height:8px;background:rgba(255,255,255,.08);border-radius:4px;overflow:hidden}
.progress span{display:block;height:100%;background:linear-gradient(90deg,var(--cyan),var(--purple));box-shadow:0 0 14px var(--cyan)}

.book-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:18px}
.book-card{padding:20px;border-radius:14px;background:rgba(0,0,0,.25);border:1px solid rgba(255,255,255,.08);transition:.3s;cursor:pointer}
.book-card:hover{transform:translateY(-4px);border-color:var(--cyan);box-shadow:0 10px 30px rgba(0,229,255,.2)}
.book-card .ico{font-size:2rem;margin-bottom:10px}
.book-card h4{font-family:'Orbitron';font-size:.95rem;color:#fff;margin-bottom:4px}
.book-card p{color:#8aa0c0;font-size:.8rem}

/* ===== AI ASSISTANT ===== */
.ai-bubble{
  position:fixed;bottom:24px;right:24px;width:64px;height:64px;border-radius:50%;
  z-index:100;cursor:pointer;
  background:radial-gradient(circle at 30% 30%,#fff,var(--cyan) 30%,var(--purple) 80%);
  box-shadow:0 0 32px var(--cyan),0 10px 30px rgba(0,0,0,.5);
  display:flex;align-items:center;justify-content:center;
  animation:float 4s ease-in-out infinite;
  transition:transform .3s;
}
.ai-bubble:hover{transform:scale(1.1)}
@keyframes float{50%{transform:translateY(-8px)}}
.ai-orb{
  width:28px;height:28px;border-radius:50%;
  background:radial-gradient(circle at 30% 30%,#fff,transparent 70%);
  animation:pulse 2s ease-in-out infinite;
}
.ai-orb.small{width:14px;height:14px;background:radial-gradient(circle at 30% 30%,#fff,var(--cyan) 50%,transparent)}

.ai-panel{
  position:fixed;bottom:100px;right:24px;width:360px;max-width:calc(100vw - 48px);
  height:520px;max-height:75vh;z-index:99;
  display:flex;flex-direction:column;
  opacity:0;pointer-events:none;transform:translateY(20px) scale(.95);
  transition:.35s cubic-bezier(.2,.8,.2,1);
}
.ai-panel.open{opacity:1;pointer-events:auto;transform:none}
.ai-header{display:flex;justify-content:space-between;align-items:center;padding:16px 18px;border-bottom:1px solid rgba(255,255,255,.08)}
.ai-title{display:flex;gap:10px;align-items:center}
.ai-title h3{font-family:'Orbitron';font-size:1rem;color:var(--cyan)}
.ai-status{font-size:.7rem;color:#7cffc0;display:block;margin-top:2px}
.ai-close{background:transparent;border:none;color:#8aa0c0;font-size:1.1rem;cursor:pointer;transition:.2s}
.ai-close:hover{color:#fff}
.ai-messages{flex:1;overflow-y:auto;padding:14px;display:flex;flex-direction:column;gap:10px}
.ai-messages::-webkit-scrollbar{width:6px}
.ai-messages::-webkit-scrollbar-thumb{background:rgba(0,229,255,.3);border-radius:3px}
.msg{padding:10px 14px;border-radius:14px;max-width:85%;font-size:.9rem;line-height:1.4;animation:fadeUp .3s}
.msg.bot{background:rgba(0,229,255,.12);border:1px solid rgba(0,229,255,.2);align-self:flex-start;border-bottom-left-radius:4px}
.msg.user{background:linear-gradient(135deg,var(--purple),var(--blue));align-self:flex-end;color:#fff;border-bottom-right-radius:4px}
.msg.typing{display:flex;gap:4px;align-items:center}
.msg.typing span{width:6px;height:6px;border-radius:50%;background:var(--cyan);animation:blink 1.2s infinite}
.msg.typing span:nth-child(2){animation-delay:.2s}
.msg.typing span:nth-child(3){animation-delay:.4s}
@keyframes blink{0%,80%,100%{opacity:.3}40%{opacity:1}}
.ai-input-row{display:flex;padding:12px;gap:8px;border-top:1px solid rgba(255,255,255,.08)}
.ai-input-row input{flex:1;padding:10px 14px;border-radius:20px;border:1px solid rgba(255,255,255,.12);background:rgba(0,0,0,.3);color:#fff;outline:none;font-family:'Rajdhani'}
.ai-input-row input:focus{border-color:var(--cyan)}
.ai-input-row button{width:40px;height:40px;border-radius:50%;border:none;background:linear-gradient(135deg,var(--cyan),var(--purple));color:#000;cursor:pointer;font-weight:700;transition:.2s}
.ai-input-row button:hover{transform:scale(1.08);box-shadow:0 0 18px var(--cyan)}

/* TRANSITION */
.transition{
  position:fixed;inset:0;z-index:200;pointer-events:none;
  background:radial-gradient(circle at center,var(--cyan),var(--purple),#000);
  clip-path:circle(0% at 50% 50%);
  transition:clip-path .8s cubic-bezier(.7,0,.3,1);
}
.transition.active{clip-path:circle(150% at 50% 50%);pointer-events:auto}

/* RTL */
html[dir="rtl"] .topnav{flex-direction:row-reverse}
html[dir="rtl"] .back-btn{left:auto;right:30px}
html[dir="rtl"] .ai-bubble,html[dir="rtl"] .ai-panel{right:auto;left:24px}
html[dir="rtl"] .time-toggle{right:auto;left:30px}
html[dir="rtl"] .city-hud{left:auto;right:30px}

/* RESPONSIVE */
@media (max-width:820px){
  .topnav{padding:10px 14px;top:10px;left:10px;right:10px}
  .logo-text{display:none}
  .dashboard-wrap{grid-template-columns:1fr;padding:120px 16px 80px}
  .results-panel,.achievements{grid-column:1}
  .module-wrap{padding:120px 16px 80px}
  .city-hud{top:80px;left:14px;right:14px;max-width:none}
  .ai-panel{right:12px;left:12px;width:auto;bottom:90px}
  .back-btn{top:80px;left:14px}
  .lb-row{grid-template-columns:50px 1fr 70px}
  .lb-row .lb-school{display:none}
}