:root{
  --void:#05060c; --stone-deep:#0b0e1a; --stone:#141828;
  --blue-neon:#4fd8ff; --violet-neon:#a855f7; --gold-relic:#d9b46a; --ok:#4ee08a;
  --ink-hi:#eef1fb; --ink-lo:#8b93b3; --ink-faint:#525a78;
  --line:rgba(143,159,214,0.14);
  --radius-m:14px; --radius-l:24px;
  --ease:cubic-bezier(.16,.8,.28,1);
  --font-display:'Cinzel',serif; --font-ui:'Orbitron',sans-serif; --font-body:'Rajdhani',sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
body{background:var(--void);color:var(--ink-hi);font-family:var(--font-body);font-size:17px;-webkit-font-smoothing:antialiased;}
h1,h2,h3{font-family:var(--font-display);font-weight:700;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit;}
img,svg{display:block;max-width:100%;}
@media (prefers-reduced-motion: reduce){*,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important;}}
a:focus-visible,button:focus-visible{outline:2px solid var(--blue-neon);outline-offset:2px;}

#bg{position:fixed;inset:0;z-index:0;pointer-events:none;
  background:radial-gradient(ellipse 60% 40% at 80% 0%, rgba(168,85,247,.10), transparent 60%),
             radial-gradient(ellipse 50% 40% at 10% 100%, rgba(79,216,255,.10), transparent 60%), var(--void);}

.container{width:min(1080px,100% - 40px);margin-inline:auto;position:relative;z-index:1;}

header.top-nav{position:sticky;top:0;z-index:10;padding:16px 0;background:rgba(8,10,20,.75);backdrop-filter:blur(14px);border-bottom:1px solid var(--line);}
.nav-row{display:flex;align-items:center;gap:20px;flex-wrap:wrap;}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--font-display);font-size:1.05rem;}
.brand svg{width:30px;height:30px;}
.nav-links{display:flex;gap:4px;margin-left:auto;flex-wrap:wrap;}
.nav-links a{font-family:var(--font-ui);font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;padding:8px 12px;border-radius:6px;color:var(--ink-lo);transition:color .2s ease,background .2s ease;}
.nav-links a:hover{color:var(--ink-hi);background:rgba(79,216,255,.08);}
.nav-links a.active{color:var(--blue-neon);}

main{padding:56px 0 90px;}
.page-head{text-align:center;margin-bottom:20px;}
.eyebrow{font-family:var(--font-ui);font-size:.72rem;letter-spacing:.32em;text-transform:uppercase;color:var(--blue-neon);}
.page-head h1{font-size:clamp(2rem,4.5vw,3rem);margin-top:14px;text-transform:uppercase;}
.page-head p{color:var(--ink-lo);margin-top:12px;}

.progress-summary{
  display:flex;align-items:center;justify-content:center;gap:14px;margin:26px auto 50px;
  font-family:var(--font-ui);font-size:.72rem;letter-spacing:.1em;color:var(--ink-lo);text-transform:uppercase;
}
.progress-summary .bar{width:180px;height:8px;border-radius:5px;background:rgba(255,255,255,.06);border:1px solid var(--line);overflow:hidden;}
.progress-summary .fill{height:100%;width:0%;background:linear-gradient(90deg,var(--blue-neon),var(--violet-neon));transition:width 1s var(--ease);}

.reveal{opacity:0;transform:translateY(24px);transition:opacity .6s var(--ease),transform .6s var(--ease);}
.reveal.in{opacity:1;transform:translateY(0);}

.ach-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(270px,1fr));gap:22px;}
.ach-card{
  position:relative;padding:28px 24px;border-radius:var(--radius-l);overflow:hidden;
  background:linear-gradient(180deg,rgba(20,24,40,.55),rgba(8,10,20,.7));
  border:1px solid var(--line);transition:transform .35s var(--ease),border-color .35s ease,box-shadow .35s ease;
}
.ach-card:hover{transform:translateY(-6px);border-color:rgba(79,216,255,.4);box-shadow:0 26px 50px -22px rgba(79,216,255,.25);}
.ach-card.locked{filter:grayscale(.6);opacity:.72;}
.ach-card.locked:hover{filter:grayscale(.3);opacity:.9;}
.ach-card.claimable{border-color:rgba(217,180,106,.5);box-shadow:0 0 30px -10px rgba(217,180,106,.4);}
.ach-card.claimable::after{
  content:'Ready to claim';position:absolute;top:14px;right:14px;font-family:var(--font-ui);font-size:.58rem;
  letter-spacing:.1em;text-transform:uppercase;color:var(--gold-relic);border:1px solid rgba(217,180,106,.4);
  padding:4px 8px;border-radius:20px;animation:claim-blink 1.6s ease-in-out infinite;
}
@keyframes claim-blink{0%,100%{opacity:1;}50%{opacity:.4;}}

.ach-icon{
  width:56px;height:56px;border-radius:14px;display:flex;align-items:center;justify-content:center;margin-bottom:18px;
  background:radial-gradient(circle,rgba(79,216,255,.18),rgba(168,85,247,.08));border:1px solid var(--line);
  position:relative;
}
.ach-card.unlocked .ach-icon{background:radial-gradient(circle,rgba(78,224,138,.22),rgba(78,224,138,.06));border-color:rgba(78,224,138,.4);}
.ach-icon svg{width:28px;height:28px;stroke:var(--blue-neon);}
.ach-card.unlocked .ach-icon svg{stroke:var(--ok);}
.ach-card.locked .ach-icon svg{stroke:var(--ink-faint);}

.ach-name{font-size:1.2rem;margin-bottom:6px;}
.ach-desc{color:var(--ink-lo);font-size:.94rem;margin-bottom:18px;line-height:1.5;}

.ach-progress-row{display:flex;align-items:center;justify-content:space-between;font-family:var(--font-ui);font-size:.65rem;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-faint);margin-bottom:6px;}
.ach-track{height:7px;border-radius:5px;background:rgba(255,255,255,.06);border:1px solid var(--line);overflow:hidden;}
.ach-fill{height:100%;width:0%;border-radius:5px;background:linear-gradient(90deg,var(--blue-neon),var(--violet-neon));transition:width 1.1s var(--ease);}
.ach-card.unlocked .ach-fill{background:linear-gradient(90deg,var(--ok),#9ef7c4);}

.ach-status{
  margin-top:16px;display:inline-flex;align-items:center;gap:6px;font-family:var(--font-ui);
  font-size:.65rem;letter-spacing:.1em;text-transform:uppercase;color:var(--ok);
}
.ach-status svg{width:13px;height:13px;stroke:var(--ok);}

.claim-btn{
  margin-top:16px;width:100%;padding:10px;border-radius:8px;font-family:var(--font-ui);font-size:.68rem;
  letter-spacing:.14em;text-transform:uppercase;color:var(--void);
  background:linear-gradient(120deg,var(--gold-relic),#ffe3a3);font-weight:700;
  transition:transform .2s ease,box-shadow .2s ease;
}
.claim-btn:hover{transform:translateY(-2px);box-shadow:0 10px 24px -8px rgba(217,180,106,.5);}

/* unlock burst effect */
.unlock-burst{position:absolute;inset:0;pointer-events:none;opacity:0;}
.ach-card.bursting .unlock-burst{opacity:1;}
.unlock-burst::before{
  content:'';position:absolute;inset:0;border-radius:inherit;
  background:radial-gradient(circle at 50% 30%, rgba(255,235,190,.5), transparent 60%);
  animation:burst-flash .8s ease forwards;
}
@keyframes burst-flash{0%{opacity:0;transform:scale(.6);}30%{opacity:1;}100%{opacity:0;transform:scale(1.4);}}
.checkmark-pop{
  position:absolute;top:14px;right:14px;width:30px;height:30px;border-radius:50%;
  background:var(--ok);display:flex;align-items:center;justify-content:center;
  transform:scale(0);opacity:0;
}
.ach-card.bursting .checkmark-pop{animation:check-pop .5s var(--ease) forwards .3s;}
@keyframes check-pop{to{transform:scale(1);opacity:1;}}
.checkmark-pop svg{width:16px;height:16px;stroke:var(--void);stroke-width:3;}

footer{padding:40px 0;text-align:center;color:var(--ink-faint);font-size:.85rem;border-top:1px solid var(--line);margin-top:40px;}

/* ============== RESPONSIVE ============== */
@media (max-width:760px){
  main{padding:40px 0 70px;}
  .page-head{margin-bottom:14px;}
  .page-head p{font-size:.92rem;padding:0 8px;}
  .progress-summary{flex-direction:column;gap:10px;margin:20px auto 36px;}
  .ach-grid{gap:16px;grid-template-columns:1fr;}
  .ach-card{padding:22px 20px;}
  .nav-row{gap:12px;}
  .nav-links{gap:2px;width:100%;justify-content:flex-start;order:3;}
  .nav-links a{padding:7px 9px;font-size:.62rem;}
}

@media (max-width:480px){
  body{font-size:15.5px;}
  .container{width:calc(100% - 28px);}
  .brand{font-size:.92rem;}
  .brand svg{width:26px;height:26px;}
  .page-head h1{font-size:1.7rem;}
  .eyebrow{font-size:.62rem;letter-spacing:.24em;}
  .progress-summary .bar{width:140px;}
  .ach-card{padding:20px 16px;}
  .ach-icon{width:48px;height:48px;margin-bottom:14px;}
  .ach-icon svg{width:24px;height:24px;}
  .ach-name{font-size:1.08rem;}
  .ach-desc{font-size:.88rem;margin-bottom:14px;}
  .claim-btn{font-size:.62rem;padding:9px;}
}