/* ===== ASTRONOMIND — Shared Stylesheet ===== */
@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;600;700;800&family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;1,9..40,400&display=swap');

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#030B1A;
  --bg2:#060F24;
  --bg3:#0C1A35;
  --cyan:#38BDF8;
  --cyan-dark:#0EA5E9;
  --indigo:#818CF8;
  --gold:#F59E0B;
  --text:#F1F5F9;
  --muted:#94A3B8;
  --subtle:#64748B;
  --card:rgba(10,22,44,0.80);
  --card2:rgba(6,15,36,0.95);
  --border:rgba(56,189,248,0.14);
  --border2:rgba(129,140,248,0.18);
  --border3:rgba(241,245,249,0.08);
  --radius:12px;
  --radius-lg:18px;
  --radius-xl:24px;
}
html{scroll-behavior:smooth}
body{
  font-family:'DM Sans',sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.65;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}

/* ── Stars BG ── */
#stars-bg{
  position:fixed;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(ellipse 80% 50% at 70% -10%, rgba(56,189,248,0.07) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 10% 80%, rgba(129,140,248,0.07) 0%, transparent 55%),
    radial-gradient(ellipse 50% 30% at 50% 50%, rgba(245,158,11,0.03) 0%, transparent 60%),
    var(--bg);
}
#stars-bg::before{
  content:'';position:absolute;inset:0;
  background-image:
    radial-gradient(1px 1px at 10% 15%, rgba(255,255,255,0.7) 0%, transparent 100%),
    radial-gradient(1px 1px at 25% 40%, rgba(255,255,255,0.5) 0%, transparent 100%),
    radial-gradient(1.5px 1.5px at 40% 8%, rgba(255,255,255,0.6) 0%, transparent 100%),
    radial-gradient(1px 1px at 55% 70%, rgba(255,255,255,0.4) 0%, transparent 100%),
    radial-gradient(1px 1px at 70% 25%, rgba(255,255,255,0.5) 0%, transparent 100%),
    radial-gradient(1.5px 1.5px at 82% 55%, rgba(255,255,255,0.6) 0%, transparent 100%),
    radial-gradient(1px 1px at 90% 10%, rgba(255,255,255,0.5) 0%, transparent 100%),
    radial-gradient(1px 1px at 5% 90%, rgba(255,255,255,0.4) 0%, transparent 100%),
    radial-gradient(1px 1px at 35% 85%, rgba(255,255,255,0.3) 0%, transparent 100%),
    radial-gradient(1px 1px at 65% 92%, rgba(255,255,255,0.4) 0%, transparent 100%),
    radial-gradient(1px 1px at 78% 80%, rgba(255,255,255,0.3) 0%, transparent 100%),
    radial-gradient(1.5px 1.5px at 15% 60%, rgba(255,255,255,0.5) 0%, transparent 100%),
    radial-gradient(1px 1px at 48% 30%, rgba(255,255,255,0.4) 0%, transparent 100%),
    radial-gradient(1px 1px at 92% 45%, rgba(255,255,255,0.3) 0%, transparent 100%),
    radial-gradient(1px 1px at 20% 20%, rgba(255,255,255,0.6) 0%, transparent 100%),
    radial-gradient(1px 1px at 60% 50%, rgba(255,255,255,0.3) 0%, transparent 100%);
}

/* ── Layout ── */
.container{max-width:1140px;margin:0 auto;padding:0 24px;position:relative;z-index:1;}
section{padding:100px 0;position:relative;z-index:1;}

/* ── Nav ── */
nav{
  position:fixed;top:0;left:0;right:0;z-index:200;
  backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);
  background:rgba(3,11,26,0.88);
  border-bottom:1px solid var(--border);
}
.nav-inner{
  display:flex;align-items:center;gap:8px;
  max-width:1140px;margin:0 auto;padding:0 24px;height:66px;
}
.nav-logo{
  font-family:'Syne',sans-serif;font-weight:800;font-size:1.25rem;
  color:var(--text);text-decoration:none;display:flex;align-items:center;gap:10px;
  letter-spacing:-0.02em;flex-shrink:0;margin-right:16px;
}
.nav-logo .logo-icon{
  width:32px;height:32px;border-radius:8px;
  background:linear-gradient(135deg,var(--cyan),var(--indigo));
  display:flex;align-items:center;justify-content:center;
  font-size:1rem;
}
.nav-logo span{color:var(--cyan);}
.nav-links{display:flex;gap:4px;list-style:none;}
.nav-links a{
  padding:6px 14px;border-radius:8px;
  color:var(--muted);text-decoration:none;font-size:0.875rem;transition:all .2s;
}
.nav-links a:hover,.nav-links a.active{color:var(--text);background:rgba(255,255,255,0.06);}
.nav-spacer{flex:1;}
.nav-actions{display:flex;gap:10px;align-items:center;}
.btn-ghost{
  padding:8px 18px;border:1px solid var(--border3);border-radius:8px;
  background:transparent;color:var(--text);cursor:pointer;font-size:0.875rem;
  font-family:'DM Sans',sans-serif;text-decoration:none;transition:all .2s;
  white-space:nowrap;
}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan);}
.btn-primary{
  padding:8px 18px;border-radius:8px;
  background:var(--cyan);color:#030B1A;cursor:pointer;font-size:0.875rem;
  font-family:'DM Sans',sans-serif;font-weight:600;text-decoration:none;
  border:none;transition:all .2s;white-space:nowrap;
  box-shadow:0 0 20px rgba(56,189,248,0.3);
}
.btn-primary:hover{background:#7DD3FC;box-shadow:0 0 30px rgba(56,189,248,0.5);}
.nav-mobile-toggle{display:none;background:none;border:1px solid var(--border3);border-radius:8px;padding:6px 8px;color:var(--text);cursor:pointer;font-size:1.2rem;}

/* ── Buttons ── */
.btn-lg{
  display:inline-flex;align-items:center;gap:8px;
  padding:14px 30px;border-radius:12px;font-size:1rem;
  font-family:'DM Sans',sans-serif;font-weight:500;text-decoration:none;
  transition:all .25s;cursor:pointer;border:none;
}
.btn-lg.cyan{
  background:var(--cyan);color:#030B1A;font-weight:600;
  box-shadow:0 0 30px rgba(56,189,248,0.35);
}
.btn-lg.cyan:hover{background:#7DD3FC;transform:translateY(-2px);box-shadow:0 0 45px rgba(56,189,248,0.55);}
.btn-lg.outline{
  background:transparent;color:var(--text);
  border:1px solid var(--border3);
}
.btn-lg.outline:hover{border-color:var(--cyan);color:var(--cyan);}

/* ── Typography ── */
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:100px;
  background:rgba(56,189,248,0.08);border:1px solid rgba(56,189,248,0.25);
  font-size:0.8rem;color:var(--cyan);letter-spacing:0.08em;text-transform:uppercase;
  font-weight:500;margin-bottom:20px;
}
.eyebrow-indigo{background:rgba(129,140,248,0.08);border-color:rgba(129,140,248,0.25);color:var(--indigo);}
.eyebrow-gold{background:rgba(245,158,11,0.08);border-color:rgba(245,158,11,0.25);color:var(--gold);}
.section-title{
  font-family:'Syne',sans-serif;font-weight:800;
  font-size:clamp(2rem,3.5vw,2.8rem);line-height:1.15;
  letter-spacing:-0.03em;margin-bottom:16px;
}
.section-sub{
  color:var(--muted);font-size:1.05rem;line-height:1.7;
  max-width:560px;
}
.text-center{text-align:center;}
.text-center .section-sub{margin:0 auto;}
.accent-cyan{color:var(--cyan);}
.accent-indigo{color:var(--indigo);}
.accent-gold{color:var(--gold);}

/* ── Cards ── */
.glass-card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
  padding:28px;
  transition:border-color .3s,transform .3s;
}
.glass-card:hover{border-color:rgba(56,189,248,0.3);transform:translateY(-3px);}

/* ── Divider ── */
.divider{border:none;border-top:1px solid var(--border3);margin:0;}

/* ── Category pills ── */
.cat-pill{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 14px;border-radius:100px;font-size:0.8rem;font-weight:500;
  border:1px solid transparent;cursor:pointer;transition:all .2s;
  font-family:'DM Sans',sans-serif;background:var(--bg3);
  color:var(--muted);border-color:var(--border3);
}
.cat-pill:hover,.cat-pill.active{color:var(--cyan);border-color:rgba(56,189,248,0.35);background:rgba(56,189,248,0.08);}
.cat-pill.quiz.active{color:#38BDF8;border-color:rgba(56,189,248,0.35);background:rgba(56,189,248,0.08);}
.cat-pill.puzzle.active{color:#818CF8;border-color:rgba(129,140,248,0.35);background:rgba(129,140,248,0.08);}
.cat-pill.riddle.active{color:#F59E0B;border-color:rgba(245,158,11,0.35);background:rgba(245,158,11,0.08);}
.cat-pill.game.active{color:#4ADE80;border-color:rgba(74,222,128,0.35);background:rgba(74,222,128,0.08);}

/* ── Footer ── */
footer{
  border-top:1px solid var(--border3);
  padding:60px 0 36px;position:relative;z-index:1;
}
.footer-grid{display:grid;grid-template-columns:1.8fr 1fr 1fr 1fr;gap:48px;margin-bottom:48px;}
.footer-brand .nav-logo{font-size:1.1rem;margin-bottom:14px;display:inline-flex;}
.footer-brand p{color:var(--muted);font-size:0.875rem;line-height:1.7;max-width:240px;margin-bottom:20px;}
.social-row{display:flex;gap:10px;}
.social-btn{
  width:36px;height:36px;border-radius:8px;
  border:1px solid var(--border3);background:transparent;
  display:flex;align-items:center;justify-content:center;
  color:var(--muted);font-size:0.9rem;text-decoration:none;transition:all .2s;
}
.social-btn:hover{border-color:var(--cyan);color:var(--cyan);}
.footer-col h4{
  font-family:'Syne',sans-serif;font-weight:700;font-size:0.85rem;
  color:var(--text);margin-bottom:16px;letter-spacing:0.04em;text-transform:uppercase;
}
.footer-col ul{list-style:none;}
.footer-col ul li{margin-bottom:10px;}
.footer-col ul a{color:var(--muted);text-decoration:none;font-size:0.875rem;transition:color .2s;}
.footer-col ul a:hover{color:var(--cyan);}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;
  padding-top:24px;border-top:1px solid var(--border3);
  font-size:0.8rem;color:var(--subtle);
}
.footer-bottom a{color:var(--subtle);text-decoration:none;transition:color .2s;}
.footer-bottom a:hover{color:var(--muted);}
.footer-bottom-links{display:flex;gap:24px;}

/* ── Animations ── */
@keyframes fadeUp{from{opacity:0;transform:translateY(30px);}to{opacity:1;transform:translateY(0);}}
@keyframes fadeIn{from{opacity:0;}to{opacity:1;}}
@keyframes float{0%,100%{transform:translateY(0);}50%{transform:translateY(-10px);}}
@keyframes glow-pulse{0%,100%{box-shadow:0 0 20px rgba(56,189,248,0.2);}50%{box-shadow:0 0 40px rgba(56,189,248,0.5);}}
@keyframes spin-slow{from{transform:rotate(0deg);}to{transform:rotate(360deg);}}
.anim-up{animation:fadeUp .7s ease both;}
.anim-up-1{animation:fadeUp .7s ease .1s both;}
.anim-up-2{animation:fadeUp .7s ease .2s both;}
.anim-up-3{animation:fadeUp .7s ease .3s both;}
.anim-up-4{animation:fadeUp .7s ease .4s both;}
.float{animation:float 4s ease-in-out infinite;}

/* ── Responsive ── */
@media(max-width:900px){
  .nav-links,.nav-actions .btn-ghost{display:none;}
  .nav-mobile-toggle{display:block;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media(max-width:640px){
  section{padding:72px 0;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;gap:12px;text-align:center;}
}

/* ── FAQ Accordion ── */
.faq-item{
  border:1px solid var(--border3);border-radius:var(--radius);
  overflow:hidden;margin-bottom:10px;transition:border-color .25s;
}
.faq-item:hover,.faq-item.open{border-color:var(--border);}
.faq-q{
  display:flex;justify-content:space-between;align-items:center;
  padding:20px 24px;cursor:pointer;
  font-family:'Syne',sans-serif;font-weight:600;font-size:0.97rem;
  background:var(--card);gap:16px;
}
.faq-icon{
  width:28px;height:28px;border-radius:50%;
  border:1px solid var(--border3);
  display:flex;align-items:center;justify-content:center;
  font-size:1.1rem;flex-shrink:0;color:var(--muted);
  transition:all .25s;
}
.faq-item.open .faq-icon{transform:rotate(45deg);border-color:var(--cyan);color:var(--cyan);}
.faq-a{
  max-height:0;overflow:hidden;transition:max-height .35s ease,padding .35s ease;
  background:rgba(6,15,36,0.5);
  padding:0 24px;color:var(--muted);font-size:0.9rem;line-height:1.7;
}
.faq-item.open .faq-a{max-height:300px;padding:16px 24px 20px;}

/* ── Toast notification ── */
.toast{
  position:fixed;bottom:28px;right:28px;z-index:999;
  background:var(--bg3);border:1px solid var(--border);border-radius:12px;
  padding:14px 20px;display:flex;align-items:center;gap:12px;
  font-size:0.875rem;box-shadow:0 8px 32px rgba(0,0,0,0.4);
  transform:translateY(100px);opacity:0;transition:all .4s cubic-bezier(.175,.885,.32,1.275);
  pointer-events:none;
}
.toast.show{transform:translateY(0);opacity:1;}
.toast-icon{font-size:1.1rem;}