:root{
  --bg:#0b0d0f;
  --card:#0f1113;
  --muted:#9aa2a6;
  --accent:#d4af37; /* gold */
  --teal:#2dd4bf;
  --glass: rgba(255,255,255,0.04);
  --max-width:1100px;
  color-scheme: dark;
}
*{box-sizing:border-box}
html,body{height:100%;margin:0;background:linear-gradient(180deg,var(--bg),#050607);font-family:Inter,system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial; color:#e6eef1;-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none}
header{position:sticky;top:0;background:linear-gradient(180deg,rgba(11,13,15,0.9),rgba(11,13,15,0.6));backdrop-filter:blur(6px);border-bottom:1px solid rgba(255,255,255,0.02);z-index:40}
.container{max-width:var(--max-width);margin:0 auto;padding:28px}
.nav{display:flex;align-items:center;gap:18px}
.brand{font-weight:700;font-size:18px;letter-spacing:0.6px;display:flex;align-items:center;gap:12px}
.brand .logo{width:36px;height:36px;border-radius:8px;background:linear-gradient(135deg,var(--accent),var(--teal));display:inline-flex;align-items:center;justify-content:center;color:#071018;font-weight:800}
nav ul{display:flex;gap:18px;list-style:none;margin:0;padding:0}
nav ul li{font-weight:600;color:var(--muted)}
.hero{display:grid;grid-template-columns:1fr 420px;gap:40px;padding:56px 0;align-items:start}
.hero h1{font-size:40px;line-height:1.02;margin:0 0 14px;font-weight:800}
.hero p.lead{color:var(--muted);margin:0 0 20px;font-size:16px}
.cta{display:inline-block;padding:12px 18px;border-radius:10px;background:linear-gradient(90deg,var(--accent),#c19d2f);color:#071018;font-weight:700}
.card{background:linear-gradient(180deg,var(--card),rgba(255,255,255,0.01));border-radius:14px;padding:20px;border:1px solid rgba(255,255,255,0.03)}
.series-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.chapter{padding:14px;border-radius:10px;background:linear-gradient(180deg,rgba(255,255,255,0.01),transparent);border:1px solid rgba(255,255,255,0.02)}
.chapter h3{margin:0 0 6px;font-size:16px}
.chapter p{margin:0;color:var(--muted);font-size:13px}
main{padding:40px 0}
.content{display:grid;grid-template-columns:1fr 320px;gap:28px}
.post{background:transparent}
article.post-hero{padding:28px;border-radius:14px;margin-bottom:20px}
article h2{margin-top:0;font-size:26px}
article .meta{color:var(--muted);font-size:13px;margin-bottom:12px}
article p{line-height:1.7;color:#dfe9ec}
.toc{position:sticky;top:96px}
.toc h4{margin:0 0 12px}
.toc ul{list-style:none;padding:0;margin:0;display:grid;gap:8px}
.toc li a{display:block;padding:8px;border-radius:8px;color:var(--muted);font-weight:600}
.toc li a.active{background:var(--glass);color:var(--accent)}
footer{padding:36px 0;color:var(--muted);border-top:1px solid rgba(255,255,255,0.02)}
.contact-form{display:grid;gap:10px}
input,textarea{background:transparent;border:1px solid rgba(255,255,255,0.06);padding:10px;border-radius:8px;color:#e6eef1}
.small{font-size:13px;color:var(--muted)}
@media(max-width:980px){.hero{grid-template-columns:1fr;}.content{grid-template-columns:1fr}.toc{position:relative;top:auto}.series-list{grid-template-columns:1fr}.brand{font-size:16px}}
.fade-in{opacity:0;transform:translateY(8px);animation:fadeUp .6s forwards}
@keyframes fadeUp{to{opacity:1;transform:none}}
pre{background:#071018;padding:12px;border-radius:8px;color:#9dd6c0;overflow:auto}
/* === Math Stories & Legends — Dark Minimalist Style === */
#math-legends {
  background-color: #0d0d0d; /* deep dark background */
  color: #e0e0e0;           /* soft off-white text */
  font-family: 'Georgia', serif; /* classic, elegant vibe */
  max-width: 900px;
  margin: 0 auto;
  padding: 50px 20px;
  line-height: 1.7;
}

#math-legends h2 {
  text-align: center;
  font-size: 2.5rem;
  color: #f5d742; /* golden accent for header */
  margin-bottom: 40px;
  letter-spacing: 1px;
}

#math-legends article {
  background: #1a1a1a; /* subtle contrast for each story */
  border-left: 4px solid #f5d742;
  padding: 25px 20px;
  margin-bottom: 25px;
  border-radius: 8px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

#math-legends article:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(245, 215, 66, 0.2);
}

#math-legends h3 {
  font-size: 1.5rem;
  color: #f5d742; /* golden titles */
  margin-bottom: 15px;
}

#math-legends p {
  font-size: 1.1rem;
  color: #e0e0e0;
}

#math-legends strong {
  color: #f5d742; /* emphasize key formulas & numbers */
}

@media (max-width: 768px) {
  #math-legends {
    padding: 30px 15px;
  }

  #math-legends h2 {
    font-size: 2rem;
  }

  #math-legends h3 {
    font-size: 1.3rem;
  }

  #math-legends p {
    font-size: 1rem;
  }
}