/* Reset y variables */
:root{
  --bg:#0b0c10;
  --panel:#111217;
  --text:#e6e7eb;
  --muted:#a9adb8;
  --primary:#36d399;
  --primary-2:#22c55e;
  --accent:#60a5fa;
  --border:#1f212a;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0; font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,"Helvetica Neue",Arial,"Noto Sans",sans-serif;
  color:var(--text); background:radial-gradient(1200px 600px at 10% 10%,#0f1220 10%,transparent 50%),linear-gradient(180deg,#0b0c10 0%,#0b0c10 100%);
}
img{max-width:100%;display:block}

/* Layout */
.container{width:min(1100px,92%);margin:0 auto}
.site-header{position:sticky;top:0;z-index:50;background:rgba(11,12,16,.7);backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--border)}
.site-header .nav{display:flex;align-items:center;justify-content:space-between;padding:14px 0}
.logo{display:flex;align-items:center;gap:.6rem;color:var(--text);text-decoration:none;font-weight:700}
.logo img{filter:drop-shadow(0 0 6px rgba(54,211,153,.35))}
.menu a{color:var(--text);text-decoration:none;margin-left:1rem;padding:.5rem .75rem;border-radius:8px}
.menu a:hover{background:rgba(255,255,255,.06)}

/* Hero */
.hero{background:linear-gradient(180deg,rgba(54,211,153,.08) 0%,transparent 60%);border-bottom:1px solid var(--border)}
.hero-inner{padding:64px 0;text-align:center}
.hero h1{font-size:clamp(2rem,4.5vw,3rem);margin:0 0 .5rem;letter-spacing:.2px}
.hero p{color:var(--muted);margin:0 0 1.25rem}
.hero-actions{display:flex;gap:.75rem;justify-content:center}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;padding:.75rem 1rem;border-radius:12px;text-decoration:none;font-weight:600;border:1px solid var(--border)}
.btn.primary{background:linear-gradient(180deg,var(--primary) 0%,var(--primary-2) 100%);color:#00110a;border-color:rgba(0,0,0,.2);box-shadow:0 10px 25px -5px rgba(34,197,94,.35)}
.btn.primary:hover{filter:brightness(1.05)}
.btn.ghost{background:rgba(255,255,255,.06);color:var(--text)}
.btn.small{padding:.5rem .75rem;font-size:.925rem}

/* Sections */
.section{padding:36px 0}
.section-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:1rem}
.section-head h2{margin:0;font-size:1.5rem}
.link{color:var(--accent);text-decoration:none}
.link:hover{text-decoration:underline}

/* Cards */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.card{background:var(--panel);border:1px solid var(--border);padding:16px;border-radius:14px;box-shadow:0 6px 18px -6px rgba(0,0,0,.4)}
.card h3{margin:.25rem 0 .35rem;font-size:1.1rem}
.card p{margin:0 0 .75rem;color:var(--muted)}

/* Tips */
.tips{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.tip{background:linear-gradient(180deg,rgba(96,165,250,.12) 0%,rgba(96,165,250,.04) 100%);border:1px dashed #334155;color:#cbd5e1;padding:.75rem;border-radius:12px}

/* Footer */
.site-footer{border-top:1px solid var(--border);background:rgba(11,12,16,.6)}
.footer-inner{display:flex;align-items:center;justify-content:space-between;padding:20px 0}
.footer-nav a{color:var(--muted);text-decoration:none;margin-left:1rem}
.footer-nav a:hover{color:var(--text)}
.copyright{color:#8b90a0;padding:12px 0;border-top:1px solid var(--border);font-size:.9rem}

/* Responsive */
@media (max-width:900px){
  .cards{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:640px){
  .site-header .nav{padding:10px 0}
  .menu a{margin-left:.5rem}
  .hero-inner{padding:44px 0}
  .cards{grid-template-columns:1fr}
  .tips{grid-template-columns:1fr}
}