:root{--bg:#07090e;--ink:#d8efe4;--accent:#3dffc0;--amber:#ffd166;--panel:#0c1210}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--ink);font-family:ui-monospace,Menlo,Consolas,monospace}
a{color:var(--accent)}
.wrap{max-width:1060px;margin:0 auto;padding:0 20px}
header{padding:14px 0;border-bottom:1px solid #1d2b25}
header .wrap{display:flex;justify-content:space-between;align-items:center}
.logo{letter-spacing:4px;color:var(--accent);font-weight:700}
nav a{margin-left:18px;color:#9fc4b1;text-decoration:none;font-size:14px}
.hero{position:relative;padding:52px 0 30px;text-align:center;background:
  radial-gradient(60% 90% at 50% 0%,#10241c 0%,var(--bg) 70%)}
.hero h1{font-size:clamp(38px,8vw,84px);margin:0;letter-spacing:10px;color:#eafff4;
  text-shadow:0 0 26px #2fff9a55,0 0 70px #2fff9a22}
.hero .tag{margin:10px 0 26px;color:#9fc4b1;font-size:clamp(13px,2.4vw,17px);letter-spacing:1px}
#hero-preview{width:min(92vw,880px);height:min(48vw,380px);border:1px solid #23453a;
  border-radius:14px;background:#04060a;box-shadow:0 0 60px #000c inset,0 10px 40px #0009}
.play{display:inline-block;margin:26px 0 8px;padding:16px 44px;font-size:19px;letter-spacing:3px;
  color:#052818;background:linear-gradient(180deg,#5cffc0,#1fae74);text-decoration:none;
  border-radius:10px;font-weight:700;box-shadow:0 0 34px #3dffc044}
.play:hover{filter:brightness(1.15)}
section{padding:44px 0}
h2{color:var(--accent);letter-spacing:4px;font-size:22px;margin:0 0 18px}
#hero-preview-wrap{text-align:center}
.cap{color:#6f9382;font-size:12px;margin-top:8px}
#gallery{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
#gallery figure{margin:0;background:var(--panel);border:1px solid #23453a;border-radius:10px;padding:10px}
#gallery img{width:100%;height:auto;display:block;border-radius:6px}
#gallery figcaption{color:#6f9382;font-size:12px;margin-top:8px;letter-spacing:1px;text-transform:uppercase}
#features{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:14px}
#features li{background:var(--panel);border:1px solid #23453a;border-left:3px solid var(--accent);
  border-radius:8px;padding:14px 16px;font-size:14px;line-height:1.5}
#controls{background:var(--panel);border:1px solid #23453a;border-radius:12px;padding:22px}
#controls .keys{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.kbd{display:inline-block;padding:4px 10px;border:1px solid #35574a;border-bottom-width:3px;
  border-radius:6px;color:var(--amber);font-size:13px;background:#11201a}
footer{border-top:1px solid #1d2b25;padding:26px 0;color:#557265;font-size:12px;letter-spacing:1px}
@media (max-width:640px){
  .hero{padding:34px 0 20px}
  nav a{margin-left:10px;font-size:12px}
  .play{padding:14px 30px;font-size:16px}
}