/* Layout: same "Photon" system as oldgamevm.com (black ground, glass cards, white primary button, centered hero + app window, colored glow).
   Each page sets --acc / --acc-rgb on <body>; studio pages use violet like Oldgame VM. Dark-only by design. */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500&family=Playwrite+AU+VIC:wght@400&display=swap');
:root{
  --bg:#000; --plate:#0d0d0dc7; --text:#f7f7f7; --muted:#a4a4a4; --soft:#6b6b6b;
  --stroke:#ffffff12; --stroke-strong:#ffffff1f; --glass-top:#ffffff38;
  --acc:#b399ff; --acc-rgb:179,153,255;
  --dn:#ff7a3d; --dn-rgb:255,122,61;
  --at:#8fd16a; --at-rgb:143,209,106;
  --og:#b399ff; --og-rgb:179,153,255;
  --font:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",ui-sans-serif,system-ui,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,Menlo,monospace;
  --script:"Playwrite AU VIC",cursive,"Brush Script MT",sans-serif;
  --ease:cubic-bezier(.2,.7,.3,1); --max:1240px;
  font-family:var(--font); color:var(--text); background:var(--bg); line-height:1.5; color-scheme:dark;
}
*, ::before, ::after { box-sizing: border-box; }
html{scroll-behavior:smooth}
html, body{width:100%;max-width:100%;overflow-x:hidden}
body{margin:0;background:var(--bg);position:relative}
body::before,body::after{content:"";position:fixed;border-radius:50%;filter:blur(80px);pointer-events:none;z-index:-1}
body::before{width:60vw;height:60vw;max-width:800px;max-height:800px;top:-150px;left:-100px;background:radial-gradient(ellipse,rgba(var(--acc-rgb),.13),transparent 70%);animation:drift-a 22s infinite ease-in-out}
body::after{width:50vw;height:50vw;max-width:700px;max-height:700px;top:30%;right:-100px;background:radial-gradient(ellipse,rgba(255,138,206,.07),transparent 70%);animation:drift-b 28s infinite ease-in-out}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
p{margin:0}
h1,h2,h3{margin:0;text-wrap:balance}
:focus-visible{outline:2px solid var(--acc);outline-offset:3px}
.shell{width:100%;max-width:var(--max);margin:auto;padding-left:max(1.5rem,env(safe-area-inset-left,0px));padding-right:max(1.5rem,env(safe-area-inset-right,0px))}

/* project header (tầng 2) = glass site-header của oldgamevm.com */
.pb{position:sticky;top:0;z-index:40;background:rgba(10,10,12,.72);border-bottom:1px solid var(--stroke);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);box-shadow:0 4px 30px rgba(0,0,0,.4)}
.pb .shell{min-height:68px;display:flex;align-items:center;gap:2.5rem;flex-wrap:wrap}
.pb-name{display:flex;align-items:center;gap:.7rem;font-weight:700;letter-spacing:-.03em;white-space:nowrap}
.pb-name img,.pb-name .mark{width:34px;height:34px;border-radius:9px;box-shadow:0 4px 16px rgba(var(--acc-rgb),.3)}
.mark{display:grid;place-items:center;background:linear-gradient(145deg,rgba(var(--acc-rgb),.9),rgba(var(--acc-rgb),.35));color:#000;font-weight:800;font-size:.85rem;border:1px solid rgba(255,255,255,.18)}
.pb nav{display:flex;gap:1.8rem;color:var(--muted);font-size:.9rem;font-weight:500;flex:1}
.pb nav a:hover,.pb nav a[aria-current]{color:var(--text);text-shadow:0 0 12px rgba(255,255,255,.35)}
.pb-cta{font-size:.82rem;font-weight:600;border:1px solid var(--stroke-strong);background:var(--plate);padding:.6rem 1rem;border-radius:8px;transition:all .135s var(--ease)}
.pb-cta:hover{border-color:var(--acc);box-shadow:0 0 20px rgba(var(--acc-rgb),.25);transform:translateY(-1px)}

/* buttons */
.actions{display:flex;gap:.9rem;justify-content:center;align-items:center;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:.6rem;padding:.85rem 1.4rem;border-radius:10px;font-weight:600;font-size:.92rem;transition:all .135s var(--ease)}
.btn-main{background:#fff;color:#000;box-shadow:0 4px 20px rgba(255,255,255,.2),0 0 0 1px rgba(255,255,255,.9)}
.btn-main:hover{box-shadow:0 6px 28px rgba(255,255,255,.35);transform:translateY(-2px)}
.btn-quiet{background:var(--plate);border:1px solid var(--stroke-strong);backdrop-filter:blur(30px)}
.btn-quiet:hover{border-color:var(--glass-top);transform:translateY(-2px)}

/* hero: centered, icon, title, script line, window */
.hero{padding-top:3.5rem;padding-bottom:2.5rem;display:flex;flex-direction:column;align-items:center;text-align:center;width:100%}
.hero-copy{display:flex;flex-direction:column;align-items:center;width:100%;max-width:820px;animation:entrance 1s var(--ease) both}
.hero-icon{position:relative;margin-bottom:1.2rem;display:inline-flex}
.hero-icon::before{content:"";position:absolute;inset:-12px;background:radial-gradient(circle,rgba(var(--acc-rgb),.45),rgba(var(--acc-rgb),.15) 50%,transparent 75%);filter:blur(16px);border-radius:30%;z-index:-1}
.hero-icon img,.hero-icon .mark{width:76px;height:76px;border-radius:22%;font-size:1.6rem;box-shadow:inset 0 0 0 1px rgba(255,255,255,.2),0 18px 50px rgba(var(--acc-rgb),.4),0 2px 8px #000;border:1px solid rgba(255,255,255,.15)}
.hero h1{font-size:clamp(2.6rem,6.8vw,5.8rem);font-weight:750;letter-spacing:-.06em;line-height:1.02;color:#fff}
.script{font-family:var(--script);font-size:clamp(1.2rem,4.2vw,3.2rem);line-height:1.25;margin-top:.35rem;color:color-mix(in srgb,var(--acc) 35%,#d8d4de);text-shadow:0 0 20px rgba(var(--acc-rgb),.25);text-wrap:balance;max-width:300px;margin-inline:auto}
@media(min-width:640px){.script{max-width:none}}
.lede{max-width:580px;color:var(--muted);font-size:clamp(.95rem,2.5vw,1.12rem);line-height:1.65;margin:1.4rem auto 2rem;padding-inline:.5rem}
.platforms{margin-top:1.8rem;font-size:.85rem;color:var(--soft)}

.stage{width:100%;max-width:1060px;margin:2.5rem auto 0;position:relative;isolation:isolate;animation:entrance 1.2s var(--ease) both}
.stage::before{content:"";position:absolute;inset:-12% -8%;background:radial-gradient(ellipse at 50% 30%,rgba(var(--acc-rgb),.22),transparent 60%),radial-gradient(ellipse at 70% 60%,rgba(255,138,206,.1),transparent 50%);filter:blur(50px);z-index:-1;pointer-events:none}
.window{background:#0a0a0c;border-radius:16px;border:1px solid #ffffff24;box-shadow:0 0 0 1px rgba(255,255,255,.08),0 30px 90px rgba(0,0,0,.9),0 0 50px rgba(var(--acc-rgb),.18);overflow:hidden}
.chrome{height:42px;background:#111114;border-bottom:1px solid rgba(255,255,255,.08);display:flex;align-items:center;gap:8px;padding:0 1.2rem;color:var(--soft);font:.68rem var(--mono);letter-spacing:.12em;text-transform:uppercase}
.chrome i{width:10px;height:10px;border-radius:50%;background:#f5566f}
.chrome i:nth-child(2){background:#f5a623}.chrome i:nth-child(3){background:#7ed321}
.chrome span{margin-left:.6rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

/* media slot: real img/video fills it; until then it shows the expected file name */
.media{aspect-ratio:16/9;max-width:100%;width:100%;background:radial-gradient(circle at 70% 25%,rgba(var(--acc-rgb),.18),transparent 55%),#0d0d0d;display:grid;place-items:center;color:var(--soft);font:.72rem var(--mono);letter-spacing:.08em;text-align:center;padding:1rem;overflow:hidden}
.media img,.media video{width:100%;height:100%;object-fit:cover}

/* sections */
section{padding-top:3rem;padding-bottom:3rem}
.sec-head{display:flex;justify-content:space-between;align-items:flex-end;gap:2rem;margin-bottom:1.25rem;flex-wrap:wrap}
.sec-head.center{justify-content:center;text-align:center}
h2{font-size:clamp(2rem,3.8vw,3rem);font-weight:700;letter-spacing:-.04em;line-height:1.1;color:#fff}
.sec-note{color:var(--muted);max-width:52ch}
.text-link{font-size:.86rem;color:color-mix(in srgb,var(--acc) 70%,#fff);font-weight:500}
.text-link:hover{color:#fff}

/* glass cards (game-card / feature-card) */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.2rem}
.grid.two{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.card{background:var(--plate);border:1px solid var(--stroke);border-radius:12px;padding:1.6rem;backdrop-filter:blur(30px) saturate(180%);box-shadow:inset 0 0 0 1px var(--stroke);transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .135s var(--ease);display:flex;flex-direction:column}
a.card:hover,.card.lift:hover{border-color:var(--stroke-strong);box-shadow:inset 0 1px 0 var(--glass-top),0 0 44px rgba(var(--acc-rgb),.18);transform:translateY(-3px)}
.card .media{border-radius:8px;border:1px solid var(--stroke);margin-bottom:1.2rem}
.card .media img{transition:transform .4s var(--ease)}
a.card:hover .media img{transform:scale(1.04)}
.card h3{font-size:1.28rem;letter-spacing:-.03em;margin:.4rem 0}
.card p{color:var(--muted);font-size:.95rem;line-height:1.6}
.card .go{margin-top:auto;padding-top:1.2rem;font-size:.85rem;font-weight:600;color:color-mix(in srgb,var(--acc) 70%,#fff)}
.status{font-size:.82rem;font-weight:500;color:color-mix(in srgb,var(--acc) 70%,#fff)}
.status.live{color:#52e396}.status.soon{color:var(--soft)}
.kind{font:.68rem var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--soft);margin-left:.6rem}

/* tool row: wide card, icon left */
.tool{display:grid;grid-template-columns:auto 1fr auto;gap:1.6rem;align-items:center}
.tool img{width:64px;height:64px;border-radius:22%;box-shadow:0 10px 30px rgba(var(--acc-rgb),.35)}
.tool .go{margin:0;padding:0}

/* news list */
.news{display:grid;gap:.6rem}
.news a{display:grid;grid-template-columns:110px 150px 1fr auto;gap:1.2rem;align-items:baseline;padding:1rem 1.4rem;border-radius:10px;background:var(--plate);border:1px solid var(--stroke);transition:border-color .135s var(--ease)}
.news a:hover{border-color:var(--stroke-strong)}
.news a::after{content:"↗";color:var(--soft)}
.news time{font:.78rem var(--mono);color:var(--soft);font-variant-numeric:tabular-nums}
.news b{font-size:.82rem;font-weight:600}
.news span{font-weight:500}

/* big CTA card = download-card */
.cta-card{display:grid;grid-template-columns:1fr minmax(0,460px);gap:4rem;align-items:center;background:radial-gradient(circle at 10% 20%,rgba(var(--acc-rgb),.1),transparent 60%),radial-gradient(circle at 90% 80%,rgba(100,140,255,.06),transparent 50%),#0c0c0e;border:1px solid var(--stroke-strong);border-radius:20px;padding:4rem;box-shadow:0 24px 70px rgba(0,0,0,.8),inset 0 1px 0 var(--glass-top)}
.cta-card h2{font-weight:500;font-size:clamp(2.2rem,4vw,3.4rem)}
.cta-card .sec-note{margin-top:1rem}
.cta-side{display:grid;gap:.8rem}
.dl-row{display:flex;justify-content:space-between;align-items:center;gap:1rem;padding:1rem 1.2rem;border-radius:10px;background:#111114;border:1px solid var(--stroke)}
.dl-row small{display:block;color:var(--soft);font-size:.78rem}
.dl-row .btn{padding:.6rem 1rem;font-size:.85rem}
.copy code{display:block;font:500 1rem var(--mono);padding:1rem 1.2rem;border-radius:10px;background:#111114;border:1px solid var(--stroke);user-select:all;color:color-mix(in srgb,var(--acc) 60%,#fff)}

/* faq */
details.card summary{cursor:pointer;list-style:none;font-weight:600;font-size:1.05rem}
details.card summary::-webkit-details-marker{display:none}
details.card summary::after{content:"+";float:right;color:var(--acc)}
details.card[open] summary::after{content:"−"}
details.card p{padding-top:.9rem}

footer .shell{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:2rem;padding-top:2.5rem;padding-bottom:2.5rem;border-top:1px solid var(--stroke);color:var(--soft);font-size:.82rem}
footer b{display:block;color:var(--text);font-size:.95rem;letter-spacing:-.03em;margin-bottom:.4rem}
footer a{display:block;color:var(--muted);padding:.1rem 0}
footer a:hover{color:var(--text)}

@keyframes entrance{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
@keyframes drift-a{0%,100%{transform:translate(-10%,-6%)}50%{transform:translate(18%,6%) scale(1.15)}}
@keyframes drift-b{0%,100%{transform:translate(0,0)}50%{transform:translate(-14%,-8%) scale(1.1)}}

@media(max-width:820px){
  .pb .shell{gap:1rem;padding-top:.8rem;padding-bottom:.8rem}
  .pb nav{order:3;flex-basis:100%;overflow-x:auto;gap:1.2rem}
  .pb-cta{margin-left:auto}
  .sec-head{flex-direction:column;align-items:flex-start;gap:.4rem}
  .tool{grid-template-columns:auto 1fr}
  .tool .go{grid-column:1/-1}
  .news a{grid-template-columns:1fr auto;gap:.2rem 1rem}
  .news span{grid-column:1}
  .cta-card{grid-template-columns:1fr;gap:2rem;padding:2rem}
  footer .shell{grid-template-columns:1fr 1fr}
  .shell{padding-left:max(1rem,env(safe-area-inset-left,0px));padding-right:max(1rem,env(safe-area-inset-right,0px))}
}
@media(prefers-reduced-motion:reduce){*,::before,::after{animation:none!important;transition:none!important}html{scroll-behavior:auto}}