:root{
  --bg:#140b26; --bg2:#1e1136; --ink:#f2ecff; --dim:#b7a8d8;
  --teal:#3fd0c9; --teal2:#8ef7ff; --amber:#ffb347; --crim:#e8425a;
  --panel:rgba(24,14,46,.88); --edge:rgba(142,247,255,.25);
}
*{box-sizing:border-box; margin:0; padding:0}
html,body{height:100%}
body{
  font-family:ui-rounded,"Avenir Next",Segoe UI,system-ui,-apple-system,sans-serif;
  background:var(--bg); color:var(--ink); overflow:hidden;
}
b{font-weight:700}
/* ---------- game page ---------- */
#game-canvas{position:fixed; inset:0; width:100%; height:100%; display:block; cursor:crosshair}
#hud-top{position:fixed; top:8px; left:10px; right:10px; pointer-events:none; z-index:5}
.hud-row{display:flex; flex-wrap:wrap; gap:6px}
.chip{background:var(--panel); border:1px solid var(--edge); border-radius:999px; padding:5px 11px;
  font-size:12px; color:var(--dim); backdrop-filter:blur(6px); white-space:nowrap}
.chip b{color:var(--ink)}
.chip.amber b{color:var(--amber)}
.chip.grow{min-width:120px}
.keepbar{display:flex; align-items:center; gap:8px; margin-top:6px; font-size:10px; letter-spacing:.12em}
.keepbar .kp{color:var(--teal2); width:76px; text-align:right}
.keepbar .ke{color:var(--crim); width:76px; text-align:right}
.bar{width:min(260px,42vw); height:9px; background:rgba(0,0,0,.55); border:1px solid var(--edge); border-radius:6px; overflow:hidden}
.fill{height:100%; width:100%; transition:width .25s}
.pfill{background:linear-gradient(90deg,#1f8f8a,var(--teal2))}
.efill{background:linear-gradient(90deg,#8f1f33,var(--crim))}
#hud-bottom{position:fixed; left:0; right:0; bottom:8px; display:flex; flex-direction:column; align-items:center; gap:6px; z-index:6}
.selinfo{font-size:12px; color:var(--teal2); background:var(--panel); padding:3px 12px; border-radius:999px; border:1px solid var(--edge)}
#build-bar{display:flex; gap:8px; flex-wrap:wrap; justify-content:center; pointer-events:auto}
#build-bar button, .big-btn{
  pointer-events:auto; cursor:pointer; font:inherit; font-size:13px; font-weight:600;
  color:var(--ink); background:linear-gradient(180deg,#2b1a4d,#1a0f30);
  border:1px solid var(--edge); border-radius:12px; padding:10px 14px; min-width:76px;
  box-shadow:0 0 12px rgba(63,208,201,.15), inset 0 1px 0 rgba(255,255,255,.08);
  transition:transform .12s, box-shadow .12s, opacity .2s;
}
#build-bar button small{display:block; font-weight:400; font-size:10px; color:var(--dim)}
#build-bar button:hover, .big-btn:hover{transform:translateY(-2px); box-shadow:0 0 18px rgba(142,247,255,.35)}
#build-bar button.off{opacity:.38}
#touch-pad{display:none; position:fixed; z-index:7; left:12px; bottom:70px;
  grid-template-columns:repeat(3,46px); grid-template-rows:repeat(3,46px); gap:6px;
  grid-template-areas:". up ." "left . right" ". down ." }
.pad{pointer-events:auto; appearance:none; border:1px solid var(--edge); border-radius:12px;
  background:var(--panel); color:var(--teal2); font-size:18px; cursor:pointer; touch-action:none}
.pad.up{grid-area:up} .pad.left{grid-area:left} .pad.right{grid-area:right}
.pad.down{grid-area:down}
.pad.zoom{position:absolute; left:160px; bottom:0; width:46px; height:46px}
#btn-zoom-out.pad.zoom{bottom:60px}
@media (pointer:coarse){ #touch-pad{display:grid} }
/* overlays */
.overlay{position:fixed; inset:0; display:none; align-items:center; justify-content:center;
  background:rgba(10,5,20,.72); backdrop-filter:blur(4px); z-index:20; padding:16px}
.overlay.show{display:flex}
.panel{max-width:560px; width:100%; background:var(--panel); border:1px solid var(--edge);
  border-radius:18px; padding:26px 24px; text-align:center; box-shadow:0 10px 60px rgba(0,0,0,.6)}
.panel h1{font-size:clamp(28px,7vw,44px); letter-spacing:.06em;
  background:linear-gradient(90deg,var(--teal2),var(--amber)); -webkit-background-clip:text; background-clip:text; color:transparent}
.panel .tag{color:var(--dim); margin:6px 0 14px; font-size:14px}
.howto{list-style:none; text-align:left; font-size:13px; line-height:1.7; color:var(--dim); margin-bottom:16px}
.howto li{margin:4px 0; padding-left:18px; position:relative}
.howto li::before{content:"◆"; position:absolute; left:0; color:var(--amber); font-size:9px; top:6px}
.howto b{color:var(--ink)}
.big-btn{font-size:16px; padding:12px 26px; border-radius:14px;
  background:linear-gradient(180deg,#2ea88f,#1c6f63); box-shadow:0 0 22px rgba(63,208,201,.45)}
#toast{position:fixed; left:50%; top:64px; transform:translateX(-50%); z-index:30; pointer-events:none;
  background:var(--panel); border:1px solid var(--edge); color:var(--teal2); font-size:13px;
  padding:8px 16px; border-radius:999px; opacity:0; transition:opacity .25s}
#toast.on{opacity:1}
/* ---------- landing page ---------- */
body.landing{overflow:auto}
.landing .hero{position:relative; min-height:88vh; display:flex; align-items:center; overflow:hidden;
  background:radial-gradient(120% 90% at 70% 10%, #2b1a55 0%, var(--bg) 55%)}
#hero-preview{position:absolute; inset:0; width:100%; height:100%}
.hero-inner{position:relative; z-index:2; padding:min(6vw,48px); max-width:640px}
.hero h1{font-size:clamp(38px,9vw,72px); letter-spacing:.04em; line-height:1.02;
  background:linear-gradient(90deg,var(--teal2) 10%,var(--amber) 90%); -webkit-background-clip:text; background-clip:text; color:transparent}
.hero .tagline{margin-top:10px; font-size:clamp(15px,2.6vw,20px); color:var(--dim)}
.hero .cta{margin-top:22px; display:flex; gap:12px; flex-wrap:wrap}
a.btn, .btn{display:inline-block; text-decoration:none; font-weight:700; font-size:16px; color:#08211e;
  background:linear-gradient(90deg,var(--teal2),var(--teal)); padding:14px 30px; border-radius:14px;
  box-shadow:0 0 26px rgba(142,247,255,.4); transition:transform .15s, box-shadow .15s}
a.btn:hover{transform:translateY(-2px) scale(1.02); box-shadow:0 0 38px rgba(142,247,255,.6)}
a.btn.ghost{background:transparent; color:var(--teal2); border:1px solid var(--edge); box-shadow:none}
section{max-width:1060px; margin:0 auto; padding:min(8vw,72px) min(6vw,32px)}
section h2{font-size:clamp(22px,4vw,32px); margin-bottom:18px; color:var(--teal2); letter-spacing:.05em}
#features{list-style:none; display:grid; grid-template-columns:repeat(auto-fit,minmax(220px,1fr)); gap:14px}
#features li{background:var(--bg2); border:1px solid var(--edge); border-radius:14px; padding:16px; font-size:14px; color:var(--dim); line-height:1.6}
#features li b{display:block; color:var(--ink); font-size:15px; margin-bottom:4px}
#controls .keys{display:grid; grid-template-columns:repeat(auto-fit,minmax(200px,1fr)); gap:12px; font-size:14px; color:var(--dim); line-height:1.8}
kbd{background:#241a45; border:1px solid var(--edge); border-bottom-width:2px; border-radius:6px; padding:2px 8px; font:inherit; font-size:12px; color:var(--teal2)}
#gallery{display:grid; grid-template-columns:repeat(auto-fit,minmax(240px,1fr)); gap:14px}
#gallery img{width:100%; border-radius:14px; border:1px solid var(--edge); background:#000}
footer{text-align:center; color:#6b5f8a; font-size:12px; padding:26px}