:root{
  --bg:#07060f; --teal:#00f0d0; --violet:#a070ff; --pink:#ff3d8b; --red:#ff3355; --amber:#ffb340;
  --ink:#d9e6ff; --dim:#7d86a8; --glass:rgba(14,12,32,.72);
  --font: "Segoe UI", "SF Pro Text", Roboto, system-ui, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;height:100%;background:var(--bg);color:var(--ink);font-family:var(--font);overflow:hidden;user-select:none;-webkit-user-select:none;touch-action:none}
canvas#game{position:fixed;inset:0;width:100vw;height:100vh;display:block;cursor:crosshair}
.hidden{display:none !important}
button{font-family:inherit;cursor:pointer;color:var(--ink);background:none;border:0}
.lbl{font-family:var(--mono);font-size:10px;letter-spacing:.14em;color:var(--dim)}

/* HUD */
#hud{position:fixed;inset:0;pointer-events:none}
.hud-top{position:absolute;top:0;left:0;right:0;display:flex;align-items:center;gap:18px;flex-wrap:wrap;
  padding:calc(10px + env(safe-area-inset-top)) 16px 10px;background:linear-gradient(180deg,rgba(7,6,15,.9),rgba(7,6,15,0))}
.stat{display:flex;flex-direction:column;min-width:64px}
.stat .val{font-family:var(--mono);font-size:22px;font-weight:700;color:#fff;text-shadow:0 0 12px var(--violet)}
.bar-wrap{display:flex;flex-direction:column;gap:4px;flex:1;min-width:120px;max-width:280px}
.bar{height:10px;border-radius:6px;background:rgba(255,255,255,.07);border:1px solid rgba(160,112,255,.35);overflow:hidden}
.bar.small{height:7px;flex:1}
.fill{height:100%;width:100%;border-radius:6px;transition:width .15s linear}
.fill.health{background:linear-gradient(90deg,var(--teal),#5cf2ff);box-shadow:0 0 12px var(--teal)}
.fill.health.warn{background:linear-gradient(90deg,var(--amber),#ffd68a);box-shadow:0 0 12px var(--amber)}
.fill.health.crit{background:linear-gradient(90deg,var(--red),var(--pink));box-shadow:0 0 14px var(--red);animation:blink .5s infinite alternate}
.fill.energy{background:linear-gradient(90deg,var(--violet),#d3b8ff);box-shadow:0 0 12px var(--violet)}
.fill.infect{background:linear-gradient(90deg,var(--amber),var(--red))}
@keyframes blink{to{opacity:.55}}
.hud-btns{display:flex;align-items:center;gap:8px;margin-left:auto;pointer-events:auto}
button.icon{width:34px;height:34px;border-radius:50%;border:1px solid rgba(0,240,208,.45);background:var(--glass);font-size:14px;font-weight:700}
button.icon:hover{box-shadow:0 0 12px var(--teal)}
input[type=range]{width:90px;accent-color:var(--teal)}
.banner{position:absolute;top:30%;left:0;right:0;text-align:center;font-family:var(--mono);font-size:clamp(22px,5vw,46px);font-weight:800;letter-spacing:.2em;
  color:#fff;text-shadow:0 0 18px var(--violet),0 0 40px var(--teal);opacity:0;transition:opacity .4s}
.banner.show{opacity:1}
.banner small{display:block;font-size:.38em;letter-spacing:.3em;color:var(--teal);margin-top:8px}
.node-panel{position:absolute;left:50%;transform:translateX(-50%);bottom:calc(14px + env(safe-area-inset-bottom));pointer-events:auto;
  background:var(--glass);border:1px solid rgba(160,112,255,.5);border-radius:14px;padding:10px 14px;min-width:300px;backdrop-filter:blur(8px);
  box-shadow:0 0 24px rgba(160,112,255,.25)}
.np-head{display:flex;justify-content:space-between;align-items:baseline;gap:12px;font-weight:700;letter-spacing:.08em}
.np-head .addr{font-family:var(--mono);font-size:12px;color:var(--teal)}
.np-row{display:flex;align-items:center;gap:8px;margin:8px 0}
.mini{font-family:var(--mono);font-size:11px;width:36px;text-align:right}
.np-btns{display:flex;gap:10px}
button.act{flex:1;padding:10px 8px;border-radius:10px;font-weight:800;letter-spacing:.12em;font-size:13px}
button.act small{font-weight:600;opacity:.8;letter-spacing:0}
button.act.harden{border:1px solid var(--violet);background:rgba(160,112,255,.15)}
button.act.patch{border:1px solid var(--teal);background:rgba(0,240,208,.12)}
button.act:hover:not(:disabled){box-shadow:0 0 16px currentColor}
button.act:disabled{opacity:.35;cursor:not-allowed}
.hint{position:absolute;bottom:calc(10px + env(safe-area-inset-bottom));right:16px;font-family:var(--mono);font-size:11px;color:var(--dim);opacity:.8}

.feed{position:absolute;left:14px;bottom:calc(12px + env(safe-area-inset-bottom));font-family:var(--mono);font-size:10.5px;line-height:1.55;color:var(--dim);
  max-width:38vw;white-space:nowrap;overflow:hidden;text-shadow:0 0 6px #000}
.feed div{opacity:.85}
.feed .ok{color:var(--teal)} .feed .bad{color:var(--red)} .feed .warn{color:var(--amber)} .feed .info{color:var(--violet)}
.rotate{position:absolute;bottom:calc(150px + env(safe-area-inset-bottom));left:0;right:0;text-align:center;font-family:var(--mono);font-size:11px;color:var(--dim);letter-spacing:.15em}

/* Overlays */
.overlay{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;padding:16px;
  background:radial-gradient(ellipse at center,rgba(7,6,15,.55),rgba(7,6,15,.88));backdrop-filter:blur(2px);z-index:10}
.panel{max-width:560px;width:100%;text-align:center;padding:28px 26px;border-radius:20px;background:rgba(12,10,28,.78);
  border:1px solid rgba(160,112,255,.4);box-shadow:0 0 60px rgba(160,112,255,.18),inset 0 0 40px rgba(0,240,208,.05);max-height:96vh;overflow:auto}
.kicker{font-family:var(--mono);font-size:11px;letter-spacing:.35em;color:var(--teal)}
.kicker.red{color:var(--red)}
h1{margin:10px 0 8px;font-size:clamp(34px,8vw,58px);line-height:.95;letter-spacing:.08em;font-weight:900;color:#fff;
  text-shadow:0 0 22px rgba(160,112,255,.8)}
h1 span{color:var(--teal);text-shadow:0 0 22px var(--teal)}
h1.small{font-size:clamp(28px,6vw,42px)}
.sub{color:#b9c3e6;line-height:1.5;font-size:15px}
.fine{color:var(--dim);font-size:12.5px;line-height:1.55}
.btn-col{display:flex;flex-direction:column;gap:10px;margin:18px 0 14px}
button.big{padding:14px 18px;border-radius:12px;font-weight:800;letter-spacing:.16em;font-size:15px;
  border:1px solid var(--teal);background:linear-gradient(90deg,rgba(0,240,208,.18),rgba(160,112,255,.18));box-shadow:0 0 18px rgba(0,240,208,.25)}
button.big:hover{box-shadow:0 0 28px rgba(0,240,208,.6)}
button.big.alt{border-color:var(--violet);background:rgba(160,112,255,.12);box-shadow:0 0 14px rgba(160,112,255,.25)}
button.big.featured{font-size:17px;padding:18px;border-color:var(--pink);background:linear-gradient(90deg,rgba(255,61,139,.22),rgba(160,112,255,.22));box-shadow:0 0 26px rgba(255,61,139,.35);animation:pulse 2.4s ease-in-out infinite}
button.big.featured:hover{box-shadow:0 0 36px rgba(255,61,139,.7)}
@keyframes pulse{50%{box-shadow:0 0 34px rgba(255,61,139,.55)}}
.jp{display:block;font-size:13px;letter-spacing:.4em;color:var(--pink);margin-top:4px;font-weight:700}
button.big small{display:block;font-size:10px;letter-spacing:.25em;color:var(--dim);margin-top:4px;font-weight:600}
.howto{text-align:left;font-size:13px;color:#aab3d6;display:grid;gap:6px;margin:6px auto 10px;max-width:440px}
.howto b{color:#fff}
.k{font-family:var(--mono);font-size:10px;border:1px solid var(--dim);border-radius:4px;padding:0 5px;margin-left:4px;color:var(--ink)}
.best{font-family:var(--mono);font-size:12px;color:var(--dim)}
button.link{margin-top:8px;color:var(--teal);font-size:12px;letter-spacing:.2em;text-decoration:underline}
.final{display:flex;justify-content:center;gap:28px;margin:16px 0 6px}
.final div{display:flex;flex-direction:column}
.final b{font-family:var(--mono);font-size:26px;color:#fff}
.newbest{font-family:var(--mono);color:var(--amber);letter-spacing:.3em;text-shadow:0 0 12px var(--amber)}

@media (max-width:700px){
  .hud-top{gap:10px;padding:calc(8px + env(safe-area-inset-top)) 10px 8px}
  .stat .val{font-size:18px}
  .bar-wrap{min-width:90px}
  input[type=range]{display:none}
  .hint{display:none}
  .feed{display:none}
  .node-panel{min-width:0;width:calc(100% - 20px)}
  .howto{font-size:12px}
}

/* short landscape screens (phones on their side) */
@media (max-height:500px){
  .hud-top{gap:10px;padding:calc(6px + env(safe-area-inset-top)) 12px 4px}
  .stat{min-width:44px}
  .stat .val{font-size:16px}
  .bar{height:7px}
  button.icon{width:28px;height:28px;font-size:12px}
  input[type=range]{width:70px}
  .feed,.hint{display:none}
  .node-panel{left:auto;right:10px;transform:none;bottom:8px;min-width:0;width:250px;padding:7px 10px;border-radius:12px}
  .np-head{font-size:12px}
  .np-row{margin:5px 0}
  button.act{padding:7px 6px;font-size:11px}
  .panel{padding:16px 18px}
  h1{font-size:34px}
  .sub{font-size:13px;margin:6px 0}
  .btn-col{margin:10px 0 8px;gap:8px}
  button.big{padding:10px 14px;font-size:13px}
  button.big.featured{padding:12px;font-size:15px}
  .howto{font-size:11.5px;gap:3px}
}
/* v1.1: difficulty toggle + wave-1 how-to hint */
.mode{display:flex;align-items:center;justify-content:center;gap:8px;margin:0 0 12px}
.mode .lbl{margin-right:4px}
button.seg{padding:7px 16px;border-radius:999px;border:1px solid rgba(160,112,255,.45);background:rgba(160,112,255,.08);
  font-family:var(--mono);font-size:12px;font-weight:800;letter-spacing:.2em;color:var(--dim)}
button.seg.on{border-color:var(--teal);color:#fff;background:rgba(0,240,208,.18);box-shadow:0 0 14px rgba(0,240,208,.4)}
.howto-hint{position:absolute;top:46%;left:50%;transform:translateX(-50%);display:grid;gap:7px;padding:14px 22px;border-radius:14px;
  background:rgba(10,8,24,.78);border:1px solid rgba(0,240,208,.5);box-shadow:0 0 28px rgba(0,240,208,.25);backdrop-filter:blur(6px);
  font-size:15px;color:#e9f2ff;text-align:left;pointer-events:none;opacity:0;transition:opacity .8s ease;white-space:nowrap}
.howto-hint.show{opacity:1}
.howto-hint.fade{opacity:0}
.howto-hint .hh-title{font-family:var(--mono);font-size:11px;letter-spacing:.35em;color:var(--teal);text-align:center;margin-bottom:2px}
.howto-hint .dot{display:inline-block;width:10px;height:10px;border-radius:50%;margin-right:10px;background:#ff3c5a;box-shadow:0 0 10px #ff3c5a;vertical-align:middle}
.howto-hint .dot.shield{background:var(--violet);box-shadow:0 0 10px var(--violet)}
.howto-hint .dot.patch{background:var(--teal);box-shadow:0 0 10px var(--teal)}
@media (max-width:700px),(max-height:500px){.howto-hint{font-size:12.5px;padding:10px 14px;top:40%;gap:5px}.mode{margin-bottom:8px}button.seg{padding:5px 12px}}
#over h1 span{color:var(--red);text-shadow:0 0 22px var(--red)}