:root {
  --bg: #06080c;
  --panel: #0d141b;
  --panel2: #111c25;
  --border: #1f3340;
  --amber: #ffb454;
  --green: #39d353;
  --green-dim: #2a8c3a;
  --blue: #58a6ff;
  --purple: #bd93f9;
  --fg: #d8e6dd;
  --dim: #6f8a7e;
  --mono: "JetBrains Mono", "Fira Code", "SF Mono", Menlo, Consolas, monospace;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background:
    radial-gradient(1200px 600px at 50% -10%, #0c1a14 0%, var(--bg) 60%),
    var(--bg);
  color: var(--fg); font-family: var(--mono);
  min-height: 100vh; display: flex; justify-content: center; padding: 18px;
  -webkit-text-size-adjust: 100%; text-size-adjust: 100%;
}
#crt {
  width: 100%; max-width: 1080px; border: 1px solid var(--border);
  border-radius: 14px; background: var(--panel); overflow: hidden;
  box-shadow: 0 0 0 1px #000, 0 24px 80px rgba(0,0,0,.6), inset 0 0 120px rgba(57,211,83,.03);
  position: relative; display: flex; flex-direction: column;
}
/* scanlines */
#crt::after {
  content: ""; position: absolute; inset: 0; pointer-events: none; z-index: 50;
  background: repeating-linear-gradient(to bottom, rgba(0,0,0,0) 0 2px, rgba(0,0,0,.18) 2px 3px);
  mix-blend-mode: multiply; opacity: .5;
}

/* top bar */
#topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 14px 18px; border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, #0f1a13, var(--panel));
}
.logo { font-size: 20px; letter-spacing: .04em; font-weight: 700; color: var(--amber); }
.logo span { color: var(--green); text-shadow: 0 0 14px rgba(57,211,83,.5); }
.logo small { color: var(--dim); font-size: 11px; font-weight: 400; letter-spacing: .12em; text-transform: uppercase; margin-left: 6px; }
.stats { display: flex; align-items: center; gap: 12px; font-size: 13px; color: var(--dim); }
.stats b { color: var(--green); }
.xpbar { width: 140px; height: 9px; background: #0a1117; border: 1px solid var(--border); border-radius: 99px; overflow: hidden; }
#xpfill { height: 100%; width: 0; background: linear-gradient(90deg, var(--green-dim), var(--green)); transition: width .4s; box-shadow: 0 0 12px var(--green); }
.inv { color: var(--amber); letter-spacing: .1em; }

/* quest banner */
#quest {
  padding: 14px 18px; border-bottom: 1px solid var(--border);
  background: var(--panel2);
}
.quest-label { font-size: 10px; letter-spacing: .28em; color: var(--amber); }
#quest h2 { margin: 4px 0 4px; font-size: 18px; color: #fff; }
#quest p { margin: 0; font-size: 13.5px; color: var(--fg); }
#quest .done { color: var(--green); }

/* stage: room + console */
#stage { display: grid; grid-template-columns: 1fr 1.2fr; gap: 0; }
@media (max-width: 760px) { #stage { grid-template-columns: 1fr; } }

#room { padding: 16px 18px; border-right: 1px solid var(--border); background: #0a1016; }
#room-canvas {
  display: block; width: 100%; height: auto; image-rendering: pixelated;
  image-rendering: crisp-edges; border: 1px solid var(--border); border-radius: 8px;
  background: #07060c; box-shadow: inset 0 0 30px rgba(0,0,0,.55), 0 0 18px rgba(57,211,83,.08);
}
#room-canvas.pulse { animation: artpulse .5s ease; }
@keyframes artpulse { 0% { filter: brightness(1.7) saturate(1.3); } 100% { filter: brightness(1); } }

/* discovered map (tree) */
#map-wrap { margin-top: 14px; }
.map-label { color: var(--dim); font-size: 11px; letter-spacing: .12em; text-transform: uppercase; margin-bottom: 5px; }
.map-label code { color: var(--amber); text-transform: none; letter-spacing: 0; }
#map { margin: 0; font-size: 12px; line-height: 1.5; white-space: pre; overflow-x: auto; }
#map .m-root { color: var(--amber); }
#map .m-tree { color: var(--dim); }
#map .m-dir { color: var(--blue); }
#map .m-file { color: var(--green); }
#map .m-read { color: var(--green-dim); }
#map .m-hidden { color: var(--purple); }
#map .m-you { color: var(--amber); font-weight: 700; }
#room-info { margin-top: 12px; font-size: 13px; }
#room-info .here { color: var(--amber); }
#room-info .grp { color: var(--dim); margin-top: 10px; font-size: 11px; letter-spacing: .12em; text-transform: uppercase; }
#room-info .exit { color: var(--blue); }
#room-info .item { color: var(--green); }
#room-info .ico { width: 16px; display: inline-block; }
#room-info .row { padding: 2px 0; }

#console { padding: 14px 16px; display: flex; flex-direction: column; min-height: 320px; }
#screen { flex: 1; overflow-y: auto; font-size: 13.5px; line-height: 1.5; max-height: 340px; }
.line { white-space: pre-wrap; word-break: break-word; }
.cmd { color: #eaf2ec; }
.cmd .p { color: var(--green); font-weight: 700; }
.out { color: #c6d6cc; }
.err { color: #ff7b72; }
.sys { color: var(--amber); }
#inputline { display: flex; align-items: baseline; border-top: 1px solid var(--border); padding-top: 10px; margin-top: 8px; }
#ps1 { color: var(--green); font-weight: 700; white-space: pre; }
#cmd { flex: 1; background: transparent; border: 0; outline: none; color: #eaf2ec; font-family: var(--mono); font-size: 13.5px; caret-color: var(--green); }

/* BIT mascot */
#bit {
  display: flex; align-items: center; gap: 12px; padding: 12px 18px;
  border-top: 1px solid var(--border); background: var(--panel2);
}
.bit-face {
  font-size: 22px; color: var(--green); flex: 0 0 auto;
  text-shadow: 0 0 12px rgba(57,211,83,.6); animation: bob 2.4s ease-in-out infinite;
}
@keyframes bob { 0%,100%{ transform: translateY(0); } 50%{ transform: translateY(-3px); } }
.bit-bubble {
  background: #0a1016; border: 1px solid var(--border); border-radius: 10px;
  padding: 9px 14px; font-size: 13px; color: var(--fg); position: relative; flex: 1;
}
.bit-bubble code { color: var(--amber); }
.bit-bubble b { color: var(--green); }

/* bottom bar */
#botbar {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  padding: 12px 18px; border-top: 1px solid var(--border); background: var(--panel);
}
#botbar button {
  font-family: var(--mono); font-size: 12.5px; cursor: pointer; background: #14202a;
  border: 1px solid var(--border); color: var(--fg); padding: 7px 14px; border-radius: 8px;
}
#botbar button:hover { border-color: var(--green); color: #fff; }
#hintbtn.nudge { border-color: var(--amber); color: var(--amber); animation: hintnudge 1.5s ease 2; }
@keyframes hintnudge {
  0%, 100% { box-shadow: 0 0 0 rgba(255,180,84,0); transform: translateY(0); }
  50% { box-shadow: 0 0 16px rgba(255,180,84,.75); transform: translateY(-2px); }
}
.back { margin-left: auto; color: var(--blue); text-decoration: none; font-size: 12.5px; }
.back:hover { text-decoration: underline; }
.tipline { width: 100%; color: var(--dim); font-size: 11.5px; }
.tipline code { color: var(--amber); }

/* win screen */
.hidden { display: none !important; }
#win {
  position: fixed; inset: 0; z-index: 100; display: flex; align-items: center; justify-content: center;
  background: rgba(3,6,4,.85); backdrop-filter: blur(4px);
}
.win-card {
  text-align: center; background: var(--panel2); border: 1px solid var(--green);
  border-radius: 16px; padding: 40px 48px; box-shadow: 0 0 60px rgba(57,211,83,.4);
}
.win-crown { font-size: 64px; color: var(--amber); text-shadow: 0 0 30px var(--amber); animation: bob 2s ease-in-out infinite; }
.win-card h1 { color: var(--green); margin: 8px 0; }
.win-card p { color: var(--fg); margin: 6px 0; }
.win-xp b { color: var(--amber); }
#playagain {
  margin: 18px 8px 6px; font-family: var(--mono); cursor: pointer; background: var(--green);
  color: #06210f; border: 0; padding: 10px 22px; border-radius: 9px; font-weight: 700; font-size: 14px;
}
.flash { animation: flash .6s ease; }
@keyframes flash { 0%{ background: rgba(57,211,83,.25); } 100%{ background: transparent; } }

/* ============================ mobile / touch ============================ */
@media (max-width: 760px) {
  body { padding: 0; }
  #crt { border-radius: 0; border-left: 0; border-right: 0; min-height: 100vh; }
  /* terminal first on phones: you play by typing, so put the console up top
     and the room art + map below it */
  #stage { grid-template-columns: 1fr; }
  #console { order: 1; min-height: 0; }
  #room { order: 2; border-right: 0; border-top: 1px solid var(--border); }
  #screen { max-height: 46vh; }
  /* 16px input stops iOS from auto-zooming the page on focus */
  #cmd, #ps1 { font-size: 16px; }
  #topbar { flex-wrap: wrap; gap: 8px 14px; padding: 12px 14px; }
  .logo { font-size: 17px; }
  .stats { font-size: 12px; gap: 9px; }
  .xpbar { width: 90px; }
  #quest { padding: 12px 14px; }
  #quest h2 { font-size: 16px; }
  #room, #console { padding: 14px; }
  /* comfortable touch targets */
  #botbar { gap: 8px; padding: 12px 14px; }
  #botbar button { padding: 11px 16px; font-size: 13.5px; min-height: 44px; }
  .back { min-height: 44px; display: inline-flex; align-items: center; }
  #bit { padding: 12px 14px; }
}
@media (max-width: 420px) {
  .logo small { display: none; }
  .inv { width: 100%; }
  .tipline { font-size: 11px; }
}