* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg0: #11131c;
  --bg1: #1a1e2e;
  --ink: #d8dcef;
  --dim: #8089a8;
  --red: #e84a3f;
  --yellow: #ffc83d;
}

html, body { height: 100%; }

body {
  background:
    radial-gradient(1200px 700px at 50% -10%, #232a44 0%, var(--bg1) 45%, var(--bg0) 100%);
  color: var(--ink);
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  display: flex;
  justify-content: center;
  min-height: 100%;
  overflow-x: hidden;
  -webkit-user-select: none;
  user-select: none;
}

.stage {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 22px 16px 30px;
  width: 100%;
  max-width: 980px;
}

/* ---------- 标题 ---------- */
.masthead { text-align: center; margin-bottom: 16px; }

.logo {
  font-family: "Courier New", ui-monospace, monospace;
  font-weight: 900;
  font-size: clamp(26px, 4.4vw, 44px);
  letter-spacing: 0.18em;
  line-height: 1;
}
.logo-red {
  color: var(--red);
  text-shadow: 0 3px 0 #7c1f18, 0 6px 14px rgba(232, 74, 63, .35);
}
.logo-yellow {
  color: var(--yellow);
  text-shadow: 0 3px 0 #8a6410, 0 6px 14px rgba(255, 200, 61, .3);
}
.tagline {
  margin-top: 10px;
  color: var(--dim);
  font-size: 13px;
  letter-spacing: 0.35em;
}

/* ---------- 机身 / 屏幕 ---------- */
.bezel {
  background: linear-gradient(180deg, #2c3148 0%, #181c2c 100%);
  border-radius: 18px;
  padding: 14px;
  box-shadow:
    0 24px 60px rgba(0, 0, 0, .55),
    0 2px 0 rgba(255, 255, 255, .07) inset,
    0 -3px 0 rgba(0, 0, 0, .4) inset;
}

.screen-wrap {
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 0 0 3px #05060a, 0 0 34px rgba(92, 148, 252, .22);
  line-height: 0;
}

#game {
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  display: block;
  background: #5c94fc;
}

.scanlines {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    repeating-linear-gradient(0deg,
      rgba(0, 0, 0, 0) 0px, rgba(0, 0, 0, 0) 2px,
      rgba(0, 0, 0, .10) 2px, rgba(0, 0, 0, .10) 3px);
  mix-blend-mode: multiply;
}

/* ---------- 操作说明 ---------- */
.panel { margin-top: 18px; max-width: 720px; text-align: center; }

.ctl-note { font-size: 12.5px; color: var(--dim); margin-bottom: 12px; }
.ctl-note strong { color: var(--ink); }

.controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 22px;
  margin-bottom: 12px;
}
.ctl { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--ink); }
.ctl span { color: var(--dim); }

kbd {
  display: inline-block;
  min-width: 26px;
  padding: 4px 7px;
  text-align: center;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 12px;
  color: #fff;
  background: linear-gradient(180deg, #3a415e, #262b41);
  border: 1px solid #4a5274;
  border-bottom: 3px solid #161a29;
  border-radius: 6px;
  box-shadow: 0 1px 0 rgba(255, 255, 255, .12) inset;
}

.tips { font-size: 12.5px; color: var(--dim); line-height: 1.8; }

.foot {
  margin-top: 22px;
  font-size: 11px;
  letter-spacing: 0.22em;
  color: #565e7c;
}

/* ---------- 触屏按钮 ---------- */
.touch.hidden { display: none; }
.touch {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  display: flex;
  justify-content: space-between;
  padding: 0 18px 22px;
  pointer-events: none;
  z-index: 50;
}
.t-left, .t-right { display: flex; gap: 12px; align-items: flex-end; pointer-events: auto; }
.tbtn {
  width: 58px; height: 58px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, .25);
  background: rgba(40, 46, 70, .55);
  color: #fff;
  font-size: 20px;
  font-weight: 700;
  backdrop-filter: blur(4px);
  touch-action: none;
}
.tbtn.a { background: rgba(232, 74, 63, .55); }
.tbtn.b { background: rgba(255, 200, 61, .45); }
.tbtn:active { transform: scale(.92); }

@media (max-width: 640px) {
  .controls { display: none; }
  .stage { padding-top: 12px; }
}