:root {
  --bg: #070a18;
  --bg2: #0b1026;
  --panel: #11172f;
  --panel-border: #26305a;
  --text: #e8ecf8;
  --muted: #9aa5c7;
  --green: #39d353;
  --green-dark: #238636;
  --accent: #7ee787;
  --danger: #ff6b6b;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
}

body {
  background:
    radial-gradient(1000px 500px at 50% -10%, #16204a 0%, transparent 60%),
    linear-gradient(180deg, var(--bg2), var(--bg));
  color: var(--text);
  font-family: "Segoe UI", system-ui, -apple-system, Arial, sans-serif;
  min-height: 100vh;
}

.page {
  max-width: 880px;
  margin: 0 auto;
  padding: 18px 14px 28px;
}

/* header */
.topbar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
}

.brand { display: flex; align-items: center; gap: 12px; }
.brand-icon { font-size: 42px; line-height: 1; }
.brand h1 {
  margin: 0;
  font-size: 30px;
  letter-spacing: 1px;
  text-transform: uppercase;
}
.tagline { margin: 2px 0 0; color: var(--muted); font-size: 14px; }

.top-actions { display: flex; gap: 8px; flex-wrap: wrap; }

.chip-btn {
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--panel-border);
  border-radius: 999px;
  padding: 7px 14px;
  font-size: 14px;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
}
.chip-btn:hover { border-color: var(--green); }

/* HUD */
.hud {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin: 16px 0 12px;
}
.hud-item {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  padding: 8px 14px;
  display: flex;
  flex-direction: column;
}
.hud-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--muted);
}
.hud-item strong { font-size: 22px; margin-top: 2px; }
#hudLives { font-size: 17px; letter-spacing: 2px; padding-top: 4px; }

/* stage */
.stage-wrap {
  position: relative;
  border: 1px solid var(--panel-border);
  border-radius: 14px;
  overflow: hidden;
  background: #05070f;
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.55);
}

canvas#game {
  display: block;
  width: 100%;
  height: auto;
  touch-action: none;
}

/* overlays */
.overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(4, 6, 16, 0.78);
  padding: 16px;
  z-index: 3;
}
.hidden { display: none !important; }

.panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  padding: 26px 28px;
  max-width: 480px;
  width: 100%;
  text-align: center;
  max-height: 100%;
  overflow-y: auto;
}
.panel-emoji { font-size: 44px; }
.panel h2 { margin: 8px 0 10px; font-size: 28px; letter-spacing: 0.5px; }
.panel-text { color: var(--muted); line-height: 1.55; margin: 0 0 18px; }
.panel-note { color: var(--muted); font-size: 13px; margin: 12px 0 0; }

.big-btn {
  background: var(--green-dark);
  border: 1px solid var(--green);
  color: #fff;
  font-size: 19px;
  font-weight: 600;
  padding: 12px 34px;
  border-radius: 999px;
  cursor: pointer;
}
.big-btn:hover, .big-btn:focus-visible { background: var(--green); color: #06130a; }
.chip-btn:focus-visible, .touch-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.controls-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 14px;
  margin-top: 20px;
  text-align: left;
  font-size: 14px;
  color: var(--muted);
}
.controls-grid span { display: block; margin-top: 3px; }

kbd {
  background: #1c2447;
  border: 1px solid #39477c;
  border-bottom-width: 2px;
  border-radius: 5px;
  padding: 1px 6px;
  font-family: inherit;
  font-size: 12.5px;
  color: var(--text);
  margin-right: 3px;
  display: inline-block;
}

/* touch controls */
.touch-controls {
  display: none;
  justify-content: space-between;
  gap: 12px;
  margin-top: 12px;
}
.touch-btn {
  flex: 1;
  padding: 16px 0;
  font-size: 20px;
  border-radius: 14px;
  border: 1px solid var(--panel-border);
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}
.touch-fire {
  background: var(--green-dark);
  border-color: var(--green);
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
}
.touch-btn:active { filter: brightness(1.35); }

@media (pointer: coarse) {
  .touch-controls { display: flex; }
}

.footer { color: var(--muted); font-size: 13.5px; line-height: 1.6; margin-top: 18px; text-align: center; }
.footer code { color: var(--accent); }

@media (max-width: 560px) {
  .brand h1 { font-size: 23px; }
  .brand-icon { font-size: 32px; }
  .hud-item strong { font-size: 18px; }
  .hud { grid-template-columns: repeat(2, 1fr); }
  .controls-grid { grid-template-columns: 1fr; }
  .panel { padding: 20px 16px; }
}