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

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #16110d;
  font-family: 'Courier New', monospace;
  color: #e7dcc9;
}

#game-root {
  position: fixed;
  inset: 0;
  overflow: hidden;
}

#mine {
  display: block;
  width: 100%;
  height: 100%;
  image-rendering: pixelated;
}

.hidden { display: none !important; }

/* ---- HUD ---- */
#hud {
  position: absolute;
  top: 0.9rem;
  left: 0.9rem;
  background: rgba(20, 14, 10, 0.72);
  border: 2px solid #5a3d28;
  border-radius: 6px;
  padding: 0.5rem 0.8rem;
  font-size: 0.95rem;
  letter-spacing: 1px;
  line-height: 1.5;
  text-shadow: 0 1px 2px #000;
  pointer-events: none;
}
.hud-row { display: flex; align-items: baseline; gap: 0.4rem; }
.hud-label { color: #a8895f; font-size: 0.72rem; min-width: 3.2rem; }
#depth-val, #dug-val { color: #e8b25a; font-weight: bold; font-size: 1.1rem; }
.hud-unit { color: #8a6a45; font-size: 0.7rem; }

/* ---- Legend ---- */
#legend {
  position: absolute;
  bottom: 0.9rem;
  left: 0.9rem;
  background: rgba(20, 14, 10, 0.72);
  border: 2px solid #4a3320;
  border-radius: 6px;
  padding: 0.6rem 0.8rem;
  font-size: 0.8rem;
  line-height: 1.55;
  max-width: 20rem;
  text-shadow: 0 1px 2px #000;
  pointer-events: none;
}
.leg-title { color: #e8b25a; letter-spacing: 2px; margin-bottom: 0.3rem; font-size: 0.8rem; }
.leg-line b { color: #cf9d63; }
.leg-hint { margin-top: 0.35rem; color: #8a7a63; font-size: 0.72rem; font-style: italic; }

/* ---- Menu ---- */
#menu {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(circle at 50% 30%, rgba(60, 40, 26, 0.55), transparent 60%),
    linear-gradient(180deg, #2a2018 0%, #17100b 100%);
  z-index: 10;
}
.menu-panel {
  text-align: center;
  padding: 2.4rem 3rem;
  border: 3px solid #5a3d28;
  border-radius: 12px;
  background: rgba(24, 17, 11, 0.85);
  box-shadow: 0 0 40px rgba(0,0,0,0.6), inset 0 0 30px rgba(0,0,0,0.4);
}
.menu-title {
  font-size: clamp(2.4rem, 8vw, 4.5rem);
  letter-spacing: 0.5rem;
  color: #e8b25a;
  text-shadow: 0 3px 0 #7a2418, 0 5px 8px rgba(0,0,0,0.6);
}
.menu-sub {
  margin-top: 0.3rem;
  color: #9d8763;
  letter-spacing: 3px;
  font-size: clamp(0.8rem, 2.5vw, 1.1rem);
}
.menu-art { font-size: clamp(3rem, 10vw, 5rem); margin: 1rem 0 1.4rem; }
#play-btn {
  font-family: inherit;
  font-size: 1.4rem;
  letter-spacing: 4px;
  padding: 0.7rem 2.8rem;
  color: #1a120c;
  background: linear-gradient(180deg, #e8b25a, #c98a3a);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-weight: bold;
  box-shadow: 0 4px 0 #7a4d1e, 0 6px 12px rgba(0,0,0,0.5);
  transition: transform 0.08s ease, box-shadow 0.08s ease;
}
#play-btn:hover { transform: translateY(-2px); box-shadow: 0 6px 0 #7a4d1e, 0 9px 16px rgba(0,0,0,0.55); }
#play-btn:active { transform: translateY(2px); box-shadow: 0 2px 0 #7a4d1e; }
.menu-controls {
  margin-top: 1.6rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.1rem;
  justify-content: center;
  color: #8a7a63;
  font-size: 0.8rem;
}
.menu-controls b { color: #cf9d63; }