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

body {
  background: #111;
  overflow: hidden;
  height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}

/* ── Upper: game canvas fills remaining height ─────────────────────────────── */
#game-area {
  flex: 1;
  min-height: 0;          /* allow flex child to shrink below its content size */
  position: relative;
  overflow: hidden;
  background: #0a0a18;
}

#game-canvas {
  display: block;
  width: 100%;
  height: 100%;
}

/* ── Lower: controller panel ───────────────────────────────────────────────── */
/* "below part smaller than the upper" — uses clamp so it feels right on all
   phone sizes without being uncomfortably small or excessively large.           */
#controller {
  height: clamp(180px, 38vh, 260px);
  flex-shrink: 0;
  background: #1c1c1c;
  border-top: 2px solid #333;
  border-radius: 14px 14px 0 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
}

/* ── D-pad ─────────────────────────────────────────────────────────────────── */
#dpad-area {
  display: flex;
  align-items: center;
  justify-content: center;
}

/* 3×3 grid — only the cross cells are buttons, corners are empty spacers */
#dpad {
  display: grid;
  grid-template-columns: repeat(3, 48px);
  grid-template-rows: repeat(3, 48px);
  gap: 0;
}

.dpad-empty {
  background: transparent;
}

.dpad-btn {
  background: #2e2e2e;
  border: 2px solid #444;
  color: #aaa;
  font-size: 14px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  touch-action: none;
  transition: background 0.06s, color 0.06s;
}

/* Round the outer edges of each arm to form the cross shape */
#btn-up    { border-radius: 6px 6px 0 0; }
#btn-left  { border-radius: 6px 0 0 6px; }
#btn-right { border-radius: 0 6px 6px 0; }
#btn-down  { border-radius: 0 0 6px 6px; }

/* Centre cap — purely decorative, not interactive */
#dpad-center {
  background: #282828;
  border: 2px solid #444;
}

.dpad-btn.pressed,
.dpad-btn:active {
  background: #555;
  color: #fff;
}

/* ── Middle: Select / Start ────────────────────────────────────────────────── */
#system-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.sys-btn {
  background: #2a2a2a;
  border: 1px solid #555;
  color: #666;
  font-family: inherit;
  font-size: 9px;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 5px 13px;
  border-radius: 10px;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  touch-action: none;
  transition: background 0.06s;
}

.sys-btn:active,
.sys-btn.pressed {
  background: #444;
  color: #aaa;
}

/* ── Action buttons: A (top-right) and B (bottom-left) ────────────────────── */
#action-area {
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Container sized so the two 52 px circles can sit in a diagonal arrangement */
#action-btns {
  position: relative;
  width: 112px;
  height: 92px;
}

.action-btn {
  position: absolute;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: none;
  font-family: inherit;
  font-size: 1rem;
  font-weight: bold;
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  -webkit-tap-highlight-color: transparent;
  touch-action: none;
  transition: filter 0.06s;
}

/* A — top-right, slightly higher. Shoot button. */
#btn-a {
  background: #bb2244;
  box-shadow: 0 5px 0 #771122;
  right: 0;
  top: 0;
}

/* B — bottom-left. Jump button. */
#btn-b {
  background: #993322;
  box-shadow: 0 5px 0 #551100;
  left: 0;
  bottom: 0;
}

.action-btn.pressed,
.action-btn:active {
  filter: brightness(1.3);
  box-shadow: none !important;
  transform: translateY(3px);
}

/* ── Cell tooltip ──────────────────────────────────────────────────────────── */
/* Small floating box that appears near the cursor showing the hovered cell number */
#cell-tooltip {
  position: absolute;
  display: none;
  background: #12122a;
  border: 1px solid #2a2a5a;
  border-radius: 6px;
  padding: 6px 12px;
  pointer-events: none;
  z-index: 50;
  box-shadow: 0 0 14px #2a2a5a88;
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
  font-size: 18px;
  font-weight: bold;
  color: #9090cc;
  white-space: nowrap;
}

/* ── Desktop warning overlay ───────────────────────────────────────────────── */
#desktop-warning {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(10, 10, 10, 0.92);
  z-index: 400;
  align-items: center;
  justify-content: center;
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
}

#desktop-warning.visible {
  display: flex;
}

.desktop-frame {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 1rem;
  padding: 2.5rem 2rem;
  width: calc(100% - 48px);
  max-width: 360px;
  background: #111;
  border: 2px solid #bb2244;
  border-radius: 12px;
  box-shadow: 0 0 40px rgba(187, 34, 68, 0.15);
}

.desktop-frame h2 {
  font-size: 1.4rem;
  color: #bb2244;
  letter-spacing: 4px;
  text-shadow: 0 0 16px #bb224488;
}

.desktop-frame p {
  color: #8888cc;
  font-size: 0.88rem;
  letter-spacing: 1px;
  line-height: 1.6;
}

#warning-dismiss {
  margin-top: 0.5rem;
  padding: 0.5rem 1.4rem;
  font-family: inherit;
  font-size: 0.85rem;
  letter-spacing: 2px;
  color: #fff;
  background: #bb2244;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  text-transform: uppercase;
  font-weight: bold;
  transition: opacity 0.15s;
}

#warning-dismiss:hover {
  opacity: 0.85;
}

.desktop-frame a {
  color: #555588;
  text-decoration: none;
  font-size: 0.8rem;
  letter-spacing: 2px;
  transition: color 0.15s;
}

.desktop-frame a:hover {
  color: #bb2244;
}