/* ── TOWER DEFENSE ── */
  .game-header {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 20px;
  }
  .game-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 20px; font-weight: 900; letter-spacing: 4px;
    color: var(--neon-cyan);
  }
  .game-title span { color: var(--neon-purple); }
  .game-stats {
    display: flex; gap: 20px;
  }
  .stat-box {
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    padding: 8px 16px;
    clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 8px 100%, 0 calc(100% - 8px));
    text-align: center;
    min-width: 80px;
  }
  .stat-label {
    font-size: 9px; letter-spacing: 2px;
    color: var(--text-dim); text-transform: uppercase;
  }
  .stat-val {
    font-family: 'Orbitron', sans-serif;
    font-size: 18px; font-weight: 700;
  }
  .stat-val.cyan { color: var(--neon-cyan); }
  .stat-val.pink { color: var(--neon-pink); }
  .stat-val.green { color: var(--neon-green); }
  .stat-val.purple { color: var(--neon-purple); }

  .game-area {
    display: grid;
    grid-template-columns: 1fr 220px;
    gap: 16px;
  }

  /* CANVAS */
  #tdCanvas {
    display: block;
    width: 100%;
    height: auto;
    border: 1px solid var(--panel-border);
    box-shadow: 0 0 30px rgba(0,245,255,0.1), inset 0 0 60px rgba(0,0,0,0.5);
    background: #020810;
  }

  /* SIDEBAR */
  .sidebar {
    display: flex; flex-direction: column; gap: 12px;
  }
  .panel {
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    padding: 14px;
    clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
  }
  .panel-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 10px; letter-spacing: 3px;
    color: var(--neon-cyan); margin-bottom: 10px;
    padding-bottom: 8px;
    border-bottom: 1px solid rgba(0,245,255,0.15);
  }

  .tower-grid {
    display: grid; grid-template-columns: 1fr 1fr; gap: 8px;
  }
  .tower-btn {
    background: rgba(0,20,40,0.6);
    border: 1px solid rgba(0,245,255,0.15);
    color: var(--text-bright);
    padding: 10px 6px;
    cursor: pointer;
    transition: all 0.2s;
    text-align: center;
    clip-path: polygon(0 0, calc(100% - 6px) 0, 100% 6px, 100% 100%, 6px 100%, 0 calc(100% - 6px));
    position: relative;
  }
  .tower-btn:hover, .tower-btn.selected {
    border-color: var(--neon-cyan);
    background: rgba(0,245,255,0.1);
    box-shadow: 0 0 15px rgba(0,245,255,0.2);
  }
  .tower-icon { font-size: 20px; display: block; margin-bottom: 3px; }
  .tower-name {
    font-family: 'Orbitron', sans-serif;
    font-size: 8px; letter-spacing: 1px; display: block;
  }
  .tower-cost {
    font-size: 10px; color: var(--neon-green);
    font-family: 'Orbitron', sans-serif;
  }

  .wave-btn {
    width: 100%;
    background: linear-gradient(135deg, rgba(0,245,255,0.1), rgba(0,136,255,0.15));
    border: 1px solid var(--neon-cyan);
    color: var(--neon-cyan);
    font-family: 'Orbitron', sans-serif;
    font-size: 11px; letter-spacing: 3px;
    padding: 12px;
    cursor: pointer;
    transition: all 0.2s;
    clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  }
  .wave-btn:hover {
    background: linear-gradient(135deg, rgba(0,245,255,0.2), rgba(0,136,255,0.3));
    box-shadow: 0 0 20px rgba(0,245,255,0.3);
    transform: scale(1.02);
  }
  .wave-btn:disabled {
    opacity: 0.4; cursor: not-allowed; transform: none;
  }

  .speed-btns { display: flex; gap: 6px; }
  .speed-btn {
    flex: 1;
    background: rgba(0,20,40,0.6);
    border: 1px solid rgba(0,245,255,0.15);
    color: var(--text-dim);
    font-family: 'Orbitron', sans-serif;
    font-size: 10px;
    padding: 6px;
    cursor: pointer; transition: all 0.2s;
  }
  .speed-btn.active {
    border-color: var(--neon-cyan); color: var(--neon-cyan);
    background: rgba(0,245,255,0.1);
  }

  .log-box {
    height: 120px; overflow-y: auto;
    font-size: 11px; line-height: 1.7;
    color: var(--text-dim);
  }
  .log-box::-webkit-scrollbar { width: 4px; }
  .log-box::-webkit-scrollbar-track { background: transparent; }
  .log-box::-webkit-scrollbar-thumb { background: rgba(0,245,255,0.3); border-radius: 2px; }
  .log-entry { border-bottom: 1px solid rgba(255,255,255,0.04); padding: 2px 0; }
  .log-entry.good { color: var(--neon-green); }
  .log-entry.bad  { color: var(--neon-pink); }
  .log-entry.info { color: var(--neon-cyan); }

  /* OVERLAY */
  .overlay {
    display: none; position: absolute; inset: 0;
    background: rgba(2,8,16,0.92);
    align-items: center; justify-content: center;
    flex-direction: column; gap: 20px;
    z-index: 100;
    border: 1px solid var(--panel-border);
  }
  .overlay.show { display: flex; }
  .overlay-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 32px; font-weight: 900; letter-spacing: 6px;
  }
  .overlay-title.win { color: var(--neon-green); text-shadow: 0 0 30px rgba(0,255,136,0.5); }
  .overlay-title.lose { color: var(--neon-pink); text-shadow: 0 0 30px rgba(255,0,136,0.5); }
  .overlay-sub {
    font-size: 14px; letter-spacing: 3px; color: var(--text-dim);
  }
  .overlay-btn {
    background: linear-gradient(135deg, rgba(0,245,255,0.15), rgba(0,136,255,0.2));
    border: 1px solid var(--neon-cyan);
    color: var(--neon-cyan);
    font-family: 'Orbitron', sans-serif;
    font-size: 13px; letter-spacing: 4px;
    padding: 14px 36px;
    cursor: pointer; transition: all 0.2s;
    clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
  }
  .overlay-btn:hover {
    background: linear-gradient(135deg, rgba(0,245,255,0.25), rgba(0,136,255,0.3));
    box-shadow: 0 0 30px rgba(0,245,255,0.3);
  }

  .stat-val.gold { color: gold; }
  .canvas-wrap { position: relative; }
  .tower-preview { display: block; margin: 0 auto 3px; }
  .place-hint { margin-top:10px; font-size:10px; color:var(--text-dim); letter-spacing:1px; text-align:center; }
  .wave-section { margin-top: 10px; }
  .panel-title.speed { margin-bottom: 6px; }
  .panel.flex { flex: 1; }
  .rts-enemy-color { color: #ff4444; }
  .rts-hp-color { color: #00ff88; }
  .rts-build-hint { font-size:10px; color:rgba(0,245,255,0.5); }

  /* ── TD RESPONSIVE ── */
  @media (max-width: 900px) {
    .game-area { grid-template-columns: 1fr; }
    .sidebar { flex-direction: row; flex-wrap: wrap; gap: 8px; }
    .sidebar .panel { flex: 1; min-width: 180px; }
    .game-header { flex-direction: column; gap: 10px; }
    .game-stats { justify-content: center; }
  }
  @media (max-width: 600px) {
    .game-stats { gap: 8px; flex-wrap: wrap; justify-content: center; }
    .stat-box { min-width: 60px; padding: 6px 10px; }
    .stat-val { font-size: 14px; }
    .game-title { font-size: 16px; letter-spacing: 2px; }
    .tower-grid { grid-template-columns: 1fr 1fr 1fr 1fr; }
    .sidebar { flex-direction: column; }
    .sidebar .panel { min-width: unset; }
  }
  /* Landscape mobile: side-by-side layout, constrain canvas to viewport height */
  @media (max-height: 500px) and (orientation: landscape) {
    .game-area { grid-template-columns: 1fr 200px; }
    #tdCanvas { max-height: 60vh; width: auto; max-width: 100%; }
    .game-header { flex-direction: row; margin-bottom: 8px; }
    .game-header .game-title { font-size: 14px; }
    .stat-box { padding: 4px 10px; }
    .stat-val { font-size: 14px; }
    .stat-label { font-size: 8px; }
    .sidebar { flex-direction: column; gap: 6px; max-height: 60vh; overflow-y: auto; }
    .sidebar .panel { padding: 8px 10px; }
    .panel-title { font-size: 9px; margin-bottom: 6px; padding-bottom: 4px; }
    .tower-grid { grid-template-columns: 1fr 1fr; gap: 4px; }
    .tower-btn { padding: 6px 4px; }
    .tower-icon { font-size: 16px; }
    .tower-name { font-size: 7px; }
    .wave-btn { padding: 8px; font-size: 9px; }
    .log-box { height: 60px; }
  }