/* ============================================================
   Monkey Balloon Defense — Styles
   Dark UI with bright accents, clean modern look.
   ============================================================ */
* { box-sizing: border-box; margin: 0; padding: 0; }
:root{
  --bg:#0f1420; --panel:#182031; --panel2:#202a40;
  --accent:#37d67a; --accent2:#ffcf33;
  --danger:#ff5964; --text:#e8edf6; --muted:#8b97ad;
  --border:#2c3854;
}
html,body{ height:100%; }
body{
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: radial-gradient(circle at 30% 10%, #1a2338, #0b0f18 70%);
  color: var(--text);
  overflow: hidden;
  -webkit-user-select: none; user-select: none;
  -webkit-tap-highlight-color: transparent;
}
#game-wrap{ display:flex; flex-direction:column; height:100vh; }

/* ---------- Top bar ---------- */
#topbar{
  display:flex; align-items:center; gap:10px;
  padding:8px 14px; background:var(--panel);
  border-bottom:2px solid var(--border);
  flex-wrap:wrap;
}
.stat{
  display:flex; align-items:center; gap:6px;
  background:var(--panel2); padding:6px 12px; border-radius:10px;
  font-weight:700; font-size:15px; border:1px solid var(--border);
}
.stat .ic{ font-size:16px; }
#money{ color:var(--accent2); }
#lives{ color:#ff6b7a; }
.spacer{ flex:1; }
.speedbtns{ display:flex; gap:4px; }
.spd, .toggle{
  background:var(--panel2); color:var(--text); border:1px solid var(--border);
  padding:7px 11px; border-radius:8px; font-weight:700; cursor:pointer;
  font-size:14px; transition:.15s;
}
.spd:hover,.toggle:hover{ background:#2c3a5a; }
.spd.active{ background:var(--accent); color:#08210f; border-color:var(--accent); }
.toggle.active{ background:var(--accent2); color:#3a2c00; border-color:var(--accent2); }
.start-btn{
  background:var(--accent); color:#07240f; border:none;
  padding:8px 16px; border-radius:9px; font-weight:800; cursor:pointer;
  font-size:15px; transition:.15s;
}
.start-btn:hover{ filter:brightness(1.1); }
.start-btn:disabled{ opacity:.45; cursor:default; }

/* ---------- Main layout ---------- */
#main{ flex:1; display:flex; min-height:0; }
#canvas-holder{ position:relative; flex:1; display:flex; justify-content:center; align-items:center; overflow:hidden; }
canvas{ display:block; background:#4a9b3f; touch-action:none; max-width:100%; max-height:100%; box-shadow:0 0 30px rgba(0,0,0,.4); }
.nextwave{
  position:absolute; top:8px; left:8px; background:rgba(10,14,24,.8);
  padding:6px 12px; border-radius:8px; font-size:13px; color:var(--muted);
  border:1px solid var(--border); max-width:60%; pointer-events:none;
}
.leak-warn{
  position:absolute; bottom:14px; left:50%; transform:translateX(-50%);
  background:rgba(200,30,45,.9); padding:8px 18px; border-radius:10px;
  font-weight:800; font-size:16px; display:none; animation:pulse .7s infinite;
}
@keyframes pulse{ 50%{ opacity:.55; } }

/* ---------- Side panel ---------- */
#side{
  width:280px; background:var(--panel); border-left:2px solid var(--border);
  padding:12px; overflow-y:auto; flex-shrink:0;
}
.panel-title{ font-size:16px; margin-bottom:8px; color:var(--muted); text-transform:uppercase; letter-spacing:1px; }
.tower-list{ display:grid; grid-template-columns:1fr 1fr; gap:8px; }
.tower-btn{
  background:var(--panel2); border:1px solid var(--border); border-radius:10px;
  padding:8px 6px; cursor:pointer; text-align:center; transition:.15s; position:relative;
}
.tower-btn:hover{ background:#2c3a5a; transform:translateY(-2px); }
.tower-btn.selected{ border-color:var(--accent); box-shadow:0 0 0 2px var(--accent) inset; }
.tower-btn.cant{ opacity:.5; }
.tower-btn canvas{ background:transparent; margin:0 auto; display:block; }
.tower-btn .tname{ font-size:11px; font-weight:700; margin-top:2px; }
.tower-btn .tcost{ font-size:11px; color:var(--accent2); font-weight:700; }

/* ---------- Selected tower panel ---------- */
.selected-panel{
  margin-top:14px; padding-top:12px; border-top:1px solid var(--border);
}
.sel-name{ font-size:17px; margin-bottom:6px; color:var(--accent); }
.sel-info{ font-size:12px; color:var(--muted); line-height:1.6; margin-bottom:10px; }
.sel-info b{ color:var(--text); }
.upgrade-block{ margin-bottom:8px; }
.path-label{ font-size:10px; color:var(--muted); text-transform:uppercase; letter-spacing:1px; margin-bottom:3px; }
.upgrade-btn{
  width:100%; text-align:left; background:var(--panel2); color:var(--text);
  border:1px solid var(--border); border-radius:8px; padding:8px 10px; cursor:pointer;
  font-size:12px; transition:.15s; line-height:1.4;
}
.upgrade-btn:hover:not(:disabled){ background:#2c3a5a; }
.upgrade-btn .u-name{ font-weight:700; display:block; }
.upgrade-btn .u-cost{ color:var(--accent2); font-weight:700; }
.upgrade-btn .u-desc{ color:var(--muted); font-size:11px; }
.upgrade-btn:disabled{ opacity:.5; cursor:default; }
.upgrade-btn.maxed{ border-color:var(--accent); color:var(--accent); text-align:center; }
.sel-actions{ display:flex; gap:8px; margin-top:10px; }
.target-btn{
  flex:1; background:var(--panel2); color:var(--text); border:1px solid var(--border);
  border-radius:8px; padding:8px; cursor:pointer; font-weight:700; font-size:12px;
}
.target-btn:hover{ background:#2c3a5a; }
.sell-btn{
  flex:1; background:#5a2130; color:#ff9aa6; border:1px solid #7a2c3c;
  border-radius:8px; padding:8px; cursor:pointer; font-weight:700; font-size:12px;
}
.sell-btn:hover{ background:#722636; }

/* ---------- Overlays ---------- */
.overlay{
  position:fixed; inset:0; background:rgba(6,9,16,.85); backdrop-filter:blur(4px);
  display:flex; justify-content:center; align-items:center; z-index:50;
}
.overlay-card{
  background:var(--panel); border:2px solid var(--border); border-radius:18px;
  padding:32px 40px; max-width:560px; text-align:center; box-shadow:0 20px 60px rgba(0,0,0,.6);
}
.overlay-card h1{ font-size:32px; margin-bottom:12px; color:var(--accent); }
.overlay-card p{ color:var(--muted); margin-bottom:16px; line-height:1.6; }
.ov-scores{ color:var(--accent2); font-weight:700; margin-bottom:18px; font-size:16px; }
.big-btn{
  background:var(--accent); color:#07240f; border:none; padding:14px 40px;
  border-radius:12px; font-weight:800; font-size:18px; cursor:pointer; transition:.15s;
}
.big-btn:hover{ filter:brightness(1.1); transform:scale(1.03); }
.help-card{ text-align:left; max-width:640px; }
.help-card h1,.help-card h2{ color:var(--accent); margin-bottom:10px; }
.help-card h2{ font-size:18px; margin-top:16px; }
.help-list{ list-style:none; }
.help-list li{ padding:5px 0 5px 22px; position:relative; color:var(--text); font-size:14px; line-height:1.5; }
.help-list li:before{ content:"🎈"; position:absolute; left:0; }
.help-list b{ color:var(--accent2); }
.keys{ display:flex; flex-wrap:wrap; gap:10px; margin:10px 0 20px; }
.keys span{ background:var(--panel2); padding:6px 10px; border-radius:8px; font-size:13px; border:1px solid var(--border); }
.keys b{ color:var(--accent2); }
.hidden{ display:none !important; }

@media (max-width:820px){
  #main{ flex-direction:column; }
  #side{ width:100%; height:230px; border-left:none; border-top:2px solid var(--border); }
  .tower-list{ grid-template-columns:repeat(4,1fr); }
}