/* style.css — Tide & Tower */
:root{
  --bg:#0a1622; --bg2:#0d1c2e; --panel:#15263a; --panel2:#1e3450; --line:#2a4366;
  --gold:#f4c95d; --gold-d:#c89a3a; --red:#d2433a; --green:#5fb86b; --blue:#5aa9e6;
  --text:#e8edf2; --muted:#8aa0b8; --water:#1a3a52;
  --shadow:0 6px 20px rgba(0,0,0,.35);
  --display:'Georgia','Times New Roman',serif;
  color-scheme:dark;
}
@media (prefers-color-scheme: light){
  :root{
    --bg:#e9e3d2; --bg2:#ddd5be; --panel:#fbf6e8; --panel2:#f0e8d0; --line:#cdbf99;
    --gold:#b8862a; --gold-d:#8a6418; --red:#b8392f; --green:#3f8f4d; --blue:#2f6fa8;
    --text:#2a2418; --muted:#6b6450; --water:#9bb8c8;
    --shadow:0 6px 18px rgba(60,50,30,.18);
    color-scheme:light;
  }
}
html[data-theme="light"]{
  --bg:#e9e3d2; --bg2:#ddd5be; --panel:#fbf6e8; --panel2:#f0e8d0; --line:#cdbf99;
  --gold:#b8862a; --gold-d:#8a6418; --red:#b8392f; --green:#3f8f4d; --blue:#2f6fa8;
  --text:#2a2418; --muted:#6b6450; --water:#9bb8c8;
  --shadow:0 6px 18px rgba(60,50,30,.18);
  color-scheme:light;
}
html[data-theme="dark"]{color-scheme:dark;}

*{box-sizing:border-box;}
html,body{margin:0;padding:0;height:100%;}
body{
  background:linear-gradient(180deg,var(--bg),var(--bg2));
  color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  overflow:hidden; touch-action:manipulation; -webkit-tap-highlight-color:transparent;
}
#app{display:flex;flex-direction:column;height:100%;max-width:1100px;margin:0 auto;position:relative;}

/* HUD */
#hud{
  display:flex;align-items:center;justify-content:space-between;gap:8px;
  padding:8px 10px;background:var(--panel);border-bottom:1px solid var(--line);
  flex-wrap:wrap;
}
.hud-left,.hud-right{display:flex;align-items:center;gap:8px;flex-wrap:wrap;}
.stat{display:flex;align-items:center;gap:5px;font-weight:700;font-size:14px;
  background:var(--panel2);padding:5px 9px;border-radius:8px;border:1px solid var(--line);min-width:0;}
.stat .lbl{color:var(--muted);font-weight:600;font-size:11px;text-transform:uppercase;letter-spacing:.05em;}
.ic{width:18px;height:18px;display:block;}
.chip{
  background:var(--panel2);color:var(--text);border:1px solid var(--line);
  padding:6px 12px;border-radius:8px;font-weight:700;font-size:13px;cursor:pointer;
  transition:transform .1s, background .15s;
}
.chip:hover{background:var(--line);}
.chip:active{transform:scale(.96);}

.speed{display:flex;align-items:center;gap:6px;background:var(--panel2);padding:5px 10px;border-radius:8px;border:1px solid var(--line);}
.speed .lbl{color:var(--muted);font-size:11px;text-transform:uppercase;letter-spacing:.05em;font-weight:600;}
#speed{width:90px;accent-color:var(--gold);}
.speed-v{font-weight:800;color:var(--gold);min-width:24px;text-align:center;}

.powers{display:flex;gap:6px;}
.pw{
  position:relative;display:flex;align-items:center;gap:6px;
  background:var(--panel2);border:1px solid var(--line);color:var(--text);
  padding:6px 10px;border-radius:8px;font-size:12px;font-weight:700;cursor:pointer;
  transition:transform .1s, background .15s, border-color .15s;
}
.pw:hover{background:var(--line);}
.pw:active{transform:scale(.95);}
.pw .pw-dot{width:9px;height:9px;border-radius:50%;display:inline-block;}
.pw.cd{opacity:.5;cursor:not-allowed;}
.pw .cd-ov{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:800;color:var(--text);background:rgba(10,22,34,.7);border-radius:8px;}
.pw .cd-ov:empty{display:none;}

/* Stage */
#stage{flex:1;position:relative;display:flex;align-items:center;justify-content:center;
  background:radial-gradient(120% 100% at 50% 0%, rgba(90,169,230,.06), transparent 60%);
  min-height:0;overflow:hidden;}
#game{
  max-width:100%;max-height:100%;aspect-ratio:768/512;
  border-radius:10px;border:1px solid var(--line);box-shadow:var(--shadow);
  background:#1a3a52;touch-action:none;display:block;
}
.start-btn{
  position:absolute;left:50%;bottom:14px;transform:translateX(-50%);
  background:linear-gradient(180deg,var(--gold),var(--gold-d));color:#231a06;
  border:none;padding:12px 26px;border-radius:10px;font-weight:800;font-size:15px;
  letter-spacing:.03em;cursor:pointer;box-shadow:0 4px 14px rgba(244,201,93,.35);
  transition:transform .1s;
}
.start-btn:hover{transform:translateX(-50%) scale(1.04);}
.start-btn:active{transform:translateX(-50%) scale(.97);}

.toast{
  position:absolute;top:12px;left:50%;transform:translateX(-50%) translateY(-10px);
  background:rgba(210,67,58,.95);color:#fff;padding:8px 16px;border-radius:8px;
  font-weight:700;font-size:13px;opacity:0;pointer-events:none;transition:opacity .2s, transform .2s;
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0);}

/* Shop */
#shop{
  display:flex;align-items:stretch;gap:10px;padding:8px 10px;
  background:var(--panel);border-top:1px solid var(--line);min-height:84px;
}
.shop-towers{display:flex;gap:8px;flex-wrap:wrap;flex:1;}
.tbtn{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  width:78px;background:var(--panel2);border:2px solid var(--line);color:var(--text);
  border-radius:10px;padding:6px 4px;cursor:pointer;transition:transform .1s, border-color .15s, background .15s;
}
.tbtn:hover{border-color:var(--gold);}
.tbtn.sel{border-color:var(--gold);background:rgba(244,201,93,.12);}
.tbtn.locked{opacity:.45;cursor:not-allowed;}
.tbtn.poor{opacity:.7;}
.tbtn:active{transform:scale(.95);}
.tbtn-ic{width:34px;height:34px;display:flex;align-items:center;justify-content:center;}
.tbtn-ic img{width:34px;height:34px;object-fit:contain;image-rendering:auto;}
.tbtn-name{font-size:11px;font-weight:700;line-height:1.1;text-align:center;}
.tbtn-cost{font-size:11px;color:var(--gold);font-weight:800;}
.tbtn.locked .tbtn-cost{color:var(--muted);}

#tower-panel{
  width:230px;background:var(--panel2);border:1px solid var(--line);border-radius:10px;
  padding:8px 10px;display:none;flex-shrink:0;
}
.tp-name{font-weight:800;font-size:14px;display:flex;justify-content:space-between;align-items:center;}
.tp-lv{color:var(--gold);font-size:12px;}
.tp-stats{display:flex;gap:8px;margin-top:6px;font-size:11px;color:var(--muted);font-weight:600;}
.tp-desc{font-size:11px;color:var(--muted);margin-top:4px;line-height:1.3;}
.tp-btns{display:flex;gap:6px;margin-top:8px;}
.tp-btns button{
  flex:1;background:var(--panel);border:1px solid var(--line);color:var(--text);
  padding:7px 4px;border-radius:7px;font-weight:700;font-size:11px;cursor:pointer;
  transition:background .15s, transform .1s;
}
.tp-btns button:hover:not(:disabled){background:var(--line);}
.tp-btns button:active:not(:disabled){transform:scale(.96);}
.tp-btns button:disabled{opacity:.45;cursor:not-allowed;}
#tp-up{color:var(--gold);}
#tp-sell{color:var(--red);}

/* Menu */
#menu{
  position:absolute;inset:0;display:none;flex-direction:column;
  background:linear-gradient(180deg,var(--bg),var(--bg2));
  z-index:5;overflow:auto;
}
.menu-inner{max-width:760px;margin:0 auto;padding:28px 18px 40px;text-align:center;}
.title{
  font-family:var(--display);font-weight:700;font-size:54px;margin:6px 0 2px;
  color:var(--gold);letter-spacing:.04em;
  text-shadow:0 2px 0 rgba(0,0,0,.35), 0 0 22px rgba(244,201,93,.25);
}
.sub{color:var(--muted);margin:0 0 18px;font-size:15px;}
.primary{
  background:linear-gradient(180deg,var(--gold),var(--gold-d));color:#231a06;
  border:none;padding:12px 28px;border-radius:10px;font-weight:800;font-size:15px;
  cursor:pointer;box-shadow:0 4px 14px rgba(244,201,93,.3);transition:transform .1s;
}
.primary:hover{transform:scale(1.03);}
.primary:active{transform:scale(.97);}
.level-grid-wrap{margin:20px 0 10px;max-height:52vh;overflow:auto;border:1px solid var(--line);border-radius:12px;background:var(--panel);padding:12px;}
.level-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(48px,1fr));gap:8px;}
.lvl{
  aspect-ratio:1;background:var(--panel2);border:1px solid var(--line);color:var(--text);
  border-radius:8px;font-weight:800;font-size:15px;cursor:pointer;display:flex;align-items:center;justify-content:center;
  transition:transform .1s, background .15s, border-color .15s;
}
.lvl:hover:not(.locked){background:var(--line);transform:scale(1.05);}
.lvl:active:not(.locked){transform:scale(.95);}
.lvl.locked{opacity:.5;color:var(--muted);cursor:not-allowed;}
.lvl.locked .lock{width:18px;height:18px;}
.hint{color:var(--muted);font-size:13px;margin-top:8px;}

/* Overlay */
#overlay{
  position:absolute;inset:0;display:none;align-items:center;justify-content:center;
  background:rgba(6,14,22,.78);backdrop-filter:blur(3px);z-index:20;padding:20px;
}
.card{
  background:var(--panel);border:1px solid var(--line);border-radius:16px;
  padding:26px 28px;max-width:420px;text-align:center;box-shadow:var(--shadow);
}
.card h2{font-family:var(--display);font-weight:700;color:var(--gold);font-size:32px;margin:0 0 8px;letter-spacing:.03em;}
.card p{margin:6px 0;color:var(--text);}
.card .big{font-size:20px;font-weight:800;color:var(--gold);}
.card .row{display:flex;gap:10px;justify-content:center;margin-top:16px;flex-wrap:wrap;}
.card .row button{
  background:var(--panel2);border:1px solid var(--line);color:var(--text);
  padding:10px 20px;border-radius:9px;font-weight:700;cursor:pointer;transition:transform .1s, background .15s;
}
.card .row button:hover{background:var(--line);}
.card .row button:active{transform:scale(.96);}
.card .row button.primary{background:linear-gradient(180deg,var(--gold),var(--gold-d));color:#231a06;border:none;}
.help{text-align:left;color:var(--text);font-size:13px;line-height:1.6;padding-left:18px;margin:14px 0;}
.help li{margin-bottom:6px;}
.help b{color:var(--gold);}

/* Responsive */
@media (max-width:560px){
  .hide-sm{display:none;}
  .title{font-size:40px;}
  .pw .pw-name{display:none;}
  .pw{padding:8px 10px;}
  #tower-panel{width:100%;}
  #shop{flex-direction:column;}
  .tbtn{width:64px;}
  .tbtn-ic img{width:28px;height:28px;}
  .tbtn-ic{width:28px;height:28px;}
}
@media (max-width:380px){
  .stat{padding:4px 7px;font-size:12px;}
  .speed #speed{width:70px;}
}