:root{
  --night-black:#100A1C;
  --night-deep:#1E1233;
  --night-glow:#3B2260;
  --panel:#261943;
  --panel-2:#302152;
  --line:rgba(255,255,255,.09);
  --line-strong:rgba(255,255,255,.2);
  --text:#F6EEFF;
  --muted:#B6A6D8;
  --pink:#FF7EB0;
  --pink-2:#E7508A;
  --gold:#FFD35C;
  --mint:#6EE7C0;
  --leaf:#7FD45A;
  --leaf-2:#3E9B3A;
  --lilac:#B69CFF;
  --display:'Baloo 2', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
  --body:'Quicksand', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
  --mono:'JetBrains Mono', ui-monospace, monospace;
  color-scheme:dark;
}

*{ box-sizing:border-box; }
html,body{ overscroll-behavior:none; }
body{
  margin:0;
  min-height:100vh;
  color:var(--text);
  font-family:var(--body);
  font-weight:600;
  -webkit-font-smoothing:antialiased;
  background:radial-gradient(120% 90% at 50% -10%, var(--night-glow) 0%, var(--night-deep) 45%, var(--night-black) 100%);
  background-attachment:fixed;
  overflow-x:hidden;
  -webkit-tap-highlight-color:transparent;
}
button{ font:inherit; }

/* twinkling stars, purely decorative */
#stars{ position:fixed; inset:0; pointer-events:none; z-index:0; overflow:hidden; }
#stars i{ position:absolute; display:block; border-radius:50%; background:#FFE9C7; opacity:.5; }
@media (prefers-reduced-motion:no-preference){
  #stars i{ animation:twinkle 3.6s ease-in-out infinite; }
}
@keyframes twinkle{ 0%,100%{ opacity:.15; } 50%{ opacity:.75; } }

.site-nav{
  position:relative; z-index:3;
  max-width:960px; margin:0 auto; padding:14px 20px 0;
  display:flex; align-items:center; gap:8px;
}
.site-nav a{
  display:inline-flex; align-items:center; gap:7px;
  text-decoration:none; color:var(--muted);
  font-weight:700; font-size:.82rem;
  background:var(--panel); border:1px solid var(--line);
  border-radius:999px; padding:7px 15px 7px 11px;
  transition:transform .15s ease, color .15s ease, border-color .15s ease;
}
.site-nav a:hover{ transform:translateX(-2px); color:var(--text); border-color:var(--line-strong); }
.site-nav a:focus-visible{ outline:2px solid var(--pink); outline-offset:2px; }
.site-nav svg{ width:14px; height:14px; }

.page{
  position:relative; z-index:1; margin:0 auto; padding:6px 16px 40px;
  /* keep the whole board on screen on wide but short windows */
  max-width:clamp(360px, calc((100vh - 270px) * 1.5 + 32px), 900px);
}

.hero{ text-align:center; margin:6px 0 12px; }
.hero h1{
  font-family:var(--display); font-weight:800;
  font-size:clamp(1.7rem, 5vw, 2.5rem); line-height:1.1; margin:0 0 4px;
  background:linear-gradient(90deg, #FF9FC8, var(--gold) 50%, #9BEA7A);
  -webkit-background-clip:text; background-clip:text; color:transparent;
}
.hero p{ margin:0 auto; max-width:56ch; color:var(--muted); font-size:.92rem; line-height:1.5; }

/* ---------- top bar ---------- */
.hud{ display:flex; align-items:center; gap:8px; margin:0 0 10px; }
.hud .grow{ flex:1; }
.pill{
  color:var(--text);
  display:inline-flex; align-items:center; gap:6px;
  background:var(--panel); border:1px solid var(--line);
  border-radius:999px; padding:6px 14px; font-size:.86rem; white-space:nowrap;
}
.pill b{ font-family:var(--display); font-weight:800; font-size:1rem; font-variant-numeric:tabular-nums; }
.level-pill{ font-family:var(--display); font-weight:800; overflow:hidden; text-overflow:ellipsis; min-width:0; }
button.level-pill{ cursor:pointer; font-size:.86rem; transition:border-color .15s ease, transform .15s ease; }
button.level-pill:hover{ border-color:var(--gold); transform:translateY(-1px); }
button.level-pill:focus-visible{ outline:2px solid var(--gold); outline-offset:2px; }
.level-pill svg{ width:16px; height:16px; flex:none; color:var(--gold); }
.level-pill span{ overflow:hidden; text-overflow:ellipsis; }
.stat .ico{ font-size:1rem; line-height:1; }
.lives .ico{ color:var(--pink); }
.gold .ico{ color:var(--gold); }
.stat.bump{ animation:bump .35s ease; }
.lives.hurt{ animation:hurt .45s ease; }
@keyframes bump{ 40%{ transform:scale(1.12); } }
@keyframes hurt{ 20%{ transform:translateX(-4px); border-color:var(--pink); } 60%{ transform:translateX(4px); } }
@media (prefers-reduced-motion:reduce){ .stat.bump, .lives.hurt{ animation:none; } }

.icon-btn{
  cursor:pointer; width:36px; height:36px; border-radius:50%; flex:none;
  display:inline-flex; align-items:center; justify-content:center;
  color:var(--muted); background:var(--panel); border:1px solid var(--line);
  transition:color .15s ease, border-color .15s ease;
}
.icon-btn:hover{ color:var(--text); border-color:var(--line-strong); }
.icon-btn:focus-visible{ outline:2px solid var(--gold); outline-offset:2px; }
.icon-btn[aria-pressed="true"]{ color:var(--gold); border-color:rgba(255,211,92,.45); }
.icon-btn svg{ width:18px; height:18px; }
.icon-btn b{ font-family:var(--display); font-weight:800; font-size:.9rem; }
#soundBtn .off{ display:none; }
#soundBtn[aria-pressed="false"] .on{ display:none; }
#soundBtn[aria-pressed="false"] .off{ display:inline; }
#speedBtn.fast{ color:var(--gold); border-color:rgba(255,211,92,.45); }

/* ---------- board ---------- */
.board-wrap{
  position:relative;
  padding:7px;
  border-radius:24px;
  /* a wooden planter box round the garden */
  background:
    repeating-linear-gradient(90deg, rgba(0,0,0,.06) 0 2px, transparent 2px 23px),
    linear-gradient(180deg, #A9744A, #7A4F2E);
  box-shadow:
    0 30px 60px -30px rgba(0,0,0,.9),
    inset 0 2px 0 rgba(255,230,190,.35),
    inset 0 -3px 0 rgba(0,0,0,.25),
    0 0 0 2px #4A2E1A;
}
#board{
  display:block; width:100%;
  border-radius:17px;
  box-shadow:0 0 0 2px #4A2E1A;
  touch-action:manipulation; user-select:none; -webkit-user-select:none;
  cursor:pointer;
}
#board.aiming{ cursor:crosshair; }
#board:focus{ outline:none; }
#board:focus-visible{ outline:3px solid var(--gold); outline-offset:-3px; }

.toast{
  position:absolute; left:50%; top:12px; transform:translate(-50%, -8px);
  max-width:calc(100% - 24px);
  background:rgba(16,10,28,.92); border:1px solid var(--line-strong);
  border-radius:14px; padding:8px 16px; font-size:.86rem; text-align:center;
  opacity:0; pointer-events:none;
  transition:opacity .2s ease, transform .2s ease;
}
.toast.show{ opacity:1; transform:translate(-50%, 0); }

.overlay{
  position:absolute; inset:7px; border-radius:17px;
  display:flex; flex-direction:column; align-items:center; justify-content:center; gap:10px;
  text-align:center; padding:18px;
  background:rgba(16,10,28,.78);
  -webkit-backdrop-filter:blur(3px); backdrop-filter:blur(3px);
}
.overlay[hidden]{ display:none; }
.overlay.tall{ justify-content:flex-start; overflow-y:auto; padding-top:16px; }
.ov-pic{ display:flex; justify-content:center; }
.ov-pic[hidden]{ display:none; }
.ov-pic canvas{
  width:96px; height:96px; border-radius:24px;
  background:radial-gradient(circle at 50% 60%, rgba(156,193,82,.55), rgba(156,193,82,.12) 70%);
  border:1px solid var(--line-strong);
}
@media (prefers-reduced-motion:no-preference){
  .ov-pic canvas{ animation:starpop .45s cubic-bezier(.3,1.6,.5,1) both; }
}

/* the level map */
.level-map{ display:flex; flex-direction:column; gap:12px; width:100%; max-width:640px; }
.level-map[hidden]{ display:none; }
.level-map h3{ margin:0 0 6px; font-family:var(--display); font-weight:800; font-size:.95rem; color:var(--muted); text-align:left; }
.level-row{ display:grid; grid-template-columns:repeat(4, 1fr); gap:8px; }
.level-card{
  cursor:pointer; display:flex; flex-direction:column; align-items:center; gap:1px;
  padding:8px 4px 6px; border-radius:14px; min-width:0;
  color:var(--text); border:1px solid rgba(255,255,255,.18);
  background:linear-gradient(170deg, #7DB043, #4C8A2E);
  box-shadow:0 3px 0 #2E5A1E;
  transition:transform .12s ease, border-color .12s ease;
}
.level-card.autumn{ background:linear-gradient(170deg, #E3943A, #A9551F); box-shadow:0 3px 0 #6E3414; }
.level-card:hover:not(:disabled){ transform:translateY(-2px); border-color:var(--gold); }
.level-card:focus-visible{ outline:2px solid var(--gold); outline-offset:2px; }
.level-card.current{ border:2px solid var(--gold); }
.level-card:disabled{ cursor:default; filter:grayscale(.85) brightness(.55); }
.level-card b{ font-family:var(--display); font-weight:800; font-size:1.05rem; line-height:1.1; text-shadow:0 1px 0 rgba(0,0,0,.35); }
.level-card b svg{ width:18px; height:18px; display:block; margin:2px auto; }
.level-card span{ font-size:.7rem; line-height:1.2; max-width:100%; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.level-card i{ font-style:normal; font-size:.82rem; letter-spacing:1px; line-height:1; }
.level-card em{ font-style:normal; color:rgba(0,0,0,.28); }
.level-card em.on{ color:var(--gold); text-shadow:0 0 6px rgba(255,211,92,.6), 0 1px 0 rgba(0,0,0,.4); }
.overlay h2{ margin:0; font-family:var(--display); font-weight:800; font-size:1.8rem; line-height:1.1; }
.overlay p{ margin:0; color:var(--muted); font-size:.92rem; line-height:1.5; max-width:38ch; }
.overlay p b{ color:var(--text); }
.big-stars{ display:flex; gap:10px; font-size:2.6rem; line-height:1; }
.big-stars[hidden]{ display:none; }
.big-stars span{ color:rgba(255,255,255,.16); display:inline-block; }
.big-stars span.on{ color:var(--gold); text-shadow:0 0 18px rgba(255,211,92,.6); }
@media (prefers-reduced-motion:no-preference){
  .big-stars span.on{ animation:starpop .5s cubic-bezier(.3,1.6,.5,1) both; }
  .big-stars span:nth-child(2).on{ animation-delay:.15s; }
  .big-stars span:nth-child(3).on{ animation-delay:.3s; }
}
@keyframes starpop{ from{ transform:scale(0) rotate(-40deg); opacity:0; } to{ transform:scale(1) rotate(0); opacity:1; } }
.how{ display:flex; gap:12px; justify-content:center; flex-wrap:wrap; margin:4px 0; }
.how[hidden]{ display:none; }
.how div{
  background:var(--panel); border:1px solid var(--line); border-radius:14px;
  padding:8px 12px; font-size:.8rem; color:var(--muted); max-width:150px; line-height:1.35;
}
.how b{ display:block; font-family:var(--display); font-size:1.4rem; color:var(--gold); line-height:1; margin-bottom:2px; }
.btn-row{ display:flex; gap:10px; flex-wrap:wrap; justify-content:center; margin-top:4px; }
.cta{
  cursor:pointer; border:0;
  font-family:var(--display); font-weight:800; font-size:1.08rem;
  color:#fff; padding:9px 28px; border-radius:999px;
  background:linear-gradient(160deg, var(--pink), var(--pink-2));
  box-shadow:0 12px 22px -12px rgba(231,80,138,.95);
  transition:transform .15s ease;
}
.cta:hover{ transform:translateY(-1px) scale(1.03); }
.cta:focus-visible{ outline:3px solid var(--gold); outline-offset:3px; }
.cta.ghost{ background:transparent; border:1px solid var(--line-strong); box-shadow:none; font-size:.92rem; padding:8px 20px; }
.cta[hidden]{ display:none; }

/* ---------- dock: next wave + context panel ---------- */
.dock{ display:flex; gap:10px; margin-top:12px; align-items:stretch; }
.wave-btn{
  cursor:pointer; flex:none; width:168px;
  display:flex; flex-direction:column; justify-content:center; gap:6px;
  padding:10px 14px; text-align:left;
  color:#fff; border:0; border-radius:18px;
  background:linear-gradient(160deg, #8BD346, #3E9B3A);
  box-shadow:0 5px 0 #24601F;
  transition:transform .06s ease, box-shadow .06s ease, filter .15s ease;
  touch-action:manipulation;
}
.wave-btn:active{ transform:translateY(4px); box-shadow:0 1px 0 #24601F; }
.wave-btn:focus-visible{ outline:2px solid var(--gold); outline-offset:3px; }
.wave-btn:disabled{ filter:grayscale(.8) brightness(.7); cursor:default; }
.wave-btn:disabled:active{ transform:none; box-shadow:0 5px 0 #24601F; }
.wave-top{ display:flex; flex-direction:column; line-height:1.15; }
.wave-top b{ font-family:var(--display); font-weight:800; font-size:1.1rem; }
.wave-top small{ font-size:.72rem; opacity:.9; min-height:1.1em; }
.wave-preview{ display:flex; flex-wrap:wrap; gap:4px; min-height:26px; }
.wave-preview span{
  display:inline-flex; align-items:center; gap:2px;
  background:rgba(0,0,0,.2); border-radius:999px; padding:1px 7px 1px 2px;
  font-family:var(--mono); font-size:.7rem;
}
.wave-preview canvas{ width:22px; height:22px; }

.powers{ display:flex; flex-direction:column; gap:8px; justify-content:center; flex:none; }
.powers[hidden]{ display:none; }
.power{
  --cd:0;
  position:relative; cursor:pointer; width:54px; height:54px; border-radius:50%; padding:0;
  display:flex; align-items:center; justify-content:center;
  background:radial-gradient(circle at 40% 35%, #4A3478, var(--panel) 70%);
  border:2px solid rgba(255,211,92,.55);
  box-shadow:0 4px 0 #120B22;
  transition:transform .1s ease, border-color .15s ease;
  touch-action:manipulation;
}
.power canvas{ width:40px; height:40px; }
.power::after{   /* the recharge sweep */
  content:''; position:absolute; inset:-2px; border-radius:50%; pointer-events:none;
  background:conic-gradient(rgba(16,10,28,.72) calc(var(--cd) * 360deg), transparent 0);
}
.power kbd{
  position:absolute; right:-4px; bottom:-4px; z-index:1;
  font-family:var(--mono); font-size:.6rem; color:var(--text);
  background:var(--panel-2); border:1px solid var(--line-strong); border-radius:6px; padding:0 4px;
}
.power:hover:not(:disabled){ transform:translateY(-2px); border-color:var(--gold); }
.power:active:not(:disabled){ transform:translateY(2px); box-shadow:0 1px 0 #120B22; }
.power:focus-visible{ outline:2px solid var(--gold); outline-offset:3px; }
.power:disabled{ cursor:default; border-color:var(--line-strong); }
.power[aria-pressed="true"]{ border-color:#fff; box-shadow:0 0 0 4px rgba(255,211,92,.45), 0 4px 0 #120B22; }
@media (prefers-reduced-motion:no-preference){
  .power[aria-pressed="true"]{ animation:aimpulse 1s ease-in-out infinite; }
}
@keyframes aimpulse{ 50%{ box-shadow:0 0 0 8px rgba(255,211,92,.2), 0 4px 0 #120B22; } }

.panel{
  flex:1; min-width:0; min-height:118px;
  background:linear-gradient(180deg, var(--panel-2), var(--panel));
  border:1px solid var(--line-strong); border-radius:18px;
  padding:10px 12px;
  display:flex; flex-direction:column; gap:8px;
}
.panel-head{ display:flex; align-items:center; gap:8px; }
.panel-head h3{ margin:0; flex:1; font-family:var(--display); font-weight:800; font-size:1.05rem; line-height:1.2; }
.panel-head .lv{ color:var(--gold); font-size:.85rem; margin-left:4px; }
.panel .close{ width:30px; height:30px; }
.panel .close svg{ width:14px; height:14px; }
.panel-tip{ margin:auto 0; color:var(--muted); font-size:.88rem; line-height:1.5; text-align:center; }
.panel-tip b{ color:var(--text); }

.build-list{ display:flex; gap:8px; overflow-x:auto; padding-bottom:2px; }
.build-card{
  cursor:pointer; flex:none; width:96px;
  display:flex; flex-direction:column; align-items:center; gap:2px;
  padding:6px 6px 7px; border-radius:14px;
  color:var(--text); background:rgba(255,255,255,.05); border:1px solid var(--line);
  transition:transform .12s ease, border-color .12s ease, opacity .12s ease;
}
.build-card:hover:not(:disabled){ transform:translateY(-2px); border-color:var(--leaf); }
.build-card:focus-visible{ outline:2px solid var(--gold); outline-offset:2px; }
.build-card:disabled{ opacity:.45; cursor:default; }
.build-card canvas{ width:44px; height:44px; }
.build-card b{ font-family:var(--display); font-weight:800; font-size:.86rem; line-height:1.1; }
.build-card small{ font-family:var(--mono); font-size:.72rem; color:var(--gold); }
.build-card kbd{ font-family:var(--mono); font-size:.62rem; color:var(--muted); }
.build-blurb{ margin:0; font-size:.78rem; color:var(--muted); line-height:1.4; }

.tower-body{ display:flex; gap:12px; align-items:center; flex-wrap:wrap; }
.tower-stats{ display:flex; gap:6px; flex-wrap:wrap; flex:1; min-width:180px; }
.tower-stats span{
  background:rgba(0,0,0,.18); border-radius:10px; padding:4px 9px; font-size:.76rem; color:var(--muted);
}
.tower-stats b{ color:var(--text); font-family:var(--mono); font-size:.8rem; }
.tower-stats i{ font-style:normal; color:var(--leaf); font-family:var(--mono); font-size:.76rem; }
.tower-actions{ display:flex; gap:8px; flex-wrap:wrap; }
.act{
  cursor:pointer; display:flex; flex-direction:column; align-items:center; line-height:1.15;
  min-width:84px; padding:6px 12px; border-radius:14px;
  color:var(--text); background:rgba(255,255,255,.06); border:1px solid var(--line-strong);
  transition:transform .12s ease, border-color .12s ease;
}
.act:hover:not(:disabled){ transform:translateY(-1px); border-color:var(--gold); }
.act:focus-visible{ outline:2px solid var(--gold); outline-offset:2px; }
.act:disabled{ opacity:.45; cursor:default; }
.act[hidden]{ display:none; }
.act b{ font-family:var(--display); font-weight:800; font-size:.9rem; }
.act small{ font-family:var(--mono); font-size:.7rem; color:var(--gold); }
.act.up{ background:linear-gradient(160deg, rgba(139,211,70,.3), rgba(62,155,58,.3)); border-color:rgba(139,211,70,.5); }
.act.sell small{ color:var(--mint); }

.keys-help{
  margin:18px auto 0; max-width:700px;
  display:flex; flex-wrap:wrap; justify-content:center; gap:8px 16px;
  font-size:.8rem; color:var(--muted);
}
.keys-help kbd{
  font-family:var(--mono); font-size:.72rem; color:var(--text);
  background:var(--panel-2); border:1px solid var(--line-strong); border-bottom-width:3px;
  border-radius:6px; padding:1px 6px; margin-right:3px;
}
.touch-help{ display:none; text-align:center; font-size:.8rem; color:var(--muted); margin:14px auto 0; max-width:44ch; line-height:1.5; }
@media (hover:none) and (pointer:coarse){
  .keys-help{ display:none; }
  .touch-help{ display:block; }
  .build-card kbd{ display:none; }
}

@media (max-width:600px){
  .page{ padding:4px 10px 30px; }
  .hero p{ display:none; }
  .hud{ gap:5px; }
  .pill{ padding:5px 9px; font-size:.78rem; gap:4px; }
  .pill b{ font-size:.9rem; }
  .level-pill span{ display:none; }
  .level-pill{ padding:5px 8px; }
  .icon-btn{ width:32px; height:32px; }
  .board-wrap{ border-radius:18px; padding:5px; }
  #board, .overlay{ border-radius:13px; }
  .overlay{ inset:5px; }
  .dock{ flex-direction:column; }
  .wave-btn{ width:auto; flex-direction:row; align-items:center; justify-content:space-between; }
  .wave-preview{ justify-content:flex-end; }
  .powers{ flex-direction:row; justify-content:center; }
  .power{ width:48px; height:48px; }
  .power canvas{ width:34px; height:34px; }
  .level-row{ gap:5px; }
  .level-card{ padding:5px 2px 4px; border-radius:10px; }
  .level-card b{ font-size:.9rem; }
  .level-card span{ display:none; }
  .level-map{ gap:6px; }
  .level-map h3{ font-size:.8rem; margin-bottom:3px; }
  .ov-pic canvas{ width:64px; height:64px; border-radius:16px; }
  .overlay h2{ font-size:1.45rem; }
  .how div{ max-width:120px; }
}