:root {
  --accent: #ffd23f;
  --accent2: #ff8a2b;
  --panel: rgba(12, 16, 30, 0.82);
  --text: #eef2fa;
  --muted: #a9b3c7;
  --touch-h: 200px;
  --pad: 150px;
  --bigbtn: 88px;
  --smallbtn: 72px;
}

*, *::before, *::after { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: #05070d;
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  overflow: hidden;
  overscroll-behavior: none;
  -webkit-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  -webkit-text-size-adjust: 100%;
}

#app { position: fixed; inset: 0; touch-action: none; }
#game { position: absolute; inset: 0; display: block; width: 100%; height: 100%; }
.hidden { display: none !important; }

/* ---------- screens ---------- */
.screen {
  position: absolute;
  inset: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: max(14px, env(safe-area-inset-top)) max(14px, env(safe-area-inset-right)) max(14px, env(safe-area-inset-bottom)) max(14px, env(safe-area-inset-left));
  background: radial-gradient(ellipse at center, rgba(5, 7, 13, 0.25), rgba(5, 7, 13, 0.72));
  overflow-y: auto;
  touch-action: pan-y;
}
#scr-title { background: linear-gradient(180deg, rgba(5, 7, 13, 0.05), rgba(5, 7, 13, 0.55)); }

.panel {
  width: min(580px, 100%);
  max-height: 100%;
  overflow-y: auto;
  background: var(--panel);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 22px;
  padding: 22px 22px 18px;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.55);
  text-align: center;
  user-select: text;
}
.title-panel { background: rgba(10, 14, 28, 0.62); }

h1, h2, h3 { margin: 0 0 10px; }
h2 { font-size: 1.6rem; letter-spacing: 0.02em; }
h3 { font-size: 1.02rem; color: var(--accent); }
p { line-height: 1.5; }
.muted { color: var(--muted); }

.logo {
  font-size: clamp(2.5rem, 11vw, 4.8rem);
  font-weight: 900;
  letter-spacing: 0.07em;
  line-height: 1.05;
  margin: 4px 0 6px;
  background: linear-gradient(180deg, #fff6c2 0%, #ffd23f 42%, #ff8a2b 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 4px 0 rgba(110, 45, 0, 0.75)) drop-shadow(0 12px 22px rgba(0, 0, 0, 0.55));
}
.tag { margin: 0 auto 6px; max-width: 420px; color: #d7deeb; }

.menu { display: grid; gap: 10px; margin: 16px auto 8px; max-width: 320px; }

.btn {
  appearance: none;
  border: 0;
  border-radius: 13px;
  padding: 12px 18px;
  font: 700 1.04rem system-ui, -apple-system, "Segoe UI", sans-serif;
  color: #16181f;
  background: linear-gradient(180deg, #ffffff, #d9e0ec);
  box-shadow: 0 3px 0 rgba(0, 0, 0, 0.35);
  cursor: pointer;
  transition: transform 0.08s ease, filter 0.12s ease;
}
.btn.primary { background: linear-gradient(180deg, #ffe680, #ffad2a); }
.btn.small { padding: 8px 14px; font-size: 0.95rem; }
.btn:hover { filter: brightness(1.06); }
.btn:active { transform: translateY(2px); box-shadow: 0 1px 0 rgba(0, 0, 0, 0.35); }
.btn:focus-visible, .chip:focus-visible, .tower-card:focus-visible { outline: 3px solid rgba(255, 210, 63, 0.75); outline-offset: 2px; }

.chips { display: flex; flex-wrap: wrap; gap: 7px; justify-content: center; }
.chip {
  border-radius: 999px;
  padding: 7px 12px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.07);
  color: var(--text);
  font: 600 0.92rem system-ui, -apple-system, "Segoe UI", sans-serif;
  cursor: pointer;
}
.chip.on { background: var(--accent); border-color: var(--accent); color: #1a1a1a; }

.music-quick { margin: 14px 0 6px; display: grid; gap: 8px; }
.music-quick .label { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--muted); }

.home-link { display: inline-block; margin-top: 12px; color: var(--muted); text-decoration: none; font-size: 0.92rem; }
.home-link:hover { color: var(--accent); }

/* settings */
.settings { display: grid; gap: 14px; text-align: left; margin: 12px 0 16px; }
.set-row { display: grid; gap: 7px; }
.set-row > span { font-weight: 600; }
.set-row.check { grid-template-columns: auto 1fr; align-items: start; gap: 10px; }
.set-row.check small { display: block; color: var(--muted); font-weight: 400; margin-top: 2px; }
.set-row input[type=range] { width: 100%; accent-color: var(--accent); }
.set-row input[type=checkbox] { width: 20px; height: 20px; accent-color: var(--accent); margin-top: 2px; }
.set-row .chips { justify-content: flex-start; }
details.more { margin: 8px 0; text-align: left; }
details.more summary { cursor: pointer; color: var(--muted); text-align: center; }

/* tower select */
.tower-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(118px, 1fr)); gap: 10px; margin: 14px 0 16px; }
.tower-card {
  display: grid;
  gap: 2px;
  padding: 12px 8px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #fff;
  cursor: pointer;
  background: linear-gradient(160deg, var(--sky, #334) 0%, rgba(0, 0, 0, 0.55) 100%), var(--tc, #555);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.8);
  font-family: inherit;
}
.tower-card .tnum { font-size: 1.7rem; font-weight: 900; }
.tower-card .tname { font-weight: 700; font-size: 0.95rem; }
.tower-card .tinfo { font-size: 0.78rem; opacity: 0.85; }
.tower-card:disabled { filter: grayscale(1) brightness(0.55); cursor: not-allowed; }

/* help */
.help { text-align: left; width: min(720px, 100%); }
.help h2, .help > .btn { display: block; margin-left: auto; margin-right: auto; text-align: center; }
.help-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 6px 18px; }
.help ul { margin: 0 0 12px; padding-left: 18px; line-height: 1.55; }
kbd {
  display: inline-block;
  min-width: 1.6em;
  padding: 1px 6px;
  margin: 0 1px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.25);
  font: 600 0.82rem ui-monospace, Menlo, Consolas, monospace;
  text-align: center;
}

/* scores */
table.scores { width: 100%; border-collapse: collapse; margin: 10px 0 16px; font-variant-numeric: tabular-nums; }
table.scores td { padding: 7px 6px; border-bottom: 1px solid rgba(255, 255, 255, 0.08); text-align: left; }
table.scores td:nth-child(3) { text-align: right; font-weight: 700; color: #ffe37a; }
table.scores td:nth-child(4) { text-align: right; color: var(--muted); font-size: 0.88rem; }
table.scores tr.hl td { background: rgba(255, 210, 63, 0.16); }
table.scores td.empty { text-align: center; color: var(--muted); }

.name-row { margin: 10px 0; display: grid; gap: 8px; }
.name-input { display: flex; gap: 8px; justify-content: center; }
.name-input input {
  flex: 1;
  max-width: 260px;
  padding: 11px 12px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  font: 600 1.05rem system-ui, sans-serif;
  user-select: text;
}

/* ---------- pause button ---------- */
.pause-btn {
  position: absolute;
  z-index: 15;
  top: calc(10px + env(safe-area-inset-top));
  right: calc(10px + env(safe-area-inset-right));
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 13px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  background: rgba(0, 0, 0, 0.38);
  color: #fff;
  cursor: pointer;
}

/* ---------- touch controls ---------- */
.touch { position: absolute; left: 0; right: 0; bottom: 0; height: var(--touch-h); z-index: 10; pointer-events: none; }
.touch.portrait { background: linear-gradient(180deg, rgba(4, 8, 18, 0) 0%, rgba(4, 8, 18, 0.7) 22%, rgba(4, 8, 18, 0.88) 100%); }
.pad {
  position: absolute;
  left: max(16px, env(safe-area-inset-left));
  bottom: calc(16px + env(safe-area-inset-bottom));
  width: var(--pad);
  height: var(--pad);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.07) 0%, rgba(255, 255, 255, 0.14) 100%);
  border: 2px solid rgba(255, 255, 255, 0.28);
  pointer-events: auto;
  touch-action: none;
}
.pad.active { border-color: rgba(255, 210, 63, 0.7); }
.knob {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 42%;
  height: 42%;
  margin: -21% 0 0 -21%;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, rgba(255, 255, 255, 0.7), rgba(255, 255, 255, 0.25));
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.4);
  pointer-events: none;
}
.arr { position: absolute; width: 0; height: 0; border: 8px solid transparent; opacity: 0.6; pointer-events: none; }
.a-up { left: 50%; top: 7%; margin-left: -8px; border-bottom-color: #fff; border-top-width: 0; }
.a-down { left: 50%; bottom: 7%; margin-left: -8px; border-top-color: #fff; border-bottom-width: 0; }
.a-left { top: 50%; left: 7%; margin-top: -8px; border-right-color: #fff; border-left-width: 0; }
.a-right { top: 50%; right: 7%; margin-top: -8px; border-left-color: #fff; border-right-width: 0; }

.tbtn {
  position: absolute;
  pointer-events: auto;
  touch-action: none;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.45);
  color: #fff;
  font: 800 0.86rem system-ui, -apple-system, "Segoe UI", sans-serif;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.7);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.35), inset 0 2px 8px rgba(255, 255, 255, 0.25);
  -webkit-user-select: none;
  user-select: none;
}
.tbtn.jump {
  right: max(16px, env(safe-area-inset-right));
  bottom: calc(34px + env(safe-area-inset-bottom));
  width: var(--bigbtn);
  height: var(--bigbtn);
  background: radial-gradient(circle at 35% 30%, rgba(255, 190, 120, 0.85), rgba(240, 110, 30, 0.75));
}
.tbtn.fire {
  right: calc(max(16px, env(safe-area-inset-right)) + var(--bigbtn) + 12px);
  bottom: calc(12px + env(safe-area-inset-bottom));
  width: var(--smallbtn);
  height: var(--smallbtn);
  background: radial-gradient(circle at 35% 30%, rgba(150, 235, 255, 0.85), rgba(40, 150, 220, 0.75));
}
.tbtn.active { transform: scale(0.93); filter: brightness(1.25); }

.noscript { position: absolute; inset: 0; display: grid; place-items: center; }

@media (max-height: 520px) {
  .panel { padding: 14px 16px 12px; }
  .logo { font-size: clamp(2rem, 8vh, 3.2rem); }
  .menu { gap: 7px; margin: 10px auto 6px; grid-template-columns: 1fr 1fr; max-width: 460px; }
  .menu .btn.primary { grid-column: 1 / -1; }
  .btn { padding: 9px 14px; }
}