:root {
  --bg: #0b0f1e;
  --fg: #eaf6ff;
  --muted: #8ea3c4;
  --accent: #5cffb0;
  --accent2: #ffd166;
  --danger: #ff4d6d;
  --panel: rgba(14, 20, 40, 0.86);
}
* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body {
  margin: 0; height: 100%; overflow: hidden; background: var(--bg); color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  user-select: none; -webkit-user-select: none; -webkit-touch-callout: none;
  overscroll-behavior: none;
}
canvas { position: fixed; inset: 0; display: block; touch-action: none; }
#safe {
  position: fixed; visibility: hidden; pointer-events: none;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}
.hidden { display: none !important; }

#hud {
  position: fixed; left: 0; right: 0; top: 0;
  padding: calc(env(safe-area-inset-top) + 8px) calc(env(safe-area-inset-right) + 14px) 0 calc(env(safe-area-inset-left) + 14px);
  display: flex; align-items: flex-start; justify-content: space-between;
  pointer-events: none; height: calc(env(safe-area-inset-top) + 60px);
}
.hud-left, .hud-right { flex: 1; }
.hud-right { display: flex; justify-content: flex-end; }
.hud-mid { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.score { font-size: 30px; font-weight: 800; letter-spacing: 1px; font-variant-numeric: tabular-nums; text-shadow: 0 0 12px rgba(92,255,176,.45); }
.combo { font-size: 14px; font-weight: 800; color: var(--accent2); min-height: 18px; transition: transform .1s; }
.combo.pop { transform: scale(1.35); }
.powers { display: flex; flex-direction: column; align-items: flex-start; gap: 4px; margin-top: 2px; }
.powers span {
  font-size: 10px; font-weight: 800; letter-spacing: 0.5px; padding: 2px 6px; border-radius: 999px; opacity: 0.9;
  color: #0b0f1e; font-variant-numeric: tabular-nums;
}
.wave { font-size: 12px; font-weight: 700; letter-spacing: 3px; color: var(--muted); }
.ammo { display: flex; gap: 4px; min-height: 22px; }
.ammo i {
  width: 16px; height: 20px; border-radius: 45% 45% 50% 50%; display: block;
  background: radial-gradient(circle at 35% 35%, #9fd36b, #4c7a22 70%);
  box-shadow: inset 0 -3px 0 rgba(0,0,0,.25), 0 0 8px rgba(160,255,90,.35); position: relative;
}
.ammo i::before { content: ""; position: absolute; left: 4px; right: 4px; top: -4px; height: 5px; background: var(--accent2); border-radius: 2px; }
.ammo i.empty { background: rgba(255,255,255,.08); box-shadow: none; }
.ammo i.empty::before { background: rgba(255,255,255,.12); }
.icon-btn {
  pointer-events: auto; width: 44px; height: 44px; border-radius: 12px; border: 1px solid rgba(255,255,255,.15);
  background: rgba(255,255,255,.06); color: var(--fg); font-size: 14px; letter-spacing: -2px; cursor: pointer;
}

.banner {
  position: fixed; left: 0; right: 0; top: 38%; text-align: center; pointer-events: none;
  font-size: 42px; font-weight: 900; letter-spacing: 6px; color: var(--accent2);
  text-shadow: 0 0 24px rgba(255,209,102,.6); opacity: 0; transform: scale(.8);
  transition: opacity .25s, transform .25s;
}
.banner.show { opacity: 1; transform: scale(1); }

.overlay {
  position: fixed; inset: 0; display: flex; align-items: center; justify-content: center;
  background: radial-gradient(ellipse at center, rgba(11,15,30,.55), rgba(11,15,30,.9));
  padding: env(safe-area-inset-top) 16px env(safe-area-inset-bottom);
  animation: fade .25s ease-out;
}
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }
.panel {
  width: min(380px, 100%); max-height: 100%; overflow-y: auto; background: var(--panel); border: 1px solid rgba(255,255,255,.1);
  border-radius: 22px; padding: 28px 22px; text-align: center; backdrop-filter: blur(6px);
  box-shadow: 0 20px 60px rgba(0,0,0,.5); display: flex; flex-direction: column; gap: 12px; align-items: stretch;
}
.logo { margin: 0; font-size: clamp(30px, 10.5vw, 46px); font-weight: 900; letter-spacing: 2px; color: var(--accent2); text-shadow: 0 0 20px rgba(255,209,102,.5); }
.logo span { color: var(--accent); text-shadow: 0 0 20px rgba(92,255,176,.5); }
.tag { margin: -6px 0 6px; color: var(--muted); }
h2 { margin: 0 0 6px; letter-spacing: 4px; }
.btn {
  font: inherit; font-weight: 800; letter-spacing: 2px; font-size: 18px; padding: 14px; border-radius: 14px;
  border: 1px solid rgba(255,255,255,.15); background: rgba(255,255,255,.07); color: var(--fg); cursor: pointer;
  transition: transform .08s;
}
.btn:active { transform: scale(.97); }
.btn.primary { background: linear-gradient(180deg, #6dffbd, #22c98a); color: #062016; border: none; box-shadow: 0 6px 24px rgba(92,255,176,.35); font-size: 22px; }
.btn.ghost { background: transparent; }
.btn.small { font-size: 13px; padding: 10px; }
.opt { display: flex; flex-direction: column; gap: 6px; text-align: left; }
.opt-label { font-size: 11px; font-weight: 700; letter-spacing: 2.5px; color: var(--muted); }
.seg { display: flex; gap: 4px; padding: 4px; border-radius: 14px; background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.1); }
.seg button {
  flex: 1; font: inherit; font-weight: 800; font-size: 15px; padding: 10px 6px; border-radius: 10px; border: 0;
  background: transparent; color: var(--muted); cursor: pointer; transition: background .15s, color .15s;
}
.seg button[aria-checked="true"] { background: var(--fg); color: #0b0f1e; }
#seg-diff button[data-v="easy"][aria-checked="true"] { background: var(--accent); }
#seg-diff button[data-v="normal"][aria-checked="true"] { background: var(--accent2); }
#seg-diff button[data-v="hard"][aria-checked="true"] { background: var(--danger); color: #fff; }
.seg button:focus-visible, .btn:focus-visible { outline: 2px solid var(--accent2); outline-offset: 2px; }
.opt-desc { margin: -2px 0 2px; min-height: 2.6em; color: #c5d4ec; font-size: 13px; line-height: 1.35; text-align: left; }
.over-mode { margin-top: -8px; color: var(--muted); font-size: 13px; letter-spacing: 2px; font-weight: 700; }
.best { color: var(--muted); letter-spacing: 2px; font-size: 14px; }
.best b { color: var(--fg); font-size: 18px; }
.howto { list-style: none; padding: 0; margin: 2px 0 0; text-align: left; color: #c5d4ec; font-size: 14px; line-height: 1.9; }
.howto b { color: var(--fg); }
.dot { display: inline-block; width: 11px; height: 11px; border-radius: 50%; vertical-align: -1px; }
.dot.orb { background: #ff8fd8; box-shadow: 0 0 8px #ff8fd8; }
.dot.nade { background: #7bb33e; box-shadow: 0 0 8px #a0ff5a; border-top: 3px solid var(--accent2); }
.keys { margin: 0; color: var(--muted); font-size: 12px; }
@media (hover: none) { .keys { display: none; } }
.final { font-size: 56px; font-weight: 900; color: var(--accent); text-shadow: 0 0 24px rgba(92,255,176,.5); font-variant-numeric: tabular-nums; }
.new-best { color: var(--accent2); font-weight: 900; letter-spacing: 4px; animation: pulse .7s infinite alternate; }
@keyframes pulse { to { transform: scale(1.12); } }
.stats { color: var(--muted); font-size: 14px; line-height: 1.6; }
@media (max-height: 760px) {
  .howto { display: none; }
  .panel { gap: 10px; padding: 20px 18px; }
}
@media (max-height: 560px) {
  .panel { padding: 16px; gap: 8px; }
  .howto { display: none; }
  .logo { font-size: 34px; }
}