:root {
  --bg: #05030c;
  --ink: #dff6ff;
  --dim: #8ea2c8;
  --cyan: #62f0ff;
  --pink: #ff4fa8;
  --gold: #ffcf4a;
  --violet: #b98cff;
  --panel: rgba(8, 6, 22, 0.78);
  --line: rgba(120, 200, 255, 0.35);
  --font: "Bahnschrift", "DIN Alternate", "Segoe UI", "Roboto Condensed", "Arial Narrow", system-ui, sans-serif;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in: cubic-bezier(0.55, 0, 1, 0.45);
}

* { box-sizing: border-box; }
html, body {
  margin: 0; height: 100%; overflow: hidden;
  background: var(--bg); color: var(--ink);
  font-family: var(--font);
  -webkit-user-select: none; user-select: none;
  -webkit-tap-highlight-color: transparent;
  touch-action: none;
}

#gl {
  position: fixed; inset: 0;
  width: 100vw; height: 100vh; height: 100dvh;
  display: block;
  cursor: crosshair;
}
body.playing #gl { cursor: none; }

#ui { position: fixed; inset: 0; pointer-events: none; }

/* ---------- menus ---------- */
.menu {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden;
  transform: scale(0.985);
  transition: opacity 180ms var(--ease-in), transform 180ms var(--ease-in), visibility 0s linear 180ms;
  pointer-events: none;
}
.menu.show {
  opacity: 1; visibility: visible; transform: none;
  transition: opacity 260ms var(--ease-out), transform 260ms var(--ease-out), visibility 0s;
  pointer-events: auto;
}
/* a menu that is fading out must never swallow clicks meant for the next one */
.menu:not(.show) * { pointer-events: none !important; }
#m-title { justify-content: flex-start; pointer-events: none; }
#m-title.show nav, #m-title.show .best { pointer-events: auto; }
.title-spacer { height: 52vh; flex: none; }

.panel-wrap { background: rgba(3, 2, 10, 0.45); }
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: 0 0 40px rgba(80, 160, 255, 0.18), inset 0 0 30px rgba(80, 120, 255, 0.08);
  padding: 28px 36px 30px;
  max-width: min(920px, calc(100vw - 32px));
  max-height: calc(100dvh - 32px);
  overflow: auto;
  border-radius: 6px;
  text-align: center;
  backdrop-filter: blur(3px);
}
.panel.narrow { min-width: 320px; }

h2 {
  margin: 0 0 18px;
  font-size: clamp(28px, 4vw, 44px);
  letter-spacing: 0.18em;
  font-weight: 700;
  color: #fff;
  text-shadow: 0 0 12px var(--cyan), 0 0 28px rgba(98, 240, 255, 0.5);
}
h3 { margin: 6px 0 10px; letter-spacing: 0.14em; color: var(--cyan); font-size: 15px; }

.stack { display: flex; flex-direction: column; gap: 10px; align-items: stretch; min-width: 260px; }
.row { display: flex; gap: 12px; justify-content: center; margin-top: 18px; flex-wrap: wrap; }

.btn {
  pointer-events: auto;
  font-family: var(--font);
  font-size: 18px; letter-spacing: 0.2em; font-weight: 600;
  color: var(--ink);
  background: rgba(10, 14, 36, 0.7);
  border: 1px solid rgba(98, 240, 255, 0.45);
  padding: 11px 26px;
  border-radius: 3px;
  cursor: pointer;
  text-shadow: 0 0 8px rgba(98, 240, 255, 0.6);
  box-shadow: 0 0 0 rgba(98, 240, 255, 0), inset 0 0 12px rgba(98, 240, 255, 0.08);
  transition: transform 140ms var(--ease-out), box-shadow 160ms var(--ease-out), background 160ms var(--ease-out), border-color 160ms var(--ease-out);
}
.btn:hover, .btn:focus-visible {
  outline: none;
  background: rgba(20, 40, 80, 0.85);
  border-color: var(--cyan);
  box-shadow: 0 0 18px rgba(98, 240, 255, 0.45), inset 0 0 16px rgba(98, 240, 255, 0.18);
  transform: translateY(-1px);
}
.btn:active { transform: translateY(1px) scale(0.99); }
.btn.big { font-size: 24px; padding: 14px 30px; border-color: var(--cyan); }
.btn.tiny { font-size: 12px; padding: 6px 10px; letter-spacing: 0.1em; }

/* on the title the flail toy swings behind the menu: keep the buttons see-through */
#m-title .btn { background: rgba(10, 14, 36, 0.28); backdrop-filter: none; }
#m-title .btn:hover { background: rgba(20, 40, 80, 0.5); }
.best { margin: 18px 0 4px; color: var(--gold); letter-spacing: 0.2em; font-size: 15px; text-shadow: 0 0 10px rgba(255, 207, 74, 0.6); min-height: 1em; }
.tag { margin: 4px 0; color: var(--dim); letter-spacing: 0.3em; font-size: 12px; text-transform: uppercase; opacity: 0.75; }
.rotate { display: none; margin: 10px 0; color: var(--gold); letter-spacing: 0.2em; font-size: 13px; text-transform: uppercase; }
@media (orientation: portrait) and (pointer: coarse) { .rotate { display: block; } }
@media (max-width: 520px) { .tag { letter-spacing: 0.12em; font-size: 10px; } }

.cols { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; text-align: left; margin-bottom: 20px; }
@media (max-width: 720px) { .cols { grid-template-columns: 1fr; gap: 12px; } }
.keys { border-collapse: collapse; width: 100%; font-size: 15px; }
.keys td { padding: 5px 8px; border-bottom: 1px solid rgba(120, 200, 255, 0.12); }
.keys td:first-child { color: var(--cyan); white-space: nowrap; }
.tips { margin: 0; padding-left: 18px; line-height: 1.5; font-size: 15px; }
.tips b { color: #fff; }
.small { color: var(--dim); font-size: 13px; }
.c-cyan { color: #62f0ff; } .c-white { color: #fff; } .c-amber { color: #ffb347; } .c-red { color: #ff5b4a; }

.set { display: grid; gap: 12px; text-align: left; min-width: min(420px, 80vw); margin-bottom: 22px; }
.set label { display: flex; justify-content: space-between; align-items: center; gap: 16px; letter-spacing: 0.08em; }
.set label.chk { justify-content: flex-start; }
.set input[type=range] { width: 55%; accent-color: var(--cyan); }
.set input[type=checkbox] { accent-color: var(--cyan); width: 18px; height: 18px; }

/* ---------- upgrade cards ---------- */
#m-upgrade { background: radial-gradient(ellipse at center, rgba(10, 6, 30, 0.55), rgba(2, 1, 8, 0.8)); }
.up-title { margin-bottom: 4px; }
.up-sub { margin: 0 0 22px; color: var(--dim); letter-spacing: 0.3em; font-size: 13px; }
.cards { display: flex; gap: 18px; flex-wrap: wrap; justify-content: center; padding: 0 16px; }
.card {
  --rc: var(--cyan);
  pointer-events: auto;
  width: 230px; min-height: 250px;
  display: flex; flex-direction: column; align-items: center; justify-content: flex-start;
  background: linear-gradient(180deg, rgba(14, 12, 40, 0.92), rgba(6, 4, 18, 0.95));
  border: 1px solid var(--rc);
  border-radius: 6px;
  padding: 18px 16px 16px;
  cursor: pointer;
  text-align: center;
  font-family: var(--font); color: var(--ink);
  box-shadow: 0 0 22px color-mix(in srgb, var(--rc) 35%, transparent), inset 0 0 22px color-mix(in srgb, var(--rc) 12%, transparent);
  opacity: 0; transform: translateY(18px) scale(0.96);
  transition: opacity 260ms var(--ease-out), transform 260ms var(--ease-out), box-shadow 160ms var(--ease-out);
}
#m-upgrade.show .card { opacity: 1; transform: none; }
#m-upgrade.show .card:nth-child(2) { transition-delay: 60ms; }
#m-upgrade.show .card:nth-child(3) { transition-delay: 120ms; }
.card:hover, .card:focus-visible {
  outline: none;
  transform: translateY(-4px) scale(1.02) !important;
  transition-delay: 0ms !important;
  box-shadow: 0 0 36px color-mix(in srgb, var(--rc) 60%, transparent), inset 0 0 30px color-mix(in srgb, var(--rc) 20%, transparent);
}
.card .rar { font-size: 11px; letter-spacing: 0.3em; color: var(--rc); }
.card .ico { font-size: 54px; line-height: 1.2; margin: 8px 0 4px; color: #fff; text-shadow: 0 0 16px var(--rc), 0 0 30px var(--rc); }
.card .nm { font-size: 20px; letter-spacing: 0.14em; font-weight: 700; margin-bottom: 8px; }
.card .ds { font-size: 14px; line-height: 1.4; color: #c6d4f0; }
.card .lv { margin-top: auto; padding-top: 10px; font-size: 12px; letter-spacing: 0.2em; color: var(--rc); }
.card .key { position: absolute; margin-top: -8px; font-size: 11px; color: var(--dim); }
@media (max-width: 760px) {
  .card { width: min(88vw, 320px); min-height: 0; padding: 12px; display: grid; grid-template-columns: 60px 1fr; text-align: left; gap: 2px 12px; }
  .card .ico { grid-row: span 3; font-size: 40px; margin: 0; align-self: center; text-align: center; }
  .cards { gap: 10px; }
}

/* ---------- game over ---------- */
.final { font-size: clamp(44px, 8vw, 84px); font-weight: 700; letter-spacing: 0.06em; color: #fff; text-shadow: 0 0 18px var(--cyan), 0 0 40px rgba(98, 240, 255, 0.5); }
.newbest { color: var(--gold); letter-spacing: 0.3em; min-height: 1.2em; margin: 4px 0 14px; text-shadow: 0 0 12px var(--gold); }
.stats { display: grid; grid-template-columns: repeat(3, minmax(120px, 1fr)); gap: 10px 18px; text-align: left; }
@media (max-width: 600px) { .stats { grid-template-columns: repeat(2, 1fr); } }
.stat { border-left: 2px solid var(--line); padding: 2px 10px; }
.stat .k { font-size: 11px; letter-spacing: 0.2em; color: var(--dim); }
.stat .v { font-size: 22px; color: #fff; }
.tricks { grid-column: 1 / -1; font-size: 13px; color: #c6d4f0; letter-spacing: 0.08em; line-height: 1.7; }
.tricks span { display: inline-block; margin: 0 10px 0 0; }
.tricks b { color: var(--gold); }

/* ---------- sandbox ---------- */
.sandbox {
  position: absolute; right: 12px; top: 90px;
  width: 210px;
  background: var(--panel); border: 1px solid var(--line); border-radius: 6px;
  padding: 10px; display: none; pointer-events: auto;
  max-height: calc(100dvh - 110px); overflow: auto;
}
.sandbox.show { display: block; }
.sandbox h3 { margin: 0 0 8px; }
.grid-btns { display: grid; grid-template-columns: 1fr 1fr; gap: 5px; margin-bottom: 8px; }
.sb-row { display: flex; gap: 5px; flex-wrap: wrap; margin-bottom: 8px; }
.sandbox select { width: 100%; background: #0b0f25; color: var(--ink); border: 1px solid var(--line); padding: 5px; margin-bottom: 8px; font-family: var(--font); }

/* ---------- touch ---------- */
.touch { position: absolute; right: 0; bottom: 0; display: none; pointer-events: none; padding: 0 max(18px, env(safe-area-inset-right)) max(18px, env(safe-area-inset-bottom)) 0; }
body.touchmode.playing .touch { display: grid; grid-template-columns: auto auto; grid-template-rows: auto auto; gap: 14px; }
.tbtn {
  pointer-events: auto;
  width: 78px; height: 78px; border-radius: 50%;
  background: rgba(10, 20, 50, 0.45); color: var(--ink);
  border: 2px solid rgba(98, 240, 255, 0.6);
  font-family: var(--font); font-size: 13px; letter-spacing: 0.1em;
  touch-action: none;
}
.tbtn.on { background: rgba(98, 240, 255, 0.35); box-shadow: 0 0 20px var(--cyan); }
.t-extend { grid-column: 2; grid-row: 2; width: 96px; height: 96px; border-color: var(--gold); }
.t-dash { grid-column: 1; grid-row: 2; align-self: end; }
.t-nova { grid-column: 2; grid-row: 1; justify-self: center; width: 64px; height: 64px; border-color: var(--violet); }
.pause-btn {
  position: absolute; top: max(10px, env(safe-area-inset-top)); left: 50%; transform: translateX(-50%);
  display: none; pointer-events: auto;
  width: 40px; height: 32px; border-radius: 4px;
  background: rgba(10, 20, 50, 0.4); color: var(--ink); border: 1px solid var(--line);
  font-family: var(--font); letter-spacing: 0.1em;
}
body.touchmode.playing .pause-btn { display: block; top: auto; bottom: max(10px, env(safe-area-inset-bottom)); left: 50%; }

.err { position: absolute; left: 16px; right: 16px; top: 16px; color: #ff8080; font-size: 14px; white-space: pre-wrap; pointer-events: auto; display: none; }
.err.show { display: block; background: rgba(0, 0, 0, 0.8); padding: 12px; border: 1px solid #ff5050; }
.errtoast {
  position: absolute; left: 12px; bottom: 12px; max-width: min(420px, 80vw);
  font-size: 11px; color: #ffb0b0; background: rgba(20, 0, 5, 0.7); border: 1px solid rgba(255, 80, 80, 0.5);
  padding: 6px 8px; border-radius: 3px; opacity: 0; transition: opacity 200ms ease; pointer-events: none;
}
.errtoast.show { opacity: 1; }

/* short screens (phones in landscape): compact title menu in a row */
@media (max-height: 560px) {
  .title-spacer { height: 50vh; }
  #m-title .stack { flex-direction: row; flex-wrap: wrap; justify-content: center; gap: 8px; max-width: 560px; }
  #m-title .stack .btn { padding: 8px 14px; font-size: 14px; letter-spacing: 0.14em; }
  #m-title .stack .btn.big { flex-basis: 100%; font-size: 19px; padding: 9px 20px; }
  .best { margin-top: 8px; font-size: 13px; }
  .tag { display: none; }
  .panel { padding: 16px 20px 18px; }
  h2 { margin-bottom: 10px; }
  .card { min-height: 0; }
  .up-sub { margin-bottom: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  .menu, .menu.show, .card, .btn { transition-duration: 1ms !important; transition-delay: 0ms !important; }
}