:root {
  --bg: #02060f;
  --panel: #0f172a;
  --panel-2: #131d33;
  --line: #24324a;
  --line-2: #334155;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --dim: #64748b;
  --teal: #14b8a6;
  --teal-2: #2dd4bf;
  --teal-3: #5eead4;
  --amber: #f59e0b;
  --amber-2: #fbbf24;
  --red: #ef4444;
  --radius: 14px;
  --shadow: 0 30px 80px rgba(0, 0, 0, .55), 0 0 0 1px rgba(148, 163, 184, .08);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: "Rajdhani", "Segoe UI", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  user-select: none;
  -webkit-user-select: none;
  touch-action: none;
}

#screen, #screen3d {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  display: block;
}

button { font: inherit; color: inherit; cursor: pointer; }

/* ---------- toolbar ---------- */

.toolbar {
  position: fixed;
  top: 50%;
  right: 14px;
  transform: translateY(-50%);
  display: none;
  flex-direction: column;
  gap: 8px;
  z-index: 5;
}
body.playing .toolbar { display: flex; }

.tool {
  min-width: 40px;
  height: 40px;
  padding: 0 12px;
  border-radius: 10px;
  border: 1px solid rgba(148, 163, 184, .18);
  background: rgba(15, 23, 42, .7);
  backdrop-filter: blur(6px);
  color: var(--muted);
  font-weight: 700;
  letter-spacing: .06em;
  font-size: 13px;
  transition: color .15s, border-color .15s, background .15s;
}
.tool:hover { color: var(--teal-3); border-color: rgba(45, 212, 191, .5); }
.tool:focus-visible { outline: 2px solid var(--teal-2); outline-offset: 2px; }
.tool.icon { padding: 0; display: grid; place-items: center; }
.tool svg { width: 18px; height: 18px; fill: currentColor; }
.tool .snd-off { display: none; }
.tool.off .snd-on { display: none; }
.tool.off .snd-off { display: block; }
.tool.off { color: var(--red); }

/* ---------- touch ---------- */

.touch { display: none; }
@media (pointer: coarse) {
  body.playing .touch {
    position: fixed;
    left: 0; right: 0; bottom: 0;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    padding: 0 16px calc(16px + env(safe-area-inset-bottom));
    z-index: 4;
    pointer-events: none;
  }
  body.playing .toolbar { top: 16px; transform: none; flex-direction: row; right: 16px; }
}
.touch-group { display: flex; gap: 12px; align-items: flex-end; pointer-events: auto; }
.tbtn {
  width: 64px; height: 64px;
  border-radius: 50%;
  border: 1px solid rgba(148, 163, 184, .25);
  background: rgba(15, 23, 42, .55);
  color: var(--text);
  font-size: 22px;
  touch-action: none;
}
.tbtn.fire { color: var(--teal-3); border-color: rgba(45, 212, 191, .4); font-size: 13px; font-weight: 700; letter-spacing: .08em; }
.tbtn.big { width: 78px; height: 78px; font-size: 15px; margin-bottom: 18px; }
.tbtn.small { width: 48px; height: 48px; font-size: 18px; }
.touch-pad {
  display: grid;
  grid-template-columns: 56px 56px 56px;
  grid-template-rows: 56px 56px 56px;
  pointer-events: auto;
}
.touch-pad .tbtn { width: 56px; height: 56px; border-radius: 14px; font-size: 18px; }
.touch-pad .up { grid-column: 2; grid-row: 1; }
.touch-pad .left { grid-column: 1; grid-row: 2; }
.touch-pad .right { grid-column: 3; grid-row: 2; }
.touch-pad .down { grid-column: 2; grid-row: 3; }
.tbtn.down { background: rgba(45, 212, 191, .3); }

/* ---------- modals ---------- */

.overlay {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 16px;
  background: radial-gradient(ellipse at center, rgba(2, 6, 15, .35), rgba(2, 6, 15, .75));
  opacity: 0;
  visibility: hidden;
  transition: opacity .25s ease, visibility .25s;
  z-index: 10;
  overflow-y: auto;
}
.overlay.show { opacity: 1; visibility: visible; }

.modal {
  width: min(820px, 100%);
  background: linear-gradient(180deg, rgba(19, 29, 51, .92), rgba(11, 18, 34, .94));
  backdrop-filter: blur(10px);
  border: 1px solid rgba(148, 163, 184, .14);
  border-radius: 20px;
  box-shadow: var(--shadow);
  padding: 28px 30px 24px;
  transform: translateY(12px) scale(.98);
  transition: transform .3s cubic-bezier(.2, .9, .3, 1.2);
  user-select: text;
}
.overlay.show .modal { transform: none; }
.modal.small { width: min(420px, 100%); text-align: center; }

.brand-row { display: flex; align-items: center; gap: 16px; }
.brand-mark { width: 56px; height: 56px; flex: none; filter: drop-shadow(0 0 12px rgba(45, 212, 191, .35)); }
h1 {
  margin: 0;
  font-family: "Orbitron", "Segoe UI", sans-serif;
  font-weight: 800;
  font-size: clamp(30px, 6vw, 46px);
  letter-spacing: .14em;
  line-height: 1;
  background: linear-gradient(180deg, #f8fafc 20%, #5eead4);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.tag { margin: 6px 0 0; color: var(--muted); font-size: 16px; font-weight: 600; letter-spacing: .04em; }

.section-title {
  margin: 22px 0 10px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--dim);
}

.modes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.mode-card {
  text-align: left;
  padding: 0;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: rgba(2, 6, 15, .45);
  overflow: hidden;
  transition: border-color .2s, transform .2s, box-shadow .2s;
}
.mode-card:hover { transform: translateY(-2px); border-color: var(--line-2); }
.mode-card:focus-visible { outline: 2px solid var(--teal-2); outline-offset: 2px; }
.mode-card.selected {
  border-color: var(--teal-2);
  box-shadow: 0 0 0 1px var(--teal-2), 0 12px 40px rgba(20, 184, 166, .18);
}
.thumb { aspect-ratio: 16 / 9; border-bottom: 1px solid var(--line); position: relative; }
.thumb svg { display: block; width: 100%; height: 100%; }
.mode-card.selected .thumb::after {
  content: "SELECTED";
  position: absolute;
  top: 10px; right: 10px;
  padding: 3px 8px;
  border-radius: 6px;
  background: var(--teal);
  color: #04201d;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .14em;
}
.mode-body { padding: 12px 16px 14px; }
.mode-name {
  font-family: "Orbitron", "Segoe UI", sans-serif;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: .08em;
  display: flex;
  align-items: center;
  gap: 8px;
}
.mode-body p { margin: 6px 0 0; color: var(--muted); font-size: 15px; line-height: 1.35; font-weight: 500; }

.how { display: grid; grid-template-columns: 1.25fr 1fr; gap: 0 24px; }
.how .section-title { grid-column: 1 / -1; }
.rules { margin: 0; padding: 0 0 0 18px; color: var(--muted); font-size: 15px; line-height: 1.45; font-weight: 500; }
.rules li { margin-bottom: 4px; }
.rules li::marker { color: var(--teal-2); }
.rules b { color: var(--text); }
.rules b.amber { color: var(--amber-2); }
.keys { display: grid; gap: 7px; align-content: start; font-size: 14px; color: var(--muted); }
.keys em { font-style: normal; margin: 0 10px 0 6px; color: var(--text); font-weight: 600; }

.kbd {
  display: inline-block;
  min-width: 22px;
  padding: 1px 6px;
  margin-right: 3px;
  border-radius: 5px;
  border: 1px solid var(--line-2);
  border-bottom-width: 2px;
  background: #0b1222;
  color: var(--text);
  font-family: "Rajdhani", "Segoe UI", sans-serif;
  font-size: 12px;
  font-weight: 700;
  text-align: center;
  line-height: 18px;
}
.kbd.light { background: rgba(4, 32, 29, .25); border-color: rgba(4, 32, 29, .35); color: #04201d; margin: 0 0 0 8px; }

.actions {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.hi { color: var(--muted); font-size: 14px; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; }
.hi b { margin-left: 8px; font-family: "Orbitron", sans-serif; color: var(--amber-2); font-size: 18px; letter-spacing: .06em; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 46px;
  padding: 0 22px;
  border-radius: 12px;
  border: 1px solid var(--line-2);
  background: rgba(30, 41, 59, .7);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .05em;
  transition: background .15s, border-color .15s, transform .1s, box-shadow .15s;
}
.btn:hover { border-color: var(--teal-2); }
.btn:active { transform: translateY(1px); }
.btn:focus-visible { outline: 2px solid var(--teal-3); outline-offset: 3px; }
.btn.primary {
  border: 0;
  background: linear-gradient(180deg, var(--teal-3), var(--teal));
  color: #04201d;
  box-shadow: 0 8px 24px rgba(20, 184, 166, .3);
}
.btn.primary:hover { box-shadow: 0 10px 30px rgba(20, 184, 166, .45); }
.btn.ghost { background: transparent; color: var(--muted); }

.modal h2 {
  margin: 0 0 18px;
  font-family: "Orbitron", "Segoe UI", sans-serif;
  font-weight: 800;
  font-size: 26px;
  letter-spacing: .14em;
  text-transform: uppercase;
}
.stats { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 20px; }
.stats.three { grid-template-columns: 1fr 1fr 1fr; }
.stats div {
  padding: 12px 8px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(2, 6, 15, .4);
}
.stats span { display: block; font-size: 11px; letter-spacing: .2em; text-transform: uppercase; color: var(--dim); font-weight: 700; }
.stats b { display: block; margin-top: 4px; font-family: "Orbitron", sans-serif; font-size: 20px; color: var(--text); }
.stack { display: grid; gap: 10px; }
.badge {
  display: inline-block;
  margin: -6px 0 16px;
  padding: 5px 12px;
  border-radius: 999px;
  background: rgba(245, 158, 11, .14);
  border: 1px solid rgba(245, 158, 11, .5);
  color: var(--amber-2);
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  font-size: 12px;
}
.badge[hidden] { display: none; }

@media (max-width: 720px) {
  .modal { padding: 20px 18px 18px; }
  .modes { grid-template-columns: repeat(3, 1fr); gap: 8px; }
  .mode-name .kbd { display: none; }
  .mode-body p { display: none; }
  .how { grid-template-columns: 1fr; }
  .keys { margin-top: 10px; }
  .actions { flex-direction: column-reverse; align-items: stretch; }
  .btn.primary { width: 100%; }
  .hi { text-align: center; }
}
@media (pointer: coarse) { .keys { display: none; } }
@media (max-height: 760px) and (min-width: 721px) {
  .modal.menu { padding: 20px 26px 18px; }
  .section-title { margin: 14px 0 8px; }
  .mode-body p { font-size: 14px; }
}

.mode-name .new {
  margin-left: 8px;
  padding: 2px 7px;
  border-radius: 6px;
  background: rgba(245, 158, 11, .16);
  border: 1px solid rgba(245, 158, 11, .5);
  color: var(--amber-2);
  font-family: "Rajdhani", "Segoe UI", sans-serif;
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  vertical-align: middle;
}
@media (max-width: 720px) { .mode-name .new { display: none; } }

.credits {
  margin: 14px 0 0;
  text-align: center;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--dim);
}
.credits a { color: var(--muted); text-decoration: none; border-bottom: 1px solid rgba(148, 163, 184, .35); }
.credits a:hover { color: var(--teal-3); border-color: var(--teal-3); }