:root {
  --bg: #05050b;
  --fg: #f4f4fa;
  --muted: #a3a3b8;
  --panel: #161622;
  --line: rgba(255, 255, 255, 0.12);
  --accent: #00e5ff;
  --accent-fg: #001318;
  --safe-t: env(safe-area-inset-top, 0px);
  --safe-b: env(safe-area-inset-bottom, 0px);
  --safe-l: env(safe-area-inset-left, 0px);
  --safe-r: env(safe-area-inset-right, 0px);
  --font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
[data-theme="pastel"] { --bg: #1c1a26; --accent: #cdb4ff; --accent-fg: #1c1a26; --panel: #262334; }
[data-theme="contrast"] { --bg: #000; --accent: #ffd500; --accent-fg: #000; --panel: #000; --line: #fff; --muted: #e6e6e6; }

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

html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  /* no scrolling, zooming, pull-to-refresh, selection or callouts */
  touch-action: none;
  overscroll-behavior: none;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
  -webkit-tap-highlight-color: transparent;
  -webkit-text-size-adjust: 100%;
}

#stage {
  z-index: 0;
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
}

/* ---- overlay text ---- */

#overlay {
  z-index: 1;
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: calc(var(--safe-t) + 5rem) calc(var(--safe-r) + 2rem) calc(var(--safe-b) + 3rem) calc(var(--safe-l) + 2rem);
  pointer-events: none;
  text-align: center;
  transition: opacity 200ms;
}
.sheet-open #overlay { opacity: 0; }

.msg {
  margin: 0;
  max-width: 22ch;
  font-size: clamp(1.4rem, 6.5vw, 2.2rem);
  font-weight: 700;
  line-height: 1.2;
  text-wrap: balance;
  text-shadow: 0 2px 14px rgba(0, 0, 0, 0.75), 0 0 2px rgba(0, 0, 0, 0.9);
}
.msg.hint { color: var(--muted); font-weight: 600; font-size: clamp(1.2rem, 5.5vw, 1.8rem); }
.msg.soft { color: var(--muted); font-weight: 600; font-size: clamp(1rem, 4.5vw, 1.4rem); }
.msg.count { font-size: clamp(3rem, 18vw, 6rem); font-weight: 800; opacity: 0.35; }
.msg.alert { font-size: clamp(1.5rem, 7vw, 2.4rem); }
.msg.result { font-size: clamp(1.8rem, 9vw, 3.2rem); font-weight: 800; }
.msg.in { animation: msg-in 380ms cubic-bezier(0.2, 1.4, 0.4, 1); }

.msg-sub {
  margin: 0;
  min-height: 1.4em;
  max-width: 32ch;
  color: var(--fg);
  opacity: 0.75;
  font-size: clamp(0.95rem, 4vw, 1.1rem);
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.9);
}

@keyframes msg-in {
  from { transform: scale(0.7); opacity: 0; }
  to { transform: none; opacity: 1; }
}

/* ---- toolbar: top centre, away from the side-edge back gesture ---- */

#toolbar {
  z-index: 2;
  position: fixed;
  top: calc(var(--safe-t) + 14px);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  transition: opacity 200ms, transform 200ms;
}
#toolbar.hidden { opacity: 0; transform: translate(-50%, -8px); pointer-events: none; }

.tool {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.06);
  color: var(--fg);
  display: grid;
  place-items: center;
  padding: 0;
  cursor: pointer;
  touch-action: manipulation;
}
.tool:active { background: rgba(255, 255, 255, 0.16); }
.tool:focus-visible, .sheet-body button:focus-visible, .sheet-close:focus-visible, #stake-input:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}
.tool svg { width: 24px; height: 24px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.tool .off { display: none; }
#btn-sound.is-muted .on, #btn-fullscreen.is-full .on { display: none; }
#btn-sound.is-muted .off, #btn-fullscreen.is-full .off { display: inline; }

/* ---- settings sheet ---- */

#sheet-backdrop {
  z-index: 3;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  opacity: 0;
  transition: opacity 220ms;
}
.sheet-open #sheet-backdrop { opacity: 1; }

#sheet {
  z-index: 4;
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  margin: 0 auto;
  max-width: 520px;
  max-height: calc(100% - var(--safe-t) - 24px);
  display: flex;
  flex-direction: column;
  background: var(--panel);
  border: 1px solid var(--line);
  border-bottom: 0;
  border-radius: 22px 22px 0 0;
  box-shadow: 0 -12px 40px rgba(0, 0, 0, 0.5);
  transform: translateY(100%);
  transition: transform 240ms cubic-bezier(0.2, 0.9, 0.3, 1);
  user-select: none;
  outline: none;
}
.sheet-open #sheet { transform: none; }

.sheet-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px 8px;
}
.sheet-head h2 { margin: 0; font-size: 1.15rem; }
.sheet-close {
  font: inherit;
  font-weight: 700;
  color: var(--accent-fg);
  background: var(--accent);
  border: 0;
  border-radius: 999px;
  min-height: 40px;
  padding: 0 18px;
  cursor: pointer;
}

.sheet-body {
  overflow-y: auto;
  touch-action: pan-y;
  overscroll-behavior: contain;
  padding: 4px 24px calc(var(--safe-b) + 20px);
}

.field { padding: 12px 0; border-top: 1px solid var(--line); }
.field:first-child { border-top: 0; }
.field h3 { margin: 0 0 10px; font-size: 0.8rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); }
.field.row { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.field.row h3 { margin: 0; }
.field[hidden] { display: none; }
.desc { margin: 8px 0 0; color: var(--muted); font-size: 0.9rem; }

.seg { display: flex; gap: 6px; flex-wrap: wrap; }
.seg button, .chip, .stepper button {
  font: inherit;
  font-size: 0.95rem;
  color: var(--fg);
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid var(--line);
  border-radius: 999px;
  min-height: 44px;
  padding: 0 16px;
  cursor: pointer;
  touch-action: manipulation;
}
.seg button[aria-pressed="true"], .chip[aria-pressed="true"] {
  background: var(--accent);
  color: var(--accent-fg);
  border-color: var(--accent);
  font-weight: 700;
}

.stepper { display: flex; align-items: center; gap: 6px; }
.stepper button { width: 44px; padding: 0; font-size: 1.3rem; }
.stepper output { min-width: 2ch; text-align: center; font-size: 1.2rem; font-weight: 700; }

.stake-row { display: flex; gap: 8px; }
#stake-input {
  flex: 1;
  min-width: 0;
  min-height: 44px;
  font: inherit;
  font-size: 1rem; /* ≥16px stops iOS zooming on focus */
  color: var(--fg);
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0 14px;
  user-select: text;
  -webkit-user-select: text;
  touch-action: manipulation;
}
#stake-input::placeholder { color: var(--muted); opacity: 0.7; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.chip { min-height: 38px; font-size: 0.9rem; }

[data-theme="contrast"] .seg button,
[data-theme="contrast"] .chip,
[data-theme="contrast"] .stepper button,
[data-theme="contrast"] #stake-input { border-width: 2px; background: #000; }

/* ---- debug ---- */

#debug-hud {
  z-index: 5;
  position: fixed;
  bottom: calc(var(--safe-b) + 8px);
  left: 50%;
  transform: translateX(-50%);
  font: 12px/1.4 ui-monospace, monospace;
  color: #8f8;
  background: rgba(0, 0, 0, 0.6);
  padding: 4px 10px;
  border-radius: 6px;
  pointer-events: none;
  white-space: nowrap;
}

@media (prefers-reduced-motion: reduce) {
  .msg.in { animation-duration: 1ms; }
  #sheet, #toolbar, #sheet-backdrop { transition-duration: 1ms; }
}