:root {
  --bg: #f5f3ef;
  --card: #ffffff;
  --text: #1c1b1a;
  --muted: #76716a;
  --line: #e6e2dc;
  --track: #efebe5;
  --warn-bg: #fff4d6;
  --warn-text: #7a5600;
  --radius: 14px;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16161a;
    --card: #222227;
    --text: #ecebe8;
    --muted: #9a978f;
    --line: #34343a;
    --track: #2d2d33;
    --warn-bg: #3a2f12;
    --warn-text: #f3cf73;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.4 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-tap-highlight-color: transparent;
}
button, input { font: inherit; color: inherit; }

.app {
  max-width: 460px;
  margin: 0 auto;
  padding: max(12px, env(safe-area-inset-top)) 12px max(16px, env(safe-area-inset-bottom));
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.game { display: flex; flex-direction: column; gap: 10px; }

.top { display: flex; align-items: center; justify-content: space-between; }
h1 { margin: 0; font-size: 1.3rem; letter-spacing: -0.01em; display: flex; align-items: center; gap: 6px; }
.reset {
  border: 1px solid var(--line); background: var(--card); border-radius: 999px;
  padding: 4px 12px; font-size: 0.8rem; cursor: pointer; color: var(--muted);
}
.reset.armed { background: #d33; border-color: #d33; color: #fff; }
.reset:disabled { opacity: 0.4; cursor: default; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px;
}
.label {
  font-size: 0.7rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.05em; color: var(--muted);
}

/* Setup */
.setup { display: flex; flex-wrap: wrap; align-items: flex-start; gap: 8px 18px; }
.field { display: flex; flex-direction: column; gap: 4px; }
.row { display: flex; gap: 6px; }
.setup input {
  height: 34px; border: 1px solid var(--line); border-radius: 8px;
  background: var(--bg); text-align: center; font-size: 16px; /* 16px avoids iOS zoom */
}
.setup input:focus { outline: 2px solid #6a3d9a; outline-offset: -1px; }
.setup input.base { width: 70px; }
.scratch { display: flex; flex-direction: column; align-items: center; }
.scratch input { width: 40px; }
.scratch small { font-size: 0.65rem; color: var(--muted); line-height: 1.1; }

.alert {
  margin: 0; padding: 10px 12px; border-radius: var(--radius);
  background: var(--warn-bg); color: var(--warn-text); font-size: 0.9rem;
}

/* Stats */
.stats { display: grid; grid-template-columns: 1fr 0.7fr 1.3fr; gap: 8px; }
.stat {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 8px 10px; display: flex; flex-direction: column; gap: 2px; min-width: 0;
}
.stat strong {
  font-size: 1.25rem; font-variant-numeric: tabular-nums;
  display: flex; align-items: center; gap: 6px; white-space: nowrap;
}

.banner {
  border-radius: var(--radius); padding: 10px; text-align: center;
  font-weight: 700; font-size: 1.05rem;
}

/* Roll pad */
.pad { display: grid; grid-template-columns: repeat(6, 1fr); gap: 6px; padding: 8px; }
.key {
  aspect-ratio: 1 / 0.85; border: 0; border-radius: 10px; cursor: pointer;
  font-size: 1.2rem; font-weight: 700; font-variant-numeric: tabular-nums;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  line-height: 1; transition: transform 0.06s, filter 0.1s;
  touch-action: manipulation;
}
.key:active:not(:disabled) { transform: scale(0.93); filter: brightness(0.9); }
.key:disabled { opacity: 0.35; cursor: default; }
.key.scratched, .key.undo { background: var(--track); color: var(--muted); }
.key.scratched small { font-size: 0.65rem; font-weight: 600; margin-top: 3px; }

/* History */
.history {
  display: flex; gap: 5px; overflow-x: auto; scrollbar-width: none;
  min-height: 28px; align-items: center; padding: 0 2px;
  mask-image: linear-gradient(to right, #000 85%, transparent);
}
.history::-webkit-scrollbar { display: none; }
.empty { color: var(--muted); font-size: 0.8rem; font-style: italic; }

.chip {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 26px; height: 24px; padding: 0 7px; border-radius: 999px;
  font-size: 0.8rem; font-weight: 700; flex-shrink: 0; font-variant-numeric: tabular-nums;
}
.chip.faded { opacity: 0.45; }
.stat .chip { font-size: 0.85rem; }

/* Track */
.track { display: flex; flex-direction: column; gap: 6px; }
.lane { display: grid; grid-template-columns: 30px 1fr 74px; align-items: center; gap: 8px; }
.bar { position: relative; height: 22px; background: var(--track); border-radius: 6px; overflow: hidden; }
.fill { height: 100%; border-radius: 6px; transition: width 0.25s ease; }
.left {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: flex-end;
  padding-right: 8px; font-size: 0.72rem; color: var(--muted);
}
.pct { text-align: right; font-size: 0.85rem; font-variant-numeric: tabular-nums; color: var(--muted); }
.lane.top .pct { color: var(--text); font-weight: 700; }

footer { text-align: center; font-size: 0.75rem; color: var(--muted); padding-top: 4px; }
footer a { color: inherit; }

@media (max-width: 360px) {
  .stat strong { font-size: 1.05rem; }
  .key { font-size: 1.05rem; }
}