*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --color-bg-1: #0a0e1a;
  --color-bg-2: #141b2d;
  --color-surface: rgba(255, 255, 255, 0.04);
  --color-surface-strong: rgba(255, 255, 255, 0.08);
  --color-border: rgba(255, 255, 255, 0.08);
  --color-text: #f5f5f7;
  --color-text-muted: #94a3b8;
  --color-accent: #2dd4bf;
  --color-accent-strong: #5eead4;

  --win: #22c55e;
  --win-soft: rgba(34, 197, 94, 0.16);
  --loss: #ef4444;
  --loss-soft: rgba(239, 68, 68, 0.16);
  --tie: #94a3b8;
  --tie-soft: rgba(148, 163, 184, 0.16);

  --radius: 14px;
  --radius-lg: 20px;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 32px rgba(0, 0, 0, 0.35);
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: radial-gradient(ellipse at top, var(--color-bg-2), var(--color-bg-1));
  color: var(--color-text);
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

header {
  text-align: center;
  padding: 3rem 1.5rem 0.5rem;
}

header h1 {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #ffffff 0%, var(--color-accent-strong) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.subtitle {
  color: var(--color-text-muted);
  margin: 0.5rem auto 0;
  max-width: 32rem;
  font-size: 1rem;
}

main {
  max-width: 560px;
  margin: 0 auto;
  padding: 1.5rem 1.5rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* --- Arena --- */

.arena {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  padding: 2rem 1.5rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.hands {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(1.5rem, 8vw, 3rem);
}

.hand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  min-width: 5rem;
}

.hand-emoji {
  font-size: clamp(3rem, 16vw, 4.5rem);
  line-height: 1;
}

.hand-emoji.thinking {
  animation: wobble 0.3s infinite ease-in-out;
}

@keyframes wobble {
  0%, 100% { transform: translateY(0) rotate(-6deg); }
  50% { transform: translateY(-6px) rotate(6deg); }
}

.hand-label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
}

.vs {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-text-muted);
  text-transform: uppercase;
}

.result {
  font-size: 1.35rem;
  font-weight: 700;
  min-height: 1.6em;
  transition: color var(--transition);
}

.result--win { color: var(--win); }
.result--loss { color: var(--loss); }
.result--tie { color: var(--tie); }

.prediction {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  min-height: 1.3em;
  text-align: center;
}

/* --- Move buttons --- */

.moves {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

.move-btn {
  font: inherit;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  padding: 1.1rem 0.5rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text);
  cursor: pointer;
  transition: transform var(--transition), border-color var(--transition),
    background var(--transition), box-shadow var(--transition);
  -webkit-tap-highlight-color: transparent;
}

.move-emoji {
  font-size: clamp(2rem, 11vw, 2.75rem);
  line-height: 1;
}

.move-name {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

/* Hover effects only on devices with a real pointer. On touchscreens :hover
   "sticks" after a tap, leaving the button looking selected. */
@media (hover: hover) {
  .move-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    border-color: rgba(45, 212, 191, 0.5);
    background: rgba(45, 212, 191, 0.08);
    box-shadow: 0 0 0 1px rgba(45, 212, 191, 0.35), 0 10px 30px rgba(45, 212, 191, 0.18);
  }
}

/* Press feedback that works on touch and never sticks (clears on release). */
.move-btn:active:not(:disabled) {
  transform: translateY(0);
  border-color: rgba(45, 212, 191, 0.5);
  background: rgba(45, 212, 191, 0.08);
}

.move-btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(45, 212, 191, 0.3);
}

.moves.locked .move-btn {
  opacity: 0.55;
  cursor: progress;
}

/* --- Stats --- */

.stats {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1.5rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.scoreboard {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

.score {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.15rem;
  padding: 0.85rem 0.5rem;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}

.score--win { background: var(--win-soft); }
.score--tie { background: var(--tie-soft); }
.score--loss { background: var(--loss-soft); }

.score-num {
  font-size: 1.75rem;
  font-weight: 800;
  line-height: 1;
}

.score--win .score-num { color: var(--win); }
.score--tie .score-num { color: var(--tie); }
.score--loss .score-num { color: var(--loss); }

.score-label {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
}

.score-pct {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

.bar {
  display: flex;
  height: 14px;
  width: 100%;
  border-radius: 999px;
  overflow: hidden;
  background: rgba(0, 0, 0, 0.3);
}

.bar-seg {
  height: 100%;
  width: 0;
  transition: width var(--transition);
}

.bar-seg--win { background: var(--win); }
.bar-seg--tie { background: var(--tie); }
.bar-seg--loss { background: var(--loss); }

.meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.meta span { white-space: nowrap; }

/* --- History --- */

.history-section {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.history-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.history-actions {
  display: flex;
  gap: 0.5rem;
}

.history-head h2 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.ghost-button {
  font: inherit;
  background: var(--color-surface-strong);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.45rem 0.9rem;
  cursor: pointer;
  font-weight: 500;
  font-size: 0.85rem;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}

@media (hover: hover) {
  .ghost-button:hover {
    background: var(--color-surface-strong);
    border-color: rgba(45, 212, 191, 0.4);
    color: var(--color-accent-strong);
  }
  /* Reset is destructive -- keep its red hover. */
  #reset:hover {
    background: rgba(239, 68, 68, 0.15);
    border-color: rgba(239, 68, 68, 0.4);
    color: #fca5a5;
  }
}

.history {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.round {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 0.5rem 0.9rem;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  border-left-width: 4px;
  background: var(--color-surface);
  animation: slideIn 0.25s var(--transition);
}

.round-main {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.round-pred {
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

@keyframes slideIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.round--win { border-left-color: var(--win); background: var(--win-soft); }
.round--loss { border-left-color: var(--loss); background: var(--loss-soft); }
.round--tie { border-left-color: var(--tie); background: var(--tie-soft); }

.round-pair {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.4rem;
}

.round-vs {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--color-text-muted);
  text-transform: uppercase;
}

.round-outcome {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.round--win .round-outcome { color: var(--win); }
.round--loss .round-outcome { color: var(--loss); }
.round--tie .round-outcome { color: var(--tie); }

/* --- Recent-throw pills (horizontally scrollable quick reference) --- */

.pills-section[hidden] { display: none; }

.pills {
  list-style: none;
  display: flex;
  gap: 0.4rem;
  overflow-x: auto;
  padding: 0.15rem 0.1rem 0.4rem;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.pill {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  padding: 0.3rem 0.5rem;
  border-radius: 10px;
  border: 1px solid var(--color-border);
  border-bottom-width: 3px;
  background: var(--color-surface);
  line-height: 1;
}

.pill--win { border-bottom-color: var(--win); background: var(--win-soft); }
.pill--loss { border-bottom-color: var(--loss); background: var(--loss-soft); }
.pill--tie { border-bottom-color: var(--tie); background: var(--tie-soft); }

.pill-you { font-size: 1.2rem; }
.pill-ai { font-size: 1.2rem; opacity: 0.8; }

/* --- "View statistics" link relocated to the bottom of the stats card --- */

.stats-link {
  align-self: center;
  margin-top: 0.25rem;
}

.empty-hint {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  text-align: center;
  padding: 0.5rem 0;
}

.empty-hint[hidden] { display: none; }

footer {
  max-width: 560px;
  margin: 0 auto;
  padding: 1rem 1.5rem 3rem;
  text-align: center;
}

footer p {
  color: var(--color-text-muted);
  font-size: 0.8rem;
  line-height: 1.6;
}

@media (max-width: 420px) {
  header { padding: 2rem 1rem 0.25rem; }
  header h1 { font-size: 1.85rem; }
  main { padding: 1rem; gap: 1.25rem; }
  .arena { padding: 1.5rem 1rem; }
  .stats { padding: 1.25rem; }
  .score-num { font-size: 1.5rem; }
}

/* --- Navigation (shared) --- */

.topnav {
  display: flex;
  justify-content: center;
  margin-top: 0.85rem;
}

.nav-link {
  color: var(--color-accent-strong);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.4rem 0.9rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  transition: background var(--transition), border-color var(--transition);
}

@media (hover: hover) {
  .nav-link:hover {
    background: rgba(45, 212, 191, 0.12);
    border-color: rgba(45, 212, 191, 0.4);
  }
}

/* --- Statistics page --- */

.empty-state {
  text-align: center;
  color: var(--color-text-muted);
  padding: 3rem 1rem;
  font-size: 1.05rem;
}

.empty-state a { color: var(--color-accent-strong); }
.empty-state[hidden],
#stats-content[hidden] { display: none; }

#stats-content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

.card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  padding: 1rem 0.6rem;
  text-align: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.card-value {
  font-size: 1.4rem;
  font-weight: 800;
  line-height: 1.1;
}

.card--win .card-value { color: var(--win); }
.card--loss .card-value { color: var(--loss); }

.card-label {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
}

.card-sub {
  font-size: 0.72rem;
  color: var(--color-text-muted);
}

.panel {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1.5rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.panel h2 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.panel-note {
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.legend {
  display: flex;
  gap: 0.9rem;
  flex-wrap: wrap;
}

.legend-item {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-text-muted);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.legend-item::before {
  content: "";
  width: 14px;
  height: 3px;
  border-radius: 2px;
  background: currentColor;
}

.legend--win { color: var(--win); }
.legend--tie { color: var(--tie); }
.legend--loss { color: var(--loss); }
.legend--confidence { color: var(--color-accent); }

.chart-wrap { width: 100%; }

.chart {
  width: 100%;
  height: auto;
  display: block;
  overflow: visible;
}

.chart-grid {
  stroke: rgba(255, 255, 255, 0.08);
  stroke-width: 1;
}

.chart-axis {
  fill: var(--color-text-muted);
  font-size: 12px;
}

.chart-line {
  fill: none;
  stroke-width: 2.5;
  stroke-linejoin: round;
  stroke-linecap: round;
  vector-effect: non-scaling-stroke;
}

.chart-line--win { stroke: var(--win); }
.chart-line--tie { stroke: var(--tie); }
.chart-line--loss { stroke: var(--loss); }
.chart-line--confidence { stroke: var(--color-accent); }

.split-legend {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
  font-size: 0.85rem;
}

.split-item {
  color: var(--color-text-muted);
}

.split-item strong { font-size: 1rem; }
.split-item--win strong { color: var(--win); }
.split-item--tie strong { color: var(--tie); }
.split-item--loss strong { color: var(--loss); }

.move-dist {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.dist-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.dist-label {
  width: 6.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  flex: 0 0 auto;
}

.dist-track {
  flex: 1;
  height: 12px;
  background: rgba(0, 0, 0, 0.3);
  border-radius: 999px;
  overflow: hidden;
}

.dist-fill {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-strong));
  border-radius: 999px;
  transition: width var(--transition);
}

.dist-pct {
  width: 3rem;
  text-align: right;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  flex: 0 0 auto;
}

@media (max-width: 480px) {
  .cards { grid-template-columns: repeat(2, 1fr); }
  .panel { padding: 1.25rem; }
  .dist-label { width: 5rem; font-size: 0.82rem; }
  .card-value { font-size: 1.25rem; }
}

@media (prefers-reduced-motion: reduce) {
  .hand-emoji.thinking { animation: none; }
  .round { animation: none; }
  .move-btn,
  .bar-seg,
  .dist-fill { transition: none; }
}