.arcade-page { max-width: 1040px; }
.arcade-heading { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin: 8px 0 32px; }
.arcade-heading h1 { margin: 0 0 10px; font-family: "Research Display", "Songti SC", serif; font-size: clamp(2.5rem, 5vw, 4.4rem); font-weight: 500; letter-spacing: -.025em; line-height: 1.1; }
.arcade-heading p { color: var(--muted); margin: 0; }
.arcade-heading > a { flex-shrink: 0; padding: 10px 0; text-underline-offset: .3em; }
.arcade-index { margin-bottom: 28px; }
.arcade-index a[aria-current="true"] { background: var(--accent); color: var(--button-ink); border-color: var(--accent); }
.arcade-game { scroll-margin-top: 130px; }
.arcade-game[hidden], .arcade-page [hidden] { display: none !important; }
.arcade-game-heading { display: flex; justify-content: space-between; gap: 24px; align-items: end; margin: 0 0 16px; }
.arcade-game-heading h2 { flex-shrink: 0; margin: 0; font-family: "Research Display", "Songti SC", serif; font-weight: 500; font-size: clamp(1.9rem, 3vw, 2.6rem); line-height: 1.2; }
.arcade-game-heading p { max-width: 45ch; margin: 0; line-height: 1.5; color: var(--muted); }
.arcade-game-heading .arcade-principle { margin-top: 10px; font-size: .88rem; }
.arcade-settings { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin: 0 0 12px; }
.arcade-settings label { font-size: .9rem; }
.arcade-settings select { min-height: 44px; max-width: 100%; padding: 8px 30px 8px 12px; font: inherit; font-size: 1rem; background: var(--panel); color: var(--ink); border: 1px solid var(--line); border-radius: 8px; }
.arcade-settings select:disabled { opacity: .7; cursor: default; }
.arcade-settings output { margin-inline-start: auto; font-size: .8rem; color: var(--muted); font-variant-numeric: tabular-nums; }
.arcade-condition { min-height: 1.5em; margin: 0 0 12px; font-size: .88rem; line-height: 1.5; color: var(--ink); }
.arcade-record { text-align: center; margin: 10px 0 0; color: var(--muted); font-size: .8rem; }
.arcade-hud { display: flex; flex-wrap: wrap; gap: 10px 28px; margin: 0 0 10px; min-height: 24px; font-variant-numeric: tabular-nums; font-size: .88rem; color: var(--ink); }
.arcade-hud span { white-space: nowrap; }
.arcade-hud b { font-size: 1.1em; font-weight: 650; }
.arcade-stage { position: relative; max-width: 800px; margin: 0 auto; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; isolation: isolate; }
.arcade-stage canvas { display: block; width: 100%; height: auto; aspect-ratio: 4 / 3; touch-action: none; cursor: crosshair; outline-offset: -4px; }
.arcade-cover { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; padding: 20px; background: color-mix(in srgb, var(--panel) 75%, transparent); pointer-events: none; }
.arcade-cover > div { text-align: center; max-width: 460px; width: 100%; }
.arcade-cover h3 { font-family: "Research Display", "Songti SC", serif; font-size: clamp(1.8rem, 4vw, 3rem); font-weight: 500; margin: 0 0 8px; line-height: 1.2; text-wrap: balance; }
.arcade-cover p { margin: 0 0 20px; line-height: 1.5; }
.arcade-cover button { pointer-events: auto; }
.arcade-page button { min-height: 44px; border: 1px solid var(--line); background: var(--panel); color: var(--ink); padding: 10px 18px; border-radius: 8px; font: inherit; line-height: 1.25; cursor: pointer; transition: background-color 120ms ease-out, border-color 120ms ease-out; }
.arcade-page button:hover { border-color: var(--accent); background: var(--field); }
.arcade-page button:disabled { cursor: default; opacity: .55; }
.arcade-page [data-play], .arcade-page [data-toggle] { background: var(--accent); border-color: var(--accent); color: var(--button-ink); }
.arcade-page :focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.arcade-page input { accent-color: var(--accent); }
.arcade-page ::selection { color: var(--button-ink); background: var(--accent); }
.arcade-actions { display: flex; align-items: center; justify-content: center; gap: 10px; flex-wrap: wrap; margin: 16px 0 0; }
.arcade-actions label { display: inline-flex; align-items: center; gap: 6px; min-height: 44px; padding: 6px; font-size: .9rem; cursor: pointer; }
.arcade-steer { display: flex; justify-content: center; gap: 10px; margin-top: 10px; }
.arcade-steer:empty { display: none; }
.arcade-steer button { display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-width: 110px; user-select: none; touch-action: none; }
.arcade-steer svg { width: 19px; height: 19px; stroke: currentColor; stroke-width: 2; fill: none; }
.arcade-steer button.is-held { background: var(--field); border-color: var(--accent); }
.arcade-help { text-align: center; color: var(--muted); font-size: .88rem; line-height: 1.6; margin: 14px auto 0; max-width: 70ch; }
.arcade-status { min-height: 1.6em; margin: 14px auto 0; text-align: center; line-height: 1.6; max-width: 65ch; color: var(--ink); }
.arcade-about { border-top: 1px solid var(--line); padding-top: 20px; margin-top: 28px; }
.arcade-about summary { cursor: pointer; color: var(--muted); min-height: 44px; }
.arcade-about p { max-width: 70ch; line-height: 1.8; }
.arcade-footer { margin-top: 40px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: .85rem; line-height: 1.7; }
.arcade-upgrades { position: absolute; inset: 0; background: var(--panel); padding: clamp(14px, 3vw, 30px); display: flex; flex-direction: column; justify-content: center; }
.arcade-upgrades h3 { font-family: "Research Display", "Songti SC", serif; font-size: clamp(1.3rem, 3vw, 2rem); margin: 0 0 8px; font-weight: 500; }
.arcade-upgrades > p { margin: 0 0 20px; color: var(--muted); font-size: .9rem; }
.arcade-upgrades [data-upgrade-list] { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.arcade-upgrades button { display: flex; flex-direction: column; align-items: start; text-align: left; gap: 8px; padding: 18px; }
.arcade-upgrades svg { width: 38px; height: 38px; fill: none; stroke: var(--accent); stroke-width: 2; }
.arcade-upgrades button small { line-height: 1.5; font-size: .8rem; color: var(--muted); }
.arcade-feedback { position: absolute; top: 24px; left: 0; right: 0; text-align: center; pointer-events: none; font-size: 1.1rem; color: var(--ink); }
@media (max-width: 650px) {
  .arcade-heading { align-items: start; margin-bottom: 22px; gap: 12px; }
  .arcade-heading > a { font-size: .83rem; padding-top: 6px; }
  .arcade-heading p { font-size: .9rem; line-height: 1.6; }
  .arcade-index { margin-bottom: 24px; }
  .arcade-game-heading { display: block; }
  .arcade-game-heading p { margin-top: 10px; font-size: .92rem; }
  .arcade-hud { gap: 6px 16px; font-size: .78rem; }
  .arcade-actions { gap: 8px; }
  .arcade-actions button { padding: 9px 13px; font-size: .9rem; }
  .arcade-upgrades { padding: 14px; }
  .arcade-upgrades > p { margin-bottom: 12px; font-size: .8rem; }
  .arcade-upgrades [data-upgrade-list] { gap: 6px; }
  .arcade-upgrades button { padding: 10px 7px; gap: 5px; font-size: .82rem; }
  .arcade-upgrades button small { font-size: .7rem; }
  .arcade-upgrades svg { width: 26px; height: 26px; }
  .arcade-cover { padding: 14px; }
  .arcade-cover p { font-size: .85rem; margin-bottom: 12px; }
  .arcade-feedback { top: 12px; font-size: .85rem; }
}
@media (max-width: 360px) {
  .arcade-upgrades { overflow-y: auto; }
  .arcade-upgrades [data-upgrade-list] { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .arcade-upgrades button { min-width: 0; padding: 9px 6px; }
  .arcade-upgrades button strong { font-size: .78rem; }
  .arcade-upgrades button small { line-height: 1.4; overflow-wrap: anywhere; }
}
@media (prefers-reduced-motion: reduce) { .arcade-page button { transition: none; } }
html[data-motion="off"] .arcade-page button { transition: none; }
@media print { .arcade-stage, .arcade-actions, .arcade-steer { display: none; } }
.arcade-build { max-width: 800px; margin: 10px auto 0; color: var(--muted); font-size: .85rem; line-height: 1.6; }
.arcade-upgrades { overflow-y: auto; scrollbar-color: var(--line) var(--panel); }
.arcade-upgrades [data-reroll] { align-self: start; margin-top: 14px; flex-shrink: 0; }
.arcade-result { width: min(560px, calc(100vw - 28px)); max-height: calc(100dvh - 48px); padding: 0; color: var(--ink); background: var(--panel); border: 1px solid var(--line); border-radius: 12px; box-shadow: 0 18px 60px rgb(0 0 0 / .22); scrollbar-color: var(--line) var(--panel); }
.arcade-result::backdrop { background: rgb(0 0 0 / .6); }
.arcade-result-inner { padding: clamp(20px, 4vw, 36px); }
.arcade-result h3 { margin: 0 0 14px; font-family: "Research Display", "Songti SC", serif; font-size: clamp(1.8rem, 4vw, 2.7rem); font-weight: 500; line-height: 1.3; }
.arcade-result h3:focus { outline: none; }
.arcade-result p { margin: 0 0 18px; color: var(--muted); font-size: 1rem; line-height: 1.6; }
.arcade-result dl { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 12px 20px; margin: 24px 0; font-variant-numeric: tabular-nums; }
.arcade-result dt, .arcade-result dd { margin: 0; padding-bottom: 10px; border-bottom: 1px solid var(--line); }
.arcade-result dd { font-weight: 650; text-align: end; }
.arcade-result-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.arcade-result [data-result-close] { width: 100%; color: var(--button-ink); background: var(--accent); border-color: var(--accent); }
@media (max-width: 650px) {
  .arcade-settings { gap: 8px 10px; }
  .arcade-settings select { flex-grow: 1; }
  .arcade-settings output { width: 100%; margin: 0; }
  .arcade-game[data-phase="upgrade"] .arcade-stage, .arcade-game[data-phase="reward"] .arcade-stage { min-height: 340px; }
  .arcade-upgrades { justify-content: start; padding-top: 20px; }
  .arcade-upgrades button { min-height: 120px; }
  .arcade-upgrades [data-reroll] { min-height: 44px; }
  .arcade-result-actions button { flex: 1; min-width: 0; font-size: 1rem; }
  .arcade-build { font-size: .85rem; }
}
@media print { .arcade-result { display: none; } }
@media (max-width: 650px) {
  .arcade-settings { display: grid; grid-template-columns: minmax(50px, max-content) minmax(0, 1fr); }
  .arcade-settings label { max-width: 100px; line-height: 1.4; }
  .arcade-settings output { grid-column: 1 / -1; }
  .arcade-result-actions { flex-direction: column; }
  .arcade-result-actions button { width: 100%; flex: initial; }
}