.game-hero { border-bottom: 1px solid var(--line); background: var(--paper); }
.game-heading { padding-block: clamp(3.5rem, 8vw, 7rem) clamp(2.8rem, 6vw, 5rem); }
.back-link { display: inline-block; margin-bottom: clamp(2rem, 5vw, 4rem); color: var(--muted); font-size: 0.82rem; font-weight: 800; text-decoration: none; }
.back-link:hover { color: var(--red); }
.game-hero h1 { max-width: 13ch; margin: 0; font-size: clamp(3.4rem, 9vw, 8rem); font-weight: 950; line-height: 0.84; letter-spacing: -0.08em; }
.game-hero p { max-width: 48rem; margin: 1.7rem 0 0; color: var(--muted); font-size: clamp(1.05rem, 2.1vw, 1.35rem); font-weight: 520; letter-spacing: -0.02em; }
.game-content { padding-block: clamp(1.5rem, 4vw, 3rem) clamp(4.5rem, 9vw, 8rem); }

.game-frame { overflow: hidden; border: 1px solid rgba(255,255,255,0.15); border-radius: var(--radius); background: #0b0b0b; box-shadow: var(--shadow); }
.game-frame:fullscreen { width: 100vw; height: 100vh; border: 0; border-radius: 0; background: #0b0b0b; padding: max(0.55rem, env(safe-area-inset-top)) max(0.55rem, env(safe-area-inset-right)) max(0.55rem, env(safe-area-inset-bottom)) max(0.55rem, env(safe-area-inset-left)); }
.game-frame:fullscreen .game-root { min-height: calc(100vh - 5rem); }
.game-toolbar { display: flex; min-height: 3.9rem; align-items: center; justify-content: space-between; gap: 1rem; border-bottom: 1px solid rgba(255,255,255,0.13); background: #131313; color: var(--white); padding: 0.6rem 0.75rem; }
.toolbar-score { display: flex; align-items: baseline; gap: 0.55rem; white-space: nowrap; }
.toolbar-score span { color: rgba(255,255,255,0.55); font-size: 0.66rem; font-weight: 800; text-transform: uppercase; letter-spacing: 0.08em; }
.toolbar-score strong { font-size: 1.05rem; font-variant-numeric: tabular-nums; }
.toolbar-buttons { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 0.35rem; }
.toolbar-button { display: inline-flex; width: 2.35rem; height: 2.35rem; flex: 0 0 2.35rem; align-items: center; justify-content: center; border: 1px solid rgba(255,255,255,0.16); border-radius: 999px; background: transparent; color: rgba(255,255,255,0.85); padding: 0; cursor: pointer; }
.toolbar-button:hover { border-color: rgba(255,255,255,0.42); color: var(--white); }
.toolbar-button:focus-visible { outline: 2px solid var(--yellow); outline-offset: 2px; }
.toolbar-button[aria-pressed="true"] { border-color: var(--yellow); color: var(--yellow); }
.toolbar-icon { width: 1.1rem; height: 1.1rem; overflow: visible; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.toolbar-icon-alternate { display: none; }
.toolbar-button[data-state="resume"] .toolbar-icon-default,
.toolbar-button[data-state="unmuted"] .toolbar-icon-default { display: none; }
.toolbar-button[data-state="resume"] .toolbar-icon-alternate,
.toolbar-button[data-state="unmuted"] .toolbar-icon-alternate { display: initial; }

.game-root { position: relative; min-height: 430px; padding: clamp(0.55rem, 1.5vw, 0.9rem); }
.game-loading { display: flex; min-height: 390px; align-items: center; justify-content: center; gap: 0.7rem; color: rgba(255,255,255,0.62); font-size: 0.72rem; font-weight: 760; text-transform: uppercase; letter-spacing: 0.08em; }
.game-loading span { width: 1rem; height: 1rem; border: 2px solid rgba(255,255,255,0.22); border-top-color: var(--red); border-radius: 50%; animation: pg-spin 700ms linear infinite; }
@keyframes pg-spin { to { transform: rotate(360deg); } }
.game-error { display: grid; min-height: 340px; place-content: center; gap: 0.4rem; margin: 0; padding: 2rem; color: #ffd4d5; text-align: center; }
.game-error strong { font-size: 1.25rem; }
.game-error span { color: rgba(255,255,255,0.6); }

.controls-panel { display: flex; align-items: baseline; gap: clamp(1.2rem, 4vw, 3rem); margin-top: 1rem; border: 1px solid var(--line); border-radius: 0.9rem; background: var(--paper); padding: 1rem 1.15rem; }
.controls-panel h2 { margin: 0; font-size: 0.72rem; font-weight: 850; text-transform: uppercase; letter-spacing: 0.08em; }
.controls-panel ul { display: flex; flex-wrap: wrap; gap: 0.35rem 1.4rem; margin: 0; padding: 0; color: var(--muted); list-style: none; font-size: 0.82rem; }
.controls-panel li { position: relative; }
.controls-panel li + li::before { position: absolute; left: -0.8rem; content: "·"; }
.game-note { margin: 1rem 0 0; color: var(--muted); font-size: 0.73rem; }
.game-note a { font-weight: 700; }

.concept-panel { overflow: hidden; border-radius: var(--radius); background: var(--black); box-shadow: var(--shadow); }
.concept-panel img { width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; }
.concept-panel p { margin: 0; border-top: 1px solid rgba(255,255,255,0.13); background: var(--black); color: var(--white); padding: 1rem 1.2rem; font-size: 0.78rem; font-weight: 820; text-transform: uppercase; letter-spacing: 0.08em; }

@media (max-width: 760px) {
  .game-root { min-height: 350px; padding: 0.45rem; }
  .controls-panel { align-items: flex-start; flex-direction: column; gap: 0.6rem; }
  .controls-panel ul { display: grid; gap: 0.3rem; }
  .controls-panel li + li::before { display: none; }
}

@media (max-width: 510px) {
  .game-toolbar { gap: 0.45rem; padding-inline: 0.55rem; }
  .toolbar-score span { display: none; }
  .toolbar-buttons { flex-wrap: nowrap; gap: 0.25rem; }
  .toolbar-button { width: 2.15rem; height: 2.15rem; flex-basis: 2.15rem; }
  .game-hero h1 { font-size: clamp(3.1rem, 18vw, 5.5rem); }
}

@media (prefers-reduced-motion: reduce) {
  .game-loading span { animation: none; }
}