/* Sky Hopper theme tokens — both light and dark palettes */
:root {
  color-scheme: light;
  --canvas: #eaf8ff;
  --surface: #ffffff;
  --surface-2: #dff3ff;
  --ink: #15334a;
  --muted: #526c7e;
  --border: #c8e4f0;
  --border-strong: #8dbdd2;
  --accent: #27a7e8;
  --accent-ink: #062a43;
  --accent-text: #1476aa;
  --accent-soft: #d7f2ff;
  --accent-strong: #0c5d87;
  --accent-hover: #168bc8;
  --accent-border: #79c9ec;
  --success: #2fa66c;
  --success-ink: #ffffff;
  --success-soft: #dcf7e8;
  --success-strong: #12683e;
  --warning: #dc9833;
  --warning-ink: #2f210b;
  --warning-soft: #fff1d0;
  --warning-strong: #83500d;
  --danger: #e05e68;
  --danger-ink: #ffffff;
  --danger-soft: #ffe4e6;
  --danger-strong: #a52b37;
  --chart-1: #27a7e8;
  --chart-2: #35b978;
  --chart-3: #f2b544;
  --chart-4: #ed7a75;
  --chart-5: #8a7de0;
  --chart-6: #4dbfc0;
  --x-sky-top: #72cfff;
  --x-sky-bottom: #e1f8ff;
  --x-cloud: #ffffff;
  --x-cloud-shade: #b8e9f9;
  --x-hill-back: #91ddb4;
  --x-hill-front: #56c786;
  --x-ground-edge: #247d58;
  --x-pipe-top: #4bd28a;
  --x-pipe-dark: #1f9967;
  --x-pipe-light: #a5f6bc;
  --x-pipe-edge: #137a53;
  --x-bird-body: #ffdf65;
  --x-bird-wing: #f8b84b;
  --x-bird-beak: #ef8b45;
  --x-bird-cheek: #ff9eac;
  --x-sun: #fff4ab;
  --font-display: "Outfit", "Nunito Sans", sans-serif;
  --font-body: "Nunito Sans", "Outfit", sans-serif;
  --font-mono: "DM Mono", monospace;
  --radius-sm: 0.5rem;
  --radius-md: 0.85rem;
  --radius-lg: 1.25rem;
  --radius-xl: 1.75rem;
  --radius-btn: 999px;
  --shadow-sm: 0 4px 12px rgba(21, 77, 112, 0.08);
  --shadow-md: 0 12px 32px rgba(21, 77, 112, 0.13);
  --shadow-lg: 0 24px 64px rgba(21, 77, 112, 0.18);
}
html[data-theme="dark"] {
  color-scheme: dark;
  --canvas: #0b1a2b;
  --surface: #132940;
  --surface-2: #203e57;
  --ink: #eef8ff;
  --muted: #b0cada;
  --border: #2d5069;
  --border-strong: #47728d;
  --accent: #4ac2f4;
  --accent-ink: #092236;
  --accent-text: #79d4fb;
  --accent-soft: #153c54;
  --accent-strong: #b3eaff;
  --accent-hover: #70d1f8;
  --accent-border: #367b9b;
  --success: #63d69a;
  --success-ink: #08281a;
  --success-soft: #173f30;
  --success-strong: #a2f3c5;
  --warning: #f2c16a;
  --warning-ink: #2d1d06;
  --warning-soft: #49391d;
  --warning-strong: #ffdfa0;
  --danger: #ff8791;
  --danger-ink: #3a1015;
  --danger-soft: #48252c;
  --danger-strong: #ffb7bd;
  --chart-1: #4ac2f4;
  --chart-2: #63d69a;
  --chart-3: #f2c16a;
  --chart-4: #ff8791;
  --chart-5: #aea3ff;
  --chart-6: #70dbd9;
  --x-sky-top: #72cfff;
  --x-sky-bottom: #e1f8ff;
  --x-cloud: #ffffff;
  --x-cloud-shade: #b8e9f9;
  --x-hill-back: #91ddb4;
  --x-hill-front: #56c786;
  --x-ground-edge: #247d58;
  --x-pipe-top: #4bd28a;
  --x-pipe-dark: #1f9967;
  --x-pipe-light: #a5f6bc;
  --x-pipe-edge: #137a53;
  --x-bird-body: #ffdf65;
  --x-bird-wing: #f8b84b;
  --x-bird-beak: #ef8b45;
  --x-bird-cheek: #ff9eac;
  --x-sun: #fff4ab;
  --font-display: "Outfit", "Nunito Sans", sans-serif;
  --font-body: "Nunito Sans", "Outfit", sans-serif;
  --font-mono: "DM Mono", monospace;
  --radius-sm: 0.5rem;
  --radius-md: 0.85rem;
  --radius-lg: 1.25rem;
  --radius-xl: 1.75rem;
  --radius-btn: 999px;
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 12px 32px rgba(0, 0, 0, 0.26);
  --shadow-lg: 0 24px 64px rgba(0, 0, 0, 0.32);
}
body.game-page {
  min-height: 100vh;
  background:
    radial-gradient(ellipse at 15% 0%, var(--accent-soft), transparent 42rem),
    linear-gradient(165deg, var(--canvas), var(--surface) 72%);
  color: var(--ink);
  font-family: var(--font-body);
}

.game-page * {
  box-sizing: border-box;
}

.game-page button,
.game-page a {
  -webkit-tap-highlight-color: transparent;
}

.game-page button {
  font: inherit;
}

.app-frame {
  min-height: 100vh;
  padding: 0 clamp(1rem, 4vw, 3rem);
}

.sitebar {
  width: min(100%, 1180px);
  min-height: 86px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 1px solid color-mix(in srgb, var(--border) 68%, transparent);
}

.brand {
  min-width: 0;
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--ink);
  text-decoration: none;
}

.brand-mark {
  width: 44px;
  height: 44px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: linear-gradient(145deg, var(--surface), var(--accent-soft));
  box-shadow: var(--shadow-sm);
}

.brand-mark svg {
  width: 38px;
  height: 38px;
}

.brand-copy {
  display: grid;
  gap: 0.13rem;
}

.brand-copy strong {
  font-family: var(--font-display);
  font-size: 1.12rem;
  letter-spacing: -0.035em;
  line-height: 1;
}

.brand-copy small {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.55rem;
  letter-spacing: 0.09em;
}

.site-actions {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex: 0 0 auto;
}

.sound-toggle,
.theme-toggle {
  height: 42px;
  min-width: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-btn);
  background: color-mix(in srgb, var(--surface) 90%, transparent);
  color: var(--ink);
  cursor: pointer;
  transition: border-color 150ms ease, background 150ms ease, transform 150ms ease;
}

.sound-toggle {
  padding: 0 0.9rem;
  font-size: 0.78rem;
  font-weight: 800;
}

.sound-symbol {
  color: var(--accent-text);
  font-size: 1.2rem;
  line-height: 1;
}

.theme-toggle {
  width: 42px;
  padding: 0;
}

.theme-toggle .icon {
  width: 19px;
  height: 19px;
}

.sound-toggle:hover,
.theme-toggle:hover {
  border-color: var(--accent-border);
  background: var(--accent-soft);
  transform: translateY(-1px);
}

.main-content {
  width: min(100%, 1120px);
  margin: 0 auto;
  padding: clamp(1.8rem, 4vw, 3rem) 0 1.2rem;
}

.intro-copy {
  text-align: center;
  margin: 0 auto clamp(1.5rem, 3vw, 2.2rem);
  max-width: 710px;
}

.eyebrow {
  margin: 0 0 0.7rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  color: var(--accent-strong);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  font-weight: 500;
  letter-spacing: 0.115em;
}

.live-dot,
.status-dot,
.caption-dot {
  width: 7px;
  height: 7px;
  display: inline-block;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--success) 14%, transparent);
}

.intro-copy h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 800;
  letter-spacing: -0.065em;
  line-height: 0.98;
  text-wrap: balance;
}

.intro-copy h1 span {
  color: var(--accent-text);
}

.intro-description {
  max-width: 490px;
  margin: 0.9rem auto 0;
  color: var(--muted);
  font-size: clamp(0.93rem, 1.4vw, 1.04rem);
  line-height: 1.55;
  text-wrap: pretty;
}

.play-layout {
  display: grid;
  grid-template-columns: minmax(0, 540px) minmax(235px, 292px);
  justify-content: center;
  align-items: start;
  gap: clamp(1.2rem, 3.5vw, 3.2rem);
}

.game-column {
  width: 100%;
  min-width: 0;
}

.stage-meta,
.stage-caption {
  min-height: 34px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.055em;
}

.stage-meta > span:first-child,
.stage-caption > span:first-child {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-width: 0;
}

.status-dot {
  width: 6px;
  height: 6px;
  box-shadow: none;
}

.meta-divider {
  color: var(--border-strong);
}

.best-pill {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.42rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-btn);
  background: var(--surface);
  color: var(--muted);
  font-size: 0.6rem;
}

.best-pill strong {
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 0.82rem;
  letter-spacing: 0;
}

.game-stage {
  position: relative;
  isolation: isolate;
  width: 100%;
  aspect-ratio: 3 / 4;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--accent-border) 70%, var(--border));
  border-radius: 1.45rem;
  background: linear-gradient(165deg, var(--x-sky-top), var(--x-sky-bottom));
  box-shadow: var(--shadow-lg);
  --paint-sky-top: var(--x-sky-top);
  --paint-sky-bottom: var(--x-sky-bottom);
  --paint-cloud: var(--x-cloud);
  --paint-cloud-shade: var(--x-cloud-shade);
  --paint-hill-back: var(--x-hill-back);
  --paint-hill-front: var(--x-hill-front);
  --paint-ground-edge: var(--x-ground-edge);
  --paint-pipe-top: var(--x-pipe-top);
  --paint-pipe-dark: var(--x-pipe-dark);
  --paint-pipe-light: var(--x-pipe-light);
  --paint-pipe-edge: var(--x-pipe-edge);
  --paint-bird-body: var(--x-bird-body);
  --paint-bird-wing: var(--x-bird-wing);
  --paint-bird-beak: var(--x-bird-beak);
  --paint-bird-cheek: var(--x-bird-cheek);
  --paint-sun: var(--x-sun);
}

#game-canvas {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
  user-select: none;
}

.game-hud {
  position: absolute;
  z-index: 2;
  inset: 0 0 auto;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: clamp(0.8rem, 2vw, 1.1rem);
  pointer-events: none;
}

.game-hud[hidden],
.screen-layer[hidden] {
  display: none !important;
}

.hud-score {
  min-width: 83px;
  padding: 0.58rem 0.85rem 0.54rem;
  display: grid;
  justify-items: center;
  gap: 0.04rem;
  border: 1px solid color-mix(in srgb, var(--x-cloud) 72%, transparent);
  border-radius: 1rem;
  background: color-mix(in srgb, var(--x-cloud) 84%, transparent);
  color: var(--ink);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(10px);
}

.hud-score span {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.51rem;
  letter-spacing: 0.075em;
}

.hud-score strong {
  font-family: var(--font-display);
  font-size: 1.85rem;
  font-weight: 800;
  line-height: 1;
}

.pause-button {
  min-height: 40px;
  padding: 0.55rem 0.85rem;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  border: 1px solid color-mix(in srgb, var(--x-cloud) 72%, transparent);
  border-radius: var(--radius-btn);
  background: color-mix(in srgb, var(--x-cloud) 84%, transparent);
  color: var(--ink);
  font-size: 0.72rem !important;
  font-weight: 800 !important;
  box-shadow: var(--shadow-sm);
  pointer-events: auto;
  cursor: pointer;
  backdrop-filter: blur(10px);
}

.pause-glyph {
  font-family: var(--font-mono);
  font-size: 1rem;
}

.screen-layer {
  position: absolute;
  z-index: 3;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0.6rem;
  padding: clamp(0.9rem, 3vw, 1.6rem);
  background: linear-gradient(180deg, color-mix(in srgb, var(--x-sky-bottom) 16%, transparent), color-mix(in srgb, var(--x-sky-bottom) 50%, transparent));
}

.menu-card,
.overlay-card {
  width: min(100%, 340px);
  padding: clamp(1.2rem, 3.2vw, 1.75rem);
  border: 1px solid color-mix(in srgb, var(--x-cloud) 80%, var(--border));
  border-radius: 1.45rem;
  background: color-mix(in srgb, var(--surface) 90%, transparent);
  box-shadow: var(--shadow-lg);
  text-align: center;
  backdrop-filter: blur(18px);
  animation: card-arrive 430ms cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

.bird-badge {
  width: 86px;
  height: 72px;
  margin: 0 auto 0.8rem;
  display: grid;
  place-items: center;
  border: 1px solid color-mix(in srgb, var(--accent-border) 80%, var(--border));
  border-radius: 25px;
  background: linear-gradient(145deg, var(--accent-soft), var(--surface));
  box-shadow: var(--shadow-sm);
  animation: bird-bob 2.5s ease-in-out infinite;
}

.bird-badge svg {
  width: 76px;
  height: 62px;
  overflow: visible;
}

.menu-kicker {
  margin: 0 0 0.35rem;
  color: var(--accent-strong);
  font-family: var(--font-mono);
  font-size: 0.58rem;
  font-weight: 500;
  letter-spacing: 0.12em;
}

.menu-card h2,
.overlay-card h2 {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 2.55rem);
  font-weight: 800;
  letter-spacing: -0.065em;
  line-height: 1;
}

.menu-tagline {
  margin: 0.5rem 0 1.2rem;
  color: var(--muted);
  font-size: 0.86rem;
}

.primary-action {
  width: 100%;
  min-height: 52px;
  padding: 0.8rem 1.15rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  border: 1px solid color-mix(in srgb, var(--accent) 62%, var(--accent-strong));
  border-radius: 0.95rem;
  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
  color: var(--accent-ink);
  font-size: 0.98rem !important;
  font-weight: 900 !important;
  box-shadow: 0 8px 18px color-mix(in srgb, var(--accent) 27%, transparent);
  cursor: pointer;
  transition: transform 150ms ease, box-shadow 150ms ease, filter 150ms ease;
}

.primary-action > span:first-child {
  padding-left: 0.35rem;
}

.action-arrow {
  width: 31px;
  height: 31px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: color-mix(in srgb, var(--accent-ink) 10%, transparent);
  font-size: 1.2rem;
}

.primary-action:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 22px color-mix(in srgb, var(--accent) 30%, transparent);
  filter: saturate(1.08);
}

.primary-action:active {
  transform: translateY(0);
}

.primary-action:focus-visible,
.sound-toggle:focus-visible,
.theme-toggle:focus-visible,
.pause-button:focus-visible,
.text-action:focus-visible {
  outline: 3px solid var(--accent-text);
  outline-offset: 3px;
}

.menu-best {
  min-height: 48px;
  margin-top: 1rem;
  padding: 0.7rem 0.8rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 0.85rem;
  background: color-mix(in srgb, var(--accent-soft) 50%, var(--surface));
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.035em;
}

.trophy-mark {
  color: var(--warning);
  font-size: 1rem;
}

.menu-best strong {
  margin-left: auto;
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 1.05rem;
}

.control-hint {
  margin: 1rem 0 0;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.52rem;
  letter-spacing: 0.095em;
}

.screen-footnote {
  margin: 0;
  color: var(--accent-strong);
  font-size: 0.68rem;
  font-weight: 800;
  text-align: center;
}

.overlay-card {
  max-width: 320px;
}

.overlay-symbol {
  width: 54px;
  height: 54px;
  margin: 0 auto 0.8rem;
  display: grid;
  place-items: center;
  border-radius: 19px;
  font-size: 1.5rem;
  font-weight: 900;
}

.pause-symbol {
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.crash-symbol {
  background: var(--warning-soft);
  color: var(--warning-strong);
}

.overlay-copy {
  margin: 0.55rem 0 1.1rem;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.45;
}

.compact-card .primary-action {
  margin-top: 1.1rem;
}

.text-action {
  width: 100%;
  min-height: 43px;
  margin-top: 0.45rem;
  border: 0;
  border-radius: 0.8rem;
  background: transparent;
  color: var(--muted);
  font-size: 0.78rem !important;
  font-weight: 800 !important;
  cursor: pointer;
}

.text-action:hover {
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.new-record {
  margin: 0.65rem 0 0;
  padding: 0.4rem 0.7rem;
  display: inline-block;
  border: 1px solid color-mix(in srgb, var(--warning) 42%, var(--border));
  border-radius: var(--radius-btn);
  background: var(--warning-soft);
  color: var(--warning-strong);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  animation: record-pop 480ms ease-out both;
}

.result-score {
  margin: 1.1rem 0 0.7rem;
  padding: 0.75rem;
  display: grid;
  gap: 0.1rem;
  border: 1px solid var(--border);
  border-radius: 1rem;
  background: color-mix(in srgb, var(--accent-soft) 55%, var(--surface));
}

.result-score span,
.result-stats span,
.guide-record span {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.54rem;
  letter-spacing: 0.08em;
}

.result-score strong {
  color: var(--accent-strong);
  font-family: var(--font-display);
  font-size: 2.6rem;
  font-weight: 900;
  letter-spacing: -0.05em;
  line-height: 1;
}

.result-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem;
  margin-bottom: 1rem;
}

.result-stats > div {
  padding: 0.65rem 0.45rem;
  display: grid;
  gap: 0.25rem;
  border: 1px solid var(--border);
  border-radius: 0.85rem;
  background: var(--surface);
}

.result-stats strong {
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 1.15rem;
}

.gameover-card .primary-action {
  min-height: 48px;
}

.stage-caption {
  min-height: 37px;
  padding-top: 0.15rem;
  font-size: 0.56rem;
  letter-spacing: 0.035em;
}

.caption-dot {
  width: 6px;
  height: 6px;
  box-shadow: none;
}

.flight-guide {
  margin-top: 34px;
  padding: 1.45rem;
  border: 1px solid var(--border);
  border-radius: 1.4rem;
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  box-shadow: var(--shadow-md);
}

.guide-top {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.guide-icon {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: 1px solid var(--accent-border);
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 1.1rem;
}

.guide-label {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.54rem;
  letter-spacing: 0.08em;
}

.flight-guide h2 {
  margin: 1.1rem 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.055em;
  line-height: 1.04;
}

.guide-description {
  margin: 0;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.6;
}

.guide-divider {
  height: 1px;
  margin: 1.25rem 0;
  background: var(--border);
}

.flight-guide h3 {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-size: 0.96rem;
  font-weight: 800;
}

.control-row {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-top: 0.95rem;
}

.control-key {
  min-width: 58px;
  min-height: 30px;
  padding: 0.42rem 0.35rem;
  display: grid;
  place-items: center;
  border: 1px solid var(--border-strong);
  border-bottom-width: 3px;
  border-radius: 0.55rem;
  background: var(--surface);
  color: var(--accent-strong);
  font-family: var(--font-mono);
  font-size: 0.55rem;
  font-weight: 500;
}

.pause-key {
  min-width: 33px;
  width: 33px;
}

.control-row > div {
  min-width: 0;
  padding-top: 0.05rem;
}

.control-row strong {
  font-size: 0.77rem;
  font-weight: 800;
}

.control-row p {
  margin: 0.18rem 0 0;
  color: var(--muted);
  font-size: 0.72rem;
  line-height: 1.45;
}

.guide-tip {
  margin-top: 1.25rem;
  padding: 0.85rem;
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  border: 1px solid color-mix(in srgb, var(--warning) 30%, var(--border));
  border-radius: 0.9rem;
  background: color-mix(in srgb, var(--warning-soft) 58%, var(--surface));
}

.tip-star {
  color: var(--warning-strong);
  font-size: 1rem;
  line-height: 1.2;
}

.guide-tip p {
  margin: 0;
  color: var(--muted);
  font-size: 0.72rem;
  line-height: 1.5;
}

.guide-tip strong {
  color: var(--ink);
}

.guide-record {
  margin-top: 1.2rem;
  padding-top: 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border-top: 1px solid var(--border);
}

.guide-record > div {
  display: grid;
  gap: 0.15rem;
}

.guide-record strong {
  font-family: var(--font-display);
  font-size: 1.55rem;
  letter-spacing: -0.04em;
}

.record-bird {
  color: var(--accent-text);
  font-size: 1.7rem;
}

.bottom-note {
  margin: 1.1rem auto 0;
  padding-bottom: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.38rem;
  color: var(--muted);
  font-size: 0.69rem;
}

.bottom-note > span[aria-hidden="true"] {
  color: var(--danger);
}

.bottom-note > span:last-child {
  color: var(--accent-strong);
  font-weight: 800;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@keyframes bird-bob {
  0%, 100% { transform: translateY(0) rotate(-2deg); }
  50% { transform: translateY(-5px) rotate(3deg); }
}

@keyframes card-arrive {
  from { transform: translateY(9px) scale(0.985); }
  to { transform: translateY(0) scale(1); }
}

@keyframes record-pop {
  0% { transform: scale(0.88); }
  70% { transform: scale(1.05); }
  100% { transform: scale(1); }
}

@media (min-width: 1500px) {
  .main-content {
    padding-top: 3.2rem;
  }
}

@media (max-width: 850px) {
  .play-layout {
    grid-template-columns: minmax(0, 520px);
    gap: 1.1rem;
  }

  .flight-guide {
    width: min(100%, 520px);
    margin: 0 auto;
    padding: 1.2rem;
  }

  .guide-divider {
    margin: 1rem 0;
  }

  .flight-guide h2 {
    margin-top: 0.8rem;
  }

  .control-row {
    margin-top: 0.75rem;
  }

  .guide-tip {
    margin-top: 1rem;
  }
}

@media (max-width: 520px) {
  .app-frame {
    padding: 0 0.85rem;
  }

  .sitebar {
    min-height: 72px;
  }

  .brand {
    gap: 0.5rem;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
    border-radius: 13px;
  }

  .brand-mark svg {
    width: 33px;
    height: 33px;
  }

  .brand-copy strong {
    font-size: 1rem;
  }

  .brand-copy small {
    font-size: 0.46rem;
    letter-spacing: 0.035em;
  }

  .site-actions {
    gap: 0.4rem;
  }

  .sound-toggle {
    width: 40px;
    padding: 0;
    gap: 0;
  }

  .sound-toggle #sound-label {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
  }

  .theme-toggle {
    width: 40px;
    min-width: 40px;
    height: 40px;
  }

  .main-content {
    padding-top: 1.6rem;
  }

  .intro-copy {
    margin-bottom: 1.1rem;
  }

  .intro-copy h1 {
    font-size: clamp(2.25rem, 10vw, 3rem);
  }

  .intro-description {
    max-width: 340px;
    font-size: 0.88rem;
  }

  .stage-meta {
    min-height: 31px;
    font-size: 0.53rem;
  }

  .game-stage {
    border-radius: 1.15rem;
  }

  .screen-layer {
    padding: 0.55rem;
    gap: 0.35rem;
  }

  .menu-card,
  .overlay-card {
    width: min(100%, 310px);
    padding: clamp(0.9rem, 4vw, 1.3rem);
    border-radius: 1.2rem;
  }

  .bird-badge {
    width: 66px;
    height: 58px;
    margin-bottom: 0.45rem;
    border-radius: 20px;
  }

  .bird-badge svg {
    width: 62px;
    height: 53px;
  }

  .menu-kicker {
    font-size: 0.52rem;
  }

  .menu-card h2,
  .overlay-card h2 {
    font-size: clamp(1.8rem, 7vw, 2.2rem);
  }

  .menu-tagline {
    margin: 0.4rem 0 0.75rem;
    font-size: 0.76rem;
  }

  .primary-action {
    min-height: 46px;
    padding: 0.55rem 0.75rem;
    border-radius: 0.8rem;
  }

  .action-arrow {
    width: 29px;
    height: 29px;
  }

  .menu-best {
    min-height: 39px;
    margin-top: 0.65rem;
    padding: 0.45rem 0.6rem;
    font-size: 0.5rem;
  }

  .menu-best strong {
    font-size: 0.95rem;
  }

  .control-hint {
    margin-top: 0.65rem;
    font-size: 0.46rem;
  }

  .screen-footnote {
    font-size: 0.58rem;
  }

  .overlay-symbol {
    width: 43px;
    height: 43px;
    margin-bottom: 0.5rem;
    border-radius: 15px;
  }

  .overlay-copy {
    margin: 0.45rem 0 0.8rem;
    font-size: 0.75rem;
  }

  .compact-card .primary-action {
    margin-top: 0.8rem;
  }

  .text-action {
    min-height: 36px;
  }

  .result-score {
    margin-top: 0.75rem;
    padding: 0.55rem;
  }

  .result-score strong {
    font-size: 2.1rem;
  }

  .result-stats {
    margin-bottom: 0.7rem;
    gap: 0.4rem;
  }

  .result-stats > div {
    padding: 0.5rem 0.25rem;
  }

  .stage-caption {
    min-height: 31px;
    font-size: 0.48rem;
  }

  .flight-guide {
    padding: 1rem;
  }

  .guide-description {
    font-size: 0.8rem;
  }

  .bottom-note {
    font-size: 0.63rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .game-page *,
  .game-page *::before,
  .game-page *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}