/* AI-Bird — arcade page */

.aibird-body {
  overflow-x: hidden;
  touch-action: manipulation;
  user-select: none;
  -webkit-user-select: none;
}

.aibird-app {
  min-height: 100dvh;
}

.header--aibird {
  grid-template-columns: minmax(0, 1fr) auto;
}

.header--aibird .header__nav {
  grid-column: 2;
}

.aibird-main {
  flex: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 220px;
  gap: 1rem;
  padding: 1rem 1.5rem 0.5rem;
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
  box-sizing: border-box;
  align-items: stretch;
}

.aibird-stage {
  position: relative;
  width: 100%;
  min-height: 520px;
  height: calc(100dvh - var(--header-h) - 7rem);
  max-height: 820px;
  background: #060a12;
  border: 2px solid rgba(56, 189, 248, 0.35);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.04),
    0 8px 32px rgba(0, 0, 0, 0.35);
}

#aibird-canvas {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  max-width: none;
  cursor: pointer;
  touch-action: none;
}

.aibird-hud {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  max-width: none;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  padding: 0.65rem 0.85rem;
  pointer-events: none;
  box-sizing: border-box;
  z-index: 5;
}

.aibird-hud__label {
  display: block;
  font-size: 0.58rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.55);
}

.aibird-hud__value {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 700;
  color: #fff;
  text-shadow: 0 0 12px rgba(56, 189, 248, 0.6);
}

.aibird-hud__center {
  text-align: center;
}

.aibird-hud__level {
  font-size: 0.62rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.85);
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.5);
}

.aibird-hud__right {
  text-align: right;
}

.aibird-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(10, 14, 23, 0.72);
  backdrop-filter: blur(4px);
  z-index: 10;
}

.aibird-overlay--hidden {
  display: none;
}

.aibird-overlay__panel {
  text-align: center;
  padding: 1.5rem 1.25rem;
  max-width: 320px;
}

.aibird-overlay__eyebrow {
  margin: 0 0 0.25rem;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent-bright);
}

.aibird-overlay__title {
  margin: 0 0 0.75rem;
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: #fff;
}

.aibird-overlay__text {
  margin: 0 0 1rem;
  font-size: 0.82rem;
  line-height: 1.55;
  color: var(--text-secondary);
}

.aibird-overlay__text kbd {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.1rem 0.35rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg-surface);
}

.aibird-overlay__hint {
  margin: 0.85rem 0 0;
  font-size: 0.72rem;
  color: var(--text-secondary);
}

.aibird-level-select {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  justify-content: center;
  margin-bottom: 1rem;
}

.aibird-level-btn {
  font-family: var(--font-sans);
  font-size: 0.68rem;
  font-weight: 600;
  padding: 0.35rem 0.6rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(59, 130, 246, 0.35);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s;
}

.aibird-level-btn:hover:not(:disabled) {
  border-color: var(--accent);
  color: var(--accent-bright);
}

.aibird-level-btn--active {
  border-color: var(--accent);
  color: var(--accent-bright);
  background: rgba(59, 130, 246, 0.12);
}

.aibird-level-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.aibird-btn {
  min-width: 140px;
  font-size: 0.9rem;
  font-weight: 700;
  padding: 0.55rem 1.25rem;
  border: none;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, #2563eb, #38bdf8);
  color: #fff;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(56, 189, 248, 0.35);
  transition: transform 0.12s, box-shadow 0.12s;
}

.aibird-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(56, 189, 248, 0.45);
}

.aibird-btn:active {
  transform: translateY(0);
}

.aibird-sidebar__title--spaced {
  margin-top: 1.25rem;
}

.aibird-leaderboard {
  margin-bottom: 0.5rem;
}

.aibird-leaderboard__level-label {
  margin: -0.35rem 0 0.5rem;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-bright);
}

.aibird-leaderboard__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  overflow: hidden;
}

.aibird-leaderboard__item {
  display: grid;
  grid-template-columns: 1.35rem 1fr auto;
  align-items: center;
  gap: 0.3rem;
  padding: 0.22rem 0.4rem;
  min-height: 1.55rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  font-size: 0.7rem;
  background: var(--bg-panel);
}

.aibird-leaderboard__item--gold {
  border-color: rgba(251, 191, 36, 0.55);
  background: rgba(251, 191, 36, 0.08);
}

.aibird-leaderboard__item--silver {
  border-color: rgba(203, 213, 225, 0.45);
  background: rgba(203, 213, 225, 0.06);
}

.aibird-leaderboard__item--bronze {
  border-color: rgba(180, 83, 9, 0.45);
  background: rgba(180, 83, 9, 0.08);
}

.aibird-leaderboard__rank {
  text-align: center;
  font-size: 0.82rem;
  line-height: 1;
}

.aibird-leaderboard__rank-num {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--text-secondary);
}

.aibird-leaderboard__name {
  font-weight: 600;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  line-height: 1.2;
}

.aibird-leaderboard__score {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.72rem;
  color: var(--accent-bright);
}

.aibird-leaderboard__empty {
  font-size: 0.72rem;
  color: var(--text-secondary);
  padding: 0.35rem 0;
}

.aibird-lb-modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(10, 14, 23, 0.82);
  backdrop-filter: blur(4px);
  padding: 1rem;
}

.aibird-lb-modal--hidden {
  display: none;
}

.aibird-lb-modal__panel {
  width: 100%;
  max-width: 320px;
  padding: 1.25rem;
  background: var(--bg-surface);
  border: 1px solid rgba(56, 189, 248, 0.35);
  border-radius: var(--radius-md);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
}

.aibird-lb-modal__title {
  margin: 0 0 0.35rem;
  font-size: 1.15rem;
  color: var(--accent-bright);
}

.aibird-lb-modal__text {
  margin: 0 0 0.85rem;
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.aibird-lb-modal__label {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.aibird-lb-modal__input {
  width: 100%;
  box-sizing: border-box;
  padding: 0.5rem 0.65rem;
  margin-bottom: 0.85rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--text-primary);
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.aibird-lb-modal__input:focus {
  outline: none;
  border-color: var(--accent);
}

.aibird-lb-modal__actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.aibird-lb-modal__skip {
  flex: 1;
  min-width: 100px;
  padding: 0.5rem 0.75rem;
  font-size: 0.78rem;
  font-weight: 600;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
}

.aibird-lb-modal__skip:hover {
  border-color: var(--accent);
  color: var(--accent-bright);
}

.aibird-lb-modal__error {
  margin: 0.65rem 0 0;
  font-size: 0.72rem;
  color: #f87171;
}

.aibird-lb-modal__error--hidden {
  display: none;
}

.aibird-sidebar {
  padding: 1rem;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  align-self: start;
}

.aibird-sidebar__title {
  margin: 0 0 0.75rem;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
}

.aibird-level-picker {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  margin-bottom: 0.75rem;
}

.aibird-level-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.35rem;
  width: 100%;
  padding: 0.38rem 0.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-panel);
  color: var(--text-primary);
  font-family: var(--font-sans);
  text-align: left;
  cursor: pointer;
  white-space: nowrap;
  transition: border-color 0.15s, background 0.15s;
}

.aibird-level-card:hover:not(:disabled) {
  border-color: var(--accent);
  background: rgba(59, 130, 246, 0.06);
}

.aibird-level-card--active {
  border-color: var(--accent);
  background: rgba(59, 130, 246, 0.12);
  box-shadow: inset 0 0 0 1px rgba(56, 189, 248, 0.15);
}

.aibird-level-card--locked {
  opacity: 0.45;
  cursor: not-allowed;
}

.aibird-level-card__main {
  display: flex;
  align-items: baseline;
  gap: 0.35rem;
  min-width: 0;
  overflow: hidden;
}

.aibird-level-card__num {
  flex-shrink: 0;
  font-size: 0.62rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--accent-bright);
}

.aibird-level-card__name {
  font-size: 0.68rem;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
}

.aibird-level-card__best {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--text-secondary);
}

.aibird-sidebar__tip {
  margin: 0;
  font-size: 0.72rem;
  line-height: 1.5;
  color: var(--text-secondary);
}

.aibird-sidebar__guide-link {
  display: inline-block;
  margin-top: 0.35rem;
  color: var(--accent-bright);
  text-decoration: none;
  font-weight: 600;
}

.aibird-sidebar__guide-link:hover {
  text-decoration: underline;
}

.header--aibird .header__nav {
  grid-column: 2;
}

.aibird-footer {
  text-align: center;
  padding: 0.75rem 1rem 1.25rem;
  font-size: 0.72rem;
  color: var(--text-secondary);
}

.aibird-footer a {
  color: var(--accent-bright);
  text-decoration: none;
}

.aibird-footer a:hover {
  text-decoration: underline;
}

@media (max-width: 720px) {
  .aibird-main {
    grid-template-columns: 1fr;
    padding: 0.75rem 1rem 0.5rem;
  }

  .aibird-stage {
    height: min(calc(100dvh - var(--header-h) - 10rem), 78dvh);
    min-height: 420px;
    max-height: none;
  }

  .aibird-sidebar {
    order: 2;
  }

  .header--aibird {
    grid-template-columns: 1fr auto;
  }

  .header--aibird .header__nav {
    grid-column: 2;
    grid-row: 1;
  }
}

@media (max-width: 480px) {
  .header__nav {
    gap: 0.25rem;
  }

  .header__game-link,
  .header__guide-link {
    font-size: 0.62rem;
    padding: 0.24rem 0.44rem;
  }
}