/* ナビゲーション・フッター */

.nav-arrow {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  z-index: 40;
  width: clamp(36px, 3.6vw, 60px);
  height: clamp(36px, 3.6vw, 60px);
  background: transparent;
  border: 0;
  padding: 0;
  cursor: pointer;
  color: var(--sumi);
  opacity: 0.18;
  transition: opacity 180ms ease;
  appearance: none;
  -webkit-tap-highlight-color: transparent;
}
.nav-arrow svg { width: 100%; height: 100%; display: block; }
.nav-arrow:hover { opacity: 0.8; }
.nav-arrow:focus { outline: none; }
.nav-arrow:focus-visible { outline: 2px solid var(--miso); border-radius: 4px; }
#nav-prev { left: 6px; }
#nav-next { right: 6px; }

body[data-nav-at-start="true"] #nav-prev,
body[data-nav-at-end="true"] #nav-next { display: none; }
body[data-active-layout="cover"] .nav-arrow,
body[data-active-layout="chapter"] .nav-arrow,
body[data-active-layout="end"] .nav-arrow { color: var(--shiro); }

/* ---- フッターの長屋 ---- */
.deck-footer {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: var(--footer-h);
  z-index: 30;
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 0 24px;
  background: var(--shiro-2);
  border-top: 3px solid var(--kani);
  font-family: var(--font-dot);
  color: var(--sumi-2);
  pointer-events: none;
}
.deck-footer[hidden] { display: none; }
/* 軒の板目（kani.show の暖簾の下の縞） */
.deck-footer::before {
  content: "";
  position: absolute;
  left: 0; right: 0; top: -9px;
  height: 6px;
  background: repeating-linear-gradient(90deg, var(--kani-deep) 0 2px, transparent 2px 24px);
  opacity: 0.0;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  white-space: nowrap;
  flex-shrink: 0;
}
.footer-brand svg { width: 26px; height: auto; }

.footer-rooms {
  list-style: none;
  margin: 0 0 0 auto;
  padding: 0;
  display: flex;
  align-items: flex-end;
  gap: 4px;
  height: 100%;
}
.footer-room {
  position: relative;
  display: flex;
  align-items: center;
  gap: 6px;
  height: 100%;
  padding: 0 12px;
  font-size: 15px;
  color: var(--sumi-2);
  opacity: 0.55;
  transition: opacity 200ms ease, color 200ms ease;
}
.footer-room.visited { opacity: 0.8; }
.footer-room.active { opacity: 1; color: var(--kani-deep); }
.footer-room.active::after {
  content: "";
  position: absolute;
  left: 8px; right: 8px; bottom: 0;
  height: 4px;
  background: var(--kani);
}
/* 小さな暖簾（3枚） */
.noren {
  display: inline-flex;
  gap: 2px;
  height: 14px;
}
.noren i {
  width: 5px;
  background: var(--c-wall);
}
.footer-room.visited .noren i { background: var(--kani-hot); }
.footer-room.active .noren { display: none; }
.footer-room .room-crab {
  display: none;
  width: 30px;
  animation: crab-walk 0.9s steps(2) infinite;
}
.footer-room .room-crab svg { width: 100%; height: auto; display: block; }
.footer-room.active .room-crab { display: block; }

.footer-page {
  font-size: 14px;
  min-width: 64px;
  text-align: right;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.06em;
}

@keyframes crab-walk {
  0% { transform: translateX(-2px); }
  100% { transform: translateX(2px); }
}

@media (orientation: portrait) and (max-width: 700px) {
  #stage::before {
    content: "横向きで見ると綺麗だぜ ↻";
    position: absolute;
    bottom: 12px;
    left: 0;
    right: 0;
    z-index: 60;
    text-align: center;
    font-family: var(--font-dot);
    font-size: 12px;
    color: var(--sumi-2);
    pointer-events: none;
  }
}

/* 発表用カウントダウン（t で開始/停止、r で戻す） */
.deck-timer {
  position: absolute;
  top: 10px;
  right: 12px;
  z-index: 60;
  padding: 3px 9px 4px;
  font-family: var(--font-dot);
  font-size: 15px;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
  color: var(--shiro);
  background: rgba(36, 32, 28, 0.55);
  border-radius: 2px;
  pointer-events: none;
}
.deck-timer[hidden] { display: none; }
.deck-timer[data-state="paused"] { opacity: 0.55; }
.deck-timer[data-state="paused"]::before { content: "⏸ "; }
.deck-timer[data-state="warn"] { background: rgba(201, 138, 58, 0.9); }
.deck-timer[data-state="red"],
.deck-timer[data-state="over"] { background: var(--kani); }
.deck-timer[data-state="over"] { animation: timer-blink 1s steps(2) infinite; }
@keyframes timer-blink { 50% { opacity: 0.45; } }

/* 本番では軽く流していいスライドの札（<!-- skip -->）。右上、タイマーの下に出る */
.slide.skip::after {
  content: "skip";
  position: absolute;
  right: 12px;
  top: 38px;
  z-index: 70;
  padding: 2px 7px 3px;
  font-family: var(--font-dot);
  font-size: 13px;
  line-height: 1;
  letter-spacing: 0.08em;
  color: var(--sumi-2);
  border: 1px dashed var(--sumi-2);
  border-radius: 2px;
  background: var(--shiro-2);
  opacity: 0.8;
  pointer-events: none;
}