/* styles.css — 768px レスポンシブ対応版 */
@import url('https://fonts.googleapis.com/css2?family=DM+Serif+Display:ital@0;1&family=Noto+Sans+JP:wght@300;400;500;700&family=DM+Mono:wght@400;500&display=swap');

/* ─────────────────────────────────────────
   Design tokens — light theme
───────────────────────────────────────── */
:root {
  color-scheme: light;
  --bg:           #f7f5f2;
  --panel:        #ffffff;
  --panel-soft:   #fafaf8;
  --panel-strong: #f2f0ed;
  --text:         #1a1714;
  --muted:        #7a7570;
  --muted-light:  #9e9990;
  --accent:       #d4523a;
  --accent-dim:   rgba(212,82,58,0.08);
  --accent-glow:  rgba(212,82,58,0.22);
  --border:       #6d6d6d;
  --border-soft:  #ede9e5;
  --danger:       #c0392b;
  --font-serif:   "DM Serif Display", serif;
  --font-body:    "Noto Sans JP", sans-serif;
  --font-mono:    "DM Mono", monospace;
  --radius:       14px;
  --radius-sm:    8px;
  --space-1:      4px;
  --space-2:      8px;
  --space-3:      12px;
  --space-4:      16px;
  --space-5:      20px;
  --space-6:      24px;
  --space-7:      32px;
  --space-8:      40px;
  --space-9:      48px;
  --space-10:     64px;
  --text-xs:      11px;
  --text-sm:      12px;
  --text-md:      14px;
  --text-lg:      16px;
  --text-xl:      18px;
  --space-page-x: 8vw;
  --space-page-x-sm: 5vw;
  --bg-gradient: radial-gradient(1100px circle at 12% 8%, rgba(198, 52, 98, 0.38), transparent 62%),
                 radial-gradient(900px circle at 86% 12%, rgba(124, 48, 170, 0.35), transparent 58%),
                 linear-gradient(180deg, #0b050c 0%, #1b0622 45%, #12070f 100%);
}

/* ─────────────────────────────────────────
   Reset
───────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ─────────────────────────────────────────
   Body & background
───────────────────────────────────────── */
body {
  font-family: var(--font-body);
  font-size: var(--text-md);
  background-color: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-image: var(--bg-gradient);
  background-size: cover;
  background-position: center top;
  background-attachment: fixed;
}

.home-only { display: flex; }
body.not-home .home-only { display: none !important; }

/* ─────────────────────────────────────────
   Site header
───────────────────────────────────────── */
.site-header {
  flex-direction: column;
  padding: var(--space-10) var(--space-page-x) 0;
  gap: 0;
}

.site-header__inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-4);
  width: 100%;
}

.eyebrow {
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-4);
  opacity: 0.75;
}

.site-header h1 {
  font-family: var(--font-body);
  font-size: clamp(44px, 7vw, 80px);
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: -0.01em;
  color: var(--muted-light);
}

.site-header h1 em {
  font-style: italic;
  color: var(--accent);
}

.subhead {
  margin-top: var(--space-4);
  color: var(--muted);
  font-size: var(--text-sm);
  letter-spacing: 0.02em;
}

.site-header__actions {
  padding-top: 4px;
  flex-shrink: 0;
}

/* ─────────────────────────────────────────
   Main
───────────────────────────────────────── */
main {
  flex: 1;
  padding: 0 var(--space-page-x) var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.view { display: none; }
.view.active { display: block; }
.hidden { display: none !important; }

/* ─────────────────────────────────────────
   Home panel
───────────────────────────────────────── */
.home-panel {
  padding: var(--space-9) 0 var(--space-8);
}

.home-panel__actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  align-items: stretch;
  max-width: 280px;
}

.home-panel__actions .ghost {
  text-align: center;
  padding: var(--space-4) var(--space-5);
  font-size: var(--text-md);
}

.home-panel__hint {
  margin-top: var(--space-5);
}

.text-link {
  background: none;
  border: none;
  color: var(--muted);
  font-family: inherit;
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  cursor: pointer;
  padding: 0;
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.15s;
}
.text-link:hover { color: var(--accent); }

/* ─────────────────────────────────────────
   Page nav
───────────────────────────────────────── */
.page-nav {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-6) 0 var(--space-5);
}

.page-nav__title {
  font-family: var(--font-body);
  font-size: clamp(20px, 3vw, 28px);
  font-weight: 400;
  flex: 1;
  text-align: center;
  letter-spacing: 0.01em;
  color: var(--text);
}

/* ─────────────────────────────────────────
   Panel
───────────────────────────────────────── */
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-6);
  box-shadow: 0 4px 24px rgba(0,0,0,0.06), 0 1px 4px rgba(0,0,0,0.04);
}

/* ─────────────────────────────────────────
   Buttons
───────────────────────────────────────── */
button { cursor: pointer; font-family: inherit; }

button.ghost {
  padding: var(--space-3) var(--space-4);
  border-radius: 999px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  font-size: var(--text-sm);
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}
button.ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
}

button.ghost--sm {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
}

/* ─────────────────────────────────────────
   Segmented control
───────────────────────────────────────── */
.segmented {
  display: flex;
  background: var(--panel-strong);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  overflow: hidden;
}

.segmented button {
  flex: 1;
  padding: var(--space-3) var(--space-3);
  border: none;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-family: inherit;
  font-size: var(--text-sm);
  transition: background 0.15s, color 0.15s;
}

.segmented button.active {
  color: #fff;
  background: var(--accent);
  font-weight: 600;
}

/* ─────────────────────────────────────────
   Progress wrap (marathon only)
───────────────────────────────────────── */
.progress-wrap {
  display: none;
  gap: var(--space-2);
  align-items: center;
  color: var(--muted);
  font-size: var(--text-sm);
}

.player-panel.marathon-mode .progress-wrap {
  display: flex;
}

.progress-wrap .label {
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: var(--text-xs);
}

/* ─────────────────────────────────────────
   Setup panel — two-column layout
───────────────────────────────────────── */
.setup-panel {
  padding: 0 !important;
  overflow: hidden;
  position: relative;
  display: flex;
  align-items: stretch;
  min-height: 280px;
}

.setup-left {
  width: 300px;
  flex-shrink: 0;
  padding: var(--space-7) var(--space-6);
  position: relative;
  z-index: 1;
}

.setup-left .controls {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  margin-bottom: 0;
}

.start-btn-full {
  width: 100%;
  text-align: center;
  padding: var(--space-3) var(--space-4);
}

.setup-panel > .ranking-table {
  flex: 1;
  padding: var(--space-6);
  position: relative;
  z-index: 1;
  overflow-x: auto;
}

/* Controls (setup)
───────────────────────────────────────── */
.controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.control label {
  display: block;
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin-bottom: var(--space-2);
}

.control input,
.control select,
.answer-area input,
.answer-area select,
.ranking-controls select {
  width: 100%;
  padding: var(--space-3) var(--space-3);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--panel-strong);
  color: var(--text);
  font-family: inherit;
  font-size: var(--text-sm);
}

/* ─────────────────────────────────────────
   Player panel — two-column layout
───────────────────────────────────────── */
.player-panel { margin-bottom: 8px; }

.play-layout {
  display: flex;
  gap: 28px;
  align-items: stretch;
  min-height: min(68vh, 520px);
}

.play-layout__left {
  flex: 0 0 56%;
  max-width: 56%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0;
}

.play-layout__right {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

@media (max-width: 1080px) {
  .play-layout {
    flex-direction: column;
    gap: var(--space-5);
  }

  .play-layout__left {
    flex: none;
    max-width: 100%;
    width: 100%;
    align-items: center;
  }

  .play-layout__right {
    width: 100%;
  }

  .video-area {
    width: 100%;
    align-items: center;
  }

  .video-wrapper {
    margin-left: auto;
    margin-right: auto;
  }
}

/* quiz / result content switching */
.quiz-content,
.result-content { display: flex; flex-direction: column; gap: var(--space-4); width: 100%; }
.quiz-content.hidden,
.result-content.hidden { display: none; }

.player-panel .timer-area,
.player-panel .answer-area { display: none; }

.player-panel.play-active .timer-area { display: block; }
.player-panel.play-active .answer-area { display: grid; }

.sub-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-4);
  min-height: var(--space-7);
  gap: var(--space-2);
}

.video-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
}

.video-wrapper {
  position: relative;
  width: 640px;
  max-width: 100%;
  height: 360px;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: #111;
}

.video-wrapper iframe { width: 100%; height: 100%; display: block; }

.overlay {
  position: absolute;
  inset: 0;
  z-index: 10;
  pointer-events: none;
  background: #1a1714;
  opacity: 0;
  transition: opacity 0.25s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.overlay::before { content: "🎵"; font-size: 48px; line-height: 1; }
.overlay::after {
  content: "音声のみ / Audio only";
  font-size: 13px;
  letter-spacing: 0.08em;
  color: #9e9990;
}

.video-wrapper.is-obscured .overlay { opacity: 1; pointer-events: auto; }
.video-wrapper.is-obscured iframe { pointer-events: none; }

.video-meta {
  display: flex;
  gap: 8px;
  align-items: center;
  color: var(--muted);
  font-size: 12px;
  flex-wrap: wrap;
}

.video-meta .label {
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 10px;
}

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

.timer-area { margin-top: var(--space-5); text-align: center; }

.timer {
  font-family: var(--font-mono);
  font-size: clamp(48px, 7vw, 80px);
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--text);
  line-height: 1;
}

.status {
  color: var(--muted);
  margin-top: 8px;
  font-size: 13px;
  letter-spacing: 0.04em;
}

.answer-area { margin-top: var(--space-5); }

.search-wrap { position: relative; }

.search-wrap input {
  width: 100%;
  padding: 14px 18px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  font-family: inherit;
  font-size: 16px;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.search-wrap input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.search-list {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  z-index: 100;
  list-style: none;
  padding: 4px 0;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 16px 40px rgba(0,0,0,0.12);
  max-height: 260px;
  overflow-y: auto;
  scrollbar-width: thin;
}

.search-list.hidden { display: none; }

.search-list li {
  padding: var(--space-3) var(--space-4);
  cursor: pointer;
  border-radius: var(--radius-sm);
  margin: 2px var(--space-1);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  transition: background 0.1s;
  line-height: 1.3;
}

.search-list li:hover,
.search-list li.active { background: var(--accent-dim); color: var(--accent); }

.search-list li .song-ja { font-weight: 600; font-size: var(--text-md); }
.search-list li .song-en { font-size: var(--text-xs); color: var(--muted); }
.search-list li .song-en.is-match { color: var(--text); font-weight: 500; }

.search-list li mark {
  background: transparent;
  color: var(--accent);
  font-weight: 700;
}

.next-area { margin-top: 12px; }
.next-area button { width: 100%; }

/* ─────────────────────────────────────────
   Ranking
───────────────────────────────────────── */
.ranking-controls {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.ranking-table {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.ranking-table table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  min-width: 320px;
}

.ranking-table th {
  padding: 10px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
}

.ranking-table td {
  padding: 10px;
  border-bottom: 1px solid var(--border-soft);
  color: var(--text);
}

.ranking-table tbody tr:hover { background: var(--accent-dim); }

.ranking-table .empty {
  text-align: center;
  color: var(--muted);
  padding: 32px;
}

/* ─────────────────────────────────────────
   Inline Result — right column of play-layout
───────────────────────────────────────── */
.result-nav {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-soft);
}

.result-nav__title {
  flex: 1;
  text-align: center;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.result-body {
  text-align: center;
  padding: var(--space-2) 0;
}

.result-correct {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--muted);
}

/* ─────────────────────────────────────────
   Result — failure state
───────────────────────────────────────── */
.result-content.is-failed .result-nav {
  justify-content: center;
}

.result-content.is-failed .result-nav__title {
  display: none;
}

.result-content.is-failed .result-time {
  display: none;
}

/* ─────────────────────────────────────────
   Result
───────────────────────────────────────── */
.result-panel { display: flex; flex-direction: column; gap: 20px; }

.result-rank-badge {
  font-size: clamp(36px, 6vw, 56px);
  line-height: 1.1;
  min-height: 1.2em;
}

.result-rank-badge.rank--gold   { color: #c9a227; }
.result-rank-badge.rank--silver { color: #8c9bab; }
.result-rank-badge.rank--bronze { color: #a0522d; }

.result-time {
  font-family: var(--font-mono);
  font-size: clamp(44px, 7vw, 72px);
  font-weight: 500;
  letter-spacing: 0.04em;
  line-height: 1;
  color: var(--accent);
}

.result-rank-text {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--muted);
  letter-spacing: 0.06em;
  min-height: 1.4em;
}

.result-song-label {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin-top: 4px;
  min-height: 1.4em;
}

.result-mode-label {
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted-light);
  min-height: 1.4em;
}

.save-block {
  display: grid;
  grid-template-columns: 1fr 140px;
  gap: 10px;
  align-items: end;
}

.save-block.hidden { display: none; }

.save-block label {
  display: block;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  margin-bottom: 8px;
}

.save-block input {
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  border: 2px solid var(--accent);
  background: var(--panel-strong);
  color: var(--text);
  font-family: inherit;
  font-size: 14px;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.save-block input:focus {
  outline: none;
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.share-block { display: flex; flex-direction: column; gap: 12px; }
.share-block.hidden { display: none; }

#share-canvas {
  width: 100%;
  max-width: 600px;
  height: auto;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  display: block;
}

.share-actions { display: flex; gap: 10px; flex-wrap: wrap; }

#share-x { border-color: var(--accent); color: var(--accent); }
#share-x:hover { background: var(--accent); color: #fff; }

.result-leaderboard {
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.result-leaderboard__label {
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 10px 12px 4px;
  margin: 0;
}

.result-leaderboard table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.result-leaderboard th {
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

.result-leaderboard td {
  padding: 9px 10px;
  border-bottom: 1px solid var(--border-soft);
  color: var(--text);
}

.result-leaderboard tbody tr:last-child td { border-bottom: none; }

.result-my-row td {
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  color: var(--accent);
  font-weight: 600;
}

.result-actions { display: flex; gap: 10px; flex-wrap: wrap; }

/* ─────────────────────────────────────────
   Footer
───────────────────────────────────────── */
.site-footer {
  flex-direction: column;
  gap: 6px;
  padding: 28px var(--space-page-x) 36px;
  color: var(--muted-light);
  font-size: 11px;
  letter-spacing: 0.04em;
  text-align: center;
}

.site-footer a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
  padding-bottom: 1px;
  transition: color 0.15s, border-color 0.15s;
}

.site-footer a:hover { color: var(--accent); border-color: var(--accent); }

/* ─────────────────────────────────────────
   Popup
───────────────────────────────────────── */
.popup-overlay {
  position: fixed;
  inset: 0;
  z-index: 500;
  background: rgba(26,23,20,0.5);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 48px 0 0;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
  overflow-y: auto;
}

.popup-overlay.is-open { opacity: 1; pointer-events: auto; }

.popup {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius) var(--radius) 0 0;
  padding: 32px 28px 40px;
  max-width: 600px;
  width: 100%;
  height: min(80vh, 720px);
  max-height: min(80vh, 720px);
  overflow-y: auto;
  box-shadow: 0 -8px 40px rgba(0,0,0,0.14);
  transform: translateY(30px);
  transition: transform 0.3s cubic-bezier(0.32, 0.72, 0, 1);
  position: relative;
}

.popup-overlay.is-open .popup { transform: translateY(0); }

.popup__close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  transition: border-color 0.15s, color 0.15s;
  cursor: pointer;
}

.popup__close:hover { border-color: var(--accent); color: var(--accent); }

.popup__title {
  font-family: var(--font-body);
  font-size: 22px;
  font-weight: 400;
  margin-bottom: 20px;
  color: var(--text);
}

.popup__section { margin-bottom: 18px; }

.popup__section h3 {
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}

.popup__section p,
.popup__section li {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
}

.popup__section ul { list-style: none; padding: 0; }

.popup__section ul li::before {
  content: "—  ";
  color: var(--accent);
  opacity: 0.6;
}

/* ─────────────────────────────────────────
   Device blocker (below 904px)
───────────────────────────────────────── */
.device-blocker {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: none;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-6);
  background: rgba(5, 4, 10, 0.5);
  backdrop-filter: blur(12px);
  color: #f5f2f8;
}

.device-blocker__inner {
  max-width: 520px;
  width: 100%;
  padding: var(--space-7) var(--space-6);
  border-radius: var(--radius);
  font-size: clamp(14px, 3.6vw, 18px);
  line-height: 1.6;
  letter-spacing: 0.02em;
}

.popup__badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  background: var(--accent-dim);
  color: var(--accent);
  border-radius: 4px;
  padding: 2px 7px;
  margin-right: 4px;
}

/* ─────────────────────────────────────────
   Misc
───────────────────────────────────────── */
.song-time-display {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  color: var(--accent);
  letter-spacing: 0.04em;
  min-height: 1.8em;
  text-align: center;
}

.song-answer {
  font-size: 12px;
  color: var(--muted);
  text-align: center;
  margin-top: 6px;
}

/* ─────────────────────────────────────
   Flash Mode — カウントダウン
───────────────────────────────────── */
.flash-countdown-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 12px 0 4px;
}

.flash-countdown {
  font-family: var(--font-mono);
  font-size: clamp(52px, 9vw, 76px);
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--text);

  /* 円形バッジ */
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 116px;
  height: 116px;
  border-radius: 50%;
  border: 2px solid var(--border-soft);
  background: var(--panel-soft);
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);

  /* 色変化はスムーズに */
  transition:
    color        0.2s ease,
    border-color 0.2s ease,
    background   0.2s ease,
    box-shadow   0.2s ease;

  /* 毎秒のビート */
  animation: flash-beat 1s ease-in-out infinite;
}

/* 残り 3 秒以下 — 赤く強調 */
.flash-countdown.urgent {
  color: var(--danger);
  border-color: rgba(192, 57, 43, 0.45);
  background: rgba(192, 57, 43, 0.06);
  box-shadow:
    0 0 0 5px rgba(192, 57, 43, 0.10),
    0 2px 16px rgba(192, 57, 43, 0.15);
  animation: flash-beat-urgent 0.5s ease-in-out infinite;
}

@keyframes flash-beat {
  0%, 100% { transform: scale(1); }
  10%       { transform: scale(1.05); }
  20%       { transform: scale(1); }
}

@keyframes flash-beat-urgent {
  0%, 100% { transform: scale(1); }
  20%       { transform: scale(1.08); }
  40%       { transform: scale(1); }
}

@media (max-width: 904px) {
  .device-blocker { display: flex; }
  body { overflow: hidden; }
}


/* ═══════════════════════════════════════════════════════════════
   IMMERSIVE DARK THEME — body.not-home
   ホーム画面以外のすべてのビューに適用される没入感デザイン
   ホーム画面（.home-only, .home-panel等）には一切影響しない
═══════════════════════════════════════════════════════════════ */

/* ─────────────────────────────────────
   ダークテーマ用 CSS変数オーバーライド
───────────────────────────────────── */
body.not-home {
  --bg:           #08070d;
  --panel:        rgba(18, 16, 28, 0.85);
  --panel-soft:   rgba(24, 22, 36, 0.7);
  --panel-strong: rgba(30, 28, 44, 0.9);
  --text:         #eae8f0;
  --muted:        #8a869e;
  --muted-light:  #5c5875;
  --accent:       #e8603e;
  --accent-dim:   rgba(232, 96, 62, 0.12);
  --accent-glow:  rgba(232, 96, 62, 0.35);
  --border:       rgba(255, 255, 255, 0.1);
  --border-soft:  rgba(255, 255, 255, 0.06);
  --border-glow:  rgba(232, 96, 62, 0.3);
  --gold:         #f0c040;
  --gold-dim:     rgba(240, 192, 64, 0.15);
  --gold-glow:    rgba(240, 192, 64, 0.5);

  /* 深夜の会場 — ノイズグレイン + 深紫ベース */
  background-color: var(--bg);
  background-image:
    radial-gradient(ellipse 80% 60% at 50% -10%, rgba(80, 40, 120, 0.25) 0%, transparent 70%),
    radial-gradient(ellipse 60% 40% at 100% 80%, rgba(180, 60, 30, 0.1) 0%, transparent 60%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  background-attachment: fixed;
  color: var(--text);
}

/* ─────────────────────────────────────
   page-nav — ダーク化
───────────────────────────────────── */
body.not-home .page-nav {
  border-bottom: 1px solid var(--border);
  padding-bottom: 18px;
  margin-bottom: 4px;
}

body.not-home .page-nav__title {
  color: var(--text);
  font-weight: 300;
  letter-spacing: 0.05em;
}

/* ─────────────────────────────────────
   Panel — グラスモーフィズム
───────────────────────────────────── */
body.not-home .panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(24px) saturate(140%);
  -webkit-backdrop-filter: blur(24px) saturate(140%);
  box-shadow:
    0 1px 0 rgba(255,255,255,0.06) inset,
    0 24px 64px rgba(0, 0, 0, 0.5),
    0 4px 16px rgba(0, 0, 0, 0.3);
}

/* ─────────────────────────────────────
   ボタン — ダーク ghost
───────────────────────────────────── */
body.not-home button.ghost {
  border-color: var(--border);
  color: var(--muted);
  background: rgba(255,255,255,0.03);
}
body.not-home button.ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
  box-shadow: 0 0 12px var(--accent-glow);
}
body.not-home button.ghost:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* segmented */
body.not-home .segmented {
  background: rgba(255,255,255,0.04);
  border-color: var(--border);
}
body.not-home .segmented button {
  color: var(--muted);
}
body.not-home .segmented button.active {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 0 16px var(--accent-glow);
}

/* ─────────────────────────────────────
   Inputs / Selects
───────────────────────────────────── */
body.not-home .control input,
body.not-home .control select,
body.not-home .answer-area input,
body.not-home .ranking-controls select,
body.not-home .save-block input {
  background: rgba(255,255,255,0.05);
  border-color: var(--border);
  color: var(--text);
}
body.not-home .control input:focus,
body.not-home .answer-area input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
  background: rgba(255,255,255,0.07);
  outline: none;
}
body.not-home .control label,
body.not-home .save-block label {
  color: var(--muted);
}

/* ─────────────────────────────────────
   Player Panel
───────────────────────────────────── */
body.not-home .player-panel {
  background: transparent;
  border: none;
  box-shadow: none;
  padding-left: 0;
  padding-right: 0;
}

body.not-home .sub-nav {
  border-bottom: 1px solid var(--border);
  padding-bottom: 14px;
}

body.not-home .video-meta { color: var(--muted); }
body.not-home .video-meta .label { color: var(--muted-light); }
body.not-home .video-meta .divider { color: var(--border); }

/* 動画ラッパー — ステージライト */
body.not-home .video-wrapper {
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius);
  background: #000;
  box-shadow:
    0 0 0 1px rgba(255,255,255,0.04) inset,
    0 32px 80px rgba(0,0,0,0.7),
    0 0 60px rgba(80,40,120,0.15);
}

/* オーバーレイ — ダーク */
body.not-home .overlay {
  background: #08070d;
}
body.not-home .overlay::after {
  color: var(--muted-light);
  letter-spacing: 0.2em;
  font-size: 11px;
}

/* ─────────────────────────────────────
   Timer — 脈打つグロー
───────────────────────────────────── */
body.not-home .timer-area {
  position: relative;
}

body.not-home .timer {
  color: var(--text);
  font-weight: 400;
  text-shadow:
    0 0 40px rgba(232, 96, 62, 0.2),
    0 0 80px rgba(232, 96, 62, 0.08);
  transition: color 0.3s, text-shadow 0.3s;
}

/* 計測中はタイマーが赤く光る */
body.not-home .player-panel.play-active .timer {
  color: var(--accent);
  animation: timer-pulse 2s ease-in-out infinite;
}

@keyframes timer-pulse {
  0%, 100% {
    text-shadow:
      0 0 30px rgba(232, 96, 62, 0.4),
      0 0 60px rgba(232, 96, 62, 0.2);
  }
  50% {
    text-shadow:
      0 0 50px rgba(232, 96, 62, 0.7),
      0 0 100px rgba(232, 96, 62, 0.35),
      0 0 140px rgba(232, 96, 62, 0.15);
  }
}

body.not-home .status { color: var(--muted); }

/* ─────────────────────────────────────
   Answer Input — 光る入力欄
───────────────────────────────────── */
body.not-home .search-wrap input {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.15);
  color: var(--text);
  caret-color: var(--accent);
  border-radius: var(--radius);
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}
body.not-home .search-wrap input:focus {
  background: rgba(255,255,255,0.08);
  border-color: var(--accent);
  box-shadow:
    0 0 0 3px rgba(232,96,62,0.2),
    0 0 20px rgba(232,96,62,0.1);
  outline: none;
}
body.not-home .search-wrap input::placeholder { color: var(--muted-light); }

/* 検索リスト */
body.not-home .search-list {
  background: rgba(14, 12, 22, 0.96);
  border: 1px solid rgba(255,255,255,0.1);
  backdrop-filter: blur(20px);
  box-shadow: 0 20px 60px rgba(0,0,0,0.6);
}
body.not-home .search-list li {
  color: var(--text);
}
body.not-home .search-list li:hover,
body.not-home .search-list li.active {
  background: var(--accent-dim);
  color: var(--accent);
}
body.not-home .search-list li .song-en { color: var(--muted); }
body.not-home .search-list li .song-en.is-match { color: var(--text); }
body.not-home .search-list li mark {
  color: var(--accent);
  background: transparent;
}

/* ─────────────────────────────────────
   Next-area / Song time display
───────────────────────────────────── */
body.not-home .next-area button {
  border-color: rgba(255,255,255,0.15);
  color: var(--text);
}
body.not-home .next-area button:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
}
body.not-home .song-time-display {
  color: var(--accent);
  text-shadow: 0 0 20px var(--accent-glow);
}

body.view-setup {
  background-image: var(--bg-gradient);
  background-size: cover;
  background-position: center top;
  background-attachment: fixed;
}

/* setup画面：mainを縦横中央揃え */
body.view-setup main {
  justify-content: center;
  align-items: center;
}

body.view-setup #view-setup {
  width: 100%;
  max-width: 760px;
}

/* ─────────────────────────────────────
   Setup Panel — ダーク
───────────────────────────────────── */
body.not-home .setup-panel {
  background-color: rgba(8, 7, 13, 0.45);
  background-image: none;
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  box-shadow: 0 4px 24px rgba(0,0,0,0.4);
  border-color: rgba(255,255,255,0.1);
}

/* setup-panel内のグラデーションオーバーレイは不要になるので除去 */
body.not-home .setup-panel::before {
  display: none;
}

body.not-home .setup-left { position: relative; z-index: 1; }
body.not-home .setup-panel > .ranking-table { position: relative; z-index: 1; }

/* ─────────────────────────────────────────
   Ranking Panel — ダーク
───────────────────────────────────────── */
.ranking-panel {
  padding: 0 !important;
  overflow: visible;
  position: relative;
  display: flex;
  align-items: stretch;
  min-height: 240px;
}

.ranking-left {
  width: 300px;
  flex-shrink: 0;
  padding: var(--space-7) var(--space-6);
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.ranking-controls {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.ranking-control label {
  display: block;
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin-bottom: var(--space-2);
}

.ranking-right {
  flex: 1;
  padding: 24px 20px;
  position: relative;
  z-index: 1;
  overflow-x: auto;
}

body.not-home .ranking-panel {
  background-color: rgba(8, 7, 13, 0.45);
  background-image: none;
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  border-color: rgba(255,255,255,0.1);
}

body.not-home .ranking-panel::before {
  display: none;
}

body.view-ranking {
  background-image:
    linear-gradient(
      to right,
      rgba(8, 7, 13, 0.8) 0%,
      rgba(8, 7, 13, 0.95) 100%
    ),
    var(--bg-gradient);
  background-size: cover;
  background-position: center top;
  background-attachment: fixed;
}

body.view-ranking main {
  justify-content: center;
  align-items: center;
}

body.view-ranking #view-ranking {
  width: 100%;
  max-width: 900px;
}

body.not-home .ranking-left,
body.not-home .ranking-right { position: relative; z-index: 1; }

/* ─────────────────────────────────────
   Result Nav — ダーク
───────────────────────────────────── */
body.not-home .result-nav {
  border-bottom-color: var(--border);
}

body.not-home .result-nav__title { color: var(--muted-light); }

/* ─────────────────────────────────────
   Setup / Ranking テーブル — ダーク
───────────────────────────────────── */
body.not-home .ranking-table table { color: var(--text); }
body.not-home .ranking-table th {
  color: var(--muted-light);
  border-bottom-color: var(--border);
}
body.not-home .ranking-table td { border-bottom-color: var(--border-soft); }
body.not-home .ranking-table tbody tr:hover { background: rgba(255,255,255,0.04); }
body.not-home .ranking-table .empty { color: var(--muted); }

body.not-home .ranking-controls select {
  background: rgba(255,255,255,0.05);
  border-color: var(--border);
  color: var(--text);
}

/* ─────────────────────────────────────
   Result Panel — 結果画面
───────────────────────────────────── */
body.not-home .result-panel {
  position: relative;
  overflow: hidden;
}

/* 結果タイム — 輝くモノ */
body.not-home .result-time {
  color: var(--text);
  font-weight: 300;
  letter-spacing: 0.06em;
  text-shadow:
    0 0 60px rgba(255,255,255,0.15),
    0 2px 4px rgba(0,0,0,0.5);
}

body.not-home #result-message {
  color: var(--muted);
  letter-spacing: 0.08em;
  font-size: 12px;
  text-transform: uppercase;
}

/* result rank (hidden after congrats refactor, fallback) */
body.not-home .result-rank {
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 18px;
  letter-spacing: 0.08em;
}

/* Result leaderboard — ダーク */
body.not-home .result-leaderboard {
  border-color: var(--border);
  background: rgba(255,255,255,0.02);
}
body.not-home .result-leaderboard__label { color: var(--muted-light); }
body.not-home .result-leaderboard th {
  border-bottom-color: var(--border);
  color: var(--muted-light);
}
body.not-home .result-leaderboard td {
  border-bottom-color: var(--border-soft);
  color: var(--text);
}
body.not-home .result-my-row td {
  background: rgba(232, 96, 62, 0.12);
  color: var(--accent);
}

body.not-home .result-actions {
  margin-top: 4px;
}

/* ─────────────────────────────────────
   Congrats Block — おめでとう画面
   ゴールドの爆発、没入感MAX
───────────────────────────────────── */
@keyframes congrats-enter {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.97);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes rank-pop {
  0%   { transform: scale(0.5); opacity: 0; }
  60%  { transform: scale(1.12); opacity: 1; }
  80%  { transform: scale(0.96); }
  100% { transform: scale(1); }
}

@keyframes shimmer {
  0%   { background-position: -200% center; }
  100% { background-position: 200% center; }
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50%       { transform: translateY(-6px); }
}

@keyframes gold-pulse {
  0%, 100% {
    box-shadow:
      0 0 30px rgba(240,192,64,0.2),
      0 0 60px rgba(240,192,64,0.08),
      0 1px 0 rgba(255,255,255,0.1) inset;
  }
  50% {
    box-shadow:
      0 0 50px rgba(240,192,64,0.4),
      0 0 100px rgba(240,192,64,0.2),
      0 1px 0 rgba(255,255,255,0.15) inset;
  }
}

.congrats-block {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

body.not-home .congrats-block {
  position: relative;
  background: rgba(20, 18, 30, 0.8);
  border: 1px solid rgba(240, 192, 64, 0.2);
  border-radius: var(--radius);
  padding: 20px 18px 18px;
  overflow: hidden;
  animation: congrats-enter 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

/* 背景の光芒 - removed */

/* 上部ゴールドライン - removed */

.congrats-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  text-align: center;
  position: relative;
  z-index: 1;
}

.congrats-emoji {
  font-size: 32px;
  line-height: 1;
  display: block;
  margin-bottom: 4px;
}

.congrats-title {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: clamp(20px, 3.5vw, 28px);
  letter-spacing: -0.01em;
  color: var(--gold);
}

body.not-home .congrats-title {
  color: var(--gold, #f0c040);
}

.congrats-subtitle {
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}

body.not-home .congrats-subtitle {
  color: rgba(240,192,64,0.5);
  letter-spacing: 0.25em;
}

.congrats-rank-display {
  font-family: var(--font-mono);
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 500;
  line-height: 1;
  color: var(--gold, #f0c040);
  margin: 8px 0 4px;
  animation: rank-pop 0.6s cubic-bezier(0.34, 1.56, 0.64, 1) both 0.2s;
}

body.not-home .congrats-rank-display {
  color: var(--gold, #f0c040);
  animation: rank-pop 0.6s cubic-bezier(0.34, 1.56, 0.64, 1) both 0.2s;
}

.congrats-summary {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
  text-transform: uppercase;
}

/* ─────────────────────────────────────
   Badge Block — バッジ
───────────────────────────────────── */
body.not-home .badge-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  position: relative;
  z-index: 1;
}

body.not-home #badge-canvas {
  width: 100%;
  max-width: 520px;
  height: auto;
  display: block;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(240,192,64,0.2);
  box-shadow:
    0 8px 32px rgba(0,0,0,0.5),
    0 0 40px rgba(240,192,64,0.1);
}

/* ─────────────────────────────────────
   Badge Actions — シェアボタン
───────────────────────────────────── */
.badge-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
  position: relative;
  z-index: 1;
}

body.not-home .badge-actions {
  margin-top: 4px;
}

/* X シェアボタン — 強調 */
body.not-home #share-x-btn {
  border-color: rgba(240,192,64,0.4);
  color: var(--gold);
  background: rgba(240,192,64,0.06);
  position: relative;
  overflow: hidden;
}
body.not-home #share-x-btn::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(240,192,64,0.12) 50%,
    transparent 100%
  );
  background-size: 200% auto;
  opacity: 0;
  transition: opacity 0.3s;
}
body.not-home #share-x-btn:hover {
  border-color: var(--gold);
  color: var(--gold);
  background: rgba(240,192,64,0.12);
  box-shadow: 0 0 16px rgba(240,192,64,0.25);
}
body.not-home #share-x-btn:hover::before {
  opacity: 1;
}

/* ダウンロードボタン — サブトル */
body.not-home #download-badge-btn {
  color: var(--muted);
  border-color: var(--border);
}
body.not-home #download-badge-btn:hover {
  color: var(--text);
  border-color: rgba(255,255,255,0.25);
  background: rgba(255,255,255,0.05);
  box-shadow: none;
}

/* ─────────────────────────────────────
   Save Block — 名前入力（congrats内）
───────────────────────────────────── */
body.not-home .save-block {
  display: flex;
  flex-direction: column;
  gap: 10px;
  position: relative;
  z-index: 1;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  width: 100%;
  max-width: min(720px, 100%);
  margin: 0 auto;
}

body.not-home .save-block.hidden {
  display: none;
}

.save-block__hint {
  font-size: 10px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 2px;
}

.save-block__row {
  display: flex;
  flex-wrap: wrap;
  width: 100%;
  gap: 10px;
  align-items: center;
  justify-content: center;
}

body.not-home .save-block input {
  flex: 1 1 360px;
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.12);
  color: var(--text);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  caret-color: var(--gold);
  transition: border-color 0.2s, box-shadow 0.2s;
  min-width: 0;
}
body.not-home .save-block input:focus {
  border-color: rgba(240,192,64,0.5);
  box-shadow: 0 0 0 3px rgba(240,192,64,0.12);
  background: rgba(255,255,255,0.09);
  outline: none;
}
body.not-home .save-block input::placeholder { color: var(--muted-light); }

body.not-home #save-score {
  border-color: rgba(240,192,64,0.35);
  color: var(--gold);
  background: rgba(240,192,64,0.06);
  white-space: nowrap;
}
body.not-home #save-score:hover {
  border-color: var(--gold);
  background: rgba(240,192,64,0.15);
  box-shadow: 0 0 12px rgba(240,192,64,0.2);
}
body.not-home #save-score:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ─────────────────────────────────────
   Popup — ダーク
───────────────────────────────────── */
body.not-home .popup-overlay {
  background: rgba(4, 3, 10, 0.75);
  backdrop-filter: blur(8px);
}

body.not-home .popup {
  background: rgba(16, 14, 26, 0.97);
  border: 1px solid rgba(255,255,255,0.12);
  box-shadow: 0 40px 80px rgba(0,0,0,0.7);
  backdrop-filter: blur(20px);
}

body.not-home .popup__title { color: var(--text); }

body.not-home .popup__close {
  border-color: var(--border);
  color: var(--muted);
}
body.not-home .popup__close:hover {
  border-color: var(--accent);
  color: var(--accent);
}

body.not-home .popup__section h3 { color: var(--accent); }
body.not-home .popup__section p,
body.not-home .popup__section li { color: var(--muted); }
body.not-home .popup__section ul li::before { color: var(--accent); }
body.not-home .popup__badge {
  background: var(--accent-dim);
  color: var(--accent);
}

/* ─────────────────────────────────────
   Badge Popup
───────────────────────────────────── */
.badge-popup {
  max-width: 560px;
}

.badge-block {
  display: flex;
  justify-content: center;
}

.badge-block canvas {
  width: 100%;
  max-width: 520px;
  height: auto;
  display: block;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.badge-popup-actions {
  display: flex;
  justify-content: center;
  margin-top: var(--space-3);
}

/* ─────────────────────────────────────
   sr-only ユーティリティ
───────────────────────────────────── */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}