:root {
  --bg: #000;
  --fg: #fff;
  --dim: rgba(255, 255, 255, 0.35);
  --faint: rgba(255, 255, 255, 0.2);
  --accent: #39c5bb; /* Miku teal */
  --accent-dim: #1d7b74;
  --danger: #ff6b6b;
  --pad: max(env(safe-area-inset-left), 16px);
  --bottom-safe: max(env(safe-area-inset-bottom), 16px);
  --top-safe: max(env(safe-area-inset-top), 12px);
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, "Hiragino Sans", "Hiragino Kaku Gothic ProN",
               "Yu Gothic", "Noto Sans CJK JP", sans-serif;
  overflow: hidden;
  overscroll-behavior: none;
  -webkit-user-select: none;
  user-select: none;
}

button {
  font-family: inherit;
  color: var(--fg);
  background: transparent;
  border: 1px solid var(--dim);
  border-radius: 10px;
  padding: 12px 16px;
  font-size: 16px;
  cursor: pointer;
}
button:active { background: rgba(255, 255, 255, 0.1); }

.view {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
}
.hidden { display: none !important; }

/* ===== Setlist ===== */
.setlist-header {
  padding: var(--top-safe) var(--pad) 8px;
  border-bottom: 1px solid var(--faint);
}
#concert-title {
  font-size: 22px;
  margin: 0;
  color: var(--accent);
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 10px;
}
.title-deco {
  height: 40px;
  width: auto;
  object-fit: contain;
  image-rendering: auto;
}
.hint {
  font-size: 12px;
  color: var(--dim);
  margin-top: 4px;
}
#picker-cards {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 24px var(--pad) var(--bottom-safe);
  align-items: stretch;
  justify-content: center;
}
.picker-card {
  background: linear-gradient(135deg, rgba(57,197,187,0.18), rgba(57,197,187,0.04));
  border: 1.5px solid var(--accent-dim);
  border-radius: 18px;
  padding: 24px 22px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  color: var(--fg);
  text-align: left;
  font-family: inherit;
  cursor: pointer;
}
.picker-card:active { transform: scale(0.98); }
.picker-card .letter {
  font-size: 40px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.08em;
  line-height: 1;
}
.picker-card .count {
  font-size: 12px;
  color: var(--dim);
  letter-spacing: 0.05em;
}
.picker-card .preview {
  font-size: 13px;
  color: rgba(255,255,255,0.7);
  margin-top: 8px;
  line-height: 1.4;
}
.setlist-inner-header {
  display: flex;
  align-items: center;
  gap: 10px;
}
#current-setlist-title {
  font-size: 20px;
  margin: 0;
  color: var(--accent);
  letter-spacing: 0.08em;
}

.pwa-hint {
  margin-top: 8px;
  padding: 8px 32px 8px 12px;
  background: rgba(57, 197, 187, 0.12);
  border: 1px solid var(--accent-dim);
  border-radius: 8px;
  font-size: 12px;
  color: var(--accent);
  position: relative;
  line-height: 1.4;
}
.pwa-hint b { color: var(--fg); }
.pwa-dismiss {
  position: absolute;
  top: 4px; right: 6px;
  background: transparent;
  border: none;
  color: var(--dim);
  font-size: 18px;
  padding: 2px 6px;
  line-height: 1;
}
#setlist {
  list-style: none;
  margin: 0;
  padding: 0 0 var(--bottom-safe);
  overflow-y: auto;
  flex: 1;
}
#setlist li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px var(--pad);
  border-bottom: 1px solid var(--faint);
}
#setlist li:active { background: rgba(255, 255, 255, 0.05); }
.idx {
  color: var(--dim);
  font-variant-numeric: tabular-nums;
  min-width: 28px;
  text-align: right;
  font-size: 14px;
}
.meta { flex: 1; min-width: 0; }
.title-ja {
  font-size: 17px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.artist {
  font-size: 12px;
  color: var(--dim);
  margin-top: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.mode-tag {
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--faint);
  color: var(--dim);
  letter-spacing: 0.05em;
}
.mode-tag.timed { color: var(--accent); border-color: var(--accent-dim); }
.mode-tag.pseudo { color: #f2d15e; border-color: #8a7a31; }

/* ===== Song view ===== */
.song-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: var(--top-safe) var(--pad) 10px;
  border-bottom: 1px solid var(--faint);
}
.icon-btn {
  border: none;
  padding: 8px 10px;
  font-size: 22px;
  line-height: 1;
}
.song-meta { flex: 1; min-width: 0; }
#song-title {
  font-size: 16px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
#song-artist {
  font-size: 11px;
  color: var(--dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
#mode-badge {
  font-size: 10px;
  padding: 3px 7px;
  border-radius: 4px;
  border: 1px solid var(--faint);
  color: var(--dim);
  letter-spacing: 0.05em;
}
#mode-badge.timed { color: var(--accent); border-color: var(--accent-dim); }

#lyrics-scroll {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  scroll-behavior: smooth;
  padding: 40vh var(--pad);
  -webkit-mask-image: linear-gradient(
    to bottom,
    transparent 0%,
    #000 15%,
    #000 85%,
    transparent 100%
  );
  mask-image: linear-gradient(
    to bottom,
    transparent 0%,
    #000 15%,
    #000 85%,
    transparent 100%
  );
}
#lyrics {
  list-style: none;
  margin: 0;
  padding: 0;
}
#lyrics li {
  text-align: center;
  padding: 14px 0;
  color: var(--fg);
  transition: color 0.3s ease, transform 0.3s ease, opacity 0.3s ease;
  opacity: 0.75;
}
#lyrics li .ja {
  font-size: 22px;
  line-height: 1.45;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--fg);
}
#lyrics li .en {
  font-size: 14px;
  line-height: 1.4;
  margin-top: 6px;
  color: rgba(255, 255, 255, 0.78);
}
#lyrics li.current {
  opacity: 1;
  transform: scale(1.08);
}
#lyrics li.current .ja {
  font-size: 26px;
  color: var(--accent);
  text-shadow: 0 0 18px rgba(57, 197, 187, 0.35);
}
#lyrics li.current .en {
  color: var(--accent);
  opacity: 0.85;
  font-size: 15px;
}

#controls {
  padding: 10px var(--pad) var(--bottom-safe);
  border-top: 1px solid var(--faint);
  background: var(--bg);
}
#timed-controls {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  gap: 6px;
}
#timed-controls .toggle {
  min-width: 140px;
}
.toggle {
  font-size: 13px;
  padding: 6px 12px;
  white-space: nowrap;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: transparent;
  border: none;
}
.toggle[aria-pressed="true"] { background: transparent; }
.miku-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 72px;
  flex-shrink: 0;
}
.miku-icon svg, .miku-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.follow-pill {
  display: inline-block;
  padding: 10px 20px;
  border: 1px solid var(--dim);
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--fg);
  background: rgba(255, 255, 255, 0.04);
}
.toggle[aria-pressed="true"] .follow-pill {
  background: rgba(57, 197, 187, 0.15);
  border-color: var(--accent);
  color: var(--accent);
}
.toggle[aria-pressed="false"] .follow-pill {
  opacity: 0.55;
}
.toggle[aria-pressed="false"] .miku-icon {
  opacity: 0.5;
}
#manual-controls {
  display: grid;
  grid-template-columns: 1fr 3fr;
  gap: 8px;
}
.primary {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--fg);
  font-size: 17px;
  font-weight: 600;
  padding: 16px;
  letter-spacing: 0.03em;
}
.primary.playing {
  background: transparent;
  border-color: var(--danger);
  color: var(--danger);
}
.nudge {
  font-size: 14px;
  padding: 14px 0;
}
#offset-display {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--dim);
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  padding-top: 4px;
}

/* ===== Wide screen / landscape ===== */
@media (min-width: 700px) {
  #lyrics li .ja { font-size: 30px; line-height: 1.4; }
  #lyrics li .en { font-size: 18px; margin-top: 8px; }
  #lyrics li.current .ja { font-size: 42px; }
  #lyrics li.current .en { font-size: 22px; }
  #lyrics li { padding: 18px 0; }
  #lyrics {
    max-width: 1000px;
    margin: 0 auto;
  }
  #concert-title { font-size: 28px; }
  #song-title { font-size: 20px; }
  #song-artist { font-size: 13px; }
  .setlist-header, .song-header, #controls {
    padding-left: max(var(--pad), calc((100% - 1000px) / 2));
    padding-right: max(var(--pad), calc((100% - 1000px) / 2));
  }
  .primary { font-size: 18px; padding: 18px; }
  .title-ja { font-size: 19px; }
  .artist { font-size: 13px; }
}
@media (min-width: 1100px) {
  #lyrics li .ja { font-size: 36px; }
  #lyrics li.current .ja { font-size: 52px; }
  #lyrics li .en { font-size: 22px; }
  #lyrics li.current .en { font-size: 26px; }
}

/* Floating "return to current line" button (shown when user has scrolled away) */
#return-btn {
  position: fixed;
  left: 50%;
  bottom: calc(120px + var(--bottom-safe));
  transform: translateX(-50%);
  background: var(--accent);
  color: #000;
  border: none;
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  box-shadow: 0 4px 20px rgba(57, 197, 187, 0.4);
  z-index: 10;
  letter-spacing: 0.03em;
}