:root {
  --bg: #0b0b10;
  --panel: #16161f;
  --panel-2: #1e1e2a;
  --text: #e9e9f2;
  --dim: #8a8aa5;
  --faint: #3c3c52;
  --accent: #ff4d8d;
  --accent-soft: #ff87b3;
  --ruby: #9fd8ff;
  --gold: #b9976a;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

* { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: "Yu Gothic UI", "Hiragino Sans", "Noto Sans JP", system-ui, sans-serif;
  overscroll-behavior: none;
}

/* Chinese shares Unicode codepoints with Japanese kanji but the two scripts
   have different standard glyph shapes (Han unification) — without this,
   Chinese text would render with the Japanese-first font stack above. */
:lang(zh) { font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Noto Sans CJK SC", system-ui, sans-serif; }

.hidden { display: none !important; }
.invisible { visibility: hidden !important; pointer-events: none; }

.view {
  position: fixed;
  inset: 0;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.2s ease, visibility 0s linear 0.2s;
}
.view.view-active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transition: opacity 0.2s ease, visibility 0s linear 0s;
}

/* ---------- headers ---------- */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px 10px;
}
.app-header h1 { font-size: 22px; font-weight: 800; letter-spacing: 1px; flex-shrink: 0; }
.app-header h2 { font-size: 17px; font-weight: 700; }
.logo-accent { color: var(--accent); }
.logo-sub { font-size: 12px; color: var(--dim); font-weight: 400; margin-left: 6px; }

.app-share-btn {
  background: var(--panel);
  color: var(--dim);
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 12px;
  font-size: 13px;
  font-weight: 600;
  flex-shrink: 0;
}
.app-share-btn:active { color: var(--text); background: var(--panel-2); }

/* ---------- buttons ---------- */
button { font-family: inherit; border: none; cursor: pointer; }
.icon-btn { display: inline-flex; align-items: center; justify-content: center; }
.header-nav-btn {
  width: 34px;
  height: 34px;
  padding: 0;
  font-size: 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.btn-primary {
  background: linear-gradient(135deg, #ff4d8d, #b44dff);
  color: #fff;
  border-radius: 12px;
  padding: 10px 18px;
  font-size: 15px;
  font-weight: 700;
}
.btn-primary:active { filter: brightness(1.15); }
.btn-primary:disabled { opacity: 0.5; }
.btn-big { width: 100%; padding: 15px; font-size: 17px; }
.btn-ghost {
  background: none;
  color: var(--dim);
  font-size: 17px;
  padding: 6px 10px;
  border-radius: 8px;
}
.btn-ghost:active { color: var(--text); }

/* ---------- library ---------- */
.song-list { flex: 1; overflow-y: auto; padding: 4px 16px; }
.song-card {
  background: var(--panel);
  border-radius: 14px;
  padding: 14px 16px;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.song-card-main { flex: 1; min-width: 0; }
.song-card-title { font-size: 17px; font-weight: 700; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.song-card-sub { font-size: 13px; color: var(--dim); margin-top: 3px; }
.song-card-tags { display: flex; align-items: center; gap: 6px; margin-top: 6px; }
.song-card-lang-tag {
  background: var(--accent-soft);
  color: #1a0a12;
  font-size: 10px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 6px;
  flex-shrink: 0;
}
.song-card-video-icon { color: var(--dim); display: inline-flex; flex-shrink: 0; }
.song-card-btn {
  background: var(--panel-2);
  color: var(--dim);
  border-radius: 10px;
  padding: 9px 12px;
  font-size: 14px;
  flex-shrink: 0;
}
.song-card-btn:active { color: var(--text); }
.song-card-btn.published { color: var(--accent-soft); }
.song-card-btn:disabled { opacity: 0.35; }
.song-card-btn:disabled:active { color: var(--dim); }
.empty-library {
  text-align: center;
  color: var(--dim);
  padding: 60px 30px;
  font-size: 15px;
  line-height: 1.9;
}

/* ---------- search bar ---------- */
.search-bar {
  position: relative;
  display: flex;
  gap: 8px;
  padding: 0 16px 10px;
  flex-shrink: 0;
}
.search-input {
  flex: 1;
  min-width: 0;
  background: var(--panel);
  border: 1px solid var(--faint);
  border-radius: 10px;
  color: var(--text);
  font-family: inherit;
  font-size: 15px;
  padding: 10px 12px;
  outline: none;
}
.search-input::placeholder { color: var(--dim); font-weight: 400; opacity: 1; }
.search-input:focus { border-color: var(--accent); }
.search-btn {
  background: var(--panel);
  color: var(--dim);
  border-radius: 10px;
  width: 40px;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.search-btn:active { color: var(--text); background: var(--panel-2); }
.search-btn:disabled { opacity: 0.35; }
.search-btn:disabled:active { color: var(--dim); background: var(--panel); }

.sort-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 16px 10px;
}
.sort-label { font-size: 13px; color: var(--dim); flex-shrink: 0; }
.sort-bar select {
  flex: 1;
  min-width: 0;
  background: var(--panel);
  border: 1px solid var(--faint);
  border-radius: 10px;
  color: var(--text);
  font-family: inherit;
  font-size: 14px;
  padding: 8px 10px;
}
.sort-dir-btn {
  background: var(--panel);
  color: var(--dim);
  border-radius: 10px;
  width: 38px;
  height: 36px;
  flex-shrink: 0;
  font-size: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.sort-dir-btn:active { color: var(--text); background: var(--panel-2); }
.sort-dir-btn.spinning svg { animation: spin 0.6s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

.search-suggestions {
  position: absolute;
  left: 16px;
  right: 56px;
  top: calc(100% - 4px);
  background: var(--panel-2);
  border: 1px solid var(--faint);
  border-radius: 12px;
  overflow: hidden;
  z-index: 20;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  transform-origin: top center;
  transform: scaleY(0.85) translateY(-6px);
  opacity: 0;
  transition: opacity 0.15s ease, transform 0.15s ease;
}
.search-suggestions.open {
  transform: scaleY(1) translateY(0);
  opacity: 1;
}
.suggestion-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-bottom: 1px solid var(--faint);
}
.suggestion-item:last-child { border-bottom: none; }
.suggestion-item:active { background: var(--panel); }
.suggestion-icon { flex-shrink: 0; color: var(--dim); display: flex; }
.suggestion-text { min-width: 0; flex: 1; }
.suggestion-title { font-size: 14px; font-weight: 700; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.suggestion-sub { font-size: 12px; color: var(--dim); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* ---------- pagination ---------- */
.pagination { display: flex; align-items: center; justify-content: center; gap: 16px; padding: 8px 0 20px; }
.page-btn {
  background: var(--panel); color: var(--text);
  border: 1px solid var(--faint); border-radius: 8px;
  width: 40px; height: 34px; font-size: 18px; line-height: 1; cursor: pointer;
}
.page-btn:disabled { opacity: 0.35; cursor: default; }
.page-label { color: var(--dim); font-size: 14px; font-variant-numeric: tabular-nums; }

/* ---------- artist autocomplete (editor) ---------- */
.artist-field { position: relative; }
.artist-field input { width: 100%; } /* match the full-width title input (wrapping in .artist-field dropped the flex stretch) */
.artist-suggestions { left: 0; right: 0; z-index: 30; }

/* ---------- toast ---------- */
.toast {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--panel-2);
  color: var(--text);
  padding: 14px 22px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  z-index: 100;
  opacity: 0;
  transition: opacity 0.3s;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  text-align: center;
  max-width: 80vw;
  pointer-events: none;
}
.toast.show { opacity: 1; }
.library-footer { padding: 12px 16px calc(14px + var(--safe-bottom)); }
.btn-share { width: 100%; text-align: center; margin-bottom: 8px; background: var(--panel); }

/* ---------- tab bar ---------- */
.tabbar { display: flex; gap: 6px; padding: 0 16px 10px; flex-shrink: 0; }
.tab { flex: 1; background: var(--panel); color: var(--dim); border-radius: 10px; padding: 9px 0; font-size: 14px; font-weight: 700; transition: background 0.15s ease, color 0.15s ease; }
.tab.active { background: var(--accent); color: #fff; }

.lang-select-row { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.lang-select-btn {
  background: var(--panel);
  color: var(--dim);
  border: 1px solid var(--faint);
  border-radius: 10px;
  padding: 11px 0;
  font-size: 14px;
  font-weight: 700;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.lang-select-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }

.lang-filter { display: flex; gap: 8px; padding: 0 16px 10px; flex-shrink: 0; }
.lang-filter-btn {
  flex: 1;
  background: var(--panel);
  color: var(--dim);
  border: 1px solid var(--faint);
  border-radius: 10px;
  padding: 8px 0;
  font-size: 13px;
  font-weight: 700;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease, opacity 0.15s ease;
}
.lang-filter-btn.active { background: var(--accent-soft); color: #1a0a12; border-color: var(--accent-soft); }
.lang-filter-btn:not(.active) { opacity: 0.5; }

.code-input { text-transform: uppercase; text-align: center; font-size: 22px; letter-spacing: 4px; }

.remove-other-note { text-align: center; color: var(--dim); font-size: 13px; margin-top: 6px; }

/* ---------- editor ---------- */
.editor-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 6px 16px calc(14px + var(--safe-bottom));
  min-height: 0;
}
.editor-body input[type="text"], .editor-body textarea {
  background: var(--panel);
  border: 1px solid var(--faint);
  border-radius: 12px;
  color: var(--text);
  font-family: inherit;
  font-size: 16px;
  padding: 12px 14px;
  outline: none;
}
.editor-body input:focus, .editor-body textarea:focus { border-color: var(--accent); }
.editor-body input::placeholder, .editor-body textarea::placeholder { color: var(--dim); font-weight: 400; opacity: 1; }
.editor-body textarea { flex: 1; resize: none; line-height: 1.8; min-height: 120px; }
.editor-status {
  text-align: center;
  color: var(--accent-soft);
  font-size: 14px;
  padding: 4px;
}

/* ---------- perform ---------- */
.perform-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px 4px;
  flex-shrink: 0;
}
.perform-title {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-align: center;
}
#perform-song-title {
  font-size: 15px;
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.edit-hint {
  text-align: center;
  font-size: 12px;
  color: var(--dim);
  padding: 0 0 8px;
  flex-shrink: 0;
}

.youtube-panel {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 6px 10px 8px;
  background: var(--bg);
}
/* Pinning is pure CSS (no DOM move) so the iframe never gets detached and
   reloaded — position:sticky lets it scroll normally until it reaches the
   top of #lyrics-scroll, then hold there while lyrics scroll underneath. */
.youtube-panel.pinned { position: sticky; top: 0; z-index: 5; }
.youtube-search-bar { display: flex; gap: 8px; }
.youtube-frame {
  width: 100%;
  height: 180px;
  border: none;
  border-radius: 12px;
  background: var(--panel);
}
.youtube-controls-row { display: flex; }
.youtube-revert-btn {
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--faint);
  border-radius: 10px;
  padding: 8px 12px;
  font-size: 13px;
  font-weight: 600;
}
.youtube-revert-btn:disabled { color: var(--dim); opacity: 0.4; }
.youtube-revert-btn:not(:disabled):active { background: var(--panel-2); }
.youtube-error { font-size: 12px; color: var(--accent); line-height: 1.4; }

.lyrics-scroll {
  flex: 1;
  overflow-y: auto;
  min-height: 0;
}
.lyrics-container {
  padding: 6px 18px 30vh;
  font-size: 26px;
}

.line {
  padding: 0.42em 10px;
  line-height: 2.3;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--text);
}
.line.gap { height: 1.2em; padding: 0; }

ruby { ruby-align: center; }
rt {
  font-size: 0.55em;
  font-weight: 700;
  color: var(--ruby);
  letter-spacing: 0.05em;
}

.unit {
  border-radius: 6px;
  padding: 0 1px;
  transition: background 0.15s;
}
.unit.selected {
  background: rgba(255, 77, 141, 0.32);
  box-shadow: 0 0 0 1px rgba(255, 77, 141, 0.6);
}

/* ---------- selection bar ---------- */
.selection-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 16px;
  background: var(--panel-2);
  border-top: 1px solid var(--faint);
  flex-shrink: 0;
}
#selection-count { font-size: 14px; color: var(--text); font-weight: 600; }
.selection-bar-buttons { display: flex; gap: 8px; }

/* ---------- perform controls ---------- */
.perform-controls {
  display: flex;
  gap: 8px;
  padding: 8px 10px calc(10px + var(--safe-bottom));
  flex-shrink: 0;
}
.ctl {
  background: var(--panel);
  color: var(--text);
  border-radius: 14px;
  font-size: 17px;
  font-weight: 700;
  padding: 14px 0;
  flex: 1;
}
.ctl:active { background: var(--panel-2); }
.ctl:disabled { opacity: 0.35; }
.ctl:disabled:active { background: var(--panel); }
.ctl-icon { display: flex; align-items: center; justify-content: center; color: var(--dim); }
.ctl-icon:active { color: var(--text); }

.reading-mode-row { display: flex; justify-content: center; gap: 6px; padding: 4px 16px 8px; flex-shrink: 0; }
.reading-mode-btn {
  background: var(--panel);
  color: var(--dim);
  border: 1px solid var(--faint);
  border-radius: 10px;
  width: 42px;
  height: 34px;
  font-size: 15px;
  font-weight: 700;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.reading-mode-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.sync-romaji-btn {
  background: var(--panel);
  color: var(--accent-soft);
  border: 1px solid var(--accent);
  border-radius: 10px;
  height: 34px;
  padding: 0 12px;
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
}
.sync-romaji-btn:active { background: var(--accent); color: #fff; }

/* ---------- modal ---------- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
  padding: 20px;
  opacity: 0;
  transition: opacity 0.18s ease;
}
.modal-backdrop.open { opacity: 1; }
.modal {
  background: var(--panel-2);
  border-radius: 18px;
  padding: 22px;
  width: 100%;
  max-width: 360px;
  transform: scale(0.94) translateY(8px);
  transition: transform 0.18s ease;
}
.modal-backdrop.open .modal { transform: scale(1) translateY(0); }
.modal-word {
  font-size: 30px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 14px;
}
.modal-label { display: block; font-size: 13px; color: var(--dim); margin-bottom: 6px; }
.modal input[type="text"] {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--faint);
  border-radius: 10px;
  color: var(--text);
  font-family: inherit;
  font-size: 20px;
  text-align: center;
  padding: 10px;
  outline: none;
}
.modal input[type="text"]:focus { border-color: var(--accent); }
.modal input[type="text"]::placeholder { color: var(--dim); font-weight: 400; opacity: 1; }
.modal-buttons { display: flex; gap: 8px; justify-content: flex-end; margin-top: 18px; }

.share-modal-title { font-size: 19px; }
.modal-desc { text-align: center; color: var(--dim); font-size: 13px; line-height: 1.5; margin: -6px 0 16px; }
.gen-code-label-2 { margin-top: 12px; }

.gen-code-row { display: flex; align-items: stretch; gap: 8px; }
.gen-code-display {
  flex: 1;
  text-align: center;
  font-size: 32px;
  font-weight: 800;
  letter-spacing: 6px;
  color: var(--accent-soft);
  background: var(--bg);
  border: 1px solid var(--faint);
  border-radius: 10px;
  padding: 14px;
}
.gen-code-message {
  flex: 1;
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--faint);
  border-radius: 10px;
  color: var(--text);
  font-family: inherit;
  font-size: 13px;
  line-height: 1.6;
  padding: 10px;
  resize: none;
  height: 110px;
}
.gen-code-copy-btn {
  background: var(--panel);
  color: var(--dim);
  border-radius: 10px;
  padding: 0 14px;
  font-size: 18px;
  flex-shrink: 0;
}
.gen-code-copy-btn:active { color: var(--text); background: var(--faint); }

.reading-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
  justify-content: center;
  transform-origin: top center;
  transform: scaleY(0.85) translateY(-4px);
  opacity: 0;
  transition: opacity 0.15s ease, transform 0.15s ease;
}
.reading-chips.open {
  transform: scaleY(1) translateY(0);
  opacity: 1;
}
.reading-chip {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--faint);
  border-radius: 20px;
  padding: 6px 14px;
  font-size: 15px;
}
.reading-chip.active { background: var(--accent); border-color: var(--accent); color: #fff; }