:root {
  --bg: #0f172a;
  --card: #111827;
  --card-2: #1f2937;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --primary: #22c55e;
  --primary-2: #16a34a;
  --danger: #ef4444;
  --border: #374151;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(145deg, #0b1220, #111827 60%, #0f172a);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
}

.app {
  max-width: 1100px;
}

.app-footer {
  margin-top: 16px;
  padding: 8px 4px 2px;
  text-align: right;
}

.app-header h1 {
  margin-bottom: 6px;
}

.subtitle {
  margin-top: 0;
  color: var(--muted);
}

.header-actions {
  margin-top: 8px;
  justify-content: flex-end;
}

.language-switch {
  display: inline-flex;
  gap: 6px;
  padding: 4px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(11, 18, 32, 0.7);
}

.lang-btn {
  min-width: 46px;
  padding: 7px 10px;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.lang-btn.active {
  background: var(--primary);
  border-color: rgba(34, 197, 94, 0.45);
}

.lang-btn.active:hover {
  background: var(--primary-2);
}

.card {
  background: rgba(17, 24, 39, 0.92);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
  box-shadow: var(--shadow);
  height: 100%;
}

h2 {
  margin-top: 0;
  font-size: 1.05rem;
}

.block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.block-order-controls {
  display: flex;
  gap: 6px;
}

.block-order-btn {
  min-width: 34px;
  min-height: 34px;
  padding: 6px 8px;
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1;
}

.block-order-btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.reorderable-block.collapsed > :not(.block-header) {
  display: none !important;
}

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin: 10px 0;
}

.mode-row {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.controls-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px;
  margin: 10px 0;
}

label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  color: var(--muted);
  font-size: 0.9rem;
}

textarea,
input[type="number"],
input[type="text"],
select {
  width: 100%;
  background: var(--card-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px;
}

textarea {
  resize: vertical;
}

#lyricsInput {
  min-height: 220px;
}

input[type="file"] {
  display: none;
}

.file-label,
button {
  border: 1px solid transparent;
  border-radius: 10px;
  padding: 9px 12px;
  font-size: 0.92rem;
  cursor: pointer;
  color: white;
  background: var(--primary);
  transition: 0.2s ease;
}

button:focus-visible,
.file-label:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

button:hover,
.file-label:hover {
  transform: translateY(-1px);
  background: var(--primary-2);
}

button.secondary {
  background: #334155;
}

button.secondary:hover {
  background: #475569;
}

button.danger {
  background: var(--danger);
}

button.danger:hover {
  background: #dc2626;
}

.badge {
  background: #0b1220;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 5px 10px;
  color: var(--muted);
  font-size: 0.82rem;
}

.meta {
  display: grid;
  gap: 4px;
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 10px;
}

.hint {
  color: var(--muted);
  margin: 8px 0 0;
  font-size: 0.88rem;
}

.karaoke-card {
  min-height: 82vh;
}

#playlistTitleInput {
  min-width: 230px;
  max-width: 420px;
}

#playlistNameInput,
#playlistSelect {
  color: var(--text);
  background: var(--card-2);
}

#playlistNameInput::placeholder {
  color: #cbd5e1;
  opacity: 1;
}

#playlistSelect option {
  color: var(--text);
  background: #111827;
}

.playlist-view {
  display: grid;
  gap: 10px;
  margin-top: 8px;
}

.playlist-item {
  display: grid;
  gap: 8px;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: rgba(11, 18, 32, 0.55);
}

.playlist-item-main {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: center;
}

.playlist-item-title {
  font-weight: 600;
  color: #f8fafc;
}

.playlist-item-meta {
  color: var(--muted);
  font-size: 0.82rem;
}

.playlist-item-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.remote-category {
  display: grid;
  gap: 8px;
}

.remote-category-title {
  margin: 2px 0 0;
  font-size: 0.95rem;
  color: #cbd5e1;
  border-left: 3px solid var(--primary);
  padding-left: 8px;
}

.karaoke-header {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.karaoke-controls-inline {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.karaoke-view {
  min-height: 70vh;
  max-height: 74vh;
  overflow-y: auto;
  display: grid;
  align-content: start;
  gap: 18px;
  scroll-behavior: smooth;
  padding-top: 8px;
  padding-bottom: 16px;
}

.paragraph {
  opacity: 0.22;
  transform: translateY(6px) scale(0.99);
  transition: opacity 0.35s ease, transform 0.35s ease;
  color: #cbd5e1;
  line-height: 1.45;
  font-size: clamp(1.15rem, 2.8vw, 2.45rem);
  padding: 16px 18px;
  border-radius: 12px;
}

.paragraph.active {
  opacity: 1;
  transform: translateY(0) scale(1);
  background: rgba(34, 197, 94, 0.12);
  border: 1px solid rgba(34, 197, 94, 0.35);
  color: #f8fafc;
  font-weight: 700;
}

.empty {
  color: var(--muted);
  text-align: center;
}

.toast {
  position: fixed;
  bottom: 16px;
  right: 16px;
  background: #0b1220;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 10px;
  max-width: 360px;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.2s, transform 0.2s;
  pointer-events: none;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

.tools-modal {
  position: fixed;
  inset: 0;
  z-index: 1100;
  display: grid;
  place-items: center;
  padding: 16px;
}

.tools-modal[hidden] {
  display: none !important;
}

.tools-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(2, 6, 23, 0.72);
}

.tools-modal-panel {
  position: relative;
  z-index: 1;
  width: min(980px, 100%);
  max-height: calc(100vh - 32px);
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(11, 18, 32, 0.98);
  box-shadow: var(--shadow);
  padding: 14px;
  display: grid;
  gap: 12px;
}

.tools-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.tools-modal-header h2 {
  margin: 0;
}

.tools-modal-card {
  margin: 0;
}

.fullscreen-karaoke {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(2, 6, 23, 0.97);
  display: grid;
  place-items: center;
  padding: 24px;
}

.fullscreen-karaoke[hidden] {
  display: none !important;
}

.fullscreen-paragraph {
  width: min(1100px, 88vw);
  text-align: center;
  color: #f8fafc;
  text-wrap: balance;
  display: grid;
  gap: clamp(10px, 2vh, 24px);
}

.fullscreen-current {
  font-size: clamp(2rem, 4.8vw, 4.2rem);
  line-height: 1.28;
  font-weight: 700;
}

.fullscreen-next {
  font-size: clamp(1.05rem, 2.2vw, 1.9rem);
  line-height: 1.35;
  font-weight: 500;
  color: rgba(248, 250, 252, 0.72);
  max-width: min(900px, 80vw);
  margin: 0 auto;
  display: -webkit-box;
  line-clamp: 2;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.fullscreen-controls {
  position: fixed;
  right: 20px;
  bottom: 20px;
  display: flex;
  gap: 8px;
  padding: 8px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(15, 23, 42, 0.92);
}

.close-fullscreen-btn {
  position: fixed;
  top: 20px;
  right: 20px;
}

kbd {
  background: #1e293b;
  border: 1px solid #334155;
  border-bottom-width: 2px;
  padding: 2px 6px;
  border-radius: 6px;
  color: #e2e8f0;
  font-size: 0.8rem;
}

@media (max-width: 768px) {
  .app {
    padding-left: 10px;
    padding-right: 10px;
  }

  .card {
    padding: 12px;
  }

  .action-row {
    gap: 8px;
    margin: 8px 0;
    align-items: stretch;
  }

  .block-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .block-order-controls {
    width: auto;
  }

  .block-order-btn {
    width: auto;
    min-width: 40px;
    min-height: 40px;
  }

  audio {
    width: 100%;
  }

  .subtitle {
    margin-bottom: 8px;
  }

  button,
  .file-label {
    padding: 7px 10px;
    font-size: 0.86rem;
    min-height: 44px;
  }

  .badge {
    padding: 4px 8px;
    font-size: 0.76rem;
  }

  input[type="number"],
  input[type="text"],
  select,
  textarea {
    padding: 8px;
    font-size: 0.92rem;
  }

  input[type="number"],
  input[type="text"],
  select {
    min-height: 44px;
  }

  .controls-grid {
    grid-template-columns: 1fr;
  }

  .mode-row {
    gap: 8px;
  }

  .mode-row button {
    width: 100%;
  }

  .mode-row .badge {
    order: 99;
    width: 100%;
    justify-content: center;
    display: inline-flex;
  }

  .action-row button,
  .action-row .file-label {
    width: 100%;
  }

  .header-actions {
    justify-content: flex-start;
  }

  .header-actions #openToolsModalBtn {
    width: auto;
  }

  .header-actions .language-switch {
    width: auto;
  }

  .header-actions .language-switch .lang-btn {
    width: auto;
    flex: 0 0 auto;
    min-height: 40px;
  }

  .action-row .badge {
    order: 99;
    width: fit-content;
    display: inline-flex;
    align-items: center;
  }

  .karaoke-header {
    justify-content: flex-start;
    flex-wrap: wrap;
  }

  .karaoke-controls-inline {
    width: 100%;
  }

  .karaoke-controls-inline button {
    flex: 1 1 120px;
  }

  .karaoke-card {
    min-height: 72vh;
  }

  .karaoke-view {
    min-height: 58vh;
    max-height: 62vh;
    gap: 14px;
  }

  .paragraph {
    font-size: clamp(1.05rem, 5.1vw, 1.8rem);
    padding: 12px 14px;
  }

  #progressIndicator {
    order: 99;
    width: 100%;
    justify-content: center;
  }

  #lyricsInput {
    min-height: 150px;
  }
}