/* ============================================================
   METRONOM PRO — Stylesheet
   ============================================================ */

/* --- CSS Variables --- */
:root {
  --bg-body: #0b0b14;
  --bg-primary: #0f0f1a;
  --bg-secondary: #161627;
  --bg-card: #1c1c35;
  --bg-card-hover: #24243f;
  --bg-input: #12122a;
  --accent: #e94560;
  --accent-dim: #c73a52;
  --accent-glow: rgba(233, 69, 96, 0.35);
  --accent-glow-strong: rgba(233, 69, 96, 0.6);
  --secondary: #0f3460;
  --secondary-light: #1a5276;
  --text-primary: #e8e8f0;
  --text-secondary: #8888a8;
  --text-muted: #555570;
  --border: #2a2a45;
  --border-light: #3a3a55;
  --success: #50fa7b;
  --warning: #ffd93d;
  --danger: #ff5555;
  --group-accent: #ffa726;
  --beat-color: #42a5f5;
  --subdivision-color: #666688;
  --radius: 10px;
  --radius-sm: 6px;
  --transition: 0.2s ease;
  --font-mono: 'JetBrains Mono', 'Consolas', monospace;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

html {
  font-size: 16px;
}

body {
  background: var(--bg-body);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  padding: 1rem;
}

/* --- App Container --- */
#app {
  width: 100%;
  max-width: 680px;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* --- Header --- */
header {
  text-align: center;
  padding: 1rem 0 0.5rem;
}

header h1 {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--text-primary);
}

header .accent {
  color: var(--accent);
}

/* ============================================================
   DISPLAY PANEL
   ============================================================ */
#display-panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

#display-panel::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--secondary-light), var(--accent));
  opacity: 0.6;
}

#display-bpm {
  margin-bottom: 1rem;
}

#bpm-value {
  font-family: var(--font-mono);
  font-size: 4rem;
  font-weight: 700;
  line-height: 1;
  color: var(--text-primary);
  transition: color 0.15s;
}

#bpm-label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 3px;
  margin-top: 0.25rem;
}

#display-info {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-bottom: 0.75rem;
}

.info-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.info-label {
  font-size: 0.65rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1.5px;
}

.info-value {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-secondary);
}

#display-time {
  margin-top: 0.25rem;
}

#elapsed-time {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  color: var(--text-muted);
}

/* Playing state animations */
#display-panel.playing #bpm-value {
  color: var(--accent);
}

#display-panel.playing .info-value {
  color: var(--text-primary);
}

#display-panel.playing #elapsed-time {
  color: var(--text-secondary);
}

/* ============================================================
   BEAT VISUALIZER
   ============================================================ */
#beat-visualizer {
  padding: 0.75rem 1rem;
}

#beat-dots {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  min-height: 40px;
}

.beat-dot {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 2px solid var(--border);
  transition: all 0.08s ease;
  position: relative;
}

.beat-dot.accent-dot {
  border-color: var(--accent-dim);
}

.beat-dot.group-dot {
  border-color: var(--group-accent);
}

/* Grouping separator */
.beat-group-sep {
  width: 2px;
  height: 20px;
  background: var(--border);
  margin: 0 0.25rem;
  border-radius: 1px;
}

/* Active states */
.beat-dot.active {
  background: var(--beat-color);
  border-color: var(--beat-color);
  box-shadow: 0 0 12px rgba(66, 165, 245, 0.5);
  transform: scale(1.15);
}

.beat-dot.accent-dot.active {
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 16px var(--accent-glow-strong);
  transform: scale(1.25);
}

.beat-dot.group-dot.active {
  background: var(--group-accent);
  border-color: var(--group-accent);
  box-shadow: 0 0 14px rgba(255, 167, 38, 0.5);
  transform: scale(1.2);
}

/* ============================================================
   SEQUENCE EDITOR
   ============================================================ */
#sequence-editor {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
}

.section-title h2 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

/* Sequence Table */
#sequence-table {
  width: 100%;
}

.seq-header {
  display: grid;
  grid-template-columns: 30px 1fr 1fr 1fr 0.8fr 40px;
  gap: 0.5rem;
  padding: 0.4rem 0.5rem;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}

.seq-row {
  display: grid;
  grid-template-columns: 30px 1fr 1fr 1fr 0.8fr 40px;
  gap: 0.5rem;
  padding: 0.5rem;
  align-items: center;
  border-bottom: 1px solid var(--bg-primary);
  transition: background var(--transition);
  border-radius: var(--radius-sm);
}

.seq-row:hover {
  background: var(--bg-card-hover);
}

.seq-row.active-step {
  background: rgba(233, 69, 96, 0.1);
  border-left: 3px solid var(--accent);
}

.seq-row .row-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: center;
}

.seq-row input[type="number"],
.seq-row select {
  width: 100%;
  padding: 0.4rem 0.5rem;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  outline: none;
  transition: border-color var(--transition);
}

.seq-row input[type="number"]:focus,
.seq-row select:focus {
  border-color: var(--accent);
}

.seq-row select {
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%238888a8'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.5rem center;
  padding-right: 1.5rem;
}

.seq-row select option {
  background: var(--bg-card);
  color: var(--text-primary);
}

/* Remove spinner arrows on number inputs */
.seq-row input[type="number"]::-webkit-inner-spin-button,
.seq-row input[type="number"]::-webkit-outer-spin-button {
  opacity: 0.5;
}

.btn-delete-row {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1.1rem;
  padding: 0.25rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-delete-row:hover {
  color: var(--danger);
  background: rgba(255, 85, 85, 0.1);
}

/* Infinite repeat indicator */
.repeat-infinite {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.repeat-infinite .infinity-badge {
  font-size: 0.65rem;
  color: var(--warning);
  background: rgba(255, 217, 61, 0.1);
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
}

/* Add Step Button */
#btn-add-step {
  width: 100%;
  margin-top: 0.75rem;
  padding: 0.6rem;
  font-size: 0.85rem;
}

/* ============================================================
   SETTINGS PANEL
   ============================================================ */
#settings-panel {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}

.settings-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.settings-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Toggle Switch */
.toggle-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--text-secondary);
  user-select: none;
}

.toggle-label input[type="checkbox"] {
  display: none;
}

.toggle-switch {
  width: 36px;
  height: 20px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 10px;
  position: relative;
  transition: all var(--transition);
  flex-shrink: 0;
}

.toggle-switch::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 14px;
  height: 14px;
  background: var(--text-muted);
  border-radius: 50%;
  transition: all var(--transition);
}

.toggle-label input:checked + .toggle-switch {
  background: var(--accent);
  border-color: var(--accent);
}

.toggle-label input:checked + .toggle-switch::after {
  left: 18px;
  background: white;
}

/* Radio buttons */
.radio-group {
  display: flex;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.radio-label {
  cursor: pointer;
}

.radio-label input[type="radio"] {
  display: none;
}

.radio-btn {
  display: block;
  padding: 0.3rem 0.7rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
  background: var(--bg-input);
  border-right: 1px solid var(--border);
  transition: all var(--transition);
  user-select: none;
}

.radio-label:last-child .radio-btn {
  border-right: none;
}

.radio-label input:checked + .radio-btn {
  background: var(--accent);
  color: white;
}

/* Timed input */
.timed-input {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.timed-input input {
  width: 55px;
  padding: 0.3rem 0.4rem;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-align: center;
  outline: none;
}

.timed-input input:focus {
  border-color: var(--accent);
}

.timed-input input:disabled {
  opacity: 0.4;
}

/* ============================================================
   TRANSPORT CONTROLS
   ============================================================ */
#transport {
  display: flex;
  gap: 0.75rem;
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  padding: 0.7rem 1.5rem;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  user-select: none;
}

.btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.btn-play {
  flex: 1;
  background: var(--accent);
  color: white;
  font-size: 1.1rem;
  padding: 1rem;
  letter-spacing: 2px;
}

.btn-play:hover:not(:disabled) {
  background: var(--accent-dim);
  box-shadow: 0 0 20px var(--accent-glow);
}

.btn-play.playing {
  background: var(--success);
  color: #111;
  animation: pulse-glow 1s ease infinite;
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 10px rgba(80, 250, 123, 0.3); }
  50% { box-shadow: 0 0 25px rgba(80, 250, 123, 0.5); }
}

.btn-stop {
  flex: 0.5;
  background: var(--bg-card);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  font-size: 1.1rem;
  padding: 1rem;
  letter-spacing: 2px;
}

.btn-stop:hover:not(:disabled) {
  background: var(--danger);
  color: white;
  border-color: var(--danger);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-secondary);
  border: 1px dashed var(--border);
}

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(233, 69, 96, 0.05);
}

.btn-outline {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.btn-outline:hover {
  border-color: var(--text-secondary);
  color: var(--text-primary);
}

.btn-small {
  padding: 0.4rem 0.75rem;
  font-size: 0.8rem;
}

.btn-primary {
  background: var(--accent);
  color: white;
}

.btn-primary:hover {
  background: var(--accent-dim);
}

.btn-danger:hover {
  border-color: var(--danger) !important;
  color: var(--danger) !important;
}

/* ============================================================
   EXTRAS PANEL
   ============================================================ */
#extras-panel {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  flex-wrap: wrap;
}

#btn-tap-tempo {
  font-family: var(--font-mono);
  letter-spacing: 1px;
  font-size: 0.8rem;
  padding: 0.5rem 1rem;
}

#btn-tap-tempo.tapping {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
}

#preset-controls {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  margin-left: auto;
}

#preset-select {
  padding: 0.4rem 0.5rem;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.8rem;
  outline: none;
  cursor: pointer;
  min-width: 140px;
}

#preset-select option {
  background: var(--bg-card);
}

/* ============================================================
   MODAL
   ============================================================ */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  backdrop-filter: blur(4px);
}

.modal-overlay.hidden {
  display: none;
}

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  width: 90%;
  max-width: 360px;
}

.modal h3 {
  margin-bottom: 1rem;
  font-size: 1rem;
  color: var(--text-primary);
}

.modal input[type="text"] {
  width: 100%;
  padding: 0.6rem 0.75rem;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.9rem;
  outline: none;
  margin-bottom: 1rem;
}

.modal input[type="text"]:focus {
  border-color: var(--accent);
}

.modal-buttons {
  display: flex;
  gap: 0.5rem;
  justify-content: flex-end;
}

/* ============================================================
   FOOTER
   ============================================================ */
footer {
  text-align: center;
  padding: 0.5rem 0 1rem;
  font-size: 0.75rem;
  color: var(--text-muted);
}

footer kbd {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 0.1rem 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
}

/* ============================================================
   LEAD-IN OVERLAY
   ============================================================ */
#lead-in-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 900;
  backdrop-filter: blur(2px);
}

#lead-in-overlay.hidden {
  display: none;
}

#lead-in-count {
  font-family: var(--font-mono);
  font-size: 8rem;
  font-weight: 700;
  color: var(--accent);
  text-shadow: 0 0 40px var(--accent-glow-strong);
  animation: count-pop 0.3s ease;
}

@keyframes count-pop {
  0% { transform: scale(1.4); opacity: 0.5; }
  100% { transform: scale(1); opacity: 1; }
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 600px) {
  html {
    font-size: 14px;
  }

  .seq-header,
  .seq-row {
    grid-template-columns: 24px 1fr 1fr 1fr 0.7fr 32px;
    gap: 0.3rem;
    padding: 0.4rem 0.3rem;
  }

  .seq-row input[type="number"],
  .seq-row select {
    padding: 0.35rem 0.3rem;
    font-size: 0.8rem;
  }

  #display-info {
    gap: 0.75rem;
  }

  #bpm-value {
    font-size: 3.2rem;
  }

  #settings-panel {
    flex-direction: column;
    align-items: flex-start;
  }

  #extras-panel {
    flex-direction: column;
    align-items: stretch;
  }

  #preset-controls {
    margin-left: 0;
  }

  #transport {
    flex-direction: column;
  }

  .btn-play, .btn-stop {
    flex: none;
  }
}

/* ============================================================
   SCROLLBAR
   ============================================================ */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* ============================================================
   SELECTION
   ============================================================ */
::selection {
  background: var(--accent);
  color: white;
}