:root {
  --color-bg: #0d0d1a;
  --color-surface: #1a1a2e;
  --color-surface-hover: #22223a;
  --color-border: #2a2a44;
  --color-text: #e0e0e0;
  --color-text-dim: #888;
  --color-accent: #4fc3f7;
  --color-record: #ff1744;
  --color-record-glow: rgba(255, 23, 68, 0.3);
  --color-play: #4caf50;
  --color-stop: #ff9800;
  --color-mute: #9e9e9e;
  --color-solo: #ffc107;
  --color-clear: #78909c;
  --color-delete: #ef5350;
  --radius: 6px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100vh;
  overflow-x: hidden;
}

#app {
  max-width: 960px;
  margin: 0 auto;
  padding: 16px;
}

/* Header */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 16px;
  gap: 12px;
  flex-wrap: wrap;
}

.app-header-left {
  display: flex;
  align-items: center;
  gap: 16px;
  flex: 1;
  min-width: 0;
}

.app-header-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.app-title {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 4px;
  color: var(--color-accent);
  white-space: nowrap;
}

/* Project title */
.project-title-area {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.project-title-input {
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius);
  color: var(--color-text);
  padding: 4px 8px;
  min-width: 120px;
  max-width: 300px;
  transition: border-color 0.15s, background 0.15s;
}

.project-title-input:hover {
  border-color: var(--color-border);
}

.project-title-input:focus {
  outline: none;
  border-color: var(--color-accent);
  background: var(--color-surface);
}

/* Save indicator */
.save-indicator {
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 3px;
  white-space: nowrap;
}

.save-saving {
  color: var(--color-accent);
}

.save-saved {
  color: var(--color-play);
}

.save-error {
  color: var(--color-record);
}

.save-unsaved {
  color: var(--color-solo);
}

/* Projects button */
.btn-projects {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.btn-projects:hover {
  background: rgba(79, 195, 247, 0.1);
}

/* Auth UI */
.auth-ui {
  display: flex;
  align-items: center;
}

.btn-auth-signin {
  color: var(--color-text);
  border-color: var(--color-border);
  font-size: 12px;
  padding: 6px 12px;
  white-space: nowrap;
}

.btn-auth-signin:hover {
  border-color: var(--color-accent);
  background: rgba(79, 195, 247, 0.1);
}

.auth-user {
  display: flex;
  align-items: center;
  gap: 8px;
}

.auth-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
}

.auth-name {
  font-size: 12px;
  color: var(--color-text-dim);
  max-width: 100px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.btn-auth-signout {
  font-size: 11px;
  padding: 4px 8px;
  color: var(--color-text-dim);
  border-color: var(--color-border);
}

.btn-auth-signout:hover {
  color: var(--color-record);
  border-color: var(--color-record);
}

/* Buttons */
.btn {
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
  padding: 8px 14px;
  transition: background 0.15s, border-color 0.15s, box-shadow 0.15s;
  user-select: none;
}

.btn:hover {
  background: var(--color-surface-hover);
}

.btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.btn-add-track {
  color: var(--color-accent);
  border-color: var(--color-accent);
  width: 100%;
  margin-top: 8px;
  padding: 10px;
  border-style: dashed;
}

.btn-add-track:hover {
  background: rgba(79, 195, 247, 0.1);
}

/* Transport */
.transport {
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 14px 16px;
  margin-bottom: 16px;
  border: 1px solid var(--color-border);
}

.transport-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 12px;
}

.btn-play-all {
  color: var(--color-play);
  border-color: var(--color-play);
}

.btn-play-all:hover {
  background: rgba(76, 175, 80, 0.1);
}

.btn-stop-all {
  color: var(--color-stop);
  border-color: var(--color-stop);
}

.btn-stop-all:hover {
  background: rgba(255, 152, 0, 0.1);
}

.btn-clear-all {
  color: var(--color-delete);
  border-color: var(--color-delete);
}

.btn-clear-all:hover {
  background: rgba(239, 83, 80, 0.1);
}

.transport-spacer {
  flex: 1;
}

.btn-download {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.btn-download:hover {
  background: rgba(79, 195, 247, 0.1);
}

.btn-share {
  color: var(--color-solo);
  border-color: var(--color-solo);
}

.btn-share:hover {
  background: rgba(255, 193, 7, 0.1);
}

/* Download dropdown */
.transport-dropdown {
  position: relative;
}

.transport-dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 4px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  z-index: 100;
  min-width: 180px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.4);
}

.transport-dropdown-menu.open {
  display: flex;
  flex-direction: column;
}

.transport-dropdown-menu .dropdown-item {
  border: none;
  border-radius: 0;
  text-align: left;
  padding: 10px 14px;
  font-size: 13px;
  color: var(--color-text);
  background: transparent;
}

.transport-dropdown-menu .dropdown-item:hover {
  background: var(--color-surface-hover);
}

.transport-dropdown-menu .dropdown-item + .dropdown-item {
  border-top: 1px solid var(--color-border);
}

.transport-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.loop-position-bar {
  flex: 1;
  height: 8px;
  background: var(--color-bg);
  border-radius: 4px;
  overflow: hidden;
}

.loop-position-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--color-accent), #81d4fa);
  border-radius: 4px;
  transition: width 0.05s linear;
}

.loop-duration {
  font-size: 13px;
  color: var(--color-text-dim);
  min-width: 40px;
  text-align: right;
}

/* Track list */
#track-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* Track row */
.track-row {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 12px 16px;
  display: grid;
  grid-template-columns: 80px 1fr;
  grid-template-rows: auto auto;
  gap: 8px 12px;
  align-items: center;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.track-row[data-state="recording"] {
  border-color: var(--color-record);
  box-shadow: 0 0 12px var(--color-record-glow);
  animation: pulse-border 1s infinite alternate;
}

.track-row[data-state="playing"] {
  border-color: var(--color-play);
}

@keyframes pulse-border {
  from { box-shadow: 0 0 8px var(--color-record-glow); }
  to { box-shadow: 0 0 20px var(--color-record-glow); }
}

.track-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-dim);
  grid-row: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: 4px;
}

.track-multiplier-badge {
  font-size: 11px;
  font-weight: 700;
  color: var(--color-accent);
  background: rgba(79, 195, 247, 0.15);
  border: 1px solid var(--color-accent);
  border-radius: 3px;
  padding: 1px 6px;
}

.track-controls {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

/* Track-specific buttons */
.btn-rec {
  color: var(--color-record);
  border-color: var(--color-record);
  min-width: 56px;
}

.btn-rec:hover {
  background: rgba(255, 23, 68, 0.1);
}

.btn-rec.recording {
  background: var(--color-record);
  color: white;
  animation: pulse-bg 0.8s infinite alternate;
}

@keyframes pulse-bg {
  from { opacity: 0.8; }
  to { opacity: 1; }
}

.btn-play {
  color: var(--color-play);
  border-color: var(--color-play);
  min-width: 40px;
}

.btn-play:hover:not(:disabled) {
  background: rgba(76, 175, 80, 0.1);
}

.btn-mute {
  min-width: 50px;
}

.btn-mute.active {
  background: var(--color-mute);
  color: var(--color-bg);
}

.btn-solo {
  min-width: 50px;
}

.btn-solo.active {
  background: var(--color-solo);
  color: var(--color-bg);
}

.btn-clear {
  color: var(--color-clear);
  border-color: var(--color-clear);
  font-size: 11px;
}

.btn-delete {
  color: var(--color-delete);
  border-color: var(--color-delete);
}

.btn-delete:hover {
  background: rgba(239, 83, 80, 0.15);
}

/* Volume slider */
.volume-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 80px;
  height: 6px;
  background: var(--color-bg);
  border-radius: 3px;
  outline: none;
  cursor: pointer;
}

.volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-accent);
  cursor: pointer;
  border: none;
}

.volume-slider::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-accent);
  cursor: pointer;
  border: none;
}

/* Waveform */
.track-waveform {
  grid-column: 2;
  height: 48px;
  background: var(--color-bg);
  border-radius: 4px;
  overflow: hidden;
  position: relative;
}

.track-waveform .btn-delete {
  position: absolute;
  top: 50%;
  right: 6px;
  transform: translateY(-50%);
  opacity: 0;
  transition: opacity 0.15s;
  z-index: 1;
  padding: 4px 8px;
  font-size: 14px;
  background: rgba(13, 13, 26, 0.85);
}

.track-row:hover .track-waveform .btn-delete {
  opacity: 1;
}

.waveform-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

/* FX button */
.btn-fx {
  color: var(--color-accent);
  border-color: var(--color-accent);
  min-width: 36px;
}

.btn-fx.active {
  background: var(--color-accent);
  color: var(--color-bg);
}

/* Effects panel */
.track-effects-panel {
  grid-column: 1 / -1;
  display: none;
  padding: 10px 0 4px;
  border-top: 1px solid var(--color-border);
  margin-top: 4px;
}

.track-effects-panel.open {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.fx-block {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 8px 12px;
  min-width: 140px;
  flex: 1;
}

.fx-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}

.fx-block-title {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-text-dim);
}

.fx-toggle {
  width: 36px;
  height: 20px;
  border-radius: 10px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  cursor: pointer;
  transition: background 0.15s;
  position: relative;
}

.fx-toggle::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-text-dim);
  transition: transform 0.15s, background 0.15s;
}

.fx-toggle.active {
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.fx-toggle.active::after {
  transform: translateX(16px);
  background: var(--color-bg);
}

.fx-params {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.fx-param {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.fx-param label {
  font-size: 10px;
  color: var(--color-text-dim);
}

.fx-param input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 70px;
  height: 4px;
  background: var(--color-surface);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}

.fx-param input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-accent);
  cursor: pointer;
  border: none;
}

.fx-param input[type="range"]::-moz-range-thumb {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-accent);
  cursor: pointer;
  border: none;
}

.fx-select {
  font-family: inherit;
  font-size: 11px;
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: 3px;
  padding: 3px 6px;
  cursor: pointer;
  outline: none;
}

.fx-select:focus {
  border-color: var(--color-accent);
}

/* Modal */
.modal-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: 1000;
  padding: 20px;
}

.modal {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  width: 100%;
  max-width: 520px;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--color-border);
}

.modal-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
}

.btn-modal-close {
  font-size: 18px;
  background: transparent;
  border: none;
  color: var(--color-text-dim);
  cursor: pointer;
  padding: 4px 8px;
}

.btn-modal-close:hover {
  color: var(--color-text);
}

.modal-body {
  padding: 16px 20px;
  overflow-y: auto;
}

/* Project list */
.btn-new-project {
  width: 100%;
  color: var(--color-accent);
  border-color: var(--color-accent);
  border-style: dashed;
  margin-bottom: 12px;
}

.btn-new-project:hover {
  background: rgba(79, 195, 247, 0.1);
}

.project-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.project-list-empty {
  text-align: center;
  color: var(--color-text-dim);
  padding: 24px 0;
  font-size: 13px;
}

.project-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  gap: 10px;
}

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

.project-item-info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.project-item-title {
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 3px;
  color: var(--color-text);
  padding: 2px 4px;
  width: 100%;
}

.project-item-title:hover {
  border-color: var(--color-border);
}

.project-item-title:focus {
  outline: none;
  border-color: var(--color-accent);
  background: var(--color-surface);
}

.project-item-meta {
  font-size: 11px;
  color: var(--color-text-dim);
  padding-left: 4px;
}

.project-item-actions {
  display: flex;
  gap: 6px;
}

.btn-project-open {
  color: var(--color-accent);
  border-color: var(--color-accent);
  font-size: 11px;
  padding: 4px 10px;
}

.btn-project-open:hover {
  background: rgba(79, 195, 247, 0.1);
}

.btn-project-delete {
  color: var(--color-delete);
  border-color: var(--color-delete);
  font-size: 14px;
  padding: 2px 8px;
}

.btn-project-delete:hover {
  background: rgba(239, 83, 80, 0.15);
}

/* Share dialog */
.share-toggle-row {
  margin-bottom: 16px;
}

.share-toggle-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
}

.share-hint {
  font-size: 11px;
  color: var(--color-text-dim);
  margin-top: 4px;
}

.share-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-dim);
  margin-bottom: 6px;
  display: block;
}

.share-url-row,
.share-preview-row {
  margin-bottom: 16px;
}

.share-url-copy {
  display: flex;
  gap: 6px;
}

.share-url-input {
  font-family: inherit;
  font-size: 12px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text);
  padding: 8px 10px;
  flex: 1;
  outline: none;
}

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

.btn-copy-link {
  color: var(--color-accent);
  border-color: var(--color-accent);
  font-size: 12px;
  padding: 6px 12px;
  white-space: nowrap;
}

.btn-copy-link:hover {
  background: rgba(79, 195, 247, 0.1);
}

.share-copy-feedback {
  font-size: 11px;
  color: var(--color-play);
  margin-top: 4px;
  display: block;
}

.share-preview-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.btn-generate-preview {
  color: var(--color-accent);
  border-color: var(--color-accent);
  font-size: 12px;
  padding: 6px 12px;
}

.btn-generate-preview:hover {
  background: rgba(79, 195, 247, 0.1);
}

.btn-generate-preview:disabled {
  opacity: 0.5;
}

.share-preview-status {
  font-size: 11px;
  color: var(--color-text-dim);
}

.share-preview-player {
  width: 100%;
  height: 36px;
  border-radius: var(--radius);
}

/* Footer */
.app-footer {
  margin-top: 24px;
  padding: 12px 0;
  border-top: 1px solid var(--color-border);
}

.hint {
  font-size: 12px;
  color: var(--color-text-dim);
}

/* Offline indicator */
body.offline::after {
  content: 'Offline';
  position: fixed;
  bottom: 12px;
  right: 12px;
  background: var(--color-record);
  color: white;
  font-size: 11px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 4px;
  z-index: 2000;
  pointer-events: none;
}

/* Responsive */
@media (max-width: 640px) {
  #app {
    padding: 10px;
  }

  .app-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .app-header-left {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    width: 100%;
  }

  .app-header-right {
    width: 100%;
    justify-content: flex-end;
  }

  .app-title {
    font-size: 22px;
    letter-spacing: 2px;
  }

  .project-title-input {
    font-size: 13px;
    max-width: 100%;
  }

  .auth-name {
    display: none;
  }

  .track-row {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto auto;
    padding: 10px 12px;
  }

  .track-effects-panel.open {
    flex-direction: column;
  }

  .fx-block {
    min-width: unset;
  }

  .track-label {
    grid-row: auto;
    font-size: 12px;
  }

  .track-controls {
    gap: 4px;
  }

  .btn {
    padding: 6px 10px;
    font-size: 12px;
  }

  .volume-slider {
    width: 60px;
  }

  .track-waveform {
    grid-column: 1;
    height: 40px;
  }

  .transport-controls {
    flex-wrap: wrap;
  }

  .btn-transport {
    font-size: 12px;
    padding: 6px 10px;
  }
}

/* ============================================================
   View System: Landing, Dashboard, Editor
   ============================================================ */

/* View container overrides (use #app prefix for specificity) */
#app.view-landing {
  max-width: none;
  padding: 0;
}

#app.view-dashboard {
  max-width: 720px;
}

#app.view-editor {
  max-width: 960px;
}

/* Landing page */
.landing {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 40px 20px;
  text-align: center;
  gap: 32px;
}

.landing-logo {
  font-size: 48px;
  font-weight: 700;
  letter-spacing: 8px;
  color: var(--color-accent);
}

.landing-tagline {
  font-size: 18px;
  color: var(--color-text-dim);
  max-width: 400px;
  line-height: 1.5;
}

.btn-landing-signin {
  font-family: inherit;
  font-size: 16px;
  font-weight: 700;
  padding: 14px 36px;
  border: none;
  border-radius: var(--radius);
  background: var(--color-accent);
  color: var(--color-bg);
  cursor: pointer;
  transition: opacity 0.15s, transform 0.1s;
  letter-spacing: 1px;
}

.btn-landing-signin:hover {
  opacity: 0.9;
}

.btn-landing-signin:active {
  transform: scale(0.98);
}

.landing-footer {
  font-size: 12px;
  color: var(--color-text-dim);
  opacity: 0.5;
}

/* Dashboard */
.dashboard {
  padding: 32px 16px;
}

.dashboard-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 20px;
  gap: 12px;
}

.dashboard-title {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--color-accent);
}

.dashboard-user {
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn-new-project-dashboard {
  width: 100%;
  color: var(--color-accent);
  border-color: var(--color-accent);
  border-style: dashed;
  margin-bottom: 16px;
  padding: 14px;
  font-size: 14px;
}

.btn-new-project-dashboard:hover {
  background: rgba(79, 195, 247, 0.1);
}

.dashboard-project-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

/* Back button in editor header */
.btn-back-to-dashboard {
  font-size: 20px;
  padding: 4px 10px;
  color: var(--color-text-dim);
  border-color: var(--color-border);
  line-height: 1;
}

.btn-back-to-dashboard:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
}