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

html, body {
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, 'Helvetica Neue', 'Arial', sans-serif;
  font-weight: 200;
  background: #fff;
  color: #1a1a1a;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-overflow-scrolling: touch;
  overflow: hidden;
}

body {
  padding: 20px;
  display: flex;
  justify-content: center;
  align-items: flex-start;
}

/* ── Card ──────────────────────────────────────────────── */

.card {
  width: 100%;
  max-width: 1200px;
  height: calc(100vh - 40px);
  background: #f5f5f5;
  border-radius: 20px;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

/* ── Top bar ───────────────────────────────────────────── */

.top-bar {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 24px 32px 0;
}

.top-bar .title {
  font-size: 1.35rem;
  font-weight: 300;
  line-height: 1.3;
  color: #1a1a1a;
  letter-spacing: -0.01em;
}

.top-bar .logo {
  width: 48px;
  height: auto;
  opacity: 0.85;
}

.top-bar .logo-placeholder {
  font-size: 1.6rem;
  font-weight: 700;
  color: #1a1a1a;
  line-height: 1;
  opacity: 0.85;
  user-select: none;
}

/* ── Main content ──────────────────────────────────────── */

.content {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding: 20px 32px;
  text-align: center;
  overflow-y: auto;
}

.state-text {
  font-size: 0.9rem;
  font-weight: 400;
  color: #555;
  line-height: 1.7;
  margin-bottom: 24px;
  max-width: 340px;
}

.state-text.error { color: #d32f2f; }

.sub-text {
  font-size: 0.75rem;
  color: #999;
  margin-bottom: 16px;
}

.step-label {
  font-size: 0.72rem;
  color: #5b6670;
  margin-bottom: 12px;
  font-weight: 400;
}

.instructions {
  background: #e8e8e6;
  border-radius: 10px;
  padding: 16px 20px;
  margin-bottom: 16px;
  text-align: left;
  max-width: 380px;
  width: 100%;
}

.instruction-item {
  font-size: 0.75rem;
  color: #555;
  line-height: 1.8;
}

.warning-box {
  display: flex;
  align-items: center;
  gap: 12px;
  background: #fff3cd;
  border: 1px solid #ffc107;
  border-radius: 10px;
  padding: 14px 18px;
  max-width: 380px;
  width: 100%;
  margin-bottom: 16px;
  text-align: left;
  font-size: 0.75rem;
  color: #664d03;
  line-height: 1.5;
}

.warning-box .warning-icon {
  flex-shrink: 0;
  font-size: 1.2rem;
  line-height: 1;
}

.warning-box strong {
  font-weight: 600;
}

/* ── Buttons ───────────────────────────────────────────── */

.btn {
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 400;
  padding: 10px 28px;
  border: 1.5px solid #1a1a1a;
  border-radius: 8px;
  background: #f0f0ee;
  color: #1a1a1a;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  letter-spacing: 0.01em;
}

.btn:hover:not(:disabled) {
  background: #1a1a1a;
  color: #f0f0ee;
}

.btn:disabled {
  border-color: #ccc;
  color: #ccc;
  cursor: default;
}

.btn-primary {
  background: #1a1a1a;
  color: #fff;
  border-color: #1a1a1a;
}

.btn-primary:hover:not(:disabled) {
  background: #333;
  border-color: #333;
}

.btn-row {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.btn-sm {
  font-size: 0.72rem;
  padding: 7px 18px;
}

.btn-ghost {
  background: none;
  border: none;
  color: #999;
  font-family: inherit;
  font-size: 0.72rem;
  cursor: pointer;
  padding: 4px 8px;
}

.btn-ghost:hover { color: #555; }

.link-btn {
  background: none;
  border: none;
  color: #6a9cc7;
  font-family: inherit;
  font-size: 0.75rem;
  cursor: pointer;
  padding: 0;
  text-decoration: none;
}

.link-btn:hover { text-decoration: underline; }

/* ── Info box ──────────────────────────────────────────── */

.info-box {
  display: none;
  align-items: center;
  gap: 10px;
  background: #e2e2e0;
  border-radius: 10px;
  padding: 14px 18px;
  max-width: 380px;
  margin-top: 10px;
  text-align: left;
  font-size: 0.75rem;
  color: #555;
  line-height: 1.5;
}

.info-box.visible { display: flex; }

.info-box .icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #1a1a1a;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  font-weight: 600;
  color: #fff;
  line-height: 1;
}

/* ── Progress ──────────────────────────────────────────── */

.progress-bar {
  width: 100%;
  max-width: 320px;
  height: 4px;
  background: #ddd;
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 12px;
}

.progress-bar .fill {
  height: 100%;
  width: 0%;
  background: #1a1a1a;
  transition: width 0.25s ease;
  border-radius: 2px;
}

.progress-pct {
  font-size: 0.72rem;
  color: #999;
  font-variant-numeric: tabular-nums;
}

/* ── Credit line ──────────────────────────────────────────── */

.credit-line {
  text-align: center;
  padding: 16px 44px;
  font-size: 0.72rem;
  color: #979ca0;
}

.credit-line a {
  color: #979ca0;
  text-decoration: none;
}

.credit-line a:hover {
  text-decoration: underline;
}

/* ── Bottom bar ────────────────────────────────────────── */

.bottom-bar {
  padding: 24px 44px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.bottom-bar .help {
  font-size: 0.75rem;
  font-weight: 500;
  color: #1a1a1a;
  text-decoration: none;
  cursor: pointer;
}

.bottom-bar .help:hover { text-decoration: underline; }

/* ── Log ────────────────────────────────────────────────── */

.log-panel {
  display: none;
  width: 100%;
  text-align: left;
  font-family: 'SF Mono', 'Consolas', 'Menlo', monospace;
  font-size: 0.6rem;
  line-height: 1.7;
  color: #999;
  max-height: 180px;
  overflow-y: auto;
  padding: 12px 44px;
  border-top: 1px solid #ddd;
  word-break: break-all;
  background: #e8e8e6;
}

.log-panel .err { color: #d32f2f; }
.log-panel .ok { color: #1a1a1a; font-weight: 500; }

/* ── Main view container ─────────────────────────────────── */

#mainView {
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* ── Hero device display ─────────────────────────────────── */

.hero-device {
  width: 300px;
  height: 300px;
  flex-shrink: 1;
  border-radius: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
  overflow: hidden;
}

.hero-device > svg {
  width: 100%;
  height: 100%;
}

.hero-device img {
  max-width: 100%;
}

.play-btn {
  cursor: pointer;
  transition: fill 0.15s ease;
}

.play-btn:hover {
  fill: #333;
}

.play-btn.active {
  fill: #d32f2f;
}

.play-btn.active:hover {
  fill: #b71c1c;
}

.tape-reel {
  transform-origin: center;
  transform-box: fill-box;
}

@keyframes spinReel {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.tape-reel.spinning {
  animation: spinReel 2s linear infinite;
}

/* ── Compatible devices ────────────────────────────────── */

.compat-section {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.compat-label {
  font-size: 0.72rem;
  color: #5b6670;
  margin-bottom: 16px;
  font-weight: 400;
}

.device-grid {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}

.device-tile {
  width: 90px;
  height: 90px;
  border: 1px solid #1a1a1a;
  border-radius: 10px;
  background: transparent;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  cursor: default;
}

.device-tile .device-icon {
  width: 60%;
  height: 60%;
}

.device-tile .device-icon svg {
  width: 100%;
  height: 100%;
}

.device-tile .device-name {
  font-size: 0.62rem;
  font-weight: 400;
  color: #5b6670;
  letter-spacing: 0.02em;
}

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

/* ── State visibility ──────────────────────────────────── */

[data-state] { display: none; }
[data-state].active { display: flex; flex-direction: column; align-items: center; }
.btn-row[data-state].active { display: flex; flex-direction: row; }

/* ── Album editor ──────────────────────────────────────── */

.album-editor {
  width: 100%;
  max-width: 520px;
  text-align: left;
}

.album-header-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.album-header-row input {
  flex: 1;
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 400;
  padding: 8px 12px;
  border: 1.5px solid #ddd;
  border-radius: 8px;
  background: #fff;
  color: #1a1a1a;
  outline: none;
  transition: border-color 0.15s;
}

.album-header-row input:focus {
  border-color: #1a1a1a;
}

.album-duration {
  font-size: 0.72rem;
  color: #999;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

.song-list-header {
  display: grid;
  grid-template-columns: 28px 24px 1fr 1fr 52px 28px;
  gap: 6px;
  padding: 6px 8px;
  font-size: 0.65rem;
  color: #999;
  font-weight: 400;
  text-transform: lowercase;
  border-bottom: 1px solid #ddd;
}

.song-list {
  margin-bottom: 16px;
  min-height: 20px;
}

.song-row {
  display: grid;
  grid-template-columns: 28px 24px 1fr 1fr 52px 28px;
  gap: 6px;
  padding: 7px 8px;
  align-items: center;
  border-bottom: 1px solid #eee;
  transition: background 0.1s;
}

.song-row:hover {
  background: #eee;
}

.song-nr {
  font-size: 0.72rem;
  color: #999;
  text-align: center;
  cursor: pointer;
  user-select: none;
}

.song-nr:hover { color: #555; }

.song-row input[type="text"] {
  font-family: inherit;
  font-size: 0.75rem;
  font-weight: 300;
  padding: 4px 8px;
  border: 1px solid transparent;
  border-radius: 5px;
  background: transparent;
  color: #1a1a1a;
  outline: none;
  transition: border-color 0.15s, background 0.15s;
  width: 100%;
}

.song-row input[type="text"]:focus {
  border-color: #ccc;
  background: #fff;
}

.song-row input[type="text"]::placeholder {
  color: #ccc;
}

.song-play {
  width: 18px;
  height: 18px;
  border: none;
  background: none;
  padding: 0;
  cursor: pointer;
  opacity: 0.4;
  transition: opacity 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.song-play:hover { opacity: 0.8; }
.song-play.playing { opacity: 1; }
.song-play svg { width: 14px; height: 14px; }

.song-dur {
  font-size: 0.68rem;
  color: #999;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.song-delete {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border: none;
  background: none;
  color: #ccc;
  font-size: 0.85rem;
  cursor: pointer;
  border-radius: 4px;
  transition: color 0.1s, background 0.1s;
  padding: 0;
  line-height: 1;
  font-family: inherit;
  opacity: 0;
}

.song-row:hover .song-delete { opacity: 1; }

.song-delete:hover {
  color: #d32f2f;
  background: #fde8e8;
}

.song-meta-panel {
  display: none;
  grid-column: 1 / -1;
  padding: 8px 8px 8px 34px;
  background: #fff;
  border-radius: 6px;
  margin-top: 4px;
}

.song-row.expanded .song-meta-panel {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 12px;
  align-items: center;
}

.song-meta-panel .meta-label {
  font-size: 0.65rem;
  color: #999;
}

.song-meta-panel .meta-value {
  font-size: 0.68rem;
  color: #666;
  font-variant-numeric: tabular-nums;
}

.song-meta-panel input[type="text"] {
  font-family: inherit;
  font-size: 0.68rem;
  padding: 2px 6px;
  border: 1px solid #ddd;
  border-radius: 4px;
  background: #fff;
  color: #1a1a1a;
  outline: none;
  width: 60px;
}

.song-meta-panel input[type="text"]:focus {
  border-color: #1a1a1a;
}

/* ── WAV drop zone ─────────────────────────────────────── */

.wav-drop-zone {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 24px 16px;
  border: 1.5px dashed #ccc;
  border-radius: 10px;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
  margin-bottom: 16px;
}

.wav-drop-zone:hover {
  border-color: #999;
  background: #eee;
}

.wav-drop-zone label {
  cursor: pointer;
  font-size: 0.72rem;
  color: #999;
  line-height: 1.6;
}

.wav-drop-overlay {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: rgba(0,0,0,0.5);
  color: #fff;
  font-size: 0.9rem;
  line-height: 1.6;
  backdrop-filter: blur(4px);
  z-index: 100;
  pointer-events: none;
}

/* ── Storage status badge ──────────────────────────────── */

.storage-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.68rem;
  color: #999;
  margin-bottom: 16px;
}

.storage-status .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #ccc;
}

.storage-status.connected .dot { background: #4caf50; }
.storage-status.connecting .dot {
  background: #ff9800;
  animation: pulse 1s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* ── Device info panel ─────────────────────────────────── */

.device-info {
  background: #1a1a1a;
  border: 1px solid #2a2a2a;
  border-radius: 8px;
  padding: 12px 14px;
  margin-bottom: 16px;
  font-size: 0.72rem;
}

.device-info-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #888;
  margin-bottom: 8px;
  font-weight: 600;
  text-transform: lowercase;
}

.device-info-loading {
  font-weight: 400;
  color: #666;
  animation: pulse 1s infinite;
}

.device-info-grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 12px;
}

.device-info-grid .di-label {
  color: #666;
}

.device-info-grid .di-value {
  color: #ccc;
  word-break: break-all;
}

.device-info-grid .di-value.ok { color: #4caf50; }
.device-info-grid .di-value.warn { color: #ff9800; }
.device-info-grid .di-value.err { color: #ef5350; }

/* ── Responsive ────────────────────────────────────────── */

@media (max-width: 700px) {
  body { padding: 10px; }
  .card { width: 100%; min-width: 0; height: calc(100vh - 20px); border-radius: 14px; }
  .top-bar, .bottom-bar { padding-left: 24px; padding-right: 24px; }
  .top-bar { padding-top: 16px; }
  .content { padding: 16px; }
  .log-panel { padding-left: 24px; padding-right: 24px; }
  .top-bar .title { font-size: 1.1rem; }
  .hero-device { width: 180px; height: 180px; }
}