:root {
  --buzz-purple: #5a3d9c;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --sans: "Space Grotesk", system-ui, sans-serif;
}

html[data-theme="dark"] {
  color-scheme: dark;
  --bg0: #14121a;
  --bg1: #1b1724;
  --bg-end: #121018;
  --glow-a: #3a2a68;
  --glow-b: #2a221c;
  --ink: #efeaf6;
  --muted: #9b93ab;
  --panel: rgba(32, 28, 42, 0.78);
  --panel-border: rgba(236, 228, 248, 0.1);
  --accent: #6b4cbf;
  --accent-ink: #e4d7ff;
  --warn: #e08a5a;
  --line: rgba(236, 228, 248, 0.12);
  --control: rgba(12, 10, 16, 0.45);
  --wash: rgba(90, 61, 156, 0.22);
  --log-bg: #121018;
  --log-ink: #ddd6ea;
  --log-ok: #c4b4f0;
  --viewer-0: #1c1826;
  --viewer-1: #15121c;
  --hint-bg: rgba(18, 16, 24, 0.82);
  --usb-ink: #f0c4a0;
  --usb-bg: rgba(224, 138, 90, 0.18);
  --usb-line: rgba(224, 138, 90, 0.4);
  --code-bg: rgba(236, 228, 248, 0.08);
  --drop-line: rgba(236, 228, 248, 0.22);
}

html[data-theme="light"] {
  color-scheme: light;
  --bg0: #eeeaf4;
  --bg1: #e2dceb;
  --bg-end: #d8d0e4;
  --glow-a: #c4b4e8;
  --glow-b: #e8d5c4;
  --ink: #1a1428;
  --muted: #5c5470;
  --panel: rgba(255, 255, 255, 0.78);
  --panel-border: rgba(26, 20, 40, 0.1);
  --accent: #5a3d9c;
  --accent-ink: #3d2870;
  --warn: #c45c26;
  --line: rgba(26, 20, 40, 0.12);
  --control: rgba(255, 255, 255, 0.72);
  --wash: rgba(90, 61, 156, 0.12);
  --log-bg: #1a1524;
  --log-ink: #ddd6ea;
  --log-ok: #c4b4f0;
  --viewer-0: #eef0f6;
  --viewer-1: #e2e4ef;
  --hint-bg: rgba(255, 255, 255, 0.88);
  --usb-ink: #5a2e0c;
  --usb-bg: rgba(196, 92, 38, 0.14);
  --usb-line: rgba(196, 92, 38, 0.35);
  --code-bg: rgba(26, 20, 40, 0.06);
  --drop-line: rgba(26, 20, 40, 0.22);
}

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

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--bg0);
}

.bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(900px 520px at 8% -12%, var(--glow-a) 0%, transparent 58%),
    radial-gradient(640px 420px at 100% 0%, var(--glow-b) 0%, transparent 52%),
    linear-gradient(165deg, var(--bg0), var(--bg1) 55%, var(--bg-end));
}

.shell {
  width: min(960px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1.5rem 0 3rem;
}

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.75rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.brand-mark {
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 0.65rem;
  background:
    linear-gradient(145deg, #7b5cc8, var(--buzz-purple)),
    repeating-linear-gradient(
      -45deg,
      transparent 0 4px,
      rgba(255, 255, 255, 0.12) 4px 5px
    );
  box-shadow: 0 10px 24px rgba(90, 61, 156, 0.35);
}

.brand-name {
  margin: 0;
  font-weight: 700;
  letter-spacing: 0.02em;
  font-size: 1.15rem;
}

.brand-sub {
  margin: 0.1rem 0 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.top-end {
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

.theme-toggle {
  appearance: none;
  border: 1px solid var(--line);
  background: var(--control);
  color: var(--ink);
  font: inherit;
  font-weight: 600;
  font-size: 0.8rem;
  padding: 0.4rem 0.7rem;
  border-radius: 0.55rem;
  cursor: pointer;
}

.theme-toggle:hover {
  border-color: rgba(107, 76, 191, 0.45);
}

html[data-theme="dark"] .theme-label-to-dark,
html[data-theme="light"] .theme-label-to-light {
  display: none;
}

.status {
  margin: 0;
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  border: 1px solid var(--line);
  background: var(--control);
}

.status[data-state="idle"] {
  color: var(--muted);
}

.status[data-state="connected"] {
  color: var(--accent-ink);
  background: var(--wash);
  border-color: rgba(107, 76, 191, 0.45);
}

.status[data-state="usb"] {
  color: var(--usb-ink);
  background: var(--usb-bg);
  border-color: var(--usb-line);
}

.hero-panel {
  margin-bottom: 1.25rem;
}

.hero-panel h1 {
  margin: 0 0 0.4rem;
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  letter-spacing: -0.02em;
}

.lede {
  margin: 0;
  max-width: 42rem;
  color: var(--muted);
  line-height: 1.5;
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 1rem;
  padding: 1.1rem 1.15rem 1.2rem;
  backdrop-filter: blur(10px);
}

.panel-wide {
  grid-column: 1 / -1;
}

.panel h2 {
  margin: 0 0 0.45rem;
  font-size: 1.05rem;
}

.hint {
  margin: 0 0 1rem;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.45;
}

.hint code,
.note code,
.lede code {
  font-family: var(--mono);
  font-size: 0.84em;
  background: var(--code-bg);
  padding: 0.1em 0.35em;
  border-radius: 0.3em;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.btn {
  appearance: none;
  border: 1px solid transparent;
  border-radius: 0.65rem;
  padding: 0.65rem 0.95rem;
  font: inherit;
  font-weight: 600;
  font-size: 0.92rem;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease, opacity 0.15s ease;
}

.btn:hover:not(:disabled) {
  transform: translateY(-1px);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn.primary {
  background: var(--accent);
  color: #f6f2ff;
}

.btn.accent {
  background: var(--buzz-purple);
  color: #f6f2ff;
}

.btn.ghost {
  background: var(--control);
  border-color: var(--line);
  color: var(--ink);
}

.btn.tiny {
  padding: 0.3rem 0.55rem;
  font-size: 0.78rem;
  background: transparent;
  border-color: var(--line);
}

.meta {
  display: grid;
  gap: 0.45rem;
  margin: 1rem 0 0;
}

.meta div {
  display: grid;
  grid-template-columns: 5.5rem 1fr;
  gap: 0.5rem;
  font-size: 0.86rem;
}

.meta dt {
  margin: 0;
  color: var(--muted);
}

.meta dd {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.8rem;
  word-break: break-all;
}

.note {
  margin: 0.9rem 0 0;
  font-size: 0.86rem;
  color: var(--muted);
}

.soon {
  opacity: 0.85;
}

.badge {
  display: inline-block;
  margin-left: 0.35rem;
  padding: 0.12rem 0.45rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 600;
  vertical-align: middle;
  background: rgba(196, 92, 38, 0.15);
  color: var(--warn);
}

.drop {
  border: 1.5px dashed var(--drop-line);
  border-radius: 0.85rem;
  padding: 1.4rem 1rem;
  text-align: center;
  color: var(--muted);
  background: var(--control);
}

.drop input {
  display: none;
}

.log-panel {
  margin-top: 1rem;
}

.log-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.55rem;
}

.log-head h2 {
  margin: 0;
}

.log {
  margin: 0;
  min-height: 10rem;
  max-height: 18rem;
  overflow: auto;
  padding: 0.85rem 0.95rem;
  border-radius: 0.75rem;
  background: var(--log-bg);
  color: var(--log-ink);
  font-family: var(--mono);
  font-size: 0.78rem;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
}

.log .ok {
  color: var(--log-ok);
}

.log .err {
  color: #ff9b7a;
}

.log .dim {
  color: #7f97a3;
}

/* ----- tabs / views ----- */
.tabs {
  display: flex;
  gap: 0.35rem;
  padding: 0.25rem;
  border-radius: 0.75rem;
  background: var(--control);
  border: 1px solid var(--line);
}

.tab {
  appearance: none;
  border: none;
  background: transparent;
  font: inherit;
  font-weight: 600;
  font-size: 0.88rem;
  padding: 0.45rem 0.9rem;
  border-radius: 0.55rem;
  cursor: pointer;
  color: var(--muted);
}

.tab.active {
  background: var(--accent);
  color: #f6f2ff;
}

.view {
  display: none;
}

.view.active {
  display: block;
}

.top {
  flex-wrap: wrap;
}

/* ----- studio (layout type Robosen Studio) ----- */
.shell:has(#view-studio.active) {
  width: min(1280px, calc(100% - 1.25rem));
}

#view-studio.active {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.studio-desk {
  display: grid;
  grid-template-columns: minmax(200px, 240px) minmax(0, 1fr) minmax(220px, 280px);
  gap: 0.75rem;
  align-items: start;
  min-height: 0;
}

.studio-center {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  min-width: 0;
}

.studio-rail,
.studio-settings,
.studio-stage,
.studio-storyboard,
.studio-files {
  margin: 0;
}

.studio-section-title {
  margin: 0 0 0.65rem;
  font-size: 0.95rem;
  font-weight: 600;
}

.studio-rail-top {
  margin-bottom: 1rem;
}

.studio-name-field input {
  width: 100%;
  font: inherit;
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--ink);
  padding: 0.45rem 0.55rem;
  border-radius: 0.45rem;
  border: 1px solid var(--line);
  background: var(--control);
}

.studio-rail-section {
  margin-top: 1.1rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--line);
}

.studio-rail-section:first-of-type {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.actions.stack {
  flex-direction: column;
  align-items: stretch;
}

.actions.stack .btn,
.actions.stack .file-btn {
  width: 100%;
  justify-content: center;
}

.studio-action-card {
  border: 1px solid var(--line);
  border-radius: 0.65rem;
  background: var(--control);
  overflow: hidden;
}

.studio-action-thumb {
  height: 5.5rem;
  background:
    radial-gradient(circle at 50% 70%, rgba(107, 76, 191, 0.35), transparent 55%),
    linear-gradient(160deg, var(--viewer-0), var(--viewer-1));
}

.studio-action-label {
  margin: 0;
  padding: 0.45rem 0.55rem;
  font-size: 0.78rem;
  font-family: var(--mono);
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.studio-stage {
  display: flex;
  flex-direction: column;
  padding: 0.45rem;
  min-height: 0;
  width: 100%;
}

.studio-viewport.buzz3d-wrap {
  flex: none;
  width: 100%;
  height: 19rem;
  min-height: 19rem;
  max-height: 19rem;
  border-radius: 0.65rem;
}

.studio-play {
  position: absolute;
  left: 50%;
  bottom: 1rem;
  transform: translateX(-50%);
  z-index: 3;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  border: none;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.92);
  color: #1a1428;
  display: grid;
  place-items: center;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.28);
}

.studio-play:hover {
  transform: translateX(-50%) scale(1.05);
}

.studio-play.is-playing {
  background: var(--accent);
  color: #fff;
}

.studio-play-icon {
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 0.45rem 0 0.45rem 0.75rem;
  border-color: transparent transparent transparent currentColor;
  margin-left: 0.15rem;
}

.studio-play.is-playing .studio-play-icon {
  width: 0.7rem;
  height: 0.7rem;
  border: none;
  background: currentColor;
  margin-left: 0;
  border-radius: 0.1rem;
}

.studio-settings {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  overflow: visible;
}

.studio-globals {
  margin-top: 1rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 0.55rem;
}

.studio-music-field {
  margin-bottom: 0;
}

.studio-storyboard {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto 1fr;
  gap: 0.55rem 0.75rem;
  align-items: start;
  flex: 0 0 auto;
  order: 0;
}

.studio-files {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem 1rem;
  flex: 0 0 auto;
}

.studio-files .studio-section-title {
  margin: 0;
  min-width: 4.5rem;
}

.studio-files-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  align-items: center;
  margin: 0;
}

.storyboard-toolbar {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.studio-storyboard .timeline {
  display: flex;
  flex-wrap: nowrap;
  gap: 0.55rem;
  margin: 0;
  min-height: 5.5rem;
  overflow-x: auto;
  padding-bottom: 0.25rem;
}

.frame-chip {
  appearance: none;
  border: 1px solid var(--line);
  background: var(--control);
  border-radius: 0.55rem;
  padding: 0;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0;
  min-width: 5.5rem;
  width: 5.5rem;
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--ink);
  overflow: hidden;
  flex: 0 0 auto;
}

.frame-chip.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
}

.frame-thumb {
  height: 3.4rem;
  background:
    radial-gradient(circle at 50% 80%, rgba(107, 76, 191, 0.28), transparent 50%),
    linear-gradient(165deg, var(--viewer-0), var(--viewer-1));
  position: relative;
  background-size: cover;
  background-position: center 20%;
  background-repeat: no-repeat;
}

.frame-thumb.has-shot {
  background-color: var(--viewer-1);
}

.frame-thumb::after {
  content: attr(data-idx);
  position: absolute;
  left: 0.35rem;
  top: 0.25rem;
  font-weight: 700;
  font-size: 0.72rem;
  color: #fff;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.85);
  opacity: 0.95;
}

.frame-meta {
  display: flex;
  justify-content: space-between;
  gap: 0.25rem;
  padding: 0.3rem 0.4rem;
  color: var(--muted);
}

.frame-add {
  appearance: none;
  width: 5.5rem;
  min-height: 5.5rem;
  border: 1.5px dashed var(--line);
  border-radius: 0.55rem;
  background: transparent;
  color: var(--muted);
  font-size: 1.6rem;
  font-weight: 500;
  cursor: pointer;
  align-self: stretch;
}

.frame-add:hover {
  border-color: var(--accent);
  color: var(--accent-ink);
  background: var(--wash);
}

.subhead {
  margin: 1.1rem 0 0.45rem;
  font-size: 0.92rem;
}

.hint.tight,
.note.tight {
  margin-top: 0;
  margin-bottom: 0.65rem;
}

.studio-audio-needed {
  margin: 0 0 0.65rem;
  padding: 0.55rem 0.65rem;
  border-radius: 0.45rem;
  border: 1px solid var(--accent);
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  color: var(--ink);
  font-size: 0.82rem;
  line-height: 1.35;
}

.studio-audio-needed strong {
  font-weight: 700;
}

.studio-audio-path {
  display: inline-block;
  margin-top: 0.2rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--muted);
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  margin-bottom: 0.75rem;
  font-size: 0.86rem;
  color: var(--muted);
}

.field input,
.field select,
.pose-controls input,
.pose-controls select {
  font: inherit;
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--ink);
  padding: 0.5rem 0.6rem;
  border-radius: 0.5rem;
  border: 1px solid var(--line);
  background: var(--control);
}

.field.inline {
  margin: 0;
}

.pose-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.35rem;
}

.file-btn {
  display: inline-flex;
  align-items: center;
}

.audio-player {
  width: 100%;
  margin-top: 0.55rem;
}

.hidden {
  display: none !important;
}

.panel-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.55rem;
}

.panel-head h2 {
  margin: 0;
}

.joints {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.65rem;
  max-height: none;
  overflow: visible;
  padding-right: 0;
  align-content: start;
}

.buzz3d-wrap {
  position: relative;
  border-radius: 0.85rem;
  border: 1px solid var(--line);
  background: linear-gradient(160deg, var(--viewer-0) 0%, var(--viewer-1) 100%);
  overflow: hidden;
  min-height: 19rem;
  height: 19rem;
}

.buzz3d-canvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: grab;
}

.buzz3d-canvas:active {
  cursor: grabbing;
}

.buzz3d-hint {
  position: absolute;
  left: 0.75rem;
  bottom: 0.65rem;
  margin: 0;
  padding: 0.25rem 0.5rem;
  border-radius: 0.4rem;
  font-size: 0.72rem;
  color: var(--muted);
  background: var(--hint-bg);
  pointer-events: auto;
  user-select: all;
  max-width: calc(100% - 5rem);
  font-family: var(--mono);
  z-index: 2;
}

.studio-viewport .buzz3d-hint {
  bottom: 3.6rem;
}

.joint-row.selected {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 0.4rem;
  background: var(--wash);
}

.joint-row.selected .joint-label {
  color: var(--ink);
  font-weight: 600;
}

.joint-group {
  display: none;
}

.joint-group.joint-group-show {
  display: block;
  grid-column: 1 / -1;
  margin: 0.35rem 0 0.15rem;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
}

.joint-group-visual {
  margin-top: 0.95rem !important;
  padding-top: 0.65rem;
  border-top: 1px solid var(--line);
}

.joint-tag {
  display: inline-block;
  margin-left: 0.25rem;
  padding: 0.05rem 0.28rem;
  border-radius: 0.25rem;
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--muted);
  background: var(--control);
  border: 1px solid var(--line);
  vertical-align: middle;
}

.joint-row-visual .joint-label {
  color: var(--muted);
}

.joint-row {
  display: grid;
  grid-template-columns: 4.2rem 1fr 2.8rem;
  gap: 0.45rem;
  align-items: center;
  font-size: 0.8rem;
}

.joint-label {
  color: var(--muted);
}

.joint-row input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

.joint-row input[type="number"] {
  font-family: var(--mono);
  font-size: 0.75rem;
  padding: 0.25rem;
  border-radius: 0.35rem;
  border: 1px solid var(--line);
  background: var(--control);
  color: var(--ink);
  width: 100%;
  text-align: right;
}

/* ----- cleanup file list ----- */
.file-list-head {
  display: flex;
  align-items: center;
  margin: 0.75rem 0 0.35rem;
}

.chk-all {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--muted);
  cursor: pointer;
}

.file-list {
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  background: var(--control);
  max-height: 16rem;
  overflow: auto;
  padding: 0.35rem;
}

.file-row {
  display: grid;
  grid-template-columns: auto 4.2rem 1fr auto;
  gap: 0.55rem;
  align-items: center;
  padding: 0.4rem 0.5rem;
  border-radius: 0.45rem;
  font-size: 0.82rem;
  cursor: pointer;
}

.file-row:hover {
  background: var(--wash);
}

.file-kind {
  font-family: var(--mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  color: var(--accent-ink);
  background: var(--wash);
  padding: 0.1rem 0.35rem;
  border-radius: 0.3rem;
  text-align: center;
}

.file-path {
  font-family: var(--mono);
  font-size: 0.78rem;
  word-break: break-all;
}

.file-size {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.72rem;
  white-space: nowrap;
}

@media (max-width: 980px) {
  .studio-desk {
    grid-template-columns: 1fr;
  }

  .studio-center {
    order: -1;
  }

  .studio-viewport.buzz3d-wrap {
    height: 16rem;
    min-height: 16rem;
    max-height: 16rem;
  }

  .studio-storyboard {
    grid-template-columns: 1fr;
  }

  .frame-add {
    width: 100%;
    min-height: 3rem;
  }

  .file-row {
    grid-template-columns: auto 1fr auto;
  }

  .file-kind {
    display: none;
  }
}

@media (max-width: 720px) {
  .grid {
    grid-template-columns: 1fr;
  }

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