:root {
  --bg: #fff7ef;
  --bg-alt: #f1e4d3;
  --panel: rgba(255, 252, 247, 0.9);
  --panel-strong: rgba(255, 248, 239, 0.98);
  --line: rgba(108, 84, 57, 0.16);
  --line-strong: rgba(108, 84, 57, 0.3);
  --text: #261b14;
  --muted: #7c6858;
  --accent: #f0672d;
  --accent-strong: #cb4a14;
  --accent-soft: rgba(240, 103, 45, 0.14);
  --thumb-active: rgba(240, 103, 45, 0.16);
  --canvas-bg: #efe7dd;
  --panel-tint: rgba(255, 255, 255, 0.28);
  --shadow: 0 22px 54px rgba(115, 77, 32, 0.1);
}

body[data-theme="dark"] {
  --bg: #12141a;
  --bg-alt: #1a1f29;
  --panel: rgba(22, 25, 33, 0.88);
  --panel-strong: rgba(24, 28, 37, 0.96);
  --line: rgba(255, 255, 255, 0.1);
  --line-strong: rgba(255, 255, 255, 0.2);
  --text: #edf1f7;
  --muted: #96a0af;
  --accent: #59c2ff;
  --accent-strong: #2c8fd2;
  --accent-soft: rgba(89, 194, 255, 0.16);
  --thumb-active: rgba(89, 194, 255, 0.14);
  --canvas-bg: #1f2430;
  --panel-tint: rgba(255, 255, 255, 0.04);
  --shadow: 0 22px 54px rgba(0, 0, 0, 0.24);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: "Avenir Next", Avenir, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.45), transparent 28%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-alt) 100%);
}

button,
input,
summary {
  font: inherit;
}

button {
  border: 0;
  appearance: none;
  cursor: pointer;
}

input[type="number"],
input[type="color"],
input[type="range"] {
  width: 100%;
}

a {
  color: inherit;
}

.app-shell {
  width: min(1480px, calc(100% - 0.8rem));
  margin: 0 auto;
  padding: 0.65rem 0 0.8rem;
  display: grid;
  gap: 0.7rem;
}

.panel {
  border: 1px solid var(--line);
  border-radius: 20px;
  background:
    linear-gradient(180deg, var(--panel-tint), transparent 24%),
    linear-gradient(180deg, var(--panel-strong), var(--panel));
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.topbar,
.section-toggle,
.stage-head,
.frame-card,
.frame-actions,
.hero-actions,
.tool-tabs,
.toolbar-actions,
.transport {
  display: flex;
  align-items: center;
}

.topbar {
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.8rem 0.95rem;
}

.brand-block,
.topbar-side {
  min-width: 0;
}

.brand-line {
  display: flex;
  align-items: baseline;
  gap: 0.55rem;
  flex-wrap: wrap;
}

.eyebrow {
  margin: 0;
  color: var(--muted);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
  letter-spacing: -0.04em;
}

h1 {
  font-size: clamp(1.45rem, 2.4vw, 2.4rem);
  line-height: 1;
}

.brand-link {
  font-size: 0.78rem;
  color: var(--muted);
  text-decoration: none;
}

.brand-link:hover {
  color: var(--accent);
}

.topbar-side {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  justify-self: end;
}

.hero-actions,
.tool-tabs,
.toolbar-actions,
.transport {
  gap: 0.35rem;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(210px, 236px) minmax(400px, 1fr) minmax(176px, 220px);
  gap: 0.7rem;
  align-items: start;
}

.side-panel,
.stage-panel {
  padding: 0.75rem;
}

.controls-panel,
.timeline-panel,
.stage-panel {
  min-height: calc(100vh - 116px);
}

.controls-panel,
.timeline-panel {
  overflow: hidden;
}

.controls-panel {
  display: grid;
  align-content: start;
  gap: 0.55rem;
  transition: border-color 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.controls-panel.import-active {
  border-color: color-mix(in srgb, var(--accent) 42%, var(--line));
  box-shadow:
    0 0 0 1px color-mix(in srgb, var(--accent) 24%, transparent),
    var(--shadow);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--accent) 8%, var(--panel-tint)), transparent 24%),
    linear-gradient(180deg, var(--panel-strong), var(--panel));
}

.import-toolset.import-disabled {
  opacity: 0.45;
}

.panel-section-static {
  padding: 0.8rem;
}

.layer-stack-panel {
  display: grid;
  min-height: 220px;
}

.controls-panel.import-collapsed .layer-stack-panel {
  min-height: 440px;
}

.panel-section {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.03);
  overflow: hidden;
}

.panel-section[open] .section-caret {
  transform: rotate(45deg);
}

.section-toggle {
  justify-content: space-between;
  list-style: none;
  cursor: pointer;
  padding: 0.72rem 0.8rem;
  font-weight: 700;
}

.section-toggle::-webkit-details-marker {
  display: none;
}

.section-caret {
  color: var(--muted);
  transition: transform 150ms ease;
}

.compact-top {
  margin-top: 0.7rem;
}

.control-grid,
.toggle-stack,
.toolbar-panel {
  padding: 0 0.8rem 0.8rem;
}

.control-grid {
  display: grid;
  gap: 0.55rem;
}

.two-up {
  grid-template-columns: 1fr 1fr;
}

.control-group,
.slider-group {
  display: grid;
  gap: 0.28rem;
}

.control-group span,
.slider-group span {
  font-size: 0.78rem;
  color: var(--muted);
}

.control-group input[type="number"],
.control-group input[type="color"],
.control-group select {
  min-height: 40px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  padding: 0.55rem 0.65rem;
}

.control-group input[type="color"] {
  padding: 0.2rem;
}

.control-group input[type="range"],
.slider-group input[type="range"] {
  accent-color: var(--accent);
}

.upload-drop,
.toggle-card,
.toggle-pill,
.toolbar-panel,
.frame-card,
.frame-empty {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.045);
}

.upload-drop {
  display: grid;
  place-items: center;
  min-height: 118px;
  margin: 0 0 0.8rem;
  border-radius: 14px;
  transition: border-color 160ms ease, background 160ms ease, transform 160ms ease;
}

.upload-drop input {
  display: none;
}

.upload-title {
  color: #9aa0aa;
  font-size: 1.05rem;
  letter-spacing: 0.04em;
}

.upload-drop.drag-over,
.preview-stage.drag-over {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.toggle-stack {
  display: grid;
  gap: 0.45rem;
}

.toggle-card,
.toggle-pill {
  min-height: 40px;
  gap: 0.55rem;
  padding: 0.6rem 0.7rem;
  border-radius: 12px;
}

.toggle-pill {
  white-space: nowrap;
}

.primary-button,
.secondary-button,
.tool-button,
.frame-icon-button {
  min-height: 38px;
  padding: 0.62rem 0.82rem;
  border-radius: 12px;
  transition: transform 140ms ease, border-color 140ms ease, background 140ms ease;
}

.primary-button {
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
}

.secondary-button,
.tool-button,
.frame-icon-button {
  color: var(--text);
  background: rgba(255, 255, 255, 0.055);
  border: 1px solid var(--line);
}

.icon-button {
  min-width: 40px;
  padding-inline: 0;
}

.primary-button:hover,
.secondary-button:hover,
.tool-button:hover,
.frame-icon-button:hover,
.upload-drop:hover {
  transform: translateY(-1px);
}

.primary-button:disabled,
.secondary-button:disabled,
.tool-button:disabled,
.frame-icon-button:disabled {
  opacity: 0.45;
  cursor: default;
  transform: none;
}

.toolbar-panel {
  display: grid;
  grid-template-columns: auto minmax(104px, 150px) minmax(84px, 112px) 96px 84px;
  gap: 0.45rem;
  align-items: end;
  padding: 0.55rem;
  border-radius: 16px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.14), transparent 40%),
    rgba(255, 255, 255, 0.045);
}

.tool-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.brush-tool-row {
  grid-template-columns: auto 42px;
  align-items: center;
}

.tool-button.active {
  border-color: var(--line-strong);
  background: var(--accent-soft);
}

.size-group strong,
.onion-group strong {
  color: var(--text);
}

.opacity-group strong {
  color: var(--text);
}

.hardness-group span {
  display: flex;
  justify-content: space-between;
  align-items: center;
  letter-spacing: 0;
}

.hardness-group b {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--muted);
}

.hardness-group b:last-child {
  opacity: 0.5;
}

.brush-shape-group select {
  min-width: 0;
  appearance: none;
  -webkit-appearance: none;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--muted) 50%),
    linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position:
    calc(100% - 16px) calc(50% - 3px),
    calc(100% - 11px) calc(50% - 3px);
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  padding-right: 1.8rem;
}

.toolbar-color-group {
  gap: 0;
}

.toolbar-color-group input[type="color"] {
  width: 42px;
  min-width: 42px;
  min-height: 42px;
  padding: 0.14rem;
  border-radius: 12px;
}

.stage-panel {
  display: grid;
  gap: 0.55rem;
  align-content: start;
  min-width: 0;
}

.stage-footer {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 0.55rem;
  width: min(100%, calc(100vh - 210px));
  justify-self: center;
  padding: 0.4rem 0.2rem 0;
  border-top: 1px solid var(--line);
}

.stage-footer-left {
  display: flex;
  align-items: end;
  gap: 0.45rem;
  flex: 0 0 auto;
}

.stage-footer-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.38rem;
  flex: 1 1 auto;
}

.stage-transport {
  gap: 0.35rem;
  justify-content: flex-end;
  flex: 0 0 auto;
}

.stage-background-control {
  min-width: 112px;
  flex: 0 0 auto;
}

.stage-background-row {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.stage-background-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  min-width: 138px;
  min-height: 40px;
  padding: 0.22rem 0.26rem 0.22rem 0.72rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.05);
}

.stage-background-chip-text {
  font-size: 0.78rem;
  color: var(--muted);
  white-space: nowrap;
}

.stage-background-all-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.28rem;
  font-size: 0.72rem;
  color: var(--muted);
  white-space: nowrap;
}

.stage-background-all-toggle input {
  margin: 0;
  accent-color: var(--accent);
}

.stage-background-control input[type="color"] {
  width: 50px;
  min-width: 50px;
  min-height: 34px;
  padding: 0.12rem;
  border-radius: 10px;
}

.footer-action-button {
  min-height: 36px;
  padding: 0.5rem 0.9rem;
  border-radius: 999px;
  white-space: nowrap;
  font-size: 0.88rem;
  line-height: 1;
}

.footer-eraser-button {
  min-width: 86px;
}

.stage-head {
  justify-content: center;
  min-height: 28px;
}

.frame-readout {
  margin: 0;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--muted);
}

.preview-stage {
  width: min(100%, calc(100vh - 210px));
  justify-self: center;
  border-radius: 20px;
  border: 1px solid var(--line);
  background:
    linear-gradient(45deg, rgba(255, 255, 255, 0.06) 25%, transparent 25%, transparent 75%, rgba(255, 255, 255, 0.06) 75%),
    linear-gradient(45deg, rgba(255, 255, 255, 0.06) 25%, transparent 25%, transparent 75%, rgba(255, 255, 255, 0.06) 75%),
    var(--artboard-fill, var(--canvas-bg));
  background-position: 0 0, 14px 14px, 0 0;
  background-size: 28px 28px, 28px 28px, auto;
  overflow: hidden;
}

#previewCanvas {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1;
  background: transparent;
  touch-action: none;
  cursor: crosshair;
}

@media (max-width: 1320px) {
  .workspace {
    grid-template-columns: minmax(192px, 220px) minmax(332px, 1fr) minmax(164px, 196px);
  }

  .preview-stage {
    width: min(100%, calc(100vh - 230px));
  }

  .stage-footer {
    width: min(100%, calc(100vh - 230px));
  }

  .frame-card {
    grid-template-columns: minmax(0, 76px) minmax(0, 1fr);
    gap: 0.24rem;
    padding: 0.22rem;
    min-height: 84px;
  }

  .frame-side {
    gap: 0.22rem;
    min-width: 0;
  }

  .frame-topline {
    gap: 0.16rem;
  }

  .frame-thumb {
    width: 76px;
    height: 76px;
    min-width: 76px;
    min-height: 76px;
  }

  .frame-delay-input {
    min-height: 29px;
    padding: 0.28rem 0.3rem;
    font-size: 0.8rem;
  }

  .frame-icon-button {
    min-width: 24px;
    min-height: 24px;
    font-size: 0.72rem;
  }

  .frame-remove-button {
    font-size: 1.15rem;
    padding: 0;
  }
}

.timeline-panel {
  display: grid;
  align-content: start;
  padding: 0.6rem 0.42rem 0.6rem 0.48rem;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.12), transparent 20%),
    linear-gradient(180deg, var(--panel-strong), var(--panel));
}

.timeline-topbar {
  display: flex;
  align-items: end;
  gap: 0.3rem;
  padding-inline: 0.1rem;
  padding-bottom: 0.4rem;
}

.timeline-subbar {
  display: grid;
  gap: 0.4rem;
  padding-inline: 0.1rem;
  padding-bottom: 0.45rem;
}

.timeline-meta-row {
  display: flex;
  align-items: end;
  gap: 0.32rem;
}

.onion-toggle-card {
  min-height: 38px;
  min-width: 38px;
  justify-content: center;
  padding: 0.35rem;
  flex: 0 0 auto;
}

.onion-toggle-card input {
  appearance: none;
  -webkit-appearance: none;
  margin: 0;
  width: 18px;
  height: 18px;
  border-radius: 6px;
  border: 1px solid color-mix(in srgb, var(--accent) 42%, var(--line));
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(255, 255, 255, 0.78));
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.6),
    0 1px 2px rgba(15, 23, 42, 0.08);
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: border-color 160ms ease, background 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.onion-toggle-card input::after {
  content: "";
  width: 9px;
  height: 5px;
  border-left: 2px solid #fffaf0;
  border-bottom: 2px solid #fffaf0;
  transform: translateY(-1px) rotate(-45deg) scale(0.65);
  opacity: 0;
  transition: transform 160ms ease, opacity 160ms ease;
}

.onion-toggle-card input:hover {
  border-color: color-mix(in srgb, var(--accent) 58%, var(--line));
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.66),
    0 2px 6px rgba(15, 23, 42, 0.1);
}

.onion-toggle-card input:checked {
  border-color: color-mix(in srgb, var(--accent) 78%, #d34f16);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--accent) 92%, white), color-mix(in srgb, var(--accent) 76%, #d34f16));
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.22),
    0 3px 8px rgba(232, 93, 33, 0.22);
}

.onion-toggle-card input:checked::after {
  opacity: 1;
  transform: translateY(-1px) rotate(-45deg) scale(1);
}

.onion-toggle-card input:focus-visible {
  outline: none;
  box-shadow:
    0 0 0 3px color-mix(in srgb, var(--accent) 22%, transparent),
    inset 0 1px 0 rgba(255, 255, 255, 0.22),
    0 3px 8px rgba(232, 93, 33, 0.18);
}

.timeline-onion-group {
  padding: 0;
}

.frame-list {
  display: grid;
  grid-template-columns: 1fr;
  grid-auto-rows: max-content;
  align-content: start;
  gap: 0.35rem;
  max-height: calc(100vh - 182px);
  overflow-y: auto;
  overflow-x: hidden;
  padding-inline: 0.08rem 0.18rem;
}

.frame-card {
  display: grid;
  grid-template-columns: minmax(0, 84px) minmax(0, 1fr);
  align-items: center;
  justify-content: space-between;
  gap: 0.36rem;
  padding: 0.28rem;
  min-width: 0;
  width: 100%;
  min-height: 92px;
  overflow: hidden;
  border-radius: 14px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.08), transparent 34%),
    rgba(255, 255, 255, 0.04);
}

.frame-card.active {
  border-color: var(--accent);
  background: var(--thumb-active);
  box-shadow: inset 0 0 0 1px var(--accent-soft);
}

.frame-side {
  display: grid;
  gap: 0.28rem;
  align-content: center;
  min-width: 0;
}

.frame-topline {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.24rem;
  align-items: center;
}

.frame-thumb {
  display: block;
  width: 84px;
  height: 84px;
  min-width: 84px;
  min-height: 84px;
  flex: 0 0 auto;
  aspect-ratio: 1;
  align-self: start;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  image-rendering: auto;
}

.frame-actions {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.22rem;
  align-content: center;
  min-width: 0;
}

.frame-delay-input {
  min-width: 0;
  min-height: 32px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.07);
  color: var(--text);
  padding: 0.38rem 0.45rem;
  text-align: center;
}

.frame-remove-button {
  border: 0;
  background: transparent;
  color: #e34e45;
  font-size: 1.4rem;
  line-height: 1;
  padding: 0 0.08rem;
  cursor: pointer;
}

.frame-remove-button:hover {
  color: #ff3f32;
}

.mini-rate-group {
  min-width: 66px;
  gap: 0.16rem;
  flex: 1 1 auto;
}

.mini-rate-group span {
  font-size: 0.64rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.mini-rate-group input[type="number"] {
  min-height: 38px;
  text-align: center;
  padding: 0.35rem;
}

.frame-icon-button {
  min-width: 28px;
  min-height: 28px;
  padding: 0;
  border-radius: 9px;
  font-size: 0.82rem;
}

.frame-empty {
  padding: 0.85rem;
  border-radius: 14px;
  text-align: center;
  color: var(--muted);
  line-height: 1.45;
}

.layer-list {
  display: grid;
  gap: 0.35rem;
  max-height: calc(100vh - 520px);
  overflow: auto;
  padding-right: 0.1rem;
}

.controls-panel.import-collapsed .layer-list {
  max-height: calc(100vh - 300px);
}

.layer-card {
  display: grid;
  grid-template-columns: 88px minmax(56px, 72px);
  gap: 0.35rem;
  padding: 0.28rem;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  align-items: start;
  justify-content: start;
}

.layer-card.active {
  border-color: var(--accent);
  background: var(--thumb-active);
  box-shadow: inset 0 0 0 1px var(--accent-soft);
}

.layer-thumb-wrap {
  position: relative;
  width: 88px;
  height: 88px;
}

.layer-thumb {
  width: 88px;
  height: 88px;
  display: block;
  aspect-ratio: 1;
  flex: 0 0 auto;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
}

.layer-duplicate-button {
  position: absolute;
  top: 4px;
  right: 4px;
  min-width: 20px;
  min-height: 20px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: rgba(255, 255, 255, 0.78);
  color: var(--text);
  padding: 0;
  font-size: 0.62rem;
  line-height: 1;
}

.layer-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.22rem;
  align-content: center;
  justify-items: stretch;
  min-width: 0;
}

.layer-remove-button {
  border: 0;
  background: transparent;
  color: #e34e45;
  font-size: 1.35rem;
  line-height: 1;
  padding: 0;
  cursor: pointer;
}

@media (max-width: 1100px) {
  .workspace {
    grid-template-columns: 1fr;
  }

  .controls-panel,
  .timeline-panel,
  .stage-panel {
    min-height: auto;
  }

  .frame-list {
    grid-template-columns: 1fr;
    grid-auto-rows: max-content;
    max-height: min(52vh, 420px);
    overflow-y: auto;
  }

  .frame-card {
    grid-template-columns: minmax(0, 72px) minmax(0, 1fr);
    align-items: flex-start;
    min-height: 80px;
  }

  .frame-actions {
    grid-template-columns: repeat(3, 1fr);
  }

  .toolbar-panel {
    grid-template-columns: 1fr 1fr 1fr;
  }

  .preview-stage {
    width: min(100%, calc(100vw - 2rem));
  }

  .stage-footer {
    width: min(100%, calc(100vw - 2rem));
  }
}

@media (max-width: 760px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .topbar-side,
  .hero-actions {
    flex-wrap: wrap;
  }

  .two-up,
  .tool-tabs {
    grid-template-columns: 1fr;
  }

  .toolbar-panel {
    grid-template-columns: 1fr;
  }

  .stage-footer {
    flex-wrap: wrap;
    justify-content: center;
  }

  .stage-footer-actions {
    width: 100%;
  }

  .timeline-topbar {
    flex-wrap: wrap;
    justify-content: center;
  }

  .timeline-meta-row {
    justify-content: center;
  }

  .frame-thumb {
    width: 72px;
    height: 72px;
    min-width: 72px;
    min-height: 72px;
  }

  .layer-card {
    grid-template-columns: 88px 60px;
    gap: 0.28rem;
  }

  .layer-actions {
    grid-template-columns: 1fr 1fr;
    gap: 0.18rem;
  }
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}