:root {
  --bg: #120f16;
  --bg-deep: #0c0a10;
  --panel: rgba(23, 20, 29, 0.92);
  --panel-soft: rgba(255, 255, 255, 0.04);
  --panel-soft-2: rgba(255, 255, 255, 0.06);
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.14);
  --text: #f4eff8;
  --muted: #aba0b8;
  --accent: #9c6dff;
  --accent-strong: #7a4bff;
  --accent-soft: rgba(156, 109, 255, 0.16);
  --cool: #67d6ff;
  --danger: #ff6278;
  --shadow: 0 28px 80px rgba(0, 0, 0, 0.34);
}

* {
  box-sizing: border-box;
}

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

body {
  font-family: Inter, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(156, 109, 255, 0.18), transparent 30%),
    radial-gradient(circle at top right, rgba(103, 214, 255, 0.12), transparent 24%),
    linear-gradient(180deg, var(--bg-deep) 0%, var(--bg) 48%, #17121a 100%);
}

button,
input {
  font: inherit;
}

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

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

.app-shell {
  width: min(1620px, calc(100% - 0.8rem));
  margin: 0 auto;
  padding: 0.55rem 0 0.8rem;
  display: grid;
  gap: 0.7rem;
}

.panel {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.02));
  border-radius: 22px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.topbar {
  padding: 0.8rem 0.95rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
}

.brand-block {
  min-width: 0;
}

.eyebrow {
  margin: 0;
  color: var(--cool);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.68rem;
  font-weight: 700;
}

h1,
h2 {
  margin: 0;
  letter-spacing: -0.03em;
}

h1 {
  margin-top: 0.15rem;
  font-size: clamp(1.5rem, 2.5vw, 2.6rem);
  line-height: 0.98;
}

h2 {
  margin-top: 0.15rem;
  font-size: clamp(1rem, 1.5vw, 1.28rem);
}

.topbar-side {
  display: grid;
  gap: 0.45rem;
  justify-items: end;
}

.stat-row,
.hero-actions,
.transport,
.toolbar-actions,
.button-stack,
.timeline-mini-actions {
  display: flex;
  flex-wrap: nowrap;
  gap: 0.35rem;
  margin-left: auto;
}

.stat-pill,
.status-pill,
.mini-readout {
  min-height: 36px;
  display: inline-flex;
  align-items: center;
  padding: 0 0.8rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  color: var(--muted);
}

.workspace {
  display: grid;
  grid-template-columns: minmax(230px, 270px) minmax(540px, 1fr) minmax(250px, 310px);
  gap: 0.7rem;
  align-items: start;
}

.side-panel,
.stage-panel {
  padding: 0.8rem;
}

.section-heading,
.stage-head {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 0.65rem;
}

.timeline-heading {
  align-items: center;
}

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

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

.compact-top {
  margin-top: 0.75rem;
}

.control-group,
.slider-group {
  display: grid;
  gap: 0.3rem;
}

.control-group span,
.slider-group span,
.upload-note,
.stage-tip,
.info-card p {
  color: var(--muted);
}

.control-group span,
.slider-group span {
  font-size: 0.8rem;
}

.control-group input[type="number"],
.control-group input[type="color"] {
  min-height: 42px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  padding: 0.6rem 0.75rem;
}

.control-group input[type="color"] {
  padding: 0.22rem;
}

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

.upload-drop,
.info-card,
.toggle-card,
.toggle-pill,
.toolbar,
.frame-card,
.frame-empty {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
}

.upload-drop {
  display: grid;
  gap: 0.24rem;
  padding: 0.85rem;
  border-radius: 16px;
  transition: border-color 160ms ease, background 160ms ease, transform 160ms ease;
}

.upload-drop.drag-over,
.preview-stage.drag-over {
  border-color: rgba(103, 214, 255, 0.55);
  background: rgba(103, 214, 255, 0.08);
}

.upload-drop input {
  display: none;
}

.upload-title {
  font-weight: 700;
}

.upload-note,
.stage-tip,
.info-card p {
  margin: 0;
  font-size: 0.84rem;
  line-height: 1.42;
}

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

.toggle-card,
.toggle-pill {
  min-height: 42px;
  display: flex;
  align-items: center;
  gap: 0.55rem;
  border-radius: 14px;
  padding: 0.65rem 0.75rem;
}

.toggle-pill {
  align-self: end;
  white-space: nowrap;
}

.info-card {
  padding: 0.75rem;
  border-radius: 16px;
  display: grid;
  gap: 0.28rem;
}

.two-col-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.two-col-buttons > .danger-button:last-child {
  grid-column: 1 / -1;
}

.primary-button,
.secondary-button,
.danger-button,
.tool-button,
.frame-icon-button {
  min-height: 42px;
  padding: 0.72rem 0.9rem;
  border-radius: 14px;
  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, 0.05);
  border: 1px solid var(--line);
}

.danger-button {
  color: #fff;
  background: linear-gradient(135deg, #ff7186, var(--danger));
}

.slim-button {
  min-height: 32px;
  padding: 0.38rem 0.62rem;
  border-radius: 11px;
  font-size: 0.82rem;
}

.icon-button {
  min-width: 42px;
  padding-inline: 0;
}

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

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

.stage-panel {
  display: grid;
  gap: 0.7rem;
}

.toolbar {
  padding: 0.65rem;
  border-radius: 18px;
  display: grid;
  grid-template-columns: auto auto minmax(110px, 170px) 86px auto minmax(120px, 170px);
  gap: 0.5rem;
  align-items: end;
}

.tool-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.45rem;
}

.tool-button.active {
  background: linear-gradient(135deg, rgba(103, 214, 255, 0.22), rgba(156, 109, 255, 0.24));
  border-color: rgba(156, 109, 255, 0.38);
}

.size-group strong,
.onion-group strong {
  color: var(--text);
  font-weight: 700;
}

.stage-head {
  align-items: center;
}

.stage-transport {
  justify-content: end;
}

.preview-stage {
  border-radius: 20px;
  border: 1px solid var(--line);
  background:
    linear-gradient(45deg, rgba(255, 255, 255, 0.035) 25%, transparent 25%, transparent 75%, rgba(255, 255, 255, 0.035) 75%),
    linear-gradient(45deg, rgba(255, 255, 255, 0.035) 25%, transparent 25%, transparent 75%, rgba(255, 255, 255, 0.035) 75%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02));
  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;
}

.stage-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.7rem;
}

.status-pill {
  min-width: 0;
}

.timeline-panel {
  display: grid;
  gap: 0.75rem;
}


.frame-list {
  display: grid;
  gap: 0.35rem;
  max-height: calc(100vh - 132px);
  overflow: auto;
  padding-right: 0.15rem;
}

.frame-card {
  display: grid;
  grid-template-columns: 64px minmax(28px, 40px) auto;
  align-items: center;
  gap: 0.5rem;
  padding: 0.42rem;
  border-radius: 16px;
}

.frame-card.active {
  border-color: rgba(103, 214, 255, 0.3);
  background: linear-gradient(135deg, rgba(103, 214, 255, 0.08), rgba(156, 109, 255, 0.1));
  box-shadow: inset 0 0 0 1px rgba(156, 109, 255, 0.18);
}

.frame-thumb {
  width: 64px;
  height: 64px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
}

.frame-main {
  min-width: 0;
  display: grid;
  place-items: center start;
}

.frame-title {
  min-width: 0;
  font-size: 0.92rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.frame-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.28rem;
}

.frame-icon-button {
  min-width: 34px;
  min-height: 34px;
  padding: 0;
  border-radius: 11px;
  font-size: 0.92rem;
}

.frame-empty {
  padding: 1rem;
  border-radius: 16px;
  text-align: center;
  line-height: 1.45;
  color: var(--muted);
}

.timeline-panel .eyebrow {
  margin-right: 0.45rem;
}

.timeline-panel .control-group span {
  font-size: 0.77rem;
}

@media (max-width: 1280px) {
  .workspace {
    grid-template-columns: minmax(220px, 250px) minmax(440px, 1fr) minmax(235px, 280px);
  }

  .toolbar {
    grid-template-columns: auto auto minmax(110px, 1fr) 86px auto minmax(110px, 1fr);
  }
}

@media (max-width: 1080px) {
  .workspace {
    grid-template-columns: 1fr;
  }

  .frame-list {
    max-height: none;
  }

  .topbar,
  .stage-footer,
  .section-heading,
  .stage-head {
    align-items: start;
    flex-direction: column;
  }

  .topbar-side {
    justify-items: start;
  }

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

  .color-group,
  .onion-group,
  .size-group,
  .toggle-pill {
    grid-column: span 2;
  }
}

@media (max-width: 620px) {
  .app-shell {
    width: min(100%, calc(100% - 0.45rem));
  }

  .two-up,
  .two-col-buttons,
  .toolbar {
    grid-template-columns: 1fr;
  }

  .color-group,
  .onion-group,
  .size-group,
  .toggle-pill {
    grid-column: auto;
  }

  .frame-card {
    grid-template-columns: 58px 1fr;
  }

  .frame-actions {
    grid-column: 1 / -1;
    grid-template-columns: repeat(4, 1fr);
  }
}


.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;
}