:root {
  color-scheme: light;
  --bg: #f4f8fb;
  --surface: #ffffff;
  --surface-soft: #eef7fb;
  --surface-blue: #eaf6ff;
  --text: #172026;
  --muted: #667789;
  --border: #d7e3ec;
  --border-strong: #b8cad7;
  --teal: #10a59b;
  --teal-dark: #087b74;
  --teal-soft: #dff8f5;
  --coral: #ef6262;
  --yellow: #f6b73c;
  --blue: #4f7cff;
  --shadow: 0 20px 50px rgba(23, 32, 38, 0.1);
  --radius: 16px;
  --radius-sm: 10px;
  --control: 44px;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  min-width: 320px;
  margin: 0;
  background:
    linear-gradient(180deg, #f8fbfd 0%, var(--bg) 56%),
    radial-gradient(circle at 18% 8%, rgba(16, 165, 155, 0.1), transparent 28%);
  color: var(--text);
}

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

.app {
  min-height: 100vh;
  padding: 18px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  margin-bottom: 14px;
}

.brand,
.top-actions,
.playback,
.frame-actions,
.camera-actions,
.split-fields {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: var(--teal);
  color: #ffffff;
  font-size: 15px;
  font-weight: 850;
  box-shadow: 0 10px 20px rgba(16, 165, 155, 0.24);
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: 30px;
  line-height: 1.05;
  font-weight: 830;
}

.topbar p,
.start-copy p,
.privacy-note,
.panel-title span,
#previewMeta,
#timelineMeta,
#statusText,
#cameraStatus,
.entry-card em,
.upload-zone span {
  color: var(--muted);
}

.topbar p {
  margin-top: 5px;
  font-size: 14px;
}

.soft-button,
.primary-button,
.export-button,
.icon-button,
.mode-button,
.tool-button,
.entry-card,
.timeline-item,
.frame-mini-action {
  min-height: var(--control);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-weight: 760;
}

.soft-button {
  background: var(--surface);
  border-color: var(--border);
  color: var(--text);
  padding: 0 14px;
}

.soft-button:hover,
.mode-button:hover,
.tool-button:hover,
.timeline-item:hover {
  border-color: var(--teal);
}

.soft-button.danger {
  color: #b42318;
}

.primary-button,
.export-button {
  background: var(--teal);
  color: #ffffff;
  padding: 0 16px;
}

.primary-button:hover,
.export-button:hover {
  background: var(--teal-dark);
}

.icon-button {
  width: var(--control);
  padding: 0;
  background: #ffffff;
  border-color: var(--border);
  color: var(--text);
  font-size: 26px;
}

button:disabled,
input:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.start-screen {
  width: 100%;
  min-height: calc(100vh - 98px);
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 22px;
  overflow-x: hidden;
}

.start-screen.is-hidden,
.workspace.is-hidden,
.resume-button.is-hidden {
  display: none;
}

.start-copy {
  max-width: min(100%, 780px);
  padding: 0 12px;
  text-align: center;
}

.start-copy h2 {
  font-size: clamp(30px, 5vw, 54px);
  line-height: 1.05;
  font-weight: 850;
}

.start-copy p {
  margin-top: 10px;
  font-size: 17px;
  overflow-wrap: anywhere;
}

.entry-grid {
  width: min(100%, 780px);
  display: grid;
  grid-template-columns: repeat(3, minmax(190px, 250px));
  justify-content: center;
  gap: 14px;
}

.entry-card {
  min-height: 190px;
  display: grid;
  align-content: center;
  gap: 10px;
  padding: 22px;
  background: var(--surface);
  border-color: var(--border);
  color: var(--text);
  box-shadow: var(--shadow);
  text-align: left;
}

.entry-card:hover {
  transform: translateY(-2px);
}

.entry-icon {
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  border-radius: 18px;
  color: #ffffff;
  font-size: 28px;
}

.entry-card.draw .entry-icon {
  background: var(--teal);
}

.entry-card.camera .entry-icon {
  background: var(--coral);
}

.entry-card.import .entry-icon {
  background: var(--yellow);
}

.entry-card strong {
  font-size: 24px;
}

.entry-card em {
  font-size: 14px;
  font-style: normal;
}

.privacy-note {
  width: min(100%, 720px);
  padding: 0 12px;
  font-size: 13px;
  line-height: 1.55;
  text-align: center;
}

.resume-button {
  width: fit-content;
  min-height: 46px;
  margin: 0 auto;
  padding: 0 18px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--teal-soft);
  color: var(--teal-dark);
  font-weight: 780;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(190px, 230px) minmax(0, 1fr) minmax(270px, 320px);
  grid-template-rows: auto auto minmax(0, 1fr);
  gap: 14px;
  min-height: calc(100vh - 98px);
}

.workspace.mode-draw {
  --workflow-accent: var(--teal);
  --workflow-soft: var(--teal-soft);
}

.workspace.mode-camera {
  --workflow-accent: var(--coral);
  --workflow-soft: #fff1f1;
  grid-template-columns: minmax(320px, 390px) minmax(0, 1fr);
}

.workspace.mode-import {
  --workflow-accent: var(--yellow);
  --workflow-soft: #fff8df;
  grid-template-columns: minmax(320px, 390px) minmax(0, 1fr);
}

.mode-switcher {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.workflow-hero {
  grid-column: 1 / -1;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  padding: 16px 18px 16px 20px;
  border-color: color-mix(in srgb, var(--workflow-accent, var(--teal)) 42%, var(--border));
  border-left: 6px solid var(--workflow-accent, var(--teal));
  background:
    linear-gradient(90deg, var(--workflow-soft, var(--teal-soft)), rgba(255, 255, 255, 0.9) 54%),
    #ffffff;
}

.workflow-copy {
  display: grid;
  gap: 4px;
}

.workflow-copy span {
  color: var(--workflow-accent, var(--teal));
  font-size: 13px;
  font-weight: 850;
}

.workflow-copy h2 {
  font-size: 24px;
  line-height: 1.15;
}

.workflow-copy p {
  color: var(--muted);
  font-size: 14px;
}

.workflow-actions {
  display: flex;
  gap: 10px;
  align-items: stretch;
}

.workflow-actions button {
  min-width: 118px;
}

.mode-button {
  background: #ffffff;
  border-color: var(--border);
  color: var(--text);
  font-size: 16px;
}

.mode-button.is-active {
  background: var(--teal-soft);
  border-color: var(--teal);
  color: var(--teal-dark);
}

.workspace.mode-camera .mode-button.is-active {
  background: #fff1f1;
  border-color: var(--coral);
  color: #b42318;
}

.workspace.mode-import .mode-button.is-active {
  background: #fff8df;
  border-color: var(--yellow);
  color: #8a5a00;
}

.panel {
  min-width: 0;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.tool-panel,
.side-panel,
.stage-panel {
  grid-row: 3;
  min-height: 0;
  overflow: hidden;
}

.workspace.mode-draw .tool-panel {
  grid-column: 1;
  border-color: color-mix(in srgb, var(--teal) 42%, var(--border));
}

.workspace.mode-draw .stage-panel {
  grid-column: 2;
}

.workspace.mode-draw .side-panel {
  grid-column: 3;
}

.workspace.mode-camera .tool-panel,
.workspace.mode-import .tool-panel {
  display: none;
}

.workspace.mode-camera .side-panel,
.workspace.mode-import .side-panel {
  grid-column: 1;
  border-color: color-mix(in srgb, var(--workflow-accent) 40%, var(--border));
}

.workspace.mode-camera .stage-panel,
.workspace.mode-import .stage-panel {
  grid-column: 2;
}

.tool-panel,
.side-panel {
  padding: 14px;
  overflow-y: auto;
}

.stage-panel {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 14px;
}

.panel-title,
.stage-header,
.timeline-header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}

.panel-title h2,
.stage-header h2,
.timeline-header h2 {
  font-size: 17px;
  line-height: 1.2;
  font-weight: 820;
}

.panel-title span,
.timeline-header span,
#previewMeta {
  font-size: 13px;
}

.tool-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin: 14px 0;
}

.tool-button {
  min-height: 64px;
  display: grid;
  gap: 4px;
  place-items: center;
  background: #ffffff;
  border-color: var(--border);
  color: var(--text);
  font-size: 13px;
}

.tool-button span {
  font-size: 22px;
}

.tool-button.is-active {
  background: var(--teal-soft);
  border-color: var(--teal);
  color: var(--teal-dark);
}

.field {
  display: grid;
  gap: 8px;
  margin: 12px 0;
  color: var(--muted);
  font-size: 13px;
}

.field > span,
.switch-field > span {
  display: flex;
  justify-content: space-between;
  color: var(--text);
  font-weight: 760;
}

.switch-field {
  min-height: 42px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin: 12px 0;
  font-size: 14px;
}

input[type="number"],
input[type="text"],
select {
  width: 100%;
  min-height: 40px;
  padding: 0 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: #ffffff;
  color: var(--text);
}

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

input[type="checkbox"] {
  width: 21px;
  height: 21px;
  accent-color: var(--teal);
}

input[type="color"] {
  width: 100%;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 4px;
  background: #ffffff;
}

.quick-colors {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 7px;
  margin-top: 12px;
}

.quick-colors button {
  aspect-ratio: 1;
  border: 2px solid var(--border);
  border-radius: 999px;
  background: var(--swatch);
}

.stage-header {
  flex-wrap: wrap;
}

.canvas-shell {
  position: relative;
  flex: 1;
  min-height: 420px;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background:
    linear-gradient(45deg, #eaf1f6 25%, transparent 25%),
    linear-gradient(-45deg, #eaf1f6 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #eaf1f6 75%),
    linear-gradient(-45deg, transparent 75%, #eaf1f6 75%);
  background-color: #ffffff;
  background-position:
    0 0,
    0 14px,
    14px -14px,
    -14px 0;
  background-size: 28px 28px;
  overflow: hidden;
  touch-action: none;
}

#drawCanvas {
  width: min(100%, 860px);
  max-height: min(100%, 64vh);
  aspect-ratio: 4 / 3;
  height: auto;
  border-radius: 14px;
  background: #ffffff;
  box-shadow: 0 18px 38px rgba(23, 32, 38, 0.15);
  touch-action: none;
}

.empty-state {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  gap: 8px;
  text-align: center;
  background: rgba(255, 255, 255, 0.76);
}

.empty-state strong {
  font-size: 24px;
}

.empty-state span {
  color: var(--muted);
}

.timeline-header {
  align-items: end;
}

.timeline-header > div:first-child {
  display: grid;
  gap: 3px;
}

.timeline {
  min-height: 116px;
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding: 2px 2px 8px;
}

.timeline-item {
  flex: 0 0 104px;
  display: grid;
  gap: 5px;
  padding: 6px;
  background: var(--surface-soft);
  border: 2px solid transparent;
  color: var(--text);
}

.timeline-item.is-active {
  border-color: var(--teal);
  background: #ffffff;
}

.timeline-item img {
  width: 88px;
  height: 64px;
  object-fit: cover;
  border-radius: 9px;
  background: #ffffff;
}

.timeline-item span {
  color: var(--muted);
  font-size: 12px;
}

.frame-mini-actions {
  display: flex;
  gap: 4px;
}

.frame-mini-action {
  min-height: 28px;
  flex: 1;
  padding: 0;
  background: #ffffff;
  border-color: var(--border);
}

.side-panel {
  display: grid;
  align-content: start;
  gap: 14px;
}

.camera-box,
.import-box,
.export-box,
.advanced-box {
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
}

.camera-box,
.import-box,
.export-box {
  min-width: 0;
}

.workspace.mode-draw .export-box {
  order: 1;
}

.workspace.mode-draw .camera-box {
  order: 2;
}

.workspace.mode-draw .import-box {
  order: 3;
}

.workspace.mode-camera .camera-box,
.workspace.mode-import .import-box {
  order: 1;
  padding: 14px;
  border: 1px solid color-mix(in srgb, var(--workflow-accent) 36%, var(--border));
  border-radius: var(--radius);
  background: var(--workflow-soft);
}

.workspace.mode-camera .export-box,
.workspace.mode-import .export-box {
  order: 2;
}

.workspace.mode-camera .import-box,
.workspace.mode-import .camera-box {
  order: 3;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: #f8fbfd;
}

.advanced-box {
  order: 4;
}

.workspace.mode-draw .camera-preview,
.workspace.mode-import .camera-preview {
  display: none;
}

.workspace.mode-draw #cameraStatus,
.workspace.mode-import #cameraStatus {
  display: none;
}

.workspace.mode-draw .upload-zone label,
.workspace.mode-camera .upload-zone label {
  min-height: 64px;
}

.workspace.mode-import .upload-zone label {
  min-height: 158px;
  border-color: color-mix(in srgb, var(--yellow) 50%, var(--border-strong));
  background: #fffdf4;
}

.workspace.mode-camera .camera-preview {
  min-height: 236px;
  border-color: color-mix(in srgb, var(--coral) 36%, var(--border));
  background: #fff7f7;
}

.camera-preview {
  position: relative;
  margin: 12px 0;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface-blue);
}

.camera-preview video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: none;
}

.camera-preview.is-live video {
  display: block;
}

.camera-placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 18px;
  color: var(--muted);
  text-align: center;
}

.camera-preview.is-live .camera-placeholder {
  display: none;
}

.camera-actions {
  align-items: stretch;
}

.camera-actions button {
  flex: 1;
}

#cameraStatus,
#statusText {
  min-height: 18px;
  font-size: 13px;
}

.upload-zone {
  margin-top: 12px;
}

.upload-zone input {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  opacity: 0;
  pointer-events: none;
}

.upload-zone label {
  min-height: 92px;
  display: grid;
  place-content: center;
  gap: 6px;
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-sm);
  background: #ffffff;
  text-align: center;
}

.upload-zone.is-dragging label,
.upload-zone label:hover {
  border-color: var(--teal);
  background: var(--teal-soft);
}

.export-button {
  width: 100%;
  min-height: 50px;
  margin-top: 4px;
  font-size: 17px;
}

.progress {
  height: 8px;
  margin: 12px 0 8px;
  overflow: hidden;
  border-radius: 999px;
  background: #e8eef3;
}

.progress span {
  display: block;
  width: 0%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--teal), var(--yellow));
  transition: width 160ms ease;
}

.download-link {
  display: none;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--teal-dark);
  font-weight: 780;
  text-decoration: none;
}

.download-link.is-ready {
  display: flex;
}

#outputPreview {
  display: none;
  width: 100%;
  max-height: 150px;
  margin-top: 12px;
  object-fit: contain;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: #ffffff;
}

#outputPreview.is-ready {
  display: block;
}

.advanced-box {
  border-bottom: 0;
}

.advanced-box summary {
  min-height: 42px;
  display: flex;
  align-items: center;
  color: var(--teal-dark);
  font-weight: 820;
  cursor: pointer;
}

.split-fields {
  align-items: end;
}

.split-fields .field {
  flex: 1;
}

@media (max-width: 1180px) {
  .workspace {
    grid-template-columns: minmax(180px, 220px) minmax(0, 1fr);
  }

  .side-panel {
    grid-column: 1 / -1;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .workspace.mode-camera,
  .workspace.mode-import {
    grid-template-columns: minmax(300px, 360px) minmax(0, 1fr);
  }

  .workspace.mode-camera .side-panel,
  .workspace.mode-import .side-panel {
    grid-column: 1;
    grid-template-columns: 1fr;
  }

  .workspace.mode-camera .stage-panel,
  .workspace.mode-import .stage-panel {
    grid-column: 2;
  }

  .advanced-box {
    grid-column: 1 / -1;
  }
}

@media (max-width: 820px) {
  .app {
    padding: 12px;
  }

  .topbar,
  .brand,
  .top-actions,
  .workspace,
  .stage-header,
  .timeline-header {
    display: grid;
  }

  .entry-grid,
  .workspace,
  .mode-switcher,
  .side-panel {
    grid-template-columns: 1fr;
  }

  .workflow-hero {
    display: grid;
    gap: 12px;
  }

  .workflow-actions {
    width: 100%;
  }

  .workflow-actions button {
    flex: 1;
    min-width: 0;
  }

  .workspace.mode-camera,
  .workspace.mode-import {
    grid-template-columns: 1fr;
  }

  .workspace.mode-draw .tool-panel,
  .workspace.mode-draw .stage-panel,
  .workspace.mode-draw .side-panel,
  .workspace.mode-camera .stage-panel,
  .workspace.mode-camera .side-panel,
  .workspace.mode-import .stage-panel,
  .workspace.mode-import .side-panel {
    grid-column: 1;
    grid-row: auto;
  }

  .entry-grid {
    width: min(100%, 360px);
  }

  .entry-card {
    min-height: 130px;
  }

  .tool-panel {
    order: 2;
  }

  .stage-panel {
    order: 1;
  }

  .side-panel {
    order: 3;
  }

  .workspace.mode-camera .side-panel,
  .workspace.mode-import .side-panel {
    order: 1;
  }

  .workspace.mode-camera .stage-panel,
  .workspace.mode-import .stage-panel {
    order: 2;
  }

  .canvas-shell {
    min-height: 310px;
  }

  #drawCanvas {
    width: 100%;
    max-height: 52vh;
  }

  .tool-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .tool-button {
    min-height: 58px;
  }

  .frame-actions,
  .playback,
  .top-actions,
  .camera-actions {
    width: 100%;
  }

  .frame-actions button,
  .playback .primary-button,
  .top-actions button,
  .camera-actions button {
    flex: 1;
  }
}

@media (max-width: 520px) {
  h1 {
    font-size: 26px;
  }

  .start-copy h2 {
    font-size: 34px;
  }

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

  .mode-button {
    font-size: 15px;
  }

  .timeline-item {
    flex-basis: 94px;
  }

  .timeline-item img {
    width: 78px;
    height: 58px;
  }
}