:root {
  color: #17211d;
  background: #f6f4ec;
  font-family: ui-rounded, "Hiragino Maru Gothic ProN", "Hiragino Sans",
    "Yu Gothic", Meiryo, sans-serif;
  line-height: 1.5;
}

* { box-sizing: border-box; }
body { margin: 0; }
button, input, textarea { font: inherit; }
.studio-shell { width: min(100% - 2rem, 78rem); margin: 0 auto; padding: 2rem 0 4rem; }
.studio-header { display: grid; grid-template-columns: minmax(0, 1fr) minmax(16rem, 26rem); gap: 2rem; align-items: end; padding: 1rem 0 2.5rem; }
.wordmark { color: #154d3e; font-size: 1.4rem; font-weight: 800; text-decoration: none; }
.eyebrow { margin: 2.5rem 0 .3rem; color: #557269; font-weight: 750; text-transform: uppercase; font-size: .76rem; letter-spacing: .08em; }
h1, h2 { margin-top: 0; font-family: ui-serif, "Hiragino Mincho ProN", "Yu Mincho", serif; text-wrap: balance; }
h1 { margin-bottom: .45rem; font-size: clamp(2.4rem, 6vw, 4.5rem); line-height: 1.05; }
h2 { margin-bottom: .25rem; font-size: clamp(1.35rem, 2vw, 1.75rem); }
.lede { max-width: 42rem; margin: 0; font-size: 1.08rem; }
.memory-notice { margin: 0; padding: 1rem 1.15rem; border: 1px solid #c97c24; border-radius: .85rem; background: #fff3df; }
.workspace { display: grid; grid-template-columns: minmax(15rem, .72fr) minmax(22rem, 1.28fr); gap: 1rem; }
.variant-panel, .editor-panel, .preview-panel { border-radius: 1rem; background: #fff; box-shadow: 0 12px 32px #1d292214; padding: clamp(1rem, 2.4vw, 1.5rem); }
.variant-panel { grid-row: span 2; }
.preview-panel { min-width: 0; }
.panel-heading { display: flex; justify-content: space-between; align-items: flex-start; gap: 1rem; }
.variant-count, .selected-name, .fork-lineage, .preview-note, .limit-copy { margin: 0; color: #58675e; }
.fork-lineage { margin-top: .2rem; color: #315f50; font-size: .9rem; overflow-wrap: anywhere; }
.limit-copy { margin-top: .75rem; font-size: .9rem; }
.variant-list { display: grid; gap: .55rem; margin: 1rem 0 1.25rem; }
.variant-tab { width: 100%; display: flex; justify-content: space-between; gap: .75rem; align-items: center; padding: .8rem .9rem; border: 1px solid #789284; border-radius: .7rem; background: #f7faf7; color: #183d31; cursor: pointer; text-align: left; }
.variant-tab[aria-selected="true"] { border-color: #154d3e; background: #dceadb; box-shadow: inset 4px 0 #154d3e; font-weight: 800; }
.variant-tab small { color: #58675e; font-weight: 500; }
.rename-form { display: grid; gap: .4rem; padding-top: 1rem; border-top: 1px solid #d7dfda; }
.inline-controls { display: flex; gap: .55rem; }
input[type="text"], input[type="url"] { min-width: 0; flex: 1; padding: .65rem .7rem; border: 1px solid #84958c; border-radius: .55rem; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 2.7rem; padding: .6rem .85rem; border: 1px solid transparent; border-radius: .6rem; cursor: pointer; font-weight: 750; text-align: center; text-decoration: none; }
.button:disabled { opacity: .55; cursor: not-allowed; }
.button-primary { color: #fff; background: #154d3e; }
.button-secondary { color: #154d3e; background: #fff; border-color: #477762; }
.button-danger { width: 100%; margin-top: .75rem; color: #8c2020; background: #fff; border-color: #b75a5a; }
.button:focus-visible, .variant-tab:focus-visible, a:focus-visible, input:focus-visible, textarea:focus-visible, iframe:focus-visible { outline: 3px solid #d06d00; outline-offset: 3px; }
.import-controls { flex: 0 0 auto; }
#html-editor { width: 100%; min-height: 23rem; margin-top: 1rem; resize: vertical; padding: .9rem; border: 1px solid #84958c; border-radius: .7rem; background: #fcfdfb; font: .9rem/1.55 ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace; tab-size: 2; }
.editor-actions { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-top: .7rem; }
.editor-status, .preview-status, .studio-status, .region-status { min-height: 1.5rem; margin: 0; font-weight: 650; }
.editor-status.is-error, .preview-status.is-error, .studio-status.is-error, .region-status.is-error { color: #8c2020; }
.editor-status.is-warning { color: #7b4b07; }
#html-preview { width: 100%; min-height: 19rem; margin-top: .6rem; border: 1px solid #84958c; border-radius: .7rem; background: #fff; }
.share-workflow { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; margin-top: 1rem; }
.workflow-card { min-width: 0; border-radius: 1rem; background: #fff; box-shadow: 0 12px 32px #1d292214; padding: clamp(1rem, 2.4vw, 1.5rem); }
.workflow-card > p { color: #536158; }
.workflow-form { display: grid; gap: .4rem; }
.region-status { margin-top: .75rem; }
.confirmation-panel, .publication-result { margin-top: 1rem; padding: 1rem; border-radius: .75rem; }
.confirmation-panel h3, .publication-result h3 { margin: 0 0 .5rem; }
.publish-card { grid-column: 1 / -1; }
.confirmation-panel { border: 2px solid #154d3e; background: #f4f8f4; }
.confirmation-panel dl { display: grid; gap: .45rem; margin: .8rem 0; }
.confirmation-panel dl div { display: grid; grid-template-columns: 7rem minmax(0, 1fr); gap: .5rem; }
.confirmation-panel dt { font-weight: 800; }
.confirmation-panel dd { margin: 0; overflow-wrap: anywhere; }
.confirmation-checkbox { display: flex; align-items: flex-start; gap: .55rem; margin: 1rem 0; font-weight: 700; }
.confirmation-checkbox input { flex: 0 0 auto; margin-top: .28rem; }
.confirmation-actions { display: flex; flex-wrap: wrap; gap: .65rem; }
.publication-result { border: 1px solid #4d866d; background: #ecf6ee; }
.publication-result label { display: block; margin-bottom: .35rem; font-weight: 750; }
.publication-result input { display: block; width: 100%; margin-bottom: .75rem; }
.studio-status { margin-top: 1rem; }
.boundary-note { margin: 1.25rem auto 0; max-width: 52rem; color: #536158; text-align: center; }
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

@media (max-width: 52rem) {
  .studio-shell { width: min(100% - 1.25rem, 78rem); padding-top: 1rem; }
  .studio-header, .workspace, .share-workflow { grid-template-columns: 1fr; }
  .studio-header { gap: 1.25rem; }
  .variant-panel { grid-row: auto; }
  .panel-heading, .editor-actions { align-items: stretch; flex-direction: column; }
  .panel-heading .button, .editor-actions .button, .import-controls .button { width: 100%; }
  .inline-controls { flex-direction: column; }
  .publish-card { grid-column: auto; }
  .confirmation-actions { flex-direction: column; }
  #html-editor { min-height: 18rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; }
}