:root {
  --ink: #101828;
  --muted: #526071;
  --paper: #f6f7fb;
  --card: #ffffff;
  --line: #d8deea;
  --accent: #3c4dcc;
  --accent-dark: #25348e;
  --wash: #e9ecff;
  --warning: #7a4b00;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
}

.masthead {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem clamp(1.25rem, 4vw, 4rem);
  border-bottom: 1px solid var(--line);
  background: rgba(255,255,255,.9);
}

.brand { color: var(--ink); font-weight: 750; text-decoration: none; }
.status { color: var(--muted); font-size: .85rem; }
main { width: min(1180px, calc(100% - 2rem)); margin: 0 auto; }

.hero { padding: 4.5rem 0 2.5rem; max-width: 850px; }
.eyebrow, .mini-label { color: var(--accent); font-weight: 800; letter-spacing: .08em; text-transform: uppercase; font-size: .76rem; }
h1 { font-size: clamp(2.7rem, 7vw, 5.5rem); line-height: .95; letter-spacing: -.055em; margin: .4rem 0 1.4rem; }
.lede { font-size: clamp(1.05rem, 2vw, 1.35rem); color: var(--muted); max-width: 760px; }
.boundary { border-left: 3px solid var(--accent); padding-left: 1rem; color: var(--warning); }

.workspace {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(0, 1.25fr);
  gap: 1.25rem;
  padding-bottom: 4rem;
}

.scenario-panel, .review-panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: clamp(1.2rem, 3vw, 2rem);
  box-shadow: 0 18px 50px rgba(30, 43, 82, .07);
}

label { display: block; font-weight: 700; margin-bottom: .5rem; }
select, textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  color: var(--ink);
  font: inherit;
  padding: .85rem;
}
textarea { resize: vertical; }
select:focus, textarea:focus { outline: 3px solid var(--wash); border-color: var(--accent); }
.domain { margin-top: 1.2rem; color: var(--accent-dark); font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: .85rem; }
.context { background: #f9faff; border-radius: 12px; padding: .9rem 1rem; }
.context ul { padding-left: 1.25rem; margin: 0; }
blockquote { margin: 1.2rem 0; border-left: 4px solid var(--accent); padding: .8rem 1rem; background: var(--wash); border-radius: 0 10px 10px 0; font-size: 1.05rem; }
.chips { display: flex; flex-wrap: wrap; gap: .45rem; }
.chip { background: var(--wash); color: var(--accent-dark); border-radius: 999px; padding: .35rem .65rem; font-size: .8rem; }
.checklist-header { display: flex; align-items: end; justify-content: space-between; gap: 1rem; margin: 1.8rem 0 .8rem; }
.checklist-header h2, .scenario-panel h2 { margin: .2rem 0 1rem; }
.checklist { display: grid; gap: .7rem; margin-bottom: 1.5rem; }
.check-item { border: 1px solid var(--line); border-radius: 12px; padding: .9rem; }
.check-item strong { display: block; }
.check-item p { margin: .2rem 0 .7rem; color: var(--muted); font-size: .92rem; }
.choice-row { display: flex; flex-wrap: wrap; gap: .45rem; }
.choice-row label { margin: 0; font-weight: 600; font-size: .86rem; border: 1px solid var(--line); border-radius: 999px; padding: .35rem .6rem; cursor: pointer; }
.choice-row input { margin-right: .25rem; }
.actions { display: flex; justify-content: space-between; align-items: center; gap: 1rem; margin-top: 1rem; }
.primary-button, .quiet-button { border: 0; border-radius: 9px; font: inherit; font-weight: 750; cursor: pointer; }
.primary-button { background: var(--accent); color: white; padding: .8rem 1rem; }
.quiet-button { background: var(--wash); color: var(--accent-dark); padding: .55rem .8rem; }
.actions a { color: var(--accent-dark); font-weight: 700; }
.research { padding: 0 0 4.5rem; }
.research > h2 { font-size: clamp(1.8rem, 4vw, 3rem); letter-spacing: -.03em; margin: .25rem 0 1.25rem; }
.research-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.research-card { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 1.4rem; }
.research-card h3 { margin: .25rem 0 .7rem; font-size: 1.25rem; }
.research-card p { color: var(--muted); }
.research-links { display: flex; flex-wrap: wrap; gap: 1rem; }
.research-links a { color: var(--accent-dark); font-weight: 750; }
.license-note { color: var(--muted); font-size: .85rem; margin-top: 1rem; }
footer { border-top: 1px solid var(--line); padding: 2rem clamp(1.25rem, 4vw, 4rem); color: var(--muted); font-size: .85rem; display: flex; justify-content: space-between; gap: 1rem; }

@media (max-width: 800px) {
  .workspace { grid-template-columns: 1fr; }
  .research-grid { grid-template-columns: 1fr; }
  .hero { padding-top: 3rem; }
  .actions, footer { align-items: flex-start; flex-direction: column; }
}