:root {
  color-scheme: light;
  --bg: #f4f6f8;
  --panel: #fff;
  --ink: #182230;
  --muted: #667085;
  --line: #d7dde7;
  --soft: #edf2f7;
  --green: #19715f;
  --green-soft: #e2f1ed;
  --blue: #2d5f9a;
  --blue-soft: #e8f0fb;
  --amber: #8a5a00;
  --amber-soft: #fff3d8;
  --red: #9f2f38;
  --red-soft: #fde7e9;
  --shadow: 0 16px 40px rgba(24, 34, 48, 0.08);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--ink);
  background: linear-gradient(180deg, #edf5f1 0, #f4f6f8 260px), var(--bg);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button, input, select, textarea { font: inherit; }

.shell {
  width: min(1440px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 24px 0 44px;
}

.hero { padding: 8px 0 18px; }

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
  margin-bottom: 22px;
}

.nav a {
  color: var(--ink);
  text-decoration: none;
  background: rgba(255,255,255,.85);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 8px 10px;
  font-size: 14px;
}

.eyebrow, h1, h2, h3, p { margin-top: 0; }

.eyebrow {
  margin-bottom: 8px;
  color: var(--green);
  font-size: 13px;
  font-weight: 850;
}

h1 {
  margin-bottom: 10px;
  font-size: clamp(34px, 5vw, 58px);
  line-height: .98;
  letter-spacing: 0;
}

.subtitle {
  max-width: 840px;
  margin-bottom: 0;
  color: #475467;
  font-size: 18px;
  line-height: 1.55;
}

.toolbar {
  display: grid;
  grid-template-columns: minmax(260px, 1fr) 180px 130px 180px auto;
  gap: 10px;
  align-items: end;
  padding: 12px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

input, select, textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--ink);
  background: #fff;
}

input, select {
  min-height: 40px;
  padding: 8px 10px;
}

textarea {
  resize: vertical;
  padding: 10px;
  line-height: 1.45;
}

button {
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 8px 11px;
  color: var(--ink);
  background: #fff;
  cursor: pointer;
}

button:hover, .nav a:hover { border-color: #9eb2c8; }

.stats {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
  margin: 14px 0;
}

.stat, .paths, .scenarioPanel, .detailPanel, .practice {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.stat {
  min-height: 76px;
  padding: 13px;
}

.stat strong {
  display: block;
  font-size: 25px;
  line-height: 1.05;
}

.stat span {
  display: block;
  margin-top: 5px;
  color: var(--muted);
  font-size: 12px;
}

.sectionHead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 15px;
  border-bottom: 1px solid var(--line);
  background: #fbfcfe;
}

.sectionHead h2 { margin: 0; font-size: 16px; }
.sectionHead span { color: var(--muted); font-size: 12px; }
.sectionHead.compact { min-height: 52px; }

.pathList {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  padding: 12px;
}

.pathCard, .scenarioCard, .practiceCard {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.pathCard {
  padding: 12px;
  text-align: left;
}

.pathCard.active {
  border-color: var(--green);
  box-shadow: 0 0 0 2px rgba(25,113,95,.14);
}

.pathCard h3, .scenarioCard h3, .practiceCard h3 {
  margin: 0 0 7px;
  font-size: 17px;
}

.pathCard p, .scenarioCard p {
  margin-bottom: 10px;
  color: #475467;
  line-height: 1.45;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 430px;
  gap: 14px;
  align-items: start;
  margin-top: 14px;
}

.detailPanel {
  position: sticky;
  top: 14px;
  overflow: hidden;
}

.scenarioList {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  padding: 12px;
}

.scenarioCard {
  padding: 12px;
  text-align: left;
}

.scenarioCard.active {
  border-color: var(--green);
  box-shadow: 0 0 0 2px rgba(25,113,95,.14);
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.chip {
  display: inline-flex;
  align-items: center;
  min-height: 22px;
  border-radius: 999px;
  padding: 2px 8px;
  color: var(--blue);
  background: var(--blue-soft);
  font-size: 12px;
  font-weight: 750;
}

.chip.level { color: var(--amber); background: var(--amber-soft); }
.chip.must { color: var(--green); background: var(--green-soft); }

.detailContent {
  padding: 15px;
  line-height: 1.55;
}

.detailTitle {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.detailTitle h3 {
  margin: 0;
  font-size: 25px;
  line-height: 1.1;
}

.block {
  padding: 12px 0;
  border-top: 1px solid var(--soft);
}

.block h4 {
  margin: 0 0 7px;
  color: var(--muted);
  font-size: 13px;
  text-transform: uppercase;
}

.block p, .block ul, .block ol { margin: 0; }
.block ul, .block ol { padding-left: 20px; }
.block li + li { margin-top: 4px; }

.dialogue {
  display: grid;
  gap: 6px;
  padding: 10px;
  border-radius: 7px;
  background: #f8fafc;
}

.dialogue + .dialogue { margin-top: 8px; }

.warning {
  padding: 10px;
  color: var(--red);
  background: var(--red-soft);
  border-radius: 7px;
}

.practice {
  margin-top: 14px;
  overflow: hidden;
}

.practiceList {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  padding: 12px;
}

.practiceCard {
  padding: 12px;
}

.practiceCard p { color: #475467; line-height: 1.45; }

.practiceAnswer {
  display: none;
  margin-top: 8px;
  padding: 9px;
  border-radius: 7px;
  background: var(--green-soft);
  color: var(--green);
}

.practiceAnswer.show { display: block; }

.expressionBox {
  display: grid;
  gap: 10px;
  padding: 12px;
  border-top: 1px solid var(--line);
}

.draftOutput {
  min-height: 40px;
  padding: 10px;
  border: 1px solid var(--soft);
  border-radius: 7px;
  background: #fbfcfe;
  color: #344054;
  line-height: 1.5;
}

.empty {
  grid-column: 1 / -1;
  padding: 28px;
  color: var(--muted);
  text-align: center;
}

@media (max-width: 1100px) {
  .toolbar, .workspace { grid-template-columns: 1fr; }
  .detailPanel { position: static; }
  .pathList, .practiceList { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 760px) {
  .shell { width: min(100vw - 20px, 1440px); padding-top: 12px; }
  h1 { font-size: 36px; }
  .subtitle { font-size: 15px; }
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .pathList, .scenarioList, .practiceList { grid-template-columns: 1fr; }
  .sectionHead { align-items: flex-start; flex-direction: column; }
}