:root {
  color-scheme: dark;
  --stones-bg: #101511;
  --stones-panel: rgba(244, 238, 220, 0.1);
  --stones-panel-strong: rgba(244, 238, 220, 0.16);
  --stones-line: rgba(244, 238, 220, 0.22);
  --stones-text: #f6f1e5;
  --stones-muted: #cfc5aa;
  --stones-accent: #d9a441;
  --stones-calm: #7eb7a4;
  --stones-danger: #f0a083;
}

body.stepping-stones-app {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(126, 183, 164, 0.2), transparent 32rem),
    linear-gradient(135deg, #101511 0%, #17211d 48%, #281e14 100%);
  color: var(--stones-text);
}

.stepping-stones-app .app-header {
  position: sticky;
  top: 0;
  z-index: 5;
  border-bottom: 1px solid var(--stones-line);
  background: rgba(16, 21, 17, 0.86);
  backdrop-filter: blur(18px);
}

.stepping-stones-app .app-nav,
.stones-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.stepping-stones-app .app-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 68px;
}

.stepping-stones-app a {
  color: inherit;
}

.brand-mark {
  font-weight: 800;
  letter-spacing: 0.08em;
  text-decoration: none;
}

.nav-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.nav-actions a,
.view-tabs button,
.compact-actions button,
.primary-action,
.secondary-action,
.danger-action {
  min-height: 44px;
  border: 1px solid var(--stones-line);
  border-radius: 8px;
  padding: 10px 14px;
  background: rgba(244, 238, 220, 0.1);
  color: var(--stones-text);
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}

.primary-action {
  background: var(--stones-accent);
  color: #18120a;
}

.secondary-action {
  display: inline-flex;
  align-items: center;
}

.danger-action {
  border-color: rgba(240, 160, 131, 0.55);
  color: #ffe1d4;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 8px;
  z-index: 10;
  padding: 10px;
  background: #fff;
  color: #111;
}

.skip-link:focus {
  left: 8px;
}

.stones-shell {
  display: grid;
  gap: 18px;
  padding: 28px 0 48px;
}

.hero-panel,
.setup-panel,
.view-panel,
.danger-zone,
.status-row {
  border: 1px solid var(--stones-line);
  border-radius: 8px;
  background: var(--stones-panel);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.24);
}

.hero-panel {
  padding: clamp(24px, 5vw, 52px);
}

.hero-panel h1 {
  max-width: 880px;
  margin: 0;
  font-size: clamp(2.4rem, 6vw, 5rem);
  line-height: 0.98;
}

.hero-copy {
  max-width: 720px;
  font-size: clamp(1.05rem, 2.3vw, 1.35rem);
  line-height: 1.55;
  color: var(--stones-muted);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--stones-calm);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero-actions,
.compact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

input[type="file"] {
  max-width: 100%;
}

.boundary-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  padding: 0;
  margin: 26px 0 0;
  list-style: none;
}

.boundary-list li,
.gentle-note,
.read-block,
.progress-pill,
.safety-lock {
  border: 1px solid var(--stones-line);
  border-radius: 8px;
  background: rgba(16, 21, 17, 0.32);
  padding: 12px;
}

.status-row {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 18px;
  color: var(--stones-muted);
}

.setup-panel,
.danger-zone {
  display: grid;
  grid-template-columns: minmax(220px, 0.7fr) minmax(0, 1.3fr);
  gap: 22px;
  padding: 22px;
}

.danger-zone {
  align-items: center;
}

.setup-panel h2,
.section-heading h2,
.danger-zone h2 {
  margin: 0 0 8px;
  font-size: clamp(1.35rem, 3vw, 2rem);
}

.setup-grid,
.stone-fields {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

label {
  display: grid;
  gap: 7px;
  color: var(--stones-muted);
  font-weight: 700;
}

.wide,
.checkbox-line {
  grid-column: 1 / -1;
}

.checkbox-line {
  display: flex;
  align-items: center;
}

input,
select,
textarea {
  width: 100%;
  box-sizing: border-box;
  border: 1px solid rgba(244, 238, 220, 0.26);
  border-radius: 8px;
  padding: 11px 12px;
  background: rgba(9, 13, 11, 0.82);
  color: var(--stones-text);
  font: inherit;
}

textarea {
  resize: vertical;
  line-height: 1.45;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--stones-accent);
  outline-offset: 3px;
}

.view-tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 2px;
}

.view-tabs button {
  white-space: nowrap;
}

.view-tabs button.is-active {
  background: var(--stones-calm);
  color: #071310;
}

.view-panel {
  display: none;
  padding: 22px;
}

.view-panel.is-active {
  display: block;
}

.section-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 16px;
}

.stone-editor {
  display: grid;
  gap: 10px;
}

.stone-card {
  border: 1px solid var(--stones-line);
  border-radius: 8px;
  background: rgba(244, 238, 220, 0.08);
}

.stone-card summary {
  display: grid;
  grid-template-columns: 90px 1fr auto;
  gap: 12px;
  align-items: center;
  min-height: 58px;
  padding: 12px 14px;
  cursor: pointer;
}

.stone-card summary strong {
  font-size: 1.02rem;
}

.stone-card summary em {
  color: var(--stones-calm);
  font-style: normal;
  font-weight: 700;
}

.stone-fields {
  padding: 0 14px 16px;
}

.grouped-pathway,
.coach-view,
.academy-view {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.pathway-group,
.coach-card,
.academy-group,
.academy-summary,
.learner-card {
  border: 1px solid var(--stones-line);
  border-radius: 8px;
  padding: 16px;
  background: rgba(244, 238, 220, 0.08);
}

.pathway-group h3,
.coach-card h3,
.academy-group h3,
.learner-card h3 {
  margin-top: 0;
}

.pathway-group ol {
  display: grid;
  gap: 8px;
  padding-left: 22px;
}

.pathway-group li {
  padding: 8px 0;
}

.pathway-group li span {
  display: block;
  color: var(--stones-calm);
  font-size: 0.92rem;
}

.stone-picker {
  min-width: min(320px, 100%);
}

.learner-card {
  max-width: 820px;
}

.read-block {
  margin: 10px 0;
}

.read-block p {
  margin: 6px 0 0;
  color: var(--stones-muted);
}

.progress-pill,
.safety-lock {
  display: inline-block;
  margin: 8px 0;
  color: var(--stones-text);
}

.safety-lock {
  border-color: rgba(240, 160, 131, 0.6);
}

.academy-group section {
  border-top: 1px solid var(--stones-line);
  padding-top: 12px;
  margin-top: 12px;
}

.review-output {
  min-height: 380px;
  margin-top: 14px;
  font-family: Consolas, "Courier New", monospace;
}

@media (max-width: 860px) {
  .boundary-list,
  .setup-panel,
  .danger-zone,
  .setup-grid,
  .stone-fields,
  .grouped-pathway,
  .coach-view,
  .academy-view {
    grid-template-columns: 1fr;
  }

  .section-heading,
  .status-row,
  .stepping-stones-app .app-nav {
    align-items: stretch;
    flex-direction: column;
  }

  .stone-card summary {
    grid-template-columns: 1fr;
  }
}