:root {
  color-scheme: dark;
  --ink: #f4f0e8;
  --muted: #9eb0c1;
  --deep: #07101c;
  --surface: #0e1a2a;
  --surface-2: #132238;
  --line: #29405a;
  --gold: #d6b877;
  --teal: #6bb9a8;
  --red: #e07b73;
  --shadow: 0 24px 70px rgba(0, 0, 0, .28);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html { background: var(--deep); scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 14%, rgba(56, 105, 133, .23), transparent 34rem),
    radial-gradient(circle at 88% 76%, rgba(214, 184, 119, .10), transparent 28rem),
    var(--deep);
}

button, input { font: inherit; }
button { cursor: pointer; }
button:focus-visible, input:focus-visible, a:focus-visible { outline: 3px solid var(--gold); outline-offset: 4px; }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 82px;
  padding: .65rem clamp(1rem, 4vw, 4.5rem);
  border-bottom: 1px solid rgba(158, 176, 193, .16);
}

.brand { display: inline-flex; align-items: center; gap: .75rem; color: var(--ink); text-decoration: none; }
.brand-copy { min-width: 0; }
.brand strong, .brand small { display: block; }
.brand strong { letter-spacing: .08em; }
.brand small { margin-top: .2rem; color: var(--muted); font-size: .7rem; letter-spacing: .06em; }

.logo-frame {
  position: relative;
  display: block;
  width: 236px;
  height: 60px;
  flex: 0 0 236px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, .72);
  border-radius: 12px;
  background: #fff;
  box-shadow: 0 10px 28px rgba(0, 0, 0, .2);
}
.logo-frame img {
  position: absolute;
  top: -113px;
  left: -32px;
  width: 289px;
  max-width: none;
  height: auto;
}
.logo-frame-header { display: none; }
.entry-branding { display: grid; gap: .75rem; justify-items: start; margin-bottom: 1.6rem; }
.brand-composition { margin: 0; color: var(--ink); font-size: .82rem; letter-spacing: .04em; }
.brand-composition strong { color: var(--gold); }
.brand-composition span { color: var(--muted); }

.status-chip, .health-badge {
  border: 1px solid rgba(214, 184, 119, .5);
  border-radius: 999px;
  padding: .45rem .8rem;
  color: var(--gold);
  font-size: .69rem;
  font-weight: 750;
  letter-spacing: .12em;
}

.safety-rail {
  display: flex;
  gap: .7rem 1.4rem;
  flex-wrap: wrap;
  padding: .65rem clamp(1rem, 4vw, 4.5rem);
  color: #bfd0de;
  background: rgba(19, 34, 56, .72);
  border-bottom: 1px solid var(--line);
  font-size: .67rem;
  letter-spacing: .1em;
}

main { width: min(1440px, 100%); margin: 0 auto; }
.page { min-height: calc(100vh - 186px); padding: clamp(2.25rem, 7vw, 6rem) clamp(1.1rem, 5vw, 5rem); }
.page[hidden] { display: none !important; }
.page-entry { display: grid; gap: 2.5rem; align-items: center; }
.eyebrow, .step-label { color: var(--gold); font-size: .72rem; font-weight: 800; letter-spacing: .14em; }
h1, h2, p { margin-top: 0; }
h1 { max-width: 18ch; margin-bottom: 1.4rem; font: 500 clamp(2.5rem, 7vw, 5.8rem)/.98 Georgia, serif; letter-spacing: -.035em; }
h1 em { color: var(--gold); font-weight: 400; }
h2 { font: 500 clamp(1.45rem, 3vw, 2.15rem)/1.15 Georgia, serif; }
.lede { max-width: 62ch; color: #c3d0db; font-size: clamp(1rem, 2vw, 1.24rem); line-height: 1.7; }

.boundary-grid { display: grid; gap: .8rem; margin-top: 2.2rem; }
.boundary-grid article { padding: 1rem 1.1rem; border-left: 2px solid var(--gold); background: rgba(19, 34, 56, .54); }
.boundary-grid strong, .boundary-grid span { display: block; }
.boundary-grid strong { margin-bottom: .35rem; }
.boundary-grid span { color: var(--muted); font-size: .83rem; }

.ack-card, .panel-card, .chart-card, .explanation-card, .scenario-card {
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(14, 26, 42, .92);
  box-shadow: var(--shadow);
}
.ack-card { padding: clamp(1.5rem, 4vw, 2.6rem); }
.ack-card ul { padding-left: 1.25rem; color: #c5d1db; line-height: 1.65; }
.acknowledgement { display: flex; gap: .75rem; align-items: flex-start; margin: 1.6rem 0; padding: 1rem; background: #101f31; border-radius: 12px; }
.acknowledgement input { width: 1.2rem; height: 1.2rem; accent-color: var(--gold); }

.primary-button, .secondary-button, .text-button {
  min-height: 48px;
  border-radius: 999px;
  padding: .8rem 1.25rem;
  font-weight: 750;
}
.primary-button { border: 1px solid var(--gold); color: #111821; background: var(--gold); }
.primary-button:disabled { opacity: .4; cursor: not-allowed; }
.secondary-button { border: 1px solid #54708b; color: var(--ink); background: transparent; }
.text-button { min-height: auto; border: 0; color: var(--muted); background: transparent; padding-left: 0; }

.page-heading { margin-bottom: 2.5rem; }
.page-heading h1, .decision-heading h1, .page-completion h1 { font-size: clamp(2.2rem, 5vw, 4.4rem); }
.page-heading p { max-width: 58ch; color: var(--muted); }
.scenario-list { display: grid; gap: 1.2rem; }
.scenario-card { display: grid; gap: 1.25rem; padding: clamp(1.4rem, 4vw, 2rem); }
.scenario-card h2 { margin-bottom: .55rem; }
.scenario-card p { color: var(--muted); line-height: 1.55; }
.scenario-tags { display: flex; flex-wrap: wrap; gap: .55rem; }
.scenario-tags span { padding: .4rem .65rem; border-radius: 999px; background: #172a40; color: #bfd0de; font-size: .72rem; }

.decision-heading { display: grid; gap: 1.25rem; margin-bottom: 2rem; }
.scenario-meta { color: var(--muted); }
.decision-grid { display: grid; gap: 1.25rem; }
.chart-card { margin: 0; overflow: hidden; }
.chart-card img { display: block; width: 100%; height: auto; }
.chart-card figcaption { padding: .85rem 1.1rem; color: var(--muted); font-size: .75rem; border-top: 1px solid var(--line); }
.panel-card { padding: clamp(1.2rem, 3vw, 2rem); }
.panel-title-row { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; padding-bottom: 1rem; border-bottom: 1px solid var(--line); }
.panel-title-row h2 { margin-bottom: 0; }
.panel-rows { display: grid; }
.panel-section { margin-top: 1.4rem; color: var(--gold); font-size: .68rem; letter-spacing: .12em; }
.panel-row { display: grid; grid-template-columns: minmax(8rem, .8fr) 1.4fr; gap: 1rem; padding: .72rem 0; border-bottom: 1px solid rgba(41, 64, 90, .55); }
.panel-row dt { color: var(--muted); font-size: .8rem; }
.panel-row dd { margin: 0; font-size: .84rem; line-height: 1.45; }

.explanation-card { margin-top: 1.25rem; padding: clamp(1.4rem, 4vw, 2.3rem); }
.explanation { max-width: 78ch; color: #d2dce5; font: 400 clamp(1.05rem, 2vw, 1.3rem)/1.65 Georgia, serif; }
.companion-items { display: grid; gap: .75rem; margin-top: 1.25rem; }
.companion-item { padding: 1rem; border-left: 2px solid var(--teal); background: #101f31; }
.companion-item strong, .companion-item span { display: block; }
.companion-item span { margin-top: .35rem; color: var(--muted); font-size: .84rem; line-height: 1.5; }
.page-actions, .completion-actions { display: flex; flex-wrap: wrap; gap: 1rem; align-items: center; margin-top: 1.5rem; }

.page-completion { display: grid; align-content: center; justify-items: start; max-width: 980px; }
.completion-branding { margin-bottom: 1.5rem; }
.completion-mark { display: grid; place-items: center; width: 70px; height: 70px; margin-bottom: 1.5rem; border: 1px solid var(--teal); border-radius: 50%; color: var(--teal); font-size: 2rem; }
.page-completion > p:not(.step-label) { max-width: 65ch; color: var(--muted); font-size: 1.08rem; line-height: 1.7; }
.page-completion .completion-boundary { color: #d9c28f; font-size: .72rem; font-weight: 800; letter-spacing: .1em; }
.organizer-note { max-width: 34rem; margin: 0; color: var(--muted); font-size: .82rem; }

footer { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; padding: 1.2rem clamp(1rem, 4vw, 4.5rem); color: #7890a6; border-top: 1px solid rgba(158, 176, 193, .13); font-size: .7rem; }

@media (min-width: 700px) {
  .boundary-grid { grid-template-columns: repeat(3, 1fr); }
  .scenario-card { grid-template-columns: 1fr auto; align-items: center; }
  .decision-heading { grid-template-columns: auto 1fr; align-items: start; }
}

@media (min-width: 900px) {
  .page-entry { grid-template-columns: minmax(0, 1.25fr) minmax(340px, .75fr); }
  .decision-grid { grid-template-columns: minmax(0, 1.18fr) minmax(360px, .82fr); align-items: start; }
}

@media (min-width: 1100px) {
  .logo-frame-header { display: block; }
}

@media (max-width: 560px) {
  .site-header { min-height: 70px; }
  .brand small { max-width: 15rem; font-size: .64rem; }
  .status-chip { display: none; }
  .safety-rail { gap: .45rem .8rem; font-size: .58rem; }
  .page { padding-top: 2.5rem; }
  .panel-row { grid-template-columns: 1fr; gap: .25rem; }
  .page-actions .primary-button, .page-actions .secondary-button { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}