:root {
  --blue-primary: #233b6e;
  --blue-secondary: #2f5095;
  --blue-deep: #172647;
  --gold: #dfcc8c;
  --cream: #eadeb4;
  --light: #eff0f4;
  --ink: #172647;
  --muted: #bfc7d9;
  --radius: 16px;
  --portrait-filter: grayscale(100%);
  color-scheme: dark;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--blue-primary);
  color: var(--light);
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { min-width: 320px; scroll-behavior: smooth; }
body { margin: 0; min-height: 100vh; background: var(--blue-primary); line-height: 1.55; }
body.color-portraits { --portrait-filter: none; }
button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { min-height: 44px; }
a { color: var(--cream); text-underline-offset: .2em; }
a:hover { color: #fff; }
:focus-visible { outline: 3px solid var(--gold); outline-offset: 4px; }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0);
  white-space: nowrap; border: 0;
}
.skip-link { position: fixed; z-index: 20; top: 10px; left: 10px; padding: .65rem 1rem; background: var(--gold); color: var(--ink); transform: translateY(-150%); }
.skip-link:focus { transform: translateY(0); }

.site-header {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  max-width: 1180px; margin: 0 auto; padding: 1.1rem clamp(1rem, 4vw, 3rem);
}
.brand { display: inline-flex; gap: .7rem; align-items: center; color: var(--light); text-decoration: none; font-weight: 720; letter-spacing: -.02em; }
.brand-mark { width: 24px; height: 24px; border: 2px solid var(--gold); border-radius: 50%; position: relative; }
.brand-mark::after { content: ""; position: absolute; left: 5px; right: 5px; bottom: 5px; height: 4px; border-bottom: 2px solid var(--gold); border-radius: 50%; }

.screen { display: none; }
.screen.is-active { display: block; }
.welcome-screen, .summary-screen { max-width: 1180px; margin: 0 auto; padding: clamp(2rem, 7vw, 6rem) clamp(1rem, 4vw, 3rem); }
.welcome-layout { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(280px, .7fr); gap: clamp(2rem, 8vw, 7rem); align-items: center; }
.welcome-copy { max-width: 690px; }
.section-label { color: var(--gold); font-size: .75rem; font-weight: 760; letter-spacing: .13em; text-transform: uppercase; }
h1, h2 { line-height: 1.05; letter-spacing: -.045em; text-wrap: balance; }
h1 { margin: .45rem 0 1.4rem; font-family: Georgia, "Times New Roman", serif; font-size: clamp(3.8rem, 10vw, 8.5rem); font-weight: 500; }
h2 { font-size: clamp(1.8rem, 4vw, 3.1rem); font-weight: 680; }
.intro { max-width: 620px; font-size: clamp(1.15rem, 2vw, 1.4rem); }
.reassurance { max-width: 570px; color: var(--muted); }
.action-row { display: flex; flex-wrap: wrap; gap: .75rem; align-items: center; margin-top: 1.7rem; }
.primary-button, .secondary-button, .quiet-button, .text-button, .dialog-close {
  border: 0; border-radius: 999px; cursor: pointer; font-weight: 700; transition: transform 120ms ease, background 120ms ease, border-color 120ms ease;
}
.primary-button { padding: .85rem 1.25rem; background: var(--gold); color: var(--ink); }
.secondary-button { padding: .8rem 1.2rem; border: 1px solid rgba(239,240,244,.35); background: transparent; color: var(--light); }
.quiet-button { padding: .65rem .95rem; background: rgba(239,240,244,.08); color: var(--light); }
.text-button { padding: .2rem 0; min-height: 0; border-radius: 0; border-bottom: 1px solid currentColor; background: transparent; color: var(--cream); }
.primary-button:hover, .secondary-button:hover, .quiet-button:hover { transform: translateY(-1px); }
.asset-status { min-height: 1.5em; margin-top: 1rem; color: var(--muted); font-size: .82rem; }
.share-status { min-height: 1.5em; margin: .65rem 0 0; color: var(--cream); font-size: .85rem; }

.session-panel { padding: 1rem 0 1rem clamp(1rem, 3vw, 2rem); border-left: 1px solid rgba(239,240,244,.2); }
.session-panel h2 { margin-top: 0; font-size: 1.35rem; letter-spacing: -.02em; }
.session-options { display: grid; gap: .7rem; padding: 0; border: 0; }
.session-option { display: flex; gap: .8rem; align-items: center; min-height: 72px; padding: .85rem 1rem; border: 1px solid rgba(239,240,244,.17); border-radius: var(--radius); cursor: pointer; background: rgba(23,38,71,.25); }
.session-option:has(input:checked) { border-color: var(--gold); background: var(--blue-deep); }
.session-option input { accent-color: var(--gold); }
.session-option span { display: grid; }
.session-option small { color: var(--muted); }

.research-note { display: grid; grid-template-columns: .8fr 1.2fr; gap: 2rem; margin-top: clamp(4rem, 10vw, 8rem); padding-top: 2rem; border-top: 1px solid rgba(239,240,244,.2); }
.research-note h2 { margin: .4rem 0; font-family: Georgia, "Times New Roman", serif; font-weight: 500; }
.text-links { display: flex; flex-wrap: wrap; gap: .75rem 1.25rem; align-items: center; }
.text-links.stacked { display: grid; justify-items: start; }
.fine-print { color: var(--muted); font-size: .85rem; }

.game-screen { min-height: calc(100vh - 80px); padding: .5rem max(10px, env(safe-area-inset-right)) calc(1rem + env(safe-area-inset-bottom)) max(10px, env(safe-area-inset-left)); }
.game-header { width: min(100%, 680px); margin: 0 auto 1rem; display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
.round-progress { flex: 1; }
.round-progress p { margin: 0 0 .3rem; font-size: .85rem; color: var(--muted); font-variant-numeric: tabular-nums; }
.progress-track { height: 4px; overflow: hidden; background: rgba(239,240,244,.18); border-radius: 10px; }
.progress-track span { display: block; width: 0; height: 100%; background: var(--gold); transition: width 150ms ease; }
.game-actions { display: flex; gap: .4rem; }
.face-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: clamp(4px, 1vw, 10px); width: min(calc(100vw - 20px), calc(100vh - 150px), 680px); margin: auto; }
.face-button { position: relative; display: block; aspect-ratio: 1; min-height: 0; padding: 0; overflow: hidden; border: 2px solid transparent; border-radius: clamp(6px, 1.2vw, 13px); background: var(--blue-deep); cursor: pointer; transition: border-color 120ms ease, opacity 120ms ease, transform 120ms ease; }
.face-button img { display: block; width: 100%; height: 100%; object-fit: cover; filter: var(--portrait-filter); transform: scale(1.01); }
.face-button:hover { transform: translateY(-1px); }
.face-button.confirmed { border-color: var(--gold); }
.face-button.neutral-feedback { opacity: .72; }
.face-button:disabled { cursor: default; }
.game-screen.is-obscured .face-grid { filter: blur(18px); opacity: .25; pointer-events: none; }

.summary-screen { min-height: calc(100vh - 80px); display: none; place-items: center; }
.summary-screen.is-active { display: grid; }
.summary-card { width: min(100%, 920px); }
.summary-card h1 { font-size: clamp(3rem, 8vw, 6rem); }
.summary-message { font-size: 1.2rem; }
.summary-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin: 2rem 0; background: rgba(239,240,244,.2); }
.summary-stats div { padding: 1.2rem; background: var(--blue-primary); }
.summary-stats dt { color: var(--muted); font-size: .8rem; }
.summary-stats dd { margin: .4rem 0 0; font-family: Georgia, "Times New Roman", serif; font-size: clamp(1.7rem, 4vw, 2.8rem); }
.comparison { color: var(--cream); }
.share-panel { display: grid; grid-template-columns: minmax(220px, .9fr) minmax(300px, 1.1fr); gap: clamp(1.4rem, 4vw, 3rem); align-items: center; margin: clamp(2.5rem, 7vw, 5rem) 0 1.5rem; padding: clamp(1rem, 3vw, 1.5rem); border: 1px solid rgba(239,240,244,.2); border-radius: calc(var(--radius) + 4px); background: var(--blue-deep); }
.share-card-preview { display: block; width: 100%; border-radius: 10px; box-shadow: 0 14px 36px rgba(0,0,0,.22); }
.share-panel-copy h2 { margin: .35rem 0 .8rem; font-family: Georgia, "Times New Roman", serif; font-weight: 500; }
.share-panel-copy > p { margin: .65rem 0; }
.share-message-preview { padding: .85rem 1rem; border-left: 2px solid var(--gold); background: rgba(239,240,244,.06); color: var(--muted); font-size: .88rem; }
.share-message-preview strong { color: var(--light); }
.share-message-preview span { color: var(--cream); }
.share-actions { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 1rem; }
.share-note { color: var(--muted); font-size: .78rem; }
.summary-actions { margin-top: 2rem; padding-top: 1.5rem; border-top: 1px solid rgba(239,240,244,.2); }

.site-footer { display: grid; grid-template-columns: 1fr 1.4fr .8fr; gap: 2rem; padding: 2.5rem max(1rem, calc((100vw - 1120px) / 2)); background: var(--blue-deep); color: var(--muted); font-size: .8rem; }
.site-footer strong { color: var(--light); }
.site-footer p { margin: .4rem 0; }
.site-footer nav { display: grid; align-content: start; gap: .45rem; }
body.playing .site-footer { display: none; }
body.playing .site-header { display: none; }

dialog { width: min(92vw, 660px); max-height: min(88vh, 780px); padding: 0; border: 1px solid rgba(239,240,244,.25); border-radius: 20px; background: var(--blue-deep); color: var(--light); box-shadow: 0 24px 80px rgba(0,0,0,.35); }
dialog::backdrop { background: rgba(9,17,35,.78); backdrop-filter: blur(4px); }
.dialog-content { position: relative; padding: clamp(1.5rem, 5vw, 3.5rem); }
.dialog-content h2 { margin-top: .5rem; }
.dialog-close { position: absolute; top: .8rem; right: .8rem; padding: .5rem .8rem; background: transparent; color: var(--muted); }
.settings-fieldset { display: grid; gap: .8rem; margin: 1.5rem 0; padding: 1rem; border: 1px solid rgba(239,240,244,.2); border-radius: 12px; }
.settings-fieldset label { min-height: 44px; display: flex; align-items: center; gap: .6rem; }
.settings-fieldset input { accent-color: var(--gold); }

.review-screen { max-width: 1400px; margin: 0 auto; padding: 3rem 1rem 5rem; }
.review-intro h1 { font-size: clamp(3rem, 7vw, 6rem); }
.review-grid { display: grid; gap: 1rem; }
.review-card { padding: 1rem; border: 1px solid rgba(239,240,244,.2); border-radius: var(--radius); background: var(--blue-deep); }
.review-card h2 { font-size: 1rem; letter-spacing: 0; }
.review-pair { display: grid; grid-template-columns: repeat(4, 1fr); gap: .6rem; }
.review-image { margin: 0; }
.review-image img { display: block; width: 100%; aspect-ratio: 1; object-fit: cover; border-radius: 8px; background: var(--blue-primary); }
.review-image.is-gray img { filter: grayscale(100%); }
.review-image figcaption { margin-top: .25rem; color: var(--muted); font-size: .7rem; }
.review-missing { color: var(--gold); }

@media (max-width: 760px) {
  .site-header { padding: .8rem 1rem; }
  .site-header .quiet-button { font-size: .78rem; }
  .welcome-layout, .research-note, .site-footer { grid-template-columns: 1fr; }
  .welcome-screen, .summary-screen { padding-top: 2.5rem; }
  h1 { font-size: clamp(3.5rem, 18vw, 5.2rem); }
  .session-panel { padding: 1.5rem 0 0; border-left: 0; border-top: 1px solid rgba(239,240,244,.2); }
  .game-header { margin-bottom: .55rem; }
  .game-actions .quiet-button { padding: .5rem .6rem; font-size: .74rem; }
  .face-grid { width: min(calc(100vw - 20px), calc(100vh - 125px)); }
  .summary-stats { grid-template-columns: 1fr; }
  .share-panel { grid-template-columns: 1fr; }
  .review-pair { grid-template-columns: repeat(2, 1fr); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.001ms !important; animation-duration: 0.001ms !important; }
}