/* The Attention Gap — dark editorial theme.
   Palette: validated against dark surfaces #1a1a19 / #0d0d0d (see dataviz notes). */

:root {
  color-scheme: dark;
  --page: #0d0d0d;
  --surface: #1a1a19;
  --ink: #ffffff;
  --ink-2: #c3c2b7;
  --muted: #898781;
  --hair: #2c2c2a;
  --baseline: #383835;
  --border: rgba(255, 255, 255, 0.10);
  --felt: #3987e5;      /* self-reported salience */
  --measured: #c98500;  /* measured direct exposure */
  --highlight: #d55181; /* highlighted athletes in the dot field */
  --dot: #414140;       /* the recessive mass */
  --sans: system-ui, -apple-system, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: auto; }
body {
  margin: 0;
  background: var(--page);
  color: var(--ink-2);
  font: 17px/1.65 var(--sans);
  -webkit-font-smoothing: antialiased;
  text-wrap: pretty;
}

h1, h2, h3 { color: var(--ink); line-height: 1.15; margin: 0 0 0.5em; text-wrap: balance; }
h2 { font-size: clamp(1.7rem, 4vw, 2.4rem); letter-spacing: -0.015em; }
h2:focus { outline: none; }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1em; }
a { color: var(--ink-2); }
code { font-size: 0.85em; color: var(--muted); }

.stage {
  max-width: 680px;
  margin: 0 auto;
  padding: 5.5rem 1.25rem;
}
.stage.wide { max-width: 880px; }

.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  clip-path: inset(50%); overflow: hidden; white-space: nowrap;
}

/* ── Hero ─────────────────────────────────────────────────────────────── */
.hero { min-height: 88vh; display: flex; flex-direction: column; justify-content: center; padding-top: 4rem; }
.kicker {
  font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 1.4rem;
}
.hero h1 {
  font-size: clamp(2.7rem, 8vw, 4.6rem);
  font-weight: 750; letter-spacing: -0.03em; margin-bottom: 0.35em;
}
.tagline { font-size: clamp(1.1rem, 2.6vw, 1.35rem); color: var(--ink); margin-bottom: 1.6rem; }
.intro p { max-width: 60ch; }
.privacy-note { color: var(--muted); font-size: 0.85rem; margin-top: 0.9rem; }

.stage-num {
  font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 0.6rem;
}
.lede { font-size: 1.08rem; color: var(--ink-2); max-width: 58ch; margin-bottom: 2.2rem; }

/* ── Buttons ──────────────────────────────────────────────────────────── */
.btn {
  font: 600 1rem/1 var(--sans);
  border-radius: 999px; padding: 0.9em 1.7em;
  border: 1px solid var(--border);
  cursor: pointer; margin-top: 1.6rem;
  width: fit-content;
  transition: transform 120ms ease, opacity 120ms ease;
}
.btn.primary { background: var(--ink); color: var(--page); border-color: transparent; }
.btn.ghost { background: rgba(13, 13, 13, 0.72); color: var(--ink-2); backdrop-filter: blur(4px); }
.btn:hover:not(:disabled) { transform: translateY(-1px); }
.btn:disabled { opacity: 0.35; cursor: not-allowed; }
.btn:focus-visible { outline: 2px solid var(--felt); outline-offset: 3px; }
.hint { color: var(--muted); font-size: 0.85rem; margin: 1rem 0 0; }

/* ── Stage 1: sliders + engagement ────────────────────────────────────── */
.slider-block { margin-bottom: 2.2rem; }
.slider-block label { display: block; color: var(--ink); font-weight: 600; margin-bottom: 0.9rem; }
.slider-row { display: flex; align-items: center; gap: 1rem; }
input[type="range"] {
  flex: 1; accent-color: var(--felt); height: 28px; margin: 0;
}
input[type="range"]:focus-visible { outline: 2px solid var(--felt); outline-offset: 4px; border-radius: 4px; }
.slider-val {
  min-width: 2.4em; text-align: center; font-weight: 700; color: var(--ink);
  background: var(--surface); border: 1px solid var(--border); border-radius: 8px;
  padding: 0.25em 0.4em; font-variant-numeric: tabular-nums;
}
.slider-ends { display: flex; justify-content: space-between; color: var(--muted); font-size: 0.78rem; margin-top: 0.35rem; }

.engagement { border: 1px solid var(--hair); border-radius: 14px; padding: 1.4rem 1.4rem 0.9rem; margin: 0; }
.engagement legend { color: var(--ink); font-weight: 600; padding: 0 0.5em; }
.check-row { display: flex; gap: 0.7rem; align-items: flex-start; padding: 0.45rem 0; cursor: pointer; }
.check-row input { accent-color: var(--felt); width: 18px; height: 18px; margin-top: 3px; flex: none; }
.check-row:hover { color: var(--ink); }

/* ── Stage 2: quiz ────────────────────────────────────────────────────── */
.q-block { padding: 1.5rem 0; border-bottom: 1px solid var(--hair); }
.q-block:last-of-type { border-bottom: none; }
.q-text { color: var(--ink); font-weight: 600; margin-bottom: 0.9rem; }
.q-options { display: flex; gap: 0.6rem; flex-wrap: wrap; }
.q-opt { position: relative; }
.q-opt input { position: absolute; opacity: 0; inset: 0; cursor: pointer; }
.q-opt span {
  display: inline-block; padding: 0.55em 1.3em; border-radius: 999px;
  border: 1px solid var(--baseline); color: var(--ink-2); font-size: 0.95rem;
  transition: border-color 120ms ease, background 120ms ease;
}
.q-opt input:checked + span { background: var(--surface); border-color: var(--ink); color: var(--ink); font-weight: 600; }
.q-opt input:focus-visible + span { outline: 2px solid var(--felt); outline-offset: 2px; }
.q-opt:hover span { border-color: var(--muted); }

/* ── Stage 3: gap chart ───────────────────────────────────────────────── */
.gap-chart {
  margin: 0 0 1.6rem; padding: 1.6rem 1.5rem 1.2rem;
  background: var(--surface); border: 1px solid var(--border); border-radius: 16px;
}
.legend { display: flex; gap: 1.4rem; margin-bottom: 1.4rem; flex-wrap: wrap; }
.legend .key { display: flex; align-items: center; gap: 0.5rem; font-size: 0.82rem; color: var(--ink-2); }
.legend .swatch { width: 12px; height: 12px; border-radius: 3px; flex: none; }

.bar-row { display: grid; grid-template-columns: 168px 1fr; gap: 0.9rem; align-items: center; padding: 0.5rem 0; }
.bar-label { font-size: 0.88rem; color: var(--ink-2); text-align: right; line-height: 1.25; }
.bar-track { position: relative; height: 20px; }
.bar-track::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--baseline), var(--baseline)),
    linear-gradient(var(--hair), var(--hair)),
    linear-gradient(var(--hair), var(--hair));
  background-size: 1px 100%;
  background-position: 0 0, 50% 0, 100% 0;
  background-repeat: no-repeat;
}
.bar-val--in { padding-left: 0; padding-right: 8px; transform: translate(-100%, -50%); }
.bar-fill[data-family="measured"] ~ .bar-val--in { color: var(--page); }
.bar-fill {
  position: absolute; left: 0; top: 0; bottom: 0; width: 0;
  border-radius: 0 4px 4px 0; /* rounded data-end, square at the baseline */
  transition: width 900ms cubic-bezier(0.25, 1, 0.35, 1);
}
.bar-val {
  position: absolute; top: 50%; transform: translateY(-50%);
  font-weight: 700; font-size: 0.88rem; color: var(--ink);
  padding-left: 8px; white-space: nowrap;
  transition: left 900ms cubic-bezier(0.25, 1, 0.35, 1);
}
.axis { display: flex; justify-content: space-between; margin: 0.7rem 0 0 178px; font-size: 0.72rem; color: var(--muted); font-variant-numeric: tabular-nums; }

.verdict { font-size: 1.08rem; color: var(--ink); max-width: 58ch; border-left: 3px solid var(--measured); padding-left: 1rem; }

.fine { margin-top: 1.6rem; color: var(--muted); font-size: 0.88rem; }
.fine summary { cursor: pointer; color: var(--ink-2); }
.fine table { border-collapse: collapse; margin: 0.9rem 0; width: 100%; max-width: 460px; }
.fine th, .fine td { text-align: left; padding: 0.35rem 0.8rem 0.35rem 0; border-bottom: 1px solid var(--hair); font-weight: 400; }
.fine th { color: var(--ink-2); }
.fine td:last-child { font-variant-numeric: tabular-nums; }
.fine-note { color: var(--muted); font-size: 0.82rem; }

/* ── Stage 4: scale intro + dot field ─────────────────────────────────── */
.field-note { color: var(--ink-2); max-width: 58ch; }
.scroll-cue { font-size: 1.6rem; color: var(--muted); text-align: center; margin-top: 3rem; }
@media (prefers-reduced-motion: no-preference) {
  .scroll-cue { animation: cue 1.8s ease-in-out infinite; }
  @keyframes cue { 0%, 100% { transform: translateY(0); opacity: 0.6; } 50% { transform: translateY(8px); opacity: 1; } }
}

#dotfield { position: relative; }
.df-sticky { position: sticky; top: 0; height: 100vh; height: 100dvh; overflow: hidden; }
#df-canvas { display: block; }

.df-hud {
  position: absolute; left: 0; right: 0; bottom: 0;
  display: flex; justify-content: space-between; align-items: baseline; gap: 1rem;
  padding: 2.2rem 1.4rem 1.1rem;
  background: linear-gradient(to top, rgba(13, 13, 13, 0.92), rgba(13, 13, 13, 0));
  pointer-events: none;
}
.df-hud p { margin: 0; }
.df-num { font-size: clamp(1.3rem, 3.5vw, 1.9rem); font-weight: 750; color: var(--ink); font-variant-numeric: tabular-nums; }
.df-num.df-hi.lit { color: var(--highlight); }
.df-cap { font-size: 0.78rem; color: var(--muted); letter-spacing: 0.06em; text-transform: uppercase; }

.df-skip { position: absolute; right: 1rem; bottom: 5.4rem; margin: 0; font-size: 0.82rem; padding: 0.7em 1.2em; }

.df-rail { position: absolute; right: 8px; top: 8vh; bottom: 12vh; width: 2px; background: var(--hair); border-radius: 2px; }
.df-rail-marker { position: absolute; left: -3px; top: 0; width: 8px; height: 8px; border-radius: 50%; background: var(--ink); }
.df-rail-end { position: absolute; left: -3px; bottom: 0; width: 8px; height: 8px; border-radius: 50%; background: var(--highlight); }

#df-marks { position: absolute; inset: 0; pointer-events: none; }
.df-milestone {
  position: absolute; left: 50%; transform: translateX(-50%);
  width: min(440px, calc(100vw - 3rem));
  background: rgba(26, 26, 25, 0.93);
  border: 1px solid var(--border); border-radius: 14px;
  padding: 1.15rem 1.35rem 0.4rem;
  backdrop-filter: blur(5px);
  z-index: 3;
}
.df-kicker {
  font-size: 0.72rem; letter-spacing: 0.13em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 0.55rem;
}
.df-milestone p:not(.df-kicker) { color: var(--ink-2); font-size: 0.95rem; margin-bottom: 0.8rem; }

.df-reveal { border-color: var(--highlight); width: min(520px, calc(100vw - 3rem)); padding-bottom: 0.5rem; }
.df-reveal .df-kicker { color: var(--highlight); }
.df-reveal .df-figure { font-size: clamp(1.9rem, 5vw, 2.8rem); font-weight: 750; color: var(--ink); margin: 0.1em 0 0.35em; letter-spacing: -0.02em; }
.df-reveal .df-attr { font-size: 0.88rem; color: var(--ink-2); }
.df-reveal .df-note { font-size: 0.95rem; color: var(--ink-2); border-top: 1px solid var(--hair); padding-top: 0.9rem; }

/* ── Stage 5: tiles + epilogue ────────────────────────────────────────── */
.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 0.9rem; margin: 2.4rem 0 3.4rem; }
.tile { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 1.25rem 1.3rem; }
.tile .t-value { font-size: 2rem; font-weight: 750; color: var(--ink); letter-spacing: -0.02em; margin-bottom: 0.3rem; }
.tile .t-label { font-size: 0.92rem; color: var(--ink-2); line-height: 1.4; margin-bottom: 0.55rem; }
.tile .t-sub { font-size: 0.78rem; color: var(--muted); line-height: 1.45; margin: 0; }

.epilogue { max-width: 660px; }
.epilogue h3 { margin-top: 1rem; }
.epilogue p { max-width: 60ch; }
.chips { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 1.1rem 0 0.7rem; }
.chip {
  font-size: 0.82rem; color: var(--ink-2); border: 1px solid var(--baseline);
  border-radius: 999px; padding: 0.4em 1em; white-space: nowrap;
}

#sources ul { padding-left: 1.1rem; margin: 0.9rem 0; }
#sources li { margin-bottom: 0.5rem; }
#sources .src-date { color: var(--muted); white-space: nowrap; }

.end-actions { margin-top: 2.5rem; }
.colophon { max-width: 680px; margin: 0 auto; padding: 0 1.25rem 4rem; color: var(--muted); font-size: 0.8rem; }

/* ── Small screens ────────────────────────────────────────────────────── */
@media (max-width: 560px) {
  .bar-row { grid-template-columns: 1fr; gap: 0.3rem; }
  .bar-label { text-align: left; }
  .axis { margin-left: 0; }
  .df-skip { bottom: 6.2rem; }
}

@media (prefers-reduced-motion: reduce) {
  .bar-fill, .bar-val { transition: none; }
  .btn { transition: none; }
}

/* ── Multi-issue additions ────────────────────────────────────────────── */
:root { --highlight-dim: #7c3b52; }

[hidden] { display: none !important; }

#topnav {
  position: sticky; top: 0; z-index: 30;
  display: flex; align-items: center; gap: 1rem;
  padding: 0.85rem 1.25rem;
  background: rgba(13, 13, 13, 0.86);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--hair);
}
#topnav .wordmark {
  font-weight: 750; color: var(--ink); text-decoration: none;
  letter-spacing: -0.01em; white-space: nowrap;
}
#topnav .nav-kicker {
  flex: 1; text-align: center;
  font-size: 0.68rem; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
#topnav .nav-all {
  font-size: 0.85rem; color: var(--ink-2); text-decoration: none;
  border: 1px solid var(--baseline); border-radius: 999px; padding: 0.35em 1em;
  white-space: nowrap;
}
#topnav .nav-all:hover { border-color: var(--muted); color: var(--ink); }

.home-hero { min-height: 62vh; }
.issue-hero { min-height: 48vh; display: flex; flex-direction: column; justify-content: center; padding-top: 3rem; }
.issue-hero h1 { font-size: clamp(2.2rem, 6vw, 3.6rem); font-weight: 750; letter-spacing: -0.025em; }

.issue-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1rem; margin-top: 2rem; }
.issue-card {
  display: block; text-decoration: none;
  background: var(--surface); border: 1px solid var(--border); border-radius: 16px;
  padding: 1.35rem 1.4rem 1.1rem;
  transition: transform 130ms ease, border-color 130ms ease;
}
.issue-card:hover { transform: translateY(-2px); border-color: var(--muted); }
.issue-card:focus-visible { outline: 2px solid var(--felt); outline-offset: 3px; }
.ic-value { font-size: 1.85rem; font-weight: 750; color: var(--ink); letter-spacing: -0.02em; margin-bottom: 0.15rem; }
.ic-label { font-size: 0.78rem; color: var(--muted); line-height: 1.4; margin-bottom: 1rem; }
.ic-title { color: var(--ink); font-size: 1.12rem; margin-bottom: 0.4rem; }
.ic-blurb { font-size: 0.88rem; color: var(--ink-2); line-height: 1.5; margin-bottom: 1rem; }
.ic-meta { display: flex; justify-content: space-between; align-items: center; margin: 0; }
.ic-engine {
  font-size: 0.7rem; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--ink-2); border: 1px solid var(--baseline); border-radius: 999px; padding: 0.3em 0.85em;
}
.ic-engine[data-engine="right"] { border-color: rgba(230, 103, 103, 0.55); }
.ic-engine[data-engine="left"] { border-color: rgba(57, 135, 229, 0.6); }
.ic-engine[data-engine="both"] { border-color: rgba(144, 133, 233, 0.6); }
.ic-time { font-size: 0.75rem; color: var(--muted); }

.method-list { padding-left: 1.1rem; color: var(--ink-2); }
.method-list li { margin-bottom: 0.8rem; }
.method-list strong { color: var(--ink); }

/* Calibration */
.cal-prompt { color: var(--ink); font-weight: 600; font-size: 1.08rem; max-width: 58ch; }
.cal-input-row { display: flex; gap: 0.8rem; align-items: center; flex-wrap: wrap; margin-top: 1.2rem; }
.cal-input-row .btn { margin-top: 0; }
#cal-input {
  background: var(--surface); border: 1px solid var(--baseline); border-radius: 10px;
  color: var(--ink); font: 600 1.05rem var(--sans); padding: 0.75em 1em; width: 230px;
  font-variant-numeric: tabular-nums;
}
#cal-input:focus-visible { outline: 2px solid var(--felt); outline-offset: 2px; }
#cal-input:disabled { opacity: 0.5; }
.cal-result { margin-top: 1.8rem; border-top: 1px solid var(--hair); padding-top: 1.4rem; }
.cal-numbers { display: flex; gap: 0.9rem; align-items: baseline; flex-wrap: wrap; }
.cal-guess { color: var(--muted); font-weight: 600; }
.cal-vs { color: var(--muted); font-size: 0.8rem; }
.cal-actual { color: var(--ink); font-weight: 750; font-size: 1.15rem; max-width: 46ch; }
.cal-verdict { color: var(--ink); border-left: 3px solid var(--measured); padding-left: 1rem; max-width: 56ch; }
.cal-context { color: var(--ink-2); max-width: 58ch; }

/* Trend chart */
.trend-figure { margin: 0.5rem 0 1.2rem; background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 1.2rem 1.2rem 0.9rem; }
.trend-figure svg { display: block; width: 100%; height: auto; }
.trend-figure figcaption { margin-top: 0.6rem; }

/* Duel field labels */
.df-duel-labels {
  position: absolute; top: 0.8rem; left: 0; right: 0;
  display: flex; justify-content: space-evenly; gap: 1rem; padding: 0 1rem;
  pointer-events: none;
}
.df-duel-labels span {
  font-size: 0.78rem; letter-spacing: 0.05em; color: var(--ink-2);
  background: rgba(13, 13, 13, 0.8); border: 1px solid var(--hair);
  border-radius: 999px; padding: 0.4em 1em; backdrop-filter: blur(4px);
  max-width: 44%; text-align: center;
}

.end-actions { display: flex; gap: 0.8rem; flex-wrap: wrap; }
.src-note { color: var(--muted); font-size: 0.82rem; }