:root {
  --bg: #f7f7f4;
  --bg-elev: #ffffff;
  --bg-sunk: #efefea;
  --ink: #15161a;
  --ink-2: #4a4c55;
  --ink-3: #7b7d86;
  --line: #e2e2dc;
  --line-strong: #cfcfc7;
  --accent: #3d4bd8;
  --accent-ink: #ffffff;
  --accent-soft: #e8eafc;
  --logo-ink: #ffffff;
  --logo-accent: #9ef0c4;
  --great: #16794a;
  --good: #2f7d8c;
  --ok: #a76b00;
  --poor: #c2540a;
  --bad: #c0292b;
  --great-soft: #e2f3ea;
  --good-soft: #e1f0f2;
  --ok-soft: #fbf0d9;
  --poor-soft: #fde8db;
  --bad-soft: #fbe3e3;
  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 1px 2px rgb(20 20 30 / 0.04), 0 8px 24px -12px rgb(20 20 30 / 0.12);
  --font: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --display: 'Bricolage Grotesque', 'Inter', system-ui, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #101114;
    --bg-elev: #17181c;
    --bg-sunk: #0b0c0e;
    --ink: #ecedf0;
    --ink-2: #b4b6bf;
    --ink-3: #868892;
    --line: #26282e;
    --line-strong: #363840;
    --accent: #8b95ff;
    --accent-ink: #0d0e1a;
    --accent-soft: #1f2340;
    --logo-ink: #101114;
    --logo-accent: #0f5c38;
    --great: #4cc38a;
    --good: #5ab8c7;
    --ok: #e0a83a;
    --poor: #f08a4b;
    --bad: #f06a6a;
    --great-soft: #12291d;
    --good-soft: #122529;
    --ok-soft: #2b2210;
    --poor-soft: #2d1a0e;
    --bad-soft: #2e1414;
    --shadow: 0 1px 2px rgb(0 0 0 / 0.3), 0 8px 24px -12px rgb(0 0 0 / 0.5);
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #101114;
  --bg-elev: #17181c;
  --bg-sunk: #0b0c0e;
  --ink: #ecedf0;
  --ink-2: #b4b6bf;
  --ink-3: #868892;
  --line: #26282e;
  --line-strong: #363840;
  --accent: #8b95ff;
  --accent-ink: #0d0e1a;
  --accent-soft: #1f2340;
  --logo-ink: #101114;
  --logo-accent: #0f5c38;
  --great: #4cc38a;
  --good: #5ab8c7;
  --ok: #e0a83a;
  --poor: #f08a4b;
  --bad: #f06a6a;
  --great-soft: #12291d;
  --good-soft: #122529;
  --ok-soft: #2b2210;
  --poor-soft: #2d1a0e;
  --bad-soft: #2e1414;
  --shadow: 0 1px 2px rgb(0 0 0 / 0.3), 0 8px 24px -12px rgb(0 0 0 / 0.5);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 16px/1.6 var(--font);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; }
h1, h2, h3 { font-family: var(--display); line-height: 1.15; letter-spacing: -0.02em; margin: 0; font-weight: 700; }
p { margin: 0; }
code { font-family: var(--mono); font-size: 0.85em; background: var(--bg-sunk); padding: 0.1em 0.35em; border-radius: 5px; }
button { font: inherit; color: inherit; }
[hidden] { display: none !important; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.wrap { width: 100%; max-width: 1160px; margin: 0 auto; padding: 0 20px; }
.muted { color: var(--ink-2); }
.small-note { font-size: 0.85rem; margin-top: 1.5rem; color: var(--ink-3); }
.sr-only { position: absolute; left: 0; top: 0; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--ink); color: var(--bg); padding: 8px 12px; border-radius: 8px; z-index: 100; }
.skip:focus { left: 8px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 40;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(1.4) blur(14px);
  -webkit-backdrop-filter: saturate(1.4) blur(14px);
  border-bottom: 1px solid var(--line);
}
.header-row { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-family: var(--display); font-weight: 700; font-size: 1.05rem; letter-spacing: -0.01em; }
.brand-wrap { display: flex; align-items: center; gap: 12px; min-width: 0; }
.load-time {
  display: inline-flex; align-items: center; gap: 6px; font-family: var(--mono); font-size: 0.72rem; color: var(--ink-3);
  padding: 3px 8px; border: 1px solid var(--line); border-radius: 7px; background: var(--bg-elev); white-space: nowrap;
}
.load-time::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--great); }
.logo-mark { width: 30px; height: 30px; color: var(--accent); }
.nav { display: flex; align-items: center; gap: 4px; }
.nav a:not(.icon-btn) { text-decoration: none; color: var(--ink-2); font-size: 0.93rem; font-weight: 500; padding: 8px 12px; border-radius: 8px; }
.nav a:not(.icon-btn):hover { color: var(--ink); background: var(--bg-sunk); }
.icon-btn { display: inline-grid; place-items: center; width: 38px; height: 38px; border-radius: 10px; border: 0; background: transparent; cursor: pointer; color: var(--ink-2); }
.icon-btn:hover { background: var(--bg-sunk); color: var(--ink); }
.icon-btn svg, .btn svg, .search svg, .feature svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.icon-btn .i-moon { display: none; }
:root[data-theme="dark"] .icon-btn .i-sun { display: none; }
:root[data-theme="dark"] .icon-btn .i-moon { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .icon-btn .i-sun { display: none; }
  :root:not([data-theme="light"]) .icon-btn .i-moon { display: block; }
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 18px; border-radius: 11px; border: 1px solid transparent;
  font-weight: 600; font-size: 0.95rem; text-decoration: none; cursor: pointer; white-space: nowrap;
  transition: background 0.15s, border-color 0.15s, transform 0.1s;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { background: color-mix(in srgb, var(--accent) 88%, var(--ink)); }
.btn-ghost { background: var(--bg-elev); border-color: var(--line-strong); color: var(--ink); }
.btn-ghost:hover { border-color: var(--ink-3); }
.btn-small { padding: 7px 12px; font-size: 0.85rem; border-radius: 9px; }
.btn-small svg { width: 15px; height: 15px; }

/* Hero */
.hero { padding: 72px 0 56px; border-bottom: 1px solid var(--line); background: radial-gradient(1200px 400px at 85% -10%, var(--accent-soft), transparent 70%); }
.hero-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 56px; align-items: center; }
.hero h1 { font-size: clamp(2.3rem, 5vw, 3.6rem); max-width: 14ch; }
.lede { font-size: 1.12rem; color: var(--ink-2); max-width: 60ch; margin-top: 18px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.kicker { display: flex; align-items: center; gap: 12px; margin-bottom: 26px; font-family: var(--mono); font-size: 0.76rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-2); }
.likert-motif { display: inline-flex; align-items: center; gap: 4px; }
.likert-motif i { width: 9px; height: 9px; border-radius: 50%; border: 1.5px solid var(--line-strong); }
.likert-motif i.on { background: var(--accent); border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.hero-stats { display: grid; grid-template-columns: repeat(3, auto); justify-content: start; gap: 0; margin: 40px 0 0; padding-top: 22px; border-top: 1px solid var(--line); }
.hero-stats div { display: flex; flex-direction: column; gap: 4px; padding-right: 28px; margin-right: 28px; border-right: 1px solid var(--line); }
.hero-stats div:last-child { border-right: 0; margin-right: 0; padding-right: 0; }
.hero-stats dd { order: -1; margin: 0; font-family: var(--display); font-size: 2rem; font-weight: 700; letter-spacing: -0.03em; line-height: 1; }
.hero-stats dt { font-size: 0.8rem; color: var(--ink-3); max-width: 15ch; line-height: 1.35; }

.hero-visual { position: relative; display: grid; gap: 14px; }
.preview-card { background: var(--bg-elev); border: 1px solid var(--line); border-radius: 18px; padding: 22px; box-shadow: var(--shadow); }
.preview-card.small { margin-left: 48px; padding: 18px 20px; }
.preview-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; font-size: 0.85rem; }
.preview-score { font-family: var(--display); font-size: 3.4rem; font-weight: 700; letter-spacing: -0.03em; line-height: 1; }
.preview-score small { font-size: 1rem; color: var(--ink-3); font-weight: 500; margin-left: 6px; }
.preview-bar { position: relative; height: 10px; background: var(--bg-sunk); border-radius: 99px; margin: 18px 0 6px; }
.preview-bar i { position: absolute; inset: 0 auto 0 0; width: var(--w); background: linear-gradient(90deg, var(--accent), var(--great)); border-radius: 99px; }
.preview-bar b { position: absolute; left: var(--x); top: -4px; bottom: -4px; width: 2px; background: var(--ink); border-radius: 2px; }
.preview-legend { display: flex; justify-content: space-between; font-size: 0.75rem; color: var(--ink-3); }
.preview-rows { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 16px; }
.preview-rows div { background: var(--bg-sunk); border-radius: 10px; padding: 10px 12px; display: grid; font-size: 0.8rem; color: var(--ink-3); }
.preview-rows strong { color: var(--ink); font-size: 0.95rem; }
.mini-row { display: grid; grid-template-columns: 110px 1fr; align-items: center; gap: 10px; font-size: 0.8rem; color: var(--ink-2); margin-top: 8px; }
.mini-bar { height: 7px; background: var(--bg-sunk); border-radius: 99px; overflow: hidden; }
.mini-bar i { display: block; height: 100%; width: var(--w); border-radius: 99px; }

/* Tags */
.abbr { display: inline-block; font-family: var(--mono); font-size: 0.78rem; font-weight: 500; letter-spacing: 0.02em; color: var(--accent); background: var(--accent-soft); padding: 3px 9px; border-radius: 7px; }
.abbr-lg { font-size: 0.95rem; padding: 5px 12px; }
.status { font-size: 0.75rem; font-weight: 600; padding: 3px 9px; border-radius: 99px; border: 1px solid; }
.status-validated { color: var(--great); border-color: color-mix(in srgb, var(--great) 35%, transparent); background: var(--great-soft); }
.status-industry { color: var(--ok); border-color: color-mix(in srgb, var(--ok) 35%, transparent); background: var(--ok-soft); }
.status-informal { color: var(--ink-3); border-color: var(--line-strong); background: var(--bg-sunk); }
.pill { white-space: nowrap; display: inline-flex; align-items: center; gap: 6px; font-size: 0.8rem; font-weight: 600; padding: 4px 11px; border-radius: 99px; }
.tone-great { color: var(--great); background: var(--great-soft); }
.tone-good { color: var(--good); background: var(--good-soft); }
.tone-ok { color: var(--ok); background: var(--ok-soft); }
.tone-poor { color: var(--poor); background: var(--poor-soft); }
.tone-bad { color: var(--bad); background: var(--bad-soft); }
.tone-neutral { color: var(--ink-2); background: var(--bg-sunk); }
.tone-bg-great { background: var(--great); }
.tone-bg-good { background: var(--good); }
.tone-bg-ok { background: var(--ok); }
.tone-bg-poor { background: var(--poor); }
.tone-bg-bad { background: var(--bad); }
.tone-bg-neutral { background: var(--accent); }

/* Library */
.library { padding: 64px 0 32px; }
.section-title { font-size: clamp(1.6rem, 3vw, 2.1rem); }
.section-title.small { font-size: 1.35rem; margin-bottom: 18px; }
.library-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 20px; flex-wrap: wrap; }
.library-head .muted { margin-top: 6px; }
.search { display: flex; align-items: center; gap: 8px; background: var(--bg-elev); border: 1px solid var(--line-strong); border-radius: 11px; padding: 0 12px; min-width: min(320px, 100%); color: var(--ink-3); }
.search:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.search input { border: 0; outline: 0; background: transparent; padding: 11px 0; font: inherit; color: var(--ink); width: 100%; }
.filter-bar {
  display: flex; gap: 2px; margin: 26px 0 8px; padding: 4px; overflow-x: auto; scrollbar-width: none;
  background: var(--bg-sunk); border: 1px solid var(--line); border-radius: 13px;
}
.filter-bar::-webkit-scrollbar { display: none; }
.filter {
  flex: 1 0 auto; display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: 0; background: transparent; border-radius: 9px; padding: 8px 14px; cursor: pointer; white-space: nowrap;
  font-size: 0.87rem; font-weight: 500; color: var(--ink-2); transition: background 0.15s, color 0.15s;
}
.filter span { font-family: var(--mono); font-size: 0.72rem; color: var(--ink-3); }
.filter:hover { color: var(--ink); }
.filter.is-active { background: var(--bg-elev); color: var(--ink); box-shadow: 0 1px 2px rgb(0 0 0 / 0.08), 0 0 0 1px var(--line); }
.filter.is-active span { color: var(--accent); }
.category { padding-top: 36px; }
.category-head { display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap; margin-bottom: 16px; }
.category-head h2 { font-size: 1.2rem; }
.category-head p { color: var(--ink-3); font-size: 0.92rem; }
.scale-list { background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.scale-row {
  display: grid; grid-template-columns: 112px minmax(0, 1fr) 200px 20px; gap: 20px; align-items: center;
  padding: 18px 22px; text-decoration: none; border-bottom: 1px solid var(--line);
  transition: background 0.15s;
}
.scale-row:last-child { border-bottom: 0; }
.scale-row:hover { background: color-mix(in srgb, var(--accent-soft) 45%, transparent); }
.scale-row > .abbr { justify-self: start; }
.scale-row h3 { font-size: 1.06rem; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.scale-row h3 .status { font-family: var(--font); letter-spacing: 0; }
.scale-row p { color: var(--ink-2); font-size: 0.92rem; margin-top: 4px; }
.scale-row-meta { display: grid; gap: 2px; font-size: 0.8rem; color: var(--ink-3); }
.scale-row-go { color: var(--ink-3); transition: transform 0.15s, color 0.15s; }
.scale-row-go svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.scale-row:hover .scale-row-go { color: var(--accent); transform: translateX(3px); }
.empty { text-align: center; padding: 48px 0; color: var(--ink-3); }

.choose { padding: 56px 0; }
.pick-list { display: grid; grid-template-columns: minmax(0, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; margin-top: 24px; }
.pick { background: var(--bg-elev); padding: 18px 22px; display: grid; grid-template-columns: minmax(0, 1.1fr) 200px minmax(0, 1.4fr); gap: 20px; align-items: center; }
.pick h3 { font-size: 1rem; font-family: var(--font); font-weight: 600; letter-spacing: 0; }
.pick p { font-size: 0.88rem; color: var(--ink-2); }
.pick-links { display: flex; gap: 6px; flex-wrap: wrap; }
.pick-links a { font-family: var(--mono); font-size: 0.78rem; text-decoration: none; color: var(--accent); background: var(--accent-soft); padding: 3px 9px; border-radius: 7px; }
.pick-links a:hover { background: var(--accent); color: var(--accent-ink); }

.about { padding: 56px 0 72px; border-top: 1px solid var(--line); }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; margin-top: 28px; }
.feature svg { width: 22px; height: 22px; color: var(--accent); margin-bottom: 14px; }
.feature h3 { font-size: 1.02rem; margin-bottom: 6px; }
.feature p { font-size: 0.92rem; color: var(--ink-2); }

/* Footer */
.site-footer { border-top: 1px solid var(--line); padding: 40px 0 28px; background: var(--bg-sunk); }
.footer-row { display: flex; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.footer-row .muted { max-width: 46ch; margin-top: 10px; font-size: 0.9rem; }
.footer-links { display: flex; gap: 20px; flex-wrap: wrap; font-size: 0.92rem; }
.footer-links a { color: var(--ink-2); text-decoration: none; }
.footer-links a:hover { color: var(--ink); }
.fine-print { font-size: 0.8rem; color: var(--ink-3); margin-top: 28px; }

/* Scale page */
.scale-hero { padding: 36px 0 0; border-bottom: 1px solid var(--line); background: linear-gradient(180deg, var(--accent-soft), transparent 220px); }
.crumbs { display: flex; gap: 8px; font-size: 0.87rem; color: var(--ink-3); margin-bottom: 22px; }
.crumbs a { color: var(--ink-2); text-decoration: none; }
.crumbs a:hover { color: var(--ink); text-decoration: underline; }
.scale-title { display: flex; gap: 10px; align-items: center; margin-bottom: 14px; }
.scale-hero h1 { font-size: clamp(1.9rem, 4vw, 2.8rem); max-width: 22ch; }
.meta-row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 18px; margin-top: 22px; font-size: 0.9rem; color: var(--ink-2); }
.meta-row > span + span::before { content: ''; display: inline-block; width: 4px; height: 4px; background: var(--ink-3); border-radius: 50%; margin: 0 14px 3px -10px; }
.meta-row .btn:first-of-type { margin-left: auto; }
.tabs { display: flex; gap: 4px; margin-top: 28px; overflow-x: auto; scrollbar-width: none; }
.tab { border: 0; background: none; padding: 12px 14px; font-weight: 600; font-size: 0.93rem; color: var(--ink-3); cursor: pointer; border-bottom: 2px solid transparent; white-space: nowrap; }
.tab:hover { color: var(--ink); }
.tab[aria-selected="true"] { color: var(--ink); border-bottom-color: var(--accent); }
.scale-body { padding-top: 32px; padding-bottom: 72px; }
.panel { max-width: 860px; }
.panel h2 { font-size: 1.25rem; margin: 28px 0 10px; }
.panel h2:first-child { margin-top: 0; }

.context-card { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; }
.context-card label { display: grid; gap: 6px; font-size: 0.82rem; font-weight: 600; color: var(--ink-2); }
input[type="text"], textarea {
  font: inherit; font-size: 0.95rem; color: var(--ink); background: var(--bg); border: 1px solid var(--line-strong);
  border-radius: 9px; padding: 9px 12px; width: 100%;
}
input[type="text"]:focus, textarea:focus { outline: 0; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
textarea { font-family: var(--mono); font-size: 0.85rem; resize: vertical; }
.notice { margin-top: 16px; padding: 12px 14px; border-radius: var(--radius-sm); background: var(--ok-soft); color: var(--ink); font-size: 0.9rem; border: 1px solid color-mix(in srgb, var(--ok) 30%, transparent); }
.instructions { color: var(--ink-2); margin: 22px 0 14px; font-size: 0.95rem; }

.items { display: grid; gap: 12px; }
.q { position: relative; margin: 0; border: 1px solid var(--line); background: var(--bg-elev); border-radius: var(--radius); padding: 18px; min-width: 0; transition: border-color 0.15s, box-shadow 0.15s; }
.q.is-answered { border-color: color-mix(in srgb, var(--accent) 35%, var(--line)); }
.q.is-missing { border-color: var(--bad); box-shadow: 0 0 0 3px var(--bad-soft); }
.q legend { display: flex; gap: 12px; align-items: flex-start; padding: 0; margin-bottom: 14px; font-weight: 500; width: 100%; float: left; }
.q legend + * { clear: both; }
.q-num { flex: none; display: inline-grid; place-items: center; min-width: 26px; height: 26px; padding: 0 6px; border-radius: 8px; background: var(--bg-sunk); color: var(--ink-2); font-family: var(--mono); font-size: 0.78rem; }
.q.is-answered .q-num { background: var(--accent); color: var(--accent-ink); }
.q-text { padding-top: 1px; }

.segments { display: grid; grid-template-columns: repeat(var(--count), 1fr); gap: 6px; }
.seg { position: relative; cursor: pointer; }
.seg input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.seg span {
  display: grid; place-items: center; align-content: center; gap: 2px; min-height: 46px; padding: 6px 4px;
  border: 1px solid var(--line-strong); border-radius: 10px; background: var(--bg); text-align: center;
  transition: background 0.12s, border-color 0.12s, color 0.12s;
}
.seg b { font-weight: 600; font-variant-numeric: tabular-nums; }
.seg small { font-size: 0.72rem; line-height: 1.2; color: var(--ink-3); }
.seg:hover span { border-color: var(--ink-3); }
.seg input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }
.seg input:checked + span { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.seg input:checked + span small { color: inherit; opacity: 0.85; }
.seg-na span { min-height: 30px; padding: 3px 12px; font-size: 0.78rem; }
.nps-det input:checked + span { background: var(--bad); border-color: var(--bad); }
.nps-pas input:checked + span { background: var(--ok); border-color: var(--ok); }
.nps-pro input:checked + span { background: var(--great); border-color: var(--great); }
.scale-ends { display: flex; justify-content: space-between; align-items: center; gap: 12px; font-size: 0.8rem; color: var(--ink-3); margin-top: 8px; }

.items-differential { gap: 0; background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.q-diff { display: grid; grid-template-columns: 34px 1fr auto 1fr; align-items: center; gap: 12px; border: 0; border-radius: 0; border-bottom: 1px solid var(--line); padding: 12px 18px; background: transparent; }
.q-diff:last-child { border-bottom: 0; }
.q-diff.is-answered { background: color-mix(in srgb, var(--accent-soft) 45%, transparent); }
.q-diff.is-missing { box-shadow: inset 3px 0 0 var(--bad); }
.diff-term { font-size: 0.93rem; }
.diff-term.left { text-align: right; }
.dots { display: flex; gap: 6px; }
.dot-opt { position: relative; cursor: pointer; }
.dot-opt input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.dot-opt span { display: block; width: 30px; height: 30px; border-radius: 50%; border: 1.5px solid var(--line-strong); background: var(--bg); transition: all 0.12s; }
.dot-opt:hover span { border-color: var(--accent); }
.dot-opt input:checked + span { background: var(--accent); border-color: var(--accent); box-shadow: inset 0 0 0 4px var(--bg-elev); }
.dot-opt input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }

.slider-wrap { display: flex; align-items: center; gap: 16px; }
.slider-wrap output { font-family: var(--mono); font-size: 0.95rem; min-width: 3ch; text-align: right; }
input[type="range"] {
  flex: 1; height: 28px; background: transparent; -webkit-appearance: none; appearance: none; cursor: pointer;
  --fill: 50%;
}
input[type="range"]::-webkit-slider-runnable-track { height: 8px; border-radius: 99px; background: linear-gradient(90deg, var(--accent) var(--fill), var(--bg-sunk) var(--fill)); background-image: linear-gradient(90deg, var(--accent) var(--fill), var(--bg-sunk) var(--fill)); }
input[type="range"]::-moz-range-track { height: 8px; border-radius: 99px; background: var(--bg-sunk); }
input[type="range"]::-moz-range-progress { height: 8px; border-radius: 99px; background: var(--accent); }
input[type="range"]::-webkit-slider-thumb { -webkit-appearance: none; width: 22px; height: 22px; margin-top: -7px; border-radius: 50%; background: var(--bg-elev); border: 2px solid var(--accent); box-shadow: var(--shadow); }
input[type="range"]::-moz-range-thumb { width: 18px; height: 18px; border-radius: 50%; background: var(--bg-elev); border: 2px solid var(--accent); }
input[type="range"].pristine::-webkit-slider-runnable-track { background: var(--bg-sunk); }
input[type="range"].pristine::-moz-range-progress { background: transparent; }
input[type="range"].pristine::-webkit-slider-thumb { border-color: var(--ink-3); }
input[type="range"].pristine::-moz-range-thumb { border-color: var(--ink-3); }

.form-bar {
  position: sticky; bottom: 12px; z-index: 20; margin-top: 20px;
  display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap;
  background: color-mix(in srgb, var(--bg-elev) 92%, transparent); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--line-strong); border-radius: 16px; padding: 12px 12px 12px 18px; box-shadow: var(--shadow);
}
.progress { display: flex; align-items: center; gap: 12px; font-size: 0.87rem; color: var(--ink-2); flex: 1; min-width: 200px; }
.progress-track { flex: 1; max-width: 220px; height: 6px; background: var(--bg-sunk); border-radius: 99px; overflow: hidden; }
.progress-track i { display: block; height: 100%; width: 0; background: var(--accent); border-radius: 99px; transition: width 0.25s; }
.form-actions { display: flex; gap: 8px; }

/* Results */
.results { display: grid; grid-template-columns: minmax(0, 1fr); gap: 18px; }
.results-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.results-head h2 { margin: 0; font-size: 1.5rem; }
.results-head p { color: var(--ink-3); font-size: 0.9rem; }
.card { background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.score-card { display: grid; grid-template-columns: auto 1fr; gap: 28px; align-items: center; }
.gauge { position: relative; width: 170px; height: 170px; }
.gauge svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.gauge circle { fill: none; stroke-width: 12; }
.gauge .track { stroke: var(--bg-sunk); }
.gauge .fill { stroke: var(--accent); stroke-linecap: round; transition: stroke-dashoffset 0.9s cubic-bezier(.2,.8,.2,1); }
.gauge-value { position: absolute; inset: 0; display: grid; place-content: center; text-align: center; }
.gauge-value strong { font-family: var(--display); font-size: 2.6rem; line-height: 1; letter-spacing: -0.03em; }
.gauge-value span { font-size: 0.8rem; color: var(--ink-3); margin-top: 4px; }
.score-detail { display: grid; gap: 12px; }
.score-detail .label { font-size: 0.85rem; color: var(--ink-3); font-weight: 500; }
.score-detail p { color: var(--ink-2); font-size: 0.95rem; }
.facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 10px; }
.fact { background: var(--bg-sunk); border-radius: 10px; padding: 10px 12px; }
.fact span { display: block; font-size: 0.75rem; color: var(--ink-3); }
.fact strong { font-size: 0.98rem; font-variant-numeric: tabular-nums; }
.card h3 { font-size: 1.05rem; margin-bottom: 14px; }
.bars { display: grid; gap: 16px; }
.bar-row { display: grid; grid-template-columns: minmax(130px, 200px) 1fr auto; gap: 14px; align-items: center; font-size: 0.92rem; }
.bar-row .val { font-family: var(--mono); font-size: 0.88rem; min-width: 5ch; text-align: right; }
.bar { position: relative; height: 10px; background: var(--bg-sunk); border-radius: 99px; }
.bar > i { position: absolute; top: 0; bottom: 0; border-radius: 99px; }
.bar .tick { position: absolute; top: -4px; bottom: -4px; width: 2px; background: var(--ink-3); border-radius: 2px; }
.bar .tick.norm { background: var(--ink); }
.bar .zero { position: absolute; top: -3px; bottom: -3px; left: 50%; width: 1px; background: var(--line-strong); }
.bar-note { grid-column: 2 / -1; font-size: 0.78rem; color: var(--ink-3); margin-top: -10px; }
.bar-label { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.bar-label .pill { font-size: 0.7rem; padding: 2px 8px; }
.legend { display: flex; flex-wrap: wrap; gap: 14px; font-size: 0.78rem; color: var(--ink-3); margin-top: 14px; }
.legend i { display: inline-block; width: 10px; height: 2px; background: var(--ink); vertical-align: middle; margin-right: 6px; }

.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius-sm); }
table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
th, td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--ink-3); font-weight: 600; background: var(--bg-sunk); position: sticky; top: 0; }
tr:last-child td { border-bottom: 0; }
td.num, th.num { text-align: right; font-family: var(--mono); font-size: 0.85rem; white-space: nowrap; }
.rev-tag { font-size: 0.7rem; color: var(--ink-3); border: 1px solid var(--line-strong); border-radius: 5px; padding: 0 5px; margin-left: 6px; white-space: nowrap; }

.export-row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.export-row .spacer { flex: 1; }

/* Dataset */
.dataset-intro { display: flex; gap: 20px; justify-content: space-between; align-items: flex-start; flex-wrap: wrap; }
.dataset-intro > div { flex: 1; min-width: 260px; }
.dataset-intro h2 { margin-top: 0; }
.dropzone {
  display: block; margin-top: 20px; text-align: center; padding: 36px 20px; cursor: pointer;
  border: 1.5px dashed var(--line-strong); border-radius: var(--radius); background: var(--bg-elev); color: var(--ink-2);
  transition: border-color 0.15s, background 0.15s;
}
.dropzone:hover, .dropzone.is-over { border-color: var(--accent); background: var(--accent-soft); }
.dropzone input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.dropzone strong { color: var(--ink); }
.paste { margin-top: 14px; }
.paste summary { cursor: pointer; color: var(--ink-2); font-size: 0.92rem; font-weight: 500; }
.paste textarea { margin: 12px 0 10px; }
.dataset-results { display: grid; grid-template-columns: minmax(0, 1fr); gap: 18px; margin-top: 28px; }
.issues { background: var(--ok-soft); border: 1px solid color-mix(in srgb, var(--ok) 30%, transparent); border-radius: var(--radius-sm); padding: 12px 16px; font-size: 0.88rem; }
.issues ul { margin: 6px 0 0; padding-left: 18px; }
.error-box { background: var(--bad-soft); color: var(--bad); border-radius: var(--radius-sm); padding: 12px 16px; margin-top: 20px; font-size: 0.92rem; }
.histogram { display: flex; align-items: flex-end; gap: 4px; height: 140px; padding-top: 10px; }
.histogram div { flex: 1; display: flex; flex-direction: column; justify-content: flex-end; align-items: center; height: 100%; gap: 4px; }
.histogram i { display: block; width: 100%; background: var(--accent); border-radius: 5px 5px 2px 2px; min-height: 2px; }
.histogram span { font-size: 0.7rem; color: var(--ink-3); font-family: var(--mono); }
.histogram em { font-style: normal; font-size: 0.72rem; color: var(--ink-2); }
.scroll-table { max-height: 420px; overflow: auto; }

/* Method */
.method-grid { display: grid; grid-template-columns: 1fr 340px; gap: 40px; max-width: 1120px; }
.panel:has(.method-grid) { max-width: none; }
.steps { padding-left: 20px; display: grid; gap: 8px; color: var(--ink-2); }
.plain { padding-left: 18px; color: var(--ink-2); display: grid; gap: 4px; }
.refs { background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; align-self: start; }
.refs h2 { margin-top: 0 !important; font-size: 1.05rem !important; }
.refs ol { padding-left: 18px; display: grid; gap: 12px; font-size: 0.86rem; color: var(--ink-2); margin: 0; }
.refs a { color: var(--accent); word-break: break-all; }

.related { margin-top: 64px; padding-top: 40px; border-top: 1px solid var(--line); }

.not-found { padding: 120px 20px; display: grid; gap: 18px; justify-items: start; }
.not-found h1 { font-size: clamp(2rem, 5vw, 3rem); }

.toast {
  position: fixed; left: 50%; bottom: 24px; transform: translate(-50%, 20px); opacity: 0; pointer-events: none;
  background: var(--ink); color: var(--bg); padding: 10px 16px; border-radius: 10px; font-size: 0.9rem; font-weight: 500;
  transition: opacity 0.2s, transform 0.2s; z-index: 60;
}
.toast.is-on { opacity: 1; transform: translate(-50%, 0); }

.print-sheet { display: none; }

@media (max-width: 980px) {
  .scale-row { grid-template-columns: 100px minmax(0, 1fr) 20px; row-gap: 8px; }
  .pick { grid-template-columns: 1fr; gap: 8px; }
  .scale-row-meta { grid-column: 2; grid-row: 2; display: flex; flex-wrap: wrap; gap: 4px 14px; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { max-width: 460px; }
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .method-grid { grid-template-columns: 1fr; }
}

@media (max-width: 680px) {
  .wrap { padding: 0 16px; }
  .nav a:not(.icon-btn) { display: none; }
  .hero { padding: 44px 0 40px; }
  .hero-stats div { padding-right: 16px; margin-right: 16px; }
  .hero-stats dd { font-size: 1.6rem; }
  .filter { flex: 0 0 auto; }
  .filter-bar { -webkit-mask-image: linear-gradient(90deg, #000 85%, transparent); mask-image: linear-gradient(90deg, #000 85%, transparent); }
  .kicker { font-size: 0.68rem; letter-spacing: 0.03em; gap: 10px; }
  .likert-motif i { width: 8px; height: 8px; }
  .preview-card.small { margin-left: 0; }
  .feature-grid { grid-template-columns: 1fr; }
  .context-card { grid-template-columns: 1fr; }
  .meta-row .btn:first-of-type { margin-left: 0; }
  .score-card { grid-template-columns: 1fr; justify-items: center; text-align: center; }
  .score-detail { justify-items: center; }
  .bar-row { grid-template-columns: 1fr auto; }
  .bar-row .bar { grid-column: 1 / -1; grid-row: 2; }
  .bar-note { grid-column: 1 / -1; margin-top: -6px; }
  .scale-row { grid-template-columns: minmax(0, 1fr); gap: 8px; padding: 16px; }
  .scale-row-meta { display: flex; flex-wrap: wrap; gap: 4px 14px; grid-column: auto; grid-row: auto; }
  .scale-row-go { display: none; }
  .q { padding: 14px; }
  .segments { gap: 4px; }
  .has-anchors .seg small { display: none; }
  .items-nps .segments { grid-template-columns: repeat(6, 1fr); }
  .q-diff { grid-template-columns: 1fr 1fr; padding: 14px; gap: 8px; }
  .q-diff .q-num { display: none; }
  .q-diff .diff-term.left { text-align: left; }
  .q-diff .diff-term.right { text-align: right; }
  .q-diff .dots { grid-column: 1 / -1; grid-row: 2; justify-content: space-between; }
  .dot-opt span { width: 34px; height: 34px; }
  .form-bar { bottom: 8px; }
  .form-actions { width: 100%; }
  .form-actions .btn { flex: 1; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}

@media print {
  body > *:not(.print-sheet) { display: none !important; }
  body { background: #fff; color: #000; }
  .print-sheet { display: block; font: 11pt/1.45 var(--font); color: #000; }
  .print-sheet h1 { font-size: 18pt; margin-bottom: 4pt; }
  .print-sheet .cite { font-size: 8.5pt; color: #444; margin-bottom: 14pt; }
  .print-sheet .fields { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14pt; margin-bottom: 16pt; }
  .print-sheet .fields div { border-bottom: 1px solid #000; padding-top: 14pt; font-size: 8.5pt; }
  .print-sheet .pq { break-inside: avoid; padding: 8pt 0; border-bottom: 1px solid #ddd; }
  .print-sheet .pq p { margin-bottom: 6pt; }
  .print-sheet .boxes { display: flex; align-items: center; gap: 6pt; font-size: 8.5pt; }
  .print-sheet .boxes b { display: inline-grid; place-items: center; width: 20pt; height: 20pt; border: 1px solid #000; border-radius: 3pt; font-weight: 400; }
  .print-sheet .boxes .end { flex: 1; color: #333; }
  .print-sheet .boxes .end:last-child { text-align: right; }
  .print-sheet .foot { margin-top: 18pt; font-size: 8pt; color: #666; }
}

@media print {
  .print-sheet .boxes b.tiny { width: 11pt; height: 11pt; border-radius: 2pt; }
  .print-sheet .boxes:has(.tiny) { gap: 2pt; }
}