/* Stats Assistance - Apple-native design system, matched to ReliCheck Quanta
   Tokens mirror quanta.css: blue #0A6FE8, orange #E24E2A, ink #16181D, bg #F5F6F8 */
:root {
  --paper: #F5F6F8;
  --paper-deep: #EEF0F4;
  --ink: #16181D;
  --ink-soft: #5B6270;
  --ink-faint: #8A919E;
  --rule: rgba(0, 0, 0, 0.09);
  --accent: #E24E2A;
  --accent-deep: #C13D1C;
  --quanta: #0A6FE8;
  --quanta-deep: #0857B8;
  --good: #1F9D57;
  --card: rgba(255, 255, 255, 0.72);
  --glass-border: rgba(255, 255, 255, 0.6);
  --mono: "SF Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "Helvetica Neue", Arial, sans-serif;
  --serif: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Helvetica Neue", Arial, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  background-image:
    radial-gradient(ellipse 55% 40% at 78% -5%, rgba(10, 111, 232, 0.10), transparent 70%),
    radial-gradient(ellipse 45% 35% at 8% 22%, rgba(226, 78, 42, 0.07), transparent 70%),
    radial-gradient(ellipse 60% 45% at 50% 110%, rgba(10, 111, 232, 0.06), transparent 70%);
  background-attachment: fixed;
}

.wrap { max-width: 1060px; margin: 0 auto; padding: 0 24px; }
.wrap-narrow { max-width: 820px; margin: 0 auto; padding: 0 24px; }

/* ---------- header: frosted glass nav ---------- */
header.site {
  position: sticky; top: 0; z-index: 50;
  background: rgba(245, 246, 248, 0.72);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}
header.site .bar {
  display: flex; align-items: center; gap: 24px;
  padding: 12px 0;
}
.wordmark { display: block; text-decoration: none; }
.logo-img { height: 38px; display: block; }
.byline {
  font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.14em;
  color: var(--ink-faint); white-space: nowrap;
}
nav.main { margin-left: auto; display: flex; gap: 8px; align-items: center; }
nav.main a {
  color: var(--ink-soft); text-decoration: none; font-size: 0.92rem; font-weight: 500;
  padding: 7px 14px; border-radius: 980px; white-space: nowrap;
  transition: background 0.15s ease, color 0.15s ease;
}
nav.main a:hover { color: var(--ink); background: rgba(0, 0, 0, 0.05); }
nav.main a.cta {
  color: #fff; background: var(--quanta); font-weight: 600;
  padding: 8px 18px;
}
nav.main a.cta:hover { background: var(--quanta-deep); color: #fff; }

/* ---------- typography ---------- */
h1 {
  font-family: var(--serif); font-weight: 700; letter-spacing: -0.025em;
  font-size: clamp(2.1rem, 4.6vw, 3.3rem); line-height: 1.08;
}
h2 {
  font-family: var(--serif); font-weight: 700; letter-spacing: -0.02em;
  font-size: 1.6rem; margin: 0 0 14px;
}
h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: 8px; }
p.lede { font-size: 1.18rem; color: var(--ink-soft); line-height: 1.55; font-weight: 400; }
.kicker {
  font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--quanta); font-weight: 700; margin-bottom: 14px;
}
.prose p { margin-bottom: 14px; color: var(--ink-soft); }
.prose strong { color: var(--ink); }
.prose ul, .prose ol { margin: 0 0 14px 22px; color: var(--ink-soft); }
.prose li { margin-bottom: 6px; }
a.quiet { color: var(--quanta); text-decoration: none; }
a.quiet:hover { text-decoration: underline; }

/* ---------- hero ---------- */
.hero { padding: 84px 0 60px; }
.hero .rule-top { display: none; }
.hero h1 em {
  font-style: normal;
  background: linear-gradient(92deg, var(--quanta) 30%, var(--accent) 72%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.hero p.lede { max-width: 620px; margin-top: 22px; }
.hero-actions { margin-top: 34px; display: flex; gap: 14px; flex-wrap: wrap; }

.btn {
  display: inline-block; text-decoration: none; font-weight: 600;
  padding: 13px 28px; border-radius: 980px; font-size: 1rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--quanta); color: #fff; }
.btn-primary:hover { background: var(--quanta-deep); box-shadow: 0 8px 24px rgba(10, 111, 232, 0.35); }
.btn-outline {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid rgba(0, 0, 0, 0.12);
  -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px);
}
.btn-outline:hover { background: rgba(255, 255, 255, 0.9); }
.btn-quanta { background: var(--quanta); color: #fff; }
.btn-quanta:hover { background: var(--quanta-deep); box-shadow: 0 8px 24px rgba(10, 111, 232, 0.35); }

/* ---------- calculator directory cards: glass tiles ---------- */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 18px; }
.tool-card {
  background: var(--card);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  backdrop-filter: blur(18px) saturate(160%);
  border: 1px solid var(--glass-border); border-radius: 18px;
  padding: 24px 24px 20px; text-decoration: none; color: var(--ink);
  display: flex; flex-direction: column; gap: 8px;
  box-shadow: 0 4px 20px rgba(22, 24, 29, 0.05);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}
.tool-card:hover {
  transform: translateY(-3px) scale(1.005);
  box-shadow: 0 14px 36px rgba(22, 24, 29, 0.10);
}
.tool-card .t-name { font-weight: 700; font-size: 1.12rem; letter-spacing: -0.01em; }
.tool-card .t-desc { font-size: 0.9rem; color: var(--ink-soft); line-height: 1.5; }
.tool-card .t-stat { font-family: var(--mono); font-size: 0.76rem; color: var(--quanta); margin-top: auto; padding-top: 10px; }

/* ---------- section chrome ---------- */
section.band { padding: 56px 0; }
.band-deep {
  background: rgba(255, 255, 255, 0.5);
  -webkit-backdrop-filter: blur(20px); backdrop-filter: blur(20px);
  border-top: 1px solid rgba(0, 0, 0, 0.05); border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

/* ---------- calculator page ---------- */
.calc-head { padding: 48px 0 30px; }
.breadcrumb { font-size: 0.82rem; color: var(--ink-faint); margin-bottom: 18px; }
.breadcrumb a { color: var(--ink-faint); text-decoration: none; }
.breadcrumb a:hover { color: var(--quanta); }

.calc-card {
  background: var(--card);
  -webkit-backdrop-filter: blur(20px) saturate(170%);
  backdrop-filter: blur(20px) saturate(170%);
  border: 1px solid var(--glass-border); border-radius: 20px;
  padding: 30px; box-shadow: 0 8px 32px rgba(22, 24, 29, 0.07);
}
.calc-card + .calc-card { margin-top: 22px; }

.field { margin-bottom: 18px; }
.field label {
  display: block; font-size: 0.82rem; font-weight: 600;
  color: var(--ink-soft); margin-bottom: 6px; letter-spacing: 0.01em;
}
.field .hint { font-size: 0.78rem; color: var(--ink-faint); font-weight: 400; }
.field input[type="number"], .field input[type="text"], .field select, .field textarea {
  width: 100%; padding: 11px 13px; font-size: 1rem; font-family: var(--mono);
  border: 1px solid rgba(0, 0, 0, 0.12); border-radius: 11px;
  background: rgba(255, 255, 255, 0.85); color: var(--ink);
  transition: border-color 0.12s ease, box-shadow 0.12s ease;
}
.field select { font-family: var(--sans); }
.field textarea { min-height: 110px; resize: vertical; line-height: 1.5; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--quanta); box-shadow: 0 0 0 4px rgba(10, 111, 232, 0.15);
  background: #fff;
}
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field-row-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }

.calc-run {
  background: var(--quanta); color: #fff; border: none; cursor: pointer;
  font-family: var(--sans); font-size: 1rem; font-weight: 600;
  padding: 13px 30px; border-radius: 980px;
  transition: background 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}
.calc-run:hover { background: var(--quanta-deep); transform: translateY(-1px); box-shadow: 0 8px 24px rgba(10, 111, 232, 0.35); }

/* tabs: segmented control */
.tabs {
  display: inline-flex; gap: 2px; margin-bottom: 24px;
  background: rgba(0, 0, 0, 0.055); border-radius: 11px; padding: 3px;
}
.tabs button {
  background: none; border: none; cursor: pointer; font-family: var(--sans);
  font-size: 0.9rem; font-weight: 500; color: var(--ink-soft);
  padding: 8px 16px; border-radius: 8.5px;
  transition: background 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
}
.tabs button.active {
  color: var(--ink); font-weight: 600; background: #fff;
  box-shadow: 0 1px 4px rgba(22, 24, 29, 0.12);
}
.tab-pane { display: none; }
.tab-pane.active { display: block; }

/* ---------- results ---------- */
.results { margin-top: 26px; display: none; }
.results.show { display: block; animation: rise 0.4s cubic-bezier(0.22, 1, 0.36, 1); }
@keyframes rise { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }

.result-stats {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
}
.result-stats .cell {
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(0, 0, 0, 0.06); border-radius: 14px;
  padding: 14px 16px;
}
.result-stats .cell .k { font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink-faint); font-weight: 600; }
.result-stats .cell .v { font-family: var(--mono); font-size: 1.3rem; margin-top: 4px; letter-spacing: -0.01em; }
.result-stats .cell .v.sig { color: var(--good); font-weight: 600; }

.apa-block {
  margin-top: 18px;
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: 14px; padding: 18px 20px; position: relative;
}
.apa-block .apa-label {
  font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--quanta); font-weight: 700; margin-bottom: 8px;
}
.apa-block .apa-text { font-family: var(--mono); font-size: 0.92rem; line-height: 1.7; }
.apa-block .apa-text i { font-style: italic; }
.copy-btn {
  position: absolute; top: 14px; right: 14px;
  background: rgba(0, 0, 0, 0.04);
  border: 1px solid rgba(0, 0, 0, 0.08); border-radius: 980px; cursor: pointer;
  font-size: 0.78rem; font-weight: 500; color: var(--ink-soft); padding: 5px 13px; font-family: var(--sans);
  transition: background 0.12s ease, color 0.12s ease;
}
.copy-btn:hover { background: var(--quanta); border-color: var(--quanta); color: #fff; }

/* ---------- text analyzer ---------- */
.freq-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 20px; }
.freq-panel h3 { font-size: 0.95rem; font-weight: 600; margin-bottom: 10px; }
table.freq { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
table.freq td { padding: 5px 8px 5px 0; border-bottom: 1px solid rgba(0, 0, 0, 0.05); vertical-align: middle; }
table.freq td.w { font-family: var(--mono); font-size: 0.84rem; }
table.freq td.n { text-align: right; color: var(--ink-soft); width: 3em; font-variant-numeric: tabular-nums; }
table.freq td.p { text-align: right; color: var(--ink-faint); width: 4em; font-size: 0.78rem; font-variant-numeric: tabular-nums; }
table.freq td.bar-cell { width: 34%; }
table.freq .bar { height: 8px; border-radius: 980px; background: linear-gradient(90deg, var(--quanta), rgba(10, 111, 232, 0.55)); min-width: 3px; }
.theme-note { font-size: 0.8rem; color: var(--ink-faint); margin-bottom: 10px; }
.theme-chip {
  display: inline-block; margin: 0 6px 8px 0; padding: 6px 14px;
  background: rgba(10, 111, 232, 0.08); border: 1px solid rgba(10, 111, 232, 0.2);
  border-radius: 980px; font-size: 0.85rem; font-weight: 500; color: var(--quanta-deep);
}
@media (max-width: 720px) { .freq-cols { grid-template-columns: 1fr; } }

.powered { margin-top: 14px; font-size: 0.78rem; font-weight: 400; color: var(--ink-faint); text-align: right; }
.powered a { color: var(--ink-faint); text-decoration: none; }
.powered a:hover { color: var(--quanta); }

.interp { margin-top: 16px; font-size: 0.95rem; color: var(--ink-soft); }
.interp strong { color: var(--ink); }
.calc-error { margin-top: 16px; color: var(--accent-deep); font-size: 0.92rem; display: none; }
.calc-error.show { display: block; }

/* ---------- quanta funnel ---------- */
.quanta-note {
  margin-top: 26px; padding: 22px 24px; border-radius: 18px;
  background: linear-gradient(135deg, rgba(10, 111, 232, 0.08), rgba(10, 111, 232, 0.03));
  border: 1px solid rgba(10, 111, 232, 0.18);
  -webkit-backdrop-filter: blur(16px); backdrop-filter: blur(16px);
  display: flex; align-items: center; gap: 18px; flex-wrap: wrap;
}
.quanta-note p { flex: 1; min-width: 240px; font-size: 0.93rem; color: var(--ink-soft); }
.quanta-note p strong { color: var(--quanta-deep); }

/* ---------- decision tree ---------- */
.tree-card { min-height: 300px; }
.tree-q { font-size: 1.5rem; font-weight: 700; letter-spacing: -0.02em; margin-bottom: 22px; line-height: 1.25; }
.tree-opts { display: flex; flex-direction: column; gap: 10px; }
.tree-opts button {
  text-align: left; background: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(0, 0, 0, 0.08); border-radius: 14px;
  padding: 15px 18px; font-size: 1rem; font-family: var(--sans); color: var(--ink); font-weight: 500;
  cursor: pointer; transition: border-color 0.12s ease, transform 0.12s ease, box-shadow 0.12s ease;
}
.tree-opts button:hover {
  border-color: rgba(10, 111, 232, 0.5); transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(10, 111, 232, 0.12);
}
.tree-opts button .sub { display: block; font-size: 0.82rem; color: var(--ink-faint); margin-top: 2px; font-weight: 400; }
.tree-back {
  margin-top: 20px; background: none; border: none; color: var(--ink-faint);
  cursor: pointer; font-size: 0.85rem; font-family: var(--sans); padding: 0;
}
.tree-back:hover { color: var(--quanta); }
.tree-crumbs { font-size: 0.8rem; color: var(--ink-faint); margin-bottom: 16px; min-height: 1.2em; }
.tree-answer .kicker { margin-bottom: 8px; }
.tree-answer h3 { font-size: 1.65rem; font-weight: 700; letter-spacing: -0.02em; margin-bottom: 12px; }
.tree-answer p { color: var(--ink-soft); margin-bottom: 18px; }
.tree-answer .btn + .btn { margin-left: 10px; }

/* ---------- footer ---------- */
footer.site {
  margin-top: 80px; border-top: 1px solid rgba(0, 0, 0, 0.06);
  background: rgba(255, 255, 255, 0.45);
  -webkit-backdrop-filter: blur(20px); backdrop-filter: blur(20px);
  padding: 44px 0 36px; font-size: 0.9rem; color: var(--ink-soft);
}
footer.site .cols { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 36px; }
footer.site h4 { font-size: 0.76rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--ink-faint); margin-bottom: 12px; }
footer.site a { color: var(--ink-soft); text-decoration: none; display: block; margin-bottom: 7px; }
footer.site a:hover { color: var(--quanta); }
footer.site .fine { margin-top: 32px; padding-top: 18px; border-top: 1px solid rgba(0, 0, 0, 0.06); font-size: 0.8rem; color: var(--ink-faint); }

@media (max-width: 720px) {
  header.site .bar { flex-wrap: wrap; gap: 10px 16px; }
  nav.main { margin-left: 0; width: 100%; gap: 6px; flex-wrap: wrap; }
  .byline { display: none; }
  .field-row, .field-row-3 { grid-template-columns: 1fr; }
  footer.site .cols { grid-template-columns: 1fr; }
  .hero { padding: 52px 0 42px; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}