/* ==========================================================================
   Theme — change colours here
   ========================================================================== */
:root {
  --bg: #ffffff;
  --surface: #f6f9fc;
  --surface-2: #eef3f8;
  --line: #e3e9f0;
  --line-strong: #cdd7e2;

  --text: #142030;
  --text-2: #4a5768;
  --text-3: #7b8796;

  --blue: #2a72c0;        /* primary: buttons, links, active states */
  --blue-strong: #1d5c9f; /* hover */
  --blue-300: #8ec0ec;
  --blue-200: #c9e1f6;
  --blue-100: #e5f1fc;
  --blue-50: #f3f9fe;

  --warn-bg: #fbefea;
  --warn-text: #a4482f;

  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 1px 2px rgba(20, 32, 48, 0.04), 0 8px 24px -12px rgba(20, 32, 48, 0.08);
  --font: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

@font-face {
  font-family: "Inter";
  src: url("../fonts/inter-var.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

/* ==========================================================================
   Base
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.55;
  font-feature-settings: "cv11", "ss01";
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
h1, h2, h3 { margin: 0; letter-spacing: -0.02em; line-height: 1.2; font-weight: 620; }
p { margin: 0; }
a { color: var(--blue); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--blue-strong); }
:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; border-radius: 6px; }
.icon { flex-shrink: 0; }

.wrap { width: 100%; max-width: 920px; margin: 0 auto; padding: 0 24px; }
.main { flex: 1; padding-top: 56px; padding-bottom: 88px; outline: none; }

/* ==========================================================================
   Header / footer
   ========================================================================== */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: saturate(1.4) blur(10px);
  -webkit-backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 600; letter-spacing: -0.01em; }
.brand:hover { color: var(--text); }
.brand-mark { width: 26px; height: 26px; }
.brand-mark rect { fill: var(--blue-100); stroke: var(--blue-200); }
.brand-mark path { fill: none; stroke: var(--blue); stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }
.nav { display: flex; gap: 4px; }
.nav a {
  color: var(--text-2); text-decoration: none; font-size: 15px; font-weight: 500;
  padding: 7px 12px; border-radius: 8px;
}
.nav a:hover { background: var(--surface); color: var(--text); }
.nav a[aria-current="page"] { color: var(--blue); background: var(--blue-50); }

.site-footer { border-top: 1px solid var(--line); background: var(--surface); }
.footer-inner { display: flex; flex-wrap: wrap; gap: 6px 24px; justify-content: space-between; padding-top: 22px; padding-bottom: 22px; font-size: 13.5px; color: var(--text-3); }

/* ==========================================================================
   Shared components
   ========================================================================== */
.eyebrow { font-size: 13px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--blue); margin-bottom: 14px; }
.lead { font-size: 18px; color: var(--text-2); max-width: 64ch; }
.lead.small { font-size: 15px; margin-top: 8px; }
.muted { color: var(--text-2); max-width: 70ch; }
.section-title { font-size: 13px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--text-3); margin: 56px 0 18px; }
.disclaimer { font-size: 13.5px; color: var(--text-3); margin-top: 40px; max-width: 70ch; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font: inherit; font-size: 15px; font-weight: 560; line-height: 1;
  padding: 13px 20px; border-radius: 10px; border: 1px solid transparent;
  cursor: pointer; text-decoration: none; white-space: nowrap;
  transition: background 0.15s, border-color 0.15s, color 0.15s, box-shadow 0.15s;
}
.btn-primary { background: var(--blue); color: #fff; box-shadow: 0 1px 2px rgba(29, 92, 159, 0.25); }
.btn-primary:hover { background: var(--blue-strong); color: #fff; }
.btn-primary:disabled { background: var(--line-strong); color: #fff; box-shadow: none; cursor: not-allowed; }
.btn-secondary { background: var(--bg); color: var(--text); border-color: var(--line-strong); }
.btn-secondary:hover { border-color: var(--blue-300); background: var(--blue-50); color: var(--text); }
.btn-ghost { background: transparent; color: var(--text-2); padding-left: 12px; padding-right: 12px; }
.btn-ghost:hover { background: var(--surface); color: var(--text); }
.btn-small { padding: 9px 14px; font-size: 14px; }

.badge {
  display: inline-flex; align-items: center; font-size: 13px; font-weight: 580;
  padding: 5px 11px; border-radius: 999px; white-space: nowrap;
}
.tone-good { background: var(--blue); color: #fff; }
.tone-mid  { background: var(--blue-100); color: var(--blue-strong); }
.tone-low  { background: var(--surface-2); color: var(--text-2); }
.tone-none { background: var(--surface-2); color: var(--text-3); box-shadow: inset 0 0 0 1px var(--line-strong); }

/* ==========================================================================
   Intro
   ========================================================================== */
.intro h1 { font-size: clamp(32px, 5vw, 46px); max-width: 18ch; margin-bottom: 20px; }
.meta { list-style: none; padding: 0; margin: 32px 0 0; display: flex; flex-wrap: wrap; gap: 10px; }
.meta li {
  font-size: 14px; color: var(--text-2);
  background: var(--surface); border: 1px solid var(--line);
  padding: 7px 13px; border-radius: 999px;
}
.meta-k { font-weight: 640; color: var(--text); margin-right: 3px; }

.start-card {
  margin-top: 36px; padding: 26px; border: 1px solid var(--line); border-radius: var(--radius);
  background: linear-gradient(180deg, var(--blue-50), var(--bg) 70%);
  box-shadow: var(--shadow);
}
.field { display: block; max-width: 520px; }
.field-label { display: block; font-size: 14px; font-weight: 580; margin-bottom: 8px; }
.optional { font-weight: 450; color: var(--text-3); margin-left: 4px; }
.field input {
  width: 100%; font: inherit; font-size: 15px; color: var(--text);
  padding: 12px 14px; border: 1px solid var(--line-strong); border-radius: 10px; background: var(--bg);
  transition: border-color 0.15s, box-shadow 0.15s;
}
.field input::placeholder { color: var(--text-3); }
.field input:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px var(--blue-100); }
.field-hint { display: block; font-size: 13px; color: var(--text-3); margin-top: 7px; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }

.areas { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.area { display: flex; gap: 18px; padding: 20px 22px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg); }
.area-num { font-size: 13px; font-weight: 640; color: var(--blue); font-variant-numeric: tabular-nums; padding-top: 3px; }
.area h3 { font-size: 17px; margin-bottom: 5px; }
.area p { font-size: 15px; color: var(--text-2); }

/* ==========================================================================
   Quiz
   ========================================================================== */
.quiz { max-width: 760px; margin: 0 auto; }
.stepper { list-style: none; padding: 0; margin: 0 0 18px; display: flex; gap: 8px; }
.step { flex: 1; display: flex; align-items: center; gap: 9px; min-width: 0; font-size: 13px; color: var(--text-3); }
.step-dot {
  width: 24px; height: 24px; flex-shrink: 0; border-radius: 50%;
  display: grid; place-items: center; font-size: 12px; font-weight: 620;
  background: var(--surface-2); color: var(--text-3);
}
.step-label { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.step.active { color: var(--text); font-weight: 560; }
.step.active .step-dot { background: var(--blue); color: #fff; }
.step.done .step-dot { background: var(--blue-100); color: var(--blue); }
.step-scope { flex: 0 0 auto; }

.progress { height: 4px; background: var(--surface-2); border-radius: 99px; overflow: hidden; margin-bottom: 28px; }
.progress span { display: block; height: 100%; background: var(--blue); border-radius: 99px; transition: width 0.35s ease; }

.qcard { border: 1px solid var(--line); border-radius: 18px; padding: 34px; background: var(--bg); box-shadow: var(--shadow); }
.qmeta { font-size: 13px; color: var(--text-3); font-weight: 520; margin-bottom: 12px; font-variant-numeric: tabular-nums; }
.qtext { font-size: clamp(21px, 3vw, 25px); font-weight: 600; line-height: 1.3; margin-bottom: 10px; }
.qhint { font-size: 14px; color: var(--text-3); margin-bottom: 24px; }

.options { border: 0; padding: 0; margin: 0; display: grid; gap: 10px; }
.option {
  position: relative; display: flex; align-items: flex-start; gap: 14px;
  padding: 15px 18px; border: 1px solid var(--line); border-radius: 12px;
  background: var(--bg); cursor: pointer; font-size: 15.5px; line-height: 1.45;
  transition: border-color 0.12s, background 0.12s, box-shadow 0.12s;
}
.option:hover { border-color: var(--blue-300); background: var(--blue-50); }
.option input { position: absolute; opacity: 0; pointer-events: none; }
.option-mark {
  flex-shrink: 0; width: 20px; height: 20px; margin-top: 1px;
  border: 1.5px solid var(--line-strong); background: var(--bg);
  border-radius: 50%; display: grid; place-items: center; transition: all 0.12s;
}
.option input[type="checkbox"] + .option-mark { border-radius: 6px; }
.option.checked { border-color: var(--blue); background: var(--blue-50); box-shadow: 0 0 0 1px var(--blue) inset; }
.option.checked .option-mark { border-color: var(--blue); background: var(--blue); }
.option.checked input[type="radio"] + .option-mark::after { content: ""; width: 8px; height: 8px; border-radius: 50%; background: #fff; }
.option.checked input[type="checkbox"] + .option-mark::after {
  content: ""; width: 10px; height: 6px; border-left: 2px solid #fff; border-bottom: 2px solid #fff;
  transform: rotate(-45deg) translate(1px, -1px);
}
.option input:focus-visible + .option-mark { box-shadow: 0 0 0 3px var(--blue-200); }
.option.is-exclusive { color: var(--text-2); }
.option-row { position: relative; }
.option-row:has(.option:not(.is-exclusive)) + .option-row:has(.is-exclusive) { margin-top: 6px; }

/* Item-level "not applicable" toggle */
.option-row.has-na .option { padding-right: 76px; }
.na-toggle {
  position: absolute; top: 50%; right: 12px; transform: translateY(-50%);
  font: inherit; font-size: 12px; font-weight: 600; letter-spacing: 0.03em;
  padding: 6px 10px; border-radius: 7px; cursor: pointer;
  border: 1px solid var(--line); background: var(--bg); color: var(--text-3);
  transition: all 0.12s;
}
.na-toggle:hover { border-color: var(--line-strong); color: var(--text-2); }
.na-toggle[aria-pressed="true"] { background: var(--text-2); border-color: var(--text-2); color: #fff; }
.option-row.is-na .option { background: var(--surface); border-style: dashed; border-color: var(--line-strong); }
.option-row.is-na .option-text { color: var(--text-3); text-decoration: line-through; text-decoration-color: var(--line-strong); }
.option-row.is-na .option-mark { opacity: 0.4; }
.qhelp { font-size: 14px; color: var(--text-2); background: var(--blue-50); border: 1px solid var(--blue-100); border-radius: 10px; padding: 10px 14px; margin: -8px 0 22px; }

.qnav { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-top: 30px; padding-top: 22px; border-top: 1px solid var(--line); }

/* ==========================================================================
   Results
   ========================================================================== */
.shared-banner, .notice {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px;
  padding: 12px 16px; margin-bottom: 28px; border-radius: 12px;
  background: var(--blue-50); border: 1px solid var(--blue-200); font-size: 14.5px; color: var(--text-2);
}
.results-head { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 24px; }
.results-head h1 { font-size: clamp(28px, 4vw, 38px); }
.results-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.toast {
  position: fixed; left: 50%; bottom: 28px; transform: translate(-50%, 16px);
  background: var(--text); color: #fff; font-size: 14px; padding: 11px 16px; border-radius: 10px;
  opacity: 0; pointer-events: none; transition: opacity 0.2s, transform 0.2s; z-index: 20; max-width: calc(100% - 32px);
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

.summary {
  display: flex; gap: 36px; align-items: center; margin-top: 36px; padding: 30px 32px;
  border: 1px solid var(--line); border-radius: 18px;
  background: linear-gradient(135deg, var(--blue-50), var(--bg) 60%); box-shadow: var(--shadow);
}
.summary-ring { position: relative; width: 148px; height: 148px; flex-shrink: 0; }
.ring { width: 100%; height: 100%; }
.ring-track { fill: none; stroke: var(--blue-100); stroke-width: 10; }
.ring-fill { fill: none; stroke: var(--blue); stroke-width: 10; stroke-linecap: round; transition: stroke-dashoffset 0.8s ease; }
.ring-label { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; }
.ring-value { font-size: 38px; font-weight: 650; letter-spacing: -0.03em; line-height: 1; font-variant-numeric: tabular-nums; }
.ring-unit { font-size: 11.5px; color: var(--text-3); margin-top: 6px; text-transform: uppercase; letter-spacing: 0.05em; font-weight: 560; }
.summary-body { flex: 1; min-width: 0; }
.summary-text { margin: 14px 0 20px; color: var(--text-2); max-width: 60ch; }
.ctx { display: flex; flex-wrap: wrap; gap: 6px 18px; margin-top: 12px; font-size: 14px; color: var(--text); }
.ctx-k { color: var(--text-3); margin-right: 4px; }

/* Composition bar: met / partial / missing / not verified / not applicable */
.comp-bar { display: flex; gap: 2px; height: 10px; border-radius: 99px; overflow: hidden; background: var(--surface-2); }
.comp-compact .comp-bar { height: 8px; }
.seg-met { background: var(--blue); }
.seg-partial { background: var(--blue-300); }
.seg-missing { background: var(--blue-100); box-shadow: inset 0 0 0 1px var(--blue-200); }
.seg-unsure { background: repeating-linear-gradient(135deg, var(--line-strong) 0 3px, var(--surface-2) 3px 6px); }
.seg-na { background: var(--surface-2); box-shadow: inset 0 0 0 1px var(--line); }
.comp-legend { list-style: none; padding: 0; margin: 12px 0 0; display: flex; flex-wrap: wrap; gap: 6px 16px; font-size: 13px; color: var(--text-2); }
.comp-legend strong { color: var(--text); font-weight: 620; margin-left: 2px; font-variant-numeric: tabular-nums; }
.sw { display: inline-block; width: 10px; height: 10px; border-radius: 3px; margin-right: 6px; vertical-align: -1px; }
.comp-compact .comp-legend { font-size: 12.5px; gap: 4px 12px; margin-top: 9px; }

.notes { display: grid; gap: 10px; margin-top: 16px; }
.note { padding: 14px 18px; border-radius: 12px; background: var(--surface); border: 1px solid var(--line); font-size: 14.5px; color: var(--text-2); }
.note-title { display: flex; gap: 10px; align-items: baseline; font-weight: 600; color: var(--text); margin-bottom: 3px; }
.stats { display: flex; flex-wrap: wrap; gap: 12px 36px; margin: 0; }
.stats dt { font-size: 13px; color: var(--text-3); margin-bottom: 2px; }
.stats dd { margin: 0; font-size: 24px; font-weight: 640; letter-spacing: -0.02em; font-variant-numeric: tabular-nums; }
.stats dd span { font-size: 16px; color: var(--text-3); font-weight: 500; }

.chapters { display: grid; gap: 16px; }
.chapter { border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 28px; background: var(--bg); }
.chapter-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 20px; }
.chapter-head h3 { font-size: 19px; }
.chapter-metrics { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.metric-top { display: flex; justify-content: space-between; font-size: 13.5px; color: var(--text-2); margin-bottom: 8px; }
.metric-top strong { color: var(--text); font-weight: 620; font-variant-numeric: tabular-nums; }
.bar { height: 8px; background: var(--surface-2); border-radius: 99px; overflow: hidden; }
.bar span { display: block; height: 100%; background: var(--blue); border-radius: 99px; }
.bar-soft span { background: var(--blue-300); }

.gaps-title { font-size: 13px; font-weight: 600; color: var(--text-3); text-transform: uppercase; letter-spacing: 0.05em; margin: 28px 0 4px; }
.gaps { list-style: none; padding: 0; margin: 0; }
.gap { padding: 16px 0; border-top: 1px solid var(--line); }
.gaps-title + .gaps .gap:first-child { border-top: 0; }
.chapter-metrics + .gaps { margin-top: 24px; }
.chapter-metrics + .no-gaps { margin-top: 22px; }
.gap-head { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 10px; margin-bottom: 8px; }
.gap-topic { font-weight: 580; font-size: 15.5px; }
.ref { font-size: 12.5px; color: var(--text-3); font-variant-numeric: tabular-nums; margin-left: auto; white-space: nowrap; }
.tag { font-size: 11.5px; font-weight: 620; letter-spacing: 0.03em; text-transform: uppercase; padding: 3px 8px; border-radius: 6px; }
.tag-missing  { background: var(--warn-bg); color: var(--warn-text); }
.tag-informal { background: var(--surface-2); color: var(--text-2); }
.tag-partial  { background: var(--blue-100); color: var(--blue-strong); }
.tag-unsure   { background: var(--bg); color: var(--text-3); box-shadow: inset 0 0 0 1px var(--line-strong); }
.tag-na       { background: var(--surface-2); color: var(--text-3); }
.tag-key      { background: var(--bg); color: var(--blue-strong); box-shadow: inset 0 0 0 1px var(--blue-200); }
.key-note { font-size: 13.5px; color: var(--blue-strong); margin-top: 8px; }
.side-list .gap-topic { font-weight: 520; color: var(--text-2); }
.chapter-na { background: var(--surface); }
.chapter-na .chapter-head { margin-bottom: 8px; }
.ans-na { color: var(--text-3); font-weight: 450; }
.gap-current, .gap-target { font-size: 14.5px; color: var(--text-2); display: flex; gap: 10px; }
.gap-target { margin-top: 5px; color: var(--text); }
.gap .k { flex-shrink: 0; width: 46px; font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; color: var(--text-3); padding-top: 2px; }
.gap-target .k { color: var(--blue); }
.missing { margin: 6px 0 0; padding-left: 18px; font-size: 14.5px; color: var(--text); }
.missing li { margin: 3px 0; }
.missing li::marker { color: var(--blue-300); }
.readiness { margin-top: 14px; padding: 12px 16px; border-radius: 10px; background: var(--surface); display: flex; justify-content: space-between; gap: 12px; font-size: 14.5px; color: var(--text-2); }
.readiness strong { color: var(--text); font-weight: 600; }
.no-gaps { margin-top: 22px; display: flex; align-items: center; gap: 8px; font-size: 15px; color: var(--blue-strong); }

.answers { margin-top: 40px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.answers summary { cursor: pointer; padding: 18px 22px; font-weight: 580; list-style: none; display: flex; justify-content: space-between; align-items: center; }
.answers summary::-webkit-details-marker { display: none; }
.answers summary::after { content: "+"; font-size: 20px; font-weight: 400; color: var(--text-3); }
.answers[open] summary::after { content: "–"; }
.answers ol { margin: 0; padding: 0 22px 18px 44px; }
.answers > ol > li { padding: 12px 0; border-top: 1px solid var(--line); font-size: 14.5px; }
.ans-q { color: var(--text-2); }
.ans-a { margin: 4px 0 0; padding-left: 18px; font-weight: 520; }

.method p { max-width: 70ch; color: var(--text-2); font-size: 15px; }
.method .disclaimer { margin-top: 16px; }

/* ==========================================================================
   About
   ========================================================================== */
.about-hero h1 { font-size: clamp(30px, 4.5vw, 42px); max-width: 22ch; margin-bottom: 22px; }
.about-hero .lead + .lead { margin-top: 14px; }
.how-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.how { padding: 22px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.how h3 { font-size: 16px; margin-bottom: 6px; }
.how p { font-size: 14.5px; color: var(--text-2); }
.how-centered .how { text-align: center; display: flex; flex-direction: column; justify-content: center; padding: 26px 28px; }
.team { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.person { padding: 24px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg); display: flex; flex-direction: column; }
.avatar {
  width: 72px; height: 72px; border-radius: 50%; object-fit: cover; object-position: center 25%; margin-bottom: 16px;
  display: grid; place-items: center; font-weight: 620; font-size: 22px;
  background: var(--blue-100); color: var(--blue); border: 1px solid var(--blue-200);
}
.person h3 { font-size: 17px; margin-bottom: 10px; }
img.avatar { display: block; background: var(--surface-2); }
.role { font-size: 14px; color: var(--blue); font-weight: 520; margin: 3px 0 12px; }
.bio { font-size: 14.5px; color: var(--text-2); flex: 1; }
.links { margin-top: 16px; display: flex; gap: 14px; font-size: 14px; font-weight: 520; }
.about-section .btn { margin-top: 22px; }

/* ==========================================================================
   AI Safety Indicator
   ========================================================================== */
.safety { margin-top: 8px; }
.si-section-title { margin-top: 64px; }
.si-notice {
  padding: 16px 18px; border-radius: 12px; font-size: 14.5px; line-height: 1.55;
  background: var(--blue-50); border: 1px solid var(--blue-200); border-left: 4px solid var(--blue);
  color: var(--text); font-weight: 500;
}
.si-summary { margin: 20px 0 6px; color: var(--text-2); max-width: 64ch; }
.si-scale { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 8px 20px; margin: 18px 0 10px; font-size: 12.5px; color: var(--text-3); }
.si-scale-ends { display: inline-flex; align-items: center; gap: 8px; }

.si-bar { display: inline-flex; gap: 3px; }
.si-bar span { width: 18px; height: 8px; border-radius: 2px; background: var(--surface-2); box-shadow: inset 0 0 0 1px var(--line); }
.si-bar span.on { box-shadow: none; }
.si-l1 span.on { background: var(--blue-200); }
.si-l2 span.on { background: var(--blue-300); }
.si-l3 span.on { background: var(--blue); }
.si-l4 span.on { background: var(--blue-strong); }
.si-scale .si-bar span.on:nth-child(1) { background: var(--blue-200); }
.si-scale .si-bar span.on:nth-child(2) { background: var(--blue-300); }
.si-scale .si-bar span.on:nth-child(3) { background: var(--blue); }
.si-scale .si-bar span.on:nth-child(4) { background: var(--blue-strong); }

.si-list { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--bg); }
.si-topic + .si-topic { border-top: 1px solid var(--line); }
.si-topic summary {
  list-style: none; cursor: pointer; display: flex; flex-wrap: wrap; align-items: center; gap: 6px 16px;
  padding: 16px 20px; transition: background 0.12s;
}
.si-topic summary::-webkit-details-marker { display: none; }
.si-topic summary:hover { background: var(--surface); }
.si-topic summary::before {
  content: ""; width: 7px; height: 7px; flex-shrink: 0; margin-right: 2px;
  border-right: 1.6px solid var(--text-3); border-bottom: 1.6px solid var(--text-3);
  transform: rotate(-45deg); transition: transform 0.15s;
}
.si-topic[open] summary::before { transform: rotate(45deg); }
.si-name { font-weight: 580; flex: 1; min-width: 180px; }
.si-right { display: inline-flex; align-items: center; gap: 12px; }
.si-level { font-size: 14px; color: var(--text); font-weight: 520; min-width: 150px; }
.si-none { color: var(--text-3); font-weight: 450; }
.si-limited { flex-basis: 100%; padding-left: 21px; font-size: 12.5px; color: var(--text-3); font-style: italic; }
.si-body { padding: 4px 20px 20px 41px; display: grid; gap: 14px; }
.si-block h4 { margin: 0 0 4px; font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-3); }
.si-block p, .si-block li { font-size: 14.5px; color: var(--text-2); }
.si-block ul { margin: 0; padding-left: 18px; }
.si-block li { margin: 3px 0; }
.si-block li::marker { color: var(--blue-300); }
.si-muted { color: var(--text-3) !important; }
.si-based { font-size: 13px; color: var(--text-3); border-top: 1px solid var(--line); padding-top: 12px; }

.si-nc { margin-top: 16px; padding: 18px 20px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--line); }
.si-nc h3 { font-size: 15px; margin-bottom: 10px; }
.si-nc ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.si-nc p { font-size: 14px; color: var(--text-2); }
.si-nc .si-nc-title { font-weight: 580; color: var(--text); }
.si-nc-ref { font-weight: 450; color: var(--text-3); font-size: 12.5px; margin-left: 4px; }

@media (max-width: 760px) {
  .si-topic summary { padding: 14px 16px; }
  .si-name { min-width: 0; flex-basis: calc(100% - 30px); }
  .si-right { padding-left: 21px; }
  .si-level { min-width: 0; }
  .si-body { padding: 4px 16px 18px 16px; }
  .si-limited { padding-left: 21px; }
}
@media print {
  .si-topic summary::before { display: none; }
  .si-list { overflow: visible; border: 0; border-radius: 0; }
  .si-topic { break-inside: auto; border: 1px solid var(--line); border-radius: 10px; margin-bottom: 8px; }
  .si-topic + .si-topic { border-top: 1px solid var(--line); }
  .si-block, .si-nc li { break-inside: avoid; }
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 760px) {
  .main { padding-top: 36px; padding-bottom: 64px; }
  .wrap { padding-left: 16px; padding-right: 16px; }
  .brand span { font-size: 15px; }
  .qcard { padding: 22px 18px; border-radius: 14px; }
  .step { flex: 0 0 auto; }
  .step.active { flex: 1; }
  .step-label { display: none; }
  .step.active .step-label { display: inline; }
  .summary { flex-direction: column; align-items: flex-start; padding: 24px 20px; gap: 20px; }
  .chapter { padding: 22px 18px; }
  .chapter-metrics { grid-template-columns: 1fr; gap: 16px; }
  .how-grid, .team { grid-template-columns: 1fr; }
  .ref { margin-left: 0; width: 100%; }
  .option-row.has-na .option { padding-right: 66px; }
  .na-toggle { right: 8px; }
  .results-actions .btn { flex: 1; }
}
@media (max-width: 420px) {
  .nav a { padding: 7px 8px; }
  .brand span { display: none; }
}

/* ==========================================================================
   Print / Save as PDF
   ========================================================================== */
@media print {
  @page { margin: 16mm; }
  body { font-size: 11pt; }
  .site-header, .site-footer, .no-print, .shared-banner, .toast { display: none !important; }
  .main { padding: 0; }
  .wrap { max-width: none; padding: 0; }
  .summary, .chapter, .answers { box-shadow: none; break-inside: avoid-page; }
  .chapter { break-inside: auto; }
  .gap { break-inside: avoid; }
  .summary { background: none; }
  .answers { background: none; }
  .answers summary::after { content: ""; }
  * { -webkit-print-color-adjust: exact; print-color-adjust: exact; }
}

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