/* ================================================================
   knowledgebasedtrust.com — central stylesheet
   ================================================================ */

/* 1. FONTS — self-hosted, no CDN */
@font-face {
  font-family: "Source Serif 4";
  font-style: normal;
  font-weight: 300 900;
  font-display: swap;
  src: url("/assets/fonts/source-serif-4-var.woff2") format("woff2");
}
@font-face {
  font-family: "Source Serif 4";
  font-style: italic;
  font-weight: 300 900;
  font-display: swap;
  src: url("/assets/fonts/source-serif-4-var-italic.woff2") format("woff2");
}
@font-face {
  font-family: "Source Sans 3";
  font-style: normal;
  font-weight: 200 900;
  font-display: swap;
  src: url("/assets/fonts/source-sans-3-var.woff2") format("woff2");
}
@font-face {
  font-family: "Source Sans 3";
  font-style: italic;
  font-weight: 200 900;
  font-display: swap;
  src: url("/assets/fonts/source-sans-3-var-italic.woff2") format("woff2");
}

/* 2. DESIGN TOKENS */
:root {
  --color-paper:        #FAF8F3;
  --color-ink:          #1A1A18;
  --color-ink-2:        #4A4A46;
  --color-accent:       #2A5C99;
  --color-accent-hover: #1E4577;
  --color-rule:         #DDD9D0;
  --color-tag-bg:       #EDE9E0;
  --font-serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --font-sans:  "Source Sans 3", system-ui, -apple-system, sans-serif;
  --max-width:  720px;
  --sp-xs: 0.4rem;
  --sp-s:  0.8rem;
  --sp-m:  1.5rem;
  --sp-l:  2.5rem;
  --sp-xl: 4rem;
}

/* 3. RESET */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 18px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-serif);
  background: var(--color-paper);
  color: var(--color-ink);
  line-height: 1.72;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

/* 4. TYPOGRAPHY */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  line-height: 1.22;
  letter-spacing: -0.02em;
}
h1 {
  font-size: clamp(1.8rem, 4.5vw, 2.6rem);
  font-weight: 700;
  margin-bottom: var(--sp-m);
}
h2 {
  font-size: clamp(1.2rem, 2.5vw, 1.55rem);
  font-weight: 600;
  margin-top: var(--sp-l);
  margin-bottom: var(--sp-s);
}
h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-top: var(--sp-m);
  margin-bottom: var(--sp-xs);
}

p {
  margin-bottom: var(--sp-m);
  max-width: 65ch;
}
p:last-child { margin-bottom: 0; }

a {
  color: var(--color-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
a:hover { color: var(--color-accent-hover); }

ul, ol { padding-left: 1.5em; margin-bottom: var(--sp-m); }
li { margin-bottom: var(--sp-xs); }

strong { font-weight: 600; }
em     { font-style: italic; }

blockquote {
  border-left: 3px solid var(--color-rule);
  padding-left: var(--sp-m);
  margin: var(--sp-m) 0;
  color: var(--color-ink-2);
  font-style: italic;
}

/* 5. HEADER & NAV */
.site-header {
  border-bottom: 1px solid var(--color-rule);
  background: var(--color-paper);
  position: sticky;
  top: 0;
  z-index: 10;
}
.site-header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--sp-s) var(--sp-m);
  display: flex;
  align-items: center;
  gap: var(--sp-m);
  flex-wrap: wrap;
}
.site-logo {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-ink);
  text-decoration: none;
  letter-spacing: 0.01em;
  white-space: nowrap;
}
.site-logo:hover { color: var(--color-accent); }
.site-nav {
  display: flex;
  gap: var(--sp-m);
  flex-wrap: wrap;
  list-style: none;
  margin-left: auto;
  padding: 0;
}
.site-nav a {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: var(--color-ink-2);
  text-decoration: none;
  white-space: nowrap;
}
.site-nav a:hover { color: var(--color-accent); }

/* 6. MAIN CONTENT */
.site-main {
  flex: 1;
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
  padding: var(--sp-xl) var(--sp-m) var(--sp-l);
}

.answer {
  font-size: 1.1rem;
  line-height: 1.66;
  color: var(--color-ink);
  margin-bottom: var(--sp-l);
  padding: var(--sp-m) var(--sp-m);
  background: var(--color-tag-bg);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 4px 4px 0;
  max-width: none;
}

/* 7. RELATED PAGES */
.related-pages {
  margin-top: var(--sp-xl);
  padding-top: var(--sp-m);
  border-top: 1px solid var(--color-rule);
}
.related-pages-label {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-ink-2);
  margin-bottom: var(--sp-s);
}
.related-pages ul {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-s);
  margin-bottom: 0;
}
.related-pages a {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  display: inline-block;
  padding: 0.3em 0.9em;
  background: var(--color-tag-bg);
  border-radius: 100px;
  color: var(--color-ink-2);
  text-decoration: none;
  border: 1px solid var(--color-rule);
}
.related-pages a:hover {
  background: var(--color-rule);
  color: var(--color-ink);
}

/* 8. FAQ */
.faq-section { margin-top: var(--sp-l); }
.faq-section h2 {
  font-size: 1.3rem;
  margin-bottom: var(--sp-m);
}
.faq-item {
  margin-bottom: var(--sp-m);
  border-bottom: 1px solid var(--color-rule);
  padding-bottom: var(--sp-m);
}
.faq-item:last-child { border-bottom: none; }
.faq-item h3 { margin-top: 0; font-size: 1.05rem; color: var(--color-ink); }
.faq-item p  { margin-bottom: 0; color: var(--color-ink-2); }

/* 9. FOOTER */
.site-footer {
  border-top: 1px solid var(--color-rule);
  padding: var(--sp-l) var(--sp-m);
  font-family: var(--font-sans);
  font-size: 0.82rem;
  color: var(--color-ink-2);
}
.site-footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--sp-s);
}
.footer-legal,
.footer-spine {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25em 0.9em;
  align-items: center;
}
.footer-legal a,
.footer-spine a {
  color: var(--color-ink-2);
  text-decoration: none;
}
.footer-legal a:hover,
.footer-spine a:hover {
  color: var(--color-accent);
  text-decoration: underline;
}
.footer-sep { color: var(--color-rule); user-select: none; }
.footer-copyright {
  margin-top: var(--sp-xs);
  color: var(--color-ink-2);
}
.footer-copyright a { color: var(--color-ink-2); text-decoration: none; }
.footer-copyright a:hover { color: var(--color-accent); }

/* 10. COOKIE BANNER — hidden by default; shown only by consent.js */
#cookie-banner { display: none; }

.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: #19191A;
  color: #F0EEE9;
  z-index: 1000;
  padding: var(--sp-m);
}
.cookie-banner-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: var(--sp-m);
  flex-wrap: wrap;
}
.cookie-banner-text { flex: 1; min-width: 200px; }
.cookie-banner-text p {
  color: #F0EEE9;
  max-width: none;
  margin-bottom: var(--sp-xs);
  font-size: 0.9rem;
  font-family: var(--font-sans);
}
.cookie-banner-text p:last-child { margin-bottom: 0; }
.cookie-banner-buttons {
  display: flex;
  gap: var(--sp-s);
  flex-shrink: 0;
}
.cookie-btn {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.5em 1.3em;
  border: 2px solid transparent;
  border-radius: 4px;
  cursor: pointer;
  white-space: nowrap;
  line-height: 1.3;
}
.cookie-btn-decline {
  background: transparent;
  border-color: #F0EEE9;
  color: #F0EEE9;
}
.cookie-btn-decline:hover { background: rgba(255,255,255,0.1); }
.cookie-btn-accept {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}
.cookie-btn-accept:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
}

/* 11. DARK MODE */
@media (prefers-color-scheme: dark) {
  :root {
    --color-paper:        #19191A;
    --color-ink:          #F0EEE9;
    --color-ink-2:        #A8A59E;
    --color-accent:       #5B9BD5;
    --color-accent-hover: #7ABAEE;
    --color-rule:         #2E2E30;
    --color-tag-bg:       #222224;
  }
  .site-header { background: var(--color-paper); }
  .cookie-banner { background: #111113; }
}

/* 12. RESPONSIVE */
@media (max-width: 640px) {
  :root {
    --sp-m:  1rem;
    --sp-l:  1.8rem;
    --sp-xl: 2.5rem;
  }
  .site-header-inner { gap: var(--sp-s); }
  .site-nav { gap: var(--sp-s); }
  .cookie-banner-inner { flex-direction: column; align-items: flex-start; }
  .cookie-banner-buttons { width: 100%; }
}