/* ===========================================================
   Knowledge, Only. — design tokens
   =========================================================== */
:root{
  --bg:      #F6F5F1;  /* off-white page */
  --surface: #FFFFFF;  /* card surface */
  --ink:     #1F2024;  /* charcoal text */
  --ink-soft:#5B5D63;  /* secondary text */
  --navy:    #1E3A5F;  /* deep blue — links, primary actions */
  --navy-deep:#16293F;
  --accent:  #C98A3B;  /* the one accent — citations, active states */
  --accent-soft: #F1E3CB;
  --line:    #E4E2DC;  /* hairline borders */

  --dot-green: #6B8F71;
  --dot-amber: #C97A4A;
  --dot-slate: #3D5A73;

  --font-display: "Newsreader", Georgia, serif;
  --font-body:    "IBM Plex Sans", Arial, sans-serif;
  --font-mono:    "IBM Plex Mono", "Courier New", monospace;

  --wrap: 1080px;
  --radius: 16px;
}

/* ===========================================================
   Reset & base
   =========================================================== */
*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; overflow-x: hidden; }
body{
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
h1, h2, h3, h4{
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.2;
  margin: 0;
}
p{ margin: 0; }
a{ color: inherit; text-decoration: none; }
ul{ margin: 0; padding: 0; list-style: none; }
button{ font-family: inherit; background: none; border: none; cursor: pointer; color: inherit; }
input, select{ font-family: inherit; }

:focus-visible{
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.wrap{
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 28px;
}

.disabled{ opacity: 0.45; cursor: default; pointer-events: none; }

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

/* ===========================================================
   Header
   =========================================================== */
.site-header{
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(246, 245, 241, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-row{
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo-group{ display: flex; align-items: baseline; gap: 12px; }
.logo{
  font-family: "Inter", Arial, sans-serif;
  font-size: 19px;
  font-style: normal;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.tagline{
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.02em;
  color: var(--ink-soft);
  padding-left: 12px;
  border-left: 1px solid var(--line);
}
.heading-inter{
  font-family: "Inter", Arial, sans-serif;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.primary-nav{ display: flex; gap: 30px; }
.primary-nav a{
  font-size: 14.5px;
  font-weight: 500;
  color: var(--ink-soft);
  transition: color 0.15s ease;
}
.primary-nav a:not(.disabled):hover{ color: var(--navy); }
.primary-nav a[aria-current="page"]{ color: var(--navy); font-weight: 600; }

.icon-btn{
  width: 38px; height: 38px;
  display: grid; place-items: center;
  color: var(--ink-soft);
  border-radius: 8px;
  transition: background 0.15s ease, color 0.15s ease;
}
.icon-btn:hover{ background: var(--line); color: var(--ink); }
.nav-toggle{ display: none; }

/* ===========================================================
   Hero (homepage)
   =========================================================== */
.hero{ padding: 88px 0 72px; text-align: center; }
.hero-inner{ max-width: 700px; margin: 0 auto; }
.hero h1{
  font-size: clamp(36px, 5vw, 54px);
  margin-bottom: 20px;
}
.hero-sub{
  font-size: 18px;
  color: var(--ink-soft);
  max-width: 560px;
  margin: 0 auto 40px;
}

.ask-box{
  display: flex;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 6px 6px 24px;
  box-shadow: 0 8px 24px rgba(31,32,36,0.06);
  margin-bottom: 22px;
}
.ask-box input{
  flex: 1;
  border: none;
  background: none;
  font-size: 16px;
  padding: 14px 8px;
  color: var(--ink);
}
.ask-box input::placeholder{ color: #9A988F; }
.ask-box button{
  width: 42px; height: 42px;
  border-radius: 50%;
  background: var(--navy);
  color: #fff;
  display: grid; place-items: center;
  flex-shrink: 0;
  transition: background 0.15s ease;
}
.ask-box button:hover{ background: var(--navy-deep); }
.ask-box-lg{ padding: 8px 8px 8px 28px; }
.ask-box-lg input{ font-size: 17px; padding: 16px 8px; }

.chip-row{
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-bottom: 36px;
}
.chip{
  font-size: 13.5px;
  color: var(--navy);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 9px 16px;
  transition: border-color 0.15s ease, background 0.15s ease;
}
.chip:hover{ border-color: var(--navy); background: #FBFAF7; }

.hero-actions{ display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.btn{
  display: inline-flex;
  align-items: center;
  padding: 13px 26px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  transition: transform 0.15s ease, opacity 0.15s ease, border-color 0.15s ease;
}
.btn-primary{ background: var(--navy); color: #fff; }
.btn-primary:hover{ transform: translateY(-1px); opacity: 0.92; }
.btn-ghost{ border: 1px solid var(--line); color: var(--ink); }
.btn-ghost:hover{ border-color: var(--navy); color: var(--navy); }

/* ===========================================================
   Themes section (homepage)
   =========================================================== */
.themes{ padding: 24px 0 100px; }
.theme-grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
.theme-stack{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.theme-card{
  position: relative;
  display: block;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 36px;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}
.theme-card:hover{
  transform: translateY(-3px);
  box-shadow: 0 16px 32px rgba(31,32,36,0.08);
}
.theme-featured{ padding: 56px; }
.theme-featured h2{ font-size: 32px; margin-bottom: 10px; }
.theme-featured p{ font-size: 16.5px; color: var(--ink-soft); max-width: 420px; }
.theme-stack h2{ font-size: 21px; margin-bottom: 8px; }
.theme-stack p{ font-size: 14.5px; color: var(--ink-soft); }

.dot{ display: inline-block; width: 10px; height: 10px; border-radius: 50%; margin-bottom: 18px; }
.dot-green{ background: var(--dot-green); }
.dot-amber{ background: var(--dot-amber); }
.dot-slate{ background: var(--dot-slate); }

/* ===========================================================
   Footer
   =========================================================== */
.site-footer{ border-top: 1px solid var(--line); padding: 36px 0 44px; }
.footer-row{ display: flex; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.footer-statement{ font-size: 13px; color: var(--ink-soft); max-width: 560px; }
.footer-credit{ font-size: 13px; color: var(--ink-soft); align-self: flex-start; flex-shrink: 0; }
.footer-credit a{ color: var(--navy); text-decoration: underline; text-decoration-color: var(--line); }
.footer-credit a:hover{ text-decoration-color: var(--navy); }
.footer-links{ display: flex; gap: 22px; align-self: flex-start; }
.footer-links a{ font-size: 13.5px; color: var(--ink-soft); transition: color 0.15s ease; }
.footer-links a:not(.disabled):hover{ color: var(--ink); }

/* ===========================================================
   Theme page hero
   =========================================================== */
.theme-hero{ padding: 48px 0 40px; border-bottom: 1px solid var(--line); }
.breadcrumb{
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  margin-bottom: 18px;
}
.breadcrumb a:hover{ color: var(--navy); }
.theme-hero h1{ font-size: clamp(28px, 3.6vw, 38px); margin-bottom: 26px; }

.filter-row{
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin: 22px 0 24px;
}
.filter-pill{
  font-family: var(--font-mono);
  font-size: 12.5px;
  border-radius: 999px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  color: var(--ink-soft);
}
.filter-pill-active{ background: var(--accent-soft); border-color: var(--accent); color: #6B4A1C; }
.filter-select{
  font-size: 13.5px;
  color: var(--ink-soft);
  display: flex;
  align-items: center;
  gap: 6px;
}
.filter-select select{
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 6px 10px;
  background: var(--surface);
  color: var(--ink);
  font-size: 13.5px;
}
.filter-toggles{ display: flex; gap: 8px; flex-wrap: wrap; }
.toggle-pill{
  font-size: 13px;
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--ink-soft);
  transition: all 0.15s ease;
}
.toggle-pill.is-on{ background: var(--navy); color: #fff; border-color: var(--navy); }

.country-strip{ display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-top: 28px; }
.country-strip-label{ font-size: 13px; color: var(--ink-soft); margin-right: 4px; }
.country-pill{
  font-size: 13.5px;
  padding: 7px 15px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--ink-soft);
  transition: all 0.15s ease;
}
.country-pill:hover{ border-color: var(--navy); color: var(--navy); }
.country-pill.is-active{ background: var(--navy); color: #fff; border-color: var(--navy); }

/* ===========================================================
   Answer section
   =========================================================== */
.answer-section{ padding: 44px 0 100px; max-width: 760px; margin: 0 auto; }
.example-badge{
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: #6B4A1C;
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 5px 12px;
  margin-bottom: 16px;
}
.question-line{
  font-family: var(--font-display);
  font-style: italic;
  font-size: 21px;
  color: var(--navy);
  margin-bottom: 28px;
}

.media-row{ margin-bottom: 32px; }
.media-label{
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  margin-bottom: 14px;
}
.media-grid{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.media-card{
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.media-card video{
  width: 100%;
  border-radius: 8px;
  display: block;
  background: #0d1f14;
}
.media-card-audio{ justify-content: space-between; }
.media-audio-head{
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  line-height: 1.4;
}
.media-audio-icon{
  width: 30px; height: 30px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  display: grid;
  place-items: center;
  flex-shrink: 0;
}
.media-card audio{ width: 100%; }
.media-caption{
  font-size: 12px;
  color: var(--ink-soft);
}
.media-card-pending{
  border-style: dashed;
  align-items: center;
}
.media-pending-visual{
  width: 100%;
  height: 140px;
  border-radius: 8px;
  border: 1px dashed var(--line);
  background: var(--bg);
  color: var(--ink-soft);
  display: grid;
  place-items: center;
}
.media-pending-visual-audio{ height: 64px; }

.tabs{ display: flex; gap: 28px; border-bottom: 1px solid var(--line); margin-bottom: 28px; }
.tab{
  font-size: 14.5px;
  font-weight: 500;
  color: var(--ink-soft);
  padding: 0 0 14px;
  border-bottom: 2px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}
.tab.is-active{ color: var(--navy); border-color: var(--navy); }

.answer-text{ font-size: 17px; line-height: 1.75; margin-bottom: 36px; }
.block-title{ font-size: 18px; margin-bottom: 16px; }

.cite{
  position: relative;
  display: inline-flex;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
  font-weight: 600;
  cursor: pointer;
  padding: 0 1px;
}
.cite:hover, .cite:focus, .cite.is-open{ text-decoration: underline; }
.cite::after{
  content: attr(data-pub) " — " attr(data-page) "\A" attr(data-quote);
  white-space: pre-line;
  position: absolute;
  bottom: 130%;
  left: 50%;
  transform: translateX(-50%);
  width: 260px;
  background: var(--ink);
  color: #F6F5F1;
  font-family: var(--font-body);
  font-size: 12.5px;
  line-height: 1.5;
  padding: 12px 14px;
  border-radius: 10px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s ease;
  z-index: 30;
}
.cite:hover::after, .cite:focus::after, .cite.is-open::after{ opacity: 1; }

.evidence-grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 36px;
}
.evidence-card{
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 20px;
}
.evidence-type{
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  display: block;
  margin-bottom: 10px;
}
.evidence-card h4{ font-size: 15.5px; margin-bottom: 8px; line-height: 1.35; }
.evidence-card p{ font-size: 13.5px; color: var(--ink-soft); margin-bottom: 14px; }
.evidence-link{ font-size: 13px; color: var(--navy); font-weight: 500; }
.evidence-link:hover{ text-decoration: underline; }

.consideration-list{ margin-bottom: 36px; }
.consideration-list li{
  font-size: 15px;
  color: var(--ink-soft);
  padding-left: 22px;
  position: relative;
  margin-bottom: 14px;
  line-height: 1.6;
}
.consideration-list li::before{
  content: "";
  position: absolute;
  left: 0; top: 9px;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.related-grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-bottom: 40px;
}
.related-card{
  background: var(--accent-soft);
  border-radius: 14px;
  padding: 18px;
}
.related-card h4{ font-size: 15px; color: #6B4A1C; margin-bottom: 6px; }
.related-card p{ font-size: 13px; color: #6B4A1C; opacity: 0.85; }

.followup-box{
  display: flex;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 4px 4px 20px;
}
.followup-box input{
  flex: 1;
  border: none;
  background: none;
  font-size: 15px;
  padding: 13px 8px;
  color: var(--ink);
}
.followup-box input::placeholder{ color: #9A988F; }
.followup-box button{
  width: 38px; height: 38px;
  border-radius: 50%;
  background: var(--navy);
  color: #fff;
  display: grid; place-items: center;
  flex-shrink: 0;
}

.source-list li{
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}
.source-list h4{ font-size: 15.5px; margin-bottom: 6px; }
.source-meta{ font-size: 12.5px; color: var(--ink-soft); }
.source-list a{ font-size: 13.5px; color: var(--navy); font-weight: 500; flex-shrink: 0; }
.source-list a:hover{ text-decoration: underline; }

/* ===========================================================
   Responsive
   =========================================================== */
/* ===========================================================
   About page
   =========================================================== */
.about-page{ padding: 52px 0 100px; }
.about-wrap{ max-width: 660px; }
.about-block{ padding: 36px 0; border-top: 1px solid var(--line); }
.about-block:first-of-type{ border-top: none; padding-top: 0; }
.about-block h2{ font-size: 27px; margin-bottom: 18px; }
.about-block p{ font-size: 16.5px; color: var(--ink-soft); line-height: 1.75; margin-bottom: 18px; }
.about-block p:last-child{ margin-bottom: 0; }
.about-block p a{ color: var(--navy); text-decoration: underline; text-decoration-color: var(--line); }
.about-block p a:hover{ text-decoration-color: var(--navy); }
.about-block .question-line{ font-size: 19px; margin-bottom: 18px; }
.about-list{ margin-bottom: 18px; }
.about-signature{ margin-top: 4px; color: var(--ink-soft); }
.about-signature a{ color: var(--navy); font-weight: 500; }
.about-signature a:hover{ text-decoration: underline; }

@media (max-width: 880px){
  .tagline{ display: none; }
  .theme-stack{ grid-template-columns: 1fr; }
  .evidence-grid, .related-grid{ grid-template-columns: 1fr; }
  .theme-featured{ padding: 40px; }
  .media-grid{ grid-template-columns: 1fr; }
}

@media (max-width: 720px){
  .primary-nav{
    position: absolute;
    top: 72px; left: 0; right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    gap: 0;
    padding: 8px 28px 16px;
    display: none;
  }
  .primary-nav.open{ display: flex; }
  .primary-nav a{ padding: 12px 0; border-bottom: 1px solid var(--line); }
  .primary-nav a:last-child{ border-bottom: none; }
  .nav-toggle{ display: grid; }
  .hero{ padding: 56px 0 48px; }
  .filter-row{ gap: 10px; }
  .tabs{ gap: 20px; }
  .cite::after{
    position: fixed;
    top: 50%;
    left: 50%;
    bottom: auto;
    transform: translate(-50%, -50%);
    width: calc(100vw - 56px);
    max-width: 300px;
    box-shadow: 0 12px 32px rgba(0,0,0,0.35);
    z-index: 60;
  }
}