/* =========================================================================
   SAS KNOWLEDGE BASE - stylesheet
   Uses the same palette as style.css:
     #1D3C2A  deep green (primary)
     #D7BF8F  tan (secondary / hero bg)
     #BB8C3C  gold (accent / hover)
     #848484  body text gray
     #F9F9F9  light section bg
   ========================================================================= */

:root {
  --kb-green: #1D3C2A;
  --kb-green-soft: #3d4f42;
  --kb-tan: #D7BF8F;
  --kb-tan-border: #BFA876;
  --kb-gold: #BB8C3C;
  --kb-gray: #848484;
  --kb-bg: #F9F9F9;
  --kb-white: #fff;
}

/* ---------- Hero ---------- */
.kb-hero {
  background-color: var(--kb-tan);
  padding: 150px 0 60px;
  text-align: center;
}
.kb-hero h1 {
  color: var(--kb-green);
  font-size: 38px;
  margin: 10px 0 6px;
}
.kb-hero .kb-discipline {
  color: var(--kb-green-soft);
  font-size: 14px;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin: 0;
}
.kb-hero-meta {
  display: flex;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}

/* ---------- Pills / badges ---------- */
.kb-pill {
  display: inline-block;
  padding: 5px 14px;
  border-radius: 30px;
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
  font-weight: 600;
  background: var(--kb-white);
  color: var(--kb-green);
  border: 1px solid var(--kb-green);
}
.kb-pill-category { background: var(--kb-green); color: #fff; border-color: var(--kb-green); }
.kb-pill-time { background: transparent; color: var(--kb-green-soft); border-color: var(--kb-tan-border); }
.kb-badge-beginner { background: #eaf4ea; color: #2c6b2f; border-color: #2c6b2f; }
.kb-badge-intermediate { background: #fbf1de; color: var(--kb-gold); border-color: var(--kb-gold); }
.kb-badge-advanced { background: #f7e8e6; color: #a4402f; border-color: #a4402f; }
.kb-badge-default { background: var(--kb-bg); color: var(--kb-gray); border-color: #ddd; }
.kb-pill-new { background: var(--kb-gold); color: #fff; border-color: var(--kb-gold); }

/* ---------- Layout: rail + main ---------- */
.kb-layout {
  display: flex;
  gap: 50px;
  align-items: flex-start;
  padding: 60px 0 40px;
}
.kb-main { flex: 1; min-width: 0; }

.kb-rail {
  position: sticky;
  top: 110px;
  width: 200px;
  flex-shrink: 0;
}
.kb-rail ol { list-style: none; margin: 0; padding: 0; position: relative; }
.kb-rail ol:before {
  content: "";
  position: absolute;
  left: 11px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: #e5e5e5;
}
.kb-rail li { margin-bottom: 4px; position: relative; }
.kb-rail a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 7px 4px;
  color: var(--kb-gray);
  font-size: 13px;
  font-family: "Catamaran", sans-serif;
  font-weight: 600;
}
.kb-rail-num {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--kb-white);
  border: 1px solid #ddd;
  color: var(--kb-gray);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  flex-shrink: 0;
  position: relative;
  z-index: 1;
  transition: all 0.2s ease;
}
.kb-rail a:hover .kb-rail-num,
.kb-rail a.kb-active .kb-rail-num {
  background: var(--kb-green);
  border-color: var(--kb-green);
  color: #fff;
}
.kb-rail a.kb-active { color: var(--kb-green); }

@media (max-width: 991px) {
  .kb-layout { flex-direction: column; }
  .kb-rail {
    position: static;
    width: 100%;
    overflow-x: auto;
    padding-bottom: 6px;
  }
  .kb-rail ol { display: flex; gap: 18px; }
  .kb-rail ol:before { display: none; }
  .kb-rail li { margin: 0; white-space: nowrap; }
}

/* ---------- Section blocks ---------- */
.kb-section {
  margin-bottom: 55px;
  scroll-margin-top: 110px;
}
.kb-section h2 {
  font-size: 24px;
  color: #232323;
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--kb-tan);
  display: inline-block;
}
.kb-section p { text-align: left; }
.kb-hint { color: var(--kb-gray); font-size: 13px; margin-top: -8px; margin-bottom: 20px; }

.kb-takeaways {
  background: var(--kb-bg);
  border-left: 3px solid var(--kb-green);
  padding: 18px 22px;
  margin-top: 20px;
}
.kb-takeaways h3 { font-size: 15px; text-transform: uppercase; letter-spacing: 1px; margin-bottom: 10px; color: var(--kb-green); }
.kb-takeaways ul { margin: 0; padding-left: 20px; }
.kb-takeaways li { color: #555; margin-bottom: 6px; font-size: 15px; }

.kb-objectives { padding-left: 0; list-style: none; }
.kb-objectives li {
  padding: 10px 0 10px 30px;
  position: relative;
  color: #555;
  border-bottom: 1px solid #eee;
}
.kb-objectives li:before {
  content: "\2713";
  position: absolute;
  left: 0;
  color: var(--kb-green);
  font-weight: 700;
}

/* ---------- Video ---------- */
.kb-video-wrap { position: relative; padding-bottom: 56.25%; height: 0; background: #000; }
.kb-video-wrap iframe { position: absolute; top: 0; left: 0; width: 100%; height: 100%; border: 0; }

/* ---------- Glossary ---------- */
.kb-glossary { margin: 0; }
.kb-glossary dt {
  font-family: "Catamaran", sans-serif;
  font-weight: 700;
  color: var(--kb-green);
  margin-top: 16px;
  font-size: 16px;
}
.kb-glossary dd { margin: 4px 0 0; color: #666; }

/* ---------- Timeline ---------- */
.kb-timeline {
  list-style: none;
  padding: 0;
  margin: 0;
  position: relative;
  padding-left: 26px;
  border-left: 2px solid var(--kb-tan);
}
.kb-timeline li { position: relative; padding-bottom: 24px; }
.kb-timeline li:last-child { padding-bottom: 0; }
.kb-timeline li:before {
  content: "";
  position: absolute;
  left: -32px;
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--kb-green);
  border: 2px solid #fff;
  box-shadow: 0 0 0 2px var(--kb-tan);
}
.kb-timeline-year {
  display: block;
  font-weight: 700;
  color: var(--kb-green);
  font-family: "Catamaran", sans-serif;
}
.kb-timeline-event { color: #666; }

/* ---------- Mind map ---------- */
.kb-mm-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
}
.kb-mm-toolbar .kb-hint { margin: 0; max-width: 480px; }
.kb-mm-controls { display: flex; gap: 8px; flex-shrink: 0; }
.kb-mm-controls button {
  background: var(--kb-white);
  border: 1px solid var(--kb-green);
  color: var(--kb-green);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  padding: 7px 14px;
  border-radius: 30px;
  cursor: pointer;
  transition: 0.2s ease;
}
.kb-mm-controls button:hover { background: var(--kb-green); color: #fff; }

.kb-mindmap-tree, .kb-mindmap-tree ul.kb-mm-children {
  list-style: none;
  margin: 0;
  padding: 0;
}
.kb-mindmap-tree { padding-left: 0; }
.kb-mm-node { position: relative; margin: 10px 0; }
.kb-mm-children {
  margin-left: 14px;
  padding-left: 24px !important;
  border-left: 2px solid var(--kb-tan-border);
}
.kb-mm-children > .kb-mm-node { margin: 12px 0; }
.kb-mm-children > .kb-mm-node:before {
  content: "";
  position: absolute;
  left: -24px;
  top: 16px;
  width: 20px;
  height: 2px;
  background: var(--kb-tan-border);
}
.kb-mm-row { display: inline-flex; align-items: center; gap: 8px; }
.kb-mm-toggle {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  border-radius: 50%;
  border: 1px solid var(--kb-green);
  background: #fff;
  color: var(--kb-green);
  font-size: 14px;
  line-height: 1;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: 0.2s ease;
}
.kb-mm-toggle:hover { background: var(--kb-green); color: #fff; }
.kb-mm-node.kb-mm-collapsed > .kb-mm-children { display: none; }
.kb-mm-node.kb-mm-collapsed > .kb-mm-row .kb-mm-toggle:before { content: ""; }

.kb-mm-text {
  display: inline-block;
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
  border: 1px solid #e2e2e2;
  background: var(--kb-bg);
  color: #333;
}
.kb-mm-node[data-level="0"] > .kb-mm-row .kb-mm-text {
  background: var(--kb-green);
  color: #fff;
  border-color: var(--kb-green);
  font-size: 16px;
  padding: 10px 20px;
}
.kb-mm-node[data-level="1"] > .kb-mm-row .kb-mm-text {
  background: #fbf1de;
  border-color: var(--kb-gold);
  color: #6b4f1f;
}
.kb-mm-node[data-level="2"] > .kb-mm-row .kb-mm-text {
  background: #fff;
  border-color: #ddd;
  color: #555;
  font-weight: 500;
}

@media (max-width: 600px) {
  .kb-mm-children { margin-left: 8px; padding-left: 16px !important; }
  .kb-mm-text { font-size: 13px; padding: 7px 12px; }
}

/* ---------- Figures ---------- */
.kb-figures { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; }
.kb-figure-card { background: var(--kb-bg); padding: 18px; border-radius: 6px; }
.kb-figure-card img { width: 100%; height: auto; border-radius: 4px; margin-bottom: 10px; }
.kb-figure-card h4 { font-size: 15px; color: var(--kb-green); margin-bottom: 6px; }
.kb-figure-card p { font-size: 13px; color: var(--kb-gray); margin: 0; }

/* ---------- Flashcards ---------- */
.kb-flashcard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
}
.kb-flashcard {
  background: none;
  border: 0;
  padding: 0;
  height: 160px;
  perspective: 1200px;
  cursor: pointer;
  text-align: left;
  font: inherit;
}
.kb-flashcard-inner {
  position: relative;
  width: 100%;
  height: 100%;
  display: block;
  transition: transform 0.55s cubic-bezier(0.4, 0.2, 0.2, 1);
  transform-style: preserve-3d;
}
.kb-flashcard.kb-flipped .kb-flashcard-inner { transform: rotateY(180deg); }
.kb-flashcard-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  border-radius: 8px;
  padding: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: 14px;
  line-height: 1.4;
  box-shadow: 0 2px 10px rgba(0,0,0,0.06);
}
.kb-flashcard-front { background: var(--kb-white); border: 1px solid #e5e5e5; color: #232323; font-weight: 600; }
.kb-flashcard-back { background: var(--kb-green); color: #fff; transform: rotateY(180deg); }

/* ---------- Quiz ---------- */
.kb-quiz-question {
  border: 0;
  border-bottom: 1px solid #eee;
  padding: 0 0 22px;
  margin: 0 0 22px;
}
.kb-quiz-question legend {
  font-family: "Catamaran", sans-serif;
  font-weight: 700;
  color: #232323;
  padding: 0;
  margin-bottom: 12px;
  font-size: 16px;
}
.kb-quiz-option {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border: 1px solid #e5e5e5;
  border-radius: 6px;
  margin-bottom: 8px;
  cursor: pointer;
  transition: 0.2s ease;
}
.kb-quiz-option:hover { border-color: var(--kb-tan-border); }
.kb-quiz-option input { margin: 0; }
.kb-quiz-question.kb-correct .kb-quiz-option.kb-right { border-color: #2c6b2f; background: #eaf4ea; }
.kb-quiz-question.kb-incorrect .kb-quiz-option.kb-chosen-wrong { border-color: #a4402f; background: #f7e8e6; }
.kb-quiz-explanation {
  margin-top: 10px;
  font-size: 13px;
  color: var(--kb-gray);
  background: var(--kb-bg);
  padding: 10px 14px;
  border-radius: 6px;
}
.kb-quiz-score {
  margin-top: 20px;
  font-family: "Catamaran", sans-serif;
  font-weight: 700;
  font-size: 18px;
  color: var(--kb-green);
}

/* ---------- FAQ ---------- */
.kb-faq details {
  border-bottom: 1px solid #eee;
  padding: 14px 0;
}
.kb-faq summary {
  cursor: pointer;
  font-weight: 600;
  color: #232323;
  list-style: none;
}
.kb-faq summary::-webkit-details-marker { display: none; }
.kb-faq summary:before { content: "+ "; color: var(--kb-green); font-weight: 700; }
.kb-faq details[open] summary:before { content: "\2212 "; }
.kb-faq p { margin: 10px 0 0; color: #666; }

/* ---------- References ---------- */
.kb-references { padding-left: 18px; }
.kb-references li { color: #555; margin-bottom: 8px; font-size: 14px; }
.kb-references a { color: var(--kb-green); }

/* ---------- CTA ---------- */
.kb-cta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  padding-top: 20px;
  border-top: 1px solid #eee;
}
.btn-transparent-dark {
  color: var(--kb-green);
  border: 1px solid var(--kb-green);
  display: inline-block;
  font-size: 13px;
  letter-spacing: 1px;
  padding: 12px 30px;
  text-transform: uppercase;
  border-radius: 40px;
}
.btn-transparent-dark:hover { background: var(--kb-green); color: #fff; }

/* ---------- Library grid ---------- */
.kb-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 26px;
}
.kb-card {
  display: block;
  background: #fff;
  border: 1px solid #eee;
  border-radius: 8px;
  padding: 24px;
  transition: 0.25s ease;
}
.kb-card:hover { box-shadow: 0 10px 30px rgba(0,0,0,0.08); transform: translateY(-3px); border-color: var(--kb-tan-border); }
.kb-card-meta { display: flex; gap: 8px; margin-bottom: 14px; }
.kb-card h3 { font-size: 18px; color: #232323; margin-bottom: 6px; }
.kb-card-cat { font-size: 12px; text-transform: uppercase; letter-spacing: 1px; color: var(--kb-gold); margin-bottom: 10px; }
.kb-card-excerpt { font-size: 14px; color: var(--kb-gray); }
.kb-card-link { display: inline-block; margin-top: 10px; font-size: 13px; font-weight: 700; color: var(--kb-green); text-transform: uppercase; letter-spacing: 1px; }

/* ---------- Homepage "latest paper" widget ---------- */
.kb-home-widget {
  background: #fff;
  border-radius: 10px;
  overflow: hidden;
}
.kb-home-video { position: relative; padding-bottom: 56.25%; height: 0; background: #000; border-radius: 8px; overflow: hidden; }
.kb-home-video iframe { position: absolute; top: 0; left: 0; width: 100%; height: 100%; border: 0; }
.kb-home-nolink {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  min-height: 220px;
  background: var(--kb-green);
  border-radius: 8px;
}
.kb-home-meta { display: flex; gap: 8px; margin-bottom: 14px; flex-wrap: wrap; }
.kb-home-title { font-size: 22px; color: #232323; margin-bottom: 10px; }
.kb-home-excerpt { color: var(--kb-gray); margin-bottom: 20px; }
.kb-home-actions { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }

/* Robust button styling for links that live inside third-party section
   markup (.service-block etc) — explicit color + background on both the
   element and its visited/hover states so no ambient link CSS can make
   the text match the background. */
a.kb-yt-btn,
a.kb-yt-btn:visited {
  display: inline-block;
  background-color: #000000;
  color: #ffffff !important;
  padding: 12px 28px;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
  border: 1px solid #000000;
}
a.kb-yt-btn:hover, a.kb-yt-btn:focus {
  background-color: #232323;
  color: #ffffff !important;
}
a.kb-explore-btn, a.kb-explore-btn:visited {
  display: inline-block;
  background-color: var(--kb-green);
  color: #ffffff !important;
  padding: 12px 28px;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
  border: 1px solid var(--kb-green);
}
a.kb-explore-btn:hover, a.kb-explore-btn:focus {
  background-color: #142a1d;
  color: #ffffff !important;
}

@media (prefers-reduced-motion: reduce) {
  .kb-flashcard-inner, .kb-card { transition: none; }
}