/* Education detail pages — extends styles.css (same warm-editorial tokens). */

.edu-main { display: block; }

/* --- Hero --- */
.edu-hero {
  position: relative;
  padding: 120px 40px 40px;
  max-width: 980px;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 26px;
  font-size: 13px;
  color: var(--ink-55);
}
.breadcrumb a { text-decoration: underline; text-decoration-color: transparent; text-underline-offset: 4px; transition: .18s ease; }
.breadcrumb a:hover { text-decoration-color: var(--ink); color: var(--ink); }
.breadcrumb .sep { color: var(--ink-40); }
.edu-hero h1 { font-size: clamp(40px, 5.4vw, 60px); margin-bottom: 18px; max-width: 820px; }
.edu-hero .hero-subhead { max-width: 720px; }
.edu-meta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.edu-meta span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 9999px;
  background: rgba(247,244,237,.72);
  color: var(--muted);
  font-size: 13px;
}
.edu-meta span b { color: var(--ink); font-weight: 600; }

/* --- Video --- */
.edu-video { padding: 16px 40px 28px; }
.video-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  border-radius: var(--radius-container);
  overflow: hidden;
  background: #14110d;
}
.video-frame iframe,
.video-frame video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
  object-fit: cover;
  background: #14110d;
}
/* Placeholder shown until the generated video is embedded. */
.video-frame.is-placeholder { cursor: default; }
.video-frame .poster {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .5;
  filter: grayscale(.1) saturate(.85) contrast(.96);
}
.video-frame .poster-veil {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(20,17,13,.18), rgba(20,17,13,.62));
}
.video-frame .poster-inner {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  text-align: center;
  color: var(--cream-soft);
  padding: 24px;
}
.video-frame .play-icon {
  width: 76px;
  height: 76px;
  border-radius: 9999px;
  display: grid;
  place-items: center;
  background: rgba(252,251,248,.94);
  color: var(--ink);
  font-size: 22px;
  box-shadow: var(--button-inset);
}
.video-frame .poster-inner small { color: rgba(252,251,248,.82); font-size: 13px; letter-spacing: .2px; }
.video-frame .poster-inner strong { font-weight: 600; font-size: 17px; }
.video-frame .badge-soon {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: rgba(252,251,248,.7);
  border: 1px solid rgba(252,251,248,.3);
  border-radius: 9999px;
  padding: 4px 10px;
}
.edu-video figcaption { margin-top: 12px; color: var(--ink-55); font-size: 13px; text-align: center; }

/* --- Generic section --- */
.edu-section { padding: 48px 40px; }
.edu-section.tight { padding: 28px 40px; }
.edu-lede {
  max-width: 860px;
  font-size: clamp(20px, 2.4vw, 26px);
  line-height: 1.42;
  color: var(--ink-83);
  font-weight: 400;
  letter-spacing: -0.3px;
}
.edu-lede strong { color: var(--ink); font-weight: 600; }

.edu-split { display: grid; grid-template-columns: .82fr 1.18fr; gap: 42px; align-items: start; }
.edu-split .text-card { padding: 30px; }
.edu-split .text-card p:last-child { margin-bottom: 0; }
.edu-figure { border: 1px solid var(--line); border-radius: var(--radius-container); overflow: hidden; background: var(--cream); }
.edu-figure img { width: 100%; height: 100%; max-height: 360px; object-fit: cover; opacity: .82; filter: grayscale(.06) saturate(.82) contrast(.95); }

/* --- Concepts --- */
.concept-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.concept-card {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  background: rgba(247,244,237,.72);
}
.concept-card .num {
  display: inline-grid;
  place-items: center;
  width: 34px; height: 34px;
  border-radius: 9999px;
  background: var(--ink);
  color: var(--cream-soft);
  font-size: 14px; font-weight: 600;
  margin-bottom: 16px;
  box-shadow: var(--button-inset);
}
.concept-card h3 { font-weight: 600; margin-bottom: 8px; }
.concept-card p { margin-bottom: 0; font-size: 15px; }

/* --- Action steps --- */
.steps { list-style: none; counter-reset: step; padding: 0; margin: 0; display: grid; gap: 12px; }
.steps li {
  counter-increment: step;
  position: relative;
  padding: 20px 22px 20px 64px;
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  background: var(--cream-soft);
}
.steps li::before {
  content: counter(step);
  position: absolute;
  left: 20px; top: 18px;
  width: 30px; height: 30px;
  border-radius: 9999px;
  display: grid; place-items: center;
  background: var(--green);
  color: var(--cream-soft);
  font-size: 14px; font-weight: 600;
}
.steps li strong { display: block; color: var(--ink); font-weight: 600; margin-bottom: 4px; }
.steps li p { margin: 0; font-size: 15px; }

/* --- Mistakes --- */
.mistake-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.mistake-list li {
  position: relative;
  padding: 16px 18px 16px 50px;
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  background: rgba(247,244,237,.66);
  color: var(--muted);
  line-height: 1.5;
}
.mistake-list li::before {
  content: "✕";
  position: absolute;
  left: 16px; top: 15px;
  width: 22px; height: 22px;
  border-radius: 9999px;
  display: grid; place-items: center;
  background: rgba(186,122,42,.14);
  color: var(--green);
  font-size: 12px; font-weight: 700;
}
.mistake-list li b { color: var(--ink); font-weight: 600; }

/* --- FAQ --- */
.faq { display: grid; gap: 10px; max-width: 900px; }
.faq details {
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  background: var(--cream-soft);
  padding: 4px 20px;
}
.faq summary {
  list-style: none;
  cursor: pointer;
  padding: 16px 0;
  font-weight: 600;
  color: var(--ink);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--green); font-size: 22px; font-weight: 400; transition: transform .2s ease; }
.faq details[open] summary::after { content: "−"; }
.faq details p { margin: 0 0 18px; font-size: 15px; }

/* --- CTA band + foundation nav --- */
.edu-cta {
  margin: 24px 40px;
  border: 1px solid var(--line);
  border-radius: var(--radius-container);
  padding: 44px 40px;
  background: radial-gradient(circle at 88% 12%, rgba(47,141,104,.12), transparent 22rem), var(--cream-soft);
  box-shadow: var(--shadow);
  text-align: center;
}
.edu-cta h2 { margin-bottom: 14px; }
.edu-cta p { max-width: 600px; margin: 0 auto 26px; }

.foundation-nav { padding: 8px 40px 56px; }
.foundation-nav h4 { font-size: 14px; font-weight: 600; color: var(--ink); margin: 0 0 16px; }
.foundation-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.foundation-grid a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  background: rgba(247,244,237,.66);
  transition: .18s ease;
}
.foundation-grid a:hover { border-color: var(--ink-40); box-shadow: var(--focus); background: var(--cream-soft); }
.foundation-grid a.current { outline: 1px solid var(--ink-40); background: var(--cream-soft); }
.foundation-grid .fn-num { color: var(--green); font-size: 13px; font-weight: 600; min-width: 20px; }
.foundation-grid .fn-title { color: var(--ink); font-size: 14px; font-weight: 600; }

@media (max-width: 1080px) {
  .edu-split { grid-template-columns: 1fr; }
  .concept-grid { grid-template-columns: repeat(2, 1fr); }
  .foundation-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  .edu-hero { padding: 100px 18px 28px; }
  .edu-video { padding: 12px 18px 24px; }
  .edu-section, .edu-section.tight { padding: 40px 18px; }
  .concept-grid, .foundation-grid { grid-template-columns: 1fr; }
  .edu-cta { margin: 20px 18px; padding: 32px 22px; }
  .foundation-nav { padding: 8px 18px 44px; }
  .steps li { padding: 18px 18px 18px 58px; }
}