/* ==========================================================================
   Vinh Food Safety: learn.css (the /learn/ course section)
   Loaded AFTER site.css on learn pages via META "extraCss":["/assets/learn.css"].
   Everything is scoped under .learn- classes plus the page-certificate print
   block at the bottom. Markup contracts live in LEARN-CONVENTIONS.md.
   Tokens come from site.css (:root). Mobile-first; 44px targets; the global
   prefers-reduced-motion rule in site.css already disables the animations
   declared here.
   ========================================================================== */

/* ---------- Hub: module cards grid ---------- */
.learn-modules {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  display: grid;
  gap: 20px;
  grid-template-columns: 1fr;
}
@media (min-width: 760px) { .learn-modules { grid-template-columns: repeat(2, 1fr); } }

.learn-module-card {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 22px;
  box-shadow: var(--shadow);
  max-width: none;
}
.learn-module-num {
  flex: none;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--green);
  color: var(--white);
  border-radius: 50%;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 20px;
}
.learn-module-body { flex: 1; min-width: 0; }
.learn-module-body h3 { font-size: 22px; margin: 2px 0 0.35em; }
.learn-module-body h3 a { color: var(--green); text-decoration: none; }
.learn-module-body h3 a:hover { text-decoration: underline; text-underline-offset: 3px; }
.learn-module-body p { margin-bottom: 0.6em; max-width: none; }
.learn-module-status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin: 0 0 2px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--forest);
}
.learn-module-status::before {
  content: "";
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--forest);
}
.learn-module-meta { font-size: 14px; color: var(--ink-soft); margin-bottom: 0; }

/* Coming-soon state: dashed, sand, no link. The state is always labeled in
   text ("Coming soon"), never color alone. */
.learn-module-card.is-soon {
  background: var(--sand);
  border: 1px dashed var(--line-strong);
  box-shadow: none;
}
.learn-module-card.is-soon .learn-module-num {
  background: transparent;
  border: 2px dashed var(--line-strong);
  color: var(--ink-soft);
}
.learn-module-card.is-soon h3 { color: var(--navy); }
.learn-module-card.is-soon .learn-module-status { color: var(--ink-soft); }
.learn-module-card.is-soon .learn-module-status::before { background: var(--line-strong); }

/* ---------- Hub: certificate teaser ---------- */
.learn-cert-teaser {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px 24px;
  background: var(--white);
  border: 1px solid var(--line);
  border-left: 5px solid var(--green);
  border-radius: var(--radius);
  padding: 24px;
  margin: 2.5rem 0 0;
  box-shadow: var(--shadow);
}
.learn-cert-teaser > svg { width: 44px; height: 44px; flex: none; }
.learn-cert-teaser-body { flex: 1 1 320px; }
.learn-cert-teaser-body h2, .learn-cert-teaser-body h3 { font-size: 22px; margin-bottom: 0.3em; }
.learn-cert-teaser-body p { margin: 0; max-width: var(--measure); }
.learn-cert-teaser .btn { flex: none; }

/* ---------- Story player ----------
   Base styles are the NO-JS fallback: every .learn-beat renders stacked as a
   numbered illustrated sequence. learn.js adds .is-enhanced to .learn-story
   and builds the chrome (caption bar, dots, Back/Next). */
.learn-story { margin: 2.5rem 0; max-width: 760px; }
.learn-story > h2 { margin-bottom: 0.4em; }
.learn-beats {
  list-style: none;
  margin: 1.25rem 0 0;
  padding: 0;
  counter-reset: beat;
}
.learn-beat { counter-increment: beat; margin: 0 0 28px; max-width: none; }
.learn-beat:last-child { margin-bottom: 0; }
.learn-scene {
  margin: 0 0 10px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.learn-scene svg { display: block; width: 100%; height: auto; }
.learn-caption { margin: 0; max-width: var(--measure); }
.learn-caption::before {
  content: "Part " counter(beat);
  display: block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--forest);
  margin-bottom: 2px;
}

/* Enhanced mode: one beat at a time on the stage */
.learn-story.is-enhanced .learn-beats { margin-top: 1rem; }
.learn-story.is-enhanced .learn-beat { display: none; margin: 0; }
.learn-story.is-enhanced .learn-beat.is-active {
  display: block;
  animation: learn-beat-fwd 0.3s ease both;
}
.learn-story.is-enhanced .learn-beat.is-active.is-back { animation-name: learn-beat-back; }
.learn-story.is-enhanced .learn-scene {
  margin-bottom: 0;
  border-radius: var(--radius) var(--radius) 0 0;
  border-bottom: 0;
}
.learn-story.is-enhanced .learn-caption { display: none; }
@keyframes learn-beat-fwd {
  from { opacity: 0; transform: translateX(28px); }
  to { opacity: 1; transform: none; }
}
@keyframes learn-beat-back {
  from { opacity: 0; transform: translateX(-28px); }
  to { opacity: 1; transform: none; }
}

/* Caption bar (built by learn.js, aria-live="polite") */
.learn-caption-bar {
  background: var(--navy);
  color: var(--cream);
  padding: 14px 18px 16px;
  border-radius: 0 0 var(--radius) var(--radius);
  min-height: 5.4em;
  font-size: 17px;
  line-height: 1.5;
}
.learn-caption-kicker {
  display: block;
  color: var(--amber-light);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 3px;
}

/* Controls (built by learn.js): dots row above, Back/Next below */
.learn-player-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-top: 12px;
}
.learn-player-btn { min-width: 104px; }
.learn-player-btn[disabled] {
  opacity: 0.4;
  cursor: default;
  pointer-events: none;
}
.learn-player-dots {
  flex: 1 1 100%;
  order: -1;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0;
  margin: 0 0 2px;
  padding: 0;
}
.learn-player-dot {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 0;
  padding: 0;
  cursor: pointer;
  border-radius: var(--radius);
}
.learn-player-dot::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: transparent;
  border: 2px solid var(--line-strong);
  transition: background-color 0.15s ease, border-color 0.15s ease;
}
.learn-player-dot:hover::before { border-color: var(--green); }
.learn-player-dot.is-current::before {
  background: var(--green);
  border-color: var(--green);
}

/* ---------- Lesson ---------- */
.learn-lesson { margin-top: 2.5rem; }
.learn-takeaways {
  background: var(--tint-green);
  border: 1px solid var(--line);
  border-left: 5px solid var(--green);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin: 1.5rem 0;
  max-width: var(--measure);
}
.learn-takeaways h3, .learn-takeaways h4 { font-size: 20px; margin-bottom: 0.4em; }
.learn-takeaways ul { list-style: none; margin: 0; padding: 0; }
.learn-takeaways li { position: relative; padding-left: 26px; margin-bottom: 0.4em; }
.learn-takeaways li:last-child { margin-bottom: 0; }
.learn-takeaways li::before {
  content: "\2713";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--green);
  font-weight: 700;
}

/* ---------- Self-check quiz ----------
   NO-JS fallback: options ship as disabled buttons and each explanation
   (which begins with "Answer:") is visible, so the block reads as Q and A.
   learn.js enables the options, hides the explanations until a pick, and
   marks correct/incorrect with icon + text, never color alone. */
.learn-quiz {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 26px 24px;
  margin: 2.5rem 0;
  box-shadow: var(--shadow);
  max-width: 760px;
}
.learn-quiz > h2, .learn-quiz > h3 { font-size: 25px; }
.learn-quiz-list { list-style: none; margin: 0; padding: 0; counter-reset: quizq; }
.learn-quiz-q { counter-increment: quizq; max-width: none; margin: 0; }
.learn-quiz-q + .learn-quiz-q {
  margin-top: 26px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}
.learn-quiz-question {
  font-weight: 700;
  font-size: 18px;
  color: var(--navy);
  margin-bottom: 0.8em;
  max-width: none;
}
.learn-quiz-question::before { content: counter(quizq) ". "; color: var(--forest); }
.learn-quiz-options {
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
  display: grid;
  gap: 10px;
}
.learn-quiz-options li { max-width: none; margin: 0; }
.learn-quiz-option {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  min-height: 48px;
  padding: 12px 16px;
  background: var(--cream);
  border: 1.5px solid var(--line-strong);
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.4;
  color: var(--ink);
  text-align: left;
  cursor: pointer;
  transition: border-color 0.15s ease, background-color 0.15s ease;
}
.learn-quiz-option[disabled],
.learn-quiz-option[aria-disabled="true"] { cursor: default; }
.learn-quiz.is-enhanced .learn-quiz-option:not([aria-disabled="true"]):hover {
  border-color: var(--green);
  background: var(--white);
}
/* Answered states. Tint system: green tint for correct, red tint with Brick
   for incorrect; the icon + word mark carries the meaning too. */
.learn-quiz-option.is-correct {
  background: var(--tint-green);
  border: 2px solid var(--green);
  padding: 11.5px 15.5px;
}
.learn-quiz-option.is-incorrect {
  background: var(--tint-red);
  border: 2px solid var(--brick);
  padding: 11.5px 15.5px;
}
.learn-quiz-option.is-reveal {
  border: 2px dashed var(--green);
  padding: 11.5px 15.5px;
}
.learn-quiz-mark {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  flex: none;
  margin-left: auto;
  white-space: nowrap;
}
.learn-quiz-option.is-correct .learn-quiz-mark,
.learn-quiz-option.is-reveal .learn-quiz-mark { color: var(--green); }
.learn-quiz-option.is-incorrect .learn-quiz-mark { color: var(--brick); }
.learn-quiz-mark svg { width: 18px; height: 18px; flex: none; }
.learn-quiz-explain {
  border-left: 4px solid var(--amber);
  padding: 2px 0 2px 14px;
  margin: 0;
  max-width: var(--measure);
}
.learn-quiz-score {
  margin: 24px 0 0;
  padding: 14px 18px;
  background: var(--tint-green);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-weight: 600;
  max-width: none;
}

/* ---------- Certificate page (/learn/certificate/) ---------- */
.learn-cert-tools { margin: 1.5rem 0 0; }
.learn-cert-form { max-width: 440px; }
.learn-cert-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 0 0 1rem; }

/* The sheet: a plain double rule frame. Deliberately no seal, ribbon, or
   badge shape; this must never read as an accreditation or credential. */
.learn-cert {
  background: var(--white);
  border: 3px solid var(--green);
  border-radius: 4px;
  padding: 10px;
  margin: 2rem auto;
  max-width: 920px;
  box-shadow: var(--shadow);
}
.learn-cert-frame {
  border: 1.5px solid var(--amber);
  padding: clamp(28px, 6vw, 60px) clamp(18px, 5vw, 56px);
  text-align: center;
}
.learn-cert-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 26px;
}
.learn-cert-brand svg { width: 40px; height: 40px; flex: none; }
.learn-cert-brand span {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 19px;
  color: var(--navy);
}
.learn-cert-title {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--forest);
  margin: 0 0 10px;
}
.learn-cert-course {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: clamp(27px, 4.5vw, 39px);
  line-height: 1.15;
  color: var(--green);
  margin: 0 auto 26px;
  max-width: 18ch;
}
.learn-cert-presented {
  font-size: 14px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: 0 0 14px;
  max-width: none;
}
.learn-cert-nameline { margin: 0; max-width: none; }
.learn-cert-name {
  display: inline-block;
  min-width: min(440px, 90%);
  min-height: 1.35em;
  padding: 0 18px 8px;
  border-bottom: 1.5px solid var(--line-strong);
  font-family: var(--font-head);
  font-weight: 500;
  font-style: italic;
  font-size: clamp(25px, 4vw, 34px);
  line-height: 1.2;
  color: var(--navy);
}
.learn-cert-for {
  max-width: 52ch;
  margin: 18px auto 0;
  font-size: 16px;
}
.learn-cert-foot {
  display: flex;
  flex-wrap: wrap;
  gap: 28px 48px;
  justify-content: center;
  margin-top: 44px;
}
.learn-cert-foot > div { flex: 1 1 220px; max-width: 300px; }
.learn-cert-value {
  min-height: 1.5em;
  margin: 0 0 4px;
  padding-bottom: 4px;
  border-bottom: 1.5px solid var(--ink);
  font-size: 17px;
  color: var(--ink);
  max-width: none;
}
.learn-cert-sig {
  font-family: var(--font-head);
  font-style: italic;
  font-size: 23px;
  color: var(--navy);
}
.learn-cert-label {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  max-width: none;
}
.learn-cert-disclaimer {
  margin: 34px auto 0;
  max-width: 62ch;
  font-size: 13px;
  color: var(--ink-soft);
}

/* ---------- Print ---------- */
@media print {
  /* A module page printed whole reads as the stacked no-JS sequence. */
  .learn-story.is-enhanced .learn-beat {
    display: block !important;
    margin-bottom: 20px;
  }
  .learn-story.is-enhanced .learn-caption { display: block !important; }
  .learn-story.is-enhanced .learn-scene {
    margin-bottom: 10px;
    border-radius: var(--radius);
    border-bottom: 1px solid #000;
  }
  .learn-caption-bar, .learn-player-controls { display: none !important; }
  .learn-scene, .learn-module-card, .learn-quiz { border-color: #000; }
  .learn-module-card, .learn-quiz, .learn-cert, .learn-cert-teaser { box-shadow: none; break-inside: avoid; }
  /* On paper the self-check reads as Q and A: show the answers. */
  .learn-quiz-explain[hidden] { display: block !important; }

  /* Certificate page: the sheet is the only thing that prints.
     The @page landscape rule lives in the certificate fragment's own
     <style>, so it cannot leak onto other learn pages. */
  .page-certificate .site-header,
  .page-certificate .site-footer,
  .page-certificate .cta-band,
  .page-certificate .mobile-cta-bar,
  .page-certificate .learn-cert-intro,
  .page-certificate .learn-cert-tools,
  .page-certificate .learn-cert-backlink { display: none !important; }
  .page-certificate .section, .page-certificate .hero { padding: 0; }
  .page-certificate .container { max-width: none; padding: 0; }
  .learn-cert {
    margin: 0 auto;
    max-width: none;
    border: 3px solid var(--green);
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }
}