@import url('https://fonts.googleapis.com/css2?family=PT+Serif:wght@400;700&family=PT+Sans:wght@400;700&display=swap');

:root{
  --bg: #FAF6EE;
  --paper: #FFFFFF;
  --ink: #2B2620;
  --ink-soft: #5C5348;
  --teal: #1F4B3F;
  --teal-dark: #143229;
  --gold: #C98A3D;
  --gold-soft: #F1E0C4;
  --line: #E1D8C4;
  --radius: 14px;
  --serif: 'PT Serif', Georgia, 'Times New Roman', serif;
  --sans: 'PT Sans', -apple-system, Segoe UI, Arial, sans-serif;
}

*{ box-sizing: border-box; }

html{ scroll-behavior: smooth; }

body{
  margin:0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 19px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a{ color: var(--teal); }
a:focus-visible, button:focus-visible{ outline: 3px solid var(--gold); outline-offset: 2px; }

.topbar{
  background: var(--teal);
  color: #F4EFE2;
  padding: 14px 20px;
}
.topbar-inner{
  max-width: 800px;
  margin: 0 auto;
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.topbar a{ color:#F4EFE2; text-decoration:none; font-family: var(--serif); font-size: 1.05rem; font-weight: 700; }
.topbar .progress{ font-size: 0.9rem; color:#CFE3DB; font-family: var(--sans); }

.wrap{ max-width: 800px; margin: 0 auto; padding: 34px 20px 80px; }

.eyebrow{
  display:inline-block;
  font-family: var(--sans);
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--teal);
  background: var(--gold-soft);
  border-radius: 999px;
  padding: 5px 14px;
  margin-bottom: 16px;
}

.hero{ display:flex; gap:20px; align-items:flex-start; margin-bottom: 8px; }
.hero .num{
  font-family: var(--serif);
  font-weight: 700;
  font-size: 3.2rem;
  color: var(--gold);
  line-height: 1;
  min-width: 64px;
}
h1{
  font-family: var(--serif);
  font-size: 2rem;
  line-height: 1.2;
  margin: 0 0 6px;
  color: var(--teal-dark);
}
.block-tag{ color: var(--ink-soft); font-size: 0.95rem; margin: 0 0 30px; }

.card{
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 30px;
  margin-bottom: 26px;
  box-shadow: 0 1px 2px rgba(43,38,32,0.04);
}
.card h2{
  font-family: var(--serif);
  font-size: 1.35rem;
  margin: 0 0 18px;
  color: var(--teal-dark);
  display:flex;
  align-items:center;
  gap:10px;
}
.card h2 .ic{ font-size: 1.2rem; }

.hook{
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.15rem;
  color: var(--teal-dark);
  border-left: 3px solid var(--gold);
  padding: 4px 0 4px 18px;
  margin: 0 0 22px;
}

.material p{ margin: 0 0 14px; }
.material ul, .material ol{ margin: 0 0 14px; padding-left: 24px; }
.material li{ margin-bottom: 6px; }
.material strong{ color: var(--teal-dark); }

.terms{
  background: var(--bg);
  border-radius: 10px;
  padding: 16px 20px;
  font-size: 0.97rem;
  color: var(--ink-soft);
}
.terms strong{ color: var(--teal-dark); }

.question{
  border-radius: 10px;
  background: var(--gold-soft);
  padding: 18px 22px;
  margin-top: 4px;
}
.question .qlabel{
  font-weight: 700;
  color: var(--teal-dark);
  display:block;
  margin-bottom: 6px;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: .04em;
}
.question em{ color: var(--ink-soft); }

.audio-card audio{ width: 100%; margin-top: 4px; }
.audio-note{ font-size: 0.88rem; color: var(--ink-soft); margin-top: 10px; }
.audio-note code{ background: var(--bg); padding: 1px 6px; border-radius: 4px; }

.download-btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  background: var(--teal);
  color: #fff;
  text-decoration:none;
  padding: 11px 20px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 22px;
}
.download-btn:hover{ background: var(--teal-dark); }

.source-content{ font-size: 0.96rem; color: var(--ink-soft); }
.source-content h1, .source-content h2, .source-content h3{
  font-family: var(--serif);
  color: var(--teal-dark);
  font-size: 1.05rem;
}
.source-content p{ margin: 0 0 12px; }
.source-content ul, .source-content ol{ padding-left: 22px; margin: 0 0 12px; }
.source-content li{ margin-bottom: 5px; }
.source-content table{
  border-collapse: collapse;
  width: 100%;
  margin: 14px 0 20px;
  font-size: 0.88rem;
}
.source-content th, .source-content td{
  border: 1px solid var(--line);
  padding: 6px 9px;
  text-align: left;
}
.source-content th{ background: var(--bg); }
.source-content img{ max-width: 100%; height: auto; border-radius: 8px; margin: 10px 0; }
.source-content strong{ color: var(--teal-dark); }
.source-content p.part-divider{
  font-family: var(--sans);
  font-weight: 700;
  color: var(--teal-dark);
  border-top: 2px solid var(--gold);
  padding-top: 10px;
  margin-top: 22px;
  font-size: 1rem;
}

details.source-toggle summary{
  cursor: pointer;
  font-weight: 700;
  color: var(--teal);
  list-style: none;
  padding: 4px 0;
}
details.source-toggle summary::-webkit-details-marker{ display:none; }
details.source-toggle summary::before{ content: "▸ "; color: var(--gold); }
details.source-toggle[open] summary::before{ content: "▾ "; }
details.source-toggle{ margin-top: 6px; }

.nav-buttons{
  display:flex;
  justify-content: space-between;
  gap: 14px;
  margin-top: 34px;
}
.nav-btn{
  flex:1;
  text-decoration:none;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px 18px;
  color: var(--teal-dark);
  font-family: var(--sans);
}
.nav-btn:hover{ border-color: var(--teal); }
.nav-btn .lbl{ display:block; font-size: 0.78rem; color: var(--ink-soft); text-transform: uppercase; letter-spacing: .04em; margin-bottom: 4px;}
.nav-btn .ttl{ font-weight: 700; }
.nav-btn.next{ text-align: right; }
.nav-btn.disabled{ opacity: 0.35; pointer-events: none; }

.all-link{ text-align:center; margin-top: 18px; }
.all-link a{ text-decoration:none; font-size: 0.92rem; }

/* Index page */
.index-hero{ text-align:center; padding: 50px 20px 20px; }
.index-hero h1{ font-size: 2.3rem; }
.index-hero p{ color: var(--ink-soft); max-width: 560px; margin: 10px auto 0; }

.block-group{ margin: 34px 0; }
.block-title{
  font-family: var(--serif);
  color: var(--teal-dark);
  font-size: 1.1rem;
  border-bottom: 2px solid var(--gold-soft);
  padding-bottom: 8px;
  margin-bottom: 14px;
}
.lesson-grid{ display:grid; grid-template-columns: repeat(auto-fill, minmax(220px,1fr)); gap: 12px; }
.lesson-card{
  display:flex;
  gap:12px;
  align-items:flex-start;
  text-decoration:none;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px 16px;
  color: var(--ink);
}
.lesson-card:hover{ border-color: var(--teal); }
.lesson-card.disabled{
  opacity: 0.4;
  pointer-events: none;
}
.lesson-card.disabled:hover{ border-color: var(--line); }
.lesson-card .lnum{ font-family: var(--serif); font-weight:700; color: var(--gold); font-size:1.3rem; min-width: 28px; }
.lesson-card .ltitle{ font-size: 0.94rem; line-height:1.35; }

footer.site-footer{
  text-align:center;
  color: var(--ink-soft);
  font-size: 0.85rem;
  padding: 30px 20px 50px;
}

@media (max-width: 560px){
  body{ font-size: 17.5px; }
  .card{ padding: 20px 18px; }
  h1{ font-size: 1.6rem; }
  .hero .num{ font-size: 2.4rem; min-width: 46px; }
  .nav-buttons{ flex-direction: column; }
  .nav-btn.next{ text-align:left; }
}