:root {
  color-scheme: light;
  --bg: #f6f3ec;
  --card: #fffdf8;
  --ink: #20242c;
  --muted: #6d727d;
  --green: #2f6f4f;
  --blue: #2d6d86;
  --shadow: 0 10px 30px rgba(35, 40, 50, .08);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, "Noto Sans SC", "Segoe UI", sans-serif;
}

.site-header {
  display: flex;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  padding: 1.2rem max(1rem, calc((100vw - 1180px) / 2));
  background: #fffdf8;
  box-shadow: var(--shadow);
}
.brand {
  color: var(--ink);
  font-size: 1.6rem;
  font-weight: 800;
  text-decoration: none;
}
.brand span { color: var(--green); font-size: .8rem; margin-left: .3rem; }
.search-form { display: flex; width: min(420px, 100%); }
.search-form input {
  width: 100%;
  padding: .7rem .9rem;
  border: 1px solid #d8d2c5;
  border-right: 0;
  border-radius: .7rem 0 0 .7rem;
  background: #fff;
}
.search-form button {
  border: 0;
  padding: 0 1.1rem;
  color: #fff;
  background: var(--green);
  border-radius: 0 .7rem .7rem 0;
}

.container { width: min(1180px, calc(100% - 2rem)); margin: 2rem auto 4rem; }
.hero h1, .lesson-heading h1 { margin: 0 0 .5rem; }
.lead { color: var(--muted); font-size: 1.1rem; }
.muted { color: var(--muted); }
.filters { display: flex; gap: .6rem; margin-top: 1.2rem; }
.pill {
  padding: .45rem 1rem;
  border-radius: 999px;
  background: #fff;
  color: var(--ink);
  text-decoration: none;
  border: 1px solid #d8d2c5;
}
.pill.active { background: var(--green); color: #fff; border-color: var(--green); }

.lesson-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.2rem;
  margin-top: 1.5rem;
}
.lesson-card {
  display: flex;
  flex-direction: column;
  padding: 1.2rem;
  background: var(--card);
  border-radius: 1rem;
  box-shadow: var(--shadow);
}
.card-meta { display: flex; gap: .5rem; align-items: center; margin-bottom: .6rem; color: var(--muted); font-weight: 600; }
.level-badge {
  padding: .15rem .45rem;
  border-radius: .3rem;
  color: #fff;
  background: var(--blue);
  font-size: .75rem;
}
.lesson-card h2 { font-size: 1.12rem; line-height: 1.35; margin: 0 0 .5rem; }
.lesson-card h2 a { color: inherit; text-decoration: none; }
.lesson-card p { display: -webkit-box; overflow: hidden; -webkit-line-clamp: 3; -webkit-box-orient: vertical; }
.lesson-card audio, .player audio { width: 100%; margin-top: auto; }
.text-link { margin-top: .7rem; color: var(--green); }

.notice {
  padding: 1rem;
  border-radius: .7rem;
  background: #fff3cd;
  border: 1px solid #e5c76b;
}
.pagination { display: flex; justify-content: center; align-items: center; gap: 1rem; margin-top: 2rem; }
.pagination a { color: var(--green); }
.back-link { color: var(--green); }
.lesson-detail, .transcript {
  padding: clamp(1rem, 4vw, 2.2rem);
  background: var(--card);
  border-radius: 1rem;
  box-shadow: var(--shadow);
}
.lesson-detail { margin-bottom: 1.5rem; }
.player { margin-top: 1.4rem; }
.source-links { display: flex; gap: 1rem; margin-top: .7rem; }
.transcript .track {
  padding-bottom: 1.4rem;
  margin-bottom: 1.4rem;
  border-bottom: 1px solid #e6e0d4;
}
.transcript .track:last-child { margin-bottom: 0; border-bottom: 0; }
.transcript .track h3 { margin: 0 0 .7rem; font-size: 1.05rem; }
.transcript p { line-height: 1.8; }
.transcript h2 { margin-top: 0; }
.site-footer {
  padding: 1rem max(1rem, calc((100vw - 1180px) / 2));
  color: var(--muted);
  background: #fffdf8;
}
.site-footer a { color: var(--green); }

@media (max-width: 880px) {
  .site-header { align-items: stretch; flex-direction: column; }
  .lesson-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 620px) {
  .lesson-grid { grid-template-columns: 1fr; }
}