/* ============================================================
   one之教会 · 新人课程阅读器样式(配合 styles.css 的设计变量)
   ============================================================ */

.nav-back { color: var(--muted); font-size: .92rem; transition: color .2s; }
.nav-back:hover { color: var(--gold-bright); }

.course-top {
  padding: calc(var(--header-h) + 40px) 0 28px;
  background: linear-gradient(180deg, var(--ink-2), var(--ink));
  border-bottom: 1px solid var(--gold-line);
}
.course-tabs { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 22px; }
.course-tab {
  display: inline-flex; align-items: center; padding: 8px 16px; border-radius: 999px;
  border: 1px solid var(--gold-line); color: var(--muted); font-size: .9rem; transition: all .2s;
}
.course-tab:hover { color: var(--gold-bright); border-color: var(--gold); }
.course-tab.active { background: var(--gold); color: var(--ink); border-color: var(--gold); font-weight: 600; }

.course-top .kicker { color: var(--gold); letter-spacing: 3px; text-transform: uppercase; font-size: .8rem; margin-bottom: 10px; }
.course-top h1 { font-family: var(--serif-cn); font-size: clamp(1.8rem, 4vw, 2.6rem); margin-bottom: 10px; }
html[lang="en"] .course-top h1 { font-family: var(--serif-en); }
.course-top p { color: var(--muted); max-width: 680px; }

/* 进度条 */
.progress-wrap { margin-top: 22px; max-width: 520px; }
.progress-line { display: flex; justify-content: space-between; font-size: .82rem; color: var(--muted); margin-bottom: 8px; }
.progress-bar { height: 8px; border-radius: 999px; background: rgba(227,192,122,.16); overflow: hidden; }
.progress-bar > i { display: block; height: 100%; width: 0; border-radius: 999px; background: linear-gradient(90deg, var(--gold), var(--gold-bright)); transition: width .5s ease; }

/* 主体:目录 + 内容 */
.course-shell { display: grid; grid-template-columns: 300px 1fr; gap: 44px; padding: 40px 0 80px; align-items: start; }

/* 侧边目录 */
.toc { position: sticky; top: calc(var(--header-h) + 16px); max-height: calc(100vh - var(--header-h) - 32px); overflow-y: auto; padding-right: 6px; }
.toc-module { margin-bottom: 22px; }
.toc-module > h4 { font-size: .76rem; letter-spacing: 1.5px; text-transform: uppercase; color: var(--gold); margin-bottom: 4px; }
.toc-module > .msub { font-size: .76rem; color: var(--muted-2); margin-bottom: 10px; }
.toc-list { list-style: none; display: grid; gap: 2px; }
.toc-list a {
  display: flex; align-items: center; gap: 10px; padding: 8px 12px; border-radius: 10px;
  color: var(--muted); font-size: .9rem; line-height: 1.4; transition: background .18s, color .18s;
}
.toc-list a:hover { background: var(--gold-soft); color: var(--text); }
.toc-list a.active { background: var(--gold-soft); color: var(--gold-bright); font-weight: 600; }
.toc-list a .tnum {
  flex: none; width: 24px; height: 24px; border-radius: 50%; display: grid; place-items: center;
  font-family: var(--serif-en); font-size: .8rem; border: 1px solid var(--gold-line); color: var(--gold);
}
.toc-list a.active .tnum { background: var(--gold); color: var(--ink); border-color: var(--gold); }
.toc-list a.done .tnum { background: rgba(227,192,122,.25); }
.toc-list a.done .tnum::after { content: "✓"; }
.toc-list a.done .tnum span { display: none; }
.toc-list a.locked { opacity: .45; }
.toc-list a.locked .tnum { border-style: dashed; }
.toc-list a.locked .tnum::after { content: "🔒"; font-size: .64rem; }
.toc-list a.locked .tnum span { display: none; }

/* 锁定课的占位视图 */
.lesson-locked { text-align: center; padding: 56px 24px; }
.lesson-locked .lock-ic { font-size: 2.4rem; margin-bottom: 14px; opacity: .8; }
.lesson-locked p { color: var(--muted); font-size: 1.05rem; margin-bottom: 22px; }

/* 解锁提示(在 lesson-actions 内换行显示) */
.nav-hint { flex-basis: 100%; order: 3; color: var(--muted-2); font-size: .82rem; margin-top: 4px; }
.nav-hint:empty { display: none; }

/* 内容区 */
.lesson { max-width: 760px; }
.lesson-head { margin-bottom: 26px; padding-bottom: 22px; border-bottom: 1px solid var(--gold-line); }
.lesson-head .crumb { font-size: .82rem; color: var(--gold); letter-spacing: 1px; margin-bottom: 10px; }
.lesson-head h2 { font-family: var(--serif-cn); font-size: clamp(1.7rem, 3.4vw, 2.3rem); line-height: 1.25; }
.lesson-head .meta { margin-top: 12px; color: var(--muted-2); font-size: .85rem; display: flex; gap: 16px; flex-wrap: wrap; }

/* 课程正文(片段渲染) */
.lesson-body { font-size: 1.05rem; line-height: 1.9; color: #d9dcee; }
.lesson-body .lesson-note { font-size: .85rem; color: var(--muted-2); font-style: italic; border-left: 2px solid var(--gold-line); padding: 4px 0 4px 12px; margin-bottom: 18px; }
.lesson-body .lesson-lead { font-family: var(--serif-cn); font-size: 1.22rem; color: var(--gold-bright); line-height: 1.7; margin-bottom: 26px; }
.lesson-body h2 { font-family: var(--serif-cn); font-size: 1.4rem; color: var(--text); margin: 34px 0 12px; }
.lesson-body h3 { font-size: 1.05rem; color: var(--text); margin: 0 0 10px; }
.lesson-body p { margin-bottom: 16px; }
.lesson-body .lesson-points {
  background: linear-gradient(160deg, var(--panel), var(--ink-2)); border: 1px solid var(--gold-line);
  border-radius: 14px; padding: 22px 24px; margin: 24px 0;
}
.lesson-body .lesson-points ul { margin: 0; padding-left: 0; list-style: none; display: grid; gap: 9px; }
.lesson-body .lesson-points li { position: relative; padding-left: 24px; color: var(--muted); }
.lesson-body .lesson-points li::before { content: "◆"; position: absolute; left: 0; color: var(--gold); font-size: .72rem; top: .35em; }
.lesson-body blockquote.scripture {
  margin: 22px 0; padding: 18px 22px; border-left: 3px solid var(--gold);
  background: var(--gold-soft); border-radius: 0 12px 12px 0;
}
.lesson-body blockquote.scripture p { font-family: var(--serif-cn); color: var(--gold-bright); font-size: 1.08rem; margin-bottom: 8px; }
.lesson-body blockquote.scripture cite { font-style: normal; font-size: .82rem; color: var(--muted); }
.lesson-body .lesson-takeaway {
  margin: 30px 0; padding: 24px; border-radius: 14px; text-align: center;
  background: var(--cream); color: #2c2a22;
}
.lesson-body .lesson-takeaway h3 { color: #8a7338; letter-spacing: 1px; font-size: .8rem; text-transform: uppercase; margin-bottom: 8px; }
.lesson-body .lesson-takeaway p { font-family: var(--serif-cn); font-size: 1.2rem; line-height: 1.7; margin: 0; }
.lesson-body .lesson-reflect {
  margin: 26px 0; padding: 20px 22px; border: 1px dashed var(--gold-line); border-radius: 14px; background: rgba(227,192,122,.05);
}
.lesson-body .lesson-reflect h3 { color: var(--gold); margin-bottom: 8px; }
.lesson-body .lesson-reflect p { color: var(--muted); margin: 0; }

/* 上一课/下一课 + 完成 */
.lesson-actions { margin-top: 36px; padding-top: 26px; border-top: 1px solid var(--gold-line); display: flex; flex-wrap: wrap; gap: 14px; align-items: center; justify-content: space-between; }
.lesson-nav { display: flex; gap: 12px; flex-wrap: wrap; }
.lesson-nav .btn[disabled] { opacity: .35; pointer-events: none; }
.mark-done { display: inline-flex; align-items: center; gap: 8px; }

/* 课后社群引导 */
.lesson-join {
  margin-top: 30px; padding: 22px 24px; border-radius: 14px; border: 1px solid var(--gold-line);
  background: linear-gradient(135deg, rgba(227,192,122,.12), rgba(227,192,122,.03));
  display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap;
}
.lesson-join p { color: var(--muted); font-size: .95rem; }
.lesson-join p b { color: var(--text); }

/* 移动端目录开关 */
.toc-toggle { display: none; }

@media (max-width: 920px) {
  .course-shell { grid-template-columns: 1fr; gap: 20px; }
  .toc {
    position: static; max-height: none; order: -1;
    border: 1px solid var(--gold-line); border-radius: 14px; padding: 16px; background: var(--ink-2);
  }
  .toc.collapsed .toc-inner { display: none; }
  .toc-toggle {
    display: flex; align-items: center; justify-content: space-between; width: 100%;
    background: none; border: 0; color: var(--text); font-family: var(--sans); font-size: 1rem; cursor: pointer; padding: 0;
  }
  .toc-toggle .chev { transition: transform .2s; color: var(--gold); }
  .toc.collapsed .toc-toggle .chev { transform: rotate(-90deg); }
  .toc-inner { margin-top: 14px; }
}