/* 📚 AI 商業學院（東霖課程平台） — 共用樣式
   受眾 50 歲以上：內文 18px、次要文字都用深色、唔用 hover 效果、撳掣最少 52px 高 */
:root{
  --bg:#FFFFFF;
  --ink:#161412;
  --ink-2:#3B3631;      /* 次要文字：仍然夠深，唔用灰 */
  --line:#E4E8E5;
  --accent:#0F3D2E;
  --accent-deep:#0A2A20;
  --accent-soft:#EEF3EF;
  --card:#FFFFFF;
  --ok:#8C6A2E;
  --ok-soft:#F8F1E3;
  --err:#9E1F14;
  --err-soft:#FDE7E3;
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang TC","PingFang HK","Noto Sans TC","Microsoft JhengHei",sans-serif;
  background:var(--bg);color:var(--ink);
  font-size:18px;line-height:1.75;
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
}
a{color:var(--accent-deep);font-weight:700}
button{font-family:inherit}

.wrap{max-width:760px;margin:0 auto;padding:0 18px}

/* 頂 bar */
.topbar{background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;min-height:62px;gap:12px}
.brand{font-weight:800;font-size:18px;letter-spacing:-.01em;color:var(--ink);text-decoration:none}
.brand span{color:var(--accent)}
.btn-text{
  background:none;border:1.5px solid var(--line);border-radius:10px;
  font-size:16px;font-weight:700;color:var(--ink);padding:10px 16px;min-height:46px;cursor:pointer;
}
.btn-text:active{background:var(--accent-soft)}

main{padding:28px 0 64px}
h1{font-size:clamp(28px,6vw,36px);font-weight:800;line-height:1.3;letter-spacing:-.02em;margin-bottom:10px}
h2{font-size:clamp(22px,4.8vw,26px);font-weight:800;line-height:1.4;margin-bottom:8px}
.lede{font-size:18px;color:var(--ink-2);margin-bottom:24px}

.card{background:var(--card);border:1.5px solid var(--line);border-radius:18px;padding:24px 20px;margin-bottom:18px}

/* 表單 */
label{display:block;font-weight:800;font-size:18px;margin:18px 0 8px}
input{
  width:100%;font-size:22px;font-family:inherit;font-weight:600;letter-spacing:.04em;
  padding:14px 16px;min-height:60px;border:2px solid #B7C2BC;border-radius:12px;background:#fff;color:var(--ink);
}
input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}
.hint{font-size:16px;color:var(--ink-2);margin-top:6px}

.btn{
  display:flex;align-items:center;justify-content:center;gap:8px;width:100%;
  min-height:60px;padding:14px 20px;border-radius:14px;border:2px solid transparent;
  font-size:20px;font-weight:800;text-decoration:none;cursor:pointer;
  transition:transform .1s;
}
.btn:active{transform:scale(.98)}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:active{background:var(--accent-deep)}
.btn-primary[disabled]{background:#C9A79C;cursor:wait}
.btn-ghost{background:var(--card);color:var(--ink);border-color:#B7C2BC}
.btn-ghost:active{background:var(--accent-soft)}
/* 第一課冇「上一課」、最後一課冇「下一課」：淡底但字仍然夠深 */
.nav-row .btn[disabled]{color:#5A5249;border-color:var(--line);background:#EEF1EF;cursor:default}
.btn-done{background:var(--ok-soft);color:var(--ok);border-color:var(--ok)}

.alert{
  display:none;margin-top:18px;padding:14px 16px;border-radius:12px;
  background:var(--err-soft);color:var(--err);font-weight:700;font-size:17px;border:1.5px solid #F2B8AE;
}
.alert.show{display:block}

.help{margin-top:22px;font-size:17px;color:var(--ink-2)}

/* 我的課程 */
.course-card h2{margin-bottom:4px}
.course-card .sub{color:var(--ink-2);font-size:17px;margin-bottom:14px}
.progress{height:12px;background:#EEF1EF;border-radius:99px;overflow:hidden;margin:6px 0 8px}
.progress i{display:block;height:100%;background:var(--ok);border-radius:99px;width:0}
.progress-text{font-size:17px;font-weight:700;color:var(--ink-2);margin-bottom:16px}

/* 課程頁 */
.back{display:inline-flex;align-items:center;min-height:48px;font-size:18px;text-decoration:none;margin-bottom:6px}
.player{position:relative;width:100%;aspect-ratio:16/9;background:#000;border-radius:14px;overflow:hidden;margin:14px 0 18px}
.player iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.player.has-img{background:var(--bg);aspect-ratio:auto}
.player .empty{
  position:absolute;inset:0;display:flex;align-items:center;justify-content:center;text-align:center;
  color:#FFF6EA;font-size:18px;font-weight:700;padding:20px;line-height:1.6;
}
.lesson-tag{display:inline-block;font-size:15px;font-weight:800;color:var(--accent-deep);background:var(--accent-soft);padding:3px 12px;border-radius:99px;margin-bottom:8px}
.lesson-meta{font-size:17px;color:var(--ink-2);font-weight:600;margin-bottom:10px}
.lesson-desc{white-space:pre-wrap;font-size:18px;margin-bottom:18px}
.materials{display:flex;flex-direction:column;gap:10px;margin-bottom:18px}
.course-card .materials{margin:12px 0 0}

/* 學習路線圖（我的課程頂部） */
.path-card h2{margin-bottom:4px}
.path-card .sub{color:var(--ink-2);font-size:17px;margin-bottom:14px}
.path-list{list-style:none;display:flex;flex-direction:column;gap:10px}
.path-item{
  display:flex;align-items:center;gap:14px;padding:12px 14px;min-height:64px;border-radius:14px;
  border:2px solid var(--line);background:#fff;color:var(--ink);text-decoration:none;font-weight:700;
}
a.path-item:active{background:var(--accent-soft)}
.path-item .num{
  flex:0 0 40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:17px;background:#EEF1EF;color:var(--ink);
}
.path-item .t{flex:1;line-height:1.5;font-size:17px}
.path-item .d{display:block;font-size:16px;font-weight:600;color:var(--ink-2)}
.path-item.current{border-color:var(--accent);background:#F6F8F6}
.path-item.current .num{background:var(--accent);color:#fff}
.path-item.done .num{background:var(--ok);color:#fff}
.path-item.locked{background:#EEF1EF}
.materials .btn{border-color:var(--accent);color:var(--accent-deep)}
.nav-row{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:12px}
.nav-row .btn{font-size:18px}

.list-title{font-size:20px;font-weight:800;margin:34px 0 12px}
.lesson-list{list-style:none;display:flex;flex-direction:column;gap:10px}
.lesson-item{
  display:flex;align-items:center;gap:14px;width:100%;text-align:left;
  background:var(--card);border:2px solid var(--line);border-radius:14px;
  padding:14px 16px;min-height:68px;font-size:18px;color:var(--ink);cursor:pointer;
}
.lesson-item:active{background:var(--accent-soft)}
.lesson-item.current{border-color:var(--accent);background:#F6F8F6}
.lesson-item .num{
  flex:0 0 40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:17px;background:#EEF1EF;color:var(--ink);
}
.lesson-item.done .num{background:var(--ok);color:#fff}
.lesson-item .t{flex:1;font-weight:700;line-height:1.5}
.lesson-item .d{display:block;font-size:16px;font-weight:600;color:var(--ink-2)}

.loading{font-size:18px;color:var(--ink-2);padding:30px 0}
.congrats{display:none;margin-top:14px;padding:14px 16px;border-radius:12px;background:var(--ok-soft);color:var(--ok);font-weight:800}
.congrats.show{display:block}

footer{text-align:center;font-size:16px;color:var(--ink-2);padding:10px 0 40px}

/* 第一頁三格大掣：AI 課／流量變現課／AI 持續更新課 */
.track-tiles{display:flex;flex-direction:column;gap:14px;margin-bottom:28px}
.track-tile{
  display:flex;align-items:center;gap:16px;padding:20px 18px;min-height:96px;border-radius:18px;
  background:var(--card);border:2px solid var(--accent);color:var(--ink);text-decoration:none;
}
.track-tile:active{background:var(--accent-soft)}
.track-tile.locked{border-color:#B7C2BC;background:#EEF1EF}
.track-tile .icon{font-size:36px;line-height:1}
.track-tile .txt{display:flex;flex-direction:column;gap:2px}
.track-tile .name{font-size:22px;font-weight:800}
.track-tile .meta{font-size:16px;font-weight:700;color:var(--ink-2)}
.back-link{display:inline-block;font-size:17px;padding:10px 0;margin-bottom:10px;text-decoration:none}
.track-head{margin-bottom:14px}
.track-head h2{font-size:26px;font-weight:800;margin-bottom:4px}
.track-head .sub{font-size:17px;color:var(--ink-2)}
.path-card h3,.course-card h3{font-size:21px;font-weight:800;margin-bottom:4px}
.course-card.locked{background:#EEF1EF}
.plan-tag{display:inline-block;font-size:15px;font-weight:800;color:var(--accent-deep);background:var(--accent-soft);padding:3px 12px;border-radius:99px;margin-bottom:10px}
.lock-note{font-size:17px;font-weight:700;color:var(--ink);margin-bottom:14px}

/* 申請帳戶／開通學員 */
.show-pw{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;margin-top:14px}
.show-pw input{width:24px;height:24px;min-height:0}
.done-text{font-size:18px;line-height:1.7;margin-bottom:10px}
.signup-cta{margin-top:18px}
.admin-card h3{font-size:22px;font-weight:800;margin-bottom:6px}
.admin-info{white-space:pre-line;font-size:17px;line-height:1.7;margin-bottom:8px}
.admin-wa{display:inline-block;font-size:17px;margin-bottom:12px}
.admin-label{font-size:17px;font-weight:800;margin-bottom:8px}
.admin-courses{display:flex;flex-direction:column;gap:8px;margin-bottom:14px}
.admin-course{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;padding:10px 12px;border:1.5px solid var(--line);border-radius:12px;background:#fff}
.admin-course input{width:24px;height:24px;min-height:0;flex:0 0 24px}

/* 🎓 課室：課程封面卡（似 Skool Classroom）—— 手機一行一張，平板兩張，電腦三張 */
.wrap-wide{max-width:1080px}
.course-grid{display:grid;grid-template-columns:1fr;gap:18px}
@media (min-width:640px){ .course-grid{grid-template-columns:1fr 1fr} }
@media (min-width:980px){ .course-grid{grid-template-columns:1fr 1fr 1fr} }
.course-tile{
  display:flex;flex-direction:column;background:var(--card);border:1.5px solid var(--line);border-radius:18px;
  overflow:hidden;color:var(--ink);text-decoration:none;box-shadow:0 2px 10px rgba(22,20,18,.06);
}
.course-tile:active{transform:scale(.99)}
.course-tile.locked{background:#EEF1EF}
.cover{position:relative;aspect-ratio:16/9;display:flex;flex-direction:column;justify-content:flex-end;padding:16px 18px;color:#fff;overflow:hidden}
.cover-img{background-size:cover;background-position:center}
.course-tile.locked .cover{filter:saturate(.35) brightness(.85)}
.cover-tag{position:absolute;top:14px;left:16px;font-size:15px;font-weight:800;background:rgba(255,255,255,.95);color:#161412;padding:4px 12px;border-radius:99px}
.cover-icon{font-size:34px;line-height:1;margin-bottom:8px}
.cover-title{font-size:26px;font-weight:900;line-height:1.25;max-width:68%;text-shadow:0 2px 8px rgba(0,0,0,.25)}
.cover-face{position:absolute;right:14px;bottom:12px;width:30%;max-width:118px;aspect-ratio:1;border-radius:50%;object-fit:cover;transform:scale(1);border:3px solid rgba(255,255,255,.9);box-shadow:0 4px 14px rgba(0,0,0,.25)}
.cover-lock{position:absolute;top:12px;right:14px;font-size:24px;background:rgba(0,0,0,.45);border-radius:50%;width:42px;height:42px;display:flex;align-items:center;justify-content:center}
.tile-body{padding:16px 18px 18px;display:flex;flex-direction:column;flex:1}
.tile-body h3{font-size:20px;font-weight:800;line-height:1.4;margin-bottom:4px}
.tile-body .sub{font-size:16px;color:var(--ink-2);line-height:1.6;margin-bottom:12px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.tile-body .progress{margin-top:auto}
.tile-body .progress-text{margin-bottom:8px}
.tile-body .lock-note{margin-top:auto;margin-bottom:8px;font-size:16px}
.tile-go{font-size:17px;font-weight:800;color:var(--accent-deep)}
.track-head h2{font-size:24px}
.course-grid + .track, section.track + section.track{margin-top:40px}

/* 📅 下一個活動（我的課程頂部） */
.next-event{
  display:grid;grid-template-columns:1fr auto;align-items:center;column-gap:12px;row-gap:2px;padding:14px 18px;margin-bottom:24px;border-radius:16px;
  background:var(--card);border:2px solid var(--accent);color:var(--ink);text-decoration:none;
}
.next-event .ne-label{grid-column:1}
.next-event .ne-text{grid-column:1;grid-row:2}
.next-event .ne-go{grid-column:2;grid-row:1 / span 2}
.next-event:active{background:var(--accent-soft)}
.ne-label{font-weight:800;font-size:17px;color:var(--accent-deep)}
.ne-text{font-weight:700;font-size:17px;line-height:1.5}
.ne-go{font-weight:800;font-size:20px;color:var(--accent-deep)}

/* 📅 活動日曆頁 */
.month-title{font-size:20px;font-weight:800;margin:26px 0 12px}
.event-card{display:flex;gap:16px;background:var(--card);border:1.5px solid var(--line);border-radius:16px;padding:16px;margin-bottom:14px}
.event-date{flex:0 0 66px;text-align:center;border-radius:12px;background:var(--accent-soft);padding:8px 4px;align-self:flex-start}
.event-date .d{display:block;font-size:30px;font-weight:900;line-height:1.1;color:var(--accent-deep)}
.event-date .w{display:block;font-size:15px;font-weight:800;color:var(--ink)}
.event-info{flex:1;min-width:0}
.event-info h3{font-size:19px;font-weight:800;line-height:1.4;margin-bottom:4px}
.event-meta{font-size:16px;font-weight:600;color:var(--ink-2);line-height:1.6;white-space:pre-line;word-break:break-word}
.event-btns{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.event-btns a{font-size:16px;font-weight:800;padding:10px 14px;border-radius:12px;border:1.5px solid var(--accent);color:var(--accent-deep);text-decoration:none;background:#fff}
.event-btns a.primary{background:var(--accent);color:#fff}
.admin-events .event-card{align-items:flex-start}
/* 🔒 未報一點通：照見到但淺色、冇連結（字照用正常深色，唔用灰字） */
.event-card.locked{background:#F7F5EF;border-style:dashed;border-color:var(--gold,#C79D50)}
.event-card.locked .event-date{background:#EFE9DC}
.lock-tag{display:inline-block;font-size:14px;font-weight:800;color:var(--accent-deep);background:#fff;border:1px solid var(--gold,#C79D50);border-radius:999px;padding:2px 10px;margin-bottom:6px}
/* 📅 月曆格仔 */
.cal{background:#fff;border:1px solid var(--line);border-radius:16px;padding:14px;margin:18px 0 8px}
.cal-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}
.cal-head h2{font-size:20px;font-weight:800}
.cal-nav{width:44px;height:44px;border-radius:12px;border:1.5px solid var(--accent);background:#fff;color:var(--accent);font-size:20px;font-weight:800;cursor:pointer}
.cal-nav:disabled{opacity:.3;cursor:default}
.cal-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:4px}
.cal-wd{text-align:center;font-size:14px;font-weight:800;color:var(--ink-2);padding:4px 0}
.cal-day{min-height:64px;border-radius:10px;padding:4px;font-size:15px;font-weight:700;color:var(--ink);background:#fff;border:1px solid transparent;text-align:left;font-family:inherit;display:flex;flex-direction:column;gap:3px;min-width:0}
.cal-day.blank{visibility:hidden}
.cal-day.past{color:#A3ABA6}
.cal-day.today{border-color:var(--accent)}
.cal-day.has{background:var(--gold-soft,#F8F1E3);border-color:var(--gold,#C79D50);cursor:pointer}
.cal-day .n{font-size:15px;font-weight:800}
.cal-tag{display:block;font-size:12px;font-weight:800;line-height:1.3;background:var(--accent);color:#fff;border-radius:6px;padding:2px 4px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.cal-tag.locked{background:#EFE9DC;color:var(--accent-deep);border:1px dashed var(--gold,#C79D50)}
.cal-note{font-size:14px;font-weight:600;color:var(--ink-2);margin-top:10px}
.event-card.flash{outline:3px solid var(--gold,#C79D50);outline-offset:2px}
.cal-list{list-style:none;margin:12px 0 0;padding:0;display:flex;flex-direction:column;gap:6px}
.cal-list button{width:100%;text-align:left;font-family:inherit;font-size:16px;font-weight:700;color:var(--ink);background:#fff;border:1px solid var(--line);border-left:4px solid var(--gold,#C79D50);border-radius:10px;padding:10px 12px;cursor:pointer;line-height:1.4}
.cal-list b{color:var(--accent);margin-right:8px}
@media (max-width:480px){.cal{padding:10px}.cal-grid{gap:3px}.cal-day{min-height:48px;padding:3px;align-items:center}
  .cal-tag{font-size:0;width:8px;height:8px;padding:0;border-radius:50%;margin-top:2px}}
.admin-form-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:0 12px}
.admin-form-grid input{width:100%;min-width:0;padding-left:10px;padding-right:10px}

/* 🎬 課堂頁（似 Skool，左右調轉）：左＝今課內容，右＝課程進度＋課堂清單；手機上下排 */
.course-layout{display:flex;flex-direction:column;gap:20px}
.lesson-main,.lesson-side{background:var(--card);border:1.5px solid var(--line);border-radius:18px;padding:20px 18px}
.lesson-head{display:flex;align-items:flex-start;gap:12px;margin-bottom:14px}
.lesson-head-t{flex:1;min-width:0}
.lesson-title{font-size:24px;font-weight:800;line-height:1.4;margin:0}
.done-check{flex:0 0 46px;width:46px;height:46px;border-radius:50%;border:2.5px solid #B7C2BC;background:#fff;color:#B7C2BC;font-size:22px;font-weight:900;cursor:pointer;display:flex;align-items:center;justify-content:center}
.done-check.on{background:var(--ok);border-color:var(--ok);color:#fff}
.lesson-main .player{margin-bottom:16px}
.resources{margin:18px 0 6px;padding-top:16px;border-top:1.5px solid var(--line)}
.resources-title{font-size:18px;font-weight:800;margin-bottom:10px}
.side-title{font-size:20px;font-weight:800;line-height:1.45;margin-bottom:12px}
.side-progress{height:14px}
.side-list .lesson-item{min-height:60px;padding:12px 14px;font-size:17px}
.side-list .lesson-item.current{background:#FFF1D6;border-color:#E8A93B}
@media (min-width:980px){
  .course-layout{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:24px;align-items:start}
  .lesson-main{padding:26px 28px}
  .lesson-side{position:sticky;top:80px;max-height:calc(100vh - 100px);overflow:auto}
}

/* 📜 學員使用條款：申請頁剔選＋舊學員同意彈窗 */
.agree-row{display:flex;align-items:flex-start;gap:12px;font-size:17px;font-weight:700;line-height:1.6;margin-top:18px}
.agree-row input{flex:0 0 26px;width:26px;height:26px;min-height:0;margin-top:2px}
.terms-gate{position:fixed;inset:0;z-index:50;background:rgba(22,20,18,.6);display:flex;align-items:center;justify-content:center;padding:16px}
.terms-box{background:var(--card);border-radius:20px;padding:24px 20px;max-width:520px;width:100%;max-height:calc(100vh - 32px);overflow:auto}
.terms-box h2{font-size:22px;font-weight:800;margin-bottom:12px}
.terms-box ul{padding-left:1.3em;margin-bottom:12px}
.terms-box li{font-size:17px;line-height:1.7;margin-bottom:6px}
.terms-box p{font-size:17px;margin-bottom:6px}
.terms-box .btn{margin-top:18px}
.terms-box .btn[disabled]{opacity:.5}

/* 📖 圖文教學課（courses.json lesson.noVideo）：唔出黑色播放框，出大掣打開教學頁 */
.player.is-doc{aspect-ratio:auto;background:linear-gradient(135deg,#F2845F,#C2401F);color:#fff}
.doc-open{display:flex;flex-direction:column;align-items:center;text-align:center;gap:6px;padding:34px 20px}
.doc-open .doc-icon{font-size:44px;line-height:1.1}
.doc-open b{font-size:22px;font-weight:700}
.doc-open .doc-sub{font-size:17px;font-weight:600;margin-bottom:10px}
.doc-open .btn{background:#fff;color:#0F3D2E;min-width:220px;text-decoration:none;font-size:18px}

/* 🗓️ 練習任務課（courses.json lesson 有 points／goal／steps／prompts／doneWhen，例如 course-9 課後 7 日練習）
   冇播放框；指令框一撳「複製指令」，貼去 Claude Code。字最細 16px、全部深色字 */
.task{display:flex;flex-direction:column;gap:12px;margin-bottom:18px}
.task-label{display:block;font-size:18px;font-weight:800;color:var(--ink);margin-top:6px}
.task p{font-size:18px;line-height:1.7;color:var(--ink)}
.task-points{display:flex;flex-direction:column;gap:12px}
.task-point{background:#F6F8F6;border:1.5px solid rgba(15,61,46,.35);border-left:6px solid var(--accent);border-radius:16px;padding:14px 16px}
.task-point b{display:block;font-size:19px;font-weight:800;line-height:1.5;color:var(--accent-deep);margin-bottom:4px}
.task-point p{white-space:pre-line;font-size:17px;line-height:1.7;margin:0}
.task-goal,.task-done{border-radius:16px;padding:14px 16px}
.task-goal{background:#F6F8F6;border:1.5px solid rgba(15,61,46,.35)}
.task-done{background:var(--ok-soft);border:1.5px solid rgba(138,109,18,.35)}
.task-goal .task-label,.task-done .task-label{margin-top:0;margin-bottom:2px}
.task-done .task-label{color:var(--ok)}
.task-steps{padding-left:1.4em;display:flex;flex-direction:column;gap:6px}
.task-steps li{font-size:18px;line-height:1.7;padding-left:4px;white-space:pre-line}
.prompt-card{background:#fff;border:2px dashed #B7C2BC;border-radius:16px;padding:14px;display:flex;flex-direction:column;gap:10px}
.prompt-label{font-size:18px;font-weight:800;color:var(--ink)}
.prompt-text{font-family:inherit;font-size:17px;font-weight:500;line-height:1.7;color:var(--ink);white-space:pre-wrap;word-break:break-word;background:#FFFDF9;border-radius:10px;padding:12px;margin:0}
.prompt-card .btn-copy{min-height:52px;font-size:18px;border:2px solid var(--accent);color:var(--accent-deep)}
.prompt-card .btn-copy.copied{background:var(--ok-soft);color:var(--ok);border-color:var(--ok)}

/* 任務卡示意圖（courses.json lesson.shots） */
.task-shot{margin:12px 0 6px}
.task-shot img{display:block;width:100%;height:auto;border-radius:14px;border:1px solid var(--line,#E4E8E5);box-shadow:0 6px 18px rgba(22,20,18,.08)}
.task-shot figcaption{font-size:15px;font-weight:600;margin-top:6px;color:inherit}
.task-shot-btn{display:inline-block;margin-top:8px;padding:10px 18px;border-radius:12px;background:#D2492A;color:#fff;font-weight:800;font-size:16px;text-decoration:none}

/* 分班定時開放：未到時間的課堂 */
.lock-card{background:#F6F8F6;border:1.5px dashed rgba(15,61,46,.45);border-radius:18px;padding:26px 20px;text-align:center}
.lock-card .lock-icon{display:block;font-size:40px;line-height:1;margin-bottom:10px}
.lock-card b{display:block;font-size:21px;margin-bottom:6px}
.lock-card p{font-size:16px;margin:0}

/* 課堂尾「進階班會教」提示（courses.json lesson.upsell） */
.task-upsell{margin-top:16px;border-radius:16px;padding:16px;background:linear-gradient(135deg,#2B1D14,#4A2A1A);color:#FFF7EC}
.task-upsell .task-label{color:#FFD9C9;margin:0 0 6px;font-size:18px}
.task-upsell p{font-size:16px;line-height:1.7;margin:0;color:#FFF7EC}
.task-upsell-btn{display:inline-block;margin-top:12px;padding:10px 18px;border-radius:12px;background:#FFD9C9;color:#2B1D14;font-weight:800;font-size:16px;text-decoration:none}

/* 一課多條片：播放框下面嘅揀片清單（courses.json lesson.chapters） */
.chapters{margin:0 0 18px;display:flex;flex-direction:column;gap:10px}
.chapters-title{font-size:19px;font-weight:800;margin:4px 0 2px}
.chapter{display:flex;align-items:center;gap:14px;width:100%;min-height:60px;padding:12px 16px;border:2px solid var(--line);border-radius:14px;background:#fff;color:var(--ink);font:inherit;text-align:left;cursor:pointer}
.chapter-n{flex:none;width:36px;height:36px;border-radius:50%;background:var(--accent-soft);color:var(--accent);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:17px}
.chapter-t{font-size:17px;font-weight:700;line-height:1.4}
.chapter-len{display:block;font-size:15px;font-weight:600;color:var(--ink-2)}
.chapter.current{border-color:var(--accent);background:var(--accent-soft)}
.chapter.current .chapter-n{background:var(--accent);color:#fff}
.chapter.current .chapter-n::before{content:'▶';font-size:14px}
.chapter.current .chapter-n{font-size:0}