/* public/css/live.css — 扫码入课（二维码、全屏投屏）、实时看板、手机遥控、Telegram 登录与小程序适配、语言切换、学习心得与访客页（在 app.css 之后加载） */
.qr-svg,.qr-mini svg,.proj-qr svg{display:block;width:100%;height:auto;background:#fff;border-radius:8px}
.qr-mini{width:132px;padding:6px;background:#fff;border:1px solid var(--line);border-radius:12px;margin:10px auto}
.qr-mini.lg{width:200px}
.qr-mini small{display:block;text-align:center;color:#555;font-size:12px;margin-top:4px}
.join-qr{width:150px;flex:none;margin:0}
.poll-teach{display:flex;gap:18px;align-items:flex-start}.poll-teach .grow{flex:1;min-width:0}
.join-box{margin-top:14px}.invite-qr{width:110px;margin:0 0 0 12px}
.qr-card{text-align:center;max-width:170px}.qr-card .link-btn{font-size:12px;word-break:break-all}
.break{word-break:break-all}
/* 全屏投屏 */
.projector{position:fixed;inset:0;z-index:2000;background:var(--bg);display:flex;flex-direction:column;justify-content:center;padding:4vh 5vw;gap:3vh}
.proj-x{position:absolute;top:16px;right:16px}
.proj-main{display:flex;align-items:center;justify-content:center;gap:5vw}
.proj-qr{width:min(42vw,62vh);padding:2vh;background:#fff;border-radius:24px;box-shadow:var(--shadow);flex:none}
.proj-info h1{font-size:clamp(28px,4vw,60px);margin:.1em 0 .3em}
.proj-steps{font-size:clamp(16px,1.7vw,26px);line-height:1.7;padding-left:1.2em;margin:0 0 2vh}
.proj-code{font-size:clamp(18px,2vw,30px)}.proj-code b{font-size:1.9em;letter-spacing:.12em;color:var(--blue);margin-left:.3em}
.proj-link{color:var(--muted);font-size:clamp(13px,1.2vw,18px)}
.proj-online{font-size:clamp(16px,1.6vw,24px);text-align:center}.proj-online b{font-size:1.6em;color:var(--green)}
.proj-names{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-top:10px;max-height:16vh;overflow:hidden}
.proj-names span{background:var(--blue2);color:var(--blue);border-radius:999px;padding:3px 12px;font-size:clamp(13px,1.1vw,18px);animation:pop .4s ease}
@keyframes pop{from{transform:scale(.6);opacity:0}to{transform:none;opacity:1}}
@media(max-width:820px){.proj-main{flex-direction:column;gap:3vh}.proj-qr{width:min(80vw,46vh)}.poll-teach{flex-direction:column}}
/* 实时看板 */
.board{margin:0 0 14px;border-left:4px solid var(--green)}
.board-head{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-bottom:8px}
/* 手机遥控 */
.remote{max-width:560px;margin:0 auto;padding:12px 12px 40px;display:flex;flex-direction:column;gap:12px}
.rm-head{display:flex;justify-content:space-between;align-items:center;gap:10px}
.rm-title{font-size:20px;margin:6px 0 12px}
.rm-nav{display:grid;grid-template-columns:1fr 1fr;gap:10px}.rm-nav .action-btn{min-height:64px;font-size:18px;justify-content:center}
.remote .card{padding:14px}.remote .row{margin-top:8px}.remote select{max-width:100%}
.rm-pick{margin-top:6px;font-size:18px}
/* Telegram 登录、绑定、小程序 */
.tg-btn{background:#2aabee;border-color:#2aabee;color:#fff}.tg-btn:hover{background:#229ed9}
.tg-box{text-align:center}.tg-wait{color:var(--muted)}
.or{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:13px;margin:14px 0}.or::before,.or::after{content:"";flex:1;border-top:1px solid var(--line)}
.pw-login{margin:12px 0}.pw-login summary{cursor:pointer;color:var(--muted);font-size:14px}
.in-tg .app-foot{display:none}
.in-tg .topbar{position:sticky;top:0}
.remote-tg .app-top{display:none}
.tg-promo{display:flex;gap:24px;align-items:center;justify-content:space-between}.tg-promo .qr-mini{margin:0}
@media(max-width:640px){.tg-promo{flex-direction:column}}
/* 语言切换 */
.lang-sel{flex:none;border:1px solid var(--line);background:var(--raised);border-radius:8px;padding:4px 6px;font-size:13px;max-width:110px}
.live-lang{display:inline-flex;border:1px solid var(--line);border-radius:999px;overflow:hidden;margin-left:auto}
.live-lang button{border:0;background:transparent;padding:4px 10px;font-size:12px;cursor:pointer;color:var(--muted)}
.live-lang button.on{background:var(--blue);color:#fff}
.lang-pick .action-btn{min-width:110px}
/* 学习心得、访客 */
.note-item{margin:10px 0}.note-item.summary{border-left:4px solid var(--blue);background:var(--blue2)}
.note-item .md p{margin:.2em 0}
[data-lang=uz] .main,[data-lang=ru] .main,[data-lang=en] .main{overflow-wrap:anywhere}