:root{
  --bg:#f5f7fb; --card:#fff; --ink:#1f2a44; --sub:#7a869a;
  --primary:#3b6cff; --primary-d:#2a55d6; --ok:#1fb56b; --warn:#f0a020;
  --line:#e6eaf2; --shadow:0 6px 24px rgba(31,42,68,.08);
}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,"PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  background:var(--bg);color:var(--ink);-webkit-text-size-adjust:100%}
.hidden{display:none!important}
button{cursor:pointer;font:inherit}
input,select,textarea{font:inherit;padding:10px 12px;border:1px solid var(--line);border-radius:10px;
  background:#fff;color:var(--ink);outline:none;width:100%}
input:focus,select:focus{border-color:var(--primary)}
button.primary,button#loginBtn{background:var(--primary);color:#fff;border:none;border-radius:10px;
  padding:11px 16px;font-weight:600;transition:.15s}
button.primary:hover,button#loginBtn:hover{background:var(--primary-d)}
button.ghost{background:transparent;border:1px solid var(--line);border-radius:9px;padding:7px 12px;color:var(--sub)}
button.danger{background:#e23;border:none;border-radius:10px;padding:9px 14px;font-weight:600;color:#fff}
button.danger:hover{background:#c81414}
.tag{font-size:12px;background:#eef3ff;color:var(--primary);border-radius:20px;padding:2px 10px;margin-left:6px}

/* 登录 */
.login-wrap{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:20px}
.login-card{background:var(--card);border-radius:18px;box-shadow:var(--shadow);padding:32px 28px;width:100%;max-width:360px}
.login-card h1{font-size:20px;margin:0 0 4px}
.login-card .sub{color:var(--sub);font-size:13px;margin:0 0 20px}
.login-card input{margin-bottom:12px}
.login-card button{width:100%;margin-top:4px}
.login-card .hint{color:var(--sub);font-size:12px;margin-top:16px;line-height:1.6}
.msg{font-size:13px;min-height:18px;margin-top:8px;color:#e23}
.msg.ok{color:var(--ok)}

/* 主界面 */
.topbar{display:flex;justify-content:space-between;align-items:center;padding:12px 18px;
  background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}
.topbar .brand{font-weight:700}
.topbar .user{display:flex;align-items:center;gap:8px}
.nav{display:flex;gap:8px;padding:12px 18px;overflow-x:auto;background:var(--card);border-bottom:1px solid var(--line)}
.nav button{white-space:nowrap;background:#f0f3fa;border:none;border-radius:20px;padding:8px 16px;color:var(--sub);font-weight:600}
.nav button.active{background:var(--primary);color:#fff}
.view{padding:18px;max-width:1100px;margin:0 auto}

.card{background:var(--card);border-radius:14px;box-shadow:var(--shadow);padding:18px;margin-bottom:16px}
.card h3{margin:0 0 14px;font-size:16px}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:end}
.row>*{flex:1;min-width:160px}
label{font-size:12px;color:var(--sub);display:block;margin-bottom:5px}

/* 看板表格 */
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{padding:10px 8px;text-align:left;border-bottom:1px solid var(--line)}
th{color:var(--sub);font-weight:600;font-size:12px}
td .mini{font-size:12px;color:var(--sub)}
.pill{display:inline-block;background:#eef3ff;color:var(--primary);border-radius:8px;padding:2px 8px;font-size:12px;margin:2px 4px 2px 0}

/* 列表项 */
.item{display:flex;justify-content:space-between;align-items:center;padding:12px;border:1px solid var(--line);
  border-radius:12px;margin-bottom:10px;gap:12px;flex-wrap:wrap}
.item .meta{font-size:13px;color:var(--sub)}
.item .acts{display:flex;gap:8px}
audio{width:100%;max-width:320px}
a.dl{color:var(--primary);text-decoration:none;font-size:13px}

/* 练琴打卡 */
.timer{font-size:34px;font-weight:700;font-variant-numeric:tabular-nums;margin:8px 0}
.mode-switch{display:flex;gap:18px;flex-wrap:wrap;margin:10px 0 4px}
.mode-switch label{display:inline-flex;align-items:center;gap:6px;font-size:14px;color:var(--ink);cursor:pointer}
.mode-switch input{width:auto;accent-color:var(--primary)}
.preview{width:100%;max-width:360px;border-radius:12px;margin:10px 0;background:#000;display:block}
video{max-width:320px;width:100%;border-radius:10px}
.rec-dot{display:inline-block;width:10px;height:10px;border-radius:50%;background:#e23;margin-right:8px;
  animation:blink 1s infinite}
@keyframes blink{50%{opacity:.2}}
.stat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:12px;margin-top:8px}
.stat{background:#f7f9ff;border-radius:12px;padding:14px}
.stat .n{font-size:22px;font-weight:700;color:var(--primary)}
.stat .l{font-size:12px;color:var(--sub)}
.stat.hl{background:#eafaf0;border:1px solid #b8e6c8}
.stat.hl .n{color:#1a9e54}
.eff{color:#1a9e54;font-weight:700}
.hidden{display:none !important}
.progress{height:10px;background:#eef1f6;border-radius:8px;overflow:hidden;margin-top:12px}
.progress .bar{height:100%;width:0;background:linear-gradient(90deg,var(--primary),#6f9bff);transition:width .2s ease}
.upinfo{margin-top:6px;font-size:13px;color:var(--sub)}
@media(max-width:560px){.row>*{min-width:100%}.view{padding:12px}}

/* 转写状态与文字 */
.pill.ok{background:#e8f7ee;color:#1a9e54}
.pill.err{background:#fdecec;color:#d33}
.transcript{margin-top:8px;padding:10px 12px;background:#fafbff;border-left:3px solid var(--primary);
  border-radius:6px;font-size:14px;line-height:1.7;white-space:pre-wrap;color:#223}

/* 转写提炼：老师要求/强调 置顶 */
.sum{margin-top:8px;padding:10px 12px;background:#fff7ec;border-left:3px solid var(--warn);
  border-radius:6px}
.sum-h{font-size:12px;font-weight:700;color:#b9770f;margin-bottom:6px}
.sum-list{margin:0;padding-left:18px}
.sum-list li{font-size:14px;line-height:1.7;color:#3a2a12}
.sum-ov{font-size:14px;line-height:1.7;color:#3a2a12}
.sum-raw{margin-top:8px}
.sum-raw summary{cursor:pointer;font-size:13px;color:var(--primary)}
.sum-raw .transcript{margin-top:6px}
/* 提炼总结：本次课的问题 / 要解决的重点问题 */
.sum.prob{background:#fdf2f2;border-left-color:#d9534f}
.sum.prob .sum-h{color:#c0392b}
.sum.prob .sum-list li{color:#7a2020}
.sum.foc{background:#fdf8ec;border-left-color:#e0a92e}
.sum.foc .sum-h{color:#a4760a}
.sum.foc .sum-list li{color:#5c4a16}
/* 列表内通用提示条（内容类型标注 / 转写失败 / 未识别内容） */
.hint.err{margin-top:6px;padding:8px 10px;background:#fdecec;color:#c0392b;border-radius:8px;font-size:13px;line-height:1.6}
.hint.warn{margin-top:6px;padding:8px 10px;background:#fff7ec;color:#8a5a00;border-radius:8px;font-size:13px;line-height:1.6}
.dlrow{margin-top:6px}
.dlrow a.dl{color:var(--primary);text-decoration:none;font-size:13px;padding:2px 0;display:inline-block}

/* 练琴打卡操作按钮 */
.pr-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:10px}
.pr-actions button{margin:0}

/* 摄像头控制：翻转 / 缩放 */
.cam-ctl{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin:10px 0 4px}
.zoom-wrap{display:flex;align-items:center;gap:8px}
.zoom-wrap .zoom-ico{font-size:13px;color:var(--sub);white-space:nowrap}
.zoom-wrap input[type=range]{width:160px;padding:0;border:none}
.zoom-val{font-size:13px;color:var(--ink);min-width:34px;text-align:right;font-variant-numeric:tabular-nums}

/* 列表内媒体预览 / 播放 */
.thumb{max-width:220px;border-radius:8px;display:block;margin-top:6px;border:1px solid var(--line);cursor:zoom-in}
.item video,.item audio{margin-top:6px}

/* 摄像头控制：翻转 / 缩放 */
.cam-ctl{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin:10px 0 4px}
.zoom-wrap{display:flex;align-items:center;gap:8px}
.zoom-wrap .zoom-ico{font-size:13px;color:var(--sub);white-space:nowrap}
.zoom-wrap input[type=range]{width:170px;padding:0;border:none}
.zoom-val{font-size:13px;color:var(--ink);min-width:34px;text-align:right;font-variant-numeric:tabular-nums}

/* 拍照上传乐谱：全屏相机/编辑弹层 */
.cam-modal{position:fixed;inset:0;background:#0c1018;z-index:200;display:flex;flex-direction:column}
.cam-header{display:flex;align-items:center;gap:12px;padding:10px 14px;color:#fff;background:rgba(0,0,0,.35)}
.cam-title{font-weight:600;font-size:15px}
.cam-stage{position:relative;flex:1;display:flex;align-items:center;justify-content:center;overflow:hidden;background:#000;touch-action:none}
.cam-video{width:100%;height:100%;object-fit:contain;transform:scaleX(1)}
.cam-canvas{width:100%;height:100%;object-fit:contain;background:#fff}
.crop-box{position:absolute;border:2px solid #3b6cff;box-shadow:0 0 0 9999px rgba(0,0,0,.45);box-sizing:border-box;pointer-events:none}
.crop-box::before{content:"";position:absolute;left:50%;top:0;bottom:0;width:1px;background:rgba(59,108,255,.5)}
.crop-box::after{content:"";position:absolute;top:50%;left:0;right:0;height:1px;background:rgba(59,108,255,.5)}
.cam-tools{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;padding:12px;background:#11161f}
.cam-tools button{padding:10px 14px;font-size:14px}
.cam-sliders{display:flex;gap:14px;align-items:center;flex-wrap:wrap;justify-content:center;padding:10px 14px;background:#11161f;color:#cfd6e4}
.cam-slide{display:flex;align-items:center;gap:8px;font-size:13px}
.cam-slide input[type=range]{width:150px;padding:0;border:none}
.cam-slide span{min-width:42px;text-align:right;font-variant-numeric:tabular-nums}
.cam-modal .progress,.cam-modal .upinfo{margin:0 14px 6px}
.cam-modal .msg{padding:6px 14px 12px;color:#cfd6e4;font-size:13px}
.cam-modal .msg.ok{color:#7ee2b0}


/* 专业选择 + 乐器声识别计时 + 今日累计 + 每日归并 */
.major-set{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:4px}
.major-set label{display:flex;align-items:center;gap:6px;font-size:14px;cursor:pointer}
.major-set input[type=radio]{width:16px;height:16px}
.major-two{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:4px}
.major-two select{flex:1;min-width:150px;padding:9px 10px;border:1px solid #c8d2e2;border-radius:8px;font-size:14px;background:#fff;color:#223}
.major-two select:focus{outline:none;border-color:var(--primary)}
.inst-pick{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin:10px 0 4px}
.inst-pick .inst-label{font-size:14px;font-weight:600;color:var(--ink)}
.inst-pick select{flex:1;min-width:220px;max-width:420px;padding:9px 10px;border:1px solid #c8d2e2;border-radius:8px;font-size:14px;background:#fff;color:#223}
.inst-pick select:focus{outline:none;border-color:var(--primary)}
.inst-pick select:disabled{background:#f2f4f8;color:#8a93a3;cursor:not-allowed}
/* 首次进入配置向导弹窗 */
.modal-wrap{position:fixed;inset:0;background:rgba(12,16,24,.55);z-index:300;display:flex;align-items:center;justify-content:center;padding:18px}
.modal-wrap .modal-card{background:#fff;border-radius:14px;max-width:440px;width:100%;padding:20px 18px;box-shadow:0 18px 50px rgba(0,0,0,.3);max-height:86vh;overflow:auto}
.modal-wrap .modal-card h3{margin:0 0 6px}
.modal-wrap .major-two{margin-top:10px}
/* 注册表单 */
.reg-card{max-width:460px}
.reg-form{display:flex;flex-direction:column;gap:10px;margin:12px 0}
.reg-form input,.reg-form select{width:100%}
.reg-row{display:flex;gap:10px}
.reg-row>*{flex:1;min-width:0}
.login-card .hint a{color:var(--primary);text-decoration:none;font-weight:600}
/* 练琴统计 */
.mini-tbl{width:100%;border-collapse:collapse;font-size:13.5px;margin:8px 0}
.mini-tbl th,.mini-tbl td{padding:7px 8px;border-bottom:1px solid var(--line);text-align:left;white-space:nowrap}
.mini-tbl th{background:#f4f6fb;color:var(--sub);font-weight:600}
.mini-tbl td.eff,.eff{color:#0a8a4a;font-weight:600}
.wk-details{margin:10px 0}
.wk-details summary{cursor:pointer;font-weight:600;color:var(--ink);padding:6px 0}
.sort-bar{display:flex;align-items:center;gap:14px;flex-wrap:wrap;font-size:14px;margin:14px 0 8px;font-weight:600}
.sort-bar label{display:inline-flex;align-items:center;gap:5px;font-weight:400;cursor:pointer}
.sort-bar input{width:auto;accent-color:var(--primary)}
.day-block{border:1px solid var(--line);border-radius:10px;padding:10px 12px;margin:10px 0;background:#fbfcfe}
.day-head{display:flex;align-items:center;gap:12px;flex-wrap:wrap;font-size:14px;margin-bottom:4px}
.day-head .pill{background:#e8f0ff;color:#2b5dc7}
.chk{display:inline-flex;align-items:center;gap:6px;font-size:14px;padding:10px 0}
.chk input{width:auto;accent-color:var(--primary)}
.today-line{background:linear-gradient(135deg,#f0f4ff,#f7fbf7);border:1px solid #dde6f5;border-radius:10px;padding:8px 12px;font-size:13.5px;margin:8px 0}
.timer-wrap{display:flex;flex-direction:column;align-items:center;gap:2px;margin:6px 0}
.timer-sub{font-size:14px;color:#5a6474}
.timer-sub .eff-t{font-weight:700;color:#0a8a4a;font-variant-numeric:tabular-nums}
.det{min-height:22px;font-size:13.5px;text-align:center}
.det-on{color:#0a8a4a;font-weight:600}
.det-half{color:#3a6fd8;font-weight:600}
.det-wait{color:#98650c}
.daily-item{background:#f6f8fc;border:1px dashed #b9c6de}