:root{
  --bg:#f5f3ee; --card:#fff; --ink:#1c1b19; --muted:#6b675f; --line:#e4e0d6; --soft:#efece4;
  --red:#c8321e; --red-bg:#fdeeeb; --orange:#d2600f; --orange-bg:#fff1e4;
  --amber:#a86d00; --amber-bg:#fff7e1; --blue:#2f5fa7; --blue-bg:#eaf1fb; --green:#2e7d4f; --green-bg:#e8f4ec;
  --radius:12px;
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.45 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
button,input,select,textarea{font:inherit;color:inherit}
.wrap{max-width:920px;margin:0 auto;padding:16px 14px 110px}
header{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.brand{font-family:"Iowan Old Style","Palatino Linotype",Palatino,Georgia,serif;font-weight:700;font-size:26px;letter-spacing:-.5px;margin:0}
.brand span{color:var(--red)}
.sync{font-size:12px;color:var(--muted);display:flex;align-items:center;gap:6px;margin-left:auto}
.sync::before{content:"";width:8px;height:8px;border-radius:50%;background:#bbb}
.sync[data-kind=ok]::before{background:var(--green)}
.sync[data-kind=pending]::before{background:var(--amber)}
.sync[data-kind=warn]::before{background:var(--orange)}
.iconbtn{border:1px solid var(--line);background:var(--card);border-radius:10px;width:36px;height:36px;cursor:pointer;display:grid;place-items:center}
.tabs{display:flex;background:var(--soft);border-radius:12px;padding:4px;gap:4px;margin-bottom:18px}
.tabs button{flex:1;border:0;background:transparent;padding:9px 6px;border-radius:9px;cursor:pointer;font-weight:500;color:var(--muted)}
.tabs button.on{background:var(--card);color:var(--ink);box-shadow:0 1px 2px rgba(0,0,0,.08)}
h2{font-family:"Iowan Old Style","Palatino Linotype",Palatino,Georgia,serif;font-weight:600;font-size:20px;margin:22px 0 10px}
h3.group{font-size:12px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:22px 0 8px;display:flex;align-items:center;gap:8px}
h3.group .n{background:var(--soft);border-radius:20px;padding:0 8px;font-size:11px}
h3.group.overdue{color:var(--red)} h3.group.today{color:var(--orange)} h3.group.soon{color:var(--amber)}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.stat{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:10px 12px}
.stat b{display:block;font-family:"Iowan Old Style","Palatino Linotype",Palatino,Georgia,serif;font-size:26px;line-height:1.1}
.stat small{color:var(--muted);font-size:12px}
.stat.overdue b{color:var(--red)} .stat.today b{color:var(--orange)} .stat.soon b{color:var(--amber)}
.stat.zero b{color:#c9c4b8}
@media(max-width:520px){.stats{grid-template-columns:repeat(2,1fr)}}
.todaybar{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:10px 12px;margin-top:10px;font-size:14px}
.todaybar .lbl{color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.06em;margin-bottom:4px}
.todaybar .cls{display:flex;gap:8px;align-items:center;padding:2px 0}
.list{display:flex;flex-direction:column;gap:8px}
.item{display:flex;align-items:flex-start;gap:10px;background:var(--card);border:1px solid var(--line);border-left:5px solid var(--line);border-radius:var(--radius);padding:10px 12px}
.item.overdue{border-left-color:var(--red);background:var(--red-bg);border-color:#f3c9c1}
.item.today{border-left-color:var(--orange);background:var(--orange-bg);border-color:#f5d3b6}
.item.soon{border-left-color:#e0a420;background:var(--amber-bg);border-color:#f0e0b0}
.item.started{border-left-color:var(--blue)}
.item.done{opacity:.6}
.item.done .title{text-decoration:line-through}
.check{flex:none;width:24px;height:24px;border-radius:50%;border:2px solid #b9b3a6;background:#fff;cursor:pointer;margin-top:1px;display:grid;place-items:center;padding:0}
.check.on{background:var(--green);border-color:var(--green);color:#fff}
.main{flex:1;min-width:0;cursor:pointer}
.title{font-weight:600;overflow-wrap:anywhere}
.meta{font-size:13px;color:var(--muted);display:flex;flex-wrap:wrap;gap:4px 10px;margin-top:2px;align-items:center}
.dot{display:inline-block;width:9px;height:9px;border-radius:50%;background:var(--c);margin-right:5px;vertical-align:middle}
.tag{font-size:11px;font-weight:600;border-radius:20px;padding:1px 8px;background:var(--soft);color:var(--muted)}
.tag.started{background:var(--blue-bg);color:var(--blue)}
.due{text-align:right;flex:none;max-width:42%}
.due .rel{font-weight:600;font-size:13px}
.due .abs{font-size:12px;color:var(--muted)}
.item.overdue .rel{color:var(--red)} .item.today .rel{color:var(--orange)} .item.soon .rel{color:var(--amber)}
.empty{background:var(--card);border:1px dashed #cfc9bb;border-radius:var(--radius);padding:22px;text-align:center;color:var(--muted)}
.empty h2{margin-top:0;color:var(--ink)}
.btn{border:1px solid var(--line);background:var(--card);border-radius:10px;padding:8px 14px;cursor:pointer;font-weight:500}
.btn.primary{background:var(--ink);color:#fff;border-color:var(--ink)}
.btn.danger{color:var(--red);border-color:#efc2ba}
.btn.small{padding:5px 10px;font-size:13px}
.linkbtn{border:0;background:none;color:var(--blue);cursor:pointer;padding:4px 0;font-size:13px}
.chips{display:flex;gap:8px;overflow-x:auto;padding-bottom:4px;margin-bottom:12px}
.chip{flex:none;border:1px solid var(--line);background:var(--card);border-radius:20px;padding:6px 12px;cursor:pointer;display:flex;align-items:center;gap:4px;white-space:nowrap}
.chip.on{border-color:var(--ink);box-shadow:inset 0 0 0 1px var(--ink)}
.chip .cnt{font-size:11px;font-weight:600;color:#fff;background:var(--red);border-radius:10px;padding:0 6px;margin-left:4px}
.coursecard{background:var(--card);border:1px solid var(--line);border-top:6px solid var(--c);border-radius:var(--radius);padding:14px 16px}
.coursecard .top{display:flex;gap:10px;align-items:flex-start}
.coursecard h2{margin:0}
.coursecard .sub{color:var(--muted);font-size:14px}
.coursecard .meets{margin-top:8px;font-size:14px;display:flex;flex-direction:column;gap:2px}
.week{display:grid;grid-template-columns:repeat(var(--cols),1fr);gap:8px}
@media(max-width:700px){.week{grid-template-columns:1fr}}
.day{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:10px;min-height:80px}
.day.today{border-color:var(--ink);box-shadow:inset 0 0 0 1px var(--ink)}
.day .dh{font-weight:600;font-size:13px;display:flex;justify-content:space-between;margin-bottom:6px}
.day .dh small{color:var(--muted);font-weight:400}
.block{border-left:4px solid var(--c);background:color-mix(in srgb,var(--c) 9%,white);border-radius:6px;padding:5px 7px;margin-bottom:6px;font-size:13px;cursor:pointer}
.block b{display:block}
.block span{color:var(--muted);font-size:12px}
.duechip{font-size:12px;border-radius:6px;padding:3px 6px;margin-top:4px;background:var(--soft);cursor:pointer}
.duechip.overdue{background:var(--red-bg);color:var(--red)} .duechip.today{background:var(--orange-bg);color:var(--orange)} .duechip.soon{background:var(--amber-bg);color:var(--amber)} .duechip.done{text-decoration:line-through;opacity:.6}
.fab{position:fixed;right:max(18px,calc(50% - 460px + 18px));bottom:22px;border:0;background:var(--ink);color:#fff;border-radius:28px;padding:14px 20px;font-weight:600;box-shadow:0 6px 18px rgba(0,0,0,.2);cursor:pointer;font-size:15px}
.toggle-done{margin-top:16px}
/* modal */
.overlay{position:fixed;inset:0;background:rgba(28,27,25,.45);display:none;align-items:flex-end;justify-content:center;z-index:20}
.overlay.open{display:flex}
@media(min-width:600px){.overlay{align-items:center}}
.sheet{background:var(--card);width:100%;max-width:520px;max-height:92vh;overflow:auto;border-radius:16px 16px 0 0;padding:18px}
@media(min-width:600px){.sheet{border-radius:16px}}
.sheet h2{margin-top:0}
label.f{display:block;font-size:13px;font-weight:500;color:var(--muted);margin:12px 0 4px}
.in{width:100%;border:1px solid #d6d1c5;border-radius:9px;padding:9px 10px;background:#fff}
.in:focus{outline:2px solid var(--blue);outline-offset:-1px}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.swatches{display:flex;gap:8px;flex-wrap:wrap}
.sw{width:30px;height:30px;border-radius:50%;border:3px solid #fff;box-shadow:0 0 0 1px var(--line);background:var(--c);cursor:pointer;padding:0}
.sw.on{box-shadow:0 0 0 2px var(--ink)}
.mrow{border:1px solid var(--line);border-radius:10px;padding:8px;margin-bottom:8px}
.daypick{display:flex;gap:4px;flex-wrap:wrap;margin-bottom:6px}
.dp{border:1px solid var(--line);background:#fff;border-radius:8px;min-width:36px;padding:5px 0;cursor:pointer;font-size:13px}
.dp.on{background:var(--ink);color:#fff;border-color:var(--ink)}
.times{display:flex;gap:6px;align-items:center}
.times .in{flex:1}
.actions{display:flex;gap:8px;margin-top:18px;align-items:center}
.actions .sp{flex:1}
.err{color:var(--red);font-size:13px;margin-top:8px;min-height:1em}
.chk{display:flex;gap:8px;align-items:center;margin-top:12px}
.legend{display:flex;flex-wrap:wrap;gap:12px;font-size:12px;color:var(--muted);margin-top:10px}
.legend i{display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:4px;vertical-align:-1px}
/* login + account */
.login{max-width:380px;margin:12vh auto 0;padding:0 16px}
.login .card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:22px}
.login h1{margin:0 0 4px}
.login p.sub{color:var(--muted);margin:0 0 8px}
.login .btn{width:100%;margin-top:16px;padding:11px}
.acct{font-size:14px;color:var(--muted);margin-top:18px;padding-top:14px;border-top:1px solid var(--line)}
.acct .actions{margin-top:10px;flex-wrap:wrap}
.loading{color:var(--muted);text-align:center;padding:40px 0}
.notice{background:var(--amber-bg);border:1px solid #f0e0b0;border-radius:10px;padding:8px 12px;font-size:13px;margin-bottom:12px}


/* parent view */
.whobar{display:flex;align-items:center;gap:8px;flex-wrap:wrap;background:var(--card);border:1px solid var(--line);border-radius:10px;padding:8px 12px;margin:-6px 0 14px;font-size:14px}
.whobar[hidden]{display:none}
.whobar select{width:auto;padding:5px 8px}
.whobar .mode{margin-left:auto;font-size:12px;font-weight:600;border-radius:20px;padding:2px 10px;background:var(--soft);color:var(--muted)}
.ro .fab,.ro [data-act=addCourse],.ro [data-act=editCourse]{display:none}
.ro .check{pointer-events:none}
.acct b{color:var(--ink)}
.shares{display:flex;flex-direction:column;gap:6px;margin:8px 0}
.share{display:flex;align-items:center;gap:8px}
.share .nm{flex:1;color:var(--ink);font-weight:500}
.share select{width:auto;padding:5px 8px}
.share .lock{font-size:12px;background:var(--soft);border-radius:20px;padding:2px 10px}
.share .iconbtn.armed{width:auto;padding:0 8px;color:var(--red);border-color:#efc2ba;font-size:12px}
.none{color:var(--muted)}
.addshare{display:flex;gap:6px;margin-top:6px}
.addshare input{flex:1;min-width:0}
.addshare select{width:auto}
.hint{font-size:12px;color:var(--muted);margin-top:6px}
.whobar .leave{color:var(--red);font-size:13px}
.alt{text-align:center;font-size:14px;color:var(--muted);margin:14px 0 0}
.alt a{color:var(--blue)}
.in.code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:.08em;text-transform:uppercase}
.invinfo{background:var(--blue-bg);border-radius:10px;padding:10px 12px;margin-top:12px;font-size:14px}
.invinfo .link{margin-top:4px;color:var(--blue);font-weight:500}
.invbox{margin-top:8px}
.invrow{display:flex;gap:8px;align-items:center;font-size:14px;padding:3px 0}
.invrow .what{flex:1}
.invrow code,.newcode code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
.newcode{background:var(--soft);border-radius:12px;padding:14px;text-align:center;margin:10px 0}
.newcode code{display:block;font-size:24px;letter-spacing:.1em;font-weight:600;margin:4px 0 8px;user-select:all}
.newcode .url{font-size:12px;color:var(--muted);word-break:break-all;user-select:all}
.radios{display:flex;flex-direction:column;gap:6px;margin-top:6px}
.radios label{display:flex;gap:8px;align-items:flex-start;font-size:14px;cursor:pointer}

/* lectures */
.parent .tab-lec{display:none}
.tabs button{padding:9px 4px}
.lecbar{display:flex;gap:8px;margin-bottom:12px}
.lecbar .btn{flex:1;padding:11px}
.btn.rec{display:inline-flex;align-items:center;justify-content:center;gap:8px}
.recdot{width:10px;height:10px;border-radius:50%;background:var(--red);display:inline-block}
.btn.primary .recdot{background:#ff5a43}
.recdot.live{animation:pulse 1.2s infinite}
@keyframes pulse{50%{opacity:.25}}
.item.lec{align-items:center}
.lecicon{flex:none;width:34px;height:34px;border-radius:50%;background:var(--soft);display:grid;place-items:center;color:var(--muted)}
.badge{font-size:11px;font-weight:600;border-radius:20px;padding:2px 9px;background:var(--soft);color:var(--muted);white-space:nowrap}
.badge.st-ok{background:var(--green-bg);color:var(--green)} .badge.st-work{background:var(--blue-bg);color:var(--blue)}
.badge.st-bad{background:var(--red-bg);color:var(--red)} .badge.st-up{background:var(--amber-bg);color:var(--amber)}
.item.lec .due{display:flex;flex-direction:column;align-items:flex-end;gap:2px}
.storage{font-size:12px;color:var(--muted);margin-top:16px;display:flex;align-items:center;gap:8px}
.storage .bar,.progress{flex:0 0 120px;height:6px;background:var(--soft);border-radius:3px;overflow:hidden}
.storage .bar i,.progress i{display:block;height:100%;background:var(--ink);width:0}
.progress{flex:none;width:100%;margin-top:14px;height:8px}
.tips{font-size:13px;color:var(--muted);padding-left:18px;margin:14px 0 0}
.tips li{margin-bottom:4px}
.recscreen{text-align:center;padding:10px 0}
.recstate{display:flex;align-items:center;justify-content:center;gap:8px;font-weight:600;color:var(--red)}
.rectime{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:52px;font-weight:600;margin:12px 0;letter-spacing:-1px}
.meter{height:10px;background:var(--soft);border-radius:5px;overflow:hidden;max-width:320px;margin:0 auto}
.meter i{display:block;height:100%;width:0;background:var(--green);transition:width .08s}
.recup{font-size:13px;color:var(--muted);margin-top:14px}
.recup.warn{color:var(--amber)} .recup.bad{color:var(--red)}
.warnbox{background:var(--red-bg);color:var(--red);border-radius:10px;padding:10px 12px;font-size:14px;margin-top:14px;text-align:left}
.warnbox[hidden]{display:none}
.actions.center{justify-content:center}
.actions.center .btn{min-width:120px;padding:11px 16px}
.sheet.wide{max-width:760px}
.lechead{display:flex;gap:10px;align-items:flex-start}
.lechead h2{flex:1;margin-bottom:4px}
.sheet audio{width:100%;margin:12px 0}
#lecSearch{margin-bottom:8px}
.transcript{max-height:46vh;overflow:auto;border:1px solid var(--line);border-radius:10px;padding:6px 4px}
.seg{display:flex;gap:10px;margin:0;padding:5px 8px;border-radius:6px;cursor:pointer;line-height:1.5}
.seg:hover{background:var(--soft)}
.seg.now{background:var(--blue-bg)}
.seg[hidden]{display:none}
.seg .ts{flex:none;width:52px;color:var(--muted);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px;padding-top:3px}
.seg mark{background:#ffe58a;border-radius:2px}

/* notes */
@media(max-width:520px){.tabs button{font-size:13px;padding:9px 2px}}
.lecbar .in{flex:1.4;min-width:0}
.item.note{cursor:pointer}
.snippet{font-size:13px;color:var(--muted);margin-top:4px;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.noteed .notetitle{font-family:"Iowan Old Style","Palatino Linotype",Palatino,Georgia,serif;font-size:20px;font-weight:600;border-color:transparent;padding-left:4px}
.noteed .notetitle:hover{border-color:var(--line)}
.notebar{display:flex;align-items:center;gap:8px;margin:8px 0}
.notebar select{width:auto;max-width:60%}
.notebar .sp{flex:1}
.notebody{height:52vh;resize:vertical;line-height:1.55;font-size:15px;tab-size:4}

/* files */
.tabs{overflow-x:auto;scrollbar-width:none}
.tabs::-webkit-scrollbar{display:none}
.tabs button{flex:1 0 auto;white-space:nowrap;padding:9px 10px}
@media(max-width:520px){.tabs button{font-size:13px;padding:9px 7px}}
.coursecard .top{flex-wrap:wrap}
.coursecard .top .btn{flex:none}
.item.file{align-items:center;cursor:pointer}
.ftype{flex:none;width:40px;height:46px;border-radius:6px;display:grid;place-items:center;font-size:10px;font-weight:700;letter-spacing:.03em;color:#fff;background:#8a857b;position:relative}
.ftype.k-pdf{background:#c8321e}.ftype.k-slides{background:#d2600f}.ftype.k-doc{background:#2f5fa7}.ftype.k-sheet{background:#2e7d4f}
.ftype.k-image{background:#8a4fbf}.ftype.k-text{background:#5f5a50}.ftype.k-audio,.ftype.k-video{background:#0f8b8d}
.lechead .ftype{margin-top:2px}
.dropzone.over{outline:2px dashed var(--blue);outline-offset:4px;border-radius:12px}
.droptip{margin-top:6px}
@media(hover:none){.droptip{display:none}}
.uplist{margin-top:12px;display:flex;flex-direction:column;gap:8px}
.uprow{display:grid;grid-template-columns:1fr auto;gap:2px 8px;font-size:13px}
.uprow .nm{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.uprow .sz{color:var(--muted)}
.uprow .progress{grid-column:1/-1;margin:0;height:5px}
.uprow.ok .progress i{background:var(--green)}
.uprow.bad .sz{color:var(--red)}
a.btn{text-decoration:none;color:inherit;display:inline-block}
a.btn.primary{color:#fff}
.cardlinks{display:flex;gap:6px;margin-top:10px}
.cardlinks .btn{flex:1}
@media(max-width:520px){
  .tabs{display:grid;grid-template-columns:repeat(3,1fr);overflow:visible}
  .tabs button{font-size:14px;padding:8px 4px}
  .parent .tabs{grid-template-columns:repeat(3,1fr)}
}

/* study guides */
.guidecard{display:flex;gap:12px;align-items:center;background:var(--card);border:1px solid var(--line);border-left:5px solid var(--blue);border-radius:var(--radius);padding:10px 12px;margin-bottom:12px}
.guidecard .main{flex:1;min-width:0;cursor:default}
.guidecard .hint{margin-top:2px}
.guidecard .err{margin-top:4px;min-height:0}
.spin{flex:none;width:20px;height:20px;border-radius:50%;border:3px solid var(--blue-bg);border-top-color:var(--blue);animation:spin 1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.quick{display:flex;gap:6px;margin-top:8px;flex-wrap:wrap}
.quick .chip{padding:4px 10px;font-size:13px}
.checks{display:grid;grid-template-columns:1fr 1fr;gap:6px;font-size:14px}
.checks .cnt{color:var(--muted);font-size:12px}
.md{overflow:auto;border:1px solid var(--line);border-radius:9px;padding:6px 16px;line-height:1.55;font-size:15px}
.md h2{font-size:22px;margin:14px 0 6px}.md h3{font-size:18px;margin:18px 0 6px;font-family:inherit;font-weight:700}
.md h4{font-size:15px;margin:14px 0 4px}.md h5{font-size:14px;margin:12px 0 4px}
.md p{margin:8px 0}.md ul,.md ol{padding-left:22px;margin:6px 0}.md li{margin:3px 0}.md li.sub{margin-left:18px;list-style:circle}
.md code{background:var(--soft);border-radius:4px;padding:1px 5px;font-size:13px}
.md pre{background:var(--soft);border-radius:8px;padding:10px;overflow:auto}.md pre code{background:none;padding:0}
.md blockquote{border-left:3px solid var(--line);margin:8px 0;padding:2px 12px;color:var(--muted)}
.md .tablewrap{overflow:auto}.md table{border-collapse:collapse;font-size:14px;margin:8px 0}.md th,.md td{border:1px solid var(--line);padding:4px 8px;text-align:left}
.md li.fc{list-style:none;margin-left:-22px}
.flash{border:1px solid var(--line);border-radius:10px;padding:8px 12px;margin:6px 0;background:#fff}
.flash summary{cursor:pointer;font-weight:600;list-style:none}
.flash summary::before{content:"Q  ";color:var(--blue);font-weight:700}
.flash[open]{background:var(--green-bg)}
.flash div{margin-top:6px}.flash div::before{content:"A  ";color:var(--green);font-weight:700}
.notebody[hidden]{display:none}