:root{
  --ink:#342721;
  --latte:#DDC5A3;
  --cream:#F4EBDD;
  --paper:#FFFBF4;
  --mute:#5F4834;
  --line:#E4D3B8;
  --bad:#C9724B;
  --ok:#6F7D5A;
  --side:240px;
  --max:760px;
  --r:12px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
html{overflow-x:hidden}
body{
  font:16px/1.5 "Segoe UI",system-ui,sans-serif;
  color:var(--ink);
  background:var(--cream);
  min-height:100vh;
}
a{color:var(--ink);text-decoration:none}
img{max-width:100%;display:block}
button,input,select,textarea{font:inherit;color:inherit}
.side button.out{
  background:none;border:0;color:var(--latte);cursor:pointer;
  padding:10px 12px;text-align:left;width:100%;border-radius:10px;font-size:14px;opacity:.85;
}
.side button.out:hover{background:#4a372e}

.layout{display:flex;min-height:100vh}
.side{
  width:var(--side);flex-shrink:0;
  background:var(--ink);color:var(--latte);
  padding:24px 16px 16px;
  display:flex;flex-direction:column;gap:8px;
  position:sticky;top:0;height:100vh;
}
.side a{color:var(--latte);display:flex;align-items:center;gap:10px;
  padding:10px 12px;border-radius:10px;min-height:44px}
.side a.on,.side a:hover{background:#4a372e}
.brand{
  display:flex;align-items:center;gap:10px;
  padding:0 8px 16px;border-bottom:1px solid #4a372e;margin-bottom:8px;
}
.brand img{width:40px;height:40px;border-radius:50%;object-fit:cover}
.brand b{font-size:18px;font-weight:650}
.side .sp{flex:1}

.main{flex:1;padding:40px 48px 48px;min-width:0}
.col{max-width:var(--max);margin:0 auto}

h1{font-size:22px;font-weight:650;margin:0 0 16px}
h2{font-size:16px;font-weight:650;margin:0 0 10px}
.muted{color:var(--mute);font-size:14px}
.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px}

.card{
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:var(--r);
  padding:16px;
  margin:0 0 12px;
}
.card.now{border-left:4px solid var(--latte)}

.chip{
  display:inline-block;background:var(--latte);color:var(--ink);
  border-radius:8px;padding:2px 8px;font-size:13px;
}
.seg{display:flex;border:1px solid var(--line);border-radius:10px;overflow:hidden;margin:0 0 16px}
.seg a{flex:1;text-align:center;padding:10px 8px;background:var(--paper);min-height:44px;display:flex;align-items:center;justify-content:center}
.seg a.on{background:var(--ink);color:var(--latte)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--ink);color:var(--latte);
  border:0;border-radius:10px;padding:10px 16px;cursor:pointer;
  text-align:center;min-height:44px;
}
.btn.wide{width:100%}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
.btn.bad{background:var(--bad);color:#fff}

label{display:block;font-size:13px;color:var(--mute);margin:0 0 4px}
input[type=text],input[type=password],input[type=date],input[type=file],
select,textarea{
  width:100%;background:var(--paper);border:1px solid var(--line);
  border-radius:10px;padding:10px 12px;margin:0 0 12px;font-size:16px;
}
textarea{min-height:90px;resize:vertical}
input:focus,select:focus,textarea:focus{outline:2px solid var(--latte);border-color:var(--latte)}

.err{background:#f3e1d6;color:#6b3a28;border-radius:10px;padding:10px 12px;margin:0 0 12px}
.ok{background:#e4ead8;color:#3d4a32;border-radius:10px;padding:10px 12px;margin:0 0 12px}
.flash{background:var(--latte);border-radius:10px;padding:10px 12px;margin:0 0 12px}

.login{
  min-height:100vh;display:flex;align-items:center;justify-content:center;
  padding:24px;padding-bottom:calc(24px + env(safe-area-inset-bottom));
}
.login-box{width:100%;max-width:400px}
.login-box .hero{
  width:120px;height:120px;object-fit:cover;border-radius:16px;
  margin:0 auto 16px;border:1px solid var(--line);
}
.login-box h1{text-align:center}
.code6{display:flex;gap:6px;margin:0 0 12px}
.code6 input{
  width:100%;text-align:center;font-size:20px;letter-spacing:0;
  padding:10px 0;margin:0;min-height:44px;
}

.lesson{display:grid;grid-template-columns:64px 1fr 52px;gap:8px;padding:8px 0;
  border-bottom:1px solid var(--line);align-items:center}
.lesson:last-child{border-bottom:0}
.lesson .t{font-variant-numeric:tabular-nums;color:var(--mute);font-size:14px}
.dot{width:8px;height:8px;border-radius:50%;background:var(--latte);display:inline-block}

.post-hd{display:flex;justify-content:space-between;gap:8px;font-size:14px;margin:0 0 8px;flex-wrap:wrap}
.react{display:flex;gap:8px;margin-top:10px;flex-wrap:wrap}
.react button{background:var(--cream);border:1px solid var(--line);border-radius:8px;padding:8px 12px;cursor:pointer;min-height:44px}
.react button.on{background:var(--latte)}

.av{
  width:96px;height:96px;border-radius:50%;object-fit:cover;
  background:linear-gradient(#DDC5A3,#B98D5E);
  display:flex;align-items:center;justify-content:center;font-size:40px;
}
.av.sm{width:40px;height:40px;font-size:18px}

.bot{display:none}
.list a.person,.person{display:flex;gap:12px;align-items:center;padding:10px 0;border-bottom:1px solid var(--line);min-height:44px}
.file-preview{margin-top:8px;border-radius:10px;overflow:hidden;border:1px solid var(--line)}
.file-preview img,.file-preview video{width:100%;max-height:360px;object-fit:contain;background:#eee}
.rules{white-space:pre-line}
.empty{text-align:center;color:var(--mute);padding:32px 8px}
.fab{
  position:fixed;right:20px;bottom:24px;width:52px;height:52px;border-radius:50%;
  background:var(--ink);color:var(--latte);display:flex;align-items:center;justify-content:center;
  font-size:28px;line-height:1;
}
.table-wrap{overflow-x:auto}

@media (min-width: 1100px){
  .main{padding:48px 64px}
  .col{max-width:760px}
}

@media (max-width: 800px){
  .side{display:none}
  .bot{
    display:flex;position:fixed;bottom:0;left:0;right:0;
    background:var(--ink);padding:8px 8px calc(8px + env(safe-area-inset-bottom));
    z-index:20;
  }
  .bot a{
    color:var(--latte);flex:1;text-align:center;font-size:12px;
    min-height:44px;display:flex;align-items:center;justify-content:center;border-radius:8px;
  }
  .bot a.on{background:#4a372e}
  .main{padding:16px 16px calc(96px + env(safe-area-inset-bottom))}
  .grid2{grid-template-columns:1fr}
  .fab{bottom:calc(84px + env(safe-area-inset-bottom))}
  .lesson{grid-template-columns:56px 1fr 44px}
  h1{font-size:20px}
  .login-box .hero{width:96px;height:96px}
}