:root{color-scheme:light;--paper:#eef5fc;--surface:#fafdff;--ink:#1a2d43;--muted:#485e77;--line:#c5d7e8;--accent:#24578d;--on-accent:#fff;--wash:#deedfb;--bad:#8d362c;--focus:#305fc4}
*{box-sizing:border-box}
[hidden]{display:none!important}
body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.5 system-ui,sans-serif}
button,input,select,textarea{font:inherit;color:inherit}
button,select,input,textarea{border:1px solid var(--line);border-radius:8px;background:var(--surface);padding:8px 12px;min-height:44px}
button{cursor:pointer;font-weight:650}
button:hover{border-color:var(--accent)}
button:disabled{cursor:wait;opacity:.65}
button:focus-visible,select:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--focus);outline-offset:3px}
.primary{background:var(--accent);color:var(--on-accent);border-color:var(--accent)}
.frame{width:min(100% - 48px, 940px);margin-inline:auto}
.masthead{border-bottom:1px solid var(--line);background:var(--surface)}
.masthead-row,.toolbar,.brand,.tabs,.actions,.page-head,.week-control,.week,.legend{display:flex;align-items:center;gap:12px}
.masthead-row,.page-head{justify-content:space-between}
.masthead-row{min-height:72px}
.brand{font-weight:760;letter-spacing:-.025em;color:var(--accent)}
.toolbar{font-size:14px;gap:8px}
#groups{max-width:180px;font-weight:650}
#environment{color:var(--muted)}
.icon-button{width:44px;padding:0;font-size:24px;line-height:1}
.tabs{gap:20px;border-bottom:1px solid var(--line);overflow:auto}
.tabs button{flex:none;border:0;border-radius:0;background:transparent;padding:12px 0;color:var(--muted);border-bottom:2px solid transparent}
.tabs button[aria-current=page]{border-color:var(--accent);color:var(--accent)}
main{padding-block:28px 56px}
h1,h2,h3,p{margin:0}
h1{font-family:Georgia,serif;font-size:clamp(32px,6vw,52px);font-weight:500;line-height:1.12;letter-spacing:-.045em}
h2{font-size:22px;letter-spacing:-.025em}
h3{font-size:17px}
.page-head{align-items:flex-end;margin-bottom:24px}
.page-head p,.muted,.meta{color:var(--muted)}
.page-head p{margin-top:4px}
.actions,.legend{flex-wrap:wrap}
.week-control{justify-content:space-between;margin-bottom:12px}
.week{gap:0;background:var(--surface);border:1px solid var(--line);border-radius:12px;overflow:hidden;margin-bottom:24px}
.week button{flex:1;min-width:0;min-height:64px;border:0;border-radius:0;padding:4px 0;display:grid;place-content:center;font-weight:550;color:var(--muted);background:transparent}
.week button+button{border-left:1px solid var(--line)}
.week button strong{font-size:19px;font-variant-numeric:tabular-nums}
.week button[aria-pressed=true]{background:var(--accent);color:var(--on-accent)}
.section-head{margin-bottom:8px}
.list{border-block:1px solid var(--line);background:var(--surface)}
.row{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:12px 16px}
.row+.row{border-top:1px solid var(--line)}
.lesson{display:grid;grid-template-columns:66px minmax(0,1fr) auto}
.time{font-variant-numeric:tabular-nums;font-weight:750;align-self:start;color:var(--accent)}
.time small{display:block;color:var(--muted);font-weight:500}
.meta{font-size:14px;overflow-wrap:anywhere}
.row h3,.row p{overflow-wrap:anywhere}
.posts{white-space:pre-wrap;margin-top:4px}
.tag{display:inline-block;padding:2px 8px;background:var(--wash);color:var(--accent);border-radius:4px;font-size:13px}
.cancelled .tag{color:var(--bad)}
.empty{padding:24px 16px;border:1px dashed var(--line);color:var(--muted);border-radius:8px}
.journal{margin-top:24px}
.legend{gap:8px;margin:12px 0}
.legend span{padding:6px 10px;border-radius:4px;background:var(--wash);font-size:14px}
.mark{min-width:min(45%,190px);max-width:50%}
dialog{max-width:min(480px,calc(100% - 24px));width:100%;max-height:calc(100dvh - 24px);border:1px solid var(--line);border-radius:12px;background:var(--surface);color:var(--ink);padding:24px}
dialog::backdrop{background:#122640b3}
form{display:grid;gap:12px;margin-top:16px}
label{display:grid;gap:4px;font-weight:600;font-size:14px}
form input,form select,form textarea{width:100%;min-width:0;font-size:16px}
textarea{min-height:104px;resize:vertical}
.fields{display:grid;gap:8px;grid-template-columns:1fr 1fr}
.notice{position:fixed;z-index:2;right:12px;bottom:12px;max-width:min(440px,calc(100% - 24px));background:var(--ink);color:var(--paper);padding:12px 16px;border-radius:8px}
.error{color:var(--bad)}
details{margin:16px 0}
summary{cursor:pointer;color:var(--accent);padding:8px 0;font-weight:650}
a{color:var(--accent)}
@media(max-width:560px){
  .frame{width:calc(100% - 24px)}
  main{padding-top:20px}
  .masthead-row{min-height:60px}
  #groups{max-width:94px}
  .tabs{gap:16px}
  .page-head{align-items:flex-start;flex-direction:column;gap:12px;margin-bottom:16px}
  .row{padding:12px;gap:8px}
  .lesson{grid-template-columns:48px minmax(0,1fr)}
  .lesson .actions{grid-column:2}
}
@media(max-width:350px){#environment{display:none}}
@media(prefers-color-scheme:dark){
  :root{color-scheme:dark;--paper:#142131;--surface:#1b2b3e;--ink:#edf5ff;--muted:#b8cae0;--line:#425971;--accent:#a6d2ff;--on-accent:#132a43;--wash:#263e58;--bad:#ffaca0;--focus:#bed8ff}
  .brand svg path{stroke:var(--on-accent)}
}
@media(max-width:480px){
  .masthead-row{flex-wrap:wrap;column-gap:8px;row-gap:4px;padding-block:8px}
  #switch-user{font-size:12px;padding-inline:8px}
  .toolbar:has(#switch-user:not([hidden])){flex-wrap:wrap}
}
.schedule-preview{max-height:38vh;overflow:auto;overscroll-behavior:contain}

.schedule-tools{margin-bottom:12px}