@font-face{font-family:"Atkinson Hyperlegible";src:url(fonts/atkinson-hyperlegible-latin-400-normal.woff2) format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:"Atkinson Hyperlegible";src:url(fonts/atkinson-hyperlegible-latin-700-normal.woff2) format("woff2");font-weight:700;font-display:swap}
@font-face{font-family:"Bricolage Grotesque";src:url(fonts/bricolage-grotesque-latin-600-normal.woff2) format("woff2");font-weight:600;font-display:swap}
:root{
  --air:#17408b;--air-deep:#102f69;--post:#c8202f;--paper:#f4f6fa;--ink:#162033;--muted:#566176;--rule:#d9dfea;--sel:#e4ebf8;--white:#fff;--ok:#16693a;
  --stripe:repeating-linear-gradient(135deg,var(--post) 0 14px,var(--white) 14px 24px,var(--air) 24px 38px,var(--white) 38px 48px);
  --body:"Atkinson Hyperlegible",system-ui,sans-serif;--display:"Bricolage Grotesque",var(--body);
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{height:100%;margin:0}
body{font:15px/1.45 var(--body);color:var(--ink);background:var(--paper)}
h1,h2,h3{font-family:var(--display);font-weight:600;margin:0;line-height:1.2}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--post);outline-offset:2px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}
.only-mobile{display:none}

/* Buttons and fields */
.btn{border:1px solid var(--rule);background:var(--white);border-radius:6px;padding:8px 14px;cursor:pointer}
.btn:hover{border-color:var(--air)}
.btn:disabled{opacity:.5;cursor:default}
.btn.primary{background:var(--air);border-color:var(--air);color:var(--white);font-weight:700}
.btn.primary:hover{background:var(--air-deep)}
.btn.danger{color:var(--post)}
.btn.small{padding:4px 10px;font-size:13px}
.btn.wide{width:100%}
.icon-btn{border:0;background:none;font-size:20px;padding:4px 8px;cursor:pointer}
.link-btn{display:block;border:0;background:none;color:inherit;padding:4px 0;cursor:pointer;text-align:left}
.link-btn:hover{text-decoration:underline}
input[type=text],input[type=email],input[type=password],input[type=search],input[type=number],select,textarea{width:100%;border:1px solid var(--rule);border-radius:6px;background:var(--white);padding:8px 10px}
label{display:block;font-weight:700;font-size:13px;margin:12px 0 4px}
.form-error{color:var(--post);margin:10px 0 0}
.check{display:inline-flex;gap:6px;align-items:center;font-weight:400;font-size:13px;margin:0;color:var(--muted)}

/* Sign-in: an airmail envelope */
.login{min-height:100%;display:grid;place-items:center;padding:16px;background:var(--air)}
.envelope{width:100%;max-width:400px;background:var(--white);padding:40px 32px 32px;border-radius:4px;border:12px solid transparent;
  background:linear-gradient(var(--white),var(--white)) padding-box,var(--stripe) border-box}
.envelope h1{font-size:32px;color:var(--air)}
.lede{color:var(--muted);margin:6px 0 16px}
.envelope .btn{margin-top:20px;padding:10px}

/* Three panes */
.shell{height:100vh;height:100dvh;display:grid;grid-template-columns:232px minmax(320px,400px) 1fr}
.rail{background:var(--air);color:var(--white);display:flex;flex-direction:column;padding:16px 12px;min-height:0;overflow:auto}
.brand{font:600 20px var(--display);padding:0 6px 12px}
.switch{background:var(--air-deep);color:var(--white);border-color:transparent;font-size:13px}
.compose-btn{margin:12px 0;background:var(--white);color:var(--air);font-weight:700;border:0}
.folders{list-style:none;margin:0;padding:0;flex:1}
.folders button{display:flex;justify-content:space-between;gap:8px;width:100%;border:0;background:none;color:inherit;padding:7px 10px;border-radius:6px;cursor:pointer;text-align:left}
.folders button:hover{background:var(--air-deep)}
.folders .saved-item{border-top:1px solid #ffffff33;margin-top:6px;padding-top:6px}
.folders button[aria-current=true]{background:var(--white);color:var(--air);font-weight:700}
.folders .count{font-weight:700}
.rail-foot{border-top:1px solid #ffffff33;margin-top:12px;padding:10px 6px 0;font-size:13px}
.who{opacity:.8;margin-top:6px;word-break:break-word}

.list-pane{display:flex;flex-direction:column;min-height:0;border-right:1px solid var(--rule);background:var(--white)}
.list-head{display:flex;gap:6px;padding:12px;align-items:center}
.list-head form{flex:1}
.list-tools{display:flex;justify-content:space-between;align-items:center;padding:0 12px 8px;border-bottom:1px solid var(--rule)}
.list-tools h2{font-size:18px}
.messages{list-style:none;margin:0;padding:0;overflow:auto;flex:1}
.messages>li>button{display:grid;grid-template-columns:1fr auto;gap:0 8px;width:100%;border:0;border-bottom:1px solid var(--rule);background:none;padding:9px 12px 9px 14px;text-align:left;cursor:pointer;position:relative}
.messages>li>button:hover{background:var(--paper)}
.messages>li>button[aria-current=true]{background:var(--sel)}
.m-from,.m-subject{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.m-date{font-size:12px;color:var(--muted);white-space:nowrap}
.m-subject{grid-column:1/-1;color:var(--muted);font-size:14px}
.m-marks{font-size:12px;color:var(--muted);margin-left:6px}
.unread .m-from,.unread .m-subject{font-weight:700;color:var(--ink)}
.unread>button::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--post)}
.empty{padding:32px 20px;color:var(--muted);text-align:center}
.notice{margin:12px;padding:10px 12px;background:#fdecee;border-left:4px solid var(--post);border-radius:0 6px 6px 0;overflow-wrap:anywhere}
.pager{display:flex;justify-content:space-between;align-items:center;padding:8px 12px;border-top:1px solid var(--rule);font-size:13px;color:var(--muted)}

/* Reader */
.reader{display:flex;flex-direction:column;min-height:0;min-width:0;overflow:auto;background:var(--paper)}
.r-tools{display:flex;flex-wrap:wrap;gap:6px;padding:12px 16px;position:sticky;top:0;background:var(--paper);border-bottom:1px solid var(--rule);z-index:1}
.r-tools select{width:auto;padding:4px 8px;font-size:13px}
.r-sheet{margin:16px;background:var(--white);border:1px solid var(--rule);border-radius:6px;padding:20px 24px}
.r-sheet h2{font-size:22px;margin-bottom:12px;overflow-wrap:anywhere}
.r-meta{color:var(--muted);font-size:14px;margin-bottom:14px;overflow-wrap:anywhere}
.r-meta b{color:var(--ink)}
.r-images{display:flex;gap:12px;align-items:center;background:var(--paper);padding:6px 10px;border-radius:6px;margin-bottom:12px;font-size:13px}
.r-frame{width:100%;border:0;display:block;min-height:120px}
.r-text{white-space:pre-wrap;overflow-wrap:anywhere;max-width:80ch;margin:0;font:inherit}
.r-files{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;padding-top:12px;border-top:1px solid var(--rule)}
.file{display:inline-block;padding:6px 10px;border:1px solid var(--rule);border-radius:6px;color:var(--air);text-decoration:none;font-size:13px;overflow-wrap:anywhere}
.file:hover{border-color:var(--air)}
.reader-empty{margin:auto;color:var(--muted);padding:24px;text-align:center}

/* Composer: the one other place the airmail edge appears */
.composer{position:fixed;right:24px;bottom:0;width:min(680px,calc(100vw - 48px));height:min(640px,calc(100dvh - 32px));background:var(--white);display:flex;flex-direction:column;border-radius:8px 8px 0 0;box-shadow:0 12px 40px #10204066;z-index:10;overflow:hidden}
.composer::before{content:"";height:8px;flex:none;background:var(--stripe)}
.c-head{display:flex;justify-content:space-between;align-items:center;padding:8px 14px}
.c-head h3{font-size:16px}
.c-from{padding:0 14px 4px;font-size:13px;color:var(--muted)}
.c-row{display:flex;align-items:center;border-top:1px solid var(--rule);padding:0 14px}
.c-row label{margin:0;width:56px;font-weight:400;color:var(--muted);font-size:14px;flex:none}
.c-row input{border:0;border-radius:0;padding:8px 0;flex:1;min-width:0}
.c-row input:focus{outline:none}
.c-row:focus-within{border-top-color:var(--air)}
.c-toolbar{display:flex;gap:2px;padding:4px 10px;border-top:1px solid var(--rule);border-bottom:1px solid var(--rule)}
.c-toolbar button{border:0;background:none;min-width:30px;height:28px;border-radius:4px;cursor:pointer}
.c-toolbar button:hover{background:var(--sel)}
.c-editor{flex:1;overflow:auto;padding:12px 14px;min-height:100px;overflow-wrap:anywhere}
.c-editor:focus{outline:none}
.c-editor img{max-width:100%;height:auto}
.c-editor blockquote{margin:8px 0 8px 4px;padding-left:10px;border-left:2px solid var(--rule);color:var(--muted)}
.c-files{display:flex;flex-wrap:wrap;gap:6px;padding:0 14px}
.chip{display:inline-flex;gap:6px;align-items:center;background:var(--paper);border-radius:6px;padding:3px 8px;font-size:13px;margin-bottom:6px;overflow-wrap:anywhere}
.chip button{border:0;background:none;cursor:pointer;padding:0 2px}
.c-foot{display:flex;gap:8px;align-items:center;padding:10px 14px;border-top:1px solid var(--rule)}
.c-foot .spacer{flex:1}
.c-error{padding:0 14px;color:var(--post);font-size:14px;overflow-wrap:anywhere}

/* Admin */
.admin{grid-column:2/-1;overflow:auto;background:var(--paper);padding:20px 24px}
.a-head{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;align-items:center;margin-bottom:16px}
.a-head h2{font-size:24px}
.tabs{display:flex;gap:4px;margin-bottom:16px;border-bottom:1px solid var(--rule)}
.tabs button{border:0;background:none;padding:8px 12px;cursor:pointer;border-bottom:3px solid transparent;margin-bottom:-1px}
.tabs button[aria-selected=true]{border-bottom-color:var(--post);font-weight:700}
.table-wrap{overflow:auto;background:var(--white);border:1px solid var(--rule);border-radius:6px}
table.grid{border-collapse:collapse;width:100%;font-size:14px}
table.grid th{text-align:left;font-size:13px;color:var(--muted);font-weight:700;padding:9px 12px;border-bottom:1px solid var(--rule);white-space:nowrap}
table.grid td{padding:9px 12px;border-bottom:1px solid var(--rule);vertical-align:top}
table.grid tr:last-child td{border-bottom:0}
.actions{display:flex;gap:6px;flex-wrap:wrap}
.status-ok{color:var(--ok)}
.status-bad{color:var(--post);font-weight:700}
.status-off{color:var(--muted)}
.sub{color:var(--muted);font-size:13px}

/* Dialog and toast */
.dialog{border:0;border-radius:8px;padding:0;width:min(520px,calc(100vw - 32px));max-height:calc(100dvh - 32px);box-shadow:0 12px 40px #10204066}
.dialog::backdrop{background:#10204080}
.d-body{padding:20px 24px}
.d-body h3{font-size:20px;margin-bottom:6px}
.d-foot{display:flex;justify-content:flex-end;gap:8px;padding:12px 24px 20px}
.staff-list{max-height:300px;overflow:auto;border:1px solid var(--rule);border-radius:6px;margin-top:8px}
.staff-list label{display:flex;gap:8px;align-items:flex-start;font-weight:400;font-size:14px;margin:0;padding:7px 10px;border-bottom:1px solid var(--rule);cursor:pointer}
.staff-list label:hover{background:var(--paper)}
.two{display:grid;grid-template-columns:1fr 100px;gap:0 8px}
details summary{cursor:pointer;margin-top:14px;color:var(--air)}
.toast{position:fixed;left:50%;bottom:20px;transform:translateX(-50%);background:var(--ink);color:var(--white);padding:9px 16px;border-radius:6px;z-index:20;max-width:calc(100vw - 32px)}

@media (max-width:900px){
  .only-mobile{display:inline-block}
  .shell{display:block;position:relative}
  .rail{position:fixed;inset:0 auto 0 0;width:260px;z-index:5;transform:translateX(-100%);transition:transform .15s}
  .rail.open{transform:none;box-shadow:0 0 0 100vmax #10204066}
  .list-pane{height:100%;border:0}
  .reader{position:fixed;inset:0;z-index:3;display:none}
  .shell.reading .reader{display:flex}
  .r-sheet{margin:8px;padding:14px}
  .admin{position:fixed;inset:0;z-index:4;padding:12px 16px}
  .composer{inset:0;width:100%;height:100%;border-radius:0}
}
@media (prefers-reduced-motion:reduce){.rail{transition:none}}

/* Student portal additions */
.new-btn{display:flex;justify-content:space-between;gap:8px;width:100%;border:0;border-radius:6px;background:var(--air-deep);color:var(--white);padding:9px 10px;margin-bottom:8px;cursor:pointer;font-weight:700;text-align:left}
.new-btn[aria-current=true]{background:var(--white);color:var(--air)}
.new-btn .count:not(:empty){background:var(--post);color:var(--white);border-radius:10px;padding:0 7px;font-size:13px}
.m-student{grid-column:1/-1;font-size:12px;color:var(--air);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.checked{font-size:13px;color:var(--muted);margin-bottom:12px}
.new-pill{display:inline-block;background:var(--post);color:var(--white);border-radius:10px;padding:0 8px;font-size:13px;font-weight:700}
.filter{max-width:320px;margin-bottom:12px}
.pw-show{font:700 18px/1.4 ui-monospace,Consolas,monospace;background:var(--paper);border-radius:6px;padding:8px 12px;overflow-wrap:anywhere;margin:6px 0 12px}
.link-plain{color:var(--air)}
.problems{margin:0 0 0;font-size:14px}
.with-suffix{display:flex;align-items:center;gap:8px}
.with-suffix input{flex:1;min-width:0}
.suffix{color:var(--muted);white-space:nowrap}
.pending{margin-bottom:20px}
.pending .a-head{margin-bottom:8px}
.pending h3{font-size:17px}