:root{--red:#d4141c;--red-d:#a70f16;--red-bg:#fdeced;--ink:#111;--muted:#5f6368;--line:#e6e6e6;--bg:#f6f6f6;--card:#fff;--ok:#111;--err:#a70f16}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font:15px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;background:var(--bg);color:var(--ink);display:flex;flex-direction:column;min-height:100vh}
a{color:var(--red)}
.skip{position:absolute;left:-999px;top:0;background:var(--ink);color:#fff;padding:8px 12px;z-index:10}
.skip:focus{left:8px}

/* header */
header.top{background:#fff;border-top:4px solid var(--red);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}
.top-in{max-width:1180px;margin:0 auto;padding:10px 20px;display:flex;align-items:center;gap:20px}
.brand{display:flex;align-items:center;gap:14px;text-decoration:none;color:var(--ink);margin-right:auto}
.brand img{height:42px;width:auto;display:block}
.brand span{font-weight:700;font-size:15px;padding-left:14px;border-left:2px solid var(--ink);line-height:1.2}
nav.main{display:flex;align-items:center;gap:18px}
nav.main a{color:var(--ink);text-decoration:none;font-weight:500}
nav.main a:hover{color:var(--red)}
.who{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--muted)}

/* buttons */
button,.btn{font:inherit;cursor:pointer;border:2px solid var(--red);border-radius:6px;padding:8px 18px;background:var(--red);color:#fff;font-weight:600;text-decoration:none;display:inline-block;line-height:1.4}
button:hover,.btn:hover{background:var(--red-d);border-color:var(--red-d);color:#fff}
button:disabled{opacity:.5;cursor:default}
.btn.dark,button.dark{background:var(--ink);border-color:var(--ink)}
.btn.dark:hover,button.dark:hover{background:#333;border-color:#333}
.btn.ghost,button.ghost{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn.ghost:hover,button.ghost:hover{background:var(--ink);color:#fff}
.btn.lg{padding:12px 26px;font-size:16px}
nav.main a.btn{color:#fff}

/* layout */
main{max-width:760px;width:100%;margin:28px auto;padding:0 16px;flex:1}
main.wide{max-width:1180px}
.card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:22px;margin-bottom:18px}
h1,h2,h3{line-height:1.25}
h2{margin:0 0 14px;font-size:19px}
dl{display:grid;grid-template-columns:150px 1fr;gap:8px 12px;margin:0}
dt{color:var(--muted)} dd{margin:0;word-break:break-word}
label{display:block;font-weight:600;margin:12px 0 4px}
input,select{width:100%;padding:9px 11px;border:1px solid #c8c8c8;border-radius:6px;font:inherit;background:#fff;color:var(--ink)}
input:focus,select:focus{outline:2px solid #f3b6b9;border-color:var(--red)}
.email-box{background:#fff;border:2px solid var(--ink);border-left:6px solid var(--red);border-radius:6px;padding:14px 16px;font-size:18px;font-weight:700;word-break:break-all;margin:8px 0}
.msg{border-radius:6px;padding:11px 14px;margin:12px 0}
.msg.ok{background:#f2f2f2;border-left:4px solid var(--ink);color:var(--ink)}
.msg.err{background:var(--red-bg);border-left:4px solid var(--red);color:var(--err)}
.msg ul,.card ul{margin:6px 0 0 18px;padding:0}
.hint{color:var(--muted);font-size:13px}
.hidden{display:none!important}
.row{display:flex;gap:10px;justify-content:flex-end;margin-top:16px}
.row.start{justify-content:flex-start}
.mt{margin-top:12px}

/* landing */
.hero{background:var(--ink);color:#fff;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;right:-120px;top:-120px;width:380px;height:380px;border-radius:50%;background:var(--red);opacity:.9}
.hero-in{max-width:1180px;margin:0 auto;padding:64px 20px;position:relative;z-index:1}
.hero h1{font-size:clamp(28px,4.4vw,44px);margin:0 0 14px;max-width:680px}
.hero h1 em{font-style:normal;color:var(--red);background:#fff;padding:0 8px;border-radius:4px;-webkit-box-decoration-break:clone;box-decoration-break:clone}
.hero p{font-size:18px;max-width:620px;color:#ddd;margin:0 0 26px}
.hero .actions{display:flex;gap:12px;flex-wrap:wrap}
.hero .btn.ghost{color:#fff;border-color:#fff}
.hero .btn.ghost:hover{background:#fff;color:var(--ink)}
section.block{max-width:1180px;margin:0 auto;padding:56px 20px;width:100%}
section.block h2{font-size:26px;margin:0 0 6px}
section.block .lead{color:var(--muted);margin:0 0 28px}
.eyebrow{display:inline-block;color:var(--red);font-weight:700;letter-spacing:.08em;text-transform:uppercase;font-size:12px;margin-bottom:6px}
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;counter-reset:s;list-style:none;margin:0;padding:0}
.steps li{background:#fff;border:1px solid var(--line);border-top:4px solid var(--ink);border-radius:8px;padding:20px;counter-increment:s}
.steps li::before{content:counter(s);display:inline-grid;place-items:center;width:32px;height:32px;border-radius:50%;background:var(--red);color:#fff;font-weight:700;margin-bottom:10px}
.steps h3{margin:0 0 6px;font-size:17px}
.steps p{margin:0;color:var(--muted)}
.band{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.grid2{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px}
.feature{border-left:4px solid var(--red);padding:4px 0 4px 16px}
.feature h3{margin:0 0 4px;font-size:17px}
.feature p{margin:0;color:var(--muted)}
details{background:#fff;border:1px solid var(--line);border-radius:8px;padding:14px 18px;margin-bottom:10px}
details[open]{border-color:var(--ink)}
summary{cursor:pointer;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:12px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";color:var(--red);font-weight:700;font-size:20px;line-height:1}
details[open] summary::after{content:"\2212"}
details p{margin:10px 0 0;color:var(--muted)}
.cta{background:var(--red);color:#fff;border-radius:10px;padding:28px;display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap}
.cta h2{margin:0;font-size:22px}
.cta p{margin:4px 0 0;color:#ffe3e4}
.cta .btn{background:#fff;color:var(--red);border-color:#fff}
.cta .btn:hover{background:var(--ink);color:#fff;border-color:var(--ink)}

/* footer */
footer.foot{background:var(--ink);color:#bbb;border-top:4px solid var(--red);margin-top:auto}
.foot-in{max-width:1180px;margin:0 auto;padding:22px 20px;display:flex;gap:16px;justify-content:space-between;flex-wrap:wrap;font-size:14px}
.foot a{color:#fff;text-decoration:none;margin-left:16px}
.foot a:hover{color:var(--red)}

/* admin */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:12px;margin-bottom:18px}
.stat{background:#fff;border:1px solid var(--line);border-left:4px solid var(--ink);border-radius:8px;padding:14px 16px}
.stat:first-child{border-left-color:var(--red)}
.stat b{display:block;font-size:26px} .stat span{color:var(--muted);font-size:13px}
.tabs{display:flex;gap:6px;margin-bottom:12px}
.tabs button{background:#fff;color:var(--ink);border-color:var(--ink)}
.tabs button:hover{background:#eee;color:var(--ink)}
.tabs button.active{background:var(--ink);color:#fff}
.bar{display:flex;gap:10px;margin-bottom:12px} .bar input{max-width:320px} .bar select{max-width:160px}
.tablewrap{overflow:auto;border:1px solid var(--line);border-radius:8px;background:#fff}
table{border-collapse:collapse;width:100%;min-width:900px}
th,td{padding:9px 12px;text-align:left;border-bottom:1px solid var(--line);font-size:14px;vertical-align:top}
th{background:var(--ink);color:#fff;font-weight:600;position:sticky;top:0}
tbody tr:hover{background:#fafafa}
.badge{display:inline-block;padding:2px 9px;border-radius:99px;font-size:12px;font-weight:600}
.badge.student{background:var(--ink);color:#fff} .badge.staff{background:var(--red);color:#fff}
dialog{border:0;border-top:4px solid var(--red);border-radius:10px;padding:22px;width:min(420px,92vw);box-shadow:0 12px 40px rgba(0,0,0,.3)}
dialog::backdrop{background:rgba(0,0,0,.55)}

@media (max-width:640px){
  .brand span{display:none}
  .brand img{height:34px}
  nav.main a:not(.btn){display:none}
  dl{grid-template-columns:1fr}
  dt{font-weight:600;color:var(--ink)}
  .hero::after{width:200px;height:200px;right:-110px;top:-110px}
  .hero-in{padding:44px 20px}
}

/* ===================== shared controls ===================== */
button.sm,.btn.sm{padding:5px 12px;font-size:13px;border-width:1.5px}
button.block{width:100%;margin-top:16px;padding:11px}
button[aria-busy="true"]{color:#fff!important;opacity:.75;cursor:progress}
fieldset{border:0;margin:0;padding:0;min-width:0}
fieldset:disabled input{background:#f4f4f4}
.link-btn{background:none;border:0;color:var(--red);padding:4px 0;font-weight:600}
.link-btn:hover{background:none;color:var(--red-d);text-decoration:underline}
.link-btn:disabled{color:var(--muted);text-decoration:none}
.icon-btn{background:none;border:0;color:var(--ink);padding:6px;line-height:1;font-size:22px}
.icon-btn:hover{background:#f0f0f0;color:var(--ink)}
.pw{position:relative}
.pw input{padding-right:84px}
.pw-toggle{position:absolute;right:4px;top:50%;transform:translateY(-50%);padding:4px 10px;font-size:12px;background:#f0f0f0;color:var(--ink);border:0}
.pw-toggle:hover{background:#e2e2e2;color:var(--ink)}
.mono{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:13px;overflow-wrap:anywhere}
td.mono{min-width:210px}
.num{text-align:right;font-variant-numeric:tabular-nums}
.pill{display:inline-block;padding:2px 9px;border-radius:99px;font-size:12px;font-weight:600;background:#efefef;color:var(--ink);white-space:nowrap}
.pill.ok{background:#111;color:#fff}
.pill.warn{background:#fff1d6;color:#8a5300}
.pill.danger{background:var(--red-bg);color:var(--red-d)}
.empty{text-align:center;color:var(--muted);padding:26px!important}
.toasts{position:fixed;right:16px;bottom:16px;display:flex;flex-direction:column;gap:8px;z-index:50;max-width:min(380px,calc(100vw - 32px))}
.toast{background:#111;color:#fff;padding:11px 16px;border-radius:8px;border-left:4px solid #fff;box-shadow:0 8px 24px rgba(0,0,0,.25);font-size:14px;transition:opacity .4s,transform .4s}
.toast.err{border-left-color:var(--red)} .toast.info{border-left-color:#888}
.toast.out{opacity:0;transform:translateY(8px)}

/* ===================== auth ===================== */
.auth{max-width:440px;margin:48px auto}
.auth-card{padding:30px;border-top:4px solid var(--red)}
.auth-title{font-size:24px;margin:0 0 4px}
.otp-input{font-size:28px;letter-spacing:12px;text-align:center;font-family:ui-monospace,Consolas,monospace;padding:12px}
.otp-actions{display:flex;justify-content:space-between;gap:12px;margin-top:14px;flex-wrap:wrap}

/* ===================== app shell ===================== */
body.admin header.top .top-in{max-width:none}
.who-email{font-weight:600;color:var(--ink)}
.only-mobile{display:none}
.app{display:grid;grid-template-columns:232px minmax(0,1fr);flex:1;min-height:0}
.side{background:#111;color:#fff;padding:18px 12px;display:flex;flex-direction:column;gap:10px;position:sticky;top:69px;height:calc(100vh - 69px)}
.side nav{display:flex;flex-direction:column;gap:2px}
.side nav a{color:#d0d0d0;text-decoration:none;padding:10px 12px;border-radius:6px;display:flex;justify-content:space-between;align-items:center;font-weight:500;border-left:3px solid transparent}
.side nav a:hover{background:#1f1f1f;color:#fff}
.side nav a.active{background:#fff;color:#111;border-left-color:var(--red)}
.side .count{background:#333;color:#fff;border-radius:99px;font-size:12px;padding:1px 8px;min-width:24px;text-align:center}
.side nav a.active .count{background:#111}
.side .count.alert{background:var(--red)}
.side-foot{margin-top:auto;color:#8a8a8a;padding:0 12px;font-size:12px}
.scrim{position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:8}
.app main.content{max-width:1440px;width:100%;margin:0;padding:24px 28px 40px;min-width:0}
.view-head{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:16px;flex-wrap:wrap}
.view-head h1{font-size:24px;margin:0}
.card-head{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:12px;flex-wrap:wrap}
.card-head h2{margin:0}
.sm-link{font-size:13px;font-weight:600;text-decoration:none}
.grid-2{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,360px),1fr));gap:18px;margin-bottom:18px}
.grid-2 .card{margin:0}

/* KPIs */
.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:12px;margin-bottom:18px}
.kpi{background:#fff;border:1px solid var(--line);border-left:4px solid var(--ink);border-radius:8px;padding:14px 16px;display:flex;flex-direction:column;text-decoration:none;color:var(--ink);transition:box-shadow .15s}
a.kpi:hover{box-shadow:0 4px 14px rgba(0,0,0,.08)}
.kpi b{font-size:28px;line-height:1.2;font-variant-numeric:tabular-nums}
.kpi-label{font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);font-weight:600}
.kpi-sub{font-size:12px;color:var(--muted)}
.kpi.accent{border-left-color:var(--red)}
.kpi.danger{border-left-color:var(--red);background:var(--red-bg)}
.kpi.danger b{color:var(--red-d)}

/* chart & lists */
.chart svg{width:100%;height:auto;display:block}
.legend{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--muted)}
.sw{display:inline-block;width:10px;height:10px;border-radius:2px;margin-left:8px}
.sw.ink{background:#111} .sw.red{background:var(--red)}
.oldest{list-style:none;margin:0;padding:0}
.oldest li{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:10px 0;border-bottom:1px solid var(--line)}
.oldest li:last-child{border-bottom:0}
.hbar{min-width:120px;background:#f1f1f1;border-radius:3px;overflow:hidden;height:10px}
.hbar svg{display:block}

/* toolbar, tables, pager */
.toolbar{display:grid;grid-template-columns:minmax(200px,2fr) repeat(3,minmax(140px,1fr));gap:10px;margin-bottom:12px}
.tablewrap table{min-width:0}
td.actions{white-space:nowrap;text-align:right}
td.actions button+button{margin-left:6px}
.pager{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-top:12px;flex-wrap:wrap}
.pager-btns{display:flex;align-items:center;gap:10px}

/* dialogs */
dialog{width:min(560px,94vw);max-height:90vh;overflow:auto}
.dlg-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}
.dlg-head h2{margin:0}
#dlgIdle{width:min(420px,94vw)}

/* ===================== responsive ===================== */
@media (max-width:1000px){
  .toolbar{grid-template-columns:1fr 1fr}
  .toolbar input{grid-column:1/-1}
}
@media (max-width:860px){
  .only-mobile{display:inline-flex}
  .app{grid-template-columns:1fr}
  .side{position:fixed;left:0;top:0;bottom:0;height:auto;width:260px;z-index:9;transform:translateX(-100%);transition:transform .2s;padding-top:24px}
  .side.open{transform:none}
  .app main.content{padding:18px 14px 32px}
  .who-email{display:none}
  /* stacked card rows */
  .rtable thead{display:none}
  .rtable,.rtable tbody,.rtable tr,.rtable td{display:block;width:100%}
  .rtable tr{border-bottom:1px solid var(--line);padding:10px 12px}
  .rtable td{border:0;padding:4px 0;display:grid;grid-template-columns:120px 1fr;gap:8px;text-align:left;justify-items:start;align-items:baseline}
  .rtable td>.hint{grid-column:2}
  td.mono{min-width:0}
  .rtable td::before{content:attr(data-label);color:var(--muted);font-size:12px;font-weight:600}
  .rtable td:not([data-label]){display:block}
  .rtable td.actions{text-align:left;padding-top:8px}
  .rtable td.num{text-align:left}
  .rtable td.empty{display:block}
  .tablewrap{border-radius:8px}
}
@media (max-width:560px){
  .toolbar{grid-template-columns:1fr}
  .kpis{grid-template-columns:1fr 1fr}
  .kpi b{font-size:22px}
  .auth{margin:20px auto}
  .auth-card{padding:22px}
  .otp-input{letter-spacing:8px;font-size:24px}
  .view-head h1{font-size:20px}
  .pager{justify-content:center}
  dl{grid-template-columns:1fr}
}