/* Kirin Robotics Teaching Lab · portal pages (login, dashboard, lecturer). Light theme to
   match the simulators' visual identity: dark header with the orange rule. */
/* theme: deep purple + Kirin orange */
:root{--orange:#ed6b18;--orange-hi:#ff8a3e;--purple:#6a3fb5;--purple-d:#4b2a8a;--ink:#1f1633;--muted:#6c6280;
 --line:#ddd6ea;--bg:#f4f1f9;--paper:#fff;--blue:#2374d2;--green:#12805f;--red:#bc2b30;--head:#2b1650;
 --focus:#8a5cf6;color-scheme:light}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.5 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
a{color:var(--purple)}
button,input,select,textarea{font:inherit}
.hdr{display:flex;align-items:center;justify-content:space-between;gap:14px;background:var(--head);color:#f4f7fa;
 padding:14px 24px;padding-top:calc(14px + env(safe-area-inset-top,0px));border-bottom:3px solid var(--orange);flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:13px;min-width:0}
.brand-mark{font-size:22px;font-weight:850;color:#ff7b28;letter-spacing:-1px;white-space:nowrap}
.brand h1{font-size:17px;margin:0;font-weight:600}
.brand p{margin:1px 0 0;color:#c9b8e8;font-size:13px}
.hdr-right{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.who{font-size:14px;color:#e5dcf5;text-align:right;line-height:1.25}
.who small{display:block;color:#b6a5d6;font-size:12px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:1px solid var(--line);border-radius:7px;padding:8px 14px;
 background:#fff;color:var(--ink);font-weight:600;min-height:42px;cursor:pointer;text-decoration:none;white-space:nowrap}
.btn:hover{background:#f1ebfa}
.btn:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,a:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn.primary{background:var(--orange);border-color:var(--orange);color:#111a22}
.btn.primary:hover{background:var(--orange-hi)}
.btn.danger{color:var(--red);border-color:#e7b9ba}
.btn.small{min-height:34px;padding:5px 10px;font-size:13px}
.btn.dark{background:#3d2466;color:#f4eefc;border-color:#5a3d88}
.btn.dark:hover{background:#4b2d7c}
main{max-width:1180px;margin:0 auto;padding:22px 20px 40px}
h2{font-size:21px;margin:0 0 4px;letter-spacing:-.3px}
h3{font-size:17px;margin:0}
.sub{color:var(--muted);margin:0 0 18px;font-size:15px}
.card{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:18px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.sim-card{display:flex;flex-direction:column;gap:10px;border-top:4px solid var(--orange)}
.sim-card.sf{border-top-color:var(--purple)}
.sim-card p{margin:0;color:#4d4460;font-size:15px}
.sim-card .row{display:flex;gap:8px;flex-wrap:wrap;margin-top:auto}
.count{font-size:13.5px;color:var(--muted);overflow-wrap:anywhere}
.section{margin-top:26px}
.section-head{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:10px}
.tools{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.input,select.input{border:1px solid var(--line);background:#fff;border-radius:7px;padding:8px 10px;min-height:42px;color:var(--ink);min-width:0}
table{width:100%;border-collapse:collapse;background:#fff;font-size:14.5px}
th,td{text-align:left;padding:10px 12px;border-bottom:1px solid #ece7f4;vertical-align:middle}
th{font-size:12.5px;text-transform:uppercase;letter-spacing:.5px;color:var(--muted);font-weight:650;background:#f7f4fb}
tr:last-child td{border-bottom:0}
.table-wrap{border:1px solid var(--line);border-radius:12px;overflow:auto;background:#fff}
.tag{display:inline-block;font:600 12px/1.2 system-ui,-apple-system,"Segoe UI",sans-serif;padding:3px 8px;border-radius:12px;background:#f0ecf6;color:#584e6b;white-space:nowrap}
.tag.kn16{background:#fff1e4;color:#a84605}
.tag.smart_factory{background:#ede4fb;color:var(--purple-d)}
.tag.in_progress{background:#e2f0dd;color:#2a6b33}
.tag.project_created{background:#fdf0dd;color:#8c5a12}
.tag.not_started{background:#f0ecf6;color:#6c6280}
.tag.off{background:#fbe1e1;color:#a01f24}
.actions{display:flex;gap:6px;flex-wrap:wrap}
.muted{color:var(--muted)}
.empty{padding:22px;color:var(--muted);text-align:center}
.notice{font-size:13px;color:var(--muted);line-height:1.6;margin:30px 0 0;border-top:1px solid var(--line);padding-top:14px}
.stats{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.stat{background:#fff;border:1px solid var(--line);border-radius:10px;padding:12px 14px}
.stat label{display:block;font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.5px}
.stat b{font-size:24px;display:block;margin-top:2px;font-variant-numeric:tabular-nums}
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin:18px 0 14px;flex-wrap:wrap}
.tabs button{border:0;border-bottom:3px solid transparent;background:transparent;padding:10px 14px;font-weight:600;color:var(--muted);cursor:pointer;min-height:44px}
.tabs button[aria-selected=true]{border-bottom-color:var(--orange);color:var(--purple-d)}
.pane[hidden]{display:none}
.auth-wrap{min-height:calc(100vh - 80px);display:flex;align-items:center;justify-content:center;padding:24px 16px}
.auth-card{background:#fff;border-radius:16px;padding:26px;width:100%;max-width:420px;box-shadow:0 10px 36px #2b16502b;border-top:4px solid var(--orange);border:1px solid var(--line)}
.auth-card h2{margin-bottom:6px}
.field{display:flex;flex-direction:column;gap:5px;margin:0 0 14px;font-size:14.5px}
.field .input{width:100%}
.error{color:#a3231f;font-size:14px;min-height:1.2em;margin:0 0 10px}
.good{color:var(--green)}
.hint{font-size:13px;color:var(--muted);margin:0 0 12px;line-height:1.5}
pre.data{background:#f7f4fb;border:1px solid var(--line);border-radius:8px;padding:10px 12px;font:12.5px/1.55 ui-monospace,monospace;overflow:auto;max-height:420px;white-space:pre}
.kv{display:grid;grid-template-columns:auto 1fr;gap:4px 14px;font-size:14px;margin:0 0 12px}
.kv dt{color:var(--muted)}.kv dd{margin:0}
.prog{font:13px/1.6 ui-monospace,monospace;background:#fbf9fd;border:1px solid var(--line);border-radius:8px;padding:8px 12px;margin:6px 0 14px;overflow:auto}
.prog div{white-space:pre}
.skip{position:absolute;left:-999px}.skip:focus{left:10px;top:10px;background:#fff;padding:8px;z-index:9}
@media(max-width:900px){.stats{grid-template-columns:repeat(3,1fr)}}
@media(max-width:720px){.grid2{grid-template-columns:1fr}.stats{grid-template-columns:repeat(2,1fr)}
 .hdr{padding:12px 14px;padding-top:calc(12px + env(safe-area-inset-top,0px))}.brand p{display:none}.brand h1{font-size:15px}
 main{padding:16px 14px 32px}.who{text-align:left}
 .resp thead{display:none}.resp tr{display:block;border-bottom:1px solid #ece7f4;padding:8px 0}.resp td{display:flex;justify-content:space-between;gap:12px;border:0;padding:5px 12px}
 .resp td::before{content:attr(data-label);color:var(--muted);font-size:12.5px;text-transform:uppercase;letter-spacing:.4px}
 .resp td.actions{justify-content:flex-start}.resp td.actions::before{content:none}}

/* project titles: link colour without heavy underline */
.proj-title a{color:var(--ink);font-weight:600;text-decoration:none}
.proj-title a:hover{color:var(--purple);text-decoration:underline}
.actions{align-items:center}
@media(max-width:720px){
 /* dashboard projects: title, one meta line, actions */
 .proj-table tr{display:grid;grid-template-columns:auto auto 1fr;align-items:center;gap:6px 10px;padding:12px 12px}
 .proj-table td{display:block;padding:0;border:0}
 .proj-table td::before{content:none}
 .proj-table td.proj-title{grid-column:1/-1;font-size:15.5px}
 .proj-table td[data-label="Last saved"]{color:var(--muted);font-size:13.5px}
 .proj-table td[data-label="Status"]{justify-self:end}
 .proj-table td.actions{grid-column:1/-1;padding-top:4px}
 .proj-table td.empty{grid-column:1/-1}
 /* lecturer student list: two columns per card */
 .stu-table tr{display:grid;grid-template-columns:1fr 1fr;gap:2px 12px;padding:10px 12px}
 .stu-table td{display:flex;flex-wrap:wrap;align-items:center;gap:2px 6px;padding:3px 0;border:0}
 .stu-table td::before{font-size:11px;flex-basis:100%}
 .stu-table td.actions{grid-column:1/-1;flex-direction:row;padding-top:6px}
 .stu-table td.empty{grid-column:1/-1}
}
th.sortable{cursor:pointer;user-select:none;white-space:nowrap}
th.sortable:hover{color:var(--ink)}
th.sortable[aria-sort=ascending]::after{content:" B2";font-size:9px}
th.sortable[aria-sort=descending]::after{content:" BC";font-size:9px}
.pwd-row{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--muted);margin:-6px 0 12px}
.pwd-row input{width:auto;min-height:auto}