/* Student & Teacher portal + public pages */
body.portal{background:#eef2f7}
.pbar{background:var(--portal,#1d4f9c);color:#fff;display:flex;align-items:center;justify-content:space-between;
  gap:20px;padding:10px 24px;flex-wrap:wrap;position:sticky;top:0;z-index:30}
.pbrand{display:flex;align-items:center;gap:10px}
.pbrand img{width:38px;height:38px;object-fit:contain;background:#fff;border-radius:50%;padding:2px}
.pbrand b{display:block;font-size:15px;line-height:1.15}
.pbrand span{font-size:11px;opacity:.85;letter-spacing:.1em;text-transform:uppercase}
.pnav{display:flex;gap:6px;flex-wrap:wrap}
.pnav a{color:#fff;padding:7px 13px;border-radius:8px;font-size:13.5px;font-weight:600;opacity:.9}
.pnav a:hover{background:rgba(255,255,255,.16);text-decoration:none}
.pnav a.on{background:rgba(255,255,255,.24)}
.pnav a.out{background:rgba(0,0,0,.22)}
.pmain{max-width:1120px;margin:0 auto;padding:24px 20px 60px}
.ptitle{font-size:22px;margin:0 0 16px}
.pcards{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:20px}
@media(max-width:900px){.pcards{grid-template-columns:repeat(2,1fr)}}
.pcard{background:#fff;border-radius:14px;padding:16px 18px;border:1px solid #e3e8ef;
  box-shadow:0 8px 24px -20px rgba(16,42,84,.6)}
.pcard .n{font-size:26px;font-weight:700;color:var(--portal,#1d4f9c)}
.pcard .l{font-size:12px;text-transform:uppercase;letter-spacing:.08em;color:#7b8794;margin-top:2px}
.hw{background:#fff;border:1px solid #e3e8ef;border-radius:14px;padding:16px 18px;margin-bottom:12px}
.hw h4{margin:0 0 4px;font-size:16px}
.hw .meta{font-size:12px;color:#7b8794;margin-bottom:6px}
.hw .due{color:#b4342b;font-weight:600}

/* Auth cards */
.auth-wrap{min-height:100vh;display:grid;place-items:center;padding:30px 16px;
  background:linear-gradient(140deg,#0f2a55,#1d4f9c 55%,#1a9c53)}
.auth-card{background:#fff;border-radius:18px;padding:30px 28px;width:100%;max-width:400px;
  box-shadow:0 30px 60px -30px rgba(0,0,0,.6)}
.auth-card h2{margin:0 0 4px;font-size:21px}
.auth-card p.sub{margin:0 0 18px;color:#7b8794;font-size:13px}
.auth-logo{width:64px;height:64px;object-fit:contain;display:block;margin:0 auto 12px}
.auth-card .btn{width:100%;justify-content:center;background:var(--portal,#1d4f9c)}
.auth-links{margin-top:14px;font-size:12.5px;text-align:center;color:#7b8794}
.demo{background:#f4f7fb;border:1px dashed #c3d1e4;border-radius:10px;padding:9px 12px;font-size:12px;margin-top:14px;color:#456}