:root{
    --portal-primary:#0f9d94;
    --portal-accent:#ffbf00;
    --portal-bg:#edf8f7;
    --portal-text:#13353b;
}
*{box-sizing:border-box}
body.portal-body{
    margin:0;
    font-family:'Roboto',sans-serif;
    background:linear-gradient(170deg,#eaf9f7 0%,#f7fcfb 55%,#fff8e6 100%);
    color:var(--portal-text);
    overflow-x:hidden;
    max-width:100vw;
}
.portal-shell{width:min(1080px,92%);margin:0 auto}
.portal-topbar{
    background:linear-gradient(120deg,var(--portal-primary),#0a7f78);
    border-bottom:4px solid var(--portal-accent);
    padding:.75rem 0;
    box-shadow:0 8px 24px rgba(16,24,40,.15);
}
.portal-brand{
    color:#fff;
    text-decoration:none;
    font-weight:800;
    letter-spacing:.01em;
    display:inline-flex;
    align-items:center;
    gap:.45rem;
}
.portal-card{
    background:#fff;
    border:1px solid rgba(15,157,148,.18);
    border-radius:14px;
    box-shadow:0 10px 30px rgba(15,157,148,.08);
}
.portal-title{
    font-size:clamp(1.45rem,2vw,2rem);
    color:#0e6f69;
    font-weight:800;
}
.portal-subtitle{color:#4e6a6e;font-size:.95rem}
.portal-body .btn-primary{
    background:var(--portal-primary);
    border-color:var(--portal-primary);
}
.portal-body .btn-primary:hover{
    background:#0c8881;
    border-color:#0c8881;
}
.portal-body .btn-outline-primary{
    border-color:var(--portal-primary);
    color:var(--portal-primary);
}
.portal-body .btn-outline-primary:hover{
    background:var(--portal-primary);
    color:#fff;
}
.portal-badge{
    background:rgba(255,191,0,.18);
    color:#7c5b00;
    border:1px solid rgba(255,191,0,.45);
    border-radius:999px;
    padding:.25rem .65rem;
    font-size:.78rem;
    font-weight:700;
}
.portal-body .form-control,.portal-body .form-select{
    border-radius:10px;
    border:1px solid rgba(19,53,59,.2);
}
.portal-body .form-control:focus,.portal-body .form-select:focus{
    border-color:var(--portal-primary);
    box-shadow:0 0 0 .2rem rgba(15,157,148,.16);
}

/* Mobile Responsive - Student Portal */
@media (max-width: 768px) {
    .portal-shell{width:100%;margin:0;padding:0 1rem}
    .portal-topbar{padding:.5rem 1rem}
    .portal-brand{font-size:1rem}
    .portal-card{border-radius:10px;padding:1rem!important}
    .portal-title{font-size:1.3rem}
    .portal-subtitle{font-size:.85rem}
    .portal-badge{font-size:.7rem;padding:.2rem .5rem}
    .portal-body .form-control,.portal-body .form-select{font-size:1rem;padding:.75rem;border-radius:8px}
    .portal-body .btn{padding:.75rem 1rem;font-size:.9rem}
    .portal-body .btn-sm{padding:.5rem .75rem;font-size:.85rem}
    .portal-body .row>div{margin-bottom:1rem}
    .portal-body .table-responsive{margin:0 -1rem;padding:0 1rem}
    .portal-body table{font-size:.85rem}
    .portal-body table th,.portal-body table td{padding:.5rem .25rem}
    .portal-body .d-flex.flex-wrap{flex-direction:column;gap:1rem}
    .portal-body .modal-dialog{margin:.5rem;max-width:calc(100% - 1rem)}
    .portal-body .modal-body{padding:1rem}
}

@media (max-width: 575px) {
    .portal-shell{padding:0 .75rem}
    .portal-topbar{padding:.5rem .75rem}
    .portal-brand{font-size:.9rem}
    .portal-card{border-radius:8px;padding:.75rem!important}
    .portal-title{font-size:1.1rem}
    .portal-body .form-control,.portal-body .form-select{font-size:.9rem;padding:.6rem;border-radius:6px}
    .portal-body .btn{padding:.6rem .75rem;font-size:.85rem}
    .portal-body table{font-size:.75rem}
    .portal-body table th,.portal-body table td{padding:.4rem .2rem}
}