/* ═══ Academic Hub — Exams/Results + Notices ═══ */
.hub-section {
    position: relative;
    padding: 5rem 0;
    overflow: hidden;
    background:
        radial-gradient(circle at 12% 18%, rgba(37, 99, 235, .12) 0%, transparent 42%),
        radial-gradient(circle at 88% 82%, rgba(232, 93, 4, .1) 0%, transparent 38%),
        linear-gradient(180deg, #EFF6FF 0%, #F8FAFC 35%, #fff 100%);
}

.hub-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        linear-gradient(rgba(255,255,255,.4) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.4) 1px, transparent 1px);
    background-size: 56px 56px;
    opacity: .35;
    pointer-events: none;
}

.hub-section .container {
    position: relative;
    z-index: 1;
}

.hub-header {
    text-align: center;
    max-width: 760px;
    margin: 0 auto 2.5rem;
}

.hub-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 14px;
    padding: 6px 14px;
    border-radius: 999px;
    background: rgba(37, 99, 235, .08);
    color: #1E3A8A;
    font-size: .72rem;
    font-weight: 800;
    letter-spacing: .16em;
    text-transform: uppercase;
}

.hub-header h2 {
    margin-bottom: 10px;
    color: #0F172A;
    font-family: "Poppins", sans-serif;
    font-size: clamp(1.75rem, 4vw, 2.4rem);
    font-weight: 800;
    letter-spacing: -.03em;
}

.hub-header p {
    margin: 0;
    color: #64748B;
    font-size: .98rem;
    line-height: 1.7;
}

.hub-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.5rem;
    align-items: stretch;
}

.hub-card {
    display: flex;
    flex-direction: column;
    min-height: 560px;
    border: 1px solid rgba(226, 232, 240, .95);
    border-radius: 24px;
    background: rgba(255, 255, 255, .88);
    backdrop-filter: blur(10px);
    box-shadow: 0 18px 50px rgba(15, 23, 42, .08);
    overflow: hidden;
}

.hub-card-head {
    padding: 1.25rem 1.35rem 1rem;
    border-bottom: 1px solid #EEF2F7;
    background: linear-gradient(135deg, rgba(37, 99, 235, .06) 0%, rgba(255,255,255,.95) 100%);
}

.hub-card-head h3 {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0 0 12px;
    color: #0F172A;
    font-family: "Poppins", sans-serif;
    font-size: 1.05rem;
    font-weight: 800;
}

.hub-card-head h3 i {
    width: 36px;
    height: 36px;
    display: grid;
    place-items: center;
    border-radius: 10px;
    background: rgba(37, 99, 235, .12);
    color: #2563EB;
    font-size: 1rem;
}

.hub-card--notices .hub-card-head h3 i {
    background: rgba(232, 93, 4, .12);
    color: #E85D04;
}

.hub-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.hub-tab {
    padding: 8px 16px;
    border: 1.5px solid #E2E8F0;
    border-radius: 999px;
    background: #fff;
    color: #475569;
    font-size: .8rem;
    font-weight: 700;
    cursor: pointer;
    transition: all .22s ease;
}

.hub-tab:hover {
    border-color: #93C5FD;
    color: #1E3A8A;
}

.hub-tab.active {
    border-color: #2563EB;
    background: linear-gradient(135deg, #1E3A8A, #2563EB);
    color: #fff;
    box-shadow: 0 6px 18px rgba(37, 99, 235, .22);
}

.hub-card-body {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    flex: 1;
    min-height: 0;
}

.hub-list-col {
    display: flex;
    flex-direction: column;
    min-height: 0;
    border-right: 1px solid #EEF2F7;
}

.hub-panel {
    display: none;
    flex: 1;
    min-height: 0;
    overflow: auto;
}

.hub-panel.active {
    display: flex;
    flex-direction: column;
}

.hub-list {
    display: grid;
    gap: 0;
}

.hub-list-item {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    padding: 14px 16px;
    border: 0;
    border-bottom: 1px solid #F1F5F9;
    background: transparent;
    text-align: left;
    cursor: pointer;
    transition: all .22s ease;
}

.hub-list-item:hover,
.hub-list-item.active {
    background: rgba(37, 99, 235, .05);
}

.hub-list-item.active {
    box-shadow: inset 3px 0 0 #2563EB;
}

.hub-list-icon {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
    display: grid;
    place-items: center;
    border-radius: 11px;
    background: rgba(37, 99, 235, .1);
    color: #2563EB;
    font-size: 1rem;
}

.hub-card--notices .hub-list-icon {
    background: rgba(232, 93, 4, .1);
    color: #E85D04;
}

.hub-list-content {
    flex: 1;
    min-width: 0;
}

.hub-list-content strong {
    display: block;
    color: #0F172A;
    font-size: .86rem;
    font-weight: 800;
    line-height: 1.35;
}

.hub-list-content small {
    display: block;
    margin-top: 3px;
    color: #64748B;
    font-size: .74rem;
    line-height: 1.45;
}

.hub-list-action {
    flex-shrink: 0;
}

.hub-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 12px;
    border: 0;
    border-radius: 10px;
    background: linear-gradient(135deg, #1E3A8A, #2563EB);
    color: #fff !important;
    font-size: .72rem;
    font-weight: 800;
    text-decoration: none;
    cursor: pointer;
    transition: all .22s ease;
    white-space: nowrap;
}

.hub-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(37, 99, 235, .24);
    color: #fff !important;
}

.hub-btn--orange {
    background: linear-gradient(135deg, #E85D04, #F97316);
}

.hub-btn--orange:hover {
    box-shadow: 0 6px 16px rgba(232, 93, 4, .24);
}

.hub-btn--ghost {
    background: #F8FAFC;
    border: 1px solid #E2E8F0;
    color: #475569 !important;
}

.hub-viewer-col {
    display: flex;
    flex-direction: column;
    min-height: 0;
    background: #F8FAFC;
}

.hub-viewer {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-height: 0;
}

.hub-viewer-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 12px 14px;
    border-bottom: 1px solid #E2E8F0;
    background: #fff;
}

.hub-viewer-head strong {
    color: #0F172A;
    font-size: .84rem;
    font-weight: 800;
    line-height: 1.35;
}

.hub-viewer-head span {
    padding: 4px 8px;
    border-radius: 999px;
    background: rgba(37, 99, 235, .08);
    color: #1E3A8A;
    font-size: .64rem;
    font-weight: 800;
    text-transform: uppercase;
}

.hub-viewer-frame-wrap {
    flex: 1;
    min-height: 320px;
    background: #fff;
}

.hub-viewer-frame-wrap iframe {
    width: 100%;
    height: 100%;
    min-height: 320px;
    border: 0;
    background: #fff;
}

.hub-viewer-empty {
    flex: 1;
    display: grid;
    place-items: center;
    padding: 2rem 1.5rem;
    text-align: center;
}

.hub-viewer-empty i {
    width: 64px;
    height: 64px;
    margin-bottom: 12px;
    display: grid;
    place-items: center;
    border-radius: 18px;
    background: rgba(37, 99, 235, .08);
    color: #2563EB;
    font-size: 1.6rem;
}

.hub-viewer-empty p {
    max-width: 260px;
    margin: 0;
    color: #64748B;
    font-size: .84rem;
    line-height: 1.6;
}

.hub-empty-list {
    padding: 2rem 1.25rem;
    text-align: center;
    color: #94A3B8;
    font-size: .84rem;
}

.hub-card-foot {
    padding: .85rem 1rem;
    border-top: 1px solid #EEF2F7;
    background: #fff;
    text-align: center;
}

.hub-card-foot a {
    color: #2563EB;
    font-size: .82rem;
    font-weight: 700;
    text-decoration: none;
}

.hub-card-foot a:hover {
    color: #1E3A8A;
}

@media (max-width: 1100px) {
    .hub-grid { grid-template-columns: 1fr; }
    .hub-card { min-height: auto; }
}

@media (max-width: 768px) {
    .hub-section { padding: 3.5rem 0; }
    .hub-card-body { grid-template-columns: 1fr; }
    .hub-list-col { border-right: 0; border-bottom: 1px solid #EEF2F7; max-height: 280px; }
    .hub-viewer-frame-wrap,
    .hub-viewer-frame-wrap iframe { min-height: 260px; }
}