/* ═══ Home Page — Semester & Course Toppers ═══ */
.sem-toppers-section {
    position: relative;
    padding: 5rem 0;
    background: linear-gradient(180deg, #F8FAFC 0%, #fff 45%, #EFF6FF 100%);
    overflow: hidden;
}

.sem-toppers-section::before {
    content: '';
    position: absolute;
    top: -120px;
    right: -80px;
    width: 320px;
    height: 320px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(37, 99, 235, .08) 0%, transparent 70%);
    pointer-events: none;
}

.sem-toppers-header {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 2.5rem;
}

.sem-toppers-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;
}

.sem-toppers-header h2 {
    margin-bottom: 10px;
    color: #0F172A;
    font-family: "Poppins", sans-serif;
    font-size: clamp(1.75rem, 4vw, 2.35rem);
    font-weight: 800;
    letter-spacing: -.03em;
}

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

.sem-toppers-tabs {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-bottom: 2rem;
}

.sem-toppers-tab {
    padding: 10px 18px;
    border: 1.5px solid #E2E8F0;
    border-radius: 999px;
    background: #fff;
    color: #475569;
    font-size: .84rem;
    font-weight: 700;
    cursor: pointer;
    transition: all .25s ease;
}

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

.sem-toppers-tab.active {
    border-color: #2563EB;
    background: linear-gradient(135deg, #1E3A8A, #2563EB);
    color: #fff;
    box-shadow: 0 8px 22px rgba(37, 99, 235, .22);
}

.sem-toppers-panel {
    display: none;
}

.sem-toppers-panel.active {
    display: block;
    animation: semTopperFade .35s ease;
}

@keyframes semTopperFade {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.sem-toppers-panel-title {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 1.25rem;
    color: #0F172A;
    font-family: "Poppins", sans-serif;
    font-size: 1.2rem;
    font-weight: 800;
}

.sem-toppers-panel-title i {
    width: 38px;
    height: 38px;
    display: grid;
    place-items: center;
    border-radius: 10px;
    background: rgba(37, 99, 235, .1);
    color: #2563EB;
}

.sem-toppers-course-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.25rem;
}

.sem-toppers-course-card {
    border: 1px solid #E2E8F0;
    border-radius: 20px;
    background: #fff;
    box-shadow: 0 10px 36px rgba(15, 23, 42, .06);
    overflow: hidden;
}

.sem-toppers-course-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 14px 16px;
    background: linear-gradient(135deg, #EFF6FF 0%, #F8FAFC 100%);
    border-bottom: 1px solid #E2E8F0;
}

.sem-toppers-course-head h3 {
    margin: 0;
    color: #1E3A8A;
    font-family: "Poppins", sans-serif;
    font-size: .92rem;
    font-weight: 800;
}

.sem-toppers-course-head span {
    padding: 4px 10px;
    border-radius: 999px;
    background: rgba(37, 99, 235, .1);
    color: #2563EB;
    font-size: .68rem;
    font-weight: 800;
    letter-spacing: .04em;
    text-transform: uppercase;
}

.sem-toppers-members {
    display: grid;
    gap: 10px;
    padding: 14px;
}

.sem-toppers-member {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    border: 1px solid #F1F5F9;
    border-radius: 14px;
    background: #FAFBFC;
    transition: all .22s ease;
}

.sem-toppers-member:hover {
    border-color: rgba(37, 99, 235, .18);
    background: #fff;
    box-shadow: 0 6px 18px rgba(15, 23, 42, .05);
}

.sem-toppers-member.empty {
    opacity: .72;
    border-style: dashed;
}

.sem-toppers-avatar {
    width: 46px;
    height: 46px;
    flex-shrink: 0;
    border-radius: 12px;
    object-fit: cover;
    border: 2px solid rgba(37, 99, 235, .15);
}

.sem-toppers-avatar-fallback {
    width: 46px;
    height: 46px;
    flex-shrink: 0;
    display: grid;
    place-items: center;
    border-radius: 12px;
    background: linear-gradient(135deg, #2563EB, #1E3A8A);
    color: #fff;
    font-size: .95rem;
    font-weight: 800;
}

.sem-toppers-slot {
    width: 28px;
    height: 28px;
    flex-shrink: 0;
    display: grid;
    place-items: center;
    border-radius: 8px;
    background: linear-gradient(135deg, #D97706, #F59E0B);
    color: #fff;
    font-size: .72rem;
    font-weight: 800;
}

.sem-toppers-slot.empty {
    background: #E2E8F0;
    color: #94A3B8;
}

.sem-toppers-member-body {
    flex: 1;
    min-width: 0;
}

.sem-toppers-member-body strong {
    display: block;
    color: #0F172A;
    font-size: .88rem;
    font-weight: 800;
    line-height: 1.3;
}

.sem-toppers-member-body small {
    display: block;
    margin-top: 2px;
    color: #64748B;
    font-size: .74rem;
    line-height: 1.4;
}

.sem-toppers-score {
    padding: 5px 10px;
    border-radius: 999px;
    background: rgba(16, 185, 129, .1);
    color: #047857;
    font-size: .72rem;
    font-weight: 800;
    white-space: nowrap;
}

.sem-toppers-footer-cta {
    text-align: center;
    margin-top: 2rem;
}

.sem-toppers-view-all {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 22px;
    border-radius: 999px;
    background: linear-gradient(135deg, #1E3A8A, #2563EB);
    box-shadow: 0 8px 22px rgba(37, 99, 235, .22);
    color: #fff !important;
    font-size: .86rem;
    font-weight: 700;
    text-decoration: none;
    transition: all .25s ease;
}

.sem-toppers-view-all:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 28px rgba(37, 99, 235, .28);
    color: #fff !important;
}

@media (max-width: 992px) {
    .sem-toppers-course-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .sem-toppers-section { padding: 3.5rem 0; }
    .sem-toppers-tabs { gap: 8px; }
    .sem-toppers-tab { width: 100%; text-align: center; }
}