/* Badge cho Grade */
.grade-badge {
    padding: 5px 12px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 800;
    text-transform: uppercase;
}

.badge-g1 { background: #ea4335; color: #fff; box-shadow: 0 0 12px rgba(234,67,53,0.4); }
.badge-g2 { background: #fbbc05; color: #000; }
.badge-g3 { background: #34a853; color: #fff; }

/* Filter Bar */
.filter-bar {
    margin-bottom: 30px;
    display: flex;
    justify-content: center;
    gap: 15px;
    align-items: center;
}

select {
    background: var(--bg-card);
    color: var(--primary);
    border: 1px solid var(--border);
    padding: 10px 20px;
    border-radius: 8px;
    outline: none;
}

/* Info Button */
.info-btn {
    background: rgba(161, 255, 206, 0.1);
    color: var(--primary);
    border: 1px solid var(--primary);
    padding: 6px 15px;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    transition: 0.3s;
}

.info-btn:hover { background: var(--primary); color: #000; }
.info-btn.empty { border-color: var(--text-dim); color: var(--text-dim); cursor: default; }

/* Modal Tối ƯU */
.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 30px;
}

.modal-table th { padding: 10px; border-bottom: 2px solid var(--border); }
.modal-table td { padding: 12px 10px; }