.hc-student-dashboard {
    max-width: 1000px;
    margin: 20px auto;
}

.hc-student-dashboard h2 {
    color: #2c3e50;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #3498db;
}

.hc-certificates-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
    background: white;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.hc-certificates-table th,
.hc-certificates-table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid #e0e0e0;
}

.hc-certificates-table th {
    background: #f8f9fa;
    font-weight: 600;
    color: #2c3e50;
}

.hc-certificates-table tr:hover {
    background: #f8f9fa;
}

.hc-download-btn {
    background: #3498db;
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 500;
    transition: background 0.3s;
}

.hc-download-btn:hover:not(:disabled) {
    background: #2980b9;
}

.hc-download-btn:disabled {
    background: #95a5a6;
    cursor: not-allowed;
}

@media (max-width: 768px) {
    .hc-certificates-table {
        display: block;
        overflow-x: auto;
    }
    
    .hc-certificates-table th,
    .hc-certificates-table td {
        min-width: 150px;
    }
}